Eccentric semi-ball valve with linear power actuating mechanism

Abstract

The utility model belongs to the technical field of valves, and particularly discloses an eccentric semi-ball valve with a linear power actuating mechanism, which comprises a valve body, a valve cover is arranged at the top of the valve body, a semi-ball valve clack and a liftable sealing valve seat are arranged in the valve body, and a valve rod is mounted at the upper end of the liftable sealing valve seat. A power executing mechanism is fixed to the upper end of the valve deck through a supporting seat, the output end of the power executing mechanism is detachably connected with the upper end of the valve rod, the detachable connecting position is exposed out of the upper portion of the valve deck, and the output end of the power executing mechanism can do vertical linear motion. After the eccentric semi-ball valve is completely opened, the valve rod is driven, so that the liftable sealing valve seat descends to abut against the outer side face of the semi-ball valve clack for sealing. The eccentric semi-ball valve is provided with the linear power executing mechanism, and lifting adjustment of the lifting sealing valve seat in the valve body can be conveniently and rapidly carried out.

Description

Technical Field

[0001] The present application belongs to the field of valve technology, and more specifically, relates to an eccentric hemispherical valve with a linear power actuator. Background Art

[0002] The eccentric hemispherical valve is a valve commonly used in fluid medium pipeline systems to cut off and open the medium in the pipeline and regulate the pipeline flow. During the use of the eccentric hemispherical valve, the seal on the hemispherical valve disc may be worn or damaged, causing the valve to leak, so the seal needs to be replaced regularly.

[0003] In the related art, a Chinese patent document with a publication number of CN219866371U discloses an eccentric hemispherical valve, which includes a valve body, a valve shaft and a hemispherical valve disc; wherein a second valve port is provided on the valve body, and a liftable sealing valve seat is arranged in the second valve port of the valve body; in order to adjust the liftable valve seat, a hand wheel and a valve stem are also arranged on the valve body, and by rotating the hand wheel, the valve stem can be driven to rotate spirally, thereby driving the liftable sealing valve seat to be lifted and lowered. Under this design, after the eccentric hemispherical valve is fully opened, the liftable sealing valve seat can be lowered to its lower end to abut and seal against the outer side of the hemispherical valve disc, thereby forming a closed pressure chamber between the valve cover at the top of the valve body and the hemispherical valve disc, and the seal on the hemispherical valve disc is removed from the opened closed pressure chamber. During the disassembly process, the eccentric hemispherical valve can still continue to work, so that the seal can be replaced online without stopping the water.

[0004] However, in the above scheme, the linear lifting motion of the liftable sealing valve seat is converted by the thread rotation motion, and the adjustment process has many disadvantages. For example, the time taken to convert the thread rotation motion into linear opening and closing is usually long, and the thread rotation process is prone to jamming. The screw is located inside the valve, and it is impossible to know whether the liftable sealing valve seat is lifted or lowered during operation. If jamming occurs, the position of the liftable sealing valve seat may be misjudged. Many disadvantages make the adjustment of the liftable sealing valve seat inconvenient and urgently need to be improved. Utility Model Content

[0005] In view of the defects or improvement needs of the prior art, the present application provides an eccentric hemispherical valve with a linear power actuator, aiming to improve the problem that the adjustment process of the current liftable sealing valve seat is relatively inconvenient.

[0006] The present application provides an eccentric hemispherical valve with a linear power actuator, which specifically includes a valve body, a valve cover is arranged on the top of the valve body, and a hemispherical valve disc and a liftable sealing valve seat are arranged in the valve body;

[0007] A valve stem is installed at the upper end of the liftable sealing valve seat, and a power actuator is fixed to the upper end of the valve cover through a support seat. The output end of the power actuator is detachably connected to the upper end of the valve stem, and the detachable connection is exposed above the valve cover. The output end of the power actuator can perform vertical linear motion to drive the valve stem after the eccentric hemispherical valve is fully opened, so that the liftable sealing valve seat is lowered to abut and seal with the outer side of the hemispherical valve disc.

[0008] Through the above technical solution conceived by the present application, compared with the prior art, after the eccentric hemispherical valve is fully opened, the valve stem is driven by the power actuator to drive the liftable sealing valve seat to move downward, so that the liftable sealing valve seat is lowered to abut against the outer side of the hemispherical valve disc to seal, which is convenient for maintenance personnel to replace the seal on the hemispherical valve disc. Since the lifting and adjusting process of the liftable sealing valve seat is quickly completed by the linear drive of the power actuator, the operation takes a short time and is not prone to jamming.

[0009] Since the detachable connection between the power actuator and the valve stem is exposed above the valve cover, it is possible to determine whether the liftable sealing valve seat is lifted or lowered in place based on the position of the connection during operation, making the adjustment process of the liftable sealing valve seat convenient, fast and very intuitive.

[0010] As a further preference, the output end of the power actuator is threadedly connected to the upper end of the valve stem.

[0011] As a further preference, the output end of the power actuator is connected to the upper end of the valve stem via a first connecting member.

[0012] As a further preference, the lower end of the valve stem is detachably connected to the liftable sealing valve seat.

[0013] As a further preference, the lower end of the valve stem is threadedly connected to the liftable sealing valve seat.

[0014] As a further preference, the lower end of the valve stem is connected to the liftable sealing valve seat via a second connecting piece.

[0015] As a further preference, a shaft sealing structure is provided between the support seat and the valve cover.

[0016] As a further preference, the support seat is detachably connected to the valve cover and / or the power actuator.

[0017] As a further preference, the support seat has a cavity for accommodating a detachable connection between the power actuator and the valve stem, and a side surface of the support seat has an inspection hole connected to the cavity.

[0018] As further preferred, the power actuator is any one of a hydraulic actuator, a pneumatic actuator, an electric actuator, and an electro-hydraulic actuator.

[0019] In general, the above technical solutions conceived by this application have the following technical advantages compared with the prior art:

[0020] 1. Since the power actuator can drive the valve stem to move up and down linearly, when it is necessary to remove the seal on the hemispherical valve disc, after the eccentric hemispherical valve is fully opened, the power actuator drives the valve stem to drive the liftable sealing valve seat to move downward, so that the liftable sealing valve seat can be lowered to abut and seal against the outer side of the hemispherical valve disc. This process is directly completed by the linear drive of the power actuator, the operation is time-saving, not prone to jamming, and the adjustment process is more convenient.

[0021] 2. Since the connection between the power actuator and the valve stem is exposed from above the valve cover, during operation, the operator can quickly determine whether the liftable sealing valve seat is lifted or lowered in place based on the position of the connection, making the adjustment process of the liftable sealing valve seat more intuitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the eccentric hemispherical valve provided in an embodiment of the present application;

[0023] Figure 2 is a schematic cross-sectional structural diagram of an eccentric hemispherical valve provided in an embodiment of the present application;

[0024] Figure 3 It is a structural schematic diagram of the valve stem, support seat and power actuator provided in the embodiment of the present application.

[0025] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0026] 1. Valve body; 2. Valve cover; 3. Hemispherical valve disc; 4. Liftable sealing valve seat; 5. Valve stem; 6. Support seat; 7. Power actuator; 8. Shaft sealing structure; 9. First connecting piece; 10. Second connecting piece. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] The embodiment of the present application discloses an eccentric hemispherical valve with a linear power actuator. Figure 1 The eccentric hemispherical valve with a linear power actuator comprises a valve body 1, a valve cover 2 is arranged on the top of the valve body 1, and a hemispherical valve disc 3 and a liftable sealing valve seat 4 are arranged in the valve body 1. Among them, a valve stem 5 is installed on the upper end of the liftable sealing valve seat 4, and a power actuator 7 is fixed to the upper end of the valve cover 2 through a support seat 6. The output end of the power actuator 7 is detachably connected to the upper end of the valve stem 5, and the detachable connection is exposed above the valve cover 2. The output end of the power actuator 7 can move up and down linearly, so as to drive the valve stem 5 after the eccentric hemispherical valve is fully opened, and drive the liftable sealing valve seat 4 to descend to abut and seal with the outer side of the hemispherical valve disc 3, so that the maintenance personnel can replace the seal on the hemispherical valve disc 3 online without stopping the water.

[0030] It should be noted that this design is improved based on the previous generation product (an eccentric hemispherical valve disclosed in the Chinese patent document with publication number CN219866371U). In this design, the power actuator 7 can adjust the stroke, and the power actuator 7 drives the valve stem 5 to move up and down linearly, thereby making the liftable valve seat move up and down linearly, which effectively solves the following problems:

[0031] 1. Solved the problem of long opening and closing time by converting linear motion through thread rotation.

[0032] 2. Solved the problem of easy jamming during thread rotation (especially when the thread does not move for a long time, the risk of jamming will increase).

[0033] 3. The detachable connection between the power actuator 7 and the valve stem 5 in the present design is exposed from above the valve cover 2. During operation, the position change of the liftable sealing valve seat 4 can be judged based on the position change of the detachable connection to determine whether it is lifted into place, thereby solving the problem of not being able to know whether the liftable sealing valve seat 4 is lifted into place during previous operation.

[0034] 4. The power actuator 7 in this design is mounted on the valve cover 2 through the support seat 6, and is usually not immersed in the medium (water), so it has a longer service life. This design solves the problem of short service life of the threaded transmission mechanism. In traditional designs, after the threaded transmission mechanism is immersed in the medium (water) for a long time, it may react chemically with trace substances in the medium, affecting the service life of the threaded transmission mechanism.

[0035] 5. The previous generation of eccentric hemispherical valves has a guide rod structure, and the torque and guiding effect brought by the guide rod increase the risk of jamming of the previous generation of products. The eccentric hemispherical valve in this design cancels the guide rod structure, eliminating the risk brought by the guide rod.

[0036] 6. The problem of hard contact and easy damage to parts of the liftable valve seat limit in the previous generation of eccentric hemispherical valves has been solved.

[0037] Furthermore, the support seat 6 is detachably connected to the valve cover 2 and / or the power actuator 7, and the support seat 6 has a cavity for accommodating the detachable connection between the power actuator 7 and the valve stem 5, and the side of the support seat 6 has an inspection hole connected to the cavity.

[0038] Preferably, the support seat 6 is a horizontal rectangular tube, which is connected to the valve cover 2 by bolts, and connected to the power actuator 7 by bolts. The lower end of the rectangular tube has a through hole for the valve stem 5 to pass through, and the upper end of the rectangular tube has a through slot for the output end of the power actuator 7 to pass through. In other embodiments, the support seat 6 can also use other forms of support structures that can lift the power actuator 7.

[0039] Further, such as Figure 2-3 As shown, a shaft sealing structure 8 is provided between the support seat 6 and the valve cover 2, and the shaft sealing structure 8 includes but is not limited to using an O-ring, a sealing strip, etc. When the O-ring is selected, an annular groove can be provided between the support seat 6 and the valve cover 2, and the annular groove is used for the installation and positioning of the O-ring.

[0040] Furthermore, the output end of the power actuator 7 and the upper end of the valve stem 5 may be connected by a threaded connection, or may be detachably connected by a first connecting member 9. When the first connecting member 9 is used, the first connecting member 9 may be a pin or a bolt.

[0041] Furthermore, the lower end of the valve stem 5 is detachably connected to the liftable sealing valve seat 4. For example, the lower end of the valve stem 5 is threadedly connected to the liftable sealing valve seat 4, or a second connecting member 10 is used for detachable connection. When the second connecting member 10 is used, the second connecting member 10 can be a pin or a bolt.

[0042] For ease of understanding, Figure 2 An implementation scheme is shown, in which a pin is used to connect the output end of the power actuator 7 and the upper end of the valve stem 5, and a pin is used to connect the lower end of the valve stem 5 and the supporting beam plate in the liftable sealing valve seat 4.

[0043] Furthermore, the power actuator 7 can be any one of a hydraulic actuator, a pneumatic actuator, an electric actuator, and an electro-hydraulic actuator, and can specifically be a hydraulic cylinder, a gas cylinder, an electric push rod, an electro-hydraulic push rod, and the like.

[0044] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations or constituent elements, and do not limit one or more additional functions, operations and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components or combinations thereof.

[0045] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An eccentric hemispherical valve with a linear power actuator, comprising a valve body (1), a valve cover (2) being arranged on the top of the valve body (1), a hemispherical valve disc (3) and a liftable sealing valve seat (4) being arranged in the valve body (1), characterized in that: A valve stem (5) is installed at the upper end of the liftable sealing valve seat (4), and a power actuator (7) is fixed to the upper end of the valve cover (2) through a support seat (6). The output end of the power actuator (7) is detachably connected to the upper end of the valve stem (5), and the detachable connection is exposed above the valve cover (2). The output end of the power actuator (7) can move linearly up and down to drive the valve stem (5) after the eccentric hemispherical valve is fully opened, so that the liftable sealing valve seat (4) is lowered to abut and seal with the outer side of the hemispherical valve disc (3).

2. The eccentric hemispherical valve with a linear power actuator according to claim 1, characterized in that: The output end of the power actuator (7) is threadedly connected to the upper end of the valve stem (5).

3. The eccentric hemispherical valve with a linear power actuator according to claim 1, characterized in that: The output end of the power actuator (7) is connected to the upper end of the valve stem (5) via a first connecting member (9).

4. The eccentric hemispherical valve with a linear power actuator according to claim 1, characterized in that: The lower end of the valve stem (5) is detachably connected to the liftable sealing valve seat (4).

5. The eccentric hemispherical valve with a linear power actuator according to claim 4, characterized in that: The lower end of the valve stem (5) is threadedly connected to the liftable sealing valve seat (4).

6. The eccentric hemispherical valve with a linear power actuator according to claim 4, characterized in that: The lower end of the valve stem (5) is connected to the liftable sealing valve seat (4) via a second connecting member (10).

7. The eccentric hemispherical valve with a linear power actuator according to any one of claims 1 to 6, characterized in that: A shaft sealing structure (8) is provided between the support seat (6) and the valve cover (2).

8. The eccentric hemispherical valve with a linear power actuator according to any one of claims 1 to 6, characterized in that: The support seat (6) is detachably connected to the valve cover (2) and / or the power actuator (7).

9. The eccentric hemispherical valve with a linear power actuator according to any one of claims 1 to 6, characterized in that: The support seat (6) has a cavity for accommodating a detachable connection between the power actuator (7) and the valve stem (5), and a side surface of the support seat (6) has an inspection hole communicating with the cavity.

10. The eccentric hemispherical valve with a linear power actuator according to any one of claims 1 to 6, characterized in that: The power actuator (7) is any one of a hydraulic actuator, a pneumatic actuator, an electric actuator, and an electro-hydraulic actuator.

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