An electromagnetic flowmeter

Abstract

The present invention discloses an electromagnetic flowmeter, which relates to the technical field of electromagnetic flowmeters. The electromagnetic flowmeter comprises a flow tube, wherein a first connecting sleeve is fixed to the outside of one end of the flow tube, a sliding tube is sleeved on the middle of the flow tube, a flow detection assembly is installed on the outside of the sliding tube, a servo motor is installed in the installation groove, and a lead screw is installed at the output end of the servo motor. By arranging the servo motor, the lead screw can be driven to rotate forward or reverse under the cooperation of the reciprocating operation of the servo motor, and the sliding tube can be driven to slide along the flow tube. During the sliding process of the sliding tube, the flow detection assembly follows the movement. During the movement of the flow detection assembly, the positions of the N-pole magnet and the S-pole magnet are rotated, which can avoid the continuous adsorption of ferrous substances, effectively avoid the adsorption of ferrous impurities, ensure the penetration of the electromagnetic meter, ensure the accuracy of the test results, and avoid the accumulation and blockage of impurities, so as to perform continuous and effective detection.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic flowmeters, and in particular to an electromagnetic flowmeter. Background Art

[0002] Electromagnetic flowmeter is a new type of flow measurement instrument that has developed rapidly with the development of electronic technology. It is an instrument that uses the principle of electromagnetic induction to measure the flow rate of conductive fluid based on the electromotive force induced when the conductive fluid passes through an external magnetic field.

[0003] For example, announcement number: CN110274640B The present invention discloses an electromagnetic flowmeter, which adopts a structure that can correctly perform flow measurement and sealing inspection while preventing damage to the measuring tube, and comprises: a measuring tube; a housing; a through hole for inserting the end of the measuring tube; and a joint having a first flat surface (flat surface) opposite to the top end surface of the measuring tube. It comprises: an O-ring (sealing component) that is arranged between the outer peripheral surface (outer surface) of the measuring tube and the hole wall surface of the first hole; and an annular elastic component that is arranged between the top end surface of the measuring tube and the first flat surface. The elastic component forms a pressure-conducting path connecting the internal space and the space between the top end surface of the measuring tube and the first flat surface, and the internal space is for fluid to flow, and the space is defined by the outer peripheral surface of the measuring tube, the hole wall surface of the first hole, the first flat surface and the O-ring;

[0004] Based on the search of the above patents and in combination with the equipment in the prior art, it was found that when measuring the flow of fluid containing iron substances, the magnetic field is formed between the magnets when the flow passes through, which easily leads to the adsorption of iron-containing substances on the pipe wall. During the long detection process, the accumulation of iron-containing substances will cause blockage of the pipeline, while reducing the flow rate of the medium and affecting the detection results. For this reason, an electromagnetic flowmeter is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide an electromagnetic flowmeter to solve the following technical problems: when measuring the flow of a fluid containing iron, when the flow passes through, the magnetic field is formed between the magnets, which easily causes the iron-containing substances to be adsorbed on the pipe wall. During the long detection process, the accumulation of iron-containing substances will cause blockage of the pipeline, while reducing the flow rate of the medium and affecting the detection results.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] An electromagnetic flowmeter comprises a flow tube, wherein a first connecting sleeve is fixed to the outside of one end of the flow tube, a sliding tube is sleeved on the middle part of the flow tube, and a flow detection assembly is installed on the outside of the sliding tube;

[0008] A rod hole is provided on the end surface of the first connecting sleeve, and the flow detection assembly includes a fixed frame, a guide rod is fixed on the side of the fixed frame, one end of the guide rod is inserted into the rod hole, and a fixing plate is fixed on the outer circumferential surface of the sliding tube. A mounting groove is provided on the circumferential surface of the first connecting sleeve, a servo motor is installed in the mounting groove, and a screw rod is installed at the output end of the servo motor, a screw hole is provided in the fixing plate, and one end of the screw rod passes through the screw hole in the fixing plate.

[0009] As a further solution of the present invention: an N-pole magnet and an S-pole magnet are respectively fixed to the outer side of the circumferential surface of the sliding tube, and the N-pole magnet and the S-pole magnet are arranged opposite to each other. Two electrodes are fixed to the outer side of the circumferential surface of the sliding tube, and the two electrodes are arranged opposite to each other. The connection orientation of the electrodes is perpendicular to the connection orientation of the N-pole magnet and the S-pole magnet.

[0010] As a further solution of the present invention: a fixed frame is fixed on the outside of the sliding tube, a converter is installed on the fixed frame, a fixed rod is installed on the converter, a display meter is assembled on the fixed rod, the electrode is connected to the converter through a signal line, and the converter is connected to the display meter through a signal line.

[0011] As a further solution of the present invention: a mounting frame is fixed on the outside of the sliding tube, and the mounting frame covers the outside of the N-pole magnet and the S-pole magnet, and can cooperate to realize the detection of flow rate.

[0012] As a further solution of the present invention: one end of the sliding tube is connected and fixed with a second connecting sleeve, and the end of the second connecting sleeve is installed with an assembly joint component, which can more accurately achieve the docking of the pipeline and the flow meter.

[0013] As a further solution of the present invention: the assembly joint component includes a fixing ring, a conical head is fixed on the fixing ring, and a rubber pad is sleeved on the outer side of the conical head.

[0014] As a further solution of the present invention: the circumferential wall of the fixed ring is provided with notches in a ring array, and a swing ring is installed in the notch through a pin shaft for rotation. A screw is fixed on the swing ring, and a rubber ring is mounted on the screw. A locking nut is rotatably assembled on the screw, which can cooperate to achieve flange connection of the medium pipeline.

[0015] As a further solution of the present invention: the fixing ring is connected to the second connecting sleeve, and the second connecting sleeve is arranged on the outside of the flow tube.

[0016] As a further solution of the present invention: a battery box is embedded in the first connecting sleeve, a storage battery is installed in the battery box, the storage battery is connected to the mounting slot, and a control circuit board is provided on the connecting circuit, which can be used to control the rotation duration and rotation direction of the mounting slot.

[0017] Beneficial effects of the present invention:

[0018] By setting a servo motor, the reciprocating operation of the servo motor can drive the screw to rotate forward or reverse, and can drive the sliding tube to slide along the flow tube. During the sliding process of the sliding tube, the flow detection component follows the movement. During the movement of the flow detection component, the positions of the N-pole magnet and the S-pole magnet are rotated, which can avoid the continuous adsorption of ferrous substances, effectively avoid the adsorption of ferrous impurities, ensure the penetration of the electromagnetic meter, ensure the accuracy of the test results, and avoid the accumulation and blockage of impurities, so as to enable continuous and effective detection.

[0019] By docking the medium pipe on the conical head, arranging a rubber pad on the conical head, and setting the conical head to a conical structure, docking can be faster. After docking, the connection of the medium pipe can be better guaranteed, and the flange installation of the medium pipe can be achieved. The connection effect, splicing accuracy and sealing can be guaranteed, and a more stable connection effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall first three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall second three-dimensional structure of the present invention;

[0023] Figure 3 It is a three-dimensional schematic diagram of the overall propulsion structure of the present invention;

[0024] Figure 4 This is a schematic structural diagram of the flow detection component of the present invention from a first perspective;

[0025] Figure 5 This is a schematic structural diagram of the flow detection component of the present invention from a second perspective;

[0026] Figure 6 is a structural diagram of an assembly joint component of the present invention;

[0027] In the figure: 1. flow tube; 2. first connecting sleeve; 3. battery box; 4. mounting slot; 5. sliding tube; 6. flow detection assembly; 7. second connecting sleeve; 8. assembly joint assembly; 9. servo motor; 10. screw rod; 11. guide rod; 12. fixing plate; 61. fixing frame; 62. converter; 63. fixing rod; 64. display meter; 65. N-pole magnet; 66. S-pole magnet; 67. mounting frame; 68. electrode; 81. fixing ring; 82. swing ring; 83. screw rod; 84. rubber ring; 85. locking nut; 86. conical head; 87. rubber pad. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] Example 1

[0030] See also Figure 1-5 As shown, the present invention is an electromagnetic flowmeter, comprising a flow tube 1, a first connecting sleeve 2 being fixed to the outside of one end of the flow tube 1, a sliding tube 5 being sleeved on the middle of the flow tube 1, and a flow detection assembly 6 being installed on the outside of the sliding tube 5;

[0031] A rod hole is provided on the end face of the first connecting sleeve 2, and the flow detection assembly 6 includes a fixed frame 61. A guide rod 11 is fixed to the side of the fixed frame 61, and one end of the guide rod 11 is inserted into the rod hole. A fixing plate 12 is fixed to the outer circumferential surface of the sliding tube 5. A mounting groove 4 is provided on the circumferential surface of the first connecting sleeve 2, and a servo motor 9 is installed in the mounting groove 4. A screw rod 10 is installed at the output end of the servo motor 9, and a screw hole is provided in the fixing plate 12. One end of the screw rod 10 passes through the screw hole in the fixing plate 12.

[0032] An N-pole magnet 65 and an S-pole magnet 66 are fixed to the outer side of the circumference of the sliding tube 5, respectively. The N-pole magnet 65 and the S-pole magnet 66 are arranged in opposition to each other. Two electrodes 68 are fixed to the outer side of the circumference of the sliding tube 5, and the two electrodes 68 are arranged in opposition. The connection position of the electrodes 68 is perpendicular to the connection position of the N-pole magnet 65 and the S-pole magnet 66. A mounting frame 67 is fixed to the outer side of the sliding tube 5. A converter 62 is mounted on the mounting frame 67. A fixing rod 63 is mounted on the converter 62. A display meter 64 is mounted on the fixing rod 63. The electrodes 68 are connected to the converter 62 by signal lines, and the converter 62 is connected to the display meter 64 by signal lines. A fixing frame 61 is fixed to the outer side of the sliding tube 5. The fixing frame 61 covers the outer sides of the N-pole magnet 65 and the S-pole magnet 66. A second connecting sleeve 7 is connected and fixed to one end of the sliding tube 5, and an assembly joint assembly 8 is mounted on the end of the second connecting sleeve 7. The first connecting sleeve 2 is embedded with a battery box 3, and the battery box 3 is equipped with a storage battery. The storage battery is connected to the mounting slot 4, and a control circuit board is provided on the connecting circuit to control the rotation time and direction of the mounting slot 4;

[0033] When working, the electromagnetic flowmeter is a new type of flow measurement instrument that has developed rapidly with the development of electronic technology. The electromagnetic flowmeter is an instrument that uses the principle of electromagnetic induction to measure the flow of conductive fluid based on the electromotive force induced when the conductive fluid passes through an external magnetic field. When the flowing medium passes, when the flow meter is used to measure the flow of the fluid containing iron, when the flow meter is working, a magnetic field is formed between the N-pole magnet 65 and the S-pole magnet 66. The magnetic flux lines are cut by the flow of the medium, and the signal is collected through the cooperation of the electrodes 68 on both sides. Under the operation of the converter 62, the flow information can be converted, and the display table 64 shows that when the flow passes, due to the formation of a magnetic field between the N-pole magnet 65 and the S-pole magnet 66, it is easy to cause the flow containing iron. The adsorption of substances on the pipe wall and the accumulation of iron-containing substances during long-term detection will cause blockage of the pipeline, reduce the flow rate of the medium, and affect the detection results. In this case, a servo motor 9 is set. Under the cooperation of the reciprocating operation of the servo motor 9, it can drive the screw 10 to rotate forward or reverse, and can drive the sliding tube 5 to slide along the flow tube 1. During the sliding process of the sliding tube 5, the flow detection component 6 follows the movement. During the movement of the flow detection component 6, the positions of the N-pole magnet 65 and the S-pole magnet 66 are rotated, which can avoid the continuous adsorption of iron-containing substances, effectively avoid the adsorption of iron-containing impurities, ensure the penetration of the electromagnetic meter, ensure the accuracy of the test results, and avoid the accumulation and blockage of impurities, so as to carry out continuous and effective detection.

[0034] The above structure is provided with a servo motor 9. Under the cooperation of the reciprocating operation of the servo motor 9, it can drive the screw rod 10 to rotate forward or reverse, and can drive the sliding tube 5 to slide along the flow tube 1. During the sliding process of the sliding tube 5, the flow detection component 6 follows the movement. During the movement of the flow detection component 6, the positions of the N-pole magnet 65 and the S-pole magnet 66 are rotated, which can avoid the continuous adsorption of iron-containing substances, effectively avoid the adsorption of iron-containing impurities, ensure the penetration of the electromagnetic meter, ensure the accuracy of the test results, and avoid the accumulation and blockage of impurities, so as to carry out continuous and effective detection.

[0035] Example 2

[0036] See also Figure 6 As shown, the assembly joint assembly 8 includes a fixed ring 81, a conical head 86 is fixed on the fixed ring 81, and a rubber pad 87 is sleeved on the outside of the conical head 86. The circumferential wall of the fixed ring 81 is provided with notches in an annular array, and a swing ring 82 is installed in the notch through the rotation of the pin. A screw 83 is fixed on the swing ring 82, and a rubber ring 84 is sleeved on the screw 83. A locking nut 85 is rotatably assembled on the screw 83. The fixed ring 81 is connected to the second connecting sleeve 7, which is arranged on the outside of the flow tube 1. When working, the electromagnetic flowmeter When connecting pipelines, the medium pipeline is docked on the conical head 86. A rubber pad 87 is provided on the conical head 86. The conical head 86 is set to a conical structure, which can be docked more quickly. After docking, the connection of the medium pipeline can be better guaranteed. The screw 83 is inserted into the mounting hole of the flange of the medium pipeline. The screw 83 can swing with the cooperation of the swing ring 82 and can adapt to the splicing of flanges with different apertures. With the cooperation of the locking nut 85, the flange installation of the medium pipeline can be realized, which can ensure the connection effect, splicing accuracy and sealing, and achieve a more stable connection effect.

[0037] The above structure is set up by docking the medium pipeline on the conical head 86, and a rubber pad 87 is provided on the conical head 86. The conical head 86 is set to a conical structure, which can be docked more quickly. After docking, it can better ensure the connection of the medium pipeline, and can cooperate to realize the flange installation of the medium pipeline, which can ensure the connection effect, splicing accuracy and sealing, and achieve a more stable connection effect.

[0038] Working principle: When the flowing medium passes through, when the flow meter detects the flow of the fluid containing iron, when the flow meter is operating, a magnetic field is formed between the N-pole magnet 65 and the S-pole magnet 66. The magnetic flux lines are cut by the flow of the medium, and the signal is collected through the cooperation of the electrodes 68 on both sides. Under the operation of the converter 62, the flow information can be converted and displayed on the display table 64. When the flow passes through, due to the formation of a magnetic field between the N-pole magnet 65 and the S-pole magnet 66, it is easy to cause the iron-containing substances to be adsorbed on the pipe wall. During the long detection process, the accumulation of iron-containing substances will cause the pipe to be blocked, and at the same time reduce the flow rate. Low medium flow rate affects the test results. In this case, a servo motor 9 is provided. Under the cooperation of the reciprocating operation of the servo motor 9, the screw rod 10 can be driven to rotate forward or reverse, and the sliding tube 5 can be driven to slide along the flow tube 1. During the sliding process of the sliding tube 5, the flow detection component 6 follows the movement. During the movement of the flow detection component 6, the positions of the N-pole magnet 65 and the S-pole magnet 66 are rotated, which can avoid the continuous adsorption of ferrous substances, effectively avoid the adsorption of ferrous impurities, ensure the penetration of the electromagnetic meter, ensure the accuracy of the test results, and avoid the accumulation and blockage of impurities, so as to enable continuous and effective detection.

[0039] When connecting the pipeline of the electromagnetic flowmeter, the medium pipeline is docked on the conical head 86. A rubber pad 87 is provided on the conical head 86. The conical head 86 is set to a conical structure, which can be docked more quickly. After docking, the connection of the medium pipeline can be better guaranteed. The screw 83 is inserted into the mounting hole of the flange of the medium pipeline. The screw 83 can swing with the cooperation of the swing ring 82 and can adapt to the splicing of flanges with different apertures. With the cooperation of the locking nut 85, the flange installation of the medium pipeline can be realized, which can ensure the connection effect, splicing accuracy and sealing, and achieve a more stable connection effect.

[0040] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An electromagnetic flowmeter, comprising a flow tube (1), wherein a first connecting sleeve (2) is fixed to the outside of one end of the flow tube (1), a sliding tube (5) is sleeved on the middle of the flow tube (1), and a flow detection component (6) is installed on the outside of the sliding tube (5), characterized in that: A rod hole is provided on the end surface of the first connecting sleeve (2), the flow detection assembly (6) includes a fixed frame (61), a guide rod (11) is fixed on the side of the fixed frame (61), one end of the guide rod (11) is inserted into the rod hole, a fixing plate (12) is fixed on the outer circumferential surface of the sliding tube (5), a mounting groove (4) is provided on the circumferential surface of the first connecting sleeve (2), a servo motor (9) is installed in the mounting groove (4), a screw rod (10) is installed at the output end of the servo motor (9), a screw hole is provided in the fixing plate (12), and one end of the screw rod (10) passes through the screw hole in the fixing plate (12); An N-pole magnet (65) and an S-pole magnet (66) are fixed to the outer side of the circumferential surface of the sliding tube (5), and the N-pole magnet (65) and the S-pole magnet (66) are arranged in opposite directions. Two electrodes (68) are fixed to the outer side of the circumferential surface of the sliding tube (5), and the two electrodes (68) are arranged in opposite directions. The connection orientation of the electrodes (68) is perpendicular to the connection orientation of the N-pole magnet (65) and the S-pole magnet (66). One end of the sliding tube (5) is connected and fixed with a second connecting sleeve (7), and an assembly joint assembly (8) is installed at the end of the second connecting sleeve (7); the assembly joint assembly (8) includes a fixing ring (81), a conical head (86) is fixed on the fixing ring (81), and a rubber pad (87) is sleeved on the outer side of the conical head (86); The circumferential wall of the fixed ring (81) is provided with notches in an annular array, and a swing ring (82) is rotatably mounted in the notch through a pin shaft. A screw (83) is fixed to the swing ring (82), a rubber ring (84) is sleeved on the screw (83), and a locking nut (85) is rotatably mounted on the screw (83).

2. An electromagnetic flowmeter according to claim 1, characterized in that: A mounting frame (67) is fixed on the outer side of the sliding tube (5), a converter (62) is mounted on the mounting frame (67), a fixing rod (63) is mounted on the converter (62), a display meter (64) is mounted on the fixing rod (63), the electrode (68) is connected to the converter (62) via a signal line, and the converter (62) is connected to the display meter (64) via a signal line.

3. An electromagnetic flowmeter according to claim 2, characterized in that: A fixing frame (61) is fixed on the outside of the sliding tube (5), and the fixing frame (61) is covered on the outside of the N-pole magnet (65) and the S-pole magnet (66).

4. The electromagnetic flowmeter according to claim 1, characterized in that: The fixing ring (81) is connected to the second connecting sleeve (7), and the second connecting sleeve (7) is arranged outside the flow tube (1).

5. The electromagnetic flowmeter according to claim 4, characterized in that: A battery box (3) is embedded in the first connecting sleeve (2), a storage battery is installed in the battery box (3), the storage battery is connected to the mounting slot (4), and a control circuit board is provided on the connecting circuit, which can be used to control the rotation duration and rotation direction of the mounting slot (4).

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