A lengthened pitot tube fixing device and fixing method

Abstract

The application discloses a kind of lengthened pitot tube fixing device and fixing method, to solve the problem of low accuracy of measurement data and low safety in prior art in the use process of lengthened pitot tube, due to length is too long, it is extremely difficult to operate and prone to shaking etc., cause.The hole fixing sleeve is fixed on the smoke flue reserved measuring hole, the lengthened pitot tube is inserted into the pitot tube fixing sleeve, the pitot tube locking sleeve is set and the rolling locking steel ball is arranged in the axial direction of the sleeve, the end plate is installed on the pitot tube fixing sleeve, which effectively prevents the pitot tube locking sleeve from falling off along the axial direction, and the cooperation of annular guide rail groove and guide rail boss can make the pitot tube locking sleeve rotate along the circumferential direction formed by guide rail boss and guide rail groove combination.The device has good fixing effect, simple and flexible structure, convenient on-site assembly, effectively prevents the shaking and tilting of lengthened pitot tube during sampling process, protects test personnel, improves work efficiency and measurement accuracy.

Description

Technical Field

[0001] This invention belongs to the field of air volume measurement and relates to an extended Pitot tube fixing device and fixing method. Background Technology

[0002] As the capacity of single coal-fired power units increases, the cross-sectional dimensions of flue gas ducts also become larger, making the accurate measurement and control of key parameters such as flue gas volume crucial. To facilitate the measurement and calibration of online flue gas volume measurement devices, various portable flue gas volume measurement devices have been developed. Among them, the extended Pitot tube is a common and typical device for measuring flue gas volume in large flue gas ducts. However, the extended Pitot tube is extremely difficult to operate during use due to its excessive length, and is prone to shaking, tipping, and slipping. This not only seriously affects the accuracy of the measurement data but also endangers the personal safety of the testing personnel. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art by providing an extended Pitot tube fixing device and fixing method. This invention aims to solve the technical defects of the prior art where the extended Pitot tube is extremely difficult to operate during use due to its excessive length, and is prone to shaking, tipping, and slipping, resulting in low accuracy of measurement data and low testing safety.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] The present invention proposes an extended Pitot tube fixing device, comprising a measuring hole fixing sleeve, a Pitot tube fixing sleeve, and a Pitot tube locking sleeve;

[0006] The measuring hole fixing sleeve is vertically installed on the pre-reserved measuring hole in the flue gas duct. The Pitot tube fixing sleeve is vertically installed on the inner wall of the measuring hole fixing sleeve. The Pitot tube fixing sleeve has a hollow cylindrical structure. The inner wall of the Pitot tube fixing sleeve is fitted to the outer wall of the extended Pitot tube. The Pitot tube fixing sleeve is divided into an upper sleeve and a lower sleeve. A hollow disc is horizontally arranged at the junction of the upper sleeve and the lower sleeve. The outer diameter of the hollow disc is larger than the outer diameter of the measuring hole fixing sleeve. The upper sleeve has two protective sleeves along the axial direction. Each protective sleeve is composed of several rolling locking steel balls. The rolling locking steel balls are embedded in the upper sleeve at equal intervals. The Pitot tube locking sleeve is installed between the inner wall of the measuring hole fixing sleeve and the outer wall of the upper sleeve.

[0007] Preferably, an end plate is horizontally mounted above the Pitot tube locking sleeve, and the end plate has a hollow structure.

[0008] Preferably, the upper end face of the Pitot tube locking sleeve is provided with an annular guide rail groove, and a guide rail boss for engaging with the guide rail groove is installed on the lower wall of the end plate.

[0009] Preferably, the end plate has four symmetrically arranged end plate fixing holes, and the upper end face of the Pitot tube fixing sleeve has a first hole for corresponding connection with the end plate fixing holes. The end plate fixing holes and the first hole are fixed by screws.

[0010] Preferably, the protective sleeve consists of four rolling locking steel balls, each of which is equally spaced and embedded in the upper sleeve.

[0011] Preferably, the inner wall of the Pitot tube locking sleeve is provided with a steel ball extrusion groove that fits with the rolling locking steel ball.

[0012] Preferably, the diameter of the rolling locking steel ball is greater than the annular width of the Pitot tube fixing sleeve.

[0013] Preferably, the two protective sleeves are arranged at equal intervals on the upper sleeve.

[0014] The present invention proposes a method for fixing an extended Pitot tube, comprising the following steps:

[0015] Install the measuring hole fixing sleeve vertically on the pre-reserved measuring hole in the flue, lock the measuring hole fixing sleeve, then install the Pitot tube fixing sleeve vertically on the inner side wall of the measuring hole fixing sleeve, insert the extended Pitot tube into the inner side wall of the Pitot tube fixing sleeve, and lock the extended Pitot tube.

[0016] A locking sleeve is installed between the upper sleeve and the measuring hole fixing sleeve. The locking sleeve of the Pitot tube is in contact with the rolling locking steel ball to fasten the extended Pitot tube and realize the fixation of the extended Pitot tube.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention proposes an extended Pitot tube fixing device. A measuring hole fixing sleeve is fixed to a pre-reserved measuring hole in the flue gas duct, locking the extended Pitot tube fixing device to the pre-reserved measuring hole in the flue gas duct and preventing shaking. The extended Pitot tube is then inserted into the Pitot tube fixing sleeve, vertically installed on the inner wall of the measuring hole fixing sleeve, locking the extended Pitot tube to the fixing device and preventing shaking. This effectively prevents shaking and tilting of the extended Pitot tube during sampling, protecting the testing instruments and personnel. A Pitot tube locking sleeve is provided, with several rolling locking steel balls in the axial direction of the upper sleeve. The pressure generated by the compression between the Pitot tube locking sleeve and the rolling locking steel balls locks the extended Pitot tube in a certain position, preventing it from sliding down. When the extended Pitot tube is inserted and removed from the Pitot tube fixing sleeve at the start and end of the test, the rolling locking steel balls reduce resistance. The assembly is simple, saves manpower, and improves efficiency. Rolling locking steel balls are evenly spaced between the outer and inner diameters of the upper sleeve, ensuring uniform force distribution on the extended Pitot tube and preventing damage. A hollow disc is horizontally positioned at the junction of the upper and lower sleeves, with its outer diameter larger than that of the measuring hole fixing sleeve. This ensures the measuring hole fixing sleeve can be securely installed on the pre-drilled measuring hole in the flue gas duct. Therefore, the extended Pitot tube fixing device proposed in this invention solves the problems of low accuracy and low testing safety of extended Pitot tubes during use.

[0019] Furthermore, installing an end plate horizontally above the Pitot tube locking sleeve effectively prevents the Pitot tube locking sleeve from falling off axially. The end plate has a hollow structure to ensure that the extended Pitot tube can be inserted into the Pitot tube fixing sleeve.

[0020] Furthermore, an annular guide groove is provided on the upper end face of the Pitot tube locking sleeve, and a guide boss is provided on the lower wall of the end plate. The purpose is to enable the Pitot tube locking sleeve to rotate along the circumferential direction formed by the combination of the guide boss and the guide groove; it can also be used to prevent the Pitot tube locking sleeve from radial displacement.

[0021] Furthermore, four symmetrically arranged end plate fixing holes are provided on the end plate, and a first hole is provided on the upper end face of the Pitot tube fixing sleeve. The end plate fixing holes and the first hole are fixedly connected by screws, which can prevent the end plate from falling off, thereby preventing the Pitot tube locking sleeve from falling off axially.

[0022] Furthermore, the protective sleeve has four rolling locking steel balls, and each rolling locking steel ball is embedded in the upper sleeve at equal intervals. This allows the pressure generated by the compression between the Pitot tube locking sleeve and the rolling locking steel balls during circumferential rotation to be more uniform and less stressed, making it less likely for the extended Pitot tube to deform.

[0023] Furthermore, a steel ball compression groove is provided on the inner wall of the Pitot tube locking sleeve. The diameter of the rolling locking steel ball is larger than the ring width of the Pitot tube fixing sleeve, which provides sufficient room for the rolling locking steel ball to move and prevents damage to the inner wall of the Pitot tube locking sleeve.

[0024] Furthermore, the two protective sleeves are evenly spaced on the upper sleeve, making the upper sleeve more evenly stressed and less prone to deformation, thus protecting the extended Pitot tube from deformation.

[0025] The present invention proposes a fixing method for an extended Pitot tube fixing device, which is simple and easy to implement. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a front cross-sectional view of the extended Pitot tube fixing device of the present invention.

[0028] Figure 2 This is a top view of the extended Pitot tube fixing device of the present invention.

[0029] Figure 3 This is a front cross-sectional view of the locking sleeve of the extended Pitot tube fixing device of the present invention.

[0030] Figure 4 This is a cross-sectional view of the AA section of the Pitot tube locking sleeve of the extended Pitot tube fixing device of the present invention.

[0031] Figure 5 This is a front cross-sectional view of the end plate of the extended Pitot tube fixing device of the present invention.

[0032] Figure 6 This is a top cross-sectional view of the end plate of the extended Pitot tube fixing device of the present invention.

[0033] Wherein: 1-Measuring hole fixing sleeve; 2-Pitto tube fixing sleeve; 3-Pitto tube locking sleeve; 4-Rolling locking steel ball; 5-End plate; 6-Guide rail boss; 7-Guide rail groove; 8-End plate fixing hole; 9-Steel ball extrusion groove. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0040] The present invention will now be described in further detail with reference to the accompanying drawings:

[0041] This invention proposes an extended Pitot tube fixing device, such as... Figure 1 and Figure 2 The diagram shows the front and top cross-sectional views of the fixing device, which includes a measuring hole fixing sleeve 1, a Pitot tube fixing sleeve 2, a Pitot tube locking sleeve 3, a rolling locking steel ball 4, an end plate 5, a guide rail boss 6, a guide rail groove 7, an end plate fixing hole 8, and a steel ball extrusion groove 9.

[0042] The measuring hole fixing sleeve 1 can be fitted onto the pre-reserved measuring hole in the flue, so that the extended Pitot tube fixing device is locked to the pre-reserved measuring hole in the flue and prevents the extended Pitot tube fixing device from shaking.

[0043] The Pitot tube fixing sleeve 2 allows the extended Pitot tube to be inserted into it, locking the extended Pitot tube fixing device in place and preventing it from shaking. It offers excellent fixing, a simple and flexible structure, and is convenient to carry, transport, and assemble on-site. It effectively prevents the extended Pitot tube from shaking or tilting during sampling, protecting the testing instruments and personnel; it also improves work efficiency and the accuracy of measurement data.

[0044] The Pitot tube locking sleeve 3, through circumferential rotation, generates pressure by the compression between the Pitot tube locking sleeve 3 and the rolling locking steel ball 4, locking the extended Pitot tube in a certain position and preventing the extended Pitot tube from sliding down.

[0045] The rolling locking steel ball 4 serves two purposes. First, the pressure generated by the rolling locking steel ball 4 and the Pitot tube locking sleeve 3 locks the extended Pitot tube in a certain position, preventing it from sliding down. Second, when the extended Pitot tube is inserted into and removed from the Pitot tube fixing sleeve 2 at the start and end of the test, the rolling locking steel ball 4 reduces resistance, saves manpower, and improves efficiency.

[0046] like Figure 3 and Figure 4 The figures shown are the front and top cross-sectional views of the Pitot tube locking sleeve 3, respectively. An annular guide groove 7 is formed on the upper end face of the Pitot tube locking sleeve 3. Figure 5 and Figure 6 The figures shown are the front view and top view of the end plate 5, respectively. The lower wall of the end plate 5 is provided with a guide rail boss 6 for engaging with the guide rail groove 7.

[0047] End plate 5 is used to prevent the Pitot tube locking sleeve 3 from falling off axially.

[0048] The guide rail boss 6 and the guide rail groove 7 can be interlocked with each other. On the one hand, the Pitot tube locking sleeve 3 can rotate along the circumferential direction formed by the combination of the guide rail boss 6 and the guide rail groove 7; on the other hand, it can prevent the Pitot tube locking sleeve 3 from radial displacement.

[0049] The end plate fixing hole 8 can fix the end plate 5 to the top of the Pitot tube fixing sleeve 2, while preventing the Pitot tube locking sleeve 3 from falling off from the top.

[0050] The steel ball extrusion groove 9 gradually changes in diameter along a quarter circumference. When the locking sleeve 3 is rotated, it extrudes the rolling locking steel ball 4, thereby locking the extended Pitot tube.

[0051] The present invention proposes an extended Pitot tube fixing device, wherein the measuring hole fixing sleeve 1 is vertically installed on the measuring hole reserved on the flue.

[0052] The Pitot tube fixing sleeve 2 is vertically installed on the inner wall of the measuring hole fixing sleeve 1. The Pitot tube fixing sleeve 2 has a hollow cylindrical structure, and its inner wall is fitted to the outer wall of the extended Pitot tube. The Pitot tube fixing sleeve 2 is divided into an upper sleeve and a lower sleeve, which are of equal length. A hollow disc is horizontally arranged at the junction of the upper and lower sleeves, and the outer diameter of the hollow disc is larger than the outer diameter of the measuring hole fixing sleeve 1.

[0053] The Pitot tube locking sleeve 3 is installed between the inner wall of the measuring hole fixing sleeve 1 and the outer wall of the upper sleeve.

[0054] Two protective sleeves are provided in the axial direction of the upper sleeve. Each protective sleeve is composed of several rolling locking steel balls 4, which are equally spaced between the outer diameter and the inner diameter of the upper sleeve.

[0055] Preferably, the upper end face of the Pitot tube locking sleeve 3 is provided with an annular guide rail groove 7, and an end plate 5 for fixing the Pitot tube locking sleeve 3 is horizontally installed above the Pitot tube locking sleeve 3. A guide rail boss 6 for engaging with the guide rail groove 7 is installed on the lower wall of the end plate 5. The end plate 5 has a hollow structure, which can prevent the Pitot tube locking sleeve 3 from falling off along the axial direction.

[0056] Preferably, such as Figure 3 and Figure 4 As shown, the inner wall of the Pitot tube locking sleeve 3 is provided with a steel ball extrusion groove 9 that fits with the rolling locking steel ball 4 with a clearance. The diameter of the steel ball extrusion groove 9 gradually changes along the quarter circumferential direction. When the Pitot tube locking sleeve 3 is rotated, it extrudes the rolling locking steel ball 4, thereby locking the Pitot tube. The diameter of the rolling locking steel ball 4 is greater than the difference between the outer diameter and the inner diameter of the Pitot tube fixing sleeve 2.

[0057] Preferably, the protective sleeve consists of four rolling locking steel balls 4, each of which is equally spaced within the upper sleeve. This ensures that during circumferential rotation, the pressure generated by the compression between the Pitot tube locking sleeve 3 and the rolling locking steel balls 4 is more uniform, and the pressure is less, making it less likely for the extended Pitot tube to deform.

[0058] Preferably, such as Figure 5 and Figure 6 As shown, the end plate 5 has four symmetrically arranged end plate fixing holes 8. The upper end face of the Pitot tube fixing sleeve 2 has a first hole for corresponding connection with the end plate fixing holes. The end plate fixing holes are fixedly connected to the first hole by screws, which can prevent the Pitot tube locking sleeve 3 from falling off from the top.

[0059] Preferably, the two protective sleeves are evenly spaced on the upper sleeve, so that the upper sleeve is subjected to more uniform force and is less prone to deformation, thereby protecting the extended Pitot tube from deformation.

[0060] The present invention proposes a method for fixing an extended Pitot tube, comprising the following steps:

[0061] Install the measuring hole fixing sleeve 1 vertically on the pre-reserved measuring hole in the flue, lock the measuring hole fixing sleeve 1, then install the Pitot tube fixing sleeve 2 vertically on the inner side wall of the measuring hole fixing sleeve 1, insert the extended Pitot tube into the inner side wall of the Pitot tube fixing sleeve 2, and lock the extended Pitot tube.

[0062] A Pitot tube locking sleeve 3 is installed between the upper sleeve and the measuring hole fixing sleeve 1. The Pitot tube locking sleeve 3 is fitted with the rolling locking steel ball 4 to fasten the extended Pitot tube and realize the fixation of the extended Pitot tube.

[0063] The present invention proposes an extended Pitot tube fixing device and fixing method, which can fix the device itself to the reserved measuring hole on the flue gas duct. The combination of sleeve structure achieves good device fixing effect, simple and flexible structure, convenient carrying, transportation and on-site assembly, and can effectively prevent the extended Pitot tube from shaking or tilting during sampling, thus protecting the test personnel; improving work efficiency and improving the accuracy of measurement data.

[0064] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An extended Pitot tube fixing device, characterized in that, It includes a hole-fixing sleeve (1), a Pitot tube fixing sleeve (2), and a Pitot tube locking sleeve (3). The measuring hole fixing sleeve (1) is vertically installed on the measuring hole reserved in the flue. The Pitot tube fixing sleeve (2) is vertically installed on the inner wall of the measuring hole fixing sleeve (1). The Pitot tube fixing sleeve (2) is a hollow cylindrical structure. The inner wall of the Pitot tube fixing sleeve (2) is fitted with the outer wall of the extended Pitot tube. The Pitot tube fixing sleeve (2) is divided into an upper sleeve and a lower sleeve. A hollow disc is horizontally arranged at the junction of the upper sleeve and the lower sleeve. The outer diameter of the hollow disc is larger than the outer diameter of the measuring hole fixing sleeve (1). The upper sleeve is provided with two protective sleeves along the axial direction. Each protective sleeve is composed of several rolling locking steel balls (4). The rolling locking steel balls (4) are equally spaced and embedded in the upper sleeve. The Pitot tube locking sleeve (3) is installed between the inner wall surface of the measuring hole fixing sleeve (1) and the outer wall surface of the upper sleeve. The inner wall of the Pitot tube locking sleeve (3) is provided with a steel ball extrusion groove (9) that is in clearance fit with the rolling locking steel ball (4), and the diameter of the rolling locking steel ball (4) is greater than the circumference of the Pitot tube fixing sleeve (2). An end plate (5) is horizontally installed above the Pitot tube locking sleeve (3). The end plate (5) has a hollow structure. An annular guide rail groove (7) is opened on the upper end face of the Pitot tube locking sleeve (3). A guide rail boss (6) for engaging with the guide rail groove (7) is installed on the lower wall of the end plate (5).

2. The extended Pitot tube fixing device according to claim 1, characterized in that, The end plate (5) has four symmetrically arranged end plate fixing holes (8). The upper end face of the Pitot tube fixing sleeve (2) has a first hole for corresponding connection with the end plate fixing holes (8). The end plate fixing holes (8) and the first hole are fixed by screws.

3. The extended Pitot tube fixing device according to claim 1, characterized in that, The protective sleeve consists of four rolling locking steel balls (4), each of which is equally spaced and embedded in the upper sleeve.

4. The extended Pitot tube fixing device according to claim 1, characterized in that, The two protective sleeves are evenly spaced on the upper sleeve.

5. A fixing method using the extended Pitot tube fixing device according to any one of claims 1 to 4, characterized in that, Includes the following steps: Install the measuring hole fixing sleeve (1) vertically on the reserved measuring hole in the flue, lock the measuring hole fixing sleeve (1), then install the Pitot tube fixing sleeve (2) vertically on the inner wall of the measuring hole fixing sleeve (1), insert the extended Pitot tube into the inner wall of the Pitot tube fixing sleeve (2), and lock the extended Pitot tube. A Pitot tube locking sleeve (3) is installed between the upper sleeve and the measuring hole fixing sleeve (1). The Pitot tube locking sleeve (3) is fitted with a rolling locking steel ball (4) to fasten the extended Pitot tube and realize the fixation of the extended Pitot tube.

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