Monitoring device for observing steam drum liquid levels at two different positions by adopting single camera

Abstract

The utility model discloses a monitoring device adopting a single camera to observe steam drum liquid levels at two different positions. The camera observes two steam drum double-color liquid level meters at the two different positions at the same time. The totally-enclosed metal housing is provided with two connection observation ports which are respectively aligned with the two steam drum double-color liquid level meters, and images of the two steam drum double-color liquid level meters are respectively emitted to one comprehensive reflection mirror through two turning reflection mirrors which reflect light rays and are refracted again; the images of the two steam drum double-color liquid level meters are arranged in parallel on the comprehensive reflecting mirror; the number of the camera is one, and the image collecting range of the camera is the images of the two steam drum double-color liquid level meters in the comprehensive reflecting mirror. By adopting the technical scheme, two liquid levels of the steam drum can be synchronously compared and observed, and the real conditions of the liquid levels are compared and analyzed; a common plane mirror is changed into the plane mirror with the LED lamp, a light source in the camera obscura is supplemented, the influence of external lamplight on image collection of the camera is avoided, and liquid level display is not influenced by weather conditions any more.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of boiler production liquid level control. More specifically, the utility model relates to a monitoring device for observing two different positions of the liquid level of a steam drum using a single camera. BACKGROUND

[0002] In the prior art, a steam drum liquid level camera is used to collect images of the steam drum liquid level so as to observe and control the steam drum liquid level in the central control room of the production system. However, the above technical solution has the following problems and defects:

[0003] 1. Two cameras are usually needed to observe two liquid levels of a steam drum, and the central control room of the production control system cannot compare the two liquid levels in the same screen, and it is difficult to intuitively determine which liquid level is distorted.

[0004] 2. The steam drum liquid level camera is greatly affected by light conditions, especially the outdoor steam drum liquid level. When the light intensity is extremely high or extremely weak, or in bad weather, the camera cannot observe and see the liquid level.

[0005] Using the keywords "steam drum, liquid level, camera, monitoring (or detection)", etc., the existing public technical documents are searched, and the following search results are obtained:

[0006] 1. Chinese patent document: "Steam drum liquid level measuring device", patent (application) number: 201910323468.7; the technical solution recorded therein is:

[0007] "The steam drum liquid level measuring device comprises a dual-color water level meter measuring device, a camera, a frequency divider, and a video signal processing device. The dual-color water level meter measuring device is connected to the steam drum of the boiler for measuring the liquid level of the steam drum of the boiler and displaying the liquid level of the steam drum through the built-in scale. The camera is used to collect the video images displayed by the scale, and the video signals are processed by the frequency divider. One way is output to the water level monitor for direct display, and the other way is output to the video signal processing device for analysis and processing. Based on the red and green color ratio and the total measurement range, the current steam drum liquid level is obtained";

[0008] The technical effects recorded therein are:

[0009] The above technical solution "has a 4-20mA output function, can be directly used for monitoring, protection and control of the system, and has few investment restrictions, low failure rate, small maintenance amount, and can be widely applied to steam drum liquid level measurement of various system types".

[0010] 2. Chinese patent document: "Steam drum dual-color liquid level meter light shielding monitoring device for boiler", patent (application) number: 202022236146.X; the technical solution recorded therein is:

[0011] The "boiler drum bicolor level gauge shading monitoring device" is fixed on the boiler platform by an adjustable mounting bracket. The boiler drum bicolor level gauge shading monitoring device includes: a shading observation box, which is a rectangular cross-section box with a circumferentially closed structure. One end of the shading observation box is provided with an open connection port for the boiler drum bicolor level gauge, and the other end is provided with a valve structure. An image acquisition camera is placed inside the valve structure. A background light source is also installed inside the shading observation box.

[0012] The technical effects described are:

[0013] "It can reduce the impact of ambient light, improve the accuracy of on-site operators' observation of the liquid level, and prevent misoperation."

[0014] However, the technical solutions described in the aforementioned technical documents, as well as the existing publicly available technical solutions, have not been able to solve the problems and defects in the existing technology, such as "liquid level images cannot be compared on the same screen" and "being greatly affected by lighting conditions". Utility Model Content

[0015] This invention provides a monitoring device that uses a single camera to observe the liquid level in two different locations of the steam drum, with the aim of simultaneously observing and monitoring the liquid level in different locations of the steam drum.

[0016] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0017] This utility model discloses a monitoring device for observing the liquid level of two steam drums at two different locations using a single camera. The device includes a camera that simultaneously observes two bicolor level gauges at different locations on the steam drum. The device is equipped with a fully enclosed metal casing with two observation ports on the casing, each aligned with one of the two bicolor level gauges. Each port is further refracted by two reflective mirrors, projecting the images of the two level gauges onto a single composite mirror, so that their images are side-by-side on the composite mirror. The camera is a single unit, and its image acquisition range includes the images of the two level gauges within the composite mirror.

[0018] The camera is connected to the control unit in the control room of the production system via a signal circuit.

[0019] The two observation ports on the fully enclosed metal casing are respectively sealed and connected to the two steam drum bicolor level gauges, and the two steam drum bicolor level gauges are covered and fixed inside the fully enclosed metal casing.

[0020] The fully enclosed metal casing is made of thin steel plate with a thickness of 1.5 to 2.0 mm.

[0021] The turning mirror is a plane mirror with LED light, and the size of width*height is 400*800mm.

[0022] The comprehensive mirror is a plane mirror with LED light, and the size of width*height is 1000*800mm.

[0023] The camera is a color high-definition integrated digital network camera.

[0024] The specification model of the camera is iDS-2ZCN2507N type, and the technical parameters are as follows: 25 times optical zoom; focal length 4.8-120mm, resolution 1920*1080.

[0025] The turning angle of the turning mirror is 45°, so that the image light path is turned by 90°.

[0026] The device for simultaneously observing two liquid levels of steam drums by using a single camera in all-weather light environment is adopted, and two liquid levels of steam drums can be synchronously and contrastively observed under the premise of saving a camera, the real situation of the liquid level is contrastively analyzed, the ordinary plane mirror is changed into a plane mirror with LED light, the light source in the dark box is supplemented, the influence of external light on the camera for collecting images is avoided, the liquid level display will not be affected by weather conditions, and the liquid level can be clearly observed throughout the year; the camera and the dual-color liquid level meter are protected from the influence of bad weather and the like, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0027] The contents shown in the drawings and the marks in the drawings are briefly described as follows:

[0028] Figure 1 It is a plane schematic view of the structure of the utility model;

[0029] Figure 2 It is a three-dimensional schematic view of the structure of the utility model;

[0030] Figure 3 It is an image screen shot for simultaneously observing two liquid levels of the utility model.

[0031] The marks in the drawings are as follows:

[0032] 1, steam drum dual-color liquid level meter, 2, steam drum dual-color liquid level meter, 3, comprehensive mirror (plane mirror with LED light), 4, turning mirror, 5, turning mirror, 6, turning mirror, 7, turning mirror, 8, camera, 9, fully-closed metal shell, 10, connecting observation port. DETAILED DESCRIPTION

[0033] The specific embodiments of the present application are further described in detail below with reference to the drawings, and the descriptions of the embodiments are used to help the skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical scheme of the present application.

[0034] As Figure 1 , Figure 2 indicated, the structure of the present application is a monitoring device for observing two different position steam drum liquid levels under all-weather light environment by using a single camera; the monitoring device comprises a camera 8 for observing and monitoring the steam drum liquid level.

[0035] In order to solve the problems existing in the prior art and overcome its defects, and realize the purpose of observing and monitoring the steam drum liquid level at different positions at the same time, the technical scheme adopted by the present application is:

[0036] As Figure 1 , Figure 2 indicated, in the monitoring device of the present application, the camera 8 simultaneously observes two different position steam drum dual-color liquid level gauges 1 and 2; under the premise of saving a camera, the two liquid levels of the steam drum can be synchronously compared and observed, and the real situation of the liquid level can be compared and analyzed.

[0037] The device is provided with a fully-closed metal cover 9, two connecting observation ports 10 are arranged on the fully-closed metal cover 9 and are respectively aligned with the two steam drum dual-color liquid level gauges 1 and 2, and each passes through two reflection mirrors for turning and reflecting light, and the images of the two steam drum dual-color liquid level gauges 1 and 2 are respectively refracted to a comprehensive reflecting mirror 3, so that the images of the two steam drum dual-color liquid level gauges 1 and 2 are juxtaposed together on the comprehensive reflecting mirror 3; the effect is as shown in Figure 3 .

[0038] The camera 8 is one, and the image acquisition range is the images of the two steam drum dual-color liquid level gauges 1 and 2 in the comprehensive reflecting mirror 3.

[0039] Through the reflection of the reflecting mirror, the two images are concentrated on one screen, and only one camera can conveniently observe and compare the two liquid level gauges at the same time.

[0040] The connecting observation port 10, i.e. the flange port for connection, is designed as a rectangular flange port and is determined according to the size of the dual-color liquid level gauge. The fully-closed metal cover 9 is a completely closed cavity, and the two connecting observation ports 10 on the fully-closed metal cover 9 are sealed and connected with the steam drum dual-color liquid level gauges 1 and 2, so that the dual-color liquid level gauges are covered in the fully-closed metal cover 9.

[0041] The device for simultaneously observing two drum liquid levels in all-weather illumination environment saves one camera, and can synchronously and comparably observe two drum liquid levels, compares and analyzes the real liquid level situation, and makes the liquid level control in the production process more convenient, faster and reliable.

[0042] The camera 8 is connected with the control unit of the production system control room through a signal circuit.

[0043] The control unit obtains the liquid level signals of the drum dual-color liquid level gauges through a signal circuit, and controls the production process according to the liquid level signals.

[0044] The two connecting observation openings 10 on the fully-closed metal cover shell 9 are respectively sealed and connected with the two drum dual-color liquid level gauges 1 and 2, and the two drum dual-color liquid level gauges 1 and 2 are covered and fixed in the fully-closed metal cover shell 9.

[0045] Through the protection of the fully-closed metal cover shell 9, the liquid level display will not be affected by weather conditions, and can be clearly observed under any weather condition, so that the continuous and normal production is ensured.

[0046] The camera 8 is a color high-definition integrated digital network camera.

[0047] The liquid level parameters of the two drum dual-color liquid level gauges are obtained by the color high-definition integrated digital network camera.

[0048] The following are specific requirements and technical parameters of the utility model:

[0049] The shell material of the fully-closed metal cover shell 9 is made of 1.5-2.0 mm thick thin steel plate through cutting, bending and welding.

[0050] The turning mirror is a plane mirror with LED lamp, and the width x height size is 400x800 mm.

[0051] The specification and model of the camera 8 are iDS-2ZCN2507N, and the technical parameters are as follows: 25 times optical zoom, focal length 4.8-120 mm, and resolution 1920x1080.

[0052] The turning angle of the turning mirror is 45°, so that the image light path turning angle is 90°.

[0053] The utility model discloses a plane mirror is changed to the reflector with LED lamp, supplements the light source in the dark box, avoids the influence of external light to the camera, liquid level display will no longer be influenced by weather condition, can clearly observe all the year round, protects the camera and bicolour liquid level meter from the influence of bad weather and the environment, prolongs the life.

[0054] The utility model has been described exemplarily above in connection with the drawings, and obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as various non-essential improvements using the method concept and technical scheme of the utility model or directly applying the concept and technical scheme of the utility model to other occasions without improvement are all within the protection scope of the utility model.

Claims

1. A monitoring device for observing the liquid level in two different locations of a steam drum using a single camera, comprising a camera (8), characterized in that: The camera (8) simultaneously observes two different positions of the drum double-color liquid level meter (1, 2); the device is provided with a fully-closed metal cover (9), the fully-closed metal cover (9) is provided with two connecting observation openings (10) respectively aligned with the two drum double-color liquid level meters (1, 2), and each passes through two reflected light turning mirrors to respectively refract the images of the two drum double-color liquid level meters (1, 2) to a comprehensive mirror (3), so that the images of the two drum double-color liquid level meters (1, 2) are juxtaposed together on the comprehensive mirror (3); the camera (8) is one, and the image acquisition range is the images of the two drum double-color liquid level meters (1, 2) in the comprehensive mirror (3).

2. The monitoring device for observing the liquid level of the steam drum in two different positions with a single camera according to claim 1, characterized in that: The camera (8) is connected with the control unit of the production system control room through a signal circuit.

3. The monitoring device for observing the liquid level of the steam drum at two different positions using a single camera according to claim 1, wherein: The two connecting observation openings (10) on the fully-closed metal cover (9) are respectively sealed and connected with the two drum double-color liquid level meters (1, 2), so that the two drum double-color liquid level meters (1, 2) are covered in the fully-closed metal cover (9) and fixed.

4. The monitoring device for observing the liquid level of the steam drum at two different positions using a single camera according to claim 1, wherein: The shell material of the fully-closed metal cover (9) is made of a 1.5-2.0 mm thick thin steel plate.

5. The monitoring device for observing the liquid level of the steam drum at two different locations using a single camera as claimed in claim 1, wherein: The turning mirror is a plane mirror with an LED lamp, and the width x height size is 400 x 800 mm.

6. The monitoring device for observing the liquid level of the steam drum at two different locations using a single camera as claimed in claim 1, wherein: The comprehensive mirror (3) is a plane mirror with an LED lamp, and the width x height size is 1000 x 800 mm.

7. The monitoring device for observing the liquid level of the steam drum at two different locations using a single camera as claimed in claim 1, wherein: The camera (8) is a color high-definition integrated digital network camera.

8. The monitoring device for observing the liquid level of the steam drum at two different positions by using a single camera according to claim 7, wherein: The specification and model of the camera (8) is iDS-2ZCN2507N type; the technical parameters are: 25 times optical zoom; focal length 4.8-120 mm, resolution 1920 x 1080.

9. The monitoring device for observing the liquid level of the steam drum at two different locations using a single camera as claimed in claim 7, wherein: The turning angle of the turning mirror is 45°, so that the image light path turning is 90°.

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