RU2564957C1 - Slide gate - Google Patents

Abstract

FIELD: power industry.

SUBSTANCE: invention is designed for shutting off and sealing of fuel recharging ducts in a nuclear reactor with a liquid-metal coolant (LMC), in particular, it can be used for removal of spent fuel assemblies (SFA). In a slide gate, a moving frame is fixed in slots of a moving solid damper on guide pins with a tension spring with a possibility of horizontal and vertical movement relative to the damper; a support with a moving bowl for collection of LMC, which is arranged on it, is installed on the moving frame; between the moving frame and the bowl there are springs installed, providing movability of the bowl in three planes and creation of a pressure force of the bowl to a seal ring installed in a flange of the slide gate; the slide gate housing is provided with a detachable sealing cover plate. Besides, the flange with the seal ring is of a detachable type.

EFFECT: invention provides collection of LMC residues, ensures reliable sealing and enlargement of technological capabilities and biological protection.

2 cl, 9 dwg

Description

The invention relates to nuclear technology, in particular to gate valves, and is intended to shut off and seal the fuel loading channels in a nuclear reactor with a liquid metal coolant (LMT), in particular, it can be used to extract spent fuel assemblies (SFA).

It is known that when extracting spent fuel assemblies from a nuclear reactor with a liquid metal coolant, it is necessary to collect the residues of iron-ore materials remaining on the SFA and flowing down.

The closest set of essential features to the proposed invention is a slide gate (patent RU No. 2281428, IPC P16K 3/18, publ. 2005), comprising a housing in which a locking member is arranged, made in the form of a disk with a seal and connected to the actuator the carriage. The seal is mounted on a movable disk. Sealing is ensured by moving the carriage and pivotally mounted rocker arm and leash, on the ends of which the rollers are mounted, interacting with the grooves of the slide gate

The disadvantages of this gate valve are as follows:

- the locking body cannot ensure the accumulation of LMW, the remains of which flow down from the SFA;

- the presence of the sealing ring on the movable disk leads to the inevitable hit on it of the MMC, thereby violating the sealing of the node;

- the movable disk associated with the movable carriage with the beam and the leash, is deprived of mobility in three planes, which impairs sealing with the large size of the node.

An object of the invention is to develop the design of a slide gate that collects the residues of the MMT, reliable sealing, expansion of technological capabilities and biological protection.

This problem is solved in that the slide gate includes a massive body, a massive movable gate mounted inside the body with the ability to move along the guides by means of four pairwise mounted rollers, a movable frame mounted on pins with the ability to move in the vertical direction and interacting with the figured grooves of the massive movable gate by means of rollers mounted on a movable frame according to the invention

the movable frame is fixed in the grooves of the massive movable gate on the guide pins with a stretching spring with the possibility of horizontal and vertical movement relative to the gate,

a support is mounted on the movable frame, with a movable bowl placed on it to collect the remains of the MMT,

springs are installed between the movable frame and the bowl, providing the bowl's mobility in three planes and providing the force of pressing the bowl to the o-ring installed in the flange of the slide gate,

the gate valve housing is made with a removable sealing cover.

It is advisable to make the flange with the sealing ring removable.

When using the invention, the following technical results are possible, in particular:

- ensuring the collection of residues of iron ore materials;

- expansion of technological capabilities;

- Prevention of the ingress of residues of the MMT into the sealing assembly;

- removal of frozen MMT.

The technical result is achieved by the fact that the cup connected to the movable frame is mounted with the possibility of moving relative to the massive movable gate in three planes and is made with the cup and the cavity in it to collect the residues of the MMT, while the cup, moving up to come into contact with the sealing ring of the flange, It ensures the prevention of the ingress of residues of metal fluids flowing from the discharged SFA into the sealing assembly.

Removing the frozen residue of the MMT in the bowl is provided by a removable sealing cover, which is part of the slide gate, after performing the operation of unloading the SFA.

The expansion of technological capabilities is achieved by the fact that the design of the slide gate ensures the implementation of technological operations to seal and seal the assembly, collect and remove residues of the MMT, and the biological protection of the slide gate.

The invention, in the particular case of implementation, is illustrated by the following drawings, presented in figures 1-9:

figure 1 - section BB (figure 1);

figure 2 - General view of the slide gate;

figure 3 is a section aa (figure 1);

figure 4 - element D (figure 3);

figure 5 - element E (figure 1);

6 is a view of W (figure 1);

Fig.7 - element M (Fig.6);

Fig.8 is a section of L-L (Fig.6);

Fig.9 - element K (Fig.6).

The slide gate consists of a massive body 1 (Fig. 1), walls 2, 3 (Fig. 3), a flange 4 (Fig. 1) and a removable sealing cover 5 (Fig. 1), which is designed to remove the frozen residue of the MMT after execution SFA unloading operations. On the wall 2 (Fig. 2, 3), a displacement drive 6 (Fig. 2) is mounted, which is connected to the rail 8 (Fig. 3, 6) of the massive movable gate 9 using a gear 7 (Fig. 3, 6) 1, 3), having the ability to move along the massive body 1 (Fig. 1) due to four pairwise mounted rollers 10 (Figs. 3, 8), interacting with the guides 11 (Fig. 8) mounted on the walls 2, 3 .

On the sides of the massive movable gate 9, strips 12 are fixed (Fig. 3, 8), and on its upper surface lies a movable frame 13 (Figs. 3, 8), while the planks 12 are provided with curly grooves M (Fig. 7), which interact with the rollers 14 (Fig. 8), mounted on the frame of the movable 13. In addition, the movable frame 13 is equipped with rollers 15 (Fig.6), which can interact with the stops 16 (Fig.6, 9) of the massive body 1 (Fig. 1), as well as guide pins 17 (Figs. 1, 5), which are connected with a massive movable gate 9 using springs 18 (Fig. 5), while in the array ohm movable vanes grooves 9 are P (5), which provide horizontal movement therein guide pins 17. The guide pins 17 and rollers 15, M grooves provide horizontal movement of the frame 13 movable relatively massive movable slide 9.

The movable frame 13 is connected to the bowl 19 (FIGS. 1, 3, 5), which has a cavity for collecting the residues of the MMT, support 20 (FIG. 4) and, for example, three springs 21 (FIG. 4) and a washer 22 (FIG. four). The bowl 19 thus mounted has mobility in three planes.

On the flange 4 (figure 1, 5) is installed a sealing ring 23 (figure 5). Massive movable gate 9 has the ability to interact with the stops 24, 25 (figure 1) of the massive body 1.

The total force of the springs 21 exceeds the weight of the frame of the movable 13 and the bowl 19, the washer 22 and the springs 21. The massive body 1, walls 2, 3, the movable gate 9 (Figs. 1, 3) are elements of the biological protection of the slide gate.

The slide gate operates as follows

The movement drive 6, rotating the gear wheel 7, transmits the movement through the rail 8 to a massive movable gate 9, which, moving along the guides 11 by means of four pairwise mounted rollers 10, transmits the motion of the movable frame 13 by means of the guide pins 17 and springs 18.

The movable frame 13 moves to the contact of the rollers 15 with the stops 16 of the massive body 1, while the massive movable gate 9 continues to move to the adjustable stop 25, and the movable frame 13 begins to move upward along the guide pins 17, while stretching the springs 18 due to the interaction of the figured grooves M strips 12 of a massive movable slide 9 and rollers 14.

The cup 19 also moves up to contact with the sealing ring 23 of the flange 4 and is aligned with the sealing ring 23 by means of springs 21, support 20 and washer 22. With further movement of the movable frame 13 and the bowl 19 upward, the compression ring 23 is compressed and the assembly is sealed.

The movement drive 6 is stopped due to the supply of a trip signal when exceeding the limit torque, which is set by the movement drive and mounted in it. The slide gate is closed and sealed.

To open the slide gate actuator 6 moves in the opposite direction. In this case, a massive movable gate 9 squeezes the movable frame 13, and the springs 18 tear the cup 19 away from the o-ring 23. Subsequently, the movable frame (plate) 13 fits to the adjustable stop 24; slide gate open.

After solidification of the remainder of the MMT in the bowl 19 using a removable sealing cover 5, it is possible to remove it from the slide gate.

Claims (2)

1. A slide gate, including a massive case, a massive movable gate mounted inside the case with the ability to move along the guides by means of four pairwise mounted rollers, a movable frame mounted on pins with the ability to move in the vertical direction and interacting with the figured grooves of the massive movable gate through the rollers, mounted on a movable frame, characterized in that the movable frame is fixed in the grooves of the massive movable slide on the guide pins with tensile with a spring with the possibility of horizontal and vertical movement relative to the gate, a support is mounted on the movable frame with a movable bowl placed on it to collect the residues of the liquid metal coolant, springs are installed between the movable frame and the bowl, ensuring the bowl's mobility in three planes and providing the force of pressing the bowl to the sealing the ring installed in the flange of the slide gate, the housing of the slide gate is made with a removable sealing cover. 2. The slide gate according to claim 1, characterized in that the flange with the sealing ring is removable.

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