Pressure-relievable ball valve device

Abstract

A pressure relief ball valve device includes a valve body unit and a ball unit. The valve body unit includes two valve seats and has at least two connecting channels and a ball cavity. Each valve seat has a first contact portion, at least one pressure relief slot, and a second contact portion extending along the axial direction. The ball unit includes a ball rotatably disposed in the valve body unit and abutting against the valve seats. The ball can connect or isolate the connecting channels. Each valve seat can be switched between a pressure state and a pressure relief state. In the pressure state, the pressure in the ball cavity is lower than a critical pressure, the first contact portion contacts the ball and isolates the connecting channels and the ball cavity. In the pressure relief state, the pressure in the ball cavity is higher than the critical pressure, and the at least one pressure relief slot connects the connecting channels and the ball cavity. The pressure relief slot can release part of the fluid when the pressure is too high, thereby improving the service life.

Description

Technical Field

[0001] This utility model relates to a valve, and more particularly to a pressure-relieving ball valve device. Background Technology

[0002] In pipelines, various valve devices are used to control the flow of fluid. Among them, ball valve devices are widely used as switches. By rotating a ball with a channel inside the ball cavity, the flow of connected pipelines can be switched to be open or closed. Alternatively, if multiple pipelines are connected, rotating the ball can switch the flow of some of the pipelines.

[0003] However, when the fluid in the pipeline is closed in the ball valve device, a closed structure is formed inside the ball valve device. If the temperature in the operating environment increases, the fluid will be affected by the high temperature and expand, resulting in an increase in the pressure inside the ball cavity. When the pressure inside the ball cavity is too high, the structure will be damaged by the pressure, resulting in a poor service life. Utility Model Content

[0004] The purpose of this invention is to provide a pressure-relieving ball valve device that can improve service life.

[0005] The present invention relates to a pressure-relief ball valve device, comprising a valve body unit and a ball unit.

[0006] The valve body unit includes two valve seats and has at least two connecting channels for fluid to pass through and corresponding to the valve seats respectively, and a ball cavity located between the connecting channels. Each valve seat has a first contact portion around the axis, at least one pressure relief groove for fluid to pass through, and a second contact portion extending circumferentially around the axis.

[0007] The ball unit includes a ball that is rotatably disposed in the valve body unit and abuts against the valve seat. The ball is located between the connecting channels and has a through channel. The ball can be moved to make the through channel connect the connecting channels or isolate it from the connecting channels.

[0008] Each valve seat can switch between a pressurized state and a depressurized state according to the pressure inside the ball cavity. In the pressurized state, the pressure inside the ball cavity is lower than the critical pressure, and the first contact portion contacts the ball and isolates the connecting channel from the ball cavity. In the depressurized state, the pressure inside the ball cavity is higher than the critical pressure, and the first contact portion is at least partially detached from the ball surface, while the second contact portion at least partially abuts against the ball surface. The at least one depressurization groove connects the connecting channel and the ball cavity.

[0009] The present invention provides a pressure-relief ball valve device, wherein the valve body unit further includes a first valve body surrounding and defining one of the connection channels, and a second valve body disposed on the first valve body and surrounding and defining the other connection channel.

[0010] The present invention discloses a pressure-relieving ball valve device, wherein each valve seat has a body portion surrounding the axis and a plurality of pressure-relieving grooves, the pressure-relieving grooves being formed at angular intervals around the axis in the body portion.

[0011] In this invention, a pressure-relief ball valve device is provided, wherein the second contact portion is located radially outside the first contact portion along the axis.

[0012] The present invention relates to a pressure-relieving ball valve device, wherein the second contact portion and the pressure relief groove are collinear along the circumferential direction of the axis, and the pressure relief groove divides the second contact portion into a plurality of abutting sections for abutting against the ball, and the abutting sections are respectively located between the pressure relief grooves along the circumferential direction of the axis.

[0013] The present invention relates to a pressure-relief ball valve device, wherein the pressure relief groove of each valve seat is located on the side of the body adjacent to the other valve seat along the extension direction of the axis.

[0014] The beneficial effects of this utility model are as follows: through the pressure relief groove of the valve seat, when the pressure in the ball cavity is too high, some fluid is released, thereby reducing the pressure in the ball cavity, avoiding structural damage caused by excessive pressure, and achieving the effect of improving service life. Attached Figure Description

[0015] Figure 1 This is a perspective view illustrating one embodiment of the pressure-relieving ball valve device of this utility model; Figure 2 This is a cross-sectional view of the embodiment described; Figure 3 This is a front view of a valve seat in the embodiment described above; Figure 4 It is along Figure 3 The sectional view intercepted by line IV-IV in the diagram; and Figure 5 It is along Figure 3 The sectional view taken by line V-V in the diagram. Detailed Implementation

[0016] See Figure 1 , Figure 2 , Figure 3 One embodiment of the pressure-relief ball valve device of this utility model includes a valve body unit 2 and a ball unit 3.

[0017] The valve body unit 2 includes a first valve body 21, a second valve body 22 disposed on the first valve body 21, and two valve seats 23 respectively disposed on the first valve body 21 and the second valve body 22. The first valve body 21 and the second valve body 22 each define a connecting channel 211, and the first valve body 21 further defines a ball cavity 212 located between the connecting channels 211. It should be noted that in this embodiment, the number of valve bodies is two; in other embodiments, the number of valve bodies may be three or more, including a corresponding number of valve seats 23, and is not limited thereto.

[0018] Each valve seat 23 has a body portion 231 surrounding an axis L, and a plurality of pressure relief grooves 232 formed at angular intervals around the axis L in the body portion 231 for fluid passage. The body portion 231 has a first contact portion 233 surrounding the axis L, and a second contact portion 234 extending circumferentially along the axis L, the second contact portion 234 being located radially outside the first contact portion 233 along the axis L. The pressure relief grooves 232 are located on the side of the body portion 231 adjacent to another valve seat 23 along the extension direction of the axis L. In this embodiment, the axes L of the valve seats 23 are collinear, and the valve seats 23 are spaced apart and facing each other along the extension direction of the axis L. In other embodiments, the axes L of the valve seats 23 may also be angular, and are not limited thereto. In this embodiment, the connecting channel 211 extends along the extension direction of the axis L. In other embodiments, the connecting channel 211 may also extend in other directions, and are not limited thereto. It should be noted that the fluid flowing in this embodiment can be a gas or a liquid, such as water, air or liquid nitrogen, and is not limited thereto.

[0019] It is worth mentioning that the second contact portion 234 and the pressure relief groove 232 are collinear along the circumferential direction of the axis L. The pressure relief groove 232 divides the second contact portion 234 into a plurality of abutting sections 235 for abutting against the ball 31. The abutting sections 235 are respectively located between the pressure relief grooves 232 along the circumferential direction of the axis L. In this embodiment, the number of pressure relief grooves 232 is four and the number of abutting sections 235 is four. In other embodiments, one, two, three or more pressure relief grooves 232 can be configured according to the pressure relief requirements, and a corresponding number of abutting sections 235 can be separated. This is not a limitation.

[0020] The ball unit 3 includes a ball 31 rotatably disposed on the valve body unit 2 and abutting against the valve seat 23, and a gripper 32 rotatably disposed on the first valve body 21. The ball 31 is located between the connecting channels 211 and has a through channel 311.

[0021] See Figure 2 , Figure 4 , Figure 5 It is worth mentioning that each valve seat 23 can switch between a pressurized state and a depressurized state depending on the pressure inside the ball cavity 212. In the pressurized state, the pressure inside the ball cavity 212 is lower than a critical pressure, and the first contact portion 233 contacts the ball 31 and isolates the corresponding connecting channel 211 and the ball cavity 212 (see...). Figure 4 (Imaginary line), in the depressurization state, the pressure inside the ball cavity 212 is higher than the critical pressure, and the pressure relief groove 232 connects the corresponding connecting channel 211 and the ball cavity 212 (see...). Figure 4 (Solid line), the first contact portion 233 is at least partially detached from the surface of the ball 31, the abutting section 235 at least partially abuts against the ball 31, and the pressure relief groove 232 maintains communication with the corresponding connecting channel 211 and the ball cavity 212 for pressure relief.

[0022] The gripper 32 can be operated to rotate the ball 31 between a flow position and a blocking position. In the flow position, the through channel 311 is connected to the connecting channel 211. In the blocking position, the through channel 311 and the connecting channel 211 are isolated from each other.

[0023] In practical applications, when the gripper 32 is rotated to the blocking position, each valve seat 23 remains in the pressurized state under normal conditions. When the environment changes (e.g., the temperature rises) and the pressure inside the ball cavity 212 exceeds the critical pressure, the pressure will cause the ball 31 and the valve seat 23 to deform and the valve seat 23 to switch to the pressure relief state. The first contact portion 233 is at least partially separated from the surface of the ball 31. At this time, the abutment section 235 at least partially abuts against the surface of the ball 31, which can keep the pressure relief groove 232 unobstructed so as to continuously relieve the pressure inside the ball cavity 212.

[0024] Compared to existing ball valve devices, this invention utilizes the pressure relief groove 232 of each valve seat 23 to release some fluid when the pressure in the ball cavity 212 is too high, thereby reducing the pressure in the ball cavity 212 and preventing structural damage due to excessive pressure. Furthermore, the second contact portion 234 at least partially abuts against the ball 31 when the first contact portion 233 deforms due to excessive pressure, and the pressure relief groove 232 also connects the ball cavity 212 and the connecting channel 211, achieving the effects of improving service life and facilitating use.

[0025] In conclusion, the pressure-relieving ball valve device of this utility model can indeed achieve the purpose of this utility model.

[0026] The above description is merely an embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the claims and description of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A pressure-relief ball valve device, comprising a valve body unit and a ball unit, the valve body unit including two valve seats and having at least two connecting channels for fluid passage corresponding to the valve seats respectively, and a ball cavity located between the connecting channels, characterized in that: Each valve seat has a first contact portion around an axis, at least one pressure relief groove for fluid passage, and a second contact portion extending circumferentially along the axis. The ball unit includes a ball rotatably disposed in the valve body unit and abutting against the valve seat. The ball is located between the connecting channels and has a through channel. The ball can be moved to connect the through channel to the connecting channel or to isolate it from the connecting channel. Each valve seat can switch between a pressurized state and a depressurized state according to the pressure in the ball cavity. In the pressurized state, the pressure in the ball cavity is lower than a critical pressure, and the first contact portion contacts the ball and isolates the connecting channel from the ball cavity. In the depressurized state, the pressure in the ball cavity is higher than the critical pressure, the first contact portion is at least partially detached from the ball surface, and the second contact portion at least partially abuts against the ball surface. The at least one pressure relief groove connects the connecting channel and the ball cavity.

2. The pressure-relief ball valve device according to claim 1, characterized in that: The valve body unit further includes a first valve body surrounding one of the connection channels, and a second valve body disposed on the first valve body surrounding the other connection channel.

3. The pressure-relief ball valve device according to claim 1, characterized in that: Each of the valve seats has a body portion surrounding the axis and a plurality of pressure relief grooves formed at angular intervals around the axis in the body portion.

4. The pressure-relief ball valve device according to claim 3, characterized in that: The second contact portion is located radially outside the first contact portion along the axis.

5. The pressure-relief ball valve device according to claim 3, characterized in that: The second contact portion is collinear with the pressure relief groove along the circumferential direction of the axis. The pressure relief groove divides the second contact portion into a plurality of abutting sections for abutting the ball. The abutting sections are located between the pressure relief grooves along the circumferential direction of the axis.

6. The pressure-relief ball valve device according to claim 3, characterized in that: The pressure relief groove of each valve seat is located on the side of the body adjacent to the other valve seat along the extension direction of the axis.

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