High-pressure injection syringe structure
A high-pressure injection and syringe technology, applied in the field of medical supplies, can solve problems such as increased push rod thrust, increased safety hazards, and affecting the sealing of high-pressure injection syringes, achieving the effect of reducing requirements and improving stability
Pending Publication Date: 2018-11-30
广州友沃医疗用品有限公司
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Problems solved by technology
And when the component force f2 acts on the connecting position between the piston and the syringe, due to the force component, there may be a gap between the sealing ring and the syringe, which affects the sealing performance of the high-pressure injection syringe
The existing solution is to increase the friction between the sealing ring and the syringe to avoid leakage of the high-pressure injection syringe. This solution increases the friction between the sealing ring and the syringe, resulting in Increased thrust required for the push rod increases safety hazards during high-pressure injection
Method used
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[0022] like figure 2 , image 3 As shown, a high-pressure injection syringe structure according to the present invention includes: a piston 1 and a syringe 2, the piston 1 is sleeved in the syringe 2, and the piston 1 can reciprocate in the syringe 2; one end of the syringe 2 An injection head 21 is provided; the end of the piston 1 close to the injection head 21 is provided with a conical depression at the center. The end of the piston 1 away from the injection head 21 is provided with a groove suitable for the push rod for connecting the push rod. The push rod pushes the piston 1 to reciprocate in the syringe 2 . During the bolus injection of the medicinal solution, the component force directions of the resistance f' on the piston 1 are respectively f'2 perpendicular to the conical concave surface pointing to the outside of the piston 1 and f'1 along the side of the concave position of the piston 1. Since f'2 is perpendicular to the conical concave surface and points to ...
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Abstract
The invention discloses a high-pressure injection syringe structure, including a piston, a syringe, and a sealing ring. The sealing ring is sleeved out of the piston. The piston does reciprocating motion in the syringe. One end of the syringe is provided with an injection head. The structure is characterized in that one end of the piston, close to the injection head, sinks towards the internal part of the piston. The structure is advantaged in that a component force of motion resistance of the piston structure on an injection portion surface in a liquor injection process by the piston structure is vertical to the injection portion surface and is pointed to the external of the piston, the piston structure being concave inward. At the time, the component force does not extrude the piston, and would not influence cooperative relationship between the sealing ring and the syringe. Thus, friction force between the sealing ring and the syringe is not needed to be increased to realize sealingproperty of the high-pressure injection syringe, a thrust required by a push rod in a high-pressure injection process is reduced, and stability of a high-pressure injection process is improved. Sincethe component force does not extrude the piston, requirement of piston strength is reduced on the premise of ensuring safe injection.
Description
technical field [0001] The invention relates to the field of medical supplies, in particular to a high-pressure injection syringe structure. Background technique [0002] High-pressure injectors are generally used as auxiliary equipment for X-ray machines, CT, MRI or other medical equipment. The high-pressure injector can ensure that the contrast agent is injected into the patient's cardiovascular system in a short period of time, and the high-concentration filling of the examined part can be used to obtain a better image of the liquid medicine. At the same time, it can also make the injection of contrast agent, the exposure of the host machine and the film change of the film changer coordinate and cooperate, thereby improving the accuracy of photography and the success rate of angiography. [0003] The high-pressure injection syringe is generally connected to a high-pressure syringe for liquid medicine injection. One end of the piston of the existing high-pressure injecti...
Claims
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CPCA61M5/3129A61M2005/3131
Inventor 王宇飞
Owner 广州友沃医疗用品有限公司