Laser gas analyzer

Abstract

The utility model provides a laser gas analyzer and relates to the technical field of laser gas analysis. The laser gas analyzer comprises a transmitting unit, a receiving unit, two telescopic devices and a purging device. The emitting unit emits laser; the receiving unit receives the laser; the two telescopic devices are arranged on the transmitting unit and the receiving unit respectively, the telescopic devices are provided with passages penetrating through the telescopic devices, the length of the passages is adjusted along with the length adjustment of the telescopic devices, and one ends of the two passages are connected with the transmitting unit and the receiving unit respectively; the purging device is communicated with the channel so as to inject purging gas into the channel. The optical path can be calculated through the outer diameter of the pipeline and the length of the passage, so that the optical path used for calculation is consistent with the actual optical path, the measurement error is reduced, and the monitoring accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser gas analysis technical field, concretely relates to a laser gas analyzer. BACKGROUND

[0002] The in-situ laser gas analyzer is installed at both ends of the flue, can quickly monitor the gas concentration change of the process, and the test result is strong in representativeness, is the most commonly used gas monitoring equipment in the field of industrial process gas online monitoring.

[0003] At present, when the in-situ laser gas analyzer product is measured, the optical path generally adopts the inner diameter of the on-site flue pipeline, and the inner diameter of the pipeline is usually provided by the using unit, but in actual use, the thickness of the flue inner diameter is uneven, the flue opening is damaged, etc., resulting in deviation between the actual inner diameter and the design inner diameter, so that the optical path in calculation does not correspond to the actual optical path, and the monitoring result error is large.

[0004] And the laser gas analyzer has different installation sites and different installation positions, and the light path is of different lengths, and under long optical path, the light intensity is easily attenuated due to smoke dust shielding, thereby affecting the monitoring effect. UTILITY MODEL CONTENTS

[0005] In view of the problems existing in the prior art, the utility model provides a laser gas analyzer to improve the problems of large monitoring result error of the existing laser gas analyzer and light path attenuation caused by smoke dust shielding under long optical path.

[0006] To achieve the above object and other related objects, the utility model provides a laser gas analyzer, which comprises a transmitting unit, a receiving unit, two telescopic devices and a purging device. The transmitting unit transmits laser; the receiving unit receives the laser; the two telescopic devices are arranged at the transmitting unit and the receiving unit, respectively, and the telescopic device is provided with a passage penetrating through the telescopic device, and the length of the passage is adjusted with the length adjustment of the telescopic device, and one end of the two passages is connected with the transmitting unit and the receiving unit, respectively; the purging device is communicated with the passage to inject purging gas into the passage.

[0007] In an embodiment of the utility model, the laser gas analyzer comprises a connecting piece fixed with the telescopic device, and the connecting piece is configured to be connected with a pipeline to be detected.

[0008] In an embodiment of the utility model, the telescopic device comprises a plurality of sleeve pipes arranged in sequence, wherein one sleeve pipe is fixed with the transmitting unit or the receiving unit, a second sleeve pipe is arranged in the first sleeve pipe, and the adjacent sleeve pipes are connected in sliding mode.

[0009] In an embodiment of the utility model, adjacent the sleeve is fixed through locking piece.

[0010] In an embodiment of the utility model, the locking piece includes a jackscrew, the sleeve side wall is provided with a through screw hole, the jackscrew is threadedly connected with the through screw hole, wherein the side wall of the last sleeve is not provided with the through screw hole.

[0011] In an embodiment of the utility model, the sleeve inner wall is a tapered pipeline, the sleeve outer wall matched with the tapered pipeline is tapered, the small diameter of the tapered pipeline is greater than the small diameter of the sleeve matched with the tapered pipeline, and the small diameter of the tapered pipeline is less than the large diameter of the sleeve matched with the tapered pipeline.

[0012] In an embodiment of the utility model, the sleeve inner wall is provided with a limiting ring, the limiting ring is provided with a through hole, the diameter of the through hole is not less than the outer diameter of the adjacent sleeve sleeved in the sleeve, the outer wall of the adjacent sleeve sleeved in the sleeve is provided with a limiting block, and the diameter of the limiting block is greater than the diameter of the through hole.

[0013] In an embodiment of the utility model, the limiting block is an elastic limiting block, and the limiting block is in interference fit with the sleeve inner wall.

[0014] In an embodiment of the utility model, the sleeve outer wall is provided with an elastic piece, the elastic piece is in interference fit with the sleeve inner wall of the upper level, and the outer wall of the first sleeve is not provided with the elastic piece.

[0015] In an embodiment of the utility model, the sleeve outer wall is provided with a scale.

[0016] In combination with the prior art, the utility model has the beneficial effects that:

[0017] The existing laser gas analyzer usually uses the pipeline inner diameter provided by the use unit to calculate the optical path, but due to the uneven thickness of the pipeline inner diameter, the damage of the flue opening, and the like, there is a deviation between the actual inner diameter and the pipeline inner diameter provided by the use unit, thereby causing the calculated optical path to not correspond to the actual optical path, and causing a large error. The laser gas analyzer provided by the utility model includes two telescopic devices, the two telescopic devices are fixed opposite to the emitting unit and the receiving unit, the laser of the emitting unit enters another passage after passing through a passage, and then is received by the receiving unit. Since the passage is continuously filled with purge gas, the path in the passage can be ignored, and then the optical path can be calculated by the outer diameter of the pipeline and the length of the passage, so that the calculated optical path is consistent with the actual optical path, the measurement error is reduced, and the monitoring accuracy is improved.

[0018] When the pipe diameter is too large, the optical path can also be adjusted through the telescopic device, thereby improving the problem that long optical path is easily affected by flue gas cleanliness to cause light intensity attenuation and measurement inaccuracy, and improving the measurement accuracy when the pipe diameter is too large.

[0019] For different installation sites and installation positions, the length of the telescopic device is adjusted, so that the measurement optical path in different scenes is adjusted to the factory debugging optical path, which is convenient and simple to operate, improves the accuracy of the system optical path, and reduces the measurement error. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other embodiments can also be obtained from these drawings without creative labor.

[0021] Figure 1 It is an example schematic diagram of a laser gas analyzer of the present application.

[0022] Figure 2 It is an example schematic diagram of a telescopic device of the present application.

[0023] Figure 3 It is an example schematic diagram of an optical path of the present application.

[0024] Element number explanation:

[0025] 100, emitting unit; 200, receiving unit; 300, telescopic device; 310, sleeve; 320, locking piece; 400, connecting piece; 500, purging device; 510, purging pipe; 700, flue. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described below through specific concrete examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied through other different specific embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present application are for describing specific specific embodiments, and are not intended to limit the protection scope of the present application. The test methods not specified in the following embodiments are usually performed under conventional conditions or under conditions recommended by each manufacturer.

[0027] When the embodiments give a numerical range, it should be understood that, unless the utility model otherwise specifies, both ends of each numerical range and any one numerical between the two ends can be selected. Unless otherwise defined, all technical and scientific terms used in the utility model are used by the skilled in the art and the description of the utility model, and any method, equipment and material of the prior art similar or equivalent to the method, equipment and material in the embodiments of the utility model can also be used to realize the utility model.

[0028] It should be understood that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in the specification are only for the convenience of clear description, and are not used to limit the scope of the utility model, and the change or adjustment of the relative relationship is also regarded as the scope of the utility model without substantial change of the technical content.

[0029] Please refer to Figures 1 to 3 The utility model provides a kind of laser gas analyzer, including emitting unit 100, receiving unit 200, two telescopic devices 300 and purging device 500.Emitting unit 100 is used to emit laser, receiving unit 200 is used to receive the laser.Two telescopic devices 300 are separately arranged in the emitting unit 100 and the receiving unit 200, the passageway is provided on the telescopic device 300, and the length of the passageway is adjusted with the length of the telescopic device 300 adjustment, one end of two passageways is connected with the emitting unit 100 and the receiving unit 200 respectively, i.e.the end of one passageway is connected with emitting unit 100, and the end of another passageway is connected with receiving unit 200, and the laser of emitting unit 100 is received by receiving unit 200 in sequence via two passageways.Purging device 500 is communicated with the passageway, to inject purging gas into the passageway, and purging device 500 can provide stable purging gas and inject into the passageway, and purging gas is finally discharged into flue 700 via passageway, and purging gas ensures the cleanliness in passageway, which can play the effect of purging the end of emitting unit 100 and receiving unit 200 on the one hand, and can avoid that the gas in flue 700 enters into passageway to cause influence to measurement, to improve the accuracy of measurement result.In testing, the length of telescopic device 300 is adjusted according to the actual need of site, since telescopic device 300 passes through the pipe wall of flue 700 and enters into the inside of flue 700, actual optical path is the distance between two passageways, which can be directly calculated by the outer diameter of flue 700 and the length of telescopic device 300, for example Figure 3As shown in the figure, L1 is the length of the transmitting end, L2 is the length of the telescopic receiving end, R is the outer diameter of the flue 700, and the actual system optical path L=R-L1-L2. The utility model discloses through the adjustment of telescopic device 300, so that the optical path used for calculation is consistent with the actual optical path, reduces the measurement error, improves the accuracy of the measurement result;At the same time, according to actual needs, the field optical path can be adjusted to the factory calibration length, avoids the error caused by the optical path conversion, satisfies the use of different fields;For the scene that the diameter of the flue 700 is too large, by adjusting the length of telescopic device 300, the optical path can be shortened, and the problems of light intensity attenuation and inaccurate measurement caused by long optical path can be effectively avoided.

[0030] Please refer to Figure 1 and Figure 3 In an embodiment, the laser gas analyzer comprises a connecting piece 400 fixed with the telescopic device 300, and the connecting piece 400 is configured to be connected with the pipeline to be detected. The connecting piece 400 includes but is not limited to a connecting flange. The laser gas analyzer is fixed with the pipeline to be detected through the connecting piece 400, so as to facilitate the measurement of the flue gas in the pipeline to be detected. The connecting piece 400 can be fixed on the outer periphery of the telescopic device 300, or can be fixed on the end of the telescopic device 300 and fixed with the transmitting unit 100 or the receiving unit 200. Preferably, the connecting piece 400 is fixed on the outer periphery of the telescopic device 300, and the fixing mode can be welding, threaded connection and the like.

[0031] In an embodiment, the transmitting unit 100 comprises a laser module, a circuit board module and a lens, and other components of the transmitting unit 100 can refer to the existing transmitting unit 100, which will not be described herein.

[0032] In an embodiment, the purging device 500 comprises a purging gas generator and a purging gas pipe 510. The purging gas generator is communicated with the two telescopic devices 300 through the purging gas pipe 510, so as to purge the telescopic devices 300.

[0033] Please refer to Figure 1 and Figure 2In an embodiment, the telescopic device 300 comprises a plurality of sleeves 310 arranged in sequence, wherein one sleeve is fixed to the transmitting unit 100 or the receiving unit 200, and the second sleeve is arranged in the first sleeve. The telescopic device 300 can comprise two sleeves, three sleeves, four sleeves or more sleeves, and the sleeves 310 are sequentially named as the first sleeve, the second sleeve, and so on from the fixed end to the free end. For example, if the telescopic device 300 comprises three sleeves, they are respectively named as the first sleeve, the second sleeve, and the third sleeve. The first sleeve is arranged outside the second sleeve and is in sliding connection with the second sleeve, and the second sleeve is arranged outside the third sleeve and is in sliding connection with the third sleeve. The adjacent sleeves 310 are in sliding connection, which facilitates the length adjustment of the telescopic device 300.

[0034] In an embodiment, the sleeve 310 is a stainless steel sleeve 310, which improves the durability, corrosion resistance, and service life of the sleeve 310.

[0035] Please refer to Figure 2 In an embodiment, the adjacent sleeves 310 are fixed by the locking member 320. When the telescopic device 300 is adjusted to the appropriate position, the adjacent sleeves 310 can be locked by the locking member 320, so as to avoid the relative movement between the sleeves 310 during installation or measurement, which causes the length change of the telescopic device 300. In this way, the length of the telescopic device 300 can be kept as the preset length, and the accuracy of the measurement can be effectively improved.

[0036] In an embodiment, the locking member 320 comprises a jackscrew, and the side wall of the sleeve 310 is provided with a through-thread hole. The number of the through-thread holes corresponds to the number of the jackscrews. The jackscrew is in threaded connection with the through-thread hole, and the jackscrew is pressed against the wall of the next sleeve 310 in the sleeve 310, so as to fix the sleeve 310 and the next sleeve 310. When the length of the telescopic device 300 needs to be adjusted, the jackscrew is screwed outwards, and the jackscrew is separated from the wall of the next sleeve 310 in the sleeve 310, so that the sleeve 310 and the next sleeve 310 can slide relative to each other, thereby facilitating the adjustment of the telescopic device 300. The side wall of the last sleeve 310 is not provided with the through-thread hole, and the last sleeve 310 is not arranged with other sleeves 310 in the passage, so that the through-thread hole is not needed. In other embodiments, the through-thread hole can also be arranged on the last sleeve 310, so as to facilitate the expansion of the telescopic device 300 according to the actual needs. If necessary, the number of the sleeves 310 can be further increased.

[0037] The end of the jackscrew facing the outside of the sleeve 310 can be a T-slot, a cross-slot, an internal hexagonal slot, etc. A tool is matched with the slot to adjust the jackscrew. The end of the jackscrew facing the outside of the sleeve 310 can also be a knob extending out of the sleeve 310, so that the adjustment of the telescopic device 300 can be completed without the aid of other tools.

[0038] In an embodiment, the outer wall of the sleeve 310 is provided with an elastic member, which is in interference fit with the inner wall of the upper sleeve 310. This can increase the sealing between adjacent sleeves 310 and increase the sliding resistance between adjacent sleeves 310, thereby reducing the risk of relative movement between adjacent sleeves 310 during installation or measurement. The outer wall of the first sleeve 310 is not provided with the elastic member, which can reduce the cost.

[0039] In an embodiment, the inner wall of the sleeve 310 is provided with a limiting ring, and the limiting ring is provided with a through hole, and the diameter of the through hole is not less than the outer diameter of the adjacent sleeve 310 sleeved in the sleeve 310. The outer wall of the adjacent sleeve 310 sleeved in the sleeve 310 is provided with a limiting block, and the diameter of the limiting block is greater than the diameter of the through hole. The limiting block slides in the passage of the upper sleeve 310, and the cooperation of the limiting block and the limiting ring avoids the disengagement of the adjacent sleeves 310. When the limiting block and the limiting ring abut, the sealing between the adjacent sleeves 310 can be increased, thereby reducing the requirement for the flow of purge gas.

[0040] In an embodiment, the limiting block is an elastic limiting block, and the limiting block is in interference fit with the inner wall of the sleeve 310. The elastic limiting block is pressed against the inner wall of the sleeve 310, so as to effectively ensure the sealing between the adjacent sleeves 310, thereby reducing the requirement for the flow of purge gas.

[0041] In one embodiment, the inner wall of the sleeve 310 is a tapered tube, and the outer wall of the sleeve 310 that mates with the tapered tube is also tapered. The major diameter of the tapered tube is located at the end of the tapered tube near the fixed end, and the minor diameter is located at the end of the tapered tube near the free end. For example, when the telescopic device 300 is fixed to the launching unit 100, the end of the sleeve 310 near the launching unit 100 is the major diameter of the tapered tube, and the end of the sleeve 310 away from the launching unit 100 is the minor diameter of the tapered tube. The minor diameter of the tapered tube is larger than the minor diameter of the sleeve 310 that mates with the tapered tube, and the minor diameter of the tapered tube is smaller than the major diameter of the sleeve 310 that mates with the tapered tube. The major diameter of the tapered tube is larger than the major diameter of the sleeve 310 that mates with the tapered tube. The sleeve 310 slides inside the tapered pipe. Because the major diameter of the sleeve 310 is larger than the minor diameter of the tapered pipe to which the sleeve 310 is matched, the sleeve 310 can be prevented from detaching from the tapered pipe during the sliding process, and the adjacent sleeves 310 can be effectively limited.

[0042] In one embodiment, the outer wall of the sleeve 310 is provided with a scale, through which the length of the telescopic device 300 can be read directly. This facilitates the adjustment of the length of the telescopic device 300 and the quick determination of the optical path based on the outer diameter of the flue 700.

[0043] The laser gas analyzer disclosed in this application incorporates telescopic devices 300 at both the transmitting and receiving ends. These telescopic devices 300 are length-adjustable, allowing for precise control of the adjustable sleeve length to adjust the system's optical path. This enables on-site adjustment of the actual optical path based on varying optical paths, addressing issues such as light intensity attenuation and measurement inaccuracies over long optical paths. The system ensures that the measurement optical path in different scenarios is adjusted to the factory-calibrated path, significantly improving the accuracy of the system's optical path, reducing measurement errors, resolving customization issues, and saving labor costs. Therefore, this invention effectively overcomes some practical problems in the prior art, thus possessing high utilization value and practical significance.

[0044] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A laser gas analyzer characterized by, The utility model relates to a laser pipeline leak detection device, comprising: a transmitting unit for transmitting laser light; a receiving unit for receiving the laser light; two telescopic devices respectively arranged at the transmitting unit and the receiving unit, each of the telescopic devices being provided with a passageway therethrough, the length of the passageway being adjusted according to the length of the telescopic device, and one end of each of the two passageways being connected to the transmitting unit and the receiving unit respectively; a purging device in communication with the passageways for injecting a purging gas into the passageways.

2. The laser gas analyzer of claim 1, wherein, The utility model relates to a laser pipeline leak detection device, comprising: a connecting member fixed to the telescopic device, the connecting member being configured to be connected to a pipeline to be detected.

3. The laser gas analyzer of claim 1, wherein, The telescopic device comprises a plurality of telescopic sleeves arranged in sequence, one of the telescopic sleeves being fixed to the transmitting unit or the receiving unit, and the other telescopic sleeves being arranged in the one telescopic sleeve and being connected to each other in a sliding manner.

4. The laser gas analyzer of claim 3, wherein, The telescopic sleeves are fixed to each other by a locking member.

5. The laser gas analyzer of claim 4, wherein, The locking member comprises a jackscrew, the telescopic sleeves are provided with through screw holes in the side walls thereof, and the jackscrew is threadedly connected to the through screw holes; the side wall of the last telescopic sleeve is not provided with the through screw hole.

6. The laser gas analyzer of claim 3, wherein, The inner wall of the telescopic sleeve is a tapered pipeline, the outer wall of the telescopic sleeve is tapered, the small diameter of the tapered pipeline is greater than the small diameter of the telescopic sleeve matched with the tapered pipeline, and the small diameter of the tapered pipeline is less than the large diameter of the telescopic sleeve matched with the tapered pipeline.

7. The laser gas analyzer of claim 3, wherein, The inner wall of the telescopic sleeve is provided with a limiting ring, the limiting ring is provided with a through hole, the diameter of the through hole is not less than the outer diameter of the adjacent telescopic sleeve arranged in the telescopic sleeve, the outer wall of the adjacent telescopic sleeve arranged in the telescopic sleeve is provided with a limiting block, and the diameter of the limiting block is greater than the diameter of the through hole.

8. The laser gas analyzer of claim 7, wherein, The limiting block is an elastic limiting block, and the limiting block is in interference fit with the inner wall of the telescopic sleeve.

9. The laser gas analyzer of claim 3, wherein, The outer wall of the telescopic sleeve is provided with an elastic member, the elastic member is in interference fit with the inner wall of the telescopic sleeve of the upper level; the outer wall of the one telescopic sleeve is not provided with the elastic member.

10. The laser gas analyzer of claim 3, wherein, The outer wall of the telescopic sleeve is provided with a scale.

Images