Full-bore eccentric ball valve with flow guide hole

Abstract

The utility model discloses a full-bore eccentric ball valve with a flow guide hole, which relates to the technical field of ball valves and comprises a valve body, a valve rod, a valve core and a sealing body, the flow guide hole is arranged on the valve core, sealing air bag rings are arranged on the valve core and positioned at openings at two ends of the flow guide hole, and an inflating component connected with the sealing air bag rings is arranged outside the valve core. A sleeve is arranged outside the valve element, the valve rod is rotationally connected to the sleeve, a reset spring is connected between the sleeve and the valve rod, and an extrusion piece used for extruding the inflation assembly is arranged on the valve rod. When the valve is opened, the two ends of the flow guide hole are sealed with the openings in the two sides of the valve body respectively, so that a medium is prevented from rushing into a cavity between the valve body and the valve element in the process of passing through the flow guide hole, vibration and noise generated by the valve in the medium circulation process are effectively reduced, and the service life of the valve is prolonged. And meanwhile, the flowing resistance of the medium can be reduced to a certain extent, and the stability of the medium passing through the valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically a full-bore eccentric ball valve with a flow guide hole. Background Technology

[0002] Ball valves are among the most widely used valves. They are simple in structure, reliable in sealing, and easy to maintain, making them widely used in petroleum, chemical, metallurgical, textile, food, nuclear energy, and aerospace industries. Ball valves have a 90° rotational action. The plug body is a ball with a circular through-hole or channel along its axis. In pipelines, they are mainly used for shut-off, distribution, and changing the flow direction of media. They require only a 90° rotation and a very small torque to achieve a tight seal.

[0003] The prior art patent document with publication number "CN 217422256 U" discloses an eccentric ball valve with a flow guide hole, which includes components such as a valve body, a valve core, a drive unit, and a sealing body. Although this eccentric ball valve reduces the eddy current of the internal high-speed fluid by setting a flow guide hole with the same diameter as the high-pressure port of the valve body inside the valve core, thereby reducing noise and vibration and ensuring the stability of valve operation, the flow guide hole on the valve core of this eccentric ball valve lacks a sealing function between it and the valve body. When the valve is opened, the medium will also rush into the cavity between the valve body and the valve core during the process of passing through the flow guide hole, generating a certain amount of vibration and noise. At the same time, it will also increase the resistance of the medium flow, resulting in the medium still not being stable enough when passing through the valve. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a full-bore eccentric ball valve with a flow guide hole, which solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a full-bore eccentric ball valve with a flow guide hole, comprising a valve body, a valve stem, a valve core, and a sealing body. The valve core has a flow guide hole, and sealing airbag rings are provided at both ends of the flow guide hole on the valve core. An inflation assembly connected to the sealing airbag rings is provided on the outside of the valve core. A sleeve is provided on the outside of the valve core, and the valve stem is rotatably connected to the sleeve. A return spring is connected between the sleeve and the valve stem, and an extrusion member for extruding the inflation assembly is provided on the valve stem.

[0008] Optionally, the inflation assembly includes an inflation cylinder, a piston, a piston rod, and a guide tube. The piston is slidably connected inside the inflation cylinder, one end of the piston rod is connected to the piston, and the other end is inserted into the sleeve. The guide tube is connected between the inflation cylinder and the sealing airbag ring.

[0009] Optionally, the inflation assembly further includes a return spring connected between the piston rod and the sleeve.

[0010] Optionally, the piston rod is provided with a roller at one end near the extruder, and the side of the extruder near the roller is inclined.

[0011] Preferably, a limiting component is fixedly connected inside the valve body to limit the valve core when the valve is opened.

[0012] Optionally, the sealing body is fixedly connected to the middle of the valve core, and a sealing ring adapted to the sealing body is fixedly connected to one end opening of the valve body.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] When the valve is opened, the two ends of the guide hole are sealed to the openings on both sides of the valve body. This prevents the medium from rushing into the cavity between the valve body and the valve core during the process of the medium passing through the guide hole. This effectively reduces the vibration and noise generated by the valve during the medium flow process. At the same time, it also reduces the resistance of the medium flow to a certain extent, making the medium flow more smoothly and improving the stability of the medium when passing through the valve. Attached Figure Description

[0016] Figure 1 This is a frontal three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a top sectional view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the front sectional view of the present invention;

[0019] Figure 4 This is a three-dimensional structural diagram of the valve core of this utility model;

[0020] Figure 5 This is a top sectional view of the inflatable component of this utility model.

[0021] Figure 6 This utility model Figure 3 Enlarged structural diagram at point B.

[0022] In the diagram: 1. Valve body; 2. Valve stem; 3. Valve core; 4. Guide hole; 5. Sleeve; 6. Sealing ring; 7. Sealing airbag ring; 8. Inflation assembly; 801. Inflation cylinder; 802. Piston; 803. Piston rod; 804. Guide tube; 805. Return spring; 806. Roller; 9. Extrusion component; 10. Torsion spring; 11. Sealing body; 12. Limiting component. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides an embodiment of a full-bore eccentric ball valve with a flow guide orifice: such as Figures 1 to 4 As shown, the valve includes a valve body 1, a valve stem 2, a valve core 3, and a sealing body 11. The valve core 3 has a flow guide hole 4. The sealing body 11 is fixedly connected to the middle of the valve core 3. A sealing ring 6 that matches the sealing body 11 is fixedly connected to one end opening inside the valve body 1. Sealing airbag rings 7 are provided at both ends of the flow guide hole 4 on the valve core 3. An inflation assembly 8 connected to the sealing airbag ring 7 is provided on the outside of the valve core 3. A sleeve 5 is provided on the outside of the valve core 3. The valve stem 2 is rotatably connected to the sleeve 5. A return spring 805 is connected between the sleeve 5 and the valve stem 2. A squeezing member 9 for squeezing the inflation assembly 8 is provided on the valve stem 2. A limit member 12 is fixedly connected inside the valve body 1 to limit the valve core 3 when the valve is opened.

[0025] When the valve is closed, the sealing body 11 is sealed to the sealing ring 6, thus sealing one end of the valve body 1. When the valve needs to be opened, the valve stem 2 is turned by an external actuator (not shown in the actuator diagram). During this process, the valve stem 2 drives the sleeve 5 and the valve core 3 to rotate synchronously via the torsion spring 10, thereby separating the sealing body 11 from the sealing ring 6. When the outer surface of the valve core 3 contacts the limiting member 12, the valve core 3 and the sleeve 5 will stop rotating due to the obstruction of the limiting member 12. At this time, the guide hole 4 is also connected to the inlet and outlet of both ends of the valve body 1. Then, the valve stem 2 is rotated by a certain angle. In the process, the valve stem 2 rotates on the sleeve 5, thereby compressing the torsion spring 10. At the same time, it drives the extrusion member 9 to rotate and extrudes the inflation assembly 8, thereby inflating the sealing airbag rings 7 on both sides, causing them to expand to a certain extent. This presses one of the sealing airbag rings 7 tightly onto the sealing ring 6 and the other sealing airbag ring 7 tightly onto the opening on the other side of the valve body 1, thereby sealing the two ends of the guide hole 4 with the openings on both sides of the valve body 1. This prevents the medium from rushing into the cavity between the valve body 1 and the valve core 3 during the process of the medium passing through the guide hole 4, and improves the stability of the medium when passing through the valve.

[0026] like Figure 5 and Figure 6 As shown, the inflation assembly 8 includes an inflation cylinder 801, a piston 802, a piston rod 803, and a conduit 804. The piston 802 is slidably connected inside the inflation cylinder 801. One end of the piston rod 803 is connected to the piston 802, and the other end is inserted into the sleeve 5. The conduit 804 is connected between the inflation cylinder 801 and the sealing airbag ring 7.

[0027] During the process of the valve stem 2 driving the extruder 9 to rotate on the sleeve 5, the extruder 9 will push the piston 802 to slide inside the air cylinder 801 by extruding one end of the piston rod 803, thereby pushing the air in the air cylinder 801 into the sealing airbag ring 7 through the conduit 804, thus achieving the purpose of inflating the sealing airbag ring 7. This inflation component 8 can ensure stable inflation while also ensuring its simple structure. The simple structure can reduce its failure rate, thereby improving its reliability.

[0028] like Figure 5As shown, the inflation assembly 8 also includes a return spring 805, which is connected between the piston rod 803 and the sleeve 5. When the valve is opened, as the squeezing member 9 pushes the piston rod 803 and piston 802 to slide, the piston rod 803 and sleeve 5 will squeeze the return spring 805 to a certain extent. During the process of turning the valve rod 2 in the opposite direction to close the valve, under the rebound force of the torsion spring 10, the valve core 3 remains stationary at the beginning of the reverse rotation of the valve rod 2, and the squeezing member 9 will gradually disengage from the piston rod 803. At the same time, under the rebound force of the return spring 805... Under the action of the valve, the piston rod 803 and piston 802 can be pulled back to their original positions. At this time, the air cylinder 801 will pump air out of the sealing airbag ring 7 through the conduit 804 to reduce its volume. Then, the valve rod 2 will continue to reverse, which will drive the valve core 3 to rotate in the opposite direction through the torsion spring 10 and the sleeve 5. In this process, since the volume of the sealing airbag ring 7 has been reduced in advance, the friction between the sealing airbag ring 7 and the valve body 1 or the sealing ring 6 can be reduced, thereby reducing the wear on the sealing airbag ring 7 when the valve is opened and closed and ensuring its normal service life.

[0029] like Figure 5 As shown, a roller 806 is provided at one end of the piston rod 803 near the extruder 9. The side of the extruder 9 near the roller 806 is inclined. When the extruder 9 extrudes the piston rod 803, the wedge-shaped inclined surface of the extruder 9 will contact the roller 806, thereby reducing the friction between the piston rod 803 and the extruder 9 and avoiding large wear between the two. At the same time, it will make it easier for the extruder 9 to extrude the inflation component 8.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A full bore eccentric ball valve with flow guiding holes, comprising a valve body (1), a valve stem (2), a valve core (3) and a sealing body (11), a flow guiding hole (4) is formed on the valve core (3), characterized in that: The valve core (3) is provided with sealing airbag rings (7) at both ends of the guide hole (4), and the valve core (3) is provided with an inflation assembly (8) connected to the sealing airbag rings (7). The valve core (3) is provided with a sleeve (5) on the outside, and the valve stem (2) is rotatably connected to the sleeve (5). A return spring (805) is connected between the sleeve (5) and the valve stem (2), and the valve stem (2) is provided with a squeezing member (9) for squeezing the inflation assembly (8).

2. The full-pilot eccentric ball valve with flow guiding holes according to claim 1, characterized in that: The inflation assembly (8) includes an inflation cylinder (801), a piston (802), a piston rod (803), and a conduit (804). The piston (802) is slidably connected inside the inflation cylinder (801). One end of the piston rod (803) is connected to the piston (802), and the other end is inserted into the sleeve (5). The conduit (804) is connected between the inflation cylinder (801) and the sealing airbag ring (7).

3. The ported full bore eccentric ball valve of claim 2, wherein: The inflation assembly (8) also includes a return spring (805), which is connected between the piston rod (803) and the sleeve (5).

4. The under-lug full-pilot eccentric ball valve of claim 2, wherein: The piston rod (803) is provided with a roller (806) at one end near the extruder (9), and the side of the extruder (9) near the roller (806) is inclined.

5. The under-lug full-pilot eccentric ball valve of claim 1, wherein: The valve body (1) is internally fixedly connected to a limiting component (12) for limiting the valve core (3) when the valve is opened.

6. The ported full bore eccentric ball valve of claim 1, wherein: The sealing body (11) is fixedly connected to the middle part of the valve core (3), and a sealing ring (6) adapted to the sealing body (11) is fixedly connected to one end opening of the valve body (1).

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