Anti-coking wedge-shaped flowmeter

Abstract

The utility model relates to the technical field of wedge-shaped flow meters, and discloses an anti-coking wedge-shaped flow meter which comprises a first round pipe, a second round pipe, a cylindrical piece, a wedge-shaped block, a rectangular plate, an electric heating pipe, a rectangular ring and a liquid medium. In the using process, the wedge-shaped block is used for playing a role in throttling so as to generate differential pressure in square relation with a flow value on the upstream side and the downstream side of the wedge-shaped block, then the differential pressure is led out from the second circular pipes on the two sides and sent to the differential pressure transmitter to be converted into an electric signal to be output, and the flow value can be obtained after the electric signal is calculated through the special intelligent flow calculation instrument. Heat can be generated by controlling the electric heating tube to work and is transmitted to the wedge-shaped block through the liquid medium. The temperature of the wedge-shaped block is kept at a high level, so that high-temperature gas is prevented from being coked when flowing through the surface of the wedge-shaped block. Therefore, the accuracy of measurement results is improved. Moreover, the rectangular plate and the wedge-shaped block can be taken out after the rectangular ring is detached from the cylindrical part, so that subsequent maintenance, cleaning and replacement are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of wedge flowmeters, for example, to an anti-coking wedge flowmeter. Background Art

[0002] The related art (Announcement No.: CN211877133U) discloses a detachable wedge flowmeter, which includes a measuring tube and a wedge assembly inserted from the outside of the measuring tube wall to the inside of the measuring tube wall, wherein the wedge assembly is detachably connected to the measuring tube and includes a wedge block.

[0003] In the process of implementing the above embodiments, it is found that there are at least the following problems in the related art:

[0004] The detachable wedge flowmeter adopts a detachable connection arrangement between the wedge assembly and the measuring tube, which is convenient for disassembly of the wedge assembly and replacement of the wedge block. However, when measuring a gas containing a viscous medium that is easy to coke, the viscous medium will slowly coke when it encounters the wedge block, which may easily cause the surface of the throttling piece to be uneven after a long time, thereby causing inaccurate measurement.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiment of the present disclosure provides an anti-coking wedge flowmeter to prevent coking on the surface of the wedge block.

[0008] In some embodiments, the anti-coking wedge flowmeter includes: a first circular tube, the first circular tube includes a rectangular hole opened on its side wall; a second circular tube, connected to the outer wall of the first circular tube, and located on both sides of the rectangular hole along the axial direction of the first circular tube, the second circular tubes on both sides are connected to the first circular tube, and the axes of the second circular tubes on both sides are perpendicular to the axis of the first circular tube; a cylindrical member, connected to the outer wall of the first circular tube and surrounding the rectangular hole; a wedge block, installed in the interior of the cylindrical member and penetrated through the rectangular hole, the wedge block includes a wedge-shaped groove opened on its end face; a rectangular plate, installed in the interior of the cylindrical member, used to block the wedge-shaped groove; an electric heating tube, installed on the rectangular plate, the heating end of the electric heating tube is located in the interior of the wedge-shaped groove; a rectangular ring, detachably installed on the end face of the cylindrical member, used to press the rectangular plate, and the wiring end of the electric heating tube passes through the inner side of the rectangular ring; a liquid medium, added to the interior of the wedge-shaped groove, and the electric heating tube is inserted into the liquid medium.

[0009] Optionally, the cylindrical component includes: a first rectangular cylinder, which is distributed on the same center line as the rectangular hole; an arched limiting portion, which is connected to one end of the first rectangular cylinder and welded to the outer wall of the first circular tube; and a rectangular connecting portion, which is connected to the other end of the first rectangular cylinder and is used for detachable connection with the rectangular ring.

[0010] Optionally, it also includes: a bolt passing through the rectangular ring and the rectangular connecting portion; and a nut threadedly connected to the bolt.

[0011] Optionally, the wedge block also includes: a second rectangular tube, which is penetrated by the arched limiting portion and the rectangular hole; a wedge-shaped detection portion, which is connected to one end of the second rectangular tube and is located inside the first circular tube, the tip of the wedge-shaped detection portion is processed into an arc shape, and the outer wall of the wedge-shaped detection portion is opened in the water flow trough; a rectangular limiting portion, which is connected to the other end of the second rectangular tube and is located between the arched limiting portion and the rectangular plate, and the internal space of the rectangular limiting portion, the wedge-shaped detection portion and the second rectangular tube together form the wedge-shaped groove.

[0012] Optionally, it also includes: a first sealing ring installed at the contact point between the arched limiting portion and the rectangular connecting portion.

[0013] Optionally, it also includes: a second sealing ring installed at the contact point between the wedge block and the rectangular plate.

[0014] Optionally, it also includes: a third sealing ring installed at the contact point between the cylindrical member and the rectangular ring.

[0015] Optionally, it also includes: a first flange plate, which is welded to both ends of the first circular tube respectively.

[0016] Optionally, it also includes: a second flange plate, which is welded to the ends of the second circular tube on both sides respectively.

[0017] The anti-coking wedge flowmeter provided by the embodiment of the present disclosure can achieve the following technical effects:

[0018] An anti-coking wedge flowmeter provided by the embodiment of the present disclosure includes a first circular tube, a second circular tube, a cylindrical member, a wedge block, a rectangular plate, an electric heating tube, a rectangular ring and a liquid medium. The first circular tube includes a rectangular hole opened on its side wall, and the rectangular hole is used to accommodate the wedge block. The second circular tube is connected to the outer wall of the first circular tube, and is located on both sides of the rectangular hole along the axial direction of the first circular tube. The second circular tubes on both sides are connected to the first circular tube, and the axes of the second circular tubes on both sides are perpendicular to the axis of the first circular tube, and are used to be connected to the differential pressure transmitter. The cylindrical member is connected to the outer wall of the first circular tube and surrounds the rectangular hole, which is used to support the installation of the wedge block, the rectangular plate and the rectangular ring. The wedge block is installed inside the cylindrical member and penetrates the rectangular hole. The wedge block is used to play a throttling role, so as to generate a differential pressure in a square relationship with the flow value on its upstream and downstream sides. The wedge block includes a wedge groove opened on its end face, and the wedge groove is used to accommodate the liquid medium. The rectangular plate is installed inside the cylindrical part to block the wedge-shaped groove to prevent the liquid medium inside the wedge-shaped groove from flowing out from the inside of the wedge-shaped groove. The electric heating tube is installed on the rectangular plate, and the heating end of the electric heating tube is located inside the wedge-shaped groove to heat the liquid medium and then transfer the heat to the wedge-shaped block. The rectangular ring is detachably installed on the end face of the cylindrical part to press the rectangular plate to determine the position of the rectangular plate and the wedge-shaped block. The wiring terminal of the electric heating tube passes through the inner side of the rectangular ring and then is connected to an external power supply to generate heat. The liquid medium is added to the inside of the wedge-shaped groove, and the electric heating tube is inserted into the liquid medium to evenly transfer the heat generated by the electric heating tube to the wedge-shaped block.

[0019] The embodiment of the present disclosure provides an anti-coking wedge flowmeter. During use, the wedge block is used to play a throttling role, so as to generate a differential pressure in a square relationship with the flow value on its upstream and downstream sides, and then the differential pressure is drawn out from the second circular tube on both sides, sent to the differential pressure transmitter to be converted into an electrical signal output, and then the flow value can be obtained after calculation by a dedicated intelligent flow calculator. The operation of the electric heating pipe can be controlled to generate heat, which is transferred to the wedge block through the liquid medium. The temperature of the wedge block is kept at a high level to avoid coking when the high-temperature gas flows through the surface of the wedge block. Thereby improving the accuracy of the measurement results. In addition, since the rectangular plate and the wedge block can be taken out after the rectangular ring is disassembled from the cylindrical member, it is convenient for the subsequent maintenance of the electric heating pipe, cleaning of the wedge block and replacement of the liquid medium.

[0020] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by corresponding drawings, and these exemplary descriptions and drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are considered similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0022] Figure 1 It is a schematic diagram of the main cross-sectional structure of an anti-coking wedge flowmeter provided by an embodiment of the present disclosure;

[0023] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 3 It is a schematic diagram of a side cross-sectional structure of an anti-coking wedge flowmeter provided by an embodiment of the present disclosure;

[0025] Figure 4 It is a schematic diagram of the main structure of an anti-coking wedge flowmeter provided in an embodiment of the present disclosure.

[0026] Reference numerals:

[0027] 10: first round tube; 20: second round tube; 30: cylinder; 31: first rectangular tube; 32: arched limiter; 33: rectangular connecting portion; 40: wedge block; 41: second rectangular tube; 42: wedge-shaped detection portion; 43: rectangular limiter; 50: rectangular plate; 60: electric heating tube; 70: rectangular ring; 80: liquid medium; 90: bolt; 100: nut; 110: first sealing ring; 120: second sealing ring; 130: third sealing ring; 140: first flange; 150: second flange. DETAILED DESCRIPTION

[0028] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0029] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0031] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0032] Unless otherwise stated, the term "plurality" means two or more.

[0033] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0034] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0036] Combination Figures 1 to 4As shown, the embodiment of the present disclosure provides an anti-coking wedge flowmeter, including a first circular tube 10, a second circular tube 20, a cylindrical part 30, a wedge block 40, a rectangular plate 50, an electric heating tube 60, a rectangular ring 70 and a liquid medium 80. The first circular tube 10 includes a rectangular hole opened on its side wall, and the rectangular hole is used to accommodate the wedge block 40. The second circular tube 20 is connected to the outer wall of the first circular tube 10, and is located on both sides of the rectangular hole along the axial direction of the first circular tube 10. The second circular tubes 20 on both sides are connected to the first circular tube 10, and the axes of the second circular tubes 20 on both sides are perpendicular to the axis of the first circular tube 10, and are used to be connected to the differential pressure transmitter. The cylindrical part 30 is connected to the outer wall of the first circular tube 10 and surrounds the rectangular hole, and is used to support the installation of the wedge block 40, the rectangular plate 50 and the rectangular ring 70. The wedge block 40 is installed inside the cylindrical member 30 and penetrates the rectangular hole. The wedge block 40 is used to play a throttling role, so as to generate a differential pressure in a square relationship with the flow value on its upstream and downstream sides. The wedge block 40 includes a wedge groove opened on its end surface, and the wedge groove is used to accommodate the liquid medium 80. The rectangular plate 50 is installed inside the cylindrical member 30, and is used to block the wedge groove to prevent the liquid medium 80 inside the wedge groove from flowing out from the inside of the wedge groove. The electric heating pipe 60 is installed on the rectangular plate 50, and the heating end of the electric heating pipe 60 is located inside the wedge groove, which is used to heat the liquid medium 80 and then transfer the heat to the wedge block 40. The rectangular ring 70 is detachably installed on the end surface of the cylindrical member 30, and is used to press the rectangular plate 50 to determine the position of the rectangular plate 50 and the wedge block 40. The terminal of the electric heating pipe 60 passes through the inner side of the rectangular ring 70, and then an external power supply is connected to generate heat. The liquid medium 80 is added into the inside of the wedge-shaped groove, and the electric heating pipe 60 is inserted into the liquid medium 80 to evenly transfer the heat generated by the electric heating pipe 60 to the wedge-shaped block 40 .

[0037] The embodiment of the present disclosure provides an anti-coking wedge flowmeter. During use, the wedge block 40 is used to play a throttling role, so as to generate a differential pressure in a square relationship with the flow value on its upstream and downstream sides, and then the differential pressure is drawn out from the second circular tube 20 on both sides, sent to the differential pressure transmitter to be converted into an electrical signal output, and then the flow value can be obtained after calculation by a dedicated intelligent flow calculator. The operation of the electric heating pipe 60 can generate heat, which is transferred to the wedge block through the liquid medium 80. The temperature of the wedge block 40 is kept at a high level to avoid coking when the high-temperature gas flows through the surface of the wedge block 40. Thereby improving the accuracy of the measurement results. In addition, since the rectangular plate 50 and the wedge block 40 can be taken out after the rectangular ring 70 is disassembled from the cylindrical member 30, it is convenient to subsequently repair the electric heating pipe 60, clean the wedge block 40, and replace the liquid medium 80.

[0038] Optionally, combined Figures 1 to 4As shown, the cylindrical member 30 includes a first rectangular cylinder 31, an arched stopper 32 and a rectangular connecting portion 33. The first rectangular cylinder 31 is coaxially distributed with the rectangular hole. The arched stopper 32 is connected to one end of the first rectangular cylinder 31 and welded to the outer wall of the first circular tube 10. The rectangular connecting portion 33 is connected to the other end of the first rectangular cylinder 31 and is used to be detachably connected to the rectangular ring 70.

[0039] In the disclosed embodiment, the cylinder-shaped member 30 includes a first rectangular cylinder 31, an arched limiting portion 32 and a rectangular connecting portion 33. The two ends of the first rectangular cylinder 31 are respectively connected to the arched limiting portion 32 and the rectangular connecting portion 33 to determine the relative positions of the three. The arched limiting portion 32 is connected to one end of the first rectangular cylinder 31, welded to the outer wall of the first circular tube 10, and surrounds the rectangular hole. The rectangular connecting portion 33 is connected to the other end of the first rectangular cylinder 31, and is used to be detachably connected to the rectangular ring 70. During use, the first rectangular cylinder 31 is used to accommodate the rectangular plate 50 and the wedge block 40, the arched limiting portion 32 is used to limit one side of the rectangular plate 50 and the wedge block 40, and the rectangular ring 70 is installed on the rectangular connecting portion 33. It is used to limit the other side of the rectangular plate 50 and the wedge block 40, and finally fix the position of the rectangular plate 50 and the wedge block 40.

[0040] Optionally, combined Figures 1 to 4 As shown, it also includes a bolt 90 and a nut 100. The bolt 90 is inserted through the rectangular ring 70 and the rectangular connecting portion 33. The nut 100 is threadedly connected to the bolt 90.

[0041] In the embodiment of the present disclosure, a bolt 90 is further included which is passed through the rectangular ring 70 and the rectangular connecting portion 33, and a nut 100 which is threadedly connected to the bolt 90. The bolt 90 and the nut 100 are used as connecting members, which has the advantages of stable connection and easy disassembly.

[0042] Optionally, combined Figures 1 to 3 As shown, the wedge block 40 also includes a second rectangular tube 41, a wedge-shaped detection portion 42 and a rectangular limit portion 43. The second rectangular tube 41 is penetrated by the arch limit portion 32 and the rectangular hole. The wedge-shaped detection portion 42 is connected to one end of the second rectangular tube 41 and is located inside the first circular tube 10. The tip of the wedge-shaped detection portion 42 is processed into an arc shape, and the outer wall of the wedge-shaped detection portion 42 is opened in the water flow trough. The rectangular limit portion 43 is connected to the other end of the second rectangular tube 41 and is located between the arch limit portion 32 and the rectangular plate 50. The rectangular limit portion 43, the wedge-shaped detection portion 42 and the internal space of the second rectangular tube 41 together form a wedge-shaped groove.

[0043] In the disclosed embodiment, the wedge block 40 further includes a second rectangular tube 41, a wedge-shaped detection portion 42 and a rectangular stopper 43. The two ends of the second rectangular tube 41 are respectively connected to the wedge-shaped detection portion 42 and the rectangular stopper 43 to adjust the distance between the wedge-shaped detection portion 42 and the rectangular stopper 43. The wedge-shaped detection portion 42 is located inside the first circular tube 10 and is used to play a throttling role. The tip of the wedge-shaped detection portion 42 is processed in an arc shape, which is more conducive to the passage of gas and reduces the possibility of coking. The outer wall of the wedge-shaped detection portion 42 is opened in the water flow trough, so that the viscous medium in the gas becomes liquid due to high temperature, and is guided to flow down the edges on both sides through the grooves, and tries not to drip from the middle of the wedge surface, thereby reducing the measurement error. The rectangular stopper 43 is located between the arch stopper 32 and the rectangular plate 50, and is clamped and fixed by the arch stopper 32 and the rectangular plate 50, thereby fixing the position of the entire wedge block 40.

[0044] Optionally, combined Figures 1 to 3 As shown, the first sealing ring 110 is also included. The first sealing ring 110 is installed at the contact point between the arched limiting portion 32 and the rectangular connecting portion 33.

[0045] In the disclosed embodiment, a first sealing ring 110 is further included, which is installed at the contact point between the arched limiting portion 32 and the rectangular connecting portion 33. The first sealing ring 110 is used to improve the sealing performance to prevent leakage at the contact point between the arched limiting portion 32 and the rectangular connecting portion 33.

[0046] Optionally, combined Figures 1 to 3 As shown, the second sealing ring 120 is also included. The second sealing ring 120 is installed at the contact point between the wedge block 40 and the rectangular plate 50.

[0047] In the embodiment of the present disclosure, a second sealing ring 120 is further included, which is installed at the contact point between the wedge block 40 and the rectangular plate 50. The second sealing ring is used to improve the sealing performance to prevent leakage at the contact point between the wedge block 40 and the rectangular plate 50.

[0048] Optionally, combined Figures 1 to 3 As shown, a third sealing ring 130 is also included. The third sealing ring 130 is installed at the contact point between the cylindrical member 30 and the rectangular ring 70.

[0049] In the embodiment of the present disclosure, a third sealing ring 130 is further included, which is installed at the contact point between the cylindrical member 30 and the rectangular ring 70. The third sealing ring 130 is used to improve the sealing performance to prevent leakage at the contact point between the cylindrical member 30 and the rectangular ring 70.

[0050] Optionally, combined Figures 1 to 4 As shown, the first round tube 10 further includes a first flange 140. The first flange 140 is welded to both ends of the first round tube 10 respectively.

[0051] In the embodiment of the present disclosure, the first flanges 140 are further included and are respectively welded to the two ends of the first round tube 10. The first flanges 140 at the two ends are used as connectors to install the entire device on the pipeline to measure the flow of the medium in the pipeline.

[0052] Optionally, combined Figures 1 to 4 As shown, the second flange 150 is also included. The second flange 150 is welded to the ends of the second round tube 20 on both sides.

[0053] In the embodiment of the present disclosure, second flanges 150 are also included which are respectively welded to the ends of the second round tubes 20 on both sides. The second flanges 150 on both sides serve as connectors to facilitate connection with the differential pressure transmitter to lead out the differential pressure and complete the measurement.

[0054] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An anti-coking wedge flowmeter, characterized in that: include: A first circular tube, wherein the first circular tube includes a rectangular hole opened in a side wall thereof; A second circular tube connected to the outer wall of the first circular tube and located on both sides of the rectangular hole along the axial direction of the first circular tube, the second circular tubes on both sides are connected to the first circular tube, and the axes of the second circular tubes on both sides are perpendicular to the axis of the first circular tube; A cylindrical member connected to the outer wall of the first circular tube and surrounding the rectangular hole; A wedge block is installed inside the cylindrical member and penetrates the rectangular hole, and the wedge block includes a wedge groove opened on its end surface; A rectangular plate installed inside the cylindrical member to block the wedge-shaped groove; An electric heating pipe is installed on the rectangular plate, and the heating end of the electric heating pipe is located inside the wedge-shaped groove; A rectangular ring is detachably mounted on the end surface of the cylindrical member and is used to press the rectangular plate, and the terminal of the electric heating tube passes through the inner side of the rectangular ring; A liquid medium is added into the interior of the wedge-shaped groove, and the electric heating tube is inserted into the liquid medium.

2. The anti-coking wedge flowmeter according to claim 1, characterized in that: The cylindrical member comprises: A first rectangular tube, coaxially distributed with the rectangular hole; An arched limiting portion, connected to one end of the first rectangular tube and welded to the outer wall of the first circular tube; The rectangular connecting portion is connected to the other end of the first rectangular tube and is used for detachable connection with the rectangular ring.

3. The anti-coking wedge flowmeter according to claim 2, characterized in that: Also includes: A bolt is inserted through the rectangular ring and the rectangular connecting portion; A nut is threadedly connected to the bolt.

4. The anti-coking wedge flowmeter according to claim 2, characterized in that: The wedge block also includes: A second rectangular tube, passing through the arched limiting portion and the rectangular hole; A wedge-shaped detection portion is connected to one end of the second rectangular tube and is located inside the first circular tube. The tip of the wedge-shaped detection portion is processed into an arc shape, and the outer wall of the wedge-shaped detection portion is opened in the water flow trough. The rectangular limiting portion is connected to the other end of the second rectangular tube and is located between the arch limiting portion and the rectangular plate. The rectangular limiting portion, the wedge-shaped detection portion and the inner space of the second rectangular tube together form the wedge-shaped groove.

5. The anti-coking wedge flowmeter according to claim 4, characterized in that: Also includes: The first sealing ring is installed at the contact point between the arched limiting portion and the rectangular connecting portion.

6. An anti-coking wedge flowmeter according to any one of claims 1 to 5, characterized in that: Also includes: The second sealing ring is installed at the contact point between the wedge block and the rectangular plate.

7. An anti-coking wedge flowmeter according to any one of claims 1 to 5, characterized in that: Also includes: The third sealing ring is installed at the contact point between the cylindrical member and the rectangular ring.

8. An anti-coking wedge flowmeter according to any one of claims 1 to 5, characterized in that: Also includes: The first flange is welded to both ends of the first circular tube respectively.

9. An anti-coking wedge flowmeter according to any one of claims 1 to 5, characterized in that: Also includes: The second flanges are respectively welded to the ends of the second round tubes on both sides.

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