Negative pressure blocking protection device for drainage pipeline of nuclear-grade air handling unit
By designing a negative pressure blocking device for casing and protective pipes on the drainage pipeline of the nuclear-level air treatment unit, and using counterweight blocks and plate seals, the water accumulation problem caused by negative pressure in the standby state of the nuclear-level air treatment unit is solved, and the equipment operation reliability is improved.
Patent Information
- Application Number
- CN202422236403.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-11
AI Technical Summary
In the standby state, the nuclear-level air treatment unit has a negative pressure due to the drop in the U-shaped water sealing liquid level, which affects the safe operation of the equipment.
A nuclear-grade air treatment unit drainage pipeline blocking negative pressure protection device is designed, including casing and protective pipe, and the lower end of the protective pipe is sealed under the action of negative pressure by using counterweight blocks and plates to block negative pressure and restore the U-shaped water seal.
It effectively solves the problem of long-term water accumulation in nuclear-grade air treatment units, improves the reliability of equipment operation, and does not require modification of on-site equipment, making it easy to access.
Smart Images
Figure CN223076774U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nuclear power, in particular to a negative pressure protection device for blocking the drainage pipeline of a nuclear-grade air handling unit. Background Art
[0002] The nuclear-grade air handling units 100 are generally arranged in two columns, and the two columns of units are started and operated alternately, with a time interval of about 1 month.
[0003] As Figure 1 , the nuclear-grade air handling unit 100 includes a box body 101, and a fan 102, an electric heater 103, a cooler 104, and a filter 105 arranged in the box body 101. A water sump 106 is provided below the cooler 104, and the water sump 106 is connected to a floor drain through a drainage pipeline 107, and a U-shaped water seal section is provided in a section of the drainage pipeline 107.
[0004] During the operation of the nuclear-grade air handling unit 100, a large amount of condensed water is generated at the cooler 104 in the box body 101, and a drainage pipeline 107 with a U-shaped water seal is led out from the water sump 106 to the floor drain of the room. For the standby nuclear-grade air handling unit 100, no chilled water flows through the cooler 104, and no condensed water is generated on the surface of the cooler 104. If the weather is hot and dry, the liquid level of the U-shaped water seal in the drainage pipeline 107 drops rapidly. At this time, the water seal is damaged, and the drainage pipeline 107 forms a negative pressure to suck air into the box body 101. When the standby nuclear-grade air handling unit 100 is started again, due to the negative pressure situation, the water sump 106 below the cooler 104 cannot drain water, causing the water sump 106 to overflow and start to flood the box body 101, threatening the safe operation of the fan 102 of the nuclear-grade air handling unit 100. Summary of the Utility Model
[0005] The technical problem to be solved by the utility model is to provide a negative pressure protection device for blocking the drainage pipeline of a nuclear-grade air handling unit.
[0006] The technical solution adopted by the utility model to solve its technical problem is: to construct a negative pressure protection device for blocking the drainage pipeline of a nuclear-grade air handling unit, including a sleeve and a protection pipe;
[0007] A baffle is provided at the lower end of the sleeve, a through hole is provided in the middle of the baffle, the sleeve is sleeved on the end of the drainage pipeline of the nuclear-grade air handling unit, and the upper end of the sleeve is hermetically arranged with the outer circumference of the drainage pipeline of the nuclear-grade air handling unit;
[0008] The protective pipe is inserted through the through hole, and the upper end of the protective pipe is located inside the cavity of the drainage pipeline of the nuclear-grade air handling unit, and the lower end of the protective pipe is located outside the drainage pipeline of the nuclear-grade air handling unit. One side of the lower end of the protective pipe is provided with a mounting seat, and a plate body rotatably mounted on the mounting seat for sealing the lower end of the protective pipe, and a counterweight is provided at one end of the plate body.
[0009] In some embodiments, the nuclear-grade air handling unit drainage pipeline blocking negative pressure protection device further includes a pipe clamp installed at the upper end of the sleeve for sealing the outer periphery of the upper end of the sleeve and the drainage pipeline of the nuclear-grade air handling unit.
[0010] In some embodiments, the sleeve is a flexible pipe.
[0011] In some embodiments, the lower end of the protective pipe is inclined, and the lower end of the protective pipe has a first position and a second position, and the first position is above the second position in terms of horizontal height, and the mounting seat is arranged at the first position.
[0012] In some embodiments, the outer diameter of the protective pipe is 40 mm.
[0013] In some embodiments, the protective pipe is a metal pipe.
[0014] In some embodiments, the protective pipe is a plastic pipe.
[0015] In some embodiments, the counterweight is a spherical structure.
[0016] In some embodiments, the mass of the counterweight is 3 grams.
[0017] In some embodiments, the plate body and the counterweight are an integral structure.
[0018] Implementing the present utility model has the following beneficial effects: Applying the nuclear-grade air handling unit drainage pipeline blocking negative pressure protection device is beneficial to the establishment of the U-shaped water seal of the nuclear-grade air handling unit drainage pipeline, solves the problem of long-term water accumulation in the nuclear-grade air handling unit box body, and does not require modification of on-site equipment, is convenient to use, has high applicability, and can effectively improve the operation reliability of nuclear safety-related equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the present utility model, the present utility model will be further described below in conjunction with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings. In the drawings:
[0020] Figure 1 is a schematic structural view of a nuclear-grade air handling unit in the related art;
[0021] Figure 2 is a schematic structural view of a nuclear-grade air handling unit equipped with a drainage pipeline blocking negative pressure protection device in some embodiments of the present invention;
[0022] Figure 3 is Figure 2 a detail view of;
[0023] Figure 4 is a schematic structural view of a drainage pipeline blocking negative pressure protection device of a nuclear-grade air handling unit in some embodiments of the present invention from one perspective;
[0024] Figure 5 is a schematic structural view of a drainage pipeline blocking negative pressure protection device of a nuclear-grade air handling unit in some embodiments of the present invention from another perspective. Detailed Embodiments
[0025] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings and are specific orientations for construction and operation, and are only for the convenience of describing the technical solution, rather than indicating that the device or element referred to must have a specific orientation, and thus should not be construed as a limitation to the present invention.
[0026] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "connection", "linkage", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. When a component is referred to as being "on" or "under" another component, the component can be "directly" or "indirectly" located above the other component, or there may also be one or more intermediate components. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. can explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present utility model. However, those skilled in the art should clearly understand that the present utility model can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present utility model.
[0028] Please refer to Figure 2 , the present utility model shows a nuclear-grade air handling unit 100, which includes a box body 101, and components such as a fan 102, an electric heater 103, a cooler 104, a filter 105, etc. arranged in the box body 101. A water accumulation tray 106 is provided below the cooler 104. The water accumulation tray 106 is connected to a floor drain through a nuclear-grade air handling unit drainage pipeline 107. The nuclear-grade air handling unit drainage pipeline 107 has a U-shaped water seal section, and a nuclear-grade air handling unit drainage pipeline blocking negative pressure protection device 10 is provided at the end (lower end) of the nuclear-grade air handling unit drainage pipeline 107. The nuclear-grade air handling unit drainage pipeline 107 can also be defined as "drainage pipeline 107".
[0029] As Figures 2 to 5 shown, in some embodiments, the nuclear-grade air handling unit drainage pipeline blocking negative pressure protection device 10 includes a sleeve 11 and a protection pipe 12.
[0030] The lower end of the sleeve 11 is provided with a baffle 13, and a through hole is provided in the middle of the baffle 13. The sleeve 11 is sleeved on the end of the nuclear-grade air handling unit drainage pipeline 107, and the upper end of the sleeve 11 is hermetically arranged with the outer periphery of the nuclear-grade air handling unit drainage pipeline 107, which can prevent water leakage and air leakage. The end of the nuclear-grade air handling unit drainage pipeline 107 refers to the end of the nuclear-grade air handling unit drainage pipeline 107 far from the water sump 106.
[0031] The protective pipe 12 is inserted through the through hole, and the upper end of the protective pipe 12 is located in the inner cavity of the nuclear-grade air handling unit drainage pipeline 107, and the lower end of the protective pipe 12 is located outside the nuclear-grade air handling unit drainage pipeline 107. The protective pipe 12 can be relatively fixed to the baffle 13, for example, it can be fixed by glue or welding.
[0032] One side of the lower end of the protective pipe 12 is provided with a mounting seat 14, and a plate body 15 rotatably mounted on the mounting seat 14 for sealing the lower end of the protective pipe 12, and a counterweight 16 is provided at one end of the plate body 15. In some embodiments, the counterweight 16 can also be defined as a heavy hammer.
[0033] Among them, when the nuclear-grade air handling unit 100 operates, the condensed water generated by the cooler 104 opens the plate body 15 through the nuclear-grade air handling unit drainage pipeline 107 for drainage. When the U-shaped water seal of the nuclear-grade air handling unit drainage pipeline 107 is insufficient to form a negative pressure, the plate body 15 can be closed upward under the action of the counterweight 16 and the negative pressure to block the negative pressure, and the condensed water on the water sump 106 can flow back to the U-shaped water seal again to form a water seal again.
[0034] Applying the nuclear-grade air handling unit drainage pipeline negative pressure blocking protection device 10 is beneficial to the establishment of the U-shaped water seal of the nuclear-grade air handling unit drainage pipeline 107, solves the problem of long-term water accumulation in the box body 101 of the nuclear-grade air handling unit 100, and does not require modification of on-site equipment, is convenient to use, has high applicability, and can effectively improve the operation reliability of nuclear safety-related equipment.
[0035] In some embodiments, the nuclear-grade air handling unit drainage pipeline negative pressure blocking protection device 10 further includes a pipe clamp 17 installed at the upper end of the sleeve 11 for hermetically sealing the upper end of the sleeve 11 with the outer periphery of the nuclear-grade air handling unit drainage pipeline 107, that is, the sleeve 11 and the nuclear-grade air handling unit drainage pipeline 107 can be relatively fixed by using the pipe clamp 17.
[0036] In some embodiments, the sleeve 11 is a flexible pipe, for example, a plastic hose can be used.
[0037] Such as Figure 3As shown, in some embodiments, the lower end of the protective pipe 12 is inclined. The lower end of the protective pipe 12 has a first position 12a and a second position 12b. The first position 12a is above the second position 12b in terms of horizontal height. The mounting seat 14 is provided at the first position 12a, that is, the mounting seat 14 is installed at a high point position.
[0038] In some embodiments, the outer diameter of the protective pipe 12 is 40 mm, and the inner diameter of the nuclear-grade air handling unit drainage pipeline 107 is approximately 50 mm. Of course, the structural dimensions of the protective pipe 12 can be selected and set according to actual needs, and no specific limitations are made here.
[0039] In some embodiments, the protective pipe 12 is a metal pipe, such as, but not limited to, stainless steel pipe, aluminum alloy pipe, etc.
[0040] In some embodiments, the protective pipe 12 is a plastic pipe. For example, the protective pipe 12 can be made of hard insulating materials, such as phenolic plastic, polyurethane plastic, epoxy plastic, unsaturated polyester plastic, furan plastic, silicone resin, allyl resin, etc. and their modified resins as the matrix.
[0041] In some embodiments, the counterweight 16 is a spherical structure.
[0042] In some embodiments, the mass of the counterweight 16 is 3 grams. Of course, the structure, size, and weight of the counterweight 16 can be selected and set according to actual needs, and no specific limitations are made here.
[0043] In some embodiments, the plate body 15 and the counterweight 16 are an integral structure. Of course, the counterweight 16 can be connected to the plate body 15 through a connecting rod, and the connecting rod and the mounting seat 14 are connected through a rotating structure such as a rotating shaft. The plate body 15 can be a circular plate-like structure, which can seal the lower end of the protective pipe 12.
[0044] It can be understood that the above embodiments only express the preferred embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be construed as a limitation to the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.
Claims
1. A negative pressure protection device for blocking the drainage pipeline of a nuclear-grade air handling unit, characterized in that, It includes a sleeve (11) and a protective pipe (12); A baffle (13) is provided at the lower end of the sleeve (11), a through hole is provided in the middle of the baffle (13), the sleeve (11) is sleeved on the end of the nuclear-grade air handling unit drainage pipeline, and the upper end of the sleeve (11) is hermetically arranged with the outer periphery of the nuclear-grade air handling unit drainage pipeline; The protective pipe (12) passes through the through hole, the upper end of the protective pipe (12) is located in the inner cavity of the nuclear-grade air handling unit drainage pipeline, the lower end of the protective pipe (12) is located outside the nuclear-grade air handling unit drainage pipeline, a mounting seat (14) is provided on one side of the lower end of the protective pipe (12), and a plate body (15) rotatably mounted on the mounting seat (14) for sealing the lower end of the protective pipe (12), and a counterweight (16) is provided at one end of the plate body (15).
2. The negative pressure protection device for blocking the drainage pipeline of the nuclear-grade air handling unit according to claim 1, wherein, The nuclear-grade air handling unit drainage pipeline blocking negative pressure protection device further includes a pipe clamp (17) installed at the upper end of the sleeve (11) for hermetically sealing the upper end of the sleeve (11) with the outer periphery of the nuclear-grade air handling unit drainage pipeline.
3. The negative pressure protection device for blocking the drainage pipeline of the nuclear-grade air handling unit according to claim 1, characterized in that, The sleeve (11) is a flexible pipe.
4. The nuclear-grade air handling unit drain pipeline blocking negative pressure protection device according to claim 1, characterized in that, The lower end of the protective pipe (12) is inclined, the lower end of the protective pipe (12) has a first position (12a) and a second position (12b), the first position (12a) is above the second position (12b) in terms of horizontal height, and the mounting seat (14) is provided at the first position (12a).
5. The negative pressure protection device for blocking the drainage pipeline of the nuclear-grade air handling unit according to claim 1, wherein The outer diameter of the protective pipe (12) is 40 mm.
6. The negative pressure protection device for blocking the drainage pipeline of the nuclear-grade air handling unit according to claim 1, characterized in that The protective pipe (12) is a metal pipe.
7. The negative pressure protection device for blocking the drainage pipeline of the nuclear-grade air handling unit according to claim 1, wherein The protective pipe (12) is a plastic pipe.
8. The negative pressure protection device for blocking the drainage pipeline of the nuclear-grade air handling unit according to claim 1, wherein, The counterweight (16) is a spherical structure.
9. The negative pressure protection device for blocking the drainage pipeline of the nuclear-grade air handling unit according to claim 1, wherein, The mass of the counterweight (16) is 3 grams.
10. The nuclear-grade air handling unit drain pipeline blocking negative pressure protection device according to claim 1, wherein, The plate body (15) and the counterweight (16) are of an integral structure.