A valve seat for facilitating assembly

Abstract

The utility model provides a kind of valve seat of convenient assembly, including seat body, inner cavity is arranged in seat body, seat body top surface is equipped with valve rod mounting hole, the left and right ends of seat body are equipped with a pipe connector mounting hole respectively, the axis of two pipe connector mounting holes passes the center of inner cavity;Pipe connector mounting hole includes straight light hole portion, threaded hole portion and limit hole portion sequentially arranged from outside to inside, the aperture of straight light hole portion is greater than the major diameter of threaded hole portion, sealing groove is set in straight light hole portion hole wall, the aperture of limit hole portion is less than the minor diameter of threaded hole portion.The utility model, limit hole portion is positioned to the length of pipe connector into the valve seat, realize the quick symmetrical installation of two pipe connectors of left, right end, without repeated adjustment, it can make the same deformation of two pipe connectors and ball valve core between sealing structure, improve the service life of sealing structure and ball valve core.

Description

Technical Field

[0001] This utility model belongs to the field of valve manufacturing, and in particular relates to a valve seat that is easy to assemble. Background Technology

[0002] The ball valve is an assembly consisting of a valve seat, a ball valve core, and two pipe fittings. The valve seat has an internal cavity in which the ball valve is placed. The ball valve has a horizontally continuous medium flow channel. The two pipe fittings are symmetrically installed on the left and right ends of the valve seat, with their center holes coaxial and communicating with the valve seat's internal cavity. In use, the ball valve is installed in the piping system via these two pipe fittings. The ball valve core has a corresponding valve stem that extends out of the valve seat. Rotating the valve stem causes the ball valve core to rotate, thus changing the positional relationship between the medium flow channel and the center holes of the pipe fittings, thereby opening or closing the ball valve.

[0003] Currently, the pipe fittings and valve seats of ball valves are primarily threaded connections. To prevent leakage after the ball valve is closed, and to ensure its shut-off effect, a sealing structure must be installed between the pipe fittings and the ball valve core. Because both pipe fittings and valve seats are threaded connections, it is difficult to ensure symmetry between them during assembly. This leads to differences in the deformation and sealing of the sealing structure between the two fittings and the ball valve core, often resulting in a tight seal at one end and a loose seal at the other. Over time, this affects the service life of the sealing structure. Currently, solving this problem requires repeated adjustments to the screw-in length of the two pipe fittings based on experience, which is inconvenient for assembly. Utility Model Content

[0004] In view of this, the present invention aims to provide a valve seat that is easy to assemble, so as to facilitate the assembly of the valve seat and pipe fittings.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A valve seat that is easy to assemble includes a seat body, an inner cavity for installing a ball valve core is provided in the seat body, a valve stem mounting hole communicating with the inner cavity is opened on the top surface of the seat body, and a pipe fitting mounting hole is opened at the left and right ends of the seat body respectively. The two pipe fitting mounting holes are coaxial and communicate with the inner cavity, and the axis of the two pipe fitting mounting holes passes through the center of the inner cavity.

[0007] The mounting hole for the pipe fitting includes a straight hole, a threaded hole, and a limiting hole arranged sequentially from the outside to the inside. The diameter of the straight hole is larger than the major diameter of the threaded hole. A sealing groove is formed in the wall of the straight hole. The diameter of the limiting hole is smaller than the minor diameter of the threaded hole.

[0008] Furthermore, the limiting hole is a tapered hole, with one end of the tapered hole near the threaded hole being a large end and the other end being a small end.

[0009] Furthermore, the limiting hole is a tapered hole with a apex angle of 90° to 120°.

[0010] Furthermore, a transition hole is provided between the limiting hole and the threaded hole, and the diameter of the transition hole is larger than the major diameter of the threaded hole.

[0011] Furthermore, the limiting hole is positioned close to the inner cavity.

[0012] Furthermore, the sealing groove is a square groove provided for a corresponding O-ring seal.

[0013] Compared with the prior art, the valve seat of this utility model that is easy to assemble has the following advantages:

[0014] (1) In this utility model, the pipe fitting mounting hole on the valve seat is provided with a straight hole, a threaded hole and a limiting hole. The diameter of the straight hole is greater than the major diameter of the threaded hole and the diameter of the limiting hole. A sealing groove for installing a sealing ring is opened in the straight hole so that the sealing ring can avoid the threaded connection structure between the pipe fitting and the valve seat, ensuring that the pipe fitting and the valve seat can be quickly assembled.

[0015] (2) In this utility model, the limiting hole limits the length of the pipe fitting screwed into the valve seat, so as to realize the quick and symmetrical installation of the two pipe fittings on the left and right ends. Without repeated adjustments, the sealing structure between the two pipe fittings and the ball valve core can produce the same deformation, thereby improving the service life of the sealing structure and the ball valve core.

[0016] (3) In this utility model, the limiting hole is a tapered hole, which, together with the corresponding tapered surface structure on the pipe fitting, forms a wedge-shaped sealing structure, further improving the sealing effect between the pipe fitting and the valve seat. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0018] Figure 1 This is a schematic diagram of a valve seat structure that is easy to assemble, as described in an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the installation of a valve seat and pipe fitting that are easy to assemble, as described in an embodiment of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1-Body; 2-Inner cavity; 3-Pipe fitting mounting hole; 31-Straight hole; 32-Sealing groove; 33-Threaded hole; 34-Limiting hole; 35-Transition hole; 4-O-ring seal; 5-Pipe fitting; 6-Valve stem mounting hole; 7-Sealing structure; 8-Ball valve core. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figure 1As shown, a valve seat that is easy to assemble includes a seat body 1, which is a metal part. The seat body 1 has an internal cavity 2 for mounting a ball valve core. A valve stem mounting hole 6, communicating with the internal cavity 2, is opened on the top surface of the seat body 1. Threaded holes for mounting a valve cover are also opened around the valve stem mounting hole 6 on the top surface of the seat body 1. After the valve core and valve stem are assembled, the valve cover is installed to protect the inside of the ball valve. A pipe fitting mounting hole 3 is opened at the left and right ends of the seat body 1, corresponding to pipe fittings. The two pipe fitting mounting holes 3 are coaxial and symmetrically arranged, both communicating with the internal cavity 2, and their axes pass through the center of the internal cavity 2.

[0027] Each pipe fitting mounting hole 3 includes, from the outside to the inside, a straight-through hole 31, a threaded hole 33, a transition hole 35, and a limiting hole 34. The straight-through hole 31 has a sealing groove 32 on its wall, which is a square groove structure corresponding to the O-ring seal. The limiting hole 34 is a tapered hole structure with a apex angle of 90° to 120°. The end of this tapered hole near the threaded hole 33 is the larger end, and the other end, which is close to the inner cavity 2, is the smaller end. The diameters of the straight-through hole 31, the threaded hole 33, and the limiting hole 34 are as follows: the diameter of the straight-through hole 31 is larger than the major diameter of the threaded hole 33; the diameter of the larger end of the limiting hole 34 is smaller than the minor diameter of the threaded hole 33; and the diameter of the transition hole 35 is larger than the major diameter of the threaded hole 33.

[0028] The mounting hole for the pipe fitting adopts the above structure, which facilitates the machining of the threaded hole 33, and also allows for easier assembly of the pipe fitting and valve seat, such as... Figure 2 As shown, the O-ring 4 allows the threaded connection between the pipe fitting 5 and the valve seat to be avoided, ensuring quick assembly of the pipe fitting 5 and the valve seat. Furthermore, during assembly, the outer surface of the pipe fitting 5 has a conical structure at the corresponding limiting hole 34 near its insertion end (front end). When the pipe fitting 5 is screwed into the conical surface and the limiting hole 34, a limiting structure is formed, restricting the length of the pipe fitting 5 screwed into the seat body 1. This ensures that the two pipe fittings are screwed into the seat body 1 to the same length, resulting in consistent deformation of the sealing structure 7 between the pipe fitting 5 and the ball valve core 8. This prevents uneven sealing on one side and uneven sealing on the other, ensuring the same deformation and sealing effect on both sides, thus guaranteeing the service life of the sealing structure 7 and the ball valve core 8. The pipe fitting 5, when screwed into the conical surface and the limiting hole 34, forms a wedge-shaped sealing structure, further improving the sealing effect between the pipe fitting 5 and the valve seat.

[0029] The valve seat structure described in this utility model enables rapid assembly between the pipe fitting and the valve seat, and ensures a sealing effect at the connection point.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A valve seat that is easy to assemble, characterized in that: The device includes a seat body (1), an inner cavity (2) for installing a ball valve core is provided inside the seat body (1), a valve stem mounting hole (6) communicating with the inner cavity (2) is opened on the top surface of the seat body (1), and a pipe fitting mounting hole (3) is opened at the left and right ends of the seat body (1), the two pipe fitting mounting holes (3) are coaxial and both communicate with the inner cavity (2), and the axis of the two pipe fitting mounting holes (3) passes through the center of the inner cavity (2); The pipe fitting mounting hole (3) includes a straight hole (31), a threaded hole (33) and a limiting hole (34) arranged sequentially from the outside to the inside. The diameter of the straight hole (31) is larger than the major diameter of the threaded hole (33). A sealing groove (32) is opened in the hole wall of the straight hole (31). The diameter of the limiting hole (34) is smaller than the minor diameter of the threaded hole (33).

2. The valve seat for easy assembly according to claim 1, characterized in that: The limiting hole (34) is a tapered hole, with one end of the tapered hole near the threaded hole (33) being the larger end and the other end being the smaller end.

3. A valve seat for easy assembly according to claim 2, characterized in that: The limiting hole (34) is a tapered hole with a apex angle of 90° to 120°.

4. A valve seat for easy assembly according to claim 1, characterized in that: A transition hole (35) is provided between the limiting hole (34) and the threaded hole (33), and the diameter of the transition hole (35) is larger than the major diameter of the threaded hole (33).

5. A valve seat for easy assembly according to claim 1, characterized in that: The limiting hole (34) is located close to the inner cavity (2).

6. A valve seat for easy assembly according to claim 1, characterized in that: The sealing groove (32) is a square groove provided for the corresponding O-ring seal.

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