Scraper electrode with replaceable sealing gasket for electromagnetic flowmeter

Abstract

The invention relates to a replaceable sealing gasket scraper electrode of an electromagnetic flowmeter, and belongs to the technical field of electromagnetic flowmeters.The replaceable sealing gasket scraper electrode of the electromagnetic flowmeter comprises a scraper rotating rod, the scraper rotating rod is covered with a lining tensioning screw rod, a sealing O-shaped ring is assembled in an annular groove in the scraper rotating rod and inserted into the lining tensioning screw rod, and the sealing O-shaped ring is inserted into the lining tensioning screw rod; the polyurethane gasket is inserted into the lining tensioning screw rod, the polyurethane gasket and the scraper rotating rod form a sealing state, the lining tensioning screw rod is connected with a spinning nut, the spinning nut is matched with the polyurethane gasket, and the scraper rotating rod is rotationally matched with the spinning nut and the polyurethane gasket. The replaceable polyurethane gasket is additionally arranged in the draw-in bolt, meanwhile, the clearance fit between the polyurethane gasket and the scraper rotating rod can be adjusted through the spinning nut, the sealing performance of a product is guaranteed, the abraded sealing gasket can be replaced, water leakage is avoided after the draw-in bolt is used for a long time, and therefore the service life of an instrument is greatly prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnetic flowmeters, and in particular relates to a replaceable sealing pad scraper electrode for an electromagnetic flowmeter. Background Art

[0002] The electromagnetic flowmeter is an inductive instrument manufactured based on Faraday's law of electromagnetic induction to measure the volume flow of conductive media in pipes. When a conductor moves in a magnetic field, an induced electromotive force will be generated at both ends of the conductor in directions perpendicular to the magnetic field and the direction of movement. The magnitude of the electromotive force is proportional to the conductor's movement speed and the magnetic induction intensity of the magnetic field. The volume flow of various conductive media can be measured. Highly adhered and easily crystallized media affect the metering of the instrument. In order to ensure accurate metering, the electrode surface needs to be cleaned frequently. The easiest way is to use a scraper electrode. The electrode surface can be cleaned without dismantling the pipeline. Multiple rotations of the scraper rod will cause wear of the sealing O-ring, which is prone to leakage and reduces the service life of the device. Summary of the invention

[0003] The purpose of the present invention is to provide a replaceable sealing pad scraper electrode for an electromagnetic flowmeter with a simple structure and reasonable design in order to solve the above problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0005] A replaceable sealing pad scraper electrode for an electromagnetic flowmeter comprises a scraper rotary rod, the scraper rotary rod is covered with a liner tensioning screw, the annular groove on the scraper rotary rod is equipped with a sealing O-ring which is inserted into the liner tensioning screw, the polyurethane gasket is inserted into the liner tensioning screw to form a sealing state with the scraper rotary rod, the liner tensioning screw is connected with a spin-on nut which cooperates with the polyurethane gasket, and the scraper rotary rod rotates in cooperation with the spin-on nut and the polyurethane gasket.

[0006] As a further optimization scheme of the present invention, the liner tensioning screw outer sleeve is provided with a base, and the liner tensioning screw outer sleeve is provided with an insulating member, and the insulating member and the base are matched with each other in corresponding positions.

[0007] As a further optimization solution of the present invention, the outer thread of the liner tightening screw is connected with a tightening nut, and the lower end of the tightening nut corresponds to the position of the insulating member.

[0008] As a further optimization scheme of the present invention, a rotary rod wrench is connected to the scraper rotary rod, a rotary rod wrench fastening nut is connected to the rotary rod wrench, and the rotary rod wrench fastening nut is connected to the top end of the scraper rotary rod.

[0009] As a further optimization solution of the present invention, a tension spring is sleeved on the scraper rotary rod, and the tension spring is connected between the spin-down nut and the rotary rod wrench fastening nut.

[0010] As a further optimization scheme of the present invention, a countersunk hole is provided under the liner tensioning screw, and a clamping block is connected to the lower side of the scraper rotary rod at a position corresponding to the countersunk hole, and the clamping block cooperates with the countersunk hole.

[0011] The beneficial effects of the present invention are:

[0012] 1. The present invention adds a replaceable polyurethane gasket in the tension bolt, and the clearance between the polyurethane gasket and the scraper rotary rod can be adjusted by spinning the nut, thereby ensuring the sealing of the product, preventing water leakage during long-term use, and greatly extending the service life of the product.

[0013] 2. The present invention can increase the number of times the scraper rotating rod rotates by replacing the sealing pad scraper electrode, and can also replace the worn sealing pad, thereby greatly extending the service life of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the internal structure of a replaceable sealing pad scraper electrode of an electromagnetic flowmeter of the present invention;

[0015] Figure 2 It is a schematic diagram of the decomposition of a replaceable sealing pad scraper electrode of an electromagnetic flowmeter of the present invention.

[0016] In the figure: 1. Scraper rotary rod; 2. Sealing O-ring; 3. Liner tensioning screw; 4. Polyurethane gasket; 5. Base; 6. Insulator; 7. Tightening nut; 8. Spin nut; 9. Tensioning spring; 10. Rotary rod wrench; 11. Rotary rod wrench tightening nut. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] Example

[0019] like Figure 1 , Figure 2As shown, a replaceable sealing pad scraper electrode of an electromagnetic flowmeter includes a scraper rotary rod 1, the scraper rotary rod 1 is covered with a liner tensioning screw 3, the annular groove on the scraper rotary rod 1 is assembled with a sealing O-ring 2 and inserted into the liner tensioning screw 3, the polyurethane gasket 4 is inserted into the liner tensioning screw 3, and forms a sealing state with the scraper rotary rod 1, so that the scraper rotary rod 1 forms a sealing state with the liner tensioning screw 3 through the sealing O-ring 2, ensuring that there is no leakage between the scraper rotary rod 1 and the liner tensioning screw 3, the liner tensioning screw 3 is connected with a spun-on nut 8, the spun-on nut 8 cooperates with the polyurethane gasket 4, and the scraper rotary rod 1 rotates and cooperates with the spun-on nut 8 and the polyurethane gasket 4.

[0020] The inner lining tensioning screw 3 is covered with a base 5, and the inner lining tensioning screw 3 is covered with an insulating member 6. The insulating member 6 and the base 5 correspond to each other in position and cooperate with each other. The insulating member 6 isolates the inner lining tensioning screw 3 to insulate it from the base 5. The outer thread of the inner lining tensioning screw 3 is connected with a tensioning nut 7, and the lower end of the tensioning nut 7 corresponds to the position of the insulating member 6. The scraper rotary rod 1 is connected with a rotary rod wrench 10, and the rotary rod wrench fastening nut 11 is connected to the rotary rod wrench 10. The tension degree of the polyurethane gasket 4 and the scraper rotary rod 1 is adjusted by spinning the nut 8 to ensure the rotation When the rotary rod wrench 10 is turned, the scraper rotary rod 1 can be easily rotated, and the rotary rod wrench fastening nut 11 is connected to the top of the scraper rotary rod 1. A tensioning spring 9 is sleeved on the scraper rotary rod 1, and the tensioning spring 9 is connected between the spinning nut 8 and the rotary rod wrench fastening nut 11, to ensure that the scraper rotary rod 1 and the liner tensioning screw 3 are always in a tensioned state to maintain a good seal. A countersunk hole is provided under the liner tensioning screw 3, and a card block is connected to the corresponding position of the countersunk hole on the lower side of the scraper rotary rod 1. The card block and the countersunk hole cooperate with each other to assist in positioning the rotating position of the scraper rotary rod 1 during work.

[0021] When in use, the liner tensioning screw 3 and the base 5 are fastened to the measuring tube through the tensioning nut 7. At the same time, the insulating member 6 isolates the insulation between the liner tensioning screw 3 and the base 5. Then, the sealing O-ring 2 assembled in the annular groove on the scraper rotary rod 1 is inserted into the liner tensioning screw 3, so that the scraper rotary rod 1 forms a sealing state with the liner tensioning screw 3 through the sealing O-ring 2 to ensure that there is no leakage between the scraper rotary rod 1 and the liner tensioning screw 3. The polyurethane gasket 4 is inserted into the liner tensioning screw 3 to form a sealing state with the scraper rotary rod 1. The spinning nut 8 adjusts the tension between the polyurethane gasket 4 and the scraper rotary rod 1 to ensure that the scraper rotary rod 1 can easily rotate when the rotary rod wrench 10 is rotated. Finally, the tensioning spring 9 is tightened through the rotary rod wrench 10 and the rotary rod wrench tightening nut 11 to ensure that the scraper rotary rod 1 and the liner tensioning screw 3 are always in a tensioned state to maintain a good seal. The two seals of the sealing O-ring 2 and the polyurethane gasket 4 ensure the sealing of the product, and the use of replaceable sealing gaskets greatly extends the service life of the product.

[0022] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An electromagnetic flowmeter with a replaceable sealing pad scraper electrode, comprising a scraper rotary rod (1), characterized in that: The scraper rotary rod (1) is covered with a liner tensioning screw (3); the annular groove on the scraper rotary rod (1) is equipped with a sealing O-ring (2) which is inserted into the liner tensioning screw (3); the polyurethane gasket (4) is inserted into the liner tensioning screw (3) to form a sealing state with the scraper rotary rod (1); the liner tensioning screw (3) is connected with a spin-on nut (8); the spin-on nut (8) cooperates with the polyurethane gasket (4); the scraper rotary rod (1) rotates in cooperation with the spin-on nut (8) and the polyurethane gasket (4).

2. The replaceable sealing pad scraper electrode of an electromagnetic flowmeter according to claim 1, characterized in that: The inner lining tensioning screw (3) is covered with a base (5), and the inner lining tensioning screw (3) is covered with an insulating member (6), and the insulating member (6) and the base (5) are positioned correspondingly and cooperate with each other.

3. The replaceable sealing pad scraper electrode of an electromagnetic flowmeter according to claim 2, characterized in that: The liner tightening screw (3) is externally threadedly connected to a tightening nut (7), and the lower end of the tightening nut (7) corresponds to the position of the insulating member (6).

4. The replaceable sealing pad scraper electrode of an electromagnetic flowmeter according to claim 1, characterized in that: The scraper rotary rod (1) is connected to a rotary rod spanner (10), the rotary rod spanner (10) is connected to a rotary rod spanner fastening nut (11), and the rotary rod spanner fastening nut (11) is connected to the top end of the scraper rotary rod (1).

5. The replaceable sealing pad scraper electrode of an electromagnetic flowmeter according to claim 4, characterized in that: The scraper rotary rod (1) is sleeved with a tension spring (9), and the tension spring (9) is connected between a spin-down nut (8) and a rotary rod wrench fastening nut (11).

6. The replaceable sealing pad scraper electrode of an electromagnetic flowmeter according to claim 1, characterized in that: A countersunk hole is provided under the inner liner tightening screw rod (3), and a clamping block is connected to a position corresponding to the countersunk hole on the lower side of the scraper rotary rod (1), and the clamping block and the countersunk hole cooperate with each other.

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