Novel marine steam turbine pipeline sealing tool

Abstract

The utility model belongs to the field of marine machinery, and particularly relates to a novel marine steam turbine pipeline sealing tool which comprises a sealing cushion block, a middle cushion block and a fixing nut. The sealing tool is installed at the bottom of the flange through the valve rod and the threaded sleeve. The fixing nut is screwed on the threaded sleeve, and the sealing cushion block and the middle cushion block are fixed through rotation of the fixing nut; the middle cushion block is designed to be of a two-half structure, and fixing and positioning of the middle cushion block are guaranteed through the sealing cushion block and the fixing nut boss structure. The sealing tool is installed at the bottom of the adjusting valve flange to complete hydrostatic tests of all devices and pipeline systems of a main turbine, and the sealing performance of a main turbine set and the pipeline systems of the main turbine set can be effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of ship machinery, and in particular relates to a novel marine steam turbine pipeline sealing tool. Background Art

[0002] After the installation of the main steam turbine unit and other equipment piping system is completed, the piping system should be pressure tested as required. The main purpose of the pressure test is to check the sealing of the piping system and each joint. In order to check the sealing of the pipeline, a water pressure test is generally used.

[0003] Due to the complex installation of the main steam turbine unit pipeline system, the pipeline system has been connected to the main unit equipment through bolted flanges, and the pipeline system sealing test cannot be completed separately. Therefore, in order to complete the water pressure test, the sealing tool is generally installed at the bottom of the regulating valve flange to ensure the sealing of the main unit and its pipeline system. However, the traditional sealing device has a single sealing method, the sealing effect is not ideal, and the disassembly is not strong, which can no longer effectively ensure the sealing of the pipeline system. In order to smoothly carry out the subsequent unit water pressure test, it is necessary to design a new type of sealing tool to meet the water pressure test requirements. Utility Model Content

[0004] The utility model aims to provide a novel main steam turbine unit pipeline sealing tool, which is used to install the sealing tool at the bottom of the regulating valve flange to complete the water pressure test of the main steam turbine equipment and its pipeline system, and can effectively ensure the sealing of the main steam turbine unit and its pipeline system.

[0005] A novel marine steam turbine pipeline sealing tool comprises a sealing gasket, an intermediate gasket and a fixing nut; the sealing tool is installed at the bottom of a flange through a valve stem and a threaded sleeve; the fixing nut is screwed onto the threaded sleeve, and the sealing gasket and the intermediate gasket are fixed by rotating the fixing nut; the intermediate gasket adopts a two-half structure design, and utilizes a boss structure with the sealing gasket and the fixing nut to ensure the fixation and positioning of the intermediate gasket.

[0006] Furthermore, the sealing gasket block is provided with three grooves, into which O-rings of appropriate sizes are placed respectively to ensure axial and radial sealing when the sealing gasket block is attached to the bottom of the flange.

[0007] The beneficial effect of the utility model is that the utility model installs a sealing tool at the bottom of the regulating valve flange to complete the water pressure test of various equipment of the main steam turbine and its pipeline system, which can effectively ensure the sealing of the main steam turbine unit and its pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the utility model;

[0009] Figure 2 It is a cross-sectional view of the utility model. DETAILED DESCRIPTION

[0010] The utility model is further described below in conjunction with the accompanying drawings.

[0011] like Figure 1-Figure 2 As shown, the utility model is installed at the bottom of the flange through the valve stem and the threaded sleeve, wherein the sealing gasket 2 has three grooves, and the O-rings 1 of appropriate sizes are placed respectively to ensure the radial sealing of the bottom of the flange and the axial sealing of the valve stem. At the same time, for the convenience of installation, the middle gasket 3 adopts a two-half structure design, and the boss structure of the contact surface with the sealing gasket 2 and the fixing nut 4 is used to ensure the fixation and positioning of the middle gasket, which is convenient for disassembly and installation. The fixing nut 4 is screwed on the threaded sleeve, and the fixing nut is rotated to provide sufficient pressure to ensure that the sealing tool is tightly fitted on the bottom of the flange. Since the threaded sleeve clamps the valve stem and does not move, the fixing nut can be rotated according to the sealing effect during the water pressure test to provide sufficient pressure to press the O-ring 1 of the sealing tool on the contact surface of the bottom of the flange, and the rotation height can be adjusted according to the technical requirements such as the test water pressure. After the water pressure test is completed, the fixing nut can be unscrewed from the threaded sleeve to directly disassemble the sealing tool.

[0012] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A new type of marine steam turbine pipeline sealing tool, characterized in that: The invention comprises a sealing gasket (2), an intermediate gasket (3) and a fixing nut (4); the sealing tool is installed at the bottom of the flange through a valve stem and a threaded sleeve; the fixing nut (4) is screwed onto the threaded sleeve, and the sealing gasket (2) and the intermediate gasket (3) are fixed by rotating the fixing nut; the intermediate gasket (3) adopts a two-half structure design, and utilizes a boss structure with the sealing gasket (2) and the fixing nut (4) to ensure the fixation and positioning of the intermediate gasket (3).

2. A novel marine steam turbine pipeline sealing tool according to claim 1, characterized in that: The sealing pad (2) is provided with three grooves, into which O-rings (1) of suitable sizes are placed respectively to ensure axial and radial sealing when the sealing pad is attached to the bottom of the flange.

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