WO2017012263A1

WO2017012263A1 - Connecting module for containment recycling filter

Info

Publication number: WO2017012263A1
Application number: PCT/CN2015/098550
Authority: WO
Inventors: 邵慧超; 王晓; 于江; 张立德; 帅剑云; 周国丰; 吴伟
Original assignee: 中广核研究院有限公司; 中国广核集团有限公司; 中国广核电力股份有限公司
Priority date: 2015-07-20
Filing date: 2015-12-24
Publication date: 2017-01-26
Also published as: GB2554600B; GB2554600A; GB2554600A8; CN105148598B; GB201719312D0; GB2554600B8; CN105148598A

Abstract

A connecting module (2) for a containment recycling filter comprises a main body (20), at least two elastic sheets (21), and at least two elastomers (22). The main body (20) comprises an upper wall (201) and a lower wall (202) that are opposite to each other as well as a first side wall (203) and a second side wall (204) that are opposite to each other. Two ends of the upper wall (201) are separately fixed at one end of the first side wall (203) and at one end of the second side wall (204). Two ends of the lower wall (202) are separately fixed at the other end of the first side wall (203) and at the other end of the second side wall (204). The first side wall (203) is shorter than the second side wall (204), and both the upper wall (201) and the lower wall (202) are approximately trapezoidal. Connecting flange parts (23) that turn and extend outwards relative to the upper wall (201), the lower wall (202), the first side wall (203), and the second side wall (204) are separately disposed at the openings at two ends of the main body (20). The elastic sheets (21) and elastomers (22) are disposed outside the two connecting flange parts (23), the inner edges of the elastic sheets (21) are fixed to the connecting flange parts (23), intervals are available between the outer edges of the elastic sheets (21) and the connecting flange parts (23), and the elastomers (22) are clamped between the elastic sheets (21) and the connecting flange parts (23). The connecting module (2) facilitates mounting and angle adjustment of a filter module, and has the effects of a pipeline module and a connecting piece, and meanwhile, a sealing structure is no longer required.

Description

Containment recirculation filter connection module

Technical field

The invention relates to the technical field of a safety system of a pressurized water reactor nuclear power plant, in particular to a safety shell recirculation filter connection module.

Background technique

The pit located at the bottom of the reactor containment of the PWR nuclear power plant is used to collect coolant from the primary circuit when a major leak is collected. After a baseline accident such as a coolant loss accident (LOCA) or a main steam pipe rupture (MSLB) at a pressurized water reactor nuclear power plant, the coolant enters the containment pit through the break, and the coolant passes through the containment in the pit. The circulating filter is filtered and then passed through the pump unit into the safe injection system (RIS) and the containment spray system (EAS) for reactor cooling to avoid serious core damage and containment overpressure.

The coolant entering the containment pit after the accident is interspersed with a large amount of insulation and other material fragments, which must be filtered through a recirculation filter to ensure safe operation of the safety injection system and the containment spray system. Therefore, the containment recirculation filter is an important equipment for the safety system of the pressurized water reactor nuclear power plant. Under the working condition of the recirculating condition, its working condition directly affects the normal operation of the safety injection system and the safety shell sprinkler system.

The containment recirculation filter generally includes a plurality of filter modules a1 arranged in an arc along the pit ring b, as shown in FIG. Therefore, in the prior art, the confluence channel a11 of the filter module a1 is formed as shown in FIG. 2 in order to realize the connection between the two adjacent filter modules a1. One side is a straight side and the other side is a trapezoidal structure with a hypotenuse. However, the degree of inclination of the oblique side of the trapezoidal structure is fixed, so that the filter module a1 can only be arranged according to a fixed radius and thus is only suitable for a safety shell of one specification. For different pits, it is necessary to separately set a variety of filter modules with different degrees of inclination of the bevel, which increases the production cost and causes inconvenience in processing and installation.

In addition, the position of the four recirculation pump inlets (including the two safety injection system pump inlets and the two containment spray system pump inlets) provided in the pit is fixed for the two pump inlets that are closer to each other. In other words, the number of filter modules a1 disposed therebetween is small, so the filtration area and the filtering effect are not required, and the amount of coolant entering the two pump inlets is less than the other two pump inlets. In order to eliminate this difference in filtration effect and coolant flow, a pipe module a2 is additionally provided above the middle two pump inlets. The pipe module a2 needs to be connected to the filter module a1, and it is also necessary to additionally provide a sealing structure between the pipe module a2 and the filter module a1, which is inconvenient to install.

In order to solve the above problems, it is necessary to provide a connection module which can be used as a pipe module without additionally providing a sealing structure, and can adjust the arrangement angle of the filter module and facilitate installation.

Summary of the invention

The object of the present invention is to provide a connection module which can be used as a pipe module without additionally providing a sealing structure, and can adjust the arrangement angle of the filter module and facilitate installation.

In order to achieve the above object, the present invention provides a containment recirculation filter connection module comprising a main body, at least two elastic pieces and at least two elastic members. The main body includes opposite upper and lower walls and opposite first and second side walls, and two ends of the upper wall are respectively fixed to one end of the first side wall in the height direction and the second One end of the side wall in the height direction, and the other ends of the lower wall are respectively fixed to the other end in the height direction of the first side wall and the other end in the height direction of the second side wall, the first side wall The length is smaller than the length of the second side wall, and both the upper wall and the lower wall are substantially trapezoidal. The connecting ends of the two ends of the main body are respectively provided with connecting flange portions extending outwardly relative to the upper wall, the lower wall, the first side wall and the second side wall. The outer side of the connecting flange portion is provided with the elastic piece and the elastic member, the inner edge of the elastic piece is fixed to the connecting flange portion, and the outer edge of the elastic piece and the connecting flange portion are There is a space therebetween, and the elastic member is sandwiched between the elastic piece and the connecting flange portion.

Compared with the prior art, the containment recirculation filter connection module of the present invention has the following advantages:

First, since the lengths of the first side wall and the second side wall of the main body are different, and the upper wall and the lower wall are trapezoidal, the whole connection module also has a trapezoidal frame body of different sizes at both ends. The structure, when the filter is installed, the connection module is disposed between two adjacent filter modules, and the trapezoidal structure of the connection module can be used to adapt the angle between the two filter modules to complete the connection of the two filter modules. There is no need to make the manifold of the filter module into a trapezoid, so that the specifications of the filter module are unified, and the processing cost and installation difficulty are reduced. By configuring different connection modules, a plurality of filter cloths can be realized by the same filter module. Set the solution to meet the needs of different on-site environments. Secondly, the main body of the connection module can function the same as the pipe module of the prior art, eliminating the messy pipe module, and the said connecting flange portion after the connection module is connected with the filter module The elastic piece and the elastic member are pressed between the main body and the filter module, and the elastic restoring force is spliced to realize the sealing between the filter module and the connection module, and the sealing structure cannot be additionally provided, and the installation is convenient.

Preferably, the connecting flange portion has an annular shape that is open around the end of the main body, and the elastic piece and the elastic member also have a ring shape corresponding to the shape. The elastic piece and the elastic member are disposed in a ring shape corresponding to the connecting flange portion, so that the contact area with the connecting flange portion can be maximized, and the sealing effect is enhanced.

Specifically, the elastic member has a circular cross section, and an outer edge of the elastic piece is bent into an arc shape to accommodate the elastic member. The outer edge of the elastic piece is bent and shaped to receive the elastic member, which is advantageous for securing the elastic member between the elastic piece and the connecting flange portion.

More specifically, the elastic member is a metal mesh cord which is rolled up by a metal mesh and which is connected end to end. The elastic member made of a metal mesh roll is formed in a rope shape in order to make the elastic member have a certain structural rigidity while being elastic, so that it can be deformed and pressed while being stressed, and has a strong recovery. The trend of the original shape.

Preferably, the upper wall is provided with an upper reinforcing rib, and two ends of the upper reinforcing rib are respectively fixed to the two connecting flange portions. The function of the upper reinforcing rib is to enhance the structural strength of the connecting module.

Preferably, the lower wall is provided with a lower reinforcing rib, and two ends of the lower reinforcing rib are respectively fixed to the two connecting flange portions. The function of the lower reinforcing rib is to enhance the structural strength of the connecting module.

Preferably, the first side wall and the second side wall are respectively provided with side reinforcing ribs, and two ends of the side reinforcing ribs are respectively fixed to the two connecting flange portions. The side reinforcing ribs function to enhance the structural strength of the connecting module.

Specifically, the side reinforcing ribs are provided with studs. The stud is for fixing to the filter module of the filter.

DRAWINGS

1 is a schematic view showing the arrangement of a filter module in a pit tunnel in the prior art.

2 is a schematic view of a sink of a filter module in the prior art.

Figure 3 is a perspective view of the containment recirculation filter connection module of the present invention.

4 is a partial exploded view of the containment recirculation filter connection module of the present invention.

Figure 5 is a top plan view of the containment recirculation filter connection module of the present invention.

detailed description

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 3, the present invention provides a containment recirculation filter connection module 2 for being disposed between two adjacent filter modules and connecting the two filter modules. The containment recirculation filter connection module 2 includes a main body 20, at least two elastic pieces 21, and at least two elastic members 22.

The main body 20 has a frame structure enclosing the cavity in the middle and includes opposite and parallel upper and

lower walls

201 and 202 and opposite first and

second side walls

203, 204, respectively One end of the side wall 203 in the height direction and one end of the second side wall 204 in the height direction, and both ends of the lower wall 202 are respectively fixed to the other end of the first side wall 203 in the height direction and the second side wall 204 in the height direction. The other end. The length of the first side wall 203 is smaller than the length of the second side wall 204. The upper wall 201 and the lower wall 202 are both substantially trapezoidal, and the narrow end of the upper wall 201 and the lower wall 202 is fixed to the first side wall 203, the upper wall. One end of the 201 and the lower wall 202 is fixed to the second side wall 204. Specifically, the upper wall 201 and the lower wall 202 are planar, and the first sidewall 203 and the second sidewall 204 are both V-shaped by two planes, and the first sidewall 203 and the second sidewall The direction in which the side walls 204 are convex is uniform.

The connecting flanges 23 of the upper end 201, the lower wall 202, the first side wall 203 and the second side wall 204 are respectively folded outwardly, and the connecting flange portion 23 surrounds the main body 20 A rectangular ring structure with an open end.

The upper wall 201 is provided with an upper reinforcing rib 205, and both ends of the upper reinforcing rib 205 are respectively fixed to the two connecting flange portions 23. The lower wall 202 is provided with a lower reinforcing rib (not shown), and both ends of the lower reinforcing rib are respectively fixed to the two connecting flange portions 23. Two side reinforcing ribs 206 are respectively disposed on the first side wall 203 and the second side wall 204, and two ends of the side reinforcing ribs 206 are respectively fixed to the two connecting flange portions 23. The upper reinforcing rib 205, the lower reinforcing rib and the side reinforcing rib 206 both function to strengthen the structural strength of the connecting module 2. In addition, protruding studs 206a are respectively disposed at two ends of the side reinforcing ribs 206, and the studs 206a are connected and fixed to the filter module.

In the embodiment, the elastic piece 21 and the elastic member 22 each have a rectangular annular structure corresponding to the connecting flange portion 23, so the number of the elastic piece 21 and the elastic member 22 are both two. One elastic piece 21 and one elastic member 22 are disposed on one connecting flange portion 23, and the other elastic piece 21 and the other elastic member 22 are disposed on the other connecting flange portion 23. The inner edge of the elastic piece 21 is fixed to the outer side surface of the connecting flange portion 23 by means of welding or the like, and the outer edge of the elastic piece 21 and the connecting flange portion 23 are spaced apart from each other, and the outer edge of the elastic piece 21 is bent into an arc shape. The elastic member 22 has a circular cross section and is accommodated in an arcuate region of the outer edge of the elastic piece 21, and the elastic member 22 is sandwiched between the elastic piece 21 and the connecting flange portion 23. Specifically, the elastic member 22 is a metal mesh cord which is rolled up by a metal mesh and which is connected end to end, so that the elastic member 22 has elasticity and also has a certain rigidity.

The studs in this embodiment may be directly formed in the corresponding positions, or may be threaded into the existing studs after being punched in the corresponding positions.

Compared with the prior art, the present invention has the following advantages: the containment recirculation filter connection module 2 of the present invention has the following advantages:

First, since the lengths of the first side wall 203 and the second side wall 204 of the main body 20 are different, and the upper wall 201 and the lower wall 202 are trapezoidal, the whole connection module 2 also has a trapezoidal frame body of different sizes at both ends. The structure, when the filter is installed, the connection module 2 is disposed between the adjacent two filter modules, and the trapezoidal structure of the connection module 2 can be used to adapt the angle between the two filter modules to complete the connection of the two filter modules. There is no need to make the manifold of the filter module into a trapezoid, so that the specifications of the filter module are unified, and the processing cost and installation difficulty are reduced. By configuring different connection modules 2, various filter arrangements can be realized by the same filter module to meet different sites. Environmental needs. Secondly, the main body 20 of the connection module 2 can function the same as the pipe module of the prior art, eliminating the messy pipe module, and connecting the flange portion 23 after the connection module 2 is connected to the filter module. The elastic piece 21 and the elastic member 22 are pressed between the main body 20 and the filter module, and the elastic restoring force is combined to realize the sealing between the filter module and the connection module 2, and the sealing structure cannot be additionally provided, and the installation is convenient.

The above disclosure is only a preferred embodiment of the present invention, and its function is to facilitate understanding and implementation by those skilled in the art, and of course, it is not intended to limit the scope of the present invention. Equivalent variations are still within the scope of the invention.

Claims

A containment recirculation filter connection module, comprising: a main body, at least two elastic pieces and at least two elastic members;

The main body includes opposite upper and lower walls and opposite first and second side walls, and two ends of the upper wall are respectively fixed to one end of the first side wall in the height direction and the second One end of the side wall in the height direction, and the other ends of the lower wall are respectively fixed to the other end in the height direction of the first side wall and the other end in the height direction of the second side wall, the first side wall The length of the second side wall is smaller than the length of the second side wall, and the upper wall and the lower wall are both substantially trapezoidal.

The connecting ends of the two ends of the main body are respectively provided with connecting flange portions extending outwardly relative to the upper wall, the lower wall, the first side wall and the second side wall.

The outer side of the connecting flange portion is provided with the elastic piece and the elastic member, the inner edge of the elastic piece is fixed to the connecting flange portion, and the outer edge of the elastic piece and the connecting flange portion are There is a space therebetween, and the elastic member is sandwiched between the elastic piece and the connecting flange portion.
The containment recirculation filter connection module according to claim 1, wherein the connecting flange portion has an annular shape that is open around an end of the main body, and the elastic piece and the elastic member also have a shape corresponding to each other. Ring.
The containment recirculation filter connection module according to claim 2, wherein said elastic member has a circular cross section, and an outer edge of said elastic piece is bent into an arc shape to accommodate said elastic member.
The containment recirculation filter connection module according to claim 3, wherein the elastic member is a metal mesh cord which is rolled up by a metal mesh and which is connected end to end.
The containment recirculation filter connection module according to claim 1, wherein the upper wall is provided with an upper reinforcing rib, and two ends of the upper reinforcing rib are respectively fixed to the two connecting flange portions.
The containment recirculation filter connection module according to claim 1, wherein the lower wall is provided with a lower reinforcing rib, and both ends of the lower reinforcing rib are respectively fixed to the two connecting flange portions.
The containment recirculation filter connection module according to claim 1, wherein the first side wall and the second side wall are respectively provided with side reinforcing ribs, and the two ends of the side reinforcing ribs are respectively It is fixed to the two connecting flange parts.
The containment recirculation filter connection module according to claim 7, wherein the side reinforcing ribs are provided with studs.