CN217384355U - Pipeline body of electromagnetic flowmeter and electromagnetic flowmeter - Google Patents
Pipeline body of electromagnetic flowmeter and electromagnetic flowmeter Download PDFInfo
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- CN217384355U CN217384355U CN202122178430.0U CN202122178430U CN217384355U CN 217384355 U CN217384355 U CN 217384355U CN 202122178430 U CN202122178430 U CN 202122178430U CN 217384355 U CN217384355 U CN 217384355U
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- peripheral surface
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Abstract
The utility model relates to a pipeline body of electromagnetic flowmeter, the pipeline body is cylindric and has the rampart, be provided with a plurality of recesses on the inner peripheral surface of rampart. The utility model discloses still relate to an electromagnetic flowmeter including as above pipeline body.
Description
Technical Field
The utility model relates to a pipeline body of electromagnetic flowmeter to and have flowmeter of this pipeline body.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
Electromagnetic flow meters are inductive meters manufactured according to faraday's law of electromagnetic induction for measuring the volumetric flow of a medium flowing through a conduit. Electromagnetic flowmeters have a wide range of applications, and in order to improve corrosion resistance, wear resistance, and the like, to maintain sensitivity and to extend service life, a liner is generally provided inside a pipe body. Since PFA (soluble polytetrafluoroethylene) is a material having heat resistance, cold resistance, chemical stability and excellent mechanical properties, PFA materials are mainly used to form the inner liner in the market at present.
In current electromagnetic flowmeters, when PFA material is used to form the inner lining of the conduit body, it is often necessary to resort to aids such as metal mesh in order to better secure the PFA on the inside of the conduit body. Specifically, a layer of metal mesh is added between the PFA lining and the pipe body, that is, the metal mesh is welded to the inner side of the pipe body in advance, and then PFA is injected, so that the fixing force of the PFA lining and the pipe body is increased by the metal mesh.
However, this method of securing the PFA liner typically requires first securing the metal mesh inside the pipe body by welding, which in turn requires numerous processes associated therewith, thereby increasing the complexity of the assembly. At the same time, the PFA material must completely cover and be higher than the metal mesh by a certain height, for example, by at least 5mm, thereby further resulting in the need for more PFA material, which obviously increases the cost of the electromagnetic flowmeter.
Accordingly, there is a need for a conduit body for an electromagnetic flowmeter that enables a PFA liner to be secured to the inside thereof in a simple and cost-effective manner.
SUMMERY OF THE UTILITY MODEL
It is an object of the present application to provide a conduit body for an electromagnetic flowmeter that enables a PFA liner to be secured to its inside in a simple and cost-effective manner.
It is another object of the present application to provide a method of securing a liner inside a pipe body of an electromagnetic flowmeter in a simple and cost-effective manner.
In order to achieve the above object, according to one aspect of the present invention, there is provided a pipe body of an electromagnetic flow meter, the pipe body being cylindrical and having an annular wall, wherein a plurality of grooves are provided on an inner peripheral surface of the annular wall.
In an aspect, the plurality of grooves are arranged to extend in an axial direction of the inner peripheral surface and are evenly spaced in a circumferential direction of the inner peripheral surface.
In an aspect, the plurality of grooves are arranged to extend in a circumferential direction of the inner peripheral surface and are each evenly spaced in an axial direction of the inner peripheral surface.
In an aspect, at least a part of the plurality of grooves extends in a continuous manner from one end portion of the inner peripheral surface in the axial direction to the other end portion of the inner peripheral surface in the axial direction along the axial direction of the inner peripheral surface.
In an aspect, at least a part of the plurality of grooves extends from one end of the inner peripheral surface in the axial direction to the other end of the inner peripheral surface in the axial direction in a discontinuous manner along the axial direction of the inner peripheral surface.
In an aspect, at least a part of the plurality of grooves extends in a continuous manner along an entire circumference in the circumferential direction of the inner peripheral surface.
In an aspect, at least a portion of the plurality of grooves extend along the entire circumference in the circumferential direction of the inner peripheral surface in a discontinuous manner.
In an aspect, the groove is in the form of a dovetail groove having an opening disposed on the inner peripheral surface and recessed in a radially outward direction from the inner peripheral surface such that a bottom of the dovetail groove is disposed within the annular wall of the pipe body.
In one aspect, a liner is disposed inside the pipe body, and the groove is filled with a material of the liner, thereby fixing the liner to the pipe body.
In an aspect, the depth of the groove in the radial direction is between 0.5 to 1 times the thickness of the liner to be secured in the radial direction.
According to another aspect of the utility model, an electromagnetic flowmeter is provided, electromagnetic flowmeter includes as above the pipeline body.
According to yet another aspect of the present invention, a method for fixing a liner inside a pipe body of an electromagnetic flowmeter is provided, wherein the method comprises the steps of:
providing a pipe body according to the above aspect, and
injection molding an inner liner to the inside of the pipe body.
In an aspect, in the step of providing a pipe body, the groove is formed on an inner side of the pipe body through a casting process or a machining process.
In one aspect, the step of injection molding a liner to the inside of the pipe body comprises:
pouring a lining material in a molten state into the inner side of the tubular body by means of a mold, so that the lining material in the molten state fills each of the plurality of grooves, and further so that the lining material in the molten state is uniformly distributed along the inner circumferential surface of the annular wall, thereby uniformly covering a layer of the lining material with a desired thickness on the inner circumferential surface; and
the lining material is cured and demolded on the inner peripheral surface.
Compared with the method of fixing the PFA liner by means of the auxiliary member, i.e. the metal mesh, in the prior art, the pipe body according to the present invention can fix the PFA liner to the inner side of the pipe body in an "inverted manner" by the structure of the pipe body itself, which avoids the need for the auxiliary member, thus reducing the number of parts, and also avoids the welding process and many other processes associated therewith since the auxiliary member is not needed. This reduces the complexity of the assembly. Meanwhile, in the case where the expanded metal is not provided, it is also not required that the thickness of the PFA liner must be higher than the inner peripheral surface of the expanded metal, thus allowing the thickness of the PFA liner to be thinner, which is advantageous in reducing costs.
Drawings
Fig. 1 is a schematic view of a part of an electromagnetic flowmeter according to an embodiment of the present invention;
fig. 2 shows a perspective view of a pipe body of an electromagnetic flow meter according to an embodiment of the present invention;
FIG. 3 shows a transverse cross-sectional view of a portion of an electromagnetic flowmeter including a pipe body according to the embodiment shown in FIG. 2;
fig. 4 shows a perspective view of a pipe body of an electromagnetic flow meter according to another embodiment of the present invention; and
figure 5 shows a longitudinal cross-sectional view of a portion of an electromagnetic flowmeter including a pipe body according to the embodiment shown in figure 4.
Detailed Description
The foregoing and additional features and characteristics of the present application will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, which are given by way of example only and which are not necessarily drawn to scale. Like reference numerals are used to refer to like elements in the drawings.
Fig. 1 is a schematic view of an electromagnetic flowmeter according to an embodiment of the present invention, which is generally indicated by reference numeral 100 and includes a tubular pipe body 110 and a liner 120 fixed to an inner side of the pipe body 110. The working medium to be measured flows through the pipe body so that the flow rate is measured. In the context of the present application, the liner 120 is generally described as being a liner made of PFA (soluble polytetrafluoroethylene) material, i.e., PFA liner 120. However, it is to be understood that the material of the liner is not limited thereto, and the liner may be made of any other material known in the art suitable for application to the inside of the pipe body of an electromagnetic flowmeter, such as a PEEK material or the like.
Fig. 2 shows a perspective view of a pipe body of an electromagnetic flowmeter according to an embodiment of the present invention. Figure 3 shows a transverse cross-sectional view of a portion of an electromagnetic flowmeter including a pipe body according to the embodiment shown in figure 2.
As shown in fig. 2 and 3, the pipe body 110 has an annular wall 111, and a plurality of grooves 122 are provided on an inner circumferential surface 112 of the annular wall 111. In the embodiment shown in fig. 2 and 3, the plurality of grooves 122 are arranged to extend in the axial direction of the inner peripheral surface and are evenly spaced in the circumferential direction of the inner peripheral surface. In fig. 2 and 3, 8 grooves 122 are shown to be arranged, however, the number of grooves 122 is not limited thereto, and for example, 2, 3, 4, 5, 6, 7 grooves, etc. which are uniformly spaced apart may be arranged in the circumferential direction according to the size of the diameter of the pipe body 110, the number of grooves is preferably between 4 and 8, and more preferably, the number of grooves is an even number.
For convenience of manufacturing, the grooves 122 extend in a continuous manner from one end portion in the axial direction of the inner peripheral surface to the other end portion in the axial direction of the inner peripheral surface, that is, the grooves 122 are arranged along the entire length in the axial direction of the inner peripheral surface 112.
It is contemplated that the grooves 122 may also extend in a discontinuous manner from one end portion in the axial direction of the inner peripheral surface to the other end portion in the axial direction of the inner peripheral surface, that is, the grooves 122 are arranged only along some sections in the axial direction of the inner peripheral surface 112, that is, along a part of the length in the axial direction thereof, but the grooves 122 must be arranged at both end portions in the axial direction of the inner peripheral surface 112 in order to ensure firm fixation of the PFA liner at the piping body end portion to prevent damage to the liner due to installation and removal with other components.
Arranging the grooves 122 in a discontinuous manner on the inner peripheral surface may further save on the amount of lining material and thus on the cost.
It will be appreciated that the above-described two arrangements may also be combined, i.e., both the grooves 122 arranged in a continuous manner and the grooves 122 arranged in a discontinuous manner may be present on the inner peripheral surface.
Fig. 4 shows a perspective view of a pipe body of an electromagnetic flow meter according to another embodiment of the present invention. Figure 5 shows a longitudinal cross-sectional view of a portion of an electromagnetic flowmeter including a pipe body according to the embodiment shown in figure 4.
As shown in fig. 4 and 5, the pipe body 110 has an annular wall 111, and a plurality of grooves 124 are provided on an inner circumferential surface 112 of the annular wall 111. In the embodiment shown in fig. 4 and 5, the plurality of grooves 124 are arranged to extend in the circumferential direction of the inner peripheral surface and are each evenly spaced in the axial direction of the inner peripheral surface. In fig. 4 and 5, 6 grooves 124 are shown arranged, however, the number of grooves 124 is not limited thereto, and for example, 2, 3, 4, 5, 7, 8, etc. grooves may be arranged evenly spaced in the axial direction according to the size of the axial length of the pipe body 110, the spacing between the grooves is preferably between one third and one sixth of the axial length of the pipe body 110, and more preferably, the grooves 124 are provided at both ends in the axial direction near the inner peripheral surface which may ensure secure fixation of the PFA liner at the pipe body end to prevent damage to the fixation of the liner due to installation and removal with other components.
For ease of manufacturing, the grooves 124 extend in a continuous manner along the entire circumference of the inner peripheral surface in the circumferential direction of the inner peripheral surface, that is, the grooves 124 are arranged along the entire circumference of the inner peripheral surface 112.
It is contemplated that grooves 124 may also extend circumferentially of the inner peripheral surface in a discontinuous manner in the circumferential direction of the inner peripheral surface, i.e., grooves 124 may be disposed along only a portion of the circumference of inner peripheral surface 112, while a plurality of grooves 124 may be offset from one another. Arranging the grooves 124 in a discontinuous manner on the inner peripheral surface may further save on the amount of lining material and thus on the cost.
It will be appreciated that the two arrangements described above may also be combined, i.e., there may be both grooves 124 arranged in a continuous manner and grooves 124 arranged in a non-continuous manner on the inner peripheral surface 112.
Further, the above-described grooves 122 extending in the axial direction and the grooves 124 extending in the circumferential direction may also be arranged on the inner peripheral surface 112 at the same time in any combination.
To increase the adhesion or securement force of the PFA liner to the pipe body, as best shown in fig. 3 and 5, the grooves 122, 124 are preferably in the form of dovetail grooves, in a broader sense, in the form of trapezoidal grooves, wherein the openings of the dovetail grooves are disposed on the inner peripheral surface 112 and the dovetail grooves are recessed in a radially outward direction from the inner peripheral surface 112 such that the bottoms of the dovetail grooves are disposed within the annular wall 111 of the pipe body 110, that is, the grooves 122, 124 widen as they are recessed from the inner peripheral surface 112 toward the radially outer side of the pipe body.
Due to the dovetail-shaped groove, the PFA inner liner 120 injection-molded inside the pipe body can be attached or fixed inside the pipe body in an "inverted" manner. A PFA liner secured in this manner can be of a thinner thickness than prior art methods of securing a PFA liner with a metal mesh, since it does not need to cover the metal mesh, and thus does not require the thickness necessary to cover the metal mesh over the dwelling. Specifically, the PFA liner 120 fixed in this manner may have a thickness in the radial direction between 3mm and 5 mm.
The depth of the grooves 122, 124 in the radial direction may be set according to the thickness of the liner 120 to be fixed in the radial direction. For example, the depth of the grooves 122, 124 in the radial direction may be between 0.5 and 1 times the thickness of the liner 120 to be secured in the radial direction. The depth of the grooves 122, 124 in the radial direction may also be set according to the number and arrangement of the grooves 122, 124. The width of the opening of the groove 122 in the circumferential direction may also be set according to the number and arrangement of the grooves 122. Similarly, the width of the opening of the groove 124 in the axial direction may be set according to the number and arrangement of the grooves 124.
With the pipe body according to the embodiments of the present invention as described above, the PFA inner liner 120 can be fixed to the inside of the pipe body in a simple and cost-effective manner.
A method of fixing the liner to the inside of the pipe body of the electromagnetic flowmeter is described below.
First, a pipe body 110 according to any one of the above embodiments is provided. The pipe body 110 may be formed at one time through a casting process, or may be formed in multiple steps through a machining process, such as milling, turning, etc. To facilitate manufacturing, the conduit body 110 may also be made as a multi-piece body, e.g., a two-piece body, wherein each piece has the same semi-cylindrical configuration and thus may be made in the same manufacturing process, thereby improving manufacturing efficiency. The two are then assembled together to form the pipe body 110 with the desired arrangement of grooves 122, 124.
The PFA liner 120 is then injection molded to the inside of the pipe body 110, and cured to be secured by the grooves 122, 124. PFA material in a molten state is poured, for example, through a process die, to the inside of the tubular body 110, causing the PFA material to fill each of the recesses 122, 124, and further causing the PFA material to be evenly distributed along the inner peripheral surface 112 of the annular wall 111, thereby causing the PFA material to be evenly coated on the inner peripheral surface 112 with a layer of PFA material having a desired thickness.
Finally, the PFA material is cured on the inner circumferential surface 111 in a state where the PFA material is uniformly coated on the inner circumferential surface 112, and then, the mold is removed, thereby obtaining the pipe body 110 to which the PFA liner 120 is fixed inside.
Although various embodiments of the present invention have been described in detail herein, it is to be understood that the invention is not limited to the precise embodiments described and illustrated herein, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit and scope of the invention. All such variations and modifications are intended to fall within the scope of the present invention. Moreover, all the components described herein may be replaced by other technically equivalent components.
Claims (11)
1. A pipe body of an electromagnetic flow meter, the pipe body being cylindrical and having an annular wall, characterized in that a plurality of grooves are provided on an inner peripheral surface of the annular wall, openings of the grooves are provided on the inner peripheral surface, and the grooves are recessed outward in a radial direction from the inner peripheral surface such that bottoms of the grooves are provided within the annular wall of the pipe body.
2. The pipe body according to claim 1, wherein the plurality of grooves are arranged to extend in an axial direction of the inner peripheral surface and are evenly spaced apart in a circumferential direction of the inner peripheral surface.
3. The pipe body according to claim 1, wherein the plurality of grooves are arranged to extend in a circumferential direction of the inner peripheral surface and are evenly spaced apart in an axial direction of the inner peripheral surface.
4. The pipe body according to claim 2, wherein at least a part of the plurality of grooves extend in a continuous manner from one end portion of the inner peripheral surface in the axial direction to the other end portion of the inner peripheral surface in the axial direction along the axial direction of the inner peripheral surface.
5. The pipe body according to claim 2, wherein at least a part of the plurality of grooves extends in a discontinuous manner from one end portion of the inner circumferential surface in the axial direction to the other end portion of the inner circumferential surface in the axial direction along the axial direction of the inner circumferential surface.
6. The pipe body according to claim 3, wherein at least a portion of the plurality of grooves extend along an entire circumference in a continuous manner in the circumferential direction of the inner peripheral surface.
7. The pipe body according to claim 3, wherein at least a portion of the plurality of grooves extends along an entire circumference in a discontinuous manner in the circumferential direction of the inner peripheral surface.
8. The pipe body according to any one of claims 1-7, wherein the groove is in the form of a dovetail-shaped groove.
9. The pipe body according to claim 8, wherein a lining is provided on the inside of the pipe body, and the groove is filled with a material of the lining, thereby fixing the lining to the pipe body.
10. The pipe body according to claim 9, wherein the depth of the groove in the radial direction is between 0.5 and 1 times the thickness of the liner to be fixed in the radial direction.
11. An electromagnetic flowmeter comprising a pipe body as claimed in any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122178430.0U CN217384355U (en) | 2021-09-09 | 2021-09-09 | Pipeline body of electromagnetic flowmeter and electromagnetic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122178430.0U CN217384355U (en) | 2021-09-09 | 2021-09-09 | Pipeline body of electromagnetic flowmeter and electromagnetic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217384355U true CN217384355U (en) | 2022-09-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122178430.0U Active CN217384355U (en) | 2021-09-09 | 2021-09-09 | Pipeline body of electromagnetic flowmeter and electromagnetic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217384355U (en) |
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2021
- 2021-09-09 CN CN202122178430.0U patent/CN217384355U/en active Active
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