Furnace door structure for horizontal nitriding furnace

Abstract

The utility model belongs to the technical field of heat treatment equipment, and relates to a furnace door structure for a horizontal nitriding furnace, which comprises a furnace door body, a lip-shaped sealing strip is arranged between the furnace door body and a muffle, an end socket structure matched with the muffle is further arranged on the inner side of the furnace door body, and the end socket structure is provided with a flow guide structure for guiding airflow into the furnace. According to the utility model, the problems of untight sealing, condensed water accumulation in the post-oxidation stage and the like in the prior art are solved; through the design of the lip-shaped sealing strip, the sealing and attaching contact area can be larger, so that ammonia gas is effectively prevented from overflowing, and the sealing effect is greatly improved; through the design of the end socket structure, the end socket has a flow guide effect, air flow can be prevented from flowing to the water cooling cavity, the two functions of flow guide and condensation prevention are achieved, and condensation water gathering can be avoided while the flow guide effect is improved; the utility model has the advantages of simple structure, stability, reliability, convenience, effectiveness, improved sealing effect, diversion and condensation prevention functions and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat treatment equipment, and in particular relates to a furnace door structure for a horizontal nitriding furnace. Background Art

[0002] During the operation of the nitriding furnace, the furnace door needs to be opened frequently to allow workpieces to enter and exit. A tight and precise sealing device is required between the muffle and the furnace door. The existing sealing device uses a circular sealing strip. However, under the ammonia atmosphere in the furnace, the circular sealing strip is limited by the flange processing conditions and is prone to leakage, which makes the user's workshop smell of ammonia and is also not good for the health of the operator. In addition, the gap between the furnace door and the muffle is too large, which makes the water vapor contained in the atmosphere in the post-oxidation stage easily gather near the furnace cooling water cavity, generating condensed water, which needs to be manually wiped off after each furnace is completed. Utility Model Content

[0003] The purpose of the utility model is to solve the defects and shortcomings in the prior art and to design a furnace door structure for a horizontal nitriding furnace which is simple in structure, stable and reliable, convenient and effective, improves the sealing effect, and has both the function of guiding flow and preventing condensation.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a furnace door structure for a horizontal nitriding furnace, including a furnace door body, a lip-shaped sealing strip is provided between the furnace door body and the muffle, and a head structure matching the muffle is also provided on the inner side of the furnace door body, and the head structure has a guide structure for guiding the airflow into the furnace.

[0005] Preferably, a sealing groove matching the lip-shaped sealing strip is provided on the inner side of the furnace door body.

[0006] Preferably, a water cooling cavity is provided on the furnace door body and the muffle.

[0007] Preferably, the two water-cooling chambers are respectively arranged on the left and right sides of the lip sealing strip.

[0008] Preferably, the head structure covers the two water-cooling chambers.

[0009] Preferably, the muffle side wall is provided with a guide plate, and the guide structure and the guide plate are designed to cooperate with each other to prevent the airflow from entering the gap between the head structure and the muffle.

[0010] After adopting the above technical solution, the furnace door structure for a horizontal nitriding furnace provided by the utility model has the following beneficial effects:

[0011] The utility model solves the problems of poor sealing and condensed water accumulation in the post-oxidation stage in the prior art by optimizing the original circular sealing strip into a lip-shaped sealing strip; the design of the lip-shaped sealing strip can make the sealing contact area larger, thereby effectively preventing the overflow of ammonia and greatly improving the sealing effect; the design of the head structure makes the head have a diversion effect, which can prevent the airflow from flowing to the water-cooling chamber, and has both the functions of diversion and condensation prevention, that is, it can improve the diversion effect while preventing condensed water from gathering. Therefore, the utility model has the advantages of simple structure, stability and reliability, convenience and effectiveness, and improves the sealing effect, while having both the diversion and condensation prevention functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a furnace door structure for a horizontal nitriding furnace of the utility model;

[0013] Figure 2 It is an enlarged schematic diagram of the structure of the furnace door body in the utility model.

[0014] Among them: furnace door body 1, muffle 2, lip sealing strip 3, head structure 4, sealing groove 5, water cooling cavity 6, guide plate 7. DETAILED DESCRIPTION

[0015] The present invention is further described clearly and completely below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0017] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0018] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0019] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0020] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0021] The utility model discloses a furnace door structure for a horizontal nitriding furnace. Figure 1-2 As shown, it includes a furnace door body 1, a lip-shaped sealing strip 3 is provided between the furnace door body 1 and the muffle 2, specifically, a sealing groove 5 matching the lip-shaped sealing strip 3 is provided on the inner side of the furnace door body 1, further, a water-cooling cavity 6 is provided on the furnace door body 1 and the muffle 2, the two water-cooling cavities 6 are respectively arranged on the left and right sides of the lip-shaped sealing strip 3, and are both located at the furnace mouth, and a head structure 4 matching the muffle 2 is also provided on the inner side of the furnace door body 1, the head structure 4 covers the two water-cooling cavities 6, and the head structure 4 has a guide structure for guiding the airflow into the furnace, specifically, a guide plate 7 is provided on the side wall of the muffle 2, the guide structure and the guide plate 7 are designed to prevent the airflow from entering the gap between the head structure 4 and the muffle 2, thereby preventing water vapor from gathering near the water-cooling cavity 6 of the furnace mouth to generate condensed water.

[0022] The utility model discloses a furnace door structure for a horizontal nitriding furnace, which solves the problems of poor sealing and accumulation of condensed water in the post-oxidation stage in the prior art; the design of the lip-shaped sealing strip 3 can make the sealing contact area larger, thereby effectively preventing the overflow of ammonia and greatly improving the sealing effect; the design of the head structure 4 makes the head have a diversion effect, which can prevent the airflow from flowing to the water-cooling chamber 6, and has both the functions of diversion and prevention of condensation, that is, it can improve the diversion effect while preventing the accumulation of condensed water.

[0023] In summary, the utility model provides a furnace door structure for a horizontal nitriding furnace, which has the advantages of simple structure, stability and reliability, convenience and effectiveness, improved sealing effect, flow guidance and condensation prevention functions, etc. It has great market value and is worthy of wide promotion and application.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A furnace door structure for a horizontal nitriding furnace, comprising a furnace door body (1), characterized in that: A lip-shaped sealing strip (3) is provided between the furnace door body (1) and the muffle (2), and a head structure (4) matching the muffle (2) is also provided on the inner side of the furnace door body (1), and the head structure (4) has a flow guiding structure for guiding the airflow into the furnace.

2. A furnace door structure for a horizontal nitriding furnace according to claim 1, characterized in that: A sealing groove (5) matching the lip-shaped sealing strip (3) is provided on the inner side of the furnace door body (1).

3. The furnace door structure for a horizontal nitriding furnace according to claim 1, characterized in that: The furnace door body (1) and the muffle (2) are both provided with a water cooling cavity (6).

4. A furnace door structure for a horizontal nitriding furnace according to claim 3, characterized in that: The two water cooling chambers (6) are respectively arranged on the left and right sides of the lip-shaped sealing strip (3).

5. The furnace door structure for a horizontal nitriding furnace according to claim 3, characterized in that: The sealing head structure (4) covers the two water-cooling chambers (6).

6. The furnace door structure for a horizontal nitriding furnace according to claim 1, characterized in that: The side wall of the muffle (2) is provided with a guide plate (7), and the guide structure and the guide plate (7) are designed to cooperate with each other to prevent the airflow from entering the gap between the head structure (4) and the muffle (2).

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