Mounting structure of steam extraction regulating valve

Abstract

The utility model belongs to steam turbine technical field more specifically relates to a kind of installation structure of extraction regulating valve, including the extraction pipeline of being installed on steam turbine cylinder body, installation seat is provided on the extraction pipeline, valve hole that installation seat is provided with being connected with the inside of extraction pipeline, several positioning holes and several screw holes are provided on the installation seat, extraction regulating valve includes valve cover, valve core and the drive mechanism of driving valve core, the positioning pin corresponding positioning hole and the fixed bolt corresponding screw hole are provided on the valve cover, the valve core slides in valve hole, positioning structure is provided between the installation seat and valve seat, by being provided with positioning hole and screw hole on installation seat, cooperate with the positioning pin and fixed bolt on valve cover, the quick, accurate installation positioning of being realized;And the positioning structure between installation seat and valve seat further improves the accuracy, stability of installation.

Description

Technical Field

[0001] This utility model belongs to the field of steam turbine technology, and more specifically relates to an installation structure for a steam extraction regulating valve. Background Technology

[0002] Traditional extraction steam regulating valves are installed on the extraction steam pipeline of the turbine cylinder. The existing regulating valves have a cumbersome installation process and low positioning accuracy during installation, which not only increases the cost of installation and maintenance, but may also lead to safety hazards such as steam leakage and reduced regulation accuracy, thereby affecting production efficiency and equipment service life. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an installation structure for a steam extraction regulating valve, which enables rapid and precise installation of the valve body through positioning holes, positioning pins, and positioning rings.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an installation structure for a steam extraction regulating valve, comprising a steam extraction pipe installed on a turbine cylinder block, a mounting seat provided on the steam extraction pipe, a valve hole provided on the mounting seat communicating with the interior of the steam extraction pipe, a plurality of positioning holes and a plurality of screw holes provided on the mounting seat, the steam extraction regulating valve comprising a valve cover, a valve core and a driving mechanism for driving the valve core, a positioning pin corresponding to the positioning hole and a fixing bolt corresponding to the screw hole provided on the valve cover, the valve core sliding within the valve hole, and a positioning structure provided between the mounting seat and the valve seat.

[0005] Furthermore, the positioning structure includes a positioning ring sleeve located on the mounting base, a positioning groove is provided on the inner ring surface of the positioning ring sleeve, and a positioning block corresponding to the positioning groove is provided on the valve cover.

[0006] Furthermore, the length of the locating pin extending out of the valve seat surface is greater than the length of the bolt end extending out of the valve seat surface.

[0007] Furthermore, a sealing gasket is provided between the valve seat and the mounting base.

[0008] Furthermore, the mounting base is welded to the steam extraction pipe.

[0009] Compared with the prior art, the beneficial effects of this utility model are: by setting positioning holes and screw holes on the mounting base, which cooperate with the positioning pins and fixing bolts on the valve cover, fast and accurate installation positioning is achieved; the positioning structure between the mounting base and the valve seat and the setting of the sealing gasket further improve the installation accuracy, stability and sealing performance. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the installation structure of the steam extraction regulating valve of this utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the steam extraction regulating valve before installation.

[0012] Reference numerals: 1. Steam extraction pipe; 2. Mounting seat; 3. Valve hole; 4. Positioning hole; 5. Screw hole; 6. Valve cover; 7. Valve core; 8. Drive mechanism; 9. Positioning ring; 10. Positioning groove; 11. Sealing gasket; 12. Fixing bolt; 13. Positioning pin. Detailed Implementation

[0013] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0014] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0015] Reference Figure 1 and Figure 2 The present invention will be further described below.

[0016] An installation structure for an extraction steam regulating valve includes an extraction steam pipe 1 installed on a steam turbine cylinder block. A mounting base 2 is provided on the extraction steam pipe 1. The mounting base 2 has a valve hole 3 communicating with the interior of the extraction steam pipe 1. The mounting base 2 has several positioning holes 4 and several screw holes 5. The extraction steam regulating valve includes a valve cover 6, a valve core 7, and a driving mechanism 8 for driving the valve core 7. The valve cover 6 has positioning pins 13 corresponding to the positioning holes 4 and fixing bolts 12 corresponding to the screw holes 5. The valve core 7 slides within the valve hole 3. A positioning structure is provided between the mounting base 2 and the valve seat. Figure 1 and Figure 2As shown, during installation, the locating pin 13 on the valve cover 6 is aligned with the locating hole 4 on the mounting base 2 to quickly position the valve cover 6. Then, the valve cover 6 is fixedly connected to the mounting base 2 using the fixing bolts 12 and screw holes 5. The quick and precise installation positioning is achieved by the cooperation between the locating hole 4 on the mounting base 2 and the locating pin 13 on the valve cover 6. Figure 1 As shown, in this preferred embodiment, the positioning structure includes a positioning ring 9 located on the mounting base 2. A positioning groove 10 is provided on the inner ring surface of the positioning ring 9, and a positioning block (not shown in the attached diagram) corresponding to the positioning groove 10 is provided on the valve cover 6. Specifically, during installation, initial positioning can be achieved by the positioning groove 10 on the positioning ring 9 engaging with the positioning block on the valve cover 6. After the valve cover 6 extends into the positioning ring 9, precise positioning is then achieved through the positioning pin 13 and the positioning hole 4, further improving the installation accuracy and stability. Figure 1 As shown, in this preferred embodiment, the length of the locating pin 13 extending beyond the surface of the valve cover 6 is greater than the length of the end of the fixing bolt 12 extending beyond the surface of the valve cover 6, so that the locating pin 13 can first engage with the locating hole 4 to achieve positioning. Figure 1 As shown, in this preferred embodiment, a sealing gasket 11 is provided between the valve cover 6 and the mounting base 2 to improve the installation sealing performance. In this preferred embodiment, the mounting base 2 is welded to the extraction steam pipe 1.

[0017] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An installation structure for a steam extraction regulating valve, characterized in that: The system includes an extraction steam pipe installed on the turbine cylinder block, a mounting seat on the extraction steam pipe, a valve hole on the mounting seat communicating with the interior of the extraction steam pipe, a plurality of positioning holes and a plurality of screw holes on the mounting seat, and an extraction steam regulating valve including a valve cover, a valve core and a driving mechanism for driving the valve core, the valve cover having a positioning pin corresponding to the positioning hole and a fixing bolt corresponding to the screw hole, the valve core sliding within the valve hole, and a positioning structure between the mounting seat and the valve seat.

2. The installation structure of the steam extraction regulating valve according to claim 1, characterized in that: The positioning structure includes a positioning ring sleeve located on the mounting base, a positioning groove provided on the inner ring surface of the positioning ring sleeve, and a positioning block corresponding to the positioning groove provided on the valve cover.

3. The installation structure of the steam extraction regulating valve according to claim 1, characterized in that: The length of the locating pin extending out of the valve seat surface is greater than the length of the bolt end extending out of the valve seat surface.

4. The installation structure of the steam extraction regulating valve according to claim 1, characterized in that: A sealing gasket is provided between the valve seat and the mounting base.

5. The installation structure of the steam extraction regulating valve according to claim 1, characterized in that: The mounting base is welded to the steam extraction pipe.

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