End fixing and sealing structure of vacuum heater

Abstract

The utility model relates to the technical field of heater end head sealing, and discloses a vacuum heater end head fixing and sealing structure which comprises a standard KF center ring, a heater end head body is movably installed above the standard KF center ring, a counter bore is formed in the heater end head body, and the standard KF center ring is arranged in the counter bore. And a lower sealing ring pressing sheet is movably mounted on the inner side of the counter bore. The standard KF center ring is arranged at the opening of the cavity, the heating wire, the sealing ring, the lower sealing ring pressing piece and the upper sealing ring pressing piece are sequentially arranged in the counter bore, and the sealing ring is deformed and diffused inwards due to the inclination angle of the bottom of the upper sealing ring pressing piece. And when the heater end fastening gland is pressed tightly, the sealing ring extrudes the cold end of the heating wire, so that the effect of extruding the heating wire by the sealing ring is better, and the better sealing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of heater end sealing, and more specifically, to a vacuum heater end fixing and sealing structure. Background Art

[0002] In vacuum continuous coating equipment, substrate coating processes often require a heater to heat the vacuum vessel to a certain temperature. Therefore, the heater, a key component of the vacuum vessel, must be easily installed and sealed.

[0003] The method of fixing the end of the transfer heater is to fix the heated cold end by welding it into one piece to achieve vacuum sealing, which requires the use of special laser welding equipment. However, since the wall thickness of the cold end is generally thin, it is very easy to burn through during welding, and there are easy to be cold welds and leaks during welding. After long-term repeated heating and cooling, the welds are prone to leakage, which affects normal production and increases the subsequent maintenance costs. The entire unit needs to be replaced during maintenance, so it needs to be modified and optimized. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a vacuum heater end fixing sealing structure, which has the advantage of good sealing effect.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vacuum heater end fixed sealing structure, comprising a standard KF center ring, a heater end body movably mounted above the standard KF center ring, a countersunk hole is provided inside the heater end body, a lower sealing ring pressing piece is movably mounted inside the countersunk hole, sealing rings are movably mounted on both the upper and lower sides of the lower sealing ring pressing piece, an upper sealing ring pressing piece is movably mounted above the sealing ring, a heater end fastening cover is mounted above the heater end body for protection, a heating wire is movably mounted on one side of the heater end fastening cover, and the One end of the heating wire successively passes through the upper and lower sides of the heater end fastening cover and the heater end body, and the heating wire passes through the inside of the countersunk hole. A gland clamping screw is movably installed above the heater end fastening cover, and the bottom of the gland clamping screw passes through the upper and lower sides of the heater end fastening cover and extends to the inside of the heater end body. The heater end fastening cover and the heater end body are threadedly connected with the gland clamping screw. A standard KF half-open flange is movably installed above the heater end body, and the bottom of the upper sealing ring pressing piece is in the shape of a trumpet opening inward and has an inclination angle of fifteen degrees.

[0006] As an optimal technical solution of the present invention, the heating wire is movably connected to the sealing ring, the lower sealing ring pressing piece and the upper sealing ring pressing piece, and the sealing ring, the lower sealing ring pressing piece and the upper sealing ring pressing piece are located on the outer surface of the heating wire.

[0007] As a preferred technical solution of the present invention, a threaded hole is provided on the top of the standard KF half-open flange, and the bottom of the threaded hole passes through the bottom of the standard KF half-open flange.

[0008] As a preferred technical solution of the present invention, the number of the heating wires is three, and the outer surface of each heating wire is provided with a sealing ring, a lower sealing ring pressing plate and an upper sealing ring pressing plate.

[0009] As a preferred technical solution of the present invention, two sealing rings are provided on the outer surface of each heating wire, and the two sealing rings are separated by a lower sealing ring pressing sheet.

[0010] As a preferred technical solution of the present invention, the sealing ring is in an arc shape, and the sealing ring fits tightly against the outer surface of the heating wire.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] The utility model places a standard KF center ring at the cavity opening, places a heating wire, a sealing ring, a lower sealing ring pressing piece, and an upper sealing ring pressing piece in the countersunk hole in sequence, places a heater end fastening cover on the heater end body, and tightens and fixes the heater end fastening cover to the heater end body by means of a cover tightening screw. When tightening, the heater end fastening cover drives the upper sealing ring pressing piece to move downward, and due to the inclination angle of the bottom of the upper sealing ring pressing piece, the sealing ring is deformed and diffused inward. Compared with the traditional device, the device has a better sealing effect through the cooperation between the upper sealing ring pressing piece and the sealing ring, so that when the heater end fastening cover is tightened, the sealing ring is squeezed toward the cold end of the heating wire, so that the sealing ring squeezes the heating wire better, thereby achieving a better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the bottom structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 4 For this utility model Figure 3 A local enlarged schematic diagram of point A;

[0017] Figure 5 This is a schematic diagram of the sealing ring structure of the utility model.

[0018] In the figure: 1. Standard KF center ring; 2. Standard KF half-open flange; 3. Heater end body; 4. Heater end fastening cover; 5. Sealing ring; 6. Lower sealing ring pressing piece; 7. Upper sealing ring pressing piece; 8. Heating wire; 9. Cover tightening screw; 10. Countersunk hole; 11. Threaded hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 5 As shown, the utility model provides a vacuum heater end fixed sealing structure, including a standard KF center ring 1, a heater end body 3 is movably installed above the standard KF center ring 1, a countersunk hole 10 is opened inside the heater end body 3, a lower sealing ring pressing piece 6 is movably installed inside the countersunk hole 10, a sealing ring 5 is movably installed on both the upper and lower sides of the lower sealing ring pressing piece 6, an upper sealing ring pressing piece 7 is movably installed above the sealing ring 5, a heater end fastening cover 4 is installed above the heater end body 3 for protection, a heating wire 8 is movably installed on one side of the heater end fastening cover 4, and one end of the heating wire 8 It passes through the upper and lower sides of the heater end fastening cover 4 and the heater end body 3 in sequence, and the heating wire 8 passes through the inside of the countersunk hole 10. A cover clamping screw 9 is movably installed above the heater end fastening cover 4. The bottom of the cover clamping screw 9 passes through the upper and lower sides of the heater end fastening cover 4 and extends to the inside of the heater end body 3. The heater end fastening cover 4 and the heater end body 3 are threadedly connected with the cover clamping screw 9. A standard KF half-open flange 2 is movably installed above the heater end body 3. The bottom of the upper sealing ring pressing piece 7 is in the shape of a trumpet that opens inward and has an inclination angle of fifteen degrees.

[0021] When the staff uses it, they first place the standard KF center ring 1 on the opening reserved in the cavity, and then place the heating wire 8, sealing ring 5, lower sealing ring pressing plate 6 and upper sealing ring pressing plate 7 in the countersunk hole 10 in turn, and then place the heater end fastening cover 4 on the top of the heater end body 3, and screw the heater end fastening cover 4 and the heater end body 3 into the cover tightening screw 9 in turn to fix the position of the heater end fastening cover 4. When the cover tightening screw 9 is turned, it will drive the heater end fastening cover 4 to move downward. When the heater end fastening cover 4 moves downward, it will drive the upper sealing ring pressing plate 7 to move downward. When the upper sealing ring pressing plate 7 moves downward, since the bottom of the upper sealing ring pressing plate 7 has an inclined angle, the sealing ring 5 will be deformed and diffuse inward.

[0022] By placing the standard KF center ring 1 in the cavity opening, placing the heating wire 8, sealing ring 5, lower sealing ring pressing plate 6, and upper sealing ring pressing plate 7 in the countersunk hole 10 in sequence, and then placing the heater end fastening cover 4 on the heater end body 3, the heater end fastening cover 4 is tightened and fixed to the heater end body 3 by the cover tightening screw 9. When tightening, the heater end fastening cover 4 drives the upper sealing ring pressing plate 7 to move downward. Due to the inclination angle of the bottom of the upper sealing ring pressing plate 7, the sealing ring 5 is deformed and diffused inward. Compared with the traditional device, the device has a better sealing effect through the cooperation between the upper sealing ring pressing plate 7 and the sealing ring 5. When the heater end fastening cover 4 is tightened, the sealing ring 5 is squeezed toward the cold end of the heating wire 8, so that the sealing ring 5 squeezes the heating wire 8 better, thereby achieving a better sealing effect. At the same time, it has the characteristics of compact structure, simple and easy operation, fast installation of standard joints, quick and convenient replacement of damaged heating wires, good compression and sealing effect, and low cost.

[0023] The heating wire 8 is movably connected to the sealing ring 5 , the lower sealing ring pressing piece 6 and the upper sealing ring pressing piece 7 , and the sealing ring 5 , the lower sealing ring pressing piece 6 and the upper sealing ring pressing piece 7 are located on the outer surface of the heating wire 8 .

[0024] The heating wire 8 is movably connected with the sealing ring 5, the lower sealing ring pressing piece 6, and the upper sealing ring pressing piece 7 to form a structure. By squeezing the upper sealing ring pressing piece 7, the sealing ring 5 is deformed on the inside.

[0025] A threaded hole 11 is provided on the top of the standard KF half-open flange 2 , and the bottom of the threaded hole 11 passes through the bottom of the standard KF half-open flange 2 .

[0026] The design of the threaded hole 11 facilitates the device to be fixed to the opening of the vacuum container by means of bolts.

[0027] There are three heating wires 8 , and the outer surface of each heating wire 8 is provided with a sealing ring 5 , a lower sealing ring pressing piece 6 and an upper sealing ring pressing piece 7 .

[0028] The outer surfaces of the three heating wires 8 are all provided with a sealing ring 5 , a lower sealing ring pressing piece 6 and an upper sealing ring pressing piece 7 , thereby improving the sealing effect.

[0029] Two sealing rings 5 ​​are provided on the outer surface of each heating wire 8 , and the two sealing rings 5 ​​are separated by a lower sealing ring pressing sheet 6 .

[0030] The design of the sealing ring 5 can improve the sealing effect of the device, thereby improving the working efficiency of the device.

[0031] The sealing ring 5 is in an arc shape, and the sealing ring 5 is in close contact with the outer surface of the heating wire 8 .

[0032] The outer shape design of the sealing ring 5 allows the inner side of the sealing ring 5 to fit more closely with the outer side of the heating wire 8 .

[0033] The working principle and use process of this utility model:

[0034] When the staff uses it, they first place the standard KF center ring 1 on the opening reserved in the cavity, and then place the heating wire 8, sealing ring 5, lower sealing ring pressing plate 6 and upper sealing ring pressing plate 7 in the countersunk hole 10 in turn, and then place the heater end fastening cover 4 on the top of the heater end body 3, and screw the heater end fastening cover 4 and the heater end body 3 into the cover tightening screw 9 in turn to fix the position of the heater end fastening cover 4. When the cover tightening screw 9 is turned, it will drive the heater end fastening cover 4 to move downward. When the heater end fastening cover 4 moves downward, it will drive the upper sealing ring pressing plate 7 to move downward. When the upper sealing ring pressing plate 7 moves downward, since the bottom of the upper sealing ring pressing plate 7 has an inclined angle, the sealing ring 5 will be deformed and diffuse inward.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum heater end fixed sealing structure, comprising a standard KF center ring (1), characterized in that: A heater end body (3) is movably mounted above the standard KF center ring (1), a counterbore (10) is provided inside the heater end body (3), a lower sealing ring pressing piece (6) is movably mounted inside the counterbore (10), a sealing ring (5) is movably mounted on both the upper and lower sides of the lower sealing ring pressing piece (6), an upper sealing ring pressing piece (7) is movably mounted above the sealing ring (5), a heater end fastening cover (4) is mounted above the heater end body (3), a heating wire (8) is movably mounted on one side of the heater end fastening cover (4), one end of the heating wire (8) successively passes through the heater end fastening cover (4) and The heating wire (8) passes through the inside of the countersunk hole (10) on the upper and lower sides of the heater end body (3); a pressure cover clamping screw (9) is movably installed above the heater end fastening cover (4); the bottom of the pressure cover clamping screw (9) passes through the upper and lower sides of the heater end fastening cover (4) and extends to the inside of the heater end body (3); the heater end fastening cover (4) and the heater end body (3) are threadedly connected with the pressure cover clamping screw (9); a standard KF half-open flange (2) is movably installed above the heater end body (3); the bottom of the upper sealing ring pressing piece (7) is in the shape of a trumpet that opens inward and has an inclination angle of fifteen degrees.

2. The vacuum heater end fixing and sealing structure according to claim 1, characterized in that: The heating wire (8) is movably connected to the sealing ring (5), the lower sealing ring pressing plate (6) and the upper sealing ring pressing plate (7); the sealing ring (5), the lower sealing ring pressing plate (6) and the upper sealing ring pressing plate (7) are located on the outer surface of the heating wire (8).

3. The vacuum heater end fixing and sealing structure according to claim 1, characterized in that: A threaded hole (11) is provided on the top of the standard KF half-open flange (2), and the bottom of the threaded hole (11) passes through the bottom of the standard KF half-open flange (2).

4. The vacuum heater end fixing and sealing structure according to claim 1, characterized in that: The number of the heating wires (8) is three, and the outer surface of each heating wire (8) is provided with a sealing ring (5), a lower sealing ring pressing plate (6) and an upper sealing ring pressing plate (7).

5. The vacuum heater end fixing and sealing structure according to claim 1, characterized in that: Two sealing rings (5) are provided on the outer surface of each heating wire (8), and the two sealing rings (5) are separated by a lower sealing ring pressing sheet (6).

6. The vacuum heater end fixing and sealing structure according to claim 1, characterized in that: The sealing ring (5) is in the shape of an arc, and the sealing ring (5) is tightly fitted to the outer surface of the heating wire (8).

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