Atmosphere roller kiln heating silicon-carbon rod punching air inlet structure

Abstract

The application provides an atmosphere roller kiln heating silicon-carbon rod punching gas inlet structure, relates to the technical field of atmosphere structure for preheating and sintering of a roller kiln, and comprises a heating and punching silicon-carbon rod; the heating and punching silicon-carbon rod penetrates the inner wall of a kiln body, the heating and punching silicon-carbon rod is located at the front side of a heating and non-punching silicon-carbon rod, the two ends of the heating and punching silicon-carbon rod are connected with gas pipes, and the outer part of the gas pipes is clamped with a plugboard; the rotating structure comprises a rotating rod, a driven bevel gear and a clamping pin, the rotating rod penetrates and movably clamps the inside of a control box, the inner end of the rotating rod is provided with a bevel gear, the bevel gear is meshed and connected with the driven bevel gear, the gas is directly sent into the heating and punching silicon-carbon rod, the gas is sent into the kiln cavity after preheating through the carbon rod and then passing through the carbon rod heating section, the gas is prevented from flowing and diffusing from the kiln wall, the kiln pressure is ensured, the atmosphere uniformity is good, the consistency of the sintered product is good, the problem that the atmosphere uniformity in the kiln is poor, the kiln pressure cannot be ensured, and the consistency of the sintered product is poor is solved.

Description

Technical Field

[0001] This invention relates to the field of preheating and sintering atmosphere structure technology for roller kilns, and particularly to a perforated air intake structure for heating silicon carbide rods in an atmosphere roller kiln. Background Technology

[0002] Roller kilns are mainly used for the production of ceramic building materials. They are continuous firing kilns, tunnel kilns that use rotating rollers as the transport vehicle for the ceramic blanks. The rotation of the rollers transfers the ceramic from the kiln head to the kiln tail. In atmosphere roller kilns, a certain amount of gas must be introduced into the kiln cavity during atmosphere sintering. However, traditional atmosphere roller kilns introduced gas into the kiln cavity through openings in the furnace wall. This method easily causes the gas to dissipate from the furnace wall, resulting in poor atmosphere uniformity, inability to guarantee kiln pressure, and consequently, poor consistency in the sintered products. Summary of the Invention

[0003] In view of this, the present invention provides an atmosphere roller kiln heating silicon carbide rod perforation air inlet structure, which has a heating perforated silicon carbide rod and a control box, which can send gas into the kiln cavity and ensure good uniformity of gas atmosphere, ensure kiln pressure in the kiln cavity, and make the sintered products have good consistency.

[0004] This invention provides a perforated air inlet structure for heating silicon carbide rods in an atmosphere roller kiln, specifically including a kiln body, a non-perforated silicon carbide heating rod, a perforated silicon carbide heating rod, and a rotating structure; control boxes are welded to the left and right sides of the kiln body, and a conveyor roller is installed inside the kiln body, with the interior of the kiln body forming a kiln cavity connected in the front-to-back direction; the non-perforated silicon carbide heating rod penetrates the inner wall of the kiln body, with its cold end placed inside the control box; the perforated silicon carbide heating rod penetrates the inner wall of the kiln body, is located in front of the non-perforated silicon carbide heating rod, and its two cold ends are connected to air pipes. An insert plate is externally attached to the air tube; the rotating structure includes a rotating rod, a driven bevel gear, and a locking pin. The rotating rod passes through and is movably locked inside the control box. A bevel gear is provided at the inner end of the rotating rod, and the bevel gear meshes with the driven bevel gear. A slot is provided at the top of the driven bevel gear, and a locking pin is locked inside the slot. A retaining ring is sleeved on the outside of the driven bevel gear. A fixing plate is inserted into the outer end of the insert plate, and the outer end of the fixing plate is welded to the inner wall of the control box. A connector is inserted between the insert plate and the fixing plate, and the insert plate, fixing plate, and connector form a support assembly; the product is placed on the top surface of the conveyor roller.

[0005] Optionally, a rotating block is welded to the outer end of the rotating rod, and two sets of clamping plates are welded to the outer wall of the driven bevel gear. The outer diameter of the clamping plates is larger than the outer diameter of the fixed ring, and the clamping pin is slidably engaged inside the slide groove.

[0006] Optionally, the fixing plate has a slot inside, and a plug plate is inserted into the slot. The fixing plate has equally spaced insertion holes in the front and back direction. The plug plate has equally spaced through holes in the front and back direction. The spacing and size of the through holes are equal to those of the insertion holes. An indicator strip is welded to the front end face of the plug plate. The plug bracket is inserted into the through holes and insertion holes.

[0007] Optionally, the heated perforated silicon carbide rod is provided with air supply holes, and the air supply holes of the upper and lower heated perforated silicon carbide rods are all facing one side of the product. The heated perforated silicon carbide rods on the upper and lower sides are mirror symmetrical. An indicator rod is provided on the outer end face of the heated perforated silicon carbide rod, and sliding grooves are provided on the top of both sides of the heated perforated silicon carbide rod.

[0008] Optionally, the top of the fixing ring is welded to the inner top surface of the control box via two sets of support rods.

[0009] Optionally, the center height of the control box is flush with the center height of the heating perforated silicon carbide rod, and an observation window made of transparent material is snapped onto the outside of the control box.

[0010] Optionally, the left and right inner walls of the kiln body are provided with rod-passing holes. The inner diameter of the rod-passing holes is 1.4-1.6 times the outer diameter of the silicon carbide rods. The gap between the rod-passing holes and the silicon carbide rods is filled with filler. The conveying rollers are located in the middle of the kiln cavity.

[0011] Beneficial effects

[0012] According to various embodiments of the present invention, the roller kiln heating silicon carbide rod perforation air inlet structure, compared with the traditional perforation air inlet structure, by setting heating perforated silicon carbide rods, the gas is directly fed into the heating perforated silicon carbide rods, and after being preheated by the carbon rods, it is fed into the kiln cavity through the outlet holes of the carbon rod heating section, which avoids the gas from flowing out of the kiln wall, ensures the kiln pressure, achieves good atmosphere uniformity, and makes the sintered products have good consistency.

[0013] In addition, when the rotating block is rotated, it drives the rotating rod to rotate, which in turn drives the bevel gear to rotate. Through meshing, the driven bevel gear rotates, and through the locking pin, the heated and perforated silicon carbide rod rotates. By observing the angle difference between the indicator rod and the indicator strip, the orientation and angle of the air supply hole can be determined to ensure a uniform gas atmosphere.

[0014] In addition, the filler material ensures that the heated perforated silicon carbide rod and the heated non-perforated silicon carbide rod are separated in a sealed environment, and the gas supplied to both ends of the heated perforated silicon carbide rod will not enter the heated non-perforated silicon carbide rod. By setting the rod through hole, the heated non-perforated silicon carbide rod or the heated perforated silicon carbide rod can be smoothly inserted into the kiln cavity without affecting the thermal expansion and contraction of the heated non-perforated silicon carbide rod or the heated perforated silicon carbide rod, thus ensuring the normal heating operation of the silicon carbide rod. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0016] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0017] In the attached diagram:

[0018] Figure 1 A schematic diagram of the kiln body from the right front side view according to the present invention is shown;

[0019] Figure 2 A schematic diagram of the structure from the left side view according to body 1 is shown;

[0020] Figure 3 A schematic cross-sectional view of the kiln body according to the present invention is shown;

[0021] Figure 4 A schematic diagram of the connection structure between the local control box and the silicon carbide rod according to the present invention is shown;

[0022] Figure 5 The present invention is shown Figure 4 A schematic diagram of a local structure in the image;

[0023] Figure 6 A schematic diagram of a partial cross-sectional structure of a heated perforated silicon carbide rod according to the present invention is shown;

[0024] Figure 7 A schematic diagram of the support component according to the present invention is shown;

[0025] Figure 8 The present invention is shown Figure 3 A magnified structural diagram of point A in the middle.

[0026] List of reference numerals

[0027] 1. Kiln body; 101. Piercing rod hole; 102. Conveyor roller; 2. Kiln cavity; 3. Heating non-perforated silicon carbide rod; 4. Heating perforated silicon carbide rod; 401. Air inlet; 402. Indicator rod; 403. Slide groove; 5. Product; 6. Control box; 601. Observation window; 7. Rotating structure; 71. Rotating rod; 72. Driven bevel gear; 7201. Card plate; 7202. Card slot; 73. Card pin; 8. Fixing ring; 801. Support rod; 9. Support assembly; 91. Fixing plate; 9101. Slot; 9102. Insertion hole; 92. Insertion plate; 9201. Through hole; 9202. Indicator strip; 93. Insertion bracket. Detailed Implementation

[0028] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0029] Example 1: Please refer to Figures 1 to 8 :

[0030] This invention proposes a perforated air intake structure for heating silicon carbide rods in an atmosphere roller kiln, comprising a kiln body 1, a non-perforated silicon carbide rod 3, a perforated silicon carbide rod 4, and a rotating structure 7. Control boxes 6 are welded to the left and right sides of the kiln body 1, and a conveyor roller 102 is installed inside the kiln body 1. The interior of the kiln body 1 is a kiln cavity 2 connected in the front-to-back direction. The non-perforated silicon carbide rod 3 penetrates the inner wall of the kiln body 1, and its cold end is placed inside the control box 6. The perforated silicon carbide rod 4 penetrates the inner wall of the kiln body 1, is located in front of the non-perforated silicon carbide rod 3, and its two cold ends are connected to air pipes, with insert plates 92 clamped to the outside of the air pipes. The rotating structure 7... The control box 6 includes a rotating rod 71, a driven bevel gear 72, and a locking pin 73. The rotating rod 71 passes through and is movably locked inside the control box 6. The inner end of the rotating rod 71 is provided with a bevel gear, which meshes with the driven bevel gear 72. The top of the driven bevel gear 72 has a slot 7202, and the locking pin 73 is locked inside the slot 7202. A fixing ring 8 is sleeved on the outside of the driven bevel gear 72. A fixing plate 91 is inserted into the outer end of the insert plate 92. The outer end of the fixing plate 91 is welded to the inner wall of the control box 6. A connector 93 is inserted between the insert plate 92 and the fixing plate 91. The insert plate 92, the fixing plate 91, and the connector 93 form a support assembly 9. The product 5 is placed on the top surface of the conveyor roller 102.

[0031] In addition, as attached Figure 6 Appendix Figure 7 and attached Figure 8As shown, the fixed plate 91 has a slot 9101 inside, and the insert plate 92 is inserted into the slot 9101. The fixed plate 91 has equally spaced insertion holes 9102 in the front-back direction. The insert plate 92 has equally spaced through holes 9201 in the front-back direction. The spacing and size of the through holes 9201 are equal to those of the insertion holes 9102. An indicator strip 9202 is welded to the front end face of the insert plate 92. The insertion bracket 93 is inserted into the through holes 9201 and the insertion holes 9102. The insert plate 92 is then inserted into the slot 92. After being connected to the slot 9101, the insert plate 92 is fixed to the fixing plate 91 by the plug bracket 93. At the same time, the connection between the air pipe and the heating perforated silicon carbide rod 4 is fixed at a fixed height, and the position of the indicator bar 9202 is fixed, forming the adjustment reference of the indicator rod 402. After adjusting by rotating the structure 7, the orientation and angle of the air supply hole 401 can be determined by observing the angle difference between the indicator rod 402 and the indicator bar 9202, thereby ensuring that the control box 6 is always in a closed state and increasing the sealing performance.

[0032] In addition, as attached Figure 2 Appendix Figure 3 and attached Figure 4 As shown, the center height of the control box 6 is flush with the center height of the heating perforated silicon carbide rod 4. An observation window 601 is snapped onto the outside of the control box 6. The observation window 601 is made of transparent material. The orientation of the air supply hole 401 of the heating perforated silicon carbide rod 4 can be observed through the observation window 601 and adjusted in time.

[0033] In addition, as attached Figure 2 Appendix Figure 3 and attached Figure 5 As shown, a rotating block is welded to the outer end of the rotating rod 71, and two sets of clamping plates 7201 are welded to the outer wall of the driven bevel gear 72. The outer diameter of the clamping plate 7201 is larger than the outer diameter of the fixed ring 8. The clamping pin 73 is slidably engaged in the interior of the slide groove 403. When the rotating block is rotated, it drives the rotating rod 71 to rotate, which in turn drives the bevel gear to rotate. Through meshing, it drives the driven bevel gear 72 to rotate, and through the clamping pin 73, it drives the heating and perforated silicon carbide rod 4 to rotate, thereby adjusting the orientation of the air supply hole 401 to ensure a uniform gas atmosphere.

[0034] In addition, as attached Figure 3As shown, the left and right inner walls of the kiln body 1 are provided with rod-through holes 101. The inner diameter of the rod-through hole 101 is 1.4-1.6 times the outer diameter of the silicon carbide rod. The gap between the rod-through hole 101 and the silicon carbide rod is filled with filler. The conveying roller 102 is located in the middle of the kiln cavity 2. The filler can ensure that the heated perforated silicon carbide rod 4 and the heated non-perforated silicon carbide rod 3 are separated in a sealed environment, and the gas sent into both ends of the heated perforated silicon carbide rod 4 will not enter the heated non-perforated silicon carbide rod 3. By setting the rod-through hole 101, the heated non-perforated silicon carbide rod 3 or the heated perforated silicon carbide rod 4 can be smoothly inserted into the kiln cavity 2. When the silicon carbide rod expands and contracts due to heat, it will squeeze out the filler, without affecting the thermal expansion and contraction of the heated non-perforated silicon carbide rod 3 or the heated perforated silicon carbide rod 4.

[0035] In addition, as attached Figure 6 Appendix Figure 7 and attached Figure 8 As shown, the heated perforated silicon carbide rod 4 has an air supply hole 401. The air supply holes 401 of the upper and lower heated perforated silicon carbide rods 4 are both facing the product 5. The heated perforated silicon carbide rods 4 on the upper and lower sides are mirror symmetrical. An indicator rod 402 is provided on the outer end face of the heated perforated silicon carbide rod 4. Sliding grooves 403 are respectively provided on the top of both sides of the heated perforated silicon carbide rod 4. The gas fed into the upper heated perforated silicon carbide rod 4 is preheated by the silicon carbide rod and then conveyed downward through the air supply hole 401. The gas fed into the lower heated perforated silicon carbide rod 4 is preheated by the silicon carbide rod and then conveyed upward through the air supply hole 401. The gas atmosphere inside the kiln cavity 2 is uniform, which can effectively ensure the kiln pressure inside the kiln cavity 2 and make the sintered product 5 have good consistency.

[0036] In addition, as attached Figure 6 As shown, the top of the fixing ring 8 is welded to the inner top surface of the control box 6 through two sets of support rods 801. The fixing ring 8 fixes the driven bevel gear 72 to the fixed axis, so that the heated perforated silicon carbide rod 4 rotates on the fixed axis, while supporting the cold end of the heated perforated silicon carbide rod 4 and the driven bevel gear 72.

[0037] The specific usage and function of this embodiment are as follows:

[0038] In this invention, firstly, the product 5 to be sintered is placed on the conveyor roller 102. Gas is preheated through the silicon carbide rod via the gas pipe and then conveyed through the gas inlet 401. Then, the orientation of the gas inlet 401 of the heated and perforated silicon carbide rod 4 can be observed through the observation window 601. After rotating the rotating block, the rotating rod 71 is driven to rotate, which in turn drives the bevel gear to rotate. Through meshing, the driven bevel gear 72 is driven to rotate, and the heated and perforated silicon carbide rod 4 is driven to rotate through the locking pin 73, thereby adjusting the orientation of the gas inlet 401 to ensure a uniform gas atmosphere. Finally, the sintering of the product 5 is completed and it is output through the conveyor roller 102.

Claims

1. An atmosphere roller kiln heating silicon carbide rod perforated air intake structure, comprising a kiln body (1), a heating non-perforated silicon carbide rod (3), a heating perforated silicon carbide rod (4), and a rotating structure (7); control boxes (6) are welded to the left and right sides of the kiln body (1), a conveyor roller (102) is installed inside the kiln body (1), and the interior of the kiln body (1) is a kiln cavity (2) connected in the front and back directions; the heating non-perforated silicon carbide rod (3) penetrates the inner wall of the kiln body (1), and the cold end of the heating non-perforated silicon carbide rod (3) is placed inside the control box (6); the heating perforated silicon carbide rod (4) penetrates the inner wall of the kiln body (1), the heating perforated silicon carbide rod (4) is located in front of the heating non-perforated silicon carbide rod (3), and the cold ends of the two ends of the heating perforated silicon carbide rod (4) are connected to air pipes, and insert plates (92) are clamped to the outside of the air pipes; the rotating structure (7) includes a rotating... The rotating rod (71), driven bevel gear (72), and locking pin (73) are connected. The rotating rod (71) passes through and is movably locked inside the control box (6). The inner end of the rotating rod (71) is provided with a bevel gear, which meshes with the driven bevel gear (72). The top of the driven bevel gear (72) is provided with a slot (7202), and the slot (7202) is locked with the locking pin (73). A fixing ring (8) is sleeved on the outside of the driven bevel gear (72). The outer end of the insert plate (92) is inserted with a fixing plate (91). The outer end of the fixing plate (91) is welded to the inner wall of the control box (6). A connector (93) is inserted between the insert plate (92) and the fixing plate (91). The insert plate (92), the fixing plate (91), and the connector (93) form a support assembly (9). The top surface of the conveyor roller (102) is used to place the product (5). The outer end face of the heated perforated silicon carbide rod (4) is provided with an indicator rod (402), and the top two sides of the heated perforated silicon carbide rod (4) are respectively provided with sliding grooves (403). The outer end of the rotating rod (71) is welded with a rotating block, and the outer wall of the driven bevel gear (72) is welded with two sets of clamping plates (7201). The outer diameter of the clamping plate (7201) is larger than the outer diameter of the fixed ring (8), and the clamping pin (73) is slidably engaged in the inside of the slide groove (403). An indicator strip (9202) is welded to the front end face of the insert plate (92); When the rotating block is rotated, it drives the rotating rod (71) to rotate, which in turn drives the bevel gear to rotate. Through meshing, it drives the driven bevel gear (72) to rotate, and through the locking pin (73), it drives the heated and perforated silicon carbide rod 4 to rotate, thereby adjusting the orientation of the gas delivery hole (401) to ensure a uniform gas atmosphere.

2. The atmosphere roller kiln heating silicon carbide rod perforation and air inlet structure according to claim 1, characterized in that: The left and right inner walls of the kiln body (1) are provided with rod-through holes (101). The inner diameter of the rod-through holes (101) is 1.4-1.6 times the outer diameter of the silicon carbide rod. The gap between the rod-through holes (101) and the silicon carbide rod is filled with filler. The conveyor roller (102) is located in the middle of the kiln cavity (2).

3. The atmosphere roller kiln heating silicon carbide rod perforation and air inlet structure according to claim 2, characterized in that: The heated perforated silicon carbide rod (4) has an air supply hole (401). The air supply holes (401) of the upper and lower heated perforated silicon carbide rods (4) are all facing the product (5) side, and the heated perforated silicon carbide rods (4) on the upper and lower sides are mirror symmetrical.

4. The atmosphere roller kiln heating silicon carbide rod perforation and air inlet structure according to claim 3, characterized in that: The center height of the control box (6) is flush with the center height of the heating and perforating silicon carbide rod (4). An observation window (601) is attached to the outside of the control box (6), and the observation window (601) is made of transparent material.

5. The atmosphere roller kiln heating silicon carbide rod perforation and air inlet structure according to claim 4, characterized in that: The top of the fixing ring (8) is welded to the inner top surface of the control box (6) by two sets of support rods (801).

6. The perforated air inlet structure for heating silicon carbide rods in an atmosphere roller kiln according to claim 1, characterized in that: The fixed plate (91) has a slot (9101) inside, and a plug plate (92) is inserted into the slot (9101). The fixed plate (91) has equally spaced insertion holes (9102) in the front and back direction. The plug plate (92) has equally spaced through holes (9201) in the front and back direction. The spacing and size of the through holes (9201) are equal to those of the insertion holes (9102). The plug bracket (93) is inserted into the through holes (9201) and the insertion holes (9102).

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