Flowmeter coil auxiliary positioning tool
By designing an auxiliary positioning fixture for the flow meter coil and using the concave arc surface of the cylinder to fix the position of the bend, the problem of difficulty in fixing the parallel bend of the coil in a micro mass flow meter is solved, thus improving welding accuracy and metering performance.
Patent Information
- Application Number
- CN202423242164.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In miniature mass flow meters, it is difficult to fix the parallel bend of the medium pipeline coil, resulting in uneven pipe center distance, which affects welding accuracy and metering performance.
Design an auxiliary positioning fixture for a flowmeter coil. It adopts a cylindrical structure with a concave arc surface on the side of the cylinder. The geometric center distance of the arc surface is equal to the center distance of the parallel bend in the coil. It is used to fix the position of the bend before welding. The cylinder can be cut to form a gap for installing the coil components.
It improves the welding accuracy of pipe bends and the metering performance of flow meters, meeting the requirements of miniaturization and lightweighting.
Smart Images
Figure CN223643121U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to mechanical technical field relates to coil positioning technology, specifically relates to a flowmeter coil auxiliary positioning frock. BACKGROUND
[0002] The medium pipeline coil in the micro mass flowmeter is parallel design, including two groups of completely parallel elbow pipes and the communicating pipe connecting the two elbow pipes, for the purpose of flow detection, the parallelism of the two groups of elbow pipes is required to be high, the pipe center distance of the two groups of elbow pipes is required to be completely equal everywhere, the elbow pipe is welded and fixed through the flange of the communicating pipe and the elbow pipe end or the flowmeter box body, in the flowmeter production process, the position of the elbow pipe is difficult to fix, so that the pipe center distance is difficult to guarantee uniformity, and the fixing of the coil magnetic steel needs the support of the support, and the miniaturization and light weight are required. CONTENT
[0003] In order to overcome the technical defects existing in the prior art, the utility model discloses a flowmeter coil auxiliary positioning frock.
[0004] The flowmeter coil auxiliary positioning frock, including the cylinder, the inner recessed arc surface of two is arranged on the side wall of the cylinder, the geometric center connecting line of the arc surface is parallel with the cylinder central axis, and the geometric center spacing of the arc surface is equal to the pipe center distance of the parallel elbow pipe in the coil.
[0005] Preferably, the cylinder is a hollow pipe, and the hollow pipe can be a precision stainless steel capillary tube.
[0006] Preferably, the cylinder includes a cutting line, and grooves or holes are distributed on the cutting line; the grooves serve as positioning grooves and have the functions of positioning and increasing the welding surface.
[0007] Preferably, the radius of curvature of the arc surface is the same as the radius of the parallel elbow pipe.
[0008] Preferably, the cutting line has two.
[0009] The flowmeter coil auxiliary positioning frock can keep the pipe center distance of the elbow pipe unchanged before the elbow pipe and the flange are fixed, so that the welding precision of the flowmeter elbow pipe and the flowmeter measurement performance are improved. DRAWINGS
[0010] Figure 1 It is a specific embodiment schematic view of the flowmeter coil auxiliary positioning frock;
[0011] Figure 2 It is a specific embodiment schematic view of the flowmeter coil auxiliary positioning frock welded on the parallel elbow pipe;
[0012] The figure mark names are: 1-cylinder, 2-arc surface, 3-parallel elbow, 4-cutting line. DETAILED DESCRIPTION
[0013] The specific embodiment of the utility model is further explained in detail below. Figure 1 The specific embodiment of the utility model is further explained in detail below.
[0014] The flowmeter coil auxiliary positioning tool, comprising a cylinder 1, the cylinder side wall has two concave arc surfaces 2, the geometric center connecting line of the arc surface is parallel to the cylinder central axis, and the geometric center spacing of the arc surface is equal to the tube center distance of the parallel elbow 3 in the coil.
[0015] In use, the two arc surfaces 2 of the cylinder 1 are welded on the two parallel elbows 3 to be positioned respectively, and in welding, the cylinder axial direction is perpendicular to the parallel elbow, and the arc surface is attached to the outer wall of the parallel elbow. Since the geometric center spacing of the arc surface is equal to the tube center distance of the parallel elbow, after welding is completed, the tube center distance of the parallel elbow is fixed at the welding point, and the positioning tool can be welded at multiple different points of the parallel elbow.
[0016] In order to reduce the weight and facilitate subsequent cutting, the cylinder is preferably a hollow pipe, and the material is generally selected as light aluminum alloy.
[0017] In order to increase the welding contact surface, the arc radius of the arc surface is preferably the same as the radius of the parallel elbow, so that the arc surface can be completely attached to the outer surface of the parallel elbow.
[0018] When one or more positioning tools are used to fix the parallel elbow, the parallel elbow is then fixed by using a communication pipe, a flange or a flowmeter box. Since other components need to be installed on the two elbows during the operation of the flowmeter, the positioning tool connecting the two parallel elbows needs to be disconnected after the parallel elbow is fixed, such as Figure 2 As shown, linear cutting is usually performed along the cutting line 4 in the center of the cylinder. The hollow pipe material is used for the cylinder to facilitate cutting. An annular groove with a wall thickness smaller than the normal wall thickness or a plurality of holes can be pre-set on the cutting line to facilitate cutting. The cutting line can be provided with two cutting lines, so that after cutting, there is a gap between the two parts of the cylinder. The coil or magnetic steel and other components of the flowmeter for measurement can be installed at the gap.
[0019] After cutting, the two parallel elbows are no longer fixed by the positioning tool used in the production process. Although the two half-cylinder cuttings are retained on the elbow, they have no effect on the subsequent actual use of the flowmeter.
[0020] The flowmeter coil auxiliary positioning tool can keep the pipe center distance of the elbow pipe unchanged before the elbow pipe and the flange are fixed, and improves the flowmeter elbow pipe welding precision and the flowmeter measurement performance.
[0021] The foregoing is the various preferred embodiments of the utility model, and the preferred embodiments in the various preferred embodiments can be arbitrarily superimposed and combined if not obviously self-contradictory or with a certain preferred embodiment as a premise, the embodiments and the specific parameters in the embodiments are only for clearly describing the utility model verification process of the utility model person, and are not used to limit the patent protection scope of the utility model, and the patent protection scope of the utility model is still subject to the claims, and equivalent structural changes made by using the content of the specification and drawings of the utility model should also be included in the protection scope of the utility model.
Claims
1. A flowmeter coil auxiliary positioning fixture, characterized in that, Includes a cylinder (1), the side wall of the cylinder has two concave arc surfaces (2), the line connecting the geometric centers of the arc surfaces is parallel to the central axis of the cylinder, and the distance between the geometric centers of the arc surfaces (2) is equal to the distance between the centers of the parallel bends (3) in the coil.
2. The auxiliary positioning fixture for the flow meter coil as described in claim 1, characterized in that, The cylinder (1) is a hollow tube.
3. The auxiliary positioning fixture for the flow meter coil as described in claim 1, characterized in that, The cylinder (1) includes a cutting line (4) with grooves or holes distributed along the cutting line.
4. The auxiliary positioning fixture for the flow meter coil as described in claim 1, characterized in that, The radius of curvature of the arc surface (2) is the same as the radius of the parallel bend (3).
5. The auxiliary positioning fixture for the flow meter coil as described in claim 3, characterized in that, There are two cutting lines.