CN111946918A - Low-temperature main sealing structure - Google Patents

Abstract

The invention discloses a low-temperature primary sealing structure, comprising a primary sealing member and a secondary sealing member, the primary sealing member includes an end face on the primary sealing surface and a lower end surface of the primary sealing surface, and the secondary sealing member includes a secondary sealing side sealing surface, a secondary sealing member The lower end face and the upper end face of the secondary seal, the secondary seal is fitted and fixed on the outer surface of the primary seal, the axis of the secondary seal and the primary seal are in a straight line, the primary seal and the secondary seal The inner part of the outer end is fixedly connected with a helical spring clip, the end of the secondary seal is a spherical structure, and the surface of the side sealing surface of the secondary seal is a circular arc structure; The concentricity of the sealing surface and the increase of the sealing surface can more effectively ensure the sealing performance of liquid and gas when passing through the sealing element, thereby increasing the service life of the sealing element and enhancing the sealing effect of the sealing element.

Description

Low temperature main sealing structure

technical field

The invention relates to the technical field of rotary joint sealing, in particular to a low temperature main sealing structure.

Background technique

At present, the seals of the low-temperature rotary joints of the fluid handling arm in the cryogenic industry are all in the form of double seals, that is, the primary seal and the secondary seal. Because the primary and secondary sealing surfaces are both double-sided, that is, the front and back of the seal are both sealing surfaces. The seals on the market still have various deficiencies, which cannot meet the needs of production and life;

If there is leakage at any point of the front and back sealing surfaces, the whole rotary joint will leak. In actual use, the leakage of the rotary joint will cause frequent replacement of wearing parts such as the seal of the loading and unloading arm, which will increase the operation and maintenance cost. Therefore, we propose a low temperature main Sealed structure.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the present invention provides a low-temperature main sealing structure, which can solve the technical problem of frequent replacement of wearing parts such as the seal of the loading and unloading arm due to the leakage of the rotary joint in the actual application of the current seal, which increases the operation and maintenance cost. .

In order to solve the above technical problems, the present invention provides the following technical solutions: a low-temperature primary sealing structure includes a primary sealing member and a secondary sealing member, the primary sealing member includes an end surface on the primary sealing surface and a lower end surface on the primary sealing surface, and the secondary sealing member It includes the side sealing surface of the secondary seal, the lower end surface of the secondary seal and the upper end surface of the secondary seal. The secondary seal is fitted and fixed on the outer surface of the primary seal, and the axis of the secondary seal and the primary seal is in a straight line. The outer ends of the primary seal and the secondary seal are fixedly connected with a coil spring clip, the end of the secondary seal is a spherical structure, and the surface of the side sealing surface of the secondary seal is an arc structure.

Preferably, a protective cover is provided on the outer wrapping of the primary seal and the secondary seal, and a cover is provided outside the port of the protective cover.

Preferably, the protective cover has a hollow cylindrical structure, and the cover is bonded and fixed to the end face of the protective cover.

Preferably, the outer surface of the secondary seal is provided with a fixing band, and the fixing band is fixed at the center of the axis of the secondary seal.

Preferably, one end of the fixing band is glued and fixed with the secondary sealing member, and the end corner of the fixing band is a circular arc structure.

Preferably, a label sticker is fixedly connected to the outer surface of the fixing band, and a sleeve hole is opened on the outer side of the end of the fixing band.

As a preferred technical solution of the present invention,

Compared with the prior art, the beneficial effects that the present invention can achieve are:

1. Through the design of the side sealing surface of the secondary seal, the problem of frequent replacement of vulnerable parts such as the seal of the loading and unloading arm due to the leakage of the rotary joint in the actual application of the current seal, which increases the cost of operation and maintenance, adopts an integrated seal. , to ensure the concentricity of each sealing surface of the integrated type, and increase the sealing surface, more effectively ensure the sealing of liquid and gas when passing through the seal, thereby increasing the service life of the seal and enhancing the sealing effect of the seal ;

2. The designed protective sleeve solves the problem that the sealing surface of the current seal is prone to external wear during transportation and storage, thereby affecting the sealing effect of the seal. wear during the process;

3. Through the designed fixing belt, the problem of inconvenient access to the current seal is solved. It is convenient to take the seal through the sleeve hole of the fixing belt. The outer label of the fixing belt records the information of the fixing piece, and the fixing belt can be removed. Affect the normal use of the fasteners.

Description of drawings

Fig. 1 is the structural representation of the present invention;

FIG. 2 is a schematic diagram of the fixing belt according to the present invention.

Among them: 1. The end face of the main sealing surface; 2. The main sealing part; 3. The lower end face of the main sealing surface; 4. The sealing surface of the secondary sealing surface; 8. The lower end surface of the secondary seal; 9. The upper end surface of the secondary seal; 10. Labeling stickers; 11. Holes; 12. Covers; 13. Protective sleeves.

Detailed ways

In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the examples in the implementation manner, other examples obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following examples can be obtained from commercial sources unless otherwise specified.

Example 1

Referring to FIG. 1, the present invention provides a low-temperature primary sealing structure, including a primary sealing member 2 and a secondary sealing member 6. The primary sealing member 2 includes an end surface 1 on the primary sealing surface and a lower end surface 3 on the primary sealing surface, and the secondary sealing member 6 includes The side sealing surface 4 of the secondary seal, the lower end surface 8 of the secondary seal and the upper end surface 9 of the secondary seal, the secondary seal 6 is attached and fixed on the outer surface of the primary seal 2, and the axis of the secondary seal 6 and the primary seal 2 is in a straight line Above, the outer ends of the primary seal 2 and the secondary seal 6 are fixedly connected with a helical spring clip 5, the end of the secondary seal 6 is a spherical structure, and the surface of the secondary seal side sealing surface 4 is a circular arc structure;

Effectively solve the problem that the rotary joint cannot be sealed, change the double-sided dynamic seal of the seal to a relative single-sided dynamic seal, the main sealing surface leaks at one point, and the leaked medium flows into the secondary seal 6 correspondingly, and the secondary sealing surface enjoys the main seal The same sealing function of component 2, this seal is also a relatively single-sided dynamic seal, and at the same time, the secondary sealing side sealing surface 4 is added, so that the sealing component and the rotary joint increase an effective sealing surface, thus effectively ensuring the liquid and gas. Time does not leak function.

Example 2

Please refer to FIG. 1 and FIG. 2 , the present invention provides a low-temperature primary sealing structure, including a primary sealing member 2 and a secondary sealing member 6 . The outer wrapping of the primary sealing member 2 and the secondary sealing member 6 is provided with a protective cover 13 . The protective cover 13 A cover 12 is provided on the outside of the port, the protective cover 13 is a hollow cylindrical structure, and the cover 12 is bonded and fixed with the end face of the protective cover 13;

The protective sleeve 13 wraps and covers the outside of the fixing piece, which effectively prevents the fixing piece from being worn during transportation, and solves the problem that the sealing surface of the current sealing piece is prone to external wear during transportation and storage, thereby affecting the sealing effect of the sealing piece.

Example 3

Please refer to FIG. 1 and FIG. 2 , the present invention provides a low-temperature primary sealing structure, including a primary sealing member 2 and a secondary sealing member 6 . The outer surface of the secondary sealing member 6 is provided with a fixing belt 7 , and the fixing belt 7 is fixed on the secondary sealing member. The center point of the axis of 6, one end of the fixing band 7 is glued and fixed with the secondary seal 6, the end corner of the fixing band 7 is a circular arc structure, the outer surface of the fixing band 7 is fixedly connected with a label sticker 10, and the end of the fixing band 7 is fixed. A sleeve hole 11 is opened on the outside of the part;

It is convenient to take the seal through the sleeve hole 11 of the fixing belt 7. The outer label 10 of the fixing belt 7 records the information of the fixing piece. The fixing belt 7 can be removed without affecting the normal use of the fixing piece, which solves the inconvenience of taking the sealing piece at present. The problem.

The low-temperature main sealing structure provided by the invention effectively solves the problem of insufficient sealing of the rotary joint. The double-sided dynamic seal of the seal is changed to a relative single-sided dynamic seal, the main sealing surface leaks at one point, and the leaked medium flows into the secondary seal correspondingly. Part 6, the secondary sealing surface enjoys the same sealing function as the main sealing part 2. This seal is also a relatively single-sided dynamic seal, and at the same time, the secondary sealing side sealing surface 4 is added to increase the effective sealing surface between the seal and the rotary joint. Therefore, Effectively ensure the long-term non-leakage function of liquid and gas; solve the problem that the sealing surface of the current seal is prone to external wear during transportation and storage, thereby affecting the sealing effect of the seal. It can effectively prevent the wear and tear of the fixed parts during transportation; solve the problem of inconvenient access to the current seals. The fixing belt 7 can be removed without affecting the normal use of the fixing piece.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention, without departing from the spirit and scope of the present invention. Under the premise, the present invention will also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. Low temperature main seal structure, including main sealing member (2) and secondary seal (6), its characterized in that: the main sealing element (2) comprises a main sealing surface upper end face (1) and a main sealing surface lower end face (3), the secondary sealing element (6) comprises a secondary sealing side surface sealing face (4), a secondary sealing lower end face (8) and a secondary sealing upper end face (9), the secondary sealing element (6) is attached and fixed to the outer side surface of the main sealing element (2), the secondary sealing element (6) and the axis of the main sealing element (2) are on the same straight line, spiral spring clamps (5) are fixedly connected to the inner portions of the outer ends of the main sealing element (2) and the secondary sealing element (6), the end portion of the secondary sealing element (6) is of a spherical structure, and the surface of the secondary sealing side surface sealing face (4) is of a circular arc structure.

2. The cryogenic primary seal structure of claim 1, wherein: the outer portions of the main sealing piece (2) and the secondary sealing piece (6) are wrapped by a protective sleeve (13), and a sealing cover (12) is arranged outside a port of the protective sleeve (13).

3. The cryogenic primary seal structure of claim 2, wherein: the protective sleeve (13) is of a hollow cylindrical structure, and the sealing cover (12) is fixedly bonded with the end face of the protective sleeve (13).

4. The cryogenic primary seal structure of claim 1, wherein: the outer side surface of the secondary sealing element (6) is provided with a fixing belt (7), and the fixing belt (7) is fixed at the center of the axis of the secondary sealing element (6).

5. The cryogenic primary seal structure of claim 4, wherein: one end of the fixing band (7) is glued and fixed with the secondary sealing element (6), and the end angle of the fixing band (7) is of a circular arc-shaped structure.

6. The cryogenic primary seal structure of claim 4, wherein: the outer side surface of the fixing band (7) is fixedly connected with a marking sticker (10), and the outer side of the end part of the fixing band (7) is provided with a trepanning (11).

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