阅读说明：本技术 一种跨越式密封结构 (A kind of great-leap-forward sealing structure ) 是由 丁冬平 成照宇 胡啸 蔡家藩 周礼峰 于 2018-05-22 设计创作，主要内容包括：本发明属于核行业以及其它行业无损检测技术领域,具体涉及一种跨越式密封结构,目的是解决跨越大直径管段实现下部小直径管段的密封问题。其特征在于,包括液体收集容器及机架、密封滑板、密封胶条、密封驱动气缸和应急回拉弹簧。本发明通过形状配合及密封胶条本身的形变实现了跨越大直径管段实现下部小直径管段的密封功能；为上大下小、竖直状态顶部盲端管道,需使用液体实施检查、维修作业的工作提供了解决办法。(The invention belongs to core industry and other industry technical field of nondestructive testing, and in particular to a kind of great-leap-forward sealing structure, it is therefore an objective to solve the sealing problem that lower small diameter pipeline section is realized across major diameter pipeline section.It is characterised in that it includes liquid collecting container and rack, drop bar, sealing joint strip, sealing driving cylinder and emergency Return spring.The present invention is cooperated by shape and the deformation of sealing joint strip itself realizes the sealing function that lower small diameter pipeline section is realized across major diameter pipeline section；For cecum pipeline at the top of up big and down small, vertical state, liquid implementation inspection, the work of maintenance activity need to be used to provide solution.)

1. a kind of great-leap-forward sealing structure, it is characterised in that: it include liquid collecting container and rack (4), drop bar (5), Sealing joint strip (6), sealing driving cylinder (7) and emergency Return spring (8)；Liquid collecting container and rack (4) play carrying, And undertake the purposes that liquid is collected, axial, the circumferential initial position of detected object determines；Sealing driving cylinder (7) is fixed on liquid The lower end of collection vessel and rack (4), for driving drop bar (5) radially movable；Drop bar (5) is located at liquid collection The lower section of container and rack (4) is fixed on the inside of sealing driving cylinder (7) cylinder rod, for driving sealing joint strip (6) along diameter To movement；Sealing joint strip (6) is fixed on the inside of drop bar (5), for realizing with path seal section, liquid outside examining pipeline Sealing between body collection vessel and rack (4)；One end of emergency Return spring (8) and the cylinder body of sealing driving cylinder (7) connect Connect, the other end is connect with the end face outside of drop bar (5), in case of emergency by drop bar (5) radially Layback goes out.

2. great-leap-forward sealing structure according to claim 1, it is characterised in that: the liquid collecting container and rack (4) the generally hollow cylindrical of upper and lower opening；The lower part of liquid collecting container and rack (4) outer wall is provided with annular Connecting flange, for being fixedly connected with sealing driving cylinder (7)；The diameter of liquid collecting container and rack (4) lower ending opening is small In upper end opening diameter, the diameter of lower ending opening is greater than by inspection cecum pipeline (1) more than by inspection weld seam present position (2) most The outer diameter at major diameter position, it is ensured that this structure can smoothly across；On liquid collecting container and rack (4) lower ending opening position edge It is axially downwardly provided with annular protrusion, realizes sealing for being fitted close with sealing joint strip (6).

3. great-leap-forward sealing structure according to claim 2, it is characterised in that: the sealing drives cylinder (7) cylinder body Partial upper end is fixedly connected with the connecting flange of liquid collecting container and rack (4)；Sealing drives the interior of cylinder (7) cylinder rod Side end face is fixed on the outside of drop bar (5).

4. great-leap-forward sealing structure according to claim 2, it is characterised in that: the drop bar (5) is generally fanned Shape plate, cross section are L shape, be disposed radially on the inner sidewall of L shape vertical edge it is fluted, for installing sealing joint strip (6), be disposed radially on the inner sidewall of L shape horizontal edge it is fluted, for installing sealing joint strip (6)；Drop bar (5) is close Be close under the driving of envelope driving cylinder (7) liquid collecting container and rack (4) lower surface radially moves back and forth realization seal, Resigning movement.

5. great-leap-forward sealing structure according to claim 4, it is characterised in that: the sealing joint strip (6) generally in Empty fanning strip；In the groove for the inner sidewall that sealing joint strip (6) sector Inner arc is mounted on drop bar (5) L shape horizontal edge；In Upward, downward protrusion is arranged in the Inner arc of sealing joint strip (6) sector and radius side along the vertical direction；Inner arc position protrusion Inner wall be by inspection part path seal section sealing surface (12), it is real for being in close contact with path seal section (3) outside examining pipeline Now seal；The inner wall of radial location protrusion is contiguous seal face (11), is sealed for realizing with adjacent sealing joint strip (6)；In Two radiuses of sealing joint strip (6) sector and external arc intersection position are respectively arranged with upward inverted "L" shape linkage section, at two Connecting pin is attached close to the end face of center of circle side by arc-shaped interconnecting piece；The inner side end of the arc-shaped interconnecting piece is Liquid collecting container sealing surface (10) is sealed for realizing with the outer wall of liquid collecting container and rack (4) annular protrusion；It is described The end face outside of arc-shaped interconnecting piece has been disposed radially arc convex, is mounted on the inner sidewall of drop bar (5) L shape vertical edge Groove in.

6. great-leap-forward sealing structure according to claim 5, it is characterised in that: be in and withdraw in sealing driving cylinder (7) When state, the diameter of bore that diameter of a circle is greater than liquid collecting container and rack (4) lower part is inscribed in sealing joint strip (6), it is ensured that energy It is enough smoothly across by inspection cecum pipeline (1) more than by inspection weld seam present position (2) maximum outer diameter position.

7. great-leap-forward sealing structure according to claim 1, it is characterised in that: emergency Return spring (8) described in two Corresponding sealing driving cylinder (7) and slide plate sealing together (5) are driven by directly cutting off sealing when the unexpected happens It takes offence cylinder (7) pipeline, drop bar (5) carries sealing joint strip (6) and recycles under the action of meeting an urgent need Return spring (8), makes this knot Structure can safe escape by inspection cecum pipeline (1).

8. great-leap-forward sealing structure according to claim 1, it is characterised in that: it further includes liquid delivery port (9), liquid Water outlet (9) is arranged on the outer wall of drop bar (5), for arranging liquid collecting container and rack (4) inner containment liquid Out.

9. great-leap-forward sealing structure according to claim 5, it is characterised in that: described sealing driving cylinder (7), Slide plate (5) sealing together and adhesive tape sealing together (6) are one group, be arranged altogether it is more than two, along liquid collecting container and rack (4) Connecting flange lower end is uniformly distributed.

10. great-leap-forward sealing structure described in -10 any one according to claim 1, it is characterised in that: the sealing joint strip (6) whole to be realized using rubber material.

Technical field

The invention belongs to core industry and other industry technical field of nondestructive testing, and in particular to a kind of great-leap-forward sealing knot Structure.

Background technique

Nuclear power station has the pipeline of many vertical top cecums, and outer dia is in up big and down small special shape, and Lower small diameter section is provided with butt weld.

For the core first-order weld of nuclear power station, code requirement need to carry out surface and volume inspection, and above-mentioned weld seam is only capable of from outer Portion is checked close to implementation, and fluid coupling ultrasonic examination and water-washing type liquid need to be generally used for existing detection method Penetration inspection.Therefore just it is faced with the problem of sealing and collection for checking liquid used.

The present invention solves the sealing problem that lower small diameter pipeline section is realized across major diameter pipeline section aiming at the demand.

Summary of the invention

Present invention aim to address the sealing problems that lower small diameter pipeline section is realized across major diameter pipeline section, provide one Kind great-leap-forward sealing structure.

The present invention is implemented as follows:

A kind of great-leap-forward sealing structure, including liquid collecting container and rack, drop bar, sealing joint strip, sealing driving Cylinder and emergency Return spring；Liquid collecting container and rack play carrying, and undertake liquid is collected, detected object is axial, The purposes that circumferential initial position determines；Sealing driving cylinder is fixed on the lower end of liquid collecting container and rack, close for driving It is radially movable to seal slide plate；Drop bar is located at the lower section of liquid collecting container and rack, is fixed on sealing driving cylinder cylinder The inside of bar, for driving sealing joint strip radially movable；Sealing joint strip is fixed on the inside of drop bar, for realizing with by Examine the sealing between pipeline external path seal section, liquid collecting container and rack；One end of emergency Return spring and sealing are driven It takes offence the cylinder body connection of cylinder, the end face outside of the other end and drop bar connects, in case of emergency by drop bar edge Radially outward layback goes out.

The hollow cylindrical of liquid collecting container and rack generally upper and lower opening as described above；Liquid is collected The lower part of container and rack outer wall is provided with annular connecting flange, for being fixedly connected with sealing driving cylinder；Liquid, which is collected, to be held The diameter of device and rack lower ending opening is less than upper end opening diameter, and the diameter of lower ending opening is greater than to be examined by inspection cecum pipeline The outer diameter at the above maximum gauge position in weld seam present position, it is ensured that this structure can smoothly across；In liquid collecting container and machine Frame lower ending opening position is provided with annular protrusion axially downward, realizes sealing for being fitted close with sealing joint strip.

The upper end of sealing driving as described above cylinder block part and liquid collecting container and the connecting flange of rack are solid Fixed connection；The inner side end of sealing driving cylinder cylinder rod is fixed on the outside of drop bar.

The generally fan-shaped plate of drop bar as described above, cross section is L shape, on the inner sidewall of L shape vertical edge It is disposed radially fluted, for installing sealing joint strip, is disposed radially fluted, is used on the inner sidewall of L shape horizontal edge Sealing joint strip is installed；Drop bar is close to liquid collecting container and rack lower surface along its diameter under the driving of sealing driving cylinder Sealing, resigning movement are realized to moving back and forth.

The generally hollow fanning strip of sealing joint strip as described above；Sealing joint strip sector Inner arc is mounted on drop bar In the groove of the inner sidewall of L shape horizontal edge；The Inner arc of sealing joint strip sector and radius side along the vertical direction setting upwards, Downward protrusion；The inner wall of Inner arc position protrusion is by inspection part path seal section sealing surface, for small with examining pipeline outside Diameter seal section, which is in close contact, realizes sealing；The inner wall of radial location protrusion be contiguous seal face, for adjacent sealing joint strip Realize sealing；Upward inverted "L" shape is respectively arranged with external arc intersection position in two radiuses of sealing joint strip sector to connect Section, is attached close to the end face of center of circle side by arc-shaped interconnecting piece two connecting pins；The arc-shaped interconnecting piece Inner side end is liquid collecting container sealing surface, is sealed for realizing with the outer wall of liquid collecting container and rack annular protrusion； The end face outside of the arc-shaped interconnecting piece has been disposed radially arc convex, is mounted on the inside of drop bar L shape vertical edge In the groove of wall.

As above when sealing driving cylinder is in retracted state, sealing joint strip is inscribed diameter of a circle and is greater than liquid collecting container And the diameter of bore of frame lower, it is ensured that can be smoothly across maximum more than by inspection weld seam present position by inspection cecum pipeline Outer diameter position.

The corresponding sealing driving cylinder of emergency Return spring described in two as above and slide plate sealing together, when unexpected feelings When condition occurs, by directly cutting off sealing driving cylinder pipeline, drop bar carries sealing joint strip in the work of emergency Return spring With lower recycling, enable the safe escape of this structure by inspection cecum pipeline.

The invention also includes liquid delivery port, liquid delivery port is arranged on the outer wall of drop bar, for receiving liquid Collect container and machine frame inside accommodates liquid discharge.

Sealing driving cylinder, slide plate sealing together and adhesive tape sealing together as described above are one group, and two are arranged altogether It is more than group, uniformly distributed along liquid collecting container and rack connecting flange lower end.

Sealing joint strip as described above integrally uses rubber material to realize.

The beneficial effects of the present invention are:

The present invention includes that liquid collecting container and rack, drop bar, sealing joint strip, sealing driving cylinder, emergency are pulled back Spring.It is realized by shape cooperation and the deformation of sealing joint strip itself across major diameter pipeline section and realizes lower small diameter pipeline section Sealing function；For cecum pipeline at the top of up big and down small, vertical state, liquid implementation inspection, the work of maintenance activity need to be used to mention Solution is supplied.

Detailed description of the invention

Fig. 1 is a kind of main view of great-leap-forward sealing structure of the invention；

Fig. 2 is a kind of bottom view of great-leap-forward sealing structure of the invention；

Fig. 3 is a kind of structural schematic diagram of the sealing joint strip of great-leap-forward sealing structure of the invention.

Wherein: 1. by inspection cecum pipeline, and 2. by inspection weld seam present position, 3. examining pipelines outside path seal section, 4. liquid Body collection vessel and rack, 5. drop bars, 6. sealing joint strips, 7. sealing driving cylinders, 8. emergency Return springs, 9. liquid discharges The mouth of a river, 10. liquid collecting container sealing surfaces, 11. contiguous seal faces, 12. by inspection part path seal section sealing surface.

Specific embodiment

The present invention is described further with reference to the accompanying drawings and examples.

As depicted in figs. 1 and 2, a kind of great-leap-forward sealing structure, including liquid collecting container and rack 4, drop bar 5, Sealing joint strip 6, sealing driving cylinder 7 and emergency Return spring 8.Liquid collecting container and rack 4 play carrying, and undertake liquid The purposes that body is collected, axial, the circumferential initial position of detected object determines.Sealing driving cylinder 7 be fixed on liquid collecting container and The lower end of rack 4, for driving drop bar 5 radially movable.Drop bar 5 is located under liquid collecting container and rack 4 Side is fixed on the inside of sealing driving 7 cylinder rod of cylinder, for driving sealing joint strip 6 radially movable.Sealing joint strip 6 is fixed In the inside of drop bar 5, for realizing between examining pipeline outside path seal section, liquid collecting container and rack 4 Sealing.One end of emergency Return spring 8 is connect with the cylinder body of sealing driving cylinder 7, the end face outside of the other end and drop bar 5 Connection, in case of emergency radially layback to go out by drop bar 5.

The hollow cylindrical of liquid collecting container and the generally upper and lower opening of rack 4.Liquid collecting container and rack The lower part of 4 outer walls is provided with annular connecting flange, for being fixedly connected with sealing driving cylinder 7.Liquid collecting container and rack 4 The diameter of lower ending opening is less than upper end opening diameter, and the diameter of lower ending opening is greater than by inspection cecum pipeline 1 by inspection weld seam institute Locate 2 or more maximum gauge position of position outer diameter, it is ensured that this structure can smoothly across.Under liquid collecting container and rack 4 End opening position is provided with annular protrusion axially downward, realizes sealing for being fitted close with sealing joint strip 6.

The upper end of sealing driving 7 cylinder part of cylinder is fixedly connected with the connecting flange of liquid collecting container and rack 4.It is close The inner side end of envelope driving 7 cylinder rod of cylinder is fixed on the outside of drop bar 5.

The generally fan-shaped plate of drop bar 5, cross section is L shape, is disposed radially on the inner sidewall of L shape vertical edge It is fluted, for installing sealing joint strip 6, be disposed radially on the inner sidewall of L shape horizontal edge it is fluted, for installing sealant Item 6.Drop bar 5 is close to liquid collecting container under the driving of sealing driving cylinder 7 and 4 lower surface of rack is radially reciprocal Sealing, resigning movement are realized in movement.

As shown in figure 3, the fanning strip that sealing joint strip 6 is generally hollow.The fan-shaped Inner arc of sealing joint strip 6 is mounted on sealing and slides In the groove of the inner sidewall of 5 L shape horizontal edge of plate.The fan-shaped Inner arc of sealing joint strip 6 and radius side be arranged along the vertical direction to Upper, downward protrusion.The inner wall of Inner arc position protrusion be by inspection part path seal section sealing surface 12, for outside examining pipeline Portion's path seal section 3, which is in close contact, realizes sealing.The inner wall of radial location protrusion is contiguous seal face 11, for it is adjacent close Seal strip 6 realizes sealing.Upward fall is respectively arranged in two fan-shaped radiuses of sealing joint strip 6 and external arc intersection position L shape linkage section is attached close to the end face of center of circle side by arc-shaped interconnecting piece two connecting pins.It is described arc-shaped The inner side end of interconnecting piece is liquid collecting container sealing surface 10, for outer with 4 annular protrusion of liquid collecting container and rack Wall realizes sealing.The end face outside of the arc-shaped interconnecting piece has been disposed radially arc convex, is mounted on drop bar 5 " L " In the groove of the inner sidewall of shape vertical edge.When sealing driving cylinder 7 is in retracted state, sealing joint strip 6 is inscribed diameter of a circle and answers Greater than the diameter of bore of 4 lower part of liquid collecting container and rack, it is ensured that can smoothly across by inspection cecum pipeline 1 by inspection weld seam The maximum outer diameter position in 2 or more present position.

Preferably, as shown in Fig. 2, this structure further includes liquid delivery port 9, drop bar 5 is arranged in liquid delivery port 9 On outer wall, for liquid collecting container and a certain amount of liquid of 4 inner containment of rack to be discharged.

In the present embodiment, sealing joint strip 6 is whole is realized using rubber material.

When sealing driving cylinder 7 inwardly squeezes, drop bar 5 carries sealing joint strip 6 and synchronizes inside movement, until being adjacent to Path seal section 3 outside examining pipeline；At this time sealing joint strip 6 by inspection part path seal section sealing surface 12 and examining pipeline outside Path seal section 3 fits closely realization sealing；The liquid collecting container sealing surface 10 and liquid collecting container and machine of sealing joint strip 6 The outer circle of 4 lower step section of frame fits closely realization sealing；Be pressurized close patch between the contiguous seal face 11 of adjacent seals adhesive tape 6 It closes and realizes sealing；To realize all sealing surfaces between liquid collecting container and rack 4 and examining pipeline outside path seal section 3 Sealing.

7 stroke of cylinder and other factors are driven according to by inspection 1 periphery situation of cecum pipeline and sealing, it can be by drop bar 5 And sealing joint strip 6 is set as N number of, restrictive condition are as follows:

1. diameter of a circle, which is inscribed, in sealing joint strip 6 should be greater than liquid collecting container and rack when sealing driving cylinder 7 is withdrawn The diameter of bore of 4 lower parts, it is ensured that can smoothly across by inspection cecum pipeline 1 by inspection the maximum outer diameter position in 2 or more position；

2. sealing joint strip 6 is constituted one by inspection part path seal section sealing surface 12 when sealing driving cylinder 7 inwardly squeezes A full circle simultaneously fits closely realization sealing with path seal section 3 outside examining pipeline；The liquid collecting container of sealing joint strip 6 seals Face 10 constitutes a full circle and fits closely realization sealing with the outer circle of 4 lower step section of liquid collecting container and rack；And phase It is pressurized between the contiguous seal face 11 of adjacent sealing joint strip 6 and fits closely realization sealing.

Two emergency Return springs 8 when the unexpected happens can for a sealing driving cylinder 7 and drop bar 5 By directly cutting off sealing driving 7 pipeline of cylinder, drop bar 5 carries sealing joint strip 6 and returns under the action of meeting an urgent need Return spring 8 It receives, enables the safe escape of this structure by inspection cecum pipeline 1.

After realizing sealing, liquid collecting container and a certain amount of liquid of 4 inner containment of rack, and internal liquid can be passed through Liquid delivery port 9 is discharged.

When sealing driving cylinder 7 is withdrawn, drop bar 5 carries sealing joint strip 6 and is moved to outermost end the present invention, this is tied Structure is by, by inspection 2 or more maximum gauge position of position, being reached maintenance position, sealing driving cylinder 7 is inside by inspection cecum pipeline 1 When extruding, drop bar 5 carries sealing joint strip 6 and synchronizes inside movement, and sealing joint strip 6, which is pressurized, realizes that path is close outside examining pipeline Envelope section 3 seals between the outer circle and adjacent seals adhesive tape 6 of 4 lower step section of liquid collecting container and rack, makes sealing structure Completely, reach sealing purpose.The present invention includes liquid collecting container and rack, drop bar, sealing joint strip, sealing driving gas Cylinder, emergency Return spring.It is realized by shape cooperation and the deformation of sealing joint strip itself across major diameter pipeline section and realizes lower part The sealing function of minor diameter pipeline section；For cecum pipeline at the top of up big and down small, vertical state, liquid need to be used to implement to check, repair The work of operation provides solution.