A gas carburizing furnace

Abstract

The utility model belongs to the field of carburizing furnace, concretely relates to a gas carburizing furnace, including furnace body, sealing washer, the cover body of setting in the upper opening and the adjusting assembly of setting on the furnace body, the diameter of cover body is greater than the diameter of opening, the furnace body is opened with the limiting ring groove of setting coaxially with opening, the limiting ring groove is provided with the limiting ring, is provided with the gear ring of setting coaxially with the limiting ring on the furnace body, and the gear ring is fixedly installed on the limiting ring, is provided with first limit piece on the inside wall of gear ring, is provided with second limit piece on the side wall of cover body, the lower surface of second limit piece and the lower surface of cover body are located on the same horizontal plane, the side of first limit piece close to furnace body can be with the side of second limit piece away from furnace body abut. Through the setting of limiting ring groove and limiting ring, can limit gear ring in vertical direction and move the range, guarantee gear ring to be able to rotate, keep the locking force of first limit piece to second limit piece, thereby guarantee the sealing effect of furnace body.

Description

Technical Field

[0001] This utility model belongs to the field of carburizing furnace technology, and more specifically, it relates to a gas carburizing furnace. Background Technology

[0002] A gas carburizing furnace is a large-scale industrial piece of equipment specifically designed for gas carburizing heat treatment. Its core purpose is to heat low-carbon steel or low-carbon alloy steel workpieces to high temperatures (typically within the range of 900℃ to 950℃) in a controlled, carbon-rich gas atmosphere (carburizing atmosphere), causing carbon atoms to diffuse from the workpiece surface into the interior, thereby forming a high-carbon-content hardened layer (carburized layer) on the surface while maintaining the toughness and strength of the core. Gas carburizing furnaces mainly include pit furnaces and continuous furnaces.

[0003] The core structure of a pit furnace consists of a high-temperature resistant furnace lining, a sealed furnace tank, a heating system, and a gas circulation device. The pit furnace has vertical channels through which products pass. A sealing plate is installed at the entrance of each channel to seal the opening. To improve the sealing effect, the sealing plate is usually tightly fitted to the inner wall of the channel. However, during the vertical movement of the sealing plate, its sidewalls experience significant friction with the inner wall of the channel. Over time, this wear and tear can occur, creating gaps between the sealing plate and the inner wall of the channel. Consequently, the sealing effect of the pit furnace deteriorates, affecting its processing efficiency.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a gas carburizing furnace in order to achieve a more practical purpose. Utility Model Content

[0005] In view of the problems mentioned in the background art, the present invention provides a gas carburizing furnace, which can avoid friction between the sealing plate and the inner wall of the channel, and ensure the sealing effect of the furnace body.

[0006] The technical solution adopted by this utility model is as follows: a gas carburizing furnace includes a furnace body with an opening, a sealing gasket arranged on the furnace body and coaxially with the opening, a cover arranged above the opening and abutting against the sealing gasket to seal the opening, and an adjustment component arranged on the furnace body to drive the cover to move in the vertical direction. The diameter of the cover is larger than the diameter of the opening.

[0007] The furnace body has a limiting ring groove coaxially arranged with the opening, and a limiting ring is set in the limiting ring groove. A toothed ring is set on the furnace body coaxially arranged with the limiting ring and fixedly installed on the limiting ring. A first limiting member is set on the inner side wall of the toothed ring, and a second limiting member is set on the side wall of the cover. The lower surface of the second limiting member and the lower surface of the cover are located on the same horizontal plane. The side of the first limiting member closer to the furnace body can abut against the side of the second limiting member away from the furnace body.

[0008] The technical principle of this utility model is as follows: by limiting the limiting ring through the limiting ring groove, the movement of the gear ring in the vertical direction can be restricted, ensuring that the gear ring can rotate while maintaining the locking force of the first limiting member on the second limiting member.

[0009] When the furnace body needs to be sealed, the cover is lowered by adjusting the components until it abuts against the sealing gasket and presses it tightly, completing the initial seal (at this time, the lower surface of the second limiting member abuts against the upper surface of the furnace body). Then, the drive gear ring gradually rotates, so that the lower surface of the first limiting member abuts against the upper surface of the second limiting member, keeping the sealing gasket in a compressed state, ensuring the sealing effect of the sealing gasket, thereby ensuring the sealing effect of the furnace body, and at the same time, preventing friction between the cover and the furnace body that would lead to a deterioration in the sealing effect of the furnace body.

[0010] Furthermore, the adjustment component includes a fixing member fixedly installed on the side wall of the furnace body and a first drive member fixedly installed on the fixing member, wherein the power output shaft of the first drive member passes through the fixing member, and the cover is fixedly installed on the power output shaft of the first drive member.

[0011] Furthermore, a sealing flange is coaxially fixed to the surface of the cover near the furnace body, and the diameter of the sealing flange is equal to the diameter of the opening.

[0012] Furthermore, the furnace body has an installation ring groove for installing a sealing gasket, and the upper surface of the sealing gasket is higher than the surface of the furnace body.

[0013] Furthermore, a second driving component is fixedly mounted on the fixing component, and a gear that meshes with the gear ring is coaxially sleeved on the power output shaft of the second driving component.

[0014] Furthermore, the vertical cross-sections of both the limiting ring groove and the limiting ring are trapezoidal.

[0015] The beneficial effects of this utility model are:

[0016] 1. By setting the limiting ring groove and the limiting ring, the movement of the toothed ring in the vertical direction can be restricted, ensuring that while the toothed ring can rotate, the locking force of the first limiting member on the second limiting member is maintained, thereby ensuring that the sealing gasket is always pressed by the cover body, thus ensuring the sealing effect of the cover body on the furnace body.

[0017] 2. By adjusting the component settings, the cover can move only in the vertical plane, avoiding horizontal rotation of the cover. This prevents friction between the cover and the furnace body, thereby reducing wear on the furnace body or the cover and further improving the sealing effect of the cover on the furnace body.

[0018] 3. By setting the mounting ring groove, under the pressure of the cover, the sealing gasket will undergo elastic deformation in the mounting ring groove. The mounting ring groove will generate a reaction force on the sealing gasket. The mounting ring groove can not only fix the installation position of the sealing gasket, but also increase the reaction force of the sealing gasket on the cover, thereby further improving the sealing effect of the cover on the furnace body. Attached Figure Description

[0019] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0020] Figure 1 This is an axonometric view of the present invention;

[0021] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0022] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a schematic diagram of the gear ring in this utility model;

[0024] The attached diagram is labeled as follows:

[0025] 1. Furnace body; 101. Opening; 102. Limiting annular groove; 103. Mounting annular groove;

[0026] 2. Cover; 3. Limiting ring; 4. Gear ring; 5. First limiting component; 6. Second limiting component;

[0027] 7. Fasteners; 701. Fixing plate; 702. Mounting plate;

[0028] 8. First driving component; 9. Sealing flange; 10. Sealing gasket; 11. Second driving component; 12. Gear. Detailed Implementation

[0029] like Figures 1-4 As shown, a gas carburizing furnace includes a furnace body 1 with an opening 101, a sealing gasket 10 disposed on the furnace body 1 and coaxially disposed with the opening 101, a cover 2 disposed above the opening 101 and abutting against the sealing gasket 10 to seal the opening 101, and an adjustment assembly disposed on the furnace body 1 to drive the cover 2 to move in the vertical direction. The diameter of the cover 2 is larger than the diameter of the opening 101.

[0030] A limiting ring groove 102 is provided on the furnace body 1, which is coaxially arranged with the opening 101. A limiting ring 3 is provided in the limiting ring groove 102. A toothed ring 4 is provided on the furnace body 1, which is coaxially arranged with the limiting ring 3, and the toothed ring 4 is fixedly installed on the limiting ring 3. A first limiting member 5 is provided on the inner side wall of the toothed ring 4, and a second limiting member 6 is provided on the side wall of the cover 2. The lower surface of the second limiting member 6 is located on the same horizontal plane as the lower surface of the cover 2. The side of the first limiting member 5 near the furnace body 1 can abut against the side of the second limiting member 6 away from the furnace body 1.

[0031] To meet the processing requirements of workpieces of different sizes and quantities, the effective working diameter of the pit-type gas carburizing furnace ranges from Φ600mm to Φ3000mm, while the effective working depth is typically between 1000mm and 3000mm. In this application, the effective working diameter of the furnace body 1 is Φ1000mm, the effective working depth is 2500mm, the diameter of the opening 101 is 500mm, and the diameter of the cover 2 is 700mm, ensuring that the cover 2 can completely cover and seal the opening 101 of the furnace body 1.

[0032] The vertical cross-sectional shapes of the limiting ring groove 102 and the limiting ring 3 are identical, ensuring that the width at the notch of the limiting ring groove 102 is less than the width at the bottom of the limiting ring groove 102. Here, the vertical cross-sections of both the limiting ring groove 102 and the limiting ring 3 are trapezoidal, and the height of the limiting ring 3 is greater than the depth of the limiting ring groove 102. This design allows the gear ring 4 to be fixedly mounted on the limiting ring 3, ensuring that while the gear ring 4 can rotate, the locking force of the first limiting member 5 on the second limiting member 6 is maintained.

[0033] When it is necessary to seal the furnace body 1, the cover 2 is lowered by adjusting the components until the cover 2 abuts against the sealing gasket 10 and presses the sealing gasket 10 tightly. The sealing gasket 10 has a certain elasticity and can generate a reaction force on the cover 2 to complete the initial seal. At this time, the lower surface of the second limiting member 6 abuts against the upper edge of the furnace body 1. Gradually rotate the toothed ring 4 so that the lower surface of the first limiting member 5 abuts against the upper surface of the second limiting member 6, so that the sealing gasket 10 is always in a pressed state, ensuring the sealing effect of the sealing gasket 10, thereby ensuring the sealing effect of the furnace body 1, and at the same time avoiding friction between the cover 2 and the furnace body 1, which would cause the sealing effect of the furnace body 1 to deteriorate.

[0034] Furthermore, such as Figure 1 and Figure 2 As shown, the adjustment assembly includes a fixing member 7 fixedly installed on the side wall of the furnace body 1 and a first drive member 8 fixedly installed on the fixing member 7, and the power output shaft of the first drive member 8 passes through the fixing member 7, and the cover 2 is fixedly installed on the power output shaft of the first drive member 8.

[0035] The fixing component 7 includes a fixing plate 701 and a mounting plate 702. The fixing plate 701 is vertically arranged, and its lower side is fixedly mounted on the side wall of the furnace body 1. The mounting plate 702 is horizontally arranged directly above the opening 101, and its left end is fixedly mounted on the upper side of the fixing plate 701. Here, the first driving component 8 is a hydraulic cylinder. The first driving component 8 is vertically fixedly mounted on the upper surface of the mounting plate 702, and the power output shaft of the first driving component 8 passes through the mounting plate 702. The cover 2 is fixedly mounted on the power output shaft of the first driving component 8. The first driving component 8 can be one, two, three, four, etc., but two are preferred here. By adjusting the arrangement of the components, the cover 2 can only move in the vertical plane, avoiding horizontal rotation of the cover, thereby avoiding friction between the cover 2 and the furnace body 1, reducing wear on the furnace body 1 or the cover 2, and further improving the sealing effect of the cover 2 on the furnace body 1.

[0036] Furthermore, such as Figure 1 and Figure 2 As shown, a sealing flange 9 is coaxially fixedly installed on the surface of the cover 2 near the furnace body 1, and the diameter of the sealing flange 9 is equal to the diameter of the opening 101.

[0037] The sealing flange 9 can extend into the furnace body 1, and the diameter of the sealing flange 9 is equal to the diameter of the opening 101, which can further improve the sealing effect of the furnace body 1. The sealing flange 9 maintains the necessary positive pressure inside the furnace by ensuring the strict airtightness of the furnace chamber, protects the purity and stability of the carburizing atmosphere, prevents the leakage of harmful gases, ensures the uniformity of furnace temperature, and protects the internal components of the furnace.

[0038] Furthermore, such as Figure 2 and Figure 3 As shown, the furnace body 1 has an installation ring groove 103 for installing the sealing gasket 10, and the upper surface of the sealing gasket 10 is higher than the surface of the furnace body 1.

[0039] The mounting groove 103 is positioned between the opening 101 of the furnace body 1 and the toothed ring 4. Here, the sealing gasket 10 is a flexible graphite packing, which uses high-purity expanded graphite (also known as flexible graphite) as the base material. Through chemical or high-temperature treatment, natural graphite flakes are expanded into a worm-like porous structure, and then rolled into graphite foil. The flexible graphite packing has good high-temperature resistance, self-lubrication, and compression resilience. When the cover 2 is sealed, it is tightly pressed against the sealing gasket 10. At this time, the sealing gasket 10 undergoes elastic deformation in the mounting groove 103, and the mounting groove 103 will generate a reaction force on the sealing gasket 10. The mounting groove 103 can not only fix the installation position of the sealing gasket 10, but also increase the reaction force of the sealing gasket 10 on the cover 1, thereby further improving the sealing effect of the cover 2 on the furnace body 1.

[0040] Furthermore, such as Figure 1 and Figure 2As shown, a second driving component 11 is fixedly installed on the fixing component 7, and a gear 12 that meshes with the gear ring 4 is coaxially sleeved on the power output shaft of the second driving component 11.

[0041] The second drive component 11 here is a servo motor. The second drive component 11 is fixedly installed on the lower side of the mounting plate 702. The gear 12, which is coaxially sleeved on the power output shaft of the second drive component 11, can precisely drive the gear ring 4 to rotate, thereby locking the cover 2 and sealing the furnace body 1.

[0042] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A gas carburizing furnace, characterized in that: It includes a furnace body (1) with an opening (101), a sealing gasket (10) disposed on the furnace body (1) and coaxially disposed with the opening (101), a cover (2) disposed above the opening (101) and abutting against the sealing gasket (10) to seal the opening (101), and an adjustment component disposed on the furnace body (1) to drive the cover (2) to move in the vertical direction. The diameter of the cover (2) is larger than the diameter of the opening (101). A limiting ring groove (102) is provided on the furnace body (1) and is coaxially arranged with the opening (101). A limiting ring (3) is provided in the limiting ring groove (102). A toothed ring (4) is provided on the furnace body (1) and is coaxially arranged with the limiting ring (3). The toothed ring (4) is fixedly installed on the limiting ring (3). A first limiting member (5) is provided on the inner side wall of the toothed ring (4). A second limiting member (6) is provided on the side wall of the cover (2). The lower surface of the second limiting member (6) and the lower surface of the cover (2) are located on the same horizontal plane. The side of the first limiting member (5) close to the furnace body (1) can abut against the side of the second limiting member (6) away from the furnace body (1).

2. The gas carburizing furnace according to claim 1, characterized in that: The adjustment assembly includes a fixing member (7) fixedly installed on the side wall of the furnace body (1) and a first drive member (8) fixedly installed on the fixing member (7), and the power output shaft of the first drive member (8) passes through the fixing member (7), and the cover (2) is fixedly installed on the power output shaft of the first drive member (8).

3. A gas carburizing furnace according to claim 1 or 2, characterized in that: A sealing flange (9) is coaxially fixed on the surface of the cover (2) near the furnace body (1), and the diameter of the sealing flange (9) is equal to the diameter of the opening (101).

4. A gas carburizing furnace according to claim 1 or 2, characterized in that: The furnace body (1) has an installation ring groove (103) for installing a sealing gasket (10), and the upper surface of the sealing gasket (10) is higher than the surface of the furnace body (1).

5. A gas carburizing furnace according to claim 3, characterized in that: The furnace body (1) has an installation ring groove (103) for installing a sealing gasket (10), and the upper surface of the sealing gasket (10) is higher than the surface of the furnace body (1).

6. A gas carburizing furnace according to claim 1, 2, or 5, characterized in that: A second drive member (11) is fixedly installed on the fixing member (7), and a gear (12) that meshes with the gear ring (4) is coaxially sleeved on the power output shaft of the second drive member (11).

7. A gas carburizing furnace according to claim 3, characterized in that: A second drive member (11) is fixedly installed on the fixing member (7), and a gear (12) that meshes with the gear ring (4) is coaxially sleeved on the power output shaft of the second drive member (11).

8. A gas carburizing furnace according to claim 4, characterized in that: A second drive member (11) is fixedly installed on the fixing member (7), and a gear (12) that meshes with the gear ring (4) is coaxially sleeved on the power output shaft of the second drive member (11).

9. A gas carburizing furnace according to claim 1, 2, 5, 7 or 8, characterized in that: The vertical cross-sections of the limiting ring groove (102) and the limiting ring (3) are both trapezoidal.

Images