Double eccentric floating seal eccentric v-ball valve

Abstract

The utility model discloses a kind of double eccentric floating seal eccentric V-type ball valve, it is related to valve field, it includes valve body, valve seat, valve core, valve rod being rotatably installed in valve body and core shaft being rotatably installed in valve body, the valve core one end is linked with the valve rod connection and other end is rotatably connected with the core shaft, the valve core both ends are equipped with installation groove, the installation groove is equipped with concentric block and eccentric block according to situation and chooses one installation;The eccentric block is respectively matched with valve rod and core shaft sleeve fit. The utility model has the advantages of convenient processing, high machining accuracy, reliable working.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to a double eccentric floating seal eccentric V-type ball valve. Background Technology

[0002] In the existing technology, the eccentric V-type ball valve is generally processed by machining eccentric holes at both ends of the valve core before installation. However, the machining of the valve core with eccentric holes is very difficult. For example, grinding the surface of the valve core requires specific tooling fixtures, which is time-consuming, labor-intensive, and costly. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a double eccentric floating seal eccentric V-type ball valve with a simple structure and convenient installation.

[0004] The technical solution adopted in this utility model is as follows: a double eccentric floating seal eccentric V-type ball valve, which includes a valve body, a valve seat, a valve core, a valve stem rotatably installed in the valve body, and a spindle rotatably installed in the valve body. One end of the valve core is linked to the valve stem and the other end is rotatably connected to the spindle. The valve core has mounting grooves at both ends. The mounting grooves are provided with concentric blocks and eccentric blocks that can be installed selectively according to the situation. The eccentric blocks are respectively fitted with the valve stem and the spindle.

[0005] Both the concentric block and the eccentric block are square blocks, and the mounting grooves are adapted to the concentric block and the eccentric block respectively.

[0006] The valve stem and the eccentric block are engaged.

[0007] The concentric block is used for positioning when machining the valve core, and the eccentric block is used for daily valve operation after replacing the concentric block.

[0008] The valve seat includes a hard-seal valve seat that contacts the valve core. The valve body is provided with a pressure ring for pressing the hard-seal valve seat, and an elastic element is provided between the pressure ring and the hard-seal valve seat to abut against each other.

[0009] The valve seat also includes a soft-seal valve seat, the inner ring of which is provided with an embedded soft-seal ring that contacts the valve core.

[0010] The valve body has a positioning ring installed at the rear end of the soft-seal valve seat, and the positioning ring and the valve body are threaded together.

[0011] The hard-seal valve seat, soft-seal valve seat, pressure ring, and inner wall of the valve body are all fitted with a sealing sliding fit.

[0012] The inner wall of the valve body is provided with a limiting step, and the outer ring of the hard-seal valve seat is provided with an annular boss corresponding to the limiting step. The valve body adopts a double eccentric structure. The beneficial effects of this utility model are: This technical solution achieves the overall eccentric effect of the valve by cooperating with the eccentric block and the valve core. This eccentric method can use conventional standard valve stems and mandrels to achieve the eccentric effect. In addition, when processing the valve core, replacing the eccentric block with a concentric block can adapt to the same specification of universal grinding ball tooling, which can ensure the roundness of the valve core. It has the advantages of convenient processing, high processing accuracy, and good working reliability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the double eccentric floating seal eccentric V-type ball valve according to an embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure when the eccentric block is installed on the valve core.

[0015] Figure 3 This is a schematic diagram of the structure when the concentric blocks are installed on the valve core.

[0016] Figure 4 This is a cross-sectional view of a double eccentric floating seal eccentric V-type ball valve.

[0017] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle. Detailed Implementation

[0018] The embodiments of this utility model will be further described below with reference to the accompanying drawings: As shown in the figure, a double-eccentric floating seal eccentric V-type ball valve includes a valve body 1, a valve seat, a valve core 2, a valve stem 3 rotatably installed in the valve body 1, and a spindle 4 rotatably installed in the valve body 1. One end of the valve core 2 is linked to the valve stem 3, and the other end is rotatably connected to the spindle 4. The valve core 2 has mounting grooves 5 at both ends, and concentric blocks 6 and eccentric blocks 7 are installed in the mounting grooves 5, which can be installed selectively depending on the situation. The eccentric blocks 7 are respectively fitted with the valve stem 3 and the spindle 4. This technical solution achieves the overall eccentric effect of the valve through the cooperation of the eccentric blocks and the valve core. This eccentric method can use conventional standard valve stems and spindles to achieve the eccentric effect. In addition, when processing the valve core, replacing the eccentric blocks with concentric blocks can adapt to the same specification of universal grinding ball tooling, which can ensure the roundness of the valve core. It has the advantages of convenient processing, high processing accuracy, and good working reliability.

[0019] Both the concentric block 6 and the eccentric block 7 are square blocks, and the mounting groove 5 is adapted to the concentric block 6 and the eccentric block 7 respectively; the valve stem 3 and the eccentric block 7 are meshed, the valve stem end is provided with teeth, and the eccentric block is also provided with teeth. The two mesh with each other to achieve linkage connection, or a keyway fit can be used.

[0020] The concentric block 6 is used for positioning when machining the valve core 2. The eccentric block 7 replaces the concentric block 6 and is used for the daily operation of the valve. The concentric block and the eccentric block can be replaced as needed.

[0021] The valve seat includes a hard-seal valve seat 8 that contacts the valve core 2. The valve body 1 is provided with a pressure ring 9 for pressing the hard-seal valve seat 8. An elastic element 10 is provided between the pressure ring 9 and the hard-seal valve seat 8 to abut against each other. The elastic element is a spring, which provides an elastic preload force for the hard-seal valve seat to move towards the valve core.

[0022] The valve seat also includes a soft-seal valve seat 11. The inner ring of the soft-seal valve seat 11 is provided with an embedded soft-seal ring 12 that contacts the valve core 2. The soft seal and hard seal work together to achieve the advantage of good sealing effect.

[0023] A positioning ring 13 is installed at the rear end of the soft-seal valve seat 11 on the valve body 1. The positioning ring 13 and the valve body 1 are threaded together. The positioning ring determines the installation position through the thread. Then, the soft-seal valve seat contacts the positioning ring to achieve the installation and positioning of the soft-seal valve seat. The position of the positioning ring can be adjusted according to the actual situation.

[0024] The hard-seal valve seat 8, soft-seal valve seat 11, pressure ring 9, and inner wall surface of valve body 1 are all sealed by sliding fit. The sliding seal is achieved by setting a sealing ring between the hard-seal valve seat 8, soft-seal valve seat 11, pressure ring 9, and inner wall surface of valve body 1.

[0025] The inner wall of the valve body 1 is provided with a limiting step 14, and the outer ring of the hard-seal valve seat 8 is provided with an annular boss 15 corresponding to the limiting step 14. After the annular boss contacts the limiting step, it limits the extreme movement distance of the valve seat and prevents the valve seat from excessively dislodging. The valve body 1 adopts a double eccentric structure, which improves the sealing performance when closed. When slightly opened, the valve seat and the ball core separate, and there will be no friction caused by geometric interference due to eccentricity. The double eccentric structure of the valve body is existing technology and will not be described in detail here. In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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 on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] 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. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modifications that utilize the inventive concept will be included within the scope of protection of this patent.

Claims

1. A double eccentric floating seal eccentric V-type ball valve, characterized in that: It includes a valve body (1), a valve seat, a valve core (2), a valve stem (3) rotatably installed in the valve body (1), and a spindle (4) rotatably installed in the valve body (1). One end of the valve core (2) is linked to the valve stem (3) and the other end is rotatably connected to the spindle (4). The valve core (2) has mounting grooves (5) at both ends. The mounting grooves (5) are provided with concentric blocks (6) and eccentric blocks (7) that can be installed according to the situation. The eccentric blocks (7) are respectively fitted with the valve stem (3) and the spindle (4).

2. The double eccentric floating seal eccentric V-type ball valve according to claim 1, characterized in that: Both the concentric block (6) and the eccentric block (7) are square blocks, and the mounting groove (5) is adapted to the concentric block (6) and the eccentric block (7) respectively.

3. The double eccentric floating seal eccentric V-type ball valve according to claim 1, characterized in that: The valve stem (3) and the eccentric block (7) are engaged.

4. The double eccentric floating seal eccentric V-type ball valve according to claim 1, characterized in that: The concentric block (6) is used for positioning when machining the valve core (2), and the eccentric block (7) is used for daily valve operation after replacing the concentric block (6).

5. The double eccentric floating seal eccentric V-type ball valve according to claim 1, characterized in that: The valve seat includes a hard-seal valve seat (8) that contacts the valve core (2). The valve body (1) is provided with a pressure ring (9) for pressing the hard-seal valve seat (8). An elastic element (10) is provided between the pressure ring (9) and the hard-seal valve seat (8) to abut against each other.

6. The double eccentric floating seal eccentric V-type ball valve according to claim 5, characterized in that: The valve seat also includes a soft-seal valve seat (11), the inner ring of which is provided with an embedded soft-seal ring (12) that contacts the valve core (2).

7. The double eccentric floating seal eccentric V-type ball valve according to claim 6, characterized in that: The valve body (1) has a positioning ring (13) installed at the rear end of the soft-seal valve seat (11), and the positioning ring (13) and the valve body (1) are threaded together.

8. The double eccentric floating seal eccentric V-type ball valve according to claim 6, characterized in that: The hard-seal valve seat (8) and the soft-seal valve seat (11), the pressure ring (9) and the inner wall of the valve body (1) are all sealed and slidingly fitted.

9. The double eccentric floating seal eccentric V-type ball valve according to claim 5, characterized in that: The inner wall of the valve body (1) is provided with a limiting step (14), and the outer ring of the hard-seal valve seat (8) is provided with an annular boss (15) corresponding to the limiting step (14).

10. The double eccentric floating seal eccentric V-type ball valve according to claim 1, characterized in that: The valve body (1) adopts a double eccentric structure.

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