Magnetic isolation electromagnetic valve for crust breaking air cylinder of aluminum electrolysis cell

Abstract

The invention provides a magnetic isolation electromagnetic valve for an aluminum electrolysis cell crust breaking air cylinder. The magnetic isolation electromagnetic valve comprises a valve element, a sealing ring, a valve body, an inner magnetic isolation cover, an outer magnetic isolation cover, an inner and outer magnetic isolation cover connecting column fixing nut, an inner and outer magnetic isolation cover connecting column, a blocking piece, a movable iron core, a magnetic isolation ring, a guide sleeve, a static iron core, a winding framework, a coil, a coil shell, a coil shell fixing column and a guide sleeve locking nut. A sealing ring is arranged on a sealing surface of a valve core, movable iron cores are welded at two ends of the valve core to form a valve core assembly, a magnetism isolating ring is welded into a guide sleeve, other parts are assembled in sequence and are loaded into a coil to form a coil assembly, and an inner magnetism isolating cover, an outer magnetism isolating cover, a valve body and all the assemblies are combined to form the magnetism isolating electromagnetic valve. The electromagnetic valve shields a low-frequency magnetic field through the inner magnetism isolating cover and shields a high-frequency magnetic field through the outer magnetism isolating cover; and heat dissipation is realized through staggered through holes. The electromagnetic valve can effectively shield magnetic field interference, the heat dissipation problem is solved while the shielding effect is guaranteed, and the reversing stability and reliability of the electromagnetic valve in the high-temperature and strong-magnetism working environment during aluminum electrolysis are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum electrolytic cell shelling, in particular to a magnetic isolation solenoid valve for an aluminum electrolytic cell shelling cylinder. Background Art

[0002] Aluminum and aluminum alloys are widely used and economical materials. The electrolysis method is often used for their industrial preparation. In the electrolytic cell, a hard crust (mainly a solid mixture of aluminum oxide and cryolite) will form on the surface of the aluminum oxide and cryolite melt due to the decrease in temperature. In order to break the crust layer, replenish aluminum oxide, maintain the normal operation of the electrolytic cell, release the gas channel, and ensure that the electrolysis process is carried out efficiently and stably, a shelling operation is required.

[0003] However, a strong magnetic environment will be formed during the preparation process, and the reliability of the electromagnet of the reversing solenoid valve that controls the action of the shelling cylinder is greatly tested; the electromagnet often has problems such as inadequate reversing and electromagnetic signal interference in a strong magnetic environment, and cannot complete the predetermined action, posing a safety hazard. Therefore, it is necessary to design a magnetic isolation solenoid valve for the shelling cylinder of an aluminum electrolytic cell to ensure the accurate and stable operation of the solenoid valve electromagnet.

[0004] Utility model patent 202222510004.7 discloses a protective cover for preventing the solenoid valve of a fuel dispenser from being interfered with by strong artificial magnetism. The protective cover mainly realizes the anti-magnetic function through an anti-magnetic coating on the outer surface. The problem with this method is that it does not consider the material and structure of the anti-magnetic cover, and does not consider the heat dissipation performance of the anti-magnetic cover, etc., and the protective effect has certain limitations. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a magnetic isolation solenoid valve for a shell breaking cylinder of an aluminum electrolytic cell. The solenoid valve has stable switching and can ensure that the shell breaking cylinder of the aluminum electrolytic cell works quickly and accurately.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a magnetic isolation solenoid valve for an aluminum electrolytic cell shell breaking cylinder, comprising a valve core, a sealing ring, a valve body, an inner magnetic isolation cover, an outer magnetic isolation cover, inner and outer magnetic isolation cover connecting column fixing nuts, inner and outer magnetic isolation cover connecting columns, a baffle, a moving iron core, a magnetic isolation ring, a guide sleeve, a static iron core, a winding frame, a coil, a coil housing, a coil housing fixing column, and a guide sleeve locking nut.

[0007] The inner and outer magnetic isolation covers are box-type shells with the same structure. Circular through holes with equal spacing are arranged on the front and rear sides of the shell for heat dissipation. Circular through holes are arranged on the upper and lower sides to match the air inlet, air outlet and exhaust holes of the valve body. Circular through holes are arranged on the left and right sides for passing the guide sleeve locking nut. A rectangular through hole is also arranged on the upper side to pass through the coil shell.

[0008] Furthermore, the inner magnetic shield material, the iron-nickel alloy, is a high magnetic permeability material that can absorb low-frequency magnetic fields, and the outer magnetic shield material, the copper alloy, has good electrical conductivity and can reflect high-frequency magnetic fields.

[0009] Furthermore, the inner magnetic isolation cover and the outer magnetic isolation cover are fixed by inner and outer magnetic isolation cover connecting columns and inner and outer magnetic isolation cover connecting column fixing nuts to form an inner and outer double-layer magnetic isolation cover.

[0010] Furthermore, there is an air layer in the middle of the inner and outer double-layer magnetic isolation shields, which can reduce the magnetic field coupling effect, prevent the magnetic field from directly propagating between the inner and outer layers, and inhibit eddy currents and heat insulation. The inner and outer double-layer magnetic isolation shields can attenuate the magnetic field to a very low level, effectively improve the shielding performance, save materials, and ensure the accuracy of the solenoid valve switching.

[0011] Preferably, the heat dissipation through holes on both sides of the inner magnetic isolation cover and the outer magnetic isolation cover are arranged in a staggered manner, so as to achieve heat dissipation while ensuring the magnetic field shielding performance.

[0012] Preferably, the magnetic isolation ring, the coil housing fixing column, the inner and outer magnetic isolation cover connecting columns, and the inner and outer magnetic isolation cover connecting column fixing nuts are made of non-magnetic conductive materials.

[0013] Preferably, the magnetic isolation ring made of non-magnetic material can guide the magnetic lines of force, ensure the effective transmission and utilization of the internal magnetic field, avoid the disorder and leakage of the internal magnetic lines of force, and thus improve the working efficiency and performance of the solenoid valve.

[0014] Preferably, the coil housing fixing column made of non-magnetic conductive material can prevent it from interfering with the magnetic field generated by the coil in the solenoid valve.

[0015] Preferably, the inner and outer magnetic shield connecting columns made of non-magnetic conductive materials and the fixing nuts of the inner and outer magnetic shield connecting columns can effectively avoid magnetic short circuit and electromagnetic interference problems, thereby ensuring the shielding performance and structural stability of the magnetic shield.

[0016] In addition, sealing rings are installed on the three sealing surfaces of the valve core, and moving iron cores are welded on the left and right ends to form a valve core assembly.

[0017] Furthermore, the magnetic isolation ring is welded in the guide sleeve, and the sealing ring, baffle and static iron core are installed outside the guide sleeve in sequence and then installed in the winding frame. The coil is installed outside the winding frame and then installed in the coil shell. The threaded column at the end of the guide sleeve passes through the through hole of the coil shell and the guide sleeve locking nut is screwed on to form a coil assembly.

[0018] Furthermore, the coil assembly is fixed to the side end face of the valve body through the coil housing fixing column, and then the sealing ring is compressed by tightening the guide sleeve locking nut to achieve sealing of the side end face of the valve body. Advantages of the present invention

[0019] (1) The inner magnetic shield material, iron-nickel alloy, is a high-permeability material that can reflect high-frequency magnetic fields. The outer magnetic shield material, copper alloy, has good electrical conductivity and can concentrate on absorbing low-frequency magnetic fields. The inner and outer double-layer magnetic shields can attenuate the magnetic field to a very low level, effectively improving the shielding performance, reducing the eddy current effect, saving materials, and greatly reducing the interference of the magnetic field in the aluminum electrolysis plant on the electromagnet in the solenoid valve, improving the reliability of the solenoid valve reversing, and increasing the accuracy of the aluminum electrolysis cell shelling cylinder. (2) The inner and outer layers of the magnetic shield are arranged with staggered through holes to ensure air circulation inside the magnetic shield to achieve heat dissipation, while preventing the external magnetic field from directly entering the shielding area of ​​the magnetic shield to ensure the shielding effectiveness of the magnetic shield; (3) The magnetic isolation ring made of non-magnetic material can ensure the effective transmission and utilization of the internal magnetic field, avoid the disorder and leakage of the internal magnetic lines of force, and thus improve the working efficiency and performance of the solenoid valve; (4) The coil housing fixing column, the inner and outer magnetic shield connecting column, and the fixing nut of the inner and outer magnetic shield connecting column are also made of non-magnetic conductive materials, which can effectively avoid magnetic short circuit and electromagnetic interference problems, thereby ensuring the shielding performance of the magnetic shield. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The invention discloses an exploded view of a magnetic isolation solenoid valve for a shell breaking cylinder of an aluminum electrolytic cell.

[0021] Figure 2 The invention discloses a 1 / 4 cross-sectional view of a magnetic isolation solenoid valve for a shell breaking cylinder of an aluminum electrolytic cell.

[0022] Figure 3 The invention discloses a main cross-sectional view of a magnetic isolation solenoid valve for a shell breaking cylinder of an aluminum electrolytic cell.

[0023] Figure 4 The invention discloses a left sectional view of a magnetic isolation solenoid valve for a shell breaking cylinder of an aluminum electrolytic cell.

[0024] In the figure: 1-valve core, 2-sealing ring, 3-valve body, 4-inner magnetic isolation cover, 5-outer magnetic isolation cover, 6-inner and outer magnetic isolation cover connecting column fixing nut, 7-inner and outer magnetic isolation cover connecting column, 8-blocking piece, 9-moving iron core, 10-magnetic isolation ring, 11-guide sleeve, 12-static iron core, 13-winding frame, 14-coil, 15-coil housing, 16-coil housing fixing column, 17-guide sleeve locking nut. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work, any modifications, equivalent substitutions, improvements, etc., should be included in the protection scope of the present invention.

[0026] It should be noted that all directional indications (such as outside, inside, left, right, etc.) in the embodiments of the present invention are only used to explain the relative position relationship and movement of various components under a certain posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly. Among them, "left" corresponds to Figure 1 The left side of the “right” corresponds to Figure 1 on the right side of the screen.

[0027] See also Figures 1 to 4 , a magnetic isolation solenoid valve for a shell breaking cylinder of an aluminum electrolytic cell of the present invention is described in detail. The magnetic isolation solenoid valve for a shell breaking cylinder of an aluminum electrolytic cell of the present invention is commonly used in the shell breaking process of an aluminum electrolytic cell.

[0028] The invention discloses a magnetic isolation solenoid valve for a shell breaking cylinder of an aluminum electrolytic cell, comprising 1-valve core, 2-sealing ring, 3-valve body, 4-inner magnetic isolation cover, 5-outer magnetic isolation cover, 6-inner and outer magnetic isolation cover connecting column fixing nut, 7-inner and outer magnetic isolation cover connecting column, 8-blocking piece, 9-moving iron core, 10-magnetic isolation ring, 11-guide sleeve, 12-static iron core, 13-winding frame, 14-coil, 15-coil shell, 16-coil shell fixing column, and 17-guide sleeve locking nut.

[0029] The sealing surface of the valve core 1 is installed with a sealing ring 2, and the left and right ends are respectively welded with a moving iron core 6 to form a valve core assembly, and then the valve core assembly is installed into the valve body 3.

[0030] The 10-magnetic isolation ring is welded in the 11-guide sleeve, and the 2-sealing ring, 8-blocking plate, and 12-static iron core are installed in sequence outside the 11-guide sleeve and then installed together in the 13-winding frame, and then the 14-coil is installed outside the 13-winding frame and then installed in the 15-coil shell, the threaded column at the end of the 11-guide sleeve passes through the through hole of the 15-coil shell and is screwed on with the 17-guide sleeve locking nut to form a coil assembly; the coil assembly and the left end face of the 3-valve body are fixed by the 16-coil shell fixing column, and the 2-sealing ring is tightened by tightening the 17-guide sleeve locking nut to achieve the sealing of the left end face of the 3-valve body; the connection and fixing method of the coil assembly and the right end face of the 3-valve body is the same as above.

[0031] The 7-inner and outer magnetic shield connection column passes through the 5-outer magnetic shield, the 4-inner magnetic shield, and the 3-valve body in sequence, and is then fixed with the 6-inner and outer magnetic shield connection column fixing nut to form an inner and outer double-layer magnetic shield.

[0032] The magnetic isolation solenoid valve realizes the reversal of the solenoid valve by changing the energization of the coils at the left and right ends. When the left solenoid valve coil is energized to generate magnetic force, it is enhanced by the static iron core and attracts the moving iron core on the left side of the valve core, so that the air inlet P on the valve body is connected with the working port B, and the working port A is connected with the exhaust port R1. At this time, port A is exhausted and port B is inhaled. Similarly, when the left solenoid valve coil is energized to generate magnetic force, it is enhanced by the static iron core and attracts the moving iron core on the valve core, so that the air inlet P on the valve body is connected with the working port A, and the working port B is connected with the exhaust port R2. At this time, port B is exhausted and port A is inhaled. In addition, the coils at the left and right ends of the solenoid valve cannot be energized at the same time.

[0033] The inner magnetic isolation cover is made of an iron-nickel alloy, has a high magnetic permeability, and can absorb low-frequency magnetic fields. The outer magnetic isolation cover is made of a copper alloy, which has good electrical conductivity and can reflect high-frequency magnetic fields. The inner magnetic isolation cover and the outer magnetic isolation cover are combined to form an inner and outer double-layer magnetic isolation cover, and staggered through holes are arranged on both sides to ensure air circulation in the magnetic isolation cover to achieve heat dissipation, while avoiding the external magnetic field directly aligning with the shielding area of ​​the magnetic isolation cover to ensure the shielding effectiveness of the magnetic isolation cover. The inner and outer double-layer magnetic isolation cover can attenuate the magnetic field to a very low level, effectively improve the shielding performance, reduce the eddy current effect, ensure heat dissipation, save materials, and ensure the accuracy of the switching of the magnetic isolation solenoid valve.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic isolation solenoid valve for shell breaking cylinder of aluminum electrolytic cell, characterized in that: It includes a valve core, a sealing ring, a valve body, an inner magnetic shield, an outer magnetic shield, a fixing nut for connecting the inner and outer magnetic shields, a connecting column of the inner and outer magnetic shields, a baffle, a moving iron core, a magnetic shield ring, a guide sleeve, a static iron core, a winding frame, a coil, a coil housing, a fixing column for the coil housing, and a guide sleeve locking nut; The inner and outer magnetic shields are box-type shells with the same structure. Circular through holes with equal spacing are arranged on the front and rear sides of the shell for heat dissipation. Circular through holes are arranged on the upper and lower sides to match the working holes and exhaust holes of the valve body. Circular through holes are arranged on the left and right sides for passing the guide sleeve locking nut. A rectangular through hole is also arranged on the upper side to pass through the coil shell. The inner magnetic shield material, the iron-nickel alloy, is a high-permeability material that can absorb low-frequency magnetic fields, and the outer magnetic shield material, the copper alloy, has good electrical conductivity and can reflect high-frequency magnetic fields. The inner and outer magnetic isolation covers are fixed by inner and outer magnetic isolation cover connecting columns and inner and outer magnetic isolation cover connecting column fixing nuts to form inner and outer double-layer magnetic isolation covers. An air layer is provided in the middle of the inner and outer double-layer magnetic isolation covers, which can reduce the magnetic field coupling effect, prevent the magnetic field from directly propagating between the inner and outer layers, and inhibit eddy currents and heat insulation. The inner and outer double-layer magnetic isolation covers can attenuate the magnetic field to a very low level, effectively improve the shielding performance, save materials, and ensure the accuracy of the solenoid valve switching.

2. The magnetic isolation solenoid valve for the shell breaking cylinder of aluminum electrolytic cell according to claim 1 is characterized in that: The heat dissipation through holes on both sides of the inner magnetic isolation cover and the outer magnetic isolation cover are arranged in a staggered manner, so as to achieve heat dissipation while ensuring the magnetic field shielding performance.

3. The magnetic isolation solenoid valve for shell breaking cylinder of aluminum electrolytic cell according to claim 1, characterized in that: The magnetic isolation ring, the coil housing fixing column, the inner and outer magnetic isolation cover connecting columns, and the inner and outer magnetic isolation cover connecting column fixing nuts are made of non-magnetic conductive materials.

4. The magnetic isolation solenoid valve for shell breaking cylinder of aluminum electrolytic cell according to claim 1, characterized in that: Sealing rings are installed on the three sealing surfaces of the valve core, and moving iron cores are welded on the left and right ends to form a valve core assembly.

5. The magnetic isolation solenoid valve for shell breaking cylinder of aluminum electrolytic cell according to claim 1, characterized in that: The magnetic isolation ring is welded in the guide sleeve, and the sealing ring, baffle and static iron core are installed outside the guide sleeve in sequence and then installed in the winding frame. The coil is installed outside the winding frame and then installed in the coil shell. The threaded column at the end of the guide sleeve passes through the through hole of the coil shell and the guide sleeve locking nut is screwed on to form a coil assembly. The coil assembly is fixed to the side end face of the valve body through the coil shell fixing column, and then the sealing ring is tightened by tightening the guide sleeve locking nut to achieve the sealing of the side end face of the valve body.

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