CN114383672A - Electromagnetic water meter manufacturing method and electromagnetic water meter - Google Patents
Electromagnetic water meter manufacturing method and electromagnetic water meter Download PDFInfo
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- CN114383672A CN114383672A CN202111566955.XA CN202111566955A CN114383672A CN 114383672 A CN114383672 A CN 114383672A CN 202111566955 A CN202111566955 A CN 202111566955A CN 114383672 A CN114383672 A CN 114383672A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/588—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters combined constructions of electrodes, coils or magnetic circuits, accessories therefor
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- Measuring Volume Flow (AREA)
Abstract
The application provides a method for manufacturing an electromagnetic water meter, which comprises the following steps: providing a measurement catheter; manufacturing two connecting pieces; inserting the two opposite ends of the measuring catheter into the central holes of the two connecting pieces respectively, and welding the two opposite ends of the measuring catheter with the two connecting pieces; coating a layer of lining on the inner side of the measuring conduit, and respectively extending two ends of the lining to be attached to at least one part of the outer end faces of the two connecting pieces; assembling a magnetic circuit system on the outer side of the measuring guide pipe and at a position between the two connecting pieces by a non-welding method; a shell is sleeved outside the magnetic circuit system, and two ends of the shell are respectively welded to the two connecting pieces; the first welding position of the outer shell and the connecting piece and the outer wall of the measuring pipe are provided with a first safety distance along the radial direction of the measuring pipe, so that the welding high temperature of the first welding position can not affect the lining. In the manufacturing method of the electromagnetic water meter, the lining cannot be damaged by welding the shell, and the measuring guide pipe adopts a half-coating lining process, so that the material cost is saved.
Description
Technical Field
The application relates to the technical field of intelligent measuring instruments, in particular to a manufacturing method of an electromagnetic water meter and the electromagnetic water meter manufactured by using the manufacturing method.
Background
Electromagnetic flow meters are inductive meters manufactured according to faraday's law of electromagnetic induction for measuring the volumetric flow of a conductive medium within a pipe. The structure of the electromagnetic flowmeter mainly comprises a magnetic circuit system, a measuring conduit, an electrode, a shell, a lining and a converter part.
The electromagnetic flowmeter is manufactured by completely soaking a measuring guide pipe in paint, coating a layer of lining on all surfaces of the measuring guide pipe, assembling a flange in a non-welding mode, arranging a magnetic circuit system and an electrode on the outer side of the guide pipe, and sleeving a shell outside the magnetic circuit system, wherein the shell is generally welded on the measuring guide pipe. The full-face coating of the measuring tube results in a waste of material for the lining and the full-face coating is easily destroyed when the shell is welded at the rear.
Disclosure of Invention
In view of this, the present application provides a method for manufacturing an electromagnetic water meter, so as to solve the technical problem in the prior art that lining materials are wasted due to the fact that a measuring pipe is coated in a full-surface manner.
In order to achieve the above object, in a first aspect, the present embodiment provides a method for manufacturing an electromagnetic water meter, including the following steps:
providing a measurement catheter;
manufacturing two connecting pieces, wherein each connecting piece is provided with a central hole;
welding a measuring guide pipe, inserting two opposite ends of the measuring guide pipe into the central holes of the two connecting pieces respectively, and welding the two opposite ends of the measuring guide pipe with the two connecting pieces;
coating a layer of lining on the inner side of the measuring conduit, and respectively extending two ends of the lining to be attached to at least one part of the outer end faces of the two connecting pieces;
assembling a magnetic circuit system and an electrode, wherein the magnetic circuit system and the electrode are assembled at the position between the two connecting pieces and outside the measuring guide pipe by a non-welding method;
the welding shell is sleeved outside the magnetic circuit system, and two ends of the shell are respectively welded to the two connecting pieces; and providing a first safety distance between the first welding position of the outer shell and the connecting piece and the outer wall of the measuring pipe along the radial direction of the measuring pipe, so that the welding high temperature of the first welding position does not influence the lining.
In the method for manufacturing the electromagnetic water meter, the first welding position of the shell and the connecting piece is spaced from the outer wall of the measuring guide pipe by the first safety distance along the radial direction of the measuring guide pipe, so that the first welding position is far away from the lining as far as possible, and the lining is not damaged by high temperature generated when the shell and the connecting piece are welded, so that the lining can be always tightly attached to the inner wall of the measuring guide pipe and the outer end surface of the connecting piece in a sealing manner; in addition, the measuring pipe is welded at two opposite ends of the measuring pipe to two connecting pieces, and then one side lining is coated on the inner side of the measuring pipe, so that the measuring pipe adopts a half-coating lining process, the coating material is greatly reduced, the lining material cost is saved, and the lining coating time cost is saved.
As an alternative embodiment, the making two connectors includes: processing and forming support surfaces which are arranged on the two connecting pieces and are spaced from the outer wall of the measuring guide pipe along the radial direction of the measuring guide pipe;
the welding enclosure includes: and respectively supporting the inner walls of the two ends of the shell on the supporting surfaces of the two connecting pieces so as to support the two ends of the shell at positions which are far away from the measuring guide pipe along the radial direction of the measuring guide pipe.
As an alternative embodiment, the making two connectors includes:
forming a step on one end surface of the connecting piece;
forming the support surface on the step;
the welding enclosure comprises the steps of:
inserting the two ends of the shell into the steps of the two connecting pieces respectively;
the inner walls of the two ends of the shell are respectively supported on the supporting surfaces of the two connecting pieces;
abutting the end surfaces of the two ends of the shell with the end surfaces of the two connecting pieces respectively;
respectively welding the inner walls of the two ends of the shell to the supporting surfaces of the two connecting pieces; or the outer walls of the two ends of the shell are respectively welded on the end surfaces of the connecting pieces; or the end surfaces of the two ends of the shell are welded on the end surfaces of the two connecting pieces.
As an alternative embodiment, the supporting surface is a continuous or discontinuous cylindrical surface;
or the supporting surface is a continuous or discontinuous conical surface.
As an alternative embodiment, the connecting element is a flange with a neck.
As an alternative embodiment, the welding measuring catheter comprises the following steps:
inserting the end part of the measuring guide pipe into the central hole from one end of the connecting piece and extending into the other end close to the connecting piece, and reserving a second welding position between the end part of the measuring guide pipe and the other end of the connecting piece;
welding the outer wall of the measuring guide pipe and one end face of the connecting piece;
and welding the end surface of the measuring guide pipe with the inner wall of the connecting piece at the second welding position.
In an alternative embodiment, the lining is applied to at least portions of the inner wall of the measurement duct, the second welding location and the outer end surface of the connector.
As an alternative embodiment, the material of the lining is rubber, teflon or fluorine glue.
As an alternative embodiment, after the coating of the liner, the following steps are further included:
and a buffer pad is assembled on the end face of the connecting piece so as to enable the lining to be abutted and jointed on the outer end face of the connecting piece.
As an alternative embodiment, the making the connecting member includes: and a limiting ring for accommodating and limiting the cushion pad is formed on the end surface of the connecting piece, which is away from the other connecting piece, in a protruding manner.
As an alternative embodiment, the coated liner comprises: sequentially attaching the end part of the lining to the part of the end surface of the connecting piece, which is positioned in the limiting ring, and the inner wall of the limiting ring to form a first attaching section and a second attaching section of the lining;
when the cushion pad is assembled, one end face and one circumference of side wall of the cushion pad are respectively tightly abutted against the first attaching section and the second attaching section of the lining, and the other end face of the cushion pad is enabled to protrude out of the limiting ring.
On the other hand, this application still provides an electromagnetism water gauge, forms through above-mentioned electromagnetism water gauge manufacturing method preparation, the electromagnetism water gauge includes:
a measurement catheter;
the two connecting pieces are provided with central holes, and two opposite ends of the measuring guide pipe are respectively inserted into the central holes of the two connecting pieces;
the lining is coated on the inner wall of the measuring catheter, and two ends of the lining are respectively attached to at least one part of end faces of the two connecting pieces;
the magnetic circuit system is arranged on the outer side of the measuring guide pipe and is positioned between the two connecting pieces;
the shell is sleeved outside the magnetic circuit system, and two ends of the shell are respectively welded to the two connecting pieces; a first safety distance is arranged between the first welding position of the shell and the connecting piece and the outer wall of the measuring guide pipe along the radial direction of the measuring guide pipe.
As an alternative embodiment, one end of the connecting piece is formed with a step, the step is provided with a supporting surface, and the inner walls of the two ends of the outer shell are supported on the supporting surfaces of the two connecting pieces;
the outer walls of the two ends of the shell are respectively welded on the end faces of one end of each of the two connecting pieces.
As an alternative embodiment, the supporting surface is a continuous or discontinuous cylindrical surface;
or the supporting surface is a continuous or discontinuous conical surface.
As an alternative embodiment, the connecting element is a flange with a neck.
As an alternative, the end face of the connecting piece is provided with a buffer pad which abuts against the part of the lining which is attached to the connecting piece to protect the lining.
As an alternative embodiment, the end face of the connecting piece is convexly provided with a limiting ring for receiving and limiting the cushion pad.
As an optional implementation manner, the end portions of the liner are respectively attached to the portion, located in the limit ring, of the end face of the connecting piece and the inner wall of the limit ring, so as to form a first attaching section and a second attaching section of the liner;
one end face and a peripheral side wall of the cushion pad are respectively abutted against the first attaching section and the second attaching section of the lining, and the other end face of the cushion pad protrudes out of the limiting ring.
The electromagnetic water meter provided by the embodiment is manufactured by the manufacturing method of the electromagnetic water meter, so that the lining of the manufactured electromagnetic water meter is intact, the lining can be attached to the inner wall of the measuring conduit tightly, and the corrosion resistance of the measuring conduit is improved; in addition, the measuring pipe adopts a semi-coating lining process, so that the coating material is greatly reduced, the lining material cost is saved, and the lining coating time cost is saved.
Drawings
Fig. 1 is a schematic flow chart of a method for manufacturing an electromagnetic water meter according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an electromagnetic water meter according to an embodiment of the present application;
fig. 3 is an enlarged partial schematic view of the left end of the electromagnetic water meter of fig. 2.
Description of reference numerals:
1. a measurement catheter; 2. a connecting member; 21. a first end; 22. a second end; 23. a central bore; 24. a step; 241. a support surface; 25. a limiting ring; 3. a liner; 31. a first attaching section; 32. a second attaching section; 4. a magnetic circuit system; 5. a housing; 6. a cushion pad; 7. a pressure sensor; 8. a converter; 9. an electrode; H. a first safety distance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In addition, in the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered as limiting the present application.
In addition, in the present application, unless otherwise explicitly specified or limited, the terms "connected," "connected," and the like are to be construed broadly, e.g., as meaning both mechanically and electrically; the terms may be directly connected or indirectly connected through an intermediate medium, and may be used for communicating between two elements or for interacting between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present application may be understood by those skilled in the art according to specific situations.
The technical solution of the present application is described in detail below with reference to the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The method for manufacturing the electromagnetic water meter in the present application may refer to a method for manufacturing an electromagnetic flow meter, or may refer to a method for manufacturing an integrated flow-pressure device including an integrated pressure sensor, that is, the method for manufacturing the electromagnetic water meter in the present application does not limit whether the structure other than the measuring pipe 1, the connecting member 2, the liner 3, the magnetic circuit system 4, and the case 5 includes other structures. In addition, the measuring conduit 1 may be a straight-through type (i.e. the caliber is not changed along the axial direction) or a diameter-changing type (i.e. the caliber is gradually changed from two ends to the middle), that is, the shape of the measuring conduit is not limited by the electromagnetic water meter manufacturing method of the present application.
Specifically, as shown in fig. 1 and fig. 2, the method for manufacturing an electromagnetic water meter provided in this embodiment includes the following steps:
s10: providing a measuring catheter 1:
the measuring tube 1 is used for allowing a conductive liquid (such as water) to be measured to pass through, the measuring tube 1 can be made of non-magnetic stainless steel, glass fiber reinforced plastic, high-strength plastic or aluminum, the measuring tube 1 can be cylindrical, and the measuring tube 1 can also be in a shape with the diameter gradually changed from two opposite ends to the middle.
Furthermore, the measuring catheter 1 can be manufactured in the following manner: 1. opening the mould and casting; 2. the customized section pipe is punched by a punch; 3. and (5) customizing the section pipe, punching by using a water expansion machine and the like.
S20: two connectors 2 are made, the centers of the connectors 2 having a central hole 23 running axially through them.
S30: welding the measuring catheter 1, axially inserting the two opposite ends of the measuring catheter 1 into the central holes 23 of the two connecting pieces 2 respectively until the end part of the measuring catheter 1 is close to the axial end face of the connecting piece 2, and welding the two opposite ends of the measuring catheter 1 with the two connecting pieces 2;
wherein the two connectors 2 serve to connect opposite ends of the measuring tube 1 to an external structure, for example to an external pipe flange or to an external device. Inserting the opposite ends of the measuring catheter 1 into the central hole 23 of the connector 2 enhances the strength of the connection between the measuring catheter 1 and the connector 2.
In addition, the measuring catheter 1 and the two connecting pieces 2 are arranged in a split manner and are connected together by welding, so that the measuring catheter 1 is convenient to process and manufacture, the measuring catheter 1 can also be processed into various shapes, for example, the shapes of the two opposite ends gradually change towards the middle, and the two opposite ends of the measuring catheter 1 have a rectification function; in addition, the welding process enables the connection between the measuring guide pipe 1 and the two connecting pieces 2 to be firmer, and the waterproof sealing performance of the joint between the measuring guide pipe 1 and the connecting pieces 2 is better than that of the assembly process that the measuring guide pipe 1 and the connecting pieces 2 are not welded.
S40: coating a lining 3, namely coating a layer of lining 3 on the inner side of the measuring pipe 1, and respectively extending two opposite ends of the lining 3 from the end parts of the measuring pipe 1 and attaching the two opposite ends to at least one part of the outer end surfaces of the two connecting pieces 2;
the lining 3 serves, among other things, to increase the corrosion resistance of the measuring tube 1 and to prevent induced electrical potentials from being conducted through the wall of the measuring tube 1. In the present application, the end of the lining 3 is extended from the end of the measuring tube 1 and is fitted to at least a part of the axial end face of the connector 2, so that the measuring tube 1 can be completely isolated from the flowing liquid, while the fitting stability of the lining 3 is also enhanced. Since the end of the lining 3 extends to the axial end face of the connecting piece 2, the welded joint of the measuring tube 1 and the connecting piece 2 is wrapped inside, and the welded joint is completely isolated from flowing liquid. (ii) a In addition, the present application is that after the opposite ends of the measuring pipe 1 are welded to the two connectors 2, the inside of the measuring pipe 1 is coated with the one-side lining 3, so that the measuring pipe 1 of the present application adopts a half-coating process, which greatly reduces the coating material, saves the material cost of the lining 3, and saves the coating time cost of the lining 3 compared with the prior art in which the lining adopts a full-coating process.
S50: assembling the magnetic circuit system 4 and the electrode 9, and assembling the magnetic circuit system 4 and the electrode 9 at the position which is outside the measuring guide pipe 1 and between the two connecting pieces 2 by a non-welding method;
wherein, the magnetic circuit system 4 and the electrode 9 are assembled by adopting a non-welding method, so that the lining 3 can be prevented from being damaged by high welding temperature, and the lining is fixed on the side wall of the measuring guide pipe 1 by fasteners such as bolts and the like; of course, the magnetic circuit 4 and the electrode 9 may be assembled in front and the liner 3 may be assembled in the rear, and the magnetic circuit 4 and the electrode 9 may be fixed by welding.
S60: welding a shell 5, sleeving the shell 5 outside the magnetic circuit system 4, and respectively welding two opposite ends of the shell 5 on the two connecting pieces 2; the first welding position P1 of the outer shell 5 and the coupling piece 2 has a first safety distance H in the radial direction of the measuring catheter 1 between the outer wall of the measuring catheter 1 and the first welding position P1, so that the high welding temperature of the first welding position P1 does not affect the lining 3.
Wherein, shell 5 adopts stainless steel material to make, and shell 5 is hollow structure, and outside measuring pipe 1 and magnetic circuit 4 were located to shell 5 cover, the relative both ends of shell 5 respectively with two connecting piece 2 welding in order to realize the fixed connection between shell 5 and two connecting piece 2 to the realization is to measuring pipe 1 and magnetic circuit 4's protection.
It should be noted that in practical applications, it often happens that the liner 3 is not well sealed, so that the measuring pipe 1 is corroded, and the electromagnetic water meter is high in damage rate, and the inventors have conducted extensive studies to find that the welding temperature will affect the sealing problem of the liner 3. In particular, the high temperature required for welding between the shell 5 and the connection element 2 is greater than the temperature range that the lining 3 can withstand, so that when the shell 5 and the connection element 2 are welded, the lining 3 is damaged by the high temperature. This application makes first welding position P1 keep away from lining 3 as far as possible through having first safe distance H along measuring pipe 1 footpath between the first welding position P1 with shell 5 and connecting piece 2 and the measuring pipe 1 outer wall, then high temperature when shell 5 and connecting piece 2 weld can not make lining 3 impaired to make lining 3 can seal all the time and hug closely on the outer terminal surface of measuring pipe 1 inner wall and connecting piece 2.
The first safety distance H can be determined according to the welding temperature between the shell 5 and the connecting piece 2, and when the welding temperature between the shell 5 and the connecting piece 2 is higher, the value of the first safety distance H can be set to be larger; when the welding temperature of the housing 5 and the connecting member 2 is low, the first safety distance H may be set to be small; furthermore, the temperature required for the welding between the housing 5 and the connecting piece 2 is mainly determined by the materials of the housing 5 and the connecting piece 2.
In one embodiment, referring to fig. 2 and 3, step S20, the method for manufacturing two connectors 2 includes the following steps: two connecting pieces 2 are provided with bearing surfaces 241 which are arranged at a distance from the outer wall of the measuring tube 1 in the radial direction of the measuring tube 1.
In step S60, welding the housing 5 includes the steps of: inner walls of opposite ends of the housing 5 are supported on the supporting surfaces 241 of the two connection members 2, respectively, to support the opposite ends of the housing 5 at positions radially distant from the measuring guide 1 along the measuring guide 1.
In this embodiment, the supporting surface 241 is formed so as to raise the opposite ends of the outer shell 5 to a position radially far from the measuring tube 1, and specifically, the distance between the supporting surface 241 and the measuring tube 1 in the radial direction can be set according to the requirement of the first safety distance H, so that when the opposite ends of the outer shell 5 are welded to the connecting member 2, the radial distance between the first welding position P1 and the measuring tube 1 can reach the first safety distance H, and the welding high temperature of the outer shell 5 can not damage the lining 3.
In one embodiment, step 20, the making of two connectors 2 comprises the following steps:
s21, forming a step 24 on one end surface of the connector 2;
at S22, a support surface 241 is formed on the step 24.
Step S60, welding the housing 5 includes the steps of:
s61, inserting the two opposite ends of the shell 5 into the steps 24 of the two connecting pieces 2 respectively;
s62, supporting the inner walls of the two opposite ends of the housing 5 on the supporting surfaces 241 of the two connectors 2, respectively;
s63, welding the inner walls of the two opposite ends of the housing 5 to the supporting surfaces 241 of the two connecting members 2, respectively; or the outer walls of the two opposite ends of the shell 5 are respectively welded on the end surfaces of the two connecting pieces 2; or both end faces of the housing 5 are welded to the end faces of the two connection members 2.
Specifically, the connecting piece 2 is provided with a first end 21 and a second end 22 which are oppositely arranged, the step 24 is formed at the first end 21 of the connecting piece 2, the central hole 23 axially penetrates through the step 24 and the connecting piece 2, the step 24 is annular, the supporting surface 241 is the outer wall of the step 24, when the connecting piece is installed, two ends of the shell 5 are respectively inserted into the steps 24 of the two connecting pieces 2, the inner wall of the end part of the shell 5 is abutted to the supporting surface 241, namely, the two ends of the shell 5 are installed to positions far away from the measuring conduit 1 and the lining 3 through the step 24; when welding, the first welding position P1 can be radially away from the measuring pipe 1 and the liner 3, and the liner 3 can be prevented from being damaged by the high welding temperature of the shell 5, regardless of whether the inner wall of the end portion of the shell 5 is directly welded to the supporting surface 241, the outer wall of the end portion of the shell 5 is welded to the first end 21 of the connector 2, or the end surface of the shell 5 is welded to the connector 2. In other embodiments, a step may be formed on the measuring catheter 1, or a step 24 may be formed on the inner wall of the end portion of the housing 5, or a latch may be directly snapped between the measuring catheter 1 and the inner wall of the end portion of the housing 5 by means of interference fit, as long as the first welding position P1 between the housing 5 and the connecting member 2 can be set to have the first safety distance H with the measuring catheter 1 by various means.
In one embodiment, during welding, the end portion of the housing 5 is sleeved outside the step 24, so that the inner wall of the end portion of the housing 5 abuts against the supporting surface 241, the end surface of the housing 5 abuts against the end surface of the first end 21 of the connecting member 2, and finally, the outer wall of the end portion of the housing 5 is welded to the end surface of the first end 21 of the connecting member 2. This application through the tip inner wall of shell 5 and terminal surface respectively with the butt face of step 24 and the terminal surface butt of the first end 21 of connecting piece 2, thereby make the tip of shell 5 be connected reliably and stably with connecting piece 2, at last with the tip outer wall of shell 5 and the terminal surface welding of the first end 21 of connecting piece 2, not only can form sealing connection between shell 5 and the connecting piece 2, also make the welded joint between shell 5 and the connecting piece 2 can not be in the inside of shell 5 simultaneously, thereby can not influence the inseparable laminating between shell 5 and the connecting piece 2 and be connected, the staff operation of also being convenient for in the welding in the shell 5 outside simultaneously, still make first welding position P1 keep away from lining 3 more at last. Of course, in other embodiments, when welding is convenient, and under the condition that the close and firm fit between the housing 5 and the connecting member 2 is ensured, the first welding position P1 between the housing 5 and the connecting member 2 may be arranged on the inner wall or the end face of the housing 5.
In one embodiment, the step 24 is annular, the supporting surface 241 is a continuous cylindrical surface, and the corresponding inner wall of the end portion of the housing 5 is also a cylindrical surface, and when the inner wall of the end portion of the housing 5 abuts against the supporting surface 241, the end portion of the housing 5 is tightly attached to the step 24, so that the housing 5 and the connecting member 2 are firmly connected. In other embodiments of the present application, the supporting surface 241 may be an interrupted cylindrical surface, so that a part of the inner wall of the end of the outer shell 5 abuts against the supporting surface 241, and the outer shell 5 can be installed at a position far away from the liner 3; furthermore, the supporting surface 241 may be a continuous conical surface or an interrupted conical surface, and the conical surface may facilitate the insertion of the outer shell 5 into the step 24 and also mount the outer shell 5 at a position away from the liner 3.
In one embodiment, the connection piece 2 is a flange with a neck, by means of which the connection of the measuring tube 1 to an external pipe flange or equipment is formed. It will be appreciated that in other embodiments of the present application, the connector 2 may be any other hollow structure capable of forming a measuring tube 1 and an external pipe flange or device and forming a step 24 at the first end 21, and is not particularly limited herein.
In one embodiment, S30, welding the gauge catheter 1 includes the steps of:
s31: inserting the end of the measuring catheter 1 from one end (first end 21) of the connector 2 into the central hole 23 and into the vicinity of the other end (second end 22) of the connector 2, and reserving a second welding position P2 between the end of the measuring catheter 1 and the other end (second end 22) of the connector 2;
s32: welding the outer wall of the measuring catheter 1 with the end face of the first end 21 of the connecting piece 2;
s33: the end face of the measuring tube 1 is welded to the inner wall of the connecting piece 2 in a second welding position P2.
Wherein, after inserting measuring pipe 1 into centre bore 23, the outer wall of measuring pipe 1 closely laminates with the inner wall of connecting piece 2, then all weld first end 21 and the second end 22 of measuring pipe 1 and connecting piece 2 respectively, and the welding position is between the outer wall of measuring pipe 1 and the terminal surface of connecting piece 2 and between the terminal surface of measuring pipe 1 and the inner wall of connecting piece 2 respectively, it not only makes the welding firm between measuring pipe 1 and the connecting piece 2, and the welded position can not influence the closely laminating of measuring pipe 1 and connecting piece 2. Furthermore, by reserving the second welding position P2 between the second end 22 of the connector 2 and the end surface of the measuring catheter 1, so that the second welding position P2 is located on the inner wall of the connector 2, it does not protrude beyond the second end 22 of the connector 2 to affect the end surface of the connector 2 to be flush, and also facilitates the positioning of the lining 3. It will be appreciated that in other embodiments of the present application, the end of the measuring tube 1 may be flush with the second end 22 of the connector 2 or may extend beyond the second end 22 of the connector 2, and the second welding position P2 may also be between the outer wall of the measuring tube 1 and the end face of the second end 22 of the connector 2.
In one embodiment, the lining 3 is coated on at least a part of the inner wall of the measuring catheter 1, the second welding position P2 and the outer end face of the connecting piece 2, that is, the insulating material is uniformly coated on at least a part of the second welding position P2 of the inner wall of the measuring catheter 1 and the outer end face of the connecting piece 2 by a coating tool, the operation is simple, and only half coating is needed for the measuring catheter 1, so that the material cost of the lining 3 is saved, and the connection between the lining 3 and the measuring catheter 1 and the connecting piece 2 is tight and sealed.
Preferentially, the lining 3 can be made of tetrafluoro or fluorine glue, the tetrafluoro or fluorine glue has insulativity, the surface is smooth, friction and pressure loss are reduced, meanwhile, the lining is made of natural plants, and the lining is edible, energy-saving and environment-friendly and meets the requirement of direct drinking water. It will be appreciated that in other embodiments of the present application, the lining 3 may also be made of rubber, which is insulating and prevents corrosion of the measuring tube 1.
After the lining 3 is coated, the following steps are also included:
s70, the cushion pad 6 is fitted on the end face of the connector 2 to abut the lining 3 against the outer end face of the connector 2 to protect the lining 3.
Specifically, the buffer cushion 6 is assembled on the end face of the second end 22 of the connecting piece 2, and the buffer cushion 6 abuts against the part, attached to the connecting piece 2, of the lining 3, so that the lining 3 is prevented from being exposed, when the connecting piece 2 is connected with an external pipeline flange or equipment, the buffer cushion 6 will abut against the external pipeline flange or the equipment, and the lining 3 is prevented from being damaged in the production, transportation or installation process.
In one embodiment, step S20 further includes the steps of:
and S23, forming a limiting ring 25 at the end surface of the connecting piece 2 opposite to the other connecting piece 2 in a protruding way, wherein the limiting ring 25 is used for accommodating and limiting the cushion pad 6. Specifically, the end face of the second end 22 of the connecting member 2 is protruded to the limit ring 25, and when the connecting member is installed, the cushion pad 6 is installed in the limit ring 25 and is tightly pressed against the lining 3. The cushion pad 6 may be secured in the stop collar 25 by interference fit, adhesive or lock screws. It will be appreciated that in other embodiments of the present application, the stop collar 25 may be recessed in the end face of the second end 22 of the connector 2, and then the cushioning pad 6 may be inserted into the stop collar 25 such that the cushioning pad 6 at least partially extends beyond the end face of the second end 22 of the connector 2 to abut against an external structure.
Step S40, coating the liner 3 includes the steps of: sequentially attaching the end part of the lining 3 to the part of the end surface of the connecting piece 2 positioned in the limiting ring 25 and the inner wall of the limiting ring 25 to form a first attaching section 31 and a second attaching section 32; the first attaching section 31 is a portion of the lining 3 attached to the connecting member 2, and the second attaching section 32 is a portion of the lining 3 attached to the limiting ring 25.
When the buffer cushion 6 is assembled, one end face of the buffer cushion 6 is abutted to the first attaching section 31 of the lining 3, the side wall of the periphery of the buffer cushion 6 is abutted to the second attaching section 32 of the lining 3, the connection sealing performance of the buffer cushion 6 and the connecting piece 2 is improved, liquid in the measuring pipe 1 is prevented from overflowing to the first attaching section 31 and the second attaching section 32 of the lining 3, and the liquid is prevented from corroding the measuring pipe 1 from the first attaching section 31 and the second attaching section 32 of the lining 3.
Specifically, the cushion pad 6 has a through hole in the center, and after the cushion pad 6 is installed, water in the measuring tube 1 can directly flow through the through hole of the cushion pad 6 and flow to the external structure, and does not overflow to the first attaching section 31 and the second attaching section 32 of the liner 3.
Further, after the cushion pad 6 is assembled, the other end surface of the cushion pad 6 protrudes beyond the stopper ring 25, so that the liner 3 can be protected by abutting the portion of the cushion pad 6 protruding beyond the stopper ring 25 with the outer flange.
In one embodiment, after the magnetic circuit system 4 is installed, the pressure sensor 7 may also be installed on the outer wall of the measuring tube 1, and after the housing 5 is installed, the connection wires of the pressure sensor 7 are installed into the transducer 8, and finally the transducer 8 is installed. Namely, the electromagnetic water meter manufactured by the manufacturing method is a flow and pressure integrated electromagnetic water meter.
In other embodiments of the present application, the pressure sensor 7 may not be installed, i.e. the housing 5 and finally the transducer 8 may be installed directly after the magnetic circuit system 4 is installed. The electromagnetic water meter manufactured by the manufacturing method is an electromagnetic flowmeter.
Correspondingly, the application also provides an electromagnetic water meter which is manufactured by the manufacturing method of the electromagnetic water meter and comprises a measuring conduit 1, two connecting pieces 2, a lining 3, a magnetic circuit system 4, an electrode 9 and a shell 5. The connecting pieces 2 are provided with central holes 23, and the two opposite ends of the measuring catheter 1 are respectively inserted into the central holes 23 of the two connecting pieces 2; the lining 3 is coated on the inner wall of the measuring catheter 1, and two ends of the lining 3 are respectively attached to at least one part of end faces of the two connecting pieces 2; the magnetic circuit system 4 and the electrode 9 are respectively arranged at the outer side of the measuring guide pipe 1 and positioned between the two connecting pieces 2; the shell 5 is sleeved outside the magnetic circuit system 4, and two ends of the shell 5 are respectively welded to the two connecting pieces 2; the first welding point P1 of the housing 5 and the connecting piece 2 has a first safety distance H in the radial direction of the measuring tube 1 from the outer wall of the measuring tube 1.
According to the electromagnetic water meter, a first safety distance H is reserved between a first welding position P1 of the shell 5 and the connecting piece 2 and the outer wall of the measuring guide pipe 1 along the radial direction of the measuring guide pipe 1, so that the first welding position P1 is far away from the lining 3 as far as possible, the lining 3 is not damaged by high temperature generated when the shell 5 and the connecting piece 2 are welded, and the lining 3 can be always tightly attached to the inner wall of the measuring guide pipe 1 and the outer end face of the connecting piece 2 in a sealing manner; in addition, the measuring tube 1 is manufactured by a half-coating process, which greatly reduces the coating material, saves the material cost of the lining 3 and saves the coating time cost of the lining 3 compared with the prior art in which the lining is manufactured by a full-coating process.
In one embodiment, one end of the connecting member 2 is formed with a step 24, the step 24 has a supporting surface 241, and both end inner walls of the housing 5 are supported on the supporting surfaces 241 of the two connecting members 2; the outer walls of the two ends of the shell 5 are respectively welded on the end faces of one end of the two connecting pieces 2. Specifically, the connecting piece 2 is provided with a first end 21 and a second end 22 which are oppositely arranged, the step 24 is formed at the first end 21 of the connecting piece 2, the central hole 23 axially penetrates through the step 24 and the connecting piece 2, the step 24 is annular, the supporting surface 241 is the outer wall of the step 24, when the connecting piece is installed, two ends of the shell 5 are respectively inserted into the steps 24 of the two connecting pieces 2, the inner wall of the end part of the shell 5 is abutted to the supporting surface 241, namely, the two ends of the shell 5 are installed to positions far away from the measuring conduit 1 and the lining 3 through the step 24; when welding, the first welding position P1 can be radially away from the measuring pipe 1 and the liner 3, and the liner 3 can be prevented from being damaged by the high welding temperature of the shell 5, regardless of whether the inner wall of the end portion of the shell 5 is directly welded to the supporting surface 241, the outer wall of the end portion of the shell 5 is welded to the first end 21 of the connector 2, or the end surface of the shell 5 is welded to the connector 2.
In one embodiment, the step 24 is annular, the supporting surface 241 is a continuous cylindrical surface, and the corresponding inner wall of the end portion of the housing 5 is also a cylindrical surface, and when the inner wall of the end portion of the housing 5 abuts against the supporting surface 241, the end portion of the housing 5 is tightly attached to the step 24, so that the housing 5 and the connecting member 2 are firmly connected. In other embodiments of the present application, the supporting surface 241 may be an interrupted cylindrical surface, so that a part of the inner wall of the end of the outer shell 5 abuts against the supporting surface 241, and the outer shell 5 can be installed at a position far away from the liner 3; furthermore, the supporting surface 241 may be a continuous conical surface or an interrupted conical surface, and the conical surface may facilitate the insertion of the outer shell 5 into the step 24 and also mount the outer shell 5 at a position away from the liner 3.
In one embodiment, the connection piece 2 is a flange with a neck, by means of which the connection of the measuring tube 1 to an external pipe flange or equipment is formed. It will be appreciated that in other embodiments of the present application, the connector 2 may be any other hollow structure capable of forming a measuring tube 1 and an external pipe flange or device and forming a step 24 at the first end 21, and is not particularly limited herein.
In one embodiment, the end face of the connecting member 2 is provided with a cushion pad 6, and the cushion pad 6 abuts against the part of the lining 3 attached to the connecting member 2 to protect the lining 3. Specifically, the buffer cushion 6 is assembled on the end face of the second end 22 of the connecting piece 2, and the buffer cushion 6 abuts against the part, attached to the connecting piece 2, of the lining 3, so that the lining 3 is prevented from being exposed, when the connecting piece 2 is connected with an external pipeline flange or equipment, the buffer cushion 6 will abut against the external pipeline flange or the equipment, and the lining 3 is prevented from being damaged in the production, transportation or installation process.
In one embodiment, the end surface of the connecting member 2 is protrusively provided with a stopper ring 25 for receiving and stopping the cushion pad 6. Specifically, the end face of the second end 22 of the connecting member 2 is protruded to the limiting ring 25, and when the connecting member is installed, the cushion pad 6 is installed in the limiting ring 25 and is tightly pressed against the lining 3. The cushion pad 6 may be secured in the stop collar 25 by interference fit, adhesive or lock screws. It will be appreciated that in other embodiments of the present application, the stop collar 25 may be recessed in the end face of the second end 22 of the connector 2, and then the cushioning pad 6 may be inserted into the stop collar 25 such that the cushioning pad 6 at least partially extends beyond the end face of the second end 22 of the connector 2 to abut against an external structure.
In one embodiment, the end portions of the lining 3 are respectively attached to the portion of the end surface of the connecting member 2 located in the limiting ring 25 and the inner wall of the limiting ring 25 to form a first attaching section 31 and a second attaching section 32 of the lining 3; the first attaching section 31 is a portion of the lining 3 attached to the connecting member 2, and the second attaching section 32 is a portion of the lining 3 attached to the limiting ring 25.
An end face and a week lateral wall of blotter 6 support tightly with first laminating section 31 and the second laminating section 32 of lining 3 respectively to improved the sealing performance of being connected of blotter 6 and connecting piece 2, and then prevented that the water in the measuring pipe 1 from overflowing to first laminating section 31 and the second laminating section 32 of lining 3, avoided first laminating section 31 and the second laminating section 32 of lining 3 to be corroded.
The other end face of the cushion pad 6 protrudes from the retainer ring 25 so that the liner 3 can be protected by abutting the portion of the cushion pad 6 protruding outside the retainer ring 25 with the outer flange.
In one embodiment, the electromagnetic water meter may further comprise a pressure sensor 7, the pressure sensor 7 is mounted on an outer wall of the measuring pipe 1 and spaced apart from the magnetic circuit system 4, and the pressure of the liquid flowing through the measuring pipe 1 is measured by the pressure sensor 7. In other embodiments of the present application, the electromagnetic water meter may not include the pressure sensor 7.
The scheme is that the product price of the applicant based on foreign competitors is high, and the applicant continuously clamps necks of domestic enterprises, so that the applicant spends more than one year to break through the bottleneck, and finally thinks the scheme of the application.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (18)
1. A method for manufacturing an electromagnetic water meter is characterized by comprising the following steps:
providing a measurement catheter;
manufacturing two connecting pieces, wherein each connecting piece is provided with a central hole;
welding a measuring guide pipe, inserting two opposite ends of the measuring guide pipe into the central holes of the two connecting pieces respectively, and welding the two opposite ends of the measuring guide pipe with the two connecting pieces;
coating a layer of lining on the inner side of the measuring conduit, and respectively extending two ends of the lining to be attached to at least one part of the outer end faces of the two connecting pieces;
assembling a magnetic circuit system and an electrode, wherein the magnetic circuit system and the electrode are assembled at the position between the two connecting pieces and outside the measuring guide pipe by a non-welding method;
the welding shell is sleeved outside the magnetic circuit system, and two ends of the shell are respectively welded to the two connecting pieces; and providing a first safety distance between the first welding position of the outer shell and the connecting piece and the outer wall of the measuring pipe along the radial direction of the measuring pipe, so that the welding high temperature of the first welding position does not influence the lining.
2. A method of making an electromagnetic water meter as set forth in claim 1, wherein said making two connectors includes: processing and forming support surfaces which are arranged on the two connecting pieces and are spaced from the outer wall of the measuring guide pipe along the radial direction of the measuring guide pipe;
the welding enclosure includes: and respectively supporting the inner walls of the two ends of the shell on the supporting surfaces of the two connecting pieces so as to support the two ends of the shell at positions which are far away from the measuring guide pipe along the radial direction of the measuring guide pipe.
3. A method of making an electromagnetic water meter as set forth in claim 2, wherein said making two connectors includes:
forming a step on one end surface of the connecting piece;
forming the support surface on the step;
the welding enclosure comprises the steps of:
inserting the two ends of the shell into the steps of the two connecting pieces respectively;
the inner walls of the two ends of the shell are respectively supported on the supporting surfaces of the two connecting pieces;
abutting the end surfaces of the two ends of the shell with the end surfaces of the two connecting pieces respectively;
respectively welding the inner walls of the two ends of the shell to the supporting surfaces of the two connecting pieces; or the outer walls at two ends of the shell are respectively welded on the end surfaces of the two connecting pieces; or the end surfaces of the two ends of the shell are welded on the end surfaces of the two connecting pieces.
4. A method of fabricating an electromagnetic water meter as set forth in claim 2, wherein said support surface is a continuous or discontinuous cylindrical surface;
or the supporting surface is a continuous or discontinuous conical surface.
5. A method of making an electromagnetic water meter as set forth in claim 3, wherein said connector is a flange having a neck.
6. A method of fabricating an electromagnetic water meter as claimed in any one of claims 1 to 5, wherein said welding of said gauging conduits includes the steps of:
inserting the end part of the measuring guide pipe into the central hole from one end of the connecting piece and extending into the other end close to the connecting piece, and reserving a second welding position between the end part of the measuring guide pipe and the other end of the connecting piece;
welding the outer wall of the measuring guide pipe and one end face of the connecting piece;
and welding the end surface of the measuring guide pipe with the inner wall of the connecting piece at the second welding position.
7. A method of making an electromagnetic water meter as set forth in claim 6, wherein said liner is applied to at least portions of said inner wall of said measuring conduit, said second weld location and said outer end surface of said connector.
8. A method of fabricating an electromagnetic water meter as claimed in any one of claims 1 to 5, wherein said liner is made of rubber, teflon or fluoro-rubber.
9. A method of fabricating an electromagnetic water meter as claimed in any one of claims 1 to 5, further comprising the steps of, after said coating of said liner:
and a buffer pad is assembled on the end face of the connecting piece so as to enable the lining to be abutted and jointed on the outer end face of the connecting piece.
10. A method of making an electromagnetic water meter as set forth in claim 9, wherein said making a connection includes: and a limiting ring for accommodating and limiting the cushion pad is formed on the end surface of the connecting piece, which is away from the other connecting piece, in a protruding manner.
11. A method of making an electromagnetic water meter as set forth in claim 10, wherein said coating a liner comprises: sequentially attaching the end part of the lining to the part of the end surface of the connecting piece, which is positioned in the limiting ring, and the inner wall of the limiting ring to form a first attaching section and a second attaching section of the lining;
when the cushion pad is assembled, one end face and one circumference of side wall of the cushion pad are respectively tightly abutted against the first attaching section and the second attaching section of the lining, and the other end face of the cushion pad is enabled to protrude out of the limiting ring.
12. An electromagnetic water meter, made using the method of making an electromagnetic water meter of any one of claims 1 to 11, comprising:
a measurement catheter;
the two connecting pieces are provided with central holes, and two opposite ends of the measuring guide pipe are respectively inserted into the central holes of the two connecting pieces;
the lining is coated on the inner wall of the measuring catheter, and two ends of the lining are respectively attached to at least one part of end faces of the two connecting pieces;
the magnetic circuit system is arranged on the outer side of the measuring guide pipe and is positioned between the two connecting pieces;
the shell is sleeved outside the magnetic circuit system, and two ends of the shell are respectively welded to the two connecting pieces; a first safety distance is arranged between the first welding position of the shell and the connecting piece and the outer wall of the measuring guide pipe along the radial direction of the measuring guide pipe.
13. An electromagnetic water meter as set forth in claim 12, wherein said connecting member is formed at one end thereof with a step having a support surface, and inner walls of both ends of said housing are supported on said support surfaces of both of said connecting members;
the outer walls of the two ends of the shell are respectively welded on the end faces of one end of each of the two connecting pieces.
14. An electromagnetic water meter as set forth in claim 13, wherein said support surface is a continuous or intermittent cylindrical surface;
or the supporting surface is a continuous or discontinuous conical surface.
15. An electromagnetic water meter as set forth in claim 13, wherein said connection member is a flange having a neck.
16. An electromagnetic water meter as claimed in any one of claims 12 to 15, wherein a cushioning pad is provided on an end surface of said connector, said cushioning pad abutting against a portion of said liner abutting said connector to protect the liner.
17. An electromagnetic water meter as set forth in claim 16, wherein said connecting member has a retaining ring projecting from an end surface thereof for receiving and retaining said cushion.
18. The electromagnetic water meter recited in claim 17, wherein said liner has ends respectively attached to said connector end surface at a portion of said retaining ring and an inner wall of said retaining ring to form first and second attachment sections of said liner;
one end face and a peripheral side wall of the cushion pad are respectively abutted against the first attaching section and the second attaching section of the lining, and the other end face of the cushion pad protrudes out of the limiting ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111566955.XA CN114383672B (en) | 2021-12-20 | 2021-12-20 | Electromagnetic water meter manufacturing method and electromagnetic water meter |
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| CN202111566955.XA CN114383672B (en) | 2021-12-20 | 2021-12-20 | Electromagnetic water meter manufacturing method and electromagnetic water meter |
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| CN211717524U (en) * | 2020-03-26 | 2020-10-20 | 天津市迅尔仪表科技有限公司 | Electromagnetic flow sensor with compact structure |
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| US4277091A (en) * | 1979-04-19 | 1981-07-07 | Hunter John J | Coupling for lined pipe |
| WO2010094293A1 (en) * | 2009-02-17 | 2010-08-26 | Siemens Aktiengesellschaft | Electromagnetic flowmeter and method of manufacture thereof |
| JP2013036934A (en) * | 2011-08-10 | 2013-02-21 | Toshiba Corp | Electromagnetic flow meter |
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| CN114383672B (en) | 2022-10-11 |
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