KR100437280B1 - Electrical penetration assemblies with pressure monitoring system used of tube-lock assembly - Google Patents

Abstract

The present invention relates to an electrical through-assembly assembly applied to a nuclear power plant, water, coal-fired power plant, the present invention is to increase the ease and sealing function of the replacement of the wire assembly module providing a sealing area by a complete sealing assembly structure, All the holes in which the wire assembly module is assembled are connected to the gas leakage monitoring hole to maximize the monitoring function of gas leakage. The present invention provides an assembly of electrical through-holes with pressure monitoring.

In the present invention, the electric wire assembly assembly 50 in which the electric wire assembly module 60 is applied to the electric power of the low pressure electricity and control, the measurement electric line through the reactor concrete containment wall, the electric wire assembly The module 60 is a low pressure conductor 16 coated with an insulating film is continuous through the processing hole of the elastic sealing material 15 of the polymer material, and inserted into the stainless steel conduit 14, but the conventional Tube lock assembled in the processing hole 40 of the front plate 2 in a state of sealing the inside as a compression sealing portion (P / S) formed by repeatedly pressing the outer periphery of the stainless conduit 14 by a die It is achieved by the electrical through-assembly assembly having a pressure holding monitoring function using a tube lock assembly, characterized in that the assembly is assembled inside the assembly (61).

Description

Electrical penetration assemblies with pressure monitoring system used of tube-lock assembly

The present invention relates to an electrical through-assembly assembly that is applied to various reactor-related control, low voltage power supply, and measurement inside a reactor through a concrete containment wall of a nuclear power plant, and more specifically, an isolated sealing zone by a perfect sealing assembly structure. Increases the ease of replacement and sealing function of the wire assembly module that provides the power supply, and connects all the holes in which the wire assembly module is assembled from the outside to the gas leakage monitoring hole to maximize the gas leakage monitoring function. The present invention relates to an electrical through-assembly assembly having a pressure maintaining monitoring function using a tube lock assembly that maintains a constant pressure boundary at all times to maximize safety.

The electrical through-assembly assembly is used to pass the concrete containment wall surrounding the reactor with low voltage power supply cables, cables for control and measurement of internal equipment.

The concrete containment wall functions to separate the external environment from the internal ambient environment.

Thus, in order to operate and control the equipment in an internal contaminated environment, the electrical through-assembly assembly is essentially applied with a perfect seal inside and outside.

However, such an electrical through-assembly assembly is required to maintain a constant pressure at all times by monitoring the ease of exchange and the pressure inside, as well as maintaining a perfect sealing state to prevent leakage of the inside polluted environment to the outside.

That is, in order to prevent leakage through the opening of the concrete containment wall, an effective seal must be provided between the penetrating body and the wall, and the sealing means for installing the penetrating body in the concrete containment wall is installed to check and the surrounding environment of the containment wall. Seals from the sides shall be maintained and means should be provided for monitoring and testing the complete condition of the seals to determine the extent of leakage through the containment wall in the event of a leak in the contaminated environment.

Other attempts to develop such a sealing structure have been sought in various directions in the past, but the sealing effect was not desirable.

Thus, in recent years, the electrical through-assembly assembly in such a nuclear power plant is provided with the aforementioned low voltage power supply cable (conductor), control and measurement cable (conductor), and the conductors for the passage of cables applied inside the stainless tube. Blind flange type header plate named as main plate (front plate) is made of stainless tube assembly (wire assembly module) passed through the inside of the sealing material made of polymer material with holes. A technique of assembling and sealing by a three ferrule made of stainless steel and an assembling tube cap in an assembling hole provided in a header plate is disclosed in US Pat. No. 4,002,345.

That is, the U.S. Patent No. 4,002,345 is a seal assembly patent that continuously provides an isolated sealing zone and consists of a front ferrule, an intermediate ferrule, and a rear ferrule, and provides three sealing zones that are separated from each other.

The U.S. Patent No. 4,002,345 improves the sealing effect by overcoming the shortcomings of the prior art, but there is a problem that the disadvantages may occur in the long-term use by the compression sealing of the three ferrules, especially three of the metal material In order to maintain the perfect seal by providing a ferrule isolated sealing area by pressing, there is a disadvantage that a high degree of processing technology must be provided that the precision of the three ferrules close contact surface.

The present invention has been researched and developed to effectively solve the disadvantages of the above-described source technology,

That is, the present invention is the first of the plurality of polymer materials having different sizes excellent in radiation resistance, heat resistance, impact resistance, excellent withstand voltage characteristics, middle ferrule providing a sealing zone and airtightness in both of the middle ferrule O-rings and guide ferrules and rock ferrules provide pressure tight contact between the plural O-rings to provide a tight seal between the outer face of the stainless steel tube and the faceplate and backplate to improve the sealing effect.

Second, process the hole inside the sealing material made of high molecular material inside the stainless tube, pass the cable (conductor) into the inside, press the stainless tube to provide a sealing area, and fill the sealing area with nitrogen gas to prevent the corrosion effect It is applied to the assembly of electrical through-holes to have the function of monitoring the leakage of

Third, the crimping of the stainless steel tube, the sealing material of the polymer material, and the cable (conductor) portion passed through the sealing material was applied to the structure of the complete sealing by pressing the eight pressing dice.

In other words, the present invention relates to a middle ferrule providing a sealing zone, a plurality of front and rear o-rings for increasing the sealing effect on both sides of the middle ferrule, and the front, rear guide ferrule and front sealing of these o-rings. And wire assembly which is introduced into the outside of the nuclear power plant containment wall by applying the sealing assembly means having the function of providing a completely isolated sealing area by the tube lock assembly composed of the rear rock ferrule to the electrical penetration part assembly for the nuclear power plant. The present invention provides an electrical through-assembly assembly having a pressure maintaining monitoring function using a tube lock assembly that maximizes ease of assembly and dismantling of modules.

In addition, the present invention introduces a cable (conductor) by using a processing hole of the elastic sealing material of the polymer material inserted into the stainless steel tube of the wire assembly module and crimped by using a crimping die from the outside of the stainless steel tube. By providing a hole at a predetermined position of the stainless steel tube to match with the gas leakage monitoring hole processed in the front plate to assemble using the sealing assembly means to maximize the sealing effect between the inside and outside, as well as the wire assembly module Connect all the holes to the gas leakage monitoring hole and finally connect the gas leakage monitoring external line, and attach the pressure switch, the pressure gauge and the valve at the rear end to monitor the gas leakage. Collection of electrical through pressure monitoring function using assembly There the body to provide.

1 is a central longitudinal sectional view of an electrical through-assembly assembly incorporating the present invention, a state diagram attached to a concrete containment wall;

2 is an enlarged view of a part of the extract of FIG.

3 and 4 is an enlarged view of a part excerpt of FIG.

5 and 6 is an exploded view and exploded view of the tube lock assembly of the present invention,

Figure 7 is an enlarged view showing the installation structure of the temperature sensor of the present invention,

8 is an enlarged view of an excerpt “F” of FIG. 7;

9 is an enlarged excerpt showing an installation structure of the gas leakage monitoring system of the present invention,

Figure 10 is an enlarged view showing the installation of the branch valve applied to the present invention.

<Description of Symbols for Major Parts of Drawings>

44: temperature sensor 45: branch valve

50: electrical through-assembly assembly 60: wire assembly module

61: tube lock assembly 70: gas leakage monitoring system

Hereinafter, a configuration of a preferred embodiment will be described in detail with reference to the accompanying drawings.

That is, as shown in the accompanying drawings, Figures 1 to 10, the electrical through-assembly assembly of the present invention is denoted by 50, the electrical through-assembly assembly 50 is to the concrete wall (1) forming a part of the reactor facility Hex bolts 33 and spring washers 34 are mounted on the installed flange 3.

The electrical through-assembly assembly 50 has a front plate (2) at the left end and two reinforcing plates (6a, 6b) at the right end so that the wire assembly module (60) is a middle ferrule (2) on the front plate (2). 18) A plurality of front and rear O-rings (18a, 18b), a front and rear guide ferrules (20a, 20b) and the front and rear of the polymer material to increase the sealing effect in both of the middle ferrule, and press-close the O-rings It is secured by a tube lock assembly 61 composed of rock ferrules 19a and 19b and an assembly tube cap 17 to provide a perfect sealing area, and the wire assembly module 60 extending inside the reactor is spaced apart. It has a structure that is stably assembled through the holes machined to the reinforcing plates (6a, 6b) fixed by the retaining pipe (7) (8) and the extension bolt (9).

The rear reinforcing plate (6b) is assembled to the rear is assembled with the space maintenance pipe (7) to the extension bolt (9) assembled to the front plate (2), and the second reinforcement when the intermediate reinforcing plate (6a) is assembled After assembling the holding pipe (8) was fixed by the nut (10), it is provided with three to four extension bolts in the circumferential direction.

Assemble the " U " shaped nut 11 in the state of assembling the rear reinforcement plate 6b to the three to four extension bolts 9 assembled in the circumferential direction, and tighten the spring washer 12 and the nut 13. By sequentially assembling will have a structure to complete the assembly of the intermediate reinforcing plate (6a) and the rear reinforcing plate (6b).

In particular, the "U" shaped nut 11 is finally installed in the sleeve pipe 4 provided with the electrical through-assembly assembly 50 to the reactor concrete containment wall 1 so that there is no movement even in vibration and earthquake. It is used to securely fix the electrical through-assembly assembly 50.

The wire assembly module 60 is inserted into the elastic body 15 of the polymer material in the conduit 14 made of stainless steel on the outside and inside of the reactor, and the wire (wire) 16 through the hole processed in the longitudinal direction thereof (16) ) And the stainless steel conduit (14) is drawn in, and the conduit 14 formed by pressing both outer circumferences of the stainless steel conduit so as to have a central portion spaced at a predetermined interval using a special crimping tool (not shown) ( P / S is formed in a repetitive form with a predetermined interval to form the inner sealing region (S), as shown in Figure 2, the wire assembly module 60, the middle ferrule 18, both of the middle ferrule A plurality of front and rear O-rings (18a, 18b), the front and rear of the polymer material to pressurize and seal the O-rings by pressing outwardly between the front plate (2) and the conduit (14) to increase the sealing effect Guide ferrules (20a, 20b) and Tube lock assembly for sealing the rear rock ferrules (19a, 19b) by the inner and outer extensions of the front and rear o-rings (18a, 18b) by mutually pressing the tightening tightening by screwing the assembly tube cap (17) ( 61 to provide a perfect seal area (see FIGS. 5 and 6, partial and enlarged view "A").

The sealing zone is sequentially assembled inside the processing hole 40 in which the tube lock assembly 61 is machined in the front plate 2, the potential rocker 19a, guide ferrule 20a, middle ferrule 18 ), The rear guide ferrule (20b), the rear rock ferrule (19b) in the tapered surface of the inner machined on the front plate (2) and the assembly tube cap (17) by screwing the assembly tube cap (17) Both the front and rear rock ferrules 19a and 19b and the front and rear guide ferrules 20a and 20b are pressed in close contact with each other in a tapered portion, and are acting inwardly, and both of the middle ferrules 18 The outer circumferential surfaces of the front and rear polymer O-rings 20a of the outside are expanded by pressing a plurality of front and rear polymer O-rings 18a and 18b having different diameter sizes interposed between the front and rear guide ferrules 20a and 20b. In close contact with the inside of the processing hole 40 of the front plate 2 and at the same time the inside of the front and rear polymer O-rings 20b. The surface is extended to be in close contact with the outer circumferential surface of the conduit 14 is sealed structure, the sealing space (41) (42) in the inner ring groove (18-1) and outer ring groove (18-2) of the middle ferrule (18) ).

At this time, the front and rear guide ring grooves (18a, 18b) are formed on both sides, the front and rear of the middle ferrule 18, the guide projection ring (20c, 20d) is formed in the front and rear guide ferrules (20a, 20b) are assembled By screwing the tube cap 17 for the assembly is assembled so as to be movable slide to each other.

The middle ferrule 18 has a connecting hole 43 in the circumferential direction so that the sealing space 42 is connected to the gas leakage detecting hole 39.

The stainless steel is applied by applying the tube lock assembly 61 to which the respective ferrules 18, 19a, 19b, 20a and 20b, a plurality of front and rear polymer O-rings 18a and 18b, and a tube cap 17 for assembly are applied. The structure for sealing the outer surface of the steel conduit 14 is an important element constituting the electrical through-assembly assembly having a wire assembly for low voltage power and control and measurement.

That is, the improvement of the present invention is made in front of the processing hole 40 of the front plate 2 by screwing the assembly tube cap 17 inside the processing hole 40 machined on the front plate 2. A tube lock assembly composed of the potential rock ferrule 19a, the guide ferrule 20a, the middle ferrule 18, the rear guide ferrule 20b, and the rear rock ferrule 19b in a state where the escape from the formed conical hole is prevented ( A plurality of front and rear polymer O-rings 18a having different diameter sizes interposed between both sides of the middle ferrule 18 and the front and rear guide ferrules 20a and 20b while being pressed against each other by the members of 61. 18b) are respectively extended to the inside and the outside at the same time to be firmly in close contact with the inner peripheral surface of the processing hole 40 and the outer surface of the conduit (stainless tube) 14 of the wire assembly module 60 to increase the sealing force. .

The above-described method is the same as the structure of the wire assembly module 60, as shown in Figs. 1, 2 and 7, the temperature sensor 44, which is an assembly for a heat sensor, assembled in the same way as the electrical through-assembly assembly. Since the sealing structure is also applied in the same way, the description is omitted.

On the other hand, as shown in Figure 1, the front plate 2, each wire assembly module 60, that is, for low pressure and control, measurement wire assembly module 60 and temperature sensor 44, branch valve 45, etc. Is mounted, and the nitrogen gas is filled through the filling conduit 31 shown in each of the wire assembly module 60, the temperature sensor 44, the branch valve 45 and the like, which is the respective assembly In the case of leakage in the gas leakage monitoring system 70, it is possible to check.

As shown in detail in the enlarged view of FIG. 9, the gas leakage monitoring system 70 includes a cap 22 and a front ferrule in the gas leakage detection hole 39 of the front plate 2. 23), to be assembled using the bag 24, branched from the T-shaped pipe 26 through the pipe 21, one is filled with gas through a known pressure gauge 29 and T-shaped pipe 28 and It consists of a valve 30 attached to be removable, and the other branch branched from the T-shaped pipe 26 is attached to the pressure switch 25 to check the pressure drop at the set pressure, and to the central control panel It is equipped with a function to make an alarm sound by connecting.

As shown in the enlarged view of FIG. 10, the branch valve 45 has an o-ring 32 on the front flange 2 and the welding flange 3 mounted on the concrete containment wall 1 of the nuclear power plant. (32-1) is applied to each mounting nut (35) inserted into the welding flange (3) by assembling bolts using a spring washer (34), and the branch valve Open 45 to fill nitrogen gas to O-rings 32 and 32-1 so that leakage of gas from the gas leakage monitoring system 70 can be monitored, and the filling pipe 31 of nitrogen gas Each end portion has a structure that seals by applying an O-ring 37 to the plug bolt (36).

The branch valve 45 passes through the conduit 46 between the O-rings 32 and 32-1 by the filling conduit 31 of the front plate 2, and opens the valve seat 47 of the conduit to the valve rod 47. The O-ring 49 mounted on the circumferential surface 48 is capable of opening and closing forward and backward by screw rotation in a state in which airtightness is maintained outside.

The wire assembly module 60 and the temperature sensor 44 to solve the problem in use of the wire assembly module 60 and the temperature sensor 44 by loosening the assembly tube cap 17 to enable free replacement assembly, It can be used for repair and exchange, can achieve many purposes as the assembly of electrical communication,

In particular, in the present invention, each assembly module 60, 44 is inserted into the processing hole of the elastic sealing material 15 of the polymer material is inserted into the interior of the stainless steel conduit 14 is a state in which the conductive film is coated The stainless steel conduit 14 is formed by a compression seal portion (P / S) formed by repeated pressing by a die to form a perfect sealing structure therein, due to the characteristics of the material according to the long-term use to prevent corrosion and at the same time sealing Perfection ensures safety.

This invention is not only limited to the application of nuclear power plants, but also reveals that it is possible to use water and thermal power plants.

As described in detail above, the present invention is an electrical through-assembly assembly capable of supplying a low voltage power cable, a control and a measurement cable in a nuclear power plant and a water and a thermal power plant, basically to seal the gas to achieve a pressure boundary, gas It is fundamentally to prevent leakage and leakage, and to ensure long-term reliability and safety to monitor the pressure drop and leakage in the gas-sealing zone due to long-term operation and to detect temperature changes such as temperature increase and decrease. In addition, it is easy to disassemble and assemble in the field, so it is easy to repair and replace.

Claims (8)

In the electrical through-assembly assembly 50 to which the wire assembly module 60 is applied through the reactor concrete containment wall and applied to the electric power of the low pressure electricity and control, the measurement electric line inside the reactor, The wire assembly module 60 is a low-pressure conductor 16 coated with an insulating film is continued inward through the processing hole of the elastic sealing material 15 of the polymer material, and inserted into the stainless steel conduit 14, As a compression sealing portion (P / S) formed by repeatedly pressing the outer circumference of the stainless conduit 14 by a conventional die, the assembly is assembled to the processing hole 40 of the front plate 2 in a sealed state. Electric through-hole assembly having a pressure maintaining monitoring function using a tube lock assembly, characterized in that the assembly inside the tube lock assembly (61). The method of claim 1, The tube lock assembly 61 has a plurality of front and rear O-rings 18a in which a middle ferrule 18 is formed in a processing hole 40 formed in the front plate 2 and a sealing effect is increased in both of the middle ferrules. , 18b), and the front and rear guide ferrules (20a, 20b) and the front and rear rock ferrules (19a, 19b) and the assembly tube cap (17) for sealing these O-rings by pressing tightly, the tube cap for assembly (17) is tightly assembled in a state that the separation from the front conical groove of the processing hole 40 by the screw tightening is made of a structure for sealing the outer periphery and the inner periphery of the conduit 14 and the processing hole 40 An electrical through-assembly assembly having a pressure maintaining monitoring function using a tube lock assembly. The method of claim 2, The front and rear plurality of polymer O-rings (18a, 18b) is a tube for the assembly of the potential rock ferrule (19a), guide ferrule (20a), the middle ferrule (18), the rear guide ferrule (20b), the rear rock ferrule (19b) The front and rear rock ferrules 19a and 19b and the front and rear guide ferrules 20a, on the inner tapered surface processed on the front plate 2 and the tube cap 17 for assembly by screwing the cap 17. 20b) is pressurized and pressurized by a force acting inwardly in contact with each other in a tapered portion to expand the outer circumferential surface of the front and rear polymer O-rings 20a on the outside to form a machining hole 40 in the front plate 2. The inner circumferential surface of the front and rear polymer O-rings 20b of the inner side is expanded to be in close contact with the outer circumferential surface of the conduit 14, and the inner ring groove 18- of the middle ferrule 18 1) and sealing spaces 41 and 42 are formed in the outer ring groove 18-2, and the sealing space 42 is a hole 39 for gas leakage detection. Such that the middle connection ferrule (18) is electrical penetrations aggregate with a pressure maintenance monitoring function using the tube lock joripcheeul, characterized in that it comprises a connection hole 43 in the circumferential direction. The method according to claim 2 or 3, The middle ferrule 18 of the tube lock assembly 61 has guide ring grooves 18a and 18b formed at both front and rear sides thereof, and the guide protrusion rings 20c and 20d at the front and rear guide ferrules 20a and 20b. The protrusion is formed through the screw assembly of the assembly tube cap 17, the electrical through-hole assembly having a pressure maintenance monitoring function using a tube lock assembly, characterized in that the slide movable assembly is coupled to each other in a coupled state. The method of claim 1, The front plate 2 is equipped with a branch valve 45 in addition to the respective wire assembly module 60 and the temperature sensor 44, the front through the filling pipe 31 formed in the front plate (2) Nitrogen gas is filled to the assembly portion of the wire assembly module 60 of the plate 2, and leakage of the leakage occurs at each assembly portion of the wire assembly module 60, the temperature sensor 44, and the branch valve 45. Case or internal pressure drop assembly of the electrical through which the pressure maintenance monitoring function, characterized in that configured to be confirmed from the outside by the gas leakage monitoring system (70) associated with the front plate (2). The method of claim 5, The gas leakage monitoring system 70 allows the pipe 21 to be assembled to the front plate 2 using the cap 22, the front ferrule 23, and the back ferrule 24, and the pipe 21 is assembled. Branched from the T-shaped tube 26 through one is composed of a known pressure gauge 29 and the valve 30 attached to the gas filling and removal through the T-shaped tube 28, branched from the T-shaped tube 26 The other part is attached to the pressure switch 25 so as to check the pressure drop at the set pressure, and the pressure maintenance characterized in that it has a function to connect to the normal central control panel so that an alarm sounds Aggregate of electrical through parts with monitoring function. The method according to claim 5 or 6, The branch valve 45 applies the O-rings 32 and 32-1 to the welding flange 3 mounted on the front plate 2 and the concrete containment wall 1 of the nuclear power plant. 3) Assemble the mounting bolt 33 to each mounting nut 35 inserted into the bolt using a spring washer 34, and then open the branch valve 45 to open the O-rings 32 and 32-1. Nitrogen gas is filled up to the portion so as to monitor leakage from the gas leakage monitoring system 70, and each end portion of the nitrogen gas filling pipe 31 is connected to the plug bolt 36 by an O-ring 37. Electric through-hole assembly with a pressure maintenance monitoring, characterized in that having a structure by applying a seal. The method of claim 7, wherein The branch valve 45 passes through the conduit 60 between the O-rings 32 and 32-1 to the filling conduit 31 of the front plate 2, and opens the valve seat 47 of the conduit valve rod 48. The electrical through-assembly assembly having a pressure maintaining monitoring function, characterized in that configured to open and close forward and backward by screw rotation in the state that the outside and airtight is maintained by the O-ring (49) mounted on the circumferential surface.