Nitriding furnace with good sealing performance for metal hot working treatment

Abstract

The nitriding furnace with the good sealing performance for metal hot working treatment comprises a shell, the outer wall of the shell is sleeved with an extending top plate and fixedly connected with the extending top plate, a base is arranged at the bottom of the shell, and the outer wall of the base is sleeved with an extending bottom plate and fixedly connected with the extending bottom plate. The shell and the base are connected through a plurality of fixing mechanisms, a high-temperature-resistant sealing ring is fixedly connected to the bottom of the shell, the shell and the base are fixed through the fixing mechanisms, the high-temperature-resistant sealing ring at the bottom of the shell can be inserted into a wedging groove and enters a sealing groove, and when the shell and the base are completely closed, the high-temperature-resistant sealing ring can be sealed. The high-temperature-resistant sealing ring is extruded to deform in the sealing groove so as to completely fill the whole sealing groove, and due to the deformation of the high-temperature-resistant sealing ring, the expansion force for restoring the deformation of the high-temperature-resistant sealing ring can be tightly attached to the inner wall of the sealing groove, so that the sealing effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal heat treatment, in particular to a nitriding furnace for metal heat treatment with good sealing performance. Background Art

[0002] Nitriding furnaces are often used to heat-treat metals during processing. Nitriding is a chemical heat treatment process that allows nitrogen atoms to penetrate into the surface of the workpiece in a certain medium at a certain temperature. Metal products that have been nitrided have excellent wear resistance, fatigue resistance, corrosion resistance, and high temperature resistance.

[0003] The sealing of the nitriding furnace needs to be ensured when it is in use. The sealing method of the existing nitriding furnace is usually to set a sealing ring and a sealing groove at the connection position of the shell and the base, and to achieve sealing by the fit of the sealing ring and the sealing groove. However, this sealing method is too simple and the sealing effect is not good. Therefore, a nitriding furnace for metal hot processing with good sealing is proposed. Utility Model Content

[0004] The utility model aims to provide a nitriding furnace for metal heat treatment with good sealing performance, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nitriding furnace for metal heat treatment with good sealing performance, comprising a shell, an extended top plate is sleeved on the outer wall of the shell and fixedly connected to the extended top plate, a base is arranged at the bottom of the shell, an extended bottom plate is sleeved on the outer wall of the base and fixedly connected to the extended bottom plate, the shell and the base are connected by multiple fixing mechanisms, a high-temperature resistant sealing ring is fixedly connected to the bottom of the shell, a fitting groove is provided on the upper surface of the base for slidingly fitting with the high-temperature resistant sealing ring, a sealing groove is provided at the bottom of the fitting groove, the width of the sealing groove is greater than the width of the high-temperature resistant sealing ring, the height of the high-temperature resistant sealing ring is greater than the sum of the depths of the sealing groove and the fitting groove, sealing plates are respectively arranged on both sides of the fitting groove at the upper end of the base, the sealing plates are annular plates, and a sealing auxiliary groove is provided at the bottom of the shell above the sealing plate for slidingly fitting with the sealing plate.

[0006] As a further preferred embodiment of the present technical solution, the upper surface of the extended bottom plate is aligned with the upper surface of the base, and the bottom of the extended top plate is aligned with the bottom of the shell.

[0007] As a further preferred embodiment of the present technical solution, the fixing mechanism is composed of a clamping bottom block, a clamping top block, a fixing bolt and a nut. The clamping bottom block is located below the extended bottom plate, and the clamping top block is located above the extended top plate. The fixing bolt slides from top to bottom through the clamping top block and the clamping bottom block. A nut is provided at the end of the fixing bolt, and the nut is threadedly matched with the fixing bolt.

[0008] As a further preferred embodiment of the present technical solution, a guide rod is fixedly connected to the upper end of the clamping bottom block, and the upper end of the guide rod slides through a guide groove provided in the clamping top block.

[0009] As a further preferred embodiment of the present technical solution, a support frame is fixedly connected to the bottom of the base.

[0010] As a further preferred embodiment of the present technical solution, an observation port is provided on the side wall of the shell.

[0011] As a further preferred embodiment of the present technical solution, a nitrogen port is provided at the top of the shell.

[0012] The utility model provides a nitriding furnace for metal heat treatment with good sealing performance, which has the following beneficial effects:

[0013] The utility model fixes the shell and the base through a fixing mechanism, and the high-temperature resistant sealing ring at the bottom of the shell will be inserted into the fitting groove and enter the sealing groove. As the shell and the base are completely closed, the high-temperature resistant sealing ring will be squeezed and deformed in the sealing groove, thereby completely filling the entire sealing groove. Due to the deformation of the high-temperature resistant sealing ring, the expansion force of the high-temperature resistant sealing ring to restore the deformation will make it tightly adhere to the inner wall of the sealing groove, thereby greatly improving the sealing effect. At the same time, as the shell and the base are closed, the two sealing plates will be inserted into the two sealing auxiliary grooves, further improving the sealing between the shell and the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the disassembly of the overall structure of the utility model;

[0016] Figure 3 For this utility model Figure 1 The structural diagram of A in the figure;

[0017] Figure 4 This is a schematic diagram of the structure of the connection position between the shell and the base in the utility model;

[0018] In the figure: 1. Shell; 2. Support frame; 3. Base; 4. Fixing mechanism; 5. Observation port; 6. Nitrogen port; 7. Extended bottom plate; 8. Extended top plate; 9. Clamping bottom block; 10. Clamping top block; 11. Fixing bolt; 12. Nut; 13. Guide rod; 14. Guide groove; 15. High temperature resistant sealing ring; 16. Sealing groove; 17. Sealing auxiliary groove; 18. Sealing plate; 19. Fitting groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figures 1 to 4 As shown, in this embodiment, a nitriding furnace for metal heat treatment with good sealing performance includes a shell 1, an outer wall of the shell 1 is sleeved with an extended top plate 8 and fixedly connected to the extended top plate 8, a base 3 is provided at the bottom of the shell 1, an outer wall of the base 3 is sleeved with an extended bottom plate 7 and fixedly connected to the extended bottom plate 7, the shell 1 and the base 3 are connected through a plurality of fixing mechanisms 4, a high-temperature resistant sealing ring 15 is fixedly connected to the bottom of the shell 1, a fitting groove 19 for slidingly fitting with the high-temperature resistant sealing ring 15 is provided on the upper surface of the base 3, a sealing groove 16 is provided at the bottom of the fitting groove 19, the width of the sealing groove 16 is greater than the width of the high-temperature resistant sealing ring 15, the height of the high-temperature resistant sealing ring 15 is greater than the sum of the depths of the sealing groove 16 and the fitting groove 19, the upper end of the base 3 is located on both sides of the fitting groove 19 and is respectively provided with sealing plates 18, the sealing plate 18 is an annular plate, and the bottom of the shell 1 is located above the sealing plate 18 and is provided with a sealing auxiliary groove 17 for slidingly fitting with the sealing plate 18.

[0021] When in use, the shell 1 is placed on the base 3, and the shell 1 and the base 3 are fixed by the fixing mechanism 4. The high temperature resistant sealing ring 15 at the bottom of the shell 1 will be inserted into the fitting groove 19 and enter the sealing groove 16. As the shell 1 and the base 3 are completely closed, since the width of the sealing groove 16 is greater than the width of the high temperature resistant sealing ring 15, and the height of the high temperature resistant sealing ring 15 is greater than the sum of the depths of the sealing groove 16 and the fitting groove 19, the high temperature resistant sealing ring 15 will be squeezed and deformed in the sealing groove 16, thereby completely filling the entire sealing groove 16. Due to the deformation of the high temperature resistant sealing ring 15, its expansion force to restore the deformation will cause it to cling to the inner wall of the sealing groove 16, thereby greatly improving the sealing effect. At the same time, as the shell 1 and the base 3 are closed, the two sealing plates 18 will be inserted into the two sealing auxiliary grooves 17, further improving the sealing between the shell 1 and the base 3.

[0022] The upper surface of the extended bottom plate 7 is aligned with the upper surface of the base 3 , and the bottom of the extended top plate 8 is aligned with the bottom of the shell 1 .

[0023] Among them, the fixing mechanism 4 is composed of a clamping bottom block 9, a clamping top block 10, a fixing bolt 11 and a nut 12. The clamping bottom block 9 is located below the extended bottom plate 7, and the clamping top block 10 is located above the extended top plate 8. The fixing bolt 11 slides from top to bottom to penetrate the clamping top block 10 and the clamping bottom block 9. The end of the fixing bolt 11 is sleeved with a nut 12, and the nut 12 is threadedly matched with the fixing bolt 11.

[0024] When in use, fix the nut 12 and rotate the fixing bolt 11 to bring the clamping top block 10 and the clamping bottom block 9 closer to each other, thereby clamping the extension top plate 8 and the extension bottom plate 7, and further fixing the shell 1 and the base 3.

[0025] The upper end of the clamping bottom block 9 is fixedly connected with a guide rod 13 , and the upper end of the guide rod 13 slides through a guide groove 14 provided in the clamping top block 10 .

[0026] By providing the guide rod 13 and the guide groove 14, the clamping top block 10 and the clamping bottom block 9 can move more smoothly when approaching each other.

[0027] The bottom of the base 3 is fixedly connected to the support frame 2 .

[0028] The nitriding furnace can be propped up by the support frame 2 to prevent the nitriding furnace from directly contacting the ground.

[0029] An observation port 5 is provided on the side wall of the shell 1 , and a nitrogen port 6 is provided at the top of the shell 1 .

[0030] The interior of the nitriding furnace can be observed through the observation port 5 , and nitrogen can be introduced into the interior of the nitriding furnace through the nitrogen port 6 .

[0031] The utility model provides a nitriding furnace for metal heat treatment with good sealing performance, and the specific working principle is as follows:

[0032] When in use, the shell 1 is placed on the base 3, and the shell 1 and the base 3 are fixed by the fixing mechanism 4. The high temperature resistant sealing ring 15 at the bottom of the shell 1 will be inserted into the fitting groove 19 and enter the sealing groove 16. As the shell 1 and the base 3 are completely closed, since the width of the sealing groove 16 is greater than the width of the high temperature resistant sealing ring 15, and the height of the high temperature resistant sealing ring 15 is greater than the sum of the depths of the sealing groove 16 and the fitting groove 19, the high temperature resistant sealing ring 15 will be squeezed and deformed in the sealing groove 16, thereby completely filling the entire sealing groove 16. The deformation of the sealing ring 15 and its expansion force for restoring the deformation will cause it to cling to the inner wall of the sealing groove 16, thereby greatly improving the sealing effect. At the same time, as the shell 1 and the base 3 are closed, the two sealing plates 18 will be inserted into the two sealing auxiliary grooves 17, further improving the sealing between the shell 1 and the base 3; the working principle of the fixing mechanism 4 is to fix the nut 12 and rotate the fixing bolt 11 to bring the clamping top block 10 and the clamping bottom block 9 closer to each other, thereby clamping the extended top plate 8 and the extended bottom plate 7, and then fixing the shell 1 and the base 3.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nitriding furnace for metal heat treatment with good sealing performance, comprising a housing (1), characterized in that: An extended top plate (8) is sleeved on the outer wall of the shell (1) and is fixedly connected to the extended top plate (8); a base (3) is provided at the bottom of the shell (1); an extended bottom plate (7) is sleeved on the outer wall of the base (3) and is fixedly connected to the extended bottom plate (7); the shell (1) and the base (3) are connected via a plurality of fixing mechanisms (4); a high temperature resistant sealing ring (15) is fixedly connected to the bottom of the shell (1); and a fitting groove (19) for slidingly fitting with the high temperature resistant sealing ring (15) is provided on the upper surface of the base (3); A sealing groove (16) is provided at the bottom of the fitting groove (19); the width of the sealing groove (16) is greater than the width of the high temperature resistant sealing ring (15); the height of the high temperature resistant sealing ring (15) is greater than the sum of the depths of the sealing groove (16) and the fitting groove (19); the upper end of the base (3) is located on both sides of the fitting groove (19) and is provided with sealing plates (18), the sealing plates (18) being annular plates; the bottom of the housing (1) is located above the sealing plate (18) and is provided with a sealing auxiliary groove (17) which is slidably fitted with the sealing plate (18).

2. A nitriding furnace for metal heat treatment with good sealing performance according to claim 1, characterized in that: The upper surface of the extended bottom plate (7) is aligned with the upper surface of the base (3), and the bottom of the extended top plate (8) is aligned with the bottom of the shell (1).

3. A nitriding furnace for metal hot working treatment with good sealing performance according to claim 1, characterized in that: The fixing mechanism (4) is composed of a clamping bottom block (9), a clamping top block (10), a fixing bolt (11) and a nut (12); the clamping bottom block (9) is located below the extended bottom plate (7); the clamping top block (10) is located above the extended top plate (8); the fixing bolt (11) slides from top to bottom through the clamping top block (10) and the clamping bottom block (9); a nut (12) is sleeved on the end of the fixing bolt (11); the nut (12) and the fixing bolt (11) are threadedly matched.

4. A nitriding furnace for metal hot working treatment with good sealing performance according to claim 3, characterized in that: The upper end of the clamping bottom block (9) is fixedly connected to a guide rod (13), and the upper end of the guide rod (13) slides through a guide groove (14) provided in the clamping top block (10).

5. The nitriding furnace for metal heat treatment with good sealing performance according to claim 1, characterized in that: The bottom of the base (3) is fixedly connected to a support frame (2).

6. The nitriding furnace for metal heat treatment with good sealing performance according to claim 1, characterized in that: An observation port (5) is provided on the side wall of the housing (1).

7. The nitriding furnace for metal hot working treatment with good sealing performance according to claim 1, characterized in that: The top end of the shell (1) is provided with a nitrogen port (6).

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