CN205350412U - Angle stroke control valve valve holder structure - Google Patents

Abstract

The utility model discloses a valve seat structure of an angular stroke regulating valve, which comprises a valve seat body. The valve seat body cooperates with the valve core and extends inwardly with a ring-shaped elastic compensation structure. The elastic compensation structure is mainly composed of a working seat part, The transition part and the base part are composed of a horizontal cross-section in the shape of a "Z"; the base part is integrated with the valve seat body, and the working seat part has a small slope corresponding to the valve core. There is a surfacing layer with a curved structure on the inclined surface, the outer contour of the surfacing layer is in line contact with the matching valve core, and the transition part serves as an elastic deformation section and is located between the base part and the work seat part. On the premise of satisfying the rigidity and fatigue resistance strength of the valve seat body, the utility model further increases the wear resistance and erosion resistance of the valve seat body in cooperation with the valve core.

Description

Seat structure of a quarter-stroke regulating valve

technical field

The utility model relates to a valve, in particular to a valve seat structure of an angular stroke regulating valve.

Background technique

The sealing structure of the seat and spool of the traditional angular stroke valve is all in contact with the steel surface and the linear surface, and has elastic elements, such as the "J" shaped seat body 1 and the elastic element 3 (see Figure 1) and " S"-shaped corrugated valve seat body 1 and elastic element 3 (see Figure 2), which makes the misalignment caused by processing or other dimensional errors be well compensated, so that the valve seat body 1 and the valve core 2 are completely The anastomoses form a good annular seal.

The elastic pressure of the elastic element 3 significantly improves the sealing effect of the valve. However, due to the large elastic deformation, the frictional resistance caused between the valve core 2 and the sealing surface of the valve seat body 1 is relatively large, which increases the switching torque of the valve. At the same time, due to structural requirements, "J" and "S" shaped elastic elements 3 are usually thinner, with relatively low strength and rigidity, and the sealing surface treatment such as surfacing welding is also limited.

The Chinese patent literature discloses a "a quarter-stroke regulating valve" (publication number: CN101649914, publication date: 2010-02-17). The invention discloses a quarter-stroke regulating valve, including a valve body, fixed in the valve body The valve seat, the valve core matched with the valve seat, the valve seat has three parts of the overall structure, namely, the base part, which is fixed on the valve body; the working seat part, which cooperates with the valve core; Between the seat part and the work seat part, the transition part is an elastic deformation section. When the valve core is in contact with the work seat part, the transition part elastically deforms, so that the work seat part and the base part have relative displacement; the base part is A ring body with a larger diameter, the working seat part is a ring body with a smaller diameter, and the transition part is a tapered tubular body, the big head end corresponds to the base part, and the small head end corresponds to the work seat part; the three parts are concentric Arrangement, the order of distribution from inside to outside in the radial direction is the working seat part, the intermediate transition part, and the base part; the cross-sectional shape of the annular body of the working seat part is a rectangle, and the corners of the rectangle and the valve core are rounded corners, rounded corners The radius adapts to the displacement of the work seat. It is suitable for working conditions of high pressure difference and high leakage level, and can adjust the full opening, and the valve core and seat will not be locked. However, due to the long-term frictional force at the annular line contact position between the valve seat and the valve core, the annular line contact position between the valve seat and the valve core is prone to wear and erosion.

Contents of the invention

The purpose of this utility model is to provide an angular stroke regulating valve that improves the rigidity and fatigue resistance of the valve seat body and increases the wear resistance and erosion resistance of the valve seat body and the valve core. Seat structure.

The technical solution adopted by the utility model is, a valve seat structure of an angular stroke regulating valve, including a valve seat body, and a ring-shaped elastic compensation structure extending inwardly from the position where the valve seat body cooperates with the valve core, and the elastic compensation structure It is mainly composed of a working seat part, a transition part and a base part, and the circumferential section is in a flat "Z" shape; the base part is integrated with the valve seat body, and the working seat part has a corresponding valve core. Small inclined surface, the small inclined surface of the working seat part has a surfacing layer with a curved surface structure, the outer contour of the surfacing layer forms a line contact with the matching valve core, and the transition part acts as an elastic deformation section, located between the base part and the Between the work seat parts.

The transition part is a tapered surface structure with a middle thickness smaller than that at both ends, and the two ends of the transition part are integrally formed with the corresponding base part and work seat part respectively.

The beneficial effects of the utility model are: the utility model further increases the wear resistance and erosion resistance of the valve seat body and the valve core on the premise of satisfying the rigidity and fatigue resistance of the valve seat body.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a structural schematic diagram of the prior art.

Fig. 2 is a schematic structural diagram of the prior art.

Meanings of codes in the figure: 1—valve seat; 2—spool; 3—elastic element.

Fig. 3 is a schematic structural view of the utility model.

Fig. 4 is an enlarged view at point A in Fig. 3 .

Meanings of codes in the figure: 4—seat body; 41—base part; 42—transition portion; 43—working seat part; 5—valve core; 6—surfacing layer.

detailed description

Referring to Fig. 3 and Fig. 4 : the utility model is a valve seat structure of an angular stroke regulating valve, including a valve seat body 4 .

The above-mentioned valve seat body 4 cooperates with the valve core 5 to extend inwardly with a ring-shaped elastic compensation structure. The elastic compensation structure is mainly composed of a working seat part 43, a transition part 42 and a base part 41. The elastic compensation structure ring The cross-section is in the shape of a horizontal "Z"; the base part 41 is integrated with the valve seat body 4, and the working seat part 43 has a small slope corresponding to the valve core 5, and the small slope is located on the inner side of the working seat part Along the position, the small inclined surface of the work seat part 43 has a curved surface structure welding surfacing layer 6, the corner of the welding surfacing layer 6 and the valve core 5 is rounded, and the radius of the fillet is adapted to the displacement of the work seat part 43, so that The outer contour of the surfacing layer 6 is in line contact with the matching valve core 5, and is sealed in a ring-shaped line contact manner. The valve core 5 selected in this embodiment is a crown spherical valve core or a crown spherical valve plate. The transition part 42 is used as an elastic deformation section and is located between the base part 41 and the working seat part 43, so that the base part 41 and the working seat part There is a relative displacement of the seat part. The transition portion 42 is a tapered structure with a thickness in the middle less than that at both ends, and the two ends of the transition portion 42 are integrally formed with the corresponding base portion 41 and the work seat portion 43 respectively. On the premise of ensuring the rigidity and fatigue resistance of the valve seat body 4, the wear and erosion resistance of the valve seat body 4 and the valve core 5 are further increased to prolong the service life.

Compared with Fig. 1 and Fig. 2, the utility model has a shorter elastic deformation section length of the valve seat body 4 and a larger cross-sectional area, and can be used in places with high pressure difference. By rationally designing the length of the elastic deformation section The length size and section size are suitable for the pressure difference requirements of different working conditions.

Compared with the structural design of the publication number: CN101649914, the utility model has a more reasonable structure of the transition part 42 of the utility model, and its strength and rigidity are relatively higher.

The above specific technical solutions are only used to illustrate the utility model, not to limit it. Although the utility model has been described in detail with reference to the above-mentioned specific technical solutions, those skilled in the art should understand that: it can still modify the above-mentioned specific technical solutions, or perform equivalent replacements to some of the technical features; and these modifications or replacements , does not make the essence of the corresponding technical solution deviate from the spirit and scope of the present utility model.

Claims (2)

1. A valve seat structure of an angular stroke regulating valve, comprising a valve seat body, characterized in that: the position of the valve seat body cooperating with the valve core extends inwardly with a ring-shaped elastic compensation structure, and the elastic compensation structure is mainly composed of a working The seat part, the transition part and the base part are composed of a horizontal cross-section in a "Z" shape; the base part is integrated with the valve seat body, and the working seat part has a small slope corresponding to the valve core. There is a surfacing layer with a curved surface structure on the small slope of the work seat part, the outer contour of the surfacing layer forms line contact with the matching valve core, and the transition part is an elastic deformation section located between the base part and the work seat part between. 2. According to claim 1, the valve seat structure of the angular stroke regulating valve is characterized in that: the transition part is a tapered surface structure whose middle thickness is smaller than the thickness of both ends respectively, and the two ends of the transition part are respectively connected with the corresponding base part and The work seat part is integrally formed.