High-pressure-resistant ball valve

Abstract

The high-pressure-resistant ball valve relates to the technical field of ball valves and comprises a valve body and flanges, the flanges are fixedly connected to the outer sides of the two ends of the valve body, the two ends of the valve body are fixedly connected with sealing rings, the sealing rings are located on the inner sides of the flanges, the two sides of the interior of the valve body are provided with flow guide channels in rotational symmetry, and the flow guide channels are communicated with the valve body. And the flow guide channel is provided with an input end and two output ends. According to the high-pressure-resistant ball valve, the output end of the flow guide channel is connected with the connecting pipe, then high-pressure fluid is guided into the gasket, the inner side of the gasket is of a hollow structure, the gasket and the mounting ring form a sealed annular space in the gasket, and at the moment, the high-pressure fluid can enter the gasket; according to the ball valve, the inner portion of the gasket is supported by high liquid, the gasket can deform, the gasket is attached to the two sides of the ball core more tightly, compared with the mode that pressure is applied through a spring, the ball valve is not prone to corrosion and low in replacement frequency, and the service life of the ball valve is prolonged.

Description

Technical Field

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

[0002] A ball valve is a valve that uses the rotation of an internal ball to control the flow of fluid. It is widely used in industrial and civil piping systems due to its simple structure, quick operation and good sealing performance.

[0003] The ball core is fixed inside the ball valve by two valve seats. When the ball valve is in a high-pressure state, a gap is easily formed between the valve seat and the ball core, causing fluid leakage.

[0004] In order to overcome the above-mentioned defects, a Chinese patent of the prior art (publication number: CN206647561U) discloses a high-pressure ball valve, which utilizes the space between the valve seat and the valve body to place a gasket. The gasket enhances the sealing performance. The cooperation between the step gasket and the step groove improves the safety of the high-pressure ball valve. A sealing ring is provided at an appropriate position to further avoid the possibility of leakage of the high-pressure ball valve. The setting of the drain valve provides the high-pressure ball valve with the ability to drain and clean sewage, thereby ensuring the reliability of the high-pressure ball valve in long-term use.

[0005] Although the existing technology can overcome the above-mentioned shortcomings, other problems still exist during its operation: the above technology applies force to the valve seat toward the ball core through the spring and the gasket, and the fluid inside the valve body easily contacts the spring, causing the spring to corrode and lose the pressure it applies to the valve seat. Utility Model Content

[0006] The purpose of the utility model is to provide a high-pressure resistant ball valve to solve the problem in the background art that the fluid inside the valve body easily contacts the spring, causing the spring to corrode and lose the pressure it exerts on the valve seat.

[0007] To achieve the above object, the present invention provides the following technical solution: a high-pressure resistant ball valve, comprising a valve body and a flange, wherein the flange is fixedly connected to the outer sides of both ends of the valve body, and both ends of the valve body are fixedly connected to sealing rings, and the sealing rings are located on the inner sides of the flanges;

[0008] Rotationally symmetrical flow guides are provided on both sides of the valve body, and the flow guides have an input end and two output ends. A sliding rod is fixedly connected to the middle of the input end of the flow guide, and a sealing ring is fixedly connected to the inner side of the input end of the flow guide, a sealing ball is slidably connected to the outer side of the slide rod, and a spring is fixedly connected between the sealing ball and the end of the slide rod away from the sealing ring, and the spring is located on the outer side of the slide rod.

[0009] Preferably, two symmetrically distributed mounting rings are fixedly connected in the valve body interior middle part, and the side close to each other of the two mounting rings is fixedly connected with a gasket, and the gasket is made of silica gel material.

[0010] Preferably, the gasket is made of hollow structure of rubber material, and the two sides of the gasket are provided with symmetrically distributed connecting pipes, the connecting pipes are clamped and connected in the interior of the output end of the flow guide channel, and the two output ends of the two flow guide channels are connected with the two connecting pipes respectively, and the input end of the flow guide channel is communicated with the two ends of the valve body interior.

[0011] Preferably, the valve body top middle part is fixedly connected with a mounting box, and the valve body interior is rotatably connected with a ball core, the top of the ball core is fixedly connected with a valve rod, and the valve rod extends to the interior middle part of the mounting box.

[0012] Preferably, the valve rod top is fixedly connected with a worm gear, and the outer side of the worm gear is engaged with four worm gears which are symmetrically distributed in rotation, and the end of each worm gear is fixedly connected with a first bevel gear.

[0013] Preferably, the first bevel gear top side is engaged with a second bevel gear, the second bevel gear top is fixedly connected with a driven gear, and the inner side of the four driven gears is engaged with a switch assembly.

[0014] Preferably, the switch assembly comprises a rotating handle and a gear, the outer side of the gear is engaged with the inner side of the driven gear, and the rotating handle extends to the top of the mounting box, and the worm gear, the worm gear, the first bevel gear, the second bevel gear and the driven gear are all rotatably connected in the interior of the mounting box.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] The high-pressure resistant ball valve is connected with the connecting pipe through the output end of the flow guide channel, and then the high-pressure fluid is introduced into the interior of the gasket, the interior of the gasket is hollow, and the gasket and the mounting ring form a sealed annular space in the interior of the gasket, at this time, the high-pressure fluid will enter the interior of the gasket, so that the interior of the gasket is supported by the high liquid, the gasket itself will be deformed, the gasket and the two sides of the ball core are more closely fitted, compared with the spring pressure, it is not easy to be corroded, and the replacement frequency is low, the service life of the ball valve is prolonged.

[0017] Further, when the fluid direction in the flow guide channel is from the output end to the input end, at this time, the fluid will drive the spring close to the sealing ring and form a sealing structure with the sealing ring, thereby preventing the backflow of the fluid in the flow guide channel from affecting the function of the ball valve.

[0018] Furthermore, when the internal flow channel of the ball core and the valve body are in a non-parallel or non-vertical state, the direction of the ball core is not in the same straight line as the flow direction of the fluid, so that the fluid inside the ball core will impact the internal flow channel, thereby exerting a rotational force on the ball core. The top of the ball core is driven by the valve stem and the worm gear, and the worm gear and the worm are self-locking. The rotational force exerted on the ball core will be transmitted to the meshing point of the worm gear and the worm gear, and the rotational force exerted on the ball core will be dispersed by multiple worm gears outside the worm gear, so that the pressure accessories exerted on the meshing point of each worm gear and worm gear are distributed, thereby preventing the ball core from being subjected to high pressure and causing damage to the internal parts of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0021] Figure 3 This is a schematic diagram of the guide channel structure of the utility model;

[0022] Figure 4 For this utility model Figure 3 Schematic diagram of the partially enlarged structure;

[0023] Figure 5 This is a schematic diagram of the structure of the gasket of the utility model;

[0024] Figure 6 This is a schematic diagram of the worm gear structure of the utility model;

[0025] Figure 7 This is a schematic diagram of the switch assembly structure of the utility model.

[0026] In the figure: 1. Valve body; 2. Flange; 3. Sealing ring; 4. Flow guide; 5. Sliding rod; 6. Sealing ring; 7. Sealing ball; 8. Spring; 9. Mounting ring; 10. Gasket; 11. Connecting pipe; 12. Mounting box; 13. Ball core; 14. Valve stem; 15. Worm gear; 16. Worm; 17. First bevel gear; 18. Second bevel gear; 19. Driven gear; 20. Switch assembly. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figure 1- Figure 7 , the utility model provides the following technical solutions:

[0029] A high-pressure resistant ball valve comprises a valve body 1 and a flange 2, wherein the flange 2 is fixedly connected to the outer sides of both ends of the valve body 1, and a sealing ring 3 is fixedly connected to both ends of the valve body 1, and the sealing ring 3 is located on the inner side of the flange 2;

[0030] Rotationally symmetrical flow guides 4 are provided on both sides of the valve body 1, and the flow guide 4 has an input end and two output ends. A slide rod 5 is fixedly connected to the middle of the input end of the flow guide 4, and a sealing ring 6 is fixedly connected to the inner side of the input end of the flow guide 4. A sealing ball 7 is slidably connected to the outside of the slide rod 5, and a spring 8 is fixedly connected between the sealing ball 7 and the end of the slide rod 5 away from the sealing ring 6, and the spring 8 is located on the outside of the slide rod 5.

[0031] Two symmetrically distributed mounting rings 9 are fixedly connected to the middle of the valve body 1 , and a gasket 10 is fixedly connected to one side of the two mounting rings 9 close to each other, and the gasket 10 is made of silicone material.

[0032] The gasket 10 is a hollow structure made of rubber material, and symmetrically distributed connecting pipes 11 are provided on both sides of the gasket 10. The connecting pipes 11 are snap-connected to the inside of the output end of the guide channel 4, and the two output ends of the two guide channels 4 are respectively connected to the two connecting pipes 11, and the input end of the guide channel 4 is connected to the two ends of the inner side of the valve body 1.

[0033] A mounting box 12 is fixedly connected to the middle of the top of the valve body 1 , and a ball core 13 is rotatably connected to the inside of the valve body 1 . A valve stem 14 is fixedly connected to the top of the ball core 13 , and the valve stem 14 extends to the middle of the inside of the mounting box 12 .

[0034] A worm gear 15 is fixedly connected to the top of the valve stem 14 , and four rotationally symmetrically distributed worms 16 are meshed on the outside of the worm gear 15 , and a first bevel gear 17 is fixedly connected to the end of each worm gear 16 .

[0035] A second bevel gear 18 is meshed with one side of the top of the first bevel gear 17 , and a driven gear 19 is fixedly connected to the top of the second bevel gear 18 . The switch assembly 20 is meshed with the inner sides of the four driven gears 19 .

[0036] The switch assembly 20 includes a rotating handle and a gear, and the outer side of the gear is engaged with the inner side of the driven gear 19, and the rotating handle extends to the top of the mounting box 12. At the same time, the worm gear 15, the worm 16, the first bevel gear 17, the second bevel gear 18 and the driven gear 19 are all rotatably connected to the inside of the mounting box 12.

[0037] Example 2: Based on Example 1, its specific working principle is as follows:

[0038] This high-pressure resistant ball valve is installed in a pipeline through the flanges 2 at both ends of the valve body 1. At this time, the sealing ring 3 will be located between the valve body 1 and the pipeline to form a sealing structure, and then the ball valve is installed in the pipeline as a whole. By rotating the switch assembly 20, the ball core 13 is driven to rotate in the middle of the inner side of the valve body 1, thereby realizing the opening and closing state of the valve body 1 controlled by the ball core 13;

[0039] When the internal flow channel of the ball core 13 is parallel to the valve body 1, the ball valve is in an open state. The high-pressure fluid inside the valve body 1 will enter the interior through the input end of the flow guide channel 4, and through the mutual connection between the output end of the flow guide channel 4 and the connecting pipe 11, and then the high-pressure fluid will be introduced into the gasket 10. The inner side of the gasket 10 is set as a hollow structure, and the gasket 10 and the mounting ring 9 form a sealed annular space inside the gasket 10. At this time, the high-pressure fluid will enter the gasket 10, so that the inside of the gasket 10 is supported by the high liquid. The gasket 10 itself will be deformed, so that the gasket 10 and the two sides of the ball core 13 fit more tightly. Compared with the pressure applied by the spring, it is not easy to corrode, and the replacement frequency is low, which extends the service life of the ball valve.

[0040] When the internal flow channel of the ball core 13 is perpendicular to the valve body 1, the ball valve is in a closed state. There is still fluid at the input end of the high-pressure fluid inside the valve body 1. At this time, the high-pressure fluid will enter the gasket 10 through the flow guide 4. When the high-pressure fluid passes through the input end of the flow guide 4, it will push the sealing ball 7 to slide on the outside of the slide rod 5, causing the slide rod 5 to compress the spring 8, thereby separating the spring 8 and the sealing ring 6 from each other. At this time, the input end of the flow guide 4 is in an open state, thereby introducing the high-pressure fluid into it.

[0041] Since the two flow guide channels 4 are rotationally symmetrically distributed, when the valve body is in the closed state, only one of the output ends of the two flow guide channels 4 can enter the high-pressure fluid, and the high-pressure fluid entering the gasket 10 will enter the flow guide channel 4 through the connecting pipe 11 and the output end of the flow guide channel 4. When the direction of the fluid in the flow guide channel 4 is from the output end to the input end, the fluid will drive the spring 8 to approach the sealing ring 6 and contact with it to form a sealing structure, thereby preventing the fluid in the flow guide channel 4 from backflowing and affecting the function of the ball valve;

[0042] In the process of the switch assembly 20 driving the ball core 13 to rotate, the gear at its bottom drives the driven gear 19 on its outside to rotate. At this time, the driven gear 19 will drive the four first bevel teeth 17 and the four worms 16 to rotate synchronously in the same direction through the second bevel gear 18 at its bottom. In the process of the rotation of the worm 16, the worm wheel 15 will be driven to rotate, so that the worm wheel 15 drives the valve stem 14 to rotate to realize the rotation of the ball core 13 inside the valve body 1. When the internal flow channel of the ball core 13 is not parallel or perpendicular to the valve body 1, the direction of the ball core 13 is not in the same direction as the flow direction of the fluid. In a straight line, the fluid inside the ball core 13 will impact the flow channel inside it, thereby applying a rotational force to the ball core 13. The top of the ball core 13 is driven by the valve stem 14 and the worm gear 15, and the worm gear 15 and the worm 16 are self-locking. The rotational force on the ball core 13 will be transmitted to the meshing point of the worm gear 15 and the worm 16, and the rotational force on the ball core 13 will be dispersed by the multiple worm gears 16 outside the worm gear 15, so that the pressure on each meshing point of the worm gear 16 and the worm gear 15 is distributed, thereby preventing the ball core 13 from being subjected to high pressure and causing damage to the internal parts of the ball valve.

[0043] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-pressure resistant ball valve, comprising a valve body (1) and a flange (2), wherein the flange (2) is fixedly connected to the outer sides of both ends of the valve body (1), and both ends of the valve body (1) are fixedly connected to a sealing ring (3), and the sealing ring (3) is located on the inner side of the flange (2); Its characteristics are: The valve body (1) is provided with rotationally symmetrical flow guides (4) on both sides thereof, and the flow guides (4) are provided with an input end and two output ends. A slide rod (5) is fixedly connected to the middle of the input end of the flow guides (4), and a sealing ring (6) is fixedly connected to the inner side of the input end of the flow guides (4). A sealing ball (7) is slidably connected to the outer side of the slide rod (5), and a spring (8) is fixedly connected between the sealing ball (7) and the end of the slide rod (5) away from the sealing ring (6), and the spring (8) is located on the outer side of the slide rod (5).

2. A high pressure resistant ball valve according to claim 1, characterized in that: Two symmetrically distributed mounting rings (9) are fixedly connected to the middle of the valve body (1), and washers (10) are fixedly connected to the sides of the two mounting rings (9) that are close to each other, and the washers (10) are made of silicone material.

3. A high-pressure resistant ball valve according to claim 2, characterized in that: The gasket (10) is a hollow structure made of rubber material, and symmetrically distributed connecting pipes (11) are provided on both sides of the gasket (10), and the connecting pipes (11) are snap-connected to the inside of the output end of the flow guide channel (4), and the two output ends of the two flow guide channels (4) are respectively connected to the two connecting pipes (11), and the input end of the flow guide channel (4) is communicated with the two ends of the inner side of the valve body (1).

4. A high-pressure resistant ball valve according to claim 3, characterized in that: The top middle of the valve body (1) is fixedly connected to a mounting box (12), and the interior of the valve body (1) is rotatably connected to a ball core (13). The top of the ball core (13) is fixedly connected to a valve stem (14), and the valve stem (14) extends to the interior middle of the mounting box (12).

5. A high pressure resistant ball valve according to claim 4, characterized in that: The top of the valve stem (14) is fixedly connected to a worm wheel (15), and the outer side of the worm wheel (15) is meshed with four rotationally symmetrically distributed worms (16), and the end of each worm wheel (16) is fixedly connected to a first bevel tooth (17).

6. A high-pressure resistant ball valve according to claim 5, characterized in that: A second bevel tooth (18) is meshed with one side of the top of the first bevel tooth (17), a driven gear (19) is fixedly connected to the top of the second bevel tooth (18), and a switch assembly (20) is meshed with the inner sides of the four driven gears (19).

7. A high pressure resistant ball valve according to claim 6, characterized in that: The switch assembly (20) includes a rotating handle and a gear, and the outer side of the gear is meshed with the inner side of the driven gear (19), and the rotating handle extends to the top of the installation box (12), and the worm wheel (15), the worm (16), the first bevel gear (17), the second bevel gear (18) and the driven gear (19) are all rotatably connected to the inside of the installation box (12).

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