CN211039232U - High-precision hydraulic control butterfly valve hydraulic cylinder for adjusting switching time - Google Patents

Abstract

The high-precision switching time adjustment hydraulic control butterfly valve hydraulic cylinder comprises a cylinder head, a cylinder barrel and a cylinder bottom, wherein a piston rod is arranged in the cylinder barrel, a speed regulating valve is longitudinally arranged above the cylinder bottom, a quick closing rod is arranged on the side surface of the speed regulating valve, the speed regulating valve and the quick closing rod are connected with the cylinder bottom through threads to form a speed regulating valve throttling loop, and an angle rod is positioned in the cylinder bottom and is vertical to the quick closing rod; the speed regulating valve regulates the slow flow rate, controls the oil discharging speed in the cylinder body and controls the running speed of the hydraulic cylinder. The utility model discloses to close the valve and divide fast, two stages slowly, the anterior segment is for closing fast, and the back end is for closing slowly, adjusts fast, closing time and angle slowly as required, avoids and reduces the refluence of medium among the pipe-line system and produces too big water hammer, protects the pipe-line system, and safe and reliable guarantees the normal work of liquid accuse butterfly valve.

Description

High-precision hydraulic control butterfly valve hydraulic cylinder for adjusting switching time

Technical Field

The utility model relates to the field of hydraulic technology, especially, relate to high accuracy on-off time adjusts liquid accuse butterfly valve pneumatic cylinder.

Background

The hydraulic control butterfly valve is one of butterfly valves, is suitable for water pump outlets and inlet pipelines of water turbines, and is used as a closed valve and a check valve to avoid and reduce backflow of media in a pipeline system and generate overlarge water hammer so as to protect the pipeline system.

According to the working principle of the hydraulic butterfly valve cylinder, the hydraulic butterfly valve cylinder has the function of speed regulation at high and low speeds when the valve is closed; the slow joint flow valve which is directly communicated with the oil port at the bottom of the cylinder needs to be closed tightly, so that the hydraulic oil accumulated in the rodless cavity can only flow back to a system loop through the regulating valve, if an operator closes the fast joint flow valve by misoperation, the hydraulic oil in the rodless cavity cannot flow back to the system loop, and the hydraulic oil blocked in the regulating valve generates high pressure to cause explosion of the cylinder bottom, thereby causing serious safety accidents. The hydraulic cylinder of the common hydraulic control butterfly valve has high potential safety hazard. Patent No. CN201020699934.6 discloses a hydraulic cylinder for a hydraulic control butterfly valve. The cylinder head comprises main parts of a regulating valve, a shutoff valve, a one-way valve, a cylinder bottom, a flange, an integral piston, a cylinder barrel, a shaft pin, a cylinder head and an earring; the regulating valve is in threaded connection with the cylinder bottom, the cylinder bottom is in threaded connection with the flange through a screw, the cylinder barrel is in threaded connection with the flange, the shaft pin is in threaded connection with the flange through a screw, the cylinder head is in threaded connection with the shaft pin, the integral piston is in threaded connection with the earring, and the integral piston is arranged in the cylinder barrel; a gap is formed between the throttle rod connected with the regulating valve and the throttle valve hole. In the prior art, the clearance is completely ensured by depending on tolerance matching and slide tolerance of large-scale machined parts, and the control of oil liquid flow is realized, but the number of workpieces and matched parts is too large, so that the accurate effect is difficult to achieve, the cost is high, the test is always qualified, and a lot of problems of incapability of control occur in batch production; the utility model discloses a security is high, and convenient operation is simple, long service life. When the hydraulic cylinder of the technology is in a slow closing stage, a slow closing throttle rod loop is adopted, the slow closing time is unstable, and the slow closing time is easy to change due to the change of temperature and pressure, so that the change of the slow closing time is huge.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be, overcome prior art and close the unstable, change big defect of time slowly, provide a high accuracy on-off time adjusts liquid accuse butterfly valve pneumatic cylinder. The backflow of media in the pipeline system and the overlarge water hammer are avoided and reduced, the pipeline system is protected, and the normal work of the hydraulic control butterfly valve is guaranteed.

The technical scheme of the utility model, high accuracy on-off time adjusts liquid accuse butterfly valve pneumatic cylinder, including cylinder head, cylinder end, the piston rod is equipped with governing valve throttle return circuit in the cylinder the inside, and cylinder end top vertically is equipped with the governing valve, and the governing valve side is equipped with fast closing rod, and the threaded connection cylinder end is crossed to governing valve and fast closing rod, and the angle pole is located the cylinder end and closes the pole perpendicularly fast, adopts the governing valve to adjust and close the flow slowly. The speed of fluid exhaust in the control cylinder body, control pneumatic cylinder functioning speed, the piston can adjust the distance of closing fast through the angle pole when beginning to move, after adjusting the pole and contacting with the piston rod, fluid can only flow through the governing valve to realize the speed of accurate control pneumatic cylinder.

The utility model discloses owing to adopt the governing valve throttle return circuit, accurate servo feedback fine motion in through the governing valve, make slow time of closing no longer receive the temperature, the change of pressure changes, protect liquid accuse butterfly valve pipe-line system better, can adjust soon according to the user's needs, close time and angle slowly, hydraulic system is equipped with automatic pressurize of opening valve and automatic re-setting function, automatic pressurize and stop pin locking duplicate protection have, the liquid accuse butterfly valve is opened and is leaned on the water pump, lean on the energy storage ware when closing, occupation space is little, high durability and convenient installation, compact structure, electrical control adopts general type control and P L C control according to the user's needs, realize the pump valve linkage, and can realize remote control and computer joint control on the spot.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic diagram of the present invention entering a slow-closing phase;

FIG. 3 is a schematic sectional view of the cylinder bottom of the present invention;

in the figure: 1. the cylinder comprises a cylinder head, 2 parts of a piston rod, 3 parts of a cylinder barrel, 4 parts of a cylinder bottom, 5 parts of a speed regulating valve, 6 parts of a quick closing rod and 7 parts of an angle rod.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. The embodiments and descriptions of the present invention are provided for explaining the present invention, and do not constitute an undue limitation on the present invention.

As shown in figure 1, the high-precision switching time adjustment hydraulic control butterfly valve hydraulic cylinder comprises a cylinder head 1, a piston rod 2, a cylinder barrel 3, a cylinder bottom 4, a speed regulating valve 5, a quick closing rod 6 and an angle rod 7. Wherein the piston rod 2 is arranged in the cylinder barrel 3, and the cylinder head 1 is connected with the cylinder barrel 3 and the cylinder bottom 4 through screws. The upper part of the cylinder bottom 4 is longitudinally provided with a speed regulating valve 5, the side surface of the speed regulating valve 5 is provided with a quick closing rod 6, the speed regulating valve 5 and the quick closing rod 6 are connected with the cylinder bottom 4 through threads, and an angle rod 7 is positioned in the cylinder bottom 4 and is vertical to the quick closing rod 6. When the hydraulic control butterfly valve hydraulic cylinder works, the hydraulic cylinder of the hydraulic control butterfly valve is in a quick closing stage initially, and oil in a large cavity of the hydraulic cylinder flows back to an oil tank through the quick closing rod 6. Fig. 2 shows that the hydraulic cylinder of the hydraulic control butterfly valve enters a slow closing stage schematic diagram, at the moment, the angle rod 7 is inserted into the tail part of the piston rod 2, the oil hole of the fast closing rod 6 is closed, and oil in the large cavity can only flow back to the oil tank through the speed regulating valve 5, so that the accurate control of the slow closing stage is realized, a pipeline system is better protected, and the normal work of the hydraulic control butterfly valve is ensured. The speed regulating valve 5 regulates the slow-closing flow, controls the speed of oil liquid in the cylinder body to be discharged, and controls the running speed of the hydraulic cylinder. The distance that can adjust fast through the angle pole when the piston began to move, after adjusting the pole and contacting with the piston rod, fluid can only flow through the governing valve to the effect of accurate control pneumatic cylinder speed has been realized.

Claims (1)

1. High accuracy on-off time adjusts liquid accuse butterfly valve pneumatic cylinder, including cylinder head (1), cylinder (3), cylinder end (4), piston rod (2) in cylinder (3) the inside, its characterized in that: the hydraulic cylinder is provided with a speed regulating valve throttling loop, a speed regulating valve (5) is longitudinally arranged above the cylinder bottom (4), a quick closing rod (6) is arranged on the side surface of the speed regulating valve (5), the speed regulating valve (5) and the quick closing rod (6) are connected with the cylinder bottom (4) through threads, and an angle rod (7) is positioned in the cylinder bottom (4) and is vertical to the quick closing rod (6); the speed regulating valve (5) regulates the slow-closing flow, controls the speed of oil liquid in the cylinder body to be discharged, and controls the running speed of the hydraulic cylinder.

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