Sediment erosion prevention type eccentric semi-ball valve

Abstract

The utility model discloses a sediment erosion prevention type eccentric semi-ball valve which comprises a valve body, a valve cover is fixed to the surface of the valve body in a screwed mode, a valve seat supporting ring is arranged in the valve body and installed on a step on the right side in the valve body, and a pressing plate is fixedly installed on the right side of the valve seat supporting ring. A spherical crown supporting plate is installed on the side, away from the pressing plate, of the valve seat supporting ring, a rubber sealing ring is arranged between the spherical crown supporting plate and the valve seat supporting ring, and a hemisphere is movably installed in the valve body. According to the sediment erosion prevention type eccentric half ball valve, due to the unique soft and hard double-sealing design, forward and reverse water inflow and the parabola-shaped water flow direction, two-way sealing is achieved, sealing zero leakage is achieved, the valve seat is designed to be of a floating structure, when the device is used, the device can be continuously used under the condition that overhauling is not needed, and after the overhauling period, the service life of the device is prolonged by replacing the rubber sealing ring. And long-term use can be continued.

Description

Technical Field

[0001] The utility model relates to the field of ball valves, in particular to an eccentric semi-ball valve that is anti-sand erosion type. Background Art

[0002] The eccentric semi-ball valve is a relatively new type of ball valve. It has some advantages unique to its structure, such as no friction when opening and closing, the seal is not easy to wear, and the opening and closing torque is small. This can reduce the specifications of the actuator. Equipped with a multi-turn electric actuator, it can achieve the adjustment and strict shutoff of the medium. It is widely used in petroleum, chemical industry, urban water supply and drainage and other working conditions that require strict shutoff.

[0003] The existing eccentric hemispherical valve has the following disadvantages:

[0004] If the valve seat rubber ring of ordinary structure is used for sealing, it is easy to wear and corrode, and it is also easy to cause leakage. Online replacement will not achieve the effect of reliable sealing and no leakage, and even the entire valve may be scrapped, causing losses to the company;

[0005] Therefore, we propose an anti-sediment erosion type eccentric semi-ball valve. Utility Model Content

[0006] The utility model aims to provide an anti-sand erosion type eccentric hemispherical valve to solve the defects mentioned in the above background technology.

[0007] In order to achieve the above-mentioned purpose, an anti-sediment erosion type eccentric hemispherical valve is provided, comprising a valve body, a valve cover is screwed to the surface of the valve body, a valve seat support ring is arranged inside the valve body, and the valve seat support ring is installed on the step on the right side of the inside of the valve body, and a pressure plate is fixedly installed on the right side of the valve seat support ring, a ball crown support plate is installed on the side of the valve seat support ring away from the pressure plate, and a rubber sealing ring is arranged between the ball crown support plate and the valve seat support ring, and a hemispherical ball is movably installed inside the valve body;

[0008] A clamping ring is arranged inside the valve seat support ring, and the clamping ring is fixedly installed on the inner wall surface of the valve seat support ring through a hexagon socket bolt.

[0009] Preferably, the spherical crown support plate is made of alloy material, the upper end of which is a right-angled trapezoidal structure, and the lower end of which is a rectangular structure, and the bottom of the spherical crown support plate is screwed and fixed to the hemisphere.

[0010] Preferably, a lower slope is provided on the upper right side of the spherical crown support plate, and lower slopes are provided on the left end faces of the clamping ring and the valve seat support ring, and the lower slopes are attached together and sealed by a rubber sealing ring.

[0011] Preferably, the cross section of the rubber sealing ring is gourd-shaped, and the ball crown support plate and the valve seat support ring are vertically arranged.

[0012] Preferably, the pressure plate and the valve seat support ring are fixed by bolts, and the bolts pass through the through holes opened on the pressure plate and are screwed and fixed inside the screw holes opened on the right side surface of the valve seat support ring.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] Since a clamping ring is set between the rubber sealing ring and the valve seat support ring, the part in contact with the rubber sealing ring is welded with hard alloy. This unique soft and hard double sealing design, forward and reverse water inflow, the water flow direction is parabolic, not only realizes bidirectional sealing, but also achieves zero sealing leakage. The valve seat is designed as a floating structure: radial adjustment, axial displacement;

[0015] It can automatically compensate for the wear of the sealing surface after long-term use, and is also convenient for online replacement and maintenance; when using this device, it can be used continuously without maintenance. After the maintenance period, it can continue to be used for a long time by replacing the rubber sealing ring 5, thereby increasing the service life of the equipment and reducing the maintenance costs of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is an enlarged schematic diagram of the sealing part A of the utility model.

[0018] Numbers in the figure: 1, valve body; 2, valve cover; 3, hemisphere; 4, pressure plate; 5, rubber sealing ring; 6, retaining ring; 7, valve seat support ring; 8, ball crown support plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-2 The utility model provides an anti-sediment erosion type eccentric hemispherical valve, comprising a valve body 1, a valve cover 2 is screwed and fixed on the surface of the valve body 1, and a valve seat support ring 7 is arranged inside the valve body 1, and the valve seat support ring 7 is installed on the step on the right side of the inside of the valve body 1, and a pressure plate 4 is fixedly installed on the right side of the valve seat support ring 7, a ball crown support plate 8 is installed on the side of the valve seat support ring 7 away from the pressure plate 4, and a rubber sealing ring 5 is arranged between the ball crown support plate 8 and the valve seat support ring 7, and a hemispherical ball 3 is movably installed inside the valve body 1;

[0021] A clamping ring 6 is arranged inside the valve seat support ring 7 , and the clamping ring 6 is fixedly mounted on the inner wall surface of the valve seat support ring 7 by means of hexagon socket bolts.

[0022] Working principle: Since a clamping ring 6 is arranged between the rubber sealing ring 5 and the valve seat support ring 7, the part in contact with the rubber sealing ring 5 is welded with hard alloy. With this unique soft and hard double sealing design, water can flow in both positive and reverse directions, and the water flow direction is parabolic, which not only realizes two-way sealing, but also achieves zero leakage of sealing. The valve seat is designed as a floating structure: radial adjustment and axial displacement, which can automatically compensate for the wear of the sealing surface after long-term use, and is also convenient for online replacement and maintenance; when using this device, it can be used continuously without maintenance, and after the maintenance period, it can continue to be used for a long time by replacing the rubber sealing ring 5.

[0023] As a preferred embodiment, the spherical crown support plate 8 is made of alloy material and has a right-angled trapezoidal structure at the upper end, and a rectangular structure at the lower end. Meanwhile, the bottom of the spherical crown support plate 8 is screwed and fixed to the hemisphere 3.

[0024] A lower slope is formed on the upper right side of the spherical crown support plate 8 , and lower slopes are formed on the left end faces of the clamping ring 6 and the valve seat support ring 7 . The lower slopes are attached together and sealed by the rubber sealing ring 5 .

[0025] The cross section of the rubber sealing ring 5 is gourd-shaped, and the ball crown support plate 8 and the valve seat support ring 7 are vertically arranged.

[0026] As a preferred implementation, the pressure plate 4 and the valve seat support ring 7 are fixed by bolts, and the bolts pass through the through holes provided on the pressure plate 4 and are screwed and fixed inside the screw holes provided on the right side surface of the valve seat support ring 7 .

[0027] like Figure 1-2 As shown: the ball crown support plate 8 and the eccentric hemisphere 3 are connected by hexagon socket screws and sealed with O-rings. The valve seat is installed on the right side of the valve body 1. The valve seat is connected to the valve body 1 through four open rings. Hexagon socket screws and hexagon socket set screws are set between the valve seat and the four open rings. The valve seat can be moved left and right by adjusting the hexagon socket screws and the hexagon socket set screws. Then, the compression amount between the rubber seal ring 5 and the ball crown support plate 8 is adjusted to make the sealing between the rubber and the ball crown support plate 8, and between the valve seat and the ball crown support plate 8 synchronized; the spherical surface of the ball crown support plate 8 and the rubber seal ring 5 is welded with hard alloy, and the introduction angle is set on the inner and outer sides. During the opening and closing process of the valve, it is ensured that the valve body seal ring can be well retreated when the mud and sand are embedded, thereby improving the service life of the valve body seal ring. When using this device, it can be used continuously without maintenance. After the maintenance period, it can continue to be used for a long time by replacing the rubber seal ring 5.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-sand erosion type eccentric hemispherical valve, comprising a valve body (1), characterized in that: The valve cover (2) is screwed to the surface of the valve body (1), and a valve seat support ring (7) is arranged inside the valve body (1). The valve seat support ring (7) is installed on a step on the right side of the valve body (1), and a pressure plate (4) is fixedly installed on the right side of the valve seat support ring (7). A ball crown support plate (8) is installed on the side of the valve seat support ring (7) away from the pressure plate (4), and a rubber sealing ring (5) is arranged between the ball crown support plate (8) and the valve seat support ring (7). A hemisphere (3) is movably installed inside the valve body (1); A clamping ring (6) is arranged inside the valve seat support ring (7), and the clamping ring (6) is fixedly mounted on the inner wall surface of the valve seat support ring (7) by means of hexagon socket bolts.

2. The anti-sand erosion eccentric hemispherical valve according to claim 1, characterized in that: The spherical crown support plate (8) is made of alloy material, and the upper end thereof is a right-angled trapezoidal structure, and the lower end thereof is a rectangular structure. Meanwhile, the bottom of the spherical crown support plate (8) is screwed and fixed to the hemisphere (3).

3. The anti-sand erosion eccentric hemispherical valve according to claim 1, characterized in that: The upper right side of the spherical crown support plate (8) is provided with a lower inclined surface, and the left end surfaces of the clamping ring (6) and the valve seat support ring (7) are both provided with lower inclined surfaces, and the lower inclined surfaces are attached together and sealed by a rubber sealing ring (5).

4. The anti-sediment erosion type eccentric hemispherical valve according to claim 3, characterized in that: The cross section of the rubber sealing ring (5) is gourd-shaped, and the ball crown support plate (8) and the valve seat support ring (7) are vertically arranged.

5. The anti-sand erosion eccentric hemispherical valve according to claim 1, characterized in that: The pressure plate (4) and the valve seat support ring (7) are fixed by bolts, and the bolts pass through the through holes provided on the pressure plate (4) and are screwed and fixed inside the screw holes provided on the right side surface of the valve seat support ring (7).

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