Pitot tube flange fixing structure

Abstract

The utility model discloses a pitot tube flange fixing structure, which belongs to the technical field of pitot tube fixing, and comprises a flange base, a flange plate, a flange plate and a flange plate, the locking sleeve is sleeved on the pitot tube; the pressing sleeve is detachably installed at the connecting end of the flange base, and the locking sleeve is coaxially arranged on the inner side of the pressing sleeve; when the pressing sleeve is installed at the connecting end, the pressing sleeve axially moves relative to the connecting end, and the locking sleeve is stressed to deform so as to abut against the surface wall of the pitot tube. When the pitot tube needs to be maintained, overhauled and replaced or angle deviation occurs when the pitot tube is installed, locking of the pitot tube by the locking sleeve can be relieved only by disassembling the pressing sleeve, and therefore the pitot tube can be conveniently taken out of a pipeline.

Description

TECHNICAL FIELD

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

[0002] The existing pitot tube generally adopts flange plate or welded thread to be directly welded to the metal rod for fixing. This mode has multiple disadvantages: first, the welding process is time-consuming and laborious, and needs higher technical level; second, the flange position cannot be adjusted after welding, and once the position deviation leads to product scrap, the maintenance cost is high, and the production efficiency is low. INVENTION CONTENTS

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

[0004] The utility model embodiment adopts the following technical scheme: a pitot tube flange fixing structure, comprising: a flange base having a passage for the pitot tube to pass through; a locking sleeve, which is sleeved on the pitot tube; a compression sleeve, which is detachably installed on the connecting end of the flange base, and the locking sleeve is coaxially arranged inside the compression sleeve; when the compression sleeve is installed on the connecting end, the compression sleeve moves axially relative to the connecting end, and the locking sleeve is deformed under stress to abut against the surface wall of the pitot tube.

[0005] Preferably, the locking sleeve is configured as a first brass sleeve, and the inner wall of the compression sleeve has a first annular groove matched with the outer diameter of the first brass sleeve; when the compression sleeve moves axially relative to the connecting end, the first brass sleeve is embedded in the first annular groove, and the first brass sleeve is deformed by the side wall of the first annular groove to form an interference fit between the compression sleeve and the pitot tube.

[0006] Preferably, the top outer edge of the first brass sleeve is provided as a chamfered surface.

[0007] Preferably, the locking sleeve is configured as a second brass sleeve, and the top of the second brass sleeve has a flange extending outwardly; the second brass sleeve is sleeved on the pitot tube and located inside the compression sleeve; the flange is pressed against the end of the compression sleeve away from the connecting end by the limiting piece connected with the compression sleeve; when the compression sleeve moves axially relative to the connecting end, the connecting end extrudes the tail end of the second brass sleeve to deform to form a wrinkle against the compression sleeve and the pitot tube.

[0008] Preferably, the internal thread groove inside the compression sleeve is threadedly matched with the external thread groove of the connecting end to realize detachable connection of the compression sleeve and the connecting end.

[0009] Preferably, the limiting member has a pressing end sleeved on the pitot tube, and an internally threaded sleeve fixedly connected to the pressing end, the internally threaded sleeve being threadedly connected to an externally threaded end of the pressing sleeve, and the pressing end being pressed against the flange.

[0010] Preferably, an internally threaded groove on the inside of the pressing sleeve threadedly cooperates with an externally threaded groove of the connecting end to achieve detachable connection of the pressing sleeve and the connecting end, and the internally threaded groove has a gap with the second brass sleeve.

[0011] Preferably, the outer wall of the pressing sleeve is configured in a hexagonal bolt shape.

[0012] Preferably, the pitot tube flange fixing structure is used to mount the pitot tube on a pipeline to be tested, the flange base is mounted on the pipeline by bolts, and the passage is opposite an opening on the sidewall of the pipeline, the air inlet and the air outlet of the pitot tube are both arranged in the pipeline and are consistent with the pipeline.

[0013] The above at least one technical scheme adopted by the embodiment of the utility model can achieve the following beneficial effects:

[0014] The fixing structure can provide reliable stability for the pitot tube. The locking sleeve is tightly abutted against the surface wall of the pitot tube under the action of the pressing sleeve, effectively preventing the pitot tube from shaking or displacing in the pipeline. Since the locking sleeve is sleeved on the pitot tube and fixed by the action of the pressing sleeve, this structure has certain adaptability to slight differences in the outer diameter of the pitot tube (for example, the tolerance of the outer diameter of the pitot tube). When the pitot tube needs to be maintained, repaired, replaced, or the pitot tube is installed with an angle deviation, the locking sleeve can be unlocked by disassembling the pressing sleeve, so that the pitot tube can be conveniently taken out of the pipeline to adaptively adjust the installation position. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the utility model, and form a part of the utility model. The schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0016] Figure 1 It is a perspective structural schematic view of the utility model when the locking sleeve is used as one scheme;

[0017] Figure 2 It is a vertical sectional view of the utility model when the locking sleeve is used as one scheme;

[0018] Figure 3 It is a local structural exploded view of the utility model when the locking sleeve is used as one scheme;

[0019] Figure 4The utility model discloses adopt locking sleeve its second scheme's three -dimensional structure schematic diagram;

[0020] Figure 5 The utility model discloses adopt locking sleeve its second scheme's three -dimensional structure schematic diagram;

[0021] Figure 6 The utility model discloses adopt locking sleeve its second scheme's three -dimensional structure schematic diagram.

[0022] Reference Signs

[0023] 1-pitot tube;11-inlet;12-outlet;2-flange base;21-channel;22-connection end;23-external thread groove;31-first brass sleeve;311-chamfered surface;32-second brass sleeve;321-flange;4-pressing sleeve;41-first annular groove;42-internal thread groove;5-limiting piece;51-pressing end;52-internal thread sleeve. DETAILED DESCRIPTION

[0024] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0025] The technical solutions provided by the embodiments of the utility model are described in detail in combination with the drawings as follows.

[0026] Referring to Figures 1 to 6 The utility model discloses a pitot tube flange fixing structure, mainly including flange base 2, locking sleeve and pressing sleeve 4.

[0027] The flange base 2 has a channel 21 for the pitot tube 1 to pass through;The locking sleeve is sleeved on the pitot tube 1;The pressing sleeve 4 is detachably installed on the connection end 22 of the flange base 2, and the locking sleeve is coaxially arranged inside the pressing sleeve 4;When the pressing sleeve 4 is installed on the connection end 22, the connection end 22 is axially moved, and the locking sleeve is deformed under stress to tightly abut against the outer wall of the pitot tube 1. Specifically, the internal thread groove 42 inside the pressing sleeve 4 is threadedly connected with the external thread groove 23 of the connection end 22 to realize the detachable connection between the pressing sleeve 4 and the connection end 22.

[0028] In some practical applications, the pitot tube flange fixing structure is used to install the pitot tube 1 on a pipeline to be tested, the flange base 2 is installed on the pipeline by bolts (i.e. a flange plate installed on the pipeline, not shown in the figure), and the channel 21 is opposite to an opening on the side wall of the pipeline, and the inlet 11 and the outlet 12 of the pitot tube 1 are arranged in the pipeline and consistent with the direction of the pipeline.

[0029] In the embodiment, the fixing structure is designed to make the installation of the pitot tube 1 relatively simple. First, the flange base 2 is bolted to the flange plate of the pipeline to be tested, and since the flange base 2 has a passage 21 for the pitot tube 1 to pass through, the pitot tube 1 can easily pass through the passage 21. Then, the locking sleeve sleeved on the pitot tube 1 is placed in the appropriate position, and finally the compression sleeve 4 is installed at the connecting end 22 of the flange base 2. During the installation of the compression sleeve 4, the axial movement of the compression sleeve 4 relative to the connecting end 22 will cause the locking sleeve to be deformed and tightly abut against the surface wall of the pitot tube 1, thereby achieving the fixation of the pitot tube 1. The entire installation process does not require complex tools or special installation skills, greatly improving the installation efficiency, especially in some situations where the pitot tube 1 needs to be installed quickly for testing, such as temporary detection of fluid pipelines on industrial production lines, which can save time and labor costs.

[0030] In addition, the fixing structure can provide reliable stability for the pitot tube 1. The locking sleeve is tightly abutted against the surface wall of the pitot tube 1 under the action of the compression sleeve 4, effectively preventing the pitot tube 1 from shaking or shifting in the pipeline. For example, in a pipeline with high-speed fluid flow, if the pitot tube 1 is not fixed firmly, it may vibrate or deviate due to the impact of the fluid, which not only affects the accuracy of the pitot tube 1 measurement, but also may cause the pitot tube 1 to collide with the inner wall of the pipeline and be damaged. The stability of the fixing structure can ensure that the pitot tube 1 can still accurately measure the pressure and other parameters of the fluid in the pipeline in a harsh fluid environment, ensuring the reliability and continuity of the test data.

[0031] Since the locking sleeve is sleeved on the pitot tube 1 and is fixed by the action of the compression sleeve 4, this structure has certain adaptability to slight differences in the outer diameter of the pitot tube 1 (such as the tolerance of the outer diameter of the pitot tube 1).

[0032] When the pitot tube 1 needs to be maintained, repaired, replaced, or when the pitot tube 1 is installed with an angle deviation, the locking of the pitot tube 1 by the locking sleeve can be released by removing the compression sleeve 4, thereby facilitating the removal of the pitot tube 1 from the pipeline.

[0033] The locking sleeve can at least adopt the following two schemes or structures to lock the pitot tube 1.

[0034] One of the schemes of the locking sleeve, with reference to Figures 1 to 3As shown: the locking sleeve is configured as a first brass sleeve 31 (similar to a tubular brass sheet), the inner wall of the compression sleeve 4 has a first annular groove 41 matched with the outer diameter of the first brass sleeve 31; when the compression sleeve 4 moves axially relative to the connecting end 22, the first brass sleeve 31 is embedded in the first annular groove 41, and the first annular groove 41 side wall compresses the first brass sleeve 31 to deform to form an interference fit between the compression sleeve 4 and the pitot tube 1 (it should be noted that by changing the depth, width and inclination angle of the side wall of the first annular groove 41 and other parameters, the pressure and deformation degree of the first brass sleeve 31 when embedded can be adjusted, so as to control the tightness of the interference fit).

[0035] In this embodiment, the locking sleeve is made of brass because brass has good ductility and plasticity. When the first brass sleeve 31 is embedded in the first annular groove 41 under the action of the compression sleeve 4, the side wall of the first annular groove 41 exerts pressure on the brass sleeve. When the brass is subjected to extrusion, it will not easily break, but will gradually change shape according to the distribution of pressure, so as to better fit the outer wall of the pitot tube 1 and the inner wall of the compression sleeve 4, and realize a tight interference fit. When the first brass sleeve 31 deforms to form an interference fit with the compression sleeve 4 and the pitot tube 1, it can exert a clamping force on the pitot tube 1 in multiple directions.

[0036] Specifically, the top outer edge of the first brass sleeve 31 is provided with a chamfered surface 311, which can allow the first brass sleeve 31 to be relatively easily embedded in the first annular groove 41.

[0037] The second scheme of the locking sleeve is described below with reference to Figures 4 to 6 As shown: the locking sleeve is configured as a second brass sleeve 32, the top of the second brass sleeve 32 has a flange 321 extending outwardly (i.e. the locking sleeve is configured as a T-shaped structure in cross-section), the second brass sleeve 32 is sleeved on the pitot tube 1 and located inside the compression sleeve 4, the flange 321 is pressed on the end of the compression sleeve 4 away from the connecting end 22 by the limiting piece 5 connected to the compression sleeve 4; when the compression sleeve 4 moves axially relative to the connecting end 22, the connecting end 22 extrudes the tail end of the second brass sleeve 32 to deform to form a wrinkle against the compression sleeve 4 and the pitot tube 1.

[0038] In the embodiment, when the compression sleeve 4 moves axially relative to the connecting end 22, the connecting end 22 extrudes the tail end of the second brass sleeve 32 to form wrinkles. The wrinkles tightly abut against the compression sleeve 4 and the pitot tube 1, and generate strong radial holding force. Since the flange 321 is tightly compressed, the whole structure can withstand a large axial force. The material characteristics of the brass sleeve enable it to have a certain self-adaptive ability when forming the wrinkles. It can automatically adjust the shape and distribution of the wrinkles according to the outer diameter of the pitot tube 1 and the inner diameter of the compression sleeve 4, so as to achieve a better fitting effect. Moreover, by adjusting the axial movement distance of the compression sleeve 4, the deformation degree of the tail end of the second brass sleeve 32 can be controlled, and then the tightness and holding force of the wrinkles can be adjusted. This characteristic makes the structure have good versatility and flexibility.

[0039] In addition, considering that the locking sleeve is compressed on the pitot tube 1 after deformation, if it is found during assembly that the angle of the pitot tube 1 still has a deviation, it is difficult for the worker to remove the locking sleeve compressed on the pitot tube 1 by hand, and even the whole pitot tube 1 product may be scrapped; therefore, in the embodiment, the second brass sleeve 32 with the flange 321 structure is provided, and the flange 321 is compressed by the limiting piece 5, so that when it is necessary to remove the locking sleeve of this structure, the worker only needs to remove the compression sleeve 4, that is, move the compression sleeve 4 away from the connecting end 22, so as to pull the flange 321 to move together, so that the second brass sleeve 32 located on the pitot tube 1 can be loosened under the driving of the flange 321, and then it is convenient to remove it from the pitot tube 1, and only the new locking sleeve needs to be replaced, so as to avoid causing the whole pitot tube 1 product to be scrapped.

[0040] Based on the second embodiment of the locking sleeve, referring to Figures 4 to 6 the limiting piece 5 has a compression end 51 sleeved on the pitot tube 1, and an inner threaded sleeve 52 fixedly connected to the compression end 51, the inner threaded sleeve 52 is threadedly connected to the outer threaded end (as shown in Figure 6 the compression end 51 is compressed on the flange 321, so that the limiting piece 5 is installed on the compression sleeve 4 in a threaded connection manner, so as to conveniently remove the damaged second brass sleeve 32 and replace a new second brass sleeve 32. In the embodiment, the inner threaded groove 42 on the inner side of the compression sleeve 4 is threadedly matched with the outer threaded groove 23 of the connecting end 22, so as to realize the detachable connection of the compression sleeve 4 and the connecting end 22; the inner threaded groove 42 and the second brass sleeve 32 have a gap, and the gap allows the tail end of the second brass sleeve 32 to have a deformation space when the tail end is deformed to form wrinkles.

[0041] It should be noted that the outer circumferential surface of the limiting piece 5 can be configured as a frosted material (as shown in Figure 4), so as to facilitate the staff to manually rotate the limiting piece 5, and can also be configured as a hexagonal bolt shape and the like.

[0042] In addition, in practical applications, the outer wall of the pressing sleeve 4 is configured as a hexagonal bolt shape (such as Figure 4 ), so as to facilitate the installation or disassembly of the pressing sleeve 4 by a wrench.

[0043] The above is only a preferred embodiment of the present application, and is not intended to 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 range of the present application, and equivalent embodiments with equivalent changes are equivalent. Any modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A Pitot tube flange fixing structure, characterized in that, include: Flange base (2) has a channel (21) through which a Pitot tube (1) passes. A locking sleeve is fitted onto the pitot tube (1); The clamping sleeve (4) is detachably installed on the connecting end (22) of the flange base (2). The locking sleeve is coaxially placed inside the clamping sleeve (4). When the clamping sleeve (4) is installed on the connecting end (22), it moves axially relative to the connecting end (22) and causes the locking sleeve to be deformed by force to press against the surface wall of the Pitot tube (1).

2. The Pitot tube flange fixing structure according to claim 1, characterized in that, The locking sleeve is configured as a first brass sleeve (31), and the inner wall of the clamping sleeve (4) has a first annular groove (41) that matches the outer diameter of the first brass sleeve (31). When the clamping sleeve (4) moves axially relative to the connecting end (22), the first brass sleeve (31) is embedded in the first annular groove (41) and the first brass sleeve (31) is deformed by the side wall of the first annular groove (41) to form an interference fit with the clamping sleeve (4) and the Pitot tube (1).

3. The Pitot tube flange fixing structure according to claim 2, characterized in that, The top outer edge of the first brass sleeve (31) is set as a chamfered surface (311).

4. The Pitot tube flange fixing structure according to claim 1, characterized in that, The locking sleeve is configured as a second brass sleeve (32), the top of which has an outwardly extending flange (321). The second brass sleeve (32) is fitted onto the pitot tube (1) and located inside the compression sleeve (4). The flange (321) is pressed against the end of the compression sleeve (4) away from the connecting end (22) by a limiting member (5) connected to the compression sleeve (4). When the compression sleeve (4) moves axially relative to the connecting end (22), the connecting end (22) squeezes the tail end of the second brass sleeve (32) to deform to form a fold against the compression sleeve (4) and the pitot tube (1).

5. A Pitot tube flange fixing structure according to claim 1, characterized in that, The inner thread groove (42) on the inner side of the clamping sleeve (4) is threadedly engaged with the outer thread groove (23) of the connecting end (22) to achieve a detachable connection between the clamping sleeve (4) and the connecting end (22).

6. A Pitot tube flange fixing structure according to claim 4, characterized in that, The limiting member (5) has a pressing end (51) sleeved on the pitot tube (1) and an internal threaded sleeve (52) fixedly connected to the pressing end (51). The internal threaded sleeve (52) is threaded to the external threaded end on the pressing sleeve (4), and the pressing end (51) is pressed against the flange (321).

7. A Pitot tube flange fixing structure according to claim 4, characterized in that, The inner thread groove (42) on the inner side of the clamping sleeve (4) is threadedly engaged with the outer thread groove (23) of the connecting end (22) to realize the detachable connection between the clamping sleeve (4) and the connecting end (22); there is a gap between the inner thread groove (42) and the second brass sleeve (32).

8. A Pitot tube flange fixing structure according to claim 5, characterized in that, The outer wall of the clamping sleeve (4) is configured in the shape of a hexagonal bolt.

9. A Pitot tube flange fixing structure according to any one of claims 1-8, used to install a Pitot tube (1) onto the pipeline to be tested, characterized in that, The flange base (2) is bolted to the pipe, and the channel (21) is directly opposite the opening on the side wall of the pipe. The air inlet (11) and air outlet (12) of the Pitot tube (1) are both located inside the pipe and are aligned with the pipe direction.

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