Nitrogen protective cover for rack heat treatment

Abstract

The utility model relates to the technical field of machinery, in particular to a nitrogen protective cover for rack heat treatment, which comprises a nitrogen cover, a support component and gas inlet interfaces, two sides of the nitrogen cover are connected with the lower end of the support component, the gas inlet interfaces are uniformly distributed on the periphery of the nitrogen cover, the nitrogen cover comprises a shell, a gas outlet ring and a sealing cover, and an inner cavity is arranged in the shell. The inner cavity is communicated with the air inlet connector, the sealing cover is fixed to the shell and covers the upper portion of the inner cavity, the center of the sealing cover and the center of the shell are each provided with a through hole, the front side of the shell is provided with an air outlet communicated with the inner cavity, the air outlet ring is arranged in the inner cavity and surrounds the through holes, and the two ends of the air outlet ring are connected with the air outlets. Compared with the prior art, the bracket assembly facilitates the installation of the nitrogen cover and the matching of the gas inlet interface, the gas outlet ring and the gas outlet, so that nitrogen in the shell is uniformly dispersed, the best protection is provided for the rack heat treatment process, and the product defect problem occurring in the heat treatment process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to a nitrogen protective cover for rack heat treatment. Background Art

[0002] When the rack is heat treated, the rack surface needs to be protected by nitrogen. The functions of nitrogen protection are: 1. Effectively clean impurities on the rack surface, prevent metal surface oxidation, and improve the corrosion resistance of the material; 2. At high temperatures, nitrogen reacts with the rack to form a nitride protective film, thereby preventing the rack surface from oxidation.

[0003] The nitrogen protective hoods currently in use have the following problems: 1. The fixing bracket of the nitrogen protective hood has no positioning, making installation inconvenient; 2. The air inlet of the nitrogen protective hood is at the bottom, the nitrogen cannot be effectively filled, and the dispersion is uneven, which reduces the protection strength; 3. The air intake at the bottom of the nitrogen protective hood causes the quenching liquid to backflow into the nitrogen protective hood, and the workpiece is cooled prematurely, posing a quality risk.

[0004] Therefore, it is necessary to design a nitrogen protective cover for rack heat treatment, which is easy to install and can evenly distribute nitrogen to reduce the probability of defects during the heat treatment process. Summary of the invention

[0005] The utility model aims to overcome the deficiencies of the prior art and provides a nitrogen protective cover for rack heat treatment, which is easy to install and can evenly distribute nitrogen, thereby reducing the probability of defects during the heat treatment process.

[0006] In order to achieve the above-mentioned purpose, the utility model designs a nitrogen protective cover for rack heat treatment, comprising a nitrogen cover, a bracket assembly, and an air inlet interface. The two sides of the nitrogen cover are connected to the lower end of the bracket assembly, and the air inlet interfaces are evenly distributed around the nitrogen cover. The nitrogen cover comprises a shell, an air outlet ring, and a sealing cover. The interior of the shell is provided with an inner cavity, which is connected to the air inlet interface. The sealing cover is fixed to the shell, and the sealing cover covers the upper part of the inner cavity. A through hole is respectively provided in the center of the sealing cover and the shell, and an air outlet connected to the inner cavity is provided on the front side of the shell. The air outlet ring is arranged in the inner cavity, the air outlet ring surrounds the outside of the through hole, and the two ends of the air outlet ring are connected to the air outlet.

[0007] The bracket assembly includes a mounting bracket, a fixing bracket, a connecting plate, and a screw. The inner sides of the lower ends of the two mounting brackets are respectively connected to one side of the nitrogen hood. A connecting plate is arranged between the upper ends of the two mounting brackets. The connecting plate and the mounting bracket are fixed with a screw. A fixing bracket is respectively installed on the outer sides of the upper ends of the two mounting brackets.

[0008] A guide groove is arranged on the inner side of the lower end of the mounting bracket, and convex structures are arranged on both sides of the nitrogen cover, and the convex structures are slidably connected with the guide groove.

[0009] The protruding structure and the mounting bracket are locked with a top screw.

[0010] The sealing cover and the housing are fixed by screw two.

[0011] There are four air inlet interfaces.

[0012] The air outlet ring is C-shaped.

[0013] The surface of the air outlet ring is evenly distributed with 6 air outlet holes in the circumferential direction.

[0014] The size of the through hole is larger than the outer diameter of the rack.

[0015] Compared with the prior art, the utility model designs a nitrogen protective cover for rack heat treatment, the bracket assembly is convenient for the installation of the nitrogen cover, the air inlet interface, the air outlet ring and the air outlet are matched to make the nitrogen in the shell evenly dispersed, which provides the best protection for the rack heat treatment process and reduces the product defect problem in the heat treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model.

[0017] Figure 2 It is a top view of the utility model.

[0018] Figure 3 It is a side view of the utility model.

[0019] Figure 4 It is an exploded view of the nitrogen hood of the utility model.

[0020] Figure 5 It is the front view of the nitrogen hood of the utility model.

[0021] Figure 6 For this utility model Figure 5 AA section view. DETAILED DESCRIPTION

[0022] The utility model is now further described with reference to the accompanying drawings.

[0023] See also Figure 1 , Figure 2 and Figure 3 The utility model is a nitrogen protective cover for rack heat treatment, comprising a nitrogen cover, a bracket assembly, and an air inlet interface. Both sides of the nitrogen cover 3 are connected to the lower end of the bracket assembly, and the nitrogen cover 3 is evenly distributed with air inlet interfaces 11 around it.

[0024] See also Figure 4 , Figure 6The nitrogen hood 3 includes a shell 31, an air outlet ring 32, and a sealing cover 33. An inner cavity 35 is provided inside the shell 31, and the inner cavity 35 is connected to the air inlet interface 11. The sealing cover 33 is fixed to the shell 31, and the sealing cover 33 covers the inner cavity 35. A through hole 37 is provided in the center of the sealing cover 33 and the shell 31 respectively. An air outlet 34 connected to the inner cavity 35 is provided on the front side of the shell 31. The air outlet ring 32 is arranged in the inner cavity 35, and the air outlet ring 32 surrounds the outside of the through hole 37. Both ends of the air outlet ring 32 are connected to the air outlet 34.

[0025] The bracket assembly includes a mounting bracket 1, a fixing bracket 2, a connecting plate 5, a screw 4, and a top screw 6. The inner sides of the lower ends of the two mounting brackets 1 are respectively connected to one side of the nitrogen cover 3. A connecting plate 5 is arranged between the upper ends of the two mounting brackets 1. The connecting plate 5 and the mounting bracket 1 are fixed by screws 4. The connecting plate 5 increases the connection strength of the mounting bracket 1. A fixing bracket 2 is respectively installed on the outer sides of the upper ends of the two mounting brackets 1. The fixing bracket 2 is connected to other components to achieve the fixation of the bracket assembly.

[0026] See also Figure 1 , Figure 5 A guide groove 10 is provided on the inner side of the lower end of the mounting bracket 1, and a protrusion structure 36 is provided on both sides of the nitrogen hood 3, and the protrusion structure 36 is slidably connected with the guide groove 10. The protrusion structure 36 and the mounting bracket 1 are locked by a top screw 6. The cooperation of the protrusion structure 36, the guide groove 10, and the top screw 6 realizes the rapid installation and fixation of the nitrogen hood 3 and the bracket assembly.

[0027] The sealing cover 33 and the housing 31 are fixed with screws 7.

[0028] There are four air inlet ports 11 to allow nitrogen to enter the inner cavity 35 evenly.

[0029] The air outlet ring 32 is C-shaped, and 6 exhaust holes are evenly distributed in the circumferential direction of the surface of the air outlet ring 32. The air outlet ring 32 divides the inner cavity 35 into an air inlet cavity 38 and an air outlet cavity 39. The air inlet cavity 38 is located between the air outlet ring 32 and the inner surface of the shell 31, and the air inlet cavity 38 is connected to the air inlet interface 11; the air outlet cavity 39 is located on the inner side of the air outlet ring 32, and the air outlet cavity 39 is connected to the air outlet 34; the air inlet cavity 38 and the air outlet cavity 39 are connected through 6 exhaust holes.

[0030] The size of the through hole 37 is larger than the outer diameter of the rack, so that the rack can pass through the nitrogen cover 3 easily.

[0031] When the utility model is working, nitrogen enters the inner cavity 35 from the air inlet interface 11, and after passing through the air outlet ring 32, the nitrogen is evenly distributed around the through hole 37, and the excess nitrogen in the inner cavity 35 is discharged from the air outlet 34. When the rack passes through the nitrogen cover 3, the nitrogen forms an effective protection in the air outlet ring 32.

[0032] The utility model designs a nitrogen protective cover for rack heat treatment. The bracket assembly is convenient for the installation of the nitrogen cover. The cooperation of the air inlet interface, the air outlet ring and the air outlet makes the nitrogen in the shell evenly dispersed, which provides the best protection for the rack heat treatment process and reduces the product defect problem in the heat treatment process.

Claims

1. A nitrogen protective cover for rack heat treatment, comprising a nitrogen cover, a bracket assembly, and an air inlet interface, characterized in that: Both sides of the nitrogen hood (3) are connected to the lower end of the bracket assembly. The nitrogen hood (3) is evenly distributed with air inlet interfaces (11) around the nitrogen hood (3). The nitrogen hood (3) comprises a shell (31), an air outlet ring (32), and a sealing cover (33). An inner cavity (35) is provided inside the shell (31). The inner cavity (35) is connected to the air inlet interface (11). The sealing cover (33) is fixed to the shell (31), and the sealing cover (33) covers the upper part of the inner cavity (35). A through hole (37) is provided in the center of the sealing cover (33) and the shell (31), respectively. An air outlet (34) connected to the inner cavity (35) is provided on the front side of the shell (31). The air outlet ring (32) is arranged in the inner cavity (35). The air outlet ring (32) surrounds the outside of the through hole (37), and both ends of the air outlet ring (32) are connected to the air outlet (34).

2. The nitrogen protective cover for rack heat treatment according to claim 1, characterized in that: The bracket assembly comprises a mounting bracket (1), a fixing bracket (2), a connecting plate (5), and a screw (4); the inner sides of the lower ends of the two mounting brackets (1) are respectively connected to one side of the nitrogen hood (3); a connecting plate (5) is arranged between the upper ends of the two mounting brackets (1); the connecting plate (5) and the mounting bracket (1) are fixed by means of a screw (4); and a fixing bracket (2) is respectively installed on the outer sides of the upper ends of the two mounting brackets (1).

3. The nitrogen protective cover for rack heat treatment according to claim 2, characterized in that: A guide groove (10) is provided on the inner side of the lower end of the mounting bracket (1), and protruding structures (36) are provided on both sides of the nitrogen cover (3), and the protruding structures (36) are slidably connected to the guide groove (10).

4. The nitrogen protective cover for rack heat treatment according to claim 3, characterized in that: The protruding structure (36) and the mounting bracket (1) are locked with a top screw (6).

5. The nitrogen protective cover for rack heat treatment according to claim 1, characterized in that: The sealing cover (33) and the housing (31) are fixed by means of screws (7).

6. The nitrogen protective cover for rack heat treatment according to claim 1, characterized in that: There are four air inlet interfaces (11).

7. The nitrogen protective cover for rack heat treatment according to claim 1, characterized in that: The air outlet ring (32) is C-shaped.

8. The nitrogen protective cover for rack heat treatment according to claim 1, characterized in that: The surface of the air outlet ring (32) has 6 air outlet holes evenly distributed in the circumferential direction.

9. The nitrogen protective cover for rack heat treatment according to claim 1, characterized in that: The size of the through hole (37) is larger than the outer diameter of the rack.

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