Magnetic resonance flowmeter probe structure

Abstract

The invention belongs to the technical field of flow meters, and discloses a magnetic resonance flow meter probe structure which comprises a magnet assembly, a probe end cover, a spool fixing disc and an antenna tube, the magnet assembly comprises a magnet disc and a plugging disc, a penetrating hole is formed in the probe end cover, a limiting check ring is arranged on one side of the probe end cover and annularly arranged on the periphery of the penetrating hole, and the magnet disc and the plugging disc are arranged on the periphery of the limiting check ring. The plugging disc is clamped in the limiting check ring, the line pipe fixing disc is installed on the other side of the probe end cover, a limiting hole is formed in the line pipe fixing disc, a lap joint ring groove is formed in the side, facing the probe end cover, of the line pipe fixing disc, the lap joint ring groove is annularly formed in the outer side of the limiting hole, and the limiting hole is configured to be provided with a limiting fluid pipe in a penetrating mode. And the end part of the antenna tube is clamped in the lap joint ring groove. According to the invention, the probe end cover limits and supports the magnet assembly through the limiting check ring, and the spool fixing disc limits and supports the antenna tube through the lap joint ring groove, so that the stability of the relative positions of the fluid tube, the antenna tube and the magnet assembly is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of flowmeters, and in particular to a magnetic resonance flowmeter probe structure. 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 and distributed in a special form in the probe 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 the probe structure of the magnetic resonance flowmeter, the magnet is required to be ring-shaped around the magnetic resonance antenna and the periphery of the measured fluid to form a stable and uniform magnetic field at the location of the antenna. Furthermore, the magnet is required to remain stable with the antenna tube and the fluid tube in the axial and radial directions.

[0004] In the existing magnetic resonance flowmeter probe structure, since the antenna tube and the fluid tube both need to use non-metallic materials in the magnetic field and cannot withstand large stress, and the entire magnet assembly has a large mass and needs to be wrapped around the antenna tube, the relative position stability of the fluid tube, antenna tube and magnet assembly, which are sequentially arranged from the inside to the outside, is poor, affecting the measurement accuracy of the magnetic resonance flowmeter. Summary of the invention

[0005] The object of the present invention is to provide a magnetic resonance flowmeter probe structure, which can ensure the stability of the relative positions of a fluid tube, an antenna tube and a magnet assembly which are sequentially sleeved from the inside to the outside.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The magnetic resonance flowmeter probe structure includes:

[0008] The magnet assembly comprises a magnet disk and a blocking disk, wherein a plurality of the magnet disks are provided, and the plurality of magnet disks are coaxially abutted to form a magnet column, and the blocking disk is provided at the end of the magnet column;

[0009] A probe end cover, wherein the probe end cover is provided with a through hole, a limit retaining ring is provided on one side of the probe end cover, the limit retaining ring is arranged around the outer circumference of the through hole, and the blocking disk is clamped in the limit retaining ring;

[0010] A wire tube fixing plate is installed on the other side of the probe end cover, a limiting hole is arranged on the wire tube fixing plate, a lap ring groove is arranged on the side of the wire tube fixing plate facing the probe end cover, the lap ring groove is arranged on the outside of the limiting hole, and the limiting hole is configured to pass a limiting fluid tube;

[0011] The antenna tube is inserted into the magnetic disk, the sealing disk and the probe end cover, and the end portion is clamped in the overlapping ring groove.

[0012] Preferably, a first alignment groove is provided on the outer wall of the sealing disk.

[0013] Preferably, a second alignment groove is provided on the outer wall of the probe end cover.

[0014] Preferably, a first connecting member is further included, a first connecting hole is provided on the sealing disk, a second connecting hole is provided on the probe end cover, and the first connecting member is passed through the first connecting hole and the second connecting hole to connect the sealing disk and the probe end cover.

[0015] Preferably, an adjustment block is further included, the sealing disk is provided with a first positioning groove, the probe end cover is provided with a second positioning groove, and the adjustment block is clamped between the first positioning groove and the second positioning groove.

[0016] Preferably, a separation retaining ring is provided on a side of the wire tube fixing plate facing the probe end cover, and the separation retaining ring is located between the overlapping ring groove and the limiting hole and extends into the insertion hole.

[0017] Preferably, a third alignment groove is provided on the outer wall of the wire tube fixing plate.

[0018] Preferably, a second connecting piece is further included, a third connecting hole is provided on the probe end cover, a fourth connecting hole is provided on the wire tube fixing plate, and the second connecting piece is passed through the third connecting hole and the fourth connecting hole to connect the probe end cover and the wire tube fixing plate.

[0019] Preferably, it further comprises an outer shell tube, the magnet assembly is arranged in the outer shell tube, and the probe end cover is connected to the end of the outer shell tube.

[0020] Preferably, a connecting flange is provided at the end of the outer shell tube, the limit retaining ring extends into the outer shell tube, and the connecting flange is connected to the probe end cover.

[0021] Beneficial effects of the present invention:

[0022] The probe end cover and the wire tube fixing plate are independent of each other. The probe end cover supports the magnet assembly through a limit ring. The wire tube fixing plate supports the antenna tube through an overlapping ring groove to ensure that the antenna tube does not move axially and radially. The fluid tube is supported through a limit hole. The wire tube fixing plate is installed on the probe end cover, thereby ensuring the stability of the relative positions of the fluid tube, antenna tube and magnet assembly arranged in sequence from the inside to the outside, thereby improving the measurement accuracy of the magnetic resonance flowmeter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a partial structural exploded diagram of the magnetic resonance flowmeter probe structure according to an embodiment of the present invention;

[0024] Figure 2 is a partial structural exploded diagram of the magnetic resonance flowmeter probe structure according to an embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of a magnet assembly according to an embodiment of the present invention;

[0026] Figure 4 is a schematic end view of the probe end cover according to an embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of one direction of the probe end cover according to an embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of another direction of the probe end cover according to an embodiment of the present invention;

[0029] Figure 7 It is a schematic structural diagram of one aspect of the wire tube fixing disk according to an embodiment of the present invention;

[0030] Figure 8 It is a structural schematic diagram of another direction of the wire tube fixing disk described in an embodiment of the present invention.

[0031] In the figure:

[0032] 1. Magnet assembly;

[0033] 11. Magnetic disk; 12. Sealing disk; 121. First alignment groove; 122. First connecting hole; 123. First positioning groove;

[0034] 2. Probe end cover;

[0035] 21. Insertion hole; 22. Limiting retaining ring; 23. Second alignment groove; 24. Second connecting hole; 25. Second positioning groove; 26. Third connecting hole;

[0036] 3. Wire tube fixing plate;

[0037] 31. Limiting hole; 32. Overlap ring groove; 33. Separating retaining ring; 34. Third alignment groove; 35. Fourth connecting hole;

[0038] 4. Antenna tube;

[0039] 5. A first connecting member;

[0040] 6. Adjustment block;

[0041] 7. Second connecting piece;

[0042] 8. Outer shell cylinder;

[0043] 81. Connecting flange;

[0044] 9. The third connecting piece. 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 8As shown, the present invention provides a magnetic resonance flowmeter probe structure, including a magnet assembly 1, a probe end cover 2, a wire tube fixing plate 3 and an antenna tube 4. Among them, the magnet assembly 1 includes a magnet disk 11 and a sealing disk 12. There are multiple magnet disks 11, and the multiple magnet disks 11 are coaxially abutted to form a magnet column. The sealing disk 12 is arranged at the end of the magnet column. A penetration hole 21 is arranged on the probe end cover 2, and a limiting retaining ring 22 is arranged on one side of the probe end cover 2. The limiting retaining ring 22 is arranged around the outer periphery of the penetration hole 21, and the sealing disk 12 is clamped in the limiting retaining ring 22. The wire tube fixing disk 3 is installed on the other side of the probe end cover 2. A limiting hole 31 is arranged on the wire tube fixing disk 3. A lap ring groove 32 is arranged on the side of the wire tube fixing disk 3 facing the probe end cover 2, and the lap ring groove 32 is arranged around the outer side of the limiting hole 31. The limiting hole 31 is configured to penetrate a limiting fluid tube. The antenna tube 4 is penetrated by the magnet disk 11, the sealing disk 12 and the probe end cover 2, and the end is clamped in the lap ring groove 32.

[0050] In the present invention, the probe end cover 2 and the wire tube fixing plate 3 are independent of each other. The probe end cover 2 supports the magnet assembly 1 through the limiting retaining ring 22, and the wire tube fixing plate 3 supports the antenna tube 4 through the overlapping ring groove 32 to ensure that the antenna tube 4 does not move axially and radially. The fluid tube is supported through the limiting hole 31. The wire tube fixing plate 3 is installed on the probe end cover 2, thereby ensuring the stability of the relative positions of the fluid tube, antenna tube 4 and magnet assembly 1 arranged in sequence from the inside to the outside, thereby improving the measurement accuracy of the magnetic resonance flowmeter.

[0051] Specifically, a first alignment groove 121 is provided on the outer wall of the blocking disk 12. By providing the first alignment groove 121, it is convenient to locate the position of the magnet assembly 1 during assembly.

[0052] More specifically, a second alignment groove 23 is provided on the outer wall of the probe end cover 2. The second alignment groove 23 is provided to facilitate positioning of the probe end cover 2 during assembly.

[0053] Specifically, the magnetic resonance flowmeter probe structure also includes a first connector 5, a first connecting hole 122 is provided on the blocking disk 12, and a second connecting hole 24 is provided on the probe end cover 2. The first connector 5 is inserted into the first connecting hole 122 and the second connecting hole 24 to connect the blocking disk 12 and the probe end cover 2. The above arrangement makes the connection between the blocking disk 12 and the probe end cover 2 more accurate and reliable, and is simple and convenient during disassembly and maintenance.

[0054] In this embodiment, the first connecting member 5 is a bolt, the first connecting hole 122 is a threaded hole, and the second connecting hole 24 is a countersunk hole. The bolt passes through the second connecting hole 24 and is screwed to the first connecting hole 122 to lock the sealing disk 12 and the probe end cover 2. The first connecting hole 122 and the second connecting hole 24 correspond to each other one by one, and a plurality of them are respectively provided. The plurality of second connecting holes 24 are arranged in sequence at intervals around the circumference of the penetration hole 21, and a bolt is passed through each second connecting hole 24.

[0055] More specifically, the magnetic resonance flowmeter probe structure further includes an adjustment block 6, a first positioning groove 123 is provided on the sealing disk 12, a second positioning groove 25 is provided on the probe end cover 2, and the adjustment block 6 is sandwiched between the first positioning groove 123 and the second positioning groove 25. By providing the adjustment block 6, the relative distance and coaxiality between the magnet assembly 1 and the probe end cover 2 can be adjusted.

[0056] In this embodiment, the first positioning groove 123 and the second positioning groove 25 correspond to each other one by one, and a plurality of them are respectively provided. The plurality of second positioning grooves 25 are located in the limit retaining ring 22, and are arranged in sequence in the circumferential direction of the through-hole 21. An adjustment block 6 is arranged in each second positioning groove 25, and the adjustment block 6 is cylindrical. Due to processing and installation errors, the length of the magnet assembly 1 and the probe end cover 2 may deviate from the design. At this time, the adjustment block 6 of the corresponding size can be clamped according to actual needs, so that the probe end cover 2 fits with the magnet assembly 1 through the adjustment block 6, and prevents the magnet assembly 1 from being offset in the axial direction or radial direction, thereby effectively ensuring the coaxiality of the magnet assembly 1 and the probe end cover 2, and then ensuring the coaxiality of the fluid tube, the antenna tube 4 and the magnet assembly 1.

[0057] Specifically, a separation ring 33 is provided on one side of the wire tube fixing plate 3 facing the probe end cover 2. The separation ring 33 is located between the lap ring groove 32 and the limiting hole 31 and extends into the insertion hole 21. By providing the separation ring 33, the probe end cover 2 and the antenna tube 4 can be reliably separated.

[0058] More specifically, a third alignment groove 34 is provided on the outer wall of the wire tube fixing plate 3. The third alignment groove 34 is provided to facilitate positioning of the wire tube fixing plate 3 during assembly.

[0059] Specifically, the magnetic resonance flowmeter probe structure also includes a second connector 7, a third connecting hole 26 is provided on the probe end cover 2, a fourth connecting hole 35 is provided on the wire tube fixing plate 3, and the second connector 7 is inserted into the third connecting hole 26 and the fourth connecting hole 35 to connect the probe end cover 2 and the wire tube fixing plate 3. The above arrangement makes the connection between the probe end cover 2 and the wire tube fixing plate 3 more accurate and reliable, and is simple and convenient during disassembly and maintenance.

[0060] In this embodiment, the second connecting member 7 is a bolt, the third connecting hole 26 is a threaded hole, and the fourth connecting hole 35 is a countersunk hole. The bolt passes through the fourth connecting hole 35 and is screwed to the third connecting hole 26 to lock the probe end cover 2 and the wire tube fixing plate 3. The third connecting hole 26 and the fourth connecting hole 35 correspond to each other one by one, and a plurality of them are respectively provided. The plurality of fourth connecting holes 35 are sequentially spaced around the circumference of the limiting hole 31, and a bolt is passed through each fourth connecting hole 35. When assembling the magnet assembly 1, the probe end cover 2 and the wire tube fixing plate 3, the first alignment groove 121, the second alignment groove 23 and the third alignment groove 34 are first positioned, and then fastened by the first connecting member 5 and the second connecting member 7.

[0061] Specifically, the magnetic resonance flowmeter probe structure further includes an outer shell 8, in which the magnet assembly 1 is disposed, and the probe end cover 2 is connected to the end of the outer shell 8. By providing the outer shell 8, the magnet assembly 1 can be protected.

[0062] More specifically, a connecting flange 81 is provided at the end of the outer shell tube 8, the limit retaining ring 22 extends into the outer shell tube 8, and the connecting flange 81 is connected to the probe end cover 2. By providing the connecting flange 81, the probe end cover 2 can be connected more conveniently, and the limit retaining ring 22 extends into the outer shell tube 8, which can reliably separate the outer shell tube 8 and the magnet assembly 1.

[0063] More specifically, a countersunk hole is provided on the connecting flange 81 , and a threaded hole is correspondingly provided on the probe end cover 2 . The bolt serving as the third connecting member 9 passes through the countersunk hole and is screwed into the threaded hole to connect the locking outer shell tube 8 and the probe end cover 2 .

[0064] In this embodiment, multiple magnet disks 11 of the magnet assembly 1 are coaxially abutted to form a magnet column, and a sealing disk 12 is respectively provided at both ends of the magnet column, and each sealing disk 12 is connected to a probe end cover 2 on the outer side facing away from the magnet column, the outer shell tube 8 is sleeved on the outer side of the magnet assembly 1, and is clamped between the two probe end covers 2, and each probe end cover 2 is connected to a wire tube fixing disk 3 on the side facing away from the outer shell tube 8, and the antenna tube 4 is passed through the magnet column, the two sealing disks 12 and the two probe end covers 2, and is clamped between the two wire tube fixing disks 3.

[0065] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods 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 implementation methods 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 magnetic resonance flowmeter probe structure, characterized in that: include: A magnet assembly (1) comprises a magnet disk (11) and a blocking disk (12), wherein a plurality of the magnet disks (11) are provided, and the plurality of magnet disks (11) are coaxially abutted to form a magnet column, and the blocking disk (12) is provided at the end of the magnet column; A probe end cover (2), wherein the probe end cover (2) is provided with a through hole (21), a limit retaining ring (22) is provided on one side of the probe end cover (2), the limit retaining ring (22) is arranged around the outer circumference of the through hole (21), and the blocking disk (12) is clamped in the limit retaining ring (22); A wire tube fixing plate (3) is installed on the other side of the probe end cover (2), a limiting hole (31) is arranged on the wire tube fixing plate (3), a lap ring groove (32) is arranged on the side of the wire tube fixing plate (3) facing the probe end cover (2), the lap ring groove (32) is arranged on the outside of the limiting hole (31), and the limiting hole (31) is configured to pass a limiting fluid tube; The antenna tube (4) is inserted into the magnetic disk (11), the blocking disk (12) and the probe end cover (2), and the end portion is clamped in the overlapping ring groove (32).

2. The magnetic resonance flowmeter probe structure according to claim 1, characterized in that: A first alignment groove (121) is provided on the outer wall of the blocking disk (12).

3. The magnetic resonance flowmeter probe structure according to claim 1, characterized in that: A second alignment groove (23) is provided on the outer wall of the probe end cover (2).

4. The magnetic resonance flowmeter probe structure according to claim 1, characterized in that: The invention also comprises a first connecting member (5), the blocking disk (12) is provided with a first connecting hole (122), the probe end cover (2) is provided with a second connecting hole (24), the first connecting member (5) is passed through the first connecting hole (122) and the second connecting hole (24), and connects the blocking disk (12) and the probe end cover (2).

5. The magnetic resonance flowmeter probe structure according to claim 1, characterized in that: The invention also comprises an adjustment block (6), the sealing disk (12) is provided with a first positioning groove (123), the probe end cover (2) is provided with a second positioning groove (25), and the adjustment block (6) is clamped between the first positioning groove (123) and the second positioning groove (25).

6. The magnetic resonance flowmeter probe structure according to claim 1, characterized in that: A separation retaining ring (33) is provided on one side of the wire tube fixing plate (3) facing the probe end cover (2); the separation retaining ring (33) is located between the overlapping ring groove (32) and the limiting hole (31), and extends into the insertion hole (21).

7. The magnetic resonance flowmeter probe structure according to claim 1, characterized in that: A third alignment groove (34) is provided on the outer wall of the wire tube fixing plate (3).

8. The magnetic resonance flowmeter probe structure according to claim 1, characterized in that: The probe end cover (2) is provided with a third connection hole (26), the wire tube fixing plate (3) is provided with a fourth connection hole (35), and the second connection piece (7) is passed through the third connection hole (26) and the fourth connection hole (35) to connect the probe end cover (2) and the wire tube fixing plate (3).

9. The magnetic resonance flowmeter probe structure according to any one of claims 1 to 8, characterized in that: It also comprises an outer shell tube (8), the magnet assembly (1) is arranged in the outer shell tube (8), and the probe end cover (2) is connected to the end of the outer shell tube (8).

10. The magnetic resonance flowmeter probe structure according to claim 9, characterized in that: A connecting flange (81) is provided at the end of the outer shell tube (8), the limit retaining ring (22) extends into the outer shell tube (8), and the connecting flange (81) is connected to the probe end cover (2).

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