CN219731035U

CN219731035U - Ultra-large nitriding furnace bearing base type muffle

Info

Publication number: CN219731035U
Application number: CN202320577035.6U
Authority: CN
Inventors: 瞿旭峰; 吴靖
Original assignee: Tlon Technical Furnaces Wuxi Co ltd
Current assignee: Tlon Technical Furnaces Wuxi Co ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-09-22
Anticipated expiration: 2033-03-22

Abstract

The utility model relates to a bearing base type muffle of an oversized nitriding furnace, which sequentially comprises a furnace shell, an outer cylinder and an inner cylinder from outside to inside, wherein the bottom of the outer cylinder is connected with the muffle, a furnace cover is arranged above the furnace shell, the furnace cover is buckled at the top of the outer cylinder, a sealing component is arranged between the furnace shell and the furnace cover, the sealing component is arranged outside the outer cylinder, the sealing component comprises a first sealing element and a second sealing element, the first sealing element is arranged between the furnace cover and the furnace shell, the top end of the second sealing element is inserted between the first sealing element and the outer wall of the outer cylinder, the bottom end of the second sealing element is fixedly connected with the outer wall of the outer cylinder, and when the furnace body is in bulge deformation, the outer cylinder pushes the second sealing element to extrude the first sealing element onto the furnace cover. When the temperature in the furnace body rises, the extrusion force of the sealing component on the furnace cover and the furnace shell is larger, so that the sealing is tighter, the sealing effect is improved, and the air leakage problem caused by deformation of the furnace body and the furnace cover at the excessively high air temperature is avoided.

Description

Ultra-large nitriding furnace bearing base type muffle

Technical Field

The utility model relates to the field of heating equipment, in particular to a bearing base type muffle of an ultra-large nitriding furnace.

Background

The existing muffle is easy to deform due to the separation of the furnace mouth and the furnace cover, the furnace body is inflated at high temperature and high pressure, the jacket for filling the protective gas is arranged in the muffle, the middle part of the furnace body is outwards spread, the furnace mouth is deformed inwards, the furnace mouth and the furnace cover cannot be attached, a plurality of irregular air holes are formed between the furnace mouth and the furnace cover, air leakage is caused, and when external air permeates into the muffle through the air holes, the protective atmosphere in the furnace body is influenced, and the normal operation of production is seriously influenced.

Disclosure of Invention

In order to prevent the problem that the normal operation of equipment is affected due to air leakage caused by expansion of a furnace body in the muffle furnace heating process, the utility model provides a bearing base type muffle device of an oversized nitriding furnace, which adopts the following technical scheme:

the ultra-large nitriding furnace bearing base type muffle comprises a furnace shell, an outer cylinder and an inner cylinder from outside to inside in sequence, wherein the muffle is connected to the bottom of the outer cylinder, a furnace cover is arranged above the furnace shell and buckled on the top of the outer cylinder, a sealing component is arranged between the furnace shell and the furnace cover and arranged on the outer side of the outer cylinder, the sealing component comprises a first sealing piece and a second sealing piece, the first sealing piece is arranged between the furnace cover and the furnace shell, the top end of the second sealing piece is inserted between the first sealing piece and the outer wall of the outer cylinder, the bottom end of the second sealing piece is fixedly connected with the outer wall of the outer cylinder, and when the furnace body is in bulge deformation, the outer cylinder pushes the second sealing piece to extrude the first sealing piece onto the furnace cover.

Through adopting above-mentioned technical scheme, seal assembly is as atmospheric pressure sealing device in the furnace body, can prevent that the gas leakage condition that furnace body and bell warp and lead to from appearing under the too high temperature, seal assembly is located between furnace body and the bell, can provide better sealed effect, has guaranteed that equipment is at the steady operation under the high temperature.

The wall of the outer cylinder is wavy.

Through adopting above-mentioned technical scheme, urceolus wall design into wave section of thick bamboo wall, when intracavity temperature rise, furnace body material can take place to bulge, but wave section of thick bamboo wall has certain elasticity, can play the cushioning effect, slows down the oven degree of deformation that temperature change leads to a certain extent to prevent the furnace body damage.

The bottom edge of the furnace cover is provided with a limit groove, the inner side of the top edge of the furnace shell is provided with a supporting groove, the first sealing element is arranged between the limit groove and the supporting groove, the top of the outer cylinder is provided with a circle of reinforced edge, the top end of the second sealing element is positioned between the bottom of the first sealing element and the reinforced edge, and the bottom end of the second sealing element is fixedly connected with the outer cylinder.

Through adopting above-mentioned technical scheme, in the heating process, the design of spacing groove can be fixed annular sealing gasket two, and when the temperature risees in the stove, sealing component is bigger to the extrusion force of bell and stove outer covering to make sealed tighter.

The first sealing member comprises an upper contact disc and a lower contact disc, an annular sealing gasket I is arranged between the upper contact disc and the lower contact disc, an annular sealing gasket II is fixedly arranged above the upper contact disc, an annular sealing gasket III is fixedly arranged below the lower contact disc, the annular sealing gasket I is tightened on the outer cylinder, the annular sealing gasket II is located in the limiting groove, the annular sealing gasket III is located in the supporting groove, the second sealing member is an annular sealing belt, the cross section of the annular sealing belt is formed by overlapping wavy belt surfaces, the top end of the annular sealing belt is propped up between the first sealing member and the outer cylinder, a limiting block is arranged on the outer cylinder, and the bottom end of the annular sealing belt is propped up against the limiting block.

By adopting the technical scheme, the combination of the upper contact disc, the lower contact disc and the annular sealing gasket can well form a matched sealing assembly, which is beneficial to keeping the air pressure in the furnace stable and maintaining the closed environment.

The inner wall of the top side of the outer cylinder is provided with a supporting block, the edge of the inner cylinder is lapped on the supporting block, and a gap is reserved between the bottom of the muffle and the inner wall of the furnace shell.

Through adopting above-mentioned technical scheme, the inner tube is taken and is installed in the furnace body on the supporting shoe, and the inner tube installation of being convenient for leaves the gap between muffle bottom and the stove outer covering inner wall, provides the thermal expansion space of urceolus.

The top end of the furnace shell is rotationally provided with a rocker arm, the rocker arm is connected with a hand wheel through threads, locking blocks are arranged on two sides of the furnace cover, an opening matched with the rocker arm is formed in the locking blocks, and when the rocker arm is rotationally inserted into the opening, the hand wheel is screwed on the locking blocks through threads.

Through adopting above-mentioned technical scheme, using Ma Fushi, the closure of control bell that the setting of rocking arm can be more convenient, the degree of sealing of muffle can be guaranteed in the setting of locking piece.

In summary, the utility model has the following beneficial effects:

1. the sealing component between the furnace shell and the furnace cover, the first sealing component is under the limitation of the limiting groove and the supporting groove, when the temperature in the furnace body rises, the extrusion force of the sealing component to the furnace cover and the furnace shell is larger, so that the sealing is tighter, the sealing effect is improved, and the air leakage problem caused by deformation of the furnace body and the furnace cover under the excessively high air temperature is avoided.

2. The section of thick bamboo wall of urceolus has been established to the wave, has increased section of thick bamboo wall thickness for the furnace body is more firm, and the wave material increases its rigidity, and deformation resistance is more, can cushion furnace body and bell deformation and the problem of avoiding the stove mouth gas leakage that the furnace body material warp leads to, in order to prevent the furnace body damage.

3. Three annular sealing gaskets between the upper contact disc and the lower contact disc can ensure the tightness of the outer cylinder and the furnace cover, thereby enhancing the internal stability of the furnace chamber.

Drawings

FIG. 1 is a schematic view of the overall cross-sectional structure of the present utility model;

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

In the figure: 1. a limiting block; 2. a second seal; 3. a rocker arm; 4. a hand wheel; 5. a furnace cover; 6. a locking piece; 7. a furnace shell; 8. an outer cylinder; 9. an inner cylinder; 10. reinforcing edges; 11. a lower contact plate; 12. an upper contact plate; 13. a limit groove; 14. annular sealing gaskets II; 15. an annular sealing gasket I; 16. an annular sealing gasket III; 17. a support groove; 18. a first seal; 19. a seal assembly; 20. a muffle; 21. and a supporting block.

Detailed Description

The utility model is described in further detail below in connection with fig. 1-2.

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

Examples:

referring to fig. 1-2, the oversized nitriding furnace bearing base type muffle in the utility model sequentially comprises a furnace shell 7, an outer cylinder 8 and an inner cylinder 9 from outside to inside, wherein the bottom of the outer cylinder 8 is connected with the muffle 20, a furnace cover 5 is arranged above the furnace shell 7, the furnace cover 5 is buckled at the top of the outer cylinder 8, a sealing component 19 is arranged between the furnace shell 7 and the furnace cover 5, the sealing component 19 is arranged outside the outer cylinder 8, the sealing component 19 comprises a first sealing element 18 and a second sealing element 2, the first sealing element 18 is arranged between the furnace cover 5 and the furnace shell 7, the top end of the second sealing element 2 is inserted between the first sealing element 18 and the outer wall of the outer cylinder 8, the bottom end of the second sealing element is fixedly connected with the outer wall of the outer cylinder 8, and when the furnace body is in bulge deformation, the outer cylinder 8 pushes the second sealing element 2 to squeeze the first sealing element 18 on the furnace cover 5.

The sealing component 19 is used as a sealing device in the furnace, so that the air pressure impact on the furnace body and the furnace cover 5 caused by the expansion of the cavity body caused by the excessive air temperature due to heating is relieved. The second seal 2 is combined with the first seal 18 to provide a better seal if bulging of the furnace occurs.

Referring to fig. 1, the walls of the outer cylinder 8 and the inner cylinder 9 are wavy, when the temperature in the cavity is increased, the gas in the furnace expands, so that the furnace cavity is expanded, the wavy surface can play a certain role in buffering, and the deformation degree of the furnace wall is slowed down to a certain extent.

Referring to fig. 1-2, the first sealing member 18 includes an upper contact disc 12 and a lower contact disc 11, a first annular sealing gasket 15 is disposed between the upper contact disc 11 and the lower contact disc 11, a second annular sealing gasket 14 is fixedly disposed above the upper contact disc 12, a third annular sealing gasket 16 is fixedly disposed below the lower contact disc 11, the first annular sealing gasket 15 is tightened on the outside, the second annular sealing gasket 14 is located in the limiting groove 13, the third annular sealing gasket 16 is located in the supporting groove 17, the second sealing member 2 is an annular sealing belt, the cross section of the annular sealing belt is formed by overlapping wave-shaped belt surfaces, the top end of the annular sealing belt is propped up between the first sealing member 18 and the outer barrel 8, a limiting block 1 is disposed on the outer barrel 8, and the bottom end of the annular sealing belt is propped up against the limiting block 1, so that in this embodiment, the top of the annular sealing belt is reversely pressed between the reinforced edges 10 and 5 by the first sealing member 18, thereby forming a seal between the reinforced edges 10 and 5.

The combination of the upper and lower contact plates 11 and the annular sealing gasket 15 can well fix the first sealing element 18, and the sealing assembly 19 provides buffering and sealing effects for temperature change in the furnace to a certain extent in the heating process, so that the stability of the air pressure in the furnace is facilitated.

Referring to fig. 1, a limit groove 13 is formed in the bottom edge of the furnace cover 5, a supporting groove 17 is formed in the inner side of the top edge of the furnace shell 7, a first sealing element 18 is arranged between the limit groove 13 and the supporting groove 17, a circle of reinforced edge 10 is arranged at the top of the outer cylinder 8, and the top end of the second sealing element 2 is located between the bottom of the first sealing element 18 and the reinforced edge 10.

During the heating process, the limiting groove 13 is designed to prevent the second annular sealing gasket 14 from being excessively displaced, and the limiting groove and the supporting groove 17 cooperate to form a space capable of accommodating the first sealing element 18. Gaps are reserved between the bottoms of the muffle 20 and the inner wall of the furnace shell 7, the structure can compensate for the thermal expansion of some muffle 20, in addition, the sealing component 19 can also prevent the air leakage in the furnace caused by overlarge internal pressure due to temperature rise in the working process of the equipment, and the larger the extrusion force of the sealing component 19 to the furnace cover 5 and the furnace shell 7 is, so that the furnace body is tightly sealed.

Referring to fig. 1, a rocker arm 3 is rotatably arranged at the top end of a furnace shell 7, a hand wheel 4 is connected to the rocker arm 3 in a threaded manner, locking blocks 6 are arranged on two sides of the furnace cover 5, an opening matched with the rocker arm 3 is formed in the locking blocks 6, and when the rocker arm 3 is rotatably inserted into the opening, the hand wheel 4 is screwed on the locking blocks 6 through threads.

When the equipment is used, the closing tightness of the furnace cover 5 can be controlled more conveniently through the arrangement of the rocker arm 3, and the sealing degree of the muffle 20 can be ensured through the arrangement of the locking block 6.

Before use, the tightness and pressure value of the pipeline valve are checked, and the working conditions of the mechanisms such as the buttons, the push rods, the pull rods and the like are checked, when the furnace is in operation, the materials to be heated are placed in the furnace chamber, the top furnace cover 5 is closed, and the furnace door is closed after the normal detection. The rocker arm 3 fixes the furnace cover 5 on the furnace shell 7, and when heating, the bottom of the furnace chamber is heated and spread upwards and towards two sides, the temperature is increased, the air pressure is increased, the outer cylinder 8 and the inner cylinder 9 are heated and bulge towards two sides, so that the furnace cover 5 is more tightly attached to the furnace shell 7, and the equipment is guaranteed to be airtight. During the heating process, the temperature in the furnace increases, and as shown in the figure, the second sealing member 2 is pushed upwards when the outer cylinder 8 and the inner cylinder 9 are swelled due to the fact that the second sealing member 2 is fixed with the outer cylinder 8 and the furnace shell 7. At this time, the upper part of the second sealing member 2 is pressed towards the first sealing member 18, and the first sealing member 18 abuts against the furnace cover 5 after being pressed, so that the furnace cover 5 is in sealing fit with the furnace shell 7. In addition, the wall of the outer cylinder 8 is designed to be wavy and has elasticity, so that the influence of temperature change on materials can be buffered, and the furnace body is prevented from being damaged. After stopping the furnace, the furnace areas are reduced to the same temperature, and then the parts are taken out.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to specific circumstances.

While the utility model has been described in connection with specific embodiments, it will be apparent to those skilled in the art that the description is intended to be illustrative and not limiting in scope. Various modifications and alterations of this utility model will occur to those skilled in the art in light of the spirit and principles of this utility model, and such modifications and alterations are intended to be within the scope of this utility model.

Claims

1. The utility model provides a super large nitriding furnace bearing base formula muffle, includes stove outer covering (7), urceolus (8) and inner tube (9) from outside-in proper order, the urceolus (8) bottom links up there is muffle (20), stove outer covering (7) top is equipped with bell (5), and bell (5) are detained at urceolus (8) top, a serial communication port, be equipped with seal assembly (19) between stove outer covering (7) and bell (5), just seal assembly (19) establish in urceolus (8) outside, seal assembly (19) include first sealing member (18) and second sealing member (2), first sealing member (18) are established between bell (5) and stove outer covering (7), the top of second sealing member (2) is inserted and is established between first sealing member (18) and urceolus (8) outer wall, and its bottom links firmly with urceolus (8) outer wall, and when the furnace body is expanded and is warp, urceolus (8) promote second sealing member (2) to extrude first sealing member (18) on bell (5).

2. The oversized nitriding furnace load-bearing base muffle according to claim 1, characterized in that the lateral walls of the outer cylinder (8) are provided as waves.

3. The oversized nitriding furnace load-bearing base type muffle according to claim 1 or 2, wherein the bottom edge of the furnace cover (5) is provided with a limit groove (13), the inner side of the top edge of the furnace shell (7) is provided with a supporting groove (17), the first sealing element (18) is arranged between the limit groove (13) and the supporting groove (17), the top of the outer cylinder (8) is provided with a circle of reinforced edge (10), the top end of the second sealing element (2) is positioned between the bottom of the first sealing element (18) and the reinforced edge (10), and the bottom end of the second sealing element (2) is fixedly connected with the outer cylinder (8).

4. A oversized nitriding furnace load-bearing base muffle according to claim 3, wherein the first sealing element (18) comprises an upper contact disc (12) and a lower contact disc (11), an annular sealing gasket one (15) is arranged between the upper contact disc (11) and the lower contact disc (11), an annular sealing gasket two (14) is fixedly arranged above the upper contact disc (12), an annular sealing gasket three (16) is fixedly arranged below the lower contact disc (11), the annular sealing gasket one (15) is tightened on the outer cylinder (8), the annular sealing gasket two (14) is positioned in the limiting groove (13), the annular sealing gasket three (16) is positioned in the supporting groove (17), the second sealing element (2) is an annular sealing belt, the cross section of the annular sealing belt is formed by overlapping wave-shaped belt surfaces, the top end of the annular sealing belt is supported between the first sealing element (18) and the outer cylinder (8), and the bottom end of the annular sealing belt is tightly abutted against the limiting block (1) is arranged on the outer cylinder (8).

5. The oversized nitriding furnace load-bearing base type muffle according to claim 1 or 2, wherein a supporting block (21) is arranged on the inner wall of the top side of the outer cylinder (8), the edge of the inner cylinder (9) is lapped on the supporting block (21), and a gap is reserved between the bottom of the muffle (20) and the inner wall of the furnace shell (7).

6. The oversized nitriding furnace bearing base type muffle according to claim 3, wherein the rocker arm (3) is rotatably arranged at the top end of the furnace shell (7), a hand wheel (4) is connected to the rocker arm (3) in a threaded mode, locking blocks (6) are arranged on two sides of the furnace cover (5), openings matched with the rocker arm (3) are formed in the locking blocks (6), and when the rocker arm (3) is rotatably inserted into the openings, the hand wheel (4) is screwed on the locking blocks (6) through threads.