A compact externally controlled direct-acting relief valve
A direct-acting relief valve, compact technology, applied in the field of hydraulic valves, can solve the problems of low response time requirements, inability to design external control oil ports, complex structure, etc., and meet the requirements of simplified processing technology, easy realization, and processing accuracy not high effect
Active Publication Date: 2016-08-24
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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AI Technical Summary
Problems solved by technology
However, for the relief valve, the optional direct-acting relief valve product cannot be designed with an external control oil port due to structural limitations; and the pilot relief valve with an external control oil port has a complex structure, expensive price, and large volume.
In some applications, it is necessary to decide when the pressure needs to be released according to the working conditions, and the response time requirement is very low. At this time, choosing a pilot relief valve will increase the cost
Method used
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[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0016] like figure 1 As shown, the present invention includes a valve body 1, a sealing plug 2, a valve core 3, a spring 4 and a plug 5, wherein the valve body 1 is the shell of an externally controlled direct-acting overflow valve, and the valve body 1 is axially From top to bottom, there are multiple connecting channels connected with the actuator; there are three connecting channels in this embodiment, namely the first connecting channel 16, the second connecting channel 18 and the third connecting channel 20, and the three connecting channels are along the Open radially and parallel to each other.
[0017] The center of the valve body 1 has a hole 13 along the axial direction, and the two ends of the hole 13 are respectively tapered surfaces 14 for sealing. The sealing plug 2 is screwed to one end (upper end) of the valve body 1, and the sealing plug 2 ...
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The invention relates to a hydraulic valve in the field of hydraulic transmission and control technology, and particularly to a compact type external controlled direct relief valve. The compact type external controlled direct relief valve comprises a valve body, a sealing plug, a valve core, a spring and a block; the valve body is an outer shell of the external controlled direct relief valve, and multiple connecting channels interconnected with an executing element are arranged on the valve body along the axial direction; a hole way is arranged in the valve body, the sealing plug and the block are respectively in sealing connection to both ends of the valve body; the valve core is held in the hole way, and abutted the inner wall of the hole way in the manner of sealing; the hole way between the block and the valve core is a P cavity, a T cavity is arranged on the valve core, an A cavity is arranged on the sealing plug, and three cavities are respectively corresponding to the connecting channels; the spring is arranged in the P cavity, both ends of the spring are respectively abutted to one end of each of the block and the valve core, and the other end of the valve core is abutted with the sealing plug in the manner of sealing; the valve body can be glided along the axial direction of the hole way, so that the middle between the A cavity and the T cavity can be closed or interconnected. The compact type external controlled direct relief valve is stable in performance, compact in structure, low in cost, and easy to realize, and so on.
Description
technical field [0001] The invention relates to a hydraulic valve in the technical field of hydraulic transmission and control, in particular to a compact externally controlled direct-acting overflow valve. Background technique [0002] At present, in the field of hydraulic transmission, there are already various functions and forms of hydraulic valves for designers to choose from. However, for the relief valve, the optional direct-acting relief valve product cannot be designed with an external control oil port due to structural limitations; and the pilot relief valve with an external control oil port has a complex structure, expensive price, and large volume. In some applications, it is necessary to decide when the pressure needs to be released according to the working conditions, and the response time requirement is very low. At this time, choosing a pilot relief valve will increase the cost. Therefore, it has become an urgent problem to develop an externally controlled d...
Claims
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IPC IPC(8): F15B13/02
CPCF15B13/02F16K17/04
Inventor 杜林森孙斌张奇峰霍良青
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI