CN206346969U - A kind of hydraulic control system of the fast quick-closing valve of energy - Google Patents

Abstract

The utility model discloses a hydraulic control system capable of quickly closing a valve, wherein a slow-closing hydraulic control circuit is sequentially provided with a one-way valve connected to the oil inlet and a protection valve on the oil inlet and outlet between the oil inlet and the oil outlet. pressure solenoid valve, the main reversing solenoid valve connected to the oil outlet, and the hydraulic lock. The hydraulic lock is connected to a hydraulic cylinder through a pair of one-way throttle valves. A ball valve, a quick-closing solenoid valve is arranged between the main reversing solenoid valve and the oil outlet, and a slow-closing throttle valve is connected in parallel with the quick-closing solenoid valve. The quick-closing hydraulic control circuit includes a quick-closing oil inlet solenoid valve connected to the hydraulic cylinder and the oil inlet, a quick-closing oil return solenoid valve connected to the hydraulic cylinder and the oil outlet, and a quick-closing oil return throttle valve connected Between the quick-closing oil return solenoid valve and the oil outlet. The hydraulic control system can effectively block the oil circuit when it is closed, and there is no internal leakage. The diameter is large, the flow rate is large, the valve closing speed is fast, and the sealing is reliable.

Description

A Hydraulic Control System Capable of Rapid Valve Closing

technical field

The utility model relates to a hydraulic control system, in particular to a fast-closing and slow-closing control system of an oil circuit.

Background technique

At present, the hydraulically controlled slow-closing check butterfly valve is mainly used at the outlet of the water pump in the power plant to shut off the water flow and bear pressure in both directions. It is required to change the butterfly valve of the system to be able to close the valve in two stages of fast closing and slow closing. When the water pump is scheduled to stop, first quickly close the butterfly valve to an opening of about 20°, contact to stop the pump, and then slowly close the valve to the fully closed position. In the fast closing stage, the water pump is running. If the fast closing speed cannot meet the requirements, the current of the water pump will be in an overload state for a long time, and the water pump will alarm to stop the pump, and the water flow will flow backwards, which will damage the water pump.

The existing hydraulic system of the hydraulically controlled slow-closing check butterfly valve utilizes a three-position five-way reversing valve, a hydraulically controlled one-way valve, and a hydraulically controlled one-way throttle valve to superimpose to control the inlet and outlet oil passages of the oil cylinder.

The diameter of the existing three-position five-way reversing valve on the market is only with With two specifications, the requirement of fast valve closing in five seconds cannot be realized on a large-diameter butterfly valve.

Utility model content

The utility model aims at the problems existing in the prior art, and provides a hydraulic control system capable of quickly closing a valve. The hydraulic control system can effectively block the oil circuit when it is closed, and there is no internal leakage. The diameter is large, the flow rate is large, the valve closing speed is fast, and the sealing is reliable.

In order to achieve the above object, the utility model adopts the following technical solutions:

A hydraulic control system capable of quickly closing a valve, comprising a slow-closing hydraulic control circuit and a fast-closing hydraulic control circuit; There are check valves, pressure maintaining solenoid valves, main reversing solenoid valves and hydraulic locks. The hydraulic locks are connected to a hydraulic cylinder through a pair of one-way throttle valves. There is a ball valve; the one-way valve is connected to the oil inlet, and the main reversing solenoid valve is connected to the oil outlet; the fast-closing hydraulic control circuit includes a fast-closing oil inlet solenoid valve and a fast-closing oil return solenoid valve and a quick-closing oil return throttle valve; the quick-closing oil inlet solenoid valve is connected between the hydraulic cylinder and the oil inlet, and the quick-closing oil return solenoid valve is connected between the hydraulic cylinder and the oil outlet, The quick-closing oil return throttle valve is connected between the quick-closing oil return solenoid valve and the oil outlet.

According to the hydraulic control system capable of closing valves quickly, a quick-closing solenoid valve is provided between the main reversing solenoid valve and the oil outlet, and a slow-closing throttle valve is connected in parallel with the quick-closing solenoid valve.

The utility model additionally develops two independent oil inlet and outlet passages on the original three-position five-way oil passage, one is a slow-closing hydraulic control circuit, and the other is a fast-closing hydraulic control circuit. And the on-off of these two oil circuits is controlled by solenoid valves, which can effectively block the oil circuits when they are closed without internal leakage. The diameter is large, the flow rate is large, the valve closing speed is fast, and the sealing is reliable. The utility model also increases pressure throttling in the oil outlet pipeline and adjusts the fast closing time to meet customer requirements.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the utility model and constitute a part of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation of the utility model . In the attached picture:

Fig. 1 is the oil circuit schematic diagram of the utility model hydraulic control system;

Fig. 2 is a schematic diagram of the slow-closing hydraulic control circuit of the hydraulic control system of the utility model.

detailed description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer and clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, a hydraulic control system capable of quickly closing the valve includes a slow-closing hydraulic control circuit and a fast-closing hydraulic control circuit arranged between the oil inlet and the oil outlet.

As shown in Figure 2, the slow-closing hydraulic control circuit is sequentially provided with an oil suction filter 1, a high-pressure gear pump 2, a check valve 4, a pressure-holding electromagnetic Valve 5, main reversing solenoid valve 6, hydraulic lock 7, double one-way throttle valve 8, said double one-way throttle valve 8 is connected to hydraulic cylinder 11 through ball valve 9. The double one-way throttle valve 8 includes a first one-way throttle valve 81 and a second one-way throttle valve 82, and the ball valve 9 includes a first ball valve connecting the first one-way throttle valve 81 and the hydraulic cylinder 11 91, further comprising a second ball valve 92 connecting the second one-way throttle valve 82 and the hydraulic cylinder 11.

In the slow-closing hydraulic control circuit, the oil in the oil tank 18 is introduced by the oil suction filter 1, then passes through the high-pressure gear pump 2, the first high-pressure hose 3 connected between the high-pressure gear pump 2 and the one-way valve 4, After the one-way valve 4, it passes through the pressure maintaining solenoid valve 5 and the main reversing solenoid valve 6 in sequence, and then passes through the first hydraulic control check valve 71 of the hydraulic lock 7 and the first one-way valve of the double one-way throttle valve 8 in sequence. To the throttle valve 81, the second high-pressure hose 10 connected to the first one-way throttle valve 81 and the first ball valve 91, and the hydraulic cylinder 11; pass through the hydraulic cylinder 11, then pass through the second ball valve 92, the first After the second one-way throttle valve 82 and the second hydraulically controlled one-way valve 72 of the hydraulic lock, the oil outlet in the oil tank 18 is communicated through the main reversing solenoid valve 6 . A third high-pressure hose 12 is connected between the second ball valve 92 and the second one-way throttle valve 82 .

The utility model is also provided with a fast-closing solenoid valve 13 between the main reversing solenoid valve 6 and the oil outlet of the fuel tank 18, and the fast-closing solenoid valve 13 is connected with a slow-closing throttle valve 14 in parallel.

As shown in FIG. 1 , the fast-closing hydraulic control circuit includes a fast-closing oil inlet solenoid valve 15 , a fast-closing oil return solenoid valve 16 and a fast-closing oil return throttle valve 17 . The quick-closing oil inlet solenoid valve 15 is connected between the hydraulic cylinder 11 and the oil inlet, specifically, the quick-closing oil inlet solenoid valve 15 is connected to the hydraulic cylinder 11 through the second ball valve 92, and the quick-closing oil inlet solenoid valve 15 is connected to the oil inlet in the oil tank 18 by one-way valve 4. The quick-closing oil return solenoid valve 16 is connected between the hydraulic cylinder 11 and the oil outlet. Specifically, the quick-close oil return solenoid valve 16 is connected to the hydraulic cylinder 11 through the first ball valve 91. The quick-close oil return solenoid valve 16 Connect the oil outlet in the oil tank 18 by closing the oil return throttle valve 17 quickly.

In the fast-closing hydraulic control circuit, the oil in the oil tank 18 is introduced by the oil suction filter 1, and passes through the high-pressure gear pump 2, the first high-pressure hose 3 connected between the high-pressure gear pump 2 and the one-way valve 4, After the check valve 4, through the quick-closing oil inlet solenoid valve 15, the second ball valve 92, the hydraulic cylinder 11, the first ball valve 91, the quick-closing oil return solenoid valve 16 and the quick-closing oil return throttle valve 17, the Into the oil outlet in the oil tank 18.

The above description shows and describes the preferred embodiments of the present utility model. As mentioned above, it should be understood that the present utility model is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various Various other combinations, modifications and environments can be made within the scope of the utility model concept described herein, through the above teachings or the technology or knowledge in the related field. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the utility model, and should all be within the protection scope of the appended claims of the utility model.

Claims (2)

1. a kind of hydraulic control system of the fast quick-closing valve of energy, it is characterised in that：Including a Slow Close hydraulic control loop and a quick closing valve hydraulic control loop； It is described

Check valve, pressurize magnetic valve, master are sequentially provided with Slow Close hydraulic control loop, the inlet and outlet of fuel channel between oil inlet and oil-out Reversing solenoid valve, hydraulic lock, described hydraulic lock connect a hydraulic cylinder by a Double throttle check valve, in the hydraulic cylinder and double lists To between choke valve be provided with ball valve；Described check valve connection oil inlet, described main reversing solenoid valve connection oil-out；

Quick closing valve hydraulic control loop, including a quick closing valve enter solenoid, a quick closing valve oil return solenoid valve and a quick closing valve meter out valve；It is described Quick closing valve enter solenoid and be connected between hydraulic cylinder and oil inlet, described quick closing valve oil return solenoid valve is connected to hydraulic cylinder with going out Between hydraulic fluid port, described quick closing valve meter out valve is connected between quick closing valve oil return solenoid valve and oil-out.

2. a kind of hydraulic control system of the fast quick-closing valve of energy as claimed in claim 1, it is characterised in that：The main reversing solenoid valve and Magnetic valve is closed soon provided with one between oil-out, and this closes magnetic valve and is also parallel with a Slow Close choke valve soon.