Sintering device for piezoresistor production

Abstract

The utility model relates to the technical field of piezoresistor production, in particular to a sintering device for piezoresistor production, which comprises a box body, a sintering device positioned in the box body and used for sintering a piezoresistor, and a waste gas treatment device positioned on one side of the top of the box body and used for treating waste gas generated in the sintering process, the sintering device comprises a furnace body located on one side in the box body, a first heating resistance wire is arranged on the inner wall of the furnace body, a sintering inner furnace barrel is arranged in the middle in the furnace body, a second heating resistance wire is arranged on the outer circumferential wall of the sintering inner furnace barrel, and a hanging frame used for hanging a piezoresistor is arranged outside the sintering inner furnace barrel located on the top in the furnace body. The varistor is sintered in an internal and external heating mode, the varistor is vertically hung between the furnace body and the sintering inner furnace barrel through the hanging frame, the varistor is heated more uniformly through the internal and external simultaneous heating mode, the sintering effect is improved, waste gas is treated through the waste gas treatment device, and the environment is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of varistor production, in particular to a sintering device for varistor production. Background Art

[0002] Varistor, also known as metal oxide semiconductor field effect transistor, is a semiconductor device with special electrical characteristics. The resistance value of varistor changes significantly with the change of applied voltage, and it is often used in overvoltage protection, overcurrent protection, lightning protection and other fields.

[0003] Sintering is required in the production process of varistors. Sintering is to put the varistor materials that have been mixed, pressed, etc. into a high-temperature environment to reach a certain temperature and time, so that one or more layers of varistor effect materials are formed on the surface. This process can make the originally loose powder particles tightly combined together and produce a certain degree of crystallinity, thus giving the material varistor characteristics.

[0004] A resistance sintering device described in the prior art includes a sintering box, wherein two symmetrically arranged first slide grooves are provided on the bottom side walls of the sintering box, first sliders are slidably connected in the two first slide grooves, a box door is fixedly connected to the side wall between the two first sliders, the box door passes through the side walls of the sintering box and is fixedly connected to a sealing plate, two locking devices are provided on the sealing plate, a first sealing strip is fixedly connected to the left side wall of the box door, two fourth sealing strips are fixedly connected to the upper and lower side walls of the box door, two pressing devices are provided on the sintering box, a resistor placing device is provided inside the sintering box, a heating plate is fixedly connected to the inner side walls of the sintering box, and a plurality of supporting legs are fixedly connected to the bottom side walls of the sintering box.

[0005] The resistance sintering device mentioned above is simple to operate and easy to use. However, in the current prior art, since the sintering device is single-sided, it is easy to cause uneven sintering, affecting the sintering effect. In addition, waste gas is generated during the sintering process, and the waste gas is not treated, resulting in impurities remaining in the gas affecting the surrounding environment. Utility Model Content

[0006] The purpose of the utility model is to provide a sintering device for producing a varistor to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A sintering device for producing a varistor comprises a box body, a sintering device located inside the box body for sintering the varistor, and a waste gas treatment device located on one side of the top of the box body for treating waste gas generated during the sintering process. The sintering device comprises a furnace body located on one side of the inside of the box body, a first heating resistance wire is arranged on the inner wall of the furnace body, a sintering inner furnace drum is arranged in the middle of the furnace body, a second heating resistance wire is arranged on the outer circumferential wall of the sintering inner furnace drum, and a suspension frame for suspending the varistor is arranged outside the sintering inner furnace drum located at the top of the furnace body.

[0009] As a preferred solution of the utility model, an exhaust hole is provided at the top of the furnace body, an exhaust fan is provided on the box body at the top of the exhaust hole, and the exhaust hole is connected to the exhaust fan air inlet through a connecting pipe.

[0010] As a preferred solution of the utility model, the exhaust gas treatment device includes an adsorption filter box, an activated carbon filter plate and a spray filter box. Three activated carbon filter plates are provided. The three activated carbon filter plates are installed inside the adsorption filter box. One side of the adsorption filter box is connected to the spray filter box through an exhaust pipe.

[0011] As a preferred solution of the utility model, a spray water inlet is provided on the top of the spray filter box, a spray head is connected to the bottom of the spray water inlet, the spray head is installed at the top of the spray filter box, a clean air exhaust window is provided on the upper side of the spray filter box away from the adsorption filter box, the spray water inlet is connected to an external water supply device, and the bottom of the spray filter box is connected to a water pool through a pipe.

[0012] As a preferred solution of the utility model, a transparent observation door is provided on the outer wall of the box body on one side of the furnace body, and a temperature control display screen is provided on the outer wall of the box body on one side of the transparent observation door.

[0013] As a preferred solution of the utility model, the first heating resistance wire and the second heating resistance wire are connected to the temperature-controlled display screen through a wire, and the temperature-controlled display screen is connected to an external power supply device through a wire.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In response to the problems raised in the background technology, the present application adopts an internal and external heating method to sinter the varistor. The varistor is vertically suspended between the furnace body and the sintering inner furnace drum through a suspension frame. By heating the inside and outside at the same time, the varistor is heated more evenly, thereby improving the sintering effect.

[0016] The gas discharged from the exhaust hole is adsorbed and filtered by the activated carbon filter plate inside the adsorption filter box. After adsorption and filtration, the gas enters the spray filter box and is sprayed and filtered through the nozzle inside the spray filter box to further filter the waste gas to prevent the waste gas generated during the sintering process from affecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0018] Figure 2 It is a three-dimensional schematic diagram of the overall box of the utility model;

[0019] Figure 3 This is a top view of the integral sintering device of the utility model;

[0020] Figure 4 This is a schematic diagram of the connection between the adsorption filter box and the spray filter box of the utility model;

[0021] Figure 5 It is a schematic diagram of the activated carbon filter plate of the utility model.

[0022] In the figure: 1. box body; 2. sintering device; 11. furnace body; 111. first heating resistance wire; 12. sintering inner furnace barrel; 121. second heating resistance wire; 13. hanging rack; 14. exhaust hole; 15. exhaust fan; 3. exhaust gas treatment device; 31. adsorption filter box; 32. activated carbon filter plate; 33. spray filter box; 331. spray water inlet; 16. transparent observation door; 17. temperature control display screen. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Example

[0024] See also Figure 1-5The utility model provides a technical solution: a sintering device for producing a varistor, comprising a box body 1, a sintering device 2 located inside the box body 1 for sintering the varistor, and a waste gas treatment device 3 located on the top side of the box body 1 for treating waste gas generated during the sintering process. The sintering device 2 comprises a furnace body 11 located on one side of the inside of the box body 1, a first heating resistance wire 111 is arranged on the inner wall of the furnace body 11, a sintering inner furnace drum 12 is arranged in the middle of the furnace body 11, and the outer wall of the sintering inner furnace drum 12 is provided with a first heating resistance wire 111. A second heating resistor wire 121 is arranged on the circumferential wall, and a hanging frame 13 for hanging the varistor is arranged outside the sintering inner furnace drum 12 at the top of the furnace body 11; a transparent observation door 16 is arranged on the outer wall of the box body 1 on one side of the furnace body 11, and a temperature control display screen 17 is arranged on the outer wall of the box body 1 on one side of the transparent observation door 16; the first heating resistor wire 111 and the second heating resistor wire 121 are connected to the temperature control display screen 17 through wires, and the temperature control display screen 17 is connected to an external power supply device through wires.

[0025] It should be noted that the present application adopts an internal and external heating method to sinter the varistor. The varistor is vertically suspended between the furnace body 11 and the sintering inner furnace barrel 12 through a suspension frame 13. By heating the inside and outside at the same time, the varistor is heated more evenly, thereby improving the sintering effect.

[0026] Furthermore, a first heating resistor wire 111 is arranged on the inner wall of the furnace body 11, a sintering inner furnace drum 12 is arranged in the middle part of the furnace body 11, a second heating resistor wire 121 is arranged on the outer circumferential wall of the sintering inner furnace drum 12, and a hanging frame 13 for hanging the varistor is arranged on the outside of the sintering inner furnace drum 12. The varistor is suspended by the hanging frame 13. The varistor is vertically located between the furnace body 11 and the sintering inner furnace drum 12. One side of the varistor is close to the sintering inner furnace drum 12, and the other side is close to the furnace body 11. By heating both inside and outside at the same time, the varistor is heated more evenly, thereby improving the sintering effect.

[0027] See also Figure 2 , 4and 5. An exhaust hole 14 is provided at the top of the furnace body 11, and an exhaust fan 15 is provided on the box body 1 at the top of the exhaust hole 14. The exhaust hole 14 is connected to the air inlet of the exhaust fan 15 through a connecting pipe; the exhaust gas treatment device 3 includes an adsorption filter box 31, an activated carbon filter plate 32 and a spray filter box 33. Three activated carbon filter plates 32 are provided. The three activated carbon filter plates 32 are installed inside the adsorption filter box 31, and one side of the adsorption filter box 31 is connected to the spray filter box 33 through an exhaust pipe; a spray water inlet 331 is provided at the top of the spray filter box 33, and a spray head is connected to the bottom of the spray water inlet 331. The spray head is installed at the top of the spray filter box 33, and a clean air exhaust window is provided on the upper side of the spray filter box 33 away from the adsorption filter box 31. The spray water inlet 331 is connected to an external water supply device, and the bottom of the spray filter box 33 is connected to a water pool through a pipeline.

[0028] It should be noted that, in this embodiment, the waste gas generated during the sintering process is discharged through the exhaust hole 14, and the exhaust fan 15 guides the waste gas discharged from the exhaust hole 14 into the adsorption filter box 31 for filtration and adsorption;

[0029] Furthermore, the mesh numbers of the three activated carbon filter plates 32 gradually increase. Filter materials with different mesh numbers have different degrees of filtering capabilities, so using a variety of filter materials can make the entire system more effective. A coarser filter mesh can capture larger particles, while a finer mesh can better capture smaller particles;

[0030] Furthermore, the filtered gas enters the spray filter box 33 and is spray-filtered by the nozzle inside the spray filter box 33, so as to further filter the waste gas and prevent the waste gas generated during the sintering process from affecting the environment.

[0031] The utility model workflow:

[0032] When in use, a hanging frame 13 for hanging the varistor is provided on the outside of the sintering inner furnace drum 12. The varistor is hung by the hanging frame 13. The varistor is vertically located between the furnace body 11 and the sintering inner furnace drum 12. One side of the varistor is close to the sintering inner furnace drum 12, and the other side is close to the furnace body 11. The first heating resistor 111 and the second heating resistor 121 power supply equipment are started, and the temperature control is adjusted by the temperature control display screen 17. By heating the inside and outside at the same time, the varistor is heated more evenly and the sintering effect is improved. The exhaust gas generated during the sintering process is discharged through the exhaust hole 14. The exhaust fan 15 guides the exhaust gas discharged from the exhaust hole 14 into the adsorption filter box 31 for filtering and adsorption. The mesh numbers of the three activated carbon filter plates 32 gradually increase. Filter materials with different mesh numbers have different degrees of filtering capabilities. Therefore, using a variety of filter materials can make the entire system more effective. A coarser filter mesh can capture larger particles, while a finer filter mesh can better capture smaller particles. The filtered gas enters the spray filter box 33 and is sprayed and filtered through the nozzle inside the spray filter box 33 to further filter the waste gas to prevent the waste gas generated during the sintering process from affecting the environment.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sintering device for producing a varistor, comprising a box (1), a sintering device (2) located inside the box (1) for sintering the varistor, and a waste gas treatment device (3) located on one side of the top of the box (1) for treating waste gas generated during the sintering process, characterized in that: The sintering device (2) comprises a furnace body (11) located on one side of the interior of the box body (1), a first heating resistance wire (111) being arranged on the inner wall of the furnace body (11), a sintering inner furnace drum (12) being arranged in the middle of the furnace body (11), a second heating resistance wire (121) being arranged on the outer circumferential wall of the sintering inner furnace drum (12), and a suspension frame (13) for suspending the varistor being arranged on the outside of the sintering inner furnace drum (12) at the top of the furnace body (11).

2. A sintering device for producing a varistor according to claim 1, characterized in that: An exhaust hole (14) is provided at the top of the furnace body (11); an exhaust fan (15) is provided on the box body (1) at the top of the exhaust hole (14); and the exhaust hole (14) is connected to an air inlet of the exhaust fan (15) via a connecting pipe.

3. The sintering device for producing a varistor according to claim 1, characterized in that: The exhaust gas treatment device (3) comprises an adsorption filter box (31), an activated carbon filter plate (32) and a spray filter box (33), wherein three activated carbon filter plates (32) are provided, and the three activated carbon filter plates (32) are installed inside the adsorption filter box (31), and one side of the adsorption filter box (31) is connected to the spray filter box (33) through an exhaust pipe.

4. A sintering device for producing a varistor according to claim 3, characterized in that: The top of the spray filter box (33) is provided with a spray water inlet (331), the bottom of the spray water inlet (331) is connected to a spray head, the spray head is installed at the top of the spray filter box (33), a clean air exhaust window is provided above a side of the spray filter box (33) away from the adsorption filter box (31), the spray water inlet (331) is connected to an external water supply device, and the bottom of the spray filter box (33) is connected to a water pool through a pipeline.

5. The sintering device for producing a varistor according to claim 1, characterized in that: A transparent observation door (16) is provided on the outer wall of the box body (1) on one side of the furnace body (11), and a temperature control display screen (17) is provided on the outer wall of the box body (1) on one side of the transparent observation door (16).

6. The sintering device for producing a varistor according to claim 5, characterized in that: The first heating resistance wire (111) and the second heating resistance wire (121) are connected to the temperature control display screen (17) via wires, and the temperature control display screen (17) is connected to an external power supply device via wires.

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