Furnace door heating device

Abstract

The utility model relates to the field of pressure sintering furnaces, and discloses a furnace door heating device which comprises a three-phase electrifying device, three electrodes and a heating plate, a furnace door comprises a furnace door inner side facing a furnace body and a furnace door outer side back to the furnace body, and the three-phase electrifying device is arranged on the furnace door outer side and used for being connected with a three-phase power supply; the three electrodes penetrate through the furnace door, are arranged on the furnace door and are connected with the three-phase electrifying device; the heating plate is arranged on the inner side of the furnace door and connected with the three electrodes. The furnace door heating device provided by the utility model can solve the problem of how to improve the power utilization safety of the furnace door heating device.

Description

Technical Field

[0001] The utility model relates to the field of pressure sintering furnaces, in particular to a furnace door heating device. Background Art

[0002] The uniformity of temperature distribution is very important for the sintering process of products. The smaller the temperature deviation at various locations in the sintering furnace, the smaller the deviation of the size and physical properties of the sintered products, the higher the product qualification rate, and the higher the production efficiency. However, the heating device of the traditional pressure sintering furnace is generally only set on the furnace body, which causes the temperature on the side close to the furnace door of the pressure sintering furnace to be lower than the side away from the furnace door, resulting in uneven temperature in the furnace, which in turn causes the products on the side close to the furnace door of the pressure sintering furnace to be undercooked or the products do not achieve the expected effect, resulting in a low yield rate.

[0003] To this end, the prior art provides a furnace door heating device, which includes a serpentine tubular heater installed on the inner side of the furnace door, and the serpentine tubular heater is used to heat the furnace door to compensate for the heat at the furnace door entrance, so as to ensure that the temperature of the material at the furnace door entrance is consistent with the temperature at other positions in the furnace, thereby ensuring the quality of the material. However, the serpentine tubular heater uses two-phase electricity to achieve heating, which cannot be applied to the industrial three-phase electricity environment, resulting in unstable power supply when the furnace door heating device is used, which greatly affects the power safety of the furnace door heating device. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model provides a furnace door heating device, which can at least solve the technical problem of how to improve the power safety of the furnace door heating device.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a furnace door heating device, the furnace door includes an inner side of the furnace door facing the furnace body and an outer side of the furnace door facing away from the furnace body, the furnace door heating device includes:

[0008] Three-phase power connection device, installed on the outside of the furnace door, used to connect to the three-phase power supply;

[0009] Three electrodes are installed on the furnace door and connected to the three-phase power connection device;

[0010] The heating plate is arranged on the inner side of the furnace door, and the heating plate is connected to three electrodes.

[0011] It is further arranged that the aforementioned heating plate is located at the center of the inner side of the furnace door and is bilaterally symmetrical, and the bottom of the heating plate is connected to three electrodes; the three electrodes are arranged at equal intervals on the same horizontal plane and have the same heating power.

[0012] It is further configured that the aforementioned heating plate includes three first connecting blocks, one second connecting block and at least three heating blocks equally spaced in the horizontal direction, each first connecting block is connected to an electrode and each is connected to the bottom end of the same number of heating blocks, the heating blocks are symmetrical up and down, and the second connecting block is connected to the top end of each heating block.

[0013] It is further configured that the aforementioned first connecting block includes a horizontal extension part and a vertical extension part. The horizontal extension part and the second connecting block are arranged in parallel. The horizontal extension part is connected to the bottom end of the heating block, and the vertical extension part is vertically connected to the middle position of the horizontal extension part and is also connected to the electrode.

[0014] It is further provided that the thermal efficiency of the aforementioned heating block is not lower than the thermal efficiency of the first connecting block and the second connecting block.

[0015] It is further provided that at least three guide recesses are evenly spaced on the aforementioned second connecting block, the guide recesses are extended in the vertical direction and are matched with the top clearance of the heating block.

[0016] It is further provided that a reinforcement structure is provided between the aforementioned heating plate and the furnace door, and the reinforcement structure is used to fix the heating plate and the furnace door and make the heating plate be located in a vertical plane.

[0017] It is further configured that the aforementioned reinforcement structure includes an insulating rod and a mounting seat, the mounting seat is fixed on the furnace door, the insulating rod is arranged parallel to the electrode, one end of the insulating rod is connected to the heating plate, and the other end is connected to the mounting seat, and is moved relative to the mounting seat along the electrode axis.

[0018] It is further provided that the aforementioned three-phase power connection device includes three conductive connectors connected to the electrodes, and the three conductive connectors are used to connect to a three-phase power supply.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the furnace door heating device provided by the utility model has the following beneficial effects:

[0021] The furnace door heating device provided by the utility model can be connected to industrial three-phase electricity through a three-phase power connection device and three electrodes. The three-phase electricity is more stable than the two-phase electricity, and can more effectively improve the electricity safety of the furnace door heating device, so that the furnace door heating device has the advantages of fast heating speed, high efficiency, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a stereoscopic diagram of the furnace door heating device and the furnace door in the embodiment from a first viewing angle;

[0023] Figure 2 is a stereoscopic diagram of the furnace door heating device and the furnace door in the embodiment from a second viewing angle;

[0024] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0025] Figure 4 2 is a cross-sectional view of a furnace door heating device and a furnace door in an embodiment.

[0026] Figure Number:

[0027] 1. Furnace door; 11. Inner side of furnace door; 12. Outer side of furnace door; 13. Double-layer shell; 14. Insulation door; 15. Insulation chamber;

[0028] 2. Three-phase power connection device; 21. Conductive connector;

[0029] 3. Electrode;

[0030] 4. Heating plate; 41. First connecting block; 411. Horizontal extension; 412. Vertical extension; 42. Second connecting block; 421. Guide recess; 43. Heating block;

[0031] 5. Reinforcement structure; 51. Insulation rod; 52. Mounting seat. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] The utility model provides a furnace door heating device, which is used to solve the problem of how to improve the power safety of the furnace door heating device.

[0034] See also Figure 1 As shown, Figure 1 1 is a stereoscopic diagram of the furnace door heating device and the furnace door in the embodiment from a first viewing angle. The furnace door heating device includes a three-phase power connection device 2 , an electrode 3 and a heating plate 4 .

[0035] The furnace door 1 comprises a furnace door inner side 11 facing the furnace body and a furnace door outer side 12 facing away from the furnace body.

[0036] The three-phase power connection device 2 is installed on the outer side 12 of the furnace door and is used to connect to a three-phase power supply.

[0037] There are three electrodes 3 , which penetrate the furnace door 1 and can be fixed on the furnace door 1 by welding or flange, and one end of the electrode 3 is connected to the three-phase power connection device 2 .

[0038] The heating plate 4 is installed on the inner side 11 of the furnace door, and the heating plate 4 is connected to the three electrodes 3 .

[0039] When the furnace door heating device of the above technical solution is used, the three-phase power connection device 2 is connected to an external three-phase power supply to energize the three electrodes 3, and the electrodes 3 transmit the current to the heating plate 4, so that the heating plate 4 is energized to generate heat, thereby independently heating the door 1 of the pressure sintering furnace and compensating for the temperature at the door 1 of the pressure sintering furnace. The furnace door heating device can be connected to industrial three-phase electricity through the cooperation of the three-phase power connection device 2 and the three electrodes 3. The three-phase electricity is more stable than the two-phase electricity, and can more effectively improve the electricity safety of the furnace door heating device, so that the furnace door heating device has the advantages of fast heating speed, high efficiency, safety and reliability.

[0040] See also Figure 1 As shown, the heating plate 4 is located at the center of the inner side 11 of the furnace door and is bilaterally symmetrical, and the bottom of the heating plate 4 is connected to three electrodes 3. The three electrodes 3 are evenly spaced and distributed on the same horizontal plane, and the heating power of the three electrodes 3 is the same. In this way, the furnace door heating device can effectively reduce the temperature difference between the upper and lower areas at the entrance of the furnace door 1 of the pressure sintering furnace by arranging the electrodes 3 in the lower area of ​​the entrance of the furnace door 1, and can also ensure that the temperature of the left and right areas at the entrance of the furnace door 1 is the same through the bilaterally symmetrical heating plate 4 and the equally spaced electrodes 3, thereby improving the temperature uniformity at the entrance of the furnace door 1 of the pressure sintering furnace, and then improving the yield rate of the sintered product.

[0041] See also Figure 2 As shown, Figure 2 4 is a stereoscopic diagram of the furnace door heating device and the furnace door in the embodiment from a second perspective. In one embodiment of the heating plate 4, the heating plate 4 includes three first connection blocks 41, one second connection block 42 and at least three heating blocks 43 distributed at equal intervals in the horizontal direction. Each first connection block 41 can be fastened to an electrode 3 by screws, and each first connection block 41 can also be fixedly connected to the bottom of the same number of heating blocks 43 by screws. The heating blocks 43 are symmetrical up and down, and the second connection block 42 can be fixedly connected to the top of each heating block 43 by screws. In this way, each electrode 3 transfers current to the same number of heating blocks 43 through the first connection block 41, and then transfers current to other heating blocks 43 through the second connection block 42, and is connected with the other two electrodes 3 to form a three-phase heating circuit, wherein the more the number of heating blocks 43, the faster the heating speed of the heating plate 4, and the higher the efficiency, and the heating blocks 43 are distributed at equal intervals, and the number of heating blocks 43 directly connected to each electrode 3 through the first connection block 41 is the same, so that the thermal efficiency of each heating block 43 can be ensured to be the same, and the temperature uniformity of the pressure sintering furnace can be effectively improved.

[0042] The first connecting block 41, the second connecting block 42 and the heating block 43 are all made of conductive materials, and the thermal efficiency of the heating block 43 is not lower than that of the first connecting block 41 and the second connecting block 42 to avoid affecting the temperature uniformity of the pressure sintering furnace.

[0043] In this embodiment, there are six heating blocks 43 , and each first connecting block 41 connects the bottom ends of two heating blocks 43 .

[0044] See also Figure 2 As shown, in one embodiment of the first connection block 41, the first connection block 41 includes a horizontal extension portion 411 and a vertical extension portion 412. The horizontal extension portion 411 and the second connection block 42 are distributed in parallel, and both extend in the horizontal direction. The horizontal extension portion 411 is connected to the bottom end of the heating block 43, and the vertical extension portion 412 extends in the vertical direction and is vertically connected to the middle position of the horizontal extension portion 411. The vertical extension portion 412 is also connected to the electrode 3. In this way, the first connection block 41 is connected to the heating block 43 through the horizontal extension portion 411, and is connected to the electrode 3 through the vertical extension portion 412, which can avoid interference between the connection of the electrode 3 and the connection of the heating block 43, and ensure that the current of each heating block 43 connected to the same first connection block 41 is more balanced, thereby increasing the service life of the heating block 43 and making the heating plate 4 heat more evenly as a whole.

[0045] See also Figure 3 As shown, Figure 3 for Figure 2 In the enlarged schematic diagram at A in the middle, based on the above embodiment, at least three guide recesses 421 are evenly spaced on the second connection block 42, and the guide recesses 421 extend in the vertical direction and are matched with the top clearance of the heating block 43. In this way, the guide recesses 421 can guide the installation position of the heating block 43 and the second connection block 42, facilitating the rapid installation of the heating block 43 and the second connection block 42, thereby improving the installation convenience and efficiency of the heating plate 4, and ensuring that the heating blocks 43 after installation are evenly spaced in the horizontal direction.

[0046] In this embodiment, the number of the guide recesses 421 is the same as the number of the heating blocks 43 , that is, six.

[0047] See also Figure 2 As shown, there is a reinforcement structure 5 between the heating plate 4 and the furnace door 1, and the reinforcement structure 5 is used to fix the heating plate 4 and the furnace door 1, and make the heating plate 4 located in a vertical plane. In this way, the reinforcement structure 5 can cooperate with the electrode 3 to fix the heating plate 4 and the furnace door 1, play a role in further stabilizing the position of the heating plate 4, and can also make the heating plate 4 as a whole located in a vertical plane, effectively improving the temperature uniformity of the pressure sintering furnace.

[0048] See also Figure 2 and Figure 3 As shown, in one embodiment of the reinforcement structure 5, the reinforcement structure 5 includes an insulating rod 51 and a mounting seat 52, the mounting seat 52 can be fixedly mounted on the furnace door 1 by welding or screwing, the insulating rod 51 is distributed in parallel with the electrode 3, and one end of the insulating rod 51 can be fixedly connected to the heating plate 4 by welding or screwing, and the other end of the insulating rod 51 is connected to the mounting seat 52, and is displaced relative to the mounting seat 52 along the axial direction of the electrode 3. In this way, by moving the insulating rod 51 relative to the mounting seat 52, the heating plate 4 can be driven to move accordingly, so that the position of the heating plate 4 can be adjusted so that the heating plate 4 is located in a vertical plane as a whole, effectively improving the temperature uniformity of the pressure sintering furnace.

[0049] In this embodiment, one end of the insulating rod 51 is screwed to the heating plate 4 , and the other end passes through the mounting seat 52 and is tightly connected to the mounting seat 52 by bolts, thereby fixing the insulating rod 51 and the mounting seat 52 to fix the position of the heating plate 4 .

[0050] See also Figure 4 As shown, Figure 4 : is a cross-sectional view of the furnace door heating device and the furnace door in the embodiment. In one embodiment of the three-phase power connection device 2, the three-phase power connection device 2 includes three conductive connectors 21, one end of the three conductive connectors 21 is connected to the three electrodes 3, and the other end of the three conductive connectors 21 is used to connect the three-phase power supply. In this way, the furnace door heating device can be directly connected to the three-phase power supply through the three-phase power connection device 2, which effectively ensures the power safety of the furnace door heating device.

[0051] See also Figure 4 As shown, in one embodiment of the furnace door 1, the furnace door 1 further includes a double-layer shell 13 and a heat-insulating door 14. A heat-insulating cavity 15 is provided between the double-layer shells 13. The heat-insulating cavity 15 can be filled with a heat-insulating layer (not shown in the figure). The heat-insulating door 14 is installed on the inner side of the double-layer shell 13, and the heating plate 4 is installed on the side of the heat-insulating door 14 facing the furnace body. In this way, the double-layer shell 13 and the heat-insulating door 14 can effectively ensure the heat-insulating effect of the pressure sintering furnace, effectively reduce the temperature loss at the entrance of the furnace door 1 and in the furnace body, and the heat-insulating layer in the heat-insulating cavity 15 can further improve the heat-insulating effect of the pressure sintering furnace.

[0052] The above-mentioned thermal insulation layer can be made of thermal insulation materials such as thermal insulation cotton.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A furnace door heating device, the furnace door comprising an inner side of the furnace door facing the furnace body and an outer side of the furnace door facing away from the furnace body, characterized in that: The furnace door heating device comprises: A three-phase power connection device, installed on the outside of the furnace door, used to connect to a three-phase power supply; Three electrodes, which penetrate and are arranged on the furnace door and are connected to the three-phase power connection device; A heating plate is arranged on the inner side of the furnace door, and the heating plate is connected to the three electrodes.

2. A furnace door heating device according to claim 1, characterized in that: The heating plate is located at the center of the inner side of the furnace door and is bilaterally symmetrical. The bottom of the heating plate is connected to the three electrodes. The three electrodes are arranged at equal intervals on the same horizontal plane and have the same heating power.

3. A furnace door heating device according to claim 2, characterized in that: The heating plate includes three first connecting blocks, one second connecting block and at least three heating blocks equally spaced in the horizontal direction, each of the first connecting blocks is connected to one of the electrodes and each is connected to the bottom ends of the same number of the heating blocks, the heating blocks are symmetrical up and down, and the second connecting blocks are connected to the top ends of each of the heating blocks.

4. A furnace door heating device according to claim 3, characterized in that: The first connecting block includes a horizontal extension part and a vertical extension part. The horizontal extension part and the second connecting block are arranged in parallel. The horizontal extension part is connected to the bottom end of the heating block. The vertical extension part is vertically connected to the middle position of the horizontal extension part and is also connected to the electrode.

5. The furnace door heating device according to claim 3, characterized in that: The thermal efficiency of the heating block is not lower than the thermal efficiency of the first connecting block and the second connecting block.

6. The furnace door heating device according to claim 3, characterized in that: At least three guide recesses are evenly spaced on the second connection block. The guide recesses are extended in the vertical direction and are gap-matched with the top end of the heating block.

7. The furnace door heating device according to claim 1, characterized in that: A reinforcement structure is provided between the heating plate and the furnace door, and the reinforcement structure is used to fix the heating plate and the furnace door and make the heating plate be located in a vertical plane.

8. The furnace door heating device according to claim 7, characterized in that: The reinforcement structure includes an insulating rod and a mounting seat, wherein the mounting seat is fixed on the furnace door, the insulating rod is arranged parallel to the electrode, one end of the insulating rod is connected to the heating plate, and the other end is connected to the mounting seat, and is displaced relative to the mounting seat along the axis of the electrode.

9. The furnace door heating device according to claim 1, characterized in that: The three-phase power connection device includes three conductive connectors connected to the electrodes, and the three conductive connectors are used to connect to a three-phase power supply.

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