Hazardous chemical stirring device for nuclear power plant
By designing a variety of sealing components in the hazardous chemical mixing device of a nuclear power plant, the problem of poor sealing performance of the mixing equipment was solved, the leakage of volatile gases and lubricating oil was prevented, and the safety of equipment and personnel was improved.
Patent Information
- Application Number
- CN202422974573.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-02
AI Technical Summary
The original inclined stirring equipment in the nuclear power plant had poor stirring effect and poor sealing performance, which led to the volatilization of volatile alkaline gases and leakage of lubricating oil, endangering the health of personnel and equipment safety.
A hazardous chemical stirring device for a nuclear power plant is designed. The device adopts a structure including a positioning frame, a base plate, a stirring shaft and multiple sealing components. A first skeleton oil seal structure, a water seal component, a filler or a combination of multiple skeleton oil seal structures are used to form multiple sealing protection to prevent the escape of volatile gas and leakage of lubricating oil.
It effectively prevents volatile gases from escaping out of the mixing tank and lubricating oil from leaking into the mixing tank, improving safety and reducing the risk of personal injury and equipment failure.
Smart Images
Figure CN223439606U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of hazardous chemical treatment in nuclear power plants, in particular to a hazardous chemical stirring device in nuclear power plants. Background Art
[0002] The existing tilting mixing equipment in nuclear power plants suffers from poor mixing performance and sealing performance. Volatile alkaline gases (such as ammonia) often escape through gaps in the equipment and into the workplace, causing lung and eye discomfort if inhaled. Furthermore, the lubricating oil in the mixing equipment can leak into the mixing tank due to poor sealing performance, causing adverse effects. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a hazardous chemical stirring device for a nuclear power plant.
[0004] The technical solution adopted by the utility model to solve the technical problem is as follows: constructing a nuclear power plant hazardous chemical stirring device, which includes a positioning frame, a bottom plate fixedly connected to the bottom of the positioning frame, a stirring shaft passing through the bottom plate, and a sealing assembly, wherein the bottom plate is provided with a through hole for the stirring shaft to pass through;
[0005] The sealing assembly includes a first skeleton oil seal structure and a water seal assembly, wherein the first skeleton oil seal structure is installed in the through hole and is arranged in contact with the stirring shaft, and the water seal assembly includes a water seal positioning plate installed on the bottom plate, a water seal partition plate installed on the bottom plate, a water seal connector fixedly connected to the stirring shaft, and an active liquid, wherein an accommodating space for accommodating the active liquid is formed between the water seal positioning plate and the inner wall of the positioning frame, a portion of the water seal connector extends into the active liquid, and the water seal partition plate is used to separate the accommodating space;
[0006] Alternatively, the sealing assembly includes a plurality of packing members, a packing fixing block, and a packing positioning member, wherein the packing fixing block is mounted on the bottom plate and connected to the packing positioning member via a fastener, the packing positioning member is sleeved on the outside of the stirring shaft, and an installation space is formed between the outer wall of the packing fixing block, the lower wall of the packing positioning member, the circumferential surface of the stirring shaft, and the upper portion of the bottom plate, and the plurality of packing members are installed in the installation space;
[0007] Or the sealing assembly comprises a plurality of second skeleton oil seal structures, a third skeleton oil seal structure, a sealing cover plate, a sealing connecting piece and a sealing limiting piece, the plurality of second skeleton oil seal structures are installed in the through hole and are arranged in adhesion with the stirring shaft, the sealing cover plate is installed on the bottom plate and covers the upper part of the second skeleton oil seal structure, the sealing limiting piece is installed above the sealing cover plate and is sleeved outside the stirring shaft, and the sealing connecting piece is fixedly connected to the positioning rack, and the third skeleton oil seal structure is installed between the outer wall of the sealing limiting piece and the outer wall of the sealing connecting piece.
[0008] In some embodiments, the nuclear power plant hazardous chemical mixing device further comprises a motor reducer and a shaft coupling, the motor reducer is installed on the positioning rack, and the output end of the motor reducer is connected with the stirring shaft through the shaft coupling.
[0009] In some embodiments, the nuclear power plant hazardous chemical mixing device further comprises a stirrer connected to the end of the stirring shaft away from the motor reducer.
[0010] In some embodiments, a gas sensor is installed in the positioning rack.
[0011] In some embodiments, the positioning rack and the bottom plate are welded.
[0012] In some embodiments, the positioning rack and the bottom plate are connected through bolts.
[0013] In some embodiments, the thickness of the bottom plate is 12-18mm.
[0014] In some embodiments, the positioning rack and the bottom plate are made of stainless steel.
[0015] In some embodiments, the diameter of the stirring shaft is 30-35mm.
[0016] In some embodiments, a bearing is installed between the sealing limiting piece and the sealing connecting piece.
[0017] The nuclear power plant hazardous chemical mixing device has the following advantages: the device is easy to install, the sealing assembly can effectively prevent lubricating oil from leaking into the stirring tank and prevent volatile gas from escaping outside the stirring tank, is safe and effective, and reduces the risk of personnel being injured by volatile gas or equipment failure caused by the deposition of volatile corrosive gas. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the utility model, the utility model will be further described below in conjunction with the drawings and embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.
[0019] Fig. 1 It is the structural schematic diagram of the first embodiment of the nuclear power plant dangerous chemical mixing device in some embodiments of the utility model;
[0020] Fig. 2 It is the structural schematic diagram of the second embodiment of the nuclear power plant dangerous chemical mixing device in some embodiments of the utility model;
[0021] Fig. 3 It is the structural schematic diagram of the third embodiment of the nuclear power plant dangerous chemical mixing device in some embodiments of the utility model. Specific implementation
[0022] In order to have more clear understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model will be described in detail by comparing the drawings. In the following description, it should be understood that the orientation or position relationship of "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is constructed and operated in a particular orientation, and is only for the convenience of describing the technical scheme, and should not be understood as indicating that the device or element must have a particular orientation, and therefore should not be understood as a limitation on the utility model.
[0023] It should be noted that, unless otherwise explicitly specified and limited, the terms such as "mounting", "connection", "connecting", "fixing", "setting" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on another element, or one or more intervening elements can exist. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0024] Please refer to Figs. 1 to 3 It is a nuclear power plant dangerous chemical mixing device in some embodiments of the present application, which comprises a positioning rack 1, a bottom plate 2 fixedly connected below the positioning rack 1, a stirring shaft 3 and a sealing assembly 4 penetrating the bottom plate 2, and the bottom plate 2 is provided with a through hole for the stirring shaft 3 to penetrate. Among them, the nuclear power plant dangerous chemical mixing device is particularly applied to the stirring operation of acid, alkali and other solvents or radioactive liquid. In the stirring process, acid, alkali and other solvents or radioactive liquid may have volatile gas escaping, or lubricating oil in the nuclear power plant dangerous chemical mixing device may leak into the stirring tank, so the sealing assembly 4 is set to effectively prevent the lubricating oil from leaking into the stirring tank, and at the same time, prevent the volatile gas from escaping outside the stirring tank.
[0025] In addition, the positioning rack 1 and the bottom plate 2 are welded or connected by bolts, and the connection mode can be adjusted according to the actual situation. The structure or size of the positioning rack 1 and the bottom plate 2 can be adaptively adjusted according to the different structure of the sealing assembly 4.
[0026] In this embodiment, the sealing assembly 4 can be divided into three structure forms, such as Fig. 1As shown, the first structural form of the sealing assembly 4 is as follows: the sealing assembly 4 includes a first skeleton oil seal structure 401 and a water seal assembly. The first skeleton oil seal structure 401 is installed in the through hole and is arranged in contact with the stirring shaft 3. The water seal assembly includes a water seal positioning plate 403 installed on the bottom plate 2, a water seal partition plate 404 installed on the bottom plate 2, a water seal connector 405 fixedly connected to the stirring shaft 3, and an active liquid 406. The water seal positioning plate 403 and the inner wall of the positioning frame 1 form an accommodating space 407 for accommodating the active liquid 406. A portion of the water seal connector 405 extends into the active liquid 406, and the water seal partition plate 404 is used to separate the accommodating space 407. More specifically, the water seal positioning plate 403 and the water seal partition plate 404 are arranged parallel to each other, and the portion of the water seal connector 405 that extends into the active liquid 406 is arranged parallel to the water seal positioning plate 403.
[0027] As can be understood, the first skeleton oil seal structure 401 can isolate the transmission components requiring lubrication from the external environment, preventing lubricating oil leakage and also preliminarily preventing volatile gases from escaping from the first skeleton oil seal structure 401. Furthermore, the active liquid 406 can be water or a liquid capable of absorbing volatile gases to prevent them from escaping from the positioning frame 1. The water seal connector 405 partially extends into the active liquid 406, blocking the direction of volatile gases from escaping, forcing them to flow only toward the active liquid 406. The provision of the water seal partition plate 404 also forces volatile gases to escape through more different accommodating spaces 407 of active liquid 406, making it more difficult for them to escape.
[0028] like Fig. 2 As shown, the second structural form of the sealing assembly 4 is as follows: the sealing assembly 4 includes a plurality of packing members 408, a packing fixing block 409, and a packing positioning member 410. The packing fixing block 409 is mounted on the base plate 2 and connected to the packing positioning member 410 via fasteners. The packing positioning member 410 is sleeved on the outside of the stirring shaft 3. An installation space is formed between the outer wall of the packing fixing block 409, the lower wall of the packing positioning member 410, the circumferential surface of the stirring shaft 3, and the upper portion of the base plate 2. The plurality of packing members 408 are installed in the installation space, and the plurality of packing members 408 are arranged along the axial direction of the stirring shaft 3. The material of the packing members 408 can be asbestos fabric, carbon fiber, or rubber. Through the positioning of the packing fixing block 409 and the packing positioning member 410, the plurality of packing members 408 are positioned and filled in the installation space to prevent the escape of volatile gas or the leakage of lubricating oil into the stirring tank.
[0029] like Fig. 3As shown, the third structure of the sealing assembly 4 is that the sealing assembly 4 comprises a plurality of second skeleton oil seal structures 411, a third skeleton oil seal structure 412, a sealing cover plate 413, a sealing connecting piece 414 and a sealing limiting piece 415, the plurality of second skeleton oil seal structures 411 are installed in the through hole and are arranged in close contact with the stirring shaft 3, the sealing cover plate 413 is installed on the bottom plate 2 and covers the upper part of the second skeleton oil seal structure 411, the sealing limiting piece 415 is installed above the sealing cover plate 413 and is sleeved outside the stirring shaft 3, the sealing connecting piece 414 is fixedly connected to the positioning rack 1, and the third skeleton oil seal structure 412 is installed between the outer wall of the sealing limiting piece 415 and the outer wall of the sealing connecting piece 414. The number of the second skeleton oil seal structure 411 is preferably two, a plurality of skeleton oil seal structures are arranged, the sealing connecting piece 414 is also sealingly connected between the positioning rack 1, the sealing cover plate 413 is additionally provided, multiple protections are formed to prevent volatile gas from overflowing or lubricating oil from leaking into the stirring tank. And the bearing 416 is installed between the sealing limiting piece 415 and the sealing connecting piece 414, which can realize centering and lubrication.
[0030] Further, the nuclear power plant hazardous chemical mixing device further comprises a motor reducer 5 and a shaft coupling 6, the motor reducer 5 is installed on the positioning rack 1, and the output end of the motor reducer 5 is connected with the stirring shaft 3 through the shaft coupling 6. The nuclear power plant hazardous chemical mixing device further comprises a stirrer (not shown), which is connected to one end of the stirring shaft 3 away from the motor reducer 5. The stirrer is specifically composed of a plurality of stirring blades, the motor reducer 5 can drive the stirrer to stir, and the motor reducer 5 can realize speed regulation of the stirrer.
[0031] The positioning rack 1 also has a gas sensor installed therein to sense the concentration of volatile gas. The positioning rack 1 and the bottom plate 2 are made of stainless steel, so that the positioning rack 1 and the bottom plate 2 have sufficient strength and corrosion resistance.
[0032] The thickness of the bottom plate 2 is 12mm to 18mm, and the thickness of the bottom plate 2 is preferably 15mm. The diameter of the stirring shaft 3 is 30mm to 35mm, and the diameter of the stirring shaft 3 is preferably 32mm, so that the stirring shaft 3 has sufficient strength to stir.
[0033] In summary, the nuclear power plant hazardous chemical mixing device is convenient to install, the sealing assembly 4 can effectively prevent lubricating oil from leaking into the stirring tank, and at the same time can prevent volatile gas from escaping to the outside of the stirring tank, is safe and effective, and reduces the risk of personnel being injured by volatile gas or equipment failure caused by deposition of volatile corrosive gas.
[0034] It can be understood that the above embodiments only express the preferred embodiments of the utility model, the description is more specific and detailed, but it can not be understood as the limitation of the utility model patent scope; it should be pointed out that for ordinary skilled person in the art, the above technical features can be freely combined without departing from the concept of the utility model, and a number of modifications and improvements can be made, which belong to the protection scope of the utility model; therefore, any equivalent transformation and modification within the scope of the utility model patent claim should belong to the scope of the utility model patent claim.
Claims
1. A hazardous chemical stirring device for a nuclear power plant, characterized in that: The invention comprises a positioning frame (1), a bottom plate (2) fixedly connected to the bottom of the positioning frame (1), a stirring shaft (3) passing through the bottom plate (2), and a sealing assembly (4); the bottom plate (2) is provided with a through hole for the stirring shaft (3) to pass through; The sealing assembly (4) includes a first skeleton oil seal structure (401) and a water seal assembly, wherein the first skeleton oil seal structure (401) is installed in the through hole and the first skeleton oil seal structure (401) is arranged in contact with the stirring shaft (3), and the water seal assembly includes a water seal positioning plate (403) installed on the bottom plate (2), a water seal partition plate (404) installed on the bottom plate (2), a water seal connector (405) fixedly connected to the stirring shaft (3), and an active liquid (406), wherein an accommodating space (407) for accommodating the active liquid (406) is formed between the water seal positioning plate (403) and the inner wall of the positioning frame (1), a portion of the water seal connector (405) extends into the active liquid (406), and the water seal partition plate (404) is used to separate the accommodating space (407); Alternatively, the sealing assembly (4) comprises a plurality of packing members (408), a packing fixing block (409) and a packing positioning member (410), wherein the packing fixing block (409) is mounted on the bottom plate (2), and the packing fixing block (409) is connected to the packing positioning member (410) via a fastener, and the packing positioning member (410) is sleeved on the outside of the stirring shaft (3), and an installation space is formed between the outer wall of the packing fixing block (409), the lower wall of the packing positioning member (410), the circumferential surface of the stirring shaft (3) and the upper part of the bottom plate (2), and the plurality of packing members (408) are mounted in the installation space; Alternatively, the sealing assembly (4) comprises a plurality of second skeleton oil seal structures (411), a third skeleton oil seal structure (412), a sealing cover plate (413), a sealing connector (414) and a sealing stopper (415); the plurality of second skeleton oil seal structures (411) are installed in the through hole and the plurality of second skeleton oil seal structures (411) are arranged in contact with the stirring shaft (3); the sealing cover plate (413) is installed on the bottom plate (2) and covers the upper portion of the second skeleton oil seal structure (411); the sealing stopper (415) is installed above the sealing cover plate (413) and sleeved on the outer side of the stirring shaft (3); the sealing connector (414) is fixedly connected to the positioning frame (1); and the third skeleton oil seal structure (412) is installed between the outer wall of the sealing stopper (415) and the outer wall of the sealing connector (414).
2. The nuclear power plant hazardous chemicals stirring device according to claim 1, characterized in that: The nuclear power plant hazardous chemical stirring device further comprises a motor reducer (5) and a coupling (6); the motor reducer (5) is mounted on the positioning frame (1), and the output end of the motor reducer (5) is connected to the stirring shaft (3) via the coupling (6).
3. The nuclear power plant hazardous chemicals stirring device according to claim 2, characterized in that: The nuclear power plant hazardous chemical stirring device further comprises a stirrer, which is connected to an end of the stirring shaft (3) away from the motor reducer (5).
4. The hazardous chemical stirring device for a nuclear power plant according to claim 1, characterized in that: A gas sensor is installed in the positioning frame (1).
5. The nuclear power plant hazardous chemicals stirring device according to claim 1, characterized in that: The positioning frame (1) is connected to the base plate (2) by welding.
6. The hazardous chemical stirring device for a nuclear power plant according to claim 1, characterized in that: The positioning frame (1) and the base plate (2) are connected via bolts.
7. The hazardous chemical stirring device for a nuclear power plant according to claim 1, characterized in that: The thickness of the bottom plate (2) is 12 mm to 18 mm.
8. The hazardous chemical stirring device for a nuclear power plant according to claim 1, characterized in that: The positioning frame (1) and the base plate (2) are both made of stainless steel.
9. The nuclear power plant hazardous chemicals stirring device according to claim 1, characterized in that: The diameter of the stirring shaft (3) is 30 mm to 35 mm.
10. The hazardous chemical stirring device for a nuclear power plant according to claim 1, characterized in that: A bearing (416) is installed between the sealing limiter (415) and the sealing connector (414).