Hydraulic control device of hydraulic control butterfly valve

Abstract

The utility model discloses a hydraulic control device for a hydraulic control butterfly valve, and relates to the technical field of hydraulic control devices. The hydraulic control device comprises a variable frequency motor, a coupler, an oil pump and an energy accumulator; an oil pump inlet filter screen is installed at an inlet of the oil pump, an oil pump outlet overflow valve is installed at an outlet of the oil pump, and an oil pump outlet filter screen is arranged at the end, away from the oil pump inlet filter screen, of the outlet of the oil pump. A first one-way valve is arranged at the output end of the oil pump outlet filter screen, the energy accumulator is connected with the first one-way valve through an energy accumulator inlet manual valve, and a pressure release valve is arranged at the output end of the energy accumulator. And the operation stability of the circulating water system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control devices, in particular to a hydraulic control device for a hydraulically controlled butterfly valve. Background Art

[0002] The hydraulic control device is located in the outlet well of the circulating water pump. The hydraulic components are old and have low reliability. The hydraulic system has a short pressure-maintaining time and the oil pump is frequently pressurized, which affects the operating stability of the circulating water system. Utility Model Content

[0003] The embodiment of the present application solves the problems of short pressure holding time and frequent pressure application of the oil pump in the prior art by providing a hydraulic control device for a hydraulically controlled butterfly valve, thereby improving the operating stability of the circulating water system.

[0004] The embodiment of the present application provides a hydraulic control device for a hydraulically controlled butterfly valve, comprising:

[0005] A variable frequency motor, a coupling, an oil pump and an accumulator, wherein the variable frequency motor is connected to the oil pump through a coupling; the coupling is used to transmit the rotational torque of the variable frequency motor to the oil pump, an oil pump inlet filter is installed at the inlet of the oil pump, an oil pump outlet overflow valve is installed at the outlet of the oil pump, and an oil pump outlet filter is installed at the end of the outlet of the oil pump away from the oil pump inlet filter; a check valve 1 is arranged at the output end of the oil pump outlet filter, the accumulator is connected to the check valve 1 through the accumulator inlet manual valve, and a pressure relief valve is arranged at the output end of the accumulator.

[0006] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0007] The coordinated use of the variable frequency motor and the coupling achieves stable and controllable power transmission, ensuring that the oil pump can work stably.

[0008] The setting of the oil pump inlet filter and the oil pump outlet filter effectively filters the impurities in the oil circuit, protects the oil pump and other hydraulic components, and improves the stability and service life of the system.

[0009] The oil pump outlet relief valve is used to control the maximum pressure of the oil pump outlet to prevent system overload.

[0010] The accumulator is connected through the accumulator inlet manual valve, which can quickly release the stored energy to maintain the system pressure stability when the system demand oil pressure increases instantaneously.

[0011] The setting of the pressure relief valve ensures that the system can release pressure in time under abnormal circumstances and protect the hydraulic device from damage.

[0012] As an auxiliary oil supply device, the manual pump can provide emergency oil supply in the event of a main oil pump failure or power outage to ensure the continued operation of the hydraulic system.

[0013] The coordinated use of the cartridge valve and the hydraulically controlled one-way valve achieves precise control of the main oil circuit. The one-way valve ensures the one-way flow of the oil circuit and improves the safety of the system.

[0014] The setting of the flow control valve enables the system to adjust the oil flow according to actual needs, improving the flexibility and efficiency of the system.

[0015] The setting of YC2 solenoid valve and YC1 solenoid valve realizes the automatic control of cartridge valves, further improving the intelligence and automation level of the system.

[0016] To sum up, the current solution solves many problems in the hydraulic system, such as power transmission, pressure control, safety protection, emergency operation, oil circuit control and regulation, and automatic control, by comprehensively applying a variety of hydraulic components and control technologies, and achieves efficient, stable, safe and intelligent hydraulic control effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural schematic diagram of a hydraulic control device of a hydraulically controlled butterfly valve.

[0018] In the figure: 1. Oil pump inlet filter; 2. Oil pump outlet relief valve; 3. Frequency conversion motor; 4. Coupling; 5. Oil pump; 6. Manual pump; 7. Oil pump outlet filter; 8. One-way valve 1; 9. Pressure relief valve; 10. Accumulator inlet manual valve; 11. Accumulator; 12. YC2 solenoid valve; 13. Cartridge valve; 14. One-way valve 2; 15. YC1 solenoid valve; 16. Hydraulic-controlled one-way valve; 17. Flow control valve. DETAILED DESCRIPTION

[0019] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0020] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific implementation methods and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] like Figure 1 As shown, the present application discloses a hydraulic control device for a hydraulic butterfly valve, comprising: a variable frequency motor 3, a coupling 4, an oil pump 5, and an accumulator 11. The variable frequency motor 3 is connected to the oil pump 5 through the coupling 4 to form a whole; the coupling 4 is used to transmit the rotational torque of the variable frequency motor 3 to the oil pump 5, and may also play a role in buffering and reducing mechanical vibration; an oil pump inlet filter 1 is installed at the inlet of the oil pump 5 to filter the liquid entering the oil pump and prevent impurities from entering the interior of the oil pump; an oil pump outlet relief valve 2 is installed at the outlet of the oil pump 5 to Control the system pressure to prevent the system from overloading; an oil pump outlet filter 7 is provided at the end of the outlet of the oil pump 5 away from the oil pump inlet filter 1, which is used to filter the liquid flowing out of the oil pump 5; a one-way valve 8 is provided at the output end of the oil pump outlet filter 7, and the one-way valve 8 is usually used to ensure that the liquid can only flow in one direction to prevent backflow; the accumulator 11 is connected to the one-way valve 8 through the accumulator inlet manual valve 10, and a pressure relief valve 9 is provided at the output end of the accumulator 11, which is used to release the pressure when the pressure is too high to protect the device from damage.

[0023] Preferably, a manual pump 6 is installed at one end of the oil pump inlet filter 1; the manual pump 6 is usually used independently to control the operation of the corresponding refueling equipment.

[0024] Preferably, the oil outlet of the oil pump outlet relief valve 2 may be connected to other downstream components, such as a hydraulic oil tank, or connected to the oil tank through a filter, depending on the specific configuration and requirements of the system.

[0025] Preferably, a cartridge valve 13 and a hydraulically controlled one-way valve 16 are connected to the main oil circuit corresponding to the oil pump 5 to control the flow direction of the liquid; a one-way valve 14 is provided at the output end of the cartridge valve 13 to ensure that the liquid can only flow in one direction.

[0026] Preferably, one end of the hydraulically controlled one-way valve 16 is also connected to a flow regulating valve 17 for regulating the liquid flow.

[0027] Preferably, a YC2 solenoid valve 12 and a YC1 solenoid valve 15 are provided on both sides of the cartridge valve 13 to control the flow direction or flow rate of the liquid.

[0028] When the hydraulic control device operates normally, each adjustable valve must be set. The pressure of pump A and pump B corresponding to the oil pump outlet relief valve 2 is set to 21±0.5MPa; the pressure relief valve 9 is normally closed, and the accumulator inlet manual valve 10 and cartridge valve 13 are normally open; the flow control valve 17 is generally set to an opening according to the on-site valve opening and closing speed.

[0029] During normal operation, any pump is started, the accumulator 11 is filled with liquid, and the electromagnets of the YC1 solenoid valve 15 and the YC2 solenoid valve 12 are energized to realize the opening and closing of the butterfly valve cylinder, as shown in Table 1. When the electromagnets YC1 and YC2 are de-energized, the cylinder retracts; when the solenoid valves YC1 and YC2 are energized, the cylinder extends; when the system pressure reaches 18MPa, the system pressure transmitter transmits a switch value to the remote location, and the currently running pump stops; when the system pressure is lower than 12MPa, the pump is started.

[0030] Table 1 Action logic table

[0031] Serial number YC1 YC2 Cylinder or system status 1 Get electricity Get electricity The cylinder piston rod extends and the butterfly valve opens 2 Get electricity Power failure System pressure relief 3 Power failure Get electricity Butterfly valve retaining position 4 Get electricity Power failure The cylinder piston rod retracts and the butterfly valve closes

[0032] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydraulic control device for a hydraulically controlled butterfly valve, characterized in that: include: A variable frequency motor (3), a coupling (4), an oil pump (5), and an accumulator (11). The variable frequency motor (3) is connected to the oil pump (5) via the coupling (4); the coupling (4) is used to transmit the rotational torque of the variable frequency motor (3) to the oil pump (5); an oil pump inlet filter (1) is installed at the inlet of the oil pump (5); an oil pump outlet overflow valve (2) is installed at the outlet of the oil pump (5); an oil pump outlet filter (7) is installed at one end of the outlet of the oil pump (5) away from the oil pump inlet filter (1); a check valve (8) is installed at the output end of the oil pump outlet filter (7); the accumulator (11) is connected to the check valve (8) via an accumulator inlet manual valve (10); and a pressure relief valve (9) is installed at the output end of the accumulator (11).

2. A hydraulic control device for a hydraulically controlled butterfly valve according to claim 1, characterized in that: A manual pump (6) is installed at one end of the oil pump inlet filter (1).

3. A hydraulic control device for a hydraulically controlled butterfly valve according to claim 1, characterized in that: The main oil circuit corresponding to the oil pump (5) is connected with a cartridge valve (13) and a hydraulically controlled one-way valve (16); a second one-way valve (14) is arranged at the output end of the cartridge valve (13).

4. A hydraulic control device for a hydraulically controlled butterfly valve as claimed in claim 3, characterized in that: One end of the hydraulically controlled one-way valve (16) is also connected to a flow regulating valve (17).

5. A hydraulic control device for a hydraulically controlled butterfly valve as claimed in claim 3, characterized in that: A YC2 solenoid valve (12) and a YC1 solenoid valve (15) are arranged on both sides of the cartridge valve (13).

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