Pressure adjusting valve

Abstract

The present invention provides pressure-adjusting valve, which comprises: valve sleeve (36), which comprises high-pressure mouth, and the valve chamber (42) linked between the valve seat (38) and the mouth of the high pressure; valve core (39), which move in harmonization with the said valve seat to open and close the high pressure mouth; and voltage-adjusting spring (40), which insert force to the valve core-to-valve close valve direction with a set load. In the pressure-adjusting valve, the said valve core is in sphere-shape, and the valve room comprises the valve maintaining device (41) which has the sphere location concave part (55); part of the said valve core rotate with set in the location valve part; the guiding device (43) of the valve rod (41b) supporting the valve maintaining device is compressed into the inner circle of the valve sleeve and a pressure-adjusting spring is set between the location part and the valve maintaining device. Hence , the valve core can use steel ball, and reduce the flutter of the valve core, and get the pressure adjusting valve with satisfactory durability and high performance and low cost.

Description

technical field [0001] The present invention relates to an improvement of a pressure regulating valve, which comprises: a valve sleeve having a high pressure port receiving a high pressure fluid to be regulated, and a valve chamber connected to the high pressure port via a valve seat and open to the low pressure part ; the valve core, which cooperates with the above-mentioned valve seat accommodated in the above-mentioned valve chamber to open and close the above-mentioned high-pressure port; Apply force in the seating direction. Background technique [0002] The above-mentioned pressure regulating valve is known as disclosed in Patent Document 1 below. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2003-247470 [0004] In the past, the above-mentioned pressure regulating valve has the following two valves: (1) The pressure regulating spring is directly contacted with the spherical valve core rotatably seated on the valve seat, and the pressure regulating spring...

AI Technical Summary

Problems solved by technology

[0005]However, in the (1) type of valve, the spherical valve core can use an inexpensive and durable steel ball. On the other hand, the spherical valve core The opening posture of the valve is unstable, so there is a defect that the valve closing hysteresis is likely to occur due to the oscillation of the end surface, and in the (2) type valve, the end surface of the valve core with the valve stem is oscillated by the guiding action of the guide member Smaller, but because steel balls cannot be used, it is difficult to maintain durability if the (2) valve is made of easily moldable synthetic resin, and the cost becomes high if it is made of metal

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