A movable flange type pitot tube with a gas extraction tube

Abstract

The utility model discloses a movable flange type pitot tube with a gas extraction tube, which relates to the field of pitot tubes, and includes an outer tube and a backrest type speed measuring tube fixedly arranged in the outer tube, wherein a flange hardware is sleeved on the outer side surface of the outer tube, the flange hardware is slidably connected to the outer tube, and a locking bolt locked with the outer tube is installed on the side of the flange hardware, and a flange is arranged on the upper end surface of the flange hardware, and the flange hardware is fixedly connected to the flange. The utility model arranges a movable and adjustable flange hardware on the outer tube, and then fixes and installs the flange through the flange hardware. When it is easy to use, the position of the flange on the outer tube can be adjusted through the flange hardware, thereby flexibly adjusting the installation depth of the pitot tube, and by fixing and installing a sampling tube on the flange, gas can be extracted through the sampling tube for sampling when it is easy to use.

Description

Technical Field

[0001] The utility model relates to the technical field of pitot tubes, in particular to a movable flange type pitot tube with a gas extraction tube. Background Art

[0002] The Pitot tube is the earliest and most widely used pneumatic flow rate sensing device. Due to its simple structure and easy use, it has been widely used in industrial processes, especially in the measurement of large duct air volume and flue gas volume. When using the Pitot tube, the full pressure hole is required to face the airflow, the back pressure hole is required to face the back direction of the airflow, and the probe axis is parallel to the airflow direction.

[0003] The existing Chinese patent with announcement number CN203535069U discloses a combined pitot tube, which includes a backrest-type speed measuring tube and an outlet pipe connected to it. The backrest-type speed measuring tube is clamped in the head connector and extends at both ends. The two ends of the head connector are provided with external threads. A protective cover is screwed on one end to cover the head of the backrest-type speed measuring tube. An extension tube is screwed on the other end to cover the tail of the backrest-type speed measuring tube. An end cap is screwed on the other end of the extension tube. The outlet pipe is clamped in the end cap. The outlet pipe is connected to the backrest-type speed measuring tube through a silicone tube.

[0004] Regarding the above-mentioned related technologies, it was found that the existing Pitot tube can only measure the gas flow inside the chimney. When conventional humidity and oxygen measurements are required, it is necessary to drill holes separately. This is not only cumbersome to operate, but also increases the installation cost accordingly. At the same time, the traditional Pitot tube cannot adjust the installation depth. Utility Model Content

[0005] The present application provides a movable flange type pitot tube with a gas extraction tube, which is used to solve the problems raised in the background technology.

[0006] The utility model is achieved in this way:

[0007] A movable flange-type pitot tube with a gas extraction tube includes an outer tube and a backrest-type velocity measuring tube fixedly arranged in the outer tube. A flange hardware is sleeved on the outer side surface of the outer tube, the flange hardware is slidably connected to the outer tube, and a locking bolt locked to the outer tube is installed on the side of the flange hardware. A flange plate is provided on the upper end surface of the flange hardware, and the flange hardware is fixedly connected to the flange plate. A sampling tube is also installed on the flange plate, and the sampling tube is fixedly connected to the flange plate.

[0008] Furthermore, a threaded hole for installing a locking bolt is provided on the side of the flange.

[0009] Furthermore, the upper end surface of the flange is provided with two screw holes, and the screw holes are symmetrically arranged on the upper end surface of the flange.

[0010] Furthermore, a sleeve hole is provided at the center of the flange, and a positioning screw hole for installing a sampling tube is also provided on the upper end surface of the flange.

[0011] Furthermore, the flange is provided with connecting holes corresponding to the screw holes, and the connecting holes pass through the upper and lower ends of the flange.

[0012] Furthermore, the sampling tube includes a top tube portion and a spiral tube portion that matches the positioning screw hole, and the spiral tube portion is integrally formed and arranged at the lower end of the top tube portion.

[0013] Furthermore, an extraction head is sealed and installed at the lower end of the spiral tube part, and a control valve is provided in the extraction head.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides an outer tube with a movable and adjustable flange fastener, and then fixes and installs the flange plate through the flange fastener. When it is easy to use, the position of the flange plate on the outer tube can be adjusted through the flange fastener, thereby flexibly adjusting the installation depth of the pitot tube. Moreover, by fixing the sampling tube on the flange plate, gas can be extracted for sampling through the sampling tube when it is easy to use, and the humidity and oxygen measurement function can be easily realized. The present invention has the advantages of easy use and flexible installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 It is a three-dimensional diagram of the flange fastener in the embodiment of the present utility model;

[0018] Figure 3 yes Figure 1 The schematic diagram of the structure of the sampling tube shown;

[0019] Figure 4 yes Figure 1 A perspective view of the flange shown;

[0020] Figure 5 yes Figure 4 Top view of the device shown.

[0021] In the figure: 1. Outer tube; 2. Back-type velocity measuring tube; 3. Flange fastener; 31. Threaded hole; 32. Screw hole; 4. Flange; 41. Sleeve hole; 42. Positioning screw hole; 43. Connecting hole; 5. Sampling tube; 51. Top tube part; 52. Screw tube part; 521. Extraction head; 6. Locking bolt. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0023] Reference Figure 1 、 Figure 2 and Figure 3 As shown, a movable flange-type pitot tube with a gas extraction tube includes an outer tube 1 and a backrest-type velocity measuring tube 2 fixedly arranged in the outer tube 1. A flange hardware 3 is sleeved on the outer surface of the outer tube 1, and the flange hardware 3 is slidably connected to the outer tube 1. A locking bolt 6 locked to the outer tube 1 is installed on the side of the flange hardware 3. A flange plate 4 is provided on the upper end surface of the flange hardware 3, and the flange hardware 3 is fixedly connected to the flange plate 4. A sampling tube 5 is also installed on the flange plate 4, and the sampling tube 5 is fixedly connected to the flange plate 4. The outer tube 1 is configured to facilitate the stable installation and testing of the backrest-type velocity tube 2. Furthermore, by fitting the flange fastener 3 onto the outer surface of the outer tube 1, the installation depth of the device can be adjusted by adjusting the position of the flange fastener 3 on the outer tube 1 for convenient use. After adjusting the position of the flange fastener 3, it can be fixed to the outer tube 1 via the locking bolt 6, achieving flexible adjustment and stable use. Furthermore, by fixing the flange plate 4 to the flange fastener 3, stable installation and use can be achieved. Furthermore, by installing the sampling tube 5 on the flange plate 4, extraction can be performed through the sampling tube 5 when conventional humidity and oxygen measurements are required. A threaded hole 31 is provided on the side of the flange fastener 3 for installing the locking bolt 6. Providing the threaded hole 31 on the side of the flange fastener 3 facilitates the installation of the locking bolt 6 from the outside of the flange fastener 3, allowing the head of the locking bolt 6 to be supported on the outer surface of the outer tube 1, thereby achieving mutual locking with the outer tube 1.

[0024] Reference Figure 2As shown, the upper end surface of the flange 3 is provided with two screw holes 32, and the screw holes 32 are symmetrically arranged on the upper end surface of the flange 3. By providing two screw holes 32 on the upper end surface of the flange 3, the flange 4 can be fixed to the flange 3 by bolts when it is easy to use.

[0025] Reference Figure 4 and Figure 5 As shown, a sleeve hole 41 is provided at the center of the flange 4, and a positioning screw hole 42 is provided on the upper end surface of the flange 4 for mounting the sampling tube 5. The provision of the sleeve hole 41 ensures that the flange 4 can be stably mounted on the flange 4, facilitating flexible sliding adjustment, and the provision of the positioning screw hole 42 facilitates stable mounting of the flange 4. The flange 4 is provided with connecting holes 43 corresponding to the screw holes 32, and the connecting holes 43 pass through the upper and lower ends of the flange 4. The provision of the connecting holes 43 ensures that during installation, bolts can be passed through the connecting holes 43 to connect with the screw holes 32, making it easy to fix the flange 4 and the flange hardware 3 to each other.

[0026] Reference Figure 3 As shown, the sampling tube 5 includes a top tube portion 51 and a spiral tube portion 52 that cooperates with the positioning screw hole 42. The spiral tube portion 52 is integrally formed and arranged at the lower end of the top tube portion 51. The structural setting of the sampling tube 5 ensures that the top tube portion 51 can be fixedly installed in the positioning screw hole 42 through the spiral tube portion 52 when it is installed. The lower end of the spiral tube portion 52 is sealed with an extraction head 521, and a control valve is provided in the extraction head 521. The setting of the extraction head 521 ensures stable sampling use, and the setting of the control valve makes it easy to close the sampling tube when not sampling.

[0027] Working principle: During actual installation, the position of the flange hardware 3 on the outer tube 1 can be slidably adjusted to change the installation depth of the Pitot tube. After adjusting the position of the flange hardware 3 on the outer tube 1, the locking bolt 6 can be rotated to lock it. Then, the flange plate 4 can be put on the outer tube 1 and fit on the upper end face of the flange hardware 3. Then, the bolt is passed through the connecting hole 43 to connect and fix it with the screw hole 32. In this way, the outer tube 1, the flange hardware 3 and the flange plate 4 can be assembled with each other. Finally, the sampling tube 5 can be installed in the positioning screw hole 42 of the flange plate 4. In this way, the Pitot tube can be installed and used at the position to be measured through the flange plate 4.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A movable flange type pitot tube with a gas extraction tube, comprising an outer tube (1) and a backrest type velocity measuring tube (2) fixedly arranged in the outer tube (1), characterized in that: A flange (3) is sleeved on the outer surface of the outer tube (1), the flange (3) is slidably connected to the outer tube (1), and a locking bolt (6) is installed on the side of the flange (3) to be locked with the outer tube (1). A flange plate (4) is arranged on the upper end surface of the flange (3), and the flange (3) is fixedly connected to the flange plate (4). A sampling tube (5) is also installed on the flange plate (4), and the sampling tube (5) is fixedly connected to the flange plate (4).

2. The movable flange type pitot tube with a gas extraction pipe according to claim 1, characterized in that: The side surface of the flange member (3) is provided with a threaded hole (31) for installing a locking bolt (6).

3. The movable flange type pitot tube with a gas extraction pipe according to claim 2, characterized in that: The upper end surface of the flange component (3) is provided with two screw holes (32), and the screw holes (32) are symmetrically arranged on the upper end surface of the flange component (3).

4. The movable flange type pitot tube with a gas extraction pipe according to claim 3, characterized in that: A sleeve hole (41) is provided at the center of the flange (4), and a positioning screw hole (42) for installing the sampling tube (5) is also provided on the upper end surface of the flange (4).

5. The movable flange type pitot tube with a gas extraction tube according to claim 4, characterized in that: The flange (4) is provided with a connecting hole (43) corresponding to the screw hole (32), and the connecting hole (43) passes through the upper and lower ends of the flange (4).

6. The movable flange type pitot tube with a gas extraction tube according to claim 5, characterized in that: The sampling tube (5) comprises a top tube portion (51) and a screw tube portion (52) matched with the positioning screw hole (42); the screw tube portion (52) is integrally formed and arranged at the lower end of the top tube portion (51).

7. The movable flange type pitot tube with a gas extraction pipe according to claim 6, characterized in that: An extraction head (521) is sealed and mounted on the lower end of the spiral tube portion (52), and a control valve is arranged in the extraction head (521).

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