Fluid transmission pipeline and flow measurement method

Abstract

The present application discloses a fluid transmission pipeline and flow measurement method. The present application effectively solves the problem that it is difficult for thermal flow sensors to simultaneously measure the fluid flow rate and monitor the fluid properties of the flowing fluid. The first measuring component is parallel to the flow direction of the fluid medium to monitor the characteristic changes of the fluid medium, and the second measuring component is perpendicular to the flow direction of the fluid medium to measure the flow of the fluid medium. When the characteristics of the fluid medium change, the characteristic value obtained by the first measuring component is used to correct the flow obtained by the second measuring component, thereby obtaining the current mass flow of the fluid medium. By installing a baffle in the main channel, the full displacement of the fluid is facilitated, and the interference of the flow of the fluid medium to the first measuring component is reduced. By making the cross-sectional area of ​​the displacement section larger than the cross-sectional area of ​​the bypass flow channel, it is ensured that the fluid medium is fully displaced first and then slowly passes through the bypass flow channel, fully filtering the turbulence, thereby improving the measurement accuracy of the flow.

Description

Technical Field

[0001] The present application relates to the technical field of flow sensors, and in particular to a fluid transmission pipeline and a flow measurement method. Background Art

[0002] As a key component for measuring flow, flow sensors play a vital role in industrial production, aerospace, automotive electronics, medical health and other fields. Flow sensors can be divided into many types according to different measurement principles. Among them, thermal flow sensors have attracted widespread attention due to their simple structure, high measurement sensitivity, and ability to measure the mass flow of fluids. With the continuous maturity of MEMS technology, thermal flow sensors based on MEMS technology have gradually been applied to various industries.

[0003] The thermal flow sensor based on MEMS technology is a thermal sensor manufactured using micro-electromechanical system technology according to the working principle of thermal flow measurement. The sensor includes a heat source and a pair of temperature measuring elements. The temperature measuring elements are placed on both sides of the heat source to detect the temperature distribution on both sides of the heat source during the flow of the fluid to detect the flow rate. The output of the thermal flow sensor is not only related to the velocity of the fluid, but also to the properties of the fluid medium. For different fluids, the output of the thermal flow sensor is different at the same flow rate; for the same fluid, the output of the thermal flow sensor is different at different flow rates. Therefore, for flowing fluids, it is difficult for thermal flow sensors to simultaneously achieve fluid flow measurement and fluid property monitoring, which leads to inaccurate flow measurement results of thermal flow sensors. Summary of the invention

[0004] The embodiments of the present application provide a fluid transmission pipeline and a flow measurement method to effectively solve the problem that it is difficult for a thermal flow sensor to simultaneously measure the fluid flow and monitor the fluid properties of a flowing fluid.

[0005] According to one aspect of the present application, the present application provides a fluid transmission pipeline, which includes a main channel and a bypass channel fluidly connected to the main channel. The fluid transmission pipeline also includes a first measuring component and a second measuring component, the first measuring component is located in the main channel, and the second measuring component is located in the bypass channel.

[0006] Furthermore, the first measuring component and the second measuring component are both thermal flow sensors.

[0007] Further, the main channel includes a main fluid inlet, a main fluid outlet, and a main flow channel formed by a pipeline between the main fluid inlet and the main fluid outlet;

[0008] The bypass channel includes a bypass fluid inlet and a bypass fluid outlet respectively connected to the main flow channel, and a bypass flow channel formed by a pipeline between the bypass fluid inlet and the bypass fluid outlet;

[0009] Wherein, the cross-sectional area of ​​the bypass flow channel is smaller than the cross-sectional area of ​​the main flow channel.

[0010] Furthermore, the first measuring component is fixedly connected to the inner wall of the main flow channel, and the main extension direction of the first measuring component is parallel to the flow direction of the fluid medium in the main flow channel;

[0011] The second measuring component is fixedly connected to the inner wall of the bypass flow channel, and a main extension direction of the second measuring component is perpendicular to a flow direction of the fluid medium in the bypass flow channel.

[0012] Furthermore, the main flow channel includes a baffle, and the baffle is used to fully close the main flow channel.

[0013] Furthermore, the main flow channel includes a fluid displacement section and a fluid outlet section respectively located on both sides of the baffle, the first measuring component is located in the fluid displacement section, and the bypass fluid inlet is fluidly connected to the fluid displacement section, the bypass fluid outlet is fluidly connected to the fluid outlet section, and the volume of the fluid displacement section is greater than the volume of the fluid outlet section.

[0014] Further, the distance between the baffle and the bypass fluid inlet is greater than the distance between the baffle and the bypass fluid outlet.

[0015] Further, a ratio of a distance between the baffle and the bypass fluid inlet to a distance between the baffle and the bypass fluid outlet is greater than 5.

[0016] Further, a cross-sectional area of ​​the fluid displacement section is larger than a cross-sectional area of ​​the bypass flow channel.

[0017] Furthermore, a ratio of a cross-sectional area of ​​the fluid displacement section to a cross-sectional area of ​​the bypass flow channel is greater than 100.

[0018] Furthermore, it is characterized in that the first measuring component is located between the baffle and the bypass fluid inlet.

[0019] Furthermore, the first measuring component abuts against the baffle.

[0020] Furthermore, the first measuring component is located on the lower side wall of the main channel.

[0021] Furthermore, a filter screen is provided in the main channel, the filter screen is located between the main fluid inlet and the bypass fluid inlet, and the filter screen covers the cross section of the main channel.

[0022] Further, the distance between the second measuring component and the bypass fluid inlet is greater than the distance between the second measuring component and the bypass fluid outlet.

[0023] Furthermore, the first measuring component includes a main heating element and at least one main temperature measuring element, and the main temperature measuring element is located on one side of the main heating element.

[0024] Furthermore, the main extension direction of the first measuring component is the routing extension direction of the main heating element and the main temperature measuring element.

[0025] Further, the main circuit temperature measuring element comprises a first main circuit temperature measuring element and a second main circuit temperature measuring element, and the first main circuit temperature measuring element and the second main circuit temperature measuring element are respectively located on both sides of the main circuit heating element;

[0026] The first main circuit temperature measuring element and the second main circuit temperature measuring element are symmetrically arranged on both sides of the main circuit heating element;

[0027] The first main circuit temperature measuring element and the second main circuit temperature measuring element are both temperature sensors;

[0028] The main heating element is a micro heat source.

[0029] Furthermore, the first measuring component includes a main fluid environment temperature measuring element.

[0030] Furthermore, the second measuring component includes a bypass heating element, a first bypass temperature measuring element, and a second bypass temperature measuring element, and the first bypass temperature measuring element and the second bypass temperature measuring element are respectively located on both sides of the bypass heating element.

[0031] Furthermore, the main extension direction of the second measuring component is the routing extension direction of the bypass heating element, the first bypass temperature measuring element and the second bypass temperature measuring element.

[0032] Furthermore, the first bypass temperature measuring element and the second bypass temperature measuring element are symmetrically arranged on both sides of the bypass heating element;

[0033] The first bypass temperature measuring element and the second bypass temperature measuring element are both temperature sensors; the bypass heating element is a micro heat source.

[0034] Furthermore, the second measuring component includes a bypass fluid environment temperature measuring element.

[0035] Furthermore, the second measuring component is located on the upper side wall of the bypass channel, and the bypass heating element, the first bypass temperature measuring element, the second bypass temperature measuring element and the bypass fluid environment temperature measuring element are all located on a side away from the side wall of the bypass channel.

[0036] According to another aspect of the present application, the present application provides a flow measurement method, the method comprising:

[0037] monitoring a characteristic value of a fluid medium flowing in a main channel of the fluid transmission pipeline via a first measuring component;

[0038] monitoring the flow rate of the fluid medium flowing in the bypass channel of the fluid transmission pipeline via a second measurement component;

[0039] In the case where the characteristic of the fluid medium changes, the flow rate is corrected based on the characteristic value, and the corrected flow rate is used as the current mass flow rate of the fluid medium flowing in the fluid transmission pipeline.

[0040] The advantage of the present application is that it effectively solves the problem that it is difficult for a thermal flow sensor to simultaneously measure the flow rate of a flowing fluid and monitor the fluid properties. By setting a connected main channel and a bypass channel, the first measuring component is used to monitor the characteristic changes of the fluid medium in parallel with the flow direction of the fluid medium, and the second measuring component is used to measure the flow rate of the fluid medium perpendicular to the flow direction of the fluid medium. When the characteristics of the fluid medium change, the characteristic value obtained by the first measuring component is used to correct the flow obtained by the second measuring component in real time, thereby obtaining the current mass flow rate of the fluid medium flowing in the fluid transmission pipeline. Exemplarily, a fluid displacement section is formed by installing a baffle in the main channel, and the volume of the fluid displacement section is larger than the fluid outlet section, which facilitates the full displacement of the fluid, thereby greatly reducing the interference of the flow of the fluid medium on the first measuring component, and facilitating accurate monitoring of the changes of the fluid medium. By setting the cross-sectional area of ​​the displacement section to be larger than the cross-sectional area of ​​the bypass flow channel, a high resistance is formed at the inlet of the bypass fluid to prevent particles in the fluid medium from entering the bypass channel. In addition, by setting the first measuring component on the lower side wall of the main channel and abutting the baffle, the fluid flow rate caused by gravity is avoided, ensuring the accuracy of the first measuring component in monitoring the change of the fluid medium. By setting the second measuring component on the upper side wall of the bypass channel, the particles and other impurities in the fluid medium are kept away from the second measuring component by gravity, further improving the measurement accuracy and reliability. By setting the filter net in the main channel, the fluid medium is filtered and the particles in the fluid medium are absorbed. It has strong versatility, is applicable to both liquids and gases, and is easy to disassemble and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0042] Figure 1 It is a schematic diagram of a fluid transmission pipeline structure provided by some embodiments of the present application;

[0043] Figure 2 is a schematic structural diagram of a first measurement component provided in some embodiments of the present application;

[0044] Figure 3 is a schematic structural diagram of a second measurement component provided in some embodiments of the present application;

[0045] Figure 4 This application Figure 1 An enlarged view of part A of Example 2;

[0046] Figure 5 It is a flow chart of a method for measuring flow in a fluid transmission pipeline provided in some embodiments of the present application. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] At least one embodiment of the present application provides a fluid transmission pipeline, which includes a main channel and a bypass channel connected to the main channel fluid. The fluid transmission pipeline also includes a first measuring component and a second measuring component. The first measuring component is located in the main channel and is used to monitor changes in characteristics of a fluid medium flowing in the fluid transmission pipeline. The second measuring component is located in the bypass channel and is used to measure the flow rate of the fluid medium.

[0050] As can be seen from the above, the present application effectively solves the problem that it is difficult for thermal flow sensors to simultaneously measure the flow rate of a flowing fluid and monitor the fluid properties. By setting a connected main channel and bypass channel, the first measuring component is parallel to the flow direction of the fluid medium to monitor the characteristic changes of the fluid medium, and the second measuring component is perpendicular to the flow direction of the fluid medium to measure the flow of the fluid medium. When the characteristics of the fluid medium change, the characteristic value of the fluid medium obtained by the first measuring component is used to correct the flow obtained by the second measuring component, thereby obtaining the current mass flow of the fluid medium flowing in the fluid transmission pipeline.

[0051] Figure 1 is a schematic diagram of a fluid transmission pipeline structure provided by some embodiments of the present application, Figure 2 is a schematic diagram of the structure of a first measurement component provided in some embodiments of the present application, Figure 3 is a schematic diagram of the structure of a second measurement component provided in some embodiments of the present application, Figure 4 This application Figure 1 An enlarged view of part A of the embodiment, Figure 5 It is a flow chart of a method for measuring flow in a fluid transmission pipeline provided in some embodiments of the present application.

[0052] like Figure 1 As shown, the fluid transmission pipeline includes a main channel 100 and a bypass channel 200 in fluid communication with the main channel 100. The fluid transmission pipeline also includes a first measurement component 300 and a second measurement component 400. The first measurement component 300 is located in the main channel 100 and is used to monitor the characteristic changes of the fluid medium flowing in the fluid transmission pipeline. The second measurement component 400 is located in the bypass channel 200 and is used to measure the flow rate of the fluid medium. The characteristics of the fluid medium are reflected by a series of characteristic values ​​related to the fluid medium, such as the thermal conductivity of the fluid medium and the thermal diffusivity of the fluid medium. The characteristic changes of the fluid medium are monitored by the changes in the characteristic values.

[0053] For example, in some examples, the first measurement component 300 and the second measurement component 400 are both thermal flow sensors, which perform measurements based on the heat transfer principle and utilize the heat exchange relationship between the flowing fluid medium and the first measurement component 300 and the second measurement component 400, respectively.

[0054] For example, the main channel 100 includes a main fluid inlet 101, a main fluid outlet 102, and a main flow channel formed by a pipeline between the main fluid inlet 101 and the main fluid outlet 102; the bypass channel 200 includes a bypass fluid inlet 201 and a bypass fluid outlet 202 respectively connected to the main flow channel, and a bypass flow channel 203 formed by a pipeline between the bypass fluid inlet 201 and the bypass fluid outlet 202; wherein the cross-sectional area of ​​the bypass flow channel 203 is smaller than the cross-sectional area of ​​the main flow channel. When the cross-sectional area of ​​the bypass flow channel 203 is smaller than the cross-sectional area of ​​the main flow channel, the second measurement component 400 located in the bypass channel 200 can ensure both accuracy and high sensitivity.

[0055] For example, the first measuring component 300 is fixedly connected to the inner wall of the main flow channel, and the main extension direction of the first measuring component 300 is parallel to the flow direction of the fluid medium in the main flow channel. The parallel arrangement avoids the change of the thermal conductivity of the fluid medium due to the flow of the fluid medium, which leads to inaccurate measurement results of the first measuring component 300.

[0056] The second measuring component 400 is fixedly connected to the inner wall of the bypass channel 203, and the main extension direction of the second measuring component 400 is perpendicular to the flow direction of the fluid medium in the bypass channel 203, and real-time correction is performed through the measurement value of the first measuring component 300. The vertical setting makes the second measuring component 400 more sensitive, which is convenient for accurately measuring the flow rate of the fluid medium.

[0057] For example, in some examples, the main flow channel includes a baffle 103, and the baffle 103 is used to fully close the main flow channel.

[0058] For example, in some examples, the main flow channel includes a fluid displacement section 104 and a fluid outlet section 105 respectively located on both sides of the baffle 103, the first measurement component 300 is located in the fluid displacement section 104, and the bypass fluid inlet 201 is fluidically connected to the fluid displacement section 104, the bypass fluid outlet 202 is fluidically connected to the fluid outlet section 105, and the volume of the fluid displacement section 104 is greater than the volume of the fluid outlet section 105.

[0059] The main flow channel outlet is completely blocked by the baffle 103. After the fluid medium enters the main flow channel from the main fluid inlet 101, part of the fluid medium enters the bypass flow channel 203 through the bypass fluid inlet 201, and flows to the main fluid outlet 102 through the bypass fluid outlet 202 after being measured by the second measuring component 400 and discharged, while another part of the fluid medium enters the replacement section. The fluid medium entering the replacement section is replaced with the fluid medium entering the replacement section later in the replacement section, and the replaced part of the fluid medium enters the bypass channel 200 and flows out.

[0060] For example, the distance between the baffle 103 and the bypass fluid inlet 201 is greater than the distance between the baffle 103 and the bypass fluid outlet 202. This helps the particles in the fluid medium to fall to the middle area of ​​the fluid displacement section 104 due to gravity after the fluid medium impacts the baffle 103, thereby avoiding affecting the first measurement component 300 and the bypass fluid inlet 201, and improving the measurement reliability.

[0061] For example, in some examples, the ratio of the distance between the baffle 103 and the bypass fluid inlet 201 to the distance between the baffle 103 and the bypass fluid outlet 202 is greater than 5. It should be noted that the specific ratio can be adjusted according to the diameter of the main flow channel and the diameter of the bypass flow channel 203.

[0062] For example, the cross-sectional area of ​​the fluid displacement section 104 is larger than the cross-sectional area of ​​the bypass channel 203. Since the bypass fluid inlet 201 has a small diameter, a high resistance is formed to prevent particles in the fluid medium from entering the bypass channel 200.

[0063] For example, in some examples, the ratio of the cross-sectional area of ​​the fluid displacement section 104 to the cross-sectional area of ​​the bypass flow channel 203 is greater than 100, ensuring that the fluid medium is fully replaced in the fluid displacement section 104 before entering the bypass flow channel 203, thereby improving the replacement rate of the fluid medium at the entrance. The ratio of the length of the bypass flow channel 203 to its diameter is greater than 10, and the fluid medium slowly passes through the bypass flow channel 203, fully filtering the turbulence in the fluid medium, and further improving the stability of the flow of the fluid medium.

[0064] For example, the first measurement assembly 300 is located between the baffle 103 and the bypass fluid inlet 201 .

[0065] For example, the first measurement component 300 is in contact with the baffle 103, so that the fluid medium flows through the surface of the first measurement component 300, but the flow velocity of the fluid medium is close to zero, effectively avoiding the measurement error of the first measurement component 300 caused by the flow change caused by the flow of the fluid medium in the fluid outlet section 105. Of course, the distance between the first measurement component 300 and the baffle 103 can be determined according to the measurement requirements, and the embodiments of the present application are not limited to this.

[0066] For example, in some examples, the first measuring component 300 is located on the lower side wall of the main channel 100. The first measuring component 300 located on the lower side wall of the main channel 100 can reduce the fluid flow rate caused by the gravity of the fluid medium, avoiding affecting the first measuring component 300 to monitor the changes of the fluid medium.

[0067] For example, in some examples, a filter screen is provided in the main channel 100, the filter screen is located between the main fluid inlet 101 and the bypass fluid inlet 201, and the filter screen covers the cross section of the main channel 100. The filter screen is used to filter the fluid medium and absorb particles in the fluid medium, which has strong versatility, is applicable to both liquids and gases, and is easy to disassemble and replace.

[0068] For example, the distance between the second measuring component 400 and the bypass fluid inlet 201 is greater than the distance between the second measuring component 400 and the bypass fluid outlet 202, so that the second measuring component 400 is located far away from the bypass fluid inlet 201 and away from the bypass fluid outlet 202. The flow of the fluid medium at this position is smoother, and the measurement accuracy of the second measuring component 400 is further improved.

[0069] For example, in some examples, the first measurement component 300 includes a main heating element 301 and at least one main temperature measuring element, the main heating element 301 is used to increase the temperature of the fluid medium flowing through the first measurement component 300, the main temperature measuring element is located on one side of the main heating element 301, and the main temperature measuring element is used to sense the temperature of the heat exchange surface of the fluid medium when it flows through the main temperature measuring element. It should be noted that the number of main temperature measuring elements can be set as needed, which can be one or two, but all are calculated based on the zero flow rate of the fluid medium on the first measurement component 300; when the number of main temperature measuring elements is one, the characteristic value of the fluid medium can be calculated by the temperature difference between the main heating element 301 and the main temperature measuring element and the zero flow rate of the fluid medium.

[0070] For example, Figure 2 As shown, in some examples, the main temperature measuring element includes a first main temperature measuring element 302 and a second main temperature measuring element 303, the main heating element 301 is used to increase the temperature of the fluid medium flowing through the first measuring component 300, and the first main temperature measuring element 302 and the second main temperature measuring element 303 are respectively located on both sides of the main heating element 301.

[0071] The first main circuit temperature measuring element 302 is used to sense the temperature of the heat exchange surface of the fluid medium when it flows through the first main circuit temperature measuring element 302, and the second main circuit temperature measuring element 303 is used to sense the temperature of the heat exchange surface of the fluid medium when it flows through the second main circuit temperature measuring element 303. Since the flow rate of the fluid medium on the first main circuit temperature measuring element 302 and the second main circuit temperature measuring element 303 is zero, the temperature difference between the first main circuit temperature measuring element 302 and the second main circuit temperature measuring element 303 is zero, so that the characteristic value of the fluid medium, for example, the thermal conductivity of the fluid medium can be calculated.

[0072] In some examples, the first main circuit temperature measuring element 302 and the second main circuit temperature measuring element 303 are symmetrically arranged on both sides of the main circuit heating element 301. Of course, the distance between the first main circuit temperature measuring element 302 and the main circuit heating element 301 and the distance between the second main circuit temperature measuring element 303 and the main circuit heating element 301 can be determined according to measurement requirements, and the embodiments of the present application are not limited thereto.

[0073] For example, the main extension direction of the first measurement component 300 is the routing extension direction of the main heating element 301 , the first main temperature measuring element 302 , and the second main temperature measuring element 303 .

[0074] For example, the first main circuit temperature measuring element 302 and the second main circuit temperature measuring element 303 are both temperature sensors. For example, the main circuit heating element 301 is a micro heat source.

[0075] For example, the first measurement component 300 further includes a main fluid environment temperature measuring element 304, which is used to measure the ambient temperature of the main flow channel. In some examples, the main fluid environment temperature measuring element 304 is a temperature sensor, and the wiring extension direction of the main fluid environment temperature measuring element 304 is parallel to the flow direction of the fluid medium in the main flow channel. The main fluid environment temperature measuring element 304 is used to measure the ambient temperature of the main flow channel to avoid errors in the measurement results caused by the thermal effect of the temperature of the fluid medium.

[0076] For example, Figure 3 , Figure 4 As shown, in some examples, the second measurement component 400 includes a bypass heating element 401, a first bypass temperature measuring element 402, and a second bypass temperature measuring element 403, the bypass heating element 401 is used to increase the temperature of the fluid medium flowing through the second measurement component 400, and the first bypass temperature measuring element 402 and the second bypass temperature measuring element 403 are respectively located on both sides of the bypass heating element 401;

[0077] The first bypass temperature measuring element 402 is used to measure the temperature of the heat exchange surface of the fluid medium when it flows through the first bypass temperature measuring element 402, and the second bypass temperature measuring element 403 is used to measure the temperature of the heat exchange surface of the fluid medium when it flows through the second bypass temperature measuring element 403. When the fluid medium passes through the second measurement component 400, a temperature difference related to the flow rate of the fluid medium is formed between the first bypass temperature measuring element 402 and the second bypass temperature measuring element 403, and the flow rate of the fluid medium is measured according to the temperature difference.

[0078] In some examples, the first bypass temperature measuring element 402 and the second bypass temperature measuring element 403 are symmetrically arranged on both sides of the bypass heating element 401. Of course, the distance between the first bypass temperature measuring element 402 and the bypass heating element 401 and the distance between the second bypass temperature measuring element 403 and the bypass heating element 401 can be determined according to actual measurement requirements, and the embodiments of the present application are not limited thereto.

[0079] For example, the main extension direction of the second measurement component 400 is the routing extension direction of the bypass heating element 401 , the first bypass temperature measuring element 402 , and the second bypass temperature measuring element 403 .

[0080] For example, the first bypass temperature measuring element 402 and the second bypass temperature measuring element 403 are both temperature sensors. For example, the bypass heating element 401 is a micro heat source.

[0081] For example, the second measurement component 400 further includes a bypass fluid environment temperature measuring element 404, which is used to measure the ambient temperature of the bypass flow channel 203. In some examples, the bypass fluid environment temperature measuring element 404 is a temperature sensor, and the routing extension direction of the bypass fluid environment temperature measuring element 404 is perpendicular to the flow direction of the fluid medium in the bypass flow channel 203. By measuring the ambient temperature of the bypass flow channel 203 through the bypass fluid environment temperature measuring element 404, errors caused by the thermal effect of the temperature of the fluid medium on the measurement result can be avoided.

[0082] For example, in some examples, such as Figure 1 As shown, the second measuring assembly 400 is located on the upper side wall of the bypass channel 200, and the bypass heating element 401, the first bypass temperature measuring element 402, the second bypass temperature measuring element 403 and the bypass fluid environment temperature measuring element 404 are all located on a side away from the side wall of the bypass channel 200. Impurities such as particles in the fluid flowing in the bypass channel 200 are separated from the bypass heating element 401, the first bypass temperature measuring element 402, the second bypass temperature measuring element 403 and the bypass fluid environment temperature measuring element 404 by gravity, thereby further improving the measurement accuracy and reliability.

[0083] At least one embodiment of the present application further provides a flow measurement method, which can be used to measure the flow of a fluid medium in a fluid transmission pipeline described in any embodiment of the present application. Through the flow measurement method, the fluid flow measurement and fluid property monitoring of the flowing fluid medium can be performed simultaneously, and the accuracy of the fluid flow measurement result is greatly improved.

[0084] For example, in some examples, such as Figure 5 As shown, the measurement method includes:

[0085] Monitoring a characteristic value of the fluid medium flowing in the main channel 100 of the fluid transmission pipeline via the first measuring component 300;

[0086] Monitoring the flow rate of the fluid medium flowing in the bypass channel 200 of the fluid transmission pipeline via the second measurement component 400;

[0087] In the case where the characteristic of the fluid medium changes, the flow rate is corrected based on the characteristic value, and the corrected flow rate is used as the current mass flow rate of the fluid medium flowing in the fluid transmission pipeline.

[0088] In this method, the characteristic value of the fluid medium, such as the thermal conductivity of the fluid medium and the thermal diffusivity of the fluid medium, is determined by the measurement value of the first measurement component 300 and the flow rate of the fluid medium being zero. Then, the flow rate of the fluid medium flowing in the fluid transmission pipeline is corrected by using the obtained characteristic value of the fluid medium in combination with the measurement value of the second measurement component 400, and the corrected flow rate is used as the current mass flow rate of the fluid medium flowing in the fluid transmission pipeline.

[0089] In the various embodiments of the present application, if there is no special explanation and logical conflict, the terms or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships. In the present application, "at least one" means one or more, and "more" means two or more.

[0090] It is understandable that the various digital numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application. The fluid transmission pipeline and flow measurement method provided in the embodiments of the present application are introduced in detail above. The principles and implementation methods of the present application are explained in this article using specific examples. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for those of ordinary skill in the art, according to the ideas of the present application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A fluid transmission pipeline, characterized in that: The fluid transmission pipeline comprises a main channel (100) and a bypass channel (200) in fluid communication with the main channel (100), and the fluid transmission pipeline further comprises a first measuring component (300) and a second measuring component (400), wherein the first measuring component (300) is located in the main channel (100), and the second measuring component (400) is located in the bypass channel (200); The main channel (100) comprises a main fluid inlet (101), a main fluid outlet (102), and a main flow channel formed by a pipeline between the main fluid inlet (101) and the main fluid outlet (102); The bypass channel (200) comprises a bypass fluid inlet (201) and a bypass fluid outlet (202) respectively connected to the main flow channel, and a bypass flow channel (203) formed by a pipeline between the bypass fluid inlet (201) and the bypass fluid outlet (202); The first measuring component (300) is fixedly connected to the inner wall of the main flow channel, and the main extension direction of the first measuring component (300) is parallel to the flow direction of the fluid medium in the main flow channel; the first measuring component (300) comprises a main heating element (301) and at least one main temperature measuring element, and the main extension direction of the first measuring component (300) is the routing extension direction of the main heating element (301) and the main temperature measuring element; The second measuring component (400) is fixedly connected to the inner wall of the bypass flow channel (203), and the main extension direction of the second measuring component (400) is perpendicular to the flow direction of the fluid medium in the bypass flow channel (203); the second measuring component (400) comprises a bypass heating element (401), a first bypass temperature measuring element (402), and a second bypass temperature measuring element (403); the main extension direction of the second measuring component (400) is the routing extension direction of the bypass heating element (401), the first bypass temperature measuring element (402), and the second bypass temperature measuring element (403); The main flow channel comprises a baffle (103), and the baffle (103) is used to fully close the main flow channel; the first measurement component (300) is located between the baffle (103) and the bypass fluid inlet (201).

2. The fluid transmission pipeline according to claim 1, characterized in that: The first measurement component (300) and the second measurement component (400) are both thermal flow sensors.

3. The fluid transmission pipeline according to claim 1 or 2, characterized in that: The cross-sectional area of ​​the bypass flow channel (203) is smaller than the cross-sectional area of ​​the main flow channel.

4. The fluid transmission pipeline according to claim 1, characterized in that: The main flow channel comprises a fluid displacement section (104) and a fluid outlet section (105) respectively located on both sides of the baffle (103); the first measuring component (300) is located in the fluid displacement section (104); the bypass fluid inlet (201) is fluidically connected to the fluid displacement section (104); the bypass fluid outlet (202) is fluidically connected to the fluid outlet section (105); and the volume of the fluid displacement section (104) is greater than the volume of the fluid outlet section (105).

5. The fluid transmission pipeline according to claim 4, characterized in that: The distance between the baffle (103) and the bypass fluid inlet (201) is greater than the distance between the baffle (103) and the bypass fluid outlet (202).

6. The fluid transmission pipeline according to claim 5, characterized in that: The ratio of the distance between the baffle (103) and the bypass fluid inlet (201) to the distance between the baffle (103) and the bypass fluid outlet (202) is greater than 5.

7. The fluid transmission pipeline according to claim 6, characterized in that: The cross-sectional area of ​​the fluid displacement section (104) is greater than the cross-sectional area of ​​the bypass flow channel (203).

8. The fluid transmission pipeline according to claim 7, characterized in that: The ratio of the cross-sectional area of ​​the fluid displacement section (104) to the cross-sectional area of ​​the bypass channel (203) is greater than 100.

9. The fluid transmission pipeline according to claim 1, characterized in that: The first measuring component (300) abuts against the baffle (103).

10. The fluid transmission pipeline according to claim 9, characterized in that: The first measuring component (300) is located on the lower side wall of the main channel (100).

11. The fluid transmission pipeline according to claim 10, characterized in that: A filter screen is provided in the main channel (100), the filter screen is located between the main fluid inlet (101) and the bypass fluid inlet (201), and the filter screen covers the cross section of the main channel (100).

12. The fluid transmission pipeline according to claim 11, characterized in that: The distance between the second measuring component (400) and the bypass fluid inlet (201) is greater than the distance between the second measuring component (400) and the bypass fluid outlet (202).

13. The fluid transmission pipeline according to claim 1, characterized in that: The main circuit temperature measuring element is located on one side of the main circuit heating element (301).

14. The fluid transmission pipeline according to claim 1, characterized in that: The main circuit temperature measuring element comprises a first main circuit temperature measuring element (302) and a second main circuit temperature measuring element (303), and the first main circuit temperature measuring element (302) and the second main circuit temperature measuring element (303) are respectively located on two sides of the main circuit heating element (301); The first main circuit temperature measuring element (302) and the second main circuit temperature measuring element (303) are symmetrically arranged on both sides of the main circuit heating element (301); The first main circuit temperature measuring element (302) and the second main circuit temperature measuring element (303) are both temperature sensors; The main heating element (301) is a micro heat source.

15. The fluid transmission pipeline according to claim 14, characterized in that: The first measuring component (300) comprises a main fluid environment temperature measuring element (304).

16. The fluid transmission pipeline according to claim 1, characterized in that: The first bypass temperature measuring element (402) and the second bypass temperature measuring element (403) are respectively located on two sides of the bypass heating element (401).

17. The fluid transmission pipeline according to claim 1, characterized in that: The first bypass temperature measuring element (402) and the second bypass temperature measuring element (403) are symmetrically arranged on both sides of the bypass heating element (401); The first bypass temperature measuring element (402) and the second bypass temperature measuring element (403) are both temperature sensors; and the bypass heating element (401) is a micro heat source.

18. The fluid transmission pipeline according to claim 17, characterized in that: The second measuring component (400) includes a bypass fluid environment temperature measuring element (404).

19. The fluid transmission pipeline according to claim 18, characterized in that: The second measuring component (400) is located on the upper side wall of the bypass channel (200), and the bypass heating element (401), the first bypass temperature measuring element (402), the second bypass temperature measuring element (403) and the bypass fluid environment temperature measuring element (404) are all located on a side away from the side wall of the bypass channel (200).

20. A flow measurement method, applied to the fluid transmission pipeline according to any one of claims 1 to 19, characterized in that: The method comprises: Monitoring a characteristic value of a fluid medium flowing in a main channel (100) of the fluid transmission pipeline via a first measuring component (300); Monitoring the flow rate of the fluid medium flowing in the bypass channel (200) of the fluid transmission pipeline via a second measuring component (400); In the case where the characteristic of the fluid medium changes, the flow rate is corrected based on the characteristic value, and the corrected flow rate is used as the current mass flow rate of the fluid medium flowing in the fluid transmission pipeline.

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