Gas tunnel kiln for calcining lead titanate ceramic powder

Abstract

The utility model discloses a fuel gas tunnel kiln for calcining lead titanate ceramic powder, which comprises a heat insulation kiln body and a conveying structure, the conveying structure comprises a driven wheel, a driving wheel and a conveying chain which is rotatably connected with the driven wheel and the driving wheel, the conveying chain comprises a plurality of chain links which are connected end to end, a bearing plate is arranged on each chain link, and the fuel gas tunnel kiln further comprises a plurality of limiting pieces and a plurality of supporting rods, a plurality of limiting pieces are arranged on the bearing plate at intervals. In the calcining process of the lead titanate ceramic powder, the lead titanate ceramic powder is loaded into the box body structure, the box body structure is placed on the bearing plate and driven by the bearing plate to move slowly, and the box body structure is moved out of the heat insulation kiln body after being sintered in the heat insulation kiln body. The multiple limiting pieces are used for limiting the box body structure in the y-axis direction, and the stability of the box body structure is effectively improved. And the box body structure is prevented from shaking and even toppling under the action of vibration and slight impact. The continuous sintering of the lead titanate ceramic powder can be ensured, and the calcining safety is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of tunnel kilns, in particular to a gas tunnel kiln for calcining lead titanate ceramic powder. BACKGROUND

[0002] The lead titanate ceramic powder is loaded into the corresponding cartridge structure, the cartridge structure loaded with the lead titanate ceramic powder continuously enters the tunnel kiln, so that the lead titanate ceramic powder is subjected to solid-phase reaction at high temperature to synthesize lead titanate powder with a specific crystal structure.

[0003] In the prior art, the cartridge structure is stacked on a bearing plate, and the bearing plate drives the cartridge structure to enter the tunnel kiln. When the bearing plate drives the cartridge structure to move, the cartridge structure is subjected to vibration and slight impact. Although the tunnel kiln runs smoothly, the vibration and slight impact affect the stability of the cartridge structure, the cartridge structure may be shaken or even tilted under the action of the vibration and slight impact, thereby affecting the stability of the cartridge structure and being unfavorable for continuous sintering of the lead titanate ceramic powder.

[0004] Therefore, it is urgent to provide a gas tunnel kiln for calcining lead titanate ceramic powder to improve the stability of the cartridge structure. CONTENT OF THE INVENTION

[0005] The application provides a gas tunnel kiln for calcining lead titanate ceramic powder, which aims at solving the problem that, in the prior art, vibration and slight impact affect the stability of the cartridge structure, the cartridge structure may be shaken or even tilted under the action of the vibration and slight impact, thereby affecting the stability of the cartridge structure and being unfavorable for continuous sintering of the lead titanate ceramic powder.

[0006] To achieve the above object, the application provides a gas tunnel kiln for calcining lead titanate ceramic powder, which comprises a heat-insulating kiln body and a conveying structure, the conveying structure comprises a driven wheel, a driving wheel and a conveying chain connecting the driven wheel and the driving wheel, the conveying chain comprises a plurality of chain links connected end to end, and a bearing plate is arranged on each chain link, and the application further comprises a plurality of limiting members, which are arranged on the bearing plate in the y-axis direction.

[0007] In some embodiments, the limiting member comprises a plurality of limiting blocks, and the limiting blocks are arranged in the z-axis direction and connected by fasteners.

[0008] In some embodiments, the heat-insulating kiln body comprises a preheating section, a plurality of heating sections and a cooling section, and further comprises a plurality of branch gas pipes arranged on the heating sections, a total gas storage pipe connected to the branch gas pipes and a preheating pipe connected to the preheating section and the total gas storage pipe.

[0009] In some embodiments, further comprising: a preheating cover, the preheating cover is detachably arranged at the top of the preheating section, and the preheating pipe is communicated with the preheating pipe.

[0010] In some embodiments, further comprising: a closing door, the closing door is movably arranged in the preheating section, and the closing door is used for closing the preheating section.

[0011] In some embodiments, further comprising: a resting table, the resting table is arranged at one side of the preheating section.

[0012] The technical scheme of the present application provides a gas tunnel kiln for calcining lead titanate ceramic powder, which comprises a heat insulation kiln body and a conveying structure. The conveying structure comprises a driven wheel, a driving wheel and a conveying chain connecting the driven wheel and the driving wheel. The conveying chain comprises a plurality of chain links connected end to end. A bearing plate is arranged on each chain link. The gas tunnel kiln further comprises a plurality of limiting members arranged on the bearing plate in the y-axis direction. During the calcination of lead titanate ceramic powder, the lead titanate ceramic powder is loaded into the box body structure, which is placed on the bearing plate and slowly moves under the driving of the bearing plate. After sintering in the heat insulation kiln body, the box body structure is removed from the heat insulation kiln body. The plurality of limiting members limit the movement of the box body structure in the y-axis direction, effectively improving the stability of the box body structure. This avoids the shaking or even toppling of the box body structure under the action of vibration and slight impact, ensuring the continuous sintering of lead titanate ceramic powder and improving the safety of calcination. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 FIG. 1 is a perspective view of a gas tunnel kiln for calcining lead titanate ceramic powder according to an embodiment of the present application;

[0015] Figure 2 FIG. 2 is a partial enlarged view of part A in FIG. 1; Figure 1

[0016] Figure 3 FIG. 3 is a partial enlarged view of part B in FIG. 1; Figure 1

[0017] Figure 4 FIG. 4 is a structural schematic view of the bearing frame and the limiting member according to an embodiment of the present application;

[0018] Figure 5 FIG. 5 is a sectional view of part C-C in FIG. 1. Figure 4 ​​​

[0019] In the figure: heat insulation kiln body 1, preheating cover 2, sealing door 3, preheating pipe 4, air distribution pipe 5, total gas storage pipe 6, limiting block 7, driven wheel 8, resting table 9, bearing plate 10, rotary power source 11, connecting through hole 12, screw 13. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0021] Referring to Figure 1 , Figure 2 and Figure 3 , the present application proposes a gas tunnel kiln for calcining lead titanate ceramic powder, which comprises a heat insulation kiln body 1 and a conveying structure. The conveying structure comprises a driven wheel 8, a driving wheel, and a conveying chain connecting the driven wheel 8 and the driving wheel. The conveying chain comprises a plurality of chain links connected end to end. The chain links are provided with bearing plates 10. The gas tunnel kiln further comprises a plurality of limiting members. The limiting members are arranged on the bearing plates 10 in the y-axis direction.

[0022] The gas tunnel kiln is a sintering device suitable for industrial large-scale production. The cassette structure containing lead titanate ceramic powder can continuously enter the gas tunnel kiln to occur solid phase reaction and synthesize lead titanate powder with specific crystal structure.

[0023] The heat insulation kiln body 1 is the main structure of the gas tunnel kiln. A plurality of gas nozzles are arranged on the heat insulation kiln body 1 for heating the cassette structure containing lead titanate ceramic powder. The heat insulation kiln body 1 is a mature prior art and is not the core of the present application. Therefore, the specific structure of the heat insulation kiln body 1 is not limited herein.

[0024] The heat insulation kiln body 1 is provided with a conveying frame, and the driven wheels 8 and the driving wheels are rotatably installed on the conveying frame. The driven wheels 8 are preferably provided with two, and the driving wheels are also preferably provided with two, and the two driving wheels are connected by a driving shaft, and the driving shaft is also connected to the output shaft of the rotary power source 11 through a shaft coupling, and the driving wheels are driven to rotate by the rotary power source 11, and the two driven wheels 8 are connected by a driven shaft to ensure that the two driven wheels 8 can rotate synchronously, and one driving wheel and one driven wheel 8 are connected to a conveying chain, that is, the conveying chain includes two conveying chains arranged at intervals, one end of the carrying plate 10 is welded with a link of one conveying chain, and the other end of the carrying plate 10 is welded with a link of the other conveying chain, so as to improve the reliability of the carrying plate 10. Through the rotary motion of the conveying chain, the box body structure filled with lead titanate ceramic powder is continuously brought into the heat insulation kiln body 1, and the sintered box body structure is moved out of the heat insulation kiln body 1.

[0025] The plurality of limiting members are used to limit the box body structure in the y-axis direction, so as to avoid the box body structure from shaking or even toppling under the action of vibration and slight impact. Adjacent two limiting members can limit one box body structure, and a plurality of limiting members can limit a plurality of box body structures, so as to effectively improve the stability of the box body structure.

[0026] Specifically, in the process of calcining the lead titanate ceramic powder, the lead titanate ceramic powder is filled into the box body structure, the box body structure is placed on the carrying plate 10 and slowly moves under the driving of the carrying plate 10, and is moved out of the heat insulation kiln body 1 after sintering in the heat insulation kiln body 1. The plurality of limiting members are used to limit the box body structure in the y-axis direction, so as to effectively improve the stability of the box body structure. Avoid the box body structure from shaking or even toppling under the action of vibration and slight impact. Ensure that the sintering of the lead titanate ceramic powder can be continuously carried out, and improve the safety of the calcination.

[0027] Referring to Figure 1 , Figure 2 , Figure 4 and Figure 5 , in some embodiments, the limiting member includes a plurality of limiting blocks 7, and the plurality of limiting blocks 7 are stacked along the z-axis direction and connected by fasteners between adjacent two limiting blocks 7 along the z-axis direction. The limiting block 7 is provided with a connecting hole 12, and the bottommost limiting block 7 is installed on the carrying plate 10 by a screw 13, and adjacent two limiting blocks 7 are connected together by a screw 13. The number of limiting blocks 7 can be adjusted to adapt to the height of the box body structure, so as to effectively limit the box body structure and improve the stability of the box body structure.

[0028] Referring to Figure 5As shown, in the present embodiment, the connecting through holes 12 between the two adjacent limiting blocks 7 are misaligned to avoid interference of the screws 13 on the two adjacent limiting blocks 7. Preferably, among the two adjacent limiting blocks 7, the connecting through hole 12 of one limiting block 7 is arranged at the center, and the other limiting block 7 is provided with two connecting through holes 12, which are arranged near the two sides of the limiting block 7 respectively.

[0029] Referring to Figure 1 As shown, in some embodiments, the heat insulation kiln body 1 includes a preheating section, a plurality of heating sections, and a cooling section. In the preheating section, the box body structure is slowly heated, moisture and binder are removed, and preliminary solid-phase reaction begins to occur. In the heating section, the box body structure is heated to the highest temperature (1100-1300°C) and kept for a certain period of time to complete the solid-phase reaction. In the cooling section, the box body structure is controllably cooled to the discharge temperature through indirect air cooling. The gas nozzles are mainly arranged in the heating section to rapidly heat the powder by combustion, and further include: a plurality of branch gas inlets 5 arranged in the plurality of heating sections; and waste gas generated by combustion in the heating section enters the branch gas inlets 5. A total gas storage pipe 6, the total gas storage pipe 6 is connected to the plurality of branch gas inlets 5; the waste gas generated by combustion in the heating section is gathered in the total gas storage pipe 6. A preheating pipe 4, the preheating pipe 4 is connected to the preheating section, and the preheating pipe 4 is connected to the total gas storage pipe 6. The waste gas generated by combustion in the heating section flows to the preheating section through the preheating pipe 4, preheats the box body structure, effectively utilizes the residual heat of the heating section, and improves the heat utilization efficiency of the gas tunnel kiln.

[0030] Referring to Figure 1 As shown, in some embodiments, further including: a preheating cover 2, the preheating cover 2 is detachably arranged on the top of the preheating section, and the preheating pipe 4 is connected to the preheating pipe 4. In the direction downward along the z-axis, the cross-sectional area of the preheating cover 2 gradually increases, and the preheating cover 2 is used to effectively increase the injection area of the waste gas generated by combustion, so that the waste gas can effectively cover the stacked box body structures on the bearing plate 10, and the preheating effect is improved.

[0031] Referring to Figure 1 and Figure 2 As shown, in some embodiments, further including: a closing door 3, the closing door 3 is movably arranged in the preheating section, and the closing door 3 is used to close the preheating section. The preheating section is provided with openings at both ends, one end of the opening is connected with the heating section, and the other end of the opening is connected with the closing door 3. When necessary, the opening of the preheating section can be closed by the closing door 3 to avoid heat loss.

[0032] Referring to Figure 1 and Figure 2 As shown, in some embodiments, further including: a resting table 9, the resting table 9 is arranged on one side of the preheating section, and the other side of the preheating section is used to connect the heating section. The resting table 9 is used to stack the box body structures, which is convenient for subsequent feeding of the box body structures into the preheating section.

[0033] The above merely provides part or preferred embodiments of the present application, and neither the text nor the drawings can limit the scope of protection of the present application. Any equivalent structure variations made according to the contents of the present application and drawings, or direct / indirect application in other related technical fields shall fall within the scope of protection of the present application.

Claims

1. A gas tunnel kiln for calcining lead titanate ceramic powder, comprising a heat-insulated kiln body (1), a conveying structure, the conveying structure comprising a driven wheel (8), a driving wheel and a conveying chain connecting the driven wheel (8) and the driving wheel in rotation, the conveying chain comprising a plurality of chain links connected in a head-to-tail manner, a load bearing plate (10) being arranged on the chain links, characterized in that, Also include: A plurality of limiting members, along the y-axis direction, the bearing plate (10) is provided with a plurality of limiting members.

2. The gas tunnel furnace for calcining lead titanate ceramic powder according to claim 1, wherein The limiting member includes: a plurality of limiting blocks (7), a plurality of limiting blocks (7) are stacked along the z-axis direction, and the adjacent two limiting blocks (7) are connected by fasteners along the z-axis direction.

3. The gas tunnel kiln for calcining lead titanate ceramic powder according to claim 1, wherein The heat insulation kiln body (1) includes a preheating section, a plurality of heating sections, and a cooling section, and further includes: A plurality of said heating section is provided with a said branch gas pipe (5); a total gas storage pipe (6) is connected with a plurality of said branch gas pipe (5); a preheating pipe (4) is connected with said preheating section, and said preheating pipe (4) is connected with said total gas storage pipe (6).

4. The gas tunnel kiln for calcining lead titanate ceramic powder according to claim 3, wherein Also include: A preheating cover (2) is detachably arranged on the top of the preheating section, and the preheating pipe (4) is connected with the preheating pipe (4).

5. The gas tunnel kiln for calcining lead titanate ceramic powder according to claim 3, wherein Also include: A closing door (3) is movably arranged in the preheating section, and the closing door (3) is used for blocking the preheating section.

6. The gas tunnel kiln for calcining lead titanate ceramic powder according to claim 3, wherein Also include: A resting table (9) is arranged on one side of the preheating section.

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