High-pressure-difference C-shaped adjusting ball valve

Abstract

The utility model discloses a high-pressure-difference C-shaped adjusting ball valve, which belongs to the technical field of valves and comprises a valve body, a valve seat is mounted in the valve body, a C-shaped ball hermetically matched with the valve seat is mounted in the valve seat, and a valve rod for regulating and controlling the C-shaped ball is mounted on the valve body. A throttling orifice plate device which is used for performing multi-stage regulation and pressure reduction on fluid in the valve body and is positioned at the front part of the valve seat is mounted in the valve body, the throttling orifice plate device comprises a throttling circular plate which is mounted in the valve body and is positioned at the front part of the valve seat, and a plurality of throttling orifices are formed in the side surface of the throttling circular plate; according to the combined throttling orifice plate type multi-stage pressure reduction C-shaped regulating valve, multi-stage pressure reduction regulation is carried out on fluid in the valve body through the throttling orifice plate device, so that the pressure difference of valve internals is smaller than the critical pressure difference for generating cavitation, erosion corrosion of throttling parts in the valve is avoided, and the service life of the valve is prolonged. And the damage such as cavitation and noise caused by the cavitation phenomenon is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially is related to a high pressure difference C type regulating ball valve. BACKGROUND

[0002] C type ball valve is widely used in petroleum chemical industry as a regulating valve, especially has the unique advantage in the large diameter pipeline, its core component adopts the spherical structure, and realizes the quick opening and closing through the 90 degrees rotation of valve stem. The "C type" in its name is derived from the C-shaped flow passage design inside the ball, this structure can form the approximately straight-through flow passage when the valve is fully opened, which significantly reduces the fluid resistance, and is suitable for high flow rate or particle-containing medium working conditions. The valve adopts metal hard sealing or soft sealing structure, and has excellent sealing performance, the leakage level can reach VI level, and the pressure resistance range is wide (PN16-PN100). Compared with ordinary ball valves, the C type ball valve has shearing function, and is especially suitable for processing fiber, slurry and other easy deposition media, and is widely applied in the fields of petroleum, chemical industry and papermaking. With the progress of technology, the parameters of the pipeline are also higher and higher, and the pressure difference is also larger and larger. In high pressure difference occasions, due to the high flow rate, the erosion corrosion of the throttling component in the valve is easily caused, and the cavitation, noise and other hazards caused by cavitation are also accompanied.

[0003] The main reason for the cavitation of the regulating valve is that the pressure difference before and after the valve is too high. The existing C type regulating ball valve mainly adjusts the flow rate by the opening size of the valve inner part. When the pressure difference is large, the pressure of the fluid suddenly decreases when entering the throttling part in the valve, and the pressure is the lowest at the minimum flow area. When this pressure is lower than the saturation vapor pressure of the fluid at the current temperature, part of the liquid will vaporize to form a large number of small bubbles. When the pressure of the fluid rises through the throttling port, these bubbles also break and return to liquid state, thereby easily causing impact on the valve inner part and producing noise, vibration and other hazards. Therefore, a new solution is provided.

[0004] Therefore, it is necessary to provide a high pressure difference C type regulating ball valve to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a high pressure difference C type regulating ball valve to solve the problems in the above background technology.

[0006] To achieve the above object, the utility model discloses the following technical scheme for solving the above technical problem: a high pressure difference C type ball valve, including the valve body, the inside installation of valve body has the valve seat, the inside installation of valve seat has the C type ball with the sealing cooperation of valve seat, install the valve stem of C type ball on the valve body and carry out the regulation and control, install the throttle orifice plate device of multistage regulation and reduction pressure in the fluid of valve body inside and be located at the front portion of valve seat in the valve body, the throttle orifice plate device includes the throttle round plate of being installed in the inside of valve body and being located at the front portion of valve seat, a plurality of throttle orifices are seted up on the side of throttle round plate.

[0007] As a further scheme of the utility model, the throttle round plate is provided with a plurality of throttle orifices, and one end of the throttle orifice close to the valve seat is provided with a flared portion.

[0008] As a further scheme of the utility model, the throttle orifices on the adjacent two throttle round plates are distributed in a staggered manner.

[0009] As a further scheme of the utility model, a gap is arranged between the adjacent two throttle round plates.

[0010] As a further scheme of the utility model, an outer shell is fixed to the inner side wall of the valve body, and the plurality of throttle round plates are fixed in the inner portion of the outer shell.

[0011] As a further scheme of the utility model, a valve cover is arranged on the valve body to seal the upper portion of the valve body, and an upper support shaft and a lower support shaft are arranged on the valve body to assist in supporting the C type ball.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. When the fluid in the valve body flows through the plurality of throttle round plates, the area of the fluid flowing through the flared portion of the throttle orifice is increased, the flow rate is reduced, and the pressure is reduced. The throttle orifices on each layer of throttle round plates are arranged in a staggered manner. The fluid flowing through the throttle orifice first hits the solid side wall of the adjacent throttle round plate, is attenuated and reduced in pressure, and then flows out of the throttle orifice on the adjacent throttle round plate. Therefore, the fluid is further reduced in pressure. A certain gap is left between each layer of throttle round plates, so that the fluid flowing through the throttle orifice is further buffered, thereby further reducing the flow rate of the fluid, reducing noise, making the pressure difference of the valve internals less than the critical pressure difference at which cavitation occurs, avoiding erosion and corrosion of the valve internal throttle components, and avoiding the hazards of cavitation and noise;

[0014] 2. According to the size of the pressure difference, a plurality of levels of throttle round plates can be arranged in front of the valve seat. The number of the plurality of levels of throttle round plates can be set according to the size of the pressure difference, which facilitates combination and can be used in high pressure difference environments. The plurality of levels of throttle round plates can meet the requirements of pressure reduction and noise reduction, and can also ensure a large flow rate. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model is further described below in combination with the drawings and examples:

[0016] Figure 1 It is the valve body internal structure schematic view of the utility model;

[0017] Figure 2 It is the throttle orifice plate device structure schematic view of the utility model;

[0018] Figure 3 It is the throttle round plate front view structure schematic view of the utility model;

[0019] Figure 4 It is the flared local structure schematic view of the utility model.

[0020] In the drawings, the component list represented by each sign is as follows:

[0021] 1, throttle orifice plate device;101, throttle round plate;102, throttle hole;103, flared;104, shell;2, C type ball;3, valve body;4, valve seat;5, valve cover;6, upper support shaft;7, valve stem;8, lower support shaft. Specific implementation

[0022] The utility model is further described below in combination with the examples.

[0023] Please refer to Figures 1-4 The utility model provides a kind of high-pressure difference C type regulating ball valve, including valve body 3, valve seat 4 is installed in the inside of valve body 3, C type ball 2 is installed in the inside of valve seat 4, and C type ball 2 is sealed with valve seat 4 cooperation, valve stem 7 is installed on valve body 3, and throttle orifice plate device 1 is installed in the inside of valve body 3 and located at the front of valve seat 4, and throttle orifice plate device 1 is carried out multistage regulation and depressurization to the fluid in the inside of valve body 3, throttle orifice plate device 1 includes throttle round plate 101 installed in the inside of valve body 3 and located at the front of valve seat 4, and a plurality of throttle holes 102 are set on the side of throttle round plate 101;Existing C type regulating ball valve, mainly rely on the opening size of valve inner piece to adjust flow, when pressure difference is larger, fluid enters throttle position in the inside of valve, and pressure drops suddenly, and when the minimum flow area, pressure drops to the minimum, when this pressure is lower than the saturation vapor pressure of fluid at the moment, part liquid will appear vaporization, form a large number of tiny bubbles, when fluid pressure rises over throttle, these bubbles also break and return to liquid state, to cause impact to valve inner piece and produce noise, vibration and other hazards, the utility model designs a kind of combined throttle orifice plate type multistage depressurization C type regulating valve, and the fluid in the inside of valve body 3 is carried out multistage depressurization regulation by the throttle orifice plate device 1 of setting, so that the critical pressure difference of cavitation of the pressure difference of valve inner piece is less than 1.0MPa, avoid causing the erosion of valve inner throttle component, avoid the cavitation caused by cavitation, noise and other hazards.

[0024] Further as Figure 1 , Figure 3 and Figure 4 illustrated, it is worth noting that the throttle disc 101 is provided with a plurality of throttle holes 102, and the end of the throttle hole 102 close to the valve seat 4 is provided with a flared portion 103; when the fluid in the valve body 3 flows through the plurality of throttle discs 101, the area of the fluid flowing through the flared portion 103 of the throttle hole 102 increases, the flow rate decreases, and the pressure decreases. According to the size of the pressure difference, a plurality of throttle discs 101 can be arranged in front of the valve seat 4. The number of the plurality of throttle discs 101 can be set according to the size of the pressure difference, which is convenient for combination and can meet the requirements of high pressure difference. The throttle disc 101 structure can not only meet the requirements of pressure reduction and noise reduction, but also ensure a large flow rate.

[0025] Further as Figure 2 illustrated, it is worth noting that the throttle holes 102 on the adjacent two throttle discs 101 are distributed in a staggered manner; by staggering the throttle holes 102 on each layer of throttle disc 101, the fluid flowing through the throttle holes 102 first hits the solid side wall of the adjacent throttle disc 101, and then flows out from the throttle hole of the adjacent throttle disc 101, thereby further reducing the pressure of the fluid.

[0026] Further as Figure 1 and Figure 2 illustrated, it is worth noting that a gap is provided between the adjacent two throttle discs 101; by leaving a certain gap between each layer of throttle disc 101, the fluid flowing through the throttle hole 102 is further buffered, thereby further reducing the speed of the fluid and reducing noise.

[0027] Further as Figure 1 and Figure 2 illustrated, it is worth noting that the inner side wall of the valve body 3 is fixed with a shell 104, and the plurality of throttle discs 101 are fixed inside the shell 104; during operation, the shell 104 can be removed, and the plurality of throttle discs 101 can be removed synchronously, which is convenient for maintenance and replacement.

[0028] Further as Figure 1 illustrated, it is worth noting that the valve body 3 is provided with a valve cover 5 for sealing the upper part of the valve body 3, and the valve body 3 is provided with an upper support shaft 6 and a lower support shaft 8 for auxiliary supporting the C-shaped ball 2.

[0029] The utility model discloses a kind of combined throttle orifice plate type multistage pressure reduction C type regulating valve, when the fluid in valve body 3 flows through multiple throttle round plate 101, the area increases when fluid flows through flared portion 103 on throttle hole 102, flow rate reduces, pressure reduces, according to pressure difference size, multiple throttle round plate 101 can be set before valve seat 4, the quantity of this multiple throttle round plate 101 can be set according to pressure difference size, it is convenient to combine, can be responsible for high pressure difference occasion, throttle hole 102 on each layer throttle round plate 101 is arranged staggeredly, fluid flowing through throttle hole 102 first hits the entity side wall of adjacent throttle round plate 101, attenuates pressure reduction, then again from the throttle hole 102 throttle hole on adjacent throttle round plate 101 flow, to further depressurize fluid, by the gap between each layer throttle round plate 101, fluid flowing through throttle hole 102 is further buffered, to further reduce the control of fluid velocity, reduce noise, carry out multistage pressure reduction regulation to the fluid in valve body 3, so that the pressure difference of valve inner part is less than the critical pressure difference of cavitation, avoid causing the erosion of valve inner throttle component, avoid the harm such as cavitation, noise caused by cavitation phenomenon.

Claims

1. A high-pressure-drop C-type regulating ball valve comprising a valve body (3), characterized in that, The valve body (3) is internally provided with a valve seat (4), the valve seat (4) is internally provided with a C-shaped ball (2) in sealing cooperation with the valve seat (4), the valve body (3) is provided with a valve rod (7) for regulating the C-shaped ball (2), the valve body (3) is internally provided with a throttle orifice plate device (1) for multi-stage regulating and pressure reducing of fluid in the valve body (3) and located at the front of the valve seat (4), the throttle orifice plate device (1) comprises a throttle disc (101) internally provided in the valve body (3) and located at the front of the valve seat (4), a plurality of throttle holes (102) are formed in the side surface of the throttle disc (101).

2. The high-pressure-drop C-type regulating ball valve according to claim 1, characterized in that The throttle disc (101) is provided with a plurality of throttle holes (102), and the end of the throttle hole (102) close to the valve seat (4) is provided with a flared portion (103).

3. The high-pressure-drop C-type regulating ball valve according to claim 2, characterized in that The throttle holes (102) on the adjacent two throttle discs (101) are distributed in a staggered manner.

4. The high-pressure-drop C-type regulating ball valve according to claim 3, characterized in that A gap is arranged between the adjacent two throttle discs (101).

5. The high-pressure-drop C-type regulating ball valve according to claim 2, characterized in that, The inner side wall of the valve body (3) is fixedly provided with an outer shell (104), and the plurality of throttle discs (101) are fixedly arranged in the outer shell (104).

6. The high-pressure-drop C-type regulating ball valve according to claim 1, characterized in that, The valve body (3) is provided with a valve cover (5) for sealing the upper part of the valve body (3), and the valve body (3) is provided with an upper support shaft (6) and a lower support shaft (8) for auxiliary supporting the C-shaped ball (2).

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