阅读说明：本技术 一种用于夹持型流量计安装的定位环 (Positioning ring for mounting clamping type flowmeter ) 是由 周军 叶寒生 顾宇 于 2021-10-08 设计创作，主要内容包括：本发明提供一种用于夹持型流量计安装的定位环,定位环的内圈为标准圆形,套设于检测管段上,外圈均布设置有多条渐变外轮廓,渐变外轮廓从始端向末端逐渐内收,内收的末端与相邻渐变外轮廓的始端形成初位槽；将渐变外轮廓始端最大外径记为Ra,末端最小外径记为Rb,法兰螺栓孔的中心圆半径记为R0,螺栓半径记为R1,法兰螺栓孔半径记为R2,要求满足关系：Ra≥R0+R2–R1,Rb≤R0–R1。本发明提供一种用于夹持型流量计的定位环,结构简单紧凑,使用方便,适用于夹持型流量计的同心安装定位,安装定位效果好,成本低,效率高,可反复拆装重复使用。(The invention provides a positioning ring for mounting a clamping type flowmeter, wherein the inner ring of the positioning ring is in a standard circle shape and is sleeved on a detection pipe section, a plurality of gradually-changed outer contours are uniformly distributed on the outer ring, the gradually-changed outer contours are gradually contracted from the initial end to the tail end, and the contracted tail end and the initial end of the adjacent gradually-changed outer contours form an initial positioning groove; the maximum outer diameter of the initial end of the gradual-change outer contour is recorded as Ra, the minimum outer diameter of the tail end of the gradual-change outer contour is recorded as Rb, the radius of a central circle of a flange bolt hole is recorded as R0, the radius of a bolt is recorded as R1, the radius of the flange bolt hole is recorded as R2, and the requirements meet the following relations: ra is more than or equal to R0+ R2-R1, and Rb is more than or equal to R0-R1. The positioning ring for the clamping type flowmeter provided by the invention has the advantages of simple and compact structure, convenience in use, good mounting and positioning effects, low cost, high efficiency and repeated disassembly and assembly for repeated use, and is suitable for concentric mounting and positioning of the clamping type flowmeter.)

1. A positioning ring for mounting a clamping type flowmeter is characterized in that an inner ring of the positioning ring is in a standard circle shape and is sleeved on a detection pipe section, a plurality of gradually-changed outer contours are uniformly distributed on the outer ring, the gradually-changed outer contours gradually retract from the initial end to the tail end, and an initial groove is formed by the retracted tail end and the initial end of the adjacent gradually-changed outer contour;

the maximum outer diameter of the initial end of the gradual-change outer contour is recorded as Ra, the minimum outer diameter of the tail end of the gradual-change outer contour is recorded as Rb, the radius of a central circle of a flange bolt hole is recorded as R0, the radius of a bolt is recorded as R1, the radius of the flange bolt hole is recorded as R2, and the requirements meet the following relations: ra is more than or equal to R0+ R2-R1, and Rb is more than or equal to R0-R1.

2. The retaining ring for a clamp-on flowmeter mounting of claim 1, wherein each tapered outer profile defines a V-notch.

3. The retaining ring for a clamp-on flowmeter mount of claim 2, wherein a V-notch opens at the beginning of each tapered outer profile.

4. The retaining ring for a clamp-on flowmeter mounting according to any one of claims 1-3, wherein the number of tapered outer contours matches the number of flange bolt holes.

5. A method of installing a clamp-on flowmeter based on the retaining ring of claim 1, comprising the steps of:

step 1, respectively sleeving two positioning rings at two ends of a detection pipe section, then placing the detection pipe section between two standard flanges, relatively fixing the two standard flanges by using bolts, and screwing nuts into the two standard flanges but maintaining the two standard flanges in a loose state;

step 2, properly rotating the positioning ring to enable the bolt to correspond to the tail end of the gradually-changed outer contour;

and 3, inserting the linear block into the V-shaped notch, rotating the positioning ring along the inward contraction direction of the gradually-changed outer contour, tightening the bolts by using the gradually-changed outer contour, and then screwing the nuts one by one.

Technical Field

The invention relates to the technical field of flowmeter installation, in particular to a positioning ring for installing a clamping type flowmeter.

Background

Among various types of flowmeters, the clamping type flowmeter has the advantages of small volume, light weight, low price, good stability and the like, and is favored by users. The clamping type flowmeter needs to be concentric with a gas pipeline in the field installation process, and the concentricity has great influence on the measurement precision of the flowmeter. The plate type flat welding steel pipe flange adopting the standard is generally adopted in the prior art for installation, the universality is guaranteed while the installation cost is reduced, the concentric positioning is difficult, the concentricity is difficult to guarantee, and the disassembly and the maintenance are inconvenient.

Disclosure of Invention

Aiming at the defects existing in the installation of the existing clamping type flowmeter, the invention provides a positioning ring for installing the clamping type flowmeter.

The invention protects a positioning ring for mounting a clamping type flowmeter, wherein the inner ring of the positioning ring is in a standard circle shape and is sleeved on a detection pipe section, a plurality of gradually-changed outer contours are uniformly distributed on the outer ring, the gradually-changed outer contours gradually retract from the initial end to the tail end, and the retracted tail end and the initial end of the adjacent gradually-changed outer contours form an initial groove.

The maximum outer diameter of the initial end of the gradual-change outer contour is recorded as Ra, the minimum outer diameter of the tail end of the gradual-change outer contour is recorded as Rb, the radius of a central circle of a flange bolt hole is recorded as R0, the radius of a bolt is recorded as R1, the radius of the flange bolt hole is recorded as R2, and the requirements meet the following relations: ra is more than or equal to R0+ R2-R1, and Rb is more than or equal to R0-R1.

Furthermore, each gradually-changed outer contour is provided with a V-shaped notch, and the V-shaped notch is preferably arranged at the initial end of each gradually-changed outer contour.

Furthermore, the number of the gradually-changed outer contours is matched with the number of the flange bolt holes.

The invention also provides a method for installing the clamping type flowmeter based on the positioning ring, which comprises the following steps:

step 1, respectively sleeving two positioning rings at two ends of a detection pipe section, then placing the detection pipe section between two standard flanges, relatively fixing the two standard flanges by using bolts, and screwing nuts into the two standard flanges but maintaining the two standard flanges in a loose state;

step 2, properly rotating the positioning ring to enable the bolt to correspond to the tail end of the gradually-changed outer contour;

and 3, inserting the linear block into the V-shaped notch, rotating the positioning ring along the inward contraction direction of the gradually-changed outer contour, tightening the bolts by using the gradually-changed outer contour, and then screwing the nuts one by one.

The positioning ring for the clamping type vortex shedding flowmeter provided by the invention is simple and compact in structure, convenient to use, suitable for concentric installation and positioning of the clamping type vortex shedding flowmeter, good in installation and positioning effects, low in cost, high in efficiency, and capable of being repeatedly disassembled, assembled and reused.

Drawings

FIG. 1 is a side view of a retaining ring based clamp-on flowmeter mounting structure;

FIG. 2 is an elevation view of a retaining ring based clamp-on flowmeter mounting structure;

FIG. 3 is a schematic view of the retaining ring;

FIG. 4 is a schematic view of the positioning ring in an initial installed state;

FIG. 5 is a schematic view of the positioning ring holding bolt;

fig. 6 is a schematic diagram of the limiting condition principle.

Description of reference numerals: 1. a pipeline; 2. a bolt; 3. a standard flange; 4. metal-wrapped graphite gaskets; 5. a positioning ring; 6. detecting a pipe section; 7. positioning the inner ring of the ring; 8. a gradient outer contour; 8a, the initial end (highest position) of the outer contour of the gradual change line; 8b, the tail end (lowest position) of the outer contour of the gradual change line; 9. a V-shaped groove notch; 10. a primary tank.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings and the specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

Example 1

A positioning ring 5 for mounting a clamping type flowmeter is disclosed, as shown in figures 1-3, an inner ring 7 of the positioning ring is in a standard circle shape and is sleeved on a detection pipe section 6, a plurality of gradually-changed outer contours 8 are uniformly distributed on the outer ring, the gradually-changed outer contours gradually retract from a starting end 8a to a tail end 8b, and an initial groove 10 is formed between the retracted tail end and the starting end of the adjacent gradually-changed outer contours.

The maximum outer diameter of the initial end of the gradual-change outer contour is recorded as Ra, the minimum outer diameter of the tail end of the gradual-change outer contour is recorded as Rb, the radius of a central circle of a flange bolt hole is recorded as R0, the radius of a bolt is recorded as R1, the radius of the flange bolt hole is recorded as R2, and the requirements meet the following relations: ra is more than or equal to R0+ R2-R1, and Rb is more than or equal to R0-R1.

The limitation of Rb R0-R1 is to facilitate the placement of the retaining ring; the limiting condition of Ra ≧ R0+ R2-R1 is to ensure that the retaining ring plays a tensioning role.

The use method of the positioning ring comprises the following steps:

1. two positioning rings 5 are respectively sleeved at two ends of a detection pipe section 6, then the detection pipe section 6 and a metal winding graphite gasket 4 are placed between two standard flanges 3, the two standard flanges 3 are relatively fixed by using bolts 2, and nuts are screwed in but are maintained in a loose state.

2. The positioning ring 5 is suitably rotated so that the bolt 2 corresponds to the end 8b of the graduated outer profile, as shown in figure 4. Because Rb is less than or equal to R0-R1, the positioning ring can be easily installed.

3. The positioning ring 5 is rotated along the adduction direction of the gradually-changed outer contour (anticlockwise in fig. 4), the bolts are tightened by utilizing the gradually-changed outer contour, and the nuts are tightened one by one as shown in fig. 5. The function of the gradually-changed outer contour capable of playing the role of tightening the bolt is based on the defined condition that Ra is more than or equal to R0+ R2-R1. Of course, Ra should not be set too large, and should be slightly larger than R0+ R2-R1.

The pipeline 1 and a standard flange 3 are welded into a whole, and after bolts are tightened, the positions of the bolts in bolt holes of the flange are limited. Under the accurate condition of assurance standard flange and position ring size, can ensure that centre gripping type vortex flowmeter and gas pipeline 1 are concentric.

In order to facilitate the rotation of the positioning ring, each gradually-changed outer contour is provided with a V-shaped notch 9. The positioning ring can be conveniently rotated by inserting the straight line into the V-shaped notch. The V-shaped notch is preferably arranged at the initial end of each gradually-changed outer contour.

The quantity of gradual change outline and the quantity matching of flange bolt hole set up, and in this embodiment, the equipartition has 8 bolt holes on the standard flange, if the holding ring equipartition sets up 8 gradual change outlines, then has the bigger problem of gradual change outline adduction range, the problem of the rotation of not being convenient for. Therefore, in this embodiment, 4 gradually-changing outer contours are uniformly distributed on the positioning ring.

Finally, it should also be noted that the above list is only one specific embodiment of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.