CN106139790B - Welding fume purification system - Google Patents
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- 238000000746 purification Methods 0.000 title claims abstract description 70
- 239000003496 welding fume Substances 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000007921 spray Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000011084 recovery Methods 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims abstract description 11
- 239000002912 waste gas Substances 0.000 claims abstract description 5
- 238000004062 sedimentation Methods 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 9
- 238000012856 packing Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000428 dust Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
本发明公开了一种焊接烟尘净化系统，用于净化风道内的焊接废气，包括：净化装置、喷淋装置和回收装置。净化装置安装在风道内，净化装置包括：框架以及过滤材料，过滤材料设置在框架内；喷淋装置包括：水箱、喷嘴和增压泵，喷嘴与水箱连接，增压泵用于将水箱内的水加压并经由喷嘴喷淋至净化装置；回收装置与水箱连接并将回收后的水输送至水箱。根据本发明的焊接烟尘净化系统，包括净化装置、喷淋装置和回收装置，净化装置安装在风道内，与风道形成一个整体，节约空间且净化效果好。
The invention discloses a welding fume purification system, which is used for purifying welding waste gas in an air duct, comprising: a purification device, a spray device and a recovery device. The purification device is installed in the air duct, and the purification device includes: a frame and filter material, and the filter material is arranged in the frame; the spray device includes: a water tank, a nozzle and a booster pump, the nozzle is connected with the water tank, and the booster pump is used The water is pressurized and sprayed to the purification device through the nozzle; the recovery device is connected with the water tank and sends the recovered water to the water tank. The welding fume purification system according to the present invention includes a purification device, a spray device and a recovery device. The purification device is installed in the air duct and forms an integral body with the air duct, which saves space and has a good purification effect.
Description
技术领域technical field
本发明涉及环保废气净化治理领域，尤其涉及一种焊接烟尘净化系统。The invention relates to the field of environmental protection waste gas purification and treatment, in particular to a welding fume purification system.
背景技术Background technique
集装箱制造行业由于技术发展、资源投入和市场等多重因素的影响，目前，仍属于传统加工制造行业，相对于拥有百年历史的汽车制造业而言，属于较年轻，技术相对不成熟的行业，加工作业多为人员手工操作，自动化设备应用率相对较低。而集装箱制造过程中产生的环境污染问题，也随着近几年国家对环保问题的持续关注显得尤为突出，在整个行业的大背景下，集装箱制造行业的环保问题治理技术发展尤为缓慢，远远落后与其他行业技术。因此，为了响应国家环境保护的政策，积极推进行业技术发展，故针对较为突出的焊烟污染问题做针对性研究，寻找经济实用、技术可靠的新技术。Due to the influence of multiple factors such as technological development, resource input and market, the container manufacturing industry is still a traditional processing and manufacturing industry. Compared with the century-old automobile manufacturing industry, it is a younger industry with relatively immature technology. Processing Most of the work is done manually, and the application rate of automation equipment is relatively low. The environmental pollution problems generated in the container manufacturing process have also become particularly prominent as the country has continued to pay attention to environmental protection issues in recent years. lag behind other industry technologies. Therefore, in order to respond to the national environmental protection policy and actively promote the development of industry technology, targeted research is conducted on the more prominent welding fume pollution problem to find economical, practical and reliable new technologies.
当前，在集装箱制造行业，解决车间内焊烟污染问题主要有以下几种方案：At present, in the container manufacturing industry, there are mainly the following solutions to solve the problem of welding smoke pollution in the workshop:
(1)集气罩顶吸式(1) Top suction type gas collecting hood
该方案最为普遍，经济，实用，应用范围广，技术成熟。原理是在产生焊烟较集中区域的上方，设置安装集气罩，通过负压风机的抽取，将焊烟吸入管道内，通过管道排放到车间外。缺点是需要占用大量台位上方的空间，影响物料吊运和工作区域新鲜空气的补充。The program is the most common, economical, practical, wide range of applications, mature technology. The principle is to install a gas collecting hood above the area where the welding fume is concentrated, and draw the welding fume into the pipe through the suction of the negative pressure fan, and discharge it out of the workshop through the pipe. The disadvantage is that it needs to occupy a lot of space above the platform, which affects the lifting of materials and the replenishment of fresh air in the working area.
(2)局部区域集气管针对焊接点定点收集(2) The gas collecting pipe in the local area is collected at fixed points for welding points
该方案主要应用于焊接位置固定，焊烟产生量大，严重影响人员呼吸，危害职业健康的台位。特点是可实现定点收集，焊烟一旦产生，就会通过管道的吸气口抽走，不会经过员工的呼吸带，具有焊烟收集效果好，占用空间小等优点；缺点是集气口位于焊接点附近，需要人员调节集气口位置，增加人员工作量，影响操作。This solution is mainly used in stations where the welding position is fixed and the amount of welding smoke is large, seriously affecting the breathing of personnel and endangering occupational health. The feature is that it can be collected at a fixed point. Once the welding fume is generated, it will be sucked out through the suction port of the pipeline without passing through the breathing belt of the employee. It has the advantages of good welding fume collection effect and small space occupation; the disadvantage is that the gas collection port is located in the welding Near the point, personnel are required to adjust the position of the gas collection port, which increases the workload of personnel and affects the operation.
(3)单机除尘净化处理方案(3) Stand-alone dust removal and purification treatment plan
单机除尘器是目前市场上大部分环保设备公司大力推广的环保设备，可实现焊烟源头收集，经过机器内部的滤筒净化处理后，再将处理后的空气排放回车间内。该方案的优点是设备小巧灵活，搬运方便，可实现焊烟源头控制，并做净化处理，没有复杂的管道系统，不影响车间布局和物料输送；缺点是设备昂贵，运行成本高，不适合现阶段在集装箱制造行业大范围应用。The stand-alone dust collector is an environmental protection equipment vigorously promoted by most environmental protection equipment companies in the market. It can collect welding fumes at the source, and after being purified by the filter cartridge inside the machine, the treated air is discharged back into the workshop. The advantage of this scheme is that the equipment is small and flexible, easy to carry, can realize the source control of welding fume, and do purification treatment, there is no complicated pipeline system, and does not affect the layout of the workshop and material transportation; the disadvantage is that the equipment is expensive and the operating cost is high, which is not suitable for the current The stage is widely used in the container manufacturing industry.
(4)整体通风处理方案(4) Overall ventilation treatment plan
该方案的原理是通过在车间顶部开设焊烟通风口(可控制开启与关闭)，利用车间内外温度差所形成的压力差，使焊烟自动向车间顶部运动，不利用任何动力装置，实现焊烟自动外排至车间外。该方案的优点是无任何能源消耗，不影响车间内部结构，不影响员工操作和物料输送；缺点是需要对车间顶部做大范围的改动，适用于新建厂房设计。The principle of this scheme is to open a welding fume vent on the top of the workshop (which can be controlled to open and close), and use the pressure difference formed by the temperature difference between the inside and outside of the workshop to make the welding fume automatically move to the top of the workshop without using any power device to realize welding. The smoke is automatically exhausted to the outside of the workshop. The advantage of this solution is that it does not consume any energy, does not affect the internal structure of the workshop, and does not affect the operation of employees and material transportation; the disadvantage is that it needs to make extensive changes to the top of the workshop, which is suitable for the design of new workshops.
发明内容Contents of the invention
在发明内容部分中引入了一系列简化形式的概念，这将在具体实施方式部分中进一步详细说明。本发明的发明内容部分并不意味着要试图限定出所要求保护的技术方案的关键特征和必要技术特征，更不意味着试图确定所要求保护的技术方案的保护范围。A series of concepts in simplified form are introduced in the Summary of the Invention, which will be further detailed in the Detailed Description. The summary of the invention in the present invention does not mean to limit the key features and essential technical features of the claimed technical solution, nor does it mean to try to determine the protection scope of the claimed technical solution.
为了解决上述问题，本发明公开了一种焊接烟尘净化系统，用于净化风道内的焊接废气，其特征在于，包括：净化装置，所述净化装置安装在所述风道内，所述净化装置包括：框架；以及过滤材料，所述过滤材料设置在所述框架内；喷淋装置；所述喷淋装置包括：水箱；喷嘴，所述喷嘴与所述水箱连接；以及增压泵，所述增压泵用于将所述水箱内的水加压并经由所述喷嘴喷淋至所述净化装置，以及回收装置，所述回收装置与所述水箱连接并将回收后的水输送至所述水箱。In order to solve the above problems, the present invention discloses a welding fume purification system, which is used to purify the welding waste gas in the air duct, which is characterized in that it includes: a purification device installed in the air duct, the purification device includes Frame; and filter material, the filter material is arranged in the frame; spray device; the spray device includes: water tank; nozzle, the nozzle is connected with the water tank; and a booster pump, the booster The pressure pump is used to pressurize the water in the water tank and spray it to the purification device through the nozzle, and the recovery device, the recovery device is connected to the water tank and delivers the recovered water to the water tank .
可选地，所述回收装置包括：沉淀池，所述沉淀池用于接收所述喷嘴喷淋至所述净化装置的喷淋水；清水池，所述清水池与所述沉淀池的上部连通；以及水泵，所述水泵将所述清水池中的水泵送至所述水箱。Optionally, the recovery device includes: a sedimentation tank, the sedimentation tank is used to receive the spray water sprayed by the nozzle to the purification device; a clear water tank, the clear water tank communicates with the upper part of the sedimentation tank and a water pump, the water pump pumps the water in the clean water tank to the water tank.
可选地，所述过滤材料为陶瓷波纹填料。Optionally, the filter material is ceramic corrugated packing.
可选地，所述净化装置与风道成角度设置。Optionally, the purification device is arranged at an angle to the air duct.
可选地，所述角度为45度至75度。Optionally, the angle is 45 degrees to 75 degrees.
可选地，所述角度为75度。Optionally, the angle is 75 degrees.
可选地，所述清水池中设置有液位传感器。Optionally, a liquid level sensor is set in the clear water pool.
可选地，所述净化装置包括多个框架，多个框架之间可拆卸地连接。Optionally, the purification device includes a plurality of frames, which are detachably connected to each other.
根据本发明的焊接烟尘净化系统，包括净化装置、喷淋装置和回收装置，净化装置安装在风道内，与风道形成一个整体，节约空间且净化效果好，另外净化用水循环利用，节约资源。The welding fume purification system according to the present invention includes a purification device, a spray device and a recovery device. The purification device is installed in the air duct and forms an integral body with the air duct, which saves space and has a good purification effect. In addition, the purified water is recycled to save resources.
附图说明Description of drawings
本发明实施方式的下列附图在此作为本发明的一部分用于理解本发明。附图中示出了本发明的实施方式及其描述，用来解释本发明的原理。在附图中，The following drawings of the embodiments of the present invention are hereby included as part of the present invention for understanding the present invention. Embodiments of the present invention and description thereof are shown in the drawings to explain the principles of the present invention. In the attached picture,
图1为按照本发明的一个实施方式的焊接烟尘净化系统的正视图；以及Figure 1 is a front view of a welding fume purification system according to one embodiment of the present invention; and
图2为图1中的净化装置的示意图。FIG. 2 is a schematic diagram of the purification device in FIG. 1 .
附图标记说明：Explanation of reference signs:
10、喷淋装置 11、水箱10. Spraying device 11. Water tank
12、水管 14、喷嘴12. Water pipe 14. Nozzle
20、净化装置 21、陶瓷波纹填料20. Purification device 21. Ceramic corrugated packing
22、框架 30、回收装置22. Frame 30. Recovery device
31、沉淀池 32、清水池31. Sedimentation tank 32. Clear water tank
33、液位传感器 34、水泵33. Liquid level sensor 34. Water pump
40、负压风机40. Negative pressure fan
具体实施方式Detailed ways
在下文的描述中，给出了大量具体的细节以便提供对本发明更为彻底的理解。然而，对于本领域技术人员来说显而易见的是，本发明实施方式可以无需一个或多个这些细节而得以实施。在其他的例子中，为了避免与本发明实施方式发生混淆，对于本领域公知的一些技术特征未进行描述。In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that embodiments of the invention may be practiced without one or more of these details. In other examples, some technical features known in the art are not described in order to avoid confusion with the embodiments of the present invention.
为了彻底了解本发明实施方式，将在下列的描述中提出详细的构件。显然，本发明实施方式的施行并不限定于本领域的技术人员所熟习的特殊细节。本发明的较佳实施方式详细描述如下，然而除了这些详细描述外，本发明还可以具有其他实施方式。In order to provide a thorough understanding of the embodiments of the present invention, detailed components will be set forth in the following description. It is evident that practice of the embodiments of the invention is not limited to specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions.
首先参考图1，本发明公开了一种焊接烟尘净化系统，用于净化风道内的焊接废气。具体地，焊接烟尘净化系统包括：净化装置20、喷淋装置10以及回收装置30。Referring first to FIG. 1 , the present invention discloses a welding fume purification system for purifying welding waste gas in an air duct. Specifically, the welding fume purification system includes: a purification device 20 , a spray device 10 and a recovery device 30 .
净化装置20安装在风道内，如图2所示，其可由诸如角钢的框架22以及过滤材料组成。在图示实施方式中，过滤材料为陶瓷波纹填料21，其设置在框架22内。净化装置20的框架22可设置为多个，多个框架22之间可拆卸地连接，方便后续使用过程中将单个框架22拆下进行清洗或更换。即净化装置20可包括多个过滤模块，每一个过滤模块包括框架和设置在框架中的过滤材料，相邻两个过滤模块之间可拆卸地连接。The purification device 20 is installed in the air duct, as shown in FIG. 2 , which may be composed of a frame 22 such as angle steel and filter materials. In the illustrated embodiment, the filter material is a ceramic corrugated packing 21 disposed within a frame 22 . Multiple frames 22 of the purification device 20 can be provided, and the multiple frames 22 are detachably connected to facilitate the removal of a single frame 22 for cleaning or replacement during subsequent use. That is, the purification device 20 may include a plurality of filter modules, each filter module includes a frame and a filter material disposed in the frame, and two adjacent filter modules are detachably connected.
可选地，净化装置可采取模块化设计，以2*2台1380mm*1380mm的负压风机的尺寸为一个净化装置。净化装置的周边用角钢做框架22，将陶瓷波纹填料21固定在框架22内，根据负压风机的分布情况，对应布置，降低风阻。可选地，净化装置可与风道呈45-75度角设置，以增大接触面积，降低系统阻力，进一步可选地，净化装置20与风道可呈75度角设置，即净化装置的陶瓷波纹填料21及框架22与水平面呈75度角设置。Optionally, the purification device can adopt a modular design, with the size of 2*2 negative pressure fans of 1380mm*1380mm as a purification device. Angle steel is used as the frame 22 around the purification device, and the ceramic corrugated packing 21 is fixed in the frame 22. According to the distribution of the negative pressure fans, corresponding arrangements are made to reduce wind resistance. Optionally, the purification device can be arranged at an angle of 45-75 degrees with the air duct to increase the contact area and reduce system resistance. Further optionally, the purification device 20 and the air duct can be arranged at an angle of 75 degrees, that is, the angle of the purification device 20 can be set at 75 degrees. The ceramic corrugated filler 21 and the frame 22 are arranged at an angle of 75 degrees to the horizontal plane.
过滤材料是焊烟粉尘能否被净化决定因素。应当选择合适型号的陶瓷波纹填料21，其主要参考的规格参数是：材质、孔隙率、比表面积和压降。另外，陶瓷波纹填料21应采取模块化设计，方便后续使用过程中的清洗、拆换。The filter material is the determining factor of whether the welding fume dust can be purified. The appropriate type of ceramic corrugated packing 21 should be selected, and the main parameters for reference are: material, porosity, specific surface area and pressure drop. In addition, the ceramic corrugated packing 21 should adopt a modular design to facilitate cleaning and replacement during subsequent use.
如图1所示，喷淋装置10包括：水箱11，水箱11中贮存有喷淋用水。喷嘴14经由管道与水箱11连接。此外，还设置有增压泵，用于将水箱11内的水加压并经由喷嘴14喷淋至净化装置20，特别地，喷淋到陶瓷波纹填料21上。As shown in FIG. 1 , the spraying device 10 includes: a water tank 11 , in which water for spraying is stored. The nozzle 14 is connected to the water tank 11 via a pipe. In addition, a booster pump is also provided for pressurizing the water in the water tank 11 and spraying it to the purification device 20 through the nozzle 14 , especially to the ceramic corrugated filler 21 .
通过增压泵将管道内的喷淋水增压，再经过喷头14均匀的喷洒在过滤材料表面，形成液膜捕集颗粒粉尘。可通过控制系统对喷淋系统10进行控制，诸如控制喷淋系统10的压力、喷淋量和喷淋频次。若喷淋量少，无法在过滤材料表面形成液膜，无法起到净化过滤效果；若喷淋量过多，就会形成“液泛”，阻碍气流通过，使得焊接烟尘净化系统的阻力增大。The spray water in the pipeline is pressurized by the booster pump, and then evenly sprayed on the surface of the filter material through the nozzle 14 to form a liquid film to trap particle dust. The spraying system 10 can be controlled by a control system, such as controlling the pressure, spraying volume and spraying frequency of the spraying system 10 . If the amount of spraying is small, a liquid film cannot be formed on the surface of the filter material, and the effect of purification and filtration cannot be achieved; if the amount of spraying is too large, "flooding" will be formed, hindering the passage of airflow, and increasing the resistance of the welding fume purification system .
可选地，回收装置30包括：沉淀池31、清水池32以及水泵34。沉淀池31用于接收喷嘴14喷淋至净化装置20的喷淋水(污水)。清水池32与沉淀池31的上部连通；水泵34将清水池32中的水(清水)泵送至水箱11。当然，回收装置30也可以为过滤等方式回收清水，而非沉淀的方式。Optionally, the recovery device 30 includes: a sedimentation tank 31 , a clean water tank 32 and a water pump 34 . The sedimentation tank 31 is used to receive the spray water (sewage water) sprayed by the nozzle 14 to the purification device 20 . The clean water tank 32 communicates with the upper part of the sedimentation tank 31 ; the water pump 34 pumps the water (clear water) in the clean water tank 32 to the water tank 11 . Of course, the recovery device 30 can also recover clean water by means of filtration, etc., instead of sedimentation.
在图示实施方式中，沉淀池31和清水池32位于净化装置20的下方，沉淀池31用于接住、蓄积、沉淀过滤从净化装置20上面掉落下来的喷淋水，将颗粒粉尘泥浆蓄积并集中处理。然后，沉淀池31上层的清水进入清水池32，当液面达到一定高度时，触发液位传感器33，水泵启动，将清水池32中的上层清水抽到水箱11内再次利用。In the illustrated embodiment, the sedimentation tank 31 and the clear water tank 32 are located below the purification device 20, and the sedimentation tank 31 is used to catch, store, settle and filter the spray water dropped from the purification device 20, and the particle dust mud Accumulate and centralize processing. Then, the clear water on the upper layer of the settling tank 31 enters the clear water tank 32, and when the liquid level reaches a certain height, the liquid level sensor 33 is triggered, and the water pump starts, and the upper layer of clear water in the clear water tank 32 is pumped into the water tank 11 for reuse.
由此，将水雾喷淋到净化装置20的表面，以覆盖在净化装置20表面上的液膜捕集焊烟中的粉尘颗粒。再对填料定期进行反冲洗，将内部残留的粉尘颗粒清理出来，能够保证填料的过滤性能。Thus, the water mist is sprayed onto the surface of the purification device 20 , so that the liquid film covering the surface of the purification device 20 traps the dust particles in the welding fumes. Then backwash the packing regularly to clean out the residual dust particles inside, which can ensure the filtering performance of the packing.
净化装置20设置在风道内，从而将在风道内的焊接烟尘净化，而喷淋到净化装置20上的水提高了净化效果，并且喷淋水可在回收装置30中沉淀并循环利用，节约了能源。The purification device 20 is arranged in the air duct, thereby purifying the welding fumes in the air duct, and the water sprayed onto the purification device 20 improves the purification effect, and the spray water can be deposited and recycled in the recovery device 30, saving energy.
而且，风道可设置在地下，以充分利用地下空间。焊接台位的底部通风抽排焊烟，风道使用方形负压风机40作为动力，既能够起到收集焊烟净化车间空气的作用，也可以促进厂房通风。而焊烟净化系统设置在风道出口前的主风道内，其能够兼具焊烟处理与车间通风双重功能，设备少，易于保养维护。Moreover, the air duct can be set underground to make full use of the underground space. The bottom of the welding station is ventilated and exhausted. The air duct uses a square negative pressure fan 40 as power, which can not only collect welding fumes to purify the air in the workshop, but also promote the ventilation of the workshop. The welding fume purification system is set in the main air duct before the air duct outlet, which can have dual functions of welding fume treatment and workshop ventilation, with less equipment and easy maintenance.
参考图1，为了达到更好的净化效果，净化装置20可以与风道成一定角度设置，该角度为与风道进风方向的夹角，诸如在45度至75度之间，进一步可选地，以75度设置。这样，净化装置能够更好地净化风道中的焊接烟尘。Referring to Fig. 1, in order to achieve a better purification effect, the purification device 20 can be set at a certain angle with the air duct, which is the angle with the air inlet direction of the air duct, such as between 45 degrees and 75 degrees, further optionally , set at 75 degrees. In this way, the purification device can better purify the welding fumes in the air duct.
可选地，清水池32中可设置有液位传感器33，当清水池32中的水面高度达到液位传感器33的位置，则气动水泵34将清水池32中的水泵34送至水箱11。这样，可以控制水泵34的开启。另外，本领域技术人员应当知道，多个液位传感器33可以在清水池32的高度方向间隔设置，以精确的控制水泵34的开启和停止。Optionally, a liquid level sensor 33 may be provided in the clean water tank 32 , and when the water level in the clean water tank 32 reaches the position of the liquid level sensor 33 , the pneumatic water pump 34 will send the water pump 34 in the clean water tank 32 to the water tank 11 . In this way, the activation of the water pump 34 can be controlled. In addition, those skilled in the art should know that a plurality of liquid level sensors 33 can be arranged at intervals in the height direction of the clean water tank 32 to precisely control the start and stop of the water pump 34 .
本发明已经通过上述实施方式进行了说明，但应当理解的是，上述实施方式只是用于举例和说明的目的，而非意在将本发明限制于所描述的实施方式范围内。此外本领域技术人员可以理解的是，本发明并不局限于上述实施方式，根据本发明的教导还可以做出更多种的变型和修改，这些变型和修改均落在本发明所要求保护的范围以内。The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of illustration and description, and are not intended to limit the present invention within the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the claimed scope of the present invention. within the range.
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