UA12994U - Locked sealing of a cable inlet or adapter - Google Patents

Abstract

The proposed locked sealing is designed for the use in cable inlets or adapters through which cables pass from the unprotected area to the protected area of the reactor of nuclear power plant. The space between the cables passing through the sealing is filled with hermetic (4). In the sealing case, sealing rings (6) are installed. The outside surface of each ring tightly fits the inside surface of the sealing case.

Description

Description of the invention

The technical solution refers to the sealing of the hermetic inlet with a lock. Inside the inlet there are 2 cables leading from the outside of the container to the inner hermetically isolated area of the container.

Today, the sealing of the hermetic inlet is filled between the electric cables with a filling compound, for example, on a resin basis. In an ideal case, the specified mass fits tightly to the inner circular wall of the sealed inlet so as to ensure a sealed insulation.

The disadvantage of this implementation is that cracks may form between the inner wall of the hermetic seal and the filling mass 710. This is caused by the fact that, under the influence of different temperatures, repeated expansion and compression of the mass occurs in the container equipment, resulting in the formation of cracks. As a result, the tightness of the equipment in the specified places is violated.

Sealing of the hermetic inlet of a round shape, through which the cables pass from the outside to the inner area of the container. The space between the cables in the seal is filled with filler. The essence of technical solution 72 is that an internal insert in the form of cylindrical rings is placed in the seal. Both central cylinders are connected around the entire perimeter, and the outer cylindrical surface of the inner insert fits snugly against the inner surface of the seal.

In the preferred embodiment, the free edge of the inner cylinder of the insert has holes around the perimeter, and at the same time has a perforated part at the end. 20 The end of the free edge of the outer cylinder of the inner insert is beveled at an angle of 459.

In another embodiment, at least one lock is made in the housing of the seal, which corresponds to the shape of the cut-out oriented in the inner space of the seal. The size of the depth of the lock corresponds to a maximum of 2/3 of the thickness of the seal body, and both corners of the lock are sharp. The lock has a radial shape. Locks are placed axially in the seal housing. 29 The advantage of the proposed solution is the prevention of the formation of a solid crack between the inner cylindrical surface of the sealed inlet seal and the filling mass, i.e. the prevention of depressurization between the inner zone and the outer side of the container.

Holes along the edge of the inner cylinder contribute to the distribution of forces, the perforated part at its end prevents the formation of a cut. The beveled part of the free edge of the outer cylinder of the inner insert facilitates the work of t 30 during installation or putty. Gee)

The advantage of using the option of a solution with locks is the reduction of the risk of cracks, because the degree of risk of their formation decreases with the increase of the unevenness of the surface to which the filling mass adheres. b

The technical solution is explained on the example of the presented figures, where: Ge - in Fig. 1, the longitudinal section of the hermetic coupling seal is presented.

Fig. 2 shows a detail of the lock made in the seal housing. --

An example of the implementation of the technical solution To ensure the hermetic entry of cables 10 passing from the outside into the inner zone of the nuclear reactor, a seal 1 of the hermetic entry with an internal insert b was used, in accordance with the technical decision. The space between the cores 9 of the cable 10 inside the "sealer 1" is filled with the filling mass 3. The internal insert 6 is made in the form of cylindrical rings. З7З 70 Both central cylinders are connected around the entire perimeter in such a way that in the longitudinal section, the wall c of the inner insert 6 has the shape of the letter 7, as can be seen in Fig.1. The inner insert 6 in the seal 1 of the hermetic inlet is placed so that the outer cylindrical surface of the inner insert fits snugly against the inner surface of the seal 1. At the same time, the free end of this cylindrical surface is beveled at an angle of 452 toward the center of the equipment. The free end of the inner cylinder of the inner insert b has 15 holes 8 along the perimeter and ends with a perforated part 7, in this case it is formed by a strainer.

In a variant version, a lock 11 is made in the housing 12 of the hermetic inlet, which corresponds to the shape of the recess 11, which is open towards the inner space of the seal 1. Both corners o, D of the lock 11 are sharp. c The size of the depth of the lock 11 corresponds to a maximum of 2/3 of the size of the thickness of the housing 12 of the seal 1. 50 The lock 11 has a radial shape, and if several locks 11 are used in the equipment, they are located se) axially.

T» List of symbols used on the figures: 1 - sealing;

C - pouring mass; 6 - internal insert; 7 - perforated end part; c 8 - openings; 9 - vein; - cable; at 11 - a castle; 12 - body; oh, VD - corners of the castle.

Claims (5)

The formula of the invention b5 1. Sealing of a hermetic inlet of a cylindrical shape with a lock, filled with cables passing from the outside to the inner zone of the hermetic space near the nuclear reactor with working devices, where the space between the cables in the place of the seal is filled with a filling mass (4), which differs in that in in the seal (1) there is an inner insert (b) in the form of cylindrical rings, and the two central cylinders are connected along the entire perimeter, and the outer cylindrical surface of the inner insert (6) fits tightly to the inner surface of the seal (1). 2. The sealing of the hermetic input according to claim 1, which is characterized by the fact that the free edge of the inner cylinder of the insert (6) has holes (8), located radially, and at the same time ends with a perforated part (7). 70 3. Sealing of the hermetic inlet according to claim 1 or claim 2, which differs in that the free edge of the outer cylinder of the inner insert (6) is beveled at an angle of 452. 4. Sealing of a hermetic inlet according to any of claims 1-3, which is characterized by the fact that in the housing (12) of the seal (1) at least one lock (11) is made, which corresponds to the shape of the cut-out, opened in the direction of the inner space of the seal ( 1), and the size of its recess is at most 2/3 of the size 7/5 of the thickness of the body (12) of the seal, and both corners (5, p) of the lock (11) are sharp and the lock (11) has a radial shape. 5. Sealing of the hermetic input according to claim 4, which is characterized by the fact that the locks (11) in the housing (12) of the seal (1) are placed axially. - « (22) (22) s h- - with . and? - ime) se) o 50 s» s 60 b5