Background technology
The melt pit that is located at pressurized-water reactor nuclear power plant containment vessel bottom is from the cooling agent in a loop when being used for collecting significant leakage.After the generation benchmark accident such as coolant loss accident (LOCA) or main steam line rupture accident (MSLB) of pressurized-water reactor nuclear power plant, cooling agent enters containment sump by cut, these cooling agents will filter by the containment sump filter, enter safety injection system (RIS) and containment spray system (EAS) by pump installation then and be used further to the reactor cooling, to avoid reactor core major injury and containment superpressure.
Therefore, the containment sump filter is the visual plant of pressurized-water reactor nuclear power plant security system, and its working condition directly has influence on the normal operation of safety injection system, containment spray system under the recirculation operating mode.After accident, enter and be mingled with a large amount of insulation materials and the fragment of other material in the cooling agent in the containment sump, must carry out security function to guarantee safety injection system, containment spray system by sump filter with these debris filters.
Collecting tray is one of important component of containment sump filter, its project organization has material impact to the performance of containment sump filter, for example, when the spacing between filter cylinder is too small, impurity appears between filter cylinder easily, connecting of fragment, phenomenon such as silt up, when spacing is excessive, can cause the size of single filter to increase again, the also corresponding increase of the occupy-place of sump filter integral body, therefore and containment sump-3.5 sheaf space is limited, will certainly increase the difficulty of arranging containment sump filter, because collecting tray is the fixing structural elements of filter cylinder, its structure has directly determined the installing space of filter cylinder, and remote-effects the performance of filtering.
The structure of existing collecting tray is used to install the spacing of the installing hole of filter cylinder and all fixes, need make the different multiple collecting tray of filter cylinder spacing for obtaining best filter cylinder spacing, cost consumption is huge, increased the required material of collecting tray and the expense of processing developed virtually, loading and unloading and debugging to collecting tray need expend a large amount of time, and efficient is not high.
The utility model content
The utility model embodiment technical problem to be solved is, a kind of containment sump filter collecting tray structure and this containment sump filter that is used for pressurized-water reactor nuclear power plant is provided, can adjust the spacing of containment sump filter filter cylinder, promoted the strainability of filter cylinder, reduced the mounting arrangements difficulty of containment sump filter, further reduced because of adjusting required material and the processing cost of collecting tray structure, saved loading and unloading, debug time.
In order to solve the problems of the technologies described above, the utility model embodiment provides a kind of containment sump filter collecting tray structure, be used to install and fix the filter cylinder of described sump filter and form filtration circuit with described filter cylinder, described collecting tray is the body structure with vallecular cavity, described collecting tray is offered the multiple row installing hole respectively on the relative lateral body surface, and the spacing of the described installing hole between row of offering on the described opposite side surface and the row does not wait.
Described collecting tray also comprises baffle plate, and described baffle plate sealing is arranged on the opposite side surface relative with described collecting tray one side surface that fixedly mounts described filter cylinder.
Have at least the relative bending place of the described installing hole outline line of row that the interference limit is set on the surface, described collecting tray two opposite sides respectively.
The extension on described interference limit is 20mm.
Described installing hole is that the cross section is regular hexagon, is opened in the through hole structure on described collecting tray surface;
The central shaft line on described interference limit is parallel or vertical with the middle bobbin thread of described collecting tray.
A kind of containment sump filter comprises above-mentioned containment sump filter collecting tray structure.
Described containment sump filter also comprises filter cylinder, and described filter cylinder is the ring-type filtration with double-deck netted filtering surface that the described installing hole contour shape of cross sectional shape and described collecting tray is complementary;
The shape of described installing hole and the corresponding coupling of the shape of described filter cylinder, the base of described filter cylinder is fixed on the described installing hole.
Preferably, described base is foursquare platy structure, and its surface connects waist-shaped hole is set.
Adopt the containment sump filter collecting tray structure of the utility model embodiment, because base fixes by bolt and the installing hole that is preset in the waist-shaped hole, and the relative bending place of right row installing hole outline line is provided with the interference limit respectively, can adjust the spacing of containment sump filter filter cylinder, promoted the strainability of filter cylinder, reduced the mounting arrangements difficulty of containment sump filter, further reduced because of adjusting required material and the processing cost of collecting tray structure, saved loading and unloading, debug time.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with accompanying drawing.
In conjunction with reference to shown in Fig. 1, Fig. 2 a and Fig. 2 b, the containment sump filter collecting tray structure of the utility model embodiment, be used to install and fix the filter cylinder of described sump filter and form filtration circuit with described filter cylinder, described collecting tray structure is offered the multiple row installing hole respectively on the relative lateral body surface, and the spacing of the described installing hole between row of offering on the described opposite side surface and the row does not wait;
The shape of described installing hole and the corresponding coupling of the shape of described filter cylinder, the base of described filter cylinder is fixed on the described installing hole.
Referring to Fig. 3, collecting tray 2 is liquid communication passages that rectangular shape has vallecular cavity, the lateral body surface 21 that it is relative, offer some installing holes 211 on 22 respectively, 221, wherein, installing hole 211,221 are arranged to several rows according to certain order of placement, some row, in the present embodiment, offer 6 installing holes 211 of 3 row, 2 row on the collecting tray 2 lateral body surfaces 21, offer 6 installing holes 221 of 3 row, 2 row equally on the then relative opposite side surface 22 with lateral body surface 21, difference is, surface, collecting tray 2 both sides 21, the spacing of installing hole and unequal between the columns that is provided with on 22, for example, in the foregoing description, the spacing that the 2 row installing holes of offering on the collecting tray 2 lateral body surfaces 21 are 211 is slightly less than the spacing of 221 of the 2 row installing holes offered on the opposite side surface 22, that is to say, when the filter cylinder 1 of filter is fixedly mounted on the installing hole 211 on the lateral body surface 21 by the set bolt correspondence or be fixedly mounted on the installing hole 221 on the lateral body surface 22, fixedly the spacing between filter cylinder 1 bolt is differentiated, and the distance when promptly filter cylinder 1 is fixedly mounted on the installing hole 211 on the lateral body surface 21 by the set bolt correspondence between described set bolt is slightly less than filter cylinder 1 distance between described set bolt when being fixedly mounted on the installing hole 221 on the lateral body surface 22 by the set bolt correspondence.
During concrete enforcement, the quantity and the order of placement of the installing hole of offering on the collecting tray 2 lateral body surfaces 21,22 211,221 do not limit, as long as satisfy on the relative lateral body surface 21,22 and correspondingly to offer the installing hole 211,221 that line number, columns equate, and the row of offering on 211,221 on the opposite side surface do not wait with the spacing of described installing hole between being listed as and get final product.
Preferably, installing hole is that the cross section is regular hexagon, is opened in the through hole structure on described collecting tray surface;
The central shaft line on described interference limit is parallel or vertical with the middle bobbin thread of described collecting tray.
Preferably, collecting tray 2 structures also comprise baffle plate (not shown), described baffle plate (not shown) sealing is arranged on the opposite side surface relative with described collecting tray 2 one side surfaces that fixedly mount filter cylinder, during concrete enforcement, for example, when being fixed on, filter cylinder has suitable row on the collecting tray 2 on a side surface of installing hole 211 21 the time, use baffle plate (not shown) that sealing is replaced on collecting tray 2 opposite side surfaces 22 mutually, promptly the lateral body surface of baffle plate (not shown) fixing seal is relative with the lateral body surface that installs and fixes filter cylinder 1 all the time.Be understandable that baffle plate (not shown) fixing seal does not influence the enforcement of the utility model collecting tray 2 structures on the sidewall of collecting tray 2 outer side surfaces or its inner vallecular cavity.
Among second embodiment of the containment sump filter collecting tray structure of the utility model embodiment, have at least the relative bending place of the described installing hole outline line of row that interference limit 2101 is set on the surface, collecting tray 2 both sides 21,22 respectively.In the present embodiment, in the two row installing holes that on surface, both sides 21,22, are provided with respectively, the cross section of two diagram left sides, one row installing hole all is regular hexagon, and the relative bending place of right row installing hole outline line is provided with interference limit 2101 respectively, and the extension on interference limit 2101 is 20mm.
Filter cylinder 1 is the regular hexagon that cross sectional shape and collecting tray 2 installing holes 211,221 contour shapes are complementary, it is ring-type filtration with double-deck netted filtering surface, the one end is fixedly installed on the base plate 12 that filter cylinder 1 has, and the bolt of described filter cylinder 1 by described base 12 and collecting tray 2 installing holes 211,221 is connected and installed and is fixed on the described collecting tray 2.
Referring to Fig. 4, base 12 is roughly to be foursquare platy structure, and its four corner edge surface symmetry connects through hole 122 is set, and preferred, described through hole 122 is a waist-shaped hole, and it is long and narrow poroid that described waist-shaped hole is.
Tube connector 3 is arranged on collecting tray 2 and offers on the lateral body surface adjacent two relative both sides bodies of installing hole 211,221, the vallecular cavity of itself and collecting tray 2 is conducted, and enters cooling fluid in the collecting tray 2 enters containment sump one loop by the tube connector 3 of mutual conduction pump intake after filter cylinder 1 filters.
The end that bracing frame 4 is positioned at collecting tray 2 play fixed supporting role to containment sump filter, and it is flat platy structure.
The containment sump filter collecting tray structure of the utility model embodiment is when concrete assembling, select a side collecting tray 2 surfaces to install and fix according to the density of 1 needs setting of filter cylinder of containment sump filter with filter cylinder 1, because the filter cylinder 1 of filter is fixedly mounted on the installing hole 211 on the collecting tray 2 lateral body surfaces 21 by the set bolt correspondence or when being fixedly mounted on the installing hole 221 on the collecting tray 2 lateral body surfaces 22, spacing between the set bolt is different, can spacing according to the actual requirements require filter cylinder 1 is installed on the suitable side surface of collecting tray 2 spacings, be lateral body surface 21 or lateral body surface 22, after determining that a side surface 21 or lateral body surface 22 is for the installed surface of filter cylinder 1, use baffle plate (not shown) that sealing is replaced on collecting tray 2 opposite side surfaces mutually, the vallecular cavity of collecting tray 2 becomes one-sided feed liquor structure, and then, install and fix filter cylinder 1, filter cylinder 1 passes through base 12 and collecting tray 2 installing holes 211 separately, 221 bolt is connected and installed and is fixed on the described collecting tray 2, in concrete the enforcement, because base 12 is by being preset at bolt and the installing hole 211 in the waist-shaped hole 122,221 fix, and right row installing hole 211, the bending place that 221 outline lines are relative is provided with interference limit 2101 respectively, the position that makes the right row filter cylinder 1 of diagram fix is adjustable, to reach the effect of regulating filter cylinder 1 spacing.
Adopt the containment sump filter collecting tray structure of the utility model embodiment, because base fixes by bolt and the installing hole that is preset in the waist-shaped hole, and the relative bending place of right row installing hole outline line is provided with the interference limit respectively, can adjust the spacing of containment sump filter filter cylinder, promoted the strainability of filter cylinder, reduced the mounting arrangements difficulty of containment sump filter, further reduced because of adjusting required material and the processing cost of collecting tray structure, saved loading and unloading, debug time.
Above disclosed only is a kind of preferred embodiment of the utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.