Heating furnace for drying ink glass

Abstract

The invention relates to the field of printing ink glass production equipment, and discloses a heating furnace for drying printing ink glass, which is provided with a preheating area, a printing ink sintering area and a plurality of annealing areas which are arranged in sequence, the preheating area, the ink sintering area and the annealing areas are each provided with a plurality of heating wire sets and a plurality of conveying rollers. The plurality of heating wire groups are divided into two rows, and the two rows of heating wire groups are respectively arranged above and below the plurality of conveying rollers; the temperature of the ink sintering area is higher than that of the preheater; a plurality of temperature balance pipes are mounted in the annealing area and are divided into two rows which are symmetrically arranged up and down; the plurality of temperature balancing pipes in one row are arranged between the upper heating wire group and the conveying roller at intervals, or are arranged between the lower heating wire group and the conveying roller at intervals; the temperature balance pipes are used for inputting cooling air into the corresponding annealing areas and enabling the temperatures of the multiple annealing areas to be sequentially reduced. And the adopted ink glass is not subjected to machining treatment, so that the phenomenon of cracks or bursting is avoided, and the ink glass has good machining performance.

Description

Technical Field

[0001] The invention relates to the technical field of ink glass production equipment, and in particular to a heating furnace for drying ink glass. Background Art

[0002] Ink glass is widely used in building curtain walls, automobiles, home appliances and door and window decoration.

[0003] The drying process of ink glass in the prior art is as follows: the glass coated with ink on the surface is baked at high temperature in a heating furnace, the ink and the glass body are melted into one and solidified, and then the glass is quenched by instantaneous cooling to obtain ink glass.

[0004] Since the ink glass produced according to the above production process is tempered glass, it does not have the processing properties of cutting and edge grinding, resulting in that the size of the finished ink glass cannot be adjusted, which reduces the versatility of the ink glass in stock and can only be produced according to the size of the actual order, limiting the flexibility of the production schedule. Summary of the invention

[0005] In view of the above-mentioned shortcomings, the purpose of the present invention is to provide a heating furnace for drying ink glass, so as to solve the problems of poor dimensional versatility of ink glass finished products in the prior art and poor flexibility in production scheduling.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A heating furnace for drying ink glass, comprising a preheating zone, an ink sintering zone and a plurality of annealing zones arranged in sequence in a forward running direction;

[0008] The preheating zone, ink sintering zone and multiple annealing zones are all equipped with multiple heating wire groups and multiple conveying rollers;

[0009] The plurality of conveying rollers are arranged at intervals along the front-to-back direction, and the plurality of heating wire groups are divided into two rows, and the two rows of heating wire groups are arranged above and below the plurality of conveying rollers respectively;

[0010] The temperature of the ink sintering zone is higher than the temperature of the preheating zone; the annealing zone is equipped with a plurality of temperature balance tubes, which are divided into two rows symmetrically arranged in an upper and lower direction; the plurality of temperature balance tubes in one row are arranged at intervals and located between the upper heating wire group and the conveying roller; the plurality of temperature balance tubes in another row are arranged at intervals and located between the lower heating wire group and the conveying roller;

[0011] The temperature balance pipe is used to input cooling air into the corresponding annealing zone, and to reduce the temperature of the plurality of annealing zones in sequence from the back to the front.

[0012] Specifically, the temperature balance pipe includes a cooling air exhaust pipe and two cooling air intake pipes;

[0013] The cooling air discharge pipe extends in the left-right direction; one end of the cooling air inlet pipe extends outside the heating furnace to input compressed air; the other ends of the two cooling air inlet pipes extend from the left and right ends of the cooling air discharge pipe respectively and are close to the middle of the cooling air discharge pipe; the gap between the outer peripheral surface of the cooling air inlet pipe and the inner wall of the cooling air discharge pipe forms a cooling air mixing chamber;

[0014] A plurality of air intake holes are provided at the top of the cooling air intake pipe located in the cooling air exhaust pipe, and the plurality of air intake holes are distributed at intervals along the length direction of the cooling air intake pipe;

[0015] The outer peripheral surface of the cooling air exhaust pipe is provided with a plurality of air blowing holes arranged at intervals, and the cooling air exhaust pipe is located between two adjacent conveying rollers in the front and rear directions.

[0016] Furthermore, two opposite surfaces of two cooling air exhaust pipes located in the same annealing zone and adjacent to each other are each provided with a plurality of blowing holes;

[0017] The multiple air blowing holes are divided into two rows; the multiple air blowing holes in one row are spaced apart along the length direction of the cooling air exhaust pipe, and the two rows of air blowing holes are symmetrically distributed front to back along the radial direction of the cooling air exhaust pipe, and are distributed on the same horizontal plane parallel to the top surfaces of the multiple conveying rollers.

[0018] Furthermore, the two opposite surfaces of the two cooling air exhaust pipes located in different annealing zones and adjacent to each other in front and behind do not have the blowing holes.

[0019] Furthermore, the preheating zone and the ink sintering zone are both equipped with a plurality of spiral convection tubes;

[0020] The plurality of spiral convection tubes are divided into two rows symmetrically arranged in an upper and lower direction; the plurality of spiral convection tubes in one row are arranged at intervals between the upper heating wire group and the conveying roller, and the plurality of spiral convection tubes in another row are arranged at intervals between the lower heating wire group and the conveying roller;

[0021] The spiral convection pipe comprises a convection air discharge pipe and a spiral air intake pipe;

[0022] The convection air discharge pipe extends in the left-right direction; one end of the spiral air inlet pipe extends to the outside of the heating furnace to input compressed air; the other end of the spiral air inlet pipe is close to the left end or the right end of the convection air discharge pipe, and is coiled around the convection air discharge pipe along the outer circumference of the convection air discharge pipe, and then extends into and communicates with the inner cavity of the convection air discharge pipe at the right end or the left end of the convection air discharge pipe;

[0023] A plurality of blowing nozzles are installed on the outer peripheral surface of the convection air exhaust pipe; the plurality of blowing nozzles are spaced apart along the length direction of the convection air exhaust pipe, and the blowing nozzles are located between two windings of the coiled spiral air inlet pipe; the output end of the blowing nozzle faces the gap between the two adjacent conveying rollers, and the input end of the blowing nozzle is communicated with the inner cavity of the convection air exhaust pipe.

[0024] Furthermore, the top of the heating furnace located in the preheating zone, the ink sintering zone and the multiple annealing zones is provided with multiple exhaust holes, and multiple exhaust hole coverers that can be raised and lowered are installed correspondingly;

[0025] The exhaust hole cover is used to open and close the corresponding exhaust hole.

[0026] Furthermore, a plurality of air delivery pipes are installed on the top and sides of the heating furnace located in the preheating zone, the ink sintering zone and the plurality of annealing zones;

[0027] The air delivery pipe is provided with an input end and a plurality of output ends; the input end of the air delivery pipe is used to be connected with an external compressed air device to input compressed air, and the output end of the air delivery pipe is connected with one end of the cooling air intake pipe or one end of the spiral intake pipe;

[0028] The air delivery pipe located at the top of the heating furnace is used to communicate with the cooling air intake pipe or the spiral intake pipe located above the conveying roller to deliver compressed air;

[0029] The air delivery pipe located at the side of the heating furnace is used to communicate with the cooling air intake pipe or the spiral intake pipe located below the conveying roller to deliver compressed air.

[0030] Furthermore, a plurality of airflow balancing pipes are installed on the top of the heating furnace;

[0031] The multiple air conveying pipes located at the top of the heating furnace are grouped in pairs; the two air conveying pipes in a group are symmetrically distributed above the preheating zone, ink sintering zone or annealing zone; the two ends of the air flow balance pipe are respectively connected to the two input ends of the two air conveying pipes opposite to each other on the left and right, and one end of the air flow balance pipe is also used to connect with external compressed air equipment to input compressed air.

[0032] Furthermore, the heating furnace is also equipped with a plurality of proportional valves;

[0033] The input end of the proportional valve is used to connect with external compressed air equipment to input compressed air; the output end of the proportional valve is used to connect with one end of the air flow balance pipe, or to connect with the input end of the air delivery pipe located on the side of the heating furnace.

[0034] The beneficial effect of the technical solution of the present invention is as follows: in the heating furnace for drying ink glass, the ink glass is not machined. After the ink glass passes through the preheating zone and the high-temperature sintering zone to complete the drying and solidification of the ink, it is then subjected to segmented cooling treatment in multiple annealing zones, so that no internal stress is generated inside the ink glass after it is taken out of the annealing furnace. The obtained ink glass product has good machining performance, which can improve the dimensional versatility of the finished ink glass product and the flexibility of the production scheduling plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of an embodiment of the heating furnace for drying ink glass of the present invention;

[0036] Figure 2 It is a structural schematic diagram of an embodiment of the preheating zone or ink sintering zone of the heating furnace for drying ink glass of the present invention;

[0037] Figure 3 It is a structural schematic diagram of an embodiment of the annealing zone of the heating furnace for drying ink glass of the present invention;

[0038] Figure 4 for Figure 3 An enlarged view of part A;

[0039] Figure 5 It is a structural schematic diagram of an embodiment of the temperature balance tube of the present invention;

[0040] Figure 6 It is a structural schematic diagram of another embodiment of the temperature balance tube of the present invention;

[0041] Figure 7 for Figure 2 An enlarged view of part B;

[0042] Figure 8 for Figure 1 A schematic diagram of a part of the structure of one of the annealing zones;

[0043] Among them: preheating zone 1; ink sintering zone 2; annealing zone 3; ink glass 10; spiral convection tube 11; conveying roller 12; heating wire group 13; exhaust hole 14; exhaust hole cover 15; air delivery pipe 16; air flow balance pipe 17; proportional valve 19; temperature balance pipe 31; spiral air inlet pipe 111; convection air exhaust pipe 112; cooling air inlet pipe 311; cooling air exhaust pipe 312; blowing nozzle 1121; air inlet hole 3111; blowing hole 3121. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-8 The technical solution of the present invention is further illustrated by specific implementation methods.

[0045] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, which can be said to be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] A heating furnace for drying ink glass, comprising a preheating zone 1, an ink sintering zone 2 and a plurality of annealing zones 3 arranged in sequence in a forward running direction;

[0048] The preheating zone 1, the ink sintering zone 2 and the multiple annealing zones 3 are all equipped with multiple heating wire groups 13 and multiple conveying rollers 12;

[0049] The plurality of conveying rollers 12 are arranged at intervals along the front-to-back direction, and the plurality of heating wire groups 13 are divided into two columns, and the two columns of heating wire groups 13 are arranged above and below the plurality of conveying rollers 12 respectively;

[0050] The temperature of the ink sintering zone 2 is higher than that of the preheating zone 1; the annealing zone 3 is equipped with a plurality of temperature balance tubes 31, and the plurality of temperature balance tubes 31 are divided into two rows symmetrically arranged up and down; the plurality of temperature balance tubes 31 in one row are arranged at intervals and located between the heating wire group 13 and the conveying roller 12 at the top; the plurality of temperature balance tubes 31 in another row are arranged at intervals and located between the heating wire group 13 and the conveying roller 12 at the bottom;

[0051] The temperature balance pipe 31 is used to input cooling air into the corresponding annealing zone 3, and to reduce the temperature of the plurality of annealing zones 3 in sequence from the back to the front.

[0052] Figure 1 This is a schematic diagram of the structure of the heating furnace for drying ink glass of the present invention. Figure 2 This is a schematic structural diagram of the preheating zone 1 or the ink sintering zone 2 of the heating furnace for drying ink glass of the present invention, Figure 3 It is a schematic structural diagram of the annealing zone 3 of the heating furnace for drying ink glass according to the present invention.

[0053] like Figure 1-3 As shown, a plurality of temperature balancing tubes 31 distributed in a plurality of annealing zones 3 respectively transport cooling air to the annealing zones 3, and the flow rates of the cooling air input into the plurality of annealing zones 3 are increased successively, so that the temperature fields of the plurality of annealing zones 3 are decreased successively; the ink glass 10 transported forward by a plurality of conveying rollers 12 is first preheated in the preheating zone 1 and then enters the high-temperature ink sintering zone 2, where the ink in the ink sintering zone 2 penetrates into the softened glass surface under a high temperature state and is sintered, and the ink glass 10 that has completed ink sintering then enters the plurality of annealing zones 3 successively, so that the temperature of the ink glass 10 is gradually decreased, thereby avoiding the generation of internal stress in the ink glass 10 during the cooling process, and making the ink glass 10 after leaving the furnace have the processing performance of being able to be cut and edged.

[0054] The ink glass 10 used in the heating furnace for drying ink glass of the present invention is not machined, and the annealed ink glass 10 has good machining performance, so that the stock ink glass 10 has universal cuttable sizes and can also improve the flexibility of production scheduling.

[0055] Specifically, the temperature balance pipe 31 includes a cooling air exhaust pipe 312 and two cooling air intake pipes 311;

[0056] The cooling air discharge pipe 312 extends in the left-right direction; one end of the cooling air intake pipe 311 extends outside the heating furnace to input compressed air; the other ends of the two cooling air intake pipes 311 extend from the left and right ends of the cooling air discharge pipe 312 respectively, and are close to the middle of the cooling air discharge pipe 312; the gap between the outer peripheral surface of the cooling air intake pipe 311 and the inner wall of the cooling air discharge pipe 312 forms a cooling air mixing chamber;

[0057] A plurality of air intake holes 3111 are provided at the top of the cooling air intake pipe 311 located in the cooling air exhaust pipe 312, and the plurality of air intake holes 3111 are spaced apart along the length direction of the cooling air intake pipe 311;

[0058] The outer peripheral surface of the cooling air exhaust pipe 312 is provided with a plurality of air blowing holes 3121 arranged at intervals, and the cooling air exhaust pipe 312 is located between two adjacent conveying rollers 12 in front and behind.

[0059] like Figure 3-5 As shown, compressed air passes through the cooling air inlet pipe 311 and enters the cooling air mixing chamber located between the outer peripheral surface of the cooling air inlet pipe 311 and the inner wall of the cooling air exhaust pipe 312 through a plurality of air inlet holes 3111, so that the air pressure of the compressed air located in the cooling air mixing chamber is equalized, and the compressed air with equalized air pressure is output from the plurality of air blowing holes 3121 to the annealing zone 3, so that the temperature of the temperature field in the corresponding annealing zone 3 is reduced, thereby reducing the temperature of the ink glass 10 passing through.

[0060] Furthermore, two opposite surfaces of two cooling air exhaust pipes 312 located in the same annealing zone 3 and adjacent to each other are provided with a plurality of blowing holes 3121;

[0061] The multiple air blowing holes 3121 are divided into two rows; the multiple air blowing holes 3121 in one row are spaced apart along the length direction of the cooling air exhaust pipe 312, and the two rows of air blowing holes 3121 are symmetrically distributed front to back along the radial direction of the cooling air exhaust pipe 312, and are distributed on the same horizontal plane parallel to the top surfaces of the multiple conveying rollers 12.

[0062] like Figure 3-5 As shown, the cooling air output from the two blowing holes 3121 located in the same annealing zone 3 and facing each other interfere with each other, so that the cooling air distribution in the same annealing zone 3 can be more uniform, thereby improving the distribution uniformity of the temperature field in the annealing zone 3, thereby improving the cooling quality of the ink glass 10, and avoiding the internal stress of the ink glass 10 due to the uneven distribution of the temperature field.

[0063] Furthermore, the two opposite surfaces of the two cooling air exhaust pipes 312 located in different annealing zones 3 and adjacent to each other in front and behind do not have the blowing holes 3121 .

[0064] like Figure 6 The cooling air exhaust pipe 312 shown is a schematic diagram of the structure of any one of the two cooling air exhaust pipes 312 adjacent to each other in front and behind and located in different annealing zones 3. No blowing hole 3121 is provided on the side of the cooling air exhaust pipe 312 facing the other annealing zone 3. Since the temperatures of the two adjacent annealing zones 3 are different, this is achieved by the different flow rates of the cooling air input by the cooling air exhaust pipe 312. Such a setting can prevent the cooling air output by the cooling air exhaust pipe 312 located at the front end or rear end of one annealing zone 3 from affecting the uniformity of the temperature distribution of the temperature field at the front end or rear end of another annealing zone 3.

[0065] Furthermore, the preheating zone 1 and the ink sintering zone 2 are both equipped with a plurality of spiral convection tubes 11;

[0066] The plurality of spiral convection tubes 11 are divided into two rows symmetrically arranged in the upper and lower directions; the plurality of spiral convection tubes 11 in one row are arranged at intervals between the upper heating wire group 13 and the conveying roller 12, and the plurality of spiral convection tubes 11 in another row are arranged at intervals between the lower heating wire group 13 and the conveying roller 12;

[0067] The spiral convection pipe 11 includes a convection air discharge pipe 112 and a spiral air intake pipe 111;

[0068] The convection air discharge pipe 112 extends in the left-right direction; one end of the spiral air inlet pipe 111 extends outside the heating furnace to input compressed air; the other end of the spiral air inlet pipe 111 is close to the left end or the right end of the convection air discharge pipe 112, and is coiled around the convection air discharge pipe 112 along the outer circumference of the convection air discharge pipe 112, and then extends into and communicates with the inner cavity of the convection air discharge pipe 112 at the right end or the left end of the convection air discharge pipe 112;

[0069] A plurality of blowing nozzles 1121 are installed on the outer peripheral surface of the convection air exhaust pipe 112; the plurality of blowing nozzles 1121 are spaced apart along the length direction of the convection air exhaust pipe 112, and the blowing nozzles 1121 are located between two windings of the coiled spiral air inlet pipe 111; the output end of the blowing nozzle 1121 faces the gap between the two adjacent conveying rollers 12, and the input end of the blowing nozzle 1121 is connected to the inner cavity of the convection air exhaust pipe 112.

[0070] like Figure 2 and Figure 7 As shown, the air input through the spiral air inlet pipe 111 is heated in the upper furnace chamber or the lower furnace chamber of the preheating zone 1 or the ink sintering zone 2, and then enters the inner cavity of the convection air exhaust pipe 112, and then blows the heated air to the preheating zone 1 and the ink sintering zone 2 through multiple blowing nozzles 1121 distributed on the outer peripheral surface of the convection air exhaust pipe 112, so that air convection can be formed in the preheating zone 1 or the ink sintering zone 2 to improve the heat exchange efficiency of the ink glass 10.

[0071] Furthermore, the top of the heating furnace located in the preheating zone 1, the ink sintering zone 2 and the multiple annealing zones 3 is provided with multiple exhaust holes 14, and correspondingly, multiple exhaust hole cover devices 15 that can be raised and lowered are installed;

[0072] The exhaust hole cover 15 is used to open and close the corresponding exhaust hole 14.

[0073] like Figure 2 and Figure 3 As shown, part of the hot air in the heating furnace is discharged to the outside through the exhaust holes 14 to avoid excessive air pressure in the heating furnace due to the input convection air or cooling air; when the temperature is too high locally, part of the hot air can also be discharged to the outside through the corresponding exhaust holes 14 to balance the uniformity of the internal temperature distribution.

[0074] Furthermore, a plurality of air delivery pipes 16 are installed on the top and sides of the heating furnace located in the preheating zone 1, the ink sintering zone 2 and the plurality of annealing zones 3;

[0075] The air delivery pipe 16 is provided with an input end and a plurality of output ends; the input end of the air delivery pipe 16 is used to communicate with external compressed air equipment to input compressed air, and the output end of the air delivery pipe 16 is connected to one end of the cooling air intake pipe 311 or one end of the spiral intake pipe 111;

[0076] The air delivery pipe 16 located at the top of the heating furnace is used to communicate with the cooling air intake pipe 311 or the spiral intake pipe 111 located above the conveying roller 12 to deliver compressed air;

[0077] The air delivery pipe 16 located on the side of the heating furnace is used to communicate with the cooling air intake pipe 311 or the spiral intake pipe 111 located below the conveying roller 12 to deliver compressed air.

[0078] like Figure 1 As shown, compressed air is provided to the cooling air intake pipe 311 or the spiral intake pipe 111 located above the conveying roller 12 through the air delivery pipe 16 located at the top of the heating furnace; and compressed air is provided to the cooling air intake pipe 311 or the spiral intake pipe 111 located below the conveying roller 12 through the air delivery pipe 16 located at the side of the heating furnace.

[0079] Furthermore, a plurality of airflow balancing pipes 17 are installed on the top of the heating furnace;

[0080] The multiple air delivery pipes 16 located at the top of the heating furnace are grouped in pairs; a group of two air delivery pipes 16 are symmetrically distributed above the preheating zone 1, the ink sintering zone 2 or the annealing zone 3; the two ends of the air flow balance pipe 17 are respectively connected to the two input ends of the two air delivery pipes 16 opposite to each other on the left and right, and one end of the air flow balance pipe 17 is also used to be connected to an external compressed air device to input compressed air.

[0081] like Figure 1As shown, through the connection of the air flow balance pipe 17, the air flow rate of the compressed air input by the two cooling air inlet pipes 311 above the preheating zone 1 above the conveying roller 12 is the same, or the air flow rate of the compressed air input by the two cooling air inlet pipes 311 above the ink sintering zone 2 is the same, or the air flow rate of the compressed air input by the two spiral inlet pipes 111 of any annealing zone 3 is the same.

[0082] Furthermore, the heating furnace is also equipped with a plurality of proportional valves 19;

[0083] The input end of the proportional valve 19 is used to be connected to an external compressed air device to input compressed air; the output end of the proportional valve 19 is used to be connected to one end of the air flow balance pipe 17, or to be connected to the input end of the air delivery pipe 16 located on the side of the heating furnace.

[0084] like Figure 1 As shown, the air flow rate entering the corresponding air delivery pipe 16 can be controlled by the proportional valve 19 .

[0085] In summary, if Figure 1-5 In the embodiment of the present invention shown, the heating furnace for drying ink glass, the ink glass 10 is not machined. After the ink glass 10 passes through the preheating zone 1 and the high-temperature sintering zone 2 to complete the drying and curing of the ink, it is then subjected to segmented cooling treatment in multiple annealing zones 3, so that no internal stress is generated inside the ink glass 10 after it is taken out of the furnace, and the ink glass 10 has good machining performance, which can improve the dimensional versatility of the finished ink glass and the flexibility of the production scheduling plan.

[0086] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A heating furnace for drying ink glass, characterized in that: It is provided with a preheating zone, an ink sintering zone and a plurality of annealing zones arranged in sequence along the forward running direction; The preheating zone, ink sintering zone and multiple annealing zones are all equipped with multiple heating wire groups and multiple conveying rollers; The plurality of conveying rollers are arranged at intervals along the front-to-back direction, and the plurality of heating wire groups are divided into two rows, and the two rows of heating wire groups are arranged above and below the plurality of conveying rollers respectively; The temperature of the ink sintering zone is higher than the temperature of the preheating zone; the annealing zone is equipped with a plurality of temperature balance tubes, which are divided into two rows symmetrically arranged in an upper and lower direction; the plurality of temperature balance tubes in one row are arranged at intervals and located between the upper heating wire group and the conveying roller; the plurality of temperature balance tubes in another row are arranged at intervals and located between the lower heating wire group and the conveying roller; The temperature balance pipe is used to input cooling air into the corresponding annealing zone, and to reduce the temperature of the plurality of annealing zones in sequence from the back to the front.

2. The heating furnace for drying ink glass according to claim 1, characterized in that: The temperature balance pipe includes a cooling air exhaust pipe and two cooling air intake pipes; The cooling air discharge pipe extends in the left-right direction; one end of the cooling air inlet pipe extends outside the heating furnace to input compressed air; the other ends of the two cooling air inlet pipes extend from the left and right ends of the cooling air discharge pipe respectively and are close to the middle of the cooling air discharge pipe; the gap between the outer peripheral surface of the cooling air inlet pipe and the inner wall of the cooling air discharge pipe forms a cooling air mixing chamber; A plurality of air intake holes are provided at the top of the cooling air intake pipe located in the cooling air exhaust pipe, and the plurality of air intake holes are distributed at intervals along the length direction of the cooling air intake pipe; The outer peripheral surface of the cooling air exhaust pipe is provided with a plurality of air blowing holes arranged at intervals, and the cooling air exhaust pipe is located between two adjacent conveying rollers in the front and rear directions.

3. The heating furnace for drying ink glass according to claim 2, characterized in that: Two opposite surfaces of two cooling air exhaust pipes located in the same annealing zone and adjacent to each other are each provided with a plurality of blowing holes; The multiple air blowing holes are divided into two rows; the multiple air blowing holes in one row are spaced apart along the length direction of the cooling air exhaust pipe, and the two rows of air blowing holes are symmetrically distributed front to back along the radial direction of the cooling air exhaust pipe, and are distributed on the same horizontal plane parallel to the top surfaces of the multiple conveying rollers.

4. The heating furnace for drying ink glass according to claim 2, characterized in that: The two opposite surfaces of the two cooling air exhaust pipes located in different annealing zones and adjacent to each other in front and behind do not have the blowing through holes.

5. The heating furnace for drying ink glass according to claim 2, characterized in that: The preheating zone and the ink sintering zone are both equipped with a plurality of spiral convection tubes; The plurality of spiral convection tubes are divided into two rows symmetrically arranged in an upper and lower direction; the plurality of spiral convection tubes in one row are arranged at intervals between the upper heating wire group and the conveying roller, and the plurality of spiral convection tubes in another row are arranged at intervals between the lower heating wire group and the conveying roller; The spiral convection pipe comprises a convection air discharge pipe and a spiral air intake pipe; The convection air discharge pipe extends in the left-right direction; one end of the spiral air inlet pipe extends to the outside of the heating furnace to input compressed air; the other end of the spiral air inlet pipe is close to the left end or the right end of the convection air discharge pipe, and is coiled around the convection air discharge pipe along the outer circumference of the convection air discharge pipe, and then extends into and communicates with the inner cavity of the convection air discharge pipe at the right end or the left end of the convection air discharge pipe; A plurality of blowing nozzles are installed on the outer peripheral surface of the convection air exhaust pipe; the plurality of blowing nozzles are spaced apart along the length direction of the convection air exhaust pipe, and the blowing nozzles are located between two windings of the coiled spiral air inlet pipe; the output end of the blowing nozzle faces the gap between the two adjacent conveying rollers, and the input end of the blowing nozzle is communicated with the inner cavity of the convection air exhaust pipe.

6. The heating furnace for drying ink glass according to claim 1, characterized in that: The top of the heating furnace located in the preheating zone, the ink sintering zone and the multiple annealing zones is provided with multiple exhaust holes, and correspondingly multiple exhaust hole coverers that can be raised and lowered are installed; The exhaust hole cover is used to open and close the corresponding exhaust hole.

7. The heating furnace for drying ink glass according to claim 5, characterized in that: A plurality of air delivery pipes are also installed on the top and sides of the heating furnace located in the preheating zone, the ink sintering zone and the plurality of annealing zones; The air delivery pipe is provided with an input end and a plurality of output ends; the input end of the air delivery pipe is used to be connected with an external compressed air device to input compressed air, and the output end of the air delivery pipe is connected with one end of the cooling air intake pipe or one end of the spiral intake pipe; The air delivery pipe located at the top of the heating furnace is used to communicate with the cooling air intake pipe or the spiral intake pipe located above the conveying roller to deliver compressed air; The air delivery pipe located at the side of the heating furnace is used to communicate with the cooling air intake pipe or the spiral intake pipe located below the conveying roller to deliver compressed air.

8. The heating furnace for drying ink glass according to claim 7, characterized in that: A plurality of airflow balancing pipes are also installed on the top of the heating furnace; The multiple air conveying pipes located at the top of the heating furnace are grouped in pairs; the two air conveying pipes in a group are symmetrically distributed above the preheating zone, ink sintering zone or annealing zone; the two ends of the air flow balance pipe are respectively connected to the two input ends of the two air conveying pipes opposite to each other on the left and right, and one end of the air flow balance pipe is also used to connect with external compressed air equipment to input compressed air.

9. The heating furnace for drying ink glass according to claim 8, characterized in that: The heating furnace is also equipped with a plurality of proportional valves; The input end of the proportional valve is used to connect with external compressed air equipment to input compressed air; the output end of the proportional valve is used to connect with one end of the air flow balance pipe, or to connect with the input end of the air delivery pipe located on the side of the heating furnace.

Images