CN211005575U

CN211005575U - Furnace charging structure for steel ball carbonitriding

Info

Publication number: CN211005575U
Application number: CN201922097699.9U
Authority: CN
Inventors: 王乾平
Original assignee: Chunzhongdao Machinery Chongqing Co ltd
Current assignee: Chunzhongdao Machinery Chongqing Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-07-14
Anticipated expiration: 2029-11-28

Abstract

The utility model relates to a thermal treatment equipment technical field specifically discloses steel ball carbonitriding is with dress stove structure, including a plurality of dress stove containers that overlap from top to bottom, the top of dress stove container is uncovered setting, the bottom of dress stove container is fixed with the bottom plate, the water conservancy diversion hole has been seted up on the bottom plate, water conservancy diversion hole department is fixed with the draft tube of vertical setting, has all seted up the air current hole on the lateral wall of dress stove container, bottom plate and the draft tube lateral wall, the top of draft tube is fixed with the stop collar, and the top of stop collar is located the outside of dress stove container, the stop collar can get into in the water conservancy diversion hole. By adopting the technical scheme in the patent, the high-temperature carbon nitrogen atmosphere in the heat treatment furnace can be diffused into the charging container from the airflow hole on the charging container and can also enter the charging container from the guide cylinder, so that the steel ball in the charging container at the middle part is well treated, and the steel ball in the middle part of a single charging container can also be well co-infiltrated.

Description

Furnace charging structure for steel ball carbonitriding

Technical Field

The utility model relates to a heat treatment equipment technical field, in particular to steel ball carbonitriding is with dress stove structure.

Background

The chemical surface heat treatment process for simultaneously permeating carbon and nitrogen into the surface of a steel part is called carbonitriding, and a steel ball as a part of a bearing requires that the surface of the steel ball simultaneously has the performances of high hardness, high wear resistance, high fatigue strength and the like, and the carbonitriding heat treatment process can meet the requirements.

The diameter of the steel ball for the bearing is small, and is usually within the range of 5-20mm, so the steel ball needs to be mounted in a material frame, and then the material frame is put into a heat treatment furnace for carbonitriding treatment, in order to improve the production efficiency, a plurality of material frames are put into the heat treatment furnace in the same batch, but after the material frames are overlapped, the carbonitriding atmosphere is difficult to diffuse into the material frame positioned in the middle, so that the performance difference of the steel ball in the same batch is large.

SUMMERY OF THE UTILITY MODEL

The utility model provides a steel ball carbonitriding is with dress stove structure to after solving among the prior art a plurality of material frames and overlapping, the problem in the material frame at carbon nitrogen atmosphere is difficult to diffuse to the middle part.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the charging structure for steel ball carbonitriding comprises a plurality of charging containers which are overlapped up and down, the top of each charging container is arranged in an open mode, a bottom plate is fixed to the bottom of each charging container, guide holes are formed in the bottom plate, guide cylinders which are vertically arranged are fixed to the guide holes, airflow holes are formed in the side walls of the charging containers, the bottom plate and the side walls of the guide cylinders, limiting sleeves are fixed to the tops of the guide cylinders, the tops of the limiting sleeves are located outside the charging containers, and the limiting sleeves can enter the guide holes.

The technical principle and the effect of the technical scheme are as follows:

1. after the charging container is overlapped, the adjacent guide cylinders are communicated, and high-temperature carbon nitrogen atmosphere in the heat treatment furnace can be diffused into the charging container from an airflow hole in the charging container and also can enter the charging container from the guide cylinders, so that steel balls in the charging container at the middle part are well treated, and meanwhile, steel balls in the middle part of a single charging container can also be well co-infiltrated.

2. When the dress stove container overlaps in this scheme, the stop collar that is located the below gets into the air current downthehole, sets up like this and can tentatively decide to the dress stove container of hoist and mount, and on the other hand is then when the dress stove container hoist of overlapping to heat treatment furnace, can prevent to produce between the dress stove container and slide.

Further, the charging container is cylindrical.

Has the advantages that: the cylindrical charging container can reduce edges and corners in the container, so that scratches generated in the process of taking and placing the steel balls are avoided.

Furthermore, the diversion hole is positioned at the center of the bottom plate, and the diversion cylinder and the diversion hole are coaxially arranged.

Has the advantages that: the guide hole and the guide cylinder are arranged at the center of the bottom, so that the space formed between the guide cylinder and the charging container is regular in shape, and the condition that part of the steel ball is few and part of the steel ball is many after being placed in the furnace can be avoided.

Furthermore, the diversion hole is polygonal, and the stop collar is in clearance fit with the diversion hole.

Has the advantages that: through the clearance fit of stop collar and water conservancy diversion hole, on the one hand plays preliminary positioning action to adjacent two charge containers, and on the other hand places the in-process of hoist and mount to heat treatment furnace, produces relative displacement between the adjacent charge container.

Furthermore, the outer diameter of the guide cylinder is 1/5-1/4 of the inner diameter of the charging container.

Has the advantages that: the outer diameter of the guide cylinder is too small, so that the guide effect on the carbon nitrogen atmosphere in the charging container is difficult to achieve, and the outer diameter of the guide cylinder is too large, so that the space for charging the steel balls is reduced, and the quantity of the steel balls which can be subjected to co-cementation in each batch is greatly reduced.

Furthermore, a plurality of concave pits positioned between adjacent airflow holes are arranged on the bottom plate.

Has the advantages that: therefore, when the steel ball enters the furnace charging container, the steel ball rolls into the concave pit, so that the steel ball can be prevented from being directly blocked on the airflow hole of the bottom plate, and the fluidity of the high-temperature carbon-nitrogen atmosphere is improved.

Further, a hoisting mechanism is arranged on the outer wall of the charging container.

Has the advantages that: the hoisting mechanism is arranged to facilitate hoisting of the charging container by an operator through equipment such as a crane.

Furthermore, the hoisting mechanism comprises two connecting columns and two connecting plates, the connecting columns are horizontally and symmetrically fixed on two sides of the charging container, and positioning holes for the connecting columns to enter are arranged on the connecting plates at intervals.

Has the advantages that: after the charging containers are stacked, the connecting columns on the same side are located on a vertical line, then the charging containers are loaded into the positioning holes through the connecting columns, the connecting plates are installed on the connecting columns, and the stacked charging containers are conveyed through the hoisting connecting plates.

Furthermore, one end of the connecting column, which is far away from the charging container, is fixed with a limiting head, and the diameter of the limiting head is larger than that of the connecting column.

Has the advantages that: the limiting head is arranged to prevent the connecting column from sliding out of the locating hole in the hoisting process.

Furthermore, the upper part of the connecting plate is provided with a hoisting hole.

Has the advantages that: the arrangement of the hoisting holes is convenient for equipment such as a crane to hoist the charging container.

Drawings

FIG. 1 is a schematic diagram of two charging containers stacked in embodiment 1 of the present invention;

FIG. 2 is a sectional view of a single charging container in example 1 of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a sectional view of a single charging container in embodiment 2 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the furnace charging device comprises a furnace charging container 1, a bottom plate 2, a diversion hole 3, a diversion cylinder 4, an airflow hole 5, a limiting sleeve 6, a connecting column 7, a connecting plate 8, a limiting head 9, a positioning hole 10, a hoisting hole 11 and a pit 12.

Example 1 is substantially as shown in figures 1 and 2 of the accompanying drawings:

steel ball carbonitriding is with dress stove structure, including a plurality of charge container 1 that overlap from top to bottom, each charge container 1's structure is the same, wherein single charge container 1 is the tube-shape, the top of charge container 1 is uncovered promptly, and transversal personally submits circularly, bottom at charge container 1 is fixed with bottom plate 2, water conservancy diversion hole 3 has been seted up in bottom plate 2's center department, 3 vertical draft tube 4 that are located charge container 1 of being fixed with in water conservancy diversion hole department, draft tube 4 and the coaxial setting of water conservancy diversion hole 3, the external diameter of draft tube 4 is 1/5 ~ 1/4 of charge container 1 internal diameter.

All seted up air current hole 5 on the lateral wall of charge container 1, bottom plate 2 and draft tube 4 lateral wall, wherein the aperture of air current hole 5 is not more than 5mm (the diameter of minimum steel ball), is fixed with the stop collar 6 of T type at the top of draft tube 4, and the middle part of stop collar 6 link up, and the top of stop collar 6 is located charge container 1's outside, and stop collar 6 can enter into in the draft tube 3.

As shown in fig. 3, the diversion hole 3 is octagonal, the outer wall of the vertical section of the limiting sleeve 6 is also octagonal, and the vertical section of the limiting sleeve 6 is in clearance fit with the diversion hole 3; the hoisting mechanism is arranged on the outer wall of the charging container 1 and comprises two connecting columns 7 and two connecting plates 8, the connecting columns 7 are horizontally arranged and symmetrically fixed on two sides of the charging container 1, a limiting head 9 is fixed at one end, far away from the charging container 1, of each connecting column 7, and the diameter of each limiting head 9 is larger than that of each connecting column 7.

The connecting plate 8 is in a long strip shape, positioning holes 10 for the connecting columns 7 to enter are arranged on the connecting plate at intervals, the distance between every two adjacent positioning holes 10 is the distance between every two connecting columns 7 on one side of the adjacent charging containers 1 after the charging containers 1 are overlapped, and hoisting holes 11 are formed in the upper portion of the connecting plate 8.

During specific implementation, place the steel ball in charge container 1, later overlap charge container 1, overlap 7 layers usually, overlap the in-process, stop collar 6 and water conservancy diversion hole 3's clearance fit play preliminary positioning action to two adjacent charge containers 1, overlap after accomplishing, adorn connecting plate 8 on spliced pole 7, later through hoisting equipment with the charge container 1 of overlapping put into heat treatment furnace can.

Example 2 is substantially as shown in figure 4:

the difference from example 1 is that: be equipped with a plurality of pits 12 that are located between adjacent airflow hole 5 on bottom plate 2, the bottom surface of pit 12 is the arcwall face, and wherein the radius of arcwall face is not less than 5mm, and like this when the steel ball gets into the container 1 of charging, the steel ball rolls to in the pit 12, just so can prevent that the steel ball from directly blockking up on the airflow hole 5 of bottom plate 2, consequently improves the mobility of carbon nitrogen high temperature atmosphere.

Example 3:

the difference from example 1 is that: the guide holes 3 are quadrilateral, the outer wall of the vertical section of the limiting sleeve 6 is quadrilateral, four connecting columns 7 are arranged on a single charging container 1, the four connecting columns 7 are circumferentially and uniformly distributed on the outer wall of the charging container 1, and after a plurality of charging containers 1 are overlapped together, the connecting columns 7 on adjacent charging containers 1 can be always connected into a straight line, so that the charging containers 1 do not need to be moved (or hoisted) again, and the connecting columns 7 on the adjacent charging containers 1 are ensured to be on a vertical line.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Steel ball carbonitriding is with dress stove structure, including a plurality of charge stove containers that overlap from top to bottom, its characterized in that: the top of the charging container is open, a bottom plate is fixed at the bottom of the charging container, a guide hole is formed in the bottom plate, a guide cylinder which is vertically arranged is fixed at the guide hole, airflow holes are formed in the side wall of the charging container, the bottom plate and the side wall of the guide cylinder, a limiting sleeve is fixed at the top of the guide cylinder, the top of the limiting sleeve is located outside the charging container, and the limiting sleeve can enter the guide hole.

2. The charging structure for steel ball carbonitriding according to claim 1, characterized in that: the charging container is cylindrical.

3. The charging structure for steel ball carbonitriding according to claim 2, characterized in that: the guide hole is positioned in the center of the bottom plate, and the guide cylinder and the guide hole are coaxially arranged.

4. The charging structure for steel ball carbonitriding according to claim 1, characterized in that: the flow guide hole is polygonal, and the limiting sleeve is in clearance fit with the flow guide hole.

5. The charging structure for steel ball carbonitriding according to claim 1, characterized in that: the outer diameter of the guide cylinder is 1/5-1/4 of the inner diameter of the charging container.

6. The charging structure for steel ball carbonitriding according to claim 1, characterized in that: the bottom plate is provided with a plurality of pits positioned between adjacent airflow holes.

7. The charging structure for steel ball carbonitriding according to claim 6, characterized in that: and a hoisting mechanism is arranged on the outer wall of the charging container.

8. The charging structure for steel ball carbonitriding according to claim 7, characterized in that: the hoisting mechanism comprises two connecting columns and two connecting plates, the connecting columns are horizontally and symmetrically fixed on two sides of the charging container, and positioning holes for the connecting columns to enter are arranged on the connecting plates at intervals.

9. The charging structure for steel ball carbonitriding according to claim 8, characterized in that: and one end of the connecting column, which is far away from the charging container, is fixed with a limiting head, and the diameter of the limiting head is larger than that of the connecting column.

10. The charging structure for steel ball carbonitriding according to claim 9, characterized in that: and the upper part of the connecting plate is provided with a hoisting hole.