CN209261650U - Diesel engine exhaust pipe with filtering and purifying function - Google Patents
Diesel engine exhaust pipe with filtering and purifying function Download PDFInfo
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- CN209261650U CN209261650U CN201821900584.8U CN201821900584U CN209261650U CN 209261650 U CN209261650 U CN 209261650U CN 201821900584 U CN201821900584 U CN 201821900584U CN 209261650 U CN209261650 U CN 209261650U
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- 238000001914 filtration Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 124
- 238000000746 purification Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 3
- 239000003651 drinking water Substances 0.000 claims 2
- 235000020188 drinking water Nutrition 0.000 claims 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000003595 mist Substances 0.000 abstract description 9
- 238000005086 pumping Methods 0.000 abstract description 6
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000013618 particulate matter Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
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- 230000009467 reduction Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 206010010904 Convulsion Diseases 0.000 description 1
- 206010014561 Emphysema Diseases 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
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Abstract
本实用新型公开了一种具有过滤净化功能的柴油发动机尾气排放管，包括排气管壳体，所述排气管壳体的表面开设有入气孔，所述入气孔的内壁固定连接有入气管道，所述排气管壳体的表面开设有出气孔，所述出气孔的内壁固定连接有出气管。该一种具有过滤净化功能的柴油发动机尾气排放管，通过设置旋流塔层和透气孔，使排放的尾气喝水融合净化使可以更有效的反应净化，通过设置第一水管和第二水管，使水运输至排气管壳体的内腔进行配合净化，通过设置主循环水管和抽水循环泵，使水可以一直循环的运作，通过设置排气管壳体和雾气过滤板，使最后净化的气体通过排气管壳体和雾气过滤板过滤掉多余的杂质和垃圾。
The utility model discloses a diesel engine tail gas discharge pipe with the function of filtering and purifying, which comprises an exhaust pipe shell, the surface of the exhaust pipe shell is provided with an air inlet hole, and the inner wall of the air inlet hole is fixedly connected with an air inlet pipe. The surface of the exhaust pipe shell is provided with an air outlet hole, and the inner wall of the air outlet hole is fixedly connected with an air outlet pipe. This kind of diesel engine tail gas discharge pipe with filtering and purification function, by setting the swirl tower layer and air holes, the exhaust gas and water can be fused and purified so that the reaction and purification can be more effective. By setting the first water pipe and the second water pipe, The water is transported to the inner cavity of the exhaust pipe shell for purification. By setting the main circulation water pipe and the pumping circulation pump, the water can be continuously circulated. By setting the exhaust pipe shell and the mist filter plate, the final purified The gas passes through the exhaust pipe housing and the mist filter plate to filter out excess impurities and garbage.
Description
技术领域technical field
本实用新型涉及柴油机配件技术领域，具体为一种具有过滤净化功能的柴油发动机尾气排放管。The utility model relates to the technical field of diesel engine accessories, in particular to a diesel engine tail gas discharge pipe with the function of filtering and purifying.
背景技术Background technique
大型柴油机主要排放物为PM(颗粒状物质)和NOx，而CO和HC排放较低。控制柴油机尾气排放主要是控制颗粒物质PM和NO生成，降低PM和NOx的直接排放。柴油机与同等功率的汽油机相比，微粒和NOx是排放中两种最主要的污染物。目前，世界各国都在致力于减少柴油机颗粒排放的技术研究，并且已经取得了实质性的进展。由于柴油机排气微粒与NOx的生成机理不同，因此减少微粒的同时又增加了NOx的排放，同时微粒的减少又使得催化剂中毒得以有效的扼制，从而使采用机外催化技术净化NOx成为可能，柴油机NOx排放的危害。柴油机排出的NOx中，NO约占90%，NO2只是其中很少的一部分。NO无色无味、毒性不大，但高浓度时能导致神经中枢的瘫痪和痉挛，而且NO排入大气后会逐渐被氧化为NO2。NO2是一种有刺激性气味、毒性很强(毒性大约是NO的5倍)的红棕色气体，可对人的呼吸道及肺造成损害，严重时能引起肺气肿。当浓度高达100×10-6体积浓度以上时，会随时导致生命危险。NOx和HC在太阳光作用下会生成光化学烟雾，NOx还会增加周围臭氧的浓度，而臭氧则会破坏植物的生长。此外，NOx还对各种纤维、橡胶、塑料、电子材料等具有不良影响，现在社会处理大型柴油机的装置有喷淋塔，但这种装置较大不方便使用。The main emissions of large diesel engines are PM (particulate matter) and NOx, while CO and HC emissions are relatively low. The control of diesel engine exhaust emissions is mainly to control the generation of PM and NOx, and reduce the direct emissions of PM and NOx. Compared with gasoline engines of the same power, particulate matter and NOx are the two most important pollutants in the emissions of diesel engines. At present, countries all over the world are devoting themselves to technical research on reducing particulate emissions from diesel engines, and substantial progress has been made. Since the formation mechanism of diesel engine exhaust particles and NOx is different, the reduction of particles increases the emission of NOx at the same time. At the same time, the reduction of particles can effectively curb catalyst poisoning, thus making it possible to use external catalytic technology to purify NOx. Diesel engine The hazards of NOx emissions. Among the NOx emitted by diesel engines, NO accounts for about 90%, and NO2 is only a small part of it. NO is colorless, odorless, and not very toxic, but at high concentrations it can cause paralysis and convulsions of the nerve center, and NO will be gradually oxidized to NO2 after being discharged into the atmosphere. NO2 is a reddish-brown gas with a pungent smell and strong toxicity (about 5 times the toxicity of NO), which can cause damage to the human respiratory tract and lungs, and can cause emphysema in severe cases. When the concentration is as high as 100×10-6 volume concentration or more, it will cause life-threatening at any time. NOx and HC will generate photochemical smog under the action of sunlight, and NOx will also increase the concentration of ambient ozone, which will damage the growth of plants. In addition, NOx also has adverse effects on various fibers, rubber, plastics, electronic materials, etc. Nowadays, there are spray towers in the society to deal with large diesel engines, but this kind of device is relatively inconvenient to use.
实用新型内容Utility model content
本实用新型的目的在于提供一种具有过滤净化功能的柴油发动机尾气排放管，以解决上述背景技术中提出的问题。The purpose of this utility model is to provide a diesel engine exhaust pipe with filtering and purifying function, so as to solve the problems raised in the above-mentioned background technology.
为实现上述目的，本实用新型提供如下技术方案：一种具有过滤净化功能的柴油发动机尾气排放管，包括排气管壳体，所述排气管壳体的表面开设有入气孔，所述入气孔的内壁固定连接有入气管道，所述排气管壳体的表面开设有出气孔，所述出气孔的内壁固定连接有出气管，所述排气管壳体的表面开设有尾气排气孔，所述尾气排气孔的内壁固定连接有尾气排气管，所述排气管壳体的表面开设有第一水管孔和第二水管孔，所述排气管壳体的内腔固定连接有过滤净化装置。In order to achieve the above purpose, the utility model provides the following technical solutions: a diesel engine exhaust pipe with filtering and purification functions, including an exhaust pipe casing, the surface of the exhaust pipe casing is provided with an air inlet hole, and the inlet The inner wall of the air hole is fixedly connected with an air inlet pipe, the surface of the exhaust pipe housing is provided with an air outlet hole, the inner wall of the air outlet hole is fixedly connected with an air outlet pipe, and the surface of the exhaust pipe housing is provided with an exhaust exhaust pipe. The inner wall of the exhaust gas exhaust hole is fixedly connected with the exhaust gas exhaust pipe, the surface of the exhaust pipe housing is provided with a first water pipe hole and a second water pipe hole, and the inner cavity of the exhaust pipe housing is fixed Connected with filter purification device.
所述过滤净化装置包括旋流塔层，所述排气管壳体的内腔固定连接有旋流塔层的表面开设有透气孔，所述第一水管孔的内壁固定连接有第一水管，所述第二水管孔的内壁固定连接有第二水管，所述第一水管的表面固定连接有第一物料喷头，所述第二水管的表面固定连接有第二物料喷头，所述第一水管的表面固定连接有主循环水管，所述主循环水管的表面固定连接有抽水循环泵，所述抽水循环泵的抽水管固定连接循环水盒孔，所述循环水盒孔的表面固定连接有循环水盒，所述循环水盒的内腔固定连接有液位计，所述循环水盒的内腔固定连接有循环水，所述循环水盒的表面开设有进水孔，所述进水孔的内壁固定连接有进水水管，所述进水水管的一端开设有外螺纹，所述外螺纹的表面螺纹连接有密封盖，所述排气管壳体的内腔固定连接有灰尘过滤板，所述排气管壳体的内腔固定连接有雾气过滤板。The filtration and purification device includes a swirl tower layer, the inner cavity of the exhaust pipe housing is fixedly connected to the surface of the swirl tower layer with vent holes, the inner wall of the first water pipe hole is fixedly connected to a first water pipe, The inner wall of the second water pipe hole is fixedly connected with a second water pipe, the surface of the first water pipe is fixedly connected with a first material nozzle, the surface of the second water pipe is fixedly connected with a second material nozzle, and the first water pipe The surface of the main circulation pipe is fixedly connected with a main circulation water pipe, the surface of the main circulation water pipe is fixedly connected with a water circulation pump, the water suction pipe of the water circulation pump is fixedly connected with the hole of the circulating water box, and the surface of the hole of the water circulation box is fixedly connected with a circulation Water box, the inner cavity of the circulating water box is fixedly connected with a liquid level gauge, the inner cavity of the circulating water box is fixedly connected with circulating water, the surface of the circulating water box is provided with a water inlet hole, and the water inlet hole The inner wall of the exhaust pipe is fixedly connected with a water inlet pipe, one end of the water inlet pipe is provided with an external thread, the surface of the external thread is threaded with a sealing cover, and the inner cavity of the exhaust pipe housing is fixedly connected with a dust filter plate, A mist filter plate is fixedly connected to the inner cavity of the exhaust pipe housing.
优选的，所述第一水管和第二水管的表面固定连接有主循环水管。Preferably, the surfaces of the first water pipe and the second water pipe are fixedly connected with main circulation water pipes.
优选的，所述抽水循环泵的抽水管的一端贯穿循环水盒孔的内壁并延伸至循环水盒的内腔。Preferably, one end of the suction pipe of the suction circulation pump passes through the inner wall of the hole of the circulation water box and extends to the inner cavity of the circulation water box.
优选的，所述旋流塔层的数量为八个。Preferably, the number of said swirl tower layers is eight.
优选的，所述每一个旋流塔层表面的透气孔的数量为四个。Preferably, the number of vent holes on the surface of each swirl tower layer is four.
优选的，所述第一水管的一端贯穿排气管壳体的内腔并延伸至排气管壳体的表面。Preferably, one end of the first water pipe runs through the inner cavity of the exhaust pipe housing and extends to the surface of the exhaust pipe housing.
有益效果Beneficial effect
本实用新型提供了一种具有过滤净化功能的柴油发动机尾气排放管，该一种具有过滤净化功能的柴油发动机尾气排放管，通过设置旋流塔层和透气孔，使排放的尾气喝水融合净化使可以更有效的反应净化，通过设置第一水管和第二水管，使水运输至排气管壳体的内腔进行配合净化，通过设置主循环水管和抽水循环泵，使水可以一直循环的运作，通过设置排气管壳体和雾气过滤板，使最后净化的气体通过排气管壳体和雾气过滤板过滤掉多余的杂质和垃圾，到达了柴油发动机尾气排放管在管内可以过滤净化的效果。The utility model provides a diesel engine tail gas discharge pipe with the function of filtering and purifying. The diesel engine tail gas discharge pipe with the function of filtering and purifying is provided with a swirl tower layer and air holes to make the discharged tail gas drink water and merge and purify. To enable more effective reaction purification, by setting the first water pipe and the second water pipe, the water is transported to the inner cavity of the exhaust pipe shell for cooperation and purification, and by setting the main circulation water pipe and the water circulation pump, the water can be continuously circulated Operation, by setting the exhaust pipe casing and the mist filter plate, the finally purified gas passes through the exhaust pipe casing and the mist filter plate to filter out excess impurities and garbage, and reaches the exhaust pipe of the diesel engine where it can be filtered and purified. Effect.
附图说明Description of drawings
图1为本实用新型结构正视示意图；Fig. 1 is the schematic diagram of front view of structure of the utility model;
图2为本实用新型结构正剖示意图；Fig. 2 is the schematic diagram of the front section of the structure of the utility model;
图3为本实用新型结构A处放大图。Fig. 3 is an enlarged view of structure A of the utility model.
图中：1排气管壳体、2入气孔、3入气管道、4出气孔、5出气管、6尾气排气孔、7尾气排气管、8第一水管孔、9第二水管孔、10过滤净化装置、1001旋流塔层、1002透气孔、1003第一水管、1004第二水管、1005第一物料喷头、1006第二物料喷头、1007主循环水管、1008抽水循环泵、1009循环水盒孔、1010循环水盒、1011液位计、1012循环水、1013进水孔、1014进水水管、1015外螺纹、1016密封盖、1017灰尘过滤板、1018雾气过滤板。In the figure: 1 Exhaust pipe shell, 2 Air inlet hole, 3 Air inlet pipe, 4 Air outlet hole, 5 Air outlet pipe, 6 Exhaust gas exhaust hole, 7 Exhaust gas exhaust pipe, 8 First water pipe hole, 9 Second water pipe hole , 10 filtration and purification device, 1001 swirl tower layer, 1002 vent hole, 1003 first water pipe, 1004 second water pipe, 1005 first material nozzle, 1006 second material nozzle, 1007 main circulation water pipe, 1008 pumping circulation pump, 1009 circulation Water box hole, 1010 circulating water box, 1011 liquid level gauge, 1012 circulating water, 1013 water inlet hole, 1014 water inlet pipe, 1015 external thread, 1016 sealing cover, 1017 dust filter plate, 1018 fog filter plate.
具体实施方式Detailed ways
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
请参阅图1-3，本实用新型提供一种技术方案：一种具有过滤净化功能的柴油发动机尾气排放管，包括排气管壳体1，排气管壳体1的表面开设有入气孔2，入气孔2的内壁固定连接有入气管道3，排气管壳体1的表面开设有出气孔4，出气孔4的内壁固定连接有出气管5，排气管壳体1的表面开设有尾气排气孔6，尾气排气孔6的内壁固定连接有尾气排气管7，排气管壳体1的表面开设有第一水管孔8和第二水管孔9，排气管壳体1的内腔固定连接有过滤净化装置10。Please refer to Figures 1-3, the utility model provides a technical solution: a diesel engine exhaust pipe with filtering and purification functions, including an exhaust pipe casing 1, and an air inlet hole 2 is opened on the surface of the exhaust pipe casing 1 The inner wall of the air inlet hole 2 is fixedly connected with an air inlet pipe 3, the surface of the exhaust pipe housing 1 is provided with an air outlet hole 4, the inner wall of the air outlet hole 4 is fixedly connected with an air outlet pipe 5, and the surface of the exhaust pipe housing 1 is provided with Exhaust gas exhaust hole 6, the inner wall of exhaust gas exhaust hole 6 is fixedly connected with exhaust gas exhaust pipe 7, the surface of exhaust pipe housing 1 is provided with first water pipe hole 8 and second water pipe hole 9, exhaust pipe housing 1 The inner cavity of the filter is fixedly connected with a filter purification device 10 .
过滤净化装置10包括旋流塔层1001，通过设置旋流塔层1001和透气孔1002，使排放的尾气喝水融合净化使可以更有效的反应净化，通过设置第一水管1003和第二水管1004，使水运输至排气管壳体1的内腔进行配合净化，通过设置主循环水管1007和抽水循环泵1008，使水可以一直循环的运作，通过设置排气管壳体1和雾气过滤板1018，使最后净化的气体通过排气管壳体1和雾气过滤板1018过滤掉多余的杂质和垃圾，到达了柴油发动机尾气排放管在管内可以过滤净化的功能，旋流塔层1001的数量为八个，每一个旋流塔层1001表面的透气孔1002的数量为四个，排气管壳体1的内腔固定连接有旋流塔层1001的表面开设有透气孔1002，第一水管孔8的内壁固定连接有第一水管1003，第一水管1003和第二水管1004的表面固定连接有主循环水管1007，第一水管1003的一端贯穿排气管壳体1的内腔并延伸至排气管壳体1的表面，第二水管孔9的内壁固定连接有第二水管1004，第一水管孔8的表面固定连接有第一物料喷头1005，第二水管1004的表面固定连接有第二物料喷头1006，第一水管1003的表面固定连接有主循环水管1007，主循环水管1007的表面固定连接有抽水循环泵1008，抽水循环泵1008的抽水管的一端贯穿循环水盒孔1009的内壁并延伸至循环水盒1010的内腔，抽水循环泵1008的抽水管固定连接循环水盒孔1009，循环水盒孔1009的表面固定连接有循环水盒1010，循环水盒1010的内腔固定连接有液位计1011，循环水盒1010的内腔固定连接有循环水1012，循环水盒1010的表面开设有进水孔1013，进水孔1013的内壁固定连接有进水水管1014，进水水管1014的一端开设有外螺纹1015，外螺纹1015的表面螺纹连接有密封盖1016，排气管壳体1的内腔固定连接有灰尘过滤板1017，排气管壳体1的内腔固定连接有雾气过滤板1018。The filtration and purification device 10 includes a swirl tower layer 1001. By setting the swirl tower layer 1001 and the vent hole 1002, the exhaust gas and water are fused and purified so that more effective reaction and purification can be achieved. By setting the first water pipe 1003 and the second water pipe 1004 , so that the water is transported to the inner cavity of the exhaust pipe housing 1 for cooperation and purification. By setting the main circulation water pipe 1007 and the pumping circulation pump 1008, the water can be continuously circulated. By setting the exhaust pipe housing 1 and the mist filter plate 1018, make the finally purified gas pass through the exhaust pipe housing 1 and the mist filter plate 1018 to filter out unnecessary impurities and garbage, and reach the function that the exhaust pipe of the diesel engine can be filtered and purified in the pipe. The number of swirl tower layers 1001 is Eight, the number of vent holes 1002 on the surface of each swirl tower layer 1001 is four, and the inner cavity of the exhaust pipe housing 1 is fixedly connected to the surface of the swirl tower layer 1001 with vent holes 1002, the first water pipe hole The inner wall of 8 is fixedly connected with the first water pipe 1003, and the surface of the first water pipe 1003 and the second water pipe 1004 is fixedly connected with the main circulation water pipe 1007, and one end of the first water pipe 1003 runs through the inner cavity of the exhaust pipe housing 1 and extends to the exhaust pipe casing 1. The surface of the trachea shell 1, the inner wall of the second water pipe hole 9 is fixedly connected with the second water pipe 1004, the surface of the first water pipe hole 8 is fixedly connected with the first material nozzle 1005, and the surface of the second water pipe 1004 is fixedly connected with the second water pipe 1004. The material nozzle 1006, the surface of the first water pipe 1003 is fixedly connected with the main circulation water pipe 1007, and the surface of the main circulation water pipe 1007 is fixedly connected with the pumping circulation pump 1008, and one end of the suction pipe of the pumping water circulation pump 1008 runs through the inner wall of the circulating water box hole 1009 and Extending to the inner cavity of the circulating water box 1010, the suction pipe of the water circulation pump 1008 is fixedly connected to the circulating water box hole 1009, the surface of the circulating water box hole 1009 is fixedly connected to the circulating water box 1010, and the inner cavity of the circulating water box 1010 is fixedly connected to the Liquid level gauge 1011, the inner cavity of circulating water box 1010 is fixedly connected with circulating water 1012, the surface of circulating water box 1010 is provided with water inlet hole 1013, the inner wall of water inlet hole 1013 is fixedly connected with water inlet pipe 1014, water inlet pipe 1014 An external thread 1015 is provided at one end of the external thread 1015, the surface of the external thread 1015 is threadedly connected with a sealing cover 1016, the inner cavity of the exhaust pipe housing 1 is fixedly connected with a dust filter plate 1017, and the inner cavity of the exhaust pipe housing 1 is fixedly connected with a mist Filter plate 1018.
工作原理：使用该一种具有过滤净化功能的柴油发动机尾气排气管时，首先手动开启抽水循环泵1008，通过循环泵使第一水管1003和第二水管1004，使水运输至排气管壳体1的内腔进行配合净化，然后通过旋流塔层1001和透气孔1002，使排放的尾气喝水融合净化使可以更有效的反应净化，当气体净化过后要排出时使最后净化的气体通过排气管壳体1和雾气过滤板1018过滤掉多余的杂质和垃圾，到达了柴油发动机尾气排放管在管内可以过滤净化的效果。Working principle: When using this kind of diesel engine exhaust pipe with filtering and purification function, firstly manually turn on the pumping circulation pump 1008, through the circulation pump, the first water pipe 1003 and the second water pipe 1004 are used to transport water to the exhaust pipe shell The inner cavity of the body 1 is used for purification, and then through the swirl tower layer 1001 and the vent hole 1002, the exhaust gas and water are fused and purified, so that the reaction and purification can be more effective. When the gas is purified and needs to be discharged, the final purified gas is passed through The exhaust pipe housing 1 and the mist filter plate 1018 filter out unnecessary impurities and garbage, achieving the effect that the exhaust pipe of the diesel engine can be filtered and purified in the pipe.
尽管已经示出和描述了本实用新型的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本实用新型的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本实用新型的范围由所附权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.
Claims (6)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116291836A (en) * | 2023-04-26 | 2023-06-23 | 中国煤炭科工集团太原研究院有限公司 | Diesel vehicle exhaust pipe with tail gas emission detection function for coal mine auxiliary transportation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116291836A (en) * | 2023-04-26 | 2023-06-23 | 中国煤炭科工集团太原研究院有限公司 | Diesel vehicle exhaust pipe with tail gas emission detection function for coal mine auxiliary transportation |
| CN116291836B (en) * | 2023-04-26 | 2025-06-06 | 中国煤炭科工集团太原研究院有限公司 | Diesel vehicle exhaust pipe with exhaust emission detection function for auxiliary transportation in coal mines |
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