CN210636029U - High magnetic induction low iron loss silicon steel is bell-type furnace for annealing - Google Patents
High magnetic induction low iron loss silicon steel is bell-type furnace for annealing Download PDFInfo
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- CN210636029U CN210636029U CN201920942871.3U CN201920942871U CN210636029U CN 210636029 U CN210636029 U CN 210636029U CN 201920942871 U CN201920942871 U CN 201920942871U CN 210636029 U CN210636029 U CN 210636029U
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Abstract
The utility model discloses a high magnetic induction low iron loss bell-type furnace for silicon steel annealing, which comprises a furnace platform and a furnace bottom plate, wherein a resistance belt in the furnace platform, leading-out bars arranged in the perforation of the furnace platform and the furnace bottom plate, and cables below the furnace bottom plate are connected in sequence; the electrode seat is fixedly connected with the furnace bottom plate; the leading-out rod is arranged in the central through holes of the electrode base and the electrode cover in a penetrating way; an insulating sealing component is arranged between the leading-out rod and the electrode seat and between the leading-out rod and the electrode cover. The high-magnetic-induction low-iron-loss bell-type furnace is provided with the electrode seat and the electrode cover, the insulating sealing assembly is arranged between the lead-out rod and the electrode seat as well as between the lead-out rod and the electrode cover, and the top end of the electrode seat is arranged between the lead-out rod and the furnace bottom plate, so that the defect that the lead-out rod is directly bonded with the furnace bottom plate under the heated condition is overcome, and the failure rate is reduced.
Description
Technical Field
The utility model relates to a steel band is rolled up annealing equipment technical field, concretely relates to high magnetic induction low iron loss silicon steel is bell-type furnace for annealing.
Background
The annealing process of the high-magnetic-induction low-iron-loss silicon steel is mainly completed in a bell-type furnace. The cost-saving structure of the bell-type furnace mainly comprises an outer cover, an inner cover, a furnace platform, a furnace bottom plate, a heating element and a protective gas introducing assembly, wherein the heating element and the protective gas introducing assembly are arranged in the furnace platform.
The commonly used heating element is a resistance band coiled in a groove of the furnace platform, and the resistance band is connected with a cable at the furnace bottom through a leading-out rod. The installation structure of the leading-out rod in the furnace body is as follows: the extraction rod is vertically inserted into an assembly hole of the furnace platform, and asbestos materials are filled between the extraction rod and the wall of the assembly hole, so that the extraction rod is prevented from loosening and swinging, and high-temperature gas in the furnace is prevented from entering the assembly hole. The connection structure of the leading-out rod and the furnace bottom cable is as follows: the furnace bottom plate is provided with a lead-through hole, the bottom surface of the furnace bottom plate is welded with a cylindrical electrode seat communicated with the lead-through hole, the bottom end of the electrode seat is connected with an insulating sheath, a lead-out rod penetrates through the insulating sheath, the bottom end of the lead-out rod is positioned below the insulating sheath, the bottom end of the lead-out rod is connected with an upper nut and a lower nut in a threaded manner, a through hole of a wiring nose is sleeved on the lead-out rod and is arranged between the upper nut and the lower nut in a pressing manner, and an asbestos packing and bakelite which are. And under the condition that the asbestos material, the bakelite and the asbestos packing are tightly filled, the bottom end temperature of the leading-out rod is 50-60 ℃.
The technical problems that the rod is led out from the heating assembly in actual production can be as follows: firstly, due to the fact that the furnace body is high in temperature for a long time, after long-time use, asbestos materials are inevitably pulverized to form gaps, air pressure in a heat treatment cavity is positive pressure, high-temperature reducing gas easily penetrates through the gaps to the bottom end of an extraction rod, the temperature around the extraction rod, an electrode seat and a furnace bottom plate assembly hole is increased, and the highest temperature can reach more than 170 ℃; the material of the extraction rod is different from that of the furnace bottom plate, the furnace bottom plate is heated to expand into the hole, the outer diameter of the extraction rod is increased, and the extraction rod and the furnace bottom plate are easy to form bonding to cause tripping of a furnace platform; secondly, rubber in the asbestos packing is aged due to continuous temperature rise of the lead-out rod, the connection of the insulating sheath is unstable, and the temperature of the connection part of the lead-out rod and the connection lug is further increased; thirdly, the brittleness of the leading-out rod in a heating state is obviously increased, and the leading-out rod is easily broken due to the fact that the cable joint connected with the wiring lug has large self weight.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that exists among the prior art, provide a low iron loss silicon steel of high magnetic induction cover furnace for annealing, above-mentioned heating element stable in structure, heating device fault rate is low.
Realize above-mentioned technological effect, the utility model discloses a technical scheme does: the bell-type furnace for annealing the silicon steel with high magnetic induction and low iron loss comprises a furnace platform and a furnace bottom plate, wherein a resistance band in the furnace platform, a leading-out rod penetrating through holes of the furnace platform and the furnace bottom plate and a cable below the furnace bottom plate are sequentially connected; the electrode seat is fixedly connected with the furnace bottom plate; the leading-out rod is arranged in the central through holes of the electrode base and the electrode cover in a penetrating way; and an insulating sealing component is arranged among the leading-out rod, the electrode seat and the electrode cover.
The preferred technical scheme is that the insulating sealing assembly comprises a sealing ring and a pressing block located below the sealing ring, the leading-out rod is arranged in a central through hole of the sealing ring and the pressing block in a penetrating mode, the pressing block comprises a jacking section and a flange section arranged below the jacking section, the jacking section is in jacking pressing with the sealing ring in the central through hole of the electrode holder, and the flange section is arranged between the bottom surface of the electrode holder and the cover surface of the electrode cover.
The preferred technical scheme is that the sealing ring comprises a positioning layer ring, the bottom end of the central through hole of the electrode seat comprises a first hole section and a second hole section positioned below the first hole section, the aperture of the first hole section is smaller than that of the second hole section, the first sealing section of the positioning layer ring is matched with the first hole section, and the second sealing section of the positioning layer ring is matched with the second hole section;
the binding surfaces of the positioning layer ring and the pressing block are provided with an annular flaring groove and a convex ring which are matched with each other; or a jacking layer ring is arranged between the positioning layer ring and the pressing block, and the binding surface of the positioning layer ring and the jacking layer ring is provided with an annular flaring groove and a convex ring which are matched with each other; the convex ring comprises an inserting section and an extending section, wherein the annular surface of the inserting section is in smooth transition, the inserting section is arranged in the annular flaring groove in a matching mode, and an extrusion interval is arranged between the groove bottom of the annular flaring groove and the inserting section.
The preferred technical scheme does, the sealing washer includes that at least two layer circles, is provided with matched with annular flaring groove and bulge loop on the range upon range of layer circle binding face from top to bottom, the bulge loop includes anchor ring smooth transition's grafting section and extension, and the grafting section cooperation sets up in the annular flaring groove, the tank bottom in annular flaring groove with be provided with the extrusion interval between the grafting section.
The preferable technical scheme is that the sealing ring comprises at least three layers of rings, and the inner diameter of the ring in the middle layer is smaller than that of the ring in the bottom layer.
The press block further comprises an extension section positioned below the flange section, and the extension section is clamped between the leading-out rod and the hole wall of the central through hole of the electrode cover.
The preferable technical scheme is that the circumferential inner edge of the pressing block is in clearance fit with the leading-out rod, and the circumferential outer edge of the pressing block is in clearance fit with the electrode seat and the electrode cover.
The utility model has the advantages and the beneficial effects that:
the high-magnetic-induction low-iron-loss bell-type furnace is provided with the electrode seat and the electrode cover, the insulating sealing assembly is arranged between the lead-out rod and the electrode seat as well as between the lead-out rod and the electrode cover, and the top end of the electrode seat is arranged between the lead-out rod and the furnace bottom plate, so that the defect that the lead-out rod is directly bonded with the furnace bottom plate under the heated condition is overcome, and the equipment failure rate is reduced.
Drawings
FIG. 1 is a schematic structural view of an embodiment 1 of a bell-type furnace for annealing silicon steel with high magnetic induction and low iron loss according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic view showing a connection structure of the electrode holder, the electrode cap, the seal assembly and the extraction rod in example 1;
FIG. 4 is a schematic view showing a connecting mechanism of the electrode holder and the electrode cap in example 1;
FIG. 5 is a schematic view showing a coupling structure of a seal assembly and a lead-out bar in example 1;
FIG. 6 is a schematic view showing a connection structure of the electrode holder, the electrode cap, the seal assembly and the extraction rod in example 2;
FIG. 7 is a schematic view showing the connection structure of the electrode holder, the electrode cap, the seal assembly and the extraction rod in example 3;
in the figure: 1. a furnace platform; 2. a furnace floor; 3. a resistance band; 31. blind holes; 32. a recessed portion; 4. leading out a rod; 5. a cable; 51. a wire connecting nose; 6. an electrode holder; 61. a first bore section; 62. a second bore section; 7. an electrode cap;
8. an insulating seal assembly; 81. positioning the layer ring; 811. a first seal section; 812. a second seal section; 82. briquetting; 821. a top pressing section; 822. a flange section; 823. an extension section; 83. the layers are layered on the top; 84. a middle layer ring; 85. winding the lower layer;
9. a semi-elliptical slot; 10. a convex ring; 101. a plug section; 102. an extension section; 11. and a V-shaped groove.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the bell-type furnace structure, the terms of the upper and lower positional relationships such as "upper", "lower", "top", "bottom", "top", "upper", "lower", "upper and lower stacking" are used with reference to the normal use state of the bell-type furnace.
Electrode holder and electrode cover
One of the functions of the electrode seat and the electrode cover is to isolate the leading-out rod from the furnace bottom plate, and the other function of the electrode seat is to obstruct the reducing gas in the heat treatment cavity from going downwards, so that the problem that the temperature of the connecting part of the leading-out rod and the cable is increased due to the heat conduction of the reducing gas is avoided. The electrode holder and the electrode cover are usually connected by screw threads. The electrode base and the motor cover are made of chromium zirconium copper. Because the electrode seat and the furnace bottom plate need to be connected in a sealing way, the common fixed connection mode is welding. Under the normal working state, a gap exists between the electrode seat and the leading-out rod, and the electrode seat and the leading-out rod are not in direct contact.
Insulating seal assembly
The principle of the insulating sealing assembly is that the pressure is applied to the sealing ring by the pressure block to cause the deformation of the sealing ring, the inner edge of the deformed sealing ring is pressed against the leading-out rod, and the outer edge of the deformed sealing ring is pressed against the inner surface of the electrode base to form an air-blocking and pressing structure, so that the relative position between the electrode base and the leading-out rod is stable, and the iron connection problem between the leading-out rod and the electrode base is avoided.
The material of sealing washer and briquetting needs to satisfy the temperature resistant requirement, and the temperature resistant range is more than 200 ℃ usually, and in addition, the sealing washer still need have a small scale deformability in the temperature resistant range, and preferably, the sealing washer is the polytetrafluoroethylene material, the briquetting is ceramic material, and further, the ceramic material of briquetting is high strength ceramic.
Positioning layer ring of sealing ring
The first sealing section of the positioning layer ring is matched with the first hole section, specifically, the first sealing section is clamped between the leading-out rod and the hole wall of the first hole section of the electrode holder, and further, a gap exists between the circumferential outer surface of the positioning layer ring and the hole wall of the first hole section.
The bottom surface of the positioning layer ring is provided with an annular flaring groove, the top surface of the pressing block or the top pressing layer ring below the positioning layer ring is provided with a convex ring, and an extrusion interval is arranged between the bottom of the annular flaring groove and the top of the convex ring. In the structure, the pressing block is pressed by the electrode cap, the pressing block or the pressing layer ring applies acting force to the positioning layer ring, the interaction force between the groove wall outside the annular flaring groove of the positioning layer ring and the inner surface of the electrode seat is increased, and the gap is reduced or sealed; the interaction force between the groove wall on the inner side of the annular flaring groove and the leading-out rod is increased, and the gap is reduced or sealed.
The clearance between the locating layer ring and the hole wall of the first hole section is more favorable for increasing the deformation degree of the groove wall on the inner side of the annular flaring groove.
The flaring groove is a groove body with a groove opening width larger than the groove bottom width, and comprises but is not limited to V shape, parabola shape, semicircle shape, semiellipse shape and trapezoid shape, and the extrusion interval between the groove bottom of the annular flaring groove and the top end of the convex ring is that the groove bottom of the annular flaring groove is not contacted with the top end of the convex ring.
The positions of the annular flaring groove and the convex ring can be interchanged, namely, the convex ring is arranged on the bottom surface of the positioning layer ring, and the annular flaring groove is arranged on the top surface of the pressing block or the top pressing layer ring, so that the sealing performance is not greatly influenced.
The height of the positioning layer ring and the size of the gap between the positioning layer ring and the first hole section and the lead-out rod are specifically determined according to the thermal deformation degree of the material affected by the temperature.
At least two layers of sealing rings
The sealing ring is formed by overlapping at least two layers of rings, and comprises but is not limited to the following two structures:
1. the layer circle of top layer and electrode holder shoulder roof pressure mutually, be planar or conical surface form's anchor ring contact between the two, the intermediate level circle of top layer circle below and the clearance of drawing forth the stick are less than top layer circle, play the sealed effect, and intermediate level circle below sets up briquetting or bottom layer circle, plays the top and presses the effect. The bottom surfaces of the top layer ring and the middle layer ring are provided with annular flaring grooves, and the middle layer ring and the gland are provided with convex rings, or the middle layer ring and the bottom layer ring are provided with convex rings.
2. Based on the laminated structure of the first layer ring, the structure of the layer ring of the top layer is the same as that of the positioning layer ring.
The positions of the annular flaring groove and the convex ring in the two schemes can be interchanged.
The number of the middle ring is increased, a multiple sealing structure can be formed, and the sealing performance is better.
Because the briquetting is ceramic material, the briquetting top sets up bulge loop or annular flaring groove, and the ceramic bulge loop that is arranged in annular flaring groove or annular flaring groove department receive the roof pressure, and the internal stress is concentrated, leads to bulge loop or annular flaring groove department damaged easily. Preferably, the sealing ring is formed by stacking at least three layers of rings up and down, and the contact surface between the pressing block and the bottom layer of ring is an annular plane.
Pressing section, extension section and flange section of pressing block
The end face of the top pressing section of the pressing block is directly contacted with the sealing ring; the extension section of the pressing block has the same function as the first sealing section of the positioning layer ring, the extension section of the pressing block is used for being clamped between the electrode cover and the leading-out rod, and the extension section of the pressing block is used for being clamped between the leading-out rod and the electrode seat and is used for positioning the leading-out rod. The flange section of the pressing block is used for transmitting the jacking acting force of the electrode cover, and the bottom surface of the jacking section of the pressing block is jacked with the cover surface of the electrode cover in an assembling state.
Example 1
As shown in fig. 1 to 5, the bell-type furnace for annealing silicon steel with high magnetic induction and low iron loss of example 1 includes a furnace platform 1 and a furnace bottom plate 2, a resistance band 3 in the furnace platform 1, a lead-out rod 4 penetrating through the through holes of the furnace platform 1 and the furnace bottom plate 2, and a cable 5 under the furnace bottom plate 2 are sequentially connected, and further includes an electrode holder 6 with a central through hole and an electrode cover 7, wherein the top end of the electrode holder 6 penetrates through the through hole, and the electrode cover 7 is covered at the bottom end of the electrode holder 6; the electrode seat 6 is fixedly connected with the furnace bottom plate 2; the leading-out rod 4 is arranged in the central through hole of the electrode base 6 and the electrode cover 7 in a penetrating way; an insulating sealing component 8 is arranged between the leading-out rod 4 and the electrode seat 6 and the electrode cover 7.
The insulating and sealing assembly 8 of embodiment 1 includes a positioning layer ring 81 and a pressing block 82, the lead-out rod 4 is inserted into the central through holes of the positioning layer ring 81 and the pressing block 82, the pressing block 82 includes a pressing section 821 and a flange section 822 arranged below the pressing section 821, the pressing section 821 is pressed against the sealing ring 81 in the central through hole of the electrode base 6, and the flange section 822 is arranged between the bottom surface of the electrode base 6 and the cover surface of the electrode cover 7.
In embodiment 1, the bottom end of the central through hole of the electrode holder 6 comprises a first hole section 61 and a second hole section 62 located below the first hole section 61, the aperture of the first hole section 61 is smaller than that of the second hole section 62, a first sealing section 811 of the positioning layer ring 81 is matched with the first hole section 61, and a second sealing section 812 of the positioning layer ring 81 is matched with the second hole section 62; the bottom surface of location layer circle 81 is provided with semiellipse circular groove 9, is provided with bulge loop 10 on the top surface of briquetting 82, and bulge loop 10 includes anchor section 101 and the extension section 102 of anchor ring smooth transition, and the cooperation of anchor section 101 sets up in semiellipse circular groove 9, is provided with the extrusion interval between the tank bottom of semiellipse circular groove 9 and the anchor section 101 top.
The circumferential inner edge of the pressing block 82 is in clearance fit with the leading-out rod 4, and the circumferential outer edge of the pressing block 82 is in clearance fit with the electrode holder 6 and the electrode cover 7.
Example 2
As shown in fig. 6, embodiment 2 is based on embodiment 1, and the difference is that the insulating and sealing assembly 8 includes three layers of rings and a pressing block 82 located below the rings, the three layers of rings are, from top to bottom, a top layer ring 83, a middle layer ring 84, and a lower layer ring 85, the top layer ring 83 and the bottom surface of the middle layer ring 84 are all provided with V-shaped grooves 11, convex rings 10 are provided on the top surfaces of the middle layer ring 84 and the bottom layer ring 85, the cross sections of the convex rings are trapezoidal, each convex ring 10 includes an insertion section 101 and an extension section 102, which have smooth transition of a ring surface, the insertion section 101 is disposed in the V-shaped grooves 11 in a matching manner, and an extrusion interval is provided between the bottom of the V-. The clearance between the inner edge surface of the middle layer ring 84 and the lead-out bar is smaller than that of the top layer ring 83 and the bottom layer ring 85. The top layer collar 83 is similar in construction to the positioning collar 81 of example 1, having a first sealing section 811.
Example 3
As shown in fig. 7, embodiment 3 is based on embodiment 2, and is different in that the pressing block 82 further includes an extension section 823 located below the flange section 822, and the extension section 823 is sandwiched between the extraction rod 4 and the wall of the central through hole of the electrode cap 7.
In examples 1 and 2, a sealing structure was formed, and when the reducing gas in the hearth 1 flowed into the electrode holder 6 via the pulverized asbestos gap, the positioning ring 81 in example 1 and the intermediate ring 84 in example 2 were sealingly disposed between the extraction rod 4 and the electrode holder 6, blocking the downward passage of the gas flow.
Through the improvement of the sealing component and the structure of the connection end of the leading-out rod cable, the temperature of the connection end of the leading-out rod cable is maintained below 100 ℃.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The bell-type furnace for annealing the silicon steel with high magnetic induction and low iron loss comprises a furnace platform and a furnace bottom plate, wherein a resistance band in the furnace platform, a leading-out rod penetrating through holes of the furnace platform and the furnace bottom plate and a cable below the furnace bottom plate are sequentially connected; the electrode seat is fixedly connected with the furnace bottom plate; the leading-out rod is arranged in the central through holes of the electrode base and the electrode cover in a penetrating way; and an insulating sealing component is arranged among the leading-out rod, the electrode seat and the electrode cover.
2. The bell-type furnace for annealing silicon steel with high magnetic induction and low iron loss as set forth in claim 1, wherein the insulating and sealing assembly comprises a sealing ring and a pressing block located below the sealing ring, the extraction rod is inserted into the central through hole of the sealing ring and the pressing block, the pressing block comprises a pressing section and a flange section disposed below the pressing section, the pressing section presses against the sealing ring in the central through hole of the electrode holder, and the flange section is disposed between the bottom surface of the electrode holder and the cover surface of the electrode cover.
3. The bell-type furnace for annealing silicon steel with high magnetic induction and low iron loss as claimed in claim 2, wherein the sealing ring comprises a positioning layer ring, the bottom end of the central through hole of the electrode holder comprises a first hole section and a second hole section positioned below the first hole section, the hole diameter of the first hole section is smaller than that of the second hole section, the first sealing section of the positioning layer ring is matched with the first hole section, and the second sealing section of the positioning layer ring is matched with the second hole section;
the binding surfaces of the positioning layer ring and the pressing block are provided with an annular flaring groove and a convex ring which are matched with each other; or a jacking layer ring is arranged between the positioning layer ring and the pressing block, and the binding surface of the positioning layer ring and the jacking layer ring is provided with an annular flaring groove and a convex ring which are matched with each other; the convex ring comprises an inserting section and an extending section, wherein the annular surface of the inserting section is in smooth transition, the inserting section is arranged in the annular flaring groove in a matching mode, and an extrusion interval is arranged between the groove bottom of the annular flaring groove and the inserting section.
4. The bell-type furnace for annealing silicon steel with high magnetic induction and low iron loss as claimed in claim 2, wherein the sealing ring comprises at least two layers of rings, the abutting surfaces of the upper and lower layers of rings are provided with an annular flaring groove and a convex ring which are matched, the convex ring comprises an insertion section and an extension section, the annular flaring groove is provided with a smooth transition, the insertion section is matched and arranged in the annular flaring groove, and an extrusion interval is arranged between the bottom of the annular flaring groove and the insertion section.
5. The bell type furnace for annealing of high magnetic induction low iron loss silicon steel as claimed in claim 4, wherein said seal ring comprises at least three layers of rings, and the inner diameter of said ring at the middle layer is smaller than that at the bottom layer.
6. The bell-type furnace for annealing silicon steel with high magnetic induction and low iron loss as claimed in claim 2, wherein the pressure block further comprises an extension section located below the flange section, and the extension section is sandwiched between the extraction rod and the wall of the central through hole of the electrode cover.
7. The bell-type furnace for annealing silicon steel with high magnetic induction and low iron loss as set forth in claim 2, wherein a circumferential inner edge of the press block is in clearance fit with the extraction rod, and a circumferential outer edge of the press block is in clearance fit with the electrode holder and the electrode cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920942871.3U CN210636029U (en) | 2019-06-21 | 2019-06-21 | High magnetic induction low iron loss silicon steel is bell-type furnace for annealing |
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| CN201920942871.3U CN210636029U (en) | 2019-06-21 | 2019-06-21 | High magnetic induction low iron loss silicon steel is bell-type furnace for annealing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241293A (en) * | 2019-06-21 | 2019-09-17 | 江阴森豪金属科技有限公司 | A kind of high-magnetic induction, low-iron loss annealing process of silicon steel bell furnace |
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2019
- 2019-06-21 CN CN201920942871.3U patent/CN210636029U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241293A (en) * | 2019-06-21 | 2019-09-17 | 江阴森豪金属科技有限公司 | A kind of high-magnetic induction, low-iron loss annealing process of silicon steel bell furnace |
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