CN218894854U

CN218894854U - Hydrogen leakage plugging tool for outlet box bolt

Info

Publication number: CN218894854U
Application number: CN202223135601.2U
Authority: CN
Inventors: 陈建斌; 杨文杰; 陈东波
Original assignee: Zhanjiang Zhongyue Energy Co ltd
Current assignee: Zhanjiang Zhongyue Energy Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-04-21
Anticipated expiration: 2032-11-24

Abstract

The utility model discloses a hydrogen leakage plugging tool at a wire outlet box bolt, which comprises a base, a generator wire outlet box and a plugging structure, wherein an extended supporting surface is arranged below the base, the generator wire outlet box is fixedly arranged at the bottom surface of the base through a plurality of mounting bolts, a gap is arranged between the mounting bolts and the supporting surface, the plugging structure is positioned between the supporting surface and the mounting bolts, the top of the plugging structure is contacted with the bottom of the generator wire outlet box, the bottom of the plugging structure is contacted with the upper surface of the supporting surface, the plugging structure is positioned at the outer part of the mounting bolts, and the plugging structure comprises a plugging outer cover, a sealing gasket and an abutting bolt. The utility model has simple structure, lower production cost and convenient installation work, can solve the problem of hydrogen leakage of the installation bolt of the generator outlet box in the running process of the generator, does not need to detach the installation bolt, ensures the safety, has lower potential safety hazard and higher practicability.

Description

Hydrogen leakage plugging tool for outlet box bolt

Technical Field

The utility model relates to the field of hydrogen leakage stoppage, in particular to a hydrogen leakage stoppage tool at a bolt of an outlet box.

Background

The generator with the model QFSN-600-2YHG is a three-phase alternating current non-salient pole synchronous steam turbine generator produced by a Harbin electric motor plant, which is called as Harbin electric motor plant for short, the cooling mode is water-hydrogen, the capacity is increased to 630MW in 2017, and the operation rated pressure of a hydrogen system is increased to 0.42MPa.

After the generator is started up in 2021 and 2 months and 23 days, the hydrogen leakage amount of the generator is increased to about 22m3/24h and is larger than the qualified value of 16m3/24h, the hydrogen leakage amount is unqualified, the hydrogen leakage is detected by using soapy water, and three leakage points are found at the mounting bolts of the generator outlet box.

The 630MW generator produced by the haelectro is characterized in that an outlet box is connected with a base, the outlet box is fastened through 88 bolts, 6 glue injection holes are formed, under normal conditions, the glue injected into a sealing groove of the outlet box through the glue injection holes can form a circle of sealing, hydrogen is prevented from leaking through a joint surface between the base of the generator and the outlet box and the bolts, but due to the fact that the glue at the outlet box is aged and hardened through the time, new glue cannot be injected into the glue injection holes, the sealing performance of the old glue is poor, the hydrogen leaks at the joint surface of the outlet box or the bolts, the joint surface of the outlet box is free from leakage through inspection by a hydrogen leak detector and soapy water, and leakage points are at the mounting bolts.

Aiming at the hydrogen leakage problem, under the condition of unit operation, a plugging tool needs to be developed, and plugging is carried out when the unit is operated.

Disclosure of Invention

The utility model aims to provide a leakage blocking tool for a wire outlet box bolt, which is used for solving the problems that a wire outlet box of a 630MW generator produced by haunch is connected with a base, the wire outlet box is fastened through 88 bolts, 6 glue injection holes are formed, under normal conditions, the sealing glue injected into a wire outlet box sealing groove through the glue injection holes can form a circle of sealing to prevent hydrogen from leaking through a joint surface between the generator base and the wire outlet box and the bolts, but the sealing glue at the wire outlet box can age and harden due to the time lapse, new sealing glue cannot be injected into the glue injection holes, the sealing performance of the old sealing glue is poor, the hydrogen leaks at the joint surface of the wire outlet box or the bolts, and the joint surface of the wire outlet box is free from leakage and leakage points are arranged at the mounting bolts through the inspection of a hydrogen leakage detector and soapy water.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a leaking stoppage instrument of outlet box bolt department hydrogen leakage, includes base, generator outlet box and leaking stoppage structure, the below department of base is provided with the holding surface that extends, generator outlet box is through a plurality of mounting bolt fixed mounting in the bottom surface department of base, just be equipped with the space between mounting bolt and the holding surface, leaking stoppage structure is located between holding surface and the mounting bolt, just leaking stoppage structure's top and the bottom department contact of generator outlet box, leaking stoppage structure's bottom and holding surface upper surface department contact, leaking stoppage structure is located the outside department of one of them mounting bolt.

Preferably, the plugging structure comprises a plugging outer cover, a sealing gasket and a butt bolt, wherein a groove with the size larger than that of the mounting bolt is formed in the plugging outer cover, a thread groove extending into the plugging outer cover is formed in the bottom of the plugging outer cover, the sealing gasket is annular, the sealing gasket is attached to the bottom of the generator outlet box and is fixed to the periphery of the mounting bolt, the butt bolt is in threaded connection with the thread groove, the top of the plugging outer cover is attached to the sealing gasket in a butt joint mode, and the bottom of the butt bolt is attached to the supporting surface in a butt joint mode.

Preferably, the lost circulation housing is made of a material including but not limited to steel, and the lost circulation housing is subjected to an anti-rust treatment.

Preferably, the gasket is made of a material including, but not limited to, fluororubber.

Preferably, the inner ring size of the sealing gasket is larger than the size of the mounting bolt but smaller than the size of the plugging outer cover, and the outer ring size of the sealing gasket is larger than the size of the plugging outer cover.

The utility model provides a hydrogen leakage blocking tool at a bolt of an outlet box, which has the following beneficial effects:

(1) According to the utility model, the leakage stopping structure is arranged, so that after the leakage condition occurs at the mounting bolt, the sealing gasket can be fixedly attached to the outside of the leaked mounting bolt, then the top groove of the leakage stopping outer cover is aligned to the mounting bolt, the groove opening of the leakage stopping outer cover is aligned to the sealing gasket, the sealing gasket is abutted with the sealing gasket, the mounting bolt is covered, and finally the tool is used for adjusting and rotating the abutting bolt until the bottom of the abutting bolt is abutted with the supporting surface, so that the leakage stopping outer cover can be pressed below the sealing gasket to form sealing, and the leakage stopping treatment is effectively carried out on the position of the leaked mounting bolt.

(2) The utility model has the advantages of simple structure, lower production cost, convenient installation and operation, time and labor saving in plugging work, higher efficiency, capability of treating the problem of hydrogen leakage at the installation bolt of the generator outlet box in the running process of the generator, no need of disassembling the installation bolt, and lower potential safety hazard.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the gasket of the present utility model in a bottom view;

FIG. 3 is a schematic top view of a plugging housing according to the present utility model;

fig. 4 is a schematic view showing the bottom view structure of the plugging housing of the present utility model.

In the figure: 1. a base; 2. a generator outlet box; 3. a support surface; 4. installing a bolt; 5. a plugging outer cover; 6. a sealing gasket; 7. abutting the bolt; 8. a groove; 9. a thread groove.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

As shown in fig. 1-4, the present utility model provides a technical solution: the utility model provides a leaking stoppage instrument of outlet box bolt department hydrogen leakage, includes base 1, generator outlet box 2 and leaking stoppage structure, the below department of base 1 is provided with the holding surface 3 that extends, generator outlet box 2 is through the bottom surface department of a plurality of mounting bolts 4 fixed mounting in base 1, just be equipped with the space between mounting bolt 4 and the holding surface 3, leaking stoppage structure is located between holding surface 3 and mounting bolt 4, just the top of leaking stoppage structure and the bottom department contact of generator outlet box 2, the bottom of leaking stoppage structure and the contact of holding surface 3 upper surface department, leaking stoppage structure is located the outside department of one of them mounting bolt 4.

The plugging structure comprises a plugging outer cover 5, a sealing gasket 6 and an abutting bolt 7, wherein a groove 8 with the size larger than that of a mounting bolt 4 is formed in the plugging outer cover 5, a threaded groove 9 extending into the interior of the plugging outer cover 5 is formed in the bottom of the plugging outer cover 5, the sealing gasket 6 is annular, the sealing gasket 6 is fixedly attached to the bottom of a generator outlet box 2, the sealing gasket 6 is positioned at the periphery of the mounting bolt 4, the abutting bolt 7 is in threaded connection with the threaded groove 9, the top of the plugging outer cover 5 is attached to and abutted against the sealing gasket 6, the bottom of the abutting bolt 7 is attached to and abutted against a supporting surface 3, after the leakage condition of the mounting bolt 4 at the bottom of the generator outlet box 2 is detected on site, the sealing gasket 6 can be attached to the bottom of the generator outlet box 2 outside the leaked mounting bolt 4, then the abutting bolt 7 is in threaded connection with the threaded groove 9, the top groove 8 of the plugging outer cover 5 is aligned with the mounting bolt 4, the opening of the sealing gasket 6 is aligned with the sealing gasket 6, the sealing gasket 6 is enabled to be in threaded connection with the threaded groove 9, and finally the sealing gasket 7 is tightly pressed against the supporting surface 3 until the bottom of the plugging outer cover is tightly pressed against the sealing cover 3 by the supporting surface 3;

the plugging outer cover 5 is made of steel materials, and the plugging outer cover 5 is subjected to rust prevention treatment, so that the plugging outer cover 5 is not easy to deform and damage and is not easy to be damaged by damp and rust;

the gasket 6 is made of materials including but not limited to fluororubber, which has excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance, and prolongs the service life of the gasket 6;

the inner ring size of the sealing gasket 6 is larger than the size of the mounting bolt 4 but smaller than the size of the plugging outer cover 5, and the outer ring size of the sealing gasket 6 is larger than the size of the plugging outer cover 5, so that the sealing gasket 6 can be matched with the plugging outer cover 5 to perform sealing plugging treatment on the mounting bolt 4.

Working principle: after the leakage condition of the installation bolt 4 at the bottom of the generator outlet box 2 is surveyed on site, the sealing gasket 6 can be attached and fixed to the bottom of the generator outlet box 2 outside the leaked installation bolt 4, then the abutting bolt 7 is in threaded connection with the threaded groove 9, the top groove 8 of the plugging outer cover 5 is aligned with the installation bolt 4, meanwhile, the opening of the groove 8 is aligned with the sealing gasket 6, the sealing gasket 6 is abutted to the sealing gasket 6, the installation bolt 4 is covered, finally, the abutting bolt 7 is adjusted and rotated by using a tool according to actual conditions until the bottom of the abutting bolt 7 abuts against the supporting surface 3, namely, the plugging outer cover 5 is pressed to the position below the sealing gasket 6 through the reverse acting force formed by the abutting bolt 7 and the supporting surface 3 to form sealing, so that the leaking hydrogen leakage problem of the installation bolt 4 of the leakage outlet box 2 can be effectively treated in the running process of the generator without disassembling the installation bolt 4, the safety is guaranteed, and the potential safety hazard is low, and the whole practicability is high.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is merely for convenience in describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and defined otherwise, for example, it may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a leak stopping instrument of outlet box bolt department hydrogen leakage, includes base (1), generator outlet box (2) and leaking stoppage structure, its characterized in that: the utility model discloses a generator is characterized by comprising a base (1), a plurality of mounting bolts (4), a generator outlet box (2), a support surface (3) and a plugging structure, wherein the lower part of the base (1) is provided with an extended support surface (3), the generator outlet box (2) is fixedly mounted on the bottom surface of the base (1) through the plurality of mounting bolts (4), a gap is arranged between the mounting bolts (4) and the support surface (3), the plugging structure is positioned between the support surface (3) and the mounting bolts (4), the top of the plugging structure is contacted with the bottom of the generator outlet box (2), the bottom of the plugging structure is contacted with the upper surface of the support surface (3), and the plugging structure is positioned at the outer part of one of the mounting bolts (4).

2. The tool for leaking stoppage of hydrogen at a bolt of a wire outlet box according to claim 1, wherein: the utility model provides a leak stopping structure includes leaking stoppage dustcoat (5), sealed pad (6) and butt bolt (7), recess (8) that the size is greater than installation bolt (4) are seted up to the inside of leaking stoppage dustcoat (5), screw thread groove (9) in extending to its inside are seted up to the bottom department of leaking stoppage dustcoat (5), sealed pad (6) are annular, sealed pad (6) laminating is fixed in the bottom department of generator outlet box (2), just sealed pad (6) are located the department all around of installation bolt (4), butt bolt (7) and screw thread groove (9) threaded connection, the top and sealed pad (6) laminating butt of leaking stoppage dustcoat (5), the bottom and the supporting surface (3) laminating butt of butt bolt (7).

3. The tool for leaking stoppage of hydrogen at the outlet box bolt according to claim 2, wherein: the plugging cover (5) is made of steel materials, and the plugging cover (5) is subjected to rust-proof treatment.

4. The tool for leaking stoppage of hydrogen at the outlet box bolt according to claim 2, wherein: the gasket (6) is made of materials including but not limited to fluororubber.

5. The tool for leaking stoppage of hydrogen at the outlet box bolt according to claim 2, wherein: the inner ring size of the sealing gasket (6) is larger than the size of the mounting bolt (4) but smaller than the size of the plugging outer cover (5), and the outer ring size of the sealing gasket (6) is larger than the size of the plugging outer cover (5).