KR870000549Y1 - A fixing apparatus of nozzle - Google Patents

Abstract

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Description

Mounting structure of nozzle made of special material to pressure vessel

1 and 2 are side cross-sectional views of a conventional mounting structure for mounting a nozzle to a pressure vessel.

3 is a side cross-sectional view of the nozzle mounting structure according to the first embodiment of the present invention.

4 is a side cross-sectional view of a mounting structure according to a second embodiment of the present invention.

5 is a side cross-sectional view of a mounting structure according to a third practical example of the present invention.

6 is a cross-sectional view taken along the line A-A of FIG. 5 and viewed in the direction of the arrow.

7 is a side cross-sectional view of the nozzle mounting structure according to the fourth embodiment of the present invention.

8 is a side cross-sectional view of the nozzle holder structure according to the fifth embodiment of the present invention.

* Description of the main parts of the drawings

15: pressure vessel body 16: liner

18,18 ': nozzle body 20: contact part

24: end 25, 25 ': inlet

26: outer peripheral portion 27, 34: screw portion

35: inlet portion 37: rotation fixing member

40: insertion hole 41: mounting hole

42: annular member

The present invention provides a cylindrical nozzle body of a material which cannot be welded to the pressure vessel body in a pressure vessel body having an internal lining for the purpose of mounting the nozzle to the pressure vessel, and more specifically, for corrosion resistance. It relates to a mounting structure for mounting.

If the pressure vessel has a lining of non-ferrous metal material that cannot be welded to a steel-made vessel such as titanium, the inner surface of the nozzle to be mounted on the pressure vessel shall be of corrosion resistant material.

Conventional nozzle mounting structure for this purpose, as shown in Figure 1, the nozzle body (2) made of the same material as the pressure vessel body (1) is welded to the pressure vessel body (1) in the welding section (3), A liner made of a special material is attached to the inner surface of the nozzle body 2, and the liner 5 and the liner 4 attached to the inner surface of the pressure vessel main body 1 at the portion 6 are attached. ) Is completed by welding. However, since the thermal expansion coefficients of the liner 4 attached to the nozzle side and the nozzle body 2 are different from each other as the low temperature condition is repeated due to shutdown or the like, the nozzle side liner 4 as shown in FIG. ) And cracks 7 occur in the weld 6 of the container body side liner 5 or a gap 8 occurs in the container body side liner 5.

Therefore, not only the undesirable phenomenon such as corrosion, but also the corrosive liquid flows into the nozzle side liner 4 and the tip 9 is eroded quickly, so the nozzle side liner 4 should be replaced regularly.

However, in the above structure, it is very difficult to replace only the nozzle side liner because the weld portion 6 has considerable strength, and the coupling portion 10 must be provided with a gasket sheet 11 and a flange of the nozzle body opposite to the liner 4. ), The structure is complicated, and thus the manufacturing cost is high and the assembly process is difficult.

Accordingly, an object of the present invention is to consist of a nozzle body having an inner lining of a special material and a nozzle body of a material which cannot be welded to an integrally formed pressure vessel body, instead of a screw structure for fixing the nozzle to the container body. The present invention provides a mounting structure for mounting a nozzle made of a special material in a solvent vapor phase. The main characteristic of the mounting structure of the present invention for mounting a nozzle made of a special material in a pressure vessel is that the nozzle body is at the leading end of the nozzle body and is behind the recess and the inlet facing the pressure vessel. The outer peripheral portion is a contact surface with the pressure vessel main body (stdpped portion) and the rear end of the inlet portion is provided with a screw for fixing the nozzle body to the pressure vessel.

The above and other objects, features and advantages of the present invention will be described in more detail with reference to the accompanying drawings.

Specific embodiments of the present invention are described in detail from FIG.

3 is a side cross-sectional view of the nozzle mounting structure according to the first embodiment of the present invention, FIG. 4 is a side cross-sectional view of the mounting structure according to the second embodiment, and FIG. 5 is a side cross-sectional view of the mounting structure according to the third embodiment. 6 is a cross-sectional view taken along the line AA of FIG. 7 is a side cross-sectional view of the nozzle mounting structure according to the fourth embodiment, and FIG. 8 is a side cross-sectional view of the nozzle mounting structure according to the fifth embodiment.

In FIG. 3 showing the first embodiment, the forced pressure base 15 has an inner liner 16 made of a corrosion resistant material such as titanium and zirconium and adapted to be attached to the body. The pressure vessel body 15 is formed with a boss portion 17 having a mounting hole 19 for inserting the nozzle body 18 made of special materials such as titanium and zirconium.

The installation hole 19 is opened to the internal space 21 inside and outside the nozzle body 18 through the contact portion 20. The nozzle body 18 has a nozzle opening portion 22 for passage of corrosive fluid or the like at its center portion, a collar 23 integrally formed at the front end in a flange shape, and a contact portion 20 at the rear of the collar portion 23. The horizontal end part 24 which comes into contact with is formed. At the rear of the collar portion 23, there is formed an inlet 25 which abuts on the surface of the inner liner 16 of the pressure vessel body in a mounted state as shown in FIG.

It should be noted that the outer diameter of the outer circumferential portion 26 of the protrusion 33 extending rearward of the end 24 is slightly smaller than the inner diameter of the mounting hole 19.

A screw portion 27 is formed at the outer circumferential portion of the rear end of the protruding portion 33 extending from the pressure vessel portion, so that the nut 28 fitted to the screw portion 27 and the collar portion 23 of the nozzle body 18 are formed. By fixing the boss 17 of the pressure vessel body of the liner 16, the nozzle body 18 may be coupled to the pressure vessel body.

The sealing part 29 is formed by welding the joint part of the collar part 23 and the liner 16 of the nozzle body 18 fixed to the pressure vessel main body 15 by the nut 28. The nozzle body 18 is also provided with a gasket seat 31 in which the flange 32 is screwed with the opposing flange at the rear end of the main body.

In order to mount the nozzle body on the pressure vessel body, the projection 33 of the nozzle body 18 is inserted from the inside of the container to the outside in the mounting hole 19 of the pressure vessel body.

The end 24 of the nozzle body is placed in contact with the contact portion 20, and then the nut 28 having a screwing relationship with the screw portion is tightened so that the nozzle body is coupled to the pressure vessel body.

Finally, the collar portion 23 is welded to the liner 16. Preferably, the flange 32 may be threaded to the threaded portion 27 when connecting the flange 32 to a piping system.

In the first embodiment in which the nozzle body is coupled to the pressure vessel body by the tightening force of the nut 28, when the operation and shutdown are repeated, the nozzle body expands and contracts due to the difference in thermal expansion coefficient between the pressure vessel body and the nozzle body. There is a fear that the tightening force of the nut 28 is weakened and adversely affects the sealing weld 29 of the liner 16.

The second embodiment of FIG. 4 improves the above-mentioned point, whereby the screw body 34 is formed at the portion where the nozzle body 18 'is to be engaged with the end 24 of the protrusion 33, and the pressure vessel main body. In the mounting hole 19 in the protruding portion 17, the screw structure to be matched with the screw portion 34 is formed.

In the first embodiment, the collar 23 is formed at the tip of the nozzle body so that the pressure vessel body is sandwiched between the collar 23 and the nut 28. In the second embodiment of FIG. An inlet portion 25 'of the nozzle body in contact with the liner 16 is formed at the tip of the nozzle body so that the liner 16 covers the inlet portion 25'.

In this embodiment, since the nozzle body 18 'is directly screwed into the container body 15 and the boss portion 17, there is no fear that the coupling between the nozzle body and the pressure vessel body will weaken even if the nozzle body is expanded by heat. .

Another advantage is that the front end of the nozzle body is protected by the liner 16 and the sealing welding portion 29 'is formed in the portion, there is an advantage that can be more complete sealing by welding.

In the first and second embodiments in which the screw structure is coupled to the nozzle body pressure vessel body, it is necessary to prevent the nozzle body from rotating due to vibration of the container or other reasons.

By the way, the sealing welds 29 and 29 'merely seal the structure and do not have enough strength to prevent the nozzle body from rotating.

5 and 6 provide a rotation fixing structure of the nozzle body in the third embodiment shown.

In these figures, an improvement of the nozzle mounting structure of FIG. 4 is proposed, and two planar inlet symmetrical to each other are formed on the outer circumferential portion 26 of the nozzle body 18 'extending outward of the boss portion 17 of the pressure vessel body. Rotating fixing members 37 and 27 having a part 35 and a planar part 36 adapted to the planar inlet part are coupled to the boss part of the pressure vessel body by bolts 38. That is, the rotation fixing members 37 and 37 are coupled to the nozzle body 18 by being tightened as bolts 38 to the outer circumferential portion 26 of the nozzle body 18.

At this time, the planar portion 36 inside the rotation fixing member is engaged with the inlet portion 35 of the nozzle body 18 'at the time of engagement.

The rotation fixing members 37 and 37 are coupled to the pressure main body by the bolt 39 to prevent the nozzle body 18 'from rotating.

When the nozzle body is coupled to the pressure vessel body in a nozzle mounting structure having a play therein, as in the first, second and third embodiments, external force is applied from the piping system to the nozzle body so that the nozzle body is deformed or liner ( A large stress is generated on the sealing welds 29 and 29 'between the nozzle 16 and the nozzle body.

Therefore, it is more preferable to closely couple the nozzle body to the pressure vessel body.

7 shows an improved nozzle mounting structure designed in view of the above.

The tip end of the nozzle body 18 "fits into an insertion hole 40 of the pressure vessel body 15 so that the outer periphery of the tip end of the nozzle body is tightly coupled into the insertion hole 40. The mounting hole 41 and An annular member 42 fitted to the outer circumferential portion 26 of the nozzle body 18 "is press-fitted inside the discharge portion of the coaxially mounted mounting hole 41, thereby providing a nozzle body 18". By maintaining a close bond between the pressure vessel body 15 and the lateral deformation of the nozzle body is prevented.

In the above embodiment, although the boss portion 17 of the pressure vessel body for mounting the nozzle body and its protrusion is integrally formed, it is apparent that these parts can be separated if necessary.

In the fifth embodiment of FIG. 8, the lid 43 as part of the pressure vessel body is separated from the protrusion 15 'of the pressure vessel body and secured to the protrusion 15' with the bolt 44.

In the above embodiments, the pressure vessel body is sandwiched between the nozzle bodies to couple the nozzle body to the pressure vessel body, or by a screw portion formed near the tip end of the nozzle body.

When the nozzle body itself is expanded or contracted due to the swelling of the working temperature or the like, the nozzle body is freely expanded or contracted along the axial direction from the structural point of view. Even if the nozzle body is inflated or raised, the sealing welds 29 and 29 'have little adverse effect since the distance between the screw portion and the tip surface of the nozzle body is short.

Therefore, there is no problem in the mounting structure inside the body that cracks are generated in the sealing welds 29 and 29 ', or a liner on the side of the pressure vessel occurs due to a temperature change and a gap is generated.

As described above, an object of the present invention is to provide a structure for mounting a cylindrical nozzle body made of a material which cannot be welded to a pressure vessel body on a pressure vessel body having an inner liner.

Mounting structure for mounting the nozzle of the special material according to the present invention has the following features.

That is, the nozzle body is connected to the inner liner attached to the inner surface of the container and the inlet part contacted at the tip portion facing the inside of the pressure vessel, the end contacting the contact portion of the container body at the rear outer part of the inlet part and the rear outer part of the rear part of the inlet part. It is provided with a screw portion to engage.

Since the expansion or contraction of the nozzle body due to the change of the working temperature does not affect the welding sealing of the nozzle and the lining, the lining around the nozzle device becomes more durable and can withstand long time use.

In addition, the sealing weld can be easily removed.

In addition, it is easy to replace the nozzle when the first one resembles by erosion or corrosion because the nut or bolt can be easily removed by loosening the nut or bolt.

In addition, since the nozzle body made of a special material is integrally formed, the work of the gasket of the rear end of the nozzle, which is the coupling portion or its other portions and the coupling portion with the opposing flange, is simple.

Therefore, the manufacturing cost can be saved, and the working time can be reduced.

Although the preferred embodiment of the present invention has been described above, various technical changes are possible within the scope of the present invention.

Claims (4)

In the mounting structure for mounting the cylindrical nozzle body (18, 18 ', 18 ") made of a material which cannot be welded to the pressure vessel body (15) to the pressure vessel body (15) with the liner (16) attached to the inner surface. In the inlet 25 which contacts the liner 16 attached to the inner surface of the pressure vessel body 15 at the inner end of the pressure vessel body 15 of the nozzle body 18, 18 ', 18 ". 25 ') and an end portion 24 contacting the contact portion 20 of the pressure vessel main body 15 with a rear outer peripheral portion of the inlet portions 25 and 25', so as to be rearward of the end portion 24. The outer peripheral portion 26 is made of a special material for the pressure vessel, characterized in that it comprises a screw portion (27, 34) for coupling the nozzle body (18, 18 ', 18 ") to the pressure vessel body (15) Mounting structure of the nozzle. The cylindrical outer circumferential portion 26 of the nozzle body 18 'is fixed to the pressure vessel main body 15 and an inlet portion engaged with the rotation fixing member 37. A mounting structure for a nozzle made of a special material to a pressure vessel, characterized in that (35) is provided. 2. The nozzle mounting structure of claim 1, wherein the tip of the nozzle body (18 ") is fitted into the insertion hole (40) of the pressure vessel main body (15). 2. The nozzle body (18) according to claim 1, wherein the annular member (42) fitted to the outer peripheral portion (26) of the nozzle body (18 ") is press-fitted into the mounting hole (41) formed in the pressure vessel main body (15). Mounting structure of the nozzle made of a special material to the pressure vessel, characterized in that to prevent the lateral deformation of the.