Tubular electric furnace sealing structure

Abstract

The utility model relates to the technical field of tubular electric furnaces, and discloses a sealing structure of a tubular electric furnace. The tubular electric furnace sealing structure comprises a shell, a limiting ring is fixedly installed on the front side of the shell, a rubber pad is fixedly installed on the inner side of the limiting ring, a sealing ring is installed at the top end of the shell in an embedded mode, and a top cover is movably installed above the shell. When the bottom end of the top cover makes contact with the top end of the shell, the relative position between the top cover and the shell is limited through the limiting frame, a threaded structure embedded with the limiting bolt is arranged in a horizontal structure below the limiting frame, and when the limiting bolt is tightened, pressure can be applied to the top cover and a protruding structure on the left side of the shell; meanwhile, when the nut is screwed down, the connecting ring can apply pressure to the shell and the top cover through the limiting ring, in this way, the relative pressure between the sealing ring and the sealing gasket can be increased, the sealing ring can extrude the sealing gasket, and therefore a gap between the contact faces of the shell and the top cover is closed.

Description

Technical Field

[0001] The utility model relates to the technical field of tubular electric furnaces, in particular to a tubular electric furnace sealing structure. Background Art

[0002] The function of a tube furnace is to heat the heating medium flowing in the internal pipe so that it can transfer heat to the object in the outer shell, thereby heating the object to the required temperature to meet the requirements of the production process.

[0003] The existing referenceable Chinese utility model patent with announcement number: CN215217126U discloses a tubular electric furnace, including a furnace shell, an upper frame, an outer furnace door, a control box, a control panel, a lower frame and an inner furnace. The furnace shell is a hollow rectangular structure, an inner furnace is arranged inside the furnace shell, the top of the furnace shell is fixedly connected to the upper frame, a control box is arranged at the bottom of the furnace shell, a control panel is arranged on one side of the control box, and the control panel is electrically connected to the control box, and the bottom of the control box is fixedly connected to the lower frame. The tubular electric furnace described in the utility model has a simple structure and a reasonable design. The maximum temperature of the tubular electric furnace can reach 1800 degrees, which is suitable for heating materials such as powders, and is suitable for firing ceramic materials. The control panel and its internal circuit control can facilitate the staff to control the temperature in the inner furnace. The operation is convenient, economical and practical, and easy to promote.

[0004] The center of the existing tubular circuit is a hollow quartz tube. There is no sealing structure between the outer shell and the quartz tube. The internal heat will diffuse to the outside from the gap between the quartz tube and the outer shell, affecting the temperature inside the furnace. At the same time, since the outer shell and the top cover are generally fixed by a buckle on one side, the two sides of the sealing structure between the outer shell and the top cover cannot withstand high pressure, resulting in poor sealing effect. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a tubular electric furnace sealing structure, which has the advantages of being able to improve the sealing effect between the outer shell and the quartz tube and being able to increase the pressure on the sealing structure between the outer shell and the top cover, thereby solving the above technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tubular electric furnace sealing structure, comprising: a shell, a limiting ring is fixedly installed on the front side of the shell, a rubber pad is fixedly installed on the inner side of the limiting ring, a sealing ring is embedded and installed on the top of the shell, a top cover is movably installed on the upper side of the shell, a sealing pad is fixedly installed on the lower end of the top cover, a limiting frame is movably installed on the left side of the shell, a limiting bolt is inserted and installed on the upper side of the limiting frame, a hinge is fixedly installed on the right side of the shell, a connecting ring is movably installed on the outer side of the limiting ring, a connecting bolt is inserted and installed on the upper side of the connecting ring, a nut is movably installed on the lower end of the connecting bolt, a sealing rubber pad is fixedly installed on the inner side of the connecting ring, and a limiting rubber ring is embedded and installed on the inner side of the connecting ring; the rubber pad can easily fill the gap between the quartz tube and the limiting ring, the shell and the top cover.

[0009] As a preferred technical solution of the utility model, the top end of the shell and the lower end of the top cover are provided with a half-cylindrical recessed structure which is engaged with the quartz tube, and the limiting ring is installed at the front and rear ends of the shell and the front and rear ends of the top cover in a front-to-back symmetrical and upper-lower mirror-symmetrical manner with the center of the shell as a reference; the shell can limit the position of the top cover by a hinge.

[0010] As a preferred technical solution of the utility model, the inner diameter of the limiting ring is the same as the inner diameter of the shell recessed structure, and the rubber pad is fixedly installed above the shell recessed structure and the inner side of the limiting ring; the limiting ring can limit the position of the quartz tube.

[0011] As a preferred technical solution of the utility model, the sealing ring is installed on the top of the outer shell symmetrically with the center of the outer shell as a reference, and the sealing gasket is installed on the left and right sides of the bottom end of the top cover symmetrically with the center of the top cover as a reference; the sealing ring and the sealing gasket can fill the gap between the outer shell and the top cover.

[0012] As a preferred technical solution of the utility model, the top cover is rotatably connected to the outer shell through a hinge, a raised structure is provided on the left side of the top cover and the outer shell, the limit frame is a "concave" shaped structure, and the limit bolt vertically passes through the limit frame, the top cover, and the outer shell; the limit frame can easily limit the relative position between the outer shell and the top cover.

[0013] As a preferred technical solution of the utility model, the connecting ring is installed on the upper and lower sides of the limiting ring in a mirror-symmetrical manner with the top of the shell as a reference, and the connecting bolts are installed on the left and right sides of the connecting ring in a left-right symmetrical manner with the center of the connecting ring as a reference. The connecting rings are movably connected through connecting bolts and nuts; the connecting bolts and nuts can limit the relative position between the connecting rings.

[0014] As a preferred technical solution of the utility model, the inner wall of the connecting ring is a stepped structure, the rear inner diameter of the connecting ring matches the outer diameter of the limiting ring, and the front inner diameter of the connecting ring matches the inner diameter of the limiting ring; the connecting ring can easily limit the relative position between the top cover and the outer shell.

[0015] Compared with the prior art, the utility model provides a tubular electric furnace sealing structure having the following features:

[0016] Beneficial effects:

[0017] 1. The utility model sets a limiting ring, which is symmetrically mounted on the front and rear ends of the shell and the front and rear ends of the top cover with the center of the shell as the reference, and the inner diameter of the limiting ring is the same as the inner diameter of the recessed structure of the shell. The rubber pad is fixedly mounted above the recessed structure of the shell and the inner side of the limiting ring. The quartz tube is located inside the tubular structure enclosed by the limiting ring, and the outer side of the quartz tube is in contact with the rubber pad. The connecting ring is symmetrically mounted on the upper and lower sides of the limiting ring with the top of the shell as the reference, and the connecting bolt is fixedly mounted on the left side with the center of the connecting ring as the reference. The right side is symmetrically installed on the left and right sides of the connecting ring. At the same time, the inner wall of the connecting ring is a stepped structure. The inner diameter of the rear side of the connecting ring matches the outer diameter of the limiting ring, and the inner diameter of the front end of the connecting ring matches the inner diameter of the limiting ring. After tightening the nut, the nut and the connecting bolt will make the sealing pad on the inside of the connecting ring contact with the surface of the quartz tube, and make the limiting rubber ring contact with the connecting ring. In this way, the gap between the quartz tube and the outer shell and the top cover can be filled with the rubber pad, the sealing pad and the limiting rubber ring, thereby avoiding heat loss from the gap between the quartz tube and the outer shell and the top cover during heating.

[0018] 2. The utility model sets a limit frame, which is a "concave" shaped structure. A convex structure is set on the left side of the top cover and the outer shell. When the bottom end of the top cover contacts the top end of the outer shell, the relative position between the top cover and the outer shell is limited by the limit frame. Since the limit bolt vertically penetrates the limit frame, the top cover and the outer shell, a threaded structure engaged with the limit bolt is set inside the horizontal structure below the limit frame. When the limit bolt is tightened, pressure is applied to the convex structure on the left side of the top cover and the outer shell. At the same time, when the nut is tightened, the connecting ring can apply pressure to the outer shell and the top cover through the limit ring. This method can increase the relative pressure between the sealing ring and the sealing gasket, and the sealing ring will squeeze the sealing gasket, thereby closing the gap between the contact surface of the outer shell and the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the housing and the top cover of the utility model;

[0021] Figure 3This is a schematic diagram of the installation structure of the housing and the connecting ring of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection structure between the connection ring and the sealing rubber pad of the utility model;

[0023] Among them: 1. outer shell; 11. limiting ring; 12. rubber pad; 13. sealing ring; 14. top cover; 15. sealing pad; 16. limiting frame; 17. limiting bolt; 18. hinge; 2. connecting ring; 21. connecting bolt; 22. nut; 23. sealing rubber pad; 24. limiting rubber ring. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0025] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1 - Figure 4 In this embodiment, a tubular electric furnace sealing structure includes: a shell 1, a limit ring 11 is fixedly installed on the front side of the shell 1, a rubber pad 12 is fixedly installed on the inner side of the limit ring 11, a sealing ring 13 is embedded and installed on the top of the shell 1, a top cover 14 is movably installed on the top of the shell 1, a sealing gasket 15 is fixedly installed on the lower end of the top cover 14, a limit frame 16 is movably installed on the left side of the shell 1, a limit bolt 17 is inserted and installed on the top of the limit frame 16, and a hinge 18 is fixedly installed on the right side of the shell 1.

[0028] The top of the shell 1 and the lower end of the top cover 14 are provided with a half-cylindrical recess structure that fits with the quartz tube. The limit ring 11 is installed at the front and rear ends of the shell 1 and the front and rear ends of the top cover 14 symmetrically and mirror-symmetrically with the center of the shell 1 as the reference.

[0029] The inner diameter of the limiting ring 11 is the same as the inner diameter of the recessed structure of the housing 1 , and the rubber pad 12 is fixedly installed above the recessed structure of the housing 1 and the inner side surface of the limiting ring 11 .

[0030] The sealing ring 13 is installed on the top of the housing 1 symmetrically with respect to the center of the housing 1 , and the sealing gasket 15 is installed on the left and right sides of the bottom of the top cover 14 symmetrically with respect to the center of the top cover 14 .

[0031] The top cover 14 is rotatably connected to the outer shell 1 via a hinge 18 . A protruding structure is provided on the left side of the top cover 14 and the outer shell 1 . The limit frame 16 is a “concave” shaped structure. The limit bolt 17 vertically penetrates the limit frame 16 , the top cover 14 , and the outer shell 1 .

[0032] Specifically, the outer shell 1 can limit the position of the top cover 14 through the hinge 18, the limit ring 11 can limit the position of the quartz tube, the rubber pad 12 can facilitate filling the gap between the quartz tube and the limit ring 11, the outer shell 1, and the top cover 14, the sealing ring 13 and the sealing pad 15 can fill the gap between the outer shell 1 and the top cover 14, the top cover 14 can facilitate closing the upper end of the outer shell 1, the limit frame 16 can facilitate limiting the relative position between the outer shell 1 and the top cover 14, the limit bolt 17 can apply pressure to the outer shell 1 and the top cover 14, and the hinge 18 can facilitate the rotation of the top cover 14.

[0033] A connecting ring 2 is movably installed on the outer side of the limiting ring 11, a connecting bolt 21 is inserted and installed on the top of the connecting ring 2, a nut 22 is movably installed on the lower end of the connecting bolt 21, a sealing gasket 23 is fixedly installed on the inner side of the connecting ring 2, and a limiting rubber ring 24 is embedded and installed on the inner side of the connecting ring 2.

[0034] The connecting ring 2 is installed on the upper and lower sides of the limiting ring 11 in a mirror-symmetrical manner with the top of the shell 1 as the reference, and the connecting bolts 21 are installed on the left and right sides of the connecting ring 2 in a left-right symmetrical manner with the center of the connecting ring 2 as the reference. The connecting rings 2 are movably connected through the connecting bolts 21 and the nuts 22.

[0035] The inner wall of the connecting ring 2 is in a stepped structure. The inner diameter of the rear side of the connecting ring 2 matches the outer diameter of the limiting ring 11 , and the inner diameter of the front end of the connecting ring 2 matches the inner diameter of the limiting ring 11 .

[0036] Specifically, the connecting ring 2 can easily limit the relative position between the top cover 14 and the housing 1, the connecting bolts 21 and the nuts 22 can limit the relative position between the connecting rings 2, and the sealing rubber pad 23 and the limiting rubber ring 24 can play a sealing role.

[0037] When in use, the limiting ring 11 is installed at the front and rear ends of the shell 1 and the front and rear ends of the top cover 14 in a mirror-image manner with the center of the shell 1 as the reference, and the inner diameter of the limiting ring 11 is the same as the inner diameter of the recessed structure of the shell 1. The rubber pad 12 is fixedly installed above the recessed structure of the shell 1 and the inner side of the limiting ring 11. The quartz tube is located inside the tubular structure enclosed by the limiting ring 11, and the outer side of the quartz tube is in contact with the rubber pad 12. The connecting ring 2 is installed at the limiting ring 11 in a mirror-image manner with the top of the shell 1 as the reference. On the upper and lower sides of the ring 11, the connecting bolts 21 are symmetrically installed on the left and right sides of the connecting ring 2 with the center of the connecting ring 2 as the reference. At the same time, the inner wall of the connecting ring 2 is a stepped structure. The inner diameter of the rear side of the connecting ring 2 matches the outer diameter of the limiting ring 11, and the inner diameter of the front end of the connecting ring 2 matches the inner diameter of the limiting ring 11. After tightening the nut 22, the nut 22 and the connecting bolt 21 will make the sealing gasket 23 on the inner side of the connecting ring 2 contact with the surface of the quartz tube, and make the limiting rubber ring 24 contact with the connecting ring 2. This method can make the quartz The gap between the tube and the shell 1 and the top cover 14 is filled with a rubber pad 12, a sealing pad 23, and a limiting rubber ring 24, so as to prevent heat from being lost from the gap between the quartz tube and the shell 1 and the top cover 14 during heating. The limiting frame 16 is a "concave"-shaped structure, and a convex structure is provided on the left side of the top cover 14 and the shell 1. When the bottom end of the top cover 14 contacts the top end of the shell 1, the relative position between the top cover 14 and the shell 1 is limited by the limiting frame 16. Since the limiting bolt 17 vertically penetrates the limiting frame 16 and the top cover 1 4. The shell 1 and the horizontal structure below the limit frame 16 are internally provided with a threaded structure engaged with the limit bolt 17. When the limit bolt 17 is tightened, pressure is applied to the top cover 14 and the raised structure on the left side of the shell 1. At the same time, when the nut 22 is tightened, the connecting ring 2 can apply pressure to the shell 1 and the top cover 14 through the limit ring 11. This method can increase the relative pressure between the sealing ring 13 and the sealing gasket 15. The sealing ring 13 will squeeze the sealing gasket 15, thereby closing the gap between the contact surface of the shell 1 and the top cover 14.

[0038] 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 tubular electric furnace sealing structure, characterized in that: include: A housing (1), a limiting ring (11) is fixedly mounted on the front side of the housing (1), a rubber pad (12) is fixedly mounted on the inner side of the limiting ring (11), a sealing ring (13) is embedded and mounted on the top end of the housing (1), a top cover (14) is movably mounted on the top of the housing (1), a sealing pad (15) is fixedly mounted on the lower end of the top cover (14), a limiting frame (16) is movably mounted on the left side of the housing (1), and a rubber pad (12) is fixedly mounted on the upper side of the limiting frame (16). A limit bolt (17) is inserted and installed, a hinge (18) is fixedly installed on the right side of the shell (1), a connecting ring (2) is movably installed on the outer side of the limit ring (11), a connecting bolt (21) is inserted and installed on the top of the connecting ring (2), a nut (22) is movably installed on the lower end of the connecting bolt (21), a sealing gasket (23) is fixedly installed on the inner side of the connecting ring (2), and a limit rubber ring (24) is embedded and installed on the inner side of the connecting ring (2).

2. The sealing structure of a tubular electric furnace according to claim 1, characterized in that: The top end of the shell (1) and the bottom end of the top cover (14) are provided with a half-columnar recessed structure that engages with the quartz tube, and the limiting ring (11) is installed at the front and rear ends of the shell (1) and the front and rear ends of the top cover (14) in a mirror-symmetrical manner with the center of the shell (1) as a reference.

3. The sealing structure of a tubular electric furnace according to claim 1, characterized in that: The inner diameter of the limiting ring (11) is the same as the inner diameter of the recessed structure of the outer shell (1), and the rubber pad (12) is fixedly mounted above the recessed structure of the outer shell (1) and the inner side surface of the limiting ring (11).

4. The sealing structure of a tubular electric furnace according to claim 1, characterized in that: The sealing ring (13) is installed on the top of the outer shell (1) symmetrically with the center of the outer shell (1) as a reference, and the sealing gasket (15) is installed on the left and right sides of the bottom of the top cover (14) symmetrically with the center of the top cover (14) as a reference.

5. The sealing structure of a tubular electric furnace according to claim 1, characterized in that: The top cover (14) is rotatably connected to the outer shell (1) via a hinge (18); a protruding structure is provided on the left side of the top cover (14) and the outer shell (1); the limit frame (16) is a "concave"-shaped structure; and the limit bolt (17) vertically penetrates the limit frame (16), the top cover (14) and the outer shell (1).

6. The sealing structure of a tubular electric furnace according to claim 1, characterized in that: The connecting ring (2) is mounted on the upper and lower sides of the limiting ring (11) in a mirror-symmetrical manner with the top of the housing (1) as a reference, and the connecting bolts (21) are mounted on the left and right sides of the connecting ring (2) in a left-right symmetrical manner with the center of the connecting ring (2) as a reference. The connecting rings (2) are movably connected through the connecting bolts (21) and the nuts (22).

7. The sealing structure of a tubular electric furnace according to claim 1, characterized in that: The inner wall of the connecting ring (2) is in a stepped structure, the inner diameter of the rear side of the connecting ring (2) matches the outer diameter of the limiting ring (11), and the inner diameter of the front end of the connecting ring (2) matches the inner diameter of the limiting ring (11).

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