A steam turbine unit super-high temperature and high-pressure valve shell cast steel piece

Abstract

The utility model discloses a kind of steam turbine unit superhigh temperature high-pressure valve shell cast steel parts, including valve shell cast steel part main body, valve cavity is provided in the valve shell cast steel part main body, the valve shell cast steel part main body is located on the upper end port position of valve cavity and is provided with positioning recess, positioning recess is embeddedly provided with valve rod positioning block, the upper end surface middle position of valve rod positioning block is provided with valve rod through-hole, the upper end of the valve shell cast steel part main body is provided with valve cover, the lower end of the valve cover is pressed valve rod positioning block;The valve cover is vertically provided with valve rod installation through-hole in valve rod through-hole position alignment;The valve shell cast steel part main body is provided with several blocks of heat-insulating material connecting lug and several blocks of heat-insulating material positioning lug.The above technical solution, structure design is reasonable, valve shell assembly operation is simple, valve rod positioning is reliable, heat-insulating material installation is easy, not easy to loosen and good practicality.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine technology, specifically to a cast steel part for an ultra-high temperature and high pressure valve shell of a steam turbine unit. Background Technology

[0002] The intermediate pressure valve of the steam turbine is a key control component in the steam system of the steam turbine. It mainly undertakes functions such as safety protection, flow regulation and operating condition adaptation. When the unit sheds load or overspeeds, the intermediate pressure main steam valve (including the oil-controlled trip valve) can cut off the steam inlet passage of the intermediate pressure cylinder within 0.2 seconds to prevent steam from continuing to push the rotor and causing an overspeed accident.

[0003] The existing high-temperature and high-pressure valve housing cast steel parts of steam turbine units have an unreasonable structural design, making valve housing assembly complex. Due to the lack of a valve stem positioning structure, the valve stem will wobble significantly, leading to unstable operation. In addition, the outer surface of the high-temperature and high-pressure valve housing cast steel parts of steam turbine units is smooth and lacks insulation material connection structure, making insulation material installation troublesome, prone to loosening, and impractical. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cast steel valve shell for ultra-high temperature and high pressure steam turbine units with reasonable structural design, simple valve shell assembly operation, reliable valve stem positioning, easy installation of insulation materials, non-loosening and good practicality.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cast steel valve housing for a steam turbine unit with ultra-high temperature and high pressure, comprising a main body of the cast steel valve housing, a valve cavity being provided inside the main body of the cast steel valve housing, a positioning groove being provided at the upper port of the main body of the cast steel valve housing, a valve stem positioning block being embedded in the positioning groove, a valve stem through hole being provided at the middle of the upper end face of the valve stem positioning block, a valve cover being provided at the upper end of the main body of the cast steel valve housing, and the lower end of the valve cover pressing against the valve stem positioning block;

[0006] The valve cover is vertically provided with a valve stem mounting through hole aligned with the valve stem through hole position;

[0007] The main body of the valve body cast steel component is provided with several insulation material connecting protrusions and several insulation material positioning protrusions.

[0008] The present invention is further configured such that: a first connecting flange is integrally provided on the left end of the main body of the valve body cast steel component, and a plurality of first insulation material connecting protrusions are integrally provided on the first connecting flange, and each first insulation material connecting protrusion is provided with at least one first bolt connecting through hole; a second connecting flange is integrally provided on the right end of the main body of the valve body cast steel component, and a plurality of second insulation material connecting protrusions are integrally provided on the second connecting flange, and each second insulation material connecting protrusion is provided with at least one second bolt connecting through hole.

[0009] The present invention is further configured such that: a third heat insulation material connecting protrusion is integrally provided on the upper left end of the valve cover, and at least one third bolt connecting through hole is provided on the third heat insulation material connecting protrusion; a fourth heat insulation material connecting protrusion is integrally provided on the upper right end of the valve cover, and at least one fourth bolt connecting through hole is provided on the fourth heat insulation material connecting protrusion.

[0010] The present invention is further configured such that: a first thermal insulation material positioning protrusion is integrally provided on the upper left end of the main body of the valve housing cast steel part; a second thermal insulation material positioning protrusion is integrally provided on the lower left end of the main body of the valve housing cast steel part; a third thermal insulation material positioning protrusion is integrally provided on the lower end of the main body of the valve housing cast steel part; and a fourth thermal insulation material positioning protrusion is integrally provided on the upper right end of the main body of the valve housing cast steel part.

[0011] The present invention is further configured such that: a fifth thermal insulation material positioning protrusion is integrally provided on the left end of the valve cover, and a sixth thermal insulation material positioning protrusion is integrally provided on the right end of the valve cover.

[0012] The present invention is further configured such that: the main body of the valve housing cast steel part is provided with an interconnected feed channel and a discharge channel; the lower end of the valve cavity is provided with a valve seat mounting protrusion; the middle part of the valve seat mounting protrusion is provided with a medium passage hole; and the main body of the valve housing cast steel part is provided with a filter screen mounting groove at the edge of the valve seat mounting protrusion.

[0013] The beneficial effects of this utility model are: compared with the prior art, this utility model has a reasonable structural design. The valve stem positioning block is embedded in the positioning groove of the main body of the valve shell cast steel part located at the upper port of the valve cavity. The upper end of the main body of the valve shell cast steel part is fastened to the valve cover by bolts. The valve cover presses the valve stem positioning block, and the valve stem positioning block can play a positioning role for the valve stem, so that the valve stem shakes less and the operation is stable.

[0014] In addition, the main body of the valve shell cast steel and the valve cover structure are reasonably designed. The connecting protrusions and positioning protrusions of each insulation material not only play a reinforcing role, but also make the insulation material easy to install, easy to fix, reliable to connect, not easy to loosen, and practical.

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is an exploded view of an embodiment of the present invention. Detailed Implementation

[0018] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] See Figures 1 to 2 This utility model discloses a cast steel valve housing for a steam turbine unit with ultra-high temperature and high pressure. It includes a main body 1 of the cast steel valve housing, a valve cavity 11 is provided inside the main body 1 of the cast steel valve housing, a positioning groove 12 is provided at the upper port of the main body 1 of the cast steel valve housing, a valve stem positioning block 2 is embedded in the positioning groove 12, a valve stem through hole 21 is provided at the middle of the upper end face of the valve stem positioning block 2, a valve cover 3 is provided at the upper end of the main body 1 of the cast steel valve housing, and the lower end of the valve cover 3 presses against the valve stem positioning block 2.

[0020] The valve cover 3 is vertically provided with a valve stem mounting through hole 31 aligned with the valve stem through hole 21;

[0021] The main body 1 of the valve shell cast steel part is provided with several heat insulation material connecting protrusions and several heat insulation material positioning protrusions.

[0022] Preferably, the inner bottom surface of the positioning groove 12 is provided with multiple threaded blind holes, the upper end face of the valve stem positioning block 2 is provided with a bolt through hole aligned with each threaded blind hole, the valve cover 3 is provided with a bolt mounting through hole aligned with each bolt through hole, and a fixing bolt passes through the upper end of the valve cover 3, the valve stem positioning block 2 and the main body of the valve shell cast steel part, and the valve cover 3 and the valve stem positioning block 2 are locked and fixed by the fixing bolt.

[0023] To make the structural design of this utility model more reasonable, as a preferred embodiment, the left end of the main body 1 of the valve shell cast steel component is integrally provided with a first connecting flange 13, and the first connecting flange 13 is integrally provided with a plurality of first insulation material connecting protrusions 131, each of the first insulation material connecting protrusions 131 being provided with at least one first bolt connecting through hole 132; the right end of the main body 1 of the valve shell cast steel component is integrally provided with a second connecting flange 14, the second connecting flange 14 being integrally provided with a plurality of second insulation material connecting protrusions 141, each of the second insulation material connecting protrusions 141 being provided with at least one second bolt connecting through hole 142.

[0024] The upper left end of the valve cover 3 is integrally provided with a third thermal insulation material connecting protrusion 32, and the third thermal insulation material connecting protrusion 32 is provided with at least one third bolt connecting through hole 321; the upper right end of the valve cover 3 is integrally provided with a fourth thermal insulation material connecting protrusion 33, and the fourth thermal insulation material connecting protrusion 33 is provided with at least one fourth bolt connecting through hole 331.

[0025] The upper left end of the main body 1 of the cast steel valve housing is integrally provided with a first thermal insulation material positioning protrusion 15; the lower left end of the main body 1 of the cast steel valve housing is integrally provided with a second thermal insulation material positioning protrusion 16; the lower end of the main body 1 of the cast steel valve housing is integrally provided with a third thermal insulation material positioning protrusion 17; and the upper right end of the main body 1 of the cast steel valve housing is integrally provided with a fourth thermal insulation material positioning protrusion 18.

[0026] The valve cover 3 has a fifth insulation material positioning protrusion 34 integrally provided on the left end, and the valve cover 3 has a sixth insulation material positioning protrusion 35 integrally provided on the right end.

[0027] The main body 1 of the cast steel valve housing is provided with an inlet channel 19 and an outlet channel 110 that are interconnected. The lower end of the valve cavity 11 is provided with a valve seat mounting protrusion 111, and the middle part of the valve seat mounting protrusion 111 is provided with a medium passage hole 112. The main body 1 of the cast steel valve housing is provided with a filter screen mounting groove 113 at the edge of the valve seat mounting protrusion.

[0028] In practical applications, the valve stem positioning block 2 is embedded in the positioning groove 12 located at the upper end of the valve cavity 11 of the valve body cast steel part 1. The upper end of the valve body cast steel part 1 is fastened to the valve cover 3 by bolts. The valve cover 3 presses the valve stem positioning block 2, and the valve stem positioning block 2 can position the valve stem, so that the valve stem shakes less and the operation is stable.

[0029] In addition, the main body 1 of the valve shell cast steel and the valve cover 3 have a reasonable structural design. The connecting protrusions and positioning protrusions of each insulation material not only play a reinforcing role, but also make the insulation material easy to install, convenient to fix, reliable to connect, not easy to loosen, and practical.

[0030] The above description of the specific embodiments of this utility model is only used to further illustrate this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-essential improvements and adjustments made to this utility model by technical engineers based on the above description of the utility model shall fall within the scope of protection of this utility model.

Claims

1. A steam turbine unit ultra-high temperature and high-pressure valve housing cast steel piece, comprising a valve housing cast steel piece main body (1), a valve cavity (11) is arranged in the valve housing cast steel piece main body (1), characterized in that: The main body (1) of the valve housing cast steel part is provided with a positioning groove (12) at the upper port of the valve cavity (11). A valve stem positioning block (2) is embedded in the positioning groove (12). A valve stem through hole (21) is provided at the middle of the upper end face of the valve stem positioning block (2). A valve cover (3) is provided at the upper end of the main body (1) of the valve housing cast steel part. The lower end of the valve cover (3) presses against the valve stem positioning block (2). The valve cover (3) is vertically provided with a valve stem mounting through hole (31) aligned with the valve stem through hole (21); The main body (1) of the valve shell cast steel part is provided with several heat insulation material connecting protrusions and several heat insulation material positioning protrusions.

2. The ultra-high temperature, high-pressure valve casing cast steel piece of a steam turbine set according to claim 1, characterized in that: The main body (1) of the valve body cast steel component is integrally provided with a first connecting flange (13) on the left end. The first connecting flange (13) is integrally provided with a plurality of first insulation material connecting protrusions (131). Each first insulation material connecting protrusion (131) is provided with at least one first bolt connecting through hole (132). The main body (1) of the valve body cast steel component is integrally provided with a second connecting flange (14) on the right end. The second connecting flange (14) is integrally provided with a plurality of second insulation material connecting protrusions (141). Each second insulation material connecting protrusion (141) is provided with at least one second bolt connecting through hole (142).

3. The ultra-high temperature, high-pressure valve casing cast steel piece of a steam turbine set according to claim 2, characterized in that: The upper left end of the valve cover (3) is integrally provided with a third insulation material connecting protrusion (32), and at least one third bolt connecting through hole (321) is provided on the third insulation material connecting protrusion (32); the upper right end of the valve cover (3) is integrally provided with a fourth insulation material connecting protrusion (33), and at least one fourth bolt connecting through hole (331) is provided on the fourth insulation material connecting protrusion (33).

4. The ultra-high temperature, high-pressure valve casing cast steel piece of a steam turbine set according to claim 3, characterized in that: The upper left end of the main body (1) of the valve housing cast steel part is integrally provided with a first thermal insulation material positioning protrusion (15); the lower left end of the main body (1) of the valve housing cast steel part is integrally provided with a second thermal insulation material positioning protrusion (16); the lower end of the main body (1) of the valve housing cast steel part is integrally provided with a third thermal insulation material positioning protrusion (17); and the upper right end of the main body (1) of the valve housing cast steel part is integrally provided with a fourth thermal insulation material positioning protrusion (18).

5. The ultra-high temperature, high-pressure valve casing cast steel piece of a steam turbine set according to claim 4, characterized in that: The valve cover (3) has a fifth insulation material positioning protrusion (34) integrally provided on the left end, and the valve cover (3) has a sixth insulation material positioning protrusion (35) integrally provided on the right end.

6. The ultra-high temperature and high-pressure valve casing cast steel piece of a steam turbine set according to claim 1 or 5, characterized in that: The main body (1) of the valve housing cast steel part is provided with an interconnected feed channel (19) and a discharge channel (110). The lower end of the valve cavity (11) is provided with a valve seat mounting protrusion (111). The middle part of the valve seat mounting protrusion (111) is provided with a medium passage hole (112). The main body (1) of the valve housing cast steel part is provided with a filter screen mounting groove (113) located at the edge of the valve seat mounting protrusion.

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