Pit filter

Abstract

The utility model belongs to the technical field of nuclear power station filtering instruments, and particularly relates to a pit filter. The pit filter comprises a base and a plurality of filter assemblies mounted on the base, and a liquid discharge hole and a plurality of first through holes communicated with the liquid discharge hole are formed in the base; the filter assembly comprises a vortex generator, an outer filter cartridge provided with a first inner hole and an inner filter cartridge provided with a second inner hole, the side wall of the outer filter cartridge is full of first filter holes, and the side wall of the inner filter cartridge is full of second filter holes; the inner filter cartridge is mounted in the first inner hole, and the vortex generator is mounted in the second inner hole; according to the utility model, the vortex generator can rotate in the second inner hole of the inner filter cartridge, so that both the inner filter cartridge and the outer filter cartridge are in a vortex environment, and a plugging object attached to the inner filter cartridge and / or the outer filter cartridge falls off; and the filtering effects of the outer filter cartridge and the inner filter cartridge are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of nuclear power plant filtering equipment, in particular to a pit filter. Background Art

[0002] The pit located at the bottom of the reactor containment of a pressurized water reactor nuclear power plant is used to collect coolant from the primary circuit in case of major leakage. After a baseline accident (such as coolant loss accident, main steam pipe rupture accident, etc.) occurs in a pressurized water reactor nuclear power plant, the coolant enters the containment pit through the rupture. These coolants will be filtered through the containment pit filter, and then enter the safety injection system and safety spray system through pumps and other devices, and then used for reactor cooling to avoid serious damage to the core and overpressure in the containment.

[0003] Therefore, the containment pit filter is an important equipment of the safety system of the pressurized water reactor nuclear power plant. The working condition of the containment pit filter under the cycle condition will directly affect the normal operation of the safety injection system and the safety spray system. After the accident, the coolant entering the containment pit is mixed with a large amount of insulation materials and other material fragments. These substances must be filtered out through the pit filter to ensure the safe execution of the safety injection system and the containment spray system.

[0004] In the prior art, a pit filter generally includes a base and a plurality of filter modules fixedly mounted on the base, and the filter modules are covered with filter holes. After the pit filter is used for a long time, the filter holes on the filter modules are easily blocked by impurities, resulting in poor filtering effect of the pit filter. Utility Model Content

[0005] The utility model aims to solve the technical problem that the pit filter in the prior art is easily blocked by impurities and provides a pit filter.

[0006] In view of the above technical problems, an embodiment of the utility model provides a pit filter, comprising a base and a plurality of filter components mounted on the base, wherein the base is provided with a drainage hole and a plurality of first through holes connected to the drainage hole;

[0007] The filter assembly comprises a vortex generator, an outer filter cartridge with a first inner hole, and an inner filter cartridge with a second inner hole, the side wall of the outer filter cartridge is covered with first filter holes connected to the first inner hole, and the side wall of the inner filter cartridge is covered with second filter holes connected to the second inner hole; the inner filter cartridge is installed in the first inner hole, and the vortex generator is installed in the second inner hole;

[0008] The first inner hole and the second inner hole are both connected to the drainage hole through the first through hole, and the first inner hole, the second inner hole and the first through hole are arranged in a one-to-one correspondence.

[0009] Optionally, the base includes a box body and a support frame installed on the box body, the drainage hole and the first through hole are both arranged on the box body, the outer filter cartridge is fixedly installed on the box body, and the inner filter cartridge is fixedly installed on the support frame.

[0010] Optionally, a plurality of positioning grooves are provided on the outer side wall of the box body and are spaced apart from each other, and the first through holes are provided on the bottom walls of the positioning grooves in a one-to-one correspondence;

[0011] The outer filter cartridge is also provided with a fixed flange, and the fixed flange is fixedly installed in the positioning groove.

[0012] Optionally, the base further comprises a partition installed in the drainage hole, the partition is used to separate the drainage hole into a first space and a second space, the first through hole is connected to the first space; a second through hole is provided on the partition to connect the first space and the second space;

[0013] The vortex generator is fixedly mounted on the partition plate and extends into the second inner hole.

[0014] Optionally, the first end of the inner filter cartridge is fixedly mounted on the support frame, and the second end of the inner filter cartridge is fixedly mounted on the partition plate, and the first end and the second end are opposite ends of the inner filter cartridge in the axial direction.

[0015] Optionally, a first opening and a second opening are respectively provided at opposite ends of the box body, and both the first opening and the second opening are connected to the drainage hole.

[0016] Optionally, the box body is further provided with a first flange arranged around the first opening, and a second flange arranged around the second opening.

[0017] Optionally, the vortex generator includes a rotary drive member and a stirring frame installed at an output end of the rotary drive member.

[0018] In the utility model, the filter assembly includes a vortex generator, an outer filter cartridge with a first inner hole, and an inner filter cartridge with a second inner hole, the side wall of the outer filter cartridge is covered with first filter holes connected to the first inner hole, and the side wall of the inner filter cartridge is covered with second filter holes connected to the second inner hole; the inner filter cartridge is installed in the first inner hole, and the vortex generator is installed in the second inner hole; during the process of the outer filter cartridge and the inner filter cartridge filtering the liquid, the vortex generator can rotate in the second inner hole of the inner filter cartridge, so that the inner filter cartridge and the outer filter cartridge are both in a vortex environment, so that the blockage attached to the inner filter cartridge and / or the outer filter cartridge falls off, thereby ensuring the filtering effect of the outer filter cartridge and the inner filter cartridge, thereby ensuring the filtering effect of the pit filter, and facilitating the cleaning of the pit filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the structure of a pit filter provided by an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a base of a pit filter provided by an embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of a filter cartridge assembly of a pit filter provided by an embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the exploded structure of a filter cartridge assembly of a pit filter provided in one embodiment of the utility model.

[0024] The reference numerals in the specification are as follows:

[0025] 1. Base; 11. Drain hole; 12. First through hole; 13. Box body; 131. Positioning groove; 132. First flange; 133. Second flange; 14. Support frame; 15. Partition plate; 151. Second through hole; 2. Filter assembly; 21. Vortex generator; 211. Rotating drive member; 212. Stirring frame; 22. External filter cartridge; 221. First inner hole; 222. First filter hole; 223. Fixed flange; 23. Internal filter cartridge; 231. Second filter hole. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation of the present invention.

[0028] like Figures 1 to 4 As shown, a pit filter provided by one embodiment of the utility model includes a base 1 and a plurality of filter components 2 installed on the base 1, the base 1 is provided with a drainage hole 11 and a plurality of first through holes 12 connected to the drainage hole 11; it can be understood that the number of the filter components 2 can be set according to actual needs, for example, the filter components 2 are provided with 6, 8, 10, etc.

[0029] The filter assembly 2 includes a vortex generator 21, an outer filter cartridge 22 having a first inner hole 221, and an inner filter cartridge 23 having a second inner hole. The side wall of the outer filter cartridge 22 is covered with first filter holes 222 connected to the first inner hole 221, and the side wall of the inner filter cartridge 23 is covered with second filter holes 231 connected to the second inner hole; the inner filter cartridge 23 is installed in the first inner hole 221, and the vortex generator 21 is installed in the second inner hole; it can be understood that the vortex generator 21 is a conventional component in the present technical field, and different vortex generators 21 can be selected according to different needs; the outer filter cartridge 22 and the inner filter cartridge 23 are coaxially arranged.

[0030] The first inner hole 221 and the second inner hole are both connected to the drainage hole 11 through the first through hole 12 , and the first inner hole 221 , the second inner hole and the first through hole 12 are arranged in a one-to-one correspondence.

[0031] Specifically, the liquid in the pit of the containment vessel of a pressurized water reactor nuclear power plant passes through the first filter hole 222 on the outer filter cartridge 22 and / or the second filter hole 231 on the inner filter cartridge 23, and then enters the drainage hole 11 through the first through hole 12; a water pump can be installed on the base 1, and the inlet of the water pump is connected to the drainage hole 11, so that the water pump can transport the filtered liquid in the drainage hole 11 to the nuclear safety injection system, the safety spray system and other nuclear power plant water systems, thereby ensuring that there are no impurities such as debris in the liquid entering the nuclear power plant water system, thereby ensuring the safety of the nuclear power plant water system.

[0032] In the utility model, the filter assembly 2 includes a vortex generator 21, an outer filter cartridge 22 provided with a first inner hole 221, and an inner filter cartridge 23 provided with a second inner hole, the side wall of the outer filter cartridge 22 is covered with first filter holes 222 connected to the first inner hole 221, and the side wall of the inner filter cartridge 23 is covered with second filter holes 231 connected to the second inner hole; the inner filter cartridge 23 is installed in the first inner hole 221, and the vortex generator 21 is installed in the second inner hole; during the process of the outer filter cartridge 22 and the inner filter cartridge 23 filtering the liquid, the vortex generator 21 can rotate in the second inner hole of the inner filter cartridge 23, so that the inner filter cartridge 23 and the outer filter cartridge 22 are both in a vortex environment, so that the blockage attached to the inner filter cartridge 23 and / or the outer filter cartridge 22 falls off, ensuring the filtering effect of the outer filter cartridge 22 and the inner filter cartridge 23, thereby ensuring the filtering effect of the pit filter, and facilitating the cleaning of the pit filter.

[0033] In one embodiment, if Figure 1 and Figure 2 As shown, the base 1 includes a housing 13 and a support frame 14 mounted on the housing 13, the drainage hole 11 and the first through hole 12 are both arranged on the housing 13, the outer filter cartridge 22 is fixedly mounted on the housing 13, and the inner filter cartridge 23 is fixedly mounted on the support frame 14. It can be understood that the support frame 14 and the housing 13 can be fixedly connected by screws, bolts, etc. In this embodiment, the housing 13 can support the outer filter cartridge 22, and the support frame 14 can support the inner filter cartridge 23, so that the inner filter cartridge 23 and the outer filter cartridge 22 can be supported by different components, thereby ensuring the stability of the filter assembly 2 installed on the base 1.

[0034] In one embodiment, if Figure 1 and Figure 2As shown, the outer wall of the housing 13 is provided with a plurality of positioning grooves 131 distributed at intervals, and the first through holes 12 are arranged one by one on the bottom wall of the positioning grooves 131; the outer filter cartridge 22 is also provided with a fixing flange 223, and the fixing flange 223 is fixedly installed in the positioning groove 131. It can be understood that the positioning groove 131 is arranged on the side of the housing 13, the fixing flange 223 is provided with a first fixing hole, and the bottom wall of the positioning groove 131 is provided with a second fixing hole, and the fixing flange 223 is fixedly installed in the positioning groove 131 by a fixing member (screw, bolt, etc.) inserted into the first fixing hole and the second fixing hole, and the fixing flange 223 is flush with the outer surface of the housing 13. In this embodiment, the design of the fixing flange 223 facilitates the installation of the outer filter cartridge 22 on the housing 13.

[0035] In one embodiment, if Figure 1 and Figure 2 As shown, the base 1 also includes a partition 15 installed in the drainage hole 11, and the partition 15 is used to separate the drainage hole 11 into a first space and a second space, and the first through hole 12 is connected to the first space; the partition 15 is provided with a second through hole 151 connecting the first space and the second space; the vortex generator 21 is fixedly installed on the partition 15 and extends into the second inner hole.

[0036] It can be understood that the vortex generator 21 is fixed on the partition 15, so that the base 1 can play a role in supporting the vortex generator 21, ensuring the stability of the vortex generator 21 when working.

[0037] In one embodiment, if Figure 1 As shown, the first end of the inner filter cartridge 23 is fixedly mounted on the support frame 14, and the second end of the inner filter cartridge 23 is fixedly mounted on the partition 15, and the first end and the second end are two opposite ends of the inner filter cartridge 23 in the axial direction. It can be understood that one end of the inner filter cartridge 23 is fixed on the support frame 14, and the other end of the inner filter cartridge 23 is fixed on the partition 15, so that the support frame 14 and the partition 15 can both play a role in supporting the inner filter cartridge 23, further ensuring the stability of the inner filter cartridge 23 installed on the base 1.

[0038] In one embodiment, if Figure 1 and Figure 2 As shown, the box body 13 is provided with a first opening and a second opening at opposite ends thereof, and the first opening and the second opening are both connected to the liquid discharge hole 11. It can be understood that the liquid in the liquid discharge hole 11 can be discharged through the first opening and the second opening.

[0039] In one embodiment, if Figure 1 and Figure 2 As shown, the box body 13 is also provided with a first flange 132 arranged around the first opening, and a second flange 133 arranged around the second opening. It can be understood that the first flange 132 and the second flange 133 are respectively arranged at opposite ends of the box body 13, and the design of the first flange 132 and the second flange 133 facilitates the docking of the box body 13 with external devices.

[0040] In one embodiment, if Figure 4 As shown, the vortex generator 21 includes a rotating drive member 211 and a stirring frame 212 installed at the output end of the rotating drive member 211. It can be understood that the rotating drive member 211 includes but is not limited to a rotating motor, etc. The rotating drive member 211 can drive the stirring frame 212 to rotate in the second inner hole, and the stirring frame 212 can stir the liquid in the second inner hole and form a vortex, so that the outer filter cartridge 22 and the inner filter cartridge 23 are both in a vortex environment. In this embodiment, the vortex generator 21 has a simple structure and low manufacturing cost.

[0041] The above are merely embodiments of the pit filter of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pit filter, characterized in that: It comprises a base and a plurality of filter components mounted on the base, wherein the base is provided with a drainage hole and a plurality of first through holes connected to the drainage hole; The filter assembly comprises a vortex generator, an outer filter cartridge with a first inner hole, and an inner filter cartridge with a second inner hole, the side wall of the outer filter cartridge is covered with first filter holes connected to the first inner hole, and the side wall of the inner filter cartridge is covered with second filter holes connected to the second inner hole; the inner filter cartridge is installed in the first inner hole, and the vortex generator is installed in the second inner hole; The first inner hole and the second inner hole are both connected to the drainage hole through the first through hole, and the first inner hole, the second inner hole and the first through hole are arranged in a one-to-one correspondence.

2. The pit filter according to claim 1, characterized in that: The base includes a box body and a support frame installed on the box body, the drainage hole and the first through hole are both arranged on the box body, the outer filter cartridge is fixedly installed on the box body, and the inner filter cartridge is fixedly installed on the support frame.

3. The pit filter according to claim 2, characterized in that: The outer side wall of the box body is provided with a plurality of positioning grooves which are spaced apart from each other, and the first through holes are arranged on the bottom walls of the positioning grooves in a one-to-one correspondence; The outer filter cartridge is also provided with a fixed flange, and the fixed flange is fixedly installed in the positioning groove.

4. The pit filter according to claim 2, characterized in that: The base further comprises a partition installed in the drainage hole, the partition is used to separate the drainage hole into a first space and a second space, the first through hole is connected to the first space; the partition is provided with a second through hole connecting the first space and the second space; The vortex generator is fixedly mounted on the partition plate and extends into the second inner hole.

5. The pit filter according to claim 4, characterized in that: The first end of the inner filter cartridge is fixedly mounted on the support frame, and the second end of the inner filter cartridge is fixedly mounted on the partition plate. The first end and the second end are opposite ends of the inner filter cartridge in the axial direction.

6. The pit filter according to claim 2, characterized in that: The box body is provided with a first opening and a second opening at opposite ends thereof, respectively. The first opening and the second opening are both connected to the drainage hole.

7. The pit filter according to claim 6, characterized in that: The box body is also provided with a first flange arranged around the first opening, and a second flange arranged around the second opening.

8. The pit filter according to claim 1, characterized in that: The vortex generator comprises a rotary drive member and a stirring frame installed at the output end of the rotary drive member.

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