A flow measurement probe for comprehensive integrated measurement of multiple types of data

Abstract

The present invention proposes a flow measurement probe for comprehensive integrated measurement of multi-type data, which is connected to a back-end detection module, wherein the flow measurement probe comprises a probe, and the probe comprises an irregular cavity portion and a regular cavity portion; the regular cavity portion comprises a static pressure cavity and a total pressure cavity; the end face of the total pressure cavity away from the static pressure cavity is a flow-facing face, and is provided with a total pressure air inlet; a static pressure hole is provided at the upper end of the static pressure cavity; the irregular cavity portion is arranged on a base, and is an asymmetric leaf-shaped structure with pointed ends and a thick middle; the regular cavity portion is arranged at the upper end of the irregular cavity portion, and a total pressure inner pipe and a static pressure inner pipe are respectively provided vertically downward at both ends of the irregular cavity portion, the total pressure inner pipe is located under the total pressure cavity and is connected with the total pressure air inlet and is connected with the back-end detection module through the base; the static pressure inner pipe is arranged under the static pressure cavity and is connected with the static pressure hole and is connected with the back-end detection module through the base.

Description

Technical Field

[0001] The invention belongs to the technical field of flow field measurement, and in particular relates to a flow measurement probe for comprehensive integrated measurement of multi-type data. Background Art

[0002] In the prior art, in the field of in-pipe measurement, temperature probes and pressure probes are generally separated and need to be installed separately, which expands the layout of the entire measurement. Moreover, when a temperature probe or a pressure probe is installed in a pipe, it will affect the flow field in the pipe, causing a large error in the measurement of another sensor at the rear end. Therefore, the two types of probes are generally installed in different areas and cannot be installed in the same nearby area. At the same time, they cannot be used in some precise and small application scenarios.

[0003] In the field of high-temperature and high-pressure in-pipe measurement, gas has obvious compressibility. In the field of compressible fluids, such as in the application of high-temperature and high-pressure gas pipelines in engines and power plants, there is currently no total temperature measurement probe on the market with a good recovery coefficient and short response time for in-pipe measurement. And because the differential pressure flow measurement must use the total temperature value to evaluate the compressibility and temperature of the fluid for the solution of compressible fluid flow, there is currently no available differential pressure flow measurement probe. The flow measurement of compressible fluids is very difficult and relies on other forms of complex structures. In the solution form with high installation requirements, an integrated probe with highly integrated total temperature, total pressure and static pressure is a technical gap in the industry.

[0004] The above factors will cause the installation of the entire high-temperature and high-pressure in-pipe gas flow measurement equipment to occupy a large amount of space and be very heavy, which is not conducive to system integration, lightweight and miniaturization. Summary of the invention

[0005] In response to the above-mentioned needs of the prior art and to fill the above-mentioned technical gaps in the prior art, the present invention proposes a flow measurement probe for comprehensive integrated measurement of multiple types of data. By setting an irregular cavity portion and a regular cavity portion, the total temperature, total pressure and static pressure are integrated on one probe. As a total temperature measurement probe, it has a good recovery coefficient and a short response time, and can also be used for total pressure and static pressure measurement of differential pressure flow, and can also be suitable for some narrower application scenarios.

[0006] The specific implementation contents of the present invention are as follows:

[0007] The present invention proposes a flow measurement probe for comprehensive integrated measurement of multi-type data, which is connected to a back-end detection module. The flow measurement probe includes a probe and a base installed at the bottom of the probe. The probe includes an irregular cavity part and a regular cavity part.

[0008] The regular cavity part is a bilaterally symmetrical leaf-shaped structure, including a static pressure cavity located on one side of the blade tip and a total pressure cavity located on the other side; the end surface of the total pressure cavity away from the static pressure cavity is a flow-facing surface, which is provided with a total pressure air inlet; a static pressure hole is provided at the upper end of the static pressure cavity;

[0009] The irregular cavity portion is arranged on the base, and is an asymmetric leaf-shaped structure with pointed ends and thick in the middle; the regular cavity portion is arranged at the upper end of the irregular cavity portion, and a total pressure inner pipe and a static pressure inner pipe are respectively arranged vertically downward at both ends of the irregular cavity portion, the total pressure inner pipe is located under the total pressure cavity and is connected to the total pressure air inlet and is connected to the rear-end detection module through the base; the static pressure inner pipe is arranged under the static pressure cavity and is connected to the static pressure hole and is connected to the rear-end detection module through the base;

[0010] A total temperature chamber is arranged in the middle section of the irregular cavity part, and a sensitive element partition is arranged in the total temperature chamber. The sensitive element partition is a vertical tubular structure, and has openings on the left and right sides of the sensitive element partition respectively; a temperature sensitive element is vertically arranged in the middle of the sensitive element partition, and the temperature sensitive element is connected to the rear-end detection module through a base;

[0011] The total temperature chamber is provided with a total temperature air outlet on the left side of the irregular cavity portion, and a total temperature air inlet on the right side.

[0012] In order to better realize the present invention, further, the left side of the irregular cavity portion is a circular arc structure protruding outward, the right side of the irregular cavity portion is provided with a circular arc structure protruding outward, the total temperature air inlet is provided on the circular arc structure protruding outward on the right side of the irregular cavity portion, the arc curvature of the circular arc structure on the left side of the irregular cavity portion is greater than the arc curvature of the circular arc structure on the right side, and the arc curvature at the total temperature air outlet is greater than the arc curvature at the total temperature air inlet.

[0013] In order to better implement the present invention, further, the diameter of the total temperature air inlet is larger than the diameter of the total temperature air outlet, and the diameter of the opening of the sensitive element barrier toward the total temperature air inlet is also larger than the diameter of the opening toward the total temperature air outlet.

[0014] In order to better realize the present invention, it further includes a mounting flange, the base is arranged at the upper end of the mounting flange, and the bottom of the mounting flange is provided with two pressure conduction devices respectively connected to the static pressure internal pipe and the total pressure internal pipe, and a temperature sensing joint connected to the temperature sensitive element is also provided, and the pressure conduction device and the temperature sensing joint are respectively connected to the rear-end detection module.

[0015] In order to better implement the present invention, further, the pressure transmission device is a pressure connection nozzle.

[0016] In order to better implement the present invention, further, a circle of sealing grooves is provided around the base at the upper end of the mounting flange.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] (1) Provide an integrated probe with total temperature, total pressure and static pressure, which has the advantages of high temperature resistance, miniaturization, fast time response and high measurement sensitivity; the probe has a universal total temperature, total pressure and static pressure integrated probe profile, which can be used not only for measuring fluid in pipes, but also for measuring aircraft atmospheric data. The probe also has a convenient flange installation form, which can be set to a flexible flange structure form according to actual needs;

[0019] (2) The derivative structure of the present invention can be used not only for in-pipe measurement, such as engine high-temperature and high-pressure bleed air pipelines and general hydraulic pipelines, but also for out-pipe measurement, such as aircraft atmospheric data measurement;

[0020] (3) The probe integrates the total temperature, total pressure and total temperature sensing parts, and has the advantages of high temperature resistance, miniaturization, fast time response and high measurement sensitivity, and has a wide range of applicability for flow field measurement;

[0021] (4) The probe has a very small cross-sectional area on the upstream surface, and has little effect on the original flow field in the pipeline;

[0022] (5) The probe is made of pure metal and has obvious advantages in high temperature resistance. Its total temperature measurement chamber uses pressure difference airflow for measurement, effectively avoiding blockage caused by sand and gravel particles coming from the oncoming flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the probe of the present invention;

[0024] Figure 2 It is a right side view of the probe of the present invention;

[0025] Figure 3 This is a schematic diagram of the bottom structure of the mounting flange of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the flow-on surface of the present invention;

[0027] Figure 5 It is a schematic diagram of the local structure of the total pressure air inlet of the frontal surface of the present invention;

[0028] Figure 6 It is a cross-sectional schematic diagram of the total pressure air inlet and the total pressure internal pipeline being connected to each other in the present invention;

[0029] Figure 7 It is a partial schematic diagram of the static pressure hole of the present invention;

[0030] Figure 8 It is a schematic cross-sectional view of the plane shape of the connection between the static pressure hole and the static pressure inner pipe of the present invention;

[0031] Fig. 9 It is a schematic cross-sectional diagram of the plane shape of the irregular cavity portion of the present invention;

[0032] Fig.10 It is a schematic diagram of the shape of the regular cavity portion of the present invention.

[0033] Wherein: 1. Probe, 2. Static pressure chamber, 3. Total pressure chamber, 5. Sealing groove, 6. Mounting flange, 7. Pressure take-off nozzle, 8. Total pressure air inlet, 9. Total pressure inner pipe, 10. Static pressure hole, 11. Static pressure inner pipe, 12. Total temperature air inlet, 13. Total temperature chamber, 14. Sensitive element interlayer, 15. Temperature sensitive element, 16. Total temperature air outlet, 17. Regular cavity part, 18. Irregular cavity part, 19. Base, 20. Temperature sensing joint. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be understood that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, and therefore should not be regarded as limiting the scope of protection. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "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 or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Embodiment 1:

[0037] The present invention proposes a flow measurement probe for comprehensive integrated measurement of multi-type data, which is connected to a back-end detection module. The flow measurement probe includes a probe 1 and a base 19 installed at the bottom of the probe. The probe 1 includes an irregular cavity part 18 and a regular cavity part 17;

[0038] The regular cavity portion 17 is a bilaterally symmetrical leaf-shaped structure, including a static pressure cavity 2 located on one side of the blade tip and a total pressure cavity 3 located on the other side; the end surface of the total pressure cavity 3 away from the static pressure cavity 2 is a frontal surface, and is provided with a total pressure air inlet 8; a static pressure hole 10 is provided at the upper end of the static pressure cavity 2;

[0039] The irregular cavity portion 18 is arranged on the base 19, and is an asymmetric leaf-shaped structure with pointed ends and thick in the middle; the regular cavity portion 17 is arranged at the upper end of the irregular cavity portion 18, and a total pressure inner pipe 9 and a static pressure inner pipe 11 are respectively arranged vertically downward at both ends of the irregular cavity portion 18, the total pressure inner pipe 9 is located under the total pressure cavity 3 and is connected to the total pressure air inlet 8 and is connected to the rear-end detection module through the base 19; the static pressure inner pipe 11 is arranged under the static pressure cavity 2 and is connected to the static pressure hole 10 and is connected to the rear-end detection module through the base 19;

[0040] A total temperature chamber 13 is provided in the middle section of the irregular cavity portion 18, and a sensitive element partition 14 is provided in the total temperature chamber 13. The sensitive element partition 14 is a vertical tubular structure, and has openings on the left and right sides of the sensitive element partition 14 respectively; a temperature sensitive element 15 is vertically provided in the middle of the sensitive element partition 14, and the temperature sensitive element 15 is connected to the rear-end detection module through a base 19;

[0041] The total temperature chamber 13 is provided with a total temperature air outlet 16 on the left side of the irregular cavity portion 18 , and a total temperature air inlet 12 on the right side.

[0042] Working principle: The probe 1 is divided into two parts fixedly connected in an upper and lower part, the lower part is an irregular cavity part 18 for measuring total temperature, and the upper part is a regular cavity part 17 for measuring total pressure and static pressure. The measurement of total pressure is achieved by arranging a total pressure air inlet 8 and a total pressure inner pipe 9 perpendicular to the incoming flow on the frontal surface, and the measurement of static pressure is achieved by arranging a static pressure hole 10 and a static pressure inner pipe 11 on the top surface of the probe. The total pressure inner pipe 9 and the static pressure inner pipe 11 are respectively connected to two pressure pipe nozzles 7, so as to facilitate pressure conduction and pipeline docking with the back-end detection module of the next level. The total temperature is achieved by the pressure difference generated by the airflow flowing through the irregular cavity part 18. Due to the different pressures on both sides of the irregular cavity part 18, the airflow flows from the total temperature air inlet 12 to the total temperature air outlet 16. Due to the obstruction of the temperature sensitive element 15 and the sensitive element barrier layer 14, the airflow is blocked in the total temperature chamber 13, and the airflow is guaranteed to have a certain flow, thereby achieving a good temperature response. It should be noted that the back-end detection module can be any device as long as it includes a device that can be connected to the total pressure internal pipe 9 and the static pressure internal pipe 11 respectively and transmit the pressure to the sensing detection end for pressure detection. Since it is a prior art, it will not be described in detail.

[0043] Embodiment 2:

[0044] This embodiment is based on the above-mentioned Embodiment 1. In order to better realize the present invention, further, the left side of the irregular cavity portion 18 is an arc structure protruding outward, the right side of the irregular cavity portion 18 is provided with an arc structure protruding outward, the total temperature air inlet 12 is provided on the arc structure protruding outward on the right side of the irregular cavity portion 18, the arc curvature of the arc structure on the left side of the irregular cavity portion 18 is greater than the arc curvature of the arc structure on the right side, and the arc curvature at the total temperature air outlet 16 is greater than the arc curvature at the total temperature air inlet 12.

[0045] Working principle: Setting the curvature of the arc can reduce the obstruction of the fluid and reduce the measurement error. The difference in arc can bring about pressure difference, thereby ensuring the flow direction of the total temperature air inlet 12 in one direction and the total temperature air outlet 16 out in one direction.

[0046] The other parts of this embodiment are the same as those of the above-mentioned embodiment 1, and thus will not be described in detail.

[0047] Embodiment 3:

[0048] This embodiment is based on any one of the above embodiments 1-2. In order to better realize the present invention, further, the diameter of the total temperature air inlet 12 is larger than the diameter of the total temperature air outlet 16, and the diameter of the opening of the sensitive element barrier 14 facing the total temperature air inlet 12 is also larger than the diameter of the opening facing the total temperature air outlet 16.

[0049] Working principle: The curvature of the arc at the total temperature air outlet 16 is greater than the curvature of the arc at the total temperature air inlet 12 so that a pressure difference is further generated to ensure that gas flows in from the total temperature air inlet 12 .

[0050] The other parts of this embodiment are the same as any of the above embodiments 1-2, so they are not repeated here.

[0051] Embodiment 4:

[0052] Based on any one of the above embodiments 1-3, in order to better realize the present invention, this embodiment further includes a mounting flange 6, the base 19 is arranged at the upper end of the mounting flange 6, and the bottom of the mounting flange 6 is provided with two pressure conduction devices connected to the static pressure inner pipe 11 and the total pressure inner pipe 9 respectively, and a temperature sensing joint 20 connected to the temperature sensitive element is also provided, and the pressure conduction device and the temperature sensing joint 20 are respectively connected to the back-end detection module.

[0053] The pressure transmission device is a pressure connection nozzle 7.

[0054] Working principle: The mounting flange 6 can make the probe 1 and the base 19 more convenient to install in various measurement environments.

[0055] The other parts of this embodiment are the same as any one of the above embodiments 1-3, so they are not repeated here.

[0056] Embodiment 5:

[0057] In this embodiment, based on any one of the above embodiments 1-4, in order to better realize the present invention, a sealing groove 5 is further provided around the base 19 at the upper end of the mounting flange 6 .

[0058] Working principle: A sealing groove 5 is provided on the mounting flange 6 so that the mounting flange 6 can be sealed with a pipeline through the sealing groove 6 .

[0059] The other parts of this embodiment are the same as any one of the above embodiments 1-4, so they are not repeated here.

[0060] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A flow measurement probe for comprehensive integrated measurement of multi-type data, connected to a back-end detection module, characterized in that: It comprises a probe (1) and a base (19) mounted at the bottom of the probe, wherein the probe (1) comprises an irregular cavity portion (18) and a regular cavity portion (17); The regular cavity portion (17) is a bilaterally symmetrical leaf-shaped structure, comprising a static pressure cavity (2) located on one side of the blade tip and a total pressure cavity (3) located on the other side; an end surface of the total pressure cavity (3) away from the static pressure cavity (2) is a flow-facing surface, provided with a total pressure air inlet (8); a static pressure hole (10) is provided at the upper end of the static pressure cavity (2); The irregular cavity portion (18) is arranged on the base (19) and is an asymmetric leaf-shaped structure with pointed ends and a thick middle. The regular cavity portion (17) is arranged at the upper end of the irregular cavity portion (18). A total pressure inner pipe (9) and a static pressure inner pipe (11) are respectively arranged vertically downward at both ends of the irregular cavity portion (18). The total pressure inner pipe (9) is located below the total pressure cavity (3) and is connected to the total pressure air inlet (8) and is connected to the rear-end detection module through the base (19). The static pressure inner pipe (11) is arranged below the static pressure cavity (2) and is connected to the static pressure hole (10) and is connected to the rear-end detection module through the base (19). A total temperature chamber (13) is arranged in the middle section of the irregular cavity portion (18), and a sensitive element partition (14) is arranged in the total temperature chamber (13); the sensitive element partition (14) is a vertical tubular structure, and has openings on the left and right sides of the sensitive element partition (14); a temperature sensitive element (15) is vertically arranged in the middle of the sensitive element partition (14), and the temperature sensitive element (15) is connected to a rear-end detection module via a base (19); The total temperature chamber (13) is provided with a total temperature air outlet (16) on the left side of the irregular cavity portion (18), and a total temperature air inlet (12) on the right side; It also includes a mounting flange (6), the base (19) being arranged at the upper end of the mounting flange (6), the bottom of the mounting flange (6) being provided with two pressure conduction devices respectively connected to the static pressure inner pipe (11) and the total pressure inner pipe (9), and a temperature sensing joint (20) connected to a temperature sensitive element, the pressure conduction device and the temperature sensing joint (20) being respectively connected to a rear-end detection module; The pressure transmission device is a pressure receiving nozzle (7); A sealing groove (5) is provided around the base (19) at the upper end of the mounting flange (6).

2. A flow measurement probe for comprehensive integrated measurement of multi-type data as claimed in claim 1, characterized in that: The left side of the irregular cavity portion (18) is an outwardly protruding arc structure, the right side of the irregular cavity portion (18) is provided with an outwardly protruding arc structure, the total temperature air inlet (12) is provided on the outwardly protruding arc structure on the right side of the irregular cavity portion (18), the arc curvature of the arc structure on the left side of the irregular cavity portion (18) is greater than the arc curvature of the arc structure on the right side, and the arc curvature at the total temperature air outlet (16) is greater than the arc curvature at the total temperature air inlet (12).

3. A flow measurement probe for comprehensive integrated measurement of multi-type data as claimed in claim 2, characterized in that: The caliber of the total temperature air inlet (12) is larger than the caliber of the total temperature air outlet (16), and the caliber of the opening of the sensitive element barrier (14) facing the total temperature air inlet (12) is also larger than the caliber of the opening facing the total temperature air outlet (16).

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