CN216382738U - High-pressure main steam combined valve capable of locally reducing stress - Google Patents
High-pressure main steam combined valve capable of locally reducing stress Download PDFInfo
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- CN216382738U CN216382738U CN202122744269.9U CN202122744269U CN216382738U CN 216382738 U CN216382738 U CN 216382738U CN 202122744269 U CN202122744269 U CN 202122744269U CN 216382738 U CN216382738 U CN 216382738U
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Abstract
The utility model discloses a high-pressure main steam combined valve capable of locally reducing stress, which comprises: the valve comprises a valve body (1), wherein at least one front valve drainage hole (11) is formed in the valve body (1), and the front valve drainage hole (11) is connected with the valve body (1) through a transition round edge (12); the steam valve is characterized in that the valve body (1) is of an integrally formed structure, the valve body (1) comprises a regulating valve body (2) and a main steam valve body (3) communicated with the regulating valve body, a steam inlet pipe (21) and a steam outlet pipe (31) are respectively fixed on the side surfaces of the regulating valve body (2) and the main steam valve body (3), and a front drain hole (11) of the valve is formed in the side surface wall of the regulating valve body (2); the side wall of the main steam valve body (3) is provided with a post-valve drainage hole (13), and the valve body (1) is also provided with at least one steam leakage drainage hole (14). The utility model has the advantage of reducing the local stress concentration of the drain hole of the valve body.
Description
Technical Field
The utility model relates to the field of power station valves, in particular to a high-pressure main steam combined valve capable of locally reducing stress.
Background
The steam turbine is the main equipment of modern thermal power factory, and high pressure main steam combination valve is the important component of steam turbine, once this valve takes place stress concentration and then produces the crackle, can influence the economic benefits of power plant to probably bring serious potential safety hazard.
A steam turbine of a certain power plant adopts a D10 standard type steam turbine produced by GE company, a high-pressure main steam combination valve of the steam turbine has serious cracks at a drain hole after long-term operation, and the structural design of the drain hole of the high-pressure main steam combination valve is unreasonable through analysis, so that the steam turbine is an important reason for stress concentration: the transition between the drain hole and the valve body is provided with edges and corners, which easily causes stress concentration.
In patent CN201320627761.0, a fracturing pump hydraulic end valve case through tufftride is disclosed, including fracturing pump hydraulic end valve case, fracturing pump hydraulic end valve case includes single cylinder combination pump valve case, triplex pump valve case, five jar pump valve cases, 3+2 combination pump valve case, tufftride is carried out to the inner chamber of fracturing pump hydraulic end valve case, for the nitride layer, the nitride layer is with the low temperature nitrocarburizing layer that the nitridation is given first place to, when the nitrogen atom infiltration of steel, a small amount of carbon atom infiltration in addition. After the tufftriding treatment, the utility model eliminates the local stress concentration of the inner surface of the high-pressure cavity of the valve box, can not generate the local damage phenomenon caused by the stress concentration, improves the hardness of the inner surface, keeps the strength and toughness to ensure that the valve box is resistant to scouring and abrasion, is not easy to generate the crack phenomenon under the action of alternating load, can improve the corrosion resistance of the inner surface by the tufftriding layer, is suitable for acidizing and fracturing or fracturing with corrosive fracturing fluid, improves the overall strength performance of the valve box, prolongs the service life, reduces the production cost, reduces the potential safety hazard in the treatment, has simple process and strong practicability, but can not prevent the cracks around the drain hole.
In patent CN201510229229.7, a valve body optimization design method is disclosed, which establishes a three-dimensional geometric model by a parametric method, facilitates optimization design, and greatly shortens design modification time. By means of the established stress evaluation criterion, various stresses with different failures are considered, the stresses are evaluated by adopting a plurality of evaluation conditions, and whether the structural strength of the valve body meets the safety requirement or not can be comprehensively and comprehensively evaluated. Meanwhile, the economy of the structure is evaluated through a stress result, the contribution of different types of stress to the structural strength is fully considered by the economy evaluation standard, and the difference between the design and the reality is considered. When the structure of the valve body meets both safety evaluation and economic evaluation, the safety of the valve can be ensured, materials can be reduced to the maximum extent, and the bearing potential of the structure can be fully exerted, so that the weight of the valve body is reduced, the materials are saved, the cost is reduced, the designed structure is more reasonable and more economic, but the patent does not disclose an optimization scheme of a hydrophobic hole.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a high-pressure main steam combined valve with locally reduced stress, the position of a drain hole is optimally designed in order to eliminate the potential safety hazard of the high-pressure main steam combined valve, the maximum stress of the position of the drain hole of the high-pressure main steam combined valve after design and modification is lower than that before design and modification, the stress distribution on the surface is more uniform, the full-period safe operation of the high-pressure main steam combined valve is ensured, and the throttling loss of the high-pressure main steam combined valve can reach the advanced level of the domestic in-plant unit through the structure optimization and modification.
The purpose of the utility model is realized by the following technical scheme:
a locally reduced stress high pressure main steam combined valve comprising:
the valve body is provided with at least one front drain hole, and the front drain hole is connected with the valve body through a transition round edge.
Furthermore, the valve body is of an integrally formed structure, the valve body comprises a regulating valve body and a main steam valve body communicated with the regulating valve body, a steam inlet pipe and a steam outlet pipe are respectively fixed on the side surfaces of the regulating valve body and the main steam valve body, and a front drain hole of the valve is formed in the side surface wall of the regulating valve body; the side wall of the main steam valve body is provided with a drain hole after the valve, and the valve body is also provided with at least one steam leakage drain hole.
Furthermore, the front drain hole, the rear drain hole and the gate rod steam leakage drain hole are connected with the valve body through transition round edges.
Furthermore, the rear drain hole and the door rod steam leakage drain hole are arranged on the main steam valve body, and the front drain hole, the rear drain hole and the door rod steam leakage drain hole are positioned on the longitudinal section line of the valve body;
furthermore, the radius of the transition round edge is 1-5 mm;
furthermore, the lower side end of the main steam valve body is provided with a conical inclined surface, and the steam leakage and drainage hole of the door rod is positioned on the conical inclined surface.
The utility model has the beneficial effects that:
according to the high-pressure main steam combination valve capable of locally reducing stress, the transition round edge is designed on the drain hole, when the radius of the transition round edge is 1mm, 5mm and 15mm, the maximum stress is 55Mpa, 40Mpa and 35Mpa respectively, and the radius of the transition round edge of the drain hole is designed to be 1-5 mm in a reasonable interval by combining the requirements of the design wall thickness and allowable stress of materials.
Drawings
FIG. 1 is an elevation view of a high pressure main steam combination valve with localized stress reduction;
fig. 2 is a top view of the high pressure main steam combination valve inclined at 45 °.
In the figure, 1-valve body, 11-front drain hole of valve, 12-transition round edge, 13-rear drain hole of valve, 14-steam leakage drain hole of door rod, 2-regulating valve body, 21-steam inlet pipe, 3-main steam valve body and 31-steam outlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In one embodiment, as shown in fig. 1 to 2, a high-pressure main steam combination valve for reducing stress locally includes: the valve comprises a valve body 1, wherein at least one front drain hole 11 is formed in the valve body 1, and the front drain hole 11 is connected with the valve body 1 through a transition round edge 12.
The utility model is further configured to: further, the valve body 1 is of an integrally formed structure, the valve body 1 comprises a regulating valve body 2 and a main steam valve body 3 communicated with the regulating valve body, a steam inlet pipe 21 and a steam outlet pipe 31 are respectively fixed on the side surfaces of the regulating valve body 2 and the main steam valve body 3, and the front drain hole 11 is formed in the side surface wall of the regulating valve body 2; the side wall of the main steam valve body 3 is provided with a post-valve drainage hole 13, and the valve body 1 is also provided with at least one steam leakage drainage hole 14.
The utility model is further configured to: the front drain hole 11, the rear drain hole 13 and the gate bar steam leakage drain hole 14 are connected with the valve body 1 through the transition round edge 12.
The utility model is further configured to: the rear valve drain hole 13 and the door lever steam leakage drain hole 14 are arranged on the main steam valve body 3, and the front valve drain hole 11, the rear valve drain hole 13 and the door lever steam leakage drain hole 14 are positioned on the longitudinal section line of the valve body 1;
the utility model is further configured to: the radius of the transition circular edge 12 is 1 mm.
The utility model is further configured to: the lower side end of the main steam valve body 3 is provided with a conical inclined surface, and the steam leakage drain hole 14 of the valve rod is positioned on the conical inclined surface.
The second embodiment and the present embodiment are different from the first embodiment in that:
the radius of the transition circular edge 12 is 3 mm.
The third embodiment and the differences between the first embodiment are as follows:
the radius of the transition round edge 12 is 5mm
The specific values of the radii of the transition circular edges of the hydrophobic pores in the above three embodiments are obtained by a stress analysis method, which includes the steps of:
firstly, carrying out strength measurement and calculation analysis on the valve body 1 before and after transformation, and simulating to obtain the stress distribution and the stress magnitude of the main steam valve body 1 under the stable operation condition;
step two, carrying out grid division on the valve body 1;
step three, establishing a stress field mathematical model;
measuring and calculating the synthetic action stress of the valve body 1, and calculating the synthetic stress by taking the comprehensive action of the temperature and the internal pressure into consideration;
and fifthly, obtaining an equivalent stress comprehensive effect stress cloud picture of the valve body 1.
According to the scheme, stress distribution conditions are calculated by designing different transition circles of the hydrophobic holes, a local structural form of the valve is optimized, when a transition circular edge 12 is 1mm, 5mm and 15mm, equivalent stress comprehensive effective stress cloud charts of three hydrophobic holes can be seen, compared with a hydrophobic hole without the transition circular edge, the stress distribution near the hydrophobic hole is obviously reduced, the stress value of most regions is below 20MPa, along with the increase of the radius of the transition circular edge, the stress distribution near the hydrophobic hole is gradually reduced, the maximum stress values are respectively 55MPa, 40MPa and 35MPa, the scheme can be seen, the stress can be obviously reduced by reducing size mutation near the hydrophobic hole, when the radius of the transition circle is 5mm and 15mm, the maximum stress value is not greatly different, and therefore the radius of the transition circle is 1-5 mm.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention are usually placed in when used, or orientations or positional relationships that are usually understood by those skilled in the art, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or the elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Claims (6)
1. A locally reduced stress high pressure main steam combination valve, comprising:
the valve body (1), the last hydrophobic hole (11) before having seted up at least one valve of valve body (1), preceding hydrophobic hole (11) of valve is connected through transition round edge (12) with valve body (1).
2. A locally reduced pressure main steam combination valve as claimed in claim 1, wherein: the steam valve is characterized in that the valve body (1) is of an integrally formed structure, the valve body (1) comprises a regulating valve body (2) and a main steam valve body (3) communicated with the regulating valve body, a steam inlet pipe (21) and a steam outlet pipe (31) are respectively fixed on the side surfaces of the regulating valve body (2) and the main steam valve body (3), and a front drain hole (11) of the valve is formed in the side surface wall of the regulating valve body (2); the side wall of the main steam valve body (3) is provided with a post-valve drainage hole (13), and the valve body (1) is also provided with at least one steam leakage drainage hole (14).
3. A locally reduced pressure main steam combination valve as claimed in claim 2, wherein: the front drain hole (11), the rear drain hole (13) and the gate rod steam leakage drain hole (14) are connected with the valve body (1) through transition round edges (12).
4. A locally reduced pressure main steam combination valve as claimed in claim 3, wherein: the rear valve drain hole (13) and the door rod steam leakage drain hole (14) are arranged on the main steam valve body (3), and the front valve drain hole (11), the rear valve drain hole (13) and the door rod steam leakage drain hole (14) are located on the longitudinal section line of the valve body (1).
5. A locally reduced pressure main steam combination valve as claimed in claim 1, wherein: the radius of the transition round edge (12) is 1-5 mm.
6. A locally reduced pressure main steam combination valve as claimed in claim 2, wherein: the lower side end of the main steam valve body (3) is provided with a conical inclined surface, and the steam leakage drainage hole (14) of the door rod is positioned on the conical inclined surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122744269.9U CN216382738U (en) | 2021-11-10 | 2021-11-10 | High-pressure main steam combined valve capable of locally reducing stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122744269.9U CN216382738U (en) | 2021-11-10 | 2021-11-10 | High-pressure main steam combined valve capable of locally reducing stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216382738U true CN216382738U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122744269.9U Active CN216382738U (en) | 2021-11-10 | 2021-11-10 | High-pressure main steam combined valve capable of locally reducing stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216382738U (en) |
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2021
- 2021-11-10 CN CN202122744269.9U patent/CN216382738U/en active Active
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