Sealing structure of heating pipe and shell

Abstract

The utility model discloses a heating pipe and shell sealing structure, which comprises a heating pipe body and a shell body, the shell body is detachably connected with a sealing cap, the sealing cap comprises a cap side wall and a cap top plate, a deformation fixing sheet and a sealing gasket are embedded in the sealing cap, the sealing gasket is arranged between the cap top plate and the shell body, and the deformation fixing sheet is connected with the sealing gasket. The deformation fixing piece is arranged between the sealing gasket and the cap top plate, the heating pipe installation hole sequentially penetrates through the shell body, the sealing gasket, the deformation fixing piece and the cap top plate, the heating pipe body penetrates in or out of the heating pipe installation hole, an axial limiting groove is formed in the outer side face of the heating pipe body, and the sealing gasket is arranged in the axial limiting groove. Tooth pieces clamped into the axial limiting grooves are distributed on the periphery of the inner side face of the deformation fixing piece. The sealing structure has the advantages of being easy to assemble, good in sealing effect, complete in overall function and high in practicability.

Description

Technical Field

[0001] This utility model relates to the field of electric heater technology, and more specifically, to a sealing structure between a heating tube and a housing. Background Technology

[0002] Existing methods for sealing the assembly of underwater heating pipes and equipment mainly include brazing, welding, and flange and ring compression sealing. Brazing and welding require high energy consumption, and flange and ring compression sealing is relatively complicated to assemble; if the flange compression is not done properly, the sealing effect is poor, resulting in an unsatisfactory overall performance. Therefore, this invention proposes a sealing structure between the heating pipe and the outer shell. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a sealing structure between the heating tube and the outer shell, which has the characteristics of simple assembly and good sealing effect.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: The present utility model relates to a sealing structure for a heating tube and a shell, including a heating tube body and a shell body. A sealing cap is detachably connected to the shell body. The sealing cap includes a cap side panel and a cap top plate. A deformable fixing piece and a sealing gasket are embedded in the sealing cap. The sealing gasket is located between the cap top plate and the shell body. The deformable fixing piece is located between the sealing gasket and the cap top plate. The present utility model also includes a heating tube mounting hole that passes through the shell body, the sealing gasket, the deformable fixing piece and the cap top plate in sequence. The heating tube body passes through or exits from the heating tube mounting hole. An axial limiting groove is provided on the outer side of the heating tube body. A toothed piece that engages with the axial limiting groove is distributed around the inner side of the deformable fixing piece.

[0005] The present invention is further configured such that: the outer shell body is provided with a first annular groove for partial insertion of the cap sidewall, the inner wall of the first annular groove is provided with a second annular groove, the inner side of the cap sidewall is provided with a locking hook that engages with the second annular groove, and the end of the locking hook facing the bottom of the first annular groove and / or the end of the inner wall of the first annular groove near the groove opening is provided with a guide structure.

[0006] The present invention is further configured such that: a protective tube is provided between the heating tube body and the outer shell body, and the protective tube is provided in the heating tube mounting hole, the protective tube is sleeved on the heating tube body, and the protective tube is connected to the sealing gasket.

[0007] The present invention is further configured such that the protective tube and the sealing gasket are an integral structure.

[0008] The present invention is further configured such that both the protective tube and the sealing gasket are made of rubber.

[0009] The present invention is further configured such that the width of the second annular groove is greater than the height of the locking hook.

[0010] The present invention is further configured such that: the internal space of the sealing cap is frustum-shaped, and the sealing gasket is adapted to be embedded in the sealing cap.

[0011] In summary, this utility model has the following beneficial effects:

[0012] 1. Compared with traditional brazing and welding sealing methods, the sealing method of this technical solution is more energy-efficient and environmentally friendly.

[0013] 2. Compared with the traditional sealing method using flanges and rubber gaskets, the sealing method of this technical solution is simpler to assemble, and the deformation of the rubber gasket is stable, resulting in better sealing stability.

[0014] 3. A protective tube is installed between the outer casing and the heating tube to prevent damage to the outer casing and the heating tube surface due to friction.

[0015] 4. The deformable fixing plate can effectively limit the axial movement of the heating tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is an exploded structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram illustrating the structure of the deformation fixing piece of this utility model. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the patent claims of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0020] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0021] Example 1

[0022] See Figures 1 to 3As shown, the sealing structure of the heating tube and the outer shell involved in this embodiment includes a heating tube body 1 and an outer shell body 2. A sealing cap 3 is detachably connected to the outer shell body 2. The sealing cap 3 includes a cap side circumference 301 and a cap top plate 302. A deformable fixing piece 4 and a sealing gasket 5 are embedded in the sealing cap 3. The sealing gasket 5 is located between the cap top plate 302 and the outer shell body 2. The deformable fixing piece 4 is located between the sealing gasket 5 and the cap top plate 302. It also includes a heating tube mounting hole 6 that passes through the outer shell body 2, the sealing gasket 5, the deformable fixing piece 4 and the cap top plate 302 in sequence. The heating tube body 1 passes through or exits from the heating tube mounting hole 6. An axial limiting groove 101 is provided on the outer side of the heating tube body 1. A toothed piece 401 that engages with the axial limiting groove is distributed around the inner side of the deformable fixing piece 4.

[0023] Furthermore, the outer shell body 2 is provided with a first annular groove 201 for partial insertion of the cap side panel 301, and a second annular groove 202 is provided on the inner wall of the first annular groove 201. The inner side of the cap side panel 301 is provided with a locking hook 303 that engages with the second annular groove. The end of the locking hook 303 facing the bottom of the first annular groove and the end of the inner wall of the first annular groove 201 near the groove opening are provided with a guide structure 7.

[0024] In this embodiment, a deformable fixing piece 4 is provided between the sealing cap 3 and the sealing gasket 5. The deformable fixing piece 4 is deformed by the pressure of the cap top plate 302 and the sealing gasket 5, which restricts the axial movement of the heating tube body 1. The sealing cap 3 and the outer shell body 2 are connected by a snap-fit ​​connection, which makes assembly quick.

[0025] The second annular groove 202, in conjunction with the locking hook 303, enables the locking connection between the sealing cap 3 and the outer shell body 2.

[0026] The axial limiting groove 101, in conjunction with the toothed piece 401 that is inserted into the groove, serves to limit the axial movement of the heating tube body 1 after installation.

[0027] Example 2

[0028] See Figures 1 to 3 As shown, the sealing structure of the heating tube and the outer shell involved in this embodiment is further configured based on embodiment 1, wherein a protective tube 501 is provided between the heating tube body 1 and the outer shell body 2 and is provided in the heating tube mounting hole, the protective tube 501 is sleeved on the heating tube body 1, and the protective tube 501 is connected to the sealing gasket 5.

[0029] Furthermore, the protective tube 501 and the sealing gasket 5 are an integral structure.

[0030] Furthermore, both the protective tube 501 and the sealing gasket 5 are made of rubber.

[0031] In this embodiment, the protective tube 501 serves to isolate the heating tube body 1 from direct contact with the outer casing body 2, preventing damage to the surface of the heating tube body 1 due to friction between the outer casing body 2 and the heating tube body 1. Since the surface of the heating tube is prone to corrosion, it also enhances the sealing performance.

[0032] Example 3

[0033] See Figures 1 to 3 As shown, the sealing structure between the heating tube and the outer shell involved in this embodiment is further configured, based on embodiment 1, such that the width of the second annular groove 302 is greater than the height of the locking hook 303.

[0034] In this embodiment, by setting the width of the second annular groove 302 to be greater than the height of the locking hook 303, a gap is left between the sealing cap 3 and the outer shell body 2 so that one end can move axially. When the sealing gasket 5 expands due to heat, there is space to release, thereby reducing the pressure on the sealing cap 3.

[0035] Example 4

[0036] See Figures 1 to 3 As shown, the sealing structure of the heating tube and the outer shell involved in this embodiment is further configured based on embodiment 1, wherein the internal space of the sealing cap 3 is frustum-shaped, and the sealing gasket 5 is adapted to be embedded in the sealing cap 3.

[0037] In this embodiment, by setting the internal space of the sealing cap 3 to a frustum-shaped structure and fitting the sealing gasket 5 into the sealing cap 3, assembly between components can be facilitated, and the fixing strength of the sealing cap 3 can also be enhanced.

[0038] The sealing structure between the heating tube and the outer shell involved in this utility model is more energy-efficient and environmentally friendly than traditional brazing and welding sealing methods. Compared with the traditional sealing method using flanges and rubber gaskets, the sealing method of this utility model is simpler to assemble, and the deformation of the rubber gasket is stable, resulting in better sealing stability. By setting a protective tube between the outer shell and the heating tube and sleeved on the heating tube, damage to the heating tube surface caused by friction between the outer shell and the heating tube is avoided. Furthermore, the deformation fixing piece can effectively limit the axial movement of the heating tube. The overall function is complete and highly practical.

[0039] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0040] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A sealing structure for a heating element and a housing, comprising a heating element body and a housing body, characterized in that: A sealing cap is detachably connected to the outer shell body. The sealing cap includes a cap side panel and a cap top plate. The sealing cap has a deformable fixing piece and a sealing gasket embedded in it. The sealing gasket is located between the cap top plate and the outer shell body. The deformable fixing piece is located between the sealing gasket and the cap top plate. It also includes a heating tube mounting hole that passes through the outer shell body, the sealing gasket, the deformable fixing piece and the cap top plate in sequence. The heating tube body passes through or out of the heating tube mounting hole. The outer side of the heating tube body is provided with an axial limiting groove. The inner side of the deformable fixing piece is surrounded by toothed pieces that fit into the axial limiting groove.

2. The sealing structure between the heating tube and the outer shell according to claim 1, characterized in that: The outer shell body is provided with a first annular groove for partial insertion of the cap side panel. The inner wall of the first annular groove is provided with a second annular groove. The inner side of the cap side panel is provided with a locking hook that engages with the second annular groove. The end of the locking hook facing the bottom of the first annular groove and / or the end of the inner wall of the first annular groove near the groove opening is provided with a guide structure.

3. The sealing structure between the heating tube and the outer shell according to claim 1 or 2, characterized in that: A protective tube is provided between the heating tube body and the outer shell body, and is located inside the heating tube mounting hole. The protective tube is sleeved on the heating tube body and is connected to the sealing gasket.

4. The sealing structure between the heating tube and the outer shell according to claim 3, characterized in that: The protective tube and the sealing gasket are an integral structure.

5. The sealing structure between the heating tube and the outer shell according to claim 4, characterized in that: Both the protective tube and the sealing gasket are made of rubber.

6. The sealing structure between the heating tube and the outer shell according to claim 2, characterized in that: The width of the second annular groove is greater than the height of the locking hook.

7. The sealing structure between the heating tube and the outer shell according to claim 1, characterized in that: The internal space of the sealing cap is truncated cone-shaped, and the sealing gasket is fitted and embedded inside the sealing cap.

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