CN212031526U

CN212031526U - L-shaped pitot tube capable of being straightened

Info

Publication number: CN212031526U
Application number: CN202020958656.5U
Authority: CN
Inventors: 穆延非; 史绍平; 王绍民; 张波; 闫姝
Original assignee: Huaneng Clean Energy Research Institute; China Huaneng Group Co Ltd
Current assignee: Huaneng Clean Energy Research Institute; China Huaneng Group Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-11-27
Anticipated expiration: 2030-05-29

Abstract

The utility model provides a straighten L-shaped pitot tube, which comprises a horizontal tube section and a vertical tube section, wherein one end of the horizontal tube section is flexibly connected with one end of the vertical tube section to form a straighten L-shaped structure; when the connecting pipe is too long or the area of the measuring hand hole is too small, the pitot tube is adjusted to be in a 1-shaped structure, and when a normal test experiment is carried out, the pitot tube is reset to be in an L shape, so that the measurement of the total pressure and the static pressure of the airflow is completed. Therefore the utility model discloses can solve well when taking over the overlength or measuring hand hole area when too little, the unable problem of measuring the velocity of flow in inserting the pipeline through measuring hand hole of L type pitot tube.

Description

L-shaped pitot tube capable of being straightened

Technical Field

The utility model relates to a test field of wind speed, amount of wind in the pipeline, concretely relates to L type pitot tube that can stretch straight.

Background

A pitot tube is a tubular device that measures the total pressure and static pressure of an airflow to determine the velocity of the airflow. In the fields of scientific research, production, teaching, environmental protection, energy chemical engineering and the like, a pitot tube is commonly used for measuring the total pressure and the static pressure in a pipeline and a flue of a furnace cellar so as to calculate the wind speed, and the wind volume in the pipeline is determined by measuring methods such as grid drawing and the like. The device has reliable theoretical basis, convenient use and higher measurement precision, and is a classical and wide wind speed measurement method. The L-shaped pitot tube is also called a standard pitot tube and is formed by concentrically sleeving two tubes with different inner diameters, the concentric tubes are bent by 90 degrees at a certain position close to the head, namely, an end pipe section and a straight pipe section are in an L shape, the tail end of an inner tube is a total pressure tube, and the tail end of an outer tube is a static pressure tube.

In general, the measuring hand hole on the outer wall of the pipeline is in the form of a pipe connecting flange. The flow velocity in the pipeline is measured by utilizing the L-shaped pitot tube, and if the area of the measuring hand hole is too small or the connecting pipe is too long, the situation that the measuring hand hole cannot be inserted into the pipeline often occurs.

Disclosure of Invention

The utility model provides a pair of but L type pitot tube of straight has solved when measuring hand hole area undersize or takeover overlength, and current L type pitot tube can't insert the problem of measuring the velocity of flow in the pipeline through measuring the hand hole.

In order to achieve the above purpose, the utility model discloses a technical scheme is:

the utility model provides a pair of but L type pitot tube of straightening, including horizontal pipe section and vertical pipe section, be the flexonics between the one end of horizontal pipe section and the one end of vertical pipe section, form the L type structure that can straighten.

Preferably, the horizontal pipe section comprises a first outer pipe and a first inner pipe, and the first outer pipe is sleeved on the first inner pipe;

the vertical pipe section comprises a second outer pipe and a second inner pipe, and the second outer pipe is sleeved on the second inner pipe;

the first outer pipe and the second outer pipe are flexibly connected to form a L-shaped structure which can be straightened;

the first inner tube and the second inner tube are flexibly connected to form a L-shaped structure which can be straightened.

Preferably, the silicone tube comprises a first silicone tube outer tube and a second silicone tube outer tube, and the diameter of the first silicone tube outer tube is smaller than that of the second silicone tube outer tube; the second silicone tube outer tube is used for connecting the two outer tubes of the horizontal tube section and the vertical tube section; the first silicone tube outer tube is used for connecting the two inner tubes of the horizontal tube section and the vertical tube section.

Preferably, springs are embedded in the tube walls of the first silicone tube outer tube and the second silicone tube outer tube.

Preferably, a connecting rod sliding block mechanism for controlling the angle change range between the horizontal pipe section and the vertical pipe section to be 90-180 degrees is further arranged between the horizontal pipe section and the vertical pipe section.

Preferably, the connecting rod sliding block mechanism comprises a base, a connecting rod body, a sliding block and a sliding rail, wherein the base is installed on the outer pipe of the horizontal pipe section, and the connecting rod body is installed on the base and is hinged with the base;

the slide rail is arranged on the outer pipe of the vertical pipe section, and the slide block is arranged on the slide rail in a matching way; meanwhile, the free end of the connecting rod body is fixed on the sliding block.

Preferably, two ends of the sliding rail are provided with limiting devices.

Preferably, a return spring is installed at one end part of the slide rail, which is far away from the base, and the other end of the return spring is fixed on the outer pipe of the vertical pipe section.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a pair of but L type pitot tube of straightening owing to can make L type pitot tube flexibility be "1" style of calligraphy or "L" style of calligraphy, when taking over overlength or measuring hand hole area when too little, adjusts the pitot tube into "1" style of calligraphy structure, and when normal test experiment, the pitot tube resets to "L" font, accomplishes the air current and presses the measurement of pressure and static pressure altogether. Therefore the utility model discloses can solve well when taking over the overlength or measuring hand hole area when too little, the unable problem of measuring the velocity of flow in inserting the pipeline through measuring hand hole of L type pitot tube.

Drawings

Fig. 1 is a schematic structural diagram of an L-shaped pitot tube provided by the present invention in a normal operating state;

fig. 2 is a schematic structural diagram of an L-shaped pitot tube provided by the present invention in an abnormal working state;

fig. 3 is a schematic structural view of a silicone tube.

Detailed Description

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 pair of L type pitot tube that can stretch straight, including the pitot tube body, the pitot tube body includes horizontal pipeline section and vertical pipeline section, be flexible connection between the one end of horizontal pipeline section and the one end of vertical pipeline section, form the L type structure that can straighten.

The horizontal pipe section comprises a first outer pipe 1 and a first inner pipe 2, and the first outer pipe 1 is sleeved on the first inner pipe 2.

The vertical pipe section comprises a second outer pipe 4 and a second inner pipe 3, and the second outer pipe 4 is sleeved on the second inner pipe 3.

The first outer tube 1 and the second outer tube 4 are flexibly connected to form an L-shaped structure which can be straightened.

The first inner tube 2 and the second inner tube 3 are flexibly connected to form a L-shaped structure which can be straightened.

And the joint between the horizontal pipe section and the vertical pipe section is connected through a silicone tube.

The silicone tube includes first silicone tube outer tube 5 and second silicone tube outer tube 6, the diameter of first silicone tube outer tube 5 is less than the diameter of second silicone tube

outer tube

6, and 6 suits of second silicone tube outer tube are on first silicone tube outer tube 5, and first silicone tube outer tube 5 and second silicone tube outer tube 6 are arranged with one heart.

The first outer tube 1 and the second outer tube 4 are connected through a second silicone tube outer tube 6.

The first inner tube 2 and the second inner tube 3 are connected through a first silicone tube outer tube 5.

The first silicone tube outer tube 5 and the second silicone tube outer tube 6 have high elasticity, so that the inner tube and the outer tube are sleeved with the silicone tube outer tubes, and good tightness can be kept.

And a connecting rod sliding block mechanism 7 is also arranged between the horizontal pipe section and the vertical pipe section and is used for controlling the angle change between the horizontal pipe section and the vertical pipe section, so that the angle change range between the horizontal pipe section and the vertical pipe section is 90-180 degrees.

The connecting rod sliding block mechanism 7 comprises a base, a connecting rod body, a sliding block and a sliding rail, wherein the base is installed on the side wall of the first outer pipe 1, and the connecting rod body is installed on the base and is hinged to the base.

The slide rail is installed on second outer pipe 4, the slider cooperation is installed on the slide rail.

Meanwhile, the free end of the connecting rod body is fixed on the sliding block.

When the sliding block moves upwards, the angle between the horizontal pipe section and the vertical pipe section is increased; when the slide block moves downwards, the angle between the horizontal pipe section and the vertical pipe section becomes smaller.

The two ends of the slide rail are provided with limiting devices 9, and due to the existence of the limiting devices 9, the change range of the angle between the horizontal pipe section and the vertical pipe section is 90-180 degrees.

The slide rail is kept away from the one end tip of base and is installed reset spring 8, reset spring 8's the other end is fixed on the lateral wall of second outer tube 4.

As can be seen from fig. 1, in a normal test state, the slide block is under the tension of the return spring 8, so that the silicone tube is bent, and a 90-degree position is maintained between the horizontal tube section and the vertical tube section.

As can be seen from fig. 2, in the process of going deep into the pipeline measuring hand hole, the horizontal pipe section can be moved to form an angle of 180 degrees with the vertical pipe section, so that the horizontal pipe section can conveniently go deep into the measured pipe section.

Due to the design of the return spring 8, the angle between the horizontal pipe section and the vertical pipe section is 90 degrees under the condition of no external force.

As shown in fig. 3, springs 10 are embedded in the tube walls of the first silicone tube outer tube 5 and the second silicone tube outer tube 6, and mainly function to prevent the tube walls from deforming in a bent state of the silicone tube, and the measurement accuracy is affected by the fit between the inner tube wall and the outer tube wall of the wall surface.

Claims

1. The L-shaped pitot tube capable of being straightened is characterized by comprising a horizontal tube section and a vertical tube section, wherein one end of the horizontal tube section is flexibly connected with one end of the vertical tube section to form an L-shaped structure capable of being straightened.

2. The L-shaped, unbendable pitot tube of claim 1, characterized in that said horizontal section comprises a first outer tube (1) and a first inner tube (2), said first outer tube (1) being fitted over said first inner tube (2);

the vertical pipe section comprises a second outer pipe (4) and a second inner pipe (3), and the second outer pipe (4) is sleeved on the second inner pipe (3);

the first outer pipe (1) and the second outer pipe (4) are flexibly connected to form a L-shaped structure which can be straightened;

the first inner tube (2) and the second inner tube (3) are flexibly connected to form a L-shaped structure which can be straightened.

3. The L-shaped rubber-tube capable of being straightened according to claim 1, wherein the horizontal tube section and the vertical tube section are connected through a silicone tube, the silicone tube comprises a first silicone tube outer tube (5) and a second silicone tube outer tube (6), and the diameter of the first silicone tube outer tube (5) is smaller than that of the second silicone tube outer tube (6); the second silicone tube outer tube (6) is used for connecting two outer tubes of the horizontal tube section and the vertical tube section; the first silicone tube outer tube (5) is used for connecting the two inner tubes of the horizontal tube section and the vertical tube section.

4. The L-shaped rubber-tube capable of being straightened according to claim 3, wherein the walls of the first silicone tube outer tube (5) and the second silicone tube outer tube (6) are embedded with springs (10).

5. The L-shaped pitot tube capable of being straightened according to claim 1, characterized in that a connecting rod and slider mechanism (7) for controlling the angle change range between the horizontal tube section and the vertical tube section to be 90-180 degrees is further arranged between the horizontal tube section and the vertical tube section.

6. The straightenable L-shaped pitot tube according to claim 5, characterized in that the link-slider mechanism (7) comprises a base, a link body, a slider and a slide rail, wherein the base is installed on the outer tube of the horizontal tube section, and the link body is installed on the base and is hinged with the base;

7. The L-shaped supporting tube capable of being straightened according to claim 6, wherein the two ends of the sliding rail are provided with limiting devices (9).

8. The L-shaped rubber tube capable of being straightened out as claimed in claim 6, wherein a return spring (8) is mounted at one end of the slide rail far away from the base, and the other end of the return spring (8) is fixed on the outer tube of the vertical tube section.