CN104994709B - Plate type integral heat pipe for heat radiation of electromagnetic iron remover - Google Patents

Abstract

A plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover comprises a rectangular flat plate, on which evaporation channels parallel to each other are evenly distributed, the evaporation channels are located between the upper and lower surfaces of the rectangular flat plate, and their axes are parallel to the upper and lower surfaces of the rectangular flat plate; a through hole is provided in the center of the rectangular flat plate, and the axis of the through hole is perpendicular to the upper and lower surfaces of the rectangular flat plate; a hollow ring is provided on the circumference of the through hole, and the evaporation channels penetrating the circumference of the through hole are connected to the inner cavity of the hollow ring; a steam separation pipe is provided on each of the first and second side surfaces of the rectangular flat plate, and the steam separation pipe is a hollow pipe with closed ends, and the evaporation channel port on the first or second side surface is connected to the inner cavity of the steam separation pipe arranged on the corresponding side; a straight finned tube connected to the inner cavity of the steam separation pipe is provided on each steam separation pipe. The present invention has a simple and reliable structure, strong heat transfer capacity, and high cost performance. Compared with a radiator composed of independent multiple heat pipes, it has stronger heat dissipation capacity, better temperature balancing effect, higher processing and installation efficiency, and lower production cost, and is suitable for industrial application.

Description

Plate type integral heat pipe for heat dissipation of electromagnetic iron remover

technical field

The invention discloses a plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover, belonging to the technical field of heat transfer enhancement.

technical background

Electromagnetic iron remover is a device that uses strong magnetic attraction to remove ferromagnetic impurities on material conveyor belts. The equipment and its cleaning work have the following functions: first, to protect the conveyor belt from being damaged by ferromagnetic impurities; second, to ensure the safe and stable operation of follow-up equipment, such as crushers, grinders, boilers, etc.; third, to ensure or improve related products Quality, if the ferromagnetic impurities are not removed, the color of ceramic products will be seriously affected; the fourth is to improve the quality of port material transportation to meet customer requirements. Based on the function of electromagnetic iron remover, this equipment is widely used in mining, chemical industry, thermal power generation, cement, glass, ceramics, building materials, food and feed processing, port shipping and other industries.

Electromagnetic iron remover actually uses the principle of electromagnetic conversion to work. Theoretically speaking, the electromagnetic suction of the electromagnetic iron remover is proportional to the square of the current flowing through the coil at the same power, so the greater the current, the greater the suction and the stronger the iron removal ability. However, the physical principle also points out that the coil is a resistance. The greater the current, the greater the heat and the higher the temperature. The increase in temperature will further increase the resistance of the coil, and the increase in resistance will generate more heat, thus forming a negative cycle. . In this case, there can only be two results, one is that the coil or equipment is damaged or burned at high temperature, and the other is that the current reduces the iron removal performance.

Based on the working principle of the above-mentioned electromagnetic iron remover, it can be seen that in order to ensure the safe and stable long-term operation of the electromagnetic iron remover, it is necessary to dissipate heat quickly and in a timely manner, especially for large electromagnetic iron removers.

As we all know, heat pipes are called thermal superconductors, and their excellent thermal conductivity has enabled them to be used in electromagnetic iron removers very early. According to the current market survey, the heat pipe has become the main heat dissipation method of the electromagnetic separator, and both manufacturers and the market regard it as an effective technical means.

However, with the increasing economic scale, the electromagnetic iron remover is becoming larger and larger, correspondingly, its power and calorific value are also increasing. At present, the heating power of large electromagnetic iron remover has reached 40-50 kilowatts. The aforementioned thermal problems It is more prominent, and the technical difficulty of heat dissipation is getting higher and higher. Judging from the actual situation of current use, the existing heat pipe heat dissipation technology is not enough to deal with it, so the development of a new heat pipe heat dissipation technology suitable for electromagnetic iron remover has important practical significance for electromagnetic iron remover.

Chinese patent 02258232.0 proposes a heat pipe cooling technology, which is characterized in that a plurality of heat pipes are installed and clamped in two aluminum plates that act as heat conductors, thereby leading the heat out of the coil. The analysis found that the patent has the following deficiencies: first, there is the thermal resistance of the aluminum plate; second, there is the contact thermal resistance between the heat pipe and the aluminum plate; third, the aluminum plate needs a half-moon arc groove and many screw holes, and the processing and installation are relatively complicated; four. The first is the nested installation of the cooling fins and the condensation section, the installation is more complicated, and there is contact thermal resistance between the metals; the fifth is that the thickness of the heat conduction plate is uneven, which will lead to slightly uneven temperature of the coil. Chinese patent 200710133466.9 proposes a heat pipe heat dissipation technology, which is characterized in that a plurality of heat pipes are embedded with each other to form a whole, and the whole is inserted into a coil to export heat. The analysis found that the patent has the following deficiencies: first, the processing and installation of heat pipes with concave-convex structures are more complicated; second, there are both contact thermal resistance and metal thermal resistance in the interlocking part; third, the plane after interlocking cannot guarantee a better plane Fourth, more metal materials are consumed. The heat pipe heat dissipation technology proposed in Chinese patent 200920232862.1 is characterized in that multiple heat pipes are inserted horizontally into coils side by side at a certain interval, and the coils and heat pipes can only be in point contact, the contact area is too small, and the thermal resistance of the interval is very large. The heat pipe heat dissipation technology proposed in Chinese patent 88105470.4 is characterized in that multiple heat pipes are vertically inserted into the coil, and the gaps around the heat pipes are filled with thermally conductive fillers. Compared with metal, it is still a poor conductor and has a large thermal resistance; the heat pipe protrudes from the upper part of the iron remover, which is not conducive to natural heat dissipation. Chinese patent 200710134552.1 proposes an integral heat pipe technology, which is characterized by: the heat pipe is formed by an annular container, a middle partition and a tubular array, the coil is placed in the annular container to form the evaporation section, and the tubular array is the condensation section, which is located on the upper part of the electromagnetic separator. Its shortcomings are as follows: first, it is difficult to solve the sealing problem of the lead wires of the coil, thereby destroying the vacuum degree of the heat pipe; second, the aluminum condensation section and the steel intermediate partition are not easy to weld; third, the tubular array condensation section is vertically drawn from the upper part of the iron remover , It is not conducive to adopting natural convection to dissipate heat.

It can be seen from the above-mentioned published technical documents that due to the defects of the heat pipe structure in the prior art, the heat pipe heat dissipation technology of the electromagnetic iron remover currently researched and developed still has problems such as poor heat dissipation effect, high temperature, and uneven temperature. The common defects are: 1. There are many additional thermal resistances, such as metal thermal resistance, contact thermal resistance, filler thermal resistance, etc., which lead to a decrease in the heat dissipation performance of the heat pipe, and the heat dissipation effect is not good; In the electromagnetic coil of ironware, the actual heat dissipation process is that each heat pipe operates independently, and there is no match or complementarity between them, resulting in the quality of local heat dissipation in the electromagnetic coil, which is completely determined by the heat dissipation effect of the heat pipe located there. The electromagnetic coil itself has a phenomenon of uneven heating. Therefore, the temperature in the local area of the electromagnetic coil with a large heat generation continues to maintain a high level, which affects the normal use of the electromagnetic coil. In severe cases, the electromagnetic coil is burned.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a plate-type integral heat pipe for electromagnetic iron remover heat dissipation with simple and reliable structure, strong heat transfer capacity and high cost performance.

A plate type integral heat pipe for heat dissipation of electromagnetic iron remover of the present invention is realized by adopting the following scheme:

The plate-type integral heat pipe includes a rectangular flat plate, on which there are evenly distributed evaporation channels parallel to each other, and the evaporation channels are located between the upper and lower surfaces of the rectangular flat plate, and their axes are parallel to the The upper and lower surfaces of the rectangular flat plate; the evaporation channel extends from the first side in the thickness direction of the rectangular flat plate and runs through the second side parallel to the first side;

A through hole is provided in the center of the rectangular flat plate, the axis of the through hole is perpendicular to the upper and lower surfaces of the rectangular flat plate;

A hollow ring is provided on the circumference of the through hole, and the evaporation channel running through the circumference of the through hole communicates with the inner cavity of the hollow ring;

The first side and the second side of the rectangular plate are each provided with a steam distribution pipe, and the steam distribution pipe is a hollow tube with both ends closed, and the evaporation channel ports on the first side and the second side are It communicates with the inner cavity of the steam distribution tube arranged on the corresponding side; each steam distribution tube is provided with a straight finned tube communicating with the inner cavity of the steam distribution tube.

A plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover of the present invention cuts the plate-type integral heat pipe into 2 or 4 individual pieces through the center of the through-hole circle with a longitudinal section parallel or perpendicular to the axis of the evaporation channel. An equalization tube is provided on the cutout section of the monomer with the evaporation channel port, one end of the equalization tube is closed, the other end communicates with the hollow ring, and its side communicates with the evaporation channel port passing through the notch section.

The invention relates to a plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover. The thickness of the rectangular flat plate is 10-50 mm, preferably 10-30 mm.

The present invention is a plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover. The cross-section of the evaporation channel or steam distribution pipe is one of rhombus, rectangle, square, parallelogram, trapezoid, regular hexagon, circle and ellipse ;

The cross-sectional area of the evaporation channel is 100-2500mm ² , preferably 150-1600mm ² , more preferably 200-900mm ² ;

The cross-sectional area of the steam distribution pipe is 1-12 times, preferably 2-10 times, more preferably 3-8 times the cross-sectional area of the evaporation channel.

The present invention is a plate-type integral heat pipe for heat dissipation of electromagnetic iron remover, the cross-section of the hollow ring or equalizing tube is rectangular or square, and the cross-sectional area of the hollow ring or equalizing tube is 100-5000 mm ² , preferably 200-3000 mm ² , more preferably The cross-sectional area is 300-2000mm ² .

The invention relates to a plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover. The straight finned tube is connected to the steam distribution pipe through an elbow, and the straight finned tube and the elbow are welded into one body.

The present invention is a plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover. On the steam distribution pipe, 1-3 rows of cold end holes 14 are evenly arranged in the axial direction, and the straight finned tubes are installed on the cold end holes.

The present invention is a plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover. The angle α between the axis of the straight finned tube and the upper surface of the rectangular flat plate is: 30°≤α≤90°, preferably: 75°≤α≤ 90°, the optimum is α=90°.

The invention relates to a plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover. The material of the rectangular flat plate, hollow ring, steam distribution pipe, equalizing pipe, straight finned pipe, and bent pipe is selected from aluminum alloy or copper alloy.

The invention relates to a plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover. The straight finned tube is formed by thermal stretching or thermal extrusion, and the upper end of the straight finned tube is closed.

The invention relates to a plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover. The evaporation channel is formed by hot extrusion or hot stretching.

The invention relates to a plate-type integral heat pipe for heat dissipation of an electromagnetic iron remover, and the working medium is selected from one of acetone, deionized distilled water, ethanol and methanol.

Technical effect of the present invention

The plate-type integral heat pipe proposed by the present invention is applied to the electromagnetic separator and has the following good effects and advantages:

The plate-type integral heat pipe can generally be regarded as composed of three major parts: an evaporating end, a steam distribution pipe, and a condensing end. The evaporating end is composed of a hollow ring, an evaporating channel arranged in a rectangular flat plate, and an equalizing tube. The condensation end is composed of straight finned tubes and bent tubes. The steam distribution pipe connects the evaporating end and the condensing end into one, so that the internal spaces are connected and integrated to form a network. The heat pipe with this structure can keep the pressure, temperature and flow of the working medium at the evaporating end automatically balanced, thus obtaining The following effects: 1. Good contact with the coil, eliminating the thermal resistance caused by splints and fillers and related contact thermal resistance; 2. The thermal state and flow state of the internal working medium are stable and uniform, and the heat conduction of the rectangular flat plate is uniform, which can make the coil temperature uniform and stable. Effectively eliminate the local high temperature of the coil. One side of the steam distribution pipe is connected to the port of the evaporation channel, and the other side is evenly distributed with the condensing end of the straight finned tube whose axis and the upper surface of the rectangular plate form an angle of 30° to 90°. The spatial structure of the steam distribution pipe can be Rectify the steam so that the steam is evenly distributed to the condensing end, improve the overall heat dissipation capacity of the condensing end, and make the condensate evenly flow back to the evaporating end, improving the uniformity of the thermal state and flow state of the working medium in the evaporating end; The condensing end set on the steam pipe can be arranged in 1-3 rows according to the situation, which can meet the greater heat dissipation needs; the straight finned tube is formed by integral extrusion or integral stretching, and there is no contact thermal resistance of the sleeved finned tube. , strong heat transfer ability. The straight finned tubes are arranged vertically outside the shell of the electromagnetic iron remover, which is convenient for natural convection to dissipate heat and avoid power and unstable factors caused by power. The evaporation channels are integrally extruded or integrally stretched, with low cost and strong pressure bearing capacity. Compared with the radiator composed of independent multiple heat pipes, the plate-type integral heat pipe has stronger heat dissipation capacity, better temperature uniformity effect, higher processing and installation efficiency, and lower production cost.

Description of drawings

Accompanying drawing 1 is the front view of embodiment 1 of the present invention.

Accompanying drawing 2 is the top view of accompanying drawing 1.

Accompanying drawing 3 is the enlarged view of I of accompanying drawing 2.

Accompanying drawing 4 is the enlarged view of II in accompanying drawing 2.

Accompanying drawing 5 is the sectional view of A-A among accompanying drawing 2.

Accompanying drawing 6 is the structural representation of embodiment 2.

Accompanying drawing 7 is the structural representation of embodiment 3.

Accompanying drawing 8 is the structural representation of embodiment 4.

Accompanying drawing 9 is the schematic diagram of the use status of the plate-type integral heat pipe on the electromagnetic iron remover.

In the figure: 1-rectangular flat plate, 2-hollow ring, 3-steam distribution tube, 4-straight finned tube, 5-bent tube, 6-evaporation channel, 7-equilibrium tube, 8-coil, 9-iron core .

detailed description

Each specific embodiment will be described below in conjunction with the accompanying drawings. The examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. Various modifications to the present invention made by those skilled in the art after reading the content of the present invention also belong to the scope of the appended claims of the present invention.

Embodiment one

Referring to accompanying drawings 1, 2, 3, 4, 5, a kind of plate-type integral heat pipe for heat dissipation of electromagnetic iron remover, said plate-type integral heat pipe comprises a rectangular flat plate 1, and on said rectangular flat plate 1, evenly distributed with mutually parallel evaporation Channel 6, the evaporation channel 6 is between the upper and lower surfaces of the rectangular flat plate 1, and its axis is parallel to the upper and lower surfaces of the rectangular flat plate 1; The first side 10 in the direction extends and runs through the second side 11 parallel to the first side; a through hole 12 is arranged in the center of the rectangular plate 1, and the axis of the through hole 12 is perpendicular to the rectangular plate 1. ,lower surface;

A hollow ring 2 is provided on the circumference of the through hole 12, and the evaporation channel 6 passing through the circumference of the through hole 12 communicates with the inner cavity of the hollow ring 2;

The first side 10 and the second side 11 of the rectangular plate 1 are each provided with a steam distribution pipe 3, and the steam distribution pipe 3 is a hollow tube with both ends closed, and is located at the first side 10 and the second side. The evaporation channel port 13 on the side 11 communicates with the inner cavity of the steam distribution pipe 3 arranged on the corresponding side;

One row of cold end holes 14 is evenly arranged in the axial direction on each steam distribution pipe 3, and the straight finned tubes 4 are installed on the cold end holes 14;

In this embodiment, the thickness of the rectangular plate 1 is 20 mm;

In this embodiment, the cross-section of the vapor distribution pipe 3 of the evaporation channel is rectangular;

The cross-sectional area of the evaporation channel is 500mm ² ;

The cross-sectional area of the steam distribution pipe is 3 times of the cross-sectional area of the evaporation channel;

In this embodiment, the cross-section of the hollow ring or equalizing tube is rectangular, and the cross-sectional area of the hollow ring or equalizing tube is 1000 mm ² ;

In this embodiment, the straight finned tube 4 is connected to the steam distribution tube 3 through an elbow 5, and the straight finned tube 4 and the elbow 5 are welded into one;

In this embodiment, the angle α between the axis of the straight finned tube and the upper surface of the rectangular flat plate is: α=90°;

In this embodiment, the material of the rectangular flat plate, hollow ring, steam distribution pipe, equalizing pipe, straight finned pipe, and bent pipe is selected from aluminum alloy;

In this embodiment, the straight finned tube is formed by integral hot extrusion, and the upper end of the straight finned tube is closed;

In this embodiment, the evaporation channel is formed by hot stretching process;

In this embodiment, the working fluid is selected from acetone.

Embodiment two

Referring to accompanying drawing 6, in this embodiment, the plate-type integral heat pipe is cut into two monomers through the center of the through hole 12 on the longitudinal section parallel or perpendicular to the axis of the evaporation channel 6, and each monomer has an evaporation The cutout section of the channel port 13 is provided with an equalizing tube 7, one end of the equalizing tube 7 is closed, the other end communicates with the hollow ring 2, and its side communicates with the evaporation channel port 13 passing through the cutout section.

In this embodiment, the thickness of the rectangular plate is 30mm;

In this embodiment, the cross-section of the evaporation channel or steam distribution pipe is square;

The cross-sectional area of the evaporation channel is 1200mm ² ;

The cross-sectional area of the steam distribution pipe is 6 times the cross-sectional area of the evaporation channel;

In this embodiment, the cross-section of the hollow ring or equalizing tube is a square, and the cross-sectional area of the hollow ring or equalizing tube is 3000 mm ² ;

In this embodiment, the angle α between the axis of the straight finned tube and the upper surface of the rectangular flat plate is: α=80°;

In this embodiment, the material of the rectangular flat plate, the hollow ring, the steam distribution pipe, the equalizing pipe, the straight finned pipe and the curved pipe is selected from copper alloy;

In this embodiment, the straight finned tube is formed by integral thermal stretching, and the upper end of the straight finned tube is closed;

In this embodiment, the evaporation channel is formed by a hot extrusion process;

In this embodiment, the working medium is selected from deionized distilled water.

Embodiment Three

Referring to accompanying drawing 7, in this embodiment, the plate-type integral heat pipe is cut into 4 single pieces through the center of the through hole 12 on the longitudinal section parallel or perpendicular to the axis of the evaporation channel 6, and each single piece has an evaporation The cutout section of the channel port 13 is provided with an equalizing tube 7, one end of the equalizing tube 7 is closed, the other end communicates with the hollow ring 2, and its side communicates with the evaporation channel port 13 passing through the cutout section.

In this embodiment, the thickness of the rectangular plate is 50mm;

In this embodiment, the cross-section of the evaporation channel or steam distribution pipe is rectangular;

The cross-sectional area of the evaporation channel is 2000mm ² ;

The cross-sectional area of the steam distribution pipe is 9 times the cross-sectional area of the evaporation channel;

In this embodiment, the cross-section of the hollow ring or equalizing tube is rectangular, and the cross-sectional area of the hollow ring or equalizing tube is 4000 mm ² ;

In this embodiment, the angle α between the axis of the straight finned tube and the upper surface of the rectangular flat plate is: α=60°;

In this embodiment, the material of the rectangular flat plate, hollow ring, steam distribution pipe, equalizing pipe, straight finned pipe, and bent pipe is selected from aluminum alloy;

In this embodiment, the straight finned tube is formed by integral hot extrusion, and the upper end of the straight finned tube is closed;

In this embodiment, the evaporation channel is formed by hot stretching process;

In this embodiment, the working fluid is selected from ethanol.

Embodiment Four

Referring to Fig. 8 , this embodiment shows a structure in which two rows of cold end holes 14 are arranged on the steam distribution pipe 3, and straight finned tubes 4 are installed on the cold end holes 14.

Claims (10)

1. a kind of board-like integral heat pipe of electric magnetic iron remover heat transmission, the board-like integral heat pipe, including a rectangular flat, its feature It is：

It is evenly equipped with the evaporation conduit being parallel to each other on the rectangular flat, the evaporation conduit is on the rectangular flat, Between lower surface, its diameter parallel is in the upper and lower surface of the rectangular flat；It is described to evaporate conduit from the rectangular flat thickness side To first side extend through the second side parallel with the first side；

A through hole is provided with the rectangular flat center, the axis of the through hole is perpendicular to the upper and lower surface of the rectangular flat； The circumference of the through hole is provided with a cavity ring, through the inner space for evaporating conduit and the cavity ring of through hole circumference；

Sub-steam pipe is respectively provided with the first side and second side of the rectangular flat, the sub-steam pipe is closed at both ends Hollow pipe, the evaporation conduit port in the first side and second side connects with the sub-steam pipe inner chamber for being arranged at respective side It is logical；

The straight fins pipe with sub-steam pipe inner space is both provided with each sub-steam pipe.

2. a kind of board-like integral heat pipe of electric magnetic iron remover heat transmission according to claim 1, it is characterised in that：With parallel or Perpendicular to the vertical section of evaporation channel axis, cross the through hole center of circle and the board-like integral heat pipe is cut into 2 pieces or 4 pieces of monomers, The otch section in each piece of monomer with evaporation conduit sets equalizer line, the closing of described equalizer line one end, the other end with it is hollow Ring is connected, and its side connects with the evaporation conduit port for crossing otch section.

3. a kind of board-like integral heat pipe of electric magnetic iron remover heat transmission according to claim 1 and 2, it is characterised in that：It is described Rectangular flat thickness is 10-50mm.

4. a kind of board-like integral heat pipe of electric magnetic iron remover heat transmission according to claim 1 and 2, it is characterised in that：It is described The cross section of evaporation conduit or sub-steam pipe is the one kind in parallelogram, trapezoidal, regular hexagon, circle, ellipse；

The cross-sectional area of the evaporation conduit is 100~2500mm²；

The cross-sectional area of the sub-steam pipe is 1~12 times of the evaporation conduit cross-sectional area.

5. a kind of board-like integral heat pipe of electric magnetic iron remover heat transmission according to claim 2, it is characterised in that：It is described hollow The cross section of ring or equalizer line is rectangle, and cavity ring or equalizer line cross-sectional area are 100-5000mm²。

6. a kind of board-like integral heat pipe of electric magnetic iron remover heat transmission according to claim 1 and 2, it is characterised in that：It is described Straight fins pipe is connected in sub-steam pipe by bend pipe, and the straight fins pipe is integral with elbow pipe welding.

7. a kind of board-like integral heat pipe of electric magnetic iron remover heat transmission according to claim 6, it is characterised in that：In sub-steam pipe On be uniformly arranged 1-3 row cold ends hole vertically, the straight fins pipe is arranged on cold end hole.

8. a kind of board-like integral heat pipe of electric magnetic iron remover heat transmission according to claim 1 and 2, it is characterised in that：It is described The axis of straight fins pipe is with the angle α of the rectangular flat upper surface：30°≤α≤90°.

9. a kind of board-like integral heat pipe of electric magnetic iron remover heat transmission according to claim 2, it is characterised in that：The rectangle Flat board, cavity ring, sub-steam pipe, equalizer line, the material of straight fins pipe are selected from aluminium alloy or copper alloy.

10. a kind of board-like integral heat pipe of electric magnetic iron remover heat transmission according to claim 1 and 2, it is characterised in that：It is described Evaporation conduit or straight fins pipe are using stretching or hot extrusion technique shaping, straight fins pipe upper end closed.