WO2017012265A1

WO2017012265A1 - Containment recycling filter

Info

Publication number: WO2017012265A1
Application number: PCT/CN2015/098569
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: CN104971542A; GB2555971A; GB2555971B; CN104971542B; GB201720384D0; GB2555971B8

Abstract

A containment recycling filter comprises a plurality of filtering modules (1), a plurality of connecting modules (2), and at least one pithead module (3). Each filtering module (1) comprises a confluence tank (11) and a plurality of filter cartridges (12). Filter cartridge holes (111a) are provided on the side wall (111) of the confluence tank (11), the filter cartridges (12) are mounted at the filter cartridge holes (111a), and first flange parts (114) are disposed at two ends of the confluence tank (11). Each connecting module (2) comprises a main body (20), elastic sheets (21), and elastomers (22). The main body (20) is of a trapezoidal structure, and second flange parts (23) are disposed at openings at two ends of the main body (20). The elastic sheets (21) are disposed at the outer sides of the second flange parts (23), and the elastomers (22) are clamped between the elastic sheets (21) and the second flange parts (23). A pithead confluence tank (31) of each pithead module (3) is a hollow tank with openings at the two ends and the bottom, and third flange parts (32) are disposed at the openings at the two ends. The pithead module (3) is hermetically mounted at the inlet of a pump, the connecting modules (2) are disposed between two filtering modules (1) or between the filtering modules (1) and the pithead module (3), and the elastic sheets (21) and the elastomers (22) are pressed tightly so as to perform a sealing function.

Description

Containment recirculation filter

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 containment recirculation filter.

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 prior art recirculation filter is composed of a plurality of filter modules, a pipeline module and a sealing structure, wherein the filter module is a core component for filtering, and a plurality of filter modules are arranged in the pit tunnel, the pipeline The module is disposed between the filter modules and located at the pump inlet position in the pit to function as a flow adjustment, and the sealing structure is used to seal the connection position of the filter module with the filter module or with the pipeline module. Such recirculating filters have different specifications, complicated structure, difficulty in processing and installation, and are only arranged for a single working condition, and cannot be arranged in pits of different specifications, and the applicability is low.

Therefore, it is necessary to provide a recirculation filter that can solve the above problems.

Summary of the invention

It is an object of the present invention to provide a recirculation filter having uniform specifications, simple structure, and high applicability.

In order to achieve the above object, the present invention provides a containment recirculation filter comprising a plurality of filter modules, a plurality of connection modules and at least one pit module. The filter module includes a confluence channel and a plurality of filter cartridges, the confluence channel includes two opposite first sidewalls and opposite first and second walls, and the first top wall is coupled to the first side Between the upper ends of the wall, the bottom wall is connected between the lower ends of the two first side walls, the two ends of the confluence groove are open, and the openings at the two ends of the confluence groove are opposite to the first top a first flange portion extending outwardly from the wall, the bottom wall and the first side wall, and at least one of the two first side walls is provided with a plurality of filter cartridge holes, and the plurality of filter cartridges are one by one Correspondingly mounted at the filter bore of the first side wall. The connecting module includes 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 second and third side walls, and two ends of the upper wall are respectively fixed to One end in the height direction of the second side wall and one end in the height direction of the third side wall, and both ends of the lower wall are respectively fixed to the other end in the height direction of the second side wall and the first end The other end of the three side walls in the height direction, the length of the second side wall is smaller than the length of the third side wall, the upper wall and the lower wall are both substantially trapezoidal, and the openings at the two ends of the main body are respectively a second flange portion extending outwardly from the upper wall, the lower wall, the second side wall and the third side wall is disposed, and the outer side of the two second flange portions are provided with the elastic piece And the elastic member, the inner edge of the elastic piece is fixed to the second flange portion, the outer edge of the elastic piece and the second flange portion are spaced apart, and the elastic member is clamped on the Between the elastic piece and the second flange portion. The pit module includes a pit mouth sink, and the pit mouth sink is a hollow box structure with both ends and a bottom opening The second top wall and the opposite two fourth side walls are provided, and the third flange portion of the second top wall and the fourth top wall is folded outwardly from the opening at the two ends of the pit ceiling bus . The pit module is sealingly mounted at the pump inlet and the bottom opening of the pit junction slot is in communication with the pump inlet, each of the connection modules being disposed between two adjacent filter modules or the filter module and the Between the pit modules, the second flange portion is fixedly connected to the first flange portion or the third flange portion, and the elastic piece and the elastic member are pressed against the second flange portion and the first Between the flange portion or the second flange portion.

Compared with the prior art, the filter of the invention is composed of three modules and realizes modularization, and all three modules have uniform specifications, and the production and processing are simple and the cost is low. When the assembly is performed, the pit module corresponds to a pump inlet in the pit, and the connecting module is connected and communicates with the filter module and the pit module to form an integral flow passage, and the connection between adjacent modules passes through the The abutting of the first flange portion, the second flange portion and the third flange portion is realized, and the operation is simple, and at the same time, the elastic piece that has been provided for sealing on the second flange portion and the The elastic member eliminates the need for an additional sealing structure, which reduces the difficulty of installation. In addition, since the main body of the connection module has a trapezoidal structure, and two adjacent filter modules are disposed on both sides of the connection module when installed, all the filter modules and the pit modules can be automatically arranged in an arc shape. Corresponding to the pit porch, the installation is simple. By changing the shape of the main body of the connection module, the same filter module and the pit module can be arranged in different working conditions, and the number of modules can be freely adjusted to improve applicability.

Preferably, the second side wall and the third side wall of the connecting module are convexly disposed with a plurality of studs adjacent to the two second flange portions, and the first flange portion is provided with A positioning card that can be detachably fitted to the stud. After the nut is tightened on the stud, the nut presses the positioning card against the connecting module to achieve the docking and fixing between the first flange portion and the second flange portion.

Specifically, the positioning card is made of a plastic material, one end of the positioning card is fixed to the first flange portion, and the other end of the positioning card is provided with an opening connecting groove, and the stud is connected by the connection The opening of the slot enters the connecting slot to enclose the positioning clip on the stud.

Preferably, the first flange portion, the second flange portion and the third flange portion each have a corresponding annular shape, the number of the elastic piece and the elastic member are two, and the elastic piece and the The elastic member is also a ring structure. The plurality of flange portions are all arranged in a ring shape, which is advantageous for increasing the contact area, thereby making the connection between the two more stable and more favorable for sealing.

Preferably, the pit module further includes a pit base, the intermediate opening of the pit base is sealingly fixed around the pump inlet, and the pit confluence groove is sealingly fixed to the pit base.

Preferably, a plurality of the filter cartridge holes are symmetrically opened on the two first sidewalls of the confluence groove, and the plurality of filter cartridges are correspondingly and symmetrically mounted on the two first sidewalls. The filter cartridge is at the hole. The filter cartridge holes are formed on the two first sidewalls of the confluence groove, so that the confluence trough has a symmetrical structure and is easy to be formed. After the filter cartridge is installed on the two first side walls of the confluence trough, the torque generated by the filter cartridges on both sides of the confluence trough cancel each other, so that the structure of the filter module is stable, and no additional support is needed. The assembly supports the manifold, thereby making the installation of the filter easier.

Specifically, the filter module further includes a vortex grille in a grid structure, the vortex grille being mounted on the first top wall and covering the filter cartridge.

More specifically, the number of the anti-vortex grids is two, and one ends of the two anti-vortex grids are respectively fixed on the first top wall and respectively extend to the outer sides of the two first side walls, and the two The vortex barriers are respectively covered above the filter cartridges on the corresponding two first side walls. When the filter is in operation, the vortex formed above the filter cartridge reduces the working efficiency of the filter, so that the anti-vortex grille can be provided to effectively reduce the formation of vortices.

Further, the filter module further includes a plurality of connecting members, wherein two ends of the connecting member respectively form a connecting through hole; the first top wall is spaced apart from the two rows of protruding studs, the anti-verting grid One end of the grid is provided with a row of through holes; two rows of the studs respectively pass through the two vortex prevention The through hole of the grille, the two ends of the connecting member are press-fitted onto the two vortex grills, and the two studs corresponding to the positions of the two rows of the studs respectively pass through the two connecting connections Through hole.

Further, the end of the vortex grille is fixed with a support rod extending downward.

Preferably, the filter module further includes two bases, and two ends of the bottom wall are respectively fixed with a bottom plate, and the two bottom plates are respectively detachably connected to the two bases.

Specifically, the two ends of the base are provided with protruding studs, and the two ends of the bottom plate correspondingly open through holes for the studs to pass through. When the filter module is installed, the base is fixed into the pit, and the bus groove is placed on the base, so that the stud on the base passes through the through hole in the bottom plate, and then The nut is screwed onto the stud to fix the confluence groove in the pit, and the installation process is simple.

Preferably, a plurality of outwardly projecting studs are disposed around each of the filter cartridge holes, and one end of the filter cartridge has a connecting portion that is attached to the first sidewall, and the connecting portion corresponds to A plurality of through holes are provided for the studs to pass through.

Preferably, the filter cartridge is an inner and outer double layer filter structure. The arrangement of the filter cartridge as a double-layered screen structure facilitates the filtration efficiency of the unit length filter.

Preferably, 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 in an arc shape and accommodates the elastic member, which is advantageous for securing the elastic member between the elastic piece and the second flange portion.

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 second 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 second flange portions. The function of the lower reinforcing rib is to enhance the structural strength of the connecting module.

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

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a single row of containment recirculation filters of the present invention.

2 is a perspective view of a filtration module in a containment recirculation filter of the present invention.

Figure 3 is a side view of the filter module.

4 is a perspective view of a manifold in a filter module.

Figure 5 is an exploded view of the filter cartridge in the filter module.

Figure 6 is a perspective view of the base of the filter module.

Figure 7 is a schematic illustration of the vortex barrier and the connector in the filter module.

Figure 8 is a perspective view of the connection module in the containment recirculation filter of the present invention.

Figure 9 is a partial exploded view of the connection module.

Figure 10 is a plan view of the connection module.

Figure 11 is a perspective view of the pit module in the containment recirculation filter of the present invention.

Figure 12 is a schematic view showing the connection of two adjacent filtration modules in the containment recirculation filter 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.

As shown in FIG. 1, the present invention provides a containment recirculation filter comprising a plurality of filter modules 1, a plurality of connection modules 2 and at least one pit module 3. The filter module 1, the connection module 2 and the pit module 3 are arranged in the safety enclosure pit corridor and communicated into a first-class road, wherein the filter module 1 acts as a filter, and the connection module 2 is used to connect adjacent identical or different modules and can As a pipe module, the pit module 3 is installed at the pump inlet in the pit. The containment recirculation filter in this embodiment is presented in a single column, which specifically includes six filter modules 1, six connection modules 2, and one pit module 3. The specific structure of these three modules will be described in detail below, and the connection relationship between the modules will be described.

As shown in FIG. 2 and FIG. 3, the filter module 1 includes a confluence channel 11, a plurality of filter cartridges 12, two anti-vortex grids 13, a plurality of connecting members 14, and two bases 15.

As shown in FIG. 4, the confluence channel 11 has a box structure with open ends and includes two opposite first side walls 111 and opposite first top wall 112 and bottom wall 113. The first top wall 112 is connected to the two sides. Between the upper ends of one side wall 111, the bottom wall 113 is connected between the lower ends of the two first side walls 111. A first flange portion 114 extending outwardly from the first top wall 112, the bottom wall 113 and the first side wall 111 is disposed at an opening at both ends of the bus groove 11. The first flange portion 114 surrounds the end of the confluence channel 11. The first flange portion 114 includes two opposite short sides and two opposite long sides, and the upper and lower ends of the two long sides are respectively provided with a piece of positioning card 115, one end of the positioning card 115. The first flange portion 114 is fixed to the first flange portion 114, and the other end of the positioning card 115 is provided with an opening connecting groove 115a. The positioning card is made of a plastic material so that it can be pulled.

Two rows of raised studs 112a are disposed at intervals on the first top wall 112. Each row of studs 112a includes a plurality of studs 112a positioned adjacent to the two first side walls 111, respectively, and the studs 112a The arrangement direction is substantially parallel to the longitudinal direction of the first side wall 111, and the two rows of studs 112a are symmetrically disposed on the first top wall 112. In this embodiment, the number of each row of studs 112a is four. A bottom plate 116 is fixed to the two ends of the bottom wall 113. The bottom plate 116 is located adjacent to the opening of the bus bar 11 and can abut against the first flange portion 114. The two ends of the bottom plate 116 respectively protrude from the first sidewall 111. Further, the two ends of the bottom plate 116 are respectively provided with through holes 116a.

The two first side walls 111 are respectively provided with a plurality of filter cylinder holes 111a, and the two first side walls 111 are symmetrically disposed, that is, the positions of the filter cylinder holes 111a on the two first side walls 111 are in one-to-one correspondence. Preferably, the filter cartridge holes 111a are arranged in an array. Specifically, each of the first sidewalls 111 has three rows and four columns of filter cartridge holes 111a for a total of twelve. The shape of the cartridge bore 11a is hexagonal. Four outwardly projecting studs 111h are disposed around each of the filter cartridge holes 111a. Referring to FIG. 3, in order to increase the structural strength of the busbar 11, a plurality of crossbars 117 may be disposed between the two first sidewalls 111. The two ends of the crossbar 117 are respectively fixed to the inner surfaces of the two first sidewalls 111. Therefore, a connection relationship is formed between the two first side walls 111 to prevent the first side wall 111 from being deformed by force.

Referring to FIG. 2 and FIG. 4 and FIG. 5, a plurality of filter cartridges 12 are mounted one by one in the filter cartridge holes 111a of the two first side walls 111, so that the number of the filter cartridges 12 is 24 in this embodiment. The filter cartridge 12 has a hexagonal prism structure corresponding to the cartridge hole 111a, and has a square plate-like connecting portion 121 at one end thereof, and through holes 121a are formed at four corners of the connecting portion 121. When the filter cartridge 12 is installed, the position of the filter cartridge 12 is opposite to the position of the cartridge hole 111a on the first side wall 111 and the connecting portion 121 is attached to the first side wall 111 so that four around the filter cartridge hole 111a The studs 111h respectively pass through the four through holes 121a of the connecting portion 121, and then are respectively screwed onto the four studs 111h by four nuts, and the filter cartridge 12 is fixed to the first side wall 111 when the nut is tightened. Repeat the above installation steps to complete the installation of all 24 filter cartridges 12.

In order to enhance the filtering effect under the premise that the length of the filter cartridge 12 is constant, the filter cartridge 12 is set as an inner and outer double layer in this embodiment. The structure of the filter. Specifically, the filter cartridge 12 includes an outer filter screen 122 and an inner filter screen 123 in the shape of a hexagonal prism. The inner filter screen 123 is disposed inside the outer filter screen 122 and each surface of the inner screen 123 is parallel to the corresponding surface of the outer screen 122. And having a spacing, a six-sided annular section 124 is formed between the inner screen 123 and the outer screen 122. Both ends of the inner screen 123 and the outer screen 122 are open, and the connecting portion 121 is formed on the outer side surface of the rear end of the outer screen 122 and extends outward so as not to affect the opening of the outer screen 122. The filter cartridge 12 further includes a front cover plate 125 and a rear cover plate 126, wherein the front cover plate 125 has an annular shape corresponding to the annular section 124, and the rear cover plate 126 has a hexagonal shape corresponding to the opening of the inner screen 123. The front cover 125 is fixed to the front end of the outer screen 122 and the front end of the inner screen 123 so as to close the opening at the end of the annular section 124. The rear cover 126 is fixed to the rear end of the inner screen 123 to close the opening at the rear end of the inner screen 123. The rear cover 126 does not shield the opening at the rear end of the annular section 124. After the filter cartridge 12 is mounted on the manifold 11, the annular section 124 can communicate with the internal space of the manifold 11 through the cartridge bore 111a. The filtered water enters the annular section 124 through the holes in the outer screen 122, passes through the outer screen 122 and the inner screen 123, and then flows into the confluence channel 11.

Referring to FIG. 6 and FIG. 4, the two ends of the top of the base 15 are provided with raised studs 151. The distance between the two studs 151 is the same as the distance between the two through holes 116a of the bottom plate 116. The function of the base 15 is The bustling groove 11 is supported to securely and firmly fix the bustling groove 11 to the ground in the pit. When the filter module 1 is installed, the two bases 15 are first fixed to the ground in the pit by welding or the like, and then the bus groove 11 is placed on the two bases 15 so that the studs 151 on the base 15 pass through the bottom plate 116. The through hole 116a is screwed onto the stud 151 by a nut, thereby fixing the confluence groove 11 in the pit, and the installation process is simple. As a more preferred arrangement, the through hole 116a of the bottom plate 116 can be arranged as an elongated hole, so that the stud 151 on the base 15 can slide in the through hole 116a, so that the position of the bus groove 11 can be finely adjusted. .

Referring to FIG. 7 and in conjunction with FIG. 2, the two vortex barriers 13 have a grid structure, and one end of the vortex grille 13 is provided with a row of through holes (not shown). The number of the through holes is four and the position can be One corresponding to the studs 112a on the first top wall 112. The connecting member 14 is connected to the stud 112a on the first top wall 112 and fixes the two vortex grills 13 on the confluence groove 11, so that the number of the connecting members 14 in the embodiment is also four. The connecting member 14 is an elongated plate-like structure, and through holes 141 are respectively formed at both ends thereof. After the bus bar 11 is installed in position, one ends of the two anti-vortex grilles 13 through which the through holes are opened are respectively mounted on the first top wall 112, so that the two rows of studs 112a pass through the two rows of through holes of the two anti-vortex grills 13 Then, the four connecting members 14 are pressed onto the two vortex grids 13, so that the two through holes 141 of each of the connecting members 14 are passed through by two corresponding positions in the two rows of studs 112a. Then, the nut is tightened to the stud 112a, and the vortex grill 13 can be fixed to the bus groove 11 through the connecting member 14. After the two vortex grills 13 are fixed, they extend toward the outside of the two first side walls 111 and are respectively disposed above the filter cartridges 12 on the corresponding two first side walls 111. Since the anti-vortex grille 13 has only one end fixed, in order to prevent it from contacting the filter cartridge 12 downward, a downwardly extending support rod 16 is fixed at one end of its suspension, and the support rod 16 is supported on the bottom surface of the pit to prevent the anti-vortex grille 13 Falling down. In a specific implementation, the anti-vortex grid 13 is formed by intersecting two materials of longitudinal and transverse directions, wherein the longitudinal direction is a flat steel of 30 mm×5 mm, and the transverse direction is a twisted steel. The square size of the flat steel and the twisted steel is 100 mm × 30 mm.

As shown in FIG. 8 to FIG. 10 , the 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 that surrounds the cavity in the middle and includes opposite and parallel upper and

lower walls

201 and 202, and second and

second side walls

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

A second flange portion 23 extending outwardly from the upper wall 201, the lower wall 202, the second side wall 203 and the third side wall 204 is respectively disposed at the opening of the two ends of the main body 20, and the second flange portion 23 is surrounded. The end of the body 20 has a rectangular annular structure that is open, and the second flange portion 23 is the same size as the first flange portion 114.

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 second 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 second flange portions 23. Two side reinforcing ribs 206 are respectively disposed on the second side wall 203 and the third side wall 204, and two ends of the side reinforcing ribs 206 are respectively fixed to the two second 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. The height positions of the two side reinforcing ribs 206 respectively correspond to the height positions of the two positioning cards 115 on the first flange portion 114, and convex studs 206a are respectively disposed at both ends of each side reinforcing rib 206.

In the embodiment, the elastic piece 21 and the elastic member 22 each have a rectangular annular structure having the same size as the second flange portion 23. Therefore, 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 second flange portion 23, and the other elastic piece 21 and the other elastic member 22 are disposed on the other second flange portion 23. The inner edge of the elastic piece 21 is fixed to the outer side surface of the second flange portion 23 by means of welding or the like, and the outer edge of the elastic piece 21 and the second 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 received 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 second 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.

As shown in FIG. 11, the crater module 3 includes a sump sump 31, which is a hollow box structure with two ends and a bottom opening, and includes a second top wall 311 and two opposite fourth side walls 312. A third flange portion 32 extending outwardly from the second top wall 311 and the fourth top wall is disposed at the opening of the two ends, and the third flange portion 32 is also opposite to the first flange portion 114 and the second flange. The portion 23 has the same size and a ring shape. The recirculated water flowing into the pit venting groove 31 from the opening at both ends flows into the pump inlet from the bottom opening thereof.

Referring back to FIG. 1, the mouth opening module 3 further includes a pit base 33, an intermediate opening (not shown) of the pit base 33 and sealingly fixed around the pump inlet, and the pit mouth groove 31 is sealingly fixed to the pit base 33. . The pit base 33 can be pre-mounted and re-supported by the pit junction groove 31, so that the pit junction groove 31 is accurately and firmly fixed above the pump inlet.

1, 4, 8 and 12, the adjacent two filter modules 1 are connected by a connection module 2, and the pit module 3 is also connected to the two filter modules 1 on both sides thereof through the two connection modules 2. For example, the first flange portion 114 of the bus bar 11 of the filter module 1 is aligned with the second flange portion 23 of the connection module 2 and is in close contact with each other, and the first flange portion 114 is placed on the first flange portion 114. The positioning card 115 is pulled to the side of the connecting module 2, so that the stud 206a on the connecting module 2 side reinforcing rib 206 enters the connecting groove 115a from the opening of the connecting groove 115a, that is, the positioning card 115 is sleeved on the stud 206a. on. Then, the nut is screwed onto the stud 206a. The tightened nut presses the positioning card 115 against the side reinforcing rib 206 to realize the abutting and fixing of the first flange portion 114 and the second flange portion 23. At this time, the elastic piece 21 and the elastic member 22 on the second flange portion 23 are pressed between the second flange portion 23 and the first flange portion 114 to function as a seal. On the other side of this connection module 2, another filter module 1 is connected to the connection module 2 in the same manner. For the crater module 3, a structure similar to that of the positioning card 115 can be disposed on the third flange portion 32, thereby completing the docking and fixing of the third flange portion 32 and the second flange portion 23, thereby realizing the connection of the crater module 3 and the connection. Module 2 connection.

After the installation is completed, the openings surrounded by the first flange portion 114 at the ends of each of the filter modules 1 are respectively communicated with the openings of the ends of the main body 20 of the two connection modules 2 by the second flange portion 23, and the modules are connected at the same time. 2 The opening of the end of the main body 20 surrounded by the second flange portion 23 communicates with the opening of the mouth opening module 31 of the pit module 3 by the third flange portion 32, and further in all the filter modules 1, the connection module 2 and the pit module A complete flow path is formed between 3. The coolant flowing into the pit of the containment vessel enters the annular section 124 by the hole in the filter cartridge 12 and is filtered, and the filtered recirculated water flows into the pit venting groove 31 in the flow path formed by the header groove 11 and the main body 20, and enters Pump inlet to achieve weight Reuse.

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 filter of the invention is composed of three modules and realizes modularization, and all three modules have uniform specifications, and the production and processing are simple and the cost is low. When assembling, the pit module 3 corresponds to the pump inlet in the pit, the connecting module 2 functions as a whole and connects to the filter module 1 and the pit module 3 to form an integral flow passage, and the connection between adjacent modules passes through the first flange. The abutment of the portion 114, the second flange portion 23 and the third flange portion 32 is realized, and the operation is simple. At the same time, since the elastic piece 21 and the elastic member 22 which are used for sealing are already disposed on the second flange portion 23, no additional setting is required. The sealing structure reduces the difficulty of installation. In addition, since the main body 20 of the connection module 2 has a trapezoidal structure, and two adjacent filter modules 1 are disposed on both sides of a connection module 2, all the filter modules 1 and the port module 3 can be automatically arranged in an arc shape. Corresponding to the pit porch, the installation is simple. By changing the shape of the main body 20 of the connection module 2, the same filter module 1 and the pit module 3 can be arranged in different working conditions, and the number of modules can be freely adjusted to improve applicability.

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, comprising: a plurality of filter modules, a plurality of connection modules and at least one pit module;

The filter module includes a confluence channel and a plurality of filter cartridges, the confluence channel includes two opposite first sidewalls and opposite first and second walls, and the first top wall is coupled to the first side Between the upper ends of the wall, the bottom wall is connected between the lower ends of the two first side walls, the two ends of the confluence groove are open, and the openings at the two ends of the confluence groove are opposite to the first top a first flange portion extending outwardly from the wall, the bottom wall and the first side wall, and at least one of the two first side walls is provided with a plurality of filter cartridge holes, and the plurality of filter cartridges are one by one Correspondingly installed at the filter hole of the first side wall;

The connecting module includes 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 second and third side walls, and two ends of the upper wall are respectively fixed to One end in the height direction of the second side wall and one end in the height direction of the third side wall, and both ends of the lower wall are respectively fixed to the other end in the height direction of the second side wall and the first end The other end of the three side walls in the height direction, the length of the second side wall is smaller than the length of the third side wall, the upper wall and the lower wall are both substantially trapezoidal, and the openings at the two ends of the main body are respectively a second flange portion extending outwardly from the upper wall, the lower wall, the second side wall and the third side wall is disposed, and the outer side of the two second flange portions are provided with the elastic piece And the elastic member, the inner edge of the elastic piece is fixed to the second flange portion, the outer edge of the elastic piece and the second flange portion are spaced apart, and the elastic member is clamped on the Between the elastic piece and the second flange portion;

The crater module includes a sump sump, the sump sump is a hollow box structure with two ends and a bottom opening, and includes a second top wall and two opposite fourth side walls, and the openings at the two ends of the sump convergence groove are disposed a third flange portion extending outwardly relative to the second top wall and the fourth top wall;

The pit module is sealingly mounted at the pump inlet and the bottom opening of the pit junction slot is in communication with the pump inlet, each of the connection modules being disposed between two adjacent filter modules or the filter module and the Between the pit modules, the second flange portion is fixedly connected to the first flange portion or the third flange portion, and the elastic piece and the elastic member are pressed against the second flange portion and the first Between the flange portion or the second flange portion.
The containment recirculation filter according to claim 1, wherein the second side wall and the third side wall of the connecting module are convexly disposed adjacent to the two second flange portions. a plurality of studs, wherein the first flange portion is provided with a positioning card detachably sleeved on the stud.
A containment recirculation filter according to claim 2, wherein said positioning card is made of a plastic material, one end of said positioning card is fixed to said first flange portion, and said positioning card is further One end is provided with an opening connecting groove, and the stud enters the connecting groove from the opening of the connecting groove to fit the positioning clip to the stud.
The containment recirculation filter according to claim 1, wherein said first flange portion, said second flange portion and said third flange portion each have a corresponding annular shape, said elastic piece and said elasticity The number of pieces is two, and the elastic piece and the elastic piece are also annular structures.
A containment recirculation filter according to claim 1 wherein said crater module further comprises a crater base, said vent base having an intermediate opening and sealingly secured about the pump inlet, said crater The manifold is sealingly fixed to the pit base.
The containment recirculation filter according to claim 1, wherein a plurality of said filter cylinder holes are symmetrically opened on each of said first side walls of said manifold, and said plurality of filter cartridges are one by one Correspondingly and symmetrically mounted at the filter bores of the two first side walls.
A containment recirculation filter according to claim 6, wherein said filter module further comprises a vortex grille in a lattice structure, said vortex grille being mounted on said first top wall and Covered above the filter cartridge.
The containment recirculation filter according to claim 7, wherein the number of the anti-vortex grids is two, and one ends of the two anti-vortex grids are respectively fixed on the first top wall and respectively An outer side of the two first side walls extends, and the two anti-vortex grids respectively cover the filter cartridges on the corresponding two first side walls.
The containment recirculation filter according to claim 8, wherein the filter module further comprises a plurality of connecting members, wherein two ends of the connecting member respectively define a connecting through hole; the first top wall is spaced apart Two rows of raised studs are disposed, one end of the anti-vortex grille is provided with a row of through holes; the two rows of the studs respectively pass through the through holes of the two anti-vortex grills, the connecting member The two ends of the two rows of the studs are respectively pressed into the two through-holes.
A containment recirculation filter according to claim 8, wherein the end of said vortex grille is fixed with a support rod extending downward.
The containment recirculation filter according to claim 1, wherein the filter module further comprises two bases, and two ends of the bottom wall are respectively fixed with a bottom plate, and the two bottom plates respectively have two bases The seat is detachable.
The containment recirculation filter according to claim 11, wherein both ends of the base are provided with raised studs, and two ends of the bottom plate are correspondingly opened for the studs to pass through. hole.
The containment recirculation filter according to claim 1, wherein a plurality of outwardly projecting studs are disposed around each of the filter cartridge holes, and one end of the filter cartridge has a fitting to the a connecting portion on the first side wall, the connecting portion correspondingly opening a plurality of through holes through which the studs pass through.
A containment recirculation filter according to claim 1 wherein said filter cartridge is an inner and outer double layer filter structure.
A containment recirculation filter according to claim 1, 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.
A containment recirculation filter according to claim 15, wherein said elastic member is a metal mesh cord which is rolled from a metal mesh and which is joined end to end.
A containment recirculation filter according to claim 1, wherein said upper wall is provided with upper reinforcing ribs, and both ends of said upper reinforcing rib are respectively fixed to said two second flange portions.
The containment recirculation filter 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 second flange portions.
The containment recirculation filter according to claim 1, wherein the second side wall and the third side wall are respectively provided with side reinforcing ribs, and both ends of the side reinforcing ribs are respectively fixed to Two of the second flange portions.