Magnetic resonance flowmeter magnet assembly

Abstract

The invention belongs to the technical field of fluid metering, and discloses a magnetic resonance flowmeter magnet assembly which comprises a magnet disc, a connecting bolt, a plugging disc and a fixing rod, the magnet disc comprises a supporting disc and a plurality of permanent magnet blocks, and a magnet avoiding through hole, a mounting groove, a connecting hole, a threaded hole and a serial mounting hole are formed in the disc face of one side of the supporting disc; the multiple mounting grooves, the multiple connecting holes, the multiple threaded holes and the multiple serial mounting holes are formed in the circumferential direction of the magnet avoiding through hole, a permanent magnet block is mounted in each mounting groove, openings of the mounting grooves of the multiple magnet discs face the same direction and coaxially abut against each other to form a magnet column, and every two adjacent supporting discs are connected through a connecting bolt. The two ends of the magnet column are each provided with a plugging disc, a datum hole is formed in each plugging disc, and the fixing rods penetrate through the datum holes and the serial mounting holes. According to the invention, the supporting discs are connected in pairs through the connecting bolts and are connected in series through the fixing rods, so that the bearing of the permanent magnet blocks is more stable and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of fluid metering, and in particular to a magnetic resonance flowmeter magnet assembly. 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. As a fluid component analysis technology, magnetic resonance (MR) 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 medical high-field MRI (magnetic resonance imaging), which uses superconducting coils to provide the static magnetic field necessary for the nuclear magnetic resonance phenomenon, low-field nuclear magnetic resonance probes use ferromagnetic materials (neodymium iron boron, samarium cobalt, ferrite, etc.) to emit static magnetic fields.

[0003] Hundreds of permanent magnets are arranged on the magnetic resonance flowmeter magnet assembly 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. The existing magnetic resonance flowmeter magnet assembly has unstable bearing capacity on the permanent magnet blocks, which affects the accuracy of the magnetic resonance flowmeter measurement. Summary of the invention

[0004] The object of the present invention is to provide a magnetic resonance flowmeter magnet assembly which can stably and reliably carry a permanent magnet block.

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

[0006] A magnetic resonance flow meter magnet assembly comprising:

[0007] A plurality of magnet disks, the magnet disks comprising a support disk and a plurality of permanent magnet blocks, a disk surface of one side of the support disk is provided with a magnet avoidance through hole, a mounting groove, a connection hole, a threaded hole and a stringing hole, the mounting groove, the connection hole, the threaded hole and the stringing hole are respectively provided in a plurality around the circumference of the magnet avoidance through hole, and one of the permanent magnet blocks is installed in each of the mounting grooves;

[0008] Connecting bolts, the openings of the mounting slots of the plurality of magnetic disks face the same direction and are coaxially abutted to form a magnetic column, two adjacent support disks are connected by the connecting bolts, the connecting bolts are passed through the connecting hole of one support disk, and are screwed to the threaded hole of the other support disk;

[0009] Two blocking disks, one blocking disk is disposed at each end of the magnet column, and a reference hole is disposed on the blocking disk;

[0010] A fixing rod is passed through the reference hole and the stringing hole, and coaxially connects the plurality of magnetic disks and the two blocking disks.

[0011] Preferably, the magnet avoidance through hole is located at the axis of the support disk, and the connection hole, the threaded hole and the stringing hole are equidistant from the axis of the support disk.

[0012] Preferably, one threaded hole and one stringing hole are provided between two adjacent connecting holes.

[0013] Preferably, the distance between the mounting groove and the axis center of the support plate is smaller than the distance between the connecting hole and the axis center of the support plate.

[0014] Preferably, the cross-section of the installation groove is rectangular, and the four corners of the installation groove are respectively connected to an avoidance groove.

[0015] Preferably, an adjustment hole is provided at the bottom of the mounting groove, and the adjustment hole is connected to the other side of the support plate.

[0016] Preferably, the connecting hole is a countersunk hole.

[0017] Preferably, a direction marking groove is provided on the side wall of the support plate.

[0018] Preferably, a blocking avoidance through hole is provided on the blocking disk, and the blocking avoidance through hole is connected to the magnet avoidance through hole.

[0019] Preferably, the diameter of the sealing disk is larger than the diameter of the supporting disk.

[0020] Beneficial effects of the present invention:

[0021] The magnet disk is composed of a support disk and multiple permanent magnet blocks. The support disks are connected in pairs by connecting bolts and are installed in series by fixing rods, so that the permanent magnet blocks are clamped and locked between two adjacent support disks, or between the support disk and the blocking disk, which is more stable and reliable, ensuring the stability of the permanent magnet block load, and thus ensuring the accuracy of the magnetic resonance flowmeter measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded view of a partial structure of a magnetic resonance flowmeter magnet assembly according to an embodiment of the present invention;

[0023] Figure 2 is a partial exploded view of the magnetic disk according to an embodiment of the present invention;

[0024] Figure 3 is a schematic structural diagram of one direction of the support plate according to an embodiment of the present invention;

[0025] Figure 4 is a structural schematic diagram of another direction of the support plate according to an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of a local structure of a support plate according to an embodiment of the present invention;

[0027] Figure 6 It is a schematic structural diagram of one direction of the blocking disk according to an embodiment of the present invention;

[0028] Figure 7 It is a structural schematic diagram of another direction of the blocking disk described in an embodiment of the present invention.

[0029] In the figure:

[0030] 1. Magnetic disk;

[0031] 11. Support plate; 110. Magnet avoidance through hole; 111. Mounting slot; 112. Connection hole; 113. Threaded hole; 114. Serial mounting hole; 115. Avoidance slot; 116. Adjustment hole; 117. Direction marking slot;

[0032] 12. Permanent magnet block;

[0033] 2. Connecting bolts;

[0034] 3. Sealing plate;

[0035] 30. Blocking and avoiding through holes; 31. Reference holes;

[0036] 4. Fixing rod. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0041] like Figure 1-Figure 7 As shown, the present invention provides a magnetic resonance flowmeter magnet assembly, including a magnet disk 1, a connecting bolt 2, a blocking disk 3 and a fixing rod 4. Among them, there are multiple magnet disks 1, and the magnet disk 1 includes a support disk 11 and multiple permanent magnet blocks 12. A magnet avoidance through hole 110, a mounting groove 111, a connecting hole 112, a threaded hole 113 and a stringing hole 114 are arranged on one side of the disk surface of the support disk 11. The mounting groove 111, the connecting hole 112, the threaded hole 113 and the stringing hole 114 are respectively arranged around the circumference of the magnet avoidance through hole 110. A permanent magnet block 12 is installed in each mounting groove 111. The mounting grooves 111 of the multiple magnet disks 1 are arranged on the same side of the disk surface. 1 have the same opening direction and are coaxially abutted to form a magnet column. Two adjacent support disks 11 are connected by a connecting bolt 2. The connecting bolt 2 is penetrated in a connecting hole 112 of one support disk 11 and is screwed to a threaded hole 113 of the other support disk 11. Two blocking disks 3 are provided. A blocking disk 3 is respectively provided at both ends of the magnet column. A reference hole 31 is provided on the blocking disk 3. A fixing rod 4 is penetrated in the reference hole 31 and the stringing hole 114 to realize coaxial connection of multiple magnet disks 1 and two blocking disks 3.

[0042] In the present invention, the magnet disk 1 is composed of a support disk 11 and a plurality of permanent magnet blocks 12. The support disks 11 are connected in pairs by connecting bolts 2 and are serially mounted by fixing rods 4, so that the permanent magnet blocks 12 are clamped and locked between two adjacent support disks 11, or between the support disk 11 and the blocking disk 3, which is more stable and reliable, thereby ensuring the stability of the bearing of the permanent magnet blocks 12, and further ensuring the accuracy of the measurement of the magnetic resonance flowmeter.

[0043] Specifically, the magnet avoidance through hole 110 is located at the axis of the support disk 11, and the connection hole 112, the threaded hole 113 and the stringing hole 114 are equidistant from the axis of the support disk 11. The above arrangement makes the locking force on the multiple permanent magnet blocks 12 on the support disk 11 more balanced, further ensuring the stability of the bearing of the permanent magnet blocks 12.

[0044] More specifically, a threaded hole 113 and a stringing hole 114 are provided between two adjacent connection holes 112 in the circumferential direction of the support plate 11. The above arrangement makes the locking position of the connection bolt 2 and the serial connection position of the fixing rod 4 more balanced.

[0045] Specifically, the distance between the mounting groove 111 and the axis of the support plate 11 is smaller than the distance between the connecting hole 112 and the axis of the support plate 11. The above arrangement enables the permanent magnet block 12 to be located inside the circumferentially arranged connecting bolts 2 and fixing rods 4, which is safer and more reliable, and reduces magnetic interference to the outside of the support plate 11.

[0046] More specifically, the cross section of the installation groove 111 is rectangular, and the four corners of the installation groove 111 are connected to a relief groove 115, the depth of the relief groove 115 is equal to the depth of the installation groove 111, and is a chamfer reserved for processing.

[0047] More specifically, the bottom of the installation slot 111 is provided with an adjustment hole 116, and the adjustment hole 116 is connected to the other side of the support plate 11. By providing the adjustment hole 116, it is convenient to disassemble and install the permanent magnet block 12 in the installation slot 111.

[0048] In this embodiment, the structure of the permanent magnet block 12 is adapted to the mounting groove 111 and is a square block. There are 24 mounting grooves 111, which are evenly distributed around the axis of the support plate 11. Taking the radial direction of the support plate 11 as a reference, the azimuth angles of two adjacent mounting grooves 111 differ by 15°.

[0049] Specifically, the connection hole 112 is a countersunk hole, so that the head of the connection bolt 2 can be accommodated in the connection hole 112 , thereby making the two adjacent support plates 11 more closely attached, further improving the bearing stability of the permanent magnet block 12 .

[0050] In this embodiment, a direction marking groove 117 is provided on the side wall of the support disk 11, so that the magnetic disks 1 can be aligned in orientation when assembled and abutted against each other.

[0051] Specifically, the blocking plate 3 is provided with a blocking avoidance through hole 30, which is connected to the magnet avoidance through hole 110. The connected blocking avoidance through hole 30 and the magnet avoidance through hole 110 can be used for the antenna tube and the fluid tube to pass through.

[0052] In this embodiment, the blocking avoidance through hole 30 is located at the axial center of the blocking disk 3 , and the diameters of the blocking avoidance through hole 30 and the magnet avoidance through hole 110 are equal.

[0053] Specifically, the diameter of the blocking disk 3 is greater than the diameter of the supporting disk 11 , so that the magnet disk 1 can be protected more reliably.

[0054] 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 magnetic resonance flowmeter magnet assembly, characterized in that: include: A plurality of magnet disks (1), the magnet disks (1) comprising a support disk (11) and a plurality of permanent magnet blocks (12); a disk surface of one side of the support disk (11) is provided with a magnet avoidance through hole (110), a mounting groove (111), a connection hole (112), a threaded hole (113) and a stringing hole (114); a plurality of the mounting grooves (111), the connection holes (112), the threaded holes (113) and the stringing holes (114) are respectively provided around the circumference of the magnet avoidance through hole (110); and one of the permanent magnet blocks (12) is installed in each of the mounting grooves (111); A connecting bolt (2), the openings of the mounting grooves (111) of the plurality of magnetic disks (1) are oriented in the same direction and are coaxially abutted to form a magnetic column, two adjacent support disks (11) are connected via the connecting bolt (2), the connecting bolt (2) is passed through the connecting hole (112) of one support disk (11) and is screwed to the threaded hole (113) of another support disk (11); Two blocking disks (3), one blocking disk (3) being provided at each end of the magnet column, and a reference hole (31) being provided on the blocking disk (3); A fixing rod (4), wherein the fixing rod (4) is inserted into the reference hole (31) and the stringing hole (114), and coaxially connects the plurality of magnetic disks (1) and the two blocking disks (3).

2. The magnetic resonance flowmeter magnet assembly according to claim 1, characterized in that: The magnet avoidance through hole (110) is located at the axis of the support disk (11), and the connection hole (112), the threaded hole (113) and the serial mounting hole (114) are equidistant from the axis of the support disk (11).

3. The magnetic resonance flowmeter magnet assembly according to claim 2, characterized in that: A threaded hole (113) and a stringing hole (114) are provided between two adjacent connection holes (112).

4. The magnetic resonance flowmeter magnet assembly according to claim 3, characterized in that: The distance between the mounting groove (111) and the axis of the support plate (11) is smaller than the distance between the connecting hole (112) and the axis of the support plate (11).

5. The magnetic resonance flowmeter magnet assembly according to claim 1, characterized in that: The cross section of the installation groove (111) is rectangular, and the four corners of the installation groove (111) are respectively connected to an avoidance groove (115).

6. The magnetic resonance flowmeter magnet assembly according to claim 1, characterized in that: The bottom of the installation groove (111) is provided with an adjustment hole (116), and the adjustment hole (116) is connected to the other side of the support plate (11).

7. The magnetic resonance flowmeter magnet assembly according to claim 1, characterized in that: The connecting hole (112) is a countersunk hole.

8. The magnetic resonance flowmeter magnet assembly according to claim 1, characterized in that: A direction marking groove (117) is provided on the side wall of the support plate (11).

9. The magnetic resonance flowmeter magnet assembly according to claim 1, characterized in that: The blocking disk (3) is provided with a blocking avoidance through hole (30), and the blocking avoidance through hole (30) is connected to the magnet avoidance through hole (110).

10. The magnetic resonance flowmeter magnet assembly according to any one of claims 1 to 9, characterized in that: The diameter of the blocking disk (3) is greater than the diameter of the supporting disk (11).

Images