High-pressure ball valve sealing device

Abstract

The utility model belongs to the technical field of ball valves, and particularly relates to a high-pressure ball valve sealing device which comprises a lubricating pipe, a through hole is formed in the lubricating pipe, a U-shaped pipe is connected to the outer wall of the lubricating pipe, a connecting pipe is connected to the middle end of the U-shaped pipe, a rod barrel is connected to one end of the connecting pipe, a movable rod is slidably installed at one end of the rod barrel in a penetrating mode, and a piston is fixedly connected to one end of the movable rod. A connecting plate is fixed to the other end of the movable rod, a telescopic rod is connected to the outer wall of the U-shaped pipe, the telescopic rod is opened, the acting end of the telescopic rod drives the connecting plate to move, and therefore the movable rod and the piston can be driven to reciprocate in the rod barrel, and in the telescopic rod shortening process, the piston can convey lubricating oil in the rod barrel into the lubricating pipe through the U-shaped pipe; and finally, the lubricating oil flows into the surface of the valve element through the through hole, so that the lubricating oil is uniformly smeared on the surface of the valve element, the friction force between the valve body and the valve element is reduced, and the sealing performance between the valve element and the valve body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a sealing device for a high-pressure ball valve. Background Art

[0002] A high-pressure ball valve is a valve used to control the flow of high-pressure fluid media. During the installation of an oil pipeline, a high-pressure ball valve is required to facilitate the control of the flow of oil.

[0003] A Chinese patent with announcement number CN116538316A discloses a high-pressure ball valve, including a main valve body, wherein the main valve body and the auxiliary valve body are laterally connected, and a first connection is provided between the main valve body and the auxiliary valve body, and a first metal winding gasket is provided at the first connection; there are two valve seats and they are respectively arranged in the main valve body and the auxiliary valve body, and the ball is located between the two valve seats, and the lower end of the valve stem is fixedly connected to the ball, and a boss is provided at the lower end of the valve stem, and the side wall of the boss is rotatably matched with the main valve body; a high-pressure ball valve provided by the present invention solves the problem that the existing ball valve is easily damaged under high pressure and high pressure difference working conditions.

[0004] However, the above-mentioned high-pressure ball valve still has some problems. In practical applications, after long-term use, the sealing performance between the valve body and the valve core will be reduced due to the continuous friction between the valve body and the valve core, which will cause leakage of the medium and affect the control of oil flow. Therefore, a high-pressure ball valve sealing device is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve the problems raised in the background technology, the utility model proposes a high-pressure ball valve sealing device.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a high-pressure ball valve sealing device described in the utility model comprises a valve body, a lubrication assembly is installed inside the valve body, the lubrication assembly comprises two lubrication pipes, the lubrication pipes are symmetrically installed inside the valve body, a plurality of through holes are equidistantly opened inside the lubrication pipes, a U-shaped pipe is connected on the outer wall between the lubrication pipes, the middle end of the U-shaped pipe is connected to a connecting pipe, one end of the connecting pipe is connected to a rod barrel, a movable rod is slidably installed through one end of the rod barrel, a piston is fixedly connected to one end of the movable rod, the radius of the piston is equal to the inner diameter of the rod barrel, the other end of the movable rod is fixedly installed with a connecting plate, a telescopic rod is connected to the outer wall of the U-shaped pipe, the active end of the telescopic rod is fixedly installed on one side of the connecting plate, the lubricating oil can be evenly applied to the surface of the valve core, the friction between the valve body and the valve core is reduced, and the sealing performance between the valve core and the valve body is improved.

[0007] Preferably, one side of the rod barrel is connected to an oil inlet pipe, one end of the oil inlet pipe is fixedly connected to a tension spring, one side of the tension spring is connected to a blocking ball, the middle end of the oil inlet pipe is equipped with a spherical cavity, and the blocking ball is installed inside the spherical cavity, which can automatically control the oil inlet amount, thereby ensuring the lubrication effect and avoiding waste.

[0008] Preferably, the radius of the blocking ball is larger than the diameter of the oil inlet pipe and smaller than the inner diameter of the spherical cavity, so as to facilitate the control of the oil inlet of the lubricating oil.

[0009] Preferably, a slide groove is opened inside one end of the valve body, the slide groove is connected to the interior of the valve body, a slider is slidably installed inside the slide groove, a return spring is fixedly connected between the slider and the slide groove, a support rod is fixedly connected to the top side of the slider, a floating plate is installed on the top side of the support rod, and a pressure sensor is installed on the inner wall of one side of the slide groove, which is convenient for detecting whether there is fluid passing through when the ball valve is not operating, thereby realizing the sealing detection of the valve body.

[0010] Preferably, a valve core is movably installed inside the middle end of the valve body, the valve core is fitted with a lubrication tube, a valve stem is installed on the top side of the valve core, one end of the valve stem rotates through the outside of the valve body and is fixed with a handwheel, so that the opening and closing state of the valve can be conveniently controlled.

[0011] Preferably, the pressure sensor is electrically connected to the controller in the valve body, wherein the pressure sensor is used to detect the pressure of the slider to achieve intelligent control and improve the safety and reliability of the device.

[0012] The utility model is beneficial in that:

[0013] 1. The utility model opens the telescopic rod so that the action end drives the connecting plate to move, thereby driving the movable rod and the piston to reciprocate inside the rod barrel. During the shortening of the telescopic rod, the piston transports the lubricating oil inside the rod barrel to the lubricating pipe through the U-shaped pipe, and finally flows into the surface of the valve core through the through hole, so that the lubricating oil can be evenly applied to the surface of the valve core, reducing the friction between the valve body and the valve core, and improving the sealing performance between the valve core and the valve body;

[0014] 2. When the ball valve of the utility model is no longer in operation, when medium flows through the valve body, the float plate will be driven by the buoyancy of the medium to drive the support rod and the slider to slide in the slide groove. The movement of the slider will generate a small pressure on the pressure sensor. The controller receives and processes the electrical signal sent by the pressure sensor, and determines the sealing performance of the valve body according to the change in pressure, which is convenient for detecting whether there is fluid passing through when the ball valve is not in operation, thereby realizing the sealing detection of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 This is a schematic diagram of the structure of the medium axis side view of the utility model;

[0017] Figure 2 Schematic diagram of the internal structure of the valve body;

[0018] Figure 3 It is a schematic diagram of the structure of the sealing and lubrication assembly;

[0019] Figure 4 for Figure 3 The enlarged structural diagram of part A in the middle;

[0020] Figure 5 This is a schematic diagram of the seal detection component structure.

[0021] In the figure: 1. valve body; 2. lubrication pipe; 3. through hole; 4. U-shaped pipe; 5. connecting pipe; 6. rod barrel; 7. movable rod; 8. piston; 9. connecting plate; 10. telescopic rod; 11. oil inlet pipe; 12. tension spring; 13. ball blocking; 14. slide groove; 15. slider; 16. support rod; 17. floating plate; 18. pressure sensor; 19. valve core; 20. valve stem; 21. hand wheel; 22. reset spring. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-4As shown, a high-pressure ball valve sealing device comprises a valve body 1, wherein a lubrication assembly is installed inside the valve body 1, wherein the lubrication assembly comprises two lubrication pipes 2, wherein the lubrication pipes 2 are symmetrically installed inside the valve body 1, wherein a plurality of through holes 3 are evenly spaced inside the lubrication pipes 2, wherein a U-shaped pipe 4 is connected to the outer wall between the lubrication pipes 2, wherein a connecting pipe 5 is connected to the middle end of the U-shaped pipe 4, wherein one end of the connecting pipe 5 is connected to a rod barrel 6, wherein one end of the rod barrel 6 is penetrated by a movable rod 7 which is slidably installed, wherein the movable rod 7 is A piston 8 is fixedly connected to one end, and the radius of the piston 8 is equal to the inner diameter of the rod barrel 6. The other end of the movable rod 7 is fixedly installed with a connecting plate 9. A telescopic rod 10 is connected to the outer wall of the U-shaped tube 4, and the active end of the telescopic rod 10 is fixedly installed on one side of the connecting plate 9. A valve core 19 is movably installed inside the middle end of the valve body 1. The valve core 19 is fitted with the lubrication pipe 2. A valve stem 20 is installed on the top side of the valve core 19. One end of the valve stem 20 rotates and penetrates to the outside of the valve body 1 and is fixed with a hand wheel 21;

[0024] One side of the rod barrel 6 is connected to an oil inlet pipe 11, one end of the oil inlet pipe 11 is fixedly connected to a tension spring 12, one side of the tension spring 12 is connected to a blocking ball 13, the middle end of the oil inlet pipe 11 is equipped with a spherical cavity, and the blocking ball 13 is installed in the spherical cavity; when working, in actual application, after long-term use of the high-pressure ball valve, due to the continuous friction between the valve body 1 and the valve core 19, the sealing performance between the valve body 1 and the valve core 19 will be reduced, which will cause leakage of the medium and affect the control of the flow of oil. When the valve needs to be operated, by turning the hand wheel 21, the valve stem 20 and the valve core 19 can be driven to rotate accordingly, and the rotation of the valve core 19 makes the valve open or close, thereby controlling the on-off of the fluid;

[0025] When the lubrication assembly needs to be used, the telescopic rod 10 is opened so that its active end drives the connecting plate 9 to move, thereby driving the movable rod 7 and the piston 8 to reciprocate inside the rod barrel 6. When the active end of the telescopic rod 10 is extended, the pressure in the oil inlet pipe 11 increases, and the blocking ball 13 will be pushed to the depth of the spherical cavity, thereby opening the oil inlet and allowing the lubricating oil to enter the rod barrel 6. When the active end of the telescopic rod 10 is shortened and the pressure in the oil inlet pipe 11 decreases, the tension spring 12 will push the blocking ball 13 back to its original position and close the oil inlet, thereby automatically controlling the amount of lubricating oil entering. At the same time, during the shortening of the telescopic rod 10, the piston 8 will transport the lubricating oil inside the rod barrel 6 through the connecting pipe 5 to the inside of the U-shaped tube 4, and then transport it to the lubrication tube 2 through the U-shaped tube 4, and finally flow into the surface of the valve core 19 through the through hole 3, so that the lubricating oil can be evenly applied to the surface of the valve core 19, reducing the friction between the valve body 1 and the valve core 19, and improving the sealing performance between the valve core 19 and the valve body 1.

[0026] See also Figure 1 , 2As shown in Figures 5 and 6, a slide groove 14 is provided inside one end of the valve body 1, and the slide groove 14 is connected to the inside of the valve body 1, a slider 15 is slidably installed inside the slide groove 14, a return spring 22 is fixedly connected between the slider 15 and the slide groove 14, a support rod 16 is fixedly connected to the top side of the slider 15, a floating plate 17 is installed on the top side of the support rod 16, and a pressure sensor 18 is installed on the inner wall of one side of the slide groove 14;

[0027] The pressure sensor 18 is electrically connected to the controller in the valve body 1, wherein the pressure sensor 18 is used to detect the pressure of the slider 15; when working, the high-pressure ball valve is a valve used to control the flow of high-pressure fluid medium. During the installation of the oil pipeline, in order to facilitate the control of the flow of oil, a high-pressure ball valve is required. When the ball valve is no longer in operation, if there is no leakage in the ball valve and no fluid flows from the valve body 1, the slider 15 will not contact the pressure sensor 18. If the ball valve is no longer in operation, when medium flows through the valve body 1, the floating plate 17 will be driven by the buoyancy of the medium to drive the support rod 16 and the slider 15 in the slide groove 14, the movement of the slider 15 will generate a small pressure on the pressure sensor 18, and convert the pressure signal into an electrical signal and transmit it to the controller in the valve body 1. The controller receives and processes the electrical signal sent by the pressure sensor 18, and judges the sealing performance of the valve body 1 according to the pressure change. If the slider 15 exerts a large pressure on the pressure sensor 18 when the valve body 1 is in operation, the controller will not make a judgment. The reset spring 22 helps the slider 15 to automatically reset within a certain range, which is convenient for detecting whether there is fluid passing when the ball valve is not in operation, thereby realizing the sealing detection of the valve body 1. The specific model of the pressure sensor 18 is DATA-51.

[0028] Working principle: when the valve needs to be operated, the hand wheel 21 is turned to drive the valve stem 20 and the valve core 19 to rotate accordingly. The rotation of the valve core 19 opens or closes the valve, thereby controlling the flow of the fluid.

[0029] When the lubrication assembly needs to be used, the telescopic rod 10 is opened so that its active end drives the connecting plate 9 to move, thereby driving the movable rod 7 and the piston 8 to reciprocate inside the rod barrel 6. When the active end of the telescopic rod 10 is extended, the pressure in the oil inlet pipe 11 increases, and the blocking ball 13 is pushed to the depth of the spherical cavity, thereby opening the oil inlet port and allowing the lubricating oil to enter the rod barrel 6. When the active end of the telescopic rod 10 is shortened, the pressure in the oil inlet pipe 11 decreases, and the tension spring 12 pushes the blocking ball 13 back to its original position, closing the oil inlet port, thereby automatically controlling the amount of lubricating oil inlet. At the same time, during the shortening process of the telescopic rod 10, the piston 8 will transport the lubricating oil inside the rod barrel 6 through the connecting pipe 5 to the inside of the U-shaped tube 4, and then transport it to the lubrication pipe 2 through the U-shaped tube 4, and finally flow into the surface of the valve core 19 through the through hole 3, so that the lubricating oil can be evenly applied to the surface of the valve core 19, reducing the friction between the valve body 1 and the valve core 19, and improving the sealing performance between the valve core 19 and the valve body 1.

[0030] When the ball valve is no longer in operation, if there is no leakage in the ball valve and no fluid flows from the valve body 1, the slider 15 will not contact the pressure sensor 18. If the ball valve is no longer in operation, when medium flows through the valve body 1, the float plate 17 will be driven by the buoyancy of the medium to drive the support rod 16 and the slider 15 to slide in the slide groove 14. The movement of the slider 15 will generate a small pressure on the pressure sensor 18, and convert the pressure signal into an electrical signal and transmit it to the controller in the valve body 1. The controller receives and processes the electrical signal sent by the pressure sensor 18, and judges the sealing performance of the valve body 1 according to the change in pressure. If the valve body 1 is in operation, the slider 15 exerts a large pressure on the pressure sensor 18, and the controller will not make a judgment. The reset spring 22 helps the slider 15 to automatically reset within a certain range, which is convenient for detecting whether there is fluid passing when the ball valve is not in operation, thereby realizing the sealing detection of the valve body 1.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A high pressure ball valve sealing device, characterized in that: The invention comprises a valve body (1), wherein a lubrication assembly is installed inside the valve body (1), wherein the lubrication assembly comprises two lubrication pipes (2), wherein the lubrication pipes (2) are symmetrically installed inside the valve body (1), wherein a plurality of through holes (3) are evenly spaced inside the lubrication pipes (2), wherein a U-shaped pipe (4) is connected to the outer wall between the lubrication pipes (2), wherein the middle end of the U-shaped pipe (4) is connected to a connecting pipe (5), wherein one end of the connecting pipe (5) is connected to a rod barrel (6), wherein a movable rod (7) is slidably installed through one end of the rod barrel (6), wherein one end of the movable rod (7) is fixedly connected to a piston (8), wherein the radius of the piston (8) is equal to the inner diameter of the rod barrel (6), wherein the other end of the movable rod (7) is fixedly installed to a connecting plate (9), wherein a telescopic rod (10) is connected to the outer wall of the U-shaped pipe (4), wherein the active end of the telescopic rod (10) is fixedly installed on one side of the connecting plate (9).

2. A high pressure ball valve sealing device according to claim 1, characterized in that: One side of the rod barrel (6) is connected to an oil inlet pipe (11), one end of the oil inlet pipe (11) is fixedly connected to a tension spring (12), one side of the tension spring (12) is connected to a blocking ball (13), the middle end of the oil inlet pipe (11) is equipped with a spherical cavity, and the blocking ball (13) is installed inside the spherical cavity.

3. A high pressure ball valve sealing device according to claim 2, characterized in that: The radius of the blocking ball (13) is greater than the diameter of the oil inlet pipe (11) and smaller than the inner diameter of the spherical cavity.

4. A high pressure ball valve sealing device according to claim 3, characterized in that: A slide groove (14) is provided inside one end of the valve body (1), and the slide groove (14) is connected to the inside of the valve body (1). A slider (15) is slidably installed inside the slide groove (14), and a return spring (22) is fixedly connected between the slider (15) and the slide groove (14). A support rod (16) is fixedly connected to the top side of the slider (15), and a floating plate (17) is installed on the top side of the support rod (16). A pressure sensor (18) is installed on the inner wall of one side of the slide groove (14).

5. A high pressure ball valve sealing device according to claim 4, characterized in that: A valve core (19) is movably installed inside the middle end of the valve body (1), and the valve core (19) is arranged in close contact with the lubrication pipe (2). A valve stem (20) is installed on the top side of the valve core (19), and one end of the valve stem (20) rotates to penetrate the outside of the valve body (1) and is fixed with a hand wheel (21).

6. A high pressure ball valve sealing device according to claim 5, characterized in that: The pressure sensor (18) is electrically connected to a controller in the valve body (1), wherein the pressure sensor (18) is used to detect the pressure of the slider (15).

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