Teflon pitot tube capable of being disassembled, assembled and adjusted

Abstract

The utility model relates to the technical field of gas flow rate detection, and discloses a teflon pitot tube capable of being disassembled and adjusted, which comprises a pitot tube, one end of the pitot tube is in threaded connection with a compression bar nut, the pitot tube and the compression bar nut are pressed and fixed on a connecting flange, and an inner cavity of the pitot tube penetrates out to be provided with a detection tube group. The pressing rod nut is matched with the pitot tube to be pressed and fixed on the connecting flange, the whole pitot tube assembly is assembled by adopting a mechanical structure, the operation stability of the pitot tube and a detection tube group in practical application can be ensured, meanwhile, daily disassembly and assembly maintenance is facilitated, and the disassembly and assembly efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas velocity detection, in particular to a detachable and adjustable tetrafluoroethylene pitot tube. Background Art

[0002] The PTFE pitot tube is installed on the temperature and pressure flow equipment to monitor the flow rate and temperature of the flue gas through the airflow direction in the chimney. At present, the stainless steel pitot tube is basically used on the market. Because the airflow it contacts is acidic and alkaline, it is easily corroded. At the same time, the PTFE pitot tube currently used in the market is basically bonded, easy to loosen, unstable in structure, easy to move under stress, affecting the test results and short service life. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the utility model provides a detachable and adjustable polytetrafluoroethylene Pitot tube, which solves the problem that the existing Pitot tube has a short daily service life and is inconvenient to disassemble, adjust and maintain the entire Pitot tube assembly.

[0005] (II) Technical solution

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A detachable and adjustable polytetrafluoroethylene pitot tube comprises a pitot tube, one end of the pitot tube is threadedly connected with a pressure rod nut, the pitot tube and the pressure rod nut are pressed and fixed on a connecting flange, and a detection tube group is installed through the inner cavity of the pitot tube.

[0008] Preferably, the inner cavities at both ends of the Pitot tube are respectively plugged with a rear cover and a front cover, and the two ends of the Pitot tube are threadedly connected to the two pressure rod nuts to squeeze and fix the rear cover and the front cover, and washers are arranged between the rear cover and the front cover and the cavity wall of the pressure rod nut.

[0009] Preferably, the detection tubes in the detection tube set are all threadedly connected and pass through the rear cover, and the detection tubes in the detection tube set are all passed through and pass through the front cover.

[0010] Preferably, positioning holes are arranged through the upper and lower tube walls of the Pitot tube, and threaded holes matching the positioning holes are provided on the front cover and the rear cover, and positioning bolts pass through the positioning holes and are threadedly connected to the threaded holes.

[0011] Preferably, a positioning column is fixedly connected to the outer wall of the lower part of the Pitot tube, and a positioning groove matching the positioning column is provided on the connecting flange.

[0012] Preferably, the detection tube group includes two high- and low-pressure transmission tubes and a temperature sensing tube, and the high- and low-pressure transmission tubes and the temperature sensing tube are fixedly assembled together by a fixing sleeve.

[0013] Preferably, a flat head is provided at one end of the high and low pressure transmission pipe, and during the detection process, the flat heads of the two high and low pressure transmission pipes are parallel up and down and perpendicular to the direction of the gas being measured.

[0014] (III) Beneficial effects

[0015] The utility model has the following beneficial effects:

[0016] The detachable and adjustable polytetrafluoroethylene Pitot tube is fixed to the connecting flange by means of a pressure rod nut in cooperation with the Pitot tube, and the entire Pitot tube assembly is assembled using a mechanical structure, which can ensure the stability of the operation of the Pitot tube and the detection tube group in actual applications, while facilitating daily disassembly and maintenance, and effectively improving the disassembly and assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the main view of the utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of the utility model when viewed from above;

[0019] Figure 3 It is a schematic diagram of the AA section and partial section structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the component disassembly structure of the utility model.

[0021] In the figure: 1. Pitot tube; 2. rear cover; 3. front cover; 4. positioning screw; 5. positioning hole; 6. connecting flange; 7. positioning groove; 8. positioning column; 9. pressure rod nut; 10. washer; 11. detection tube group; 12. fixing sleeve. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1The utility model provides a technical solution: a detachable and adjustable polytetrafluoroethylene Pitot tube 1, comprising a Pitot tube 1, one end of the Pitot tube 1 is threadedly connected with a pressure rod nut 9, the Pitot tube 1 and the pressure rod nut 9 are pressed and fixed on a connecting flange 6, and a detection tube group 11 is installed through the inner cavity of the Pitot tube 1.

[0024] The utility model uses a pressure rod nut 9 to cooperate with the Pitot tube 1 to be pressed and fixed on the connecting flange 6, and adopts a mechanical structure to assemble the entire Pitot tube 1 component, which can ensure the stability of the operation of the Pitot tube 1 and the detection tube group 11 in actual applications, and at the same time facilitate daily disassembly and maintenance, effectively improving the disassembly and assembly efficiency.

[0025] Assembly process: first put the front and rear covers 2 into the large tube cavities at the front and rear, and fix them by positioning screws 4 to prevent them from rotating. At this time, the three through holes on the front and rear covers 2 (Note: the rear cover 2 is a threaded hole, and the front cover 3 is a through hole) are corresponding to each other up and down; according to different apertures, the detection tube group 11 is passed through the fixing sleeve 12 and the front cover 3 from the front end in turn, and then screwed into the rear cover 2 by twisting. When the two high and low pressure transmission tubes with flat heads are about to be screwed to the bottom, they are adjusted by a small amount of angle to make the two The planes are parallel up and down (i.e. perpendicular to the direction of the measured airflow); then a piece of silicone flat gasket 10 is placed on the surface of the front and rear covers 2 respectively, the front end is first inserted into the pressure rod nut 9 and tightened to press the front cover 3; the rear end is first placed on the connecting flange 6 (aligned with the positioning column 8 on the Pitot tube 1), and then the pressure rod nut 9 is inserted and tightened to press the rear cover 2 and the connecting flange 6. In this way, it can be installed, and the whole process does not require any glue bonding, and the mechanical structure is assembled, which can be assembled from loose parts, can be disassembled and adjusted, is relatively fixed and will not move relatively, affecting the measurement parameters.

[0026] In this embodiment, the inner cavities at both ends of the Pitot tube 1 are respectively inserted with a rear cover 2 and a front cover 3, and the two ends of the Pitot tube 1 are threadedly connected with two pressure rod nuts 9 to squeeze and fix the rear cover 2 and the front cover 3, and washers 10 are arranged between the rear cover 2 and the front cover 3 and the cavity wall of the pressure rod nuts 9.

[0027] Reference Figure 2 and 3 As shown, in this embodiment, the detection tubes in the detection tube set 11 are all threadedly connected and pass through the rear cover 2, and the detection tubes in the detection tube set 11 are all passed through the front cover 3. By setting the rear cover 2 and the front cover 3, it is possible to ensure that the pitot tube 1 is stably limited to the detection tube set 11, and to ensure the stable operation of the entire monitoring tube set during the subsequent detection process. At the same time, it is also convenient to disassemble the detection tube set 11 by removing the extrusion nut.

[0028] Reference Figure 3 and 4As shown, in this embodiment, positioning holes 5 are arranged through the upper and lower tube walls of the pitot tube 1, and threaded holes matching the positioning holes 5 are arranged on the front cover 3 and the rear cover 2, and the positioning bolts penetrate the positioning holes 5 and are threadedly connected with the threaded holes. Through the positioning screws 4 and the positioning holes 5, the rear cover 2 and the front cover 3 can be stably limited and fixed, and after further fixing by the pressure rod nut 9, the stability of the installation of the entire rear cover 2 and the front cover 3 can be improved, thereby ensuring the stability of the detection tube group 11 installed between the covers, thereby improving the reliability of the detection tube group 11 during subsequent use.

[0029] Reference Figure 3 and 4 As shown, in this embodiment, a positioning column 8 is fixedly connected to the outer wall of the lower part of the pitot tube 1, and a positioning groove 7 matching the positioning column 8 is provided on the connecting flange 6. Through the provided positioning column 8 and positioning groove 7, the installation position of the pitot tube 1 and the connecting flange 6 can be quickly initially positioned, so that the pitot tube 1 and the connecting flange 6 can be fixedly installed by the pressure rod nut 9 later.

[0030] In this embodiment, the detection tube group 11 includes two high- and low-pressure transmission tubes and a temperature sensing tube, and the high- and low-pressure transmission tubes and the temperature sensing tube are fixedly assembled together by a fixing sleeve 12. In actual application, the connecting flange 6 is fixed to the front flange of the temperature and pressure flow device to be tested, so that the inner hole of the flange is inserted into the chimney, and the entire Pitot tube 1 assembly is perpendicular to the direction of the flue gas flow, and the pressure difference is obtained through the two high- and low-pressure transmission tubes, so as to measure the flow rate of the gas, and at the same time cooperate with the temperature sensing tube to detect the temperature of the gas.

[0031] In this embodiment, a flat head is provided at one end of the high and low pressure transmission pipes, and during the detection process, the flat heads of the two high and low pressure transmission pipes are parallel up and down and perpendicular to the direction of the gas being detected.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable and adjustable polytetrafluoroethylene pitot tube, comprising a pitot tube, characterized in that: One end of the Pitot tube is threadedly connected with a pressure rod nut, the Pitot tube and the pressure rod nut are pressed and fixed on a connecting flange, and a detection tube group is installed through the inner cavity of the Pitot tube.

2. A detachable and adjustable polytetrafluoroethylene Pitot tube according to claim 1, characterized in that: The inner cavities at both ends of the Pitot tube are respectively plugged with a rear cover and a front cover, and the two ends of the Pitot tube are threadedly connected to the two pressure rod nuts to squeeze and fix the rear cover and the front cover, and washers are arranged between the rear cover and the front cover and the cavity wall of the pressure rod nut.

3. A detachable and adjustable polytetrafluoroethylene Pitot tube according to claim 2, characterized in that: The detection tubes in the detection tube set are all threadedly connected and pass through the rear cover, and the detection tubes in the detection tube set are all penetrated through the front cover.

4. A detachable and adjustable polytetrafluoroethylene Pitot tube according to claim 3, characterized in that: Positioning holes are arranged through the upper and lower tube walls of the Pitot tube, and threaded holes matching the positioning holes are arranged on the front cover and the rear cover. Positioning bolts pass through the positioning holes and are threadedly connected with the threaded holes.

5. A detachable and adjustable polytetrafluoroethylene Pitot tube according to any one of claims 1 to 4, characterized in that: A positioning column is fixedly connected to the outer wall of the lower part of the Pitot tube, and a positioning groove matching the positioning column is provided on the connecting flange.

6. A detachable and adjustable polytetrafluoroethylene Pitot tube according to claim 5, characterized in that: The detection tube group includes two high- and low-pressure transmission tubes and a temperature sensing tube. The high- and low-pressure transmission tubes and the temperature sensing tube are fixedly assembled together through a fixing sleeve.

7. A detachable and adjustable polytetrafluoroethylene Pitot tube according to claim 6, characterized in that: A flat head is provided at one end of the high and low pressure transmission pipe, and during the detection process, the flat heads of the two high and low pressure transmission pipes are parallel up and down and perpendicular to the direction of the gas to be detected.

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