Forming device and method for pitot tube machining assembly for runner testing

Abstract

The invention discloses a pitot tube forming device for runner testing. The pitot tube forming device comprises a rotary support, two complete forming blocks, a positioning block, a fixed support and a workbench. A fixed support is arranged on the clamping surface of the workbench; the positioning block is fixed to the fixed support, and an L-shaped pitot tube pipeline assembly to be machined is clamped and fixed through the positioning block; a positioning groove is formed in the side face of the cylinder, and a screw hole penetrates through the middle of the cylinder; the positioning groove of the complete forming block is used for placing a measuring head part of a pitot tube processing assembly; the radiuses of the complete forming blocks and the sizes of the positioning grooves comprise various specifications, and the diameters and the positions of the fixing holes in the positioning blocks are matched with the sizes of the complete forming blocks. According to the device, the positioning block, the complete forming block, the workbench and the rotating handle are assembled in a matched mode, bending of a pitot tube pipeline assembly is achieved, the minimum limit of the bending rate radius of a pitot tube is broken through, the roundness of the bent position of the pitot tube is improved, and the roundness precision of the section of a capillary tube is guaranteed.

Description

TECHNICAL FIELD

[0001] The present scheme relates to the technical field of pitot tube processing assembly, and particularly relates to a pitot tube processing assembly forming device and method for flow channel testing. BACKGROUND

[0002] The pitot tube processing assembly needs to bend capillary tubes with different diameters during development.

[0003] For mass production of pitot tubes, outsourcing processing is adopted: the support rod part is bent by 90 degrees through a precision numerical control bending machine, and a thin core rod (such as nylon or metal core) is inserted into the tube during bending.

[0004] A small amount of pitot tube production is processed internally, and manual bending is adopted, and a thin core rod is inserted into the inside at the same time. This processing method cannot guarantee bending accuracy, and it is difficult and low in efficiency to process a core rod with a diameter of not more than 1 mm.

[0005] The size of the bending radius, the smoothness, and the product quality such as the precision of the included angle between the support rod end and the probe end, the length precision of the probe, and the roundness of the pipe cross section are greatly affected by the conventional production process. SUMMARY

[0006] The present scheme aims to at least solve the technical problems in the prior art. To this end, the first aspect of the present application provides a pitot tube forming device for flow channel testing, which comprises: a rotating support, two complete forming blocks, a positioning block, a fixed support, and a workbench. The clamping surface of the workbench is provided with the fixed support; the positioning block is fixed with the fixed support, and the L-shaped pitot tube pipeline assembly to be processed is clamped and fixed through the positioning block. The complete forming block is a cylinder with a positioning groove on the side and a screw hole in the middle; the two complete forming blocks comprise a first complete forming block and a second complete forming block, the first complete forming block is fixed between the fixed support and the rotating support, and is movably connected with the fixed support and the rotating support. The height of the second complete forming block is the same as that of the first complete forming block, and the second complete forming block is located beside the first complete forming block, and the second complete forming block is fixed on the rotating support. The positioning block comprises a clamping part and a fastening part which can be buckled, and a fixed hole passes through horizontally between the clamping part and the fastening part, and the fixed hole is used for the support rod part of the pitot tube processing assembly to pass through; the positioning groove of the complete forming block is used for placing the probe part of the pitot tube processing assembly. The horizontal height of the positioning groove is consistent with the horizontal height of the fixed hole. The radius of the set of forming blocks, the size of the positioning groove, the diameter and position of the fixing hole on the positioning block are matched with the size of the set of forming blocks.

[0007] Optionally, a first screw hole is formed through the middle of the set of forming blocks, and a fixing screw hole is formed on the fixing support and aligned with the first screw hole. The bottom surface of the first set of forming blocks is movably connected to the fixing support through a first screw passing through the first screw hole, and the top surface of the first set of forming blocks is movably connected to the support end of the rotating support through the first screw. The top surface of the second set of forming blocks is fixed to the rotating support through a second screw.

[0008] Optionally, the fixing support includes a first fixing support that is horizontal to the clamping surface and a second fixing support that is vertical to the clamping surface. The bottom surface of the first set of forming blocks is movably connected to the first fixing support through the fixing screw hole, and the positioning block is fixed on the second fixing support.

[0009] Optionally, the depth of the positioning groove of the set of forming blocks is greater than the radius of the pipeline of the Pitot tube machining assembly.

[0010] The second aspect of the present application provides a method for forming a Pitot tube for flow channel testing, which is applied to the forming device for the Pitot tube for flow channel testing in the first aspect, and the method comprises the following steps: Fixing the fixing support on the clamping surface of the workbench; According to the diameter of the probe part of the Pitot tube machining assembly to be machined and the designed bending radius, a matched first set of forming blocks and a second set of forming blocks are selected; The first set of forming blocks and the second set of forming blocks are fixed and installed between the fixing support and the rotating support, and the bottom surface of the first set of forming blocks is movably connected to the fixing support, the top surface of the first set of forming blocks is movably connected to the rotating support, and the top surface of the second set of forming blocks is fixedly connected to the rotating support; According to the designed length of the probe part of the Pitot tube machining assembly and the designed bending radius, the installation position of the positioning block on the fixing support and the penetration position of the support rod part of the Pitot tube machining assembly in the fixing hole are determined; According to the installation position, the clamping part of the positioning block is fixed on the fixing support, and according to the penetration position, the Pitot tube machining assembly is penetrated into the fixing hole of the clamping part; the fastening part of the positioning block is buckled with the clamping part to fix the Pitot tube machining assembly; Rotating the rotating end of the rotating support to a preset position, and the first set of forming blocks and the second set of forming blocks bend the probe part of the pitot tube machining assembly pipeline assembly to the designed bending radius during the rotation.

[0011] Optionally, the matching first set of forming blocks and the second set of forming blocks are selected according to the pipe diameter of the probe part of the L-shaped pitot tube machining assembly to be machined and the designed bending radius, and the method comprises the following steps. The pipe diameter and the designed bending radius of the probe part of the pitot tube machining assembly to be machined are obtained, and two same sets of forming blocks with a positioning groove depth greater than the pipeline radius of the pitot tube machining assembly and a radius equal to the designed bending radius are selected as the matching first set of forming blocks and the second set of forming blocks.

[0012] Optionally, the first set of forming blocks and the second set of forming blocks are installed and fixed between the fixed support and the rotating support, and the method comprises the following steps. The first screw is screwed into the first screw hole of the first set of forming blocks, and the second screw is screwed into the second screw hole of the second set of forming blocks, so that the first set of forming blocks and the second set of forming blocks are installed and fixed between the fixed support and the rotating support.

[0013] Optionally, the designed length of the probe part is the vertical distance between the starting point and the ending point of the probe part, the installation position of the positioning block on the fixed support and the penetration position of the support rod part of the pitot tube machining assembly in the fixed hole are determined according to the designed length of the probe part of the pitot tube machining assembly and the designed bending radius, and the method comprises the following steps. The length of the bending section of the pitot tube is calculated according to the designed length of the probe part and the designed bending radius. The sum of the length of the bending section, the designed bending radius and a preset reserved length is taken as the target distance between the starting point of the probe part and the positioning block. The position of the positioning block on the fixed support and the penetration position of the support rod part of the pitot tube machining assembly in the fixed hole are determined according to the target distance.

[0014] The embodiment of the application has the following beneficial effects: The pitot tube forming device for flow channel test provided by the embodiment of the present application comprises a rotating support, two complete forming blocks, a positioning block, a fixed support and a workbench; the clamping surface of the workbench is provided with the fixed support; the positioning block is fixed with the fixed support; the L-shaped pitot tube pipeline assembly to be processed is clamped and fixed through the positioning block; the complete forming block is a cylinder with a positioning groove on the side surface and a screw hole penetrating through the middle part; the two complete forming blocks comprise a first complete forming block and a second complete forming block; the first complete forming block is fixed between the fixed support and the rotating support and is movably connected with the fixed support and the rotating support; the height of the second complete forming block is the same as that of the first complete forming block, and the second complete forming block is located beside the first complete forming block and is fixed on the rotating support; the positioning block comprises a clamping part and a fastening part which can be buckled; the clamping part and the fastening part are provided with a fixed hole penetrating through in the horizontal direction; the fixed hole is used for penetrating through the supporting rod part of the pitot tube processing assembly; the positioning groove of the complete forming block is used for placing the measuring head part of the pitot tube processing assembly; the horizontal height of the positioning groove is consistent with the horizontal height of the fixed hole; the radius of the complete forming block and the size of the positioning groove comprise multiple specifications; the hole diameter and the hole position of the fixed hole on the positioning block are matched with the size of the complete forming block. Through the matching assembly of the positioning block, the complete forming block, the workbench and the rotating handle, the bending of the pitot tube pipeline assembly is realized, the minimum limit of the bending curvature radius of the pitot tube is broken, the smoothness of the bent part of the pitot tube is improved, the roundness accuracy of the capillary cross section is ensured, the precise and rapid positioning of the measuring head length of the multi-specification pitot tube is realized, and the coaxiality and straightness of the pitot tube supporting rod are ensured. Moreover, the processing speed is fast, the operation is convenient, and the measuring head length positioning is accurate. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A mechanical structure diagram of a pitot tube forming device for flow channel test provided by the embodiment of the present application; Figure 2 A schematic diagram of a pitot tube pipeline assembly before forming and after forming provided by the embodiment of the present application; Figure 3 A mechanical structure diagram of a positioning block provided by the embodiment of the present application; Figure 4 A mechanical structure diagram of a complete forming block provided by the embodiment of the present application; Figure 5 A step flow chart of a pitot tube forming method for flow channel test provided by the embodiment of the present application; Figure 6 A schematic diagram of an L-shaped pitot tube pipeline assembly provided by the embodiment of the present application. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0017] Hereinafter, the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, the use of "based on" or "according to" means openness and inclusiveness, because the process, step, calculation or other action "based on" or "according to" one or more stated conditions or values can be based on additional conditions or values beyond the stated values in practice.

[0018] Figure 1 A mechanical structure diagram of a pitot tube forming device for flow channel testing is provided.

[0019] As shown in Figure 1 , the device comprises a rotating support 1, two complete forming blocks 2, a positioning block 3, a fixed support 5, and a workbench 6. The clamping surface of the workbench 6 is provided with the fixed support 5; the positioning block 3 is fixed with the fixed support 5, and the L-shaped pitot tube pipeline assembly to be processed is clamped and fixed through the positioning block 3. The complete forming block 2 is a cylinder with a positioning groove 23 on the side surface and a screw hole 24 penetrating the middle part; the two complete forming blocks include a first complete forming block 21 and a second complete forming block 22; the first complete forming block 21 is fixed between the fixed support 5 and the rotating support 1, and is movably connected with the fixed support 5 and the rotating support 1. The height of the second complete forming block 22 is the same as that of the first complete forming block 21, and the second complete forming block 22 is fixed on the rotating support 1. The positioning block 3 includes a clamping part 31 and a fastening part 32 that can be buckled; there is a fixed hole 33 passing through in the horizontal direction between the clamping part 31 and the fastening part 32, and the fixed hole 33 is used for the stem part of the pitot tube processing assembly to pass through; the positioning groove 23 of the complete forming block is used for placing the probe part of the pitot tube processing assembly. The horizontal height of the positioning groove 23 is consistent with the horizontal height of the fixed hole 33. The radius of the set of forming blocks, the size of the positioning groove 23, the hole diameter and hole position of the fixing hole 33 on the positioning block 3 are matched with the size of the set of forming blocks.

[0020] Specifically, the Pitot tube for flow channel test is a classical measuring instrument for calculating the point velocity of fluid by measuring the total pressure and static pressure.

[0021] Figure 2 The schematic diagram of the Pitot tube pipeline assembly before and after forming provided by the embodiment of the present application.

[0022] Referring to Figure 2 , the formed Pitot tube pipeline assembly is generally L-shaped, including a straight rod part and a curved probe part. It is mainly used for measuring the flow rate of a point in a pipeline, wind tunnel or any closed flow channel in flow channel test.

[0023] The to-be-processed (before forming) Pitot tube pipeline assembly is a long straight pipe, which can be processed into an L-shaped Pitot tube by using the Pitot tube forming device of the present application.

[0024] The workbench 6 is the basic platform of the Pitot tube forming device for flow channel test, and the “clamping surface” thereon is a precisely processed reference plane.

[0025] As shown in Figure 1 , the fixed support 5 is installed on the workbench 6 and used for supporting and fixing the first set of forming blocks 21 and the positioning block 3. The positioning block 3 is used for clamping the Pitot tube rod part.

[0026] Figure 3 The mechanical structure diagram of the positioning block provided by the embodiment of the present application.

[0027] As shown in Figure 3 , the positioning block 3 is composed of a clamping part 31 fixed on the fixed support 5 and a fastening part 32 buckled on the clamping part 31. After the clamping part 31 and the fastening part 32 are folded, a fixing hole 33 is formed in the middle. The rod part of the Pitot tube passes through the hole.

[0028] Figure 4 The mechanical structure diagram of the set of forming blocks provided by the embodiment of the present application.

[0029] As shown in Figure 4 , the set of forming blocks 2 is a cylinder with a positioning groove 23 on the side surface and a screw hole 24 passing through the middle part. The positioning groove 23 is a groove processed on the side surface of the cylinder.

[0030] The first set of forming blocks 21 are fixed between the fixed support 5 and the rotating support 1 and are movably connected to the fixed support 5 and the rotating support 1 by screws. In this way, when the rotating support 1 rotates, the first set of forming blocks 21 can rotate as the rotating shaft.

[0031] The second set of forming blocks 22 have the same height as the first set of forming blocks 21 and are located beside the first set of forming blocks 21. The second set of forming blocks 22 are fixed to the rotating support 1. In this way, the rotating support 1 is supported upward, so that the rotating support 1 always remains horizontal during rotation, improving the machining precision.

[0032] The to-be-machined pitot tube pipeline assembly is a straight pipe. When one end of the to-be-machined pitot tube pipeline assembly is attached to the side wall of the positioning groove 23 and the rotating support 1 applies a rotating force to the set of forming blocks, the pitot tube pipeline assembly is machined into an L shape under the action of the rotating force.

[0033] The horizontal height of the positioning groove 23 is consistent with the horizontal height of the fixed hole 33, which can ensure that the side head part and the support part of the pitot tube pipeline assembly are on the same horizontal line when the rotating support 1 drives the pitot tube pipeline assembly to rotate, thereby ensuring the machining precision.

[0034] The radius of the set of forming blocks and the size of the positioning groove 23 include multiple specifications, which can meet the forming of pitot tubes of multiple specifications and angles. By setting multiple different bending radii and pipe diameter standard modules, different specifications required during pitot tube forming can be simulated, helping skilled workers to quickly locate and solve forming problems.

[0035] The radius of the set of forming blocks of different specifications solves the minimum limit (2.5d) of the bending curvature radius of the pitot tube, and realizes a bending curvature radius of 1.5d of the pitot tube.

[0036] In addition, the width of the clamping block of the positioning block 3 of different specifications, the hole diameter and hole size of the part fixing hole 33, realize the accurate and rapid positioning of the length of the measuring head of the pitot tube of multiple specifications, and ensure the coaxiality and straightness of the pitot tube support rod.

[0037] As an optional embodiment, the depth of the positioning groove 23 of the set of forming blocks is greater than the radius of the pipeline of the pitot tube machining assembly.

[0038] The depth of the positioning groove 23 of the set of forming blocks is designed to be greater than the radius of the pipeline of the pitot tube, so that the pipeline of the pitot tube can be placed in the positioning groove 23 as a whole, and extrusion will not occur during rotation, ensuring the roundness precision of the capillary cross section.

[0039] As an alternative embodiment, a first screw hole 24 is formed in the middle of the first set of forming blocks 21, and a fixed screw hole 24 is formed in the first fixed support 51 to align with the first screw hole 24; the bottom surface of the first set of forming blocks 21 is movably connected to the first fixed support 51 through the first screw hole 24; the top surface of the first set of forming blocks 21 is movably connected to the support end of the rotating support 1 through the first screw; and the top surface of the second set of forming blocks 22 is fixed to the rotating support 1 through the second screw.

[0040] Referring to Figure 1 The first set of forming blocks 21 is placed on the top surface of the first fixed support 51. At this time, the first screw hole 24 in the middle of the first set of forming blocks 21 is aligned with the fixed screw hole 24 in the first fixed support 51. The first screw is sequentially inserted from top to bottom through the through hole in the support end of the rotating support 1, the first screw hole 24 in the first set of forming blocks 21, and finally screwed into the fixed screw hole 24 in the first fixed support 51. Due to the gap between the screw and the first screw hole 24, the first set of forming blocks 21 can rotate around the screw axis, but its position in the horizontal and vertical directions is determined.

[0041] The second set of forming blocks 22 is directly placed on the top surface of the support end of the rotating support 1, and the second screw is inserted through the screw hole 24 in the second set of forming blocks 22 from its top surface and then directly screwed into the threaded hole in the top surface of the rotating support 1. When the screw is fully tightened, the second set of forming blocks 22 is firmly pressed against the surface of the rotating support 1. The second set of forming blocks 22 and the rotating support 1 become a rigid whole and cannot move independently relative to the rotating support 1.

[0042] In this way, when the rotating support 1 moves or rotates, the second set of forming blocks 22 will move together, thereby applying a rotating force to the first set of forming blocks 21, allowing the first set of forming blocks 21 to rotate around the first screw as the axis. At this time, if one end of the pitot tube assembly to be processed is attached to the side wall of the positioning groove 23, the pitot tube assembly will be processed into an L shape under the action of the rotation of the first set of forming blocks 21 and the extrusion force of the second set of forming blocks 22.

[0043] As an alternative embodiment, the fixed support 5 includes a first fixed support 51 that is horizontal to the clamping surface and a second fixed support 52 that is vertical to the clamping surface; the bottom surface of the first set of forming blocks 21 is movably connected to the first fixed support 51 through the fixed screw hole 24, and the positioning block 3 is fixed to the second fixed support 52.

[0044] Referring to Figure 1 The first fixed support 51 is horizontal to the clamping surface, and the second fixed support 52 is vertical to the clamping surface.

[0045] The first set of forming block 21 is movably connected on the top surface of the first fixed support 51 by screws, and the horizontal support can provide the maximum support area and stability to ensure that the first forming block, the key support point, will not sink or sway.

[0046] The horizontal through hole 33 of the positioning block 3 is used for the stem part of the Pitot tube processing assembly to pass through, and the positioning block 3 is installed on the vertical second fixed support 52, which can naturally ensure that the through hole 33 in the positioning block 3 is horizontal, which is crucial to ensure the levelness of the stem part during processing.

[0047] The scheme provides a more practical method for the development and production of L-shaped Pitot tubes, has wide practicability, and solves the problem of forming the straight-angle bent metal pipe of the L-shaped Pitot tube. The system sets various bending radius and pipe diameter standard modules to simulate different specifications required during the forming of the Pitot tube, and helps skilled workers to quickly locate and solve the forming problem.

[0048] The advantages are that (1) the length of the measuring head in the processing and development of the L-shaped Pitot tube can be quickly and accurately positioned; (2) the index of the included angle of 90°±2° with the stem can be accurately realized, avoiding manual errors; (3) the consistency of the curvature radius at the bending part is realized, and it is smooth; (4) the roundness of the static pressure pipe is ensured, and the deformation of the pipe cross section is prevented.

[0049] The device realizes the vertical relationship between the stem and the measuring head end of the Pitot tube for flow channel testing by installing the pipe forming block set on the fixed support 5 on the workbench 6. Through the matching assembly of the positioning block 3, the set forming block, the workbench 6 and the rotating handle on the Pitot tube forming device, the bending of the capillary tube with a small curvature radius is realized. The specially designed forming block can realize the curvature radius 1.5R index requirement of the bending part of the Pitot tube measuring head and the stem, and solve the problem of capillary tube forming in limited space during the development of the Pitot tube. The device is also suitable for the multi-angle bending of capillary tubes in the development of total pressure, static pressure and other measuring devices with different shapes, and can be expanded to different angle forming of pipes in various complex environments such as machine and ground.

[0050] The device improves the smoothness of the bending part of the Pitot tube, and the wrinkles and obvious flattening caused by the bending of the Pitot tube. The device and method are used for processing the Pitot tube, which is fast in speed, convenient in operation, and accurate in positioning the length of the measuring head. The work efficiency is improved by about 60% compared with the previous device and method.

[0051] In summary, the flow channel test pitot tube forming device provided by the embodiment of the application, the device comprises: a rotating support 1, two complete forming blocks, a positioning block 3, a fixed support 5, a workbench 6; the clamping surface of the workbench 6 is provided with the fixed support 5; the positioning block 3 is fixed with the fixed support 5, and the L-shaped pitot tube pipeline assembly to be processed is clamped and fixed through the positioning block 3; the complete forming block is a cylinder with a positioning groove 23 on the side and a threaded hole 24 penetrating the middle; the two complete forming blocks comprise a first complete forming block 21 and a second complete forming block 22, the first complete forming block 21 is fixed between the fixed support 5 and the rotating support 1 and is movably connected with the fixed support 5 and the rotating support 1; the height of the second complete forming block 22 is the same as that of the first complete forming block 21, and the second complete forming block 22 is located beside the first complete forming block 21 and is fixed on the rotating support 1; the positioning block 3 comprises a clamping part 31 and a fastening part 32 that can be buckled, and a fixed hole 33 penetrating in the horizontal direction is arranged between the clamping part 31 and the fastening part 32, and the fixed hole 33 is used for the stem part of the pitot tube processing assembly to pass through; the positioning groove 23 of the complete forming block is used for placing the probe part of the pitot tube processing assembly; the horizontal height of the positioning groove 23 is consistent with the horizontal height of the fixed hole 33; the radius of the complete forming block and the size of the positioning groove 23 comprise multiple specifications, and the hole diameter and hole position of the fixed hole 33 on the positioning block 3 are matched with the size of the complete forming block. The matching assembly of the positioning block 3, the complete forming block, the workbench 6 and the rotating handle realizes the bending of the pitot tube pipeline assembly, breaks through the minimum limit of the bending curvature radius of the pitot tube, improves the smoothness of the bending part of the pitot tube, guarantees the roundness accuracy of the capillary cross section, realizes the accurate and rapid positioning of the probe length of the multi-specification pitot tube, and ensures the coaxiality and straightness of the pitot tube stem. Moreover, the processing speed is fast, the operation is convenient, and the probe length positioning is accurate.

[0052] Figure 5 A flow channel test pitot tube forming method provided by the embodiment of the application is provided. Figure 1 The method is applied to the flow channel test pitot tube forming device in the embodiment of the application, and the method comprises the following steps. Step 101, fixing the fixed support 5 on the clamping surface of the workbench 6.

[0053] The fixed support 5 is firmly installed on the clamping surface of the workbench 6.

[0054] The fixed support 5 is the installation reference of all other components (the positioning block 3 and the forming block), and ensures that the fixed support 5 is correctly fixed, so that the coordinate system of the whole device is accurate and stable.

[0055] Step 102, according to the tube diameter and the design bending radius of the probe portion of the L-shaped pitot tube processing assembly to be processed, select the matched first set of forming blocks 21 and the second set of forming blocks 22.

[0056] The tube diameter of the probe portion determines the size of the positioning groove 23 on the set of forming blocks. The first set of forming blocks 21 and the second set of forming blocks 22 with the depth of the positioning groove 23 closely matched with the tube diameter must be selected to achieve effective support without damaging the tube. Generally, the depth of the positioning groove 23 of the set of forming blocks should be greater than the tube diameter of the probe portion of the pitot tube processing assembly.

[0057] The design bending radius of the probe portion determines the radius of the set of forming blocks. The radius of the first set of forming blocks 21 and the second set of forming blocks 22 should be consistent or very close to the design bending radius of the probe portion of the pitot tube. When the probe portion is placed in the positioning grooves 23 of the two sets of forming blocks and is formed with the rotation of the rotating support 1, the bending radius formed is determined by the radius of the two sets of forming blocks.

[0058] According to the tube diameter and the design bending radius of the probe portion of the L-shaped pitot tube processing assembly to be processed, select the matched first set of forming blocks 21 and the second set of forming blocks 22, which can realize the modularity and universality of the device. By replacing different specifications of the set of forming blocks, a set of devices can support a variety of different sizes of pitot tube forming.

[0059] Step 103, install and fix the first set of forming blocks 21 and the second set of forming blocks 22 between the fixed support 5 and the rotating support 1, and make the bottom surface of the first set of forming blocks 21 movably connected with the fixed support 5, the top surface of the first set of forming blocks 21 movably connected with the rotating support 1, and the top surface of the second set of forming blocks 22 fixedly connected with the rotating support 1.

[0060] Install the selected first set of forming blocks 21 and the second set of forming blocks 22 between the fixed support 5 and the rotating support 1.

[0061] The specific connection mode is that the bottom surface of the first set of forming blocks 21 is movably connected with the fixed support 5, and the top surface is movably connected with the rotating support 1, so that the first set of forming blocks 21 can freely rotate; the top surface of the second set of forming blocks 22 is fixedly connected with the rotating support 1, that is, the second set of forming blocks 22 and the rotating support 1 become one body.

[0062] Step 104, according to the design length of the probe portion of the pitot tube processing assembly and the design bending radius, determine the installation position of the positioning block 3 on the fixed support 5 and the penetration position of the strut portion of the pitot tube processing assembly in the fixed hole 33.

[0063] By the design length and the design bending radius of the probe part, the installation position of the positioning block 3 on the fixed support 5 and the penetration position of the strut part of the pitot tube processing assembly in the fixed hole 33 can be accurately calculated.

[0064] This calculation determines how far the positioning block 3 should be installed from the first set of forming blocks 21 and from which position the strut part needs to penetrate into the fixed hole 33.

[0065] Step 105, according to the installation position, the clamping part 31 of the positioning block 3 is fixed on the fixed support 5, and according to the penetration position, the pitot tube processing assembly is penetrated into the fixed hole 33 of the clamping part 31; the fastening part 32 of the positioning block 3 is buckled with the clamping part 31 to fix the pitot tube processing assembly.

[0066] According to the "installation position" calculated in the last step, the clamping part 31 of the positioning block 3 is fixed on the fixed support 5, and the strut part of the pitot tube is penetrated into the fixed hole 33 of the clamping part 31 according to the calculated "penetration position", and the fastening part 32 of the positioning block 3 is buckled on the clamping part 31 to tightly clamp the strut part.

[0067] Step 106, the rotating end of the rotating support 1 is rotated to a preset position, and in the rotating process, the first set of forming blocks 21 and the second set of forming blocks 22 bend the probe part of the pitot tube processing assembly pipeline assembly to the design bending radius.

[0068] The rotating support 1 is rotated to a preset position. In this process, the two sets of forming blocks will work together to naturally bend the probe part of the pitot tube to the required bending radius and clamp it.

[0069] Specifically, before the rotating support 1 is rotated, the probe part of the pitot tube is just placed on the first set of forming blocks 21, and the operator starts to rotate the rotating support 1. Since the second set of forming blocks 22 is fixed on the rotating support 1, it will move towards the first set of forming blocks 21.

[0070] In the process of continuing to rotate, the probe part is fitted in the positioning groove 23 between the two sets of forming blocks, and the two sets of forming blocks naturally bend the probe part to a certain arc until the rotating support 1 reaches the preset position.

[0071] The "preset position" is a mechanical limit, which corresponds to a specific bending radius that the set of forming blocks can achieve. When the rotating support 1 reaches this position, the probe part is also bent to the design bending radius (usually a 90-degree right-angle arc).

[0072] As an optional embodiment, step 102 includes: The tube diameter and the design bending radius of the probe part of the Pitot tube processing assembly to be processed are obtained, two identical set forming blocks with the depth of the positioning groove 23 greater than the tube radius of the Pitot tube processing assembly and the radius equal to the design bending radius are selected as the matched first set forming block 21 and the second set forming block 22.

[0073] The depth of the positioning groove 23 of the set forming block is designed to be greater than the radius of the tube of the Pitot tube, so that the tube of the Pitot tube can be placed in the positioning groove 23 as a whole, and extrusion is not generated in the rotating process, thereby ensuring the roundness accuracy of the capillary section.

[0074] The set forming block with the same radius as the design bending radius is used, thereby ensuring the high accuracy of the bending radius of the probe part of the Pitot tube.

[0075] When the two cylinders with the radius equal to the design bending radius R are placed side by side to form the set forming block, the outer contour shape of the two cylinders naturally defines a bending track with the radius R, so that the bending radius of the probe part formed is R.

[0076] As an optional embodiment, the installation and fixation of the first set forming block 21 and the second set forming block 22 between the fixed support 5 and the rotating support 1 in step 103 comprises: The first screw is screwed into the first screw hole 24 of the first set forming block 21, and the second screw is screwed into the second screw hole 24 of the second set forming block 22, so that the first set forming block 21 and the second set forming block 22 are installed and fixed between the fixed support 5 and the rotating support 1.

[0077] Through the installation of the first screw and the second screw, the first set forming block 21 can be fixed between the fixed support 5 and the rotating support 1 and movably connected with the fixed support 5 and the rotating support 1, and the second set forming block 22 can be fixed on the rotating support 1.

[0078] As an optional embodiment, the design length of the probe part is the vertical distance between the starting point and the ending point of the probe part, and step 104 comprises: Step 1041, the length of the bending section of the Pitot tube is calculated according to the design length of the probe part and the design bending radius.

[0079] Figure 6 A schematic diagram of an L-shaped Pitot tube tube assembly provided by the embodiment of the present application is shown.

[0080] As shown in Figure 6 , the bending section of the L-shaped Pitot tube tube assembly is the probe part, and the straight section is the strut part, and a part of the strut part is in the positioning block 3. The length of the bending section of the Pitot tube is the curve length between the starting point of the probe part and the starting point of the strut part.

[0081] The design length a of the side head portion is the vertical distance between the start point and the end point of the head portion. The design bend radius is R. Thus, the length of the curved segment of the pitot tube is L1=a-R+πR / 4.

[0082] Step 1042, the sum of the length of the curved segment, the design bend radius, and the preset reserved length is taken as the target distance between the start point of the side head portion and the positioning block 3.

[0083] As shown in Figure 6 the distance between the end point of the head portion and the positioning block 3 is d, and according to the design requirement, d=R+10mm. Among them, 10mm is the preset reserved length.

[0084] Thus, the target distance between the start point of the head portion and the positioning block 3 is: L2=L1+d=a-R+πR / 4+R+10mm=a+πR / 4+10mm Step 1043, the position of the positioning block 3 on the fixed support 5 and the penetration position of the strut portion of the pitot tube processing assembly in the fixed hole 33 are determined according to the target distance.

[0085] Thus, the position of the positioning block 3 is at the distance L2 from the start point of the side head portion to the strut portion, that is, the position of the positioning block 3 is at the target distance from the start point of the side head portion to the strut portion.

[0086] And the penetration position of the strut portion in the fixed hole 33 is also at the target distance from the start point of the side head portion to the strut portion.

[0087] ​​​​​​​​​​​​​​​​In summary, the pitot tube forming method for flow channel test provided by the embodiment of the application fixes the fixed support 5 on the clamping surface of the workbench 6; according to the pipe diameter of the probe part of the pitot tube processing assembly to be processed and the design bending radius, the matched first complete forming block 21 and the second complete forming block 22 are selected; the first complete forming block 21 and the second complete forming block 22 are fixed and installed between the fixed support 5 and the rotating support 1, and the bottom surface of the first complete forming block 21 is movably connected with the fixed support 5, the top surface of the first complete forming block 21 is movably connected with the rotating support 1, and the top surface of the second complete forming block 22 is fixedly connected with the rotating support 1; according to the design length of the probe part of the pitot tube processing assembly and the design bending radius, the installation position of the positioning block 3 on the fixed support 5 is determined, and the penetration position of the supporting rod part of the pitot tube processing assembly in the fixed hole 33 is determined; the clamping part 31 of the positioning block 3 is fixed on the fixed support 5 according to the installation position, and the pitot tube processing assembly is penetrated into the fixed hole 33 of the clamping part 31 according to the penetration position; the fastening part 32 of the positioning block 3 is buckled with the clamping part 31 to fix the pitot tube processing assembly; the rotating end of the rotating support 1 is rotated to a preset position, and in the rotating process, the first complete forming block 21 and the second complete forming block 22 bend the probe part of the pitot tube pipeline assembly to the design bending radius. The method realizes the bending of the pitot tube pipeline assembly through the matched assembly of the positioning block 3, the complete forming block, the workbench 6 and the rotating handle, breaks through the minimum limit of the bending curvature radius of the pitot tube, improves the smoothness of the bending part of the pitot tube, guarantees the roundness accuracy of the capillary tube section, realizes the accurate and rapid positioning of the probe length of the pitot tube of multiple specifications, and ensures the coaxiality and straightness of the supporting rod of the pitot tube. Moreover, the processing speed is fast, the operation is convenient, and the probe length positioning is accurate.

[0088] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, the processes of the above-mentioned embodiments of the methods can be included. Any reference to memory, storage, databases, or other media in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in many forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0089] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure that are deemed to fall within the general principles of the disclosure and include commonly known or customary practice in the art. The specification and examples are to be considered exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

[0090] It should be understood that the present disclosure is not limited to the precise structures herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A pitot tube forming device for flow passage testing, characterized by, The device comprises a rotating support, two sets of forming blocks, a positioning block, a fixed support and a workbench; The clamping surface of the workbench is provided with the fixed support; the positioning block is fixed with the fixed support, and the L-shaped pitot tube pipeline assembly to be processed is clamped and fixed through the positioning block; The set of forming blocks are cylindrical bodies with a positioning groove on the side surface and a screw hole penetrating through the middle part; the two sets of forming blocks comprise a first set of forming blocks and a second set of forming blocks; the first set of forming blocks is fixed between the fixed support and the rotating support and is movably connected with the fixed support and the rotating support; The height of the second set of forming blocks is the same as that of the first set of forming blocks, and the second set of forming blocks is located beside the first set of forming blocks and is fixed on the rotating support; The positioning block comprises a clamping part and a fastening part which can be buckled; the clamping part and the fastening part are provided with a fixed hole penetrating through in the horizontal direction, and the fixed hole is used for penetrating through the support rod part of the pitot tube processing assembly; the positioning groove of the set of forming blocks is used for placing the probe part of the pitot tube processing assembly; The horizontal height of the positioning groove is consistent with the horizontal height of the fixed hole; The radius of the set of forming blocks and the size of the positioning groove comprise multiple specifications; the hole diameter and the hole position of the fixed hole on the positioning block are matched with the size of the set of forming blocks.

2. The apparatus of claim 1, wherein, The middle part of the set of forming blocks is provided with a first screw hole, and the fixed support is provided with a fixed screw hole aligned with the first screw hole; The bottom surface of the first set of forming blocks is movably connected to the fixed support through a first screw penetrating through the first screw hole; the top surface of the first set of forming blocks is movably connected to the support end of the rotating support through the first screw; The top surface of the second set of forming blocks is fixed to the rotating support through a second screw.

3. The apparatus of claim 2, wherein, The fixed support comprises a first fixed support horizontal to the clamping surface and a second fixed support vertical to the clamping surface; The bottom surface of the first set of forming blocks is movably connected to the first fixed support through the fixed screw hole, and the positioning block is fixed on the second fixed support.

4. The apparatus of claim 1, wherein, The depth of the positioning groove of the set of forming blocks is greater than the pipeline radius of the pitot tube processing assembly.

5. A method of forming a pitot tube for flow channel testing, the method comprising: The method is applied to the pitot tube forming device for flow channel test in claim 1, and the method comprises: Fixing the fixed support on the clamping surface of the workbench; Selecting matched first and second sets of forming blocks according to the pipe diameter of the probe part of the pitot tube processing assembly to be processed and the designed bending radius; Fixing the first and second sets of forming blocks between the fixed support and the rotating support, movably connecting the bottom surface of the first set of forming blocks to the fixed support, movably connecting the top surface of the first set of forming blocks to the rotating support, and fixedly connecting the top surface of the second set of forming blocks to the rotating support; Determining the installation position of the positioning block on the fixed support and the penetration position of the support rod part of the pitot tube processing assembly in the fixed hole according to the designed length of the probe part of the pitot tube processing assembly and the designed bending radius; According to the mounting position, the clamping part of the positioning block is fixed on the fixed support, and the pitot tube processing assembly is inserted into the fixed hole of the clamping part according to the insertion position; the fastening part of the positioning block is buckled with the clamping part to fix the pitot tube processing assembly; The rotating end of the rotating support is rotated to a preset position, and in the rotating process, the first set of forming blocks and the second set of forming blocks bend the probe part of the pipeline assembly of the pitot tube processing assembly to the designed bending radius.

6. The method of claim 5, wherein, According to the pipe diameter and the designed bending radius of the probe part of the L-shaped pitot tube processing assembly to be processed, the matched first set of forming blocks and the second set of forming blocks are selected, which comprises: The pipe diameter and the designed bending radius of the probe part of the pitot tube processing assembly to be processed are obtained, and two identical sets of forming blocks with a positioning groove depth greater than the pipeline radius of the pitot tube processing assembly and a radius equal to the designed bending radius are selected as the matched first set of forming blocks and the second set of forming blocks.

7. The method of claim 5, wherein, The first set of forming blocks and the second set of forming blocks are mounted and fixed between the fixed support and the rotating support, which comprises: The first screw is screwed into the first screw hole of the first set of forming blocks, and the second screw is screwed into the second screw hole of the second set of forming blocks, so that the first set of forming blocks and the second set of forming blocks are mounted and fixed between the fixed support and the rotating support.

8. The method of claim 5, wherein, The designed length of the probe part is the vertical distance between the starting point and the ending point of the probe part, and according to the designed length of the probe part of the pitot tube processing assembly and the designed bending radius, the mounting position of the positioning block on the fixed support and the insertion position of the strut part of the pitot tube processing assembly in the fixed hole are determined, which comprises: According to the designed length of the probe part and the designed bending radius, the length of the bending section of the pitot tube is calculated; The sum of the length of the bending section, the designed bending radius and a preset reserved length is taken as the target distance between the starting point of the probe part and the positioning block; According to the target distance, the position of the positioning block on the fixed support and the insertion position of the strut part of the pitot tube processing assembly in the fixed hole are determined.

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