Capacitor porcelain bushing insulator sintering kiln

Abstract

The invention discloses a sintering kiln for a capacitor porcelain bushing insulator. The sintering kiln comprises a kiln body and a heat recycling mechanism, a fire-resistant lining plate is arranged in the furnace body, a hollow flow guide plate wraps the outer side face of the fire-resistant lining plate, spiral flow guide pieces are arranged in the hollow flow guide plate, air pipes are arranged at air outlets in the inner side face of the hollow flow guide plate respectively, the air pipes penetrate through through holes in the surface of the fire-resistant lining plate respectively, an electric heating pipe is installed in the middle of the interior of the furnace body, and a PLC is arranged at the right end of the furnace body. The input end of the PLC is electrically connected to an external power supply, and the input end of the electric heating tube is electrically connected to the output end of the PLC; according to the sintering kiln for the porcelain bushing insulator of the capacitor, hot air is guided to flow around a porcelain bushing insulator blank along a spiral track, the porcelain bushing insulator blank is accurately and uniformly heated in the sintering process, the sintering effect of the porcelain bushing insulator blank is improved, and the production quality of the porcelain bushing insulator of the capacitor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor porcelain sleeve insulators, in particular to a capacitor porcelain sleeve insulator sintering kiln. Background Art

[0002] Ceramic capacitor insulator is an insulating material used for capacitors, which can provide electrical insulation and mechanical support functions for capacitors. It is made of pure ceramic material, has excellent electrical insulation performance and high temperature resistance, and is suitable for power equipment in high voltage and high temperature environments. In the production process of capacitor porcelain sleeve insulators, a sintering furnace is needed to sinter the capacitor porcelain sleeve insulator embryo. The embryo is oxidized, melted, dissolved and recrystallized at high temperature by heat, thereby achieving the bonding between the embryo raw material particles and ensuring the production quality of the capacitor porcelain sleeve insulator. In the prior art, when sintering the capacitor porcelain sleeve insulator embryo, resistance heating is often used to heat the embryo by the heat generated by the power supply of the electric heating tube. During the heating process, the position of the electric heating tube is fixed. Because different positions are at different distances from the electric heating tube, the degree of heating is also different, resulting in low uniformity of heating of the capacitor porcelain sleeve insulator embryo. Even if some sintering kilns conduct heat through air flow to make the embryo heat more uniform, the air flow path is variable and the surface of the embryo cannot be accurately heated uniformly, affecting the production quality of the capacitor porcelain sleeve insulator. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a capacitor porcelain sleeve insulator sintering kiln to guide hot air to flow along a spiral trajectory around the porcelain sleeve insulator blank, accurately and evenly heat the porcelain sleeve insulator blank during the sintering process, improve the production quality of the capacitor porcelain sleeve insulator, and effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a capacitor porcelain sleeve insulator sintering kiln, comprising a furnace body and a heat recycling mechanism;

[0005] Furnace body: a refractory lining is arranged inside the furnace, a hollow guide plate is wrapped on the outer side of the refractory lining, a spiral guide plate is arranged inside the hollow guide plate, air ducts are arranged at the air outlets on the inner side of the hollow guide plate, and the air ducts pass through the through holes on the surface of the refractory lining respectively. An electric heating pipe is installed in the middle of the furnace body, and a PLC controller is arranged at the right end of the furnace body. The input end of the PLC controller is electrically connected to an external power supply, and the input end of the electric heating pipe is electrically connected to the output end of the PLC controller;

[0006] Heat recycling mechanism: It is set in the middle of the furnace body, guiding the hot air to flow along the spiral trajectory around the porcelain sleeve insulator blank, accurately making the porcelain sleeve insulator blank evenly heated during the sintering process, increasing the sintering effect of the porcelain sleeve insulator blank, improving the production quality of the capacitor porcelain sleeve insulator, recycling the heat, reducing the energy consumption of the sintering kiln, guiding the air to flow along the axis of the sintering kiln during the drying and cooling process, timely taking away the heat and moisture from the porcelain sleeve insulator blank, and improving the drying and cooling efficiency of the capacitor porcelain sleeve insulator blank.

[0007] Furthermore, the heat recycling mechanism includes baffles, which are longitudinally slidably connected to the slide grooves at the left and right ends of the furnace body, and the baffles pass through the give-way holes on the surface of the refractory lining. The baffles are respectively located on the left and right sides of the hollow guide plate, closing the left and right ends of the furnace body to facilitate guiding the flow trajectory of the air.

[0008] Furthermore, the heat recycling mechanism also includes an adjusting screw and a motor. The adjusting screw is rotatably connected between the inner side surface of the furnace body and the outer side surface of the refractory lining, and the adjusting screw is threadedly connected to adjacent baffles. The motor is respectively arranged at the front and rear ends of the furnace body, and the output shaft of the motor is fixedly connected to the adjacent adjusting screws. The input end of the motor is electrically connected to the output end of the PLC controller to provide power for the movement of the baffle.

[0009] Furthermore, the heat recycling mechanism also includes a connecting pipe and air holes. The connecting pipe is respectively arranged between two baffles corresponding to the lateral position. The baffles are all hollow baffles. The connecting pipe is connected to the inside of the baffle to allow air to flow and recycle the heat.

[0010] Furthermore, the heat recycling mechanism also includes a guide pipe and a guide fan. The guide pipes are respectively connected in series to the middle of the connecting pipes. The guide fans are arranged inside the guide pipes. The input end of the guide fan is electrically connected to the output end of the PLC controller to provide power for the flow of air.

[0011] Furthermore, a heat insulation cover is provided on the upper end of the outer side surface of the hollow guide plate, the heat insulation cover is located inside the furnace body, and the electric heating pipes are respectively arranged at the front and rear ends of the heat insulation cover to reduce heat loss.

[0012] Furthermore, a circulating air duct is provided at the circulating connection port on the upper end of the hollow guide plate, and an electric fan is provided inside the circulating air duct on the right side. The input end of the electric fan is electrically connected to the output end of the PLC controller to provide power for the flow of air in the sintering space.

[0013] Furthermore, an electric conveyor belt is provided at the lower end of the furnace body, the upper end of the electric conveyor belt passes through the interior of the refractory lining, and the input end of the electric conveyor belt is electrically connected to the output end of the PLC controller to provide power for the movement of the capacitor porcelain sleeve insulator blank.

[0014] Furthermore, a fan 1 is provided at the air inlet at the left end of the front and rear sides of the furnace body, and a fan 2 is provided at the air exhaust port at the right end of the front and rear sides of the furnace body. The input ends of fan 1 and fan 2 are electrically connected to the output of the PLC controller to reduce the discharge of hot air from the right end of the furnace body, making it convenient for personnel to load materials at the right end of the furnace body.

[0015] Furthermore, a temperature sensor is provided inside each of the refractory linings, and an output end of the temperature sensor is electrically connected to an input end of the PLC controller to detect the temperature inside the refractory lining.

[0016] Compared with the prior art, the invention has the following beneficial effects: the capacitor porcelain sleeve insulator sintering kiln has the following advantages:

[0017] 1. During the production process of capacitor porcelain sleeve insulators, the porcelain sleeve insulator blank is transported to the sintering position of the furnace body, the motor is started through the PLC controller, the baffle is moved, the left and right ends of the furnace body are closed, and then the electric heating tube is started to heat the air, and the electric fan is started. Under the guidance of the hollow guide plate and the spiral guide plate, the hot air flows around the porcelain sleeve insulator blank along the spiral trajectory into the sintering space, and the hot air is guided to flow around the porcelain sleeve insulator blank along the spiral trajectory, so that the porcelain sleeve insulator blank is accurately and evenly heated during the sintering process, the sintering effect of the porcelain sleeve insulator blank is increased, and the production quality of the capacitor porcelain sleeve insulator is improved.

[0018] 2. After sintering is completed, the guide fan is started through the PLC controller to guide the external air into the furnace body from the opening at the left end of the furnace body to cool the sintered porcelain sleeve insulator blank. The air after absorbing heat is transported through the air holes on the left, the inside of the baffle on the left, the connecting pipe and the baffle on the right, and finally blown out from the air holes on the right. The hot air generated by cooling is used to dry the porcelain sleeve insulator blank at the right end of the furnace body, and the heat is recycled to reduce the energy consumption of the sintering kiln. The air is guided to flow along the axis of the sintering kiln during the drying and cooling process, and the heat and moisture are taken away from the porcelain sleeve insulator blank in time, so as to improve the drying and cooling efficiency of the capacitor porcelain sleeve insulator blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the overall device of the present invention in a top view;

[0021] Figure 3 This is a schematic diagram of the enlarged structure of location A of the present invention;

[0022] Figure 4 It is a structural schematic diagram of a front cross-section of a hollow guide plate of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the side cross-section of the hollow guide plate of the present invention.

[0024] In the figure: 1 furnace body, 2 refractory lining, 3 hollow guide plate, 4 spiral guide plate, 5 air outlet pipe, 6 electric heating pipe, 7 heat recycling mechanism, 71 baffle, 72 adjusting screw, 73 motor, 74 connecting pipe, 75 air hole, 76 guide pipe, 77 guide fan, 8 heat insulation cover, 9 electric fan, 10 PLC controller, 11 electric conveyor belt, 12 fan 1, 13 fan 2, 14 circulation air duct, 15 temperature sensor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-5 , This embodiment provides a technical solution: a capacitor porcelain sleeve insulator sintering kiln, including a furnace body 1 and a heat recycling mechanism 7;

[0027] Furnace body 1: a refractory lining 2 is arranged inside the furnace body 1 to reduce the influence of high temperature on the furnace body 1. The outer side of the refractory lining 2 is wrapped with a hollow guide plate 3. A spiral guide plate 4 is arranged inside the hollow guide plate 3. Air ducts 5 are arranged at the air outlets on the inner side of the hollow guide plate 3. The air ducts 5 pass through the through holes on the surface of the refractory lining 2 to guide the flow path of the hot air, so that the hot air enters the sintering space along a spiral trajectory around the porcelain sleeve insulator embryo, and the porcelain sleeve insulator embryo is heated more evenly. An electric heating tube 6 is installed in the middle of the furnace body 1 to provide a sintering condition for the porcelain sleeve insulator embryo. The right end of the furnace body 1 is provided with a PLC controller 10 to control the start and stop of the whole device. The input end of the PLC controller 10 is electrically connected to the external power supply, and the input end of the electric heating tube 6 is electrically connected to the output end of the PLC controller 10. The upper end of the outer surface of the hollow guide plate 3 is provided with a heat insulation cover 8, and the heat insulation cover 8 is located inside the furnace body 1. The electric heating tube 6 is respectively arranged at the front and rear ends of the heat insulation cover 8 to reduce heat loss and reduce energy consumption. The circulation connection port at the upper end of the hollow guide plate 3 is provided with a circulation duct 14, and an electric fan is arranged inside the circulation duct 14 on the right side. 9, the input end of the electric fan 9 is electrically connected to the output end of the PLC controller 10, providing power for the circulation of hot air in the sintering space, the lower end of the furnace body 1 is provided with an electric conveyor belt 11, the upper end of the electric conveyor belt 11 passes through the interior of the refractory lining 2, the input end of the electric conveyor belt 11 is electrically connected to the output end of the PLC controller 10, and the porcelain sleeve insulator blank is transported, and the surface of the belt body of the electric conveyor belt 11 is respectively provided with a clearance through hole installed in cooperation with the air duct 5, and the air inlet of the left end of the front and rear sides of the furnace body 1 is provided with a fan 12, and the front and rear sides of the furnace body 1 are provided with a fan 12. The exhaust port on the right end of the surface is provided with a fan 2 13, and the input ends of the fan 12 and the fan 2 13 are electrically connected to the output end of the PLC controller 10. The fan 12 is started to allow the external air to enter the furnace body 1 from the front and rear sides to improve the cooling uniformity. The fan 2 13 is started to allow the dry hot air to be discharged from the front and rear sides to facilitate the personnel to load the right end of the furnace body 1. The interior of the refractory lining 2 is provided with a temperature sensor 15, and the output end of the temperature sensor 15 is electrically connected to the input end of the PLC controller 10 to detect the temperature inside the refractory lining 2;

[0028] Heat recycling mechanism 7: arranged in the middle of the furnace body 1, the heat recycling mechanism 7 includes baffles 71, the baffles 71 are longitudinally slidably connected to the slide grooves at the left and right ends of the furnace body 1, the baffles 71 pass through the clearance holes on the surface of the refractory lining 2, the baffles 71 are respectively located on the left and right sides of the hollow guide plate 3, the baffles 71 are all heat insulation plates, and the left and right ends of the furnace body 1 are closed by the cooperation of the two baffles 71 corresponding to the front and rear positions, so as to reduce the temperature loss in the sintering space to the outside, and the heat recycling mechanism 7 also includes an adjusting screw 72 and a motor 73, and the adjusting screw 7 2 are respectively rotatably connected between the inner side of the furnace body 1 and the outer side of the refractory lining 2, the adjusting screw rods 72 are respectively threadedly connected with the adjacent baffles 71, the motors 73 are respectively arranged at the front and rear ends of the furnace body 1, the output shafts of the motors 73 are respectively fixedly connected with the adjacent adjusting screw rods 72, the input end of the motor 73 is electrically connected to the output end of the PLC controller 10, and provides power for the forward and backward movement of the baffles 71, the heat recycling mechanism 7 also includes a connecting pipe 74 and an air hole 75, the connecting pipe 74 is respectively arranged between the two baffles 71 corresponding to the lateral position, and the baffles 71 are respectively arranged between the two baffles 71 corresponding to the lateral position. 1 are hollow baffles, the connecting pipe 74 is connected to the inside of the baffle 71, the connecting pipe 74 is composed of three pipes, the heat recycling mechanism 7 also includes a guide pipe 76 and a guide fan 77, the guide pipes 76 are respectively connected in series to the middle of the connecting pipe 74, and the guide fans 77 are arranged inside the guide pipes 76, the input end of the guide fan 77 is electrically connected to the output end of the PLC controller 10, the guide fan 77 is started to guide the air to flow, and the external air enters the furnace body 1 from the opening at the left end of the furnace body 1 to cool the sintered porcelain sleeve insulator embryo, and absorb The air after receiving heat passes through the air hole 75 on the left, the inside of the baffle 71 on the left, the connecting pipe 74 and the inside of the baffle 71 on the right, and is finally blown out from the air hole 75 on the right. The hot air generated by cooling is used to dry the porcelain sleeve insulator blank at the right end of the furnace body 1, thereby reducing the water content of the porcelain sleeve insulator blank and ensuring the subsequent sintering quality. At the same time, during the drying and cooling process, the air flows along the axis of the furnace body 1, and promptly takes away heat and moisture from the porcelain sleeve insulator blank, thereby improving the drying and cooling efficiency of the porcelain sleeve insulator blank while ensuring drying and cooling.

[0029] The working principle of a capacitor porcelain sleeve insulator sintering kiln provided by the present invention is as follows: in the process of producing capacitor porcelain sleeve insulators, the porcelain sleeve insulator blank is placed on the right end of the upper surface of the electric conveyor belt 11, and the electric conveyor belt 11 is started by the PLC controller 10 to convey the porcelain sleeve insulator blank to the left, so that the porcelain sleeve insulator blank enters the interior of the refractory lining 2 until the porcelain sleeve insulator blank is located between two baffles 71 corresponding to the lateral position, and the motor 73 is started. The output shaft of the motor 73 drives the adjusting screw 72 to rotate, and the adjusting screw 72 is connected to the baffle 71 through the threaded connection, and the kiln is opened. Under the limit of the slide groove of the furnace body 1, the two baffles 71 corresponding to the longitudinal position move relatively until the two baffles 71 fit together to close the left and right ends of the furnace body 1, and then start the electric heating tube 6 to heat the air between the heat insulation cover 8 and the hollow guide plate 3 by using the electric heating tube 6, start the electric fan 9 to guide the hot air from the right circulation air duct 14 into the hollow guide plate 3. During the hot air flowing inside the hollow guide plate 3, under the guidance of the spiral guide plate 4, the hot air is blown out from the right air duct 5, and the hot air goes around the porcelain sleeve insulator blank along a spiral trajectory into the sintering space, and then from the left The air duct 5 on the side and the circulating air duct 14 on the left side return to between the heat insulation cover 8 and the hollow guide plate 3 to make the air circulate and the porcelain sleeve insulator embryo body be heated more evenly. When the porcelain sleeve insulator embryo body is sintered, the motor 73 is started to relatively separate the baffles 71, and the electric conveyor belt 11 is started to move the sintered porcelain sleeve insulator embryo body to the left end of the furnace body 1. At the same time, the new porcelain sleeve insulator embryo body enters the sintering space. After being sealed with the baffle 71, the guide fan 77 is started to guide the air to flow, and the external air enters the furnace body 1 from the opening at the left end of the furnace body 1, which heats the sintered porcelain sleeve insulator embryo body. The sleeve insulator blank is cooled, and the air after absorbing heat is transported through the air hole 75 on the left, the inside of the baffle 71 on the left, the connecting pipe 74 and the baffle 71 on the right, and finally blown out from the air hole 75 on the right. The hot air generated by the cooling is used to dry the porcelain sleeve insulator blank at the right end of the furnace body 1, thereby reducing the water content of the porcelain sleeve insulator blank and ensuring the subsequent sintering quality. At the same time, during the drying and cooling process, the air flows along the axis of the furnace body 1, and promptly takes away the heat and moisture from the porcelain sleeve insulator blank, thereby improving the drying and cooling efficiency of the porcelain sleeve insulator blank while ensuring drying and cooling.

[0030] It is worth noting that the PLC controller 10 disclosed in the above embodiment can use a TPC8-8TD model PLC controller, and the electric heating pipe 6, motor 73, guide fan 77, electric fan 9, fan 12, fan 2 13, electric conveyor belt 11 and temperature sensor 15 can be freely configured according to the actual application scenario. The electric heating pipe 6 can use a 306 model electric heating pipe, the motor 73 can use a 42BYHJ01 model stepping reduction motor, the guide fan 77, electric fan 9, fan 12 and fan 2 13 can all use FD4007 model fans, the electric conveyor belt 11 can use RF-PDSSJ model electric conveyor belt, the temperature sensor 15 can use IMG-5449 model temperature sensor, and the PLC controller 10 controls the electric heating pipe 6, motor 73, guide fan 77, electric fan 9, fan 12, fan 2 13, electric conveyor belt 11 and temperature sensor 15 using methods commonly used in the prior art.

[0031] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A capacitor porcelain insulator sintering kiln, characterized by: It comprises a furnace body (1) and a heat recycling mechanism (7); A furnace body (1): a refractory lining (2) is provided inside the furnace body, a hollow guide plate (3) is wrapped around the outer side of the refractory lining (2), a spiral guide plate (4) is provided inside the hollow guide plate (3), air ducts (5) are provided at the air outlets on the inner side of the hollow guide plate (3), and the air ducts (5) pass through the through holes on the surface of the refractory lining (2), an electric heating pipe (6) is installed in the middle of the furnace body (1), a PLC controller (10) is provided at the right end of the furnace body (1), an input end of the PLC controller (10) is electrically connected to an external power supply, and an input end of the electric heating pipe (6) is electrically connected to an output end of the PLC controller (10); Heat recycling mechanism (7): arranged in the middle of the furnace body (1).

2. A capacitor porcelain insulator sintering kiln according to claim 1, characterized in that: The heat recycling mechanism (7) comprises a baffle (71), wherein the baffle (71) is longitudinally slidably connected to the slide grooves at the left and right ends of the furnace body (1), and the baffle (71) passes through the clearance holes on the surface of the refractory lining (2), and the baffle (71) is located on the left and right sides of the hollow guide plate (3).

3. A capacitor porcelain insulator sintering kiln according to claim 2, characterized in that: The heat recycling mechanism (7) also includes an adjusting screw (72) and a motor (73); the adjusting screw (72) is rotatably connected between the inner side surface of the furnace body (1) and the outer side surface of the refractory lining (2); the adjusting screw (72) is threadedly connected to the adjacent baffles (71); the motor (73) is respectively arranged at the front and rear ends of the furnace body (1); the output shaft of the motor (73) is fixedly connected to the adjacent adjusting screw (72); and the input end of the motor (73) is electrically connected to the output end of the PLC controller (10).

4. A capacitor porcelain insulator sintering kiln according to claim 2, characterized in that: The heat recycling mechanism (7) further comprises a connecting pipe (74) and an air hole (75); the connecting pipe (74) is respectively arranged between two baffles (71) corresponding to each other in a transverse position; the baffles (71) are all hollow baffles; and the connecting pipe (74) is in communication with the inside of the baffles (71).

5. A capacitor porcelain insulator sintering kiln according to claim 4, characterized in that: The heat recycling mechanism (7) further comprises a guide pipe (76) and a guide fan (77); the guide pipes (76) are respectively connected in series to the middle of the connecting pipe (74); a guide fan (77) is provided inside the guide pipe (76); and an input end of the guide fan (77) is electrically connected to an output end of the PLC controller (10).

6. A capacitor porcelain insulator sintering kiln according to claim 1, characterized in that: A heat insulation cover (8) is provided at the upper end of the outer surface of the hollow guide plate (3), the heat insulation cover (8) is located inside the furnace body (1), and the electric heating pipe (6) is respectively arranged at the front and rear ends of the heat insulation cover (8).

7. The capacitor porcelain insulator sintering kiln according to claim 1, characterized in that: A circulation duct (14) is provided at the circulation connection port at the upper end of the hollow guide plate (3), an electric fan (9) is provided inside the right circulation duct (14), and an input end of the electric fan (9) is electrically connected to an output end of a PLC controller (10).

8. The capacitor porcelain insulator sintering kiln according to claim 1, characterized in that: An electric conveyor belt (11) is provided at the lower end of the furnace body (1), the upper end of the electric conveyor belt (11) passes through the interior of the refractory lining (2), and the input end of the electric conveyor belt (11) is electrically connected to the output end of the PLC controller (10).

9. The capacitor porcelain insulator sintering kiln according to claim 1, characterized in that: A fan 1 (12) is provided at the air inlet at the left end of the front and rear sides of the furnace body (1), and a fan 2 (13) is provided at the air outlet at the right end of the front and rear sides of the furnace body (1). The input ends of the fan 1 (12) and the fan 2 (13) are electrically connected to the output end of the PLC controller (10).

10. The capacitor porcelain insulator sintering kiln according to claim 1, characterized in that: A temperature sensor (15) is provided inside each of the refractory linings (2), and an output end of the temperature sensor (15) is electrically connected to an input end of the PLC controller (10).

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