CN108955989B - Test device and test method for determining internal water pressure of water-injected coal seam cracks - Google Patents
Test device and test method for determining internal water pressure of water-injected coal seam cracks Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 167
- 239000003245 coal Substances 0.000 title claims abstract description 47
- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 238000005192 partition Methods 0.000 claims abstract description 11
- 239000011148 porous material Substances 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 19
- 239000012528 membrane Substances 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 8
- 230000008961 swelling Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
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Abstract
Description
技术领域technical field
本发明涉及孔隙水压力测试技术领域，具体涉及一种用于确定煤层注水钻孔周围煤体裂隙结构中水压力的测试装置及测试方法。The invention relates to the technical field of pore water pressure testing, in particular to a testing device and a testing method for determining water pressure in a coal body fissure structure around a coal seam water injection borehole.
背景技术Background technique
煤层注水是目前世界上普遍使用的矿井灾害综合防治技术，经历几十年的实践与发展，到目前为止，我国已有接近80％的综采工作面采用了煤层注水技术。近年来，随着这一技术及工艺的不断进步，煤层注水技术的应用领域也在不断扩大，从开始的减尘、防治冲击地压、煤与瓦斯突出等灾害，到目前发展到可以消除煤层中的硫化氢等有毒气体，同时还被广泛地应用于软化坚硬顶板及放顶煤开采等领域。煤层注水措施实施过程中，不同瓦斯赋存、煤体硬度、孔隙结构、润湿特性、煤层中水的赋存状态随注水压力变化迥异，因此及时调整煤层注水过程中的注水压力对于提高煤层注水防灾效果具有重要的作用，而能够精确地获得注水煤层裂隙内部的水压力则成为了调整注水压力的前提条件。Coal seam water injection is a commonly used comprehensive mine disaster prevention and control technology in the world. After decades of practice and development, nearly 80% of fully mechanized mining faces in my country have adopted coal seam water injection technology. In recent years, with the continuous progress of this technology and process, the application field of coal seam water injection technology is also expanding. At the same time, it is also widely used in the fields of softening hard roof and top coal mining. During the implementation of coal seam water injection measures, different gas occurrences, coal body hardness, pore structure, wettability characteristics, and the occurrence state of water in the coal seam vary greatly with the water injection pressure. The disaster prevention effect plays an important role, and the ability to accurately obtain the water pressure inside the cracks of the water-injected coal seam has become a precondition for adjusting the water-injection pressure.
现有技术中测定注水钻孔周围煤体中流体压力的方法为：施工钻孔—铺设测压管路—封孔—孔口安设压力表—读数，该方法中压力表显示的压力为气、水两相的综合压力，而水的压力无法准确测定。The method for measuring the fluid pressure in the coal body around the water injection hole in the prior art is: construction of the drilling hole—laying the pressure measuring pipeline—sealing the hole—installing a pressure gauge at the orifice—reading, and the pressure displayed by the pressure gauge in this method is gas. , the comprehensive pressure of the two phases of water, and the pressure of water cannot be accurately measured.
发明内容SUMMARY OF THE INVENTION
为了解决上述现有技术中存在的缺陷，本发明提出了一种用于确定注水煤层裂隙内部水压力的测试装置及测试方法，其通过现场试验可以获得测试部分进水孔的孔径，以该孔径为中间量，根据washburn方程中的毛细孔径和水压力之间的关系，可以计算出煤层注水钻孔周围煤体裂隙结构中的水压力。In order to solve the above-mentioned defects in the prior art, the present invention proposes a testing device and testing method for determining the internal water pressure of water-injected coal seam cracks. is an intermediate quantity, and according to the relationship between the capillary pore size and water pressure in the Washburn equation, the water pressure in the fracture structure of the coal body around the water injection hole in the coal seam can be calculated.
本发明的任务之一在于提供一种用于确定注水煤层裂隙内部水压力的测试装置，其技术解决方案包括：One of the tasks of the present invention is to provide a test device for determining the internal water pressure of water-injected coal seam cracks, the technical solutions of which include:
一种用于确定注水煤层裂隙内部水压力的测试装置，其包括测试机构和显示机构，所述的测试机构包括外壳、滤水膜、透水钢网、吸水膨胀橡胶、正极接电头、负极接电头及防爆电源，所述的外壳为圆柱形，在所述外壳上设置有若干个不同孔径的进水孔，在所述外壳内部的圆柱形空腔内设置有若干个隔板，若干个隔板将所述圆柱形空腔分割为若干个密封腔，在所述的圆柱形空腔的圆心处设置有一隔水橡胶管，所述的隔水橡胶管内用于放置与所述防爆电源连接的线路；A test device for determining the internal water pressure of water-injected coal seam cracks, which includes a test mechanism and a display mechanism, and the test mechanism includes a casing, a water filter membrane, a water-permeable steel mesh, a water-absorbing expansion rubber, a positive electrode connection head, and a negative electrode connection. The electric head and the explosion-proof power supply, the casing is cylindrical, a plurality of water inlet holes with different apertures are arranged on the casing, a plurality of partitions are arranged in the cylindrical cavity inside the casing, a plurality of The partition divides the cylindrical cavity into several sealed cavities, and a water-resisting rubber tube is arranged at the center of the cylindrical cavity, and the water-resisting rubber tube is used to place the connection with the explosion-proof power supply. line;
所述的吸水膨胀橡胶对应放置在所述的密封腔内，所述吸水膨胀橡胶与外壳之间依次设置所述透水钢网和滤水膜，所述的滤水膜用于将水中含有的杂质进行隔离，当所述吸水膨胀橡胶吸水进行膨胀反应时，所述的透水钢网用于保护所述的滤水膜，并使得吸水膨胀橡胶向一侧进行运动；The water-absorbing swellable rubber is correspondingly placed in the sealing cavity, the water-absorbing steel mesh and the water-filtering membrane are sequentially arranged between the water-absorbing swellable rubber and the casing, and the water-absorbing membrane is used to remove impurities contained in the water. For isolation, when the water-absorbing swellable rubber absorbs water and performs an expansion reaction, the water-permeable steel mesh is used to protect the water-filtering membrane, and makes the water-absorbing swellable rubber move to one side;
所述的显示机构包括外接导线、指示灯及开关，所述的外接导线与所述防爆电源连接的线路连接；The display mechanism includes an external wire, an indicator light and a switch, and the external wire is connected to the line connecting the explosion-proof power supply;
所述的吸水膨胀橡胶内部设置有导线，其一端设置有正极接头，所述的吸水膨胀橡胶与所述密封腔之间还留有一定的膨胀空间，在所述的膨胀空间相邻处设置所述防爆电源，所述负极接头位于所述防爆电源处，当所述吸水膨胀橡胶吸水进行膨胀反应时，所述的正极接头与负极接头相连，此时使得防爆电源与显示机构之间形成电流闭合回路，并通过显示机构的指示灯显示。The water-swellable rubber is internally provided with a wire, and one end thereof is provided with a positive terminal. There is still a certain expansion space between the water-swellable rubber and the sealing cavity, and a certain expansion space is arranged adjacent to the expansion space. In the explosion-proof power supply, the negative terminal is located at the explosion-proof power supply. When the water-absorbing expansion rubber absorbs water and performs an expansion reaction, the positive terminal is connected to the negative terminal, so that a current closure is formed between the explosion-proof power supply and the display mechanism. circuit, and displayed by the indicator light of the display mechanism.
作为本发明的一个优选方案，所述的隔板焊接在所述圆柱形空腔内。As a preferred solution of the present invention, the separator is welded in the cylindrical cavity.
作为本发明的另一个优选方案，所述的滤水膜为RO膜。As another preferred solution of the present invention, the water filtration membrane is an RO membrane.
本发明的另一任务在于提供一种用于确定注水煤层裂隙内部水压力的测试方法，其采用上述的测试装置，所述的测试方法包括以下步骤：Another task of the present invention is to provide a test method for determining the internal water pressure of water-injected coal seam cracks, which adopts the above-mentioned test device, and the test method includes the following steps:
a根据煤层注水作业方案，设计密封腔个数及对应进水孔大小，并进行加工，其后待煤层注水钻孔施工完毕后，在注水钻孔周围施工若干水压力测试孔；a According to the coal seam water injection operation plan, design the number of sealed cavities and the size of the corresponding water inlet holes, and process them. After the construction of the coal seam water injection holes is completed, construct several water pressure test holes around the water injection holes;
b、进行煤层注水作业之前，将测试机构与显示机构相连，确定各个密封腔与指示灯的连接顺序，并验证电路可靠性，待验证完成后，将测试机构推入水压力测试孔底部，并进行封孔作业；b. Before the coal seam water injection operation, connect the test mechanism to the display mechanism, determine the connection sequence of each sealing cavity and the indicator light, and verify the reliability of the circuit. After the verification is completed, push the test mechanism into the bottom of the water pressure test hole, and Carry out hole sealing operation;
c、煤层注水作业开始后，不同孔径的进水孔代表不同尺寸的毛细管，通过设置不同孔径的进水孔，以使低压水能够通过大孔进入低压密封腔内，使高压水通过小孔进入高压密封腔内；观测显示机构的指示灯，待某一指示灯明亮后，测定相关参数后，根据式(1)所示的washburn方程，利用密封腔进水孔大小计算水压力；c. After the coal seam water injection operation starts, the water inlet holes with different diameters represent capillaries of different sizes. By setting the water inlet holes with different diameters, the low-pressure water can enter the low-pressure sealed cavity through the large holes, and the high-pressure water can enter through the small holes. Inside the high-pressure sealing chamber; observe the indicator light of the display mechanism, after a certain indicator light is on, after measuring the relevant parameters, according to the Washburn equation shown in formula (1), use the size of the water inlet hole of the sealing chamber to calculate the water pressure;
式(1)中，Pc-孔径r相对应的毛管压力；σ、θ-液体的表面张力和接触角；In formula (1), P c - the capillary pressure corresponding to the aperture r; σ, θ - the surface tension and contact angle of the liquid;
d、待水压力计算完成后，根据计算结果，及时调整注水参数；d. After the water pressure calculation is completed, adjust the water injection parameters in time according to the calculation results;
e、待水压力测试完成后，回收显示机构，以便进行循环使用。e. After the water pressure test is completed, the display mechanism is recovered for recycling.
本发明所带来的有益技术效果为：The beneficial technical effects brought by the present invention are:
本发明利用煤层裂隙中存在气、水两相时，当水压力达到一定数值后方可克服气体压力和毛细管阻力进入更小的毛细管结构这一原理，设计了一种水压力测试装置，当煤层裂隙中存在气水两相时，只有水的压力达到一定程度后方可克服气体压力进入更小的毛细管结构中，因此在测试机构外壳上设置有代表不同尺寸毛细管的不同孔径外部进水孔，以使低压水能够通过大孔进入测试装置内部低压密封腔，使高压水通过较小的孔进入高压密封腔内；同时由于R.O膜只让水分子通过的特性，可以将水中的泥沙等杂质隔离在外，待水进入某一密封腔后，吸水膨胀橡胶在水的作用下会发生膨胀反应，由于在其外部设置有一层透水钢网，导致该密封腔内的吸水膨胀橡胶只能向装置一侧进行运动，待其运动到一定程度后，该密封腔内的电源正负极接电头相连，使内部防爆电源与外部显示机构形成电流闭合回路，从而使外部显示机构上对应该密封腔的指示灯变亮。其后根据washburn方程中的毛细孔径和水压力之间的关系，可以计算出煤层注水钻孔周围煤体裂隙结构中的水压力。The invention utilizes the principle that when there are two phases of gas and water in the coal seam cracks, when the water pressure reaches a certain value, the gas pressure and the capillary resistance can be overcome to enter the smaller capillary structure, and a water pressure test device is designed. When there are two phases of gas and water, only the water pressure can overcome the gas pressure and enter the smaller capillary structure after the pressure reaches a certain level. The low-pressure water can enter the low-pressure sealing chamber inside the test device through the large hole, so that the high-pressure water enters the high-pressure sealing chamber through the smaller hole; at the same time, due to the characteristic that the R.O membrane only allows water molecules to pass through, it can isolate the sediment and other impurities in the water. , after the water enters a certain sealing cavity, the water-absorbing swellable rubber will undergo an expansion reaction under the action of water. Since a layer of water-permeable steel mesh is arranged on the outside, the water-absorbing swellable rubber in the sealing cavity can only be carried out to the side of the device. After it moves to a certain extent, the positive and negative poles of the power supply in the sealed cavity are connected to the electrical heads, so that the internal explosion-proof power supply and the external display mechanism form a current closed loop, so that the external display mechanism corresponds to the sealed cavity. Brighten. Then, according to the relationship between the capillary pore size and water pressure in the Washburn equation, the water pressure in the fracture structure of the coal body around the water injection hole in the coal seam can be calculated.
本发明装置的使用可以对煤层注水过程中钻孔周围煤体内部的水压力进行精确地定量计算，其计算结果对于调整煤层注水参数，提高煤层注水综合防灾效果具有重要的作用。The use of the device of the invention can accurately and quantitatively calculate the water pressure inside the coal body around the borehole during the coal seam water injection process, and the calculation results have an important role in adjusting the coal seam water injection parameters and improving the comprehensive disaster prevention effect of the coal seam water injection.
附图说明Description of drawings
下面结合附图对本发明做进一步说明：The present invention will be further described below in conjunction with the accompanying drawings:
图1为本发明中测试机构的结构示意图；Fig. 1 is the structural representation of testing mechanism in the present invention;
图2为本发明中测试机构的剖面示意图；2 is a schematic cross-sectional view of a testing mechanism in the present invention;
图3为本发明中显示机构的结构示意图；3 is a schematic structural diagram of a display mechanism in the present invention;
图中，1-外壳，2-较大进水孔，3-R.O滤水膜，4-透水钢网，5-吸水膨胀橡胶，6-正极接电头，7-负极接电头，8-较小进水孔，9-导线，10-密封腔，11-防爆电源，12-电源腔，13-隔水橡胶管，14-隔板，15-指示灯，16-外接导线，17-开关。In the figure, 1-shell, 2-large water inlet hole, 3-R.O water filter membrane, 4-water-permeable steel mesh, 5-water-absorbing swelling rubber, 6-positive terminal, 7-negative terminal, 8- Small water inlet, 9-wire, 10-sealed cavity, 11-explosion-proof power supply, 12-power supply cavity, 13-waterproof rubber tube, 14-partition plate, 15-indicator light, 16-external wire, 17-switch .
具体实施方式Detailed ways
本发明提出了一种用于确定注水煤层裂隙内部水压力的测试装置及测试方法，为了使本发明的优点、技术方案更加清楚、明确，下面结合具体实施例对本发明做详细说明。The present invention proposes a testing device and testing method for determining the water pressure inside the water-flooding coal seam crack.
结合图1至图3所示，一种用于确定注水煤层裂隙内部水压力的测试装置，包括测试机构和显示机构，测试机构包括外壳1、较大进水孔2、R.O滤水膜3、透水钢网4、吸水膨胀橡胶5、正极接电头6、负极接电头7、较小进水孔8、导线9、密封腔10、防爆电源11、电源腔12、隔水橡胶管13及隔板14，外壳1形状为圆柱形，在外壳上设置若干个不同孔径的进水孔，即较大进水孔2和较小进水孔8，在外壳内部的圆柱形空腔内设置若干个隔板14，若干个隔板14将圆柱形空腔分割为若干个密封腔10，在圆柱形空腔的圆心处设置一隔水橡胶管13，隔水橡胶管内用于放置与防爆电源连接的线路。1 to 3, a test device for determining the internal water pressure of water-injected coal seam cracks includes a test mechanism and a display mechanism. The test mechanism includes a casing 1, a larger water inlet hole 2, an R.O water filter membrane 3, Water-permeable steel mesh 4, water-swellable rubber 5, positive terminal 6, negative terminal 7, small water inlet 8, lead 9, sealed cavity 10, explosion-proof power supply 11, power supply cavity 12, water-proof rubber tube 13 and The partition plate 14, the shape of the outer shell 1 is cylindrical, and a number of water inlet holes with different apertures are arranged on the outer shell, that is, the larger water inlet hole 2 and the smaller water inlet hole 8, and several water inlet holes are arranged in the cylindrical cavity inside the outer shell. A number of partitions 14, a plurality of partitions 14 divide the cylindrical cavity into several sealed cavities 10, a water-resisting rubber tube 13 is arranged at the center of the cylindrical cavity, and the water-resisting rubber tube is used to place the connection with the explosion-proof power supply. 's line.
显示机构包括指示灯15、外接导线16及开关17，指示灯15设置有多个，测试时分别对应连接不同的密封腔。The display mechanism includes an indicator light 15 , an external wire 16 and a switch 17 . There are a plurality of indicator lights 15 , which are respectively connected to different sealed cavities during testing.
上述外壳1由高强度钢管制成，若干个不同孔径的进水孔代表了不同尺寸毛细管，当煤层裂隙中存在气水两相时，只有水的压力达到一定程度后方可克服气体压力进入更小的毛细管结构中，因此低压水能够通过较大进水孔2进入低压密封腔，使高压水通过较小进水孔8进入高压密封腔内，密封腔由隔板14在圆柱形空腔内焊接隔离而成，在密封腔外部分别设置R.O滤水膜3及透水钢网4，R.O滤水膜只让水分子通过，可以将水中的泥沙等杂质隔离在外，透水钢网带有一定强度，可以在吸水膨胀橡胶进行膨胀反应时保护R.O膜及防止阻塞进水孔，并保证密封腔内的吸水膨胀橡胶5只能向装置一侧进行运动，吸水膨胀橡胶带有高弹性和较好的机械强度，使得橡胶在吸水后可膨胀几倍至几百倍，吸水膨胀橡胶内部设置导线，一端设置有电源正极接头，待吸水膨胀橡胶和水发生反应后，密封腔内的电源正负极接电头相连，使内部防爆电源与外部显示机构形成电流闭合回路，从而使外部显示机构上对应该密封腔的指示灯变亮。The above-mentioned shell 1 is made of high-strength steel pipes, and several water inlet holes with different diameters represent capillaries of different sizes. When there are two phases of gas and water in the coal seam cracks, only the water pressure can overcome the gas pressure and enter the smaller one after the pressure reaches a certain level. In the capillary structure, the low-pressure water can enter the low-pressure sealing chamber through the larger water inlet hole 2, so that the high-pressure water enters the high-pressure sealing chamber through the smaller water inlet hole 8, and the sealing chamber is welded by the baffle 14 in the cylindrical cavity. The R.O water filter membrane 3 and the permeable steel mesh 4 are respectively set outside the sealing chamber. The R.O water filter membrane only allows water molecules to pass through, which can isolate impurities such as sediment in the water. The permeable steel mesh has a certain strength, It can protect the R.O membrane and prevent the water inlet hole from being blocked when the water-swellable rubber is undergoing expansion reaction, and ensure that the water-swellable rubber 5 in the sealed cavity can only move to one side of the device. The water-swellable rubber has high elasticity and good mechanical properties. The strength enables the rubber to expand several times to hundreds of times after absorbing water. A wire is set inside the water-absorbing rubber, and one end is provided with a positive terminal of the power supply. After the water-absorbing rubber reacts with water, the positive and negative electrodes of the power supply in the sealed cavity are connected to electricity. The head is connected to make the internal explosion-proof power supply and the external display mechanism form a current closed loop, so that the indicator light corresponding to the sealed cavity on the external display mechanism is brightened.
待某一指示灯亮后，根据washburn方程中的毛细孔径和水压力之间的关系，可以计算出煤层注水钻孔周围煤体裂隙结构中的水压力。After a certain indicator light is on, according to the relationship between the capillary diameter and the water pressure in the Washburn equation, the water pressure in the coal fracture structure around the water injection hole in the coal seam can be calculated.
一种用于确定注水煤层裂隙内部水压力的测试方法，其采用上述的测试装置，包括以下步骤：A test method for determining the internal water pressure of water-injected coal seam cracks, which adopts the above-mentioned test device, comprising the following steps:
a根据煤层注水作业方案，设计密封腔个数及对应进水孔大小，并进行加工，其后待煤层注水钻孔施工完毕后，在注水钻孔周围施工若干水压力测试孔；a According to the coal seam water injection operation plan, design the number of sealed cavities and the size of the corresponding water inlet holes, and process them. After the construction of the coal seam water injection holes is completed, construct several water pressure test holes around the water injection holes;
b、进行煤层注水作业之前，将测试机构与显示机构相连，确定各个密封腔与指示灯的连接顺序，并验证电路可靠性，待验证完成后，使用钻杆将测试机构推入水压力测试孔底部，并进行封孔作业；b. Before the coal seam water injection operation, connect the test mechanism to the display mechanism, determine the connection sequence of each sealing cavity and the indicator light, and verify the reliability of the circuit. After the verification is completed, use the drill pipe to push the test mechanism into the water pressure test hole bottom, and seal the hole;
c、煤层注水作业开始后，不同孔径的进水孔代表不同尺寸的毛细管，通过设置不同孔径的进水孔，以使低压水能够通过较大孔进入低压密封腔内，使高压水通过较小孔进入高压密封腔内；观测显示机构的指示灯，待某一指示灯明亮后，测定相关参数后，根据式(1)所示的washburn方程，利用密封腔进水孔大小计算水压力；c. After the coal seam water injection operation starts, the water inlet holes with different diameters represent capillaries of different sizes. By setting the water inlet holes with different diameters, the low-pressure water can enter the low-pressure sealed cavity through the larger hole, so that the high-pressure water can pass through the smaller hole. The hole enters the high-pressure sealing chamber; observe the indicator light of the display mechanism, after a certain indicator light is bright, after measuring the relevant parameters, according to the Washburn equation shown in formula (1), use the size of the water inlet hole of the sealing chamber to calculate the water pressure;
式(1)中，Pc-孔径r相对应的毛管压力；σ、θ-液体的表面张力和接触角；In formula (1), P c - the capillary pressure corresponding to the aperture r; σ, θ - the surface tension and contact angle of the liquid;
d、待水压力计算完成后，根据计算结果，及时调整注水参数；例如当测试水压力过小时，应该及时增加注水压力等；d. After the water pressure calculation is completed, adjust the water injection parameters in time according to the calculation results; for example, when the test water pressure is too small, the water injection pressure should be increased in time;
e、待水压力测试完成后，回收显示机构，以便进行循环使用。e. After the water pressure test is completed, the display mechanism is recovered for recycling.
本发明中未述及的部分采用或借鉴已有技术即可实现。The parts not mentioned in the present invention can be realized by adopting or learning from the prior art.
尽管本文中较多的使用了诸如R.O滤水膜3、透水钢网4、吸水膨胀橡胶5等术语，但并不排除使用其它术语的可能性。使用这些术语仅仅是为了更方便地描述和解释本发明的本质；把它们解释成任何一种附加的限制都是与本发明精神相违背的。Although the terms such as R.O water filter membrane 3, water-permeable steel mesh 4, water-swellable rubber 5, etc. are used more in this paper, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; it is contrary to the spirit of the present invention to interpret them as any kind of additional limitation.
需要进一步说明的是，本文中所描述的具体实施例仅仅是对本发明的精神所作的举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。It should be further noted that the specific embodiments described herein are merely illustrative for the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.
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