A piston type pressure relief sealing device

A sealing device, piston type technology, applied in valve devices, valve devices for absorbing fluid energy, lift valves, etc., can solve the problems of control device jitter, high strength requirements of accessories, impact changes, etc., to reduce the overall jitter. Effect

Active Publication Date: 2016-08-31
NINGJIN MEIHUA IND
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  • Description
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AI Technical Summary

Problems solved by technology

[0002] At present, the cut-off fluid control device has a large torque when it is opened or closed under pressure, and the corresponding accessories require high strength, which increases the design and production costs; at the same time, due to the change of the fluid flow path during the opening or closing process , so that the impact of the fluid on the related accessories of the control device changes sharply, so that the control device shakes or even breaks

Method used

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  • A piston type pressure relief sealing device
  • A piston type pressure relief sealing device
  • A piston type pressure relief sealing device

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Embodiment Construction

[0016] Below, the substantive features and advantages of the present invention will be further described in conjunction with examples, but the present invention is not limited to the listed examples.

[0017] see Figure 1-4 , a piston type pressure relief sealing device, including a tray 3, the tray 3 is also provided with a pressure relief hole 4 through the disc body, the tray 3 is installed on the valve shaft 8 and can move along the axis of the valve shaft 8 , the valve shaft 8 is provided with a pressure relief groove, and a sealing ring 6 is arranged adjacent to the pressure relief groove, and the sealing or opening is realized by adjusting the positional relationship between the tray 3 and the valve shaft 8, that is, sealing When the ring 6 is higher than the position of the pressure relief hole 4, the seal is realized, otherwise, the open state is realized, and at the same time, the fluid flows through the pressure relief hole 4 to communicate with the pressure relief...

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Abstract

The invention relates to a piston type pressure relief sealing device which comprises a tray. The tray is further provided with a pressure relief hole penetrating a tray body, the tray is installed on a valve shaft and can move along the axis of the valve shaft, the valve shaft is provided with a pressure relief groove, a seal ring is adjacent to the pressure relief groove, the sealing or opening is achieved by adjusting the position relations between the tray and the valve shaft, namely the sealing is achieved when the seal ring is higher than the position of the pressure relief hole, or else an opened state is achieved, and fluid achieves pressure relief through flowing after the communication of the pressure relief hole and the pressure relief groove. The piston type pressure relief sealing device can achieve graded sealing or opening of the fluid, the large torque caused by high pressure is reduced during the opening, the overall shaking caused by the impact on accessories caused by the high-pressure fluid is reduced; and the damage to the accessories caused by a water hammer formed due to the sudden change of the pressure is relieved during the closing.

Description

technical field [0001] The invention relates to a fire fighting equipment, in particular to a piston type pressure relief sealing device. Background technique [0002] At present, the cut-off fluid control device has a large torque when it is opened or closed under pressure, and the corresponding accessories require high strength, which increases the design and production costs; at the same time, due to the change of the fluid flow path during the opening or closing process , so that the impact of the fluid on the related accessories of the control device changes sharply, so that the control device shakes or even breaks. For example, in our daily life, sometimes when the faucet is turned on, the faucet will make a harsh sound and a slight vibration due to the high water pressure. Contents of the invention [0003] The object of the present invention is to solve the above technical problems and provide a piston type pressure relief sealing device. [0004] In order to ach...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/36F16K47/02F16K47/04
CPCF16K1/36F16K47/02F16K47/04
Inventor 张立勇
Owner NINGJIN MEIHUA IND
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