Temporary filtering device for pump inlet of nuclear power station

Abstract

The utility model discloses a temporary filtering device for a pump inlet of a nuclear power station, which comprises a box body, a first pipe body and a second pipe body, the box body comprises a top plate, a side wall arranged around the top plate and a detachable bottom plate arranged opposite to the top plate, and the side wall is respectively connected with the first pipe body provided with a first flange and the second pipe body provided with a second flange; the filter screen is detachably mounted in the box body and is used for filtering liquid which flows into the box body from the first pipe body and flows out of the box body from the second pipe body; and the pressure detection device is arranged on the side wall of the box body and is used for monitoring the pressure of the liquid in the box body. Compared with the prior art, the temporary filtering device for the pump inlet of the nuclear power station is convenient to assemble and disassemble by designing the box body with the detachable bottom plate and arranging the filter screen in the box body, impurities in the box body and the filter screen are convenient to clean, when the filter screen needs to be cleaned is known through the pressure detection device, and the impurities can be cleaned in time; the flushing efficiency of a pipeline system is improved, and key nodes of a unit are not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline flushing, and more specifically relates to a temporary filtering device for a nuclear power plant pump inlet. Background Art

[0002] There are many water systems in a pressurized water reactor nuclear power plant, including many pipeline systems. After installation, there are many impurities in the pipelines, and multiple power flushing is required before the system is officially put into operation, especially for carbon steel pipes with a lot of rust residue.

[0003] According to the commissioning experience of nuclear power projects at home and abroad, during the power flushing period, the most widely used method is to use a temporary filter and a short pipe in front of the pump inlet. However, the filter is very easy to clog, and it needs to be repeatedly disassembled and cleaned. Each time the filter is removed and installed, it takes a long time, and the pump inlet pipeline needs to be aligned, which makes the flushing process consume a lot of manpower and time, and will also have different degrees of impact on the key nodes of the unit.

[0004] In view of this, it is indeed necessary to provide a temporary filtering device for the pump inlet of a nuclear power plant that can improve the flushing efficiency and does not affect the key nodes of the unit. Utility Model Content

[0005] The invention aims to overcome the defects of the prior art and provide a temporary filtering device for a nuclear power plant pump inlet, which is convenient for installation and removal when cleaning the filter screen and improves the flushing efficiency.

[0006] In order to achieve the above-mentioned invention object, the utility model provides a temporary filtering device for a nuclear power plant pump inlet, which comprises:

[0007] A box body, comprising a top plate, a side wall arranged around the top plate, and a detachable bottom plate arranged opposite to the top plate, wherein a first tube body provided with a first flange and a second tube body provided with a second flange are respectively connected to the side wall;

[0008] A filter screen is detachably installed in the box body, and is used to filter the liquid flowing into the box body from the first tube body and flowing out of the box body from the second tube body; and

[0009] The pressure detection device is arranged on the side wall of the box body and is used for monitoring the liquid pressure in the box body.

[0010] According to an embodiment of the temporary filtering device for the pump inlet of a nuclear power plant of the utility model, the filter screen is in contact with the side wall, the top plate and the bottom plate.

[0011] According to an embodiment of the temporary filtering device for the pump inlet of a nuclear power plant of the utility model, the side wall is provided with a first chute, and the side edge of the filter screen is located in the first chute.

[0012] According to an embodiment of the temporary filtering device for the pump inlet of a nuclear power plant of the utility model, a second chute is provided on the bottom plate, and the bottom edge of the filter screen is located in the second chute.

[0013] According to an embodiment of the temporary filtering device for the pump inlet of a nuclear power plant of the utility model, a mounting groove is provided on the top plate, and the top edge of the filter screen is located in the mounting groove.

[0014] According to an embodiment of the temporary filtering device for the pump inlet of a nuclear power plant of the utility model, a sealing ring is provided between the bottom plate and the side wall.

[0015] According to an embodiment of the temporary filtering device for the pump inlet of a nuclear power plant of the utility model, the pressure detecting device is a pressure gauge, and the measuring head of the pressure detecting device is lower than the connection between the box body and the first tube body, and also lower than the connection between the box body and the second tube body.

[0016] According to an embodiment of the temporary filtering device for a nuclear power plant pump inlet of the utility model, the first pipe body is connected to the water pump via the first flange, and the second pipe body is connected to the pipeline system to be flushed via the second flange.

[0017] According to an embodiment of the temporary filtering device for the pump inlet of a nuclear power plant of the utility model, the measuring head and the second tube body are arranged on the same side of the filter screen.

[0018] Compared with the prior art, the temporary filtering device for the pump inlet of a nuclear power plant of the utility model is convenient for assembly and disassembly by designing a box body with a detachable bottom plate and arranging the filter screen in the box body, and is convenient for cleaning impurities in the box body and the filter screen; through the pressure detection device, it can be understood when the filter screen needs to be cleaned, and impurities can be cleaned in time, thereby realizing rapid cleaning of the filter screen, improving the flushing efficiency of the pipeline system, reducing the waste of manpower, material resources and time, and not affecting the key nodes of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following is a detailed description of the utility model of the temporary filtering device for the pump inlet of a nuclear power plant and its technical effects in conjunction with the accompanying drawings and specific embodiments, wherein:

[0020] Figure 1 The utility model is a schematic diagram of the structure of a temporary filtering device for a nuclear power plant pump inlet.

[0021] Numbers in the figure: 11 - side wall, 12 - top plate, 13 - bottom plate, 20 - filter screen, 31 - first tube body, 32 - first flange, 41 - second tube body, 42 - second flange, 50 - measuring head. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and beneficial technical effect of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining the utility model, and are not intended to limit the utility model.

[0023] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0024] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0025] See also Figure 1 As shown, the utility model provides a temporary filtering device for a nuclear power plant pump inlet, which comprises:

[0026] The box body includes a top plate 12, a side wall 11 arranged around the top plate 12, and a detachable bottom plate 13 arranged opposite to the top plate 12, wherein the side wall 11 is respectively connected with a first tube body 31 provided with a first flange 32 and a second tube body 41 provided with a second flange 42;

[0027] The filter screen 20 is removably installed in the box body, and is used to filter the liquid that flows into the box body from the first tube body 31 and flows out of the box body from the second tube body 41; and

[0028] The pressure detection device is arranged on the side wall 11 of the box body and is used to monitor the liquid pressure in the box body.

[0029] exist Figure 1 In the illustrated embodiment, the filter screen 20 is in contact with the side wall 11 , the top plate 12 , and the bottom plate 13 . The filter screen 20 is located between the first tube body 31 and the second tube body 41 , and the mesh surface of the filter screen 20 faces the first tube body 31 and the second tube body 41 .

[0030] According to one embodiment of the utility model, the side wall 11 is provided with a first slide groove (not shown), the side edge of the filter 20 is located in the first slide groove, the filter 20 can slide along the slide groove, the bottom plate 13 is opened, the filter 20 can slide down from the slide groove and out of the box body, and after the filter 20 is cleaned, it is installed in the box body through the slide groove; the top plate 12 is provided with a mounting groove (not shown), the top edge of the filter 20 is located in the mounting groove; the bottom plate 13 is provided with a second slide groove (not shown), the bottom edge of the filter 20 is located in the second slide groove, after the bottom plate 13 and the filter 20 are separated from the box body side wall 11, the filter 20 can be moved along the second slide groove to achieve the assembly and disassembly between the bottom plate 13 and the filter 20. In addition, in order to improve the sealing performance, a sealing ring (not shown) is provided between the bottom plate 13 and the side wall 12, and the box body is sealed by the sealing ring, and the specific connection method is not limited.

[0031] exist Figure 1 In the embodiment shown, the pressure detection device is a pressure gauge, and the measuring head 50 of the pressure detection device is lower than the connection between the box and the first tube 31, and also lower than the connection between the box and the second tube 41. According to an embodiment of the temporary filtering device for the pump inlet of a nuclear power plant of the present invention, the measuring head 50 and the second tube 41 are arranged on the same side of the filter screen 20.

[0032] exist Figure 1 In the illustrated embodiment, the first pipe body 31 is connected to the water pump via the first flange 32 , and the second pipe body 41 is connected to the pipeline system to be flushed via the second flange 42 .

[0033] During actual use, the water pump is turned on and runs normally. Initially, the pressure detection device displays normal. When the filter 20 is blocked to a certain extent, the indication of the pressure detection device becomes abnormal. When the preset threshold is reached, the pump is stopped, the base plate 13 and the filter 20 are removed, and the impurities are cleaned. Then, the cleaned or new filter 20 is installed on the base plate 13, and the pipeline cleaning work is continued.

[0034] In combination with the above detailed description of the specific implementation methods of the utility model, it can be seen that, compared with the prior art, the temporary filtering device for the pump inlet of a nuclear power plant of the utility model is convenient for assembly and disassembly by designing a box body with a detachable bottom plate 13 and arranging the filter screen 20 in the box body, and is convenient for cleaning impurities in the box body and the filter screen 20; the pressure detection device can be used to understand when the filter screen 20 needs to be cleaned, and impurities can be cleaned in time, thereby realizing rapid cleaning of the filter screen 20, improving the flushing efficiency of the pipeline system, reducing the waste of manpower, material resources and time, and not affecting the key nodes of the unit.

[0035] The utility model nuclear power plant pump inlet temporary filter device has a simple structure, low cost, and is easy to improve and implement in the units under construction. By adopting the utility model nuclear power plant pump inlet temporary filter device, not only can the nuclear power plant commissioning period be shortened, but also the nuclear power plant construction cost can be saved, so as to reduce costs and increase efficiency, which is of great significance to improving the construction efficiency of nuclear power plant units. The utility model nuclear power plant pump inlet temporary filter device is also suitable for fields such as petrochemical industry.

[0036] According to the above principles, the present invention can also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A temporary filtration device for a nuclear power plant pump inlet, characterized in that: include: A box body, comprising a top plate, a side wall arranged around the top plate, and a detachable bottom plate arranged opposite to the top plate, wherein a first tube body provided with a first flange and a second tube body provided with a second flange are respectively connected to the side wall; A filter screen is removably installed in the box body, and is used to filter the liquid that flows into the box body from the first tube body and flows out of the box body from the second tube body; as well as The pressure detection device is arranged on the side wall of the box body and is used for monitoring the liquid pressure in the box body.

2. The temporary filtering device for the nuclear power plant pump inlet according to claim 1, characterized in that: The filter screen is in contact with the side wall, the top plate and the bottom plate.

3. The temporary filtering device for the nuclear power plant pump inlet according to claim 1, characterized in that: The side wall is provided with a first slide groove, and the side edge of the filter screen is located in the first slide groove.

4. The temporary filtering device for the nuclear power plant pump inlet according to claim 1, characterized in that: A second chute is provided on the bottom plate, and the bottom edge of the filter is located in the second chute.

5. The temporary filtering device for the nuclear power plant pump inlet according to claim 1, characterized in that: The top plate is provided with a mounting groove, and the top edge of the filter screen is located in the mounting groove.

6. The temporary filtering device for the nuclear power plant pump inlet according to claim 1, characterized in that: A sealing ring is provided between the bottom plate and the side wall.

7. The temporary filtering device for the nuclear power plant pump inlet according to claim 1, characterized in that: The pressure detection device is a pressure gauge, and the measuring head of the pressure detection device is lower than the connection between the box body and the first tube body, and also lower than the connection between the box body and the second tube body.

8. The temporary filtering device for the nuclear power plant pump inlet according to claim 1, characterized in that: The first pipe body is connected to a water pump via the first flange, and the second pipe body is connected to a pipeline system to be flushed via the second flange.

9. The temporary filtering device for the nuclear power plant pump inlet according to claim 1, characterized in that: The pressure detection device is provided with a measuring head, and the measuring head and the second tube body are arranged on the same side of the filter screen.

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