Periodic pipe rolling mill and its hydraulic control device for rapid switching of flow rate and pressure
A technology for fast switching and control devices, applied in fluid pressure actuators, mechanical equipment, servo meter circuits, etc., can solve system instability, safety accidents, and the inability to reliably ensure that the main valve core of the two-way cartridge valve does not leak Sealing and other issues, to achieve a smooth opening or closing process and reduce the effect of hydraulic shock
Active Publication Date: 2016-08-17
TAIYUAN HEAVY IND
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Problems solved by technology
The rolling of the periodic pipe rolling mill is reciprocating forging and rolling. When the rolling process is progressing, the feeding oil cylinder 2 needs to bear the impact load of reciprocating changes, which causes the pressure of the second pressure oil circuit 7b to vary with the load. Unstable operation, easy to cause safety accidents
[0013] In addition, the spool of the electromagnetic reversing valve 5 is a spool valve structure, which has internal leakage, and cannot reliably ensure that the main spool 7d of the two-way cartridge valve is leak-free and sealed.
Method used
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[0032] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.
[0033] Such as Figure 4 As shown, the hydraulic control device for rapid switching of the flow rate and pressure of the periodic pipe mill of the present invention includes a first oil inlet pipeline 17a, a second oil inlet pipeline 17b, a first oil outlet pipeline 17e, an oil return pipeline 100, a first two-way The cartridge valve 17, the first reversing valve 13, the second two-way cartridge valve 15, the second reversing...
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The invention provides a flow and pressure quick-switching hydraulic control device of a pilger pipe mill. The flow and pressure quick-switching hydraulic control device of the pilger pipe mill comprises a first oil inlet pipeline, a second oil inlet pipeline, a first oil outlet pipeline, an oil returning pipeline, a first two-way cartridge valve, a first reversing valve, a second two-way cartridge valve, a second reversing valve, a first fluidic resistor and a one-way throttling valve, wherein the second oil inlet pipeline is connected with the first oil outlet pipeline; an oil inlet of the first two-way cartridge valve is connected with the first oil inlet pipeline; a spring cavity of the first two-way cartridge valve can be selectively connected with the first oil inlet pipeline or the oil returning pipeline by the first reversing valve; the flow of hydraulic oil flowing out of the spring cavity can be limited by the one-way throttling valve; an oil inlet of the second two-way cartridge valve is connected between the first fluidic resistor and the one-way throttling valve; an oil outlet of the second two-way cartridge valve is connected with the first oil outlet pipeline; and a spring cavity of the second two-way cartridge valve is connected with the first oil inlet pipeline or the oil returning pipeline selectively by the second reversing valve. The invention also provides a corresponding pilger pipe mill.
Description
technical field [0001] The invention relates to a hydraulic control system, in particular to a periodic pipe rolling mill and a hydraulic control device for rapid switching of flow and pressure thereof. Background technique [0002] The periodic pipe rolling mill is an important equipment for the production of seamless steel pipes. The hydraulic control system of the periodic pipe rolling mill is mainly used to realize the adjustment and locking of the main engine of the periodic pipe rolling mill; the lifting of the exit roller table and the feeding and rolling of the feeder and other technological actions. see figure 1 and figure 2 , The feeding and rolling of the feeder 1 is realized by the specific technological action of the feeding cylinder 2. details as follows: [0003] The feeder 1 sends the threaded capillary tube 3 to the periodic pipe rolling mill 4 for rolling at a certain feed rate, and the feeding force and feed rate of the feeder 1 are provided by the fe...
Claims
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IPC IPC(8): F15B13/06
CPCF15B13/06F15B2211/4053
Inventor 姜浩志
Owner TAIYUAN HEAVY IND