Corrugated pipe sealing ball valve with light torque structure

Abstract

The invention relates to the technical field of ball valve driving, in particular to a corrugated pipe sealing ball valve with a light torque structure, which comprises a valve body, an action assembly, an auxiliary assembly and a valve rod movably mounted on a valve core of the valve body, the valve rod is used for being connected with a spherical valve core in the valve body, and the action assembly is arranged at the top of the valve rod. Through the cooperation between the action assembly and the auxiliary assembly, stronger torque can be provided for the valve rod of the ball valve, the valve rod is helped to act quickly, so that quick starting is achieved, the opening and closing speed of the valve body is effectively increased, the working pressure needed by hydraulic pressure is reduced, and the sealing cost is reduced; the valve core can be locked when the valve rod is quickly lifted and the valve core is completely opened, so that the stability is provided for the valve body.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valve driving, and particularly relates to a bellows sealed ball valve with a torque-light structure. Background Art

[0002] Bellows ball valves are commonly used in occasions where strict requirements are imposed on the valve stem seal, such as in high-vacuum applications and the nuclear industry. A bellows is used to replace or be used in combination with the stuffing box on a conventional valve. The core of the ball valve lies in the spherical body located at the valve core position. This sphere can close and open the valve body. After the sphere rotates and rises a certain height, the valve body is opened. After the sphere rotates and descends a certain height, the valve body is closed and a sealing effect is formed.

[0003] The existing Chinese patent with the publication number CN118009082A discloses a double-sealed pneumatic ball valve, which relates to the technical field of pneumatic ball valves. It includes a valve seat and an actuator connected above the valve seat. A valve core is rotatably arranged in the valve seat, and a valve stem connected to the valve core is rotatably connected to the top of the valve seat. Both ends of the box body are respectively connected with a left end cover and a right end cover. A first piston and a second piston are hermetically connected in the box body. Rack teeth are symmetrically arranged inside the first piston and the second piston. A rotating shaft is rotatably connected to the bottom of the box body, and the bottom of the rotating shaft is fixedly connected to the valve stem. A gear meshing with the two rack teeth is arranged at the top of the rotating shaft. Bases are arranged inside both the left end cover and the right end cover. A first air intake unit is arranged in the base on the left end cover, and a second air intake unit is arranged in the base on the right end cover. When gases from the same air source enter the box body through the first air intake unit and the second air intake unit, the air pressures are the same. This invention ensures that the air pressures entering the box body are the same, avoiding the problem of inconsistent piston thrust caused by uneven air pressures.

[0004] The above technical solution ensures the same intake air pressures on both sides by arranging multiple mechanical components, and thus ensures the same piston thrust on both sides. In the prior art, during the operation of a sealed ball valve, the pressure in the pipeline will impede the rotation of the ball valve core. Due to the shape characteristics of its valve core, the ball valve needs to rotate relatively quickly to achieve stable opening and closing. Therefore, it is necessary to improve the stability and working efficiency of the ball valve. Summary of the Invention

[0005] Aiming at the above-mentioned drawbacks of the prior art, the present invention provides a bellows sealed ball valve with a torque-light structure, which can effectively solve the problem of how to improve the working efficiency of a ball valve in the prior art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: The present invention provides a bellows sealed ball valve with a torque-light structure, including a valve body, an actuating assembly, an auxiliary assembly, and a valve stem movably installed on the valve core of the valve body. The valve stem is used to connect the spherical valve core in the valve body, and the actuating assembly is arranged at the top of the valve stem; The action component includes a fixed box, and the fixed box includes hydraulic cylinders fixedly installed through both sides of the fixed box. Two pressure guiding pipes are fixedly connected through the side walls of the two hydraulic cylinders. The two pressure guiding pipes on the same hydraulic cylinder are respectively an input pipe and an output pipe. A piston is slidably connected in the hydraulic cylinder. The hydraulic cylinder is divided into two spaces by the piston, and both spaces are filled with liquid. One side of the piston is fixedly connected with a moving frame through a round rod. An inclined rack is fixedly connected to the moving frame, and an inclined gear matching the inclined rack is fixedly sleeved on the valve rod; The auxiliary component includes a columnar shell located above the action component. A communicating pipe is fixedly connected through both the columnar shell and the hydraulic cylinder. The communicating pipe communicates a part of the space of the hydraulic cylinder with the space of the columnar shell.

[0007] Further, an electromagnet is fixedly connected to the inner wall of the bottom plate of the columnar shell. A magnetic force receiving disk is fixedly connected to the top end of the valve rod. The magnetic force receiving disk is affected by the magnetic force of the electromagnet, and one end of the communicating pipe is located between the electromagnet and the magnetic force receiving disk.

[0008] Further, an annular magnet is fixedly installed in the bottom of the magnetic force receiving disk. A plurality of rotating plates are rotatably installed obliquely on the magnetic force receiving disk, and a torsion spring is arranged between the rotating plate and the magnetic force receiving disk.

[0009] Further, a plurality of fixed columns are fixedly installed on the inner wall top of the columnar shell. A plurality of limit columns are fixedly connected to the top of the magnetic force receiving disk corresponding to the positions of the rotating plates. When the limit columns move to the positions above the columnar shell, their positions will be restricted by the fixed columns.

[0010] Further, sealing rubber pads are fixedly connected to the top and bottom of the magnetic force receiving disk corresponding to the positions of the rotating plates. The top of the rotating plate has a plate-like structure that can contact the fixed column, and the bottom of the rotating plate has a force receiving magnetic strip affected by the magnetic force of the electromagnet.

[0011] Further, limit frames are fixedly installed on both the inner wall top and bottom of the fixed box, and the limit frames are used to limit the sliding position of the moving frame.

[0012] Further, a bar magnet is slidably connected to the bottom plate of the columnar shell. The bar magnet is affected by the magnetic force of the electromagnet. A connecting frame is fixedly connected to the bottom of the bar magnet, and an inclined block is slidably connected in the connecting frame through a spring.

[0013] Further, a slot for the connecting frame to slide is opened on the limit frame on the inner wall top of the fixed box.

[0014] The technical solution provided by the present invention has the following beneficial effects compared with the known public technologies: Through the cooperation between the action component and the auxiliary component, the present invention can provide stronger torque for the valve stem of the ball valve, help the valve stem to act quickly to achieve rapid startup, effectively improve the opening and closing speeds of the valve body, reduce the working pressure required by the hydraulic pressure, reduce the sealing cost, and at the same time cooperate with the electromagnet in the auxiliary component to lock the valve core when the valve stem is quickly lifted and when the valve core is fully opened, providing stability for the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0016] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the present invention; Figure 3 Schematic diagram of the internal structure of the present invention viewed from below; Figure 4 Exploded schematic diagram of the internal structure of the present invention; Figure 5 Schematic diagram of the structure at the magnetic force receiving disk of the present invention; Figure 6 Schematic diagram of the rotating plate of the present invention; Figure 7 Exploded schematic diagram of the action component of the present invention; Figure 8 Schematic diagram of the structure at the bar magnet of the present invention.

[0017] The reference numerals in the drawings respectively represent: 1, valve body; 2, valve stem; 3, action component; 301, fixed box; 302, hydraulic cylinder; 303, pressure guiding pipe; 304, piston; 305, moving frame; 306, inclined rack; 307, inclined gear; 308, limiting frame; 4, auxiliary component; 401, columnar housing; 402, electromagnet; 403, magnetic force receiving disk; 404, rotating plate; 405, limiting column; 406, fixed column; 407, communicating pipe; 408, annular magnet; 409, bar magnet; 410, connecting frame; 411, inclined plane block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] The present invention will be further described below with reference to the embodiments.

[0020] Embodiment:

[0021] Refer to Figures 1 to 8 , a bellows-sealed ball valve with a torque-light structure, including a valve body 1, an actuating assembly 3, an auxiliary assembly 4, and a valve stem 2 movably installed on the spherical valve core in the valve body 1. The valve stem 2 is used to connect the spherical valve core in the valve body 1, and the actuating assembly 3 is arranged at the top of the valve stem 2; The actuating assembly 3 includes a fixed box 301. The fixed box 301 includes hydraulic cylinders 302 fixedly installed through both sides of the fixed box 301. Two pressure guide pipes 303 are fixedly connected through the side walls of the two hydraulic cylinders 302. The two pressure guide pipes 303 on the same hydraulic cylinder 302 are respectively an input pipe and an output pipe. A piston 304 is slidably connected in the hydraulic cylinder 302. The hydraulic cylinder 302 is divided into two spaces by the piston 304, and both spaces are filled with liquid. One side of the piston 304 is fixedly connected with a moving frame 305 through a round rod. An inclined rack 306 is fixedly connected to the moving frame 305, and an inclined gear 307 matching the inclined rack 306 is fixedly sleeved on the valve stem 2; The auxiliary assembly 4 includes a columnar housing 401 located above the actuating assembly 3. A communication pipe 407 is fixedly connected through and common between the columnar housing 401 and the hydraulic cylinder 302. The communication pipe 407 communicates a part of the space of the hydraulic cylinder 302 and the space of the columnar housing 401.

[0022] Specifically, an electromagnet 402 is fixedly connected to the inner wall of the bottom plate of the columnar housing 401. The top end of the valve stem 2 is fixedly connected with a magnetic force receiving disc 403. The magnetic force receiving disc 403 is affected by the magnetic force of the electromagnet 402, and one end of the communication pipe 407 is located between the electromagnet 402 and the magnetic force receiving disc 403.

[0023] The valve body 1 is connected in the pipeline. The spherical valve core of the valve body 1 has a hole for liquid flow. By rotating a certain angle, the opening and closing of the pipeline can be controlled. When it is necessary to control the opening of the pipeline, hydraulic pressure is input inward through the pressure guiding pipe 303 on the hydraulic cylinder 302. Through the transmission of pressure, the piston 304 is pushed towards the valve stem 2. Due to the meshing relationship between the inclined rack 306 and the helical gear 307, during the process of the inclined rack 306 and the piston 304 moving together, the valve stem 2 is driven to rotate, causing the spherical valve core connected to the valve stem 2 to rotate. In the hydraulic cylinder 302, both sides of the piston 304 contain liquid. During the process of the piston 304 moving towards the valve stem 2, the piston 304 will also push the liquid on the other side into the columnar housing 401 through the connecting pipe 407. After the liquid in the two hydraulic cylinders 302 enters the columnar housing 401, the liquid pressure will quickly tend to balance, which helps the two pistons 304 to be evenly pressured, and further balances the torque of the two inclined racks 306 meshing with the helical gear 307, providing a certain stability for the rotation of the valve stem 2. At the same time, the electromagnet 402 is activated. The magnetic force generated by the electromagnet 402 will generate a repulsive force on the magnetic force receiving disk 403. This part of the repulsive force will cause the magnetic force receiving disk 403 to move upward, creating a negative pressure between the electromagnet 402 and the magnetic force receiving disk 403, and helping to suck the liquid squeezed out by the piston 304 to reduce the influence of the liquid on the other side when the piston 304 enters the liquid through the pressure guiding pipe 303. At the same time, the rapid action of the magnetic force can quickly help the liquid enter the columnar housing 401. By sucking the liquid, it helps the piston 304 to move, and thus can improve the sensitivity of the piston 304 to move. The reason is that the transmission of hydraulic pressure will be quickly transmitted when doing work. When the piston 304 can provide a force on both sides, the torque provided by the piston 304 to the inclined rack 306 through the moving frame 305 will increase, and thus the speed of the piston 304's action can be improved. When it is necessary to act, it can be quickly started. When the pressure guiding pipe 303 provides pressure, the hydraulic pressure needs to be large enough to make the piston 304 move quickly. However, too large a hydraulic pressure will bring problems such as sealing and maintenance. The action of the electromagnet 402 is very sensitive under the action of current. With a large enough diameter of the columnar housing 401, when the magnetic force receiving disk 403 rises a certain amount, it can suck enough liquid in the hydraulic cylinder 302, effectively helping the piston 304 to move quickly, and thus quickly rotating the spherical valve core to quickly open the pipeline. At the same time, the required hydraulic power does not need to be too large, and the sealing and maintenance costs can be significantly reduced.

[0024] Meanwhile, due to the characteristics of the ball valve, the valve stem 2 rises together with the magnetic force receiving disc 403, driving the ball valve core to rise a certain distance to achieve the function of opening the pipeline. Conversely, by outputting liquid into the hydraulic cylinder 302 through the pressure guiding pipe 303, the current direction in the electromagnet 402 is changed, causing the electromagnet 402 to generate a magnetic force in the opposite direction to before, making the magnetic force receiving disc 403 descend. The liquid in the magnetic force receiving disc 403 and the electromagnet 402 returns to the hydraulic cylinder 302 again. During this process, the piston 304 resets quickly, and the valve stem 2 rotates while descending, using the ball valve core to form a seal and close the pipeline.

[0025] It should be noted that the diameter of the columnar housing 401 needs to be much larger than the diameter of the hydraulic cylinder 302 to satisfy that the negative pressure volume formed by the short rise of the magnetic force receiving disc 403 in the columnar housing 401 is equal to the volume of the liquid pushed out by the movement of the piston 304 in the two side hydraulic cylinders 302, and at the same time, it also needs to satisfy the requirement of the short rise distance of the valve stem 2.

[0026] Specifically, an annular magnet 408 is fixedly installed by inlaying at the bottom of the magnetic force receiving disc 403. A plurality of rotating plates 404 are installed on the magnetic force receiving disc 403 in an inclined and rotatable manner. A torsion spring is arranged between the rotating plate 404 and the magnetic force receiving disc 403. A plurality of fixed columns 406 are fixedly installed at the top of the inner wall of the columnar housing 401. At the position corresponding to the rotating plate 404 on the top of the magnetic force receiving disc 403, a plurality of limiting columns 405 are fixedly connected. When the limiting column 405 moves to the position above the columnar housing 401, its position will be restricted by the fixed column 406. Sealing rubber pads are fixedly connected to the top and bottom of the magnetic force receiving disc 403 at the position corresponding to the rotating plate 404. The top of the rotating plate 404 has a plate-like structure that can contact the fixed column 406, and the bottom of the rotating plate 404 has a force receiving magnetic strip that is affected by the magnetic force of the electromagnet 402.

[0027] The magnetic force - receiving disc 403 is subjected to overall force. The annular magnet 408 at the bottom of the magnetic force - receiving disc 403 can rise and fall under the magnetic force of the electromagnet 402. When the electromagnet 402 generates a magnetic repulsive force on the rotating plate 404 in an inclined state, a rotating torque is generated on the magnetic force - receiving disc 403. When the electromagnet 402 generates a magnetic repulsive force on the rotating plate 404, that is, when the electromagnet 402 generates a magnetic repulsive force on the annular magnet 408, the magnetic force - receiving disc 403 rises during this process. Liquid enters the hydraulic cylinder 302 through the pressure - guiding pipe 303, and the piston 304 is pushed by the hydraulic pressure. The time of this torque stops when the magnetic force - receiving disc 403 rises to the topmost part inside the columnar housing 401. The torque brought by the rotating plate 404 to the magnetic force - receiving disc 403 helps the valve stem 2 to rotate. At the same time, the rotating rotating plate 404 also helps to stir the liquid between the electromagnet 402 and the magnetic force - receiving disc 403, helps to balance the hydraulic pressure between the two pistons 304, balance the torque received by the valve stem 2, and improve the stability of the rotation of the valve stem 2. When the magnetic force - receiving disc 403 rises to the topmost part of the columnar housing 401, the fixed column 406 will be stuck on the limit column 405, restricting the rotation of the magnetic force - receiving disc 403 to prevent the magnetic force - receiving disc 403 from rotating excessively. At the same time, the electromagnet 402 always maintains a repulsive force on the entire magnetic force - receiving disc 403, making the limit column 405 at the top of the magnetic force - receiving disc 403 and the fixed column 406 fit tightly, forming a certain locking effect to help fix the position of the valve core. And the rotating plate 404 will contact the inner wall of the columnar housing 401 and tend to be in a horizontal state, so that the electromagnet 402 receives sufficient magnetic repulsive force to maintain the height of the magnetic force - receiving disc 403.

[0028] Specifically, limit frames 308 are fixedly installed at the top and bottom of the inner wall of the fixed box 301, and the limit frames 308 are used to limit the sliding position of the moving frame 305.

[0029] Specifically, a bar magnet 409 is slidably connected to the bottom plate of the columnar housing 401. The bar magnet 409 is affected by the magnetic force of the electromagnet 402. A connecting frame 410 is fixedly connected to the bottom of the bar magnet 409. An inclined - face block 411 is slidably connected to the connecting frame 410 through a spring. A slot for the connecting frame 410 to slide is provided on the limit frame 308 at the top of the inner wall of the fixed box 301.

[0030] When the electromagnet 402 generates a magnetic repulsive force on the magnetic force receiving disk 403, the electromagnet 402 also generates a magnetic repulsive force on the bar magnet 409, pushing the bar magnet 409 downward, causing the connecting frame 410 below the bar magnet 409 to descend together, and the inclined plane block 411 will extend below the limit frame 308. During the process of the moving frame 305 moving towards the valve stem 2, the moving frame 305 will generate a thrust on the bottom inclined plane of the inclined plane block 411 and force the inclined plane block 411 to slide upward. After the moving frame 305 completely passes below the inclined plane block 411, the moving frame 305 contacts the side wall of the inclined plane block 411, and the moving direction of the moving frame 305 is restricted by the side wall of the inclined plane block 411, cooperating with the limit post 405 and the fixed post 406 to help lock the position of the moving frame 305, that is, to fix the position of the valve core of the fixed valve body 1. When it is necessary to close the pipeline, the electromagnet 402 will generate a magnetic attractive force on the bar magnet 409. At this time, the bar magnet 409 will be adsorbed upward by the magnetic force receiving disk 403. At this time, the inclined plane block 411 returns above the limit frame 308, making it unable to contact the moving frame 305 and helping the moving frame 305 to reset.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bellows sealed ball valve with a torque-light structure, comprising a valve body (1), an actuating assembly (3), an auxiliary assembly (4), and a valve stem (2) movably mounted on the valve core of the valve body (1). The valve stem (2) is used to connect the spherical valve core in the valve body (1), and is characterized in that, The action component (3) is arranged at the top of the valve stem (2); The action component (3) includes a fixed box (301). The fixed box (301) includes hydraulic cylinders (302) fixedly installed through both sides of the fixed box (301). Two pressure guide pipes (303) are fixedly connected through the side walls of the two hydraulic cylinders (302). The two pressure guide pipes (303) on the same hydraulic cylinder (302) are respectively an input pipe and an output pipe. A piston (304) is slidably connected in the hydraulic cylinder (302). The hydraulic cylinder (302) is divided into two spaces by the piston (304), and both spaces are filled with liquid. One side of the piston (304) is fixedly connected with a moving frame (305) through a round rod. An inclined rack (306) is fixedly connected to the moving frame (305). An inclined gear (307) matching the inclined rack (306) is fixedly sleeved on the valve stem (2); The auxiliary component (4) includes a columnar shell (401) located above the action component (3). A communication pipe (407) is fixedly connected through both the columnar shell (401) and the hydraulic cylinder (302). The communication pipe (407) communicates a part of the space of the hydraulic cylinder (302) with the space of the columnar shell (401).

2. The bellows seal ball valve with a torque-lightening structure according to claim 1, wherein An electromagnet (402) is fixedly connected to the inner wall of the bottom plate of the columnar shell (401). The top end of the valve stem (2) is fixedly connected with a magnetic force receiving disc (403). The magnetic force receiving disc (403) is affected by the magnetic force of the electromagnet (402). One end of the communication pipe (407) is located between the electromagnet (402) and the magnetic force receiving disc (403).

3. The bellows sealed ball valve with a torque-lightening structure according to claim 2, characterized in that, An annular magnet (408) is fixedly installed in the bottom of the magnetic force receiving disc (403). A plurality of rotating plates (404) are tiltably rotatably installed on the magnetic force receiving disc (403). A torsion spring is arranged between the rotating plate (404) and the magnetic force receiving disc (403).

4. A bellows sealed ball valve with a torque-light structure according to claim 3, characterized in that, A plurality of fixed columns (406) are fixedly installed on the inner wall top of the columnar shell (401). A plurality of limit columns (405) are fixedly connected to the top of the magnetic force receiving disc (403) corresponding to the positions of the rotating plates (404). When the limit columns (405) move to the position above the columnar shell (401), their positions will be limited by the fixed columns (406).

5. The bellows sealed ball valve with a torque-lightening structure according to claim 4, characterized in that, Sealing rubber pads are fixedly connected to the top and bottom of the magnetic force receiving disc (403) corresponding to the positions of the rotating plates (404). The top of the rotating plate (404) has a plate-like structure that can contact the fixed column (406). The bottom of the rotating plate (404) has a force receiving magnetic strip affected by the magnetic force of the electromagnet (402).

6. The bellows seal ball valve with a torque-lightening structure according to claim 5, characterized in that, Limit frames (308) are fixedly installed on both the inner wall top and bottom of the fixed box (301). The limit frames (308) are used to limit the sliding position of the moving frame (305).

7. The bellows seal ball valve with a torque-lightening structure according to claim 6, characterized in that, A bar magnet (409) is slidably connected to the bottom plate of the columnar housing (401). The bar magnet (409) is acted on by the magnetic force of the electromagnet (402). A connecting frame (410) is fixedly connected to the bottom of the bar magnet (409). An inclined plane block (411) is slidably connected to the connecting frame (410) through a spring.

8. A bellows sealed ball valve with a torque-light structure according to claim 7, characterized in that, A slot for the sliding of the connecting frame (410) is provided on the limiting frame (308) at the top of the inner wall of the fixed box (301).

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