CN214150780U

CN214150780U - Novel five-hole probe

Info

Publication number: CN214150780U
Application number: CN202022961615.4U
Authority: CN
Inventors: 陈婧; 李长松; 冯岩岩
Original assignee: Shijiazhuang Zhili Engineering Technology Co ltd
Current assignee: Shijiazhuang Zhili Engineering Technology Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-09-07
Anticipated expiration: 2030-12-10

Abstract

The utility model belongs to the technical field of fluid velocity measurement, it is five-hole probe of new-type design. Including the pressure pipe and defeated pressure passageway, the pressure pipe left end comprises oval inductive head and last effective threaded connection of connecting, and oval inductive head tip has 5 to press the hole altogether, it is connected with lower connecting pipe to go up the connecting pipe, leaves 0.2mm left right side circumference gap between two pipes and constitutes the static pressure mouth, defeated pressure passageway comprises static pressure passageway and total pressure passageway, and wherein the static pressure pipe is connected with the static pressure mouth and constitutes the static pressure passageway, presses the pipe altogether and presses the hole connection to constitute total pressure passageway, and presses pipe and static pressure pipe to pass the pressure pipe hole altogether, visits out after tail end supporting shoe position fixes. This novel five-hole probe inductive head oval design and whole pressure acquisition channel design have realized the more accurate transmission to each pressure, have improved the measurement accuracy of five-hole probe.

Description

Novel five-hole probe

Technical Field

The utility model relates to a technical field is measured to the fluid speed, specifically indicates a novel five-hole probe.

Background

The five-hole probe is a device for measuring the total pressure and the static pressure of a fluid and calculating the flow speed and the direction of the measured fluid by using the pressure difference. The method has the advantages of simple measuring principle, convenient use and maintenance and the like, and is still one of the main means for measuring the three-dimensional flow field at present. At present, a five-hole probe is mostly a hemispherical head, and total pressure is collected through 5 holes distributed on the hemispherical head; the static pressure is collected through static pressure holes uniformly distributed on the side wall. Theoretically, the more static pressure holes, the less sensitive to direction, and the larger static pressure cavity, the less sensitive to air pressure and airflow change.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to solve among the above-mentioned background art current device in the acquisition process of pressure, total pressure is great because of hemispherical head shape fluctuation range, and the static pressure chamber is great to incoming flow pressure, the insensitive and static pressure pore pair direction of velocity of flow change and the sensitive problem that influences probe measurement performance, provides a novel five-hole probe.

In order to solve the technical problem, the utility model provides a technical scheme does: a novel five-hole probe comprises a pressure sampling pipe and a pressure conveying channel, wherein the left end of the pressure sampling pipe is an oval induction head, and the left end part of the oval induction head is provided with a total pressure hole I, a total pressure hole II, a total pressure hole III, a total pressure hole IV and a total pressure hole V, the right end of the oval induction head is connected with an upper connecting pipe, the upper connecting pipe is connected with a lower connecting pipe, a static pressure port is formed by a left-mm circumferential gap between the two pipes, the pressure conveying channel comprises a static pressure channel formed by connecting a static pressure pipe and a static pressure port, and a total pressure channel formed by respectively connecting a total pressure pipe five, a total pressure pipe four, a total pressure pipe three, a total pressure pipe two and a total pressure pipe one with a total pressure hole one, a total pressure hole two, a total pressure hole three, a total pressure hole four and a total pressure hole five, and the total pressure pipe five, the total pressure pipe four, the total pressure pipe three, the total pressure pipe two, the total pressure pipe one and the static pressure pipe pass through the inner hole of the pressure production pipe and are extended out after being fixed by the position of the tail end supporting block.

Preferably, the shape of the induction head is designed to be oval, and the oval induction head is coaxially positioned and connected with the upper connecting pipe through threads.

Preferably, the upper connecting pipe is in threaded connection with the lower connecting pipe, and a 0.2mm circumferential gap is reserved in the middle of the upper connecting pipe and the lower connecting pipe after the upper connecting pipe and the lower connecting pipe are connected to serve as a static pressure port.

Preferably, the pressure conveying channel is formed by connecting a total pressure pipe five, a total pressure pipe four, a total pressure pipe three, a total pressure pipe two, a total pressure pipe one, a total pressure hole two, a total pressure hole three, a total pressure hole four and a total pressure hole five and connecting the static pressure pipe and the static pressure port.

Compared with the prior art, the utility model the advantage lie in: 1. a circumferential gap formed by connecting the upper connecting pipe and the lower connecting pipe is used as a static pressure port, so that the sensitivity to the direction in the measuring process is reduced. 2. The connection of the upper connecting pipe and the lower connecting pipe realizes the purpose of improving the precision of the five-hole probe by reducing the volume of the static pressure bin. 3. The combined channel design of the total pressure pipeline and the static pressure pipeline realizes more accurate transmission of each pressure.

Drawings

Fig. 1 is a schematic structural diagram of a front view section of the present invention.

As shown in the figure: 1. a pressure sampling pipe; 2. a pressure delivery channel; 3. a first total pressure hole; 4. a second total pressure hole; 5. total pressure hole three; 6. total pressure hole four; 7. a fifth total pressure hole; 8. an inductive head; 9. an upper connecting pipe; 10. a static pressure port; 11. a lower connecting pipe; 12. a support block; 13. a static pressure tube; 14. a total pressure pipe five; 15. a total pressure pipe IV; 16. a third total pressure pipe; 17. a second total pressure pipe; 18. and (4) a total pressure pipe is one.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a technical solution: a novel design five-hole probe structure comprises a pressure sampling pipe 1; 2. a pressure delivery channel; 3. a first total pressure hole; 4. a second total pressure hole; 5. total pressure hole three; 6, total pressure hole four; 7. a fifth total pressure hole; 8. An inductive head; 9. an upper connecting pipe; 10. a static pressure port; 11. a lower connecting pipe; 12. a support block; 13. a static pressure tube; 14. a total pressure pipe five; 15. a total pressure pipe IV; 16. a third total pressure pipe; 17. a second total pressure pipe; 18. and (4) a total pressure pipe is one. The left end of the pressure sampling pipe 1 is an oval induction head 8, the left end portion of the oval induction head 8 is provided with a total pressure hole 3-7, the right end of the oval induction head 8 is connected with an upper connecting pipe 9, the induction head is designed in an oval shape and connected with the upper connecting pipe in a high-precision coaxial mode, the oval design is more accurate when pressure data are collected, and the thread coaxial connection guarantees the coaxiality of two parts and enables the installation to be more convenient.

The upper connecting pipe 9 is connected with the lower connecting pipe 11, and a 0.2mm circumferential gap is reserved between the two pipes to form a static pressure port 10. Go up the connecting pipe and adopt threaded connection and the middle 0.2mm circumference gap of reserving as the static pressure mouth with lower connecting pipe, strengthened the sensitivity to the direction in measuring, reduced the influence that the static pressure chamber caused to static pressure collection.

The pressure conveying channel 2 comprises a static pressure pipe 13 connected with a static pressure hole 10 to form a static pressure channel, total pressure pipes 14-18 are connected with total pressure holes 3-7 to form a total pressure channel, the total pressure pipes 14-18 and the static pressure pipe 10 penetrate through an inner hole of the pressure production pipe and are extended out after the position of a tail end supporting block 12 is fixed, the total pressure pipes are connected with the total pressure holes, and the static pressure pipes are connected with a static pressure port to form an acquisition channel.

The utility model solves the problem of direction sensitivity in the testing process through the static pressure port of the circumferential gap, and increases the fault-tolerant rate of the test; the design mode of the pressure input channel enables the output pressure value to be more stable and reliable, and the test precision is improved; the ellipsoid head design reduces the fluctuation range of the total pressure.

The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A novel five-hole probe is characterized in that: including adopting and pressing pipe (1) and defeated pressure passageway (2), it is oval inductive head (8) to adopt to press pipe (1) left end, and oval inductive head (8) left end portion have to press a hole (3), press a hole two (4), press a hole three (5), press a hole four (6), press a hole five (7) altogether, oval inductive head (8) right-hand member is connected with last connecting pipe (9), go up connecting pipe (9) and be connected with lower connecting pipe (11), leave between two pipes that 0.2mm controls the circumference gap and constitute static pressure mouth (10), defeated pressure passageway (2) include, the static pressure passageway that static pressure pipe (13) and static pressure mouth (10) are connected to form, press a pipe five (14) altogether, press a pipe four (15) altogether, press a pipe three (16), press a pipe two (17), press a pipe (18) respectively with press a hole (3), press a hole two (4), press a hole three (5), press, And the total pressure channel is formed by connecting a total pressure hole four (6) and a total pressure hole five (7), and a total pressure pipe five (14), a total pressure pipe four (15), a total pressure pipe three (16), a total pressure pipe two (17), a total pressure pipe one (18) and the static pressure pipe (13) penetrate through the inner hole of the mining pressure pipe and are extended out after the position of the tail end supporting block (12) is fixed.

2. The novel five-well probe according to claim 1, characterized in that: the shape of the induction head (8) is designed to be oval, and the oval induction head (8) and the upper connecting pipe (9) are coaxially positioned and connected through threads.

3. The novel five-well probe according to claim 1, characterized in that: the upper connecting pipe (9) is connected with the lower connecting pipe (11) through threads, and a 0.2mm circumferential gap is reserved in the middle of the upper connecting pipe (9) and the lower connecting pipe (11) after the upper connecting pipe is connected with the lower connecting pipe as a static pressure port (10).

4. The novel five-well probe according to claim 1, characterized in that: the pressure transmission channel (2) is formed by connecting a total pressure pipe five (14), a total pressure pipe four (15), a total pressure pipe three (16), a total pressure pipe two (17), a total pressure pipe one (18), a total pressure hole one (3), a total pressure hole two (4), a total pressure hole three (5), a total pressure hole four (6) and a total pressure hole five (7) and connecting a static pressure pipe (13) and a static pressure port (10).