CN212046323U - Connecting device for negative pressure sealing - Google Patents
Connecting device for negative pressure sealing Download PDFInfo
- Publication number
- CN212046323U CN212046323U CN202020513428.7U CN202020513428U CN212046323U CN 212046323 U CN212046323 U CN 212046323U CN 202020513428 U CN202020513428 U CN 202020513428U CN 212046323 U CN212046323 U CN 212046323U
- Authority
- CN
- China
- Prior art keywords
- exhaust pipe
- negative pressure
- pipe seat
- change material
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
The utility model relates to a connecting device for negative pressure plate processing technology field, including exhaust pipe seat, blast pipe, phase change material piece, heating element and/or cooling pipeline, bleed-off line establishes on the exhaust pipe seat, the main aspects of the tube hole of exhaust pipe seat are located to the phase change material piece, heating element and/or cooling pipeline all locate in the exhaust pipe seat. The device of the utility model is simple in structure, long service life can realize the negative pressure between thin wall brittle material and seal under high temperature environment, and the blast pipe that can protect negative pressure panel can not stick up absolutely because of receiving the hindrance when shifting naturally, reaches high vacuum seal simultaneously, can be used to produce the very high negative pressure panel of negative pressure in batches with high yield.
Description
Technical Field
The utility model belongs to the technical field of the negative pressure panel processing, specifically, relate to a connecting device for negative pressure is sealed.
Background
The negative pressure plate is formed by sealing four sides of at least two plates, and an exhaust pipe is preset on at least one substrate forming the negative pressure plate. In the prior art, a negative pressure sealing method of a negative pressure plate generally adopts a mode of sealing a rubber ring, a tightened hoop and an annular sealing air bag, and convenient insertion and sealing connection can be realized in a pluggable manner. The elastic sealing is difficult to achieve high vacuum sealing, so that the negative pressure in the negative pressure plate is not high, and the performance is poor. In addition, the sealing rubber ring, the hoop, the air bag and the like are easy to age and lose efficacy and cannot be used in a high-temperature environment of 400 ℃.
The hard connection between the copper gasket and the flange knife edge is commonly used for sealing in high vacuum, but the hard connection is not suitable for negative pressure sealing between thin-wall brittle materials. When the thin-wall brittle material such as glass exhaust pipe is vibrated, it will break due to collision and cannot be used.
Therefore, there is a need for a connection device for negative pressure sealing between thin-walled brittle materials in a high temperature environment, so as to protect the exhaust pipe from breaking due to obstruction when the exhaust pipe naturally moves, and achieve high vacuum sealing, thereby being capable of mass production of negative pressure plates with high negative pressure at high yield.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a connecting device for negative pressure is sealed, including exhaust pipe seat, blast pipe, phase change material piece, heating element and/or cooling pipeline, bleed-off line establishes on the exhaust pipe seat, the main aspects of the tube hole of exhaust pipe seat are located to the phase change material piece, heating element and/or cooling pipeline all locate in the exhaust pipe seat. The heating element adopts the conventional technical means in the field, such as an electric heating wire, the heating element and/or the cooling pipeline are/is used for adjusting the temperature of the exhaust pipe seat, and the phase change temperature or the melting point of the phase change material block is lower than the phase change temperature or the melting point of the negative pressure plate and the exhaust pipe.
Preferably, the connecting device also comprises a bottom gasket with a central through hole, which is arranged in the pipe hole of the exhaust pipe seat, wherein the bottom gasket is arranged at the step part in the pipe hole of the exhaust pipe seat and adopts a thin-wall flexible gasket, so that the movement of the exhaust pipe is not hindered; the central through hole is matched with the outer diameter of the exhaust pipe. And if the wettability between the bottom gasket and the phase-change material is good, the phase-change material is adsorbed on the bottom gasket and can be used for adjusting the surface tension of the liquefied phase-change material block, and the phase-change temperature or melting point of the phase-change material block is lower than that of the bottom gasket.
Preferably, the negative pressure plate and the exhaust pipe are made of metal, ceramic, glass or plastic.
Preferably, the phase-change material block is made of metal, glass, ceramic, organic matter or inorganic salt, so that the solid state and the liquid state are mutually converted under the corresponding temperature condition, and the sealing effect and the sealing connection effect are realized.
Preferably, the infiltration angle between the liquefied phase-change material block and the exhaust pipe seat and between the liquefied phase-change material block and the exhaust pipe is not larger than 90 degrees, the surface tension action of the liquefied phase-change material block in the gap between the exhaust pipe seat and the exhaust pipe is larger than the gravity action, so that the liquefied phase-change material can be left in the exhaust pipe seat and does not flow out to form a hole, and therefore negative pressure sealing failure is prevented.
Preferably, when this connecting device locates negative pressure panel top, the top threaded connection of exhaust tube seat has the spiral cover, be equipped with corresponding flange edge on spiral cover and the exhaust tube seat, the pipeline connection of bleeding is in the spiral cover top, be equipped with sealed copper ring between the flange edge of spiral cover and exhaust tube seat, when the spiral cover was screwed, the sealed copper ring was all cut into to the flange edge of spiral cover and exhaust tube seat, formed the top and sealed, conveniently used under the occasion of difference.
The utility model discloses still including enabling this a connecting device for negative pressure is sealed other devices or the subassembly of normal use, be the conventional technical means in this field.
The utility model discloses an operating principle is, can realize solid-state and liquid quick change's characteristic under different temperatures according to phase change material, combines together its processing characteristics with negative pressure panel to through the connecting device according to phase change material characteristic design, realize the high-efficient negative pressure seal to between thin wall brittle material. The specific using method of the utility model comprises the following steps:
the method comprises the following steps that (1) an exhaust pipe of a negative pressure plate is placed in an exhaust pipe seat, a pipe hole with a large upper part and a small lower part is formed in the exhaust pipe seat, and the minimum inner diameter of the pipe hole is larger than the outer diameter of the exhaust pipe;
the method comprises the following steps that (2) a phase-change material block is arranged between an exhaust pipe seat and an exhaust pipe, and the minimum diameter of the phase-change material block is larger than the gap between a pipe hole of the exhaust pipe seat and the exhaust pipe;
step (3), placing the negative-pressure plate and the exhaust pipe seat in a heating furnace, and heating the heating furnace to a working temperature which is lower than a phase-change temperature or a melting point of the phase-change material block from a solid state to a liquid state; or heating the heating furnace to a temperature above the phase-change temperature or melting point of the phase-change material block converted from the solid state to the liquid state, and simultaneously cooling the exhaust pipe seat through the cooling pipeline and the cooling liquid in the pipeline to ensure that the temperatures of the exhaust pipe seat and the phase-change material block are lower than the phase-change temperature or melting point of the phase-change material block converted from the solid state to the liquid state, so that the phase-change material block is kept in the solid state;
step (4), the negative pressure plate naturally deforms in a thermal change environment to drive the exhaust pipe to freely move in the pipe hole of the exhaust pipe seat;
step (5), according to the furnace temperature condition of the heating furnace in the step (3), adjusting the temperature of the exhaust pipe seat, filling the gap between the exhaust pipe seat and the exhaust pipe with the liquefied phase-change material block under the action of gravity, and infiltrating the exhaust pipe seat and the exhaust pipe, wherein the surface tension action of the liquefied phase-change material block in the gap between the exhaust pipe seat and the exhaust pipe is greater than the gravity action, so that the liquefied phase-change material can be retained in the exhaust pipe seat and cannot flow out to form a hole, and the negative pressure sealing failure is prevented;
step (6), cooling the exhaust pipe seat to be below the phase change temperature or the melting point, and re-solidifying the liquefied phase change material, so that the exhaust pipe seat and the exhaust pipe are hermetically connected together to form negative pressure sealing;
step (7), exhausting air from the inner cavity of the negative-pressure plate through the exhaust pipe seat and the exhaust pipe;
and (8) sealing the exhaust pipe to finish the negative pressure sealing of the negative pressure plate.
The beneficial effects of the utility model are that, device simple structure, long service life can realize the negative pressure between thin wall brittle material and seal under high temperature environment, and the blast pipe that can protect negative pressure panel can not stick up absolutely because of receiving the hindrance when shifting naturally, reaches high vacuum seal simultaneously, can be used to produce the very high negative pressure panel of negative pressure in batches high yield ground.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention.
Fig. 2 is a partially enlarged schematic view of the structure of the G portion in fig. 1.
Fig. 3 is a schematic view of the overall structure of embodiment 2 of the present invention.
Fig. 4 is a partially enlarged schematic view of the H-section structure in fig. 3.
Detailed Description
The present invention will be described more clearly with reference to the accompanying drawings and specific embodiments in the embodiments of the present invention, and the description herein is only for explaining the present invention, but not for limiting the present invention. Based on the embodiments of the present invention, any modifications, equivalent replacements, improvements, etc. made by other embodiments obtained by those skilled in the art without creative efforts should be included in the protection scope of the present invention.
Example 1
As shown in fig. 1-2, the utility model provides a connecting device based on the negative pressure sealing method in embodiment 1, this connecting device includes exhaust pipe seat 4, blast pipe 1, phase-change material block 6, heating element 9 and cooling pipeline 8, exhaust pipeline 10 sets up on exhaust pipe seat 4, phase-change material block 6 locates the main aspects of pipe hole 5 of exhaust pipe seat 4, heating element 9 and cooling pipeline 8 all locate in exhaust pipe seat 4, heating element 9 locates above cooling pipeline 8, be equipped with bottom gasket 11 with central through-hole in pipe hole 5 of exhaust pipe seat 4, bottom gasket 11 locates the step portion in pipe hole 5 of exhaust pipe seat 4, and adopt the thin-walled flexible glass gasket that the melting point is 0.01 mm thick of 1100 ℃, do not hinder the removal of blast pipe 1; the central through hole is matched with the outer diameter of the exhaust pipe 1. The bottom gasket 11 and the phase-change material have good wettability, and the phase-change material is adsorbed on the bottom gasket 11 and can be used for adjusting the surface tension between gaps after the phase-change material block 6 is liquefied. The heating element 9 and the cooling line 8 are used for regulating the temperature of the exhaust pipe socket 4. The negative pressure plate 2 and the exhaust pipe 1 are made of glass with the melting point of 1100 ℃; the phase-change material block 6 is made of glass with a melting point of 380 ℃; the infiltration angles between the liquefied phase change material blocks 6 and the exhaust pipe seat 4 and between the liquefied phase change material blocks and the exhaust pipe 1 are smaller than 90 degrees; the exhaust pipe seat is made of stainless steel. The surface tension effect of the liquefied phase-change material block 6 in the gap between the exhaust pipe seat 4 and the exhaust pipe 1 is larger than the gravity effect, so that the liquefied phase-change material can be left in the exhaust pipe seat 4 and does not flow out to form a hole, and the negative pressure sealing failure is prevented.
Example 2
As shown in fig. 3-4, the utility model provides a connecting device for negative pressure sealing, this connecting device locates the top of negative pressure panel 2, and includes exhaust pipe seat 4, blast pipe 1, phase-change material piece 6, heating element 9 and cooling pipeline 8, air exhaust pipeline 10, the top threaded connection of exhaust pipe seat 4 has spiral cover 12, be equipped with corresponding flange edge 13 on spiral cover 12 and the exhaust pipe seat 4, air exhaust pipeline 10 is connected above spiral cover 12, be equipped with sealed copper ring 14 between the flange edge 13 of spiral cover 12 and exhaust pipe seat 4, when spiral cover 12 screwed, the flange edge 13 of spiral cover 12 and exhaust pipe seat 4 all cut into sealed copper ring 14, forms the top and seals; the phase-change material block 6 is arranged at the large end of a pipe hole 5 of the exhaust pipe seat 4, the heating element 9 and the cooling pipeline 8 are both arranged in the exhaust pipe seat 4, the heating element 9 is arranged above the cooling pipeline 8, a bottom gasket 11 with a central through hole is arranged in the pipe hole 5 of the exhaust pipe seat 4, the bottom gasket 11 is arranged at a step part in the pipe hole 5 of the exhaust pipe seat 4, and a thin-wall flexible glass gasket with a melting point of 1100 ℃ and a thickness of 0.01 mm is adopted, so that the movement of the exhaust pipe 1 is not hindered; the central through hole is matched with the outer diameter of the exhaust pipe 1, the bottom gasket 11 and the phase change material are good in wettability, and the phase change material is adsorbed on the bottom gasket 11 and can be used for adjusting the surface tension between gaps after the phase change material block 6 is liquefied; the heating element 9 and the cooling pipeline 8 are used for adjusting the temperature of the exhaust pipe seat 4; the negative pressure plate 2 and the exhaust pipe 1 are made of glass with the melting point of 1100 ℃; the phase-change material block 6 is made of glass with a melting point of 380 ℃; the infiltration angles between the liquefied phase change material blocks 6 and the exhaust pipe seat 4 and between the liquefied phase change material blocks and the exhaust pipe 1 are smaller than 90 degrees; the exhaust pipe seat is made of stainless steel. The surface tension effect of the liquefied phase-change material block 6 in the gap between the exhaust pipe seat 4 and the exhaust pipe 1 is larger than the gravity effect, so that the liquefied phase-change material can be left in the exhaust pipe seat 4 and does not flow out to form a hole, and the negative pressure sealing failure is prevented.
The utility model discloses an operating principle is, can realize solid-state and liquid quick change's characteristic under different temperatures according to phase change material, combines together its processing characteristics with negative pressure panel 2 to through the connecting device according to phase change material characteristic design, realize the high-efficient negative pressure seal to between thin wall brittle material.
The specific methods of use of example 1 and example 2 each include the steps of:
the method comprises the following steps that (1) an exhaust pipe 1 of a negative pressure plate 2 is placed in an exhaust pipe seat 4, a pipe hole 5 with a large upper part and a small lower part is formed in the exhaust pipe seat 4, and the minimum inner diameter of the pipe hole 5 is larger than the outer diameter of the exhaust pipe 1;
step (2), placing a solid phase-change material block 6 with a melting point of 380 ℃ between the exhaust pipe seat 4 and the exhaust pipe 1, wherein the minimum diameter of the phase-change material block 6 is larger than the gap between the pipe hole 5 of the exhaust pipe seat 4 and the exhaust pipe 1;
step (3), placing the negative-pressure plate 2 and the exhaust pipe seat 4 in a heating furnace 7, heating the heating furnace 7 to 400 ℃, and simultaneously cooling the exhaust pipe seat 4 through a cooling pipeline 8 and cooling liquid in the pipeline to keep the temperatures of the exhaust pipe seat 4 and the phase-change material block 6 at 360 ℃ so as to keep the phase-change material block 6 in a solid state;
step (4), the negative pressure plate 2 naturally deforms in a thermal change environment to drive the exhaust pipe 1 to freely move in the pipe hole 5 of the exhaust pipe seat 4;
step (5), the exhaust pipe seat 4 is stopped to be cooled, the temperature of the exhaust pipe seat 4 is recovered to 400 ℃, the phase-change material block 6 is heated to be liquefied from a solid state and flows, a gap between the exhaust pipe seat 4 and the exhaust pipe 1 is filled under the action of gravity, the exhaust pipe seat 4 and the exhaust pipe 1 are soaked, the surface tension action of the liquefied phase-change material block 6 in the gap between the exhaust pipe seat 4 and the exhaust pipe 1 is larger than the action of gravity, the liquefied phase-change material can be left in the exhaust pipe seat 4 and cannot flow out to form a hole, and therefore negative pressure sealing failure is prevented;
step (6), cooling the exhaust pipe seat 4 to 360 ℃ through the cooling pipeline 8 and cooling liquid therein, and re-solidifying the liquefied phase-change material, so that the exhaust pipe seat 4 and the exhaust pipe 1 are hermetically connected together to form negative pressure sealing;
step (7), exhausting air from the inner cavity of the negative-pressure plate 2 through the exhaust pipe seat 4 and the exhaust pipe 1;
and (8) sealing the exhaust pipe 1 to finish the negative pressure sealing of the negative pressure plate 2.
The foregoing description of the embodiments of the invention has been presented for purposes of illustration and not limitation, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.
Claims (6)
1. A connecting device for negative pressure sealing is characterized in that: including exhaust pipe seat, blast pipe, phase change material piece, heating element and/or cooling pipeline, pump-line establishes on the exhaust pipe seat, the big end of the tube hole of exhaust pipe seat is located to the phase change material piece, heating element and/or cooling pipeline all locate in the exhaust pipe seat, the phase transition temperature or the melting point of phase change material piece are less than the phase transition temperature or the melting point of negative pressure panel and blast pipe.
2. The connection device for negative pressure sealing according to claim 1, characterized in that: the exhaust pipe seat structure is characterized by further comprising a bottom gasket arranged in the pipe hole of the exhaust pipe seat and provided with a central through hole, the bottom gasket is arranged on a step portion in the pipe hole of the exhaust pipe seat and adopts a thin-wall flexible gasket, the central through hole is matched with the outer diameter of the exhaust pipe, and the phase change temperature or the melting point of the phase change material block is lower than that of the bottom gasket.
3. The connection device for negative pressure sealing according to claim 1, characterized in that: the negative pressure plate and the exhaust pipe are made of metal, ceramic, glass or plastic.
4. The connection device for negative pressure sealing according to claim 1, characterized in that: the phase-change material block is made of metal, glass, ceramic, organic matters or inorganic salt.
5. The connection device for negative pressure sealing according to claim 1, characterized in that: the infiltration angle between the liquefied phase-change material block and the exhaust pipe seat and between the liquefied phase-change material block and the exhaust pipe is not larger than 90 degrees, and the surface tension action of the liquefied phase-change material block in the gap between the exhaust pipe seat and the exhaust pipe is larger than the gravity action.
6. The connecting device for negative pressure sealing according to any one of claims 1 to 5, wherein: when the connecting device is arranged above the negative pressure plate, the top of the exhaust pipe seat is in threaded connection with a rotary cover, corresponding flange knife edges are arranged on the rotary cover and the exhaust pipe seat, the air exhaust pipeline is connected above the rotary cover, a sealing copper ring is arranged between the rotary cover and the flange knife edge of the exhaust pipe seat, and when the rotary cover is screwed, the rotary cover and the flange knife edge of the exhaust pipe seat are both cut into the sealing copper ring to form top sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020513428.7U CN212046323U (en) | 2020-04-10 | 2020-04-10 | Connecting device for negative pressure sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020513428.7U CN212046323U (en) | 2020-04-10 | 2020-04-10 | Connecting device for negative pressure sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212046323U true CN212046323U (en) | 2020-12-01 |
Family
ID=73541389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020513428.7U Active CN212046323U (en) | 2020-04-10 | 2020-04-10 | Connecting device for negative pressure sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212046323U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833851A (en) * | 2021-08-25 | 2021-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Seal assembly |
-
2020
- 2020-04-10 CN CN202020513428.7U patent/CN212046323U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833851A (en) * | 2021-08-25 | 2021-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Seal assembly |
| CN113833851B (en) * | 2021-08-25 | 2024-02-06 | 中国华能集团清洁能源技术研究院有限公司 | Seal assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212046323U (en) | Connecting device for negative pressure sealing | |
| CN102361679B (en) | Fabrication method for gas-adsorbing device, gas-adsorbing device, and method of using the same | |
| CN201473455U (en) | Encapsulated getter placed in vacuum glass | |
| CN209399737U (en) | A kind of pressure sintering furnace with proofing dust and protecting | |
| CN111284105B (en) | Negative pressure sealing method and connecting device | |
| CN201429319Y (en) | Vacuum melting device | |
| CN205275791U (en) | Artifical growing device of diamond single crystal | |
| CN114649466B (en) | Thermoelectric device based on filling capillary and preparation method thereof | |
| CN109538881A (en) | A kind of vacuum heat-insulation equipment and its production technology | |
| CN105554927A (en) | Far-infrared carbon fiber electric heating tube | |
| CN104817260A (en) | Vacuum glass edge sealing method and vacuum glass manufacturing method | |
| CN102775048A (en) | Device and method for manufacturing large-diameter quartz crucible | |
| CN209147724U (en) | Silicon wafer sintering furnace | |
| CN218580138U (en) | Single crystal furnace cover with heat preservation structure | |
| CN104291588A (en) | Mounting holes of vacuum glass and manufacturing method thereof | |
| CN202927121U (en) | Ball valve for tank bottom vacuum sampling | |
| CN206494983U (en) | A kind of coaxial electrode for guided mode stove | |
| CN206429364U (en) | A kind of vavuum pump for vacuum sealer is combined the unit | |
| CN104105233A (en) | Vacuum cavity heating tube device and heating tube | |
| CN103361676B (en) | The high temperature dynamic sealing method of battery lead rod in a kind of titanium fused salt electrolysis stove | |
| CN103072971B (en) | SCDD (Silicon Carbide Derived Diamond) and CDC (Carbide Derived Carbon) preparation device | |
| CN221028783U (en) | Single crystal furnace | |
| CN108613558A (en) | A kind of immersion integrated heating device | |
| CN220168619U (en) | High-temperature water-cooling gate valve | |
| CN2527923Y (en) | Thermal insulating tube equipment using solar heat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210926 Address after: 211500 406, 4th floor, Yuting Plaza, No. 59, Wangqiao Road, Xiongzhou street, Liuhe District, Nanjing, Jiangsu Province Patentee after: Nanjing Longwang New Material Technology Co.,Ltd. Address before: 202150 room 3353, building 2, No. 495, Yuejin South Road, Xinhai Town, Chongming District, Shanghai (Guangming rice industry economic Park) Patentee before: Shanghai Fengwan Trade Center |