Fixing device for pitot tube

Abstract

The utility model provides a fixing device for a pitot tube, relates to the field of fixing for pitot tubes, and adopts the technical scheme that the fixing device comprises a supporting seat, a supporting frame is horizontally arranged on the supporting seat, the supporting frame is of a U-shaped structure and is made of elastic materials, two clamping rollers are vertically arranged on the inner side of an opening of the supporting frame, and the two clamping rollers are arranged on the supporting seat. The two clamping rollers can abut against the outer circumferential face of the pitot tube. The pitot tube fixing device can replace a human hand to fix the pitot tube and is convenient to use.

Description

Technical Field

[0001] The utility model relates to the field of fixing for pitot tubes, in particular to a fixing device for pitot tubes. Background Art

[0002] A pitot tube, also known as an airspeed tube or a wind speed tube, is a fluid mechanics experimental instrument mainly used for measuring the flow velocity of a fluid (such as air or water) at a certain point, and then deriving the fluid flow rate. It usually consists of a double-layer casing with a round head. A row of static pressure holes are opened on the outer casing, and a total pressure hole is provided at the head of the inner casing. When the pitot tube is inserted into the fluid, the total pressure hole measures the total pressure of the fluid (the sum of dynamic pressure and static pressure), while the static pressure holes measure the static pressure of the fluid. By measuring these two pressure values and applying Bernoulli's equation, the flow velocity of the fluid at the measurement point can be calculated.

[0003] When using a pitot tube to measure the flow velocity of air flow, liquid or fluid with solid particles, first select a suitable model and specification according to the properties, flow velocity and measurement range of the fluid. During measurement, it is necessary to manually insert the pitot tube into the fluid and fix it by hand to ensure that it is perpendicular to the pipeline, and the insertion depth is between 1 / 2 and 2 / 3 of the pipeline diameter, while avoiding the pitot tube being close to the pipe wall.

[0004] Fixing the pitot tube by hand, on the one hand, it is impossible to ensure that the orifice of the pitot tube is directly facing the flow direction of the liquid or gas, resulting in a certain angle between the orifice of the pitot tube and the flow direction of the liquid or gas in the horizontal or vertical direction, causing certain errors in the measurement data. On the other hand, since the operator needs to hold the pitot tube for a period of time during measurement, the pitot tube shakes during measurement, unable to guarantee the measurement accuracy, and increasing the labor intensity of the operator. Content of the Utility Model

[0005] In order to solve the technical problems in the above-mentioned prior art that the measurement accuracy and measurement intensity are affected by fixing the pitot tube by hand, the utility model provides a fixing device for pitot tubes, which can replace manual fixing of the pitot tube and is convenient to use.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a fixing device for pitot tubes, including a support base, a support frame is horizontally arranged on the support base, the support frame is of a U-shaped structure, the support frame is made of an elastic material, two clamping rollers are vertically and rotatably arranged on the inner side of the opening of the support frame, and the two clamping rollers can be in contact with the outer circumferential surface of the pitot tube. A pull belt is arranged on the support base, one end of the pull belt is detachably connected to the support base, and during measurement, the pull belt surrounds the pipeline to be measured.

[0007] By providing a support frame and clamping rollers, the utility model can clamp the pitot tube inside the inner cavity of the support frame. The two clamping rollers and the pitot tube form a triangular clamping structure, which is stable and reliable in clamping, not easy to slip off, and only needs to press the pitot tube from the opening to complete the clamping, making the installation convenient.

[0008] Furthermore, mounting brackets are oppositely arranged on the inner side of the opening of the support frame. The mounting brackets include two mounting rods which are arranged along the axial direction of the clamping rollers. The extending direction of the mounting rods is the same as the opening direction of the support frame. Mounting holes are provided at the ends of the mounting rods, and rotating shafts are respectively arranged at both ends of the clamping rollers. The rotating shafts are rotatably arranged in the mounting holes.

[0009] Furthermore, the support frame is made of spring steel material.

[0010] Furthermore, a rubber protective layer is arranged on the outer circumference of the clamping rollers.

[0011] Furthermore, the support base is of an L-shaped structure. The support base includes a bottom plate and a support plate. The bottom plate is of an arc-shaped structure and can be attached to the outer wall of the pipeline to be measured. An avoidance groove is provided on the bottom plate. During measurement, the pitot tube penetrates through the avoidance groove. The support frame is arranged on the support plate, and the pull belt is arranged on the bottom plate.

[0012] Furthermore, a length adjustment buckle is arranged on the pull belt.

[0013] By providing a length adjustment buckle, the utility model can adjust the length of the pull belt to ensure tight fitting during installation on pipelines to be measured with various diameters.

[0014] Furthermore, the support frame is movably arranged on the support plate. The moving direction of the support frame is consistent with the axial direction of the pitot tube, and scales are arranged on the support plate.

[0015] By movably arranging the support frame, the utility model can adjust the fixing position of the pitot tube according to various measurement requirements, making the use more flexible.

[0016] Furthermore, a lead screw is rotatably arranged on the support plate. A lead screw nut seat is arranged on the lead screw, and the lead screw nut seat is connected to the support frame.

[0017] It can be seen from the above technical solutions that the utility model has the following advantages:

[0018] The utility model provides a fixing device for a Pitot tube. By arranging a support frame and clamping rollers, the Pitot tube can be clamped in the inner cavity of the support frame. The two clamping rollers and the Pitot tube form a triangular clamping structure, which is stable and reliable in clamping, not easy to slip off, and only needs to press the Pitot tube from the opening to complete the clamping, so the installation is convenient; by arranging a length adjustment buckle, the length of the pull belt can be adjusted to ensure tight fit when installing on measuring pipes with various diameters; by making the support frame movable, the fixing position of the Pitot tube can be adjusted according to various measurement requirements, and the use is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the first specific embodiment of the present utility model.

[0021] Figure 2 It is a schematic structural diagram of the support frame in the first specific embodiment of the present utility model.

[0022] Figure 3 It is a schematic structural diagram of the support base in the first specific embodiment of the present utility model.

[0023] Figure 4 It is a schematic structural diagram of the second specific embodiment of the present utility model.

[0024] In the figure, 1, support base; 2, clamping roller; 3, support frame; 4, mounting rod; 5, avoidance groove; 6, pull belt; 7, lead screw; 8, nut seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the purpose, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only some embodiments of the present utility model, not all embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this patent. The First Specific Embodiment

[0027] As Figure 1 and Figure 2As shown in the figure, this specific embodiment provides a fixing device for a Pitot tube, which includes a support base 1, a pull strap 6, and a support frame 3. A support frame 3 is horizontally arranged on the support base 1. The support frame 3 has a U-shaped structure, and the opening of the support frame 3 faces one side. The support frame 3 is made of an elastic material. Two clamping rollers 2 are vertically and rotatably arranged on the inner side of the opening of the support frame 3. The two clamping rollers 2 can abut against the outer circumferential surface of the Pitot tube. A pull strap 6 is arranged on the support base 1. One end of the pull strap 6 is detachably connected to the support base 1. During measurement, the pull strap 6 surrounds the pipeline to be measured.

[0028] In this specific embodiment, by setting the support frame 3 and the clamping rollers 2, the Pitot tube can be clamped in the inner cavity of the support frame 3. The two clamping rollers 2 and the Pitot tube form a triangular clamping structure, with stable and reliable clamping, not easy to slip off. And the Pitot tube can be clamped only by pressing it into the opening, which is convenient for installation. At the same time, it is fixed on the pipeline to be measured through the pull strap 6, with firm fixation.

[0029] As Figure 1 and Figure 2 shown, in this specific embodiment, mounting brackets are oppositely arranged on the inner side of the opening of the support frame 3. The mounting brackets include two mounting rods 4. The mounting rods 4 are arranged along the axial direction of the clamping rollers 2. The extending direction of the mounting rods 4 is the same as the opening direction of the support frame 3. Mounting holes are arranged at the ends of the mounting rods 4. Rotating shafts are respectively arranged at both ends of the clamping rollers 2, and the rotating shafts are rotatably arranged in the mounting holes. The support frame 3 is made of spring steel material. In order not to scratch the Pitot tube, a rubber protective layer is arranged on the outer circumference of the clamping rollers 2.

[0030] As Figure 1 and Figure 3 shown, in this specific embodiment, the support base 1 can adopt the following specific structure: The support base 1 has an L-shaped structure. The support base 1 includes a bottom plate and a support plate. The bottom plate has an arc-shaped structure, and the bottom plate can be attached to the outer wall of the pipeline to be measured. An avoidance groove 5 is arranged on the bottom plate. During measurement, the Pitot tube penetrates through the avoidance groove 5. The support frame 3 is arranged on the support plate through bolts. The pull strap 6 is arranged on the bottom plate through a pin shaft. The other end of the pull strap 6 is provided with a buckle that can be detachably connected to the groove on the bottom plate. In order to adapt to pipelines to be measured with various diameters, a length adjustment buckle is arranged on the pull strap 6. The length adjustment buckle adopts a figure-eight buckle. By setting the length adjustment buckle, the length of the pull strap 6 can be adjusted to ensure tight fit during installation on pipelines to be measured with various diameters. Specific Embodiment Two

[0032] As Figure 4As shown, the structure of this specific embodiment is basically the same as that of the first specific embodiment, except that when measuring pipes to be measured with different diameters, the insertion depth of the pitot tube changes. To facilitate the adjustment of the insertion depth of the pitot tube, in this specific embodiment, the support frame 3 is movably arranged on the support plate, and the moving direction of the support frame 3 is consistent with the axial direction of the pitot tube. A scale is arranged on the support plate.

[0033] For the convenience of operation, in this specific embodiment, a lead screw 7 is rotatably arranged on the support plate through a bearing. A nut seat 8 is arranged on the lead screw 7, and the nut seat 8 is connected to the support frame 3. A handle is arranged at the upper end of the lead screw 7.

[0034] It can be seen from the above specific embodiments that the present utility model has the following beneficial effects:

[0035] 1. By arranging the support frame 3 and the clamping rollers 2, the pitot tube can be clamped in the inner cavity of the support frame 3. The two clamping rollers 2 and the pitot tube form a triangular clamping structure, which is stable and reliable in clamping, not easy to slip off, and the pitot tube can be clamped only by pressing it in from the opening, so the installation is convenient;

[0036] 2. By arranging the length adjustment buckle, the length of the pull belt 6 can be adjusted to ensure close fit when installed on pipes to be measured with various diameters;

[0037] 3. By arranging the support frame 3 to be movable, the fixed position of the pitot tube can be adjusted according to various measurement requirements, and the use is more flexible.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fixing device for a pitot tube, comprising a support seat (1), characterized in that: A support frame (3) is horizontally arranged on the support seat (1), the support frame (3) is in a U-shaped structure, the support frame (3) is made of elastic material, two clamping rollers (2) are vertically and rotatably arranged on the inner side of the opening of the support frame (3), the two clamping rollers (2) can abut against the outer circumferential surface of the Pitot tube, a pull belt (6) is arranged on the support seat (1), one end of the pull belt (6) is detachably connected to the support seat (1), and during measurement, the pull belt (6) surrounds the pipe to be measured.

2. The fixing device for the Pitot tube according to claim 1, characterized in that: A mounting frame is arranged opposite to the inner side of the opening of the support frame (3), and the mounting frame comprises two mounting rods (4). The mounting rods (4) are arranged along the axial direction of the clamping roller (2), and the extension direction of the mounting rods (4) is the same as the opening direction of the support frame (3). The ends of the mounting rods (4) are arranged with mounting holes, and the two ends of the clamping roller (2) are respectively arranged with rotating shafts, and the rotating shafts are rotatably arranged in the mounting holes.

3. The fixing device for the Pitot tube according to claim 2, characterized in that: The support frame (3) is made of spring steel.

4. The fixing device for the Pitot tube according to claim 3, characterized in that: The outer circumference of the clamping roller (2) is provided with a rubber protective layer.

5. The fixing device for the Pitot tube according to any one of claims 1 to 4, characterized in that: The support base (1) is in an L-shaped structure, comprising a base plate and a support plate, the base plate being in an arc-shaped structure, the base plate being able to abut against the outer wall of the pipe to be measured, an avoidance groove (5) being arranged on the base plate, during measurement, the Pitot tube passes through the avoidance groove (5), the support frame (3) being arranged on the support plate, and a pull belt (6) being arranged on the base plate.

6. The fixing device for the Pitot tube according to claim 5, characterized in that: The drawstring (6) is provided with a length adjustment buckle.

7. The fixing device for the Pitot tube according to claim 5, characterized in that: The support frame (3) is movably arranged on the support plate, the moving direction of the support frame (3) is consistent with the axial direction of the Pitot tube, and the support plate is provided with a scale.

8. The fixing device for the Pitot tube according to claim 7, characterized in that: A lead screw (7) is rotatably arranged on the support plate, a nut seat (8) is arranged on the lead screw (7), and the nut seat (8) is connected to the support frame (3).

Images