Vacuum gas quenching furnace with air filtering structure

Abstract

The utility model discloses a vacuum gas quenching furnace with an air filtering structure, which comprises an outer furnace body and an inner furnace body, the inner furnace body is fixed inside the outer furnace body, a plurality of air suction nozzle groups which are distributed at intervals in the circumferential direction are fixed on the inner wall of the inner furnace body, and each air suction nozzle group comprises a plurality of air suction nozzles which are distributed at intervals from front to back; a filter component is arranged at the air suction end of each air suction nozzle, an end cover is connected to the air suction end of each air suction nozzle, one end of each filter component is connected with the corresponding end cover, the other end of each filter component is inserted into the corresponding air suction nozzle, and an air inlet hole is formed in the middle of each end cover. The filtering part is used for filtering impurities in air flowing through the filtering part; according to the utility model, impurities can be prevented from entering the vacuum pump through the air suction nozzle, so that the vacuum pump connected with the air suction nozzle can be prevented from being blocked by the impurities or worn by the impurities.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum air quenching furnaces, in particular to a vacuum air quenching furnace with an air filtering structure. Background Art

[0002] A vacuum air quenching furnace is a device used to perform heat treatment on workpieces. The vacuum air quenching furnace currently on the market includes an outer furnace body and an inner furnace body, the inner furnace body is fixed inside the outer furnace body, and a plurality of suction nozzle groups distributed at circumferential intervals are fixed on the inner wall of the inner furnace body, and each suction nozzle group includes a plurality of suction nozzles distributed at intervals from front to back; when the workpiece is placed in the vacuum air quenching furnace, and after the furnace door of the vacuum air quenching furnace is closed to the outer furnace body and the inner furnace body, a vacuum pump connected to the suction nozzle group is used to evacuate the inner cavity of the inner furnace body, and after the inner furnace body is evacuated, the vacuum air quenching furnace can start heat treatment on the workpiece located inside the inner furnace body; however, in the structure of the vacuum air quenching furnace currently on the market, since no filtering device is provided on the suction end of the suction nozzle, when the vacuum pump extracts the air located inside the inner furnace body through the suction nozzle, impurities mixed in the air will enter the vacuum pump through the suction nozzle, which will cause the vacuum pump to be stuck or worn by the impurities, that is, it will affect the service life of the vacuum pump. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a vacuum air quenching furnace with an air filtering structure, which can prevent impurities from entering the vacuum pump through the suction nozzle, thereby preventing the vacuum pump connected to the suction nozzle from being stuck or worn by impurities.

[0004] The utility model discloses a vacuum air quenching furnace with an air filtering structure, comprising an outer furnace body and an inner furnace body, wherein the inner furnace body is fixed inside the outer furnace body, and a plurality of suction nozzle groups distributed at intervals in the circumferential direction are fixed on the inner wall of the inner furnace body, and each suction nozzle group comprises a plurality of suction nozzles distributed at intervals from front to back; a filter component is arranged at the suction end of each suction nozzle, and an end cover is connected to the suction end of each suction nozzle, one end of the filter component is connected to the end cover, and the other end of the filter component is inserted into the suction nozzle, and an air inlet hole is arranged in the middle of the end cover, and when the suction nozzle absorbs air located inside the inner furnace body through the air inlet hole, the filter component is used to filter impurities in the air flowing through the filter component.

[0005] After the utility model adopts the above structure, when the vacuum pump connected to the suction nozzle draws air located inside the inner furnace body, the filter component located at the suction end of the suction nozzle can filter impurities in the air from the inner furnace body, thereby preventing impurities from entering the vacuum pump through the suction nozzle, and further preventing the vacuum pump connected to the suction nozzle from being stuck or worn by impurities, that is, the service life of the vacuum pump can be extended.

[0006] The utility model discloses a vacuum air quenching furnace with an air filtering structure, wherein the filter component comprises a support cylinder with an opening at one end, the opening end of the support cylinder faces the end cover, the support cylinder is inserted into the air suction end of the air suction nozzle, a gap is left between the outer wall of the support cylinder and the inner wall of the air suction nozzle, a filter screen cylinder with an opening at one end is fixed on the inner wall of the support cylinder, the opening end of the filter screen cylinder faces the end cover, a plurality of air vents are arranged on the side wall of the support cylinder located outside the filter screen cylinder, an annular convex edge is arranged on the outer wall of the open end of the support cylinder, the annular convex edge is threadedly connected to the inner wall of the end cover, and the end cover is sleeved on the air suction end of the air suction nozzle. The outside is threadedly connected to the suction nozzle; by adopting this structure, the end cover can be reliably connected to the suction end of the suction nozzle, and one end of the filter component can be reliably connected to the end cover. When the suction nozzle inhales air, the air from the inner furnace body can flow through the air inlet hole, the filter mesh cylinder and the air vent in sequence and then enter the interior of the suction nozzle, and the air entering the interior of the suction nozzle can be sucked away by the vacuum pump; in the above process, when the air from the inner furnace body flows through the filter mesh cylinder, impurities mixed in the air can be filtered by the filter mesh cylinder, thereby preventing impurities from entering the vacuum pump through the suction nozzle.

[0007] The utility model discloses a vacuum air quenching furnace with an air filtering structure, wherein a regular hexagonal boss is arranged in the middle of one end of a support tube away from an end cover. By adopting this structure, when the support tube needs to be removed from the end cover, the regular hexagonal boss can cooperate with a wrench, thereby facilitating the wrench to unscrew the support tube from the end cover. After the support tube is removed from the end cover, the filter screen tube located inside the support tube can be conveniently cleaned.

[0008] The utility model discloses a vacuum air quenching furnace with an air filtering structure, wherein the outer side wall of the end cover is a regular hexagonal structure; by adopting this structure, when the end cover and the air suction end of the air suction nozzle are tightened or loosened, the outer side wall of the end cover can cooperate with the wrench, thereby facilitating the wrench to tighten the end cover onto the air suction end of the air suction nozzle, or facilitating the wrench to unscrew the end cover from the air suction end of the air suction nozzle.

[0009] The utility model discloses a vacuum air quenching furnace with an air filtering structure, wherein each vent hole is inclined from the inside to the outside toward a side away from the end cover; by arranging the vent holes in such a structure, after the air from the inner furnace body enters the inside of the filter screen cylinder and the support cylinder through the air inlet hole, the vent holes arranged in an inclined manner can guide the air filtered by the filter screen cylinder, so as to facilitate the filtered air to enter the air suction nozzle.

[0010] The utility model provides a vacuum air quenching furnace with an air filtering structure, wherein the filter screen cylinder is welded and fixed on the inner side of a supporting cylinder; after adopting this structure, the filter screen cylinder can be reliably fixed on the inner side of the supporting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0012] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure after the end cover and the filter component are assembled with the suction end of the suction nozzle. DETAILED DESCRIPTION

[0014] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0015] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0016] like Figure 1-2 As shown, the vacuum air quenching furnace with an air filtering structure of the utility model comprises an outer furnace body 1 and an inner furnace body 2, the inner furnace body 2 is fixed inside the outer furnace body 1, and a plurality of suction nozzle groups distributed at intervals in the circumferential direction are fixed on the inner wall of the inner furnace body 2, and each suction nozzle group comprises a plurality of suction nozzles 3 distributed at intervals from front to back; a filter component is provided at the suction end of each suction nozzle 3, and an end cover 4 is connected to the suction end of each suction nozzle 3, one end of the filter component is connected to the end cover 4, and the other end of the filter component is inserted into the suction nozzle 3, and an air inlet hole 41 is provided in the middle of the end cover 4, and when the suction nozzle 3 absorbs air located inside the inner furnace body 2 through the air inlet hole 41, the filter component is used to filter impurities in the air flowing through the filter component.

[0017] The filter component includes a support cylinder 5 with an open end, the open end of the support cylinder 5 faces the end cover 4, the support cylinder 5 is inserted into the suction end of the suction nozzle 3, and a gap is left between the outer wall of the support cylinder 5 and the inner wall of the suction nozzle 3. A filter screen cylinder 6 with an open end is fixed on the inner wall of the support cylinder 5, and the open end of the filter screen cylinder 6 faces the end cover 4. A plurality of vents 51 are arranged on the side wall of the support cylinder 5 located outside the filter screen cylinder 6, and an annular convex edge 52 is arranged on the outer wall of the open end of the support cylinder 5. The annular convex edge 52 is threadedly connected to the inner wall of the end cover 4, and the end cover 4 is sleeved on the outer wall of the suction end of the suction nozzle 3. The filter element is connected to the end of the inner furnace body by threading. When the air is sucked in by the air nozzle, the air from the inner furnace body can flow through the air inlet, the filter screen cylinder and the air vent in sequence and then enter the interior of the air suction nozzle. The air entering the interior of the air suction nozzle can be sucked away by the vacuum pump. In the above process, when the air from the inner furnace body flows through the filter screen cylinder, the impurities mixed in the air can be filtered by the filter screen cylinder, thereby preventing the impurities from entering the vacuum pump through the air suction nozzle.

[0018] A regular hexagonal boss 53 is provided in the middle of the end of the support tube 5 away from the end cover 4. By adopting this structure, when the support tube needs to be removed from the end cover, the regular hexagonal boss can cooperate with a wrench, thereby facilitating the wrench to unscrew the support tube from the end cover. After the support tube is removed from the end cover, the filter screen tube located inside the support tube can be easily cleaned.

[0019] The outer wall of the end cover 4 is a regular hexagonal structure; by adopting this structure, when the end cover and the suction end of the suction nozzle are tightened or loosened, the outer wall of the end cover can cooperate with the wrench, thereby facilitating the wrench to tighten the end cover onto the suction end of the suction nozzle, or facilitating the wrench to unscrew the end cover from the suction end of the suction nozzle.

[0020] Each vent hole 51 is inclined from the inside to the outside toward the side away from the end cover 4; by setting the vent holes to this structure, after the air from the inner furnace body enters the filter mesh cylinder and the interior of the support cylinder through the air inlet hole, the inclined vent holes can guide the air filtered by the filter mesh cylinder, so that the filtered air can enter the air intake nozzle.

[0021] The filter screen cartridge 6 is welded and fixed to the inner side of the support cartridge 5; by adopting this structure, the filter screen cartridge can be reliably fixed to the inner side of the support cartridge.

[0022] During use of the utility model, when the vacuum pump connected to the suction nozzle draws air located inside the inner furnace body through the suction nozzle, the air from the inner furnace body can flow through the air inlet hole, the filter screen cylinder and the vent hole in sequence and then enter the interior of the suction nozzle, and the air entering the interior of the suction nozzle can be sucked away by the vacuum pump; in the above process, when the air from the inner furnace body flows through the filter screen cylinder, the impurities mixed in the air can be filtered by the filter screen cylinder, thereby preventing the impurities from entering the vacuum pump through the suction nozzle, that is, preventing the vacuum pump from being stuck or worn by the impurities; when it is necessary to clean the filter screen cylinder, first remove the end cover from the suction end of the suction nozzle, then remove the support cylinder from the end cover, and then start cleaning the filter screen cylinder, and after the cleaning of the filter screen cylinder is completed, reconnect the support cylinder to the end cover, and finally reinstall the end cover on the suction end of the suction nozzle.

[0023] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A vacuum air quenching furnace with an air filtering structure, comprising an outer furnace body (1) and an inner furnace body (2), wherein the inner furnace body (2) is fixed inside the outer furnace body (1), and a plurality of suction nozzle groups are fixed on the inner wall of the inner furnace body (2) and are distributed at intervals in the circumferential direction, and each of the suction nozzle groups comprises a plurality of suction nozzles (3) distributed at intervals from front to back; characterized in that: A filter component is provided at the air intake end of each of the air intake nozzles (3), and an end cover (4) is connected to the air intake end of each of the air intake nozzles (3). One end of the filter component is connected to the end cover (4), and the other end of the filter component is inserted into the air intake nozzle (3). An air inlet hole (41) is provided in the middle of the end cover (4). When the air intake nozzle (3) absorbs air located inside the inner furnace body (2) through the air inlet hole (41), the filter component is used to filter impurities in the air flowing through the filter component.

2. The vacuum air quenching furnace with an air filtration structure according to claim 1, characterized in that: The filter component comprises a support cylinder (5) with an open end, the open end of the support cylinder (5) facing the end cover (4), the support cylinder (5) is inserted into the air suction end of the air suction nozzle (3), a gap is left between the outer wall of the support cylinder (5) and the inner wall of the air suction nozzle (3), a filter screen cylinder (6) with an open end is fixed on the inner wall of the support cylinder (5), the open end of the filter screen cylinder (6) faces the end cover (4), a plurality of ventilation holes (51) are arranged on the side wall of the support cylinder (5) located outside the filter screen cylinder (6), an annular convex edge (52) is arranged on the outer wall of the open end of the support cylinder (5), the annular convex edge (52) is threadedly connected to the inner wall of the end cover (4), and the end cover (4) is sleeved on the outside of the air suction end of the air suction nozzle (3) and is threadedly connected to the air suction nozzle (3).

3. The vacuum air quenching furnace with an air filtration structure according to claim 2, characterized in that: A regular hexagonal boss (53) is provided in the middle of one end of the support tube (5) away from the end cover (4).

4. The vacuum air quenching furnace with an air filtration structure according to claim 2, characterized in that: The outer side wall of the end cover (4) is a regular hexagonal structure.

5. The vacuum air quenching furnace with an air filtration structure according to claim 2, characterized in that: Each of the vent holes (51) is inclined from the inside to the outside toward a side away from the end cover (4).

6. The vacuum air quenching furnace with an air filtering structure according to claim 2, characterized in that: The filter screen cylinder (6) is welded and fixed on the inner side of the support cylinder (5).

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