Pre-starting type valve element structure convenient to disassemble, assemble and maintain and atmospheric discharge valve

Abstract

The utility model relates to the technical field of valve design, in particular to a pre-starting type valve element structure convenient to disassemble, assemble and maintain and an atmospheric discharge valve. The pre-starting type valve element structure convenient to disassemble, assemble and maintain comprises a valve rod, the valve rod comprises a rod part and a baffle located at one end of the rod part, the valve rod is of an integrated structure, and a main valve element and a pre-starting valve element penetrate through the bottom of the main valve element. The atmospheric discharge valve comprises the pre-starting type valve element structure convenient to disassemble, assemble and maintain. The structure of the pre-starting type valve element is optimized, the risk that the valve cannot be opened due to the fact that the nut falls off is avoided, and meanwhile the structure of the pre-starting type valve element is convenient for maintainers to disassemble, assemble and maintain in the overhaul period.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve design technical field, especially, a pre-opening type valve core structure and atmospheric discharge valve convenient to dismouting maintenance. BACKGROUND

[0002] In the valve core part of the atmospheric discharge valve used in nuclear power station, the pre-opening valve core bottom is fastened through big gasket and nut to keep the connection with the main valve core, but the valve working condition is relatively harsh, the vibration is relatively big, there is the risk of nut falling off, and the atmospheric discharge valve will not be opened after the nut falling off. The nut can be fixed through welding and pinning, but it is inconvenient to disassemble during overhaul. SUMMARY

[0003] The utility model solves the technical problem that: provide a pre-opening type valve core structure and atmospheric discharge valve convenient to dismouting maintenance, optimize the structure of pre-opening type valve core, avoid the risk of valve opening failure caused by nut falling off, and the structure is convenient for maintenance personnel to disassemble and maintain during overhaul.

[0004] The utility model provides a pre-opening type valve core structure convenient to dismouting maintenance, which comprises:

[0005] The valve rod comprises a rod part and a baffle located at one end of the rod part,

[0006] The valve rod is an integral structure and is penetrated and installed into the main valve core and the pre-opening valve core from the main valve core bottom.

[0007] In a specific embodiment of the utility model, the rod part of the valve rod is provided with a step.

[0008] In a specific embodiment of the utility model, the through hole at the connection of the main valve core and the valve rod is provided with a step.

[0009] In a specific embodiment of the utility model, the pre-opening valve core is located in the groove of the main valve core.

[0010] In a specific embodiment of the utility model, a spring is arranged between the pre-opening valve core and the main valve core.

[0011] In a specific embodiment of the utility model, the valve rod and the pre-opening valve core are fastened through a locking nut.

[0012] In a specific embodiment of the utility model, a locking washer is arranged between the locking nut and the pre-opening valve core.

[0013] In a specific embodiment of the utility model, the locking washer is a wedge washer.

[0014] The utility model provides a kind of atmospheric discharge valve, including the pre-opening valve core structure of easy dismounting maintenance described above.

[0015] Compared with prior art, the pre-opening valve core structure of easy dismounting maintenance and atmospheric discharge valve of the utility model have the following beneficial effects:

[0016] (1) the valve stem with baffle of integrated type is used to connect the pre-opening valve core and main valve core, and the nut connected with the pre-opening valve core and main valve core is removed, so that the risk of valve opening failure caused by nut falling is avoided from the source.

[0017] (2) the valve core component after assembly is independent part, and no part is wasted during dismounting maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 a valve core component structure diagram is shown;

[0019] Figure 2 a three-dimensional view of valve core component is shown;

[0020] Figure 3 a valve stem structure schematic diagram is shown;

[0021] Figure 4 a main valve core structure diagram is shown;

[0022] Figure 5 a pre-opening valve core structure diagram is shown;

[0023] In the figure, 1 is valve stem, 2 is main valve core, 3 is spring, 4 is pre-opening valve core, 5 is locking nut, and 6 is locking washer. DETAILED DESCRIPTION

[0024] In order to further understand the utility model, the implementation scheme of the utility model is described below in combination with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, and are not limited to the utility model.

[0025] The embodiment of the utility model discloses a pre-opening valve core structure easy to dismount and maintain, as shown in Figure 1 and 2 , comprising:

[0026] Valve stem 1, comprising stem part and baffle located at one end of stem part,

[0027] The valve stem 1 is an integral structure, which is inserted into the main valve core 2 and the pre-opening valve core 4 from the bottom of the main valve core.

[0028] Specifically, as Figure 3As shown, the bottom of the valve stem 1 is provided with a baffle, the baffle drives the main valve core 2 to move upward along the baffle upwardly, and a step is arranged at the baffle,

[0029] The pre-activation valve core 4 passes through the valve stem 1, the bottom of the pre-activation valve core 4 is attached to the end face of the step, and the upper part of the pre-activation valve core 4 is fixed with the valve stem 1 through the locking washer 6 and the locking nut 5.

[0030] The step portion has a guiding effect,

[0031] Similarly, a step is arranged in the through hole at the connection between the main valve core 2 and the valve stem 1, so that the valve stem 1 and the main valve core 2 cannot rotate relative to each other, and the locking nut 5 can be conveniently pre-tightened.

[0032] The valve stem 1 and the pre-activation valve core 4 are fastened through the locking nut 5.

[0033] The locking nut 5 and the pre-activation valve core 4 are provided with a locking washer 6.

[0034] The locking washer is preferably a wedge washer, which can effectively avoid loosening caused by vibration.

[0035] The valve stem 1 and the pre-activation valve core 4 are designed to use the fastening means of “locking washer + locking nut”, which optimizes the original pin fastening mode, and not only optimizes the fastening mode, but also realizes damage-free fastening.

[0036] The pre-activation valve core 4 is located in the groove of the main valve core 2.

[0037] The pre-activation valve core 4 and the main valve core 2 are provided with a spring 3.

[0038] The outer wall of the main valve core is provided with a guide ring.

[0039] The pre-activation valve core structure of the utility model does not need welding and pin fastening, and is harmless to the valve inner part.

[0040] The utility model discloses a pre-activation valve core structure, which is easy to disassemble and maintain.

[0041] The embodiment of the utility model discloses a kind of atmospheric discharge valves, including the pre-activation valve core structure of the technical solution described above being easy to disassemble and maintain.

[0042] The above embodiments are only used to help understand the method and its core idea of the utility model. It should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the utility model, the utility model can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the utility model.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pre-opening valve core structure that is easy to disassemble and maintain, characterized in that, include: Valve stem, including a stem portion and a baffle located at one end of the stem portion. The valve stem is an integral structure, with the main valve core and pre-opening valve core inserted through the bottom of the main valve core.

2. The pre-opening valve core structure for easy disassembly and maintenance according to claim 1, characterized in that, The valve stem has a stepped section.

3. The pre-opening valve core structure for easy disassembly and maintenance according to claim 2, characterized in that, The through hole at the connection between the main valve core and the valve stem is stepped.

4. The pre-opening valve core structure for easy disassembly and maintenance according to claim 1, characterized in that, The pre-start valve core is located within the groove of the main valve core.

5. The pre-opening valve core structure for easy disassembly and maintenance according to claim 4, characterized in that, A spring is provided between the pre-start valve core and the main valve core.

6. The pre-opening valve core structure for easy disassembly and maintenance according to claim 1, characterized in that, The valve stem and the pre-opening valve core are fastened together by a lock nut.

7. The pre-opening valve core structure for easy disassembly and maintenance according to claim 6, characterized in that, A locking washer is provided between the locking nut and the pre-opening valve core.

8. The pre-opening valve core structure for easy disassembly and maintenance according to claim 7, characterized in that, The locking washer is a wedge washer.

9. An atmospheric discharge valve, characterized in that, Includes the pre-opening valve core structure that is easy to disassemble and maintain, as described in any one of claims 1 to 8.

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