Self-cleaning expansion monitoring device

Abstract

The utility model provides a self-cleaning expansion monitoring device, and relates to the technical field of expansion monitoring equipment, and the device comprises a laser which is fixedly connected with a measured part of to-be-measured equipment, and comprises an emitter used for emitting a light beam and a receiver used for receiving a reflected light beam; the displacement dial is fixed on one side of the to-be-tested equipment, the surface of the displacement dial is perpendicular to the light beams emitted by the emitter, and a plurality of sensors for sensing the light beams emitted by the emitter are arranged in the displacement dial; the purging device is arranged on the side of the displacement dial; and the controller is used for receiving data information sent by the laser and the displacement dial and controlling the blowing device to blow and clean the displacement dial regularly. The expansion monitoring device has the effect of improving the accuracy of the expansion monitoring device.

Description

Technical Field

[0001] The present application relates to the technical field of expansion monitoring equipment, and in particular to a self-cleaning expansion monitoring device. Background Art

[0002] The expansion monitoring device for thermal power plants is used to monitor the expansion of equipment such as steam drums, boilers, and pipelines during ignition and operation. It can timely detect equipment deformation caused by improper pressure increase or poor installation and maintenance control, and reduce the possibility of cracks or leaks in the equipment due to uneven expansion. Its working principle is to determine the expansion amount based on the precise measurement of the displacement of the monitoring point caused by the expansion of the equipment due to heat.

[0003] In the related art, the expansion monitoring device in laser positioning mode is a relatively accurate expansion monitoring device, which includes a laser, a displacement dial and a controller. The laser is fixedly connected to the device under test, and the displacement dial is set perpendicular to the light beam emitted by the laser. When the device expands due to heat, the laser is displaced, and the expansion amount of the device can be accurately and real-time determined through the displacement dial.

[0004] With respect to the above-mentioned related technologies, since the displacement dial is fixedly set, a certain amount of dust will accumulate on its surface over time, resulting in reduced measurement accuracy. Utility Model Content

[0005] In order to improve the problem of reduced measurement accuracy of an expansion monitoring device, the present application provides a self-cleaning expansion monitoring device.

[0006] The present application provides a self-cleaning expansion monitoring device that adopts the following technical solution:

[0007] A self-cleaning expansion monitoring device, comprising:

[0008] A laser, fixedly connected to the tested part of the device under test, comprises a transmitter for transmitting a light beam and a receiver for receiving a reflected light beam;

[0009] A displacement scale plate, fixed to one side of the device to be tested, with its surface perpendicular to the light beam emitted by the emitter, and having a plurality of sensors inside for sensing the light beam emitted by the emitter;

[0010] a purge device, disposed on the side of the displacement scale plate; and

[0011] The controller is used to receive the data information sent by the laser and the displacement scale, and control the purge device to blow and purge the displacement scale regularly.

[0012] Furthermore, the purge device includes a purge component, an air supply component and a control component. The purge component includes a purge bracket, an air box and a plurality of air nozzles. The air box is fixed to one side of the displacement dial through the purge bracket. The plurality of air nozzles are arranged on the air box at intervals and are all connected to the air box. The air nozzles are inclined toward the surface of the displacement dial. The control component is used to control the air supply component to supply air to the air box.

[0013] Furthermore, the purge components are provided in two groups, and are respectively arranged on both sides of the displacement dial.

[0014] Furthermore, the gas supply assembly includes a gas supply main pipe, a first branch pipe, a second branch pipe and a three-way joint. The gas supply main pipe, the first branch pipe and the second branch pipe are connected by the three-way joint. The end of the gas supply main pipe away from the three-way joint is connected to the gas source, and the ends of the first branch pipe and the second branch pipe away from the three-way joint are respectively connected to two gas boxes.

[0015] Furthermore, the control component includes a first solenoid valve and a second solenoid valve, the first solenoid valve is arranged on the first branch pipe, the second solenoid valve is arranged on the second branch pipe, and the first solenoid valve and the second solenoid valve are both electrically connected to the controller.

[0016] Furthermore, the first solenoid valve and the second solenoid valve are opened at intervals.

[0017] Furthermore, a support frame is provided at the bottom of the displacement dial, and the displacement dial and the purge bracket are both arranged on the support frame.

[0018] Furthermore, a waist-shaped hole is provided on the support frame, and the purge bracket can be adjustably arranged on the support frame through the waist-shaped hole.

[0019] Furthermore, a support rod is provided between the laser and the device under test, the support rod is fixedly connected to the tested part of the device under test, and the laser is fixed to one end of the support rod away from the device under test.

[0020] Furthermore, an oblique support rod is provided below the support rod, one end of the oblique support rod is connected to the device to be tested, and the other end of the oblique support rod is connected to the support rod.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. By selecting a higher-precision laser in conjunction with the displacement scale monitoring method, the monitoring data is made more accurate. By setting up a purge device, the surface of the displacement scale is regularly cleaned by blowing air to reduce the possibility of dust accumulation on the surface of the displacement scale, further improving the accuracy of the expansion monitoring device data;

[0023] 2. By arranging two sets of purge components on both sides of the displacement dial, the comprehensiveness of the purge device on the displacement dial can be greatly improved, thereby effectively improving the purge effect and reducing the impact of dust on measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0026] Figure 2 It is a front view of an embodiment of the present application.

[0027] Figure 3 It is a schematic diagram of the structure of the purge device of an embodiment of the present application.

[0028] Figure numerals: 1. Equipment to be tested; 2. Laser; 3. Displacement dial; 4. Purge device; 41. Purge assembly; 411. Purge bracket; 412. Air box; 413. Air nozzle; 42. Air supply assembly; 421. Air supply main pipe; 422. First branch pipe; 423. Second branch pipe; 424. Three-way connector; 43. Control assembly; 431. First solenoid valve; 432. Second solenoid valve; 5. Support rod; 51. Diagonal support rod; 6. Support bracket; 61. Waist-shaped hole. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0030] The present application embodiment discloses a self-cleaning expansion monitoring device. Figure 1The self-cleaning expansion monitoring device comprises a laser 2, a displacement dial 3, a purge device 4 and a controller. The laser 2 is fixedly connected to the measured part of the device to be tested 1. In this embodiment, the device to be tested 1 is a boiler. The laser 2 is fixedly connected to the side wall of the device to be tested 1. The laser 2 comprises a transmitter for emitting a light beam and a receiver for receiving a reflected light beam. The displacement dial 3 is fixed to one side of the device to be tested 1. A plurality of sensors are arranged on the displacement dial 3. The sensors are light sensors. The plurality of sensors are evenly distributed on the surface of the displacement dial 3 at equal intervals. The more sensors there are, the higher the accuracy of the displacement dial 3. The purge device 4 is arranged on the side of the displacement dial 3 and is used to The surface of the displacement dial 3 is regularly cleaned by blowing air; the controller (not shown in the figure) is used to receive the data information sent by the laser 2 and the displacement dial 3, and control the purge device 4 to regularly clean the displacement dial 3 by blowing air. In this embodiment, the controller and the laser 2, the displacement dial 3 and the purge device 4 all transmit electrical signals through a wireless connection. As an alternative embodiment, the controller and the laser 2, the displacement dial 3 and the purge device 4 can also transmit data information through a wired connection. The staff can remotely observe the expansion of the device under test through the display of the controller, and can set the purge interval time of the purge device 4 through the controller.

[0031] When the device under test expands due to heat, the laser 2 is displaced, and part of the light beam emitted by the transmitter is received by the sensor on the displacement scale 3. The displacement scale 3 determines the displacement of the laser 2 along the first direction and the second direction. The first direction and the second direction are perpendicular to each other and parallel to the surface of the displacement scale 3. The part of the light beam emitted by the transmitter will be reflected to the receiver through the surface of the displacement scale 3. The processor calculates the displacement of the laser 2 along the third direction according to the time from the transmitter emitting the light beam to the receiver receiving the light beam. The third direction is perpendicular to the first direction and the second direction, so as to realize the positioning of the laser 2 along the mutually perpendicular first direction, the second direction and the third direction, and determine the spatial coordinates of the laser 2, so as to accurately determine the displacement of the laser 2 to obtain the expansion of the measured part of the device under test 1. In this embodiment, the first direction and the second direction are along the horizontal direction, and the third direction is along the vertical direction. As an alternative embodiment, the third direction can be along the horizontal direction, one of the first direction and the second direction is along the vertical direction, and the other is along the horizontal direction. That is, in this embodiment, the light beam of the transmitter is emitted vertically downward, and the displacement scale 3 is located directly below the transmitter.

[0032] Reference Figure 2 and Figure 3The purge device 4 includes a purge component 41, an air supply component 42 and a control component 43, wherein the purge component 41 includes a purge bracket 411, an air box 412 and a plurality of air nozzles 413, the purge bracket 411 includes a vertically arranged rod portion and a horizontally arranged plate portion, the air box 412 is welded and fixed to the top of the rod portion, and the air box 412 is a strip-shaped box body with a hollow interior; the plurality of air nozzles 413 are located on one side of the air box 412 close to the displacement dial 3, and are arranged at equal intervals along the length direction of the air box 412. In this embodiment, three air nozzles 413 are provided on the air box 412, and the air nozzles 413 are arranged from top to bottom toward the displacement dial 3, so that the blowing range of the plurality of air nozzles 413 can cover the displacement dial 3, and the control component 43 is used to control the air supply component 42 to supply air to the air box 412 regularly.

[0033] Since the airflow blown out by the air nozzle 413 will gradually weaken from one end of the displacement dial 3 to the other end, the purging intensity at the end away from the air nozzle 413 will be greatly reduced. In order to improve the cleaning intensity of the purging device 4, two groups of purging components 41 are provided in this embodiment, and the two groups of purging components 41 are symmetrically arranged on both sides of the displacement dial 3.

[0034] The air supply assembly 42 includes an air supply main pipe 421, a first branch pipe 422, a second branch pipe 423 and a three-way joint 424. The air supply main pipe 421, the first branch pipe 422, the second branch pipe 423 and the three-way joint 424 are all soft air pipes. The air supply main pipe 421, the first branch pipe 422, the second branch pipe 423 are respectively connected to the three interfaces of the three-way joint 424, and the end of the air supply main pipe 421 away from the three-way joint 424 is connected to an air source, which is an air compressor. The ends of the first branch pipe 422 and the second branch pipe 423 away from the three-way joint 424 are respectively connected to two air boxes 412.

[0035] The control component 43 includes a first solenoid valve 431 and a second solenoid valve 432. The first solenoid valve 431 and the second solenoid valve 432 are both solenoid valves equipped with wireless communication functions. The first solenoid valve 431 and the second solenoid valve 432 transmit signals to the controller via wireless connection.

[0036] In specific use, the staff sets the start-up interval of the first solenoid valve 431 and the second solenoid valve 432 on the controller. When the start-up time is reached, the first solenoid valve 431 or the second solenoid valve 432 is opened, and the high-pressure air in the air compressor flows through the air supply main pipe 421 to the first branch pipe 422 or the second branch pipe 423, and enters the air box 412. The air in the air box 412 is ejected outward by multiple air nozzles 413, and the multiple air nozzles 413 purge different areas of the displacement dial 3, thereby achieving the cleaning of the displacement dial 3. In this embodiment, the start-up interval of the first solenoid valve 431 and the second solenoid valve 432 is twelve hours. In actual use, the interval time can be adjusted according to the amount of dust in the working environment, thereby reducing the energy consumption of continuous purging.

[0037] Since the two groups of purge components 41 are arranged relative to each other, when the first solenoid valve 431 and the second solenoid valve 432 are started at the same time, the flow of airflow will be affected. Therefore, the first solenoid valve 431 and the second solenoid valve 432 need to be opened at intervals. In this embodiment, the first solenoid valve 431 is opened for five seconds before the second solenoid valve 432 is opened, and the opening time of the first solenoid valve 431 and the second solenoid valve 432 are both set to three seconds, so that the two groups of purge components 41 can purge the two sides of the displacement dial 3 in turn.

[0038] In order to facilitate the installation and transfer of the expansion monitoring device, a support bracket 6 is provided at the bottom of the displacement scale plate 3. The support bracket 6 is an I-shaped steel. The displacement scale plate 3 is fixed to the middle of the support bracket 6 by bolts, and two purge brackets 411 are respectively fixed to the two ends of the support bracket 6 by bolts. Specifically, the support bracket 6 is provided with waist-shaped holes 61 on both sides of the displacement scale plate 3, and two waist-shaped holes 61 are provided on each side. The length direction of the waist-shaped holes 61 is parallel to the length direction of the support bracket 6. The plate portion of the purge bracket 411 is provided with through holes for the bolts to pass through. The purge bracket 411 is fixed to the support bracket 6 by bolts passing through the waist-shaped holes 61 and matching nuts. By providing the waist-shaped holes 61, the position of the purge bracket 411 can be adjusted, so that the air nozzle 413 is adjusted to a position with higher purge efficiency, thereby improving the purge efficiency.

[0039] Since the device under test 1 is usually a high-temperature device, in order to reduce the adverse effects of high temperature on the laser 2, a support rod 5 is arranged between the laser 2 and the device under test 1, one end of the support rod 5 is welded and fixed to the side wall of the device under test 1, and the laser 2 is fixedly connected to the other end of the support rod 5 by bolts. In order to reduce the possibility of deformation of the support rod 5, an oblique support rod 51 is arranged below the support rod 5, one end of the oblique support rod 51 is welded to the device under test 1, and the other end is connected to the middle part of the bottom of the support rod 5, thereby reducing the possibility of bending and deformation of the support rod 5, and further improving the measurement accuracy of the expansion monitor.

[0040] The implementation principle of a self-cleaning expansion monitoring device in an embodiment of the present application is: the controller receives data information from the laser 2 and the displacement dial 3, accurately determines the expansion amount of the device to be tested 1, and controls the purge device 4 to regularly blow and clean the displacement dial 3, thereby reducing the possibility of accumulation of impurities such as dust on the surface of the displacement dial 3, thereby improving the measurement accuracy of the expansion monitoring device.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-cleaning expansion monitoring device, characterized in that: include: A laser, fixedly connected to the tested part of the device under test, comprises a transmitter for transmitting a light beam and a receiver for receiving a reflected light beam; A displacement scale plate, fixed to one side of the device to be tested, with its surface perpendicular to the light beam emitted by the emitter, and having a plurality of sensors inside for sensing the light beam emitted by the emitter; A purge device, arranged on the side of the displacement scale plate; as well as The controller is used to receive the data information sent by the laser and the displacement scale, and control the purge device to blow and purge the displacement scale regularly.

2. A self-cleaning expansion monitoring device according to claim 1, characterized in that: The purge device includes a purge component, an air supply component and a control component. The purge component includes a purge bracket, an air box and a plurality of air nozzles. The air box is fixed to one side of a displacement dial through the purge bracket. The plurality of air nozzles are arranged on the air box at intervals and are all connected to the air box. The air nozzles are inclined toward the surface of the displacement dial. The control component is used to control the air supply component to supply air to the air box.

3. A self-cleaning expansion monitoring device according to claim 2, characterized in that: The purge components are provided in two groups and are respectively arranged on both sides of the displacement scale plate.

4. A self-cleaning expansion monitoring device according to claim 3, characterized in that: The gas supply assembly includes a gas supply main pipe, a first branch pipe, a second branch pipe and a three-way joint. The gas supply main pipe, the first branch pipe and the second branch pipe are connected by the three-way joint. The end of the gas supply main pipe away from the three-way joint is connected to the gas source, and the ends of the first branch pipe and the second branch pipe away from the three-way joint are respectively connected to two gas boxes.

5. A self-cleaning expansion monitoring device according to claim 4, characterized in that: The control component includes a first solenoid valve and a second solenoid valve, wherein the first solenoid valve is arranged on a first branch pipe, and the second solenoid valve is arranged on a second branch pipe, and both the first solenoid valve and the second solenoid valve are electrically connected to a controller.

6. A self-cleaning expansion monitoring device according to claim 5, characterized in that: The first solenoid valve and the second solenoid valve are opened at intervals.

7. A self-cleaning expansion monitoring device according to any one of claims 2 to 6, characterized in that: A support frame is provided at the bottom of the displacement scale plate, and the displacement scale plate and the purge bracket are both arranged on the support frame.

8. A self-cleaning expansion monitoring device according to claim 7, characterized in that: The support frame is provided with a waist-shaped hole, and the purge bracket is adjustably arranged on the support frame through the waist-shaped hole.

9. A self-cleaning expansion monitoring device according to claim 1, characterized in that: A support rod is arranged between the laser and the device to be tested. The support rod is fixedly connected to the tested part of the device to be tested. The laser is fixed to one end of the support rod away from the device to be tested.

10. A self-cleaning expansion monitoring device according to claim 9, characterized in that: An oblique support rod is provided below the support rod, one end of the oblique support rod is connected to the device to be tested, and the other end of the oblique support rod is connected to the support rod.

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