CN204100960U - Air preheater fanning strip actuating mechanism displacement detector - Google Patents

Abstract

The utility model relates to a displacement detection device of an air preheater sector plate actuator, which relates to the technical field of linear displacement measurement. The utility model aims to solve the problems of large and abnormal measurement results caused by the existing linear displacement sensor due to the environment and the installation mode. In the displacement detection device of the air preheater fan-shaped plate actuator of the utility model, the pull rope displacement sensor is arranged in the control box, the vertical connecting rod and the control box are slidably connected, and the outlet end of the pull rope displacement sensor is connected to the vertical connecting rod through the connecting rod. , the vertical connecting rod is provided with an action block, and a limit switch is installed inside the control box. The distance between the action block and the two limit switches can be adjusted. , the outside of the control box is connected with a scale, and the crossbeam cooperates with the screw lift of the fan-shaped plate of the air preheater. The utility model is less affected by the environment and the installation mode, and has high measurement precision.

Description

Air preheater sector plate actuator displacement detection device

technical field

The utility model relates to a displacement detection device, in particular to a displacement detection device for an air preheater sector plate actuator, which belongs to the technical field of linear displacement measurement. the

Background technique

The displacement detection of the fan-shaped plate actuator of the air preheater adopts the traditional linear displacement sensor. The linear displacement sensor is used in many fields today, but due to factors such as the operating environment, on-site installation method, and sensor measurement stability, it often leads to measurement The result error is large or even the measurement result is abnormal. the

Contents of the invention

The utility model solves the problem that the existing linear displacement sensor has large error and abnormal measurement results due to the environment and installation method, and further provides an air preheater fan-shaped plate that is less affected by the environment and installation method and has high measurement accuracy. Mechanism displacement detection device.

The technical scheme that the utility model takes for solving the problems of the technologies described above is:

The displacement detection device of the air preheater fan-shaped plate actuator of the utility model includes a scale, a pointer, a beam, a vertical connecting rod, a limit switch, an action block, a pull rope displacement sensor, a connecting rod and a control box, and the pull rope displacement sensor is set. In the control box, the upper part of the vertical connecting rod is outside the control box, and the lower part of the vertical connecting rod is inside the control box. The vertical connecting rod and the control box are slidingly connected. The other end of the rod is fixedly connected with the vertical connecting rod. The lower part of the vertical connecting rod is provided with two upper and lower action blocks. There are also upper and lower limit switches installed inside the control box. The central axis of the limit switch is set parallel to the vertical connecting rod. One end of the action block is located between the two limit switches. The action block and the vertical link are detachably connected. The distance between the action block and the two limit switches can be adjusted. The top of the control box is vertically fixedly connected with a crossbeam, and the top outside of the control box is also fixedly connected with a scale. The scale is set in parallel with the vertical connecting rod. One end of the pointer is slidingly connected with the scale.

The air preheater fan-shaped plate actuator displacement detection device of the above scheme improves the traditional pull rod type linear displacement sensor into a pull rope type linear displacement sensor. The sensor is installed in the control box and measures the vertical displacement of the beam through the transmission of the connecting rod. That is, the movement displacement of the fan-shaped plate actuator. The detection device is less affected by the environment and the installation method, and the measurement accuracy is high.

Further design of the scheme: In order to improve the protection level, the protection level of the rope displacement sensor is IP65.

Further design of the scheme: In order to solve the problem of dust accumulation at the outlet, the outlet end of the pull rope displacement sensor is vertically downward.

Further design of the scheme: for the precise adjustment of the measurement data, the pointer and the vertical link are detachably connected.

The beneficial effects of the utility model are: the traditional rod-type linear displacement sensor of the actuator of the air preheater air leakage control system is improved into a rope-type linear displacement sensor, the sensor is installed in the control box, and the vertical position of the beam is measured through the connecting rod transmission. Displacement, that is, the action displacement of the sector plate actuator. The ambient temperature of this sensor can withstand up to 85°C. It is suitable for use in the working environment near the air preheater of the power plant. The measurement linearity accuracy can reach 0.05% FS, and the repeatability is 0.01%, which fully meets the measurement requirements of the control system.

Description of drawings

Fig. 1 is a structural representation of the utility model;

In the figure: 1-ruler, 2-pointer, 3-beam, 4-vertical connecting rod, 5-limit switch, 6-action block, 7-rope displacement sensor, 8-connecting rod, 9-control box.

Detailed ways

Specific embodiments: for illustration in conjunction with Fig. 1, the displacement detection device of the air preheater fan-shaped plate actuator of the present utility model includes a scale 1, a pointer 2, a beam 3, a vertical connecting rod 4, a limit switch 5, an action block 6, Stay rope displacement sensor 7, connecting rod 8 and control box 9, stay rope displacement sensor 7 is arranged in the control box 9, the top of vertical connecting rod 4 is outside control box 9, the bottom of vertical connecting rod 4 is inside control box, vertical The connecting rod 4 and the control box 9 are slidingly connected, one end of the connecting rod 8 is fixedly connected to the outlet end of the stay rope displacement sensor 7, the other end of the connecting rod 8 is fixedly connected to the vertical connecting rod 4, and the lower part of the vertical connecting rod 4 is provided with an upper and lower Two action blocks 6 and two upper and lower limit switches 5 are installed inside the control box 9, the central axis of the limit switch 5 is set parallel to the vertical connecting rod 4, and one end of the action block 6 is located between the two limit switches 5 , the action block 6 and the vertical link 4 are detachably connected, the distance between the action block 6 and the limit switch 5 can be adjusted, the upper part of the vertical link 4 is provided with a pointer 2, and the top of the upper part of the vertical link 4 is vertically fixedly connected with a beam 3. The top outside of the control box 9 is also fixedly connected with a scale 1. The scale 1 is set parallel to the vertical connecting rod 4. One end of the pointer 2 is slidingly connected with the scale 1. The crossbeam 3 cooperates with the screw lift of the fan-shaped plate of the air preheater. . When the crossbeam 3 moves in the vertical direction along with the action of the lead screw lift that drives the fan-shaped plate action, the length of the steel wire rope at the outlet end of the stay rope displacement sensor 7 will change accordingly, thereby measuring the action displacement value, passing through and stay rope The transmitter integrated with the displacement sensor 7 will output the current feedback of 4-20mA, and at the same time the displacement will be indicated on the scale of the scale 1 through the pointer 2; The position of the limit switch 5 is used to limit the range of linear displacement, and at the same time, it also limits the range of action for lifting and lowering the fan-shaped plate to ensure the safety and reliability of the system; the protection level of the pull rope displacement sensor 7 is IP65, and the wire outlet end of the pull rope is vertical. Downward, it can well prevent the problem of dust accumulation at the outlet. The overall electrical components of the linear displacement detection device are protected by the control box, which also has a good guarantee for the safety and life of the device. the

This embodiment is only an exemplary description of this patent, and does not limit its protection scope. Those skilled in the art can also make partial changes to it, as long as it does not exceed the spirit and essence of this patent, all within the protection scope of this patent. the

Claims (4)

1. The displacement detection device of the fan-shaped plate actuator of the air preheater, which is characterized in that it includes a scale (1), a pointer (2), a beam (3), a vertical connecting rod (4), a limit switch (5), and an action block (6), stay rope displacement sensor (7), connecting rod (8) and control box (9), stay rope displacement sensor (7) is arranged in the control box (9), the top of vertical connecting rod (4) controls Outside the box (9), the bottom of the vertical connecting rod (4) is inside the control box (9), the vertical connecting rod (4) and the control box (9) are slidingly connected, and one end of the connecting rod (8) and the stay cord displacement sensor ( 7) is fixedly connected to the outlet end, and the other end of the connecting rod (8) is fixedly connected to the vertical connecting rod (4). The lower part of the vertical connecting rod (4) is provided with two upper and lower action blocks (6), and the control box (9) Two upper and lower limit switches (5) are also installed inside, the central axis of the limit switch (5) is set parallel to the vertical connecting rod (4), and one end of the action block (6) is located between the two limit switches (5). Between, the action block (6) and the vertical link (4) are detachably connected, the distance between the action block (6) and the limit switch (5) can be adjusted, and the upper part of the vertical link (4) is provided with a pointer (2) , the top of the upper part of the vertical connecting rod (4) is vertically fixedly connected with a beam (3), and the top outside of the control box (9) is also fixedly connected with a scale (1), and the scale (1) is arranged parallel to the vertical connecting rod (4), One end of the pointer (2) is slidably connected to the scale (1), and the crossbeam (3) is motorized to cooperate with the screw lift of the sector plate of the air preheater. 2. The displacement detection device of the sector plate actuator of the air preheater according to claim 1, characterized in that the protection level of the pull cord displacement sensor (7) is IP65. 3. The displacement detection device of the sector plate actuator of the air preheater according to claim 2, characterized in that: the outlet end of the pull rope displacement sensor (7) is vertically downward. 4. The displacement detection device of the sector plate actuator of the air preheater according to claim 1, characterized in that the pointer (2) and the vertical connecting rod (4) are detachably connected.