CN1327153C

CN1327153C - Two speed hydraulic cylinder for valve

Info

Publication number: CN1327153C
Application number: CNB2004100468658A
Authority: CN
Inventors: 李志鹏; 金志渊; 林加钱; 林永通
Original assignee: CHINA DAZHONG VALVE Co Ltd
Current assignee: CHINA DAZHONG VALVE Co Ltd
Priority date: 2004-10-26
Filing date: 2004-10-26
Publication date: 2007-07-18
Anticipated expiration: 2024-10-26
Also published as: CN1605785A

Abstract

The present invention belongs to a double-speed hydraulic cylinder with fast and slow drives, and fast and slow controls, which is composed of a cylinder body, a sealing ring, a piston, a slow chamber, a piston rod, an upper end cover, a lower end cover, a sealing pad, a speed-regulating valve, a transition chamber, a fast chamber and a signal rod, wherein the lower end cover is pressed on one end face of the cylinder body through the piston rod, and the upper end cover is pressed on the other end face of the cylinder body through the signal rod. The fast chamber, the transition chamber and the slow chamber are arranged in the cylinder body; the lower end cover is provided with a thread through hole which is communicated with the slow chamber, and the upper end cover is provided with a thread through hole which is communicated with the fast chamber. The double-speed hydraulic cylinder with fast and slow drives, and fast and slow controls, which is provided by the present invention, is used for the opening and closing controls of a valve, the valve can be opened fast and slowly and closed fast and slowly simply by one valve plate, and oil is filled in the hydraulic cylinder; the present invention has the advantages of cleanness, simplicity and use reliability enhancement.

Description

Valve double speed control oil hydraulic cylinder

Technical field:

The invention belongs to a kind of valve dual-speed hydraulic cylinder that has soon, drives slowly and control.

Background technique:

In having the self-powering type multifunctional water force control valve that two stages closed, the general single speed oil hydraulic cylinder that adopts cooperates the realization quick closing valve, closes slowly with large and small two valve plates, when closing, close cooperation to guarantee pump by two stages of speed, realize eliminating pass valve water hammer function and check function, the big valve plate of this class valve can float in valve body, and by flow direction in the valve body and its residing position of pressure size decision, and little valve plate generally is connected with the single speed oil hydraulic cylinder by driving mechanism, be subjected to Driven by Hydraulic Cylinder and control, two chambeies of oil hydraulic cylinder are communicated with the entrance end of valve respectively.Liquid in the oil hydraulic cylinder is to derive from the liquid of carrying in the valve body, thereby the driving force of oil hydraulic cylinder just comes from valve inlet/outlet two place's hydraulic pressure with control power.There is the problem of following aspect in this class valve: the one, and liquid is unclean in the oil hydraulic cylinder, various foreign material in the valve body may enter oil hydraulic cylinder at any time, liquid itself may be just unclean, as carry the valve of all kinds of water, cause piston in hydraulic cylinder sealing wear, casing wall wearing and tearing etc., so just cause the piston two ends to be leaked, and make oil hydraulic cylinder lose drive controlling power and lost efficacy, cause the pipe-line system fault; The 2nd, large and small valve plate cooperates goes up complexity, and the sealing level is many, poor reliability; The 3rd, the big valve plate that floats will occupy certain free air space, be vibrated when making in the valve body flow of fluid, produce big resistance, and will make liquid produce pressure surge, and then produce pipeline noise and disturbance, influence pipe-line system safety.

Summary of the invention:

Technical problem to be solved by this invention is to be to provide a kind of dual-speed hydraulic cylinder that has soon, drives slowly and control, be used for the keying control of valve, only need just can realize opening slowly, open soon, quick closing valve, close slowly with a valve plate, and oil-filled in oil hydraulic cylinder, have cleaning, simple, reliable advantage.

The present invention solves its technical problem and adopts following technological scheme:

The present invention is by cylinder body, seal ring, piston, chamber at a slow speed, piston rod, two pipe joints, upper end cap, lower end cap, pipe fitting, sealing gasket, series flow control valve, adapter cavity, connecting pin, quick chamber, connecting screw rod, nut, and signal pole is formed, seal ring is housed on the piston, piston hole is crossed to cooperate to be contained in and is also used nut fastening on the piston rod, signal pole is connected with piston rod by connecting pin, piston is packed in the cylinder body, seal ring is housed on the lower end cap, lower end cap passes on the end face that piston rod is pressed in cylinder body, seal ring also is housed on the upper end cap, upper end cap passes on the other end that signal pole is pressed in cylinder body, use connecting screw rod, nut is with upper end cap, cylinder body and lower end cap tighten together, quick chamber is arranged in the cylinder body, adapter cavity, chamber at a slow speed, the inwall and the gap between the piston in chamber are big fast, the inwall in chamber and the gap between the piston are little at a slow speed, there is tapped through hole to be communicated with on the lower end cap with chamber at a slow speed, there is tapped through hole to be communicated with on the upper end cap with quick chamber, a pipe joint is contained on the upper end cap, another pipe joint is contained on the lower end cap, pipe fitting is connected with two pipe joints, and series flow control valve is housed on the pipe fitting.

When piston is in quick chamber the topmost part, piston rod is applied an external force that is directed downwards, because the gap is big between piston and the inboard wall of cylinder block, the cylinder inner fluid flows in cylinder interior, liquid is very little to the piston motion damping function in the cylinder, piston will move downward fast by adapter cavity and reach top, chamber at a slow speed, finish the downward rapid movement stage, after piston enters at a slow speed the chamber, because the gap is very little between piston and the inboard wall of cylinder block, and because the effect of seal ring is with on the piston, two chamber liquid separate fully down, the cylinder inner fluid produces big drag effect to piston motion, and the movement velocity of piston reduces rapidly, along with piston moves downward, piston cavity of resorption liquid passes through pipe joint, pipe fitting, pipe joint flows into piston upper chamber, end bottom to chamber at a slow speed until piston motion, finish the microinching stage that moves downward, by regulating the aperture of series flow control valve, can control piston cavity of resorption liquid to the piston upper chamber traffic flow, can control piston movement velocity in chamber at a slow speed.

When piston is at a slow speed the chamber bottom the time, on piston rod, apply the power that a direction makes progress, piston will begin upwards moving in the chamber at a slow speed, because the gap is very little between piston and the inboard wall of cylinder block, and seal ring is separated upper and lower two chambeies of piston, liquid produces big drag effect to the motion of piston in the cylinder, makes the piston speed that moves upward slower.At this moment, piston upper chamber liquid flows into the piston cavity of resorption by pipe joint, pipe fitting, pipe joint, and the aperture of regulating series flow control valve can the regulating piston epicoele flows into the flow of cavity of resorption liquid, promptly reaches the move upward purpose of speed of regulating piston.When piston motion during to adapter cavity, piston has been finished the microinching stage that moves upward.After piston entered adapter cavity, because the crack increases between piston and the inboard wall of cylinder block, liquid reduced rapidly the movement resistor effect of piston in the cylinder, and piston is accelerated movement velocity rapidly, and the quick chamber of very fast arrival the topmost part is finished the rapid movement function that piston moves upward.

The dual-speed hydraulic cylinder that has soon, drives slowly and control provided by the present invention is used for the keying control of valve, only needs just can realize opening slowly, open soon, quick closing valve, close slowly with a valve plate, and oil-filled in oil hydraulic cylinder cleaning, simple and improved operational safety.

Description of drawings:

Fig. 1 is an overall construction drawing of the present invention.

The installation drawing that Fig. 2 is used in the rise-fall type valve for the present invention.

The installation drawing that Fig. 3 is used in rotary valve for invention.

Embodiment:

The present invention is by cylinder body 1,

seal ring

2,5,21, piston 3, the chamber 4 at a slow speed, piston rod 6, first pipe joint 7, second pipe joint 20, lower end cap 8, upper end cap 18, pipe fitting 9, sealing

gasket

10,17, series flow control valve 11, adapter cavity 12, connecting pin 14, quick chamber 15, connecting screw rod 16,

nut

13,19 and signal pole 22 form, seal ring 2 is housed on the piston 3, piston 3 cooperates to be contained in by the hole also uses nut 13 fastening on the piston rod 6, signal pole 22 is connected with piston rod 6 by connecting pin 14, and piston 3 is packed in the cylinder body 1, seal ring 5 is housed on the lower end cap 8, lower end cap 8 passes on the end face that piston rod 6 is pressed in cylinder body 1, and seal ring 21 is housed on the upper end cap 18, and upper end cap 18 passes on the other end that signal pole 22 is pressed in cylinder body 1, with connecting screw rod 16, nut 19 is with lower end cap 8, cylinder body 1, upper end cap 18 tightens together, quick chamber 15 is arranged in the cylinder body 1, adapter cavity 12, the chamber 4 at a slow speed, and the inwall and the gap between the piston 3 in chamber 15 are big fast, and the gap between the inwall in chamber 4 and the piston 3 is little at a slow speed, there is tapped through hole to be communicated with on the lower end cap 8 with chamber 4 at a slow speed, have tapped through hole to be communicated with quick chamber 15 on the upper end cap 18, first pipe joint 7 is contained on the lower end cap 8, and second pipe joint 20 is contained on the upper end cap 18, the pipe fitting 9 and first pipe joint 7, second pipe joint 20 connects, and series flow control valve 11 is housed on the pipe fitting 9.

The present invention with said structure can realize its function under external force.

When piston 3 is in quick chamber 15 the topmost parts, piston rod 6 is applied an external force that is directed downwards, because the gap is big between piston 3 and cylinder body 1 inwall, the cylinder inner fluid flows in cylinder interior, liquid is very little to the piston motion damping function in the cylinder, piston 3 will move downward fast by adapter cavity 12 and reach 4 tops, chamber at a slow speed, finish the downward rapid movement stage, after piston 3 enters at a slow speed chamber 4, because the gap is very little between piston 3 and cylinder body 1 inwall, and because the effect of seal ring 2 is with on the piston 3, two chamber liquid separate fully down, 3 motions produce big drag effect to the cylinder inner fluid to piston, the movement velocity of piston 3 reduces rapidly, along with piston 3 moves downward, piston 3 cavity of resorption liquid are by pipe joint 7, pipe fitting 9, pipe joint 20 flows into piston 3 epicoeles, moving at a slow speed chamber 4 until piston 3 ends bottom, finish the microinching stage that moves downward, by regulating the aperture of series flow control valve 11, can control piston 3 cavity of resorption liquid to piston 3 epicoele traffic flows, can control piston 3 movement velocity in chamber 4 at a slow speed.

When piston 3 is at a slow speed chamber 4 bottom the time, on piston rod 6, apply the power that a direction makes progress, piston 3 will begin upwards moving in the chamber 4 at a slow speed, because the gap is very little between piston 3 and cylinder body 1 inwall, and seal ring 2 is separated piston 3 upper and lower two chambeies, liquid produces big drag effect to the motion of piston 3 in the cylinder, makes piston 3 speed that moves upward slower.At this moment, piston 3 epicoele liquid flow into pistons 3 cavity of resorptions by second pipe joint 20, pipe fitting 9, first pipe joint 7, and the aperture of regulating series flow control valve 11 can regulating piston 3 epicoeles flows into the flow of cavity of resorption liquid, promptly reach the move upward purpose of speed of regulating piston 3.When piston 3 moved to adapter cavity 12, piston 3 had been finished the microinching stage that moves upward.After piston 3 enters adapter cavity 12, because the crack increases between piston 3 and the inboard wall of cylinder block, liquid reduces rapidly the movement resistor effect of piston 3 in the cylinder, and piston 3 is accelerated movement velocity rapidly, and the quick chamber of very fast arrival 13 the topmost parts are finished the rapid movement function that piston 3 moves upward.

Claims

1, a kind of valve double speed control oil hydraulic cylinder, by cylinder body (1), seal ring (2,5,21), piston (3), chamber (4) at a slow speed, piston rod (6), first pipe joint (7), second pipe joint (20), lower end cap (8), upper end cap (18), pipe fitting (9), sealing gasket (10,17), series flow control valve (11), adapter cavity (12), connecting pin (14), quick chamber (15), connecting screw rod (16), nut (13,19) and signal pole (22) form, it is characterized in that being equipped with on the piston (3) seal ring (2), piston (3) cooperates by the hole and is contained in that piston rod (6) is gone up and fastening with nut (13), signal pole (22) is connected with piston rod (6) by connecting pin (14), piston (3) is packed in the cylinder body (1), seal ring (5) is housed on the lower end cap (8), lower end cap (8) passes piston rod (6) and is pressed on the end face of cylinder body (1), seal ring (21) is housed on the upper end cap (18), upper end cap (18) passes signal pole (22) and is pressed on the other end of cylinder body (1), with connecting screw rod (16), nut (19) is with lower end cap (8), cylinder body (1), upper end cap (18) tightens together, quick chamber (15) is arranged in the cylinder body (1), adapter cavity (12), chamber (4) at a slow speed, the inwall and the gap between the piston (3) in chamber (15) are big fast, gap between the inwall of chamber (4) and the piston (3) is little at a slow speed, has tapped through hole to be communicated with chamber (4) at a slow speed on the lower end cap (8), has tapped through hole to be communicated with chamber (15) fast on the upper end cap (18), first pipe joint (7) is contained on the lower end cap (8), second pipe joint (20) is contained on the upper end cap (18), pipe fitting (9) and first pipe joint (7), second pipe joint (20) connects, and series flow control valve (11) is housed on the pipe fitting (9).