CN219300206U

CN219300206U - Connecting pipe sealing structure

Info

Publication number: CN219300206U
Application number: CN202223532354.XU
Authority: CN
Inventors: 韩杰; 孙永刚; 王鹏; 杨军; 王雷
Original assignee: Dalian Nuclear Power And Petrochemical Co ltd; China First Heavy Industries Co Ltd
Current assignee: Dalian Nuclear Power And Petrochemical Co ltd; China First Heavy Industries Co Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-07-04
Anticipated expiration: 2032-12-29

Abstract

The utility model provides a connecting pipe sealing structure, which relates to the technical field of pipe sealing and comprises a sealing cover plate, a sealing ring and a connecting piece, wherein the sealing cover plate comprises a large-diameter part and a small-diameter part, the small-diameter part is used for being inserted into a connecting pipe, the sealing ring is arranged on the small-diameter part, the sealing ring is used for being clung to the inner wall of the connecting pipe, the large-diameter part is used for being abutted to the end part of the connecting pipe, and the large-diameter part is used for being arranged on the connecting pipe through the connecting piece. Compared with a welding sealing structure and a self-tightening sealing structure, the connecting pipe sealing structure has the advantages of being more convenient to install, short in installation period, capable of avoiding damaging the inner wall of the connecting pipe in the installation process, and good in economical efficiency.

Description

Connecting pipe sealing structure

Technical Field

The utility model relates to the technical field of pipe fitting sealing, in particular to a connecting pipe sealing structure.

Background

At present, most of the sealing devices of the inlet and outlet connecting pipes of the nuclear reactor pressure vessel adopt welding sealing structures, so that the time consumption is long, the cost is high, and the welded connecting pipes are easy to deform; the small part adopts a self-tightening mechanical sealing structure, a sealing cover is required to be installed from the inside of the pressure vessel, a counterweight rod is required to be manufactured, the installation is inconvenient in a counterweight hanging mode, the installation period is long, and the risk of damaging the inner wall of the connecting pipe exists.

Disclosure of Invention

The utility model aims to solve the problems that: how to provide a take over seal structure that simple to operate just can not collide with the takeover inner wall.

The utility model provides a connecting pipe sealing structure, which comprises: the sealing cover plate comprises a large-diameter portion and a small-diameter portion, the small-diameter portion is used for being inserted into the connecting pipe, the sealing ring is installed on the small-diameter portion, the sealing ring is used for being clung to the inner wall of the connecting pipe, the large-diameter portion is used for being abutted to the end portion of the connecting pipe, and the large-diameter portion is used for being installed on the connecting pipe through the connecting piece.

Compared with the prior art, the connecting pipe sealing structure provided by the utility model has the following beneficial effects:

when the connecting pipe sealing structure is used, the small-diameter part of the sealing cover plate is inserted into the connecting pipe, the large-diameter part of the sealing cover plate is abutted against the end part of the connecting pipe, and then the large-diameter part is connected with the connecting pipe through the connecting piece, so that the sealing cover plate is arranged at the inlet or the outlet of the connecting pipe. Compared with a welding sealing structure and a self-tightening sealing structure, the connecting pipe sealing structure has the advantages of being more convenient to install, short in installation period, capable of avoiding damaging the inner wall of the connecting pipe in the installation process, and good in economical efficiency.

Optionally, a plurality of connecting holes are uniformly distributed on the large-diameter portion, and the connecting piece is used for penetrating through the connecting holes and connecting the connecting pipe so as to connect the large-diameter portion and the connecting pipe into a whole.

Optionally, the sealing structure of the connecting pipe further comprises jackscrews, wherein at least two threaded holes are uniformly distributed on the large-diameter part, and the jackscrews are used for being in threaded connection with the threaded holes so as to detach the sealing cover plate from the connecting pipe.

Optionally, an annular groove is formed in the small-diameter portion, and the sealing ring is installed in the annular groove.

Optionally, two annular grooves are spaced apart on the small diameter portion, and each annular groove is provided with the sealing ring.

Optionally, the insertion end of the small diameter portion is provided with a chamfer.

Optionally, the sealing cover plate has a step structure.

Optionally, the sealing ring is an O-shaped rubber sealing ring.

Optionally, a lifting hole is formed in the side wall of the large-diameter portion, and the sealing cover plate is transferred through the lifting hole.

Drawings

FIG. 1 is a schematic view of a sealing cover plate according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic view of a pipe connection sealing structure according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view B-B of FIG. 3;

FIG. 5 is an enlarged view of a portion of the portion I of FIG. 4;

fig. 6 is a cross-sectional view of fig. 3C-C.

Reference numerals illustrate:

1. sealing the cover plate; 11. a large diameter portion; 12. a small diameter portion; 13. a connection hole; 14. a threaded hole; 15. an annular groove; 16. lifting holes; 2. a seal ring; 3. a connecting piece; 4. a jackscrew; 5. and (5) taking over.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Moreover, in the drawings, the Z axis represents vertical, i.e., up and down, and the positive direction of the Z axis (i.e., the arrow of the Z axis points) represents up, and the negative direction of the Z axis (i.e., the direction opposite to the positive direction of the Z axis) represents down; the X-axis in the drawing represents the lateral direction, i.e., the left-right position, and the positive direction of the X-axis (i.e., the arrow of the X-axis points) represents the left, and the negative direction of the X-axis (i.e., the direction opposite to the positive direction of the X-axis) represents the right.

It should also be noted that the foregoing Z-axis and X-axis are meant to be illustrative only and to simplify the description of the present utility model, and are not meant to indicate or imply that the devices or elements referred to must be in a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

As shown in fig. 1 to 6, the nipple sealing structure of the embodiment of the present utility model includes: the sealing cover plate 1, the sealing ring 2 and the connecting piece 3, the sealing cover plate 1 comprises a large-diameter portion 11 and a small-diameter portion 12, the small-diameter portion 12 is used for being inserted into the connecting pipe 5, the sealing ring 2 is installed on the small-diameter portion 12, the sealing ring 2 is used for being clung to the inner wall of the connecting pipe 5, the large-diameter portion 11 is used for being abutted to the end portion of the connecting pipe 5, and the large-diameter portion 11 is used for being installed on the connecting pipe 5 through the connecting piece 3.

In this embodiment, as shown in fig. 1 to 6, when in use, the small diameter portion 12 of the sealing cover plate 1 is inserted into the adapter tube 5, and the large diameter portion 11 of the sealing cover plate 1 is abutted against the end of the adapter tube 5, and then the large diameter portion 11 is connected with the adapter tube 5 through the connecting piece 3, so that the sealing cover plate 1 is mounted at the inlet or outlet of the adapter tube 5, and the sealing ring 2 mounted on the small diameter portion 12 of the sealing cover plate 1 is pressed and expanded to be tightly attached to the inner wall of the adapter tube 5 in the hydraulic test process, so as to play a sealing role, and the sealing cover plate 1 is subjected to an outward force generated by the internal pressure in the hydraulic test process, because the sealing cover plate 1 is mounted on the end face of the adapter tube 5 through the connecting piece 3, the sealing cover plate 1 is subjected to an outward force generated by the internal pressure, and the resultant force (for example, the connecting piece 3 is a bolt, and the thread is connected to the end face of the adapter tube 5) can be borne by the resultant force between the connecting piece 3 and the end face of the adapter tube 5, so as to prevent the sealing cover plate 1 from being extruded. Compared with a welding sealing structure and a self-tightening sealing structure, the connecting pipe sealing structure has the advantages of being more convenient to install, short in installation period, capable of avoiding damaging the inner wall of the connecting pipe 5 in the installation process, and good in economical efficiency.

Optionally, a plurality of connecting holes 13 are uniformly distributed on the large-diameter portion 11, and the connecting piece 3 is used for penetrating through the connecting holes 13 and connecting the large-diameter portion 11 with the connecting pipe 5 to be connected into a whole.

In this embodiment, as shown in fig. 1, fig. 3 and fig. 4, a plurality of connecting holes 13 are uniformly distributed on the large diameter portion 11 of the sealing cover plate 1, wherein the connecting holes 13 may be through holes, the connecting pieces 3 may be bolts, and the connecting pieces 3 may be installed in threaded holes on the end face of the adapter tube 5 through the connecting holes 13 on the large diameter portion 11, and are uniformly screwed to perform a fixing function. The outward force generated by the internal pressure of the sealing cover plate 1 during the hydrostatic test can be borne by the resultant force of the connection piece 3 and the end face of the connecting pipe 5, so as to prevent the sealing cover plate 1 from being extruded.

Optionally, the sealing structure of the connecting pipe further comprises a jackscrew 4, at least two threaded holes 14 are uniformly distributed on the large-diameter part 11, and the jackscrew 4 is used for being in threaded connection with the threaded holes 14 so as to detach the sealing cover plate 1 from the connecting pipe 5.

In this embodiment, as shown in fig. 1, fig. 3 and fig. 6, at least two threaded holes 14 are uniformly formed in the large diameter portion 11, in the use condition of 2 threaded holes 14 in fig. 1, the jackscrew 4 is a long shaft threaded member, and is mounted in the threaded hole 14 on the large diameter portion 11 and screwed when the sealing cover plate 1 is dismounted, so that the end of the jackscrew 4 abuts against the end face of the adapter tube 5, and the large diameter portion 11 of the sealing cover plate 1 is separated from the end face of the adapter tube 5, so that the sealing cover plate 1 is dismounted.

Optionally, the small diameter portion 12 is provided with an annular groove 15, and the sealing ring 2 is mounted on the annular groove 15.

In this embodiment, as shown in fig. 2, the small diameter portion 12 of the sealing cover plate 1 is provided with an annular groove 15, and the annular groove 15 is used for installing the sealing rings 2, where a plurality of annular grooves 15 may be spaced apart, that is, each annular groove 15 is provided with a sealing ring 2, so as to ensure tightness thereof.

Alternatively, two annular grooves 15 are provided on the small diameter portion 12 at intervals, and a seal ring 2 is mounted on each annular groove 15.

In this embodiment, as shown in fig. 2, two annular grooves 15 are provided on the small diameter portion 12 (X axis direction) of the seal cover plate 1 at intervals, and the annular grooves 15 are used for mounting the seal rings 2, i.e., the tightness is ensured by the two seal rings 2.

Optionally, the insertion end of the small diameter portion 12 is chamfered.

In this embodiment, the small diameter portion 12 of the sealing cover plate 1 is used for being inserted into the adapter 5, and the insertion end of the small diameter portion 12 is provided with a chamfer, so that the small diameter portion 12 can be conveniently and rapidly inserted into the adapter 5.

Alternatively, the sealing cover plate 1 has a stepped structure.

In this embodiment, referring to fig. 2, the sealing cover plate 1 has a stepped structure, and a small diameter portion 12 and a large diameter portion 11 of the sealing cover plate 1 are sequentially arranged from left to right, wherein the large diameter portion 11 may be a flange, and the large diameter portion 11 and the small diameter portion 12 may be welded into a whole.

Optionally, the sealing ring 2 is an O-shaped rubber sealing ring.

In the embodiment, the sealing ring 2 consists of 2 nitrile rubber O-shaped sealing rings, and the O-shaped sealing rings are pressed and expanded to be tightly attached to the inner wall of the connecting pipe during the hydrostatic test, so that the sealing effect is achieved. The sealing performance is further improved by adopting two O-shaped rings for sealing, zero leakage can be achieved, and the sealing device is suitable for high-pressure static sealing.

Alternatively, the side wall of the large diameter portion 11 is provided with a lifting hole 16, and the sealing cover plate 1 is transferred through the lifting hole 16.

In this embodiment, as shown in fig. 2, a lifting hole 16 is formed at the top position (positive direction of Z axis) of the large diameter portion 11, wherein the lifting hole 16 may be a threaded hole, and the lifting hole 16 may be cooperatively connected with a crane for transferring the sealing cover plate 1.

Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.

Claims

1. A nipple sealing structure, comprising: the sealing cover plate comprises a sealing cover plate (1), a sealing ring (2) and a connecting piece (3), wherein the sealing cover plate (1) comprises a large-diameter portion (11) and a small-diameter portion (12), the small-diameter portion (12) is used for being inserted into a connecting pipe (5), the sealing ring (2) is installed on the small-diameter portion (12), the sealing ring (2) is used for being clung to the inner wall of the connecting pipe (5), the large-diameter portion (11) is used for being abutted to the end portion of the connecting pipe (5), and the large-diameter portion (11) is used for being installed on the connecting pipe (5) through the connecting piece (3).

2. The connecting pipe sealing structure according to claim 1, wherein a plurality of connecting holes (13) are uniformly distributed on the large-diameter portion (11), and the connecting piece (3) is used for penetrating through the connecting holes (13) to be connected with the connecting pipe (5) so as to connect the large-diameter portion (11) and the connecting pipe (5) into a whole.

3. The connecting pipe sealing structure according to claim 2, further comprising a jackscrew (4), wherein at least two threaded holes (14) are uniformly distributed in the large-diameter portion (11), and the jackscrew (4) is used for being in threaded connection with the threaded holes (14) so as to detach the sealing cover plate (1) from the connecting pipe (5).

4. The connecting pipe sealing structure according to claim 1, wherein the small diameter portion (12) is provided with an annular groove (15), and the sealing ring (2) is mounted in the annular groove (15).

5. The pipe connecting sealing structure according to claim 1, wherein two annular grooves (15) are formed in the small diameter portion (12) at intervals, and the sealing rings (2) are respectively mounted on each annular groove (15).

6. The nipple sealing structure according to claim 1, characterized in that the insertion end of the small diameter portion (12) is provided with a chamfer.

7. The nipple sealing structure according to claim 1, characterized in that the sealing cover plate (1) has a stepped structure.

8. The nipple sealing structure according to claim 1, characterized in that the sealing ring (2) is an O-shaped rubber sealing ring.

9. The adapter sealing structure according to any one of claims 1-8, characterized in that a lifting hole (16) is provided in a side wall of the large diameter portion (11), through which lifting hole (16) the sealing cover plate (1) is transferred.