Anti-corrosion fluid flowmeter

Abstract

The utility model relates to the technical field of flow meters, in particular to an anti-corrosion liquid flow meter which comprises a magnetic flow meter body, and the magnetic flow meter body comprises a test tube. An anti-corrosion inner pipe is sleeved in the test pipe; the anti-corrosion inner pipe is divided into a left anti-corrosion inner pipe and a right anti-corrosion inner pipe; one end of each anti-corrosion inner pipe is provided with a mounting table, and the other end of each anti-corrosion inner pipe is provided with a connector; a limiting rod is arranged at the top of the mounting table; a notch is formed in the top of the connecting port; a sunken groove is formed in the pipe wall of the connector of the left anti-corrosion inner pipe, and an insertion plate is arranged on the pipe wall of the connector of the right anti-corrosion inner pipe; the concave groove and the insertion plate are embedded with each other; an anti-corrosion layer is arranged in the anti-corrosion inner pipe; according to the device, the anti-corrosion inner pipe is installed in the testing pipe, so that the corrosion resistance of the testing pipe to strong acid and strong alkali solutions is improved, and the problem that a traditional flowmeter lacks necessary corrosion resistance when measuring strong acid and strong alkali fluids is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, in particular to a corrosion-resistant liquid flow meter. Background Art

[0002] A flow meter is a device for measuring the flow rate of a fluid (such as gas or liquid), and is usually installed on a pipe through which the fluid to be measured flows.

[0003] Electromagnetic flowmeter is a new type of flow measurement instrument that has developed rapidly with the development of electronic technology. Electromagnetic flowmeter is an instrument that uses the principle of electromagnetic induction to measure the flow of conductive fluid according to the electromotive force induced when the conductive fluid passes through an external magnetic field. The measuring pipe of this electromagnetic flowmeter is made of fiberglass. Due to the large limitations of the anti-corrosion performance of fiberglass, this electromagnetic flowmeter is not suitable for measuring the flow of high-temperature, strong acid and strong alkali fluids. In addition, when the flanges at both ends of the existing flowmeter are removed for maintenance, the fluid to be measured in the test tube is easy to flow out. If the measured fluid is corrosive, it makes the external objects easily corroded. Utility Model Content

[0004] The purpose of the present application is to provide a corrosion-resistant liquid flow meter, aiming to solve the problems in the prior art.

[0005] An embodiment of the present application provides a corrosion-resistant liquid flowmeter, including an electromagnetic flowmeter body, which includes a test tube; an anti-corrosion inner tube is sleeved inside the test tube; the anti-corrosion inner tube is divided into a left anti-corrosion inner tube and a right anti-corrosion inner tube; one end of the two anti-corrosion inner tubes is provided with a mounting platform, and the other end is a connecting port; a limiting rod is provided on the top of the mounting platform; a notch is provided on the top of the connecting port; the tube wall of the connecting port of the left anti-corrosion inner tube is provided with an indented groove, and the tube wall at the connecting port of the right anti-corrosion inner tube is an insert plate; the indented groove and the insert plate are fitted together; an anti-corrosion layer is provided inside the anti-corrosion inner tube; an annular groove is provided at both ends of the test tube; and a limiting hole is provided on the top of the annular groove.

[0006] Furthermore, the anti-corrosion layer is divided into an inner layer and an outer layer; the inner layer is an adhesion layer, and the outer layer is a polyurethane anti-corrosion coating.

[0007] Furthermore, mounting flanges are provided at both ends of the test tube; and a protective tube is provided outside the mounting flange.

[0008] Furthermore, the protection tube is a columnar tube, and the diameter of the protection tube is larger than the diameter of the mounting flange; the inner wall of the protection tube is evenly coated with polyurethane anti-corrosion coating.

[0009] Furthermore, when the mounting platform is installed in the annular groove, the end surface of the mounting platform is flush with the end surfaces of the mounting flanges on both sides of the measuring tube.

[0010] The beneficial effects of the utility model are as follows: the device installs an anti-corrosion inner tube inside the test tube, which increases the anti-corrosion property of the test tube for strong acid and strong alkali solutions, and solves the problem that the traditional electromagnetic flowmeter lacks the necessary corrosion resistance when measuring strong acid and strong alkali fluids; and the disassembly and installation operation of the anti-corrosion inner tube is relatively simple, and only the anti-corrosion inner tube can be replaced and repaired, saving costs. In addition, protective cylinders are provided on the outer rings of the mounting flanges on both sides to prevent the corrosive liquid in the tube from splashing out during disassembly and maintenance, which may corrode the skin or other items. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the overall structure diagram of the utility model.

[0012] Figure 2 It is a side view of the utility model.

[0013] Figure 3 This is a schematic diagram of the anti-corrosion inner tube structure.

[0014] Figure 4 This is a side view of the anti-corrosion inner tube.

[0015] In the figure:

[0016] 1. Electromagnetic flowmeter body; 2. Protective tube; 3. Mounting flange; 4. Limiting hole; 5. Annular groove; 6. Test tube; 7. Anti-corrosion inner tube; 70. Left anti-corrosion inner tube; 71. Right anti-corrosion inner tube; 72. Mounting table; 73. Limiting rod; 75. Notch; 704. Inward groove; 714. Insert plate; 10. Adhesion layer; 11. Polyurethane anti-corrosion coating. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figures 1 to 4 The corrosion-resistant liquid flowmeter shown includes an electromagnetic flowmeter body 1. The electromagnetic flowmeter body 1 in this embodiment adopts an XKWJ-ZI type integrated electromagnetic flowmeter, which generally includes a magnetic circuit system, a measuring pipeline, a measuring electrode and a casing.

[0019] Magnetic circuit system: Its function is to generate a uniform DC or AC magnetic field. The DC magnetic circuit is realized by permanent magnets. Its advantages are that the structure is relatively simple and it is less disturbed by the AC magnetic field. However, it is easy to polarize the electrolyte liquid in the measuring pipe, so that the positive electrode is surrounded by negative ions and the negative electrode is surrounded by positive ions, that is, the polarization of the electrodes, and the internal resistance between the two electrodes increases, which seriously affects the normal operation of the instrument. When the diameter of the pipeline is large, the permanent magnet is also large, heavy and uneconomical, so the electromagnetic flowmeter generally uses an alternating magnetic field, and is excited by a 50HZ power frequency power supply.

[0020] Measuring pipe: Its function is to allow the conductive liquid to pass through. In order to make the magnetic flux be shunted or short-circuited when the magnetic lines of force pass through the measuring pipe, the measuring pipe must be made of non-magnetic, low-conductivity, low-thermal conductivity and mechanically strong materials. Non-magnetic stainless steel, fiberglass, high-strength plastic, aluminum, etc. can be used.

[0021] Measuring electrode: Its function is to induce an induced potential signal proportional to the measured value. The electrode is generally made of non-magnetic stainless steel and is required to be flush with the lining so that the fluid can pass through without obstruction. It should be installed in the vertical direction of the pipeline to prevent sediment from accumulating on it and affecting the measurement accuracy.

[0022] Shell: Made of ferromagnetic material, it is the outer cover of the excitation coil of the distribution system and isolates the interference of the external magnetic field.

[0023] The test tube 6 of the electromagnetic flowmeter body 1 is internally sleeved with an anti-corrosion inner tube 7; the anti-corrosion inner tube 7 is divided into a left anti-corrosion inner tube 70 and a right anti-corrosion inner tube 71; one end of the two anti-corrosion inner tubes is provided with a mounting platform 72, and the other end is a connecting port; a limit rod 73 is provided on the top of the mounting platform 72; a notch 75 is provided on the top of the connecting port; the tube wall of the connecting port of the left anti-corrosion inner tube 70 is provided with an indented groove 704, and the tube wall at the connecting port of the right anti-corrosion inner tube 71 is an insert plate 714; the indented groove 7 04 and the insertion plate 714 are interlocked with each other; after the left and right anti-corrosion inner tubes are connected through the sunken groove 704 and the insertion plate 714, the notch 75 on the top is combined to form a closed-loop channel opening for inserting the measuring electrode; the interior of the anti-corrosion inner tube 7 is provided with an anti-corrosion layer; both ends of the test tube 6 are provided with annular grooves 5; a limiting hole 4 is provided on the top of the annular groove 5; the limiting rod 73 and the limiting hole 4 are used in conjunction with each other to position the left and right anti-corrosion inner tubes, so that the connecting port can be smoothly interlocked and connected.

[0024] The anti-corrosion layer is divided into an inner layer and an outer layer; the inner layer is an adhesion layer 10, and the outer layer is a polyurethane anti-corrosion coating 11; the anti-corrosion layer is used to protect the anti-corrosion inner tube 7, thereby achieving the measurement effect of strong acid and strong alkali fluids, and preventing strong acid and strong alkali fluids from corroding the anti-corrosion inner tube 7 and the electromagnetic flowmeter body 1.

[0025] The two ends of the test tube 6 are provided with mounting flanges 3 ; the outside of the mounting flange 3 is provided with a protective tube 2 .

[0026] The protective tube 2 is a cylindrical tube, and the diameter of the protective tube 2 is larger than the diameter of the mounting flange 3; the inner wall of the protective tube 2 is evenly coated with a polyurethane anti-corrosion coating 11; the length of the protective tube 2 is based on being able to wrap the flange connection, and can be appropriately increased, but should not be too long to avoid affecting the installation of the flange; when the mounting flange 3 is opened for repairing or replacing the flow meter, the protective tube 2 can prevent the corrosive liquid inside the test tube 6 from overflowing and injuring the human body and external objects.

[0027] When the mounting platform 72 is installed in the annular groove 5, the end surface of the mounting platform 72 is flush with the end surfaces of the mounting flanges 3 on both sides of the measuring tube 6. This design is to ensure that the sealing connectivity of the mounting flanges 3 on both sides is not affected.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A corrosion-resistant liquid flowmeter, comprising an electromagnetic flowmeter body, characterized in that: The electromagnetic flowmeter body includes a test tube; an anti-corrosion inner tube is sleeved inside the test tube; the anti-corrosion inner tube is divided into a left anti-corrosion inner tube and a right anti-corrosion inner tube; one end of the two anti-corrosion inner tubes is provided with a mounting platform, and the other end is a connecting port; a limiting rod is provided on the top of the mounting platform; a notch is provided on the top of the connecting port; the tube wall of the connecting port of the left anti-corrosion inner tube is provided with an indented groove, and the tube wall at the connecting port of the right anti-corrosion inner tube is an insert plate; the indented groove and the insert plate are fitted together; an anti-corrosion layer is provided inside the anti-corrosion inner tube; an annular groove is provided at both ends of the test tube; and a limiting hole is provided on the top of the annular groove.

2. The corrosion-resistant liquid flow meter according to claim 1, characterized in that: The anti-corrosion layer is divided into an inner layer and an outer layer; the inner layer is an adhesion layer, and the outer layer is a polyurethane anti-corrosion coating.

3. The corrosion-resistant liquid flow meter according to claim 1, characterized in that: Both ends of the test tube are provided with mounting flanges; and a protective tube is provided outside the mounting flange.

4. The corrosion-resistant liquid flow meter according to claim 3, characterized in that: The protection tube is a columnar tube, and the diameter of the protection tube is larger than the diameter of the mounting flange; the inner wall of the protection tube is evenly coated with polyurethane anti-corrosion paint.

5. The corrosion-resistant liquid flow meter according to claim 1, characterized in that: When the mounting platform is installed in the annular groove, the end surface of the mounting platform is flush with the end surfaces of the mounting flanges on both sides of the measuring tube.

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