Lining and electrode mounting structure of high-voltage electromagnetic flowmeter and lining forming process

Abstract

An electromagnetic flowmeter comprises a shell, two symmetrical electrode holders are arranged on the outer wall of the shell, detection electrodes are fixedly arranged in the electrode holders, and a left half mold and a right half mold are inserted into the two ends of the shell correspondingly; a mold closing seam of the left half mold and the right half mold is located on a plane where the two detection electrodes are located, and grooves are formed in the positions, corresponding to the detection electrodes, of the left half mold and the right half mold; before injection molding is started, the left half mold and the right half mold are closed, the end of the detection electrode is inserted into a hemisphere formed by the two grooves, a material used for forming a lining is injected into an injection molding cavity between the shell and the left half mold and the right half mold, demolding is conducted after cooling, and redundant materials formed at the end of the detection electrode are removed. The electromagnetic flowmeter has the effect of avoiding lining damage caused by punching in the production process of the electromagnetic flowmeter.

Description

Technical Field

[0001] The present application relates to the technical field of an electromagnetic flowmeter, and in particular to a high-voltage electromagnetic flowmeter lining and electrode mounting structure and a lining molding process. Background Art

[0002] Electromagnetic flowmeter is an instrument for measuring the flow of conductive liquid based on Faraday's electromagnetic induction principle. According to Faraday's electromagnetic induction principle, a pair of detection electrodes are installed on the pipe wall perpendicular to the axis of the measuring pipe and the magnetic lines of force. When the conductive liquid moves along the axis of the measuring pipe, the conductive liquid cuts the magnetic lines of force to generate an induced potential, which is detected by the two detection electrodes and the value is proportional to the flow rate. Electromagnetic flowmeters can be set in a variety of diameters with high accuracy and can be used in the field of high-pressure water injection in oil fields and oil wells.

[0003] Electromagnetic flowmeters usually include a shell and an injection-molded lining. A stainless steel mesh is added to the inside of the lining to increase strength. The stainless steel mesh is located inside the lining. When installing detection electrodes on the shell and lining, it is necessary to first punch holes in the shell and lining to form electrode holes. The electrode holes penetrate the shell and lining, and then insert the detection electrodes into the electrode holes and fix the detection electrodes.

[0004] The related technology discloses a quick installation tool for electromagnetic flowmeter electrodes, including a flow guide tube of the electromagnetic flowmeter, an electrode hole on the flow guide tube and a tool for installing the electrode in the flow guide tube, and also includes an expansion mechanism and an adsorption mechanism. The adsorption end of the adsorption mechanism is fixed to the outer wall of the expansion mechanism, the adsorption end of the adsorption mechanism adsorbs the electrode, and the electrode is squeezed out of the electrode hole in the flow guide tube by the expansion mechanism.

[0005] During the processing, the hole wall of the lining will be damaged due to the rotating shear force of the drill bit. After the detection electrode is installed, it is easy to cause the lining to tear during later use, resulting in inaccurate water inlet measurement of the electromagnetic flowmeter. Summary of the invention

[0006] In order to avoid lining damage caused by punching during the production process of an electromagnetic flowmeter, the present application provides a high-voltage electromagnetic flowmeter lining and electrode mounting structure and a lining molding process.

[0007] The present application provides a high-pressure electromagnetic flowmeter lining forming process, which adopts the following technical solution: A high-voltage electromagnetic flowmeter lining molding process, the electromagnetic flowmeter comprises a shell, two symmetrical electrode seats are arranged on the outer wall of the shell, detection electrodes are fixedly arranged in the electrode seats, including inserting a left half mold and a right half mold at both ends of the shell respectively, the mold seam of the left half mold and the right half mold is located on the plane where the two detection electrodes are located, and grooves are opened at positions corresponding to the detection electrodes on the left half mold and the right half mold; before injection molding begins, the left half mold and the right half mold are first molded together, and the end of the detection electrode is inserted into the hemispherical shape formed by the two grooves, and the material for forming the lining is injected into the injection molding cavity between the shell and the left half mold and the right half mold, and the mold is demolded after cooling, and the excess material formed at the end of the detection electrode is removed.

[0008] By adopting the above technical solution, when in use, the detection electrode is first fixed on the electrode holder of the electrode holder, and the end of the detection electrode is inserted inward from the outside of the shell, and the hemispherical shape formed by the two grooves of the left half mold and the right half mold can be used to correspond to the end of the detection electrode to limit the position of the detection electrode, and then the material for forming the lining is added to the injection molding cavity formed between the left half mold, the right half mold and the shell, so that the lining and the detection electrode are bonded by injection molding, and the excess material formed at the end of the detection electrode is removed after demolding, so that the detection electrode does not need to be punched, thereby avoiding damage to the lining caused by punching during the production process of the electromagnetic flowmeter.

[0009] Preferably, a through hole is provided on the shell, the diameter of the through hole is larger than the diameter of the detection electrode, an electrode mounting hole is provided in the electrode seat, the detection electrode includes a main body and a positioning part, the positioning part is located at one end of the main body and in the electrode mounting hole, and the diameter of the electrode mounting hole is larger than the diameter of the positioning part.

[0010] By adopting the above technical solution, a through hole is opened on the shell, and the diameter of the through hole is larger than the diameter of the detection electrode. During the process of injection molding of the lining, the lining material is also injected into the gap between the through hole and the detection electrode, and at the same time extends into the electrode mounting hole, so that the detection electrode is wrapped by the lining, thereby increasing the bonding contact surface.

[0011] Preferably, a plurality of annular grooves are formed on the outer peripheral wall of the positioning portion.

[0012] By adopting the above technical solution, an annular groove is provided on the periphery of the positioning part, so that the injection molding material on the periphery of the positioning part enters into the annular groove, thereby improving the connection strength between the positioning part and the injection molding material and achieving better integrity.

[0013] Preferably, a threaded hole is provided on the electrode seat, the diameter of the threaded hole is larger than the diameter of the electrode mounting hole, and the electrode mounting hole is located at the bottom of the threaded hole, the center line of the electrode mounting hole coincides with the center line of the threaded hole, and a positioning step surface is formed at the bottom of the electrode mounting hole, and one side of the positioning portion is flush with the positioning step surface.

[0014] By adopting the above technical solution, the positioning step surface at the bottom of the electrode mounting hole is flush with one side of the positioning part, so that after the positioning part is flush with the positioning step surface, the position of the detection electrode can be fixed, ensuring the length of the detection electrode extending out of the lining and reducing manufacturing deviations.

[0015] Preferably, a plug is threadedly connected in the threaded hole, a center hole is opened in the center of the plug, a connecting bolt is arranged in the center hole, the end face of the plug abuts against the positioning step surface, the connecting bolt is threadedly connected to the detection electrode, and the positioning part abuts against the end face of the plug through the connecting bolt.

[0016] By adopting the above technical solution, the plug is threadedly connected in the threaded hole, the end of the plug first abuts against the positioning step surface, and then the detection electrode is pulled by the connecting bolt to make the positioning part abut against the end face of the plug, thereby facilitating the alignment of the positioning step surface with the end face of the positioning part.

[0017] Preferably, a conical portion is provided at the connection between the nut of the connecting bolt and the screw rod, the center line of the conical portion coincides with the center line of the connecting bolt, the smaller end of the conical portion is away from the nut of the connecting bolt, and the conical portion is used to be inserted into the center hole and the conical surface of the conical portion abuts the end of the center hole.

[0018] By adopting the above technical solution, the center line of the conical portion coincides with the center line of the connecting bolt. After the connecting bolt is threadedly connected to the detection electrode, the conical surface of the conical portion on the connecting bolt abuts against the end of the center hole, so that the center of the connecting bolt can coincide with the center of the center hole, making it convenient to coincide the center of the detection electrode with the center of the through hole.

[0019] Preferably, the left and right half molds are both provided with flange parts, the center lines of the flange parts coincide with the center lines of the left and right half molds, the flange parts are provided with injection holes connected to the injection cavity, and the diameter of the flange parts is equal to the outer diameter of the shell.

[0020] By adopting the above technical solution, flange parts are provided on the left half mold and the right half mold. When the flange parts are abutted against the two ends of the outer shell, the outer peripheral walls of the flange parts are flush with the outer peripheral walls of the outer shell, so that the centers of the left half mold and the right half mold coincide with the center of the outer shell, so that the center position of the lining that can be formed coincides with the center position of the outer shell.

[0021] The present application also provides a high-pressure electromagnetic flowmeter lining, which adopts the following technical solution: A high-voltage electromagnetic flowmeter lining, a shell is arranged on the outside of the lining, and two electrode seats are provided on the side walls of the shell, an electrode mounting hole is arranged in the electrode seat, a positioning step surface is arranged at the end of the electrode mounting hole, a detection electrode is arranged in the electrode mounting hole, a connecting ring is formed in the through hole of the shell for mounting the detection electrode, a blocking block is formed in the electrode mounting hole, the lining, the connecting ring and the blocking block are integrally arranged and formed, and the blocking block is flush with the positioning step surface.

[0022] By adopting the above technical solution, a lining is formed inside the shell, a connecting ring is formed between the through hole of the shell and the detection electrode, a block is formed in the electrode mounting hole, and the lining, the connecting ring and the block are integrally formed and wrap the detection electrode, so that the detection electrode is installed more firmly and avoids damage caused by the need to open a hole in the lining when installing the detection electrode.

[0023] The present application also provides an electrode installation structure for a high-voltage electromagnetic flowmeter, which adopts the following technical solution: An electrode mounting structure for a high-voltage electromagnetic flowmeter, wherein a sealing gasket is arranged in an electrode seat, the sealing gasket abuts against a positioning step surface, an insulating sheet is arranged on a side of the sealing gasket away from the positioning step surface, a locking nut is threadedly connected to the electrode seat, the locking nut is used to abut against the insulating sheet and fix the detection electrode through the insulating sheet and the sealing gasket.

[0024] By adopting the above technical solution, a sealing gasket is arranged in the electrode seat, and the sealing gasket seals the detection electrode and the block. At the same time, the sealing gasket is squeezed by the insulating sheet to fix the detection electrode, thereby improving the insulation between the detection electrode and the shell.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The material used to form the lining is injected into the cavity formed between the left half mold, the right half mold and the shell, so that the lining and the detection electrode are bonded by injection molding, and the excess material formed at the end of the detection electrode is removed after demoulding, so that the detection electrode does not need to be punched, avoiding the damage of the lining caused by punching during the production process of the electromagnetic flowmeter; 2. The positioning step surface at the bottom of the electrode mounting hole is flush with one side of the positioning part, so that the position of the detection electrode can be fixed after the positioning part is flush with the positioning step surface, ensuring the length of the detection electrode extending out of the lining and reducing manufacturing deviation; 3. By aligning the center line of the tapered portion with the center line of the connecting bolt, after the connecting bolt is threadedly connected to the detection electrode, the tapered surface of the tapered portion on the connecting bolt abuts against the end of the center hole, so that the center of the connecting bolt can be aligned with the center of the center hole, making it convenient to overlap the center of the detection electrode with the center of the through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is a schematic diagram of the connection structure between the housing and the mold in the embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the lining formed by injection molding in an embodiment of the present application; Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A; Figure 4 Schematic diagram of the explosion of the left and right half molds in the embodiment of the present application; Figure 5 It is a schematic diagram of the electrode installation structure of a high-voltage electromagnetic flowmeter in an embodiment of the present application.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. left half mold; 11. groove; 12. flange; 13. injection hole; 14. injection cavity; 2. right half mold; 3. shell; 31. electrode holder; 311. threaded hole; 312. positioning step surface; 313. electrode mounting hole; 32. through hole; 4. lining; 41. connecting ring; 42. block; 5. detection electrode; 51. main body; 52. positioning part; 521. ring groove; 53. connecting part; 54. electrode screw hole; 6. plug; 61. center hole; 7. connecting bolt; 71. tapered part; 8. excess material; 91. sealing gasket; 92. insulating sheet; 93. locking nut; 94. screw. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-5 This application is described in further detail.

[0029] The present application embodiment discloses a high-pressure electromagnetic flowmeter lining forming process, referring to Figure 1 and Figure 2 , including a mold for injection molding a lining 4, the mold including a left half mold 1 and a right half mold 2, the left half mold 1 and the right half mold 2 cooperate to perform injection molding on the lining 4, the electromagnetic flowmeter includes a shell 3, a lining 4 and a detection electrode 5, the shell 3 can be made of stainless steel material, the shell 3 is a circular tube as a whole, and can also be set to a square or elliptical shape, an electrode holder 31 is set on the outer wall of the shell 3, the detection electrode 5 is located inside the electrode holder 31, and one end of the detection electrode 5 passes through the position of the electrode holder 31 to the inside of the lining 4.

[0030] refer to Figure 2 and Figure 3Two electrode holders 31 are arranged on the side wall of the shell 3 perpendicular to the axis direction of the shell 3. The axis of the electrode holder 31 is perpendicular to and intersects with the axis of the shell 3. A threaded hole 311 is provided on the end surface of the electrode holder 31 away from the shell 3. A positioning step surface 312 is formed at the bottom of the threaded hole 311. The positioning step surface 312 is used to limit the depth of the detection electrode 5 inserted into the liner 4, so that the length of the end of the detection electrode 5 leaking from the inner wall of the liner 4 is the same. At the same time, an electrode mounting hole 313 is formed in the electrode holder 31. The axis of the electrode mounting hole 313 coincides with the axis of the threaded hole 311, and the diameter of the electrode mounting hole 313 is smaller than the diameter of the threaded hole 311. A through hole 32 is provided on the inner wall of the shell 3. The diameter of the through hole 32 is larger than the diameter of the detection electrode 5, so that a gap is formed between the detection electrode 5 and the inner wall of the through hole 32. The width of the gap is selected to be 4-8 mm, and the width of the gap is the difference between the radius of the detection electrode 5 and the radius of the through hole 32.

[0031] The detection electrode 5 includes a main body 51, a positioning portion 52 and a connecting portion 53. The main body 51 is cylindrical, and the detection end of the main body 51 is a hemispherical surface. One end of the hemispherical surface of the main body 51 is used to penetrate into the lining 4. The positioning portion 52 is fixed to the end of the main body 51 away from the hemispherical surface, and the positioning portion 52 is also arranged in a cylindrical shape. The positioning portion 52 is coaxially arranged with the main body 51, and the connecting portion 53 is coaxially arranged with the positioning portion 52 and is located on the end of the positioning portion 52 away from the main body 51. The main body 51, the positioning portion 52 and the connecting portion 53 are formed as a whole, and an electrode screw hole 54 is opened in the center of the connecting portion 53. The electrode screw hole 54 can penetrate the connecting portion 53 and the positioning portion 52 and enter into the main body 51 as needed.

[0032] A plug 6 is threadedly connected to the threaded hole 311 of the electrode holder 31, and a center hole 61 is opened in the center of the plug 6. One end of the plug 6 located in the threaded hole 311 abuts against the positioning step surface 312, and the connecting portion 53 of the detection electrode 5 is inserted into the center hole 61, so that the positioning portion 52 of the detection electrode 5 abuts against the end of the plug 6 facing the end of the connecting portion 53. The end of the plug 6 is arranged perpendicular to the axis of the center hole 61, and a connecting bolt 7 is arranged in the center hole 61. The connecting bolt 7 is threadedly connected to the electrode screw hole 54, and the detection electrode 5 is fixed to the plug 6 by the connecting bolt 7, so that the detection electrode 5 is in a suspended state in the through hole 32.

[0033] A tapered portion 71 is provided at the connection between the nut and the screw of the connecting bolt 7. The smaller end of the tapered portion 71 is away from the nut of the connecting bolt 7. The center line of the tapered portion 71 coincides with the center line of the connecting bolt 7. The screw diameter of the connecting bolt 7 is smaller than the diameter of the center hole 61. After the connecting bolt 7 is threadedly connected to the detection electrode 5, the tapered portion 71 is inserted into the center hole 61, and the center line of the connecting bolt 7 coincides with the center line of the center hole 61 through the tapered surface of the tapered portion 71, so that the center of the detection electrode 5 can coincide with the center of the through hole 32, so as to ensure that the installation position of the detection electrode 5 on the housing 3 is relatively accurate.

[0034] A plurality of annular grooves 521 are formed on the outer peripheral wall of the connection portion 53 , or the surface is dotted or polished to form a rough surface, so that the position of the connection portion 53 can have better adhesion during the injection molding process.

[0035] refer to Figure 4 A groove 11 is provided at the position where the left half mold 1 and the right half mold 2 are opposite to the end of the detection electrode 5. The two grooves 11 are combined into a hemispherical shape. The mold seam of the left half mold 1 and the right half mold 2 is located on the plane where the two detection electrodes 5 are located. A flange portion 12 is provided on the left half mold 1 and the right half mold 2. The flange portion 12 is used to abut against the end of the shell 3. The outer diameters of the left half mold 1 and the right half mold 2 are smaller than the inner diameter of the shell 3. After the left half mold 1 and the right half mold 2 are molded together, an injection cavity 14 is formed between the outer walls of the left half mold 1 and the right half mold 2 and the inner wall of the shell 3. An injection hole 13 is provided on the flange portion 12. The injection hole 13 is used to connect to the injection cavity 14. The outer diameter of the flange portion 12 is equal to the outer diameter of the shell 3.

[0036] Before starting the injection molding, the left half mold 1 and the right half mold 2 are respectively inserted into the housing 3 from both ends of the housing 3, so that the position of the groove 11 corresponds to the end of the detection electrode 5, so that the end of the detection electrode 5 enters the groove 11, and then the left half mold 1 and the right half mold 2 are clamped, and at the same time, the outer wall of the housing 3 coincides with the outer peripheral wall of the flange part 12, and then the material of the molding liner 4 is injected into the injection cavity 14 from the injection hole 13. The material of the molding liner 4 can be selected from polytetrafluoroethylene propylene or Teflon. During the injection molding process, A liner 4 is formed in the injection cavity 14, a connecting ring 41 is formed between the inner wall of the through hole 32 and the outer wall of the detection electrode 5, a block 42 is filled in the electrode holder 31 between the positioning step surface 312 and the bottom surface of the electrode mounting hole 313 and wraps the mounting portion, the block 42, the mounting portion and the positioning step surface 312 are flush, and excess material 8 is formed in the groove 11. After cooling, the left half mold 1 and the rear half mold are respectively pulled out from the two ends of the shell 3, and the excess material 8 is cleaned at the same time to expose the end of the detection electrode 5.

[0037] The present embodiment also discloses a high-voltage electromagnetic flowmeter lining, which is formed by adopting the above-disclosed high-voltage electromagnetic flowmeter lining molding process, wherein a shell 3 is provided on the outer side of the lining 4, and two electrode seats 31 are provided on the side walls of the shell 3, an electrode mounting hole 313 is provided in the electrode seat 31, a positioning step surface 312 is provided at the end of the electrode mounting hole 313, a detection electrode 5 is provided in the electrode mounting hole 313, the lining 4 is injection-molded and glued to the outer side of the detection electrode 5, and a connecting ring 41 is formed in the through hole 32 on the shell 3, a blocking block 42 is formed in the electrode mounting hole 313, the lining 4, the connecting ring 41 and the blocking block 42 are integrally formed, and the blocking block 42 is flush with the positioning step surface 312.

[0038] This embodiment also provides an electrode installation structure for a high-voltage electromagnetic flowmeter, referring to Figure 5 A high-pressure electromagnetic flowmeter lining is formed by adopting the above-disclosed high-pressure electromagnetic flowmeter lining molding process, a sealing gasket 91 is arranged in the electrode seat 31, the sealing gasket 91 abuts on the positioning step surface 312 and is sleeved on the detection electrode 5, and an insulating sheet 92 is arranged on the surface of the sealing gasket 91, the insulating sheet 92 is made of sulfone or polyformaldehyde, the insulating sheet 92 is also sleeved on the detection electrode 5 and abuts against the surface of the sealing gasket 91, a locking nut 93 is connected to the threaded hole 311 of the electrode seat 31, the center of the locking nut 93 is provided with a hole, the locking nut 93 is used to squeeze the insulating sheet 92, so that the insulating sheet 92 and the sealing gasket 91 are fixed to the detection electrode 5, and a screw 94 for connecting the lead is installed on the detection electrode 5 from the hole position at the center of the locking nut 93, and the screw 94 is threadedly connected to the electrode screw hole 54 of the detection electrode 5.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-voltage electromagnetic flowmeter lining molding process, the electromagnetic flowmeter comprising a housing (3), two symmetrical electrode seats (31) being arranged on the outer wall of the housing (3), and detection electrodes (5) being fixedly arranged in the electrode seats (31), characterized in that: The invention comprises inserting a left half mold (1) and a right half mold (2) at both ends of a shell (3), the mold seam of the left half mold (1) and the right half mold (2) being located on the plane where two detection electrodes (5) are located, and grooves (11) are provided on the left half mold (1) and the right half mold (2) at positions corresponding to the detection electrodes (5); before injection molding, the left half mold (1) and the right half mold (2) are molded together, and the ends of the detection electrodes (5) are inserted into the hemispherical shape formed by the two grooves (11), and the material for forming the lining (4) is injected into the injection molding cavity (14) between the shell (3) and the left half mold (1) and the right half mold (2), and the mold is demoulded after cooling, and the excess material (8) formed at the ends of the detection electrodes (5) is removed.

2. A high-pressure electromagnetic flowmeter lining forming process according to claim 1, characterized in that: The housing (3) is provided with a through hole (32), the diameter of the through hole (32) being greater than the diameter of the detection electrode (5); the electrode holder (31) is provided with an electrode mounting hole (313); the detection electrode (5) comprises a main body (51) and a positioning portion (52); the positioning portion (52) is located at one end of the main body (51) and in the electrode mounting hole (313); the diameter of the electrode mounting hole (313) is greater than the diameter of the positioning portion (52).

3. The high-pressure electromagnetic flowmeter lining forming process according to claim 2 is characterized in that: A plurality of annular grooves (521) are provided on the outer peripheral wall of the positioning portion (52).

4. The high-pressure electromagnetic flowmeter lining forming process according to claim 2 is characterized in that: The electrode seat (31) is provided with a threaded hole (311), the diameter of the threaded hole (311) is larger than the diameter of the electrode mounting hole (313), and the electrode mounting hole (313) is located at the bottom of the threaded hole (311), the center line of the electrode mounting hole (313) coincides with the center line of the threaded hole (311), and a positioning step surface (312) is formed at the bottom of the electrode mounting hole (313), and one side of the positioning portion (52) is flush with the positioning step surface (312).

5. The high-pressure electromagnetic flowmeter lining forming process according to claim 4 is characterized in that: The threaded hole (311) is internally threadedly connected to a plug (6), a center hole (61) is provided at the center of the plug (6), a connecting bolt (7) is provided in the center hole (61), an end face of the plug (6) abuts against the positioning step face (312), the connecting bolt (7) is threadedly connected to the detection electrode (5), and the positioning portion (52) abuts against the end face of the plug (6) through the connecting bolt (7).

6. A high-pressure electromagnetic flowmeter lining forming process according to claim 5, characterized in that: A conical portion (71) is provided at the connection between the nut of the connecting bolt (7) and the screw rod, the center line of the conical portion (71) coincides with the center line of the connecting bolt (7), the smaller end of the conical portion (71) is away from the nut of the connecting bolt (7), and the conical portion (71) is used to be inserted into the center hole (61), and the conical surface of the conical portion (71) abuts against the end of the center hole (61).

7. The high-pressure electromagnetic flowmeter lining forming process according to claim 1 is characterized in that: The left half mold (1) and the right half mold (2) are both provided with a flange portion (12), the center line of the flange portion (12) coincides with the center line of the left half mold (1) and the right half mold (2), the flange portion (12) is provided with an injection hole (13) connected to the injection cavity (14), and the diameter of the flange portion (12) is equal to the outer diameter of the housing (3).

8. A high-pressure electromagnetic flowmeter lining, characterized in that: A high-voltage electromagnetic flowmeter lining molding process as described in any one of claims 1 to 7 is adopted, wherein a shell (3) is arranged on the outer side of the lining (4), and two electrode seats (31) are provided on the side walls of the shell (3), an electrode mounting hole (313) is arranged in the electrode seat (31), a positioning step surface (312) is arranged at the end of the electrode mounting hole (313), a detection electrode (5) is arranged in the electrode mounting hole (313), a connecting ring (41) is formed in the through hole (32) on the shell (3) for mounting the detection electrode (5), a blocking block (42) is formed in the electrode mounting hole (313), the lining (4), the connecting ring (41) and the blocking block (42) are integrally arranged and molded, and the blocking block (42) is flush with the positioning step surface (312).

9. An electrode mounting structure for a high-voltage electromagnetic flowmeter, characterized in that: A high-voltage electromagnetic flowmeter lining as claimed in claim 8 is provided, wherein a sealing gasket (91) is arranged in the electrode seat (31), the sealing gasket (91) abuts against the positioning step surface (312), an insulating sheet (92) is arranged on the side of the sealing gasket (91) away from the positioning step surface (312), and a locking nut (93) is threadedly connected to the electrode seat (31), and the locking nut (93) is used to abut against the insulating sheet (92) and fix the detection electrode (5) through the insulating sheet (92) and the sealing gasket (91).

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