CN214842422U

CN214842422U - Multi-stage cooling device for bell jar type sintering furnace

Info

Publication number: CN214842422U
Application number: CN202022831876.4U
Authority: CN
Inventors: 刘华佾; 熊拥军; 季助
Original assignee: Hunan Bokerui New Material Co ltd
Current assignee: Hunan Bokerui New Material Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-11-23
Anticipated expiration: 2030-11-30

Abstract

The utility model discloses a bell jar formula is multistage cooling device for sintering furnace, including upper cover, pass and press seat and barrel to install respectively in the upper and lower both sides of upper cover, but be provided with a plurality of atomizing nozzle that the hoop laid outside the sealed inner cover of sintering furnace in the barrel, atomizing nozzle is vertical direction injection, covers on and is provided with the exhaust hole. Compared with the water drop or water column, the utility model has the advantages that the surface area of the water drop or water column is greatly improved, the atomized water absorbs heat more sufficiently during cooling, the cooling is quicker, the cooling efficiency is improved, and the consumption of cooling water is reduced, thereby saving energy and protecting environment; through the three-level cooling mode of air cooling, atomizing water cooling and water spraying cooling, the cooling efficiency of the sealing inner cover is remarkably improved under the condition of avoiding deformation and cracking of the sealing inner cover.

Description

Multi-stage cooling device for bell jar type sintering furnace

Technical Field

The utility model relates to a powder metallurgy technical field especially relates to a bell jar formula is multistage cooling device for fritting furnace.

Background

The bell jar type pressure sintering furnace is a key device for producing powder metallurgy friction plates, and can apply pressure in the sintering process so as to quickly and effectively bond the friction plates with a base plate. The equipment consists of a heating body, a cooling cover, a sealing inner cover, a machine base, an electric system, a hydraulic system and the like. Placing and sintering a product to be sintered on a boat, sealing the boat in a sintering atmosphere by using a sealing inner cover, covering a heating body, applying sintering pressure by using a pressurizing oil cylinder, electrifying to heat for sintering, moving a developed heating body after sintering is finished, and replacing a cooling cover for water spraying and cooling until the temperature reaches the tapping temperature. It can be seen that the cooling process is an important part of the production, and the performance of the cooling cover directly affects the production efficiency.

The cooling cover of the existing scheme is composed of a pressure transmission seat, an upper cover and a barrel, an upper water inlet and an annular water spraying pipe are welded on the upper cover, a middle water inlet, a lower water inlet and the annular water spraying pipe are welded on the barrel, two rows of water spraying holes which face a sealing inner cover and are at a certain angle are uniformly distributed on the annular water spraying pipe, the cooling cover covers the sealing inner cover during cooling, after the water inlets are connected, cooling water is sprayed to the sealing inner cover through the water spraying holes, and the cooling is carried out on the sealing inner cover and products in the inner cover in a high-temperature state.

However, when the inner cover is cooled, the inner cover is in a high-temperature state close to 900 ℃, water spraying is directly carried out to cause the inner cover barrel to have a serious uneven temperature problem, the local temperature of the water spraying is sharply reduced, the place without water is continuously high in temperature, the inner cover is unevenly heated to cause the barrel to deform seriously, welding seams crack and other problems, the inner cover with high temperature is directly cooled by the water spraying, the material performance of the inner cover is easily changed, and the service life is influenced

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bell jar formula is multistage cooling device for sintering furnace to solve above-mentioned problem.

In order to achieve the purpose, the utility model discloses a bell jar formula is multistage cooling device for fritting furnace, including upper cover, pass and press seat and barrel to install respectively the upper and lower both sides of upper cover, but be provided with a plurality of atomizing nozzle that the hoop was laid outside the sealed inner cover of fritting furnace in the barrel, atomizing nozzle sprays for vertical direction, on cover and be provided with the exhaust hole.

Further, the atomizing nozzles are uniformly distributed along the inner circumference of the cylinder.

Furthermore, an annular water pipe capable of surrounding the sealing inner cover is arranged in the barrel, the annular water pipe is connected with the outside through a water inlet pipe, and the atomizing nozzle is arranged on the annular water pipe.

Further, annular water pipe is including setting up last annular water pipe at the barrel top and setting up the lower annular water pipe in the barrel bottom, the inlet tube includes last inlet tube and lower inlet tube, go up annular water pipe with go up water piping connection, lower annular water pipe with advance water piping connection down, the last atomizing nozzle that goes up on the annular water pipe sprays down, the atomizing nozzle of annular water pipe sprays up down.

Further, an air inlet pipe and an air outlet pipe which are communicated with each other are installed on the barrel, the air outlet pipe is arranged in the barrel, and the air inlet pipe is arranged outside the barrel.

Furthermore, the air outlet pipe of the air outlet pipe is obliquely and upwards arranged to form spiral upward air in the cylinder.

Further, the air-out pipe is fixedly connected with the outer wall of the barrel body and is provided with an annular air duct, the air-out pipe is communicated with one side of the annular air duct, and the air-in pipe is communicated with the other side of the annular air duct.

Furthermore, a middle annular water spraying pipe which can surround the outer part of the sealing inner cover of the sintering furnace is arranged on the lower side of the upper annular water pipe, and water spraying holes which spray water towards the sealing inner cover are arranged on the middle annular water spraying pipe.

Furthermore, the water spray holes are uniformly distributed in an upper row and a lower row in a staggered mode, and the axes of the upper row of the water spray holes and the lower row of the water spray holes are intersected so that the water column is sprayed to the inner sealing cover in a sector shape when water is sprayed.

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

compared with the water drop or water column, the utility model has the advantages that the surface area of the water drop or water column is greatly improved, the atomized water absorbs heat more sufficiently during cooling, the cooling is quicker, the cooling efficiency is improved, and the consumption of cooling water is reduced, thereby saving energy and protecting environment; meanwhile, the problem that the sealing inner cover deforms and cracks due to serious temperature difference caused by rapid reduction of local temperature of the sealing inner cover due to the fact that cooling water is directly sprayed to the high-temperature sealing inner cover at the temperature of nearly 900 ℃ in the initial cooling stage is solved, the service life of the sealing inner cover is prolonged, and the production cost is reduced; furthermore, the cooling efficiency of the sealing inner cover is obviously improved under the condition of avoiding deformation and cracking of the sealing inner cover through a three-level cooling mode of air cooling, atomized water cooling and water spraying cooling.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is a schematic axial view of a multistage cooling apparatus for a bell jar type sintering furnace according to a preferred embodiment of the present invention;

FIG. 2 is a schematic plan view of a multi-stage cooling apparatus for a bell jar type sintering furnace according to a preferred embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of fig. 2.

Illustration of the drawings:

1. a pressure transmission seat;

2. an upper cover; 21. an upper water inlet pipe; 22. an upper annular water pipe;

3. a barrel; 31. a middle water inlet pipe; 32. a middle annular spray pipe; 321. a water spray hole; 33. a lower water inlet pipe; 34. a lower annular water pipe; 35. an air inlet pipe; 36. an annular air duct; 37. an air outlet pipe;

4. an atomizing nozzle;

5. the inner cover is sealed.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1-3, the embodiment of the utility model discloses a multistage cooling device for bell jar formula sintering furnace, cooling device comprises pressure transmission seat 1, upper cover 2 and barrel 3, wherein, pressure transmission seat 1 installs the upside at upper cover 2, and barrel 3 installs the downside at upper cover 2. The upper cover 2 is provided with an upper water inlet pipe 21 and an upper annular water pipe 22, and the cylinder 3 is provided with a middle water inlet pipe 31, a middle annular water spray pipe 32, a lower water inlet pipe 33, a lower annular water pipe 34, an air inlet pipe 35, an annular air duct 36 and an air outlet pipe 37. Wherein, the upper annular water pipe 22, the lower annular water pipe 34 and the middle annular water spray pipe 32 are all annularly sleeved outside the sealing inner cover 5 of the sintering furnace, the upper annular water pipe 22 and the lower annular water pipe 34 are uniformly provided with a certain amount of atomizing nozzles 4 in a staggered manner, the atomizing nozzles 4 arranged on the upper annular water pipe 22 face downwards, and the atomizing nozzles 4 arranged on the lower annular water pipe 34 face upwards.

During cooling operation, high-pressure water is communicated to the upper water inlet pipe 21 and the lower water inlet pipe 33, a large amount of atomized water is sprayed out by the high-pressure water through the atomizing nozzle 4 to fill the cylinder 3 of the cooling cover, the products in the sealing inner cover 5 and the inner cover in a high-temperature state enable the atomized water to absorb heat and evaporate through heat radiation to take away the heat for cooling, and steam is dissipated into the atmosphere through the exhaust holes in the upper cover 2 after the atomized water absorbs heat and evaporates. Because the water under the same weight forms water mist after being atomized, the surface area of the water mist is greatly increased compared with water drops, and the heat absorption and temperature reduction effects of the atomized water are obviously improved compared with the water drops or a water column. Meanwhile, the generated atomized water is not directly sprayed onto the high-temperature sealing inner cover 5, so that the problem that the sealing inner cover 5 deforms and cracks due to serious temperature difference caused by rapid reduction of local temperature of the sealing inner cover 5 is avoided.

Further, in this embodiment, cooling device has the play tuber pipe 37 of a certain amount, goes out tuber pipe 37 upwards and is the even distribution of certain inclination in barrel 3, with fan and air-supply line 35 intercommunication, wind is discharged from each play tuber pipe 37 slant through annular wind channel 36, forms the ascending wind of spiral in barrel 3, except can carrying out the forced air cooling for high temperature seal inner cover 5, can also add the discharge of fast heating steam to improve cooling efficiency. Wherein, the annular air duct 36 is annularly sealed and enclosed in an annular groove structure on the outer wall of the barrel 3, each air outlet pipe 37 is communicated with the annular air duct 36, and one air inlet pipe 35 is shared, thereby simplifying the whole structure.

Further, in this embodiment, the water spraying holes 321 are formed on the middle ring-shaped water spraying pipe 32, the water spraying holes 321 are uniformly distributed in two rows, and the water spraying holes 321 in the two rows are staggered and form a certain angle, so that the water column is sprayed toward the inner sealing cover 5 in a sector shape when spraying water, thereby expanding the cooling area. When the temperature of the inner sealing cover 5 is reduced to a certain degree, the cooling water can be communicated with the middle water inlet pipe 31, and the cooling water is sprayed to the inner sealing cover 5 through the water spraying holes 321 on the middle annular water spraying pipe 32 to carry out water spraying cooling. And then realize the tertiary cooling of forced air cooling, atomizing water-cooling, trickle cooling to under the condition of avoiding sealed inner cover 5 to warp, fracture, showing the cooling efficiency who has improved sealed inner cover 5.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The multistage cooling device for the bell-jar type sintering furnace is characterized by comprising an upper cover (2), a pressure transmission seat (1) and a barrel (3), wherein the pressure transmission seat (1) and the barrel (3) are respectively installed on the upper side and the lower side of the upper cover (2), a plurality of atomizing nozzles (4) which can be annularly distributed outside a sealing inner cover (5) of the sintering furnace are arranged in the barrel (3), the atomizing nozzles (4) spray in the vertical direction, and exhaust holes are formed in the upper cover (2).

2. The multi-stage cooling device for the bell jar type sintering furnace according to claim 1, wherein the atomizing nozzles (4) are uniformly distributed along the inner circumference of the cylindrical body (3).

3. The multistage cooling device for the bell jar type sintering furnace according to claim 1, wherein an annular water pipe which can surround the sealing inner cover (5) is arranged in the cylinder body (3), the annular water pipe is connected with the outside through a water inlet pipe, and the atomizing nozzle (4) is arranged on the annular water pipe.

4. The multistage cooling device for the bell jar type sintering furnace according to claim 3, wherein the annular water pipe comprises an upper annular water pipe (22) arranged at the top of the cylinder body (3) and a lower annular water pipe (34) arranged at the bottom of the cylinder body (3), the water inlet pipes comprise an upper water inlet pipe (21) and a lower water inlet pipe (33), the upper annular water pipe (22) is connected with the upper water inlet pipe (21), the lower annular water pipe (34) is connected with the lower water inlet pipe (33), the atomizing nozzles (4) on the upper annular water pipe (22) spray downwards, and the atomizing nozzles (4) on the lower annular water pipe (34) spray upwards.

5. The multistage cooling device for the bell jar type sintering furnace according to any one of claims 1 to 4, wherein the barrel (3) is provided with an air inlet pipe (35) and an air outlet pipe (37) which are communicated with each other, the air outlet pipe (37) is arranged in the barrel (3), and the air inlet pipe (35) is arranged outside the barrel (3).

6. The multistage cooling device for a bell jar type sintering furnace according to claim 5, wherein the air outlet of the air outlet pipe (37) is arranged obliquely upward to form a spiral upward wind in the cylindrical body (3).

7. The multi-stage cooling device for the bell-type sintering furnace according to claim 5, further comprising an annular air duct (36) fixedly connected to the outer wall of the cylinder (3), wherein the air outlet pipes (37) are communicated with one side of the annular air duct (36), and the air inlet pipe (35) is communicated with the other side of the annular air duct (36).

8. The multistage cooling device for the bell jar type sintering furnace according to claim 4, wherein the lower side of the upper annular water pipe (22) is provided with a middle annular water spray pipe (32) which can surround the outside of the sealing inner cover (5) of the sintering furnace, and the middle annular water spray pipe (32) is provided with water spray holes (321) which spray water towards the sealing inner cover (5).

9. The multistage cooling device for the bell jar type sintering furnace according to claim 8, wherein the water spray holes (321) are evenly distributed in two rows, wherein the axes of the two rows of water spray holes (321) intersect to make the water column spray toward the inner sealing cover (5) in a fan shape when spraying water.