CN113513617A

CN113513617A - Damping check valve for ventilation system of nuclear power station

Info

Publication number: CN113513617A
Application number: CN202110532038.3A
Authority: CN
Inventors: 夏云龙; 袁其林; 吁鹏飞; 胡鹏
Original assignee: Jiangsu Dunan Environmental Control System Co ltd
Current assignee: Jiangsu Dunan Environmental Control System Co ltd
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-10-19

Abstract

The invention discloses a vibration reduction type check valve for a ventilation system of a nuclear power station, which comprises a valve body assembly, a bearing assembly, a transmission shaft and a heavy hammer assembly, wherein the transmission shaft penetrates through the valve body assembly, the transmission shaft is connected with the valve body assembly through the bearing assembly, the heavy hammer assembly is arranged at one end of a damper, the heavy hammer assembly is arranged at the other end of the damper, the damper connecting plate is fixedly arranged at the valve body assembly, the structural design is novel, the damper is additionally arranged between the valve body assembly and the heavy hammer assembly, the closing process of the valve is slow and stable, the stability of the torque borne by the transmission shaft is maintained, the valve plate assembly is in a slightly-opened state, the wind pressure in a pipeline is stabilized, the vibration phenomena of the heavy hammer assembly and the valve plate assembly are effectively slowed down, and the accidents of the breakage of the transmission shaft and the tearing of the valve plate assembly are avoided.

Description

Damping check valve for ventilation system of nuclear power station

Technical Field

The invention relates to the technical field of check valves, in particular to a vibration reduction type check valve for a ventilation system of a nuclear power station.

Background

The existing check valve of the nuclear power station has the defects that: 1. the opening angle is unstable, so that the wind pressure in the pipeline cannot be stabilized at a required value; 2. the requirement value of the air pressure in the pipeline is high, the opening pressure difference of the check valve is large, the mass of the counterweight hammer assembly is large, and accidents of transmission shaft breakage and valve plate assembly tearing are easily caused.

When the wind pressure in the pipeline is increased and the opening pressure difference is reached, the valve plate assembly is opened, the pressure in the pipeline is rapidly reduced after the valve plate assembly is opened, and the valve plate assembly is rapidly closed under the action of gravity of the heavy hammer assembly. This process is constantly relapseing, can lead to the interior wind pressure of pipeline constantly to change, also can lead to weight subassembly and valve plate subassembly to be in the vibration state always, makes transmission shaft and valve plate subassembly very easily reach fatigue limit.

Disclosure of Invention

The invention aims to provide a damping check valve for a ventilation system of a nuclear power station, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a nuclear power station is damping formula check valve for ventilation system, includes valve body subassembly, bearing assembly, transmission shaft and weight subassembly, the transmission shaft runs through the valve body subassembly, the transmission shaft passes through bearing assembly and is connected with the valve body subassembly, the weight subassembly is installed in the transmission shaft, the weight subassembly is installed in attenuator one end, the attenuator other end is installed in the attenuator connecting plate, attenuator connecting plate fixed mounting is in the valve body subassembly.

Preferably, the application provides a damping formula check valve for nuclear power station ventilation system, wherein, attenuator one end is connected with the weight subassembly through first round pin axle, the attenuator other end is connected with the attenuator connecting plate through second round pin axle.

Preferably, the application provides a damping formula check valve for nuclear power station ventilation system, wherein, the valve body subassembly inner chamber sets up the wind channel, valve body subassembly one end sets up the air inlet end, and the other end sets up the air-out end.

Preferably, the application provides a nuclear power station is damping formula check valve for ventilation system, wherein, still includes the valve plate subassembly, the valve plate subassembly is installed in the valve body subassembly inner chamber, and installs in valve body subassembly air inlet end inboard.

Preferably, the application provides a damping check valve for a ventilation system of a nuclear power plant, wherein the use method comprises the following steps:

A. when the wind pressure and the torque acted on the transmission shaft by the valve plate component are larger than the torque acted on the transmission shaft by the heavy hammer component, the valve plate component is opened;

B. after the valve plate assembly is opened, the air pressure in the pipeline is reduced, and when the air pressure and the torque acted on the transmission shaft by the valve plate assembly are smaller than the torque acted on the transmission shaft by the heavy hammer assembly, the valve plate assembly is closed;

C. at the moment, the damper has a reaction force acting on the heavy hammer assembly, so that the closing process of the valve is slow and stable, and finally, the wind pressure, the torque acted on the transmission shaft by the valve plate assembly, the damper and the heavy hammer assembly are maintained in a stable range, so that the valve plate assembly is in a slightly-opened state;

D. when the ventilation in the pipeline is stopped, the wind pressure is 0, and the check valve plate assembly is closed

Compared with the prior art, the invention has the beneficial effects that: the valve plate component is in a slightly-opened state, the air pressure in a pipeline is stabilized, the vibration phenomenon of the heavy hammer component and the valve plate component is effectively slowed down, and accidents of transmission shaft fracture and valve plate component tearing are avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view taken along line A-A of FIG. 1;

in the figure: valve body subassembly 1, bearing assembly 2, transmission shaft 3, weight subassembly 4, attenuator 5, attenuator connecting plate 6, first round pin axle 7, second round pin axle 8, air inlet end 9, air-out end 10, valve plate subassembly 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a nuclear power station is damping formula check valve for ventilation system, includes valve body subassembly 1, bearing assembly 2, transmission shaft 3 and weight subassembly 4, transmission shaft 3 runs through valve body subassembly 1, transmission shaft 3 passes through bearing assembly 2 and is connected with valve body subassembly 1, weight subassembly 4 is installed in transmission shaft 3, weight subassembly 4 is installed in 5 one end of attenuator, the 5 other ends of attenuator are installed in

attenuator connecting plate

6, 6 fixed mounting in valve body subassembly 1 of attenuator connecting plate.

In the invention, one end of a damper 5 is connected with a heavy hammer component 4 through a first pin shaft 7, and the other end of the damper 5 is connected with a damper connecting plate 6 through a second pin shaft 8.

In the invention, an air duct is arranged in the inner cavity of the valve body assembly 1, and an air inlet end 9 is arranged at one end of the valve body assembly 1, and an air outlet end 10 is arranged at the other end of the valve body assembly.

The air inlet valve further comprises a valve plate assembly 11, wherein the valve plate assembly 11 is arranged in the inner cavity of the valve body assembly 1 and is arranged on the inner side of the air inlet end 9 of the valve body assembly.

The working principle is as follows: the using method of the invention comprises the following steps:

D. when the ventilation is stopped in the pipeline, the wind pressure is 0, and the check valve plate assembly is closed.

In conclusion, the valve has novel structural design, the damper is additionally arranged between the valve body assembly and the heavy hammer assembly, so that the closing process of the valve is slow and stable, the stability of the torque borne by the transmission shaft is maintained, the valve plate assembly is in a slightly opened state, the air pressure in a pipeline is stabilized, the vibration phenomena of the heavy hammer assembly and the valve plate assembly are effectively relieved, and the accidents of transmission shaft breakage and valve plate assembly tearing are avoided.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a nuclear power station is damping formula check valve for ventilation system which characterized in that: including valve body subassembly (1), bearing assembly (2), transmission shaft (3) and weight subassembly (4), valve body subassembly (1) is run through in transmission shaft (3), transmission shaft (3) are connected with valve body subassembly (1) through bearing assembly (2), weight subassembly (4) are installed in transmission shaft (3), weight subassembly (4) are installed in attenuator (5) one end, attenuator (5) other end is installed in attenuator connecting plate (6), attenuator connecting plate (6) fixed mounting is in valve body subassembly (1).

2. A vibration damping check valve for a nuclear power plant ventilation system as claimed in claim 1, wherein: one end of the damper (5) is connected with the heavy hammer component (4) through a first pin shaft (7), and the other end of the damper (5) is connected with the damper connecting plate (6) through a second pin shaft (8).

3. A vibration damping check valve for a nuclear power plant ventilation system as claimed in claim 1, wherein: the air-conditioning valve is characterized in that an air channel is arranged in the inner cavity of the valve body assembly (1), one end of the valve body assembly (1) is provided with an air inlet end (9), and the other end of the valve body assembly is provided with an air outlet end (10).

4. A vibration damping check valve for a nuclear power plant ventilation system as claimed in claim 1, wherein: still include valve plate subassembly (11), valve plate subassembly (11) are installed in valve body subassembly (1) inner chamber, and install in valve body subassembly air inlet end (9) inboard.

5. The use method of the vibration damping type check valve for the ventilation system of the nuclear power station, which is characterized by comprising the following steps of: the using method comprises the following steps: