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Pollution discharge valve for nuclear island

A blowdown valve and nuclear island technology, applied in the field of blowdown valves for nuclear islands, can solve problems such as secondary circuit water loss and achieve good protection effects

Inactive Publication Date: 2017-08-04
ANHUI KECHUANG INTELLIGENT INTPROP SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the water in the secondary circuit is recycled during the working process, the water in the secondary circuit is still seriously lost during the circulation process. In this way, in the actual working process of the evaporator, it is necessary to continuously replenish water in the secondary circuit

Method used

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  • Pollution discharge valve for nuclear island

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, a blowdown valve for a nuclear island includes a valve seat 1 and a valve core 4 arranged on the valve seat 1. The valve seat 1 is provided with an inlet hole 2 and an outlet hole 3, and the inlet hole 2 and the outlet hole 3 are There is a communication hole 6 between them, the communication hole 6 is provided with a sealing section 5, and the valve core 4 is also connected with a driving part 9 for driving the valve core 4 to move, and the sealing section 5 is arranged in the communication hole The tapered hole on the 6, the part used to cooperate with the sealing section 5 on the valve core 4 is a tapered section 7, and the larger end of the tapered hole is facing the inlet end of the communication hole 6;

[0026] The valve core 4 is hingedly connected to the driving part 9 through a joint bearing, and the center of the spherical surface on the joint bearing falls on the axis of the valve core 4 .

[0027] Specifically, the above driving ...

Embodiment 2

[0029] Such as figure 1 As shown, this embodiment is further limited on the basis of Embodiment 1: the valve core 4 is also provided with an annular boss 8, the boss 8 is facing the inlet end of the communication hole 6, and the boss 8 8 is located outside the inlet end of the communication hole 6, and the projection of the communication hole 6 toward the boss 8 falls within the edge of the boss 8;

[0030] The distance between the boss 8 and the communication hole 6 is less than or equal to the distance between the sealing section 5 and the valve core 4;

[0031] The diameter of the inlet end of the communication hole 6 is larger than the diameter of the sealing section 5 .

[0032] In the prior art, the blowdown valve of the nuclear reactor evaporator mostly adopts a stop valve. In this way, when the blowdown valve installed at the bottom of the secondary circuit water is working, the particulate impurities in the secondary circuit water will block the sealing surface durin...

Embodiment 3

[0038] Such as figure 1 As shown, this embodiment is further limited on the basis of any one of the technical solutions provided by any one of the above embodiments: in order to facilitate the connection between the drain valve and the pipe sections on both sides, and at the same time ensure the reliability of the sealing of the connection surface, it is also included. There are two connecting flanges on the valve seat 1, the inlet end of the inlet hole 2 and the outlet end of the outlet hole 3 are respectively connected with a connecting flange, and the sealing surfaces on the connecting flanges are all tongue and groove surfaces.

[0039] In order to prevent the valve core 4 from vibrating too strongly under the action of the fluid when the drain valve is open, it also includes an elastic sheet 10 fixed on the valve seat 1 , and the free end of the valve core 4 is fixed on the elastic sheet 10 .

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Abstract

The invention discloses a pollution discharge valve for a nuclear island. The pollution discharge valve comprises a valve seat and a valve core arranged on the valve seat. An inlet hole and an outlet hole are formed in the valve seat, a communicating hole is formed between the inlet hole and the outlet hole, and a sealing section is arranged on the communicating hole. A driving part for driving the valve core to move is further connected to the valve core, the sealing section is a conical hole formed in the communicating hole, the portion, used for being matched with the sealing section, on the valve core is a conical section, and the end, with a large diameter, of the conical hole faces the inlet end of the communicating hole. The valve core and the driving part are connected in a hinged mode through a joint bearing, and the sphere center of the upper sphere face of the joint bearing falls at the axis of the valve core. In the working process, the pollution discharge valve enables the sealing face to be well protected.

Description

technical field [0001] The invention relates to the technical field of nuclear reactor equipment, in particular to a blowdown valve for a nuclear island. Background technique [0002] The evaporator is an important part in the nuclear island of a nuclear reactor. The reactor coolant, that is, the fluid in the primary circuit process, carries the heat generated by the nuclear reaction of the nuclear reactor into the evaporator, and transfers the heat to the secondary circuit water under the condition of physical isolation. After the water in the secondary circuit is heated, steam is generated to drive the steam turbine, etc., and the water in the secondary circuit is condensed into liquid water by the water in the third circuit and then replenished into the secondary circuit. Although the water in the secondary circuit is recycled during the working process, the water in the secondary circuit is still seriously lost during the circulation process. In this way, in the actual w...

Claims

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Application Information

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IPC IPC(8): F16K1/42F16K1/48F16K41/02F16K31/122B01D35/04
CPCB01D35/04F16K1/42F16K1/48F16K31/122F16K41/02
Inventor 徐桥
Owner ANHUI KECHUANG INTELLIGENT INTPROP SERVICE CO LTD
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