CN215217147U

CN215217147U - Mesh belt furnace

Info

Publication number: CN215217147U
Application number: CN202023205774.8U
Authority: CN
Inventors: 欧阳建; 黄映红; 杨克辉
Original assignee: Hunan Gold Furnace Science & Technology Co ltd
Current assignee: Hunan Gold Furnace Science & Technology Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-12-17
Anticipated expiration: 2030-12-25

Abstract

The utility model discloses a mesh belt furnace, including the furnace body that is equipped with tunnel type furnace, pass furnace's conveying mesh belt and be used for driving the drive arrangement of conveying mesh belt operation, be equipped with the rotation bearing roller that more than one held in the palm conveying mesh belt in the furnace. The mesh belt furnace has the advantages of long service life, low cost, high productivity and the like.

Description

Mesh belt furnace

Technical Field

The utility model relates to a heat treatment equipment technical field, concretely relates to mesh belt furnace.

Background

The mesh belt furnace is an industrial sintering furnace which utilizes mesh belt bearing materials to continuously convey in a tunnel type hearth for sintering, and is widely applied to the industries of powder metallurgy, heat treatment and the like. The mesh belt furnace is structurally divided into a rubber discharge section, a high-temperature section and a cooling section, and the mesh belt bearing materials are subjected to rubber discharge, high temperature and cooling in sequence to complete the sintering process.

The conveying mesh belt of the existing mesh belt furnace is driven by a set of driving device to run, the conveying mesh belt penetrates through one section of a tunnel type hearth (muffle pipe) without being supported, the length of the mesh belt furnace cannot be very long like a roller kiln due to the fact that the conveying mesh belt is not rigid, the conveying mesh belt is usually within the range of 20-25m, and because the conveying mesh belt is too long, a long section of the conveying mesh belt can be directly supported on the bottom surface of the hearth, friction resistance and abrasion of the conveying mesh belt and the bottom surface of the hearth are larger, requirements for the power and performance of the driving device are higher, and abrasion of the conveying mesh belt and the bottom surface of the hearth can be accelerated. For the above reasons, the length of the conventional belt furnace is generally limited to the above range, which hinders the productivity of the belt furnace from being improved.

Meanwhile, during the sintering process, organic components in the binder used for mixing the materials are decomposed and volatilized, and the volatile area in the furnace is usually in a glue discharging section and a part of high-temperature section, and the volatile matters need to be discharged in time or otherwise the sintering quality is influenced. The rubber discharging gas device is arranged at the front end of the rubber discharging section of the existing mesh belt furnace, the rubber gas is discharged in a pumping and discharging mode, the rubber gas generated by the rubber discharging section in the actual production process cannot be discharged in time, part of the rubber gas can stay in a hearth for a long time and even flows to a subsequent high-temperature section and a temperature reduction section, and the rubber gas and other volatile matters influence material sintering and even condense into wax-like substances to drip on products, so that the product quality is influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the deficiencies of the prior art and provide a mesh belt furnace with long service life, low cost and high productivity.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a mesh belt furnace comprises a furnace body provided with a tunnel type hearth, a conveying mesh belt penetrating through the hearth and a driving device used for driving the conveying mesh belt to run, wherein more than one rotating carrier roller for supporting the conveying mesh belt is arranged in the hearth.

As a further improvement of the above technical solution:

install the muffle pipe on the furnace body, the muffle pipe includes U type cover and bottom flat board, the opening of U type cover is down, the dull and stereotyped connection of bottom is at the opening part of U type cover and encloses with U type cover and synthesize furnace, it installs to rotate the bearing roller on the flat board of bottom.

More than one reinforcing part protruding downwards is formed on the bottom flat plate in a stamping or bending mode.

The rotating carrier roller comprises a roller shaft and a roller, the two ends of the roller shaft are respectively installed on the bottom surface of the hearth through supports, the roller is sleeved outside the roller shaft through a bearing, and more than two reinforcing parts are arranged between the supports at the two ends of the roller shaft at intervals.

The reinforcing part is V-shaped.

The utility model discloses a furnace, including furnace, fire box, air inlet, exhaust section, high temperature section, cooling section, the section of gluing has the binder removal section, high temperature section and the cooling section of cooling that connects gradually, the binder removal section is connected with binder removal gas device, the high temperature section is equipped with and is connected with air inlet unit, furnace still is equipped with and is located the section is pressed in the accuse between binder removal section and the high temperature section, the section is pressed in the accuse is equipped with the air inlet that is connected with air feeder.

And a plurality of rotating carrier rollers which are sequentially arranged at intervals are arranged only on the cooling and cooling section.

The gas supply device comprises a gas source and more than one gas inlet cavity arranged at the top of the hearth, the gas inlet cavities are communicated with the hearth through a plurality of communicating holes, and each gas inlet cavity is communicated with the gas source through a vent pipe.

The plurality of communicating holes are distributed on the top wall of the hearth in a matrix form.

The gas supplied by the gas supply device enables the flow rate of the gas entering the glue discharging section from the gas inlet to meet the following requirements: the air pressure P1 in the pressure control section is less than the air pressure P2 in the glue discharging section.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses a mesh belt furnace is provided with the rotation bearing roller that holds conveying mesh belt in furnace, the conveying mesh belt supporting moves on rotating the bearing roller, both are the less rolling friction form of frictional force, and conveying mesh belt and furnace bottom surface direct contact's length and area have been reduced, can reduce the frictional force of conveying mesh belt and furnace bottom surface by a wide margin, can reduce the performance requirement to drive arrangement on the one hand, can prolong the length of whole mesh belt furnace under the same drive arrangement, improve mesh belt furnace's productivity, on the other hand conveying mesh belt reduces with furnace bottom surface contact's length and area, frictional force also reduces, reducible wearing and tearing, prolong conveying mesh belt and furnace's life, and use cost is reduced.

Drawings

Fig. 1 is a schematic front view structure diagram of a mesh belt furnace.

Fig. 2 is a schematic structural diagram of a main view of the rotary carrier roller arranged in the cooling section.

Fig. 3 is a schematic sectional structural view of the rotary idler mounted on the bottom plate.

FIG. 4 is a schematic sectional structure view of the furnace body at the position of the air inlet cavity.

Fig. 5 is a schematic view of the communication holes distributed in a matrix form on the top wall of the furnace.

Illustration of the drawings:

1. a furnace body; 11. a hearth; 111. a glue discharging section; 112. a high temperature section; 113. cooling and cooling section; 114. a pressure control section; 1141. an air inlet; 2. a conveying mesh belt; 3. rotating the carrier roller; 31. a roll shaft; 32. a roller; 33. a support; 34. a bearing; 4. an air inlet cavity; 41. a communicating hole; 100. a muffle tube; 101. a U-shaped cover; 102. a bottom plate; 1021. a reinforcing portion; 200. a glue gas discharging device; 201. a first pressure detector; 202. a second pressure gauge; 203. and a third pressure detector.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments.

As shown in fig. 1 to fig. 3, the mesh belt furnace of the embodiment includes a furnace body 1 provided with a tunnel type furnace chamber 11, a conveying mesh belt 2 passing through the furnace chamber 11, and a driving device for driving the conveying mesh belt 2 to operate, the driving device adopts the prior art, and includes a motor and a mesh belt roller, the conveying mesh belt 2 is wound around the mesh belt roller, and more than one rotating carrier roller 3 for supporting the conveying mesh belt 2 is arranged in the furnace chamber 11. This mesh belt furnace is provided with the rotation bearing roller 3 that holds conveying mesh belt 2 in furnace 11, conveying mesh belt 2 supports and moves on rotation bearing roller 3, both are the less rolling friction form of frictional force, and reduced conveying mesh belt 2 and the length and the area of 11 bottom surface direct contacts of furnace, can reduce the frictional force of conveying

mesh belt

2 and 11 bottom surfaces of furnace by a wide margin, can reduce the performance requirement to drive arrangement on the one hand, can prolong the length of whole mesh belt furnace under the same drive arrangement, improve mesh belt furnace's productivity, on the other hand conveying mesh belt 2 and the length and the area of 11 bottom surface contacts of furnace reduce, frictional force also reduces, reducible wearing and tearing, the life of extension conveying mesh belt 2 and furnace 11, and the use cost is reduced.

In this embodiment, the muffle tube 100 is installed on the furnace body 1, the muffle tube 100 includes a U-shaped cover 101 and a bottom plate 102, an opening of the U-shaped cover 101 faces downward, the bottom plate 102 is connected to the opening of the U-shaped cover 101, the bottom plate 102 and the U-shaped cover 101 enclose a tunnel-type furnace 11, and the rotating carrier roller 3 is installed on the bottom plate 102. The hearth 11 in the form has the advantages of simple structure, low cost, easiness in manufacturing and assembling and convenience in maintenance.

In this embodiment, more than one reinforcing part 1021 is formed on the bottom plate 102 by stamping or bending, which can improve the rigidity of the muffle tube 100, increase the load bearing capacity for the load in the vertical direction, and ensure the stable operation of the mesh belt furnace. Preferably, the reinforcing part 1021 is V-shaped, which improves rigidity and load-bearing capacity.

In this embodiment, as shown in fig. 3, the rotating carrier roller 3 includes a roller shaft 31 and a roller 32, two ends of the roller shaft 31 are respectively installed on the bottom surface of the furnace 11 through a bracket 33, the roller 32 is rotatably sleeved outside the roller shaft 31 through a bearing 34, and the roller 32 can freely rotate around the axis of the roller shaft 31. More than two reinforcing parts 1021 arranged at intervals are arranged between the supports 33 at the two ends of the roller shaft 31, so that the bottom plate 102 has better stress performance and is not easily pressed and deformed by the rotating carrier roller 3.

In this embodiment, as shown in fig. 1, the furnace 11 has a glue discharging section 111, a high temperature section 112 and a cooling and cooling section 113 which are connected in sequence, the glue discharging section 111 is connected with a glue discharging device 200, the high temperature section 112 is provided with a gas inlet device, the furnace 11 is further provided with a pressure control section 114 located between the glue discharging section 111 and the high temperature section 112, and the pressure control section 114 is provided with a gas inlet 1141 connected with a gas supply device. Set up accuse pressure section 114 between binder removal section 111 and high temperature section 112, accuse pressure section 114 is equipped with the air inlet 1141 that is connected with air feeder, let in process gas to accuse pressure section 114 through air inlet 1141 through air feeder, process gas can flow to binder removal section 111 and high temperature section 112 at accuse pressure section 114 both ends, can force the binder removal section 111 to produce binder removal gas to the one end that binder removal section 111 kept away from high temperature section 112 flow, and then discharge through binder removal gas device 200, do benefit to binder removal gas quick, in time, thorough discharge, thereby improve material sintering quality. The mesh belt furnace also has the advantages of simple structure, easy implementation and low implementation cost.

In the present embodiment, a plurality of rotating idlers 3 are provided at intervals in sequence only in the cooling and cooling section 113. The temperature is lower in the cooling section 113, and does not have the volatile matter, will rotate bearing roller 3 and set up in cooling section 113, rotates bearing roller 3 and does not receive high temperature to influence, can guarantee job stabilization nature and reliability, also does not have the volatile matter cooling to condense on rotating bearing roller 3 simultaneously, can avoid causing the influence to material sintering quality.

In this embodiment, as shown in fig. 4 and 5, the air supply device includes an air source and more than one air inlet chamber 4 disposed at the top of the hearth 11, the air inlet chambers 4 are communicated with the hearth 11 through a plurality of communication holes 41, and each air inlet chamber 4 is communicated with the air source through a ventilation pipe (not shown in the figure). The gas provided by the gas source firstly enters the gas inlet cavity 4 and then enters the hearth 11 through the plurality of communication holes 41, so that the gas flow velocity can be reduced, the phenomenon that turbulent flow is generated in the hearth 11 due to the too high gas flow velocity to influence the movement track of the gas flow from the pressure control section 114 to the two ends is avoided, the gas uniformly enters the high temperature section 112, and the effects of balancing the atmosphere field and stabilizing the gas flow direction are achieved. The number and the position of the air inlet cavities 4 can be set according to actual needs.

In this embodiment, the plurality of communication holes 41 are distributed on the top wall of the furnace 11 in a matrix form, and the uniformity of the gas entering the high temperature section 112 is good, and the gas is easy to manufacture and set.

In this embodiment, the gas supplied by the gas supply device makes the flow rate of the gas entering the glue discharging section 111 from the gas inlet 1141 satisfy: the air pressure P1 in the pressure control section 114 is less than the air pressure P2 in the glue discharging section 111.

In this embodiment, the breather pipe passes cooling section 113, and cooling section 113 plays the preheating effect to the gas in the breather pipe, has not only realized waste heat utilization, can reduce the energy consumption, and gas reentrant furnace 11 after being preheated does benefit to the homogeneity that improves the inside temperature of furnace 11.

In this embodiment, the furnace body 1 is provided with a first pressure meter 201 for detecting the air pressure in the pressure control section 114 and a second pressure meter 202 for detecting the air pressure in the glue discharging section 111. The first pressure gauge 201 and the second pressure gauge 202 are used for obtaining the air pressure in the pressure control section 114 and the glue discharging section 111 conveniently, so that the flow of the process gas introduced into the pressure control section 114 by the gas supply device is controlled conveniently, and the process gas is ensured to flow to the glue discharging section 111 and the high temperature section 112 at two ends of the pressure control section 114.

In this embodiment, the gas supplied by the gas supply device makes the flow rate of the gas entering the glue discharging section 111 from the gas inlet 1141 satisfy: the air pressure P1 in the pressure control section 114 is less than the air pressure P2 in the glue discharging section 111, so that the process gas can be ensured to flow to the glue discharging section 111 and the high temperature section 112 at two ends of the pressure control section 114.

In this embodiment, the binder removal section 111 is connected with the accuse pressure device that admits air, and the gas flow that admits air accuse pressure device lets in to binder removal section 111 satisfies: the air pressure P1 in the glue discharging section 111 is greater than the air pressure outside the hearth 11, so that outside air is prevented from entering the hearth 11.

In this embodiment, the flow rate of the gas introduced into the high temperature section 112 by the gas inlet device satisfies: the air pressure P3 in the high temperature section 112 is greater than the air pressure outside the furnace 11, so as to prevent outside air from entering the furnace 11.

In this embodiment, the furnace body 1 is provided with a third pressure detector 203 for detecting the air pressure in the high temperature section 112, and the third pressure detector 203 is utilized to obtain the air pressure in the high temperature section 112, so as to conveniently control the flow rate of the air introduced into the high temperature section 112 by the air inlet device, thereby ensuring that the set air pressure is satisfied in the furnace 11.

In this embodiment, the driving device, the glue discharging device 200, and the air inlet device all adopt the prior art. Preferably, the drive means employs a combination of a motor and a belt roller. The glue gas discharging device 200 comprises an exhaust fan which is communicated with the hearth 11 through a pipeline. The air inlet device comprises an air inlet fan, and the air inlet fan is communicated with the hearth 11 through a pipeline.

The above description is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, the modifications and changes obtained without departing from the technical idea of the present invention shall be considered as the protection scope of the present invention.

Claims

1. The utility model provides a mesh belt furnace, includes furnace body (1) that is equipped with tunnel type furnace (11), passes conveying mesh belt (2) of furnace (11) and is used for driving conveying mesh belt (2) operation's drive arrangement which characterized in that: more than one rotating carrier roller (3) for supporting the conveying mesh belt (2) is arranged in the hearth (11); install muffle tube (100) on furnace body (1), muffle tube (100) are including U type cover (101) and bottom flat board (102), the opening of U type cover (101) is down, bottom flat board (102) are connected at the opening part of U type cover (101) and are enclosed with U type cover (101) and become furnace (11), it installs to rotate bearing roller (3) on the flat board (102) of bottom.

2. The belt furnace of claim 1, wherein: more than one reinforcing part (1021) protruding downwards is formed on the bottom flat plate (102) in a stamping or bending mode.

3. The mesh belt furnace of claim 2, wherein: rotate bearing roller (3) and include roller (31) and roller (32), install on the bottom surface of furnace (11) through support (33) respectively at the both ends of roller (31), roller (32) pass through the rotatable cover of bearing (34) and establish roller (31) outside, have more than two interval arrangements between support (33) at roller (31) both ends reinforcement (1021).

4. The mesh belt furnace of claim 2, wherein: the reinforcing part (1021) is V-shaped.

5. The mesh belt furnace according to any one of claims 1 to 4, characterized in that: furnace (11) have binder removal section (111), high temperature section (112) and cooling section (113) that connect gradually, binder removal section (111) is connected with binder removal gas device (200), high temperature section (112) are equipped with and are connected with air inlet unit, furnace (11) still are equipped with and are located section (114) are pressed in the accuse between binder removal section (111) and high temperature section (112), section (114) are pressed in the accuse is equipped with air inlet (1141) that is connected with air feeder.

6. The mesh belt furnace of claim 5, wherein: a plurality of rotating carrier rollers (3) which are sequentially arranged at intervals are arranged only on the cooling and cooling section (113).

7. The mesh belt furnace of claim 6, wherein: the gas supply device comprises a gas source and more than one gas inlet cavity (4) arranged at the top of the hearth (11), the gas inlet cavities (4) are communicated with the hearth (11) through a plurality of communicating holes (41), and each gas inlet cavity (4) is communicated with the gas source through a vent pipe.

8. The mesh belt furnace of claim 7, wherein: the communication holes (41) are distributed on the top wall of the hearth (11) in a matrix form.

9. The mesh belt furnace of claim 6, wherein: the gas supply device supplies gas so that the flow rate of the gas entering the glue discharging section (111) from the gas inlet (1141) meets the following requirements: the air pressure P1 in the pressure control section (114) is less than the air pressure P2 in the glue discharging section (111).