Plug-in electromagnetic flow sensor

Abstract

The utility model discloses a plug-in type electromagnetic flow sensor, and relates to the field of flow detection, the plug-in type electromagnetic flow sensor comprises a connecting shell, the top of the connecting shell is inwards provided with a middle through hole, and the bottom of the connecting shell is inwards provided with a lower through hole communicated with the middle through hole; a U-shaped magnetic core body is inserted in the lower through opening, a magnetic core protruding block is arranged in the middle of the magnetic core body, a sealing plate designed in an inclined chamfering mode is arranged at the bottom of the connecting shell, the outer surface of the sealing plate is connected with the bottom of the connecting shell in a sealing mode to form an integral sealing cover, and a necking opening is formed in the position, located on the sealing plate, of the connecting shell in an inwards-extruding mode. An electrode connector connected with the outside is arranged in the sealing plate, the electrode connector and a wire connected with the outside form an integral sealing cover, the integral sealing cover is located at the bottom of the connecting shell, the integral sealing cover is fixed through a necking process, and the connecting shell is sealed. The overall occupied space is small, installation of a small-caliber pipeline is facilitated, meanwhile, the overall sealing performance of the sensor is improved, permeation is prevented, and the accuracy of detection data is improved.

Description

Technical Field

[0001] The present application relates to the field of flow detection, and in particular to an insertable electromagnetic flow sensor. Background Art

[0002] A flow sensor is a device used to measure fluid flow. It accurately measures flow by sensing the fluid's flow state and converting it into a measurable signal (such as an electrical signal). The magnet in a flow sensor is used to connect to external devices or systems, a key component in signal transmission and reception. Typically, one end of the sensor's magnet is connected to a detection device, while the other end contacts an electrical circuit or conductive fluid, feeding current flow data back to the detection device. This results in a complex internal structure for the flow sensor.

[0003] For example, the patent application number CN201820367922.X, electromagnetic flowmeter, has the following deficiencies:

[0004] The device contacts the external fluid through the flow detection ends on both sides of the shell, and cooperates with the internal cable to connect the plug end to the through hole to transmit flow data. However, its size is too large and the detection end is too long, which makes it difficult to install in corresponding small-diameter pipes. Moreover, as the detection time increases, the electrode part in contact with the fluid is prone to loosening, causing the fluid to penetrate into the sensor and form accumulation. Utility Model Content

[0005] In order to improve the problem that the detection end process of the commonly used flow sensor makes installation difficult for small-diameter pipes and the poor sealing easily leads to fluid penetration, the present application provides an insertion electromagnetic flow sensor.

[0006] The present application provides an insertion-type electromagnetic flow sensor that adopts the following technical solution:

[0007] An insertion-type electromagnetic flow sensor comprises a connecting shell, wherein a middle opening is formed inwardly at the top of the connecting shell, and a lower opening is formed inwardly at the bottom of the connecting shell and communicates with the middle opening;

[0008] A magnetic core body is inserted into the lower through-hole, and the magnetic core body is U-shaped as a whole. A magnetic core protrusion is provided in the middle of the magnetic core body, and a plurality of coils are arranged around the middle surface of the magnetic core body. A sealing plate is provided at the bottom of the connecting shell, and a chamfer is provided at the bottom of the sealing plate for facilitating shrinkage. The outer surface of the sealing plate is sealed and connected to the bottom of the connecting shell to form an integral cover. The connecting shell is located at the position of the sealing plate and is extruded inward to form a shrinkage. An electrode connector connected to the outside is provided in the sealing plate, and two electrode connectors and the wires connected to the outside form an integral cover. The integral cover is located at the bottom of the connecting shell, and the integral cover is fixed and the connecting shell is sealed by a shrinkage process.

[0009] By adopting the above technical solution, the current passes through the coil to generate a magnetic field, and the fluid cuts the magnetic lines of force to generate an induced electromotive force. The electrode connector transmits the potential signal to an external receiver to obtain the detection result, simplifying the internal structure and occupied space, making installation easier. At the same time, the sealing plate is sealed and connected to the bottom of the connecting shell, and the bottom of the connecting shell is fixed with a shrinking process to improve the sealing inside the sensor and prevent the fluid from penetrating into the connecting shell.

[0010] Preferably, side grooves for docking with the detection device end are provided on both sides of the top of the connecting shell, a snap-fitting protrusion is provided at one end of the outer surface of the connecting shell away from the side groove, and a fixing nut is provided on the surface of the connecting shell at the top of the snap-fitting protrusion.

[0011] By adopting the above technical solution, the middle opening connects the top of the connecting shell and the lower opening, and the connecting shell and the detection device are plugged and fixed, and the fixing nut is threadedly connected to the mounting end, which makes it easy to disassemble the sensor from the detection device, and the snap-on protrusion limits the fixing nut.

[0012] Preferably, a plurality of positioning holes are provided on the top of the connecting shell surrounding the central opening.

[0013] By adopting the above technical solution, the multiple positioning holes are docked with the plug-in end of the detection device to perform positioning.

[0014] Preferably, an installation groove is formed on the outer surface of the connecting shell around the top of the clamping protrusion.

[0015] By adopting the above technical solution, a rubber ring is bonded in the installation groove to maintain the sealing when the connection shell is connected to the outside.

[0016] Preferably, a plurality of side concave surfaces are formed inwardly on both sides of the outer surface of the magnetic core body, and the inner walls of the plurality of side concave surfaces are fixedly connected to the plurality of coils one by one.

[0017] By adopting the above technical solution, the coil is connected in a surrounding manner within the side concave surface, thereby forming an integral connection between the coil and the magnetic core body.

[0018] Preferably, a limiting groove is provided inwardly at the bottom of the fixing nut, and the limiting groove abuts against the surface of the clamping protrusion.

[0019] By adopting the above technical solution, the limiting groove abuts against the clamping protrusion, so that the fixing nut is integrally inserted into the surface of the connecting shell to be fixed, and at the same time the connecting shell forms a lateral limit for the fixing nut.

[0020] Preferably, the top of the inner surface of the fixing nut is set as a threaded surface, and the bottom of the inner surface of the fixing nut is set as a smooth surface, and the smooth surface abuts against the top surface of the connecting shell.

[0021] By adopting the above technical solution, the smooth surface is movably abutted against the connecting shell. When the fixing nut is connected to the surface of the connecting shell, the smooth surface abuts against the rubber ring in the installation groove to maintain sealing. At the same time, the threaded surface is threadedly connected to the external structure, thereby forming an integral fixed connection between the connecting shell and the detection device.

[0022] Preferably, a sealing groove is formed around the lower opening at the bottom of the connecting shell, and the inner wall of the sealing groove is sealed to the sealing plate.

[0023] By adopting the above technical solution, after the sealing plate is inserted into the sealing groove, the sealing groove is subjected to a shrinking process, thereby sealing the entire connection shell.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The electrode connector is used to contact the fluid in the pipeline to measure data. With the current flowing to the magnetic core body, the coil generates a magnetic field, causing the fluid to cut the magnetic lines of force to generate an electromotive force, and the electromotive force signal is transmitted from the top of the connecting shell to the outside to obtain detection data. The structure is simple, and the connecting end at the bottom of the connecting shell is shorter, which is convenient for installation of small-diameter pipelines. At the same time, the overall space is small. The bottom of the connecting shell is processed by a shrinking process to improve the overall sealing of the sensor and effectively prevent fluid penetration.

[0026] 2. By sensing the electromotive force signal through the magnetic field, the internal structure of the connection shell is kept in a static state, thereby preventing measurement errors caused by component wear or failure, and improving the reliability and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a three-dimensional schematic diagram of this application;

[0028] Figure 2 This is a cross-sectional view of the interior of this application;

[0029] Figure 3 This is the exploded diagram of the structure of this application;

[0030] Figure 4 This is a side cross-sectional view of the fixing nut for this application;

[0031] Figure 5 This is a side sectional connection diagram of the magnetic core body of this application.

[0032] Reference numerals: 1, connecting housing; 2, snap-fitting protrusion; 3, mounting groove; 4, middle opening; 5, lower opening; 6, sealing groove; 7, side groove; 8, positioning hole; 9, fixing nut; 10, limiting groove;

[0033] 11. Magnetic core body; 12. Concave side surface; 13. Magnetic core protrusion; 14. Sealing plate; 15. Threaded surface; 16. Smooth surface; 17. Coil; 18. Electrode connector. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-Figure 5 This application is described in further detail.

[0035] The embodiment of the present application discloses an insertion-type electromagnetic flow sensor.

[0036] Reference Figure 1 、 Figure 3 、 Figure 4 A plug-in electromagnetic flow sensor includes a connecting shell 1, which is cylindrical as a whole, and a circular middle opening 4 is opened inwardly in the middle of the upper end surface of the connecting shell 1, and a circular lower opening 5 is opened inwardly in the middle of the lower end surface of the connecting shell 1, and the lower opening 5 passes through the connecting shell 1 and is connected with the middle opening 4. The upper end surface of the connecting shell 1 is located on both sides of the opening of the middle opening 4 and has side grooves 7 downwardly opened. The portion of the upper end surface of the connecting shell 1 outside the two side grooves 7 is provided with multiple positioning holes 8 (the number of positioning holes 8 is at least six) around the middle opening 4.

[0037] The sealing plate 14 is provided with an electrode connector 18 connected to an external wire, and the electrode connector 18 and the external wire form an integral cover.

[0038] It should be noted that a detection device for detecting flow is aligned at the top of the connecting shell 1, and a circuit docking port and a docking positioning port are provided at the interface at the bottom of the detection device. The circuit docking port is plugged into the two side grooves 7, and the docking positioning port is plugged into the positioning hole 8.

[0039] The middle opening 4 is a reserved space for the docking of the detection device interface. At the same time, a current conduction device is provided in the lower opening 5. The lower opening 5 is connected to the middle opening 4 so that the current conduction device is docked with the detection device, thereby detecting the current flow. At the same time, the two side grooves 7 and the multiple positioning holes 8 are respectively docked with the positioning ports of the detection device, thereby assisting in the calibration of the docking between the connecting shell 1 and the detection device to prevent offset and misalignment.

[0040] Reference Figure 2 、 Figure 3 、 Figure 5The outer surface of the magnetic core body 11 is U-shaped, and the outer surfaces of both sides of the magnetic core body 11 are inwardly concave and provided with side concave surfaces 12. The coil 17 is fixed around the side concave surfaces 12. At the same time, the middle part of the magnetic core body 11 is provided with a magnetic core protrusion 13. The lower end surface of the connecting shell 1 is located at the position of the lower through-hole 5 and is surrounded by a sealing groove 6. Under normal circumstances, a sealing plate 14 is movably inserted in the sealing groove 6. The bottom of the sealing plate 14 is inwardly retracted and provided with an oblique chamfer, which is convenient for insertion and shrinking processing. The sealing plate 14 is made of plastic material, and after the sealing plate 14 is installed in the sealing groove 6, the outer surface of the connecting shell 1 is located at the position of the sealing groove 6 and the overall cover is fixed by the shrinking process, thereby improving the sealing performance of the sealing plate 14 and the connecting shell 1 as a whole. A through groove is provided in the middle of the sealing plate 14, and the inner wall of the through groove is plugged into the bottom of the magnetic core protrusion 13.

[0041] It should be noted that there are at least four side concave surfaces 12, and through holes are provided on the upper surface of the sealing plate 14 on both sides of the U-shape of the magnetic core body 11. The through holes pass through the bottom of the sealing plate 14, and the inner walls of the two through holes are fixed with electrode connectors 18. The electrode connectors 18 are connected to the external wires to form an overall cover. When the sealing plate 14 is inserted into the sealing groove 6, it cooperates with the overall cover treatment of the connecting shell 1 to effectively prevent contaminants in the fluid from accumulating inside the connecting shell 1. At the same time, the outer surface of the connecting shell 1 is squeezed at the position of the sealing groove 6 to form a shrinkage inward, so that the sealing groove 6 and the connecting shell are fixed as a whole, thereby improving the sealing performance and the sealing plate 14.

[0042] The bottom of the magnetic core protrusion 13 is inserted into the groove in the middle of the sealing plate 14, and is fixed as a whole with the connection between the sealing plate 14 and the connecting shell 1. When the bottom of the magnetic core protrusion 13 is fixed to the sealing plate 14, the U-shaped protrusions on both sides of the magnetic core body 11 are driven to abut against the two through holes of the sealing plate 14, so that the butt end of the electrode connector 18 is connected to the magnetic core body 11, and the bottom of the connecting shell 1 is inserted into the fluid, thereby driving the electrode connector 18 to contact the fluid, and the electrode connector 18 and the externally connected wire synchronously form an overall cover, cooperating with the coil 17 to generate a magnetic field, so that the electrode connector 18 induces an electromotive force and transmits the electromotive force to an external receiving mechanism.

[0043] Reference Figure 2 、 Figure 3 、 Figure 4A fixing nut 9 is movably inserted into the top of the connecting shell 1. The fixing nut 9 is annular as a whole, and the top of the inner surface of the fixing nut 9 is set to a threaded surface 15. The threaded surface 15 is fixed to the interface thread of the detection device, and the inner surface of the fixing nut 9 is located at the bottom of the threaded surface 15. A smooth surface 16 is provided. Under normal circumstances, the smooth surface 16 is movably inserted into the surface of the connecting shell 1. At the same time, a circle of clamping protrusions 2 is fixed around the middle of the outer surface of the connecting shell 1, and an installation groove 3 is provided inwardly around the bottom of the clamping protrusion 2 on the outer surface of the connecting shell 1. A limiting groove 10 is provided on the bottom surface of the fixing nut 9 at the position of the clamping protrusion 2, and the limiting groove 10 is consistent with the width of the clamping protrusion 2 and is movably inserted.

[0044] It should be noted that a rubber ring is adhered and fixed to the joint between the core body 11 and the inner wall of the lower opening 5 and the groove of the installation groove 3, so as to maintain a seal when the top of the connection shell 1 is connected to the interface of the external device.

[0045] The threaded surface 15 is threadedly connected to the outer surface of the docking interface of the detection device, and the smooth surface 16 is movably plugged into the outer surface of the connecting shell 1, and is fixed to the rubber ring in the mounting groove 3, so that the fixing nut 9 forms a longitudinal fixation on the connecting shell 1, so that the connecting shell 1 and the detection device are always in a center-aligned state, and the quota and the top of the connecting shell 1 are inserted into the interior of the detection device by the docking interface of the detection device to form a blockage, thereby forming an integral connection between the connecting shell 1 and the detection device, and it is easy to disassemble by direct plugging and unplugging. At the same time, the snap-in protrusion 2 supports the bottom of the fixing nut 9 to prevent the fixing nut 9 from slipping from the bottom of the connecting shell 1, thereby playing a limiting role.

[0046] The implementation principle of an insertable electromagnetic flow sensor in an embodiment of the present application is as follows: when using this device, first insert the connecting shell 1 as a whole upward into the interface of the detection device, and ensure that the detection end of the detection device is inserted into the middle opening 4 and abuts against the top of the magnetic core body 11. The positioning interface of the detection device is limited by two side grooves 7 and the positioning hole 8 respectively, so as to prevent poor contact caused by the deviation of the plug-in direction of the connecting shell 1.

[0047] When the top of the connecting shell 1 is fully inserted into the detection device, the bottom of the connecting shell 1 is located in the fluid, and the personnel rotate the fixing nut 9 to connect the threaded surface 15 with the interface thread at the bottom of the detection device, which helps to limit the longitudinal position of the connecting shell 1 while sealing the connection between the connecting shell 1 and the detection device to effectively prevent impurities from being adsorbed. Then the personnel insert the sealing plate 14 from the inner wall of the sealing groove 6, and squeeze the bottom of the outer surface of the connecting shell 1 from the position of the sealing groove 6. The shrinking process is used to form an overall package on the bottom of the connecting shell 1 to form a sealed connection, and the magnetic core protrusion 13 is plugged into the groove of the sealing plate 14, so that the magnetic core protrusion 13 is fixed as a whole in the lower through-port 5. As the electrode connector 18 continues to contact the conductive liquid or the circuit end, the fluid is cut by the magnetic flux line movement to generate an electromotive force, which cooperates with the magnetic field generated by the coil 17 surrounding the magnetic core body 11, and finally transmits the electromotive force signal from the bottom to the top to the detection end.

[0048] At the same time, the core protrusion 13 is located in the middle of the core body 11, so that there is a certain space between the U-shaped ends of the core body 11 and the core protrusion 13, which affects the distribution of the magnetic field and increases the coupling area between the coil 17 and the core body 11, thereby increasing the inductance value or improving the inductance performance.

[0049] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An insertion-type electromagnetic flow sensor, characterized in that: It comprises a connecting shell (1), wherein a middle opening (4) is provided inwardly at the top of the connecting shell (1), and a lower opening (5) communicating with the middle opening (4) is provided inwardly at the bottom of the connecting shell (1); A magnetic core body (11) is inserted into the lower opening (5), and the magnetic core body (11) is U-shaped as a whole. A magnetic core protrusion (13) is provided in the middle of the magnetic core body (11), and a plurality of coils (17) are arranged around the surface of the middle of the magnetic core body (11). The bottom of the connecting shell (1) is sealed with a sealing plate (14), and the bottom of the sealing plate (14) is provided with an oblique chamfer for facilitating shrinkage. The outer surface of the sealing plate (14) is sealed with the bottom of the connecting shell (1) to form an integral cover. The bottom of the connecting shell (1) is located at the position where the sealing plate (14) is connected and is fixed and sealed by shrinkage. An electrode connector (18) connected to an external wire is provided in the sealing plate (14), and the electrode connector (18) and the external wire form an integral cover.

2. The insertion type electromagnetic flow sensor according to claim 1, characterized in that: Side grooves (7) for docking with the detection device end are provided on both sides of the top of the connection shell (1); a snap-fitting protrusion (2) is provided on the end of the outer surface of the connection shell (1) away from the side groove (7); and a fixing nut (9) is provided on the surface of the connection shell (1) at the top of the snap-fitting protrusion (2).

3. The insertion type electromagnetic flow sensor according to claim 2, characterized in that: The top of the connection shell (1) is provided with a plurality of positioning holes (8) surrounding the central opening (4).

4. The insertion type electromagnetic flow sensor according to claim 1, characterized in that: The outer surface of the connecting shell (1) is provided with a mounting groove (3) around the top of the clamping protrusion (2).

5. The insertion type electromagnetic flow sensor according to claim 1, characterized in that: Multiple side concave surfaces (12) are provided inwardly on both sides of the outer surface of the magnetic core body (11), and the inner walls of the multiple side concave surfaces (12) are fixedly connected to the multiple coils (17) one by one.

6. The insertion type electromagnetic flow sensor according to claim 2, characterized in that: A limiting groove (10) is provided inwardly at the bottom of the fixing nut (9), and the channel of the limiting groove (10) abuts against the surface of the clamping protrusion (2).

7. The insertion type electromagnetic flow sensor according to claim 6, characterized in that: The top of the inner surface of the fixing nut (9) is set as a threaded surface (15), and the bottom of the inner surface of the fixing nut (9) is set as a smooth surface (16), and the smooth surface (16) abuts against the top surface of the connecting shell (1).

8. The insertion type electromagnetic flow sensor according to claim 1, characterized in that: A sealing groove (6) is provided at the bottom of the connection housing (1) around the lower opening (5), and the inner wall of the sealing groove (6) is sealedly connected to the sealing plate (14).

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