A main steam valve spool insertion tool

Abstract

The present application relates to the technical field of turbine main valve core installation, in particular to a main valve core insertion tool. The insertion tool comprises at least a bracket and a bolt, the valve core is installed on the bracket through the bolt and can be hoisted horizontally through the bracket, after the valve core is horizontally inserted into the valve shell, the bolt is rotated, and the valve core is pushed into place under the action of the bolt. The main valve core insertion tool provided by the present application can be installed and inserted when the cylinder is normally installed and positioned, which can effectively save the time of main valve core assembly and reduce the safety hazards during installation. Gradual axial positioning through the bolt helps to improve the installation accuracy and efficiency of the valve core, and solves the problem that the valve core cannot be pushed horizontally.

Description

Technical Field

[0001] This invention relates to the field of turbine main steam valve core installation technology, specifically to a main steam valve core insertion tool. Background Technology

[0002] A steam turbine is a high-pressure, high-temperature, high-speed rotating machine that performs work by being driven by steam with certain parameters. The installation and fitting of the various parts and components of a steam turbine are relatively precise, and the quality of installation of each part directly affects the efficiency and even the safety of operation.

[0003] Existing steam turbines with small diameter, high speed, high temperature and high pressure are characterized by the main steam valve and regulating valve being welded to the upper front cylinder through valve housings. The main steam valve is often arranged laterally, and the valve core inside the valve housing is not easy to install in the factory or at the user's site.

[0004] The existing main steam valve core is mainly installed by lifting and tilting the cylinder to fix it so that the main steam valve body is vertically upward, and then installing the valve core according to the assembly process sequence. This installation method has the following drawbacks:

[0005] (1) The cylinder is a large cast steel part. There are few support points for lifting and side placement and the center of gravity is unstable, which poses a great safety risk and is prone to accidents that cause injury to people and property.

[0006] (2) The cylinder is placed on its side so that the main steam valve housing is arranged vertically and the main steam valve core is assembled. This does not match the lateral state of the design during installation and operation, and cannot guarantee that the final installation requirements are consistent with the design.

[0007] (3) The main steam valve with this structure is generally a skid-mounted unit. Users must use tools to assist in the insertion and installation on site. Even for distributed units, the main steam valve installation is generally in the later stage of installation. At this time, the front and rear cylinders have been assembled and the main steam valve core cannot be installed by placing the cylinders on the side. Summary of the Invention

[0008] Based on the above description, the purpose of this invention is to provide a main steam valve core insertion tool. This tool can conveniently insert and fix the valve core when the main steam valve housing is horizontally positioned during normal cylinder installation, and can accurately locate the valve core installation position. This helps to improve the valve core installation accuracy and efficiency of the main steam valve with horizontal cylinder arrangement, and improve the installation quality of the steam turbine.

[0009] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a main steam valve core insertion tool, comprising at least a bracket and a bolt, wherein the valve core is mounted on the bracket by the bolt and can be horizontally lifted by the bracket, and after the valve core is horizontally inserted into the valve body, the bolt is rotated and the valve core is pushed into place under the action of the bolt.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the longitudinal section of the bracket is L-shaped, the valve core is installed on the longitudinal arm of the bracket, the cross arm of the bracket is provided with lifting points, and the cross arm and the valve core are installed on the same side of the longitudinal arm.

[0012] Furthermore, the longitudinal arm of the bracket is provided with a mounting hole, through which the extended end of the valve core passes and is mounted on the bracket.

[0013] Furthermore, during valve core insertion and installation, the bracket is fixed to the valve body.

[0014] Furthermore, it also includes a sleeve, on which a valve stem is mounted, and the sleeve is fitted onto the valve stem and clamped between the valve stem nut and the bushing flange on the valve stem to fix the valve stem.

[0015] Furthermore, the valve core is fixedly mounted on the longitudinal arm of the bracket by studs and bolts.

[0016] Furthermore, the studs and bolts are arranged in a uniformly staggered ring.

[0017] Furthermore, three studs and three bolts are provided, which are evenly interlaced in a ring to install the valve core on the bracket.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0019] The main steam valve core insertion tool provided by this invention has a scientific and practical structure and is easy to operate. During installation and insertion, the cylinder can be installed and positioned normally, which can effectively save the assembly time of the main steam valve core, save costs, and reduce safety hazards during installation.

[0020] Gradually guiding and positioning the valve core along the axial direction with bolts helps improve the installation accuracy and efficiency, and also solves the problem that the valve core cannot be pushed laterally. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the main steam valve core insertion tool provided in an embodiment of the present invention;

[0022] Figure 2 This is a front view of the insertion bracket of the main steam valve core insertion tool provided in an embodiment of the present invention;

[0023] Figure 3 This is a side view of the main steam valve insertion tool insertion bracket provided in an embodiment of the present invention;

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Bracket, 2. Fastener, 3. Bolt, 4. Stud, 5. Sleeve. Detailed Implementation

[0026] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0027] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0028] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediary element.

[0029] Example 1

[0030] like Figures 1-3 As shown, a main steam valve core insertion tool includes at least a bracket 1 and a bolt 3. The valve core is mounted on the bracket 1 by the bolt 3 and can be horizontally lifted by the bracket 1. After the valve core is horizontally inserted into the valve body, the bolt 3 is rotated, and the valve core is further pushed into place under the action of the bolt 3.

[0031] It is understandable that the structure of bracket 1 has multiple options, such as a T-shaped structure or an L-shaped structure. In this embodiment, the longitudinal section of bracket 1 is an L-shaped structure. The valve core is installed on the longitudinal arm of bracket 1. A lifting point is provided on the transverse arm of bracket 1. The valve core and the transverse arm are located on the same side of the longitudinal arm. When lifted by the lifting point, the valve core can be in a horizontal state.

[0032] Furthermore, mounting holes are provided on the longitudinal arm of bracket 1, and the extended end of the valve core passes through these mounting holes and is mounted on bracket 1. When the valve core is inserted for installation, bracket 1 is fixed to the valve body. Alternatively, bracket 1 can be mounted on the valve body via a flange, and washers can be installed at the fastening bolts during installation.

[0033] Furthermore, the valve core is fixedly mounted on the longitudinal arm of the bracket 1 by studs 4 and bolts 3. The studs and bolts are preferably arranged in a uniformly staggered ring. It is understood that, in this case, push-up bolts can also be used.

[0034] For example, three studs 4 and three bolts 3 are provided, evenly staggered in a ring shape, to mount the valve core on the bracket 1. See details. Figure 3 .

[0035] Furthermore, multiple lifting points can be set to better ensure the horizontal state of the valve core.

[0036] In use, first install the valve core onto the longitudinal arm of bracket 1 using bolts 3 and studs 4. Then, lift the lifting position on the transverse arm of bracket 1 to insert the entire valve core horizontally into the main steam valve body. At this point, bracket 1 can be fixed to the valve body using the flange structure. Remove studs 4, and continue tightening bolts 3 to push the valve core into place. Removing bracket 1 completes the valve core installation. Gradually guiding and positioning the valve core axially using bolts 3 helps improve the installation accuracy and efficiency of the valve core and solves the problem of the valve core being unable to be pushed laterally.

[0037] Example 2

[0038] The difference between this embodiment and embodiment 1 is that it also includes a sleeve 5. A valve stem is installed on the valve core. The sleeve 5 is sleeved on the valve stem and clamped between the valve stem nut and the complete flange on the valve core to fix the valve stem. The sleeve 5 is used to fix the valve stem in the valve core to prevent the bracket 1 from moving when it is inserted together with the valve core, which could damage the valve stem or valve body, etc., and pose a safety hazard.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A main steam valve core insertion tool, characterized in that, It includes at least a bracket (1) and a bolt (3). The valve core is mounted on the bracket (1) by the bolt (3) and can be horizontally lifted by the bracket (1). After the valve core is horizontally inserted into the valve body, the bolt (3) is rotated and the valve core is pushed into place by the action of the bolt (3). It also includes a sleeve (5). A valve stem is installed on the valve core. The sleeve (5) is sleeved on the valve stem and clamped between the valve stem nut and the bushing flange on the valve core to fix the valve stem.

2. The main steam valve core insertion tool according to claim 1, characterized in that, The longitudinal section of the bracket (1) is L-shaped. The valve core is installed on the longitudinal arm of the bracket (1). The cross arm of the bracket (1) is provided with a lifting point, and the cross arm and the valve core are installed on the same side of the longitudinal arm.

3. The main steam valve core insertion tool according to claim 1, characterized in that, The bracket (1) has a mounting hole on its longitudinal arm, and the extended end of the valve core passes through the mounting hole and is mounted on the bracket (1).

4. The main steam valve core insertion tool according to any one of claims 1 to 3, characterized in that, When the valve core is inserted for installation, the bracket (1) is fixed on the valve body.

5. The main steam valve core insertion tool according to claim 1, characterized in that, The valve core is fixedly mounted on the longitudinal arm of the bracket (1) by studs (4) and bolts (3).

6. The main steam valve core insertion tool according to claim 5, characterized in that, The studs (4) and bolts (3) are evenly and alternately arranged in a ring.

7. The main steam valve core insertion tool according to claim 6, characterized in that, The studs (4) and bolts (3) are each provided in threes, which are evenly interlaced in a ring to install the valve core on the bracket (1).

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