Pit filter mounting rack

Abstract

The utility model relates to a pit filter mounting rack, and belongs to the technical field of pit filters. Comprising a bottom plate, a confluence shell fixedly connected to the bottom plate and a plurality of filter cartridges with one ends fixedly connected to the confluence shell, the bottom plate is fixedly installed on the bottom face of a pit through anchor bolts, and a vertically-arranged supporting frame is fixedly installed on the side, opposite to the confluence shell, of the top face of the bottom plate; and the other end of the filter cartridge is fixedly connected to the support frame. According to the pit filter, the problem of low structural strength of the pit filter in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to a pit filter mounting frame and belongs to the technical field of pit filters. Background Art

[0002] The pit 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 a loss of coolant accident (LOCA) or a main steam line rupture accident (MSLB) occurs in a pressurized water reactor nuclear power plant, the coolant enters the containment pit through the rupture. The coolant will be filtered through the containment pit filter and then enter the safety injection system (RIS) and the containment spray system (EAS) through a pump device 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. Its working condition under the recirculation condition directly affects the normal operation of the safety injection system and the containment 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 fragments must be filtered through the pit filter to ensure that the safety injection system and the containment spray system perform their safety functions.

[0004] At present, the power plants in operation in China basically use the original design of pit filters, which are composed of large debris racks (EAS004FD) and four filters (EAS005 / 006FI and RIS005 / 006FI). The four filters are located at the water inlets of EAS and RIS pumps, respectively, and are contained by EAS004FI in a cubic structure. The filtration area is only the side area of ​​the cube, which is very limited.

[0005] After searching, a Chinese patent with announcement number CN114177687B discloses a backwashing device and a pit filter, the technical highlights of which are: including a fluid delivery pipeline and a spray assembly; the fluid delivery pipeline is used to connect to an external cleaning medium; the spray assembly is connected to the fluid delivery pipeline and is used to spray the cleaning medium into the pit filter.

[0006] As shown in the above scheme, the cartridge filter in most of the current new pit filters has one end of the cartridge directly connected to the bracket, resulting in low structural strength and the cartridge is easily deformed or even damaged under the action of external forces.

[0007] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide a pit filter mounting frame, which solves the problem of low structural strength of the pit filter in the prior art.

[0009] The technical problem to be solved by the utility model is achieved by adopting the following technical solutions:

[0010] A pit filter mounting frame comprises a base plate, a confluence shell fixedly connected to the base plate, and a plurality of filter cartridges fixedly connected to the confluence shell at one end. The base plate is fixedly mounted to the bottom surface of the pit by anchor bolts, a vertically arranged support frame is fixedly mounted on the top surface of the base plate on the side opposite to the confluence shell, and the other end of the filter cartridge is fixedly connected to the support frame.

[0011] The utility model is further configured as follows: the support frame includes a plurality of columns fixedly connected to the base plate in a vertical direction, the plurality of columns are evenly distributed along the width direction of the base plate, a plurality of horizontally arranged cross bars are fixedly connected between two adjacent columns, the plurality of cross bars are evenly distributed along the length direction of the columns, and the filter cartridges are fixedly connected to the cross bars.

[0012] The utility model is further configured as follows: a fixing rod is fixedly connected between the top end of the column and the confluence housing.

[0013] The utility model is further configured as follows: a flange ring is provided at one end of the filter cartridge, and the flange ring is connected to the confluence housing through a bolt pair.

[0014] The utility model is further configured as follows: a mounting plate is fixedly connected to the other end of the filter cartridge, and the mounting plate is connected to the cross bar through a bolt pair.

[0015] The utility model is further configured as follows: a plurality of reinforcing rods arranged in a matrix are fixedly connected inside the confluence housing, the reinforcing rods are arranged horizontally and two ends thereof are respectively fixedly connected to the two side surfaces of the confluence housing.

[0016] The utility model is further configured as follows: two ribs are fixedly connected to the bottom plate, the ribs are perpendicular to the bottom plate, and the confluence housing is fixedly connected between the two ribs.

[0017] The utility model is further configured as follows: a weight-reducing groove is provided on the bottom plate.

[0018] The beneficial effects of the utility model are:

[0019] 1. By arranging a support frame on the bottom plate and cooperating with the confluence housing, the two ends of the filter cartridge are supported, so that the filter cartridge is more stable and the overall structural strength of the equipment is higher;

[0020] 2. Through the coordination of several columns and cross bars, the overall structure of the support frame is simple, the layout is reasonable, and the overall strength is higher;

[0021] 3. The two ends of the filter cartridge are detachably mounted on the confluence housing and the support frame through flange rings and mounting plates, so as to facilitate the disassembly and maintenance of the filter cartridge;

[0022] 4. By adding a number of reinforcing rods inside the confluence shell to support the inside of the confluence shell, the deformation of the confluence shell under external force is reduced;

[0023] 5. By setting ribs on the bottom plate, the confluence shell and the bottom plate are further strengthened to improve the bending strength of the confluence shell and the deformation resistance of the bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0025] Figure 2 It is a structural schematic diagram of the bottom plate and the confluence shell part in the utility model.

[0026] In the figure: 1, bottom plate; 2, confluence shell; 3, filter cartridge; 4, weight reduction groove; 5, rib plate; 6, reinforcement rod; 7, support frame; 8, column; 9, fixing rod; 10, cross bar; 11, flange ring; 12, mounting plate. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific illustrations.

[0028] like Figure 1 and Figure 2 As shown, a pit filter mounting frame includes a bottom plate 1, a confluence housing 2 fixedly connected to the bottom plate 1, and a plurality of filter cartridges 3 fixedly connected to the confluence housing 2 at one end, wherein the bottom plate 1 is fixedly installed on the bottom surface of the pit by anchor bolts, and a weight reduction groove 4 is provided on the bottom plate 1. The confluence housing 2 is a plate-shaped housing. To enhance the strength of the confluence housing 2, two ribs 5 are fixedly connected to the bottom plate 1. The ribs 5 are perpendicular to the bottom plate 1. The confluence housing 2 is fixedly connected between the two ribs 5. By arranging the ribs 5 on the bottom plate 1, the confluence housing 2 and the bottom plate 1 are further strengthened, thereby improving the bending strength of the confluence housing 2 and the deformation resistance of the bottom plate 1.

[0029] A plurality of reinforcing rods 6 arranged in a matrix are fixedly connected inside the confluence shell 2. The reinforcing rods 6 are horizontally arranged and both ends are respectively fixedly connected to the two side surfaces of the confluence shell 2. By adding a plurality of reinforcing rods 6 inside the confluence shell 2, the interior of the confluence shell 2 is supported, thereby reducing the deformation of the confluence shell 2 under external force.

[0030] A vertically arranged support frame 7 is fixedly installed on the top surface of the bottom plate 1 on one side opposite to the confluence housing 2, and the other end of the filter cartridge 3 is fixedly connected to the support frame 7. The support frame 7 includes a plurality of columns 8 fixedly connected to the bottom plate 1 in the vertical direction, and a fixing rod 9 is fixedly connected between the top of the column 8 and the confluence housing 2. The plurality of columns 8 are evenly distributed along the width direction of the bottom plate 1, and a plurality of horizontally arranged cross bars 10 are fixedly connected between two adjacent columns 8, and the plurality of cross bars 10 are evenly distributed along the length direction of the columns 8, and the filter cartridges 3 are fixedly connected to the cross bars 10.

[0031] In order to facilitate the disassembly and maintenance of the filter cartridge 3, a flange ring 11 is provided at one end of the filter cartridge 3, and the flange ring 11 is connected to the confluence housing 2 through a bolt pair. A mounting plate 12 is fixedly connected to the other end of the filter cartridge 3, and the mounting plate 12 is connected to the cross bar 10 through a bolt pair. The two ends of the filter cartridge 3 are detachably mounted on the confluence housing 2 and the support frame 7 through the flange ring 11 and the mounting plate 12, respectively, so as to facilitate the disassembly and maintenance of the filter cartridge 3.

[0032] The implementation principle of the utility model is:

[0033] By arranging a support frame 7 on the bottom plate 1 and cooperating with the support frame 7 and the confluence housing 2, both ends of the filter cartridge 3 are supported, so that the filter cartridge 3 is more stable and the overall structural strength of the equipment is higher.

[0034] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of protection claimed by the utility model. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A pit filter mounting frame, characterized in that: The invention comprises a bottom plate (1), a flow collecting shell (2) fixedly connected to the bottom plate (1), and a plurality of filter cartridges (3) one end of which is fixedly connected to the flow collecting shell (2); the bottom plate (1) is fixedly mounted on the bottom surface of a pit by means of anchor bolts; a vertically arranged support frame (7) is fixedly mounted on the top surface of the bottom plate (1) on a side opposite to the flow collecting shell (2); and the other end of the filter cartridge (3) is fixedly connected to the support frame (7).

2. A pit filter mounting frame according to claim 1, characterized in that: The support frame (7) comprises a plurality of columns (8) fixedly connected to the base plate (1) in a vertical direction, the plurality of columns (8) being evenly distributed along the width direction of the base plate (1), a plurality of horizontally arranged cross bars (10) being fixedly connected between two adjacent columns (8), the plurality of cross bars (10) being evenly distributed along the length direction of the columns (8), and the filter cartridges (3) being fixedly connected to the cross bars (10).

3. A pit filter mounting frame according to claim 2, characterized in that: A fixing rod (9) is fixedly connected between the top of the column (8) and the confluence housing (2).

4. A pit filter mounting frame according to claim 2, characterized in that: A flange ring (11) is provided at one end of the filter cartridge (3), and the flange ring (11) is connected to the confluence housing (2) via a bolt pair.

5. A pit filter mounting frame according to claim 4, characterized in that: The other end of the filter cartridge (3) is fixedly connected to a mounting plate (12), and the mounting plate (12) is connected to the cross bar (10) via a bolt pair.

6. A pit filter mounting frame according to claim 1, characterized in that: A plurality of reinforcing rods (6) arranged in a matrix are fixedly connected inside the confluence housing (2); the reinforcing rods (6) are arranged horizontally and have two ends respectively fixedly connected to two side surfaces of the confluence housing (2).

7. A pit filter mounting frame according to claim 1, characterized in that: Two ribs (5) are fixedly connected to the bottom plate (1), the ribs (5) are perpendicular to the bottom plate (1), and the confluence housing (2) is fixedly connected between the two ribs (5).

8. The pit filter mounting frame according to claim 1, characterized in that: The bottom plate (1) is provided with a weight-reducing groove (4).

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