Fluid pipe end connection structure of magnetic resonance flowmeter

Abstract

The invention belongs to the technical field of fluid metering, and discloses a fluid pipe end connection structure of a magnetic resonance flowmeter, which comprises a conversion joint, a connection joint and a locking assembly, the conversion joint comprises a plurality of conversion bodies, the conversion bodies are provided with fitting grooves, the inner walls of the fitting grooves are provided with clamping raised lines, the plurality of conversion bodies are sequentially connected along a ring shape, and the locking assembly is connected with the connection joint. A penetrating hole is defined by the multiple attaching grooves, the multiple clamping protruding strips are spliced to form a clamping protruding ring, the clamping protruding ring is arranged to be clamped in a clamping annular groove in the outer wall of the fluid pipe, the connecting joint is arranged to be fixedly arranged at one end of the metal pipe, the end, away from the metal pipe, of the connecting joint is an abutting end face, and a limiting groove is formed in the abutting end face. A circulation hole communicating with the metal pipe is formed in the groove bottom of the limiting groove, and the locking assembly is connected to the conversion connector and the connecting connector. In the invention, the conversion joint is fixed relative to the axial position of the fluid pipe, so that the acting force during end connection of the fluid pipe can be transmitted, the high-pressure-resistant requirement is met, and the disassembly, assembly and maintenance are simpler and more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of fluid metering, and in particular to a fluid pipe terminal connection structure of a magnetic resonance flowmeter. Background Art

[0002] The oil, gas and water multiphase flowmeter is an instrument for measuring the three-phase flow of oil, gas and water when crude oil is transported in a pipeline. Magnetic resonance (MR) technology, as a fluid component analysis technology, has the advantages of being non-invasive, green, environmentally friendly, efficient and accurate. It has been applied to the measurement of complex mixed-phase fluids in industrial sites. The magnetic resonance flowmeter uses low-field nuclear magnetic resonance technology. Unlike the medical high-field MRI (magnetic resonance imaging) which uses superconducting coils to provide the static magnetic field necessary for the nuclear magnetic resonance phenomenon, the low-field nuclear magnetic resonance probe uses ferromagnetic materials (neodymium iron boron, samarium cobalt, ferrite, etc.) to emit static magnetic fields. Hundreds of permanent magnet blocks are arranged on the magnetic assembly of the magnetic resonance flowmeter to meet the high magnetic field strength required for instrument measurement and the uniform magnetic field and gradient magnetic field required by different measurement methods.

[0003] In a magnetic resonance flowmeter, the fluid tube, antenna tube and magnet assembly are arranged in sequence from the inside to the outside. The fluid tube needs to be made of non-metallic materials. When in use, the fluid tube needs to be terminated with an external metal tube. The fluid tube termination structure of the existing magnetic resonance flowmeter cannot meet the high pressure resistance requirements, and makes the replacement and maintenance of the fluid tube complicated and cumbersome, affecting the measurement operation. Summary of the invention

[0004] The object of the present invention is to provide a fluid pipe termination structure of a magnetic resonance flowmeter, which can meet the requirements of high pressure resistance and make the replacement and maintenance of the fluid pipe simple and convenient.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The fluid pipe terminal connection structure of the magnetic resonance flowmeter includes:

[0007] A conversion joint, comprising a plurality of conversion bodies, wherein the conversion bodies are provided with fitting grooves, wherein the inner walls of the fitting grooves are provided with locking convex strips, wherein the plurality of conversion bodies are sequentially connected in a ring shape, wherein the plurality of fitting grooves are arranged to form a through-hole, wherein the plurality of locking convex strips are assembled to form a locking convex ring, wherein the outer wall of the fluid pipe is provided with a locking ring groove, wherein the locking convex ring is configured to be locked in the locking ring groove;

[0008] The connecting joint is configured to be fixedly mounted on one end of the metal pipe, the end of the connecting joint facing away from the metal pipe is an abutting end face, the abutting end face is provided with a limiting groove, and the bottom of the limiting groove is provided with a flow hole connected to the metal pipe;

[0009] The locking assembly is respectively connected to the conversion joint and the connecting joint, driving the abutting end surface to abut against the conversion joint. When the abutting end surface abuts against the conversion joint, the end of the fluid pipe abuts against the bottom of the limiting groove.

[0010] Preferably, the conversion joint further comprises a ring-joint fastener, the conversion body is provided with a connecting hole, and the ring-joint fastener is passed through the connecting holes of two adjacent conversion bodies.

[0011] Preferably, an end piece is provided on the converter, and when a plurality of the converters are connected in sequence along a ring, the plurality of end pieces are assembled to form an end flange, and the end flange is configured to be closely connected to the wire tube fixing plate.

[0012] Preferably, it further comprises an end fastening bolt, the end flange is provided with a fixing hole, the wire tube fixing plate is provided with a threaded hole, the end fastening bolt is passed through the fixing hole and is screwed to the threaded hole.

[0013] Preferably, an adapter plate is provided on the converter, and when a plurality of the converters are connected in sequence along a ring, the plurality of adapter plates are assembled to form an adapter flange, and the locking assembly is respectively connected to the adapter flange and the connecting joint.

[0014] Preferably, a connecting flange is provided on the outer wall of the connecting joint, and the locking assembly is respectively connected to the adapter flange and the connecting flange.

[0015] Preferably, the adapter flange and the connecting flange are parallel to each other and spaced apart.

[0016] Preferably, the locking assembly includes a locking bolt and a locking nut threaded on the locking bolt, the adapter flange is provided with a first locking hole, the connecting flange is provided with a second locking hole, the screw of the locking bolt is passed through the first locking hole and the second locking hole, and the adapter flange and the connecting flange are clamped between the head of the locking bolt and the locking nut.

[0017] Preferably, a first sealing ring is further included, a first sealing groove is provided on the outer wall of the fluid tube, the first sealing ring is sleeved in the first sealing groove, and is clamped between the inner wall of the limiting groove and the outer wall of the fluid tube.

[0018] Preferably, a second sealing ring is further included, the end of the fluid pipe is provided with a second sealing groove, the second sealing ring is clamped in the second sealing groove, and is clamped between the bottom of the limiting groove and the end of the fluid pipe.

[0019] Beneficial effects of the present invention:

[0020] The conversion joint is sleeved on the fluid pipe, and the locking convex ring is clamped in the locking ring groove, so that the axial position of the conversion joint relative to the fluid pipe is fixed, and the force applied when the fluid pipe is terminated can be transmitted. On this basis, the connecting joint and the locking assembly cooperate with each other to drive the end of the fluid pipe against the bottom of the limiting groove of the connecting joint, so that the fluid pipe and the metal pipe are connected, and the locking strength is higher, which meets the high pressure resistance requirement. When replacing and maintaining the fluid pipe, only the conversion joint and the locking assembly need to be disassembled and assembled, which is simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the fluid pipe termination structure of the magnetic resonance flowmeter according to an embodiment of the present invention when the fluid pipe and the metal pipe are terminated;

[0022] Figure 2 It is a schematic diagram of the structure of the conversion joint, the first sealing ring, the second sealing ring and the fluid pipe according to the embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the connection joint and the metal pipe according to the embodiment of the present invention;

[0024] Figure 4 yes Figure 1 A schematic cross-sectional view of the structure shown;

[0025] Figure 5 yes Figure 1 A schematic diagram of the structure shown in the figure cooperating with the wire tube fixing plate;

[0026] Figure 6 is a schematic structural diagram of a conversion joint according to an embodiment of the present invention;

[0027] Figure 7 is a schematic structural diagram of a converter according to an embodiment of the present invention;

[0028] Figure 8 is a schematic structural diagram of a fluid pipe according to an embodiment of the present invention;

[0029] Fig. 9 It is a schematic diagram of the partial structure of the fluid pipe described in the embodiment of the present invention.

[0030] In the figure:

[0031] 100, fluid pipe; 101, retaining ring groove; 102, first sealing groove; 103, second sealing groove;

[0032] 200. Metal pipe;

[0033] 300, probe end cover;

[0034] 400, outer shell cylinder;

[0035] 500, wire tube fixing plate;

[0036] 1. Adapter;

[0037] 11. Converter; 111. Fitting groove; 112. Stopping convex strip; 113. Connecting hole; 114. End piece; 115. Fixing hole; 116. Adapter piece; 117. First locking hole;

[0038] 12. Ring fasteners;

[0039] 2. Connect the joint;

[0040] 21. Limiting groove; 22. Flow hole; 23. Connecting flange; 24. Second locking hole;

[0041] 3. Locking assembly;

[0042] 31. Locking bolt; 32. Locking nut;

[0043] 4. The first sealing ring;

[0044] 5. Second sealing ring. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0049] like Figure 1-Figure 9 As shown, the present invention provides a fluid pipe termination structure of a magnetic resonance flowmeter, including a conversion joint 1, a connecting joint 2 and a locking assembly 3. The conversion joint 1 includes a plurality of conversion bodies 11, the conversion bodies 11 are provided with a fitting groove 111, the inner wall of the fitting groove 111 is provided with a locking convex strip 112, the plurality of conversion bodies 11 are connected in sequence along a ring shape, the plurality of fitting grooves 111 are arranged to form a through hole, the plurality of locking convex strips 112 are assembled to form a locking convex ring, the outer wall of the fluid pipe 100 is provided with a locking ring groove 101, the locking convex ring is configured to be locked in the locking ring groove 101, and the connecting joint 2 is provided with a locking convex strip 112. It is configured to be fixed on one end of the metal tube 200, and the end of the connecting joint 2 facing away from the metal tube 200 is an abutting end face, and a limiting groove 21 is provided on the abutting end face, and a flow hole 22 connected to the metal tube 200 is provided at the bottom of the limiting groove 21. The locking component 3 is respectively connected to the conversion joint 1 and the connecting joint 2, and the abutting end face is driven to abut against the conversion joint 1. When the abutting end face abuts against the conversion joint 1, the end of the fluid pipe 100 abuts against the bottom of the limiting groove 21.

[0050] In the present invention, the conversion joint 1 is sleeved on the fluid pipe 100, and the locking convex ring is clamped in the locking ring groove 101, so that the axial position of the conversion joint 1 relative to the fluid pipe 100 is fixed, and the force applied when the fluid pipe 100 is terminated can be transmitted. On this basis, the connecting joint 2 and the locking assembly 3 cooperate with each other to drive the end of the fluid pipe 100 to abut against the bottom of the limiting groove 21 of the connecting joint 2, so that the fluid pipe 100 and the metal pipe 200 are connected, and the locking strength is higher, which meets the requirement of high pressure resistance. When replacing and maintaining the fluid pipe 100, only the conversion joint 1 and the locking assembly 3 need to be disassembled and assembled, which is simpler and more convenient.

[0051] Specifically, the conversion joint 1 further includes a ring-joint fastener 12 . A connecting hole 113 is provided on the conversion body 11 . The ring-joint fastener 12 is passed through the connecting holes 113 of two adjacent conversion bodies 11 to fasten and connect the two adjacent conversion bodies 11 .

[0052] In this embodiment, the ring-joint fastener 12 includes a ring-joint bolt and a ring-joint nut. The ring-joint bolt is passed through the connecting hole 113 of two adjacent converters 11 and is threadedly connected with the ring-joint nut. Two converters 11 are provided, and the two ends of one converter 11 are connected to the two ends of the other converter 11 in a one-to-one correspondence. When connected, two ring-joint fasteners 12 are configured at each end.

[0053] Specifically, a terminal piece 114 is provided on the converter 11. When a plurality of converters 11 are connected in sequence along a ring, a plurality of terminal pieces 114 are assembled to form a terminal flange, and the terminal flange is configured to be closely connected to the wire tube fixing plate 500. By providing the terminal flange, the fluid tube 100 can be locked and connected to the wire tube fixing plate 500 through the conversion joint 1, so that the relative position between the fluid tube 100 and the antenna tube is more stable and reliable.

[0054] More specifically, the fluid pipe termination structure of the magnetic resonance flowmeter also includes an end fastening bolt, a fixing hole 115 is provided on the end flange, a threaded hole is provided on the wire pipe fixing plate 500, the end fastening bolt is passed through the fixing hole 115 and screwed to the threaded hole.

[0055] In this embodiment, a plurality of fixing holes 115 and threaded holes are respectively provided in a one-to-one correspondence, and the fixing holes 115 are evenly distributed along the circumference of the insertion hole. In the magnetic resonance flowmeter, a plurality of magnetic disks of the magnet assembly are coaxially abutted to form a magnet column, and a blocking disk is respectively provided at both ends of the magnet column, and each blocking disk is connected to a probe end cover 300 on the outer side away from the magnet column, and the outer shell tube 400 is sleeved on the outer side of the magnet assembly and clamped between the two probe end covers 300, and each probe end cover 300 is connected to a wire tube fixing disk 500 on the side away from the outer shell tube 400, and the antenna tube is passed through the magnet column, the two blocking disks and the two probe end covers 300, and is clamped between the two wire tube fixing disks 500, and each wire tube fixing disk 500 is connected to a conversion joint 1 on the side away from the probe end cover 300, and the fluid tube 100 is passed through the antenna tube and mounted on the two conversion joints 1.

[0056] Specifically, a transfer plate 116 is provided on the conversion body 11. When a plurality of conversion bodies 11 are connected in sequence along a ring, a plurality of transfer plates 116 are assembled to form a transfer flange, and the locking assembly 3 is respectively connected to the transfer flange and the connecting joint 2. By providing the transfer flange, the connection between the conversion joint 1 and the connecting joint 2 is more convenient.

[0057] More specifically, a connecting flange 23 is provided on the outer wall of the connecting joint 2, and the locking assembly 3 is respectively connected to the adapter flange and the connecting flange 23. By providing the connecting flange 23, the connection between the conversion joint 1 and the connecting joint 2 is more convenient.

[0058] In this embodiment, the adapter flange and the connecting flange 23 are parallel to each other and spaced apart, and the diameters of the adapter flange and the connecting flange 23 are equal, the adapter flange and the end flange are parallel to each other and spaced apart, and the diameter of the adapter flange is smaller than the diameter of the end flange, the adapter flange and the end flange are located at both ends of the axial direction of the adapter joint 1, and the connecting flange 23 is located at the end of the connecting joint 2 away from the adapter joint 1, so that during assembly, there is a movement margin between the adapter flange and the connecting flange 23, and the end of the fluid pipe 100 can be more tightly locked in the limit groove 21, and due to the difference in diameters, the adapter flange and the end flange are prevented from interfering with each other during the connection operation.

[0059] Specifically, the locking assembly 3 includes a locking bolt 31 and a locking nut 32 screwed to the locking bolt 31, a first locking hole 117 is provided on the adapter flange, a second locking hole 24 is provided on the connecting flange 23, the screw of the locking bolt 31 is inserted into the first locking hole 117 and the second locking hole 24, and the adapter flange and the connecting flange 23 are sandwiched between the head of the locking bolt 31 and the locking nut 32. The above arrangement enables the conversion joint 1 and the connecting joint 2 to be driven closer to each other by tightening the locking bolt 31 and the locking nut 32, which is more suitable for high-pressure resistant termination requirements.

[0060] In this embodiment, the first locking holes 117 correspond to the second locking holes 24 one by one, and a plurality of the first locking holes 117 are respectively provided. The plurality of first locking holes 117 are evenly distributed along the circumference of the mounting hole.

[0061] Specifically, the fluid pipe termination structure of the magnetic resonance flowmeter further includes a first sealing ring 4, a first sealing groove 102 is provided on the outer wall of the fluid pipe 100, the first sealing ring 4 is sleeved in the first sealing groove 102, and is sandwiched between the inner wall of the limiting groove 21 and the outer wall of the fluid pipe 100. The above arrangement improves the sealing effect when the fluid pipe 100 and the metal pipe 200 are terminated.

[0062] More specifically, the fluid pipe termination structure of the magnetic resonance flowmeter further includes a second sealing ring 5, the end of the fluid pipe 100 is provided with a second sealing groove 103, the second sealing ring 5 is clamped in the second sealing groove 103, and is sandwiched between the bottom of the limiting groove 21 and the end of the fluid pipe 100. The above arrangement further improves the sealing effect when the fluid pipe 100 and the metal pipe 200 are terminated.

[0063] In this embodiment, the first sealing ring 4 corresponds to the first sealing groove 102 one by one, and a plurality of first sealing grooves 102 are respectively provided. The plurality of first sealing grooves 102 are sequentially spaced apart along the direction away from the retaining ring groove 101 on the fluid pipe 100 .

[0064] When the fluid pipe termination structure of the magnetic resonance flowmeter of the present invention is installed and used, the conversion joint 1 and the connecting joint 2 are connected and fastened by the locking assembly 3, so that the first sealing ring 4 and the second sealing ring 5 on the fluid pipe 100 are abutted against the groove wall and the groove bottom of the limiting groove 21 of the connecting joint 2 for sealing, thereby achieving the effect of high pressure resistance. The end flange is used to connect the conversion joint 1 to the wire pipe fixing plate 500 to prevent the interconnected fluid pipe 100 and the metal pipe 200 from vibrating or displacing.

[0065] When disassembling and replacing the fluid tube 100, it is first necessary to remove the conversion joint 1 from the wire tube fixing plate 500, then remove the locking assembly 3, separate the conversion joint 1 and the connecting joint 2, and finally disassemble the two conversion bodies 11 of the conversion joint 1, and then the fluid tube 100 can be replaced, thereby achieving the purpose of convenient replacement.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A fluid pipe terminal connection structure of a magnetic resonance flowmeter, characterized in that: include: A conversion joint (1) comprises a plurality of conversion bodies (11), each of which is provided with a fitting groove (111), and a locking convex strip (112) is provided on the inner wall of the fitting groove (111); the plurality of conversion bodies (11) are connected in sequence along a ring shape, the plurality of fitting grooves (111) are arranged to form a through-hole, the plurality of locking convex strips (112) are assembled to form a locking convex ring, and a locking ring groove (101) is provided on the outer wall of a fluid pipe (100), and the locking convex ring is configured to be locked in the locking ring groove (101); A connecting joint (2) is configured to be fixedly mounted on one end of a metal pipe (200); the end of the connecting joint (2) facing away from the metal pipe (200) is an abutting end face; the abutting end face is provided with a limiting groove (21); and the bottom of the limiting groove (21) is provided with a flow hole (22) connected to the metal pipe (200); A locking assembly (3) is respectively connected to the conversion joint (1) and the connecting joint (2), and drives the abutting end surface to abut against the conversion joint (1). When the abutting end surface abuts against the conversion joint (1), the end of the fluid pipe (100) abuts against the bottom of the limiting groove (21).

2. The fluid pipe terminal connection structure of the magnetic resonance flowmeter according to claim 1, characterized in that: The conversion joint (1) further comprises a ring-joint fastener (12); a connection hole (113) is provided on the conversion body (11); and the ring-joint fastener (12) is inserted into the connection holes (113) of two adjacent conversion bodies (11).

3. The fluid pipe terminal connection structure of the magnetic resonance flowmeter according to claim 1, characterized in that: An end piece (114) is provided on the converter (11); when a plurality of the converters (11) are connected in sequence along a ring, the plurality of end pieces (114) are assembled to form an end flange; and the end flange is configured to be closely connected to a wire tube fixing plate (500).

4. The fluid pipe terminal connection structure of the magnetic resonance flowmeter according to claim 3, characterized in that: It also includes an end fastening bolt, the end flange is provided with a fixing hole (115), the wire tube fixing plate (500) is provided with a threaded hole, the end fastening bolt is passed through the fixing hole (115) and is screwed to the threaded hole.

5. The fluid pipe terminal connection structure of the magnetic resonance flowmeter according to claim 1, characterized in that: An adapter plate (116) is provided on the conversion body (11); when a plurality of the conversion bodies (11) are connected in sequence along a ring, the plurality of adapter plates (116) are assembled to form an adapter flange; and the locking assembly (3) is respectively connected to the adapter flange and the connecting joint (2).

6. The fluid pipe terminal connection structure of the magnetic resonance flowmeter according to claim 5, characterized in that: A connecting flange (23) is provided on the outer wall of the connecting joint (2), and the locking assembly (3) is respectively connected to the adapter flange and the connecting flange (23).

7. The fluid pipe terminal connection structure of the magnetic resonance flowmeter according to claim 6, characterized in that: The adapter flange and the connecting flange (23) are parallel to each other and spaced apart.

8. The fluid pipe terminal connection structure of the magnetic resonance flowmeter according to claim 6, characterized in that: The locking assembly (3) comprises a locking bolt (31) and a locking nut (32) screwed to the locking bolt (31); a first locking hole (117) is provided on the adapter flange, and a second locking hole (24) is provided on the connecting flange (23); the screw rod of the locking bolt (31) is inserted into the first locking hole (117) and the second locking hole (24); the adapter flange and the connecting flange (23) are sandwiched between the head of the locking bolt (31) and the locking nut (32).

9. The fluid pipe terminal connection structure of the magnetic resonance flowmeter according to claim 1, characterized in that: It also includes a first sealing ring (4), a first sealing groove (102) is provided on the outer wall of the fluid pipe (100), the first sealing ring (4) is sleeved in the first sealing groove (102), and is clamped between the inner wall of the limiting groove (21) and the outer wall of the fluid pipe (100).

10. The fluid pipe terminal connection structure of the magnetic resonance flowmeter according to claim 1, characterized in that: It also includes a second sealing ring (5), the end of the fluid pipe (100) is provided with a second sealing groove (103), the second sealing ring (5) is clamped in the second sealing groove (103), and is clamped between the bottom of the limiting groove (21) and the end of the fluid pipe (100).

Images