阅读说明：本技术 应用于吸力筒型基础的可回收式沉贯动力装置及其施工方法 (Recyclable penetration power device applied to suction barrel type foundation and construction method thereof ) 是由 甘毅 张金福 胡雪扬 贺正兴 马宇轩 张浦阳 丁红岩 乐丛欢 于 2021-07-27 设计创作，主要内容包括：本发明提供一种应用于吸力筒型基础的可回收式沉贯动力装置及其施工方法,包括底部筒型基础及能与筒型基础磁吸对接固定的沉贯动力装置,筒型基础的顶部具有对接法兰盘,对接法兰盘中部具有环状防水凹槽,环状防水凹槽中部具有环形铁磁体,沉贯动力装置下部具有能扣于对接法兰盘外部的防水外罩,防水外罩内固定有能吸附环形铁磁体的电控吸盘,沉贯动力装置内具有能为吸力筒型基础提供负压及正压的潜水泵,本发明有效利用了电磁吸盘的电控性质,实现了沉贯动力装置的自动回收,可靠性高且便于维护,有效降低了吸力筒型基础安装的施工成本。(The invention provides a recyclable penetration power device applied to a suction cylinder type foundation and a construction method thereof, and the recyclable penetration power device comprises a cylinder type foundation at the bottom and a penetration power device capable of being magnetically attracted and butted and fixed with the cylinder type foundation, wherein a butting flange plate is arranged at the top of the cylinder type foundation, an annular waterproof groove is arranged in the middle of the butting flange plate, an annular ferromagnet is arranged in the middle of the annular waterproof groove, a waterproof outer cover capable of being buckled outside the butting flange plate is arranged at the lower part of the penetration power device, an electric control sucking disc capable of adsorbing the annular ferromagnet is fixed in the waterproof outer cover, and a submersible pump capable of providing negative pressure and positive pressure for the suction cylinder type foundation is arranged in the penetration power device.)

1. The utility model provides a but be applied to suction tube type basic recovery type and sink and pass through power device which characterized in that, inhale the heavy power device that passes through of butt joint fixed including bottom tube type basis and ability and tube type basis magnetism, the top of tube type basis has butt joint ring flange, butt joint ring flange middle part has cyclic annular waterproof recess, cyclic annular waterproof recess middle part has the annular ferromagnet, sink and pass through the power device lower part and have and detain in the outside waterproof dustcoat of butt joint ring flange, waterproof dustcoat internal fixation has the automatically controlled sucking disc that can adsorb the annular ferromagnet, sinks to have in passing through the power device and can provide the immersible pump of negative pressure and malleation for suction tube type basis.

2. The recyclable penetration power device applied to the suction cylinder type foundation is characterized in that the penetration power device comprises a submersible pump positioned on the upper portion and a communication cavity communicated with an inner cavity of the cylinder type foundation below the submersible pump, a low-level communication port is formed in one side of the bottom of the communication cavity and communicated with a vertically extending side wall discharge pipe, a high-level communication port is formed in the middle of the side wall discharge pipe and the top of the communication cavity, a high-level discharge port is formed in the upper end of the side wall discharge pipe, a low-level liquid inlet is further formed between the low-level communication port and the high-level communication port in the communication cavity, and the low-level communication port, the high-level discharge port and the low-level liquid inlet are provided with control valves.

3. The retrievable penetration power device for suction canister type foundation according to claim 2, wherein the electrically controlled suction cup has a waterproof insulating inner block ring and a waterproof insulating outer block ring inserted into the annular waterproof groove and the inner and outer surfaces of the annular ferromagnetic body on the inner and outer sides thereof.

4. The retrievable penetration power device for suction cylinder type foundation according to claim 1, 2 or 3, wherein the waterproof housing further comprises an electric control bolt, the docking flange further comprises a waterproof jack matching with the electric control bolt, the waterproof jack is electrically connected with the control valve so as to transmit power and control signals to the control valve, and the control system comprises a power supply device and a signal processing device.

5. The recyclable penetration power device applied to the suction cylinder type foundation as claimed in claim 1, 2 or 3, wherein a hanging ring is fixed on the top of the penetration power device.

6. The recyclable penetration power device applied to the suction cylinder type foundation according to claim 1, 2 or 3, characterized in that an annular electric control inflation floating ring is fixed on the top of the penetration power device, and the electric control inflation floating ring is connected with an air pump through a pipeline.

7. A construction method using the penetration power device as claimed in claim 4, characterized by comprising the following steps:

(1) before launching the suction barrel type foundation, carrying out magnetic butt joint on an electric control sucker of a penetration power device and a ring-shaped ferromagnet, and after the butt joint is finished, sequentially carrying out waterproof airtight inspection and reliability debugging operation on the power device by using a crane and a control system;

(2) after the suction cylinder type foundation is submerged, the suction cylinder type foundation sequentially contacts the seabed and begins to enter mud by self weight, after self-sinking is finished, the power device is started through the control system to conduct sinking penetration leveling operation on the suction cylinder type foundation, the control system conducts leveling operation in the sinking penetration process by depending on the adjusting pipeline system according to the feedback information of the inclinometer carried by the suction cylinder type foundation, and after the suction cylinder type foundation is sunk in place, the water pump is stopped and the electric control valve of the butt joint structure is sequentially closed.

(3) Before the recovery operation, the power supply of the annular electromagnetic chuck is closed, so that the sinking-penetrating power device can be separated from the connecting structure;

(4) floating the sinking power device, and salvaging and recovering the sinking power device after the sinking power device floats to the water surface;

(5) and (4) repeating the steps (1) to (4) to carry out the penetration sinking operation of the suction cylinder foundation of the next machine position.

8. The recyclable penetration power device applied to the suction cylinder type foundation and the construction method thereof as claimed in claim 7, wherein when the penetration power device in step (1) is butted with the cylinder type foundation, the waterproof insulating inner plugging rings and the waterproof insulating outer plugging rings on the inner side and the outer side of the electric control sucker are inserted into the annular groove to protect the first layer of waterproof insulation of the electric control sucker, the waterproof outer cover of the electric control sucker is tightly attached to the outer edge of the flange of the butting device to protect the second layer of waterproof insulation of the annular electromagnetic sucker, and the electric control bolt in the annular waterproof insulating outer plugging ring can be inserted into the reserved waterproof jack of the butting electric control module in the flange of the butting structure, so that power and control signals are transmitted to the pressure-resistant waterproof electric control valve of the butting structure.

9. The recyclable penetration power device applied to the suction cylinder type foundation and the construction method thereof as claimed in claim 1, wherein in the leveling operation in the step (2), the side wall discharge pipe is provided with an electric control valve A above the high-level communication port, the side wall discharge pipe is provided with an electric control valve B between the high-level communication port and the low-level communication port, the low-level communication port is provided with an electric control valve C, and the low-level liquid inlet port is provided with an electric control valve D;

when the electric control valve A18 and the electric control valve C20 are opened, and the electric control valve B19 and the electric control valve D21 are closed, the submersible pump is used for discharging mud liquid outside the communicating cavity from the high-position discharge port after the mud liquid passes through the inner cavity and enters the side wall discharge pipe through the high-position communicating port, so that negative pressure sinking power is provided for the basis;

when the electric control valves B and D are opened and the electric control valves A and C are closed, a negative pressure pump in the penetration power device feeds liquid from the low-level liquid inlet, enters the side wall discharge pipe through the high-level communication port and is discharged from the low-level communication port at the lower part of the side wall discharge pipe, so that positive pressure upward pulling power is provided for the suction cylinder foundation;

the negative pressure or the positive pressure of the power can be controlled by adjusting the rotating speed of the modified submersible pump.

10. The recyclable penetration power device applied to the suction cylinder type foundation and the construction method thereof as claimed in claim 7 are characterized in that an annular electric control inflation floating ring is fixed at the top of the penetration power device and connected with an air pump through a pipeline, so that the penetration power device can be stably separated from a butt joint structure flange surface, and the damage to the device caused by collision in the separation process is prevented.

Technical Field

The invention relates to a recyclable penetration power device applied to a suction barrel type foundation and a construction method thereof.

Background

With the development and protection of the ocean by human beings, the suction cylinder type foundation has been widely developed as the foundation of the ocean structure in this year.

The suction cylinder type foundation has the advantages of low cost, simple and convenient installation, repeated use and the like. Since the first successful application of a suction cylinder type foundation platform by the oil company of Norwegian countries in 1994, the suction cylinder type foundation is widely used in offshore wind power engineering and ocean platform engineering of Nordic countries, the first suction cylinder type foundation jacket platform CB20B in China is successfully installed, and the suction cylinder type foundation developed by Tianjin university is successfully installed in Jiangsu sea area in 2010, marking the beginning of the application of the suction cylinder type foundation in offshore wind power in China. The suction tube type foundation mainly depends on suction provided by a pump to be sunk and installed, the suction tube type foundation needs to be recovered by manual diving or an underwater robot after sinking and penetrating, the cost is high, the large-scale development of the suction tube type foundation is not facilitated, and therefore the sinking and penetrating power device which is applied to the suction tube type foundation and can realize an automatic recovery function, high in reliability and low in cost is needed.

Disclosure of Invention

The invention improves the problems, namely the technical problems to be solved by the invention are that the force cylinder type foundation is mainly installed by sinking through by the suction provided by the pump, and after the sinking through of the suction cylinder type foundation is finished, the suction cylinder type foundation needs to be recovered by manual diving or an underwater robot, so that the cost is high and the large-scale development of the suction cylinder type foundation is not facilitated.

The specific embodiment of the invention is as follows: the utility model provides a but all kinds of recovery type that are applied to suction cartridge type basis sink and pass through power device, include bottom cartridge type basis and can inhale the fixed power device that passes through that sinks of butt joint with cartridge type basis magnetism, the top on cartridge type basis has butt joint ring flange, butt joint ring flange middle part has cyclic annular waterproof recess, cyclic annular waterproof recess middle part has the ferromagnet, sink and pass through the power device lower part and have and can detain in the outside waterproof dustcoat of butt joint ring flange, waterproof dustcoat internal fixation has the automatically controlled sucking disc that can adsorb the ferromagnet, sinks to have in passing through the power device and can provide the immersible pump of negative pressure and malleation for suction cartridge type basis.

Further, it has control valve including the UNICOM chamber that is located immersible pump and immersible pump below and barrel type basic inner chamber UNICOM on upper portion to sink to run through power device, low level intercommunication mouth has been seted up to UNICOM chamber bottom one side, and low level intercommunication mouth UNICOM has the vertical lateral wall discharge pipe that extends, lateral wall discharge pipe middle part and UNICOM chamber top have high level intercommunication mouth, lateral wall discharge pipe upper end has high level discharge port, and the UNICOM chamber is located and still has low level inlet between low level intercommunication mouth and the high level intercommunication mouth, low level intercommunication mouth, high level discharge port and low level inlet.

Furthermore, the inner side and the outer side of the electric control sucker are provided with a waterproof insulating inner blocking ring and a waterproof insulating outer blocking ring which can be inserted into the inner surface and the outer surface of the annular ferromagnetic body and the annular waterproof groove.

Furthermore, still have automatically controlled bolt in the waterproof dustcoat, have in the butt joint flange dish with automatically controlled bolt complex waterproof jack, waterproof jack electric connection control valve to give control valve with power and control signal transmission.

Furthermore, a hanging ring is fixed on the top of the sinking power device.

Furthermore, an annular electric control inflatable floating ring is fixed at the top of the sinking-penetrating power device and connected with an air pump through a pipeline.

The invention also comprises a construction method by utilizing the sinking penetration power device, which comprises the following steps:

(1) before launching the suction barrel type foundation, carrying out magnetic butt joint on an electric control sucker of a penetration power device and a ring-shaped ferromagnet, and after the butt joint is finished, sequentially carrying out waterproof airtight inspection and reliability debugging operation on the power device by using a crane and a control system;

(2) after the suction cylinder type foundation is submerged, the suction cylinder type foundation sequentially contacts the seabed and begins to enter mud by self weight, after self-sinking is finished, the power device is started through the control system to conduct sinking penetration leveling operation on the suction cylinder type foundation, the control system conducts leveling operation in the sinking penetration process through the adjusting pipeline system according to feedback information of an inclinometer carried by the suction cylinder type foundation, and after the suction cylinder type foundation is sunk in place, the water pump is stopped and an electric control valve of the butt joint structure is sequentially closed.

(3) Before the recovery operation, the power supply of the annular electromagnetic chuck is closed, so that the sinking-penetrating power device can be separated from the connecting structure;

(4) floating the sinking power device, and salvaging and recovering the sinking power device after the sinking power device floats to the water surface;

(5) and (4) repeating the steps (1) to (4) to carry out the penetration sinking operation of the suction cylinder type foundation of the next machine position.

Further, when the power device is connected with the cylindrical foundation in a butt joint mode in the step (1), the waterproof insulating inner blocking ring and the waterproof insulating outer blocking ring on the inner side and the outer side of the electric control sucker are inserted into the annular groove to protect the first layer of waterproof insulation of the electric control sucker, the waterproof outer cover of the electric control sucker is tightly attached to the outer edge of the flange plate of the butt joint device to protect the second layer of waterproof insulation of the annular electromagnetic sucker, and the electric control bolt in the annular waterproof insulating outer blocking ring can be inserted into the butt joint electric control module in the flange plate of the butt joint structure to reserve a waterproof jack, so that a power supply and a control signal are transmitted to the pressure-resistant waterproof electric control valve of the butt joint structure.

Further, in the leveling operation in the step (2), an electric control valve A is arranged above the high-position communicating port of the side wall discharge pipe, an electric control valve B is arranged between the high-position communicating port and the low-position communicating port of the side wall discharge pipe, an electric control valve C is arranged at the low-position communicating port, and an electric control valve D is arranged at the low-position liquid inlet;

when the electric control valve A18 and the electric control valve C20 are opened, and the electric control valve B19 and the electric control valve D21 are closed, the submersible pump is used for discharging mud liquid outside the communicating cavity from the high-position discharge port after the mud liquid passes through the inner cavity and enters the side wall discharge pipe through the high-position communicating port, so that negative pressure sinking power is provided for the basis;

when the electric control valves B and D are opened and the electric control valves A and C are closed, a negative pressure pump in the penetration power device feeds liquid from the low-level liquid inlet, enters the side wall discharge pipe through the high-level communication port and is discharged from the low-level communication port at the lower part of the side wall discharge pipe, so that positive pressure upward pulling power is provided for the suction cylinder foundation;

the negative pressure or the positive pressure of the power can be controlled by adjusting the rotating speed of the modified submersible pump.

Furthermore, an annular electric control inflatable floating ring is fixed at the top of the sinking penetration power device and connected with an air pump through a pipeline, so that the sinking penetration power device can be stably separated from a flange surface of a butt joint structure, and the device is prevented from being damaged by collision in the separation process.

Compared with the prior art, the invention has the following beneficial effects: the invention effectively utilizes the electric control property of the electromagnetic chuck, realizes the automatic recovery of the penetration power device, has high reliability and convenient maintenance, and effectively reduces the construction cost of the installation of the suction cylinder type foundation.

Drawings

FIG. 1 is a general schematic diagram of a penetration power plant provided by the present invention;

FIG. 2 is a schematic view of a docking assembly of the sinking power unit provided by the present invention;

FIG. 3 is a schematic view of a recovery device of the sinking power plant according to the present invention;

FIG. 4 is a schematic cross-sectional view of a suction cup member of the penetration power apparatus according to the present invention;

FIG. 5 is a schematic view of the state of each valve providing negative pressure sinking power for a suction cylinder foundation during leveling operation according to the present invention; ("√ indicates a valve open," × "indicates a valve closed, and arrows indicate water flow);

FIG. 6 is a schematic view of the state of each valve providing positive pressure pull-up power for a suction cylinder foundation during leveling operation according to the present invention; ("√ indicates a valve open," × "indicates a valve closed, and arrows indicate water flow);

in the above figures: 1-a cylindrical foundation, 2-a penetration power device, 3-a control system, 4-a cylindrical foundation bottom, 5-a cylindrical foundation pressure-resistant waterproof electric control valve, 6-a butt flange, 7-an annular waterproof groove, 71-an annular ferromagnet, 8-an electric control module, 9-a sucker member, 10-an adjusting pipeline system, 11-a submersible pump, 12-an electric control inflatable floating ring, 13-an annular electric control sucker, 14-a waterproof insulating inner plugging ring, 15-a waterproof insulating outer plugging ring, 16-a waterproof insulating outer cover, 17-an electric control bolt, 18-an electric control valve A, 19-an electric control valve B, 20-an electric control valve C, 21-an electric control valve D, 22-a side wall discharge pipe, 23-a modular member, 24-a lifting ring and 25-a power supply device, 26-signal receiving device, 27-control panel, 28-control panel.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-4, a recyclable penetration power device applied to a suction cylindrical foundation comprises a bottom cylindrical foundation and a penetration power device 2 which can be magnetically butted and fixed with a cylindrical foundation 1; for control, there is also an operational control system 3 located above the sea surface,

in this embodiment, the top of the cylindrical foundation 1 has a butt flange 6, the middle of the butt flange 6 has an annular waterproof groove 7, the middle of the annular waterproof groove is fixed with an annular ferromagnetic body 71, the lower portion of the penetration power device has a suction cup member 9, the suction cup member 9 includes a waterproof insulating cover 16 that can be fastened outside the butt flange, and an electrically controlled suction cup 13 that can adsorb the annular ferromagnetic body is fixed in the waterproof insulating cover 16.

In order to improve the waterproof performance, the inner side and the outer side of the electric control sucking disc 13 are provided with a waterproof insulating inner blocking ring 14 and a waterproof insulating outer blocking ring 15 which can be inserted into the inner surface and the outer surface of the annular ferromagnetic body and the annular waterproof groove.

When the penetration power device is in butt joint with the cylindrical foundation, the waterproof insulating inner blocking ring and the waterproof insulating outer blocking ring on the inner side and the outer side of the electric control sucker are inserted into the annular groove to protect the first layer of waterproof insulation of the electric control sucker, and the waterproof outer cover of the electric control sucker is tightly attached to the outer edge of the flange plate of the butt joint device to protect the second layer of waterproof insulation of the annular electromagnetic sucker.

The submerged power device comprises a submersible pump 11 located on the upper portion, a communication cavity communicated with a cylindrical basic inner cavity and below the submersible pump, a low-level communication port is formed in one side of the bottom of the communication cavity and communicated with a side wall discharge pipe 22 extending vertically, a high-level communication port is formed in the middle of the side wall discharge pipe and the top of the communication cavity, a high-level discharge port is formed in the upper end of the side wall discharge pipe, a low-level liquid inlet is formed between the low-level communication port and the high-level communication port of the communication cavity, and a control valve is arranged on the low-level communication port, the high-level discharge port and the low-level liquid inlet.

In the implementation process, the adjusting pipeline system 10 is divided into two parts, namely a side wall discharge pipe 22 and a modular component 23, wherein the modular component 23 comprises a connecting structure which is used as a sucking disc component 9 and a submersible pump 11, and the modular component with the corresponding size can be manufactured according to the construction requirement of a suction cylinder type foundation so as to match the type of the submersible pump with the construction requirement. The lower portion of the submersible pump 11 is adapted to interface with a modular component 23, the outlet pipe of which feeds into a side wall drain 22.

When the submersible pump works, the submersible pump generates driving force for discharging liquid from the cavity to the side wall discharge pipe in the communicating cavity.

As shown in fig. 5 to 6, in the leveling operation, an electric control valve a18 is disposed above the high-position communicating port in the side wall discharge pipe, an electric control valve B19 is disposed between the high-position communicating port and the low-position communicating port in the side wall discharge pipe, an electric control valve C20 is disposed at the low-position communicating position, and an electric control valve D21 is disposed at the low-position liquid inlet;

when the electric control valve A18 and the electric control valve C20 are opened, and the electric control valve B19 and the electric control valve D21 are closed, the submersible pump is used for discharging mud liquid outside the communicating cavity from the high-position discharge port after the mud liquid passes through the inner cavity and enters the side wall discharge pipe through the high-position communicating port, so that negative pressure sinking power is provided for the basis;

when the electric control valve B19 and the electric control valve D21 are opened, and the electric control valve A18 and the electric control valve C20 are closed, the negative pressure pump in the submerged power device sucks liquid from the low-position liquid inlet, enters the side wall discharge pipe through the high-position communication port and is discharged from the low-position communication port at the lower part of the side wall discharge pipe, so that positive pressure upward pulling power is provided for the suction cylinder type foundation.

The negative pressure or the positive pressure of the power can be controlled by adjusting the rotating speed of the modified submersible pump.

In order to realize circuit pairing, an electric control bolt 17 is further arranged in the waterproof insulating outer cover 16, a waterproof jack matched with the electric control bolt is arranged in the butt joint flange disc, and the waterproof jack is electrically connected with the control valve, so that a power supply and a control signal are transmitted to the control valve.

The control system 3 is composed of a power supply device 25, a signal receiving device 26 and a control panel 27, and can realize the operation and monitoring of the penetration power device on the control panel 28.

In this embodiment, a hoisting ring 24 is fixed on the top of the penetration power device and is used for hoisting the penetration power device and forming an integral device after the penetration power device is connected with a suction cylinder type foundation.

In this embodiment, an annular electrically controlled inflatable floating ring 12 is fixed on the top of the sinking-penetrating power device, and the electrically controlled inflatable floating ring is connected with an air pump through a pipeline. Before the recovery operation, the power supply of the annular electromagnetic chuck 13 is closed, so that the recovery device 2 can be separated from the connecting structure 1, the electric control inflatable floating ring 12 is opened to be inflated by the air pump to float upwards, and after the electric control inflatable floating ring floats to the water surface, the electric control inflatable floating ring is salvaged and recovered by the hanging cable tied on the hanging ring 24.

The invention also comprises a construction method by utilizing the sinking penetration power device, which comprises the following steps:

(1) before launching the suction barrel type foundation, carrying out magnetic butt joint on an electric control sucker of a penetration power device and a ring-shaped ferromagnet, and after the butt joint is finished, sequentially carrying out waterproof airtight inspection and reliability debugging operation on the power device by using a crane and a control system;

(2) after the suction cylinder type foundation is submerged, the suction cylinder type foundation sequentially contacts the seabed and begins to enter mud by self weight, after self-sinking is finished, the power device is started through the control system to conduct sinking penetration leveling operation on the suction cylinder type foundation, the control system conducts leveling operation in the sinking penetration process through the adjusting pipeline system according to feedback information of an inclinometer carried by the suction cylinder type foundation, and after the suction cylinder type foundation is sunk in place, the water pump is stopped and an electric control valve of the butt joint structure is sequentially closed.

(3) Before the recovery operation, the power supply of the annular electromagnetic chuck is closed, so that the sinking-penetrating power device can be separated from the connecting structure;

(4) floating the sinking power device, and salvaging and recovering the sinking power device after the sinking power device floats to the water surface;

(5) and (4) repeating the steps (1) to (4) to carry out the penetration sinking operation of the suction cylinder type foundation of the next machine position.

In the leveling operation of the step (2), an electric control valve A is arranged above the high-position communicating port of the side wall discharge pipe, an electric control valve B is arranged between the high-position communicating port and the low-position communicating port of the side wall discharge pipe, an electric control valve C is arranged at the low-position communicating position, and an electric control valve D is arranged at the low-position liquid inlet;

when the electric control valve A18 and the electric control valve C20 are opened, and the electric control valve B19 and the electric control valve D21 are closed, the submersible pump is used for discharging mud liquid outside the communicating cavity from the high-position discharge port after the mud liquid passes through the inner cavity and enters the side wall discharge pipe through the high-position communicating port, so that negative pressure sinking power is provided for the basis;

when the electric control valves B and D are opened and the electric control valves A and C are closed, the negative pressure pump in the submerged power device feeds liquid from the low-level liquid inlet, enters the side wall discharge pipe through the high-level communication port and is discharged from the low-level communication port at the lower part of the side wall discharge pipe, so that positive pressure upward pulling power is provided for the suction cylinder foundation.

The negative pressure or the positive pressure of the power can be controlled by adjusting the rotating speed of the modified submersible pump.

An annular electric control inflation floating ring is fixed at the top of the penetration power device and connected with an air pump through a pipeline, so that the penetration power device can be stably separated from a flange surface of a butt joint structure, and the damage to the device caused by collision in the separation process is prevented. The electric control inflatable floating ring can be abandoned after the power device is recovered for the next use

If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.

Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.