CN217451145U - Cleaning tool with built-in sealing nut - Google Patents

Abstract

The utility model belongs to the technical field of nuclear power station nuclear island equipment gate overhauls, concretely relates to built-in gland nut burnisher. The utility model discloses a stock, lock nut, clean module, clean dog, stock are square pole, and clean nut opens and has the trapezoidal thread with sealing screw matched with, and open at the clean module center has square locating hole, and square pole and square locating hole cooperation have evenly seted up 3 horizontal collecting vat in clean module axial, and horizontal collecting vat is less than at the bottom of the clean module screw thread tooth, and clean dog passes through clean dog fastening screw to be fixed on the trapezoidal thread of clean module. The utility model provides a problem and the hidden danger that exist among the clean repair process of equipment gate sealing mechanism gland nut current mode improve the clean repair gland nut's of operation personnel security and reliability, avoid the operation in-process to take place industrial safety and human error incident and delay the whole overhaul time limit for a project of unit even.

Description

Cleaning tool with built-in sealing nut

Technical Field

The utility model belongs to the technical field of nuclear power station nuclear island equipment gate overhauls, concretely relates to built-in gland nut burnisher.

Background

The first-stage project of the nuclear power station consists of two WWER-1000 pressurized water reactor units, and each unit reactor building is provided with an equipment transportation gate (equipment gate). And the equipment gate is installed and located on the embedded part of the reactor concrete containment. The equipment gate main body is of a cylindrical isolation room structure and is provided with two closable gates, and a nuclear reactor plant of the nuclear power station is divided into a sealing area and a non-sealing area. The equipment gate and the reactor building containment vessel are the last barrier for ensuring the radioactive substances in the reactor building to escape, and once the equipment gate or the reactor building containment vessel is damaged and fails to cause the failure of the sealing function, the radioactive substances escape under the accident condition, so that the unsustainable degree and consequence are caused.

During the construction of a nuclear power plant, all installed equipment of the reactor plant is transported into the reactor plant (e.g., reactor pressure vessel, reactor containment tube assembly, reactor core basket, reactor upper assembly, steam generator, etc.) through the embedment of the equipment gates. After the equipment gate body is installed, namely during the normal operation of the unit and during the overhaul of the unit, the equipment gate mainly transports materials, spare parts, equipment to be overhauled and the like required by the reactor unit during the shutdown overhaul, and can pass through smaller parts of the equipment gate (such as new fuel arranged in a cladding, spent fuel arranged in a transport box, radioactive waste arranged in the transport box, and auxiliary tools for transporting, technically maintaining and repairing process equipment).

On the door frame of the inner and outer door of the lock there are 3 drive mechanisms for moving the door leaf and on the door leaf there are 6 sealing mechanisms for sealing the lock (see fig. 1). The sealing mechanism mainly has the advantages that when the door leaf moves to a position parallel to a gate hole of the gate, the gate sealing mechanism is switched on and starts to act, the electric head 1 rotates to drive the sealing nut 3 in the sealing mechanism shell 2, the sealing nut 3 is screwed to the sealing screw rod 5 fixed on the gate cylinder door frame 4 to the bottom, the door leaf is in contact sealing with the gate cylinder door frame, the pressure regulating valve is triggered to act, the cylindrical isolation space of the gate is inflated to a fixed value, and the gate sealing is completed.

During the normal operation of the reactor unit, the inner door and the outer door of the gate of the equipment are required to be in a normal closing and sealing working condition according to an operation specification, and the two doors in the working condition need to ensure the positive pressure sealing of the cabin between the cylindrical partitions of the gate. During the shutdown maintenance of the reactor unit, the equipment gate has two working conditions, one is that when the temperature of a reactor primary loop is lower than 150 ℃, the inner door and the outer door of the equipment gate are in an open (double-open) state, and at the moment, the equipment gate does not need to be operated. The other is that when the unit is split to the period that the temperature of a reactor loop is reduced to 150 ℃ and maintenance, cold shutdown, stacking and material changing are carried out, at the moment, the equipment gate needs to ensure the closing and sealing (single opening state) of at least one door, in the period, in order to smoothly carry out unit overhaul according to a plan, smaller items such as materials, consumables, auxiliary tools and the like required by a unit overhaul reactor factory building project need to be transported to the reactor factory building through the equipment gate transport trolley, in the period, the equipment gate is the most frequent opening and closing stage in the whole overhaul process, as the equipment gate is frequently opened and closed, the sealing nut 3 and the sealing screw 5 on the gate sealing mechanism (shown in figure 1) are in an overload working state, the sealing nut 3 and the sealing screw 5 adopt trapezoidal threads, even if lubricating grease is coated on the thread part, the frequent connection is difficult to avoid the damage of the threads in different degrees, the main damage is the undercut of gland nut 3 and 5 screw thread parts of sealing screw, and after the screw thread undercut damage, have metal iron to cut and drop to in the screw thread crest clearance gap, cause the jam of gland nut 3 and sealing screw 5, lead to the screw thread to sting even, influence the normal switch of equipment gate, make the normal transportation function of equipment gate temporary or the inefficacy of overlength time, postpone the whole project period of unit overhaul.

The sealing screw 5 is convenient and quick to clean and repair because of the external thread. The sealing nut 3 is installed and fixed in the sealing mechanism shell 2, so that cleaning and repairing of a thread part are inconvenient, a steel wire brush is used for cleaning the thread of the sealing nut 3 in a common method, and due to the position limitation of the sealing nut 3 and the improper cleaning method, the cleaning effect is not ideal, and the problem of cleaning the thread of the sealing nut 3 cannot be solved fundamentally. If the sealing nut 3 is detached, cleaned and repaired, an operation platform needs to be erected below the corresponding sealing mechanism, the sealing mechanism shell 2 is detached, then the transmission part of the electric head 1 is detached, and the sealing nut 3 is taken out to be repaired and cleaned. Obviously, the dismounting cleaning repair period of the sealing nut 3 is long, and if the sealing nuts 3 are dismounted to clean and repair when a plurality of sealing mechanisms are jammed, the workload is very large, and the scheduled overhaul period of the unit is correspondingly prolonged.

In summary, the following hidden troubles exist in the cleaning and repairing method of disassembling the sealing mechanism or not disassembling: 1. the threads are cleaned by using the steel wire brush, the cleaning is not thorough enough, the risk of seizure during the operation of the sealing nut 3 and the sealing screw 5 cannot be fundamentally eliminated, and if the threads are cleaned by using an inferior steel wire cleaning tool, the risk that steel wires fall off and fall into the sealing nut 3 also exists; 2. the disassembly and disassembly sealing mechanism cleans and repairs damaged threads, the construction period is long, and the disassembly and disassembly also has industrial safety risks, so that the overall overhaul construction period of the unit is influenced;

in order to solve the problems and potential safety hazards, improve the efficiency and safety of cleaning and repairing the gland nut 3, reduce the risk of operating personnel and delay the overhaul period of the unit, a safer, more reliable and more efficient cleaning tool with built-in gland nuts and a cleaning method are urgently needed.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is that,

according to the characteristics of the transportation task of the equipment gate in the unit overhaul, the practical requirement of repairing the sealing nut of the sealing mechanism of the equipment gate is combined, the cleaning tool with the built-in sealing nut is provided, the problems and hidden dangers existing in the existing cleaning and repairing process of the sealing nut of the sealing mechanism of the equipment gate are solved, the safety and reliability of the cleaning and repairing of the sealing nut of an operator are improved, and the industrial safety and the human error event and even the whole overhaul period of the unit are prevented from being delayed in the operation process.

The utility model adopts the technical proposal that:

the utility model provides a built-in gland nut burnisher, includes stock, lock nut, clean module, clean dog, the stock is square pole, clean nut opens and has the trapezoidal thread with sealing screw matched with, it has square locating hole to open at the clean module center, square pole and the cooperation of square locating hole, evenly seted up 3 horizontal collecting vat at clean module axial, horizontal collecting vat is less than at the bottom of the clean module screw thread tooth, clean dog passes through clean dog fastening screw to be fixed on clean module's trapezoidal thread.

One end of the long rod is a triangular clamping head, and the other end of the long rod is a square rod.

The crest of the trapezoidal thread of the cleaning module is slightly lower than the crest of the trapezoidal screw of the sealing screw.

One end of the cleaning module is provided with an end face positioning plate, one end of the square rod is fixed through the end face positioning plate, the other end of the cleaning module is provided with a locking nut, and the other end of the square rod is fixed with the cleaning module through the locking nut; a pressing flat gasket is arranged between the locking nut and the cleaning module.

And a cleaning stop block is arranged at the top of the thread at one end of the transverse collecting groove.

The height of the cleaning block is the distance of the crest clearance.

When the cleaning module rotates to enter the sealing nut, the sealing nut is not cleaned, the cleaning module rotates anticlockwise to withdraw the sealing nut, and the cleaning stop block arranged at the top of the trapezoidal thread end face on one side of the transverse collecting groove scrapes and pushes foreign matters in the sealing nut into the transverse collecting groove.

And (3) clamping the triangular clamping head by using a pistol drill or a straight grinding machine, driving the long rod to rotate and driving the cleaning module to rotate.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) according to the actual situation on site, aiming at the problems and hidden dangers existing in the operation and maintenance processes of the sealing mechanism of the equipment gate, the utility model provides a safe, reliable and brand-new cleaning tool and cleaning method for the built-in sealing nut;

(2) the utility model provides a built-in seal nut cleaning tool, which fully considers the built-in characteristics of the seal nut, designs a long rod, connects a cleaning module on the long rod, and can easily clean the built-in nut screw thread through a pistol drill or a straight grinding machine;

(3) the cleaning module is designed into a thread shape with the same pitch as the built-in nut, so that the stability is improved, the cleaning effect is improved, and the cleaning speed is improved;

(4) the utility model provides a built-in gland nut burnisher, set up the collecting vat on cleaning module screw thread is horizontal, the collecting vat is lower than cleaning module screw thread tooth bottom, can be effectual with the foreign matter in the screw thread, especially metal iron cutting, the effective collection in the groove, and guarantee that cleaning module withdraws from gland nut before metal iron cutting can not drop and get into gland nut again;

(5) the utility model provides a built-in gland nut cleaning tool, design into one end with the horizontal collecting vat of cleaning module and seal, the other end runs through, when cleaning module gets into gland nut, the cleaning dog does not work, only plays the roll foreign matter function when cleaning module withdraws from, horizontal collecting vat rear end seals can effectually block getting into the drop of the foreign matter in the collecting vat;

(6) the utility model provides a pair of built-in gland nut burnisher designs clean dog on the one end screw thread of clean module screw thread transverse groove, and trapezoidal thread's crest clearance has been eliminated to clean dog, can be effectual with the foreign matter of internal thread bottom roll-over to the transverse collecting inslot, fundamentally solves the clean problem of sealing thread.

Drawings

FIG. 1 is a schematic view of a sealing mechanism with a sealing nut inside;

FIG. 2 is a schematic view of a cleaning tool with a built-in seal nut according to the present invention;

FIG. 3 is an enlarged view of a portion A-A of FIG. 2;

in the figure: the device comprises a 1-electric head, a 2-sealing mechanism shell, a 3-sealing nut, a 4-gate cylinder door frame, a 5-sealing screw, a 6-triangular clamping head, a 7-long rod, a 8-locking nut, a 9-flat gasket, a 10-cleaning module, a 11-transverse collecting tank, a 12-cleaning stop block, a 13-cleaning stop block fastening screw, a 14-end face positioning plate and a 15-square positioning hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 2 and fig. 3, the utility model provides a built-in gland nut cleaning tool, including stock 7, lock nut 8, cleaning module 10, clean dog 12, stock 7 designs the actual conditions that has fully considered the gland nut 3 to be built-in, and one end is equipped with the design of triangle clamp head 6, and triangle clamp head 6 centre gripping is tighter, drops down and is difficult for relaxing, uses more reliably, and the other end is the square pole; the cleaning nut 10 and the sealing screw rod 5 are designed by adopting trapezoidal threads, in order to prevent the cleaning module 10 from being jammed and jammed in the using process, the tooth top of the trapezoidal threads of the cleaning module 10 is designed to be slightly lower than the tooth top of the trapezoidal screw rod of the sealing screw rod 5, so that the cleaning nut 10 cleans the sealing nut 8 to avoid the jamming, jamming and the like, a square positioning hole 15 is formed in the center of the cleaning module 10, a square rod is matched with the square positioning hole 15, an end face positioning plate 14 is arranged at one end of the cleaning module 10, one end of the square rod is fixed through the end face positioning plate 14, a locking nut 8 is arranged at the other end of the cleaning module 10, and the other end of the square rod is fixed with the cleaning module 10 through the locking nut 8; a pressing flat gasket 9 is arranged between the locking nut 8 and the cleaning module 10,

3 transverse collecting grooves 11 are uniformly formed in the axial direction of the cleaning module 10, the transverse collecting grooves 11 are lower than the thread roots of the cleaning module 10, the cleaning stop block 12 is a core component of the cleaning tool with the built-in seal nut and is fixed on the trapezoidal thread of the cleaning module 10 through a cleaning stop block fastening screw 13, and the cleaning stop block 12 is only installed at the top of one end thread of the transverse collecting grooves 11 and is mainly designed to reduce the resistance of the cleaning module 10 when the cleaning module enters the seal nut 3.

Sealing nut is not cleaned when cleaning module rotation gets into sealing nut 3, cleaning module 10 anticlockwise rotation withdraws from sealing nut 8, install in transverse collecting groove 11 one side trapezoidal thread terminal surface top clean dog 12 scrape the foreign matter in the sealing nut and push away in transverse collecting groove 11, because transverse collecting groove 11 is less than the thread root of cleaning module 10, scrape the foreign matter that pushes away by clean dog 12 and be difficult for reentrant sealing nut screw thread behind being collected in transverse collecting groove 11, transverse collecting groove 11 remains at least one tooth to detain near three holding head 6 one side simultaneously and has not opened, also guaranteed to a great extent when the foreign matter gets into transverse collecting groove 11 can not drop from three holding head 6 one sides.

The clean dog is mainly in order to eliminate the crest clearance of trapezoidal thread internal thread and external screw thread, namely in order to eliminate the crest clearance of clean module 10 and 3 internal and external screw threads of gland nut, when clean module 10 entered into gland nut 3, because trapezoidal thread has certain crest clearance when cooperating with gland nut 3, the cooperation that leans on internal and external screw thread alone can not reach clean internal thread's purpose, if want to reach clean gland nut's purpose, at first need eliminate the crest clearance of internal and external screw thread, clean dog 12 has increased the height when the design, the height that increases is exactly the distance in crest clearance, perfect elimination crest clearance, reach clean gland nut internal thread's purpose.

The pistol drill or the straight grinding machine is used for clamping the triangular clamping head 6, the long rod 7 is driven to rotate, the cleaning module 10 is driven to rotate, in the rotating process of the cleaning module, the cleaning stop block 12 pushes and rolls foreign matters in the internal thread of the sealing nut and collects the foreign matters in the transverse collecting groove 11, and the cleaning of the sealing nut is completed.

The long rod 7 is a main body support of the cleaning tool with the built-in sealing nut, the built-in structure and the characteristics of the sealing nut 3 are mainly considered, and the long rod 7 can be used for cleaning the internal thread of the gate sealing mechanism of the device (shown in figure 1) without disassembling the gate sealing mechanism.

The lock nut 8 functions primarily to secure and lock the cleaning module 10 to the wand 7 by pressing against the flat washer 9 in order to prevent play of the cleaning module 10 on the wand 7 when the cleaning module 10 is mounted on the wand 7.

And a cleaning module. The cleaning module fully considers the characteristics of trapezoidal threads of a sealing nut 3 of the equipment gate sealing mechanism (shown in figure 1), simultaneously combines the built-in actual situation of the sealing nut, considers the cleaning of the threads of the sealing nut on the premise of not disassembling the equipment gate sealing mechanism, and simultaneously can ensure the cleaning effectiveness.

The cleaning module is fixedly arranged at one end of a long rod 7 square rod through a central square hole, is driven by the long rod to rotate and enters a sealing nut thread to form meshing with the sealing nut thread.

The utility model provides a pair of built-in gland nut cleaning method, including following step:

installing the square locating hole 15 of cleaning module 10 and corresponding to 7 square pole one sides of stock, the terminal surface locating plate 14 welds in 7 square pole terminal surfaces of stock to ensure the drunkenness of cleaning module 10 one side, at 10 opposite sides installation two flat gaskets 9 of cleaning module, compress tightly fixed cleaning module 10 by the nut that lock nut 8 is close to flat gasket 9 again, two nuts of lock nut 8 lock, have guaranteed the drunkenness of cleaning module 10 opposite side.

The gun drill or the straight mill is used for clamping the triangular clamping head 6, the cleaning stop block 12 is checked to be fixed firmly, the sealing nut 3 enters the head through slow clockwise rotation, if no abnormity occurs, the sealing nut 3 exits through anticlockwise slow rotation, the cleaning stop block 12 does work at the moment, foreign matters in the sealing nut 3 are scraped and pushed, and are collected in the transverse collecting groove 11, and the cleaning work of the cleaning sealing nut 3 is completed.

The cleaning tool for the built-in seal nut is withdrawn from the seal nut 3, the collection effect of the clean foreign matters is checked, meanwhile, the surface condition of the internal thread of the seal nut 3 is checked, and the cleaning can be repeatedly carried out until the cleaning purpose is achieved.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. The utility model provides a built-in gland nut burnisher which characterized in that: including stock (7), lock nut (8), clean module (10), clean dog (12), stock (7) are the square pole, it has trapezoidal thread with sealing screw (5) matched with to open clean module (10), it has square locating hole (15) to open at clean module (10) center, the square pole cooperates with square locating hole (15), 3 horizontal collecting vat (11) have evenly been seted up in clean module (10) axial, horizontal collecting vat (11) are less than at the bottom of the screw thread of clean module (10), clean dog (12) are fixed on the trapezoidal thread of clean module (10) through clean dog fastening screw (13).

2. A built-in gland nut cleaning tool according to claim 1, wherein: one end of the long rod (7) is a triangular clamping head (6), and the other end of the long rod is a square rod.

3. The cleaning tool for a built-in gland nut according to claim 1, wherein: the tooth crest of the trapezoidal thread of the cleaning module (10) is slightly lower than the tooth crest of the trapezoidal screw of the sealing screw (5).

4. The cleaning tool for a built-in gland nut according to claim 1, wherein: one end of the cleaning module (10) is provided with an end face positioning plate (14), one end of the square rod is fixed through the end face positioning plate (14), the other end of the cleaning module (10) is provided with a locking nut (8), and the other end of the square rod is fixed with the cleaning module (10) through the locking nut (8); a compression flat gasket (9) is arranged between the locking nut (8) and the cleaning module (10).

5. The cleaning tool for a built-in gland nut according to claim 1, wherein: and a cleaning stop block (12) is arranged at the top of the thread at one end of the transverse collecting groove (11).

6. The built-in gland nut cleaning tool according to claim 5, wherein: the height of the cleaning block (12) is the distance of the crest clearance.

7. A built-in gland nut cleaning tool according to claim 6, wherein: when the cleaning module (10) rotates to enter the sealing nut (3), the sealing nut is not cleaned, the cleaning module (10) rotates anticlockwise to withdraw the sealing nut (3), and a cleaning stop block (12) arranged at the top of the trapezoidal thread end face on one side of the transverse collecting groove (11) scrapes and pushes foreign matters in the sealing nut into the transverse collecting groove (11).

8. A built-in gland nut cleaning tool according to claim 1, wherein: the triangular clamping head (6) is clamped by a pistol drill or a straight grinder, the long rod (7) is driven to rotate, and the cleaning module (10) is driven to rotate.

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