Valve shell assembly of industrial steam turbine

Abstract

The utility model relates to the technical field of steam turbine valve shells, in particular to an industrial steam turbine valve shell assembly which comprises a valve shell assembly main body, a valve body is arranged on the valve shell assembly main body, a feeding channel and a discharging channel which are communicated with each other are arranged in the valve body, a filter net basket is clamped in the valve body, a valve seat is further clamped in the valve body, and the valve seat is connected with the valve body. A valve element matched with the valve seat in a clamped mode is arranged in the valve body, a guide rod is connected to the valve element, a lower heat preservation fastening outer shell and an upper heat preservation fastening outer shell which are oppositely clamped are arranged outside the valve shell assembly body, and heat preservation padding is fixed to the inner side of the lower heat preservation fastening outer shell and the inner side of the upper heat preservation fastening outer shell respectively. And the thermal insulation filler is arranged on the outer side parts of the valve cover and the valve body. According to the industrial steam turbine valve shell assembly, the heat preservation fastening shell is arranged outside the industrial steam turbine valve shell assembly, the heat preservation filler is fixed while the valve shell assembly is connected and fastened, the heat preservation performance of the exterior of the valve shell assembly is improved, heat loss is reduced, and the using effect of a valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine valve casings, in particular to an industrial steam turbine valve casing component. Background Art

[0002] A steam turbine is a rotary power machine that converts the thermal energy of steam into mechanical work. It is widely used in power plants, ship propulsion, and power supply in some industrial processes. The valve housing assembly of an industrial steam turbine is one of the key components of the steam turbine. It is used for the installation of the main steam valve and the regulating steam valve. The design and material of these components are crucial to the safety, efficiency, and reliability of the steam turbine.

[0003] Existing industrial steam turbine valve casing assemblies are usually made of high-strength, high-temperature resistant cast steel materials to withstand the working conditions of high-temperature and high-pressure steam. However, in order to prevent the loss of steam heat, the valve casing assembly currently needs to be provided with an external insulation structure when in use. The insulation structure has the problem of not being tightly connected, which affects the insulation effect and is not conducive to the use of the steam valve. Utility Model Content

[0004] The utility model aims to provide an industrial steam turbine valve casing assembly to solve the problem raised in the above-mentioned background technology that, when the valve casing assembly on the market is in use, in order to avoid the loss of steam heat, an insulation structure needs to be arranged on the outside, and the insulation structure has the problem of not being connected tightly enough, which affects the insulation effect and is not conducive to the use of the steam valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an industrial steam turbine valve casing assembly, comprising a valve casing assembly main body, a valve body is provided on the valve casing assembly main body, and the valve body is provided with a feed channel and a discharge channel which are interconnected, a filter basket is clamped in the valve body, and a valve seat is also clamped and installed in the valve body, a valve core which is clamped and matched with the valve seat is provided in the valve body, and a guide rod is connected to the valve core, an opening structure is provided at the upper end of the valve body, and a fastening cover which movably penetrates the guide rod is clamped and fixed at the opening structure of the valve body, and a valve cover is also installed at the upper end of the valve body, a relatively clamped lower insulation fastening shell and an upper insulation fastening shell are provided on the outside of the valve casing assembly main body, and insulation fillers are respectively fixed on the inner sides of the lower insulation fastening shell and the upper insulation fastening shell, and the insulation fillers are arranged on the valve cover and the outer side of the valve body.

[0006] Preferably, the valve body is provided with inlet and outlet connecting flanges of an integral structure at the outer ends of the feed channel and the discharge channel, and welding nuts are respectively welded and fixed at the through holes of the inlet and outlet connecting flanges.

[0007] Preferably, the two ends of the lower thermal insulation fastening shell are sealed and clamped with the lower part of the inlet and outlet connecting flanges through rubber pads, and the bottom of the lower thermal insulation fastening shell is fastened and clamped with a first sealing ring.

[0008] Preferably, the two ends of the upper insulation fastening shell are sealed and clamped with the upper parts of the inlet and outlet connecting flanges by rubber pads, and the upper end of the upper insulation fastening shell is penetrated by the upper end of the valve cover, and the upper end of the upper insulation fastening shell is clamped with a second sealing ring that is fastened with the upper end of the valve cover.

[0009] Preferably, connecting pieces are welded to the outside of two opposite sides of the upper opening of the lower thermal insulation fastening shell, and connecting pieces are also welded to the outside of two opposite sides of the upper opening of the upper thermal insulation fastening shell.

[0010] Preferably, the connecting parts are tightly fitted with rubber pads and are screwed and fixed.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the industrial steam turbine valve housing assembly is provided with a heat-insulating fastening shell on the outside, which not only connects and fastens the valve housing assembly, but also plays a role in fixing the heat-insulating filler, thereby improving the heat-insulating property of the valve housing assembly on the outside, reducing heat loss, and improving the use effect of the valve. The industrial steam turbine valve housing assembly enables the upper and lower heat-insulating fastening shells to be mutually clamped and fixed, and the upper and lower heat-insulating fastening shells are respectively clamped with the valve body to complete the fixation of the external heat-insulating structure, while the heat-insulating filler is tightly fixed in the heat-insulating fastening shell, so that the heat-insulating filler covers the valve housing, thereby reducing heat loss and enhancing the external strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a front view of the interior of an industrial steam turbine valve housing assembly of the utility model;

[0013] Figure 2 This is an external front view of an industrial steam turbine valve housing assembly of the utility model;

[0014] Figure 3 This is an external side view of an industrial steam turbine valve housing assembly of the utility model;

[0015] Figure 4 The utility model is a top view of the connection structure of the upper heat-insulating fastening shell and the connecting piece of an industrial steam turbine valve shell assembly.

[0016] In the figure: 1. Valve housing assembly body; 2. Lower insulation fastening shell; 3. Insulation filler; 4. First sealing ring; 5. Feed channel; 6. Second sealing ring; 7. Guide rod; 8. Upper insulation fastening shell; 9. Filter basket; 10. Valve core; 11. Valve body; 12. Welding nut; 13. Valve seat; 14. Valve cover; 15. Fastening cover; 16. Discharge channel; 17. Inlet and outlet connecting flanges; 18. Connectors. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4The utility model provides a technical solution: an industrial steam turbine valve casing assembly, including a valve casing assembly main body 1, a valve body 11 is provided on the valve casing assembly main body 1, and a feed channel 5 and a discharge channel 16 that are connected to each other are provided in the valve body 11, the valve body 11 is provided with an inlet and outlet connecting flange 17 of an integral structure at the outer ends of the feed channel 5 and the discharge channel 16, and welding nuts 12 are respectively welded and fixed at the through holes of the inlet and outlet connecting flange 17, this structure enables the valve body 11 to be connected and fixed with pipelines on both sides through the inlet and outlet connecting flange 17, and the welding nuts 12 are fixed by welding, so that the welding nuts 12 are arranged in the lower insulation fastening shell 2 and the upper insulation fastening shell 8, so as to avoid affecting the connection between the valve body 11 and the inlet and outlet pipelines on both sides, and the lower insulation The two ends of the fastening shell 2 are respectively fastened and sealed with the lower part of the inlet and outlet connecting flanges 17 by rubber pads, and the bottom of the lower thermal insulation fastening shell 2 is fastened with a first sealing ring 4. This structure allows the lower thermal insulation fastening shell 2 to be covered on the upper part of the outer side of the valve shell assembly body 1, and is positioned by the inlet and outlet connecting flanges 17. The first sealing ring 4 is used for the relative connection between the lower thermal insulation fastening shell 2 and the bottom plug rod or discharge port of the valve shell assembly body 1 to ensure the sealing of the valve shell assembly body 1 covered by the lower thermal insulation fastening shell 2. A filter basket 9 is clamped in the valve body 11, and a valve seat 13 is also clamped and installed in the valve body 11. A valve core 10 that is engaged with the valve seat 13 is provided in the valve body 11, and a guide rod 7 is connected to the valve core 10. The valve body An opening structure is provided at the upper end of 11, and a fastening cover 15 that is movably penetrated by the guide rod 7 is fixedly connected at the opening structure of the valve body 11, and a valve cover 14 is also installed at the upper end of the valve body 11. A relatively clamped lower insulation fastening shell 2 and an upper insulation fastening shell 8 are provided on the outside of the valve shell assembly main body 1. The two ends of the upper insulation fastening shell 8 are respectively clamped and fastened to the upper part of the inlet and outlet connecting flanges 17 through rubber gaskets. The upper end of the upper insulation fastening shell 8 is penetrated by the upper end of the valve cover 14, and the upper end of the upper insulation fastening shell 8 is clamped with a second sealing ring 6 that is fastened and sleeved with the upper end of the valve cover 14. This structure allows the upper insulation fastening shell 8 to be covered in the upper area of ​​the valve shell assembly main body 1, and the connection part of the valve body 11 and the valve cover 14 can be corrosion-resistant. The protective treatment is carried out, and the sealing is improved by the second sealing ring 6 to ensure the insulation effect, so that the lower insulation fastening shell 2 and the upper insulation fastening shell 8 can achieve the purpose of fixing the insulation structure, reduce heat loss, and prevent burns. The external strength of the valve shell assembly body 1 is also improved. The outer sides of the opposite sides of the upper end opening of the lower insulation fastening shell 2 are respectively welded with connecting pieces 18, and the outer sides of the opposite sides of the upper end opening of the upper insulation fastening shell 8 are also respectively welded with connecting pieces 18. This structure enables the lower insulation fastening shell 2 and the upper insulation fastening shell 8 to complete a relatively stable clamping treatment through the connecting pieces 18, which is convenient for the assembly of the lower insulation fastening shell 2 and the upper insulation fastening shell 8, and the inner sides of the lower insulation fastening shell 2 and the upper insulation fastening shell 8 are respectively fixed with insulation fillers 3.In addition, the heat-insulating packing 3 is arranged on the outer side of the valve cover 14 and the valve body 11, and the connecting pieces 18 are tightly fitted by rubber pads, and the connecting pieces 18 are screwed and fixed. This structure enables the lower heat-insulating fastening shell 2 and the upper heat-insulating fastening shell 8 to be sealed and connected and fastened through the cooperation of the connecting pieces 18, thereby ensuring the heat-insulating effect.

[0019] Working principle: When using the industrial steam turbine valve housing assembly, first, the valve seat 13 is clamped and installed in the valve body 11, the filter basket 9 is covered on the valve core 10 through the guide rod 7, and then the guide rod 7 and the valve core 10 are placed in the valve body 11, so that the valve core 10 and the valve seat 13 are matched, and then the fastening cover 15 is passed through the guide rod 7 and positioned and clamped at the upper end opening of the valve body 11, and the guide rod 7 is fixed in the valve cover 14 through the spring assembly, and the valve cover 14 covers the valve body 11 and is screwed and fixed, and the whole process is completed. At the same time as the upper end structure of the valve body 11 is closed, the fixing of the fastening cover 15 is completed, the lower thermal insulation fastening shell 2 covers the bottom of the valve body 11, and is positioned by the clamping connection between the lower thermal insulation fastening shell 2 and the lower part of the inlet and outlet connecting flange 17. The upper thermal insulation fastening shell 8 and the upper part of the valve cover 14 are penetrated and positioned, and then covered on the valve cover 14 and the valve body 11. The upper thermal insulation fastening shell 8 and the upper part of the inlet and outlet connecting flange 17 are positioned by clamping, and the thermal insulation packing 3 is tightly fixed on the upper thermal insulation fastening shell 8. The outer shell 8 and the lower thermal insulation fastening outer shell 2 are inside, and after the upper thermal insulation fastening outer shell 8 and the lower thermal insulation fastening outer shell 2 are assembled, they are close to the valve body 11 and the valve cover 14, which plays a role of heat preservation. The upper thermal insulation fastening outer shell 8 and the lower thermal insulation fastening outer shell 2 play a role of strengthening the external structure and preventing scalding. After the upper thermal insulation fastening outer shell 8 and the lower thermal insulation fastening outer shell 2 are fitted with the connecting piece 18, they are screwed and fixed. After the assembly of the valve shell assembly main body 1 is completed, the feed channel 5 and the discharge channel 16 are screwed and fixed with the feed and discharge pipes respectively through the inlet and outlet connecting flanges 17, and the welding nut 12 cooperates with the bolt to achieve fastening. The first sealing ring 4 plays a role of relative fastening between the lower thermal insulation fastening outer shell 2 and the bottom discharge pipe of the valve body 11 to ensure a sealed connection. The second sealing ring 6 plays a role of relative fastening and sealing between the upper thermal insulation fastening outer shell 8 and the valve cover 14 to ensure sealing, improve insulation effect, and avoid the problem of insufficient insulation caused by traditional external coating insulation materials, thereby completing a series of tasks.

[0020] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An industrial steam turbine valve housing assembly, comprising a valve housing assembly body (1), characterized in that: The valve housing assembly main body (1) is provided with a valve body (11), and the valve body (11) is provided with a feed channel (5) and a discharge channel (16) which are interconnected, a filter basket (9) is clamped in the valve body (11), and a valve seat (13) is also clamped and installed in the valve body (11), a valve core (10) which is clamped and matched with the valve seat (13) is provided in the valve body (11), and a guide rod (7) is connected to the valve core (10), an opening structure is provided at the upper end of the valve body (11), and the valve body (11) is provided with a plurality of valves. A fastening cover (15) movably penetrated by the guide rod (7) is fixedly engaged with the opening structure of the valve body (1), and a valve cover (14) is also installed on the upper end of the valve body (11), and a lower thermal insulation fastening shell (2) and an upper thermal insulation fastening shell (8) that are relatively engaged are arranged on the outside of the valve shell assembly main body (1), and thermal insulation packing (3) is respectively fixed on the inner side of the lower thermal insulation fastening shell (2) and the upper thermal insulation fastening shell (8), and the thermal insulation packing (3) is arranged on the outer side of the valve cover (14) and the valve body (11).

2. An industrial steam turbine valve housing assembly according to claim 1, characterized in that: The valve body (11) is provided with inlet and outlet connecting flanges (17) of an integral structure at the outer ends of the feed channel (5) and the discharge channel (16), and welding nuts (12) are respectively welded and fixed at the through holes of the inlet and outlet connecting flanges (17).

3. An industrial steam turbine valve housing assembly according to claim 2, characterized in that: The two ends of the lower thermal insulation fastening shell (2) are respectively sealed and clamped with the lower part of the inlet and outlet connecting flanges (17) through rubber pads, and the bottom of the lower thermal insulation fastening shell (2) is clamped with a first sealing ring (4).

4. An industrial steam turbine valve housing assembly according to claim 2, characterized in that: The two ends of the upper thermal insulation fastening shell (8) are respectively fastened to the upper parts of the inlet and outlet connecting flanges (17) by means of rubber gaskets for sealing, and the upper end of the upper thermal insulation fastening shell (8) is intersected with the upper end of the valve cover (14), and the upper end of the upper thermal insulation fastening shell (8) is engaged with a second sealing ring (6) that is fastened and sleeved with the upper end of the valve cover (14).

5. The industrial steam turbine valve housing assembly according to claim 1, characterized in that: Connecting pieces (18) are welded to the outside of the two opposite sides of the upper opening of the lower thermal insulation fastening shell (2), and connecting pieces (18) are also welded to the outside of the two opposite sides of the upper opening of the upper thermal insulation fastening shell (8).

6. An industrial steam turbine valve housing assembly according to claim 5, characterized in that: The connecting pieces (18) are tightly fitted together via rubber pads, and the connecting pieces (18) are screwed and fixed together.

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