CN216173179U

CN216173179U - Totally-enclosed electromagnetic iron remover

Info

Publication number: CN216173179U
Application number: CN202122639963.4U
Authority: CN
Inventors: 孔祥财; 叶玉君; 颜奕刚; 孙文兵
Original assignee: Fujian Hongshan Thermoelectricity Co ltd
Current assignee: Fujian Hongshan Thermoelectricity Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-05
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a totally-enclosed electromagnetic iron remover, which comprises a shell and a magnetic system, wherein the magnetic system consists of an iron core and a coil group wound on the outer side of the iron core, the coil group consists of an outer coil and an inner coil, the shell is provided with a yoke plate group, a supporting plate group and a magnetic conduction cylinder, the utility model effectively improves the heat dissipation effect in the coil, has good moisture resistance, achieves small change of cold and hot magnetic fields, low power, low energy consumption and economical use, can run for a long time under the condition of 50 ℃ of ambient temperature, has a single-stage deironing efficiency of more than 95 percent, and has a service life of more than 30 years.

Description

Totally-enclosed electromagnetic iron remover

Technical Field

The utility model relates to a totally-enclosed electromagnetic iron remover.

Background

At present, suspension type iron removers at home and abroad can be divided into electromagnetic and permanent magnet types according to excitation modes. The permanent magnet iron remover has the advantages of no maintenance and low failure rate, but the magnetic field intensity of the permanent magnet iron remover is limited by the performance and cost of magnetic materials and cannot be too large, so that the requirement of a coal conveying system of a thermal power plant on iron removal cannot be met, and the permanent magnet iron remover in the thermal power plant is replaced by electromagnetism. At present, the cooling modes of the electromagnetic iron remover comprise self cooling, air cooling, water cooling, oil cooling and the like. Wherein the water-cooling and oil-cooling electromagnetic iron remover takes away heat by a cooling medium; the self-cooling electromagnetic iron remover takes heat generated by self-winding excitation away by air convection with air as a medium, is convenient to use and is generally applied to a coal conveying system of a thermal power plant due to small maintenance amount, but has certain difficulty in design of a heat dissipation mode for ensuring good heat dissipation effect of the self-cooling electromagnetic iron remover. Other water-cooling, oil-cooling or air-cooling type electromagnetic iron removers all need to have a set of cooling system that is independent respectively, if once its cooling system goes wrong, the complete machine just can not normally work, therefore its range of application does not have the iron remover application of self-cooling form extensively. The electromagnetic disc type iron remover used at present is to achieve the purpose of good heat dissipation, heat dissipation holes are formed in the upper portion and the lower portion of a disc, the heat dissipation holes cannot prevent a large amount of external coal dust and moist salt mist type air from entering the interior of the iron remover, effective measures are not taken for windings in the iron remover to prevent the windings from contacting with the dust and the salt mist type air, and as long as time passes, the more the coal dust accumulates in the iron remover, the salt mist type air enables the disc type iron remover on a coal conveying system to be frequently subjected to insulation reduction, excitation disappearance and system shutdown phenomena.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the existing product and provide a totally-enclosed electromagnetic iron remover.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the totally-enclosed electromagnetic iron remover comprises a shell and a magnetic system, wherein the magnetic system is positioned in the shell, the magnetic system comprises an iron core and a coil assembly wound outside the iron core, the coil assembly comprises an outer coil and an inner coil, the shell is provided with a yoke plate assembly, a support plate assembly, a magnetic conduction cylinder, a barrel and a junction box, the yoke plate assembly is provided with an air outlet, the support plate assembly is provided with an air inlet, the junction box is fixedly connected with the yoke plate assembly, the support plate assembly and the magnetic conduction cylinder are fixedly connected with the yoke plate assembly, the magnetic conduction cylinder is sleeved outside the support plate assembly, the support plate assembly comprises an inner coil support plate and an outer coil support plate, the inner coil support plate is sleeved outside the inner coil, the outer coil support plate is sleeved outside the outer coil, the barrel is positioned between the inner coil support plate and the outer coil support plate, the air outlet and the air inlet are communicated with the barrel, and the inner coil is filled with epoxy resin in vacuum, the air inlet is used for introducing cold air.

Preferably, the junction box is located above the yoke plate group.

Preferably, the yoke plate group is composed of a first yoke plate and a second yoke plate.

Preferably, the inner coil support plate and the outer coil support plate are both annular.

Preferably, gaps are arranged between the cylinder and the inner coil supporting plate and between the cylinder and the outer coil supporting plate, the air outlet and the air inlet are communicated with the gaps, and epoxy resin is filled in the gaps.

Preferably, the outer coil and the inner coil are both made of double glass fiber-coated flat aluminum wires, and windings of the outer coil and the inner coil are both of an inner-outer double-layer structure and are made of electrical insulation materials not lower than H level.

Preferably, the junction box comprises a flange, a shell and a box cover, the shell is detachably connected with the box cover through the flange, a sealing ring is installed between the box cover and the flange, the shell is provided with an incoming line position, and a metal grid is installed on the incoming line position.

Preferably, the metal glans is flared.

The utility model has the following beneficial effects: according to the utility model, the number of turns of the coil layer is increased, the supply current is reduced, the excitation is ensured not to be reduced, the coil group is completely wrapped by the magnetic conduction cylinder, and the coil layer winding is completely sealed and filled in the gap between the cylinder body and the inner and outer coil supporting plates by adopting an epoxy filling mode, so that no air exists in the coil, and the heat dissipation effect in the coil is effectively improved; the box cover and the shell are sealed completely by the sealing ring, so that external coal dust and wet salt mist air cannot enter the junction box and the interior of the iron remover to damage the winding, and the iron remover is not afraid of flushing the iron remover with water on site, so that the iron remover becomes a true fully-closed type; the utility model adopts a full-sealing structure, has good moisture resistance, the winding is made of an electrical insulating material not lower than H level, the winding adopts a double-glass fiber wrapped flat aluminum wire, the winding adopts an inner and outer double-layer structure, the number of turns of a coil layer is increased, the power supply current is reduced, the excitation power is reduced, the temperature rise of the coil is reduced on the premise of ensuring the excitation performance of the iron remover, the excitation provided by the coil is more stable, the temperature rise is lower, the highest temperature of the surface of equipment is less than or equal to 75 ℃ at the room temperature of 35 ℃, the change of cold and hot magnetic fields is small, the power is low, the energy consumption is small, the use is economical, the winding can run for a long time at the environmental temperature of 50 ℃, the single-stage iron removal efficiency is more than 95 percent, the service life is more than 30 years, thereby better ensuring the long-term normal running of a coal conveying system and the safety of downstream equipment, and protecting belts and related equipment.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the junction box.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings of the specification:

as shown in fig. 1 and 2, the totally enclosed electromagnetic iron remover includes a housing 1 and a magnetic system, the magnetic system is located in the housing 1, the magnetic system is composed of an iron core 4 and a coil assembly 6 wound outside the iron core 4, the coil assembly 6 is composed of an outer coil 61 and an inner coil 62, the housing 1 is provided with a yoke plate assembly, a support plate assembly 5, a magnetic conduction cylinder 8, a cylinder 7 and a junction box 2, the yoke plate assembly is provided with an air outlet 12, the support plate assembly 5 is provided with an air inlet 11, the junction box 2 is fixedly connected with the yoke plate assembly, the support plate assembly 5 and the magnetic conduction cylinder 8 are fixedly connected with the yoke plate assembly, the magnetic conduction cylinder 8 is sleeved outside the support plate assembly 5, the inner support plate assembly 5 includes a coil support plate 52 and an outer coil support plate 51, the coil support plate 52 is sleeved outside the inner coil 62, the outer coil support plate 51 is sleeved outside the outer coil 61, the cylinder 7 is located between the coil support plate 52 and the outer coil support plate 51, the air outlet 12 and the air inlet 11 are both communicated with the cylinder 7, the inner parts of the outer-layer coil 61 and the inner-layer coil 62 are filled with epoxy resin in a vacuum manner, and the air inlet 11 is used for introducing cold air. The inside of outer coil 61, inlayer coil 62 all vacuum infusion has epoxy, makes the inside no air of coil exist, and the coefficient of heat conductivity of air is 0.02, and epoxy's coefficient of heat conductivity is about 0.3 for the heat-sinking capability of coil has promoted about 15 times, the effectual radiating effect who improves the coil inside.

As shown in fig. 1 and 2, the junction box 2 is located above a yoke plate group, the yoke plate group is composed of a first yoke plate 9 and a second yoke plate 10, the inner coil supporting plate 52 and the outer coil supporting plate 51 are both annular, gaps 30 are respectively arranged between the cylinder 7 and the inner coil supporting plate 52 and between the cylinder 7 and the outer coil supporting plate 51, epoxy resin is filled in the gaps 30, the air outlet 12 and the air inlet 11 are both communicated with the cylinder 7, so that a heat dissipation channel 13 is formed inside the cylinder 7, the heat dissipation channel 13 is communicated with the air outlet 12 and the air inlet 11, and the gaps 30 are both communicated with the air outlet 12 and the air inlet 11. The outer-layer coil 61 and the inner-layer coil 62 are made of double glass fiber-coated flat aluminum wires, and windings of the outer-layer coil 61 and the inner-layer coil 62 are of an inner-outer double-layer structure and are made of electrical insulation materials not lower than H level.

As shown in fig. 2, the junction box 2 includes a flange 14, a housing 16, a box cover 17, the housing 16 is detachably connected with the box cover 17 through the flange 14, a sealing ring 15 is installed between the box cover 17 and the flange 14, the housing 16 is provided with an incoming line position, a metal flange 3 is installed on the incoming line position, and the metal flange 3 is in a horn shape.

According to the utility model, the number of turns of the coil layer is increased through the inner and outer double-layer structure, the power supply current is reduced, the excitation is ensured not to be reduced, the coil group is completely wrapped by the magnetic conduction cylinder, and the coil layer winding is completely sealed and filled in the gap between the cylinder body and the inner and outer coil supporting plates in an epoxy filling mode, so that no air exists in the coil, and the heat dissipation effect in the coil is effectively improved; the box cover and the shell are sealed completely by the sealing ring, so that external coal dust and wet salt mist air cannot enter the junction box and the interior of the iron remover to damage the winding, and the iron remover is not afraid of flushing the iron remover with water on site, so that the iron remover becomes a true fully-closed type; the utility model adopts a full-sealing structure, has good moisture resistance, the winding is made of an electrical insulating material not lower than H level, the winding adopts a double-glass fiber wrapped flat aluminum wire, the winding adopts an inner and outer double-layer structure, the number of turns of a coil layer is increased, the power supply current is reduced, the excitation power is reduced, the temperature rise of the coil is reduced on the premise of ensuring the excitation performance of the iron remover, the excitation provided by the coil is more stable, the temperature rise is lower, the highest temperature of the surface of equipment is less than or equal to 75 ℃ at the room temperature of 35 ℃, the change of cold and hot magnetic fields is small, the power is low, the energy consumption is small, the use is economical, the winding can run for a long time at the environmental temperature of 50 ℃, the single-stage iron removal efficiency is more than 95 percent, the service life is more than 30 years, thereby better ensuring the long-term normal running of a coal conveying system and the safety of downstream equipment, and protecting belts and related equipment.

Performance of operation

1. The iron remover can operate in a strong magnetic field for a long time. The working type is as follows: and (4) a continuous type. A cooling mode: and (4) self-cooling.

2. The control system adopts a first control mode and a second control mode: when the single-path belt type machine operates, the 2 iron removers alternately work on the belt type machine, the iron removers continuously operate to discard iron, and the iron discarding time is adjustable.

3. The thermal state value of the rated central magnetic induction intensity of the iron remover is not less than 120mT when the iron remover runs for a long time, and the single-stage iron removal efficiency is more than 95 percent.

4. Has excellent heat dissipation mode, and is suitable for long-term operation (environment temperature 50 ℃) in summer under high temperature condition.

It should be noted that the above list is only one specific embodiment of the present invention. It is clear that the utility model is not limited to the embodiments described above, but that many variations are possible, all of which can be derived or suggested directly from the disclosure of the utility model by a person skilled in the art, and are considered to be within the scope of the utility model.

Claims

1. The totally-enclosed electromagnetic iron remover is characterized by comprising a shell (1) and a magnetic system, wherein the magnetic system is positioned in the shell (1), the magnetic system is composed of an iron core (4) and a coil group (6) wound on the outer side of the iron core (4), the coil group (6) is composed of an outer coil (61) and an inner coil (62), the shell (1) is provided with a yoke plate group, a supporting plate group (5), a magnetic conduction cylinder (8), a cylinder body (7) and a junction box (2), the yoke plate group is provided with an air outlet (12), the supporting plate group (5) is provided with an air inlet (11), the junction box (2) is fixedly connected with the yoke plate group, the supporting plate group (5) and the magnetic conduction cylinder (8) are fixedly connected with the yoke plate group, the magnetic conduction cylinder (8) is sleeved on the outer side of the supporting plate group (5), the supporting plate group (5) comprises a coil supporting plate (52) and an outer coil supporting plate (51), interior coil layer board (52) cover is in inlayer coil (62) outside, outer coil layer board (51) cover is in outer coil (61) outside, barrel (7) are located between interior coil layer board (52) and outer coil layer board (51), air outlet (12), air intake (11) all communicate with barrel (7), the inside of outer coil (61), inlayer coil (62) all vacuum perfusion has epoxy, air intake (11) are used for letting in cold air.

2. A totally enclosed electromagnetic iron remover according to claim 1, characterized in that said terminal box (2) is located above the yoke plate group.

3. A totally enclosed electromagnetic iron remover according to claim 1, characterized in that said yoke plate group consists of a first yoke plate (9) and a second yoke plate (10).

4. The totally enclosed electromagnetic iron remover according to claim 1, wherein said inner coil support plate (52) and outer coil support plate (51) are both ring-shaped.

5. The totally-enclosed electromagnetic iron remover according to claim 1, wherein gaps (30) are provided between the cylinder (7) and the inner coil supporting plate (52) and between the cylinder (7) and the outer coil supporting plate (51), epoxy resin is filled in the gaps (30), and the air outlet (12) and the air inlet (11) are both communicated with the gaps (30).

6. The totally-enclosed electromagnetic iron remover according to claim 1, characterized in that the outer coil (61) and the inner coil (62) are made of double glass fiber wrapped flat aluminum wires, and the windings of the outer coil (61) and the inner coil (62) are of an inner-outer double-layer structure and made of electrically insulating materials not lower than H-level.

7. The totally-enclosed electromagnetic iron remover according to claim 1, characterized in that said junction box (2) comprises a flange (14), a housing (16), a box cover (17), said housing (16) is detachably connected with said box cover (17) through said flange (14), a sealing ring (15) is installed between said box cover (17) and said flange (14), said housing (16) is provided with an incoming line, said incoming line is provided with a metal flange (3).

8. The totally enclosed electromagnetic iron remover according to claim 7, characterized in that said metal flanges (3) are flared.