Anti-vibration locking structure of nuclear power station valve

Abstract

The utility model provides an anti-vibration locking structure of a nuclear power station valve, which relates to the technical field of valves and comprises a valve pipe, the valve pipe is of a one-way valve port structure, a locking valve port is formed on the inner side of one end of the valve pipe, and a locking door matched with the locking valve port is hinged to the inner end of the locking valve port; a locking seat is arranged on the valve pipe, a spring shaft pipe fitting is arranged in the locking seat in a penetrating mode, a rotating shaft is arranged in the spring shaft pipe fitting in a penetrating mode, and a hand wheel sleeve is arranged at the outer end of the rotating shaft. An isolation pipe is embedded between the locking seat and the valve pipe; the utility model has the beneficial effects that the valve pipe structure additionally arranged between the pipeline joints of the valve body is matched with the pressing handle shaft and the locking door which are elastically matched with each other, so that the opening and closing locking control of the locking valve port is completed, and meanwhile, in the structure, the sliding shaft piece in the pressing handle shaft is matched with the spring shaft pipe piece and the rotating shaft; the device can have corresponding anti-vibration reset capability in an application state, and an external hand wheel sleeve can be matched with a hand wheel tool to adjust the rotating shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to an anti-vibration locking structure for nuclear power plant valves. Background Technique

[0002] Due to the increasingly complex working conditions of valves, the sealing performance of valves is regarded as an important indicator of technical performance. There are various valves and different structures. In order to cut off the flow of the medium without leakage, the valve must be able to ensure high-quality sealing for a long time under various complex operating conditions;

[0003] Nuclear power plant valves are valves used in the nuclear island N1, conventional island CI and power plant auxiliary facilities BOP systems of nuclear power plants. In the pipeline of the nuclear island system, due to the changes in the flow rate and medium pressure of the pump body medium in the pipeline itself, the valve structure of the actual pipeline valve body is prone to relatively frequent system vibrations, and it is easy to have differences in the opening and closing ports of the valve body due to vibrations, which further affects the pipeline medium and the airtightness of the valve body. Content of the Utility Model

[0004] In view of the above technical problems existing in the prior art, an anti-vibration locking structure for nuclear power plant valves is provided.

[0005] The purpose and efficacy of the utility model are achieved by the following specific technical means:

[0006] An anti-vibration locking structure for nuclear power plant valves, including a valve pipe, the valve pipe is a single-way to valve port structure, one end inner side of the valve pipe forms a locking valve port, and a matching lock door is hinged at the inner end of the locking valve port;

[0007] A locking seat is arranged on the valve pipe, a spring shaft pipe fitting is penetrated in the locking seat, a rotating shaft is penetrated in the spring shaft pipe fitting, and a handwheel sleeve is arranged at the outer end of the rotating shaft;

[0008] An isolation pipe is embedded between the locking seat and the valve pipe, a sliding shaft part connected to the rotating shaft is arranged in the isolation pipe, and a pressing handle shaft in close contact with the lock door is arranged at the end of the sliding shaft part.

[0009] Further, one end of the valve pipe relative to the locking valve port is hinged with a damping rod, and the damping rod is in abutting cooperation with the lock door.

[0010] Further, the damping rod is a wheel shaft type folding structure, and the maximum folding angle of the damping rod is less than 60°.

[0011] Further, a handle frame is installed on the locking seat, and the handwheel sleeve is inserted on the handle frame.

[0012] Further, the axial connection end of the isolation pipe and the pressing handle shaft is treated with oil seal.

[0013] Furthermore, a wheel axle structure is provided at the contact end of the pressing handle shaft and the door lock, and the rolling direction of the wheel axle structure is matched with the hinged direction of the door lock.

[0014] Furthermore, a limit plate arranged axially is sleeved at one end of the sliding shaft member close to the rotating shaft.

[0015] Furthermore, at least 2 mm of sliding distance allowance is reserved between the sliding shaft member and the isolation pipe.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] For this anti-vibration locking structure of a nuclear power plant valve, through the valve pipe structure installed between the joint of the valve body and the pipeline, and by cooperating with the elastic cooperation between the pressing handle shaft and the door lock to complete the opening and closing locking control of the locking valve port. At the same time, in the structure, through the cooperation of the sliding shaft member in the pressing handle shaft with the spring shaft pipe fitting and the rotating shaft, it can have corresponding anti-vibration reset ability in the application state, and can adjust the rotating shaft through the externally provided handwheel sleeve and handwheel tool, thereby adjusting the opening and closing states of the entire valve body and the door lock, improving the applicability and practicability of this locking structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the present utility model;

[0019] Figure 2 is the internal planar structural schematic diagram of the present utility model;

[0020] Figure 3 is the structural schematic diagram of the pressing handle shaft of the present utility model.

[0021] Markings in the figure: 1-valve pipe; 2-locking seat; 3-handle frame; 4-handwheel sleeve; 5-locking valve port; 6-door lock; 7-damping rod; 8-pressing handle shaft; 9-isolation pipe; 10-spring shaft pipe fitting; 11-rotating shaft; 12-sliding shaft member; 13-limit plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Please refer to Figures 1-3 , and further describe the embodiments of the present utility model;

[0023] An anti-vibration locking structure of a nuclear power plant valve includes a valve pipe 1. The valve pipe 1 is a single-way valve port structure. One end inside the valve pipe 1 forms a locking valve port 5, and a matching door lock 6 is hinged at the inner end of the locking valve port 5;

[0024] A locking seat 2 is arranged on the valve pipe 1. A spring shaft pipe fitting 10 is penetrated through the locking seat 2, and a rotating shaft 11 is penetrated through the spring shaft pipe fitting 10. A handwheel sleeve 4 is arranged at the outer end of the rotating shaft 11;

[0025] An isolation pipe 9 is embedded between the locking seat 2 and the valve pipe 1. A sliding shaft member 12 connected to the rotating shaft 11 is arranged in the isolation pipe 9, and a pressing handle shaft 8 in close contact with the locking door 6 is arranged at the end of the sliding shaft member 12.

[0026] This structure mainly uses a one-way valve body structure in cooperation with the way of pipeline connection as the valve body pipeline locking structure in the pipeline system valve. The two ends of the valve pipe 1 correspond to the inlet and outlet ports of the pipeline. Among them, the locking valve port 5 corresponds to the inlet port of the pipeline. The locking door 6 is used to control the opening and closing of the locking valve port 5. The opening and closing state of the locking valve port 5 is controlled by the lifting movement of the pressing handle shaft 8 in contact and cooperation with the locking door 6. That is, when the positions of the rotating shaft 11 and the spring shaft pipe fitting 10 are relatively fixed, the pressing handle shaft 8 in the axial direction abuts against the locking door 6 to limit the opening and closing state and the opening and closing degree of the locking door 6.

[0027] At the same time, considering the flow medium flow rate, pressure change of the pipeline system and the vibration influence of the pipeline system, in this structure, through the elastic cooperation between the spring shaft pipe fitting 10 and the sliding shaft member 12 in the pressing handle shaft 8, when the spring shaft pipe fitting 10 and the rotating shaft 11 are in relatively fixed positions, the axial position of the sliding shaft member 12 is elastically reset by the spring shaft pipe fitting 10 to correct and maintain the contact position between the pressing handle shaft 8 and the locking door 6. That is, to avoid the influence of pipeline vibration on this locking structure and improve the practicability of this locking structure.

[0028] Preferably, a damping rod 7 is hinged at one end of the valve pipe 1 relative to the locking valve port 5, and the damping rod 7 is in abutting cooperation with the locking door 6. The setting of the damping rod 7 provides moving damping for the opening and closing process of the locking door 6 to improve the moving accuracy and stability of the locking door 6.

[0029] Preferably, the damping rod 7 is a wheel shaft type folding structure, and the maximum folding angle of the damping rod 7 is less than 60°. The relative control of the folding angle amplitude is used to ensure the effective contact degree when the damping rod 7 abuts against the locking door 6 at the maximum and minimum folding angles, that is, to ensure the damping supply accuracy of the damping rod 7.

[0030] Preferably, a handle frame 3 is installed on the locking seat 2, and the handwheel sleeve 4 is inserted into the handle frame 3. Through the externally connected handwheel sleeve 4 and the handle frame 3 structure, it is convenient for subsequent operations when adjusting the opening and closing degree of the locking door 6 in the locking combination.

[0031] Preferably, the axial connection end of the isolation pipe 9 and the pressing handle shaft 8 is treated with an oil seal. Through the sealing treatment of the pipeline port of the isolation pipe 9, the safety and airtightness of the axial moving structure of the pressing handle shaft 8 are ensured.

[0032] Preferably, a wheel axle structure is provided at the contact end of the pressing handle shaft 8 and the locking door 6, and the rolling direction of the wheel axle structure is matched with the hinged direction of the locking door 6, and the rolling of the wheel axle structure is used to improve the smoothness of the hinged cooperation activity between the pressing handle shaft 8 and the locking door 6 during the axial displacement.

[0033] On the above basis, a limit plate 13 arranged axially is sleeved at one end of the sliding shaft member 12 close to the rotating shaft 11, and the axially arranged limit plate 13 is used to limit the minimum sliding distance between the sliding shaft member 12 and the rotating shaft 11, so as to avoid the damage to the abutting distance between the pressing handle shaft 8 and the locking door 6 caused by the excessive axial displacement of the rotating shaft 11.

[0034] Preferably, there is at least a 2-mm sliding distance margin reserved between the sliding shaft member 12 and the isolation tube 9. Further, through the reserved sliding margin of the sliding shaft member 12, protection is provided for the sliding process of the sliding shaft member 12, and it is avoided that the vibration affects the opening and closing degree of the locking door 6 and is excessively transmitted to the connection end of the sliding shaft member 12 and the rotating shaft 11 through the sliding of the pressing handle shaft 8.

[0035] The implementation manner of this device is as follows:

[0036] The structure uses the two ends of the valve tube 1 as the docking ports in the nuclear power valve body pipeline system. Among them, the locking valve port 5 corresponds to the pipeline inlet, and the pipeline medium enters and exits unidirectionally through both ends of the pipeline of the locking valve port 5. During its control, the axial position of the rotating shaft 11 can be adjusted manually by connecting an external handwheel tool to the handwheel sleeve 4, that is, changing the abutting position between the end pressing handle shaft 8 and the locking door 6, that is, adjusting the opening and closing degree of the locking door 6 for the locking valve port 5 to change the flow rate of the valve body medium. During the process, the sliding structures of the pressing handle shaft 8, the sliding shaft member 12 and the isolation tube 9 can also be used to cooperate with the elastic structure of the spring shaft pipe member 10 to buffer the vibration of the pipeline system. At the same time, the position of the rotating shaft 11 is relatively fixed, and it is reset through the elastic structure to avoid the influence of the pipeline system vibration on the opening and closing degree of the valve body.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A nuclear power plant valve anti-vibration locking structure, comprising a valve tube (1), characterized in that: The valve tube (1) is a single-way valve port structure, a locking valve port (5) is formed on the inner side of one end of the valve tube (1), and a matching locking door (6) is hingedly provided on the inner end of the locking valve port (5); The valve tube (1) is provided with a locking seat (2), a spring shaft pipe (10) is provided through the locking seat (2), a rotating shaft (11) is provided through the spring shaft pipe (10), and a hand wheel sleeve (4) is provided at the outer end of the rotating shaft (11); An isolation tube (9) is embedded between the locking seat (2) and the valve tube (1), a sliding shaft (12) connected to the rotating shaft (11) is arranged in the isolation tube (9), and a pressure handle shaft (8) in close contact with the lock door (6) is arranged at the end of the sliding shaft (12).

2. A nuclear power plant valve anti-vibration locking structure according to claim 1, characterized in that: A damping rod (7) is hingedly provided at one end of the valve tube (1) relative to the locking valve port (5), and the damping rod (7) is in abutment with the locking door (6).

3. A nuclear power plant valve anti-vibration locking structure according to claim 2, characterized in that: The damping rod (7) is a wheel-axle folding structure, and the maximum folding angle of the damping rod (7) is less than 60°.

4. A nuclear power plant valve anti-vibration locking structure according to claim 1, characterized in that: The locking seat (2) is connected to a handle frame (3), and a hand wheel sleeve (4) is inserted into the handle frame (3).

5. The anti-vibration locking structure of a nuclear power plant valve according to claim 1, characterized in that: The connection end between the isolation tube (9) and the pressing handle shaft (8) is axially oil-sealed.

6. The anti-vibration locking structure of a nuclear power plant valve according to claim 1, characterized in that: The contact end between the pressing handle shaft (8) and the lock door (6) is provided with a wheel axle structure, and the rolling direction of the wheel axle structure matches the hinge direction of the lock door (6).

7. The anti-vibration locking structure of a nuclear power plant valve according to claim 1, characterized in that: An axially arranged limiting plate (13) is sleeved on one end of the sliding shaft member (12) close to the rotating shaft (11).

8. The anti-vibration locking structure of a nuclear power plant valve according to claim 1, characterized in that: A sliding margin of at least 2 mm is reserved between the sliding shaft member (12) and the isolation tube (9).

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