Fixed hard sealing ball valve

Abstract

The utility model discloses a fixed hard sealing ball valve which comprises a valve rod sleeve, the bottom end of the valve rod sleeve is in threaded connection with a valve body, the outer surface of one side of a first connecting plate is in threaded connection with a second connecting plate, and the outer surface of the side, away from the first connecting plate, of the second connecting plate is fixedly connected with a lubricating system. The lubricating system comprises an adjusting valve, an oil tank cover, an oil tank, an oil outlet, an oil pipe, an oil hole and an oil channel, an oil filling port is formed in the top of the oil tank, the oil tank cover is installed on the outer surface of the oil filling port, the oil outlet is formed in the bottom end of the oil tank, the oil pipe is installed at the bottom end of the oil outlet, and the adjusting valve is arranged on the outer surface of the oil pipe. The end, away from the oil outlet, of the oil pipe is fixedly connected with an oil hole, the oil hole is fixedly connected to the outer surface of the valve rod sleeve, and an oil channel is formed in the valve rod sleeve and extends in the height direction of the valve rod sleeve. By means of the structure, friction and abrasion between the valve rod and the valve rod sleeve are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fixed ball valves, in particular to a fixed hard-sealed ball valve. Background Art

[0002] A trunnion ball valve is a ball valve design in which the ball portion is firmly fixed inside the valve body, rather than being able to move under media pressure like a floating ball valve. The ball of this valve is supported by upper and lower valve stems and is stabilized by bearings, ensuring the ball is centered and precisely controlled during rotation. Trunnion ball valves are typically used in high-pressure and large-diameter applications because their structure can withstand greater pressure without seal failure. In addition, because the ball is fixed, the design can reduce wear inside the valve and improve long-term sealing performance and reliability. Trunnion ball valves are widely used in the oil and gas, chemical and other industrial process control fields, especially in situations where high sealing and durability are required.

[0003] When applying for the present invention, the applicant found through search that a Chinese patent disclosed a "high-pressure hard-sealed fixed ball valve", and its application number is "CN201821256399.X". The patent mainly uses left and right bodies, which are divided into two parts. The two parts of the left and right bodies are fixedly connected by two first stud bolts, and each of the first stud bolts is located at one end of the outside of the left and right bodies and is sleeved with a first nut. The two parts of the left and right bodies are sealed and connected with the first graphite packing sealing ring through a second winding ring, and a rotating groove is opened in the left and right bodies.

[0004] However, the device lacks a lubrication system between the valve stem and the valve stem sleeve. The direct metal contact between the valve stem and the valve stem sleeve will increase friction in the absence of lubrication, which will not only require more force to operate the valve, but also cause the operation to be less smooth. In the long run, this increased friction will accelerate the wear of the valve stem and the sleeve, reducing the overall service life of the valve. Due to the increased friction, wear particles may accumulate on the contact surface of the valve stem and the sleeve, which may further deteriorate the sealing performance, thereby increasing the risk of leakage. Leakage will not only cause the loss of the medium, but also cause environmental pollution, and is particularly dangerous when handling hazardous or corrosive media. Especially in low temperature environments, the lack of lubrication and protective layer of lubricating oil between metal parts may cause the valve to stick or operate abnormally, which will reduce the reliability and safety of the system. Therefore, the lubrication system is essential to maintain the long-term performance, efficiency and reliability of the fixed ball valve. The lack of this system will not only increase maintenance costs, but may also cause performance problems and potential safety risks in operation.

[0005] For this reason, we propose a fixed hard-sealed ball valve. Utility Model Content

[0006] The utility model provides a fixed hard-sealed ball valve, which can avoid direct metal contact between a valve stem and a valve stem sleeve.

[0007] To achieve the above-mentioned purpose, a fixed hard-sealed ball valve is provided, which includes an electric actuator, a first connecting plate threadedly connected to the bottom end of the electric actuator, a valve stem sleeve fixedly connected to the bottom end of the first connecting plate, a valve body threadedly connected to the bottom end of the valve stem sleeve, a second connecting plate threadedly connected to the outer surface of one side of the first connecting plate, a lubrication system fixedly connected to the outer surface of the second connecting plate away from the first connecting plate, the lubrication system including a regulating valve, a tank cap, a tank, an oil outlet, an oil pipe, an oil hole, and an oil channel, an oil filling port is provided at the top of the tank, a tank cap is installed on the outer surface of the oil filling port, an oil outlet is provided at the bottom end of the tank, an oil pipe is installed at the bottom end of the oil outlet, a regulating valve is provided on the outer surface of the oil pipe, an end of the oil pipe away from the oil outlet is fixedly connected to the oil hole, the oil hole is fixedly connected to the outer surface of the valve stem sleeve, an oil channel is opened inside the valve stem sleeve, and the oil channel extends along the height direction of the valve stem sleeve.

[0008] According to the fixed hard-sealed ball valve, the regulating valve includes a valve disc, a knob, a regulating valve body, a second valve stem, an upper sleeve, and a lower sleeve. The top end of the regulating valve body is movably connected to the knob, the bottom end of the knob is fixedly connected to the second valve stem, the outer surface of the second valve stem is fixedly connected to the valve disc, and the outer surface of the second valve stem is movably connected to the upper sleeve and the lower sleeve.

[0009] According to the fixed hard-sealed ball valve, the lower sleeve is installed at the lower part of the regulating valve body, and the upper sleeve is installed in the middle of the regulating valve body.

[0010] According to the fixed hard-sealed ball valve, the outer surfaces of the second valve stem and the upper sleeve are evenly provided with an annular groove along the circumference thereof, and an O-ring is installed in the annular groove.

[0011] According to the fixed hard-sealed ball valve, a first valve stem is installed at the output end of the electric actuator, a sphere is fixedly connected to one end of the first valve stem away from the electric actuator, and valve seats are movably connected to both sides of the sphere.

[0012] According to the fixed hard-sealed ball valve, a lower bearing and an upper bearing are installed on the outer surface of the first valve stem, and a bearing seat is opened at the upper and lower parts of the valve body. The upper bearing is installed on the upper bearing seat opened inside the valve body, and the lower bearing is installed on the lower bearing seat opened inside the valve body.

[0013] According to the fixed hard-sealed ball valve, a plurality of screw holes are provided on the outer surfaces of both sides of the valve body, a through hole is provided at the center of the first connecting plate, and the diameter of the through hole is consistent with that of the first valve stem.

[0014] The beneficial effects of the utility model are as follows: lubricating oil is provided between the first valve stem and the valve stem sleeve through the oil tank, oil outlet, oil pipe and oil hole in the lubrication system, thereby effectively reducing the friction and wear between the first valve stem and the valve stem sleeve. This friction reduction effect helps to extend the service life of the valve and its components. Lower friction means that less energy is required to move the same parts, making the entire system more economical and efficient. Good lubrication not only reduces friction, but also helps maintain the smooth operation of the equipment. By preventing direct metal contact between components, the lubrication system helps to reduce vibration and noise during operation, thereby improving the smoothness and quietness of the operation. By configuring the regulating valve, users can adjust the oil flow rate as needed to adapt to different working conditions and needs. This adjustment function makes the lubrication system more flexible and adaptable, and can perform precise lubrication according to actual operating conditions. The setting of the oil tank cover and the oil filling port makes the replenishment and replacement of the lubricating oil simple and quick. Users can easily perform regular maintenance to ensure that the quality and quantity of the lubricating oil meet the work needs, thereby ensuring the long-term and efficient operation of the equipment. A good lubrication system reduces energy waste and early damage to components caused by friction, reduces the frequency of repair and replacement of components, thereby reducing material consumption and energy expenses, which is beneficial to both the environment and the economy.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 It is a cross-sectional view of the fixed hard-sealed ball valve of the utility model;

[0018] Figure 2 This is an enlarged view of the lubrication system of the fixed hard-sealed ball valve of the utility model;

[0019] Figure 3 It is a three-dimensional diagram of the fixed hard-sealed ball valve of the utility model;

[0020] Figure 4 It is a cross-sectional view of a regulating valve of a fixed hard-sealed ball valve of the utility model.

[0021] Legend:

[0022] 1. Electric actuator; 2. Valve body; 3. Lubrication system; 4. Control valve; 5. First connecting plate; 6. Valve seat; 7. Ball; 8. Lower bearing; 9. Upper bearing; 10. First valve stem; 11. Screw hole; 12. Valve stem sleeve; 13. Oil tank cap; 14. Oil tank; 15. Oil outlet; 16. Oil pipe; 17. Valve disc; 18. Oil hole; 19. Oil channel; 20. Second connecting plate; 21. Knob; 22. Control valve body; 23. Second valve stem; 24. Upper bushing; 25. Lower bushing. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] Example

[0025] Reference Figures 1 to 4 The utility model embodiment of a fixed hard-sealed ball valve includes an electric actuator 1, the bottom end of the electric actuator 1 is threadedly connected to a first connecting plate 5, the bottom end of the first connecting plate 5 is fixedly connected to a valve stem sleeve 12, the bottom end of the valve stem sleeve 12 is threadedly connected to a valve body 2, one side outer surface of the first connecting plate 5 is threadedly connected to a second connecting plate 20, the second connecting plate 20 is fixedly connected to a lubrication system 3 on the outer surface of a side away from the first connecting plate 5, the lubrication system 3 includes a regulating valve 4, a tank cap 13, a tank 14, an oil outlet 15, an oil pipe 16, an oil hole 18, and an oil channel 19, the top of the tank 14 is provided with an oil filling port, the outer surface of the oil filling port is installed with the tank cap 13, and the bottom of the tank 14 is provided with An oil outlet 15 is provided with an oil pipe 16 at the bottom end of the oil outlet 15, a regulating valve 4 is provided on the outer surface of the oil pipe 16, an end of the oil pipe 16 away from the oil outlet 15 is fixedly connected with an oil hole 18, the oil hole 18 is fixedly connected to the outer surface of the valve stem sleeve 12, an oil passage 19 is opened inside the valve stem sleeve 12, and the oil passage 19 extends along the height direction of the valve stem sleeve 12. The lubrication system 3 adopts high-viscosity synthetic lubricating oil, which can maintain good lubrication performance at extreme temperatures, thereby reducing friction and wear, and extending the service life of the valve stem sleeve 12 and the valve body 2. The design of the lubrication system 3 allows oil replenishment and replacement without stopping the machine, thereby improving the maintenance efficiency and the reliability of equipment operation.

[0026] The regulating valve 4 includes a valve disc 17, a knob 21, a regulating valve body 22, a second valve stem 23, an upper shaft sleeve 24, and a lower shaft sleeve 25. The top end of the regulating valve body 22 is movably connected to the knob 21, the bottom end of the knob 21 is fixedly connected to the second valve stem 23, the outer surface of the second valve stem 23 is fixedly connected to the valve disc 17, the outer surface of the second valve stem 23 is movably connected to the upper shaft sleeve 24 and the lower shaft sleeve 25, and the knob 21 is made of wear-resistant plastic material to ensure that the regulating valve can maintain good operating feel and durability even under frequent operation.

[0027] The lower sleeve 25 is installed at the lower part of the regulating valve body 22, and the upper sleeve 24 is installed in the middle part of the regulating valve body 22. The upper sleeve 24 and the lower sleeve 25 are made of copper alloy material to increase sliding smoothness and wear resistance, thereby improving the overall response speed and accuracy of the regulating valve.

[0028] The outer surface of the second valve stem 23 and the upper sleeve 24 is evenly provided with an annular groove along its circumference, and an O-ring is installed in the annular groove. The design of the annular groove helps to maintain the sealing performance of the O-ring in harsh environments and prevent liquid or gas leakage, thereby ensuring efficient operation of the system.

[0029] A first valve stem 10 is installed at the output end of the electric actuator 1 , and a ball 7 is fixedly connected to one end of the first valve stem 10 away from the electric actuator 1 , and valve seats 6 are movably connected to both sides of the ball 7 .

[0030] A lower bearing 8 and an upper bearing 9 are installed on the outer surface of the first valve stem 10. A bearing seat is opened at the upper and lower parts of the valve body 2. The upper bearing 9 is installed in the upper bearing seat opened in the valve body 2, and the lower bearing 8 is installed in the lower bearing seat opened in the valve body 2. The upper bearing 9 and the lower bearing 8 are self-lubricating bearings, which can reduce maintenance requirements and extend the service life of the bearings, which is especially important in an environment where regular maintenance is not possible.

[0031] Multiple screw holes 11 are provided on the outer surfaces of both sides of the valve body 2, and a through hole is provided in the center of the first connecting plate 5, the diameter of the through hole is consistent with the first valve stem 10, and the screw hole 11 adopts an enhanced thread design to improve the stability and load-bearing capacity of the connection, which is particularly suitable for use in high vibration environments, ensuring that the valve body and the connecting plate are tightly fixed.

[0032] Working principle: First, fix the valve body 2 through multiple screw holes 11, then start the electric actuator 1, and the electric actuator 1 drives the ball 7 to rotate through the first valve stem 10 at its output end. When the ball 7 rotates, it will change the flow path of the fluid and complete the switch operation of the valve. The oil tank 14 in the lubrication system 3 is the main container for storing lubricating oil. An oil filling port 15 is provided at the bottom of the oil tank, which is closed by an oil tank cover 13 installed on the outer surface. The oil tank cover 13 ensures that the lubricating oil inside the oil tank is not polluted by the outside world, and is convenient for users to open it to replenish or replace the oil. An oil outlet 15 is provided at the bottom of the oil tank for the output of lubricating oil. The oil outlet 15 is connected to an oil pipe 16, and the oil pipe 16 is used as a lubricating oil. The transmission channel transports the lubricating oil in the oil tank 14 to the oil channel 19 in the valve stem sleeve 12. The oil pipe 16 is equipped with a regulating valve 4. The user can drive the second valve stem 23 to rotate in the upper sleeve 24 and the lower sleeve 25 by rotating the knob 21, so as to adjust the opening and closing degree of the valve disc 17, so as to control the oil flow through the oil pipe 16. The far end of the oil pipe 16 is fixedly connected with an oil hole 18. The oil hole 18 is the interface for the lubricating oil to be output from the oil pipe 16 to the valve stem sleeve 12. An oil channel 19 is provided inside the valve stem sleeve 12. This is an internal channel extending along the height direction of the valve stem sleeve 12, which is used to evenly distribute the lubricating oil to the entire working surface of the inner wall of the valve stem sleeve 12 to ensure that the entire rotating area is fully lubricated.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A fixed hard-sealed ball valve, comprising an electric actuator (1), characterized in that: The bottom end of the electric actuator (1) is threadedly connected to a first connecting plate (5), the bottom end of the first connecting plate (5) is fixedly connected to a valve stem sleeve (12), the bottom end of the valve stem sleeve (12) is threadedly connected to a valve body (2), one side outer surface of the first connecting plate (5) is threadedly connected to a second connecting plate (20), the side outer surface of the second connecting plate (20) away from the first connecting plate (5) is fixedly connected to a lubrication system (3), the lubrication system (3) comprises a regulating valve (4), an oil tank cap (13), an oil tank (14), an oil outlet (15), an oil pipe (16), an oil hole (18), an oil passage (19), ), the top of the oil tank (14) is provided with an oil filling port, the outer surface of the oil filling port is installed with an oil tank cover (13), the bottom end of the oil tank (14) is provided with an oil outlet (15), the bottom end of the oil outlet (15) is installed with an oil pipe (16), the outer surface of the oil pipe (16) is provided with a regulating valve (4), the end of the oil pipe (16) away from the oil outlet (15) is fixedly connected with an oil hole (18), the oil hole (18) is fixedly connected to the outer surface of the valve stem sleeve (12), the interior of the valve stem sleeve (12) is provided with an oil passage (19), and the oil passage (19) extends along the height direction of the valve stem sleeve (12).

2. The fixed hard-sealed ball valve according to claim 1, characterized in that: The regulating valve (4) comprises a valve flap (17), a knob (21), a regulating valve body (22), a second valve stem (23), an upper shaft sleeve (24), and a lower shaft sleeve (25); the top end of the regulating valve body (22) is movably connected to the knob (21); the bottom end of the knob (21) is fixedly connected to the second valve stem (23); the outer surface of the second valve stem (23) is fixedly connected to the valve flap (17); and the outer surface of the second valve stem (23) is movably connected to the upper shaft sleeve (24) and the lower shaft sleeve (25).

3. The fixed hard-sealed ball valve according to claim 2, characterized in that: The lower shaft sleeve (25) is installed at the lower part of the regulating valve body (22), and the upper shaft sleeve (24) is installed at the middle part of the regulating valve body (22).

4. The fixed hard-sealed ball valve according to claim 2, characterized in that: The outer surfaces of the second valve stem (23) and the upper sleeve (24) are evenly provided with an annular groove along their circumference, and an O-ring is installed in the annular groove.

5. The fixed hard-sealed ball valve according to claim 1, characterized in that: A first valve stem (10) is installed at the output end of the electric actuator (1); an end of the first valve stem (10) away from the electric actuator (1) is fixedly connected to a ball (7); and valve seats (6) are movably connected to both sides of the ball (7).

6. The fixed hard-sealed ball valve according to claim 5, characterized in that: A lower bearing (8) and an upper bearing (9) are installed on the outer surface of the first valve stem (10); a bearing seat is opened at the upper and lower parts of the valve body (2); the upper bearing (9) is installed on the upper bearing seat opened inside the valve body (2); and the lower bearing (8) is installed on the lower bearing seat opened inside the valve body (2).

7. The fixed hard-sealed ball valve according to claim 1, characterized in that: The outer surfaces of both sides of the valve body (2) are provided with a plurality of screw holes (11), and the center of the first connecting plate (5) is provided with a through hole, the diameter of the through hole being consistent with that of the first valve stem (10).

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