CN209944994U

CN209944994U - Push-down fritting furnace

Info

Publication number: CN209944994U
Application number: CN201920680123.2U
Authority: CN
Inventors: 苏凤戈; 施鹏; 郑玉平
Original assignee: WENLING HENGFENG POWDER METALLURGY Co Ltd
Current assignee: WENLING HENGFENG POWDER METALLURGY Co Ltd
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2020-01-14
Anticipated expiration: 2029-05-13

Abstract

The utility model provides a push-down fritting furnace. The push-rod type sintering furnace comprises a preheating section, a sintering section and a cooling section which are sequentially communicated, wherein the preheating section and the sintering section are distributed along the left-right direction, the cooling section comprises a cooling chamber, a fan and a heat exchanger, the cooling chamber comprises a discharge port and a feed port which is used for being communicated with the tail end of the sintering section, a first door and a second door are respectively installed at the feed port and the discharge port, an outlet of the heat exchanger is communicated with an inlet of the fan, the cooling chamber is arranged on the front side or the rear side of the sintering section, the feed port is arranged between the sintering section and the cooling chamber, an air inlet and an air outlet are respectively arranged at the top and the bottom of the cooling chamber, the air inlet is communicated with an outlet of the fan through; the sintering furnace also comprises a feeding mechanism for feeding the workpiece at the tail end of the sintering section into the cooling chamber through the feeding hole and a material pushing mechanism for sending the workpiece in the cooling chamber out of the cooling chamber through the discharging hole. The push rod type sintering furnace has low energy consumption.

Description

Push-down fritting furnace

Technical Field

The utility model relates to a push-down fritting furnace, especially a push-down fritting furnace to powder metallurgy sintering.

Background

The push rod type sintering furnace realizes high-temperature sintering by pushing the graphite boat with a hydraulic machine, the graphite boat has low manufacturing cost, can bear the cold and hot impact of temperature, and has long service life. The graphite furnace can be well produced as long as the graphite furnace is not broken in the sintering use process, and is widely applied to sintering. However, the heat specific capacity of graphite is large, and the boat has a large volume to bear a certain forward thrust, so that the cooling speed is low, and the cooling section is required to be long.

The existing sintering furnace is like a full-automatic push rod type sintering furnace disclosed in the Chinese patent library (application number: 201811223648.X ], which comprises a low-temperature section, a high-temperature section and a cooling section which are communicated in sequence; the length ratio of the low-temperature section to the high-temperature section to the cooling section is 3-3.6: 7-8.4: 4, the low-temperature section comprises three low-temperature areas; the high-temperature section comprises seven high-temperature regions; the cooling section comprises two cooling zones; the length of the low-temperature area and the high-temperature area is 1-1.2m, and the length of the cooling area is 2 m.

The sintering furnace described above has a problem: the workpiece motion is continuous linear motion, if rapid cooling is used, cooling air flow (the air temperature is generally about 40 ℃) can inevitably blow to a high-temperature section during cooling, in order to offset the influence of low air flow, the heating power of a sintering section is increased in design and use, unnecessary energy consumption is increased, and resource waste is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems of the prior art and providing a push-down sintering furnace, and the technical problem of solving is how to reduce energy consumption.

The purpose of the utility model can be realized by the following technical proposal: a push rod type sintering furnace comprises a preheating section, a sintering section and a cooling section which are sequentially communicated, wherein the preheating section and the sintering section are distributed along the left-right direction, the cooling section comprises a cooling chamber, a fan and a heat exchanger, the cooling chamber comprises a discharge port and a feed port used for being communicated with the tail end of the sintering section, a chamber door I and a chamber door II are respectively installed at the feed port and the discharge port, and an outlet of the heat exchanger is communicated with an inlet of the fan; the sintering furnace also comprises a feeding mechanism for feeding the workpiece at the tail end of the sintering section into the cooling chamber through the feeding hole and a material pushing mechanism for sending the workpiece in the cooling chamber out of the cooling chamber through the discharging hole.

Be in sintering section front side or rear side through the design cooling chamber, and the distribution direction of cooling chamber and sintering section is mutually perpendicular with the distribution direction around knot section and preheating section, simultaneously, make the feed inlet be in between sintering section and the cooling chamber again, and the air conditioning that gets into the cooling chamber is carried along vertical direction, blow to the sintering section with the air conditioning of effectively avoiding in the cooling chamber, with the heating volume that reduces sintering section department, thereby reduce the energy consumption of sintering section, practice thrift manufacturing cost.

In foretell push-down sintering furnace, the cooling chamber in the level be fixed with the perforated plate, and it has the through-hole that runs through the setting along vertical direction to gather on the perforated plate, this perforated plate separates into epicoele and cavity down with the inner chamber of cooling chamber, air intake and air outlet communicate with epicoele and cavity down respectively, and epicoele and cavity down pass through foretell through-hole intercommunication. Under the action of the porous plate, the cold air flowing from the air inlet is scattered, so that the cold air is uniformly distributed to all corners of the lower cavity, and the cooling quality is improved.

In foretell push-down sintering furnace, feeding mechanism include the push rod and all set up conveying chain subassembly and the drive assembly outside the sintering section, and drive assembly is used for driving conveying chain subassembly operation, and the lower extreme of push rod links to each other with conveying chain subassembly, and the upper end of push rod is in the end of sintering section, and under conveying chain subassembly's drive, the push rod can be followed sintering section and cooling chamber's distribution direction and reciprocated the translation. When the cooling device is used, the push rod pushes the workpiece to pass through the feeding hole and enter the cooling chamber, and the cooling device has the advantage of good working stability.

In the push rod type sintering furnace, the conveying chain component comprises a rack, chains and rollers rotatably arranged on the rack, at least two rollers are distributed along the distribution direction of the sintering section and the cooling chamber, the chains are wound on the rollers, the lower end of the push rod is fixedly connected with the chains, and the driving component drives one of the rollers to rotate.

In the push rod type sintering furnace, the driving assembly comprises a motor and a transmission mechanism, and the motor drives the roller to rotate through the transmission mechanism.

In the push rod type sintering furnace, the transmission mechanism comprises a driven wheel fixedly connected with the roller and a driving wheel fixedly connected with the motor spindle, and the driven wheel is connected with the driving wheel through a synchronous belt.

As another scheme, in the push rod type sintering furnace, the transmission mechanism comprises a pinion fixedly connected with the roller and a main gear fixedly connected with a main shaft of the motor, and the main gear is meshed with the pinion.

In foretell push-down sintering furnace, pushing equipment including locate the driving piece outside the cooling chamber and all locate push pedal and the support in the cooling chamber, support one end links firmly with the push pedal, the support other end stretches out the cooling chamber and links to each other with the driving piece.

In the push rod type sintering furnace, the driving part is an oil cylinder or an air cylinder, and a piston rod of the driving part is fixedly connected with the support.

Compared with the prior art, the push rod type sintering furnace has the following advantages:

1. be in sintering section front side or rear side through the design cooling chamber, and the distribution direction of cooling chamber and sintering section is mutually perpendicular with the distribution direction around knot section and preheating section, simultaneously, make the feed inlet be in between sintering section and the cooling chamber again, and the air conditioning that gets into the cooling chamber is carried along vertical direction, blow to the sintering section with the air conditioning of effectively avoiding in the cooling chamber, with the heating volume that reduces sintering section department, thereby reduce the energy consumption of sintering section, practice thrift manufacturing cost.

2. Because the cooling chamber is independent and closed, the cooling speed is completely controllable, and cold air made by the fan is only blown to the workpiece in the cooling chamber, so that different cooling time and fan frequency can be found out for different products to accurately control the cooling speed, and the cooling device has the advantage of good practicability.

3. Because the cooling speed can be controlled, the functions of high-temperature sintering and sinter hardening can be realized, the hardness of an iron-based powder metallurgy product of sinter hardening powder can reach 40HRC, the subsequent heat treatment after sintering is replaced, the dual functions of high-temperature sintering and sinter hardening are met, and the competitive advantage of the product is improved.

Drawings

FIG. 1 is a schematic top view of the pusher furnace.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is an enlarged schematic view of B in fig. 2.

Fig. 4 is a schematic sectional view at a-a in fig. 2.

In the figure, 1, preheating section; 2. a sintering section; 3. a cooling chamber; 3a, an air inlet; 3b, an air outlet; 4. a fan; 5. a heat exchanger; 6. a first chamber door; 7. a second chamber door; 8. a first pipe fitting; 9. a second pipe fitting; 10. a perforated plate; 11. a workpiece; 12. a push rod; 13. a frame; 14. a chain; 15. a roller; 16. a motor; 17. a driving wheel; 18. a driven wheel; 19. a synchronous belt; 20. a drive member; 21. pushing the plate; 22. and (4) a bracket.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, the push rod type sintering furnace includes a preheating section 1, a sintering section 2 and a cooling section which are sequentially communicated, wherein the preheating section 1 and the sintering section 2 are distributed along the left-right direction, that is, the preheating section 1 is located at the left side of the sintering section 2.

Specifically, as shown in fig. 1 to 3, the cooling section includes a cooling chamber 3, a blower 4 and a heat exchanger 5, wherein the cooling chamber 3 includes a discharge port and a feed port for communicating with the end of the sintering section 2, and a first door 6 and a second door 7 are respectively installed at the feed port and the discharge port. In actual use, the first door 6 and the second door 7 are controlled by two air cylinders (not shown) respectively, so that the first door 6 and the second door 7 can be opened or closed automatically. The technical solution of opening or closing the cylinder control chamber door is conventional and will not be described in detail here.

As shown in fig. 2 to 4, the outlet of the heat exchanger 5 communicates with the inlet of the blower 4, the cooling chamber 3 is disposed at the front or rear side of the sintering section 2, and the feed port is between the sintering section 2 and the cooling chamber 3. In the actual product, the cooling chamber 3 is arranged in front of the sintering section 2. The top and the bottom of the cooling chamber 3 are respectively provided with an air inlet 3a and an air outlet 3b, the air inlet 3a is communicated with an outlet of the fan 4 through a first pipe fitting 8, and the air outlet 3b is communicated with an inlet of the heat exchanger 5 through a second pipe fitting 9. Further, a perforated plate 10 is horizontally fixed in the cooling chamber 3, and through holes penetrating in the vertical direction are densely distributed on the perforated plate 10. The perforated plate 10 divides the inner cavity of the cooling chamber 3 into an upper cavity and a lower cavity, the air inlet 3a and the air outlet 3b are respectively communicated with the upper cavity and the lower cavity, and the upper cavity and the lower cavity are communicated through the through holes. The perforated plate 10 is used to scatter the cold air flowing from the air inlet 3a, so that the cold air is uniformly distributed to the corners of the lower cavity.

The sintering furnace also comprises a feeding mechanism which sends the workpiece 11 at the tail end of the sintering section 2 into the cooling chamber 3 through a feeding hole and a material pushing mechanism which sends the workpiece 11 in the cooling chamber 3 out of the cooling chamber 3 through a discharging hole.

Specifically, as shown in fig. 4, the feeding mechanism includes a push rod 12, and a conveying chain assembly and a driving assembly, which are both disposed outside the sintering section 2, and the driving assembly is used for driving the conveying chain assembly to operate. Wherein, the lower end of the push rod 12 is connected with the conveying chain component, the upper end of the push rod 12 is positioned in the tail end of the sintering section 2, and the push rod 12 can move in a reciprocating way along the distribution direction of the sintering section 2 and the cooling chamber 3 under the driving of the conveying chain component. In this embodiment, the conveying chain assembly includes a frame 13, a chain 14 and rollers 15 rotatably disposed on the frame 13, at least two rollers 15 are disposed along the distribution direction of the sintering section 2 and the cooling chamber 3, the chain 14 is wound around the rollers 15, the lower end of the push rod 12 is fixedly connected to the chain 14, and the driving assembly drives one of the rollers 15 to rotate. Preferably, the number of rolls 15 is 2. The driving assembly comprises a motor 16 and a transmission mechanism, the motor 16 drives the roller 15 to rotate through the transmission mechanism, the transmission mechanism comprises a driven wheel 18 fixedly connected with the roller 15 and a driving wheel 17 fixedly connected with a main shaft of the motor 16, and the driven wheel 18 and the driving wheel 17 are connected through a synchronous belt 19.

As shown in fig. 2 and fig. 3, the pushing mechanism includes a driving member 20 disposed outside the cooling chamber 3, and a push plate 21 and a support 22 both disposed in the cooling chamber 3, wherein one end of the support 22 is fixedly connected to the push plate 21, and the other end of the support 22 extends out of the cooling chamber 3 and is connected to the driving member 20. The driving member 20 is an oil cylinder or an air cylinder, and a piston rod of the driving member 20 is fixedly connected with the bracket 22. In this embodiment, the driving member 20 is preferably a cylinder.

The working process of the push rod type sintering furnace is as follows: the motor 16 drives the chain 14 to rotate so as to drive the push rod 12 to move towards the feeding hole (at the moment, the chamber door I6 is in an open state), so that the workpiece 11 at the tail end of the sintering section 2 is pushed to enter the cooling chamber 3 through the feeding hole; then the first door 6 of the chamber is closed, the fan 4 is rapidly started and reaches the frequency set by the program, hot air in the cooling chamber 3 is discharged from the air outlet 3b, and after being cooled by the heat exchanger, the fan 4 discharges cold air from the air inlet 3a into the cooling chamber 3 again to cool the product, and the continuous circulation is carried out; after the workpiece 11 is cooled to reach the room temperature at the required cooling speed, the fan 4 stops rotating, the second door 7 is opened, and the driving piece 20 pushes the workpiece 11 out of the cooling chamber 3 from the discharge port.

Example two

The second embodiment is basically the same as the first embodiment in structure and principle, and the difference lies in: the transmission mechanism comprises a pinion fixedly connected with the roller 15 and a main gear fixedly connected with a main shaft of a motor 16, and the main gear is meshed with the pinion.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A push rod type sintering furnace comprises a preheating section (1), a sintering section (2) and a cooling section which are sequentially communicated, wherein the preheating section (1) and the sintering section (2) are distributed along the left and right direction, the cooling section comprises a cooling chamber (3), a fan (4) and a heat exchanger (5), the cooling chamber (3) comprises a discharge port and a feed inlet which is communicated with the tail end of the sintering section (2), a chamber door I (6) and a chamber door II (7) are respectively arranged at the feed inlet and the discharge port, the outlet of the heat exchanger (5) is communicated with the inlet of the fan (4), the push rod type sintering furnace is characterized in that the cooling chamber (3) is arranged on the front side or the rear side of the sintering section (2), the feed inlet is arranged between the sintering section (2) and the cooling chamber (3), the top and the bottom of the cooling chamber (3) are respectively provided with an air inlet (3a) and an air outlet (3b), the air inlet (3a) is communicated with the outlet of the, the air outlet (3b) is communicated with an inlet of the heat exchanger (5) through a second pipe fitting (9); the sintering furnace also comprises a feeding mechanism for feeding the workpiece (11) at the tail end of the sintering section (2) into the cooling chamber (3) through a feeding hole and a material pushing mechanism for feeding the workpiece (11) in the cooling chamber (3) out of the cooling chamber (3) through a discharging hole.

2. The pusher-type sintering furnace according to claim 1, wherein a porous plate (10) is horizontally fixed in the cooling chamber (3), through holes penetrating through the porous plate (10) in the vertical direction are densely distributed on the porous plate (10), the porous plate (10) divides the inner cavity of the cooling chamber (3) into an upper cavity and a lower cavity, the air inlet (3a) and the air outlet (3b) are respectively communicated with the upper cavity and the lower cavity, and the upper cavity and the lower cavity are communicated through the through holes.

3. The pusher-type sintering furnace according to claim 1 or 2, characterized in that the feeding mechanism comprises a pusher (12) and a conveyor chain assembly and a driving assembly which are arranged outside the sintering section (2), the driving assembly is used for driving the conveyor chain assembly to operate, the lower end of the pusher (12) is connected with the conveyor chain assembly, the upper end of the pusher (12) is arranged in the tail end of the sintering section (2), and the pusher (12) can be driven by the conveyor chain assembly to perform reciprocating translation along the distribution direction of the sintering section (2) and the cooling chamber (3).

4. The pusher furnace according to claim 3, characterized in that the conveyor chain assembly comprises a frame (13), a chain (14) and rollers (15) rotatably mounted on the frame (13), the rollers (15) are at least two and distributed along the distribution direction of the sintering section (2) and the cooling chamber (3), the chain (14) is wound on the rollers (15), the lower end of the pusher (12) is fixedly connected with the chain (14), and the driving assembly drives one of the rollers (15) to rotate.

5. The pusher furnace according to claim 4, characterized in that the drive assembly comprises a motor (16) and a transmission mechanism, and the motor (16) drives the roller (15) to rotate through the transmission mechanism.

6. The pusher furnace according to claim 5, characterized in that the transmission mechanism comprises a driven wheel (18) fixed to the roller (15) and a driving wheel (17) fixed to the main shaft of the motor (16), and the driven wheel (18) and the driving wheel (17) are connected by a timing belt (19).

7. The pusher furnace according to claim 5, characterized in that the transmission comprises a pinion attached to the drum (15) and a main gear attached to the main shaft of the motor (16), and the main gear and the pinion are engaged.

8. The push rod type sintering furnace according to claim 1 or 2, characterized in that the pushing mechanism comprises a driving member (20) arranged outside the cooling chamber (3), and a push plate (21) and a bracket (22) both arranged in the cooling chamber (3), one end of the bracket (22) is fixedly connected with the push plate (21), and the other end of the bracket (22) extends out of the cooling chamber (3) and is connected with the driving member (20).

9. The pusher furnace according to claim 8, characterized in that the driving member (20) is a cylinder or a gas cylinder, and a piston rod of the driving member (20) is fixedly connected to the support (22).