CN103846403A - Pressure-reducing and pressure-maintaining loop hydraulic system of tube drawing clamp - Google Patents
Pressure-reducing and pressure-maintaining loop hydraulic system of tube drawing clamp Download PDFInfo
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- CN103846403A CN103846403A CN201210509913.7A CN201210509913A CN103846403A CN 103846403 A CN103846403 A CN 103846403A CN 201210509913 A CN201210509913 A CN 201210509913A CN 103846403 A CN103846403 A CN 103846403A
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Abstract
The invention relates to a pressure-reducing and pressure-maintaining loop hydraulic system of a tube drawing clamp. The pressure-reducing and pressure-maintaining loop hydraulic system comprises a quantitative hydraulic pump, a two-position two-way electromagnetic reversing valve, a three-position four-way electro-hydraulic reversing valve, a pilot overflow valve, a pressure gauge and an energy storage device, wherein the quantitative hydraulic pump is serially connected with a one-way valve, the one-way valve is connected with the three-position four-way electro-hydraulic reversing valve, the pressure gauge and the pilot overflow valve are arranged between the one-way valve and the three-position four-way electro-hydraulic reversing valve, and the pilot overflow valve is connected with the two-position two-way electromagnetic reversing valve; the three-position four-way electro-hydraulic reversing valve is directly connected with a hydraulic cylinder, a pressure reducing valve is arranged between the three-position four-way electro-hydraulic reversing valve and the hydraulic cylinder, and the pressure reducing valve is connected with the one-way valve in parallel; the energy storage device and the pressure gauge are arranged between the pressure reducing valve and the hydraulic cylinder in a serial-connection manner. The pressure-reducing and pressure-maintaining loop hydraulic system is simple in structure, stable in pressure, reliable in performance and less in system heat.
Description
Technical field
The present invention relates to hydraulic technique field, relate in particular to and be applied to the decompression of tube drawing pliers and the hydraulic system of pressure dwelling loop in centrifugal casting machine.
Background technology
Force pipe centrifugal casting machine is made up of eight major parts such as machine driven system, Hydraulic Power Transmission System, PC control system, spray equipment, apparatus for pouring, cooling device, tube drawing mechanism and nozzle mechanisms.Except the running of casting mold adopts roller frictional drive, the spray of this machine is drawn advancing of dolly and casting bogie and is retreated, the tensioning of tube drawing pliers with unclamp, the transposition of spray gun and tube drawing pliers, going to work of fan-shaped casting ladle and pipe connector completes by hydraulic drive with the action such as reset.In order to ensure the productivity ratio of machine and the quality of institute's cast tube, when tube drawing pliers stretches into the interior tube drawing of casting mold, there is enough large withdrawing pattern power and prevent that tube drawing pliers from skidding, a pincers loop has pressurize and decompression.
Summary of the invention
The present invention is directed to above-mentioned shortcoming of the prior art, a kind of tube drawing pliers decompression and pressure dwelling loop hydraulic system are provided, it is simple in structure, pressure stability, and dependable performance, system heating is few.
The technical solution adopted in the present invention is as follows:
Tube drawing pliers decompression and pressure dwelling loop hydraulic system, comprise quantitative hydraulic pump, bi-bit bi-pass solenoid directional control valve, 3-position 4-way electro-hydraulic reversing valve, pilot operated compound relief valve, Pressure gauge and accumulator, quantitative hydraulic pump is connected with check valve, check valve is connected with 3-position 4-way electro-hydraulic reversing valve, between check valve and 3-position 4-way electro-hydraulic reversing valve, be connected with Pressure gauge and pilot operated compound relief valve, pilot operated compound relief valve is connected with a bi-bit bi-pass solenoid directional control valve; 3-position 4-way electro-hydraulic reversing valve is directly connected with hydraulic cylinder, is connected with a pressure-reducing valve between 3-position 4-way electro-hydraulic reversing valve and hydraulic cylinder, and pressure-reducing valve is in parallel with a check valve; Between pressure-reducing valve and hydraulic cylinder, be in series with accumulator and Pressure gauge.
The invention has the advantages that: the charge oil pressure of system is observed by Pressure gauge, check valve can prevent that hydraulic oil from pouring in down a chimney; The direction of motion of hydraulic cylinder can prevent that by check valve fluid from pouring in down a chimney; The direction of motion of hydraulic cylinder is by the control of 3-position 4-way electro-hydraulic reversing valve, accumulator is for the pressurize of system, can make the pressure of a pincers keep stable, in the time of needs pressurize, accumulator is supplied out the pressure oil storing, and bucking-out system is leaked, maintain system pressure, adopt accumulator to carry out pressurize, pressure maintaining performance is reliable, has reduced idle energy consumption and system heating simultaneously.
Brief description of the drawings
Fig. 1 is hydraulic schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
As shown in Figure 1, the present invention includes and comprise quantitative hydraulic pump 1, bi-bit bi-pass solenoid directional control valve 3,3-position 4-way electro-hydraulic reversing valve 5, pilot operated compound relief valve 4, Pressure gauge and accumulator 10, quantitative hydraulic pump 1 is connected with check valve 2, check valve 2 is connected with 3-position 4-way electro-hydraulic reversing valve 5, between check valve 2 and 3-position 4-way electro-hydraulic reversing valve 5, be connected with Pressure gauge 11 and pilot operated compound relief valve 4, pilot operated compound relief valve 4 is connected with a bi-bit bi-pass solenoid directional control valve 3; 3-position 4-way electro-hydraulic reversing valve 5 is directly connected with hydraulic cylinder 6, is connected with a pressure-reducing valve 7 between 3-position 4-way electro-hydraulic reversing valve 5 and hydraulic cylinder, and pressure-reducing valve 7 is in parallel with a check valve 8; Between pressure-reducing valve 7 and hydraulic cylinder 6, be in series with accumulator 10 and Pressure gauge 9.
More than describing is explanation of the invention, is not the restriction to invention, and limited range of the present invention, referring to claim, within protection scope of the present invention, can be done any type of amendment.
Claims (1)
1. tube drawing pliers decompression and pressure dwelling loop hydraulic system, comprise quantitative hydraulic pump (1), bi-bit bi-pass solenoid directional control valve (3), 3-position 4-way electro-hydraulic reversing valve (5), pilot operated compound relief valve (4), Pressure gauge and accumulator (10), it is characterized in that: quantitative hydraulic pump (1) is connected with check valve (2), check valve (2) is connected with 3-position 4-way electro-hydraulic reversing valve (5), between check valve (2) and 3-position 4-way electro-hydraulic reversing valve (5), be connected with Pressure gauge (11) and pilot operated compound relief valve (4), pilot operated compound relief valve (4) is connected with a bi-bit bi-pass solenoid directional control valve (3), 3-position 4-way electro-hydraulic reversing valve (5) is directly connected with hydraulic cylinder (6), between 3-position 4-way electro-hydraulic reversing valve (5) and hydraulic cylinder, be connected with a pressure-reducing valve (7), pressure-reducing valve (7) is in parallel with a check valve (8), between pressure-reducing valve (7) and hydraulic cylinder (6), be in series with accumulator (10) and Pressure gauge (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210509913.7A CN103846403A (en) | 2012-11-30 | 2012-11-30 | Pressure-reducing and pressure-maintaining loop hydraulic system of tube drawing clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210509913.7A CN103846403A (en) | 2012-11-30 | 2012-11-30 | Pressure-reducing and pressure-maintaining loop hydraulic system of tube drawing clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103846403A true CN103846403A (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210509913.7A Pending CN103846403A (en) | 2012-11-30 | 2012-11-30 | Pressure-reducing and pressure-maintaining loop hydraulic system of tube drawing clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103846403A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763690A (en) * | 2015-03-25 | 2015-07-08 | 苏州福润机械有限公司 | Unloading loop valve under stable system pressure |
| CN104847721A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Pressure-maintaining control device and engineering machine with same |
| CN105522435A (en) * | 2014-10-17 | 2016-04-27 | 三菱重工业株式会社 | Pressure maintaining apparatus, machine tool, and method of running pressure maintaining apparatus in machine tool |
-
2012
- 2012-11-30 CN CN201210509913.7A patent/CN103846403A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105522435A (en) * | 2014-10-17 | 2016-04-27 | 三菱重工业株式会社 | Pressure maintaining apparatus, machine tool, and method of running pressure maintaining apparatus in machine tool |
| CN104847721A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Pressure-maintaining control device and engineering machine with same |
| CN104763690A (en) * | 2015-03-25 | 2015-07-08 | 苏州福润机械有限公司 | Unloading loop valve under stable system pressure |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140611 |