Calibrating device for laser methane remote measuring instrument

Abstract

A calibration device for a laser methane remote measuring instrument belongs to the technical field of calibration of laser methane remote measuring instruments and comprises at least two supporting blocks, two guide rails are mounted among the upper surfaces of the multiple supporting blocks, distance marks are arranged on the upper surface of the guide rail at the front end, and multiple sliding blocks are slidably mounted on the outer surfaces of the guide rails. A carrying table is installed between the upper surfaces of the multiple sliding blocks on the left side, a limiting mechanism used for fixing a laser methane remote measuring instrument is installed on the upper surface of the carrying table, a precise fine adjustment rotating platform body is fixedly installed between the upper surfaces of the multiple sliding blocks in the middle, and a gas storage part is installed on the upper surface of the precise fine adjustment rotating platform body in a threaded connection mode. An infrared analyzer interface, an air inlet and an air outlet are formed in the outer surface of the air storage part, a fixed table is fixedly installed between the upper surfaces of the multiple sliding blocks on the right side, and a diffuse reflection plate is detachably installed in the fixed table. The correction effect is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser methane telemetry calibration, and particularly relates to a laser methane telemetry calibration device. Background Art

[0002] Methane gas is a common flammable and explosive gas in the petrochemical industry. The laser methane telemetry is a new alarm device for methane gas leakage at the production site. Through the principle of laser telemetry, it can monitor a large range and wide angle at the production site. Once methane gas leakage is detected, it will immediately give an audible and visual alarm. However, the laser methane telemetry needs to be calibrated after production.

[0003] After retrieval, in the related field, the authorized patent with the publication number of "CN217981246U" and the patent name of "A Calibration Device for Laser Gas Telemetry" drives the laser gas telemetry to move horizontally for monitoring through a moving platform. However, there are the following defects in the monitoring process: the distance between the moving platform and the gas storage cavity cannot be accurately adjusted, and there is a lack of a supplementary lighting structure, which is difficult to ensure the uniformity of laser reflection, resulting in deviation of detection data and adverse effects on the calibration effect. In view of this, a laser methane telemetry calibration device is provided to solve the above technical problems. Content of the Utility Model

[0004] Aiming at the problem that the calibration data of the existing laser gas telemetry calibration device is prone to deviation, the utility model provides a laser methane telemetry calibration device. Distance marks are set on the front-end guide rail, and the stage carrying the laser methane telemetry, the precision fine-tuning rotary platform body carrying the gas storage member, and the fixed stage carrying the diffuse reflection plate are respectively stably installed on the upper surfaces of the corresponding sliding tables. Thereby, the distances between the laser methane telemetry and the gas storage member and between the laser methane telemetry and the diffuse reflection plate can be accurately adjusted according to the distance marks, and the supplementary lighting can be implemented by means of the diffuse reflection plate to ensure the uniformity of laser reflection, thereby reducing detection deviation and ensuring the calibration effect, and effectively solving the problem that the calibration data of the existing laser gas telemetry calibration device is prone to deviation. The specific technical solution is as follows:

[0005] A calibration device for a laser methane telemetry instrument, comprising at least two support blocks. Between the upper surfaces of multiple said support blocks, two guide rails are fixedly installed. A distance mark is provided on the upper surface of the front-end guide rail. A plurality of sliders are slidably installed on the outer surfaces of the guide rails. Between the upper surfaces of the multiple left-side sliders, a carrier platform is fixedly installed. On the upper surface of the carrier platform, a limiting mechanism for fixing the laser methane telemetry instrument is installed. Between the upper surfaces of the multiple middle sliders, a precision fine-tuning rotary platform main body is fixedly installed. On the upper surface of the precision fine-tuning rotary platform main body, a gas storage member is screwed and installed. On the outer surface of the gas storage member, an infrared analyzer interface, an air inlet, and an air outlet are provided. Between the upper surfaces of the multiple right-side sliders, a fixed platform is fixedly installed. Inside the fixed platform, a diffuse reflection plate is detachably installed.

[0006] In the above technical solution, the scale starting point of the distance mark is set in the middle of the front-end guide rail. From the scale starting point of the distance mark, towards the left and right sides of the front-end guide rail respectively, the scale values increase in sequence.

[0007] In the above technical solution, fixing blocks are symmetrically and fixedly installed at the rear end of the upper surface of the carrier platform, and a locking hole is formed at the front end of the upper surface of the carrier platform.

[0008] The limiting mechanism includes a "π"-shaped plate. The rear end of the "π"-shaped plate is rotatably installed between the two fixing blocks through a rotating shaft, and a locking bolt is screwed through the upper surface of the front end of the "π"-shaped plate and is screwed into the locking hole.

[0009] In the above technical solution, two limiting ribs are fixedly installed on the upper surface of the carrier platform.

[0010] In the above technical solution, a rubber pad is fixedly installed on the lower surface of the "π"-shaped plate.

[0011] In the above technical solution, a clamping groove is provided on the upper surface of the fixed platform. The diffuse reflection plate is installed in the clamping groove. Two tightening bolts are screwed through the left surface of the fixed platform and are tightened against the left surface of the diffuse reflection plate.

[0012] The calibration device for a laser methane telemetry instrument of the present utility model, compared with the prior art, has the beneficial effects as follows:

[0013] In the present utility model, distance markings are set on the front guide rail, and the platform carrying the laser methane telemeter, the precision fine-tuning rotary platform main body carrying the gas storage member, and the fixed platform carrying the diffuse reflection plate are respectively stably installed on the upper surface of the corresponding sliding table. Thereby, the distances between the laser methane telemeter and the gas storage member and between the laser methane telemeter and the diffuse reflection plate can be accurately adjusted according to the distance markings, and supplementary lighting can be implemented by means of the diffuse reflection plate to ensure the uniformity of laser reflection, thereby reducing detection deviation, ensuring the calibration effect, and effectively solving the problem that the calibration data of the laser gas telemeter calibration device in the prior art is prone to deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. is a front view structural schematic diagram of the present utility model.

[0015] Figure 2 FIG. is a top view structural schematic diagram of the present utility model.

[0016] Figure 3 FIG. is a structural schematic diagram of the platform of the present utility model.

[0017] Figure 4 FIG. is a structural schematic diagram of the fixed platform of the present utility model.

[0018] Figures 1-4 In, wherein: 1, support block; 11, guide rail; 111, distance marking; 12, slider; 2, platform; 21, fixing block; 22, limiting rib; 23, locking hole; 3, limiting mechanism; 31, "π"-shaped plate; 311, rubber pad; 32, locking bolt; 4, precision fine-tuning rotary platform main body; 5, gas storage member; 51, infrared analyzer interface; 52, air inlet; 53, exhaust port; 6, fixed platform; 61, clamping groove; 62, tightening bolt; 7, diffuse reflection plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] The front, back, left, right, up and down in this embodiment are described with Figure 1 as the reference plane. Please refer to Figures 1-4 , the present utility model provides a technical solution:

[0021] A calibration device for a laser methane telemeter, comprising at least two support blocks 1. Between the upper surfaces of multiple support blocks 1, two guide rails 11 are fixedly installed. On the upper surface of the front guide rail 11, a distance mark 111 is provided. On the outer surfaces of the guide rails 11, multiple sliders 12 are slidably installed. Between the upper surfaces of multiple left sliders 12, a stage 2 is fixedly installed. On the upper surface of the stage 2, a limiting mechanism 3 for fixing the laser methane telemeter is installed. Between the upper surfaces of multiple middle sliders 12, a precision fine-tuning rotary platform main body 4 is fixedly installed. On the upper surface of the precision fine-tuning rotary platform main body 4, a gas storage member 5 is screwed and installed. On the outer surface of the gas storage member 5, an infrared analyzer interface 51, an air inlet 52 and an air outlet 53 are provided. Between the upper surfaces of multiple right sliders 12, a fixed platform 6 is fixedly installed. Inside the fixed platform 6, a diffuse reflection plate 7 is detachably installed;

[0022] During use, as shown in Figure 1 the figure, the laser methane telemeter to be calibrated is clamped and fixed on the stage 2 by using the limiting mechanism 3. An external infrared gas concentration detector is installed at the infrared analyzer interface 51. Methane delivery pipes are respectively connected to the air inlet 52 and the air outlet 53 through external flow meters, so that methane can be smoothly supplied into the gas storage member 5. After that, when calibrating the laser methane telemeter, it is necessary to ensure that there is gas discharged from the flow meter at the air outlet 53 of the gas storage member 5 to make the gas flow. Adjust the precision fine-tuning rotary platform main body 4 to tilt the gas storage member 5 by 15°, and refer to the distance mark 111 to keep the distance between the gas storage member 5 and the laser methane telemeter at 50 cm. Adjust the diffuse reflection plate 7 to an appropriate position. Measure the methane gas concentration in the gas storage member 5 through the external infrared gas concentration detector. When the deviation between the maximum value and the minimum value of the indication value of the external infrared gas concentration detector within one minute is not greater than 2%, it is determined that the indication value of the external infrared gas concentration detector is stable. At this time, the laser methane telemeter can be calibrated and adjusted. During the whole adjustment process, while ensuring the distance standard, the uniformity of laser reflection is also ensured, thereby reducing the detection deviation and guaranteeing the calibration effect.

[0023] In addition, when adjusting the distance between the laser methane telemeter and the diffuse reflection plate 7 and the gas storage member 5 with reference to the distance mark 111, for the convenience of quick adjustment, the scale starting point of the distance mark 111 is set in the middle of the front guide rail 11. From the scale starting point of the distance mark 111 towards the left and right sides of the front guide rail 11 respectively, the scale values increase in sequence. This setting method of the scale starting point can significantly improve the adjustment efficiency and accuracy in actual operation. When the gas storage member 5 is accurately located at the scale starting point, the operator can more intuitively and quickly determine the appropriate positions corresponding to the laser methane telemeter and the diffuse reflection plate 7, reducing the errors and time costs during the adjustment process.

[0024] In the above technical solution, fixing blocks 21 are symmetrically and fixedly installed at the rear end of the upper surface of the stage 2, and locking holes 23 are formed at the front end of the upper surface of the stage 2;

[0025] Specifically, as shown in Figure 1 and Figure 3 , the limiting mechanism 3 includes a "π"-shaped plate 31. The rear end of the "π"-shaped plate 31 is rotatably installed between the two fixing blocks 21 through a rotating shaft, and a locking bolt 32 is screwed through the upper surface of the front end of the "π"-shaped plate 31 and screwed into the locking hole 23;

[0026] When using the limiting mechanism 3 to fix the laser methane telemetry instrument, it is necessary to first place the laser methane telemetry instrument on the upper surface of the stage 2. After that, flip the "π"-shaped plate 31 to press and clamp the laser methane telemetry instrument, and then screw the locking bolt 32 into the locking hole 23 to fix the position of the "π"-shaped plate 31.

[0027] Considering that before clamping and fixing the laser methane telemetry instrument, it is necessary to align its position with the gas storage member 5. As shown in Figure 3 , two limiting ribs 22 are fixedly installed on the upper surface of the stage 2. Placing the laser methane telemetry instrument between the two limiting ribs 22 can ensure that the laser methane telemetry instrument is quickly aligned with the gas storage member 5.

[0028] In the actual calibration process, the design of such limiting ribs 22 can effectively improve the speed and accuracy of position calibration, reduce the calibration error caused by position deviation, and ensure the efficient progress of the entire calibration process.

[0029] Considering that when clamping and fixing the laser methane telemetry instrument, the "π"-shaped plate 31 may cause clamping damage to it. As shown in Figure 3 , a rubber pad 311 is fixedly installed on the lower surface of the "π"-shaped plate 31, and the rubber pad 311 can be used to replace the contact with the "π"-shaped plate 31, thereby reducing the damage caused by clamping.

[0030] Finally, as shown in Figure 1 and Figure 4 , a clamping groove 61 is provided on the upper surface of the fixing table 6, the diffuse reflection plate 7 is installed in the clamping groove 61, and two tightening bolts 62 are screwed through the left surface of the fixing table 6 and tighten against the left surface of the diffuse reflection plate 7. After loosening the tightening bolts 62, the diffuse reflection plate 7 can be removed from the clamping groove 61.

Claims

1. A laser methane telemeter calibration device, characterized in that: The invention comprises at least two support blocks (1), two guide rails (11) are fixedly installed between the upper surfaces of the plurality of support blocks (1), the upper surface of the front guide rail (11) is provided with a distance mark (111), the outer surface of the guide rail (11) is slidably installed with a plurality of sliders (12), a carrier (2) is fixedly installed between the upper surfaces of the plurality of sliders (12) on the left side, a limit mechanism (3) for fixing a laser methane telemeter is installed on the upper surface of the carrier (2), a precision fine-tuning rotating platform body (4) is fixedly installed between the upper surfaces of the plurality of sliders (12) in the middle, an air storage component (5) is screwedly installed on the upper surface of the precision fine-tuning rotating platform body (4), an infrared analyzer interface (51), an air inlet (52) and an exhaust port (53) are provided on the outer surface of the air storage component (5), a fixed platform (6) is fixedly installed between the upper surfaces of the plurality of sliders (12) on the right side, and a diffuse reflection plate (7) is detachably installed in the fixed platform (6).

2. A laser methane telemeter calibration device according to claim 1, characterized in that: The scale starting point of the distance mark (111) is arranged in the middle of the front guide rail (11), and the scale values ​​increase successively from the scale starting point of the distance mark (111) towards the left and right sides of the front guide rail (11).

3. A laser methane telemeter calibration device according to claim 1, characterized in that: A fixing block (21) is symmetrically fixedly mounted at the rear end of the upper surface of the carrier (2), and a locking hole (23) is provided at the front end of the upper surface of the carrier (2); The limiting mechanism (3) comprises a "π"-shaped plate (31), the rear end of the "π"-shaped plate (31) being rotatably mounted between the two fixed blocks (21) via a rotating shaft, and a locking bolt (32) being threadedly mounted through the upper surface of the front end of the "π"-shaped plate (31), and the locking bolt (32) being threadedly mounted in the locking hole (23).

4. A laser methane telemeter calibration device according to claim 3, characterized in that: Two limiting ribs (22) are fixedly mounted on the upper surface of the carrier (2).

5. A laser methane telemeter calibration device according to claim 3, characterized in that: A rubber pad (311) is fixedly mounted on the lower surface of the "π"-shaped plate (31).

6. A laser methane telemeter calibration device according to claim 1, characterized in that: The upper surface of the fixing platform (6) is provided with a clamping groove (61), the diffuse reflection plate (7) is installed in the clamping groove (61), and two tightening bolts (62) are screwed through the left surface of the fixing platform (6), and the tightening bolts (62) are tightened against the left surface of the diffuse reflection plate (7).

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