Quick-closing valve feedback method

Abstract

The invention discloses a quick-closing valve feedback method. A steam extraction quick-closing valve is used for adjusting the steam extraction amount, an angular displacement sensor is usually installed on the steam extraction quick-closing valve for controlling the valve opening of a switch valve, but the angular displacement sensor calculates displacement through angle conversion, so that the measurement precision and reliability are not high. The method comprises the following steps that a hydraulic servo-motor shell is fixed to an external displacement sensor through a displacement sensor base, a feedback rod and a displacement sensor guide rod are inserted into circular holes of a connecting rod respectively and fixed, and the feedback rod and the displacement sensor guide rod are jointly linked; when the switch valve is operated, the guide rod moves so as to drive the guide rod of the displacement sensor to move together with the feedback rod; the linear displacement of the valve can be directly measured through the external displacement sensor, and compared with an angular displacement sensor for calculating displacement through angle conversion, the external displacement sensor has higher measurement precision and reliability. The method is used for fast-closing valve feedback.

Description

Technical Field

[0001] The invention relates to a quick-closing valve feedback method. Background Art

[0002] The extraction steam quick closing valve is used to adjust the extraction steam volume. An angular displacement sensor is usually installed on the switch valve to control the valve opening. However, since the angular displacement sensor calculates the displacement through angle conversion, the measurement accuracy and reliability are not high. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned technical problems and provide a quick-closing valve feedback method.

[0004] The above purpose is achieved through the following technical solutions: A quick closing valve feedback method, the method comprising the following steps: (1) The external displacement sensor is fixed to the hydraulic motor housing through the displacement sensor base, and the feedback rod and the displacement sensor guide rod are respectively inserted into the circular hole of the connecting rod and fixed so that the feedback rod and the displacement sensor guide rod move together; (2) When the switch valve is operated, the guide rod moves, thereby driving the displacement sensor guide rod and the feedback rod to move together; (3) The external displacement sensor can directly measure the linear displacement of the valve. Compared with the angular displacement sensor that calculates the displacement through angle conversion, it has higher measurement accuracy and reliability.

[0005] The quick-closing valve feedback method comprises: the oil motor housing is fixed with an external displacement sensor via a displacement sensor base, a guide block is fixed on the guide rod, a displacement sensor guide rod is fixed on the guide block, and the feedback rod of the external displacement sensor is connected to the displacement sensor guide rod via a connecting device.

[0006] In the quick-closing valve feedback method, the connecting device is a connecting rod. Beneficial Effects

[0007] 1. The present invention installs an external displacement sensor, which can directly measure the linear displacement of the valve. Compared with the angular displacement sensor that calculates the displacement through angle conversion, it has higher measurement accuracy and reliability.

[0008] 2. Under certain working conditions, the angular displacement sensor may not be able to measure accurately due to installation position restrictions or mechanical structure influences. The linear displacement sensor is not subject to these restrictions and can reflect the actual position of the valve more directly and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1It is a structural schematic diagram of the present invention; Figure 2 is a schematic diagram of the structure of the connecting device; In the figure: 1. Guide rod; 2. External displacement sensor; 3. Displacement sensor base; 4. Displacement sensor guide rod; 5. Connecting device; 6. Guide block; 7. Oil motor housing; 8. Oil motor piston rod; 9. Feedback rod. DETAILED DESCRIPTION

[0010] Reference Figure 1 , a quick closing valve feedback method, the method comprising the following steps: (1) The external displacement sensor is fixed to the hydraulic motor housing through the displacement sensor base, and the feedback rod and the displacement sensor guide rod are respectively inserted into the circular hole of the connecting rod and fixed so that the feedback rod and the displacement sensor guide rod move together; (2) When the switch valve is operated, the guide rod moves, thereby driving the displacement sensor guide rod and the feedback rod to move together; (3) The external displacement sensor can directly measure the linear displacement of the valve. Compared with the angular displacement sensor that calculates the displacement through angle conversion, it has higher measurement accuracy and reliability.

[0011] A quick-closing valve feedback method comprises: an oil motor housing 7, an oil motor piston rod 8 and a guide rod 1, wherein the oil motor housing is fixed to an external displacement sensor 2 via a displacement sensor base 3, a guide block 6 is fixed to the guide rod, a displacement sensor guide rod 4 is fixed to the guide block, and the feedback rod of the external displacement sensor is connected to the displacement sensor guide rod via a connecting device 5.

[0012] In the quick-closing valve feedback method, the connecting device is a connecting rod, and the feedback rod and the displacement sensor guide rod are respectively inserted into the circular hole of the connecting rod and fixed, so that the feedback rod and the displacement sensor guide rod are linked together. Therefore, when the switch valve is operated, the guide rod moves, thereby driving the displacement sensor guide rod to move together with the feedback rod, so that the linear displacement of the valve can be directly measured by the external displacement sensor. Compared with the angular displacement sensor that calculates the displacement through angle conversion, it has higher measurement accuracy and reliability.

Claims

1. A quick closing valve feedback method, characterized by: The method comprises the following steps: (1) The external displacement sensor is fixed to the hydraulic motor housing through the displacement sensor base, and the feedback rod and the displacement sensor guide rod are respectively inserted into the circular hole of the connecting rod and fixed so that the feedback rod and the displacement sensor guide rod move together; (2) When the switch valve is operated, the guide rod moves, thereby driving the displacement sensor guide rod and the feedback rod to move together; (3) The external displacement sensor can directly measure the linear displacement of the valve. Compared with the angular displacement sensor that calculates the displacement through angle conversion, it has higher measurement accuracy and reliability.

2. A quick closing valve feedback method according to claim 1, comprising: Its characteristics are: The oil motor housing is fixed to the external displacement sensor through a displacement sensor base, a guide block is fixed to the guide rod, a displacement sensor guide rod is fixed to the guide block, and the feedback rod of the external displacement sensor is connected to the displacement sensor guide rod through a connecting device.

3. A quick closing valve feedback method according to claim 2, characterized in that: The connecting device is a connecting rod.

Images