Fan-shaped ball valve
By designing a sealing structure for a sector ball valve and polytetrafluoroethylene composite material, the problem of scaling and sedimentation in ball valves during media transportation was solved, achieving low flow resistance and high sealing performance, ensuring valve stability and process continuity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-03-24
AI Technical Summary
Existing ball valves are prone to precipitation, scaling, and exudation during media transportation, leading to valve opening and closing obstruction, sealing failure, and pipeline blockage, affecting the continuity and stability of industrial processes.
A sector ball valve was designed, which adopts a sector ball structure with clearance fit with the inner wall of the valve cavity. It combines upper and lower bearings made of polytetrafluoroethylene (PTFE) and carbon fiber composite materials, and is equipped with packing group, lower pressure ring, disc spring and middle pressure ring to enhance the sealing performance. The sector cut design reduces flow resistance and scaling.
It enables precise control of media flow, reduces flow resistance, prevents media adhesion and scaling, improves sealing performance, extends valve service life, avoids leakage and jamming, and ensures the stability of industrial processes.
Smart Images
Figure CN224033138U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field especially is involved in a fan -shaped ball valve. BACKGROUND
[0002] In the pipeline transportation system of petroleum, gas, metallurgy and other industries, when the medium flows in the pipeline, due to the comprehensive effect of physical, chemical and biological factors, deposition, scaling and precipitation often occur in the inner wall of the pipeline and the valve. For example, in the petroleum industry, water injection is widely used in major oilfields in China, which leads to a high water content in the produced crude oil, increasing the risk of scaling in the gathering process. The paraffin, tar and inorganic salts containing metal ions (such as sulfates and carbonates) in crude oil are prone to precipitate and adsorb on the pipe wall when the temperature decreases, forming a hard scale layer. The gas industry also faces similar problems. The black powder in the natural gas pipeline is mainly composed of iron rust, corrosion products and particulate matter. These substances deposit in the low-lying part of the pipeline, forming blocky or powdery scale bodies. In the oxygen pipeline system of the metallurgical industry, if the degreasing process is not properly handled, residual oil and impurities may also scale at the valve, affecting the purity and delivery efficiency of oxygen.
[0003] Traditional ball valves, on the one hand, form turbulent flow when the valve is partially opened, causing the medium to stagnate in the valve cavity and accelerating the deposition of impurities. On the other hand, the valve seat and the ball body use hard sealing or PTFE soft sealing. After long-term friction, the surface roughness increases, providing attachment points for scaling. Moreover, the coating technology on the surface of the ball body (such as tungsten carbide spraying) is costly and difficult to cover complex curved surfaces. In addition, the valve cavity structure in the valve body is closed, and the high-pressure water gun cannot completely remove the dead angle dirt during online cleaning.
[0004] Scale deposition, on the one hand, causes the inner diameter of the pipeline to gradually decrease, significantly increasing the fluid resistance. For example, the average scaling rate of the pipelines in some oil areas of Shengli Oilfield reaches 15 mm per month. The increase in scale thickness directly leads to a decrease in crude oil flow rate and a decrease in transportation efficiency. On the other hand, local corrosion under the scale layer accelerates the damage to the pipeline and valve. Microorganisms (such as sulfate-reducing bacteria) in the scale layer reproduce in anaerobic environments, producing corrosive substances that further exacerbate corrosion on the metal surface. In addition, scale detachment can cause damage to the valve sealing surface, leading to medium leakage. At the same time, scaling can also hinder the opening and closing of the valve, causing an increase in operating torque and even causing the valve to be stuck, thereby causing the valve to fail. SUMMARY
[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a fan-shaped ball valve, which effectively solves the problem of easy deposition, scaling and precipitation of conventional ball valves during medium transportation, causing valve sticking, sealing failure and even pipeline blockage, which seriously threatens the continuity and stability of the industrial process.
[0006] To achieve the above object, the utility model provides the following technical scheme: the utility model discloses a valve body and valve cover, the valve body is equipped with the valve cavity of ball, the valve body is rotatably connected with sector ball, the sector ball sets up in the valve cavity, the sector ball is the partial sector cutting structure of the ball body, and its outer edge is matched with the clearance of the inner wall of valve cavity, the lower end fixedly connected with support rod of sector ball, support rod with the valve body rotatable connection, the upper end fixedly connected with valve stem of sector ball, the valve stem passes through valve body and is rotatably connected with valve body, and support rod with the outer portion of valve stem is equipped with sealing assembly, and the lower end of support rod is equipped with gland.
[0007] Preferably, the outer end of the valve rod is connected with the upper shaft and the lower bearing, the sealing assembly is located between the upper bearing and the lower bearing, the valve body is provided with a clamping groove matched with the lower bearing, the upper bearing is externally sleeved with a nut pressing sleeve, the upper end of the nut pressing sleeve is provided with a clamping spring, the upper end of the clamping spring is provided with an upper pressing ring, and the nut pressing sleeve is threadedly connected with the valve body.
[0008] Preferably, the sealing assembly comprises a packing group, the upper end of the packing group is provided with a lower pressing ring, the upper end of the lower pressing ring is provided with a disc spring, the upper end of the disc spring is provided with a middle pressing ring, and the middle pressing ring is located below the upper bearing and the nut pressing sleeve.
[0009] Preferably, a fixing key is installed between the sector ball and the valve rod, a connector is fixedly connected to the upper end of the valve rod, the connector is rotatably connected with a support, the connector penetrates the support, and a fixing bolt is installed between the support and the valve body.
[0010] Preferably, the valve cover is detachably connected with the valve body through a locking bolt, a sealing gasket is installed between the valve cover and the valve body, and the sealing gasket is located on the inner side of the locking bolt.
[0011] Preferably, a connecting bolt is rotatably connected to the valve body, a pressing piece is sleeved on the connecting bolt, the connecting bolt is threadedly connected with the valve cover, a valve seat is installed between the valve cover and the valve body, and an O-ring is arranged between the valve seat and the valve cover.
[0012] Compared with the prior art, the utility model has the following advantages:
[0013] In the utility model, the valve cavity of the valve body is a sector ball, the sector cutout design of the sector ball makes it have the functions of adjustment and cut-off, can accurately control the medium flow and keep low flow resistance, and meanwhile, the sealing seat and the sector surface of the sector ball always keep contact, preventing medium adhesion and fouling.
[0014] This invention employs a packing assembly, a lower pressure ring, a disc spring, a middle pressure ring, and a nut sleeve from bottom to top within the valve body, resulting in better sealing performance. At the same time, the disc spring compensates for wear and tear on the packing assembly, ensuring sufficient downward pressure on the packing assembly and reducing the risk of external leakage.
[0015] This invention features an upper bearing and a lower bearing on the valve stem outer sleeve to increase valve stem stability. The upper bearing, lower bearing, and packing assembly are made of polytetrafluoroethylene (PTFE) and carbon fiber composite material to increase wear resistance. A retaining ring is installed at the upper end of the upper bearing to prevent vertical movement of the upper bearing and improve valve stem stability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of this utility model.
[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of this utility model.
[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the sector-shaped sphere of this utility model.
[0019] Figure 4 This is a top view schematic diagram of the first configuration of the sector-shaped ball and valve body of this utility model.
[0020] Figure 5 This is a top view schematic diagram of the second form of the sector-shaped ball and valve body of this utility model.
[0021] Figure 6 This is a top view schematic diagram of the third configuration of the sector-shaped ball and valve body of this utility model.
[0022] The following are the labels in the diagram: 1. Valve body; 2. Sector ball; 3. Valve stem; 4. Lower bearing; 5. Packing assembly; 6. Lower pressure ring; 7. Disc spring; 8. Intermediate pressure ring; 9. Nut sleeve; 10. Upper bearing; 11. Upper pressure ring; 12. Snap ring; 13. Connector; 14. Bracket; 15. Fixing bolt; 16. Valve cover; 17. Locking bolt; 18. Sealing gasket; 19. Connecting bolt; 20. Pressure plate; 21. O-ring; 22. Valve seat; 23. Support rod; 24. Gland; 25. Fixing key. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. 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.
[0024] Please see the appendixFigures 1-6 The embodiment of the fan-shaped ball valve: including the valve body 1 and the valve cover 16, the valve body 1 is provided with the ball-shaped valve cavity, the valve body 1 is rotatably connected with the fan-shaped ball 2, the fan-shaped ball 2 is arranged in the valve cavity, the fan-shaped ball 2 is the partial fan-shaped cutting structure of the ball, the outer edge is matched with the inner wall of the valve cavity, the lower end of the fan-shaped ball 2 is fixedly connected with the support rod 23, the support rod 23 is rotatably connected with the valve body 1, the upper end of the fan-shaped ball 2 is fixedly connected with the valve stem 3, the valve stem 3 penetrates the valve body 1 and is rotatably connected with the valve body 1, the support rod 23 and the valve stem 3 are provided with a sealing assembly outside, and the lower end of the support rod 23 is provided with a gland 24.
[0025] The fan-shaped ball 2 is the opening and closing element of the whole valve body 1, the position of the fan-shaped ball 2 in the valve cavity of the valve body 1 is controlled to control the opening and closing of the valve and the adjustment of the flow size, the fan-shaped ball 2 transmits the power of the torsional motion through the valve stem 3, the fixed key 25 between the valve stem 3 and the fan-shaped ball 2 prevents the relative rotation of the two, ensures that the fan-shaped ball 2 can rotate synchronously with the valve stem 3, and ensures that the force of the valve stem 3 can be transmitted to the fan-shaped ball 2, the fan-shaped ball 2 is the partial fan-shaped cutting structure of the ball, one side curve of the fan-shaped ball 2 is the same as the outside curve of the ball, the other two side curves of the fan-shaped ball 2 are vertical planes, the three edges of the fan-shaped ball 2 can be attached to the inner wall of the valve cavity during rotation, can scrape the scale in the valve cavity during rotation, avoids the adhesion of the scale, and the plane structure can be better coated than the curved surface structure, reduces the friction and collision in the rotating process, keeps the surface smooth, reduces the adhesion of dirt on the surface, the upper end of the fan-shaped ball 2 is supported by the valve stem 3, the lower end of the fan-shaped ball 2 is supported by the support rod 23, in order to ensure the sealing property of the valve body 1, the valve stem 3 and the support rod 23 are both provided with a sealing assembly for sealing, the lower end of the support rod 23 does not need to penetrate the valve body 1, the lower end of the support rod 23 is provided with the gland 24, the gland 24 is located on the surface of the valve body 1, the upper end of the valve stem 3 penetrates the valve body 1, the upper end of the valve stem 3 is connected with the actuator through the connecting head 13, the actuator is fixed on the middle flange of the valve stem 3 through the support 14, and the torque on the actuator is transmitted to the valve stem 3 through the connecting head 13.
[0026] The vertical length of the valve stem 3 is relatively long, in order to ensure the stability of the valve stem 3, the upper bearing 10 and the lower bearing 4 are installed on the valve stem 3, the upper bearing 10 and the lower bearing 4 are used for limiting the position of the valve stem 3, and the stability of the valve stem 3 is ensured, and the sealing assembly is located between the upper bearing 10 and the lower bearing 4, the upper pressing ring 11 is installed on the upper end of the upper bearing 10, the upper pressing ring 11 presses the upper bearing 10 downward, the upper end of the upper pressing ring 11 is the snap spring 12, the cooperation of the snap spring 12 and the upper pressing ring 11 can avoid the up-and-down movement of the upper bearing 10 and the lower bearing 4, and the stability of the valve stem 3 is further improved.
[0027] The sealing assembly is sequentially filled with packing group 5, lower pressing ring 6, disc spring 7 and middle pressing ring 8 from bottom to top, the packing group 5 is made of polytetrafluoroethylene (PTFE) and carbon fiber composite material, which effectively increases the wear resistance of the packing group 5, the disc spring 7 can increase the pre-tightening force on the packing group 5, and after multiple uses, the packing group 5 is prone to wear and leakage, the disc spring 7 can effectively compensate the compression displacement, so as to ensure that the packing group 5 has sufficient force and reduce the risk of leakage of the packing group 5.
[0028] The connecting head 13 is used for connecting the actuator and the valve stem 3, the outer end of the connecting head 13 is limited by the support 14, the connecting head 13 can rotate in the support 14, and the support 14 is installed on the valve body 1 by the fixing bolt 15, so as to ensure the stability of the support 14.
[0029] The valve cover 16 is located at the left side of the valve body 1, the valve cover 16 is fixed with the valve body 1 through the locking nut, and the two can be disassembled and assembled, the sealing gasket 18 of the valve cover 16 increases the sealing property of the connection, and avoids leakage of the position of the valve cover 16.
[0030] The valve cover 16 is located at the left side of the valve body 1, the valve cover 16 is fixed with the valve body 1 through the locking nut, and the two can be disassembled and assembled, the sealing gasket 18 of the valve cover 16 increases the sealing property of the connection, and avoids leakage of the position of the valve cover 16.
[0031] Finally, it should be noted that: the above only for preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.
Claims
1. A sector-shaped ball valve, characterized in that: The valve includes a valve body (1) and a valve cover (16). The valve body (1) has a spherical valve cavity. A fan-shaped ball (2) is rotatably connected inside the valve body (1). The fan-shaped ball (2) is located inside the valve cavity. The fan-shaped ball (2) is a partial fan-shaped cut structure of a sphere. Its outer edge is in clearance fit with the inner wall of the valve cavity. A support rod (23) is fixedly connected to the lower end of the fan-shaped ball (2). The support rod (23) is rotatably connected to the valve body (1). A valve stem (3) is fixedly connected to the upper end of the fan-shaped ball (2). The valve stem (3) passes through the valve body (1) and is rotatably connected to the valve body (1). A sealing assembly is provided outside the support rod (23) and the valve stem (3). A pressure cap (24) is provided at the lower end of the support rod (23).
2. A sector ball valve according to claim 1, characterized in that: The valve stem (3) is connected to an upper shaft and a lower bearing (4) at its outer end. The sealing assembly is located between the upper bearing (10) and the lower bearing (4). The valve body (1) is provided with a groove for the lower bearing (4) to fit. The upper bearing (10) is fitted with a nut sleeve (9). The upper end of the nut sleeve (9) is provided with a retaining ring (12). The upper end of the retaining ring (12) is provided with an upper pressure ring (11). The nut sleeve (9) is threadedly connected to the valve body (1).
3. A sector ball valve according to claim 1, characterized in that: The sealing assembly includes a packing group (5), a lower pressure ring (6) is provided above the packing group (5), a disc spring (7) is provided above the lower pressure ring (6), and a middle pressure ring (8) is provided above the disc spring (7). The middle pressure ring (8) is located below the upper bearing (10) and the nut sleeve (9).
4. A sector ball valve according to claim 1, characterized in that: A fixing key (25) is installed between the sector ball (2) and the valve stem (3). A connector (13) is fixedly connected to the upper end of the valve stem (3). A bracket (14) is rotatably connected to the connector (13). The connector (13) passes through the bracket (14). A fixing bolt (15) is installed between the bracket (14) and the valve body (1).
5. A sector ball valve according to claim 1, characterized in that: The valve cover (16) and the valve body (1) are detachably connected by a locking bolt (17). A sealing gasket (18) is installed between the valve cover (16) and the valve body (1), and the sealing gasket (18) is located inside the locking bolt (17).
6. A sector ball valve according to claim 5, characterized in that: A connecting bolt (19) is rotatably connected to the valve body (1), and a pressure plate (20) is fitted on the connecting bolt (19). The connecting bolt (19) is threadedly connected to the valve cover (16). A valve seat (22) is installed between the valve cover (16) and the valve body (1), and an O-ring (21) is provided between the valve seat (22) and the valve cover (16).