CN215560599U

CN215560599U - Novel sealing structure of bell-type nitriding furnace

Info

Publication number: CN215560599U
Application number: CN202120911551.9U
Authority: CN
Inventors: 陈曦
Original assignee: Hephaes Heat Treatment Systems Jiangsu Co ltd
Current assignee: Hephaes Heat Treatment Systems Jiangsu Co ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-01-18
Anticipated expiration: 2031-04-29

Abstract

The utility model provides a novel sealing structure of a bell-type nitriding furnace, which comprises a heat insulation packing and a muffle, wherein the heat insulation packing is fixedly arranged on a furnace platform of the bell-type nitriding furnace; the lower port of the muffle is arranged to be a tip matched with the heat insulation packing; when closing the bell-type nitriding furnace cover, the most advanced embedding of muffle in the thermal-insulated packing to form thermal-insulated chamber with the sealed face of stove top and the sealed face cooperation of stove cover, when having solved stove top and heating mantle and seal through circular silicon rubber circle, must set up the water-cooling chamber, and water-cooling chamber department appears cold and hot deformation easily and leads to the problem of cooling water leakage, need not to set up the water-cooling chamber again, has simplified seal structure.

Description

Novel sealing structure of bell-type nitriding furnace

Technical Field

The utility model relates to the technical field of sealing, in particular to a novel sealing structure of a bell-type nitriding furnace.

Background

The bell-type nitriding furnace is widely used in the gas nitriding heat treatment process of mechanical parts such as bearings, gears and the like, a workpiece is placed on a furnace platform of the bell-type nitriding furnace, the placed workpiece is reversely buckled in the furnace by a heating cover after the placement is finished for heating and nitriding, and gases such as nitrogen, ammonia, carbon dioxide and the like are introduced into the furnace step by step in the nitriding process, so that the furnace platform and the heating cover are required to be strictly sealed in order to prevent the ammonia in the furnace from being leaked outwards in the nitriding process.

The traditional sealing mode is that a circular silicon rubber ring is adopted for sealing, referring to fig. 1, in consideration of the influence of high-temperature gas in a furnace on the silicon rubber ring, a water cooling cavity is formed in the lower portion of the silicon rubber ring, cooling water is adopted for cooling the silicon rubber ring, the water cooling cavity is a welded sealing cavity, and therefore metal cold and hot deformation occurs in the actual use process, and the cooling water leakage fault often occurs; and the circular section of the circular silicon rubber sealing ring is small in compression amount, so that the pressing force is required to be increased manually or hydraulically and the like to increase the compression amount of the circular silicon rubber sealing ring to ensure the sealing of the circular silicon rubber sealing ring, the operation is complex and the use efficiency of equipment is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The novel sealing structure of the bell-type nitriding furnace disclosed by the utility model solves the problems that a water-cooling cavity is required to be arranged when a furnace platform and a heating cover are sealed by a circular silicon rubber ring, and cooling water leakage is caused by cold and heat deformation at the water-cooling cavity easily, the water-cooling cavity is not required to be arranged, and the sealing structure is simplified.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model discloses a novel sealing structure of a bell-type nitriding furnace, which comprises a heat insulation packing and a muffle, wherein the heat insulation packing is fixedly arranged on a furnace platform of the bell-type nitriding furnace; the lower port of the muffle is arranged to be a tip matched with the heat insulation packing; when the bell-type nitriding furnace cover is closed, the tip of the muffle is embedded into the heat insulation packing and is matched with the sealing surface of the furnace platform and the sealing surface of the furnace cover to form a heat insulation cavity.

Further, the sealing structure further comprises a sealing knife, the first end of the sealing knife is fixedly connected with the muffle, and when the furnace cover is closed, the second end of the sealing knife is embedded into the heat insulation packing and is matched with the sealing surface of the furnace platform and the sealing surface of the furnace cover to form a heat insulation cavity.

Further, a sealing ring is arranged between the sealing surface of the furnace platform and the sealing surface of the furnace cover.

Further, the sealing ring is a silicon rubber sealing ring.

Further, the cross-sectional shape of sealing washer is V-arrangement.

The beneficial technical effects are as follows:

1. the utility model discloses a novel sealing structure of a bell-type nitriding furnace, which comprises a heat insulation packing and a muffle, wherein the heat insulation packing is fixedly arranged on a furnace platform of the bell-type nitriding furnace; the lower port of the muffle is arranged to be a tip matched with the heat insulation packing; when the furnace cover of the bell-type nitriding furnace is closed, the tip of the muffle is embedded into the heat insulation packing and is matched with the sealing surface of the furnace platform and the sealing surface of the furnace cover to form a heat insulation cavity, so that the problems that a water cooling cavity is required to be arranged when the furnace platform and the heating cover are sealed by a circular silicon rubber ring, and cooling water leakage is caused because the cold and heat deformation is easy to occur at the water cooling cavity are solved, the water cooling cavity is not required to be arranged, and the sealing structure is simplified;

2. according to the utility model, the tip of the muffle is embedded into the heat insulation packing and is matched with the sealing surface of the furnace platform and the sealing surface of the furnace cover to form a heat insulation cavity, so that the influence of high-temperature gas in the furnace on the silicon rubber ring can be effectively reduced;

3. according to the utility model, the section of the sealing ring arranged between the sealing surface of the furnace platform and the sealing surface of the furnace cover is V-shaped, so that the problem that the compression amount of the circular section of the circular silicon rubber sealing ring is small and the pressing force needs to be increased manually or hydraulically and the like is solved, and good sealing performance can be ensured without external force pressing.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly described below.

FIG. 1 is a schematic view of a conventional sealing structure in a bell-type nitriding furnace;

FIG. 2 is a schematic view of a novel sealing structure of the bell type nitriding furnace according to the utility model.

The method comprises the following steps of 1-heat insulation packing, 2-muffle, 3-hearth sealing surface, 4-furnace cover sealing surface, 5-sealing knife, 6-sealing ring, 7-water cooling cavity and a-high-temperature gas in the nitriding furnace.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The first embodiment is as follows:

the utility model discloses a novel sealing structure of a bell-type nitriding furnace, which is shown in figure 2 and comprises a heat-insulating packing 1 and a muffle 2, wherein the heat-insulating packing 1 is fixedly arranged on a furnace platform 2 of the bell-type nitriding furnace; the lower port of the muffle 2 is arranged to be a tip matched with the heat insulation packing 1; when closing the bell-type nitriding furnace mantle, muffle 2's most advanced embedding in the thermal-insulated packing 1 to form thermal-insulated chamber with the sealed face of stove top 3 and the sealed face of furnace mantle 4 cooperation, with isolated nitriding furnace interior high-temperature gas, thereby make and need not to set up the water-cooling chamber again and cool off the silica gel sealing washer.

As an embodiment of the utility model, a sealing ring 6 is arranged between the furnace platform cover 3 and the furnace cover 4, preferably, the sealing ring 6 is a silicone rubber sealing ring with a V-shaped cross section, and the compression amount of the silicone rubber sealing ring with the V-shaped cross section is far greater than that of the sealing ring with a circular cross section, so that the problem that the compression amount of the circular cross section of the circular silicone rubber sealing ring is small, pressing force needs to be increased manually or hydraulically, and good sealing performance can be ensured without external force pressing.

Example two:

the second embodiment is different from the first embodiment in that the sealing structure comprises a heat insulation packing 1, a muffle 2 and a sealing knife 5, wherein the heat insulation packing 1 is fixedly installed on a furnace platform 2 of the bell-type nitriding furnace, the first end of the sealing knife 5 is fixedly connected with the muffle 2, and when a furnace cover is closed, the second end of the sealing knife 5 is embedded into the heat insulation packing 1 and is matched with a furnace platform sealing surface 3 and a furnace cover sealing surface 4 to form a heat insulation cavity so as to isolate high-temperature gas in the nitriding furnace, so that the silicon sealing ring is cooled without a water cooling cavity.

According to the novel sealing structure of the bell-type nitriding furnace, the heat insulation packing is combined with the seal knife or the muffle tip to form the heat insulation cavity in front of the silicon rubber seal ring, so that the influence of high-temperature gas in the nitriding furnace on the silicon rubber seal ring is cut off, a water cooling cavity is not required to be arranged, the sealing structure is simplified, and the problem of cooling water leakage is solved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above examples are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a novel seal structure of bell-type nitriding furnace which characterized in that includes:

the heat insulation packing (1), the heat insulation packing (1) is fixedly arranged on a furnace platform of the bell-type nitriding furnace;

the lower port of the muffle (2) is arranged to be a tip matched with the heat insulation packing (1);

when the bell-type nitriding furnace cover is closed, the tip of the muffle (2) is embedded into the heat insulation packing (1) and is matched with the furnace platform sealing surface (3) and the furnace cover sealing surface (4) to form a heat insulation cavity.

2. The novel sealing structure of the bell-type nitriding furnace according to claim 1 is characterized by further comprising a sealing knife (5), wherein a first end of the sealing knife is fixedly connected with the muffle (2), and a second end of the sealing knife (5) is embedded into the heat insulation packing (1) when the furnace cover is closed and is matched with the furnace platform sealing surface (3) and the furnace cover sealing surface (4) to form a heat insulation cavity.

3. The novel sealing structure of the bell type nitriding furnace according to claim 1, characterized in that a sealing ring (6) is arranged between the furnace platform sealing surface (3) and the furnace cover sealing surface (4).

4. The novel sealing structure of the bell type nitriding furnace according to the claim 3, characterized in that the sealing ring (6) is a silicon rubber sealing ring.

5. The novel sealing structure of the bell type nitriding furnace according to claim 3, characterized in that the cross-sectional shape of the sealing ring (6) is V-shaped.