Eccentric rotary valve capable of adjusting rated CV

Abstract

The utility model discloses an eccentric rotary valve capable of adjusting rated CV, which relates to the technical field of eccentric rotary regulating valves, and comprises a clack ball, an eccentric rotary valve body and a valve rod, and further comprises a regulating component arranged in the eccentric rotary valve body and used for carrying out multi-gear regulation on the rated CV; the adjusting assembly comprises a valve body valve seat, the valve body valve seat is pressed and fixed into the eccentric rotary valve body through a valve seat pressing ring, a groove is formed in the inner wall of the valve body valve seat, two sets of flow adjusting plates are embedded into the groove, and semicircular holes are formed in the middles of the flow adjusting plates. Semicircular holes in the two sets of flow adjusting plates are controlled to be assembled on a valve seat of the valve body in a staggered mode, the flow adjusting plates are in a regular polygon shape, the flow coefficient can be controlled in a multi-gear mode without changing the size of the valve body, and multi-gear selection of rated CV is achieved to adapt to different working condition requirements.

Description

Technical Field

[0001] This utility model relates to the field of eccentric rotary regulating valve technology, specifically an eccentric rotary valve with adjustable rated CV. Background Technology

[0002] The eccentric rotary valve, also known as the cam flexure valve, showcases the technological level of the 1980s. Its working principle is based on the design of an eccentrically rotating sector ball valve. The opening and closing function is achieved through the ingenious tangency between the eccentric ball crown and the valve seat. When the valve is opened, the ball core separates from the valve seat; during the closing process, the ball core gradually contacts the valve seat, thereby generating a clamping force to ensure the valve is tightly closed.

[0003] Currently, eccentric rotary control valves are often used in low-flow conditions where the valve body size cannot be reduced. Therefore, the inner diameter of the flow channel needs to be reduced to decrease the rated CV in order to keep the adjustment of the opening within a reasonable range. This is usually achieved by replacing valve internals of different sizes, which increases manufacturing costs. Moreover, valves of the same size can generally only provide 2 to 3 rated CV levels. Furthermore, due to space constraints, it is usually difficult to design a structure that reduces the rated CV under very low flow conditions. There is an urgent need in the market for eccentric rotary control valves that can provide multiple rated CV levels for easy selection. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an eccentric rotary valve with adjustable rated CV.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable rated CV eccentric rotary valve, comprising a valve ball, an eccentric rotary valve body, and a valve stem, and further comprising:

[0006] An adjustment component, located inside the eccentric rotary valve body, is used to adjust the rated CV in multiple levels;

[0007] The regulating component includes a valve body and a valve seat. The valve body and valve seat are pressed and fixed inside the eccentric rotary valve body by a valve seat pressure ring. The inner wall of the valve body and valve seat has a groove, and two sets of flow regulating plates are embedded inside the groove. The flow regulating plates have a semi-circular hole in the middle.

[0008] As described above, the valve ball is disposed inside the eccentric rotary valve body, and the valve stem controls the rotation of the valve ball through a rectangular spline.

[0009] As mentioned above, the outer periphery of the flow regulating plate is a regular polygon.

[0010] As described above, the valve body seat contacts the outer surface of the valve ball, and the valve seat pressure ring abuts against one side of one of the flow regulating plates.

[0011] As mentioned above, the groove inside the valve body and valve seat is adapted to the flow regulating plate.

[0012] The two sets of flow regulating plates mentioned above are in contact with each other.

[0013] Compared with the prior art, this adjustable rated CV eccentric rotary valve has the following advantages:

[0014] I. This utility model controls the semi-circular holes on two sets of flow regulating plates to be staggered on the valve body and valve seat. Since the flow regulating plates are regular polygons, the flow coefficient can be controlled in multiple levels without changing the valve body size, so as to realize multiple selection of rated CV to adapt to different working conditions.

[0015] Second, this utility model does not require replacing the internal parts of the valve. It only requires changing the installation angle of the flow regulating plate to select different rated CVs, thereby achieving the universality of the parts and reducing manufacturing costs.

[0016] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main components of this utility model;

[0018] Figure 2 This is a schematic diagram of the disassembly structure of the flow regulating plate of this utility model;

[0019] Figure 3 This is a schematic diagram of the multi-stage rated CV of this utility model.

[0020] In the diagram: 1. Valve seat pressure ring; 2. Flow regulating plate; 3. Valve body and valve seat; 4. Ball valve; 5. Eccentric rotary valve body; 6. Valve stem. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-3 As shown, this utility model provides an adjustable rated CV eccentric rotary valve, including a ball valve 4, an eccentric rotary valve body 5, and a valve stem 6, and further including:

[0023] An adjustment component, located inside the eccentric rotary valve body 5, is used to adjust the rated CV in multiple levels.

[0024] The regulating component includes a valve body and valve seat 3. The valve body and valve seat 3 are pressed and fixed inside the eccentric rotary valve body 5 by a valve seat pressure ring 1. The inner wall of the valve body and valve seat 3 is provided with a groove, and two sets of flow regulating plates 2 are embedded inside the groove. A semi-circular hole is provided in the middle of the flow regulating plate 2.

[0025] By setting two sets of flow regulating plates 2, controlling the staggered arrangement of semi-circular holes on the two sets of flow regulating plates 2, and because the flow regulating plates 2 are regular polygons, and the cooperation between the flow regulating plates 2 and the valve body and valve seat 3, the rotation of the flow regulating plates 2 is restricted, and the valve seat pressure ring 1 is used to position the flow regulating plates 2. The flow coefficient can be controlled in multiple levels without changing the valve body size, and multiple levels of rated CV can be selected to adapt to different working conditions.

[0026] like Figure 1 , 2 As shown, the outer periphery of the flow regulating plate 2 is a regular polygon, the valve ball 4 is set inside the eccentric rotary valve body 5, and the valve stem 6 controls the rotation of the valve ball 4 through a rectangular spline.

[0027] The flow regulating plate 2 is designed in the form of a regular polygon, which allows for multiple levels of adjustment. Furthermore, by changing the number of sides of the polygon, the rated CV can be adjusted.

[0028] like Figure 1 As shown, the valve body seat 3 is in contact with the outer surface of the valve ball 4, and the valve seat pressure ring 1 abuts against one side of one of the flow regulating plates 2.

[0029] The cooperation between the valve seat pressure ring 1 and the flow regulating plate 2 can prevent the flow regulating plate 2 from separating from the valve body seat 3, thereby enabling the flow regulating plate 2 to be positioned.

[0030] like Figure 1 , 2 As shown, the groove inside the valve body and valve seat 3 is adapted to the flow regulating plate 2, and the two sets of flow regulating plates 2 are in contact with each other.

[0031] Through the design of the valve body and valve seat 3, since the groove inside the valve body and valve seat 3 is adapted to the flow regulating plate 2, the rotation of the two sets of flow regulating plates 2 can be restricted, and the rated flow coefficient can be controlled.

[0032] Working principle:

[0033] Before installing the valve seat pressure ring 1, control the position of one set of flow regulating plates 2 and the semi-circular hole of another set of flow regulating plates 2, and embed the flow regulating plate 2 into the valve body seat 3. Then, use the valve seat pressure ring 1 to position the flow regulating plate 2. The flow coefficient can be controlled in multiple levels without changing the valve body size, and multiple levels of rated CV can be selected to adapt to different working conditions.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An eccentric rotary valve with adjustable rated CV, comprising a valve ball (4), an eccentric rotary valve body (5), and a valve stem (6), characterized in that, Also includes: An adjustment component, which is located inside the eccentric rotary valve body (5), is used to adjust the rated CV in multiple levels; The regulating component includes a valve body and valve seat (3), which is pressed and fixed inside the eccentric rotary valve body (5) by a valve seat pressure ring (1). The inner wall of the valve body and valve seat (3) is provided with a groove, and two sets of flow regulating plates (2) are embedded inside the groove. The flow regulating plate (2) has a semi-circular hole in the middle.

2. The eccentric rotary valve with adjustable rated CV according to claim 1, characterized in that: The valve ball (4) is located inside the eccentric rotary valve body (5), and the valve stem (6) controls the rotation of the valve ball (4) through a rectangular spline.

3. The eccentric rotary valve with adjustable rated CV according to claim 1, characterized in that: The outer periphery of the flow regulating plate (2) is a regular polygon.

4. An eccentric rotary valve with adjustable rated CV according to claim 1, characterized in that: The valve body seat (3) contacts the outer surface of the valve ball (4), and the valve seat pressure ring (1) abuts against one side of one of the flow regulating plates (2).

5. An eccentric rotary valve with adjustable rated CV according to claim 1, characterized in that: The groove inside the valve body seat (3) is adapted to the flow regulating plate (2).

6. An eccentric rotary valve with adjustable rated CV according to claim 1, characterized in that: The two sets of flow regulating plates (2) are attached together.

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