CN106948783A - A kind of bottom hole fixing device and utilize the device coal seam setting of casing pumping method - Google Patents
A kind of bottom hole fixing device and utilize the device coal seam setting of casing pumping method Download PDFInfo
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- CN106948783A CN106948783A CN201710317045.5A CN201710317045A CN106948783A CN 106948783 A CN106948783 A CN 106948783A CN 201710317045 A CN201710317045 A CN 201710317045A CN 106948783 A CN106948783 A CN 106948783A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003245 coal Substances 0.000 title claims abstract description 23
- 238000005086 pumping Methods 0.000 title claims 5
- 238000005553 drilling Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 238000005065 mining Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 6
- 239000011435 rock Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
本发明提供一种孔底固定装置以及利用该装置煤层下套管抽采方法，涉及采矿技术领域，包括柱体，柱体的圆周表面上均匀开有若干个条形槽，还包括若干个数量与条形槽相等的固定翼，所述固定翼安装在所述条形槽内，一端转动连接在所述条形槽的底部，另一端的长度可以收进条形槽内，本发明结构设计合理，可以应用于松软煤层下套管后固定住套管，退出钻头时，不会将套管带出。
The invention provides a hole bottom fixing device and a coal seam casing drainage method using the device, which relate to the field of mining technology, including a cylinder, a plurality of bar-shaped grooves are evenly opened on the circumferential surface of the cylinder, and a number of A fixed wing equal to the strip groove, the fixed wing is installed in the strip groove, one end is rotatably connected to the bottom of the strip groove, and the length of the other end can be retracted into the strip groove, the structural design of the present invention Reasonable, it can be applied to fix the casing after the casing is run in the soft coal seam, and the casing will not be taken out when the drill bit is withdrawn.
Description
技术领域technical field
本发明涉及采矿技术领域，具体涉及一种孔底固定装置以及利用该装置煤层下套管抽采方法。The invention relates to the technical field of mining, in particular to a hole bottom fixing device and a coal seam casing drainage method using the device.
背景技术Background technique
随着煤矿生产规模扩大和开采深度不断增加，矿井地质条件越来越复杂。松软煤层、破碎煤层、断层破碎带等地质异常带钻进时，排渣困难，孔壁稳定性差，造成卡钻、埋钻等孔内事故多。快速下管工艺需要，在套管下到孔底后，由于其里端没有生根点，在起钻的过程中，护孔花管易被钻杆带出；必须在起钻过程中，采用人工抵住或再次抵护套管的方法处理，比较繁琐，费时费力。With the expansion of coal mine production scale and the continuous increase of mining depth, the geological conditions of mines are becoming more and more complex. When drilling in geological anomalies such as soft coal seams, broken coal seams, and fault fracture zones, it is difficult to discharge slag, and the stability of the hole wall is poor, resulting in many accidents in the hole such as drill sticking and buried drilling. The rapid pipe running process requires that after the casing is lowered to the bottom of the hole, since there is no rooting point at the inner end, the hole protection flower pipe is easily taken out by the drill pipe during the drilling process; it must be manually The method of resisting or resisting the casing again is cumbersome, time-consuming and labor-intensive.
针对于此，需要做出改进。For this, need to make improvement.
发明内容Contents of the invention
本发明提供了一种孔底固定装置以及利用该装置煤层下套管抽采方法，使用孔底固定装置实现了钻孔到位后能顺利将套管下至孔底，且抽采瓦斯治理安全、高效、节能。The invention provides a hole bottom fixing device and a coal seam casing drainage method using the device. Using the hole bottom fixing device realizes that the casing can be smoothly lowered to the bottom of the hole after the hole is in place, and the gas drainage is safe and efficient. Energy efficient.
一种孔底固定装置，包括柱体，柱体的圆周表面上均匀开有若干个条形槽，还包括若干个数量与条形槽相等的固定翼，所述固定翼安装在所述条形槽内，一端转动连接在所述条形槽的底部，另一端的长度可以收进条形槽内。A fixing device for the bottom of a hole, comprising a cylinder, a plurality of bar-shaped grooves are evenly opened on the circumferential surface of the cylinder, and a number of fixed wings equal to the number of the bar-shaped grooves, the fixed wings are installed on the bar-shaped In the slot, one end is rotatably connected to the bottom of the bar-shaped slot, and the length of the other end can be retracted into the bar-shaped slot.
进一步的，所述条形槽的一端设有安装有转轴，所述固定翼的一端开有轴孔，所述轴孔与转轴配合连接，固定翼一端在条形槽内部转动连接。Further, one end of the strip-shaped groove is provided with a rotating shaft, and one end of the fixed wing is provided with a shaft hole, and the shaft hole is mated with the rotating shaft, and one end of the fixed wing is rotatably connected inside the strip-shaped groove.
进一步的，所述固定翼的一端与扭力弹簧连接，所述扭力弹簧通过销轴连 接在所述条形槽的一端。Further, one end of the fixed wing is connected to a torsion spring, and the torsion spring is connected to one end of the bar-shaped groove through a pin shaft.
进一步的，所述条形槽和固定翼的数量均设有4个。Further, there are four strip grooves and fixed wings.
进一步的，所述柱体的一端还固定连接有一个直径小于所述柱体的第二柱体，所述第二柱体的轴线与柱体的轴线重合，所述固定翼转动连接的一端与半球形结构位于同一侧。Further, one end of the cylinder is also fixedly connected with a second cylinder with a diameter smaller than the cylinder, the axis of the second cylinder coincides with the axis of the cylinder, and one end of the fixed wing is rotatably connected to the The hemispherical structure is on the same side.
进一步的，所述柱体采用PP材料制成。Further, the column is made of PP material.
一种孔底固定装置的煤层下套管抽采方法，采用上述孔底固定装置，包括以下步骤：A coal seam casing drainage method with a hole bottom fixing device, using the above hole bottom fixing device, comprising the following steps:
1)准备设备，包括钻机、钻杆、大通孔开闭式钻头、套管以及孔底固定装置；1) Preparation equipment, including drilling rigs, drill pipes, large through-hole open and close drill bits, casings and hole bottom fixing devices;
2)拧松大通孔开闭式钻头上横梁活动端的螺丝，连接钻杆和钻机进行钻孔；2) Loosen the screw on the movable end of the beam on the open and close drill bit of the large through hole, and connect the drill pipe and the drilling machine for drilling;
3)钻孔至预定的深度后，将钻杆向后撤4-6m，打开大通孔开闭式钻头上的横梁；3) After drilling to the predetermined depth, withdraw the drill pipe 4-6m back, and open the crossbeam on the open and close drill bit of the large through hole;
4)将孔底固定装置连接到套管上，孔底固定装置上固定翼转动连接的一端朝下，将套管和孔底固定装置一起从钻杆顶部往下插入，直到从钻头底部伸出，此时孔底固定装置上的固定翼自动打开，固定在孔底的煤壁上；4) Connect the bottom of the hole fixing device to the casing, and the end of the fixed wing on the bottom of the hole fixing device is facing downward, and insert the casing and the bottom of the hole fixing device together from the top of the drill pipe until it protrudes from the bottom of the drill bit , at this time the fixed wing on the hole bottom fixing device automatically opens and is fixed on the coal wall at the bottom of the hole;
5)最后将钻头移出来。5) Finally remove the drill bit.
进一步的，所述步骤3)中，在钻杆向后撤之前，采用压风排出孔内的煤岩粉。Further, in the step 3), before the drill pipe is withdrawn, the coal and rock powder in the hole is discharged by compressed air.
进一步的，所述钻杆采用肋骨钻杆。Further, the drill rod is a ribbed drill rod.
进一步的，所述大通孔开闭钻头直径96mm，套管直径为1吋。Further, the diameter of the large through-hole opening and closing drill bit is 96 mm, and the diameter of the casing is 1 inch.
本发明的优点在于：本发明结构设计合理，可以用于孔内套管下至孔底后 在起钻后不至把套管拔出，固定翼的结构设计简单使用，通过自动打开可以，抓紧周围的侧壁，保证抓紧力，使用孔底固定装置实现了钻孔到位后能顺利将套管下至孔底。The advantages of the present invention are: the structural design of the present invention is reasonable, and it can be used for the casing in the hole to go down to the bottom of the hole without pulling out the casing after pulling out the drill. The surrounding side walls ensure the gripping force, and the hole bottom fixing device is used to realize that the casing can be smoothly lowered to the bottom of the hole after the hole is drilled in place.
本发明方法的优点在于：通过使用孔底固定装置实现了钻孔到位后能顺利将套管下至孔底，抽采瓦斯治理安全、高效、节能。The method of the present invention has the advantages that: by using the hole bottom fixing device, the casing can be smoothly lowered to the bottom of the hole after the hole is drilled in place, and the gas drainage is safe, efficient and energy-saving.
附图说明Description of drawings
图1为本发明实施例1固定翼收起时的主视结构示意图；Figure 1 is a schematic front view of the fixed wing in Embodiment 1 of the present invention when it is retracted;
图2为本发明实施例1固定翼打开时的主视图；Fig. 2 is the front view when the fixed wing is opened according to Embodiment 1 of the present invention;
图3为图2的左视图；Fig. 3 is the left view of Fig. 2;
图4为本发明实施例2中固定翼与条形槽转动连接结构；Fig. 4 is the rotating connection structure between the fixed wing and the bar-shaped groove in Embodiment 2 of the present invention;
图5为大通孔开闭式钻头的仰视图。Fig. 5 is a bottom view of the large through-hole opening and closing drill bit.
具体实施方式detailed description
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
实施例1Example 1
结合附图1-图3，本发明一种孔底固定装置，包括柱体1，柱体1的圆周表面上均匀开有若干个条形槽2，还包括若干个数量与条形槽2相等的固定翼3，所述固定翼3安装在所述条形槽2内，一端转动连接在所述条形槽2的底部，另一端的长度可以收进条形槽2内。In conjunction with accompanying drawings 1-3, a hole bottom fixing device of the present invention includes a cylinder 1, a plurality of bar-shaped grooves 2 are evenly opened on the circumferential surface of the cylinder 1, and several strip-shaped grooves 2 equal in number are also included. The fixed wing 3 is installed in the strip groove 2, one end is rotatably connected to the bottom of the strip groove 2, and the length of the other end can be received in the strip groove 2.
进一步的，所述条形槽2的一端设有安装有转轴4，所述固定翼3的一端开有轴孔，所述轴孔与转轴配合连接，固定翼3一端在条形槽2内部转动连接，这里通过固定翼3自身的重力实现固定翼3的打开；Further, one end of the strip groove 2 is provided with a rotating shaft 4, and one end of the fixed wing 3 has a shaft hole, and the shaft hole is connected with the rotating shaft, and one end of the fixed wing 3 rotates inside the strip groove 2 Connect, realize the opening of fixed wing 3 by the gravity of fixed wing 3 self here;
进一步的，所述条形槽2和固定翼3的数量均设有4个。Further, there are four strip grooves 2 and four fixed wings 3 .
进一步的，所述柱体1的一端还固定连接有一个直径小于所述柱体1的第二柱体7，第二柱体7用于下套管时插入套管与套管连接，所述第二柱体7的轴线与柱体1的轴线重合，所述柱体1和第二柱体7外端均设置成半球形的圆滑结构。Further, one end of the cylinder 1 is also fixedly connected with a second cylinder 7 with a diameter smaller than that of the cylinder 1, the second cylinder 7 is used to insert the sleeve and connect with the sleeve when the sleeve is lowered, the The axis of the second cylinder 7 coincides with the axis of the cylinder 1, and the outer ends of the cylinder 1 and the second cylinder 7 are both arranged in a hemispherical smooth structure.
进一步的，所述柱体1采用PP材料制成，强度高，耐高温。Further, the column 1 is made of PP material, which has high strength and high temperature resistance.
一种孔底固定装置的煤层下套管抽采方法，采用上述孔底固定装置，包括以下步骤：A coal seam casing drainage method with a hole bottom fixing device, using the above hole bottom fixing device, comprising the following steps:
1)准备设备，包括钻机、钻杆、大通孔开闭式钻头、套管以及孔底固定装置；如图5所示，大通孔开闭式钻头横梁一端用铰链固定(图中A处)，一端可自由开启，在正常钻进过程中，钻头中间的横梁闭合，钻头能全面破碎煤层，待钻孔施工到位后，人工将套管推移至钻头底部后将横梁打开，使套管顺利下入孔底；1) Preparation equipment, including drilling rig, drill pipe, large through-hole open and close drill, casing and hole bottom fixing device; as shown in Figure 5, one end of the large through-hole open and close drill beam is fixed with a hinge (A in the figure), One end can be opened freely. During the normal drilling process, the beam in the middle of the drill bit is closed, and the drill bit can completely break the coal seam. After the drilling is in place, manually push the casing to the bottom of the drill bit and open the beam to make the casing run smoothly. hole bottom;
2)拧松大通孔开闭式钻头上横梁活动端的螺丝，连接钻杆和钻机进行钻孔；2) Loosen the screw on the movable end of the beam on the open and close drill bit of the large through hole, and connect the drill pipe and the drilling machine for drilling;
3)钻孔至预定的深度后，将钻杆向后撤4-6m，打开大通孔开闭式钻头上的横梁；3) After drilling to the predetermined depth, withdraw the drill pipe 4-6m back, and open the crossbeam on the open and close drill bit of the large through hole;
4)将孔底固定装置连接到套管上，孔底固定装置上固定翼转动连接的一端朝下，将套管和孔底固定装置一起从钻杆顶部往下插入，直到从钻头底部伸出， 此时孔底固定装置上的固定翼自动打开，固定在孔底的煤壁上；4) Connect the bottom of the hole fixing device to the casing, and the end of the fixed wing on the bottom of the hole fixing device is facing downward, and insert the casing and the bottom of the hole fixing device together from the top of the drill pipe until it protrudes from the bottom of the drill bit At this time, the fixed wing on the hole bottom fixing device automatically opens and is fixed on the coal wall at the bottom of the hole;
5)最后将钻头移出来。5) Finally remove the drill bit.
进一步的，所述步骤3)中，在钻杆向后撤之前，采用压风排出孔内的煤岩粉。Further, in the step 3), before the drill pipe is withdrawn, the coal and rock powder in the hole is discharged by compressed air.
进一步的，所述钻杆采用肋骨钻杆，这种类型的钻杆内径较大，可以放入1吋套管。Further, the drill rod adopts a ribbed drill rod. This type of drill rod has a relatively large inner diameter and can be put into a 1-inch casing.
进一步的，所述大通孔开闭钻头直径96mm，套管直径为1吋。Further, the diameter of the large through-hole opening and closing drill bit is 96 mm, and the diameter of the casing is 1 inch.
实施例2Example 2
结合附图1-图4，本发明一种孔底固定装置，包括柱体1，柱体1的圆周表面上均匀开有若干个条形槽2，还包括若干个数量与条形槽2相等的固定翼3，所述固定翼3安装在所述条形槽2内，一端转动连接在所述条形槽2的底部，另一端的长度可以收进条形槽2内。In conjunction with accompanying drawings 1 to 4, a hole bottom fixing device of the present invention includes a cylinder 1, a plurality of bar-shaped grooves 2 are evenly opened on the circumferential surface of the cylinder 1, and several strip-shaped grooves 2 equal in number are also included. The fixed wing 3 is installed in the strip groove 2, one end is rotatably connected to the bottom of the strip groove 2, and the length of the other end can be received in the strip groove 2.
进一步的，所述固定翼3的一端与扭力弹簧5连接，所述扭力弹簧5通过销轴6连接在所述条形槽2的一端，通过扭力弹簧5的作用实现固定翼3的常开；Further, one end of the fixed wing 3 is connected to the torsion spring 5, and the torsion spring 5 is connected to one end of the strip groove 2 through the pin shaft 6, and the fixed wing 3 is normally opened by the action of the torsion spring 5;
进一步的，所述条形槽2和固定翼3的数量均设有4个。Further, there are four strip grooves 2 and four fixed wings 3 .
进一步的，所述柱体1的一端还固定连接有一个直径小于所述柱体1的第二柱体7，第二柱体7用于下套管时插入套管与套管连接，所述第二柱体7的轴线与柱体1的轴线重合，所述柱体1和第二柱体7外端均设置成半球形的圆滑结构。Further, one end of the cylinder 1 is also fixedly connected with a second cylinder 7 with a diameter smaller than that of the cylinder 1, the second cylinder 7 is used to insert the sleeve and connect with the sleeve when the sleeve is lowered, the The axis of the second cylinder 7 coincides with the axis of the cylinder 1, and the outer ends of the cylinder 1 and the second cylinder 7 are both arranged in a hemispherical smooth structure.
进一步的，所述柱体1采用PP材料制成，强度高，耐高温。Further, the column 1 is made of PP material, which has high strength and high temperature resistance.
一种孔底固定装置的煤层下套管抽采方法，采用上述孔底固定装置，包括以下步骤：A coal seam casing drainage method with a hole bottom fixing device, using the above hole bottom fixing device, comprising the following steps:
1)准备设备，包括钻机、钻杆、大通孔开闭式钻头、套管以及孔底固定装置；1) Preparation equipment, including drilling rigs, drill pipes, large through-hole open and close drill bits, casings and hole bottom fixing devices;
2)拧松大通孔开闭式钻头上横梁活动端的螺丝，连接钻杆和钻机进行钻孔；2) Loosen the screw on the movable end of the beam on the open and close drill bit of the large through hole, and connect the drill pipe and the drilling machine for drilling;
3)钻孔至预定的深度后，将钻杆向后撤4-6m，打开大通孔开闭式钻头上的横梁；3) After drilling to the predetermined depth, withdraw the drill pipe 4-6m back, and open the crossbeam on the open and close drill bit of the large through hole;
4)将孔底固定装置连接到套管上，孔底固定装置上固定翼转动连接的一端朝下，将套管和孔底固定装置一起从钻杆顶部往下插入，直到从钻头底部伸出，此时孔底固定装置上的固定翼自动打开，固定在孔底的煤壁上；4) Connect the bottom of the hole fixing device to the casing, and the end of the fixed wing on the bottom of the hole fixing device is facing downward, and insert the casing and the bottom of the hole fixing device together from the top of the drill pipe until it protrudes from the bottom of the drill bit , at this time the fixed wing on the hole bottom fixing device automatically opens and is fixed on the coal wall at the bottom of the hole;
5)最后将钻头移出来。5) Finally remove the drill bit.
进一步的，所述步骤3)中，在钻杆向后撤之前，采用压风排出孔内的煤岩粉。Further, in the step 3), before the drill pipe is withdrawn, the coal and rock powder in the hole is discharged by compressed air.
进一步的，所述钻杆采用肋骨钻杆，这种类型的钻杆内径较大，可以放入1吋套管。Further, the drill rod adopts a ribbed drill rod. This type of drill rod has a relatively large inner diameter and can be put into a 1-inch casing.
进一步的，所述大通孔开闭钻头直径96mm，套管直径为1吋。Further, the diameter of the large through-hole opening and closing drill bit is 96 mm, and the diameter of the casing is 1 inch.
本发明的优点在于：本发明结构设计合理，可以用于孔内套管下至孔底后在起钻后不至把套管拔出，固定翼的结构设计简单使用，通过自动打开可以，抓紧周围的侧壁，保证抓紧力，使用孔底固定装置实现了钻孔到位后能顺利将套管下至孔底。The advantages of the present invention are: the structural design of the present invention is reasonable, and it can be used for the casing in the hole to go down to the bottom of the hole without pulling out the casing after pulling out the drill. The surrounding side walls ensure the gripping force, and the hole bottom fixing device is used to realize that the casing can be smoothly lowered to the bottom of the hole after the hole is drilled in place.
本发明方法的优点在于：通过使用孔底固定装置实现了钻孔到位后能顺利将套管下至孔底，抽采瓦斯治理安全、高效、节能。The method of the present invention has the advantages that: by using the hole bottom fixing device, the casing can be smoothly lowered to the bottom of the hole after the hole is drilled in place, and the gas drainage is safe, efficient and energy-saving.
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. any such actual relationship or order exists between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.
以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications are made to the recorded technical solutions, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
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