CN202639101U

CN202639101U - Novel precision mold of quake-proof strip end cap for steam generator in nuclear power station

Info

Publication number: CN202639101U
Application number: CN2012202133150U
Authority: CN
Inventors: 华大凤; 王树平; 绍兴明; 华鹏
Original assignee: JIANGSU XINHUA ALLOY ELECTRIC APPARATUS CO Ltd
Current assignee: JIANGSU XINHUA ALLOY ELECTRIC APPARATUS CO Ltd
Priority date: 2012-05-14
Filing date: 2012-05-14
Publication date: 2013-01-02
Anticipated expiration: 2022-05-14

Abstract

The utility model discloses a novel precision mold of a quake-proof strip end cap for a steam generator in a nuclear power station. The novel precision mold comprises an upper mold, a lower mold and lugs which are matched with each other, wherein end cap mold cavities and quake-proof strip mold cavities at the two ends of the end cap mold cavity are formed in the middles of the upper mold and the lower mold; the lugs are fixedly arranged in the center of the end cap mold cavity of the upper mold and at the upper and lower ends of the quake-proof strip mold cavities respectively, and the quake-proof strip mold cavity at one end is provided with a first positioning hole; lower mold quake-proof strip mold cavities are provided with lug grooves which are matched with each lug; and a first positioning pin matched with the first positioning hole is fixed on the quake-proof strip mold cavity. Due to the adoption of the novel precision mold, the problem of tremendous economic loss caused by crack of a tube in the steam generator due to inaccurate manufacturing of the quake-proof strips is solved, and the pressing and fixing accuracies of the end cap on the quake-proof bars are ensured.

Description

A kind of nucleus power station steam generator precision die of anti-vibration strip end cap

Technical field

The utility model relates to the precision die that a kind of nucleus power station steam generator is used the anti-vibration strip end cap.

Background technology

AP1000 is the third generation million kilowatt advanced pressurized water reactor nuclear power generating sets of US Westinghouse company's exploitation.AP1000 is different from the security system that the main feature that two generations added CPR1000 compressed water reactor nuclear power unit is exactly " non-active "." non-active " design concept is exactly to utilize intrinsic hot-working hydraulic characteristic, simplify the design of security system, make nuclear power station guarantee that the measure of safety no longer relies on the operation of the active equipment such as pump, blower fan, thereby reduced significantly valve, pump, cable and the antidetonation factory building of safe level; Cancelled 1E level emergency diesel dynamo system; Reduced the active equipment of most of safe level; Reduced large material usage; System simplification makes design simplification, technology arrangement simplification, construction volume minimizing, operation and also corresponding minimizing of maintenance capacity.Steam generator is the nuclear power station key equipment, also be one of the maximum equipment that breaks down in the nuclear power station device, its effect is that handle is passed to secondary circuit water by the heat of the cooling agent of reactor, and makes it to become steam, passes into the cylinder work done of steam turbine generator again.

The service behaviour of steam generator and security reliability are vital for the safe and stable operation of whole yarn system.A nuclear power station need arrange several steam generators, include ten hundreds of heat-transfer pipes, heat-transfer pipe is U-shaped pipe, it is the critical piece of nuclear power station steam generator, the high-temperature setting-out flows in tube bank, flow with vertical direction along pipe for feedwater, be heated simultaneously, then be vaporized, steam enters the steam turbine generating, the fluid that contacts with these pipes can cause vibrations, break because vibrations can cause damaged tubular, directly cause steam generator and damage, change a steam generator and need 200,000,000 dollars expenses, need the shutdown some months, cause great economic loss.

Break in order to prevent that effectively pipe from shaking, the configuration anti-vibration strip comes support tube between the adjacent row of pipe, anti-vibration strip is set the nuclear plant safety reliability service is played key effect.

In order to realize this purpose, anti-vibration strip made requiring very strictly, especially pressing is fixed on the end cap at anti-vibration strip two ends, requires the height that the position precision of pressure point will be very, not so can affect the effect of anti-vibration strip.

The utility model content

The precision die of a kind of nucleus power station steam generator with the anti-vibration strip end cap that provide of the present utility model, solve because the making inaccuracy of anti-vibration strip causes pipe in steam generator to break, cause the problem of huge economic loss, guarantee that the end cap pressing is fixed on the accuracy on the anti-vibration strip, effectively brings into play the important function of anti-vibration strip in steam generator.

The utility model is achieved through the following technical solutions: a kind of nucleus power station steam generator comprises upper die and lower die and the projection of mutual coupling with the precision die of anti-vibration strip end cap; The anti-vibration strip die cavity at end cap die cavity and end cap die cavity two ends is all offered in the centre of described upper and lower mould, the center of the end cap die cavity of described patrix and anti-vibration strip die cavity up and down two ends be fixedly installed respectively projection and wherein the anti-vibration strip die cavity of an end offer the first locating hole, the anti-vibration strip die cavity of described counterdie all offer with the suitable projection groove of each described projection and anti-vibration strip die cavity on suitable the first alignment pin of fixing and described the first locating hole.

Be as further improvement of the utility model: described upper and lower mould all is fixedly installed on the described pressing plate.

Be as further improvement of the utility model: four diagonal angles of wherein said patrix are fixed with the second alignment pin respectively, and counterdie is offered the second corresponding with it locating hole.

Operation principle of the present utility model is: upper and lower mould all is fixed on the press by pressing plate, anti-vibration strip and end cap thereof are placed in the anti-vibration strip die cavity and end cap die cavity of counterdie, then directly be pressed together on the counterdie by the press patrix, the first alignment pin of counterdie just directly is fixed in the first locating hole of patrix like this, and the projection of patrix directly is pressed together on anti-vibration strip and the end cap and utilize the projection groove to form accurate pressure point, the setting of the second alignment pin is that generation is rocked when closing for fear of upper and lower mold pressing, impact is accuracy fixedly, has improved the precision of mould.

The beneficial effects of the utility model are: accuracy is high, making simply can be fast, end cap is fixed on the anti-vibration strip.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the structural representation of the anti-vibration strip of the utility model embodiment;

Fig. 3 is the patrix top view of the utility model embodiment;

Fig. 4 is the counterdie top view of the utility model embodiment;

Wherein 1-milling machine, 2-pressing plate, 3-the first locating hole, 4-the second alignment pin, 5-projection, 6-projection groove, 7-the second locating hole, 8-anti-vibration strip, 9-end cap, 10-pressure point.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail:

As shown in Figure 1, 2, 3: a kind of nucleus power station steam generator of the present embodiment comprises upper die and lower die and the projection 5 of mutual coupling with the precision die of anti-vibration strip end cap; The anti-vibration strip die cavity at end cap die cavity and end cap die cavity two ends is all offered in the centre of described upper and lower mould, and upper and lower mould all is fixedly installed on the described pressing plate 2.

The center of the end cap die cavity of described patrix and anti-vibration strip die cavity up and down two ends be fixedly installed respectively projection 5 and wherein the anti-vibration strip die cavity of an end offer the first locating hole 3, the anti-vibration strip die cavity of described counterdie all offer with the suitable projection groove 6 of each described projection 5 and anti-vibration strip die cavity on suitable the first alignment pin 1 of fixing and described the first locating hole 3.

Four diagonal angles of wherein said patrix are fixed with the second alignment pin 4 respectively, and counterdie is offered the second corresponding with it locating hole 7.

Such as Fig. 1,2,3,4, upper and lower mould all is fixed on the press by pressing plate 2, anti-vibration strip 8 and end cap 9 thereof are placed in the anti-vibration strip die cavity and end cap die cavity of counterdie, then directly be pressed together on patrix on the counterdie by press, the first alignment pin 1 of counterdie just directly is fixed in the first locating hole 3 of patrix like this, and the projection 5 of patrix directly is pressed together on anti-vibration strip 8 and the end cap 9 and utilize accurate pressure point 10, the second alignment pins 4 of projection groove 6 formation of counterdie directly to be fixed on the second locating hole 7.

The beneficial effect of the present embodiment is: produce when avoiding upper and lower mold pressing to close and rock, the raising end cap is fixed on the accuracy on the anti-vibration strip.

Claims

1. the precision die of a nucleus power station steam generator usefulness anti-vibration strip end cap is characterized in that: the upper die and lower die and the projection (5) that comprise mutual coupling; The anti-vibration strip die cavity at end cap die cavity and end cap die cavity two ends is all offered in the centre of described upper and lower mould, the center of the end cap die cavity of described patrix and anti-vibration strip die cavity up and down two ends be fixedly installed respectively projection (5) and wherein the anti-vibration strip die cavity of an end offer the first locating hole (3), the anti-vibration strip die cavity of described counterdie all offer with the suitable projection groove (6) of each described projection (5) and anti-vibration strip die cavity on suitable the first alignment pin (1) of fixing and described the first locating hole (3).

2. a kind of nucleus according to claim 1 power station steam generator is with the precision die of anti-vibration strip end cap, and it is characterized in that: described upper and lower mould all is fixedly installed on the described pressing plate (2).

3. a kind of nucleus according to claim 1 and 2 power station steam generator is with the precision die of anti-vibration strip end cap, it is characterized in that: four diagonal angles of wherein said patrix are fixed with the second alignment pin (4) respectively, and counterdie is offered corresponding with it the second locating hole (7).