Switching valve, stabilized pressure pump and water jet equipment

Abstract

The invention discloses a switching valve, which is provided with a fluid channel, wherein the two ends of the fluid channel are provided with a first inlet and outlet and a second inlet and outlet, the fluid channel comprises a valve cavity, a valve element is movably arranged in the valve cavity, a first communicating opening is formed in the first end of the valve cavity and communicates with the first inlet and outlet, a second communicating opening is formed in the second end of the valve cavity and communicates with the second inlet and outlet; a sealing surface is arranged in the valve cavity close to the first communication opening, the center of the second communication opening and the central axis of the valve cavity are staggered, and a pressure difference between the first inlet and outlet and the second inlet and outlet enables the valve element to be switched between a first position and a second position so that a fluid channel can be opened or closed. The invention further discloses a stabilized pressure pump and a water jet cutter. The switching valve, the stabilized pressure pump and the water jet cutter equipment are easier to manufacture, not prone to losing the one-way conduction function due to abrasion and other reasons and long in service life.

Description

technical field [0001] The invention relates to the technical field of medical pump bodies, in particular to a switching valve, a pressure stabilizing pump and water jet equipment. Background technique [0002] With the development of modern medical equipment, medical waterjet equipment with more and more mature technology is gradually applied in clinical operations. Medical waterjet equipment uses high-pressure injection of physiological saline to remove traumatic wounds, chronic wounds and other soft tissue injuries. Harm healthy tissue and help facilitate the healing process. Among them, the pressure-stabilizing pump that provides high-pressure water flow plays a pivotal role in the entire medical waterjet equipment. [0003] In the switching valve of the pressure stabilizing pump in the existing medical water jet, one end of the one-way valve chamber and the valve core can be in contact with the valve core to seal and block the water flow, generally in the form of a con...

AI Technical Summary

Problems solved by technology

[0003] In the switching valve of the pressure stabilizing pump in the existing medical water jet, one end of the one-way valve chamber and the valve core can be in contact with the valve core to seal and block the water flow, generally in the form of a cone; the other end can move on the valve core. When reaching this position, the water flow can still pass through. In order to realize this function, in the prior art, components such as raised convex surfaces or springs are often used in the valve cavity to lift the valve core to the inside of the valve cavity, so that the valve core cannot be in contact with the valve cavity. The connecting ports of the two are tightly combined, unable to form a blocking surface, and then keep unimpeded

[0004] However, on the one hand, this method of jacking up the spool inwards is difficult to process the special shape because the spool is small, and its precision has an important impact on whether the spool can ensure the flow of water. Therefore, the processing The accuracy is difficult to guarantee; on the other hand, when the valve core hits the raised structure under the action of high-speed water flow, it is easy to cause damage to the valve core; after long-term use, the raised part is also easy to be ground, and the raised part After grinding, the spool will become easy to block the passage here and lose the function of one-way conduction

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