Hydraulic control one-way valve hydraulic servo-motor

Abstract

The utility model discloses a hydraulic control one-way valve hydraulic servo-motor which comprises an oil cylinder, an integrated block, a filter, a stop valve, an OPC one-way valve, an unloading valve and a servo valve, the oil cylinder is arranged on a base, the integrated block is arranged at the upper end of the oil cylinder, the stop valve is arranged on the integrated block, the filter is arranged on one side of the integrated block, and the integrated block is connected with an oil return one-way valve. A pressure oil pipe and an OPC oil pipe are further arranged on the integrated block, the OPC oil pipe is connected with an OPC one-way valve, the OPC one-way valve is connected with an unloading valve, and the unloading valve is connected with an oil cylinder; the utility model has the beneficial effects that the hydraulic control one-way valve is arranged in the integrated block, under the condition of pressure relief of OPC oil or AST oil, a main oil way can be completely disconnected, the pressure relief of the OPC oil or AST oil is avoided, and the service life of the main oil way is prolonged. In addition, the hydraulic control device of the hydraulic servo-motor is compact in structure and easy and convenient to install and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to a hydraulically controlled one-way valve oil motor. Background Art

[0002] At present, when the AST oil (main steam valve oil motor) or OPC oil (control valve oil motor) in the EH control system of steam turbine power generation is depressurized and the oil motor needs to quickly close the main steam valve or control valve, there is a problem in the main oil circuit. Due to the operation failure of the solenoid valve, servo valve and throttling device, the main system hydraulic oil is consumed too much, resulting in the main system pressure oil loss, causing the entire steam turbine control system to malfunction. The principle diagram is as follows Figure 1 shown.

[0003] This type of oil motor with a hydraulically controlled one-way valve is designed to solve the problem that when the oil motor in the turbine control system is depressurized by AST oil (main steam valve oil motor) or OPC oil (regulating valve oil motor), and the oil motor needs to quickly close the main steam valve or regulating valve, the main system hydraulic oil is consumed excessively due to malfunction of the solenoid valve, servo valve and throttling device in the main oil circuit, causing the main system pressure oil to lose pressure, resulting in malfunction of the entire turbine control system. Utility Model Content

[0004] The purpose of the present utility model is to provide a hydraulically controlled one-way valve oil motor to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a hydraulically controlled one-way valve oil motor, comprising a cylinder, an integrated block, a filter, a stop valve, an OPC one-way valve, an unloading valve and a servo valve, wherein the cylinder is arranged on a base, the integrated block is arranged at the upper end of the cylinder, the stop valve is arranged on the integrated block, the filter is arranged on one side of the integrated block, the integrated block is connected to an oil return one-way valve, the integrated block is further provided with a pressure oil pipe and an OPC oil pipe, the OPC oil pipe is connected to the OPC one-way valve, the OPC one-way valve is connected to the unloading valve, and the unloading valve is connected to the cylinder;

[0006] It also includes a hydraulically controlled one-way valve, one end of which is connected to the filter, and the other end of which is respectively connected to the unloading valve and the servo valve.

[0007] Preferably, the oil cylinder is provided with a first pressure measuring point and a second pressure measuring point.

[0008] Preferably, a third pressure measuring point is provided between the OPC one-way valve and the unloading valve, and the hydraulically controlled one-way valve is connected to the third pressure measuring point.

[0009] Preferably, a mounting bracket is provided on one side of the base.

[0010] Preferably, a junction box is provided on the integrated block.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention sets a hydraulically controlled one-way valve in the integrated block and places it in front of the servo valve or solenoid valve on the pressure oil circuit. When the OPC oil or AST oil is depressurized, the main oil circuit can be completely disconnected, thereby preventing the main system hydraulic oil from being affected by the operation failure of the oil motor. In addition, the present invention has a compact structure and is simple and convenient to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the oil motor in the prior art;

[0013] Figure 2 This is a schematic diagram of the structure of the utility model;

[0014] Figure 3 This is the principle diagram of the utility model.

[0015] In the figure: 1. Cylinder; 101. First pressure measuring point; 102. Second pressure measuring point; 103. Third pressure measuring point; 104. Mounting bracket; 2. Manifold block; 3. Filter; 4. Stop valve; 5. OPC check valve; 6. Unloading valve; 7. Servo valve; 8. Base; 9. Return oil check valve; 10. Pressure oil pipe; 11. OPC oil pipe; 12. Hydraulic control check valve; 13. Junction box. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figures 2 to 3 The utility model provides a technical solution: a hydraulically controlled one-way valve oil motor, comprising a cylinder 1, an integrated block 2, a filter 3, a stop valve 4, an OPC one-way valve 5, an unloading valve 6 and a servo valve 7. The cylinder 1 is arranged on a base 8, the integrated block 2 is arranged at the upper end of the cylinder 1, the stop valve 4 is arranged on the integrated block 2, the filter 3 is arranged on one side of the integrated block 2, the integrated block 2 is connected to a return oil one-way valve 9, and a pressure oil pipe 10 and an OPC oil pipe 11 are also provided on the integrated block 2. The OPC oil pipe 11 is connected to the OPC one-way valve 5, the OPC one-way valve 5 is connected to the unloading valve 6, and the unloading valve 6 is connected to the cylinder 1.

[0018] In one embodiment of the present utility, a hydraulically controlled one-way valve 12 is further included. One end of the hydraulically controlled one-way valve 12 is connected to the filter 3 , and the other end of the hydraulically controlled one-way valve 12 is connected to the unloading valve 6 and the servo valve 7 , respectively.

[0019] In a specific embodiment of the present invention, the hydraulically controlled one-way valve 12 is installed in front of the servo valve 7 (or solenoid valve) of the oil motor pressure oil circuit. When the oil motor is working normally, the AST oil circuit (main steam valve oil motor) or the OPC oil circuit (throttle oil motor) establishes oil pressure, and the control port of the hydraulically controlled one-way valve 12 is connected to the AST oil (main steam valve oil motor) or the OPC oil (throttle oil motor). Under the action of the oil pressure of the AST oil circuit or the OPC oil circuit, the valve core of the hydraulically controlled one-way valve 12 is pushed to open, so that the hydraulically controlled one-way valve 12 Valve 12 is in the normally open state, and the system pressure oil can pass through the stop valve 4, filter 3, and hydraulically controlled one-way valve 12 to the servo valve 7, pushing the oil cylinder to work and opening or closing the turbine valve. When the AST oil (main steam valve oil motor) or OPC oil (throttle oil motor) is depressurized, the control port of the hydraulically controlled one-way valve 12 loses pressure, and the valve core of the hydraulically controlled one-way valve 12 is quickly reset and closed under the action of the spring of the hydraulically controlled one-way valve 12, disconnecting the main oil circuit to prevent the main system hydraulic oil from being affected by the operation failure of the oil motor.

[0020] In an embodiment of the present utility, the oil cylinder 1 is provided with a first pressure measuring point 101 and a second pressure measuring point 102 .

[0021] In one embodiment of this practicality, a third pressure measuring point 103 is provided between the OPC one-way valve 5 and the unloading valve 6 , and the hydraulically controlled one-way valve 12 is connected to the third pressure measuring point 103 .

[0022] In one embodiment of the present utility, a mounting bracket 104 is provided on one side of the base 1 .

[0023] In an embodiment of the present utility, a junction box 13 is provided on the integrated block 2 .

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulically controlled one-way valve oil motor, characterized by: It includes an oil cylinder, an integrated block, a filter, a stop valve, an OPC one-way valve, an unloading valve and a servo valve. The oil cylinder is arranged on a base, the integrated block is arranged on the upper end of the oil cylinder, the stop valve is arranged on the integrated block, the filter is arranged on one side of the integrated block, the integrated block is connected to the oil return one-way valve, the integrated block is also provided with a pressure oil pipe and an OPC oil pipe, the OPC oil pipe is connected to the OPC one-way valve, the OPC one-way valve is connected to the unloading valve, and the unloading valve is connected to the oil cylinder; It also includes a hydraulically controlled one-way valve, one end of which is connected to the filter, and the other end of which is respectively connected to the unloading valve and the servo valve.

2. The hydraulically controlled one-way valve oil motor according to claim 1, characterized in that: The oil cylinder is provided with a first pressure measuring point and a second pressure measuring point.

3. The hydraulically controlled one-way valve oil motor according to claim 2, characterized in that: A third pressure measuring point is provided between the OPC one-way valve and the unloading valve, and the hydraulically controlled one-way valve is connected to the third pressure measuring point.

4. The hydraulically controlled one-way valve oil motor according to claim 3, characterized in that: A mounting bracket is provided on one side of the base.

5. The hydraulically controlled one-way valve oil motor according to claim 4, characterized in that: A junction box is provided on the integrated block.

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