CN214889710U - Ice plug isolating device for nuclear power station - Google Patents

Abstract

The utility model relates to a nuclear power station overhaul of equipments detection area especially relates to an ice plug isolating device for nuclear power station, press from both sides the cover and be used for including the ice plug that has at least one cavity provide the air supply unit of refrigerant in the cavity, the ice plug press from both sides be provided with on the cover with the entry and the export of cavity intercommunication, be provided with baffling portion on the inner wall of cavity, baffling portion will a plurality of parts of mutual intercommunication are separated into to the cavity, the utility model discloses a design runner adds the stroke of the flow of cooling gas in the die cavity to reach the little advantage of liquid nitrogen loss, simultaneously the utility model discloses the structure has easy dismounting's is limited.

Description

Ice plug isolating device for nuclear power station

Technical Field

The utility model relates to a nuclear power station overhaul of equipment detection area especially relates to a plug isolating device for nuclear power station.

Background

In a nuclear power station, a plurality of different types of blast valves are arranged on systems such as automatic pressure relief, low-pressure safety injection, containment vessel recirculation and the like, and the main function of the blast valves is to execute safety related functions when an accident occurs. And according to the maintenance requirement, the blasting valves of different models need to be subjected to sampling inspection in each refueling period. However, the pipeline in which the burst valve is located cannot be completely isolated during service, and the system in which it is located is also radioactive. Therefore, servicing of the burst valve requires that the system be emptied and that the risk of radioactive leakage due to improper isolation be reduced.

At present, a nuclear power station mainly adopts a liquid nitrogen ice plug as an isolation means, but the common liquid nitrogen ice plug often has a plurality of defects: firstly, the equipment is more and heavier, and the field use is inconvenient; secondly, the liquid nitrogen is gasified quickly and consumes much amount; thirdly, the equipment installation time is long, so that the radiation dose born by personnel is high; fourthly, the heat transfer efficiency of the equipment is low, the heat preservation effect is poor, and the ice blockage operation process is longer.

In the prior art, a chinese patent application publication No. CN110748750A discloses a double-layer ice plug jacket, which includes an upper chamber and a lower chamber, wherein the upper chamber and the lower chamber are both arc-shaped and are vertically symmetrical along a horizontal plane; the two open ends of the upper cavity are fixedly connected with upper pressing plates, the two open ends of the lower cavity are fixedly connected with lower pressing plates, and the upper cavity and the lower cavity are fixedly connected through a plurality of bolt holes in the upper pressing plates and the lower pressing plates; the circular arc top ends of the upper chamber and the lower chamber are respectively provided with a filling joint for filling liquid nitrogen up and down simultaneously; the upper chamber is also provided with a plurality of pressure relief valves for discharging residual air and ensuring that the upper chamber and the lower chamber are filled with liquid nitrogen; go up the cavity with lower cavity is bilayer structure, and all pack in the closed cavity has insulation material, can fill into the liquid nitrogen after, and furthest's reduction air conditioning leaks, practices thrift economic cost greatly.

However, the inventor of the present application finds that the above technical solutions have at least the following technical problems:

because the principle of liquid nitrogen cooling is the heat absorption physical process of vaporization, the scheme that above-mentioned prior art adopted has certain requirement to the compressive capacity of liquid nitrogen holding die cavity, and its plug installation adopts a plurality of bolts to fix moreover, and the installation is complicated, and is inefficient.

SUMMERY OF THE UTILITY MODEL

To the technical problem that above-mentioned prior art exists, the utility model provides a frozen plug isolating device for nuclear power station, the utility model discloses a design runner adds the stroke of the flow of extension cooling gas in the die cavity to reach the little advantage of liquid nitrogen loss, simultaneously the utility model discloses the structure has easy dismounting's advantage.

The ice plug isolating device for the nuclear power station comprises an ice plug jacket with at least one chamber and an air supply device for supplying a refrigerant into the chamber, wherein the ice plug jacket is provided with an inlet and an outlet which are communicated with the chamber, the inner wall of the chamber is provided with a baffling part, and the chamber is divided into a plurality of parts which are communicated with each other by the baffling part.

Preferably, the baffle portion includes a plurality of baffle members, and baffle notches are formed in end portions of different sides of two adjacent baffle members.

Preferably, the baffles are arranged in parallel along the axial direction of the pipeline to be isolated.

Preferably, the ice plug jacket comprises a first arc-shaped block and a second arc-shaped block; the first arc-shaped block body and the second arc-shaped block body are detachably wrapped and installed on the outer wall surface of the pipeline to be isolated; the first arc-shaped block body is internally provided with a first cavity, a first inlet and a first outlet which are communicated with the first cavity, and the second arc-shaped block body is internally provided with a second cavity, a second inlet and a second outlet which are communicated with the second cavity.

Preferably, the first arc-shaped block body is connected with one end of the two ends of the second arc-shaped block body, which are in contact with each other, in a hinged mode, and the other end of the first arc-shaped block body is connected with the other end of the second arc-shaped block body in a locking manner.

Preferably, the first arc-shaped block body and the second arc-shaped block body are connected with each other by locking at two contacted ends.

Preferably, in the above technical solution, the first inlet and the second inlet are provided with quick-connect plugs.

Preferably, in the above technical solution, the first outlet and the second outlet are connected to an elbow pipe.

Preferably, in the technical scheme, an insulating layer is further arranged on the periphery of the cavity in the ice plug jacket structure.

The periphery mentioned in the above technical scheme refers to the outer side surface of the chamber, that is, the contact surface of the chamber and the pipeline to be isolated is the inner side surface of the chamber, and no heat-insulating layer is arranged at the position.

Preferably, the ice plug jacket is a cladding made of an aluminum alloy material.

To sum up, the utility model has the advantages of it is following:

1. the utility model prolongs the gas flow stroke of the liquid nitrogen after the liquid nitrogen is vaporized in the liquid nitrogen accommodating cavity through the pipeline design, fully improves the heat conversion efficiency and saves the liquid nitrogen consumption;

2. the utility model has the advantages that the structural design is exquisite, the sleeving operation can be completed by sleeving the first arc-shaped block body and the second arc-shaped block body on the pipeline and locking the structure in a locking manner, the operation personnel can be seriously injured to the body when the radiation time of the operation personnel is too long in the nuclear industry operation, and the rapid installation manner of the structure can effectively reduce the radiation time of the operation personnel;

3. the utility model discloses the primary structure adopts the aluminum alloy to make, greatly reduced overall structure's weight on the material and the structural design who dismantles easily makes operating personnel can more the efficient carry out the valve and overhaul.

Drawings

FIG. 1 is a simplified illustration of the application configuration;

FIG. 2 is an isometric view of an ice plug collet configuration according to an embodiment of the present application;

FIG. 3 is a front view of an ice plug collet configuration according to an embodiment of the present application;

FIG. 4 is a side view of an ice plug collet configuration according to an embodiment of the present application;

FIG. 5 is a cross-sectional view of an ice plug collet configuration according to an embodiment of the present application;

FIG. 6 is a schematic view of the internal structure of a chamber in all embodiments of the present application;

FIG. 7 is a side view of an alternative embodiment of an ice plug collet configuration of the present application;

wherein, 1-ice plug jacket, 1.1-first arc block, 1.2-second arc block, 2-air supply device, 1.3-heat preservation layer, a-baffle part, a-1-baffle part, 3-butterfly bolt, 4-elastic lock catch and 5-hand pull ring.

Detailed Description

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like as referred to or as may be referred to in this specification are defined with respect to the configuration shown in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component and are relative terms, and thus may be changed accordingly depending on the position and the state of use of the particular component. Therefore, these and other directional terms should not be construed as limiting terms.

The invention is further explained below with reference to the following examples:

example 1:

an ice plug isolation device for a nuclear power station, please refer to fig. 1, includes an ice plug jacket 1 wrapped at the upstream of a burst valve of the nuclear power station and an air supply device 2 for providing a refrigerant for a cavity of the ice plug jacket 1, wherein the refrigerant is liquid nitrogen, and the air supply device 2 is connected to a refrigerant inlet of the ice plug jacket 1.

Referring to fig. 2, 3 and 4, the ice plug jacket 1 mainly includes a first arc block 1.1 and a second arc block 1.2, the first arc block 1.1 and the second arc block 1.2 both include a chamber therein, the first arc block 1.1 and the second arc block 1.2 are semi-circular, when they are spliced together, two contact ends are provided, one contact end is provided with a butterfly bolt 3 to hinge the two together, the other end of the contact of the two is provided with two elastic lock catches 4 which can controllably lock the two in a free opening and closing state, based on the matching use of the butterfly bolt 3 and the elastic lock catches 4, the ice plug jacket 1 can be freely arranged on the outer wall surface of a pipeline to be isolated, which needs to be wrapped, a first inlet and a first outlet are also arranged on the first arc-shaped block body 1.1, and the first inlet and the first outlet are both connected with the inner environment of the cavity of the first arc-shaped block body 1.1; the second arc-shaped block body 1.2 is also provided with a second inlet and a second outlet which are both connected with the internal environment of the cavity of the first arc-shaped block body 1.1; the first inlet and the second inlet are provided with quick connectors which are quickly connected with hoses connected with the air supply device 2; the first outlet and the second outlet are provided with clamping sleeve joints for connecting metal bent pipes so as to change the nitrogen gas discharge direction; two hand pull rings 5 are arranged near the elastic lock catch 4 and are respectively arranged on the outer surfaces of the first arc-shaped block body 1.1 and the second arc-shaped block body 1.2 so as to be convenient to operate to open and close; referring to fig. 5, a heat insulation layer 1.3 is further disposed on the periphery of the cavity in the structure of the ice plug jacket 1, the ice plug jacket 1 may be made of an all-aluminum alloy material, the heat insulation layer 1.3 may be of a double-layer structure, a vacuum manner is adopted in the middle of the double-layer structure to prevent heat conduction to achieve a heat insulation effect, and the heat insulation layer 1.3 may also be made of other heat insulation materials or structures in order to achieve the heat insulation effect or consider safety issues.

Referring to fig. 6, the inner wall of the cavity inside the ice plug jacket 1 is provided with a baffling part a, the baffling part a is a plurality of plate-shaped baffling pieces a-1, different side ports of two adjacent baffling pieces a-1 are provided with baffling gaps, and the baffling pieces a-1 are arranged in parallel along the axis direction of the isolation pipeline, the arrangement mode enables the length of the whole flow channel to be lengthened, the refrigeration effect time of the refrigerant to be longer, and meanwhile, the parallel arrangement mode is simpler in structural design and convenient to manufacture.

Example 2:

referring to fig. 7, the difference from embodiment 1 is that two ends of the first arc-shaped block 1.1 and the second arc-shaped block 1.2, which are in contact with each other, are connected by using a lock, that is, two ends are locked by using four elastic locks 4. The same can reach embodiment 1 installation effect, but the installation effectiveness is obviously less than embodiment 1, and the benefit of comparative example 1 lies in that first arc block 1.1 and second arc block 1.2 can be disassembled into two individuals, convenient storage.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. An ice plug isolating device for a nuclear power station, which comprises an ice plug jacket (1) with at least one chamber and a gas supply device (2) for supplying refrigerant into the chamber, wherein the ice plug jacket (1) is provided with an inlet and an outlet which are communicated with the chamber, and the ice plug isolating device is characterized in that: the inner wall of the chamber is provided with a baffling part (a), and the baffling part (a) divides the chamber into a plurality of parts which are communicated with each other.

2. An ice plug isolating device for a nuclear power plant according to claim 1, characterized in that: the deflection part (a) comprises a plurality of deflection pieces (a-1), and deflection notches are formed in the end parts of different sides of every two adjacent deflection pieces (a-1).

3. An ice plug isolating device for a nuclear power plant according to claim 2, characterized in that: the baffles (a-1) are arranged in parallel along the axial direction of the pipeline to be isolated.

4. An ice plug isolating device for a nuclear power plant according to claim 1, 2 or 3, characterized in that: the ice plug jacket (1) comprises a first arc-shaped block body (1.1) and a second arc-shaped block body (1.2); the first arc-shaped block body (1.1) and the second arc-shaped block body (1.2) are detachably wrapped and installed on the outer wall surface of the pipeline to be isolated; a first cavity, a first inlet and a first outlet which are communicated with the first cavity are arranged in the first arc-shaped block body (1.1), and a second cavity, a second inlet and a second outlet which are communicated with the second cavity are arranged in the second arc-shaped block body (1.2).

5. An ice plug isolating device for a nuclear power plant according to claim 4, wherein: the first arc-shaped block body (1.1) and one end of the two ends of the second arc-shaped block body (1.2) which are contacted with each other are connected in a hinged mode, and the other ends of the first arc-shaped block body and the second arc-shaped block body are connected through lock catches.

6. An ice plug isolating device for a nuclear power plant according to claim 4, wherein: the two ends of the first arc-shaped block body (1.1) and the second arc-shaped block body (1.2) which are contacted with each other are connected by adopting a lock catch.

7. An ice plug isolating device for a nuclear power plant according to claim 4, wherein: the first inlet and the second inlet are provided with quick connectors.

8. An ice plug isolating device for a nuclear power plant according to claim 4, wherein: the first outlet and the second outlet are connected with a bent pipe.

9. An ice plug isolating device for a nuclear power plant according to claim 1, characterized in that: and an insulating layer (1.3) is also arranged on the periphery of the cavity in the ice plug jacket (1) structure.

10. An ice plug isolating device for a nuclear power plant according to claim 1, characterized in that: the ice plug jacket (1) is a cladding piece made of aluminum alloy material.

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