Pitot tube fixing structure

Abstract

The utility model discloses a pitot tube fixing structure, which belongs to the technical field of pitot tubes, and comprises a base provided with a channel for penetration of a pitot tube, a first limiting wall formed in the channel, and a limiting groove axially extending along the channel; the limiting piece is arranged on the joint part of the pitot tube; when the connector part extends into the channel, the limiting piece is embedded into the limiting groove and moves in the direction of the limiting groove so as to achieve limiting of the connector part in the circumferential direction. The locking piece is provided with a locking position relative to the base; when the locking piece is located at the locking position, the limiting part of the locking piece abuts against the connector part and forces the connector part to be tightly pressed on the first limiting wall, so that axial limiting of the pitot tube relative to the base is achieved. Through the arrangement of the limiting groove in the base, the accurate direction can be determined when the base is welded, the follow-up installation of the pitot tube can be carried out in the direction specified by the limiting groove, and it is ensured that the direction of an air inlet of the pitot tube is consistent with the direction of a pipeline.

Description

TECHNICAL FIELD

[0001] The utility model relates to pitot tube technical field especially relates to a pitot tube fixing structure. BACKGROUND

[0002] In the existing pitot tube fixing structure, especially in the pipeline environment that needs accurate measurement, the installation accuracy of the pitot tube directly affects the reliability of the measurement result. Some existing fixing structures are to weld the welding base of the pitot tube to the pipeline to be measured first, and then the pitot tube is fixed to the welding base through threaded connection. Since the air inlet of the pitot tube needs to be consistent with the direction of the pipeline (the better the consistency, the higher the measurement accuracy), it is difficult to ensure that the pointing direction of the air inlet of the pitot tube is correct after installation by relying only on the existing threaded connection method. Therefore, these methods may cause the air inlet of the pitot tube to be inconsistent with the direction of the pipeline in actual use, resulting in a decrease in the accuracy of the measurement data. SUMMARY

[0003] The utility model embodiment provides a pitot tube fixing structure to solve the problem in prior art.

[0004] The utility model embodiment adopts the following technical scheme: a pitot tube fixing structure, comprising: a base having a channel for the pitot tube to pass through, and a first limiting wall is formed in the channel, and a limiting groove extending axially along the channel is further arranged on the base; a limiting piece is installed on the joint part of the pitot tube; when the joint part extends into the channel, the limiting piece is embedded in the limiting groove and moves along the direction thereof to realize the circumferential direction limiting of the joint part; a locking piece has a locking position relative to the base; when the locking piece is in the locking position, the limiting part of the locking piece abuts against the joint part and forces the joint part to press against the first limiting wall to realize the axial limiting of the pitot tube relative to the base.

[0005] Preferably, the limiting piece is configured as a limiting screw, and the joint part has a first threaded hole, and the limiting screw is threadedly connected in the first threaded hole.

[0006] Preferably, the limiting piece is installed on the joint part through a set of adjusting assemblies, and the position of the limiting piece in the circumferential direction of the joint part is adjusted.

[0007] Preferably, the adjusting assembly comprises: a sliding block that is slidably arranged in a movable groove on the joint part along the circumferential direction of the joint part, and a second threaded hole is arranged on the sliding block; the limiting piece is configured as a limiting screw, and the limiting screw is threadedly connected in the second threaded hole and abuts against the wall surface of the movable groove when the limiting piece is in the locking position to limit the movement of the sliding block; a guide piece is arranged in the movable groove to guide the movement of the sliding block.

[0008] Preferably, the guide is configured as a guide rod extending along the circumferential direction of the joint part, and the sliding block has a sliding hole matched with the guide rod; at least one end of the guide rod is spaced apart from one side wall of the movable slot, so that the sliding block enters the movable slot from the gap.

[0009] Preferably, the locking member is configured as a locking nut threadedly connected to the threaded end of the base end.

[0010] Preferably, the limiting part is configured as an annular protrusion connected to one end of the locking nut, and the annular protrusion abuts against the top of the joint part when the locking nut is connected to the base.

[0011] Preferably, the limiting part is configured as an annular protrusion connected to one end of the locking nut, and the top of the joint part is provided with an annular groove coaxial with the top; the annular protrusion is embedded in the annular groove and abuts against the bottom wall of the annular groove when the locking nut is connected to the base.

[0012] Preferably, the outer peripheral wall of the joint part is configured as a column, and the outer diameter of the column is matched with the size of the channel.

[0013] Preferably, the base is welded to the opening in the side wall of the pipeline, and the air inlet and the air outlet of the pitot tube are arranged in the pipeline and consistent with the direction of the pipeline when the limiting member is embedded in the limiting groove.

[0014] The above at least one technical solution adopted by the embodiment of the utility model can achieve the following beneficial effects:

[0015] Firstly, the setting of the limiting groove in the base can determine the accurate direction when the base is welded, and the subsequent installation of the pitot tube can be performed in the direction specified by the limiting groove, especially when the pitot tube is applied to pipeline measurement, the fixing structure reliably ensures that the direction of the air inlet of the pitot tube is consistent with the direction of the pipeline, greatly improving the accuracy of the installation of the pitot tube and the reliability of the subsequent measurement results.

[0016] Secondly, the design of the limiting member with the adjusting assembly can easily adjust the position of the limiting member by operating the adjusting assembly when the welding deviation of the base is found. Compared with the fixing structure without the adjusting function, the fixing structure greatly improves the fault tolerance of the entire pitot tube fixing structure to the welding deviation, and further ensures the installation position accuracy of the pitot tube. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a perspective view of the pitot tube fixing structure and the pipeline of the present application;

[0019] Figure 2 It is a vertical sectional view of the pitot tube fixing structure and the pipeline of the present application;

[0020] Figure 3 It is a vertical sectional view of the pitot tube fixing structure of the present application;

[0021] Figure 4 It is an assembly view of the pitot tube and the base of the present application;

[0022] Figure 5 It is a pitot tube structure schematic view of one of the embodiments of the limiting member of the present application;

[0023] Figure 6 It is a pitot tube structure schematic view of another of the embodiments of the limiting member of the present application;

[0024] Figure 7 It is an exploded view of the adjusting assembly of the present application;

[0025] Figure 8 It is an assembly view between the guide member and the pitot tube of the present application.

[0026] Reference signs

[0027] 1-pitot tube; 11-joint part; 12-first threaded hole; 13-movable slot; 14-inlet; 15-outlet; 16-annular groove; 17-embedded groove; 2-base; 21-channel; 22-first limiting wall; 23-limiting slot; 24-threaded end; 3-limiting member; 4-locking member; 41-limiting part; 51-slider; 511-second threaded hole; 512-sliding hole; 52-guide member; 6-pipeline; 7-scale line. DETAILED DESCRIPTION

[0028] To further explain the technical means and effects adopted by the present application to achieve the predetermined application purposes, the specific embodiments, structures, features and effects according to the present application are described in detail as follows in combination with the drawings and preferred embodiments.

[0029] The technical solutions provided by each embodiment of the present application are described in detail in combination with the drawings as follows.

[0030] Reference Figures 1 to 7As shown, the utility model embodiment provides a pitot tube fixing structure, including base 2, limiting piece 3 and locking piece 4. In practical application, the joint part 11 outer peripheral wall of pitot tube 1 is configured as a cylinder, and its outer diameter is adapted to the size of the passage 21 on the base 2.

[0031] The passage 21 on the base 2 is mainly for the pitot tube 1 to pass in, and a first limiting wall 22 is formed in the passage 21, and the base 2 is also provided with a limiting groove 23 extending axially along the passage 21; the limiting piece 3 is installed on the joint part 11 of the pitot tube 1; when the joint part 11 extends into the passage 21, the limiting piece 3 is embedded in the limiting groove 23 and moves along the direction thereof to realize the circumferential direction limiting of the joint part 11; the limiting groove 23 guides the limiting piece 3 to move in a specific direction, thereby limiting the position of the pitot tube 1 in the circumferential direction, avoiding its arbitrary rotation, and ensuring that the direction of the air inlet 14 of the pitot tube 1 can accurately align with the required direction. In the following actual application scenarios, the base 2 is usually welded to the pipeline 6, which has high requirements for the direction accuracy of the base 2 during welding. In the structure, by reasonably setting the limiting groove 23, the approximate accurate direction or position can be determined according to the limiting groove 23 before welding the base 2, and then the welding operation is performed, and subsequently, the position of the air inlet 14 in the pipeline 6 is ensured under the guidance of the limiting groove 23 in the passage 21.

[0032] The locking piece 4 has a locking position relative to the base 2; when the locking piece 4 is in the locking position, the limiting part 41 of the locking piece 4 abuts against the joint part 11 and forces the joint part 11 to press tightly against the first limiting wall 22, so as to realize the axial limiting of the pitot tube 1 relative to the base 2, prevent the loosening of the entire pitot tube 1 in the axial direction, stably fix the pitot tube 1 on the base 2, and ensure the stability of the pitot tube 1 during use, that is, even when subjected to fluid impact or other external forces, the accurate installation position can be maintained.

[0033] In summary, by setting the limiting groove 23 on the base 2, the accurate direction can be determined when welding the base 2, and the pitot tube 1 can be installed in the direction specified by the limiting groove 23, especially when the pitot tube 1 is applied to the pipeline 6 for measurement, the fixing structure reliably ensures that the direction of the air inlet 14 of the pitot tube 1 is consistent with the direction of the pipeline 6, greatly improving the accuracy of the installation of the pitot tube 1 and the reliability of the subsequent measurement results.

[0034] Referring to Figures 4 to 7 As shown, in some practical applications, based on the above embodiment, the limiting piece 3 can be installed in at least the following two ways.

[0035] One of the embodiments of the limiting member 3: the limiting member 3 is configured as a limiting screw, and the joint portion 11 is provided with a first threaded hole 12, and the limiting screw is screwed into the first threaded hole 12. By limiting the limiting screw through the limiting groove 23, it can be ensured that the joint portion 11 of the pitot tube 1 can move along the axial direction of the channel 21 when being installed into the channel 21 of the base 2, and at the same time, it can also ensure that the directions of the air inlet 14 and the air outlet 15 of the pitot tube 1 will not deviate in the circumferential direction during the installation.

[0036] Another embodiment of the limiting member 3: the limiting member 3 is installed on the joint portion 11 through a set of adjusting assemblies, and the position of the limiting member 3 in the circumferential direction of the joint portion 11 is adjusted. In this embodiment, the purpose is to cope with the situation that the welding position of the base 2 deviates. When such a deviation occurs, the position of the limiting member 3 in the circumferential direction of the joint portion 11 can be flexibly adjusted through the adjusting assemblies, and then the position accuracy during the subsequent installation of the pitot tube 1 can be ensured, and it can still be ensured that the direction of the air inlet 14 of the pitot tube 1 is consistent with the direction of the pipeline 6, and the accuracy and reliability of the entire pitot tube 1 fixing structure are maintained.

[0037] Specifically, referring to FIG. 1, Figures 6 to 7 The adjusting assembly includes a sliding block 51 and a guide member 52.

[0038] The sliding block 51 is slidably arranged in a movable groove 13 on the joint portion 11 along the circumferential direction of the joint portion 11, and the sliding block 51 is provided with a second threaded hole 511. The limiting member 3 is configured as a limiting screw, which is screwed into the second threaded hole 511 and abuts against the wall surface of the movable groove 13 to limit the movement of the sliding block 51, thereby fixing the position of the sliding block 51 and indirectly determining the final position of the limiting member 3 in the circumferential direction. The guide member 52 is arranged in the movable groove 13 to guide the movement of the sliding block 51. In actual application, the guide member 52 is configured as a guide rod extending along the circumferential direction of the joint portion 11, and the sliding block 51 is provided with a sliding hole 512 that is slidably connected with the guide rod. At least one end of the guide rod is spaced apart from one side wall of the movable groove 13 to allow the sliding block 51 to enter the movable groove 13 from the gap. The design of the gap allows the sliding block 51 to enter the movable groove 13 from the gap, thereby realizing the detachable connection of the sliding block 51. Such a design not only facilitates the smooth installation of the sliding block 51 in the initial assembly, but also facilitates the disassembly of the sliding block 51 during subsequent maintenance, replacement and other operations, thereby improving the maintainability and assembly convenience of the entire structure.

[0039] In other applications, such as Figure 8As shown, the guide 51 can also be configured as a roughly 3 / 4 ring, and the Pitot tube is provided with an inner slot 17 extending along the circumferential direction of the tube, and the guide can be embedded in the inner slot 17, and the roughly 1 / 4 gap reserved by the guide can facilitate the installation of the slider 51.

[0040] In actual application scenarios, such as industrial ventilation pipes 6 or aviation wind tunnel tests, etc. The installation accuracy of the Pitot tube 1 is relatively high. Although the position accuracy of the base 2 has been ensured as much as possible during welding, it is still difficult to completely avoid certain welding position deviations due to various factors in actual operation (such as slight differences in welding process, pipe 6 surface flatness, etc.). Therefore, by using this limiting part 3 with an adjusting assembly, the position of the limiting part 3 can be easily adjusted by operating the adjusting assembly after the welding deviation is found. Compared with the fixed structure without such an adjusting function, it greatly improves the fault tolerance of the entire Pitot tube 1 fixing structure to welding deviation, further ensures the final installation position accuracy of the Pitot tube 1, and guarantees the accuracy of the Pitot tube 1 in measuring fluid flow rate and other related parameters during use. The Pitot tube 1 fixing structure can better adapt to complex and variable actual installation conditions.

[0041] In addition, corresponding scale lines 7 (such as Figure 6 ) are engraved on the slider 51 and the joint part 11. When the welding position of the base 2 does not deviate, the scale lines 7 are directly aligned to determine the fixed position of the slider 51.

[0042] Referring to Figures 3 to 7 As shown, in some actual applications, based on any of the above embodiments, the locking part 4 is configured as a locking nut which is threadedly connected to the threaded end 24 of the end of the base 2.

[0043] The limiting part 41 is configured as an annular protrusion connected to one end of the locking nut, and the locking nut is connected to the base 2 so that the annular protrusion abuts against the top of the joint part 11. In addition, in actual production and application, an annular groove 16 coaxial with the joint part 11 is often provided on the top of the joint part 11. In this case, when the locking nut is connected to the base 2, the annular protrusion is embedded in the annular groove and abuts against the bottom wall of the annular groove.

[0044] Based on any of the above embodiments, the fixing structure is mainly used to mount the pitot tube 1 on the pipeline 6, the base 2 is welded on the opening on the side wall of the pipeline 6, when the limiting member 3 is embedded in the limiting groove 23, the air inlet 14 and the air outlet 15 of the pitot tube 1 are both placed in the pipeline 6 and consistent with the direction of the pipeline 6, therefore, when welding the base 2, the position of the limiting groove 23 needs to be ensured to be opposite to the side of the pipeline 6, so as to ensure that the air inlet is consistent with the direction of the pipeline (as shown in Figure 2 and Figure 4 ).

[0045] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the present application, and any equivalent embodiments with equivalent changes and modifications are still within the scope of the present application.

Claims

1. A Pitot tube fixing structure, characterized in that, include: The base (2) has a channel (21) through which the Pitot tube (1) passes, and a first limiting wall (22) is formed in the channel (21). The base (2) is also provided with a limiting groove (23) extending axially along the channel (21). The limiting member (3) is installed on the connector (11) of the pitot tube (1); when the connector (11) extends into the channel (21), the limiting member (3) is embedded in the limiting groove (23) and moves along its direction to achieve circumferential limiting of the connector (11); The locking member (4) has a locking position relative to the base (2); when the locking member (4) is in the locking position, the limiting part (41) of the locking member (4) abuts against the joint part (11) and forces the joint part (11) to press against the first limiting wall (22) to achieve axial limiting of the pitot tube (1) relative to the base (2).

2. The Pitot tube fixing structure according to claim 1, characterized in that, The limiting member (3) is configured as a limiting screw, and the connector (11) has a first threaded hole (12), and the limiting screw is threaded into the first threaded hole (12).

3. The Pitot tube fixing structure according to claim 1, characterized in that, The limiting member (3) is installed on the connector (11) by a set of adjustment components, and the position of the limiting member (3) in the circumferential direction of the connector (11) is adjusted.

4. The Pitot tube fixing structure according to claim 3, characterized in that, The adjustment component includes: The slider (51) slides along the circumferential direction of the connector (11) and is placed in the movable slot (13) on the connector (11). The slider (51) is provided with a second threaded hole (511). The limiting member (3) is configured as a limiting screw. When the limiting screw is threaded into the second threaded hole (511) and abuts against the wall of the movable slot (13), it restricts the movement of the slider (51). A guide (52) is provided in the movable slot (13) to guide the movement of the slider (51).

5. A Pitot tube fixing structure according to claim 4, characterized in that, The guide (52) is configured as a guide rod extending along the circumferential direction of the joint (11), and the slider (51) has a sliding hole (512) that slides with the guide rod; at least one end of the guide rod is left with a gap between it and one side wall of the movable slot (13) so that the slider (51) enters the movable slot (13) through the gap.

6. The Pitot tube fixing structure according to claim 1, characterized in that, The main structure of the locking component (4) is configured as a locking nut, which is threadedly connected to the threaded end (24) at the end of the base (2).

7. A Pitot tube fixing structure according to claim 6, characterized in that, The limiting part (41) is configured as an annular protrusion connected to one end of the locking nut, such that when the locking nut is connected to the base (2), the annular protrusion abuts against the top of the connector (11).

8. A Pitot tube fixing structure according to claim 6, characterized in that, The limiting part (41) is configured as an annular protrusion connected to one end of the locking nut, and the top of the connector part (11) is provided with an annular groove (16) coaxial with it; when the locking nut is connected to the base (2), the annular protrusion is embedded in the annular groove and abuts against the bottom wall of the annular groove.

9. A Pitot tube fixing structure according to claim 1, characterized in that, The outer peripheral wall of the connector (11) is configured as a column, and its outer diameter is adapted to the size of the channel (21).

10. A Pitot tube fixing structure according to any one of claims 1-9, for installing a Pitot tube (1) onto a pipe (6), characterized in that, The base (2) is welded to the opening on the side wall of the pipe (6). When the limiting member (3) is embedded in the limiting groove (23), the air inlet (14) and air outlet (15) of the pitot tube (1) are both placed in the pipe (6) and are aligned with the direction of the pipe (6).

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