CN-121297438-B - Heating pipe sealing mechanism, vacuum oven and vacuum parallel seam welder

CN121297438BCN 121297438 BCN121297438 BCN 121297438BCN-121297438-B

Abstract

The invention relates to a heating pipe sealing mechanism, a vacuum oven and a vacuum parallel seam welder, which belong to the technical field of oven sealing, wherein the heating pipe sealing mechanism comprises a fixed seat, a first through hole connected with a shell and provided with a second through hole, a sealing part arranged between a heating pipe and the second through hole, and a pressing part used for pressing the sealing part on the fixed seat, wherein the sealing part comprises a first sealing part and a second sealing part, the longitudinal section of the first sealing part is of a V-shaped structure, the pressing part is provided with an annular bulge with a V-shaped longitudinal section, the V-shaped angle of the annular bulge is larger than the V-shaped angle of the first sealing part, the second sealing part is abutted against the first sealing part, a wedge-shaped space is formed between the second through hole and the heating pipe, and the shape of the second sealing part is matched with the wedge-shaped space. According to the invention, through innovation of the structures of the sealing part and the pressing part, the axial pressing force of the pressing part can be converted into radial extrusion of the sealing part, and strong radial holding force and biting force are generated between the heating pipe and the fixing seat, so that the sealing effect is excellent.

Inventors

CHEN YUN
JIN WEIGANG
SU XIAOFENG
ZOU JUN
XIN PINGSHE
XIAO KUNLONG
LI YANG

Assignees

烟台华创智能装备有限公司

Dates

Publication Date: 20260508
Application Date: 20251210

Claims (8)

1. A heating pipe sealing mechanism which is used for a vacuum oven, wherein a shell (1) of the oven is provided with a first through hole, and is characterized in that, Comprising the following steps: the fixing seat (5) is connected with the first through hole of the shell (1) and is provided with a second through hole (53) for the heating pipe (4) to pass through; A sealing part (6) sleeved on the heating pipe (4) and arranged between the heating pipe (4) and the inner wall of the second through hole (53); The pressing part (7) is sleeved on the heating pipe (4) and is used for pressing the sealing part (6) on the fixing seat (5); The sealing part (6) comprises a first sealing piece (61) and a second sealing piece (62), wherein the longitudinal section of the first sealing piece (61) is of a V-shaped structure with a preset thickness, the pressing part (7) is provided with an annular bulge (72) with a V-shaped longitudinal section, the V-shaped angle alpha of the annular bulge (72) is larger than the V-shaped angle beta of the first sealing piece (61), the second sealing piece (62) is sleeved on the heating pipe (4) and abuts against the bottom of the first sealing piece (61), a wedge-shaped space is formed between the second through hole (53) and the heating pipe (4), and the shape of the second sealing piece (62) is matched with the wedge-shaped space; the V-shaped structure of the first sealing element (61) comprises a first V-shaped surface (611) and a second V-shaped surface (612), an inner wall structure (613) and an outer wall structure (614) of the first sealing element (61) are formed between the first V-shaped surface and the second V-shaped surface, the inner wall structure (613) is attached to the outer wall of the heating pipe (4) to form a first sealing surface, and the outer side surface of the second V-shaped surface (612) is meshed with the edge of the inlet end of the second through hole (53) to form a second sealing surface.
2. A heating tube sealing mechanism as set forth in claim 1, wherein, The top of the first V-shaped surface (611) is configured as an arcuate transition structure.
3. A heating tube sealing mechanism as set forth in claim 1, wherein, The thickness of the first sealing piece (61) is 1-2mm.
4. A heating tube sealing mechanism as set forth in claim 1, wherein, The first sealing member (61) is made of a high-temperature-resistant elastic metal material.
5. A heating tube sealing mechanism as set forth in claim 1, wherein, The pressing part (7) is locked and fixed on the fixed seat (5) through a locking piece (8).
6. A heating tube sealing mechanism as set forth in claim 1, wherein, The second through hole (53) has an inlet end inner diameter larger than an outlet end inner diameter, and forms a reducing structure for accommodating the sealing portion (6).
7. A vacuum oven, which comprises a working cavity formed by enclosing a shell (1), a heating plate (3) arranged in the working cavity, and a heating pipe (4) for providing a heat source for the heating plate (3), The heating tube (4) is mounted on the housing (1) by a heating tube sealing mechanism according to any one of claims 1 to 6.
8. A vacuum parallel seam welder is characterized in that, The vacuum oven comprises a vacuum chamber and the vacuum oven according to claim 7, wherein the vacuum oven is fixedly connected to two sides of the vacuum chamber.

Description

Heating pipe sealing mechanism, vacuum oven and vacuum parallel seam welder Technical Field The invention relates to the technical field of oven sealing, in particular to a heating pipe sealing mechanism, a vacuum oven and a vacuum parallel seam welder. Background The vacuum oven is box type equipment for heating and drying materials in a negative pressure environment, is widely applied to the fields of electronics, chemical industry, material science and the like, and can realize closed transmission and treatment of the materials especially when being matched with a glove box. The interior of the vacuum oven is provided with a heating plate for carrying materials, and the electric heating mode is generally adopted, and the heat conduction is realized through a heating pipe embedded in the heating plate. However, the heating tube is led out through the opening in the oven housing, which results in a greater difficulty in sealing. The traditional sealing scheme mostly adopts organic sealing elements such as rubber or polytetrafluoroethylene, but because the heating pipe can generate high-temperature radiation in the working process, the surface temperature of the heating pipe can reach 200 ℃, and the organic sealing elements such as rubber are easy to age, harden and even melt and lose efficacy in a long-term high-temperature environment, thereby causing vacuum leakage. Such leakage not only affects drying efficiency and product quality, but also may cause air or water vapor to enter the box, resulting in oxidative rejection of the product. In addition, frequent leak maintenance also increases equipment maintenance costs. Therefore, a sealing mechanism with high temperature resistance, long service life and excellent sealing effect is needed to improve the overall performance and economy of the vacuum oven. Disclosure of Invention The invention aims to provide a heating pipe sealing mechanism, a vacuum oven and a vacuum parallel seam welder, which can solve the technical problem of poor sealing between a heating pipe and the oven in the background art. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention provides a heating pipe sealing mechanism, which is used for a vacuum oven, wherein a shell of the oven is provided with a first through hole, the heating pipe sealing mechanism comprises a fixing seat, a sealing part and a pressing part, the fixing seat is connected with the first through hole of the shell and is provided with a second through hole for a heating pipe to pass through, the sealing part is sleeved on the heating pipe and is arranged between the heating pipe and the inner wall of the second through hole, the pressing part is sleeved on the heating pipe and is used for pressing the sealing part on the fixing seat, the sealing part comprises a first sealing piece and a second sealing piece, the longitudinal section of the first sealing piece is configured into a V-shaped structure with a preset thickness, the pressing part is provided with an annular bulge with a V-shaped longitudinal section, the V-shaped angle alpha of the annular bulge is larger than the V-shaped angle beta of the first sealing piece, the second sealing piece is sleeved on the heating pipe and is abutted against the bottom of the first sealing piece, a wedge-shaped space is formed between the second through hole and the heating pipe, and the shape of the second sealing piece is matched with the wedge-shaped space. In the scheme, when the pressing part is pressed, the annular raised inclined surface presses the first sealing element, sealing can be formed between the outer wall of the heating pipe and the inner wall of the second through hole, and the second sealing element is arranged to be capable of receiving and dispersing part of axial acting force from the first sealing element and converting the axial acting force into displacement trend of the axial acting force towards the small end of the wedge-shaped space, so that radial holding force on the heating pipe is generated, the sealing effect is further enhanced, meanwhile, the deformation amplitude and stress level of the bottom area of the first sealing element can be reduced through the support of the second sealing element, and the uniformity and stability of the contact pressure between the second sealing surface of the first sealing element and the fixing seat are ensured. In a preferred embodiment, the V-shaped structure of the first sealing member includes a first V-shaped surface and a second V-shaped surface, between which an inner wall structure and an outer wall structure of the first sealing member are formed, the inner wall structure is attached to the outer wall of the heating pipe to form a first sealing surface, and the outer side surface of the second V-shaped surface is engaged with the edge of the inlet end of the second through hole to form a second sealing surface. In a preferred embod