CN215176846U

CN215176846U - Horizontal rotary sintering furnace

Info

Publication number: CN215176846U
Application number: CN202120832821.7U
Authority: CN
Inventors: 李起; 何学贵
Original assignee: Nanjing Yantai Electric Heating Equipment Co ltd
Current assignee: Nanjing Yantai Electric Heating Equipment Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-12-14
Anticipated expiration: 2031-04-22

Abstract

The utility model discloses a horizontal rotary sintering furnace, which comprises a furnace shell, wherein a rotary sintering device is arranged in the furnace shell, and the rotary sintering device mainly comprises a bracket, a driven carrier roller, a driving carrier roller, a transmission chain, a driven sprocket, a driving sprocket and a servo motor; the support is provided with a plurality of supporting units, each supporting unit is internally provided with a driven carrier roller and a driving carrier roller, one end of each driving carrier roller is provided with a driven chain wheel, all the driven chain wheels are connected with the driving chain wheel through a transmission chain, and the driving chain wheel is fixedly sleeved on a motor output shaft of the servo motor. The utility model discloses can transversely horizontally put the polytetrafluoroethylene bar and carry out rotary sintering, can not produce big end of a river phenomenon at the in-process product of sintering, later stage processing does not have the waste material basically and produces, saves manufacturing cost greatly.

Description

Horizontal rotary sintering furnace

Technical Field

The utility model relates to a fritting furnace technical field, concretely relates to horizontal rotary sintering stove.

Background

Polytetrafluoroethylene (PTFE) is an engineering plastic with excellent performance, and has excellent corrosion resistance, high and low temperature resistance, chemical resistance, low friction, dielectric property, non-adhesiveness and physiological inertia, so that the PTFE becomes an indispensable special material in a plurality of fields such as chemical industry, machinery, electricity, construction, medical treatment and the like. Although PTFE is a thermoplastic resin, because PTFE has extremely high melt viscosity (1010 to 1011 pas), PTFE is difficult to process by using a standard thermoplastic molding method, and can only be processed and molded by a processing technology combining cold pressing and sintering similar to powder metallurgy. After the polytetrafluoroethylene powder is the tube-shape through high pressure forming, need be through high temperature sintering, current sintering equipment is the fritting furnace of vertical structure, and the product is vertical to be put, and the product can be heated and soften in sintering process, and under the effect of gravity, the product sinks downwards and forms big or small head, and later stage processing produces more waste material, and economic loss is great.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model provides a horizontal rotary sintering stove can transversely horizontally put the polytetrafluoroethylene bar and carry out rotary sintering, and at the in-process of sintering, the product extends evenly, can not produce big end of a river phenomenon, and later stage processing does not have the waste material basically and produces, has saved manufacturing cost greatly.

The utility model adopts the technical scheme that:

a horizontal rotary sintering furnace comprises a furnace shell, wherein a rotary sintering device is arranged in the furnace shell and mainly comprises a bracket, a driven carrier roller, a driving carrier roller, a transmission chain, a driven chain wheel, a driving chain wheel and a servo motor; the support is a rectangular frame formed by welding profile steels and is provided with a plurality of support units, each support unit is rotatably provided with a driven carrier roller and a driving carrier roller through a high-temperature-resistant bearing, and the driven carrier roller and the driving carrier roller are matched for rolling and supporting a polytetrafluoroethylene bar; one end of the driving carrier roller is provided with a driven chain wheel, the driving carrier rollers of all the supporting units are arranged adjacently, all the driven chain wheels are connected with the driving chain wheel through a transmission chain, the driving chain wheel is fixedly sleeved on a motor output shaft of the servo motor, and the servo motor is arranged at the bottom of the support.

Further, the chain transmission is provided with a tensioning sprocket for adjusting the tension of the drive chain.

Further, the tension sprocket is arranged on the outer side of the transmission chain.

Further, the both ends of passive bearing roller and initiative bearing roller all are equipped with the product limiting plate, and the product limiting plate is used for preventing to break away from the bearing roller at rotatory in-process product.

Furthermore, a chain anti-dropping plate is arranged on the outer side of the driven chain wheel and used for preventing the chain from dropping off the chain wheel in the rotating process.

Further, the furnace shell is also provided with a heating device and a hot air circulating device, the heating device is an electric heating pipe, and the hot air circulating device is a circulating fan.

The utility model has the advantages that:

1. the utility model discloses a fritting furnace can transversely horizontal put the polytetrafluoroethylene bar and carry out rotary sintering, and at the in-process of sintering, the product extends evenly, can not produce big end of a river phenomenon, and later stage processing does not have the waste material basically and produces, has saved manufacturing cost greatly, improves finished product quality.

2. The utility model discloses a sintering furnace can rotate a plurality of polytetrafluoroethylene bars of sintering simultaneously, and work efficiency is high, energy saving and consumption reduction.

Drawings

Fig. 1 is a front view of the horizontal rotary sintering furnace of the present invention (with the furnace shell omitted).

Fig. 2 is a side view of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and a preferred embodiment.

Referring to fig. 1, the embodiment provides a horizontal rotary sintering furnace, which includes a furnace shell, wherein a rotary sintering device is arranged in the furnace shell, and the rotary sintering device mainly comprises a support 1, a driven carrier roller 2, a driving carrier roller 3, a high temperature resistant bearing 4, a transmission chain 5, a driven sprocket 6, a tension sprocket 7, a servo motor 8, a chain anti-dropping plate 9 and a product limiting plate 10.

The support 1 is a rectangular frame formed by welding profile steels, the rectangular frame is fixed on the inner bottom surface of the furnace shell and comprises a plurality of supporting units consisting of cross beams and vertical beams, for example, four supporting units are arranged in the embodiment in two rows and two columns. Each supporting unit is internally provided with a driven carrier roller 2 and an active carrier roller 3, and the driven carrier roller 2 and the active carrier roller 3 are matched for rolling and supporting a polytetrafluoroethylene bar. The driven carrier roller 2 and the driving carrier roller 3 respectively comprise a roller body and roller shafts connected to two axial ends of the roller body, high-temperature-resistant bearings 4 are sleeved on the roller shafts, the driven carrier roller 2 and the driving carrier roller 3 are rotatably mounted on the support 1 through the high-temperature-resistant bearings 4, and the roller surfaces of the two roller shafts are in friction contact with the outer surface of a polytetrafluoroethylene bar.

The inner sides of the high-temperature-resistant bearings 4 at the two ends of the driven carrier roller 2 and the driving carrier roller 3 are respectively provided with a product limiting plate 10, the product limiting plates 10 are circular flat plates with through holes in the centers, the circular flat plates are sleeved and fixed on the outer surface of the carrier roller through the central through holes of the circular flat plates, and the outer diameters of the circular flat plates are larger than the outer diameter of a carrier roller body. Wherein, the outside of the high temperature resistant bearing 4 of one end of the driving carrier roller 3 is provided with a driven sprocket 6, and the outside of the driven sprocket 6 is provided with a chain anti-drop plate 9. The driven chain wheel 6 is fixedly sleeved on the roll shaft of the driving carrier roller 3 through a spline and a positioning screw to drive the driving carrier roller 3 to synchronously rotate. The chain anti-drop plate 9 is fixedly sleeved on the roll shaft through screws, and the outer diameter of the chain anti-drop plate is larger than the outer diameter of the driven chain wheel 6. The chain escape prevention plate 9 is used to prevent the chain from escaping from the sprocket during rotation. The product falling limiting plate 10 is used for preventing the product from being separated from the carrier roller in the rotating process. The sintering furnace needs to be heated to 400 ℃ at most, and the high-temperature bearing 4 is used for supporting the driving carrier roller 3 and the driven carrier roller 4.

The driving carrier rollers 3 of each supporting unit are arranged adjacently, all the driven chain wheels 6 are connected with the servo motor 8 through a transmission chain 5, the servo motor 8 is arranged at the bottom of the support 1, the driving chain wheels are fixedly sleeved on the output shaft of the motor, and the driving chain wheels, the transmission chain 5 and the driven chain wheels 6 form a chain transmission device, preferably, the chain transmission device is a toothed chain transmission device.

Preferably, the chain drive is provided with a tensioning sprocket 7 for adjusting the tension of the drive chain 5. The tension sprocket 7 is slidably disposed on the bracket 1, for example, a horizontal sliding groove is formed in the bracket 1, a central shaft of the tension sprocket 7 is slidably disposed in the horizontal sliding groove, and lock nuts are disposed at two ends of the central shaft of the tension sprocket 7, and the position of the tension sprocket 7 on the horizontal sliding groove is fixed by tightening the lock nuts. Preferably, the tension sprocket 7 is arranged on the outer side of the transmission chain 5 and is positioned between the upper support unit and the lower support unit. Because the sintering furnace needs to be heated to 400 ℃ at most, the tension degree of the chain is adjusted in advance by the tension chain wheel 7 in consideration of the extensibility of the chain, and the chain can be prevented from falling off due to extension in the rotating process.

And a heating device and a hot air circulating device are further arranged in the preferable furnace shell, the heating device can be electric heating pipes, and the electric heating pipes are uniformly distributed on the inner side wall of the furnace shell and are connected with an external power supply through leads. A temperature sensor can be arranged in the furnace shell and is interlocked with the electric heating pipe for controlling the temperature in the furnace. The hot air circulating device can be a circulating fan which is arranged on the side surface or the top surface of the furnace shell and used for homogenizing the temperature in the furnace.

All parts of the rotary sintering device are preferably made of 304 stainless steel, so that the rotary sintering device is long in service life and high in reliability.

The utility model discloses a working method is: when the temperature in the sintering furnace reaches the set temperature, which is generally 200 ℃, the servo motor 8 is started, the driving carrier roller 3 is driven to rotate through the transmission chain 5 and the driven chain wheel 6, all products are driven to synchronously rotate, and the products are placed between the driving carrier roller 3 and the driven carrier roller 2, and simultaneously the driven carrier roller 2 is driven to rotate, so that the rotary sintering of the products is realized. Because the product is transversely horizontally placed between the driving carrier roller 3 and the driven carrier roller 2 for rotary sintering, in the sintering process, the product is uniformly extended, the phenomenon of big end and small end cannot be generated, no waste is generated in later processing, and the manufacturing cost is greatly reduced.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and the improvements and modifications are also within the protection scope of the present invention.

Claims

1. A horizontal rotary sintering furnace comprises a furnace shell and is characterized in that a rotary sintering device is arranged in the furnace shell and mainly comprises a bracket, a driven carrier roller, a driving carrier roller, a transmission chain, a driven chain wheel, a driving chain wheel and a servo motor; the support is a rectangular frame formed by welding profile steels and is provided with a plurality of support units, each support unit is rotatably provided with a driven carrier roller and a driving carrier roller through a high-temperature-resistant bearing, and the driven carrier roller and the driving carrier roller are matched for rolling and supporting a polytetrafluoroethylene bar; one end of the driving carrier roller is provided with a driven chain wheel, the driving carrier rollers of all the supporting units are arranged adjacently, all the driven chain wheels are connected with the driving chain wheel through a transmission chain, the driving chain wheel is fixedly sleeved on a motor output shaft of the servo motor, and the servo motor is arranged at the bottom of the support.

2. The horizontal rotary sintering furnace according to claim 1, wherein the rotary sintering device is provided with a tension sprocket for adjusting the tension of the drive chain.

3. The horizontal rotary sintering furnace according to claim 2, wherein the tension sprocket is provided outside the drive chain.

4. The horizontal rotary sintering furnace according to claim 1, wherein both ends of the passive carrier roller and the active carrier roller are provided with product limiting plates for preventing the product from being separated from the carrier roller during rotation.

5. The horizontal rotary sintering furnace according to claim 1, wherein a chain escape preventing plate is provided on an outer side of the driven sprocket for preventing the chain from escaping from the sprocket during rotation.

6. The horizontal rotary sintering furnace according to claim 1, wherein the furnace shell is further provided with a heating device and a hot air circulating device, the heating device is an electric heating pipe, and the hot air circulating device is a circulating fan.