Magnetic resonance flowmeter probe structure

Abstract

The application 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 wire tube fixing disc and an antenna tube. The magnet assembly comprises a magnet disc and a blocking disc. The probe end cover is provided with a through hole. A limiting stop ring is arranged on one side of the probe end cover. The limiting stop ring is arranged around the outer periphery of the through hole. The blocking disc is clamped in the limiting stop ring. The wire tube fixing disc is installed on the other side of the probe end cover. The wire tube fixing disc is provided with a limiting hole. The side of the wire tube fixing disc facing the probe end cover is provided with a lap joint ring groove. The lap joint ring groove is arranged around the outer side of the limiting hole. The limiting hole is configured to pass through and limit the fluid tube. The end of the antenna tube is clamped in the lap joint ring groove. In the application, the probe end cover limits and supports the magnet assembly through the limiting stop ring, and the wire tube 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] This invention relates to the field of flow meter technology, and in particular to a magnetic resonance flow meter probe structure. Background Technology

[0002] Multiphase flow meters for oil, gas, and water are instruments used to measure the flow rates of oil, gas, and water during crude oil transportation in pipelines. Magnetic resonance (MR) technology, as a fluid composition analysis technique, offers advantages such as non-invasiveness, environmental friendliness, high efficiency, and accuracy, and is currently applied in industrial settings for measuring complex multiphase fluids. MR flow meters utilize low-field nuclear magnetic resonance technology. Unlike high-field MRI in medicine, which uses superconducting coils to provide the static magnetic field necessary for generating the nuclear magnetic resonance phenomenon, low-field MR probes emit static magnetic fields using ferromagnetic materials (neodymium iron boron, samarium cobalt, ferrite, etc.). The probe contains hundreds of permanent magnet blocks arranged in a specific pattern to meet the high magnetic field strength required for instrument measurement and the uniform magnetic field and gradient magnetic field requirements of different measurement methods.

[0003] The probe structure of a magnetic resonance flowmeter requires a magnet to be arranged in a ring around the magnetic resonance antenna and the fluid being measured, forming a stable and uniform magnetic field at the location of the antenna. Furthermore, the magnet needs to remain stable with the antenna tube and the fluid tube in both the axial and radial directions.

[0004] In the existing magnetic resonance flowmeter probe structure, the antenna tube and fluid tube both need to be made of non-metallic materials that cannot withstand large stresses in the magnetic field. In addition, the entire magnet assembly has a large mass and needs to be wrapped around the antenna tube. This results in poor relative positional stability of the fluid tube, antenna tube and magnet assembly that are nested from the inside out, which affects the accuracy of the magnetic resonance flowmeter measurement. Summary of the Invention

[0005] The purpose of this invention is to provide a magnetic resonance flowmeter probe structure that can ensure the stability of the relative positions of the fluid tube, antenna tube and magnet assembly that are sequentially nested from the inside out.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The magnetic resonance flowmeter probe structure includes:

[0008] A magnet assembly includes a magnet disk and a sealing disk. Multiple magnet disks are provided, and the multiple magnet disks are coaxially connected to form a magnet column. The sealing disk is disposed at the end of the magnet column.

[0009] The probe end cap has a through hole and a limit ring on one side. The limit ring is arranged around the outer periphery of the through hole, and the sealing disc is fitted into the limit ring.

[0010] A conduit fixing plate is installed on the other side of the probe end cover. The conduit fixing plate is provided with a limiting hole. An overlapping ring groove is provided on the side of the conduit fixing plate facing the probe end cover. The overlapping ring groove is arranged around the outside of the limiting hole. The limiting hole is configured to insert a limiting fluid tube.

[0011] The antenna tube is inserted into the magnet disk, the sealing disk and the probe end cap, and its end is fitted into the overlapping ring groove.

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

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

[0014] Preferably, the device also includes a first connector, wherein the sealing disc has a first connection hole and the probe end cap has a second connection hole, and the first connector passes through the first connection hole and the second connection hole to connect the sealing disc and the probe end cap.

[0015] Preferably, the device also includes an adjustment block, wherein the sealing disc is provided with a first positioning groove, the probe end cap is provided with a second positioning groove, and the adjustment block is sandwiched between the first positioning groove and the second positioning groove.

[0016] Preferably, the conduit fixing plate is provided with a partition ring on the side facing the probe end cap. The partition 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 conduit fixing plate.

[0018] Preferably, the device also includes a second connector. The probe end cap has a third connecting hole, and the conduit fixing plate has a fourth connecting hole. The second connector passes through the third connecting hole and the fourth connecting hole to connect the probe end cap and the conduit fixing plate.

[0019] Preferably, the device also includes an outer casing, in which the magnet assembly is disposed, and the probe end cap is connected to the end of the outer casing.

[0020] Preferably, the end of the outer shell is provided with a connecting flange, the limiting ring extends into the outer shell, and the connecting flange is connected to the probe end cap.

[0021] The beneficial effects of this invention are:

[0022] The probe end cap and the conduit fixing plate are independent of each other. The probe end cap provides limiting support for the magnet assembly through a limiting retaining ring, and the conduit fixing plate provides limiting support for the antenna tube through an overlapping ring groove, ensuring that the antenna tube does not shift axially or radially. The fluid tube is also provided with limiting support through a limiting hole. The conduit fixing plate is installed on the probe end cap, thereby ensuring the stability of the relative positions of the fluid tube, antenna tube, and magnet assembly, which are sequentially nested from the inside out, and improving the measurement accuracy of the magnetic resonance flowmeter. Attached Figure Description

[0023] Figure 1 This is a partially exploded view of the magnetic resonance flowmeter probe structure described in an embodiment of the present invention;

[0024] Figure 2 This is a partial exploded view of the magnetic resonance flowmeter probe structure described in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the magnet assembly described in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the end face of the probe end cap according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the probe end cap in one orientation according to an embodiment of the present invention;

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

[0029] Figure 7 This is a schematic diagram of the structure of the conduit fixing plate in one orientation according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the conduit fixing plate from another direction according to an embodiment of the present invention.

[0031] In the picture:

[0032] 1. Magnet assembly;

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

[0034] 2. Probe end cap;

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

[0036] 3. Conduit fixing plate;

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

[0038] 4. Antenna tube;

[0039] 5. First connector;

[0040] 6. Adjustment block;

[0041] 7. Second connector;

[0042] 8. Outer shell;

[0043] 81. Connecting flange;

[0044] 9. Third connector. Detailed Implementation

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

[0046] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] like Figures 1-8As shown, the present invention provides a magnetic resonance flowmeter probe structure, including a magnet assembly 1, a probe end cap 2, a conduit fixing plate 3, and an antenna tube 4. The magnet assembly 1 includes a magnet disk 11 and a sealing disk 12. Multiple magnet disks 11 are provided, and multiple magnet disks 11 are coaxially connected to form a magnet column. The sealing disk 12 is provided at the end of the magnet column. The probe end cap 2 is provided with a through hole 21. A limit ring 22 is provided on one side of the probe end cap 2. The limit ring 22 is arranged around the outer periphery of the through hole 21. The sealing disk 12 is locked in the limit ring 22. The conduit fixing disk 3 is installed on the other side of the probe end cap 2. The conduit fixing disk 3 is provided with a limit hole 31. The side of the conduit fixing disk 3 facing the probe end cap 2 is provided with an overlapping ring groove 32. The overlapping ring groove 32 is arranged around the outside of the limit hole 31. The limit hole 31 is configured to pass through and limit the fluid tube. The antenna tube 4 passes through the magnet disk 11, the sealing disk 12 and the probe end cap 2, and its end is locked in the overlapping ring groove 32.

[0050] In this invention, the probe end cap 2 and the conduit fixing plate 3 are independent of each other. The probe end cap 2 provides limiting support for the magnet assembly 1 through the limiting retaining ring 22, and the conduit fixing plate 3 provides limiting support for the antenna tube 4 through the overlapping ring groove 32, ensuring that the antenna tube 4 does not have axial or radial displacement. The fluid tube is provided with limiting support through the limiting hole 31. The conduit fixing plate 3 is installed on the probe end cap 2, thereby ensuring the stability of the relative positions of the fluid tube, antenna tube 4 and magnet assembly 1, which are sequentially nested from the inside out, and improving the measurement accuracy of the magnetic resonance flowmeter.

[0051] Specifically, a first alignment groove 121 is provided on the outer wall of the sealing disc 12. By providing the first alignment groove 121, it is convenient to position 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. By providing the second alignment groove 23, it is convenient to position 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 on the sealing disc 12, and a second connecting hole 24 on the probe end cap 2. The first connector 5 passes through the first connecting hole 122 and the second connecting hole 24, connecting the sealing disc 12 and the probe end cap 2. This configuration makes the connection between the sealing disc 12 and the probe end cap 2 more precise and reliable, and also simplifies and facilitates disassembly and maintenance.

[0054] In this embodiment, the first connector 5 is a bolt, the first connecting hole 122 is a threaded hole, and the second connecting hole 24 is a countersunk hole. After the bolt passes through the second connecting hole 24, it is screwed into the first connecting hole 122 to lock the sealing plate 12 and the probe end cap 2. The first connecting hole 122 and the second connecting hole 24 are one-to-one and there are multiple of them. The multiple second connecting holes 24 are arranged sequentially at intervals around the circumference of the through hole 21, and a bolt is inserted into each second connecting hole 24.

[0055] More specifically, the magnetic resonance flowmeter probe structure also includes an adjustment block 6. A first positioning groove 123 is provided on the sealing disc 12, and a second positioning groove 25 is provided on the probe end cap 2. The adjustment block 6 is sandwiched between the first positioning groove 123 and the second positioning groove 25. By setting the adjustment block 6, the relative distance and coaxiality between the magnet assembly 1 and the probe end cap 2 can be adjusted to ensure this.

[0056] In this embodiment, the first positioning groove 123 and the second positioning groove 25 are one-to-one corresponding, and multiple second positioning grooves 25 are respectively provided. The multiple second positioning grooves 25 are located in the limiting retaining ring 22 and are arranged sequentially at intervals around the circumference of the through hole 21. Each second positioning groove 25 is provided with an adjustment block 6, which is cylindrical. Due to processing and installation errors, the length of the magnet assembly 1 and the probe end cap 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 cap 2 fits with the magnet assembly 1 through the adjustment block 6, preventing the magnet assembly 1 from shifting in position in the axial or radial direction. This can effectively ensure the coaxiality of the magnet assembly 1 and the probe end cap 2, and thus ensure the coaxiality of the fluid tube, antenna tube 4 and magnet assembly 1.

[0057] Specifically, a separating retaining ring 33 is provided on the side of the conduit fixing plate 3 facing the probe end cover 2. The separating retaining ring 33 is located between the overlapping ring groove 32 and the limiting hole 31, and extends into the through hole 21. By providing the separating retaining 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 conduit fixing plate 3. By providing the third alignment groove 34, it is convenient to position the conduit fixing plate 3 during assembly.

[0059] Specifically, the magnetic resonance flowmeter probe structure also includes a second connector 7. The probe end cap 2 has a third connecting hole 26, and the conduit fixing plate 3 has a fourth connecting hole 35. The second connector 7 passes through the third connecting hole 26 and the fourth connecting hole 35, connecting the probe end cap 2 and the conduit fixing plate 3. This design makes the connection between the probe end cap 2 and the conduit fixing plate 3 more precise and reliable, and also simplifies disassembly and maintenance.

[0060] In this embodiment, the second connector 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 into the third connecting hole 26, locking the probe end cap 2 and the conduit fixing plate 3. The third connecting hole 26 and the fourth connecting hole 35 are one-to-one, and multiple fourth connecting holes 35 are provided. These multiple fourth connecting holes 35 are arranged sequentially at intervals around the circumference of the limiting hole 31, and one bolt is inserted into each fourth connecting hole 35. When assembling the magnet assembly 1, the probe end cap 2, and the conduit 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 using the first connector 5 and the second connector 7.

[0061] Specifically, the magnetic resonance flowmeter probe structure also includes a housing 8, a magnet assembly 1 housed within the housing 8, and a probe end cap 2 connected to the end of the housing 8. The housing 8 provides protection for the magnet assembly 1.

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

[0063] More specifically, a countersunk hole is provided on the connecting flange 81, and a corresponding threaded hole is provided on the probe end cap 2. The bolt, which serves as the third connecting member 9, passes through the countersunk hole and is screwed into the threaded hole to connect and lock the outer casing 8 and the probe end cap 2.

[0064] In this embodiment, multiple magnet disks 11 of the magnet assembly 1 are coaxially abutted to form a magnet column. A sealing disk 12 is provided at each end of the magnet column. A probe end cap 2 is connected to the outer side of each sealing disk 12 away from the magnet column. The outer shell 8 is sleeved on the outer side of the magnet assembly 1 and sandwiched between the two probe end caps 2. A wire tube fixing disk 3 is connected to the side of each probe end cap 2 away from the outer shell 8. The antenna tube 4 passes through the magnet column, the two sealing disks 12 and the two probe end caps 2 and is sandwiched between the two wire tube fixing disks 3.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A magnetic resonance flowmeter probe structure, characterized in that, include: The magnet assembly (1) includes a magnet disk (11) and a sealing disk (12). Multiple magnet disks (11) are provided, and multiple magnet disks (11) are coaxially connected to form a magnet column. The sealing disk (12) is provided at the end of the magnet column. The probe end cap (2) is provided with a through hole (21). A limit ring (22) is provided on one side of the probe end cap (2). The limit ring (22) is arranged around the outer periphery of the through hole (21). The sealing disc (12) is fitted into the limit ring (22). A conduit fixing plate (3) is installed on the other side of the probe end cap (2). The conduit fixing plate (3) is provided with a limiting hole (31). The conduit fixing plate (3) is provided with an overlapping ring groove (32) on the side facing the probe end cap (2). The overlapping ring groove (32) is arranged around the outside of the limiting hole (31). The limiting hole (31) is configured to insert a limiting fluid tube. The antenna tube (4) is inserted into the magnet disk (11), the sealing disk (12) and the probe end cap (2), and its end is fitted into the overlapping ring groove (32); It also includes an adjustment block (6), the sealing plate (12) is provided with a first positioning groove (123), the probe end cap (2) is provided with a second positioning groove (25), and the adjustment block (6) is sandwiched between the first positioning groove (123) and the second positioning groove (25); The conduit fixing plate (3) is provided with a separating retaining ring (33) on the side facing the probe end cap (2). The separating retaining ring (33) is located between the overlapping ring groove (32) and the limiting hole (31) and extends into the insertion hole (21).

2. The magnetic resonance flowmeter probe structure according to claim 1, characterized in that, The sealing disc (12) has a first alignment groove (121) on its outer wall.

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 cap (2).

4. The magnetic resonance flowmeter probe structure according to claim 1, characterized in that, It also includes a first connector (5), the sealing disc (12) is provided with a first connection hole (122), the probe end cap (2) is provided with a second connection hole (24), the first connector (5) passes through the first connection hole (122) and the second connection hole (24) to connect the sealing disc (12) and the probe end cap (2).

5. 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 conduit fixing plate (3).

6. The magnetic resonance flowmeter probe structure according to claim 1, characterized in that, It also includes a second connector (7), a third connection hole (26) is provided on the probe end cap (2), and a fourth connection hole (35) is provided on the conduit fixing plate (3). The second connector (7) passes through the third connection hole (26) and the fourth connection hole (35) to connect the probe end cap (2) and the conduit fixing plate (3).

7. The magnetic resonance flowmeter probe structure according to any one of claims 1-6, characterized in that, It also includes an outer casing (8), the magnet assembly (1) is disposed in the outer casing (8), and the probe end cap (2) is connected to the end of the outer casing (8).

8. The magnetic resonance flowmeter probe structure according to claim 7, characterized in that, The outer shell (8) is provided with a connecting flange (81) at its end. The limiting ring (22) extends into the outer shell (8). The connecting flange (81) is connected to the probe end cap (2).

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