阅读说明：本技术 一种核电厂人员闸门传动系统 (personnel gate transmission system of nuclear power plant ) 是由 钦军伟 陈曌 张峰 谢洪虎 李越 于 2019-08-12 设计创作，主要内容包括：本发明公开了一种核电厂人员闸门传动系统,包括具有容纳空间的中间传动箱,所述容纳空间内可活动地设置有多层传动组件且所述多层传动组件可拆卸地与所述中间传动箱连接；每一传动组件之间通过齿轮传动,所述多层传动组件用于提供驱动力,根据所述驱动力驱动压力平衡和密封门机构,并通过机械联锁方式实现密封门机构的开启。本发明将传动组件集成到中间传动箱后,对箱体进行模块化设计,并将中间传动箱的安装与传动组件解耦,实现人员闸门安装后运行需要时,再安装中间传动箱,免除了电站现场安装和调试维修期间的保养要求,且箱体内设备便于维修和更换。(The invention discloses a personnel gate transmission system of a nuclear power plant, which comprises an intermediate transmission case with an accommodating space, wherein a plurality of layers of transmission assemblies are movably arranged in the accommodating space and detachably connected with the intermediate transmission case; each transmission assembly is in gear transmission, the multi-layer transmission assemblies are used for providing driving force, driving the pressure balance and the sealing door mechanism according to the driving force, and the sealing door mechanism is opened in a mechanical interlocking mode. According to the invention, after the transmission assembly is integrated into the intermediate transmission case, the modular design is carried out on the case body, and the installation of the intermediate transmission case is decoupled from the transmission assembly, so that the intermediate transmission case is installed when the operation of the personnel gate is required after the installation, the maintenance requirements during the field installation, debugging and maintenance of the power station are avoided, and the equipment in the case body is convenient to maintain and replace.)

1. A personnel lock transmission system of a nuclear power plant is characterized by comprising an intermediate transmission case (100) with a containing space, wherein a multi-layer transmission assembly (200) is movably arranged in the containing space, and the multi-layer transmission assembly (200) is detachably connected with the intermediate transmission case (100);

Each transmission assembly (200) is in gear transmission, the multi-layer transmission assemblies (200) are used for providing driving force, driving the pressure balance and sealing door mechanism according to the driving force, and opening of the sealing door mechanism is achieved in a mechanical interlocking mode.

2. The nuclear power plant personnel gate drive system of claim 1, wherein the multi-layer drive assembly (200) comprises: a power source module (210), a drive and pressure balancing module (220), and an interlock mechanism module (230);

The power source module (210) is arranged at the bottom of the intermediate transmission case (100) and used for manually or electrically generating driving force;

The input end of the driving and pressure balancing module (220) is connected with the power source module (210), the output end of the driving and pressure balancing module is respectively connected with the pressure balancing mechanism, the sealing door mechanism and the interlocking mechanism module (230), and the driving and pressure balancing module is used for transmitting the driving force to the pressure balancing mechanism and the sealing door mechanism so as to realize the opening and closing of the sealing door and the operation of the pressure balancing mechanism; also for transmitting the driving force to the interlocking mechanism module (230);

The interlocking mechanism module (230) is arranged at the top of the intermediate transmission case (100) and is used for controlling the opening of the sealing door mechanism on one side or two sides according to the driving force;

Be provided with in the accommodation space and fix first coupling assembling (310) of middle transmission case (100) bottom and fix second coupling assembling (320) and third coupling assembling (330) of middle transmission case (100) lateral wall, first coupling assembling (310), second coupling assembling (320) and third coupling assembling (330) correspond respectively with power source module (210), drive and pressure balance module (220) and interlocking device module (230) can dismantle the connection.

3. the nuclear power plant personnel gate drive system of claim 2, wherein the power source module (210) comprises: a motor (211), a speed reducer (212) connected with the output end of the motor (211), a first input shaft (213) and a second input shaft (214) connected to an output end of the speed reducer (212), a first output shaft (215) and a second output shaft (216) corresponding to the first input shaft (213) and the second input shaft (214), a first clutch (217) installed between the first input shaft (213) and the first output shaft (215), and a second clutch (218) installed between the second input shaft (214) and the second output shaft (216), the first input shaft (213) and the second input shaft (214) drive the corresponding first output shaft (215) and second output shaft (216) to output driving force through the first clutch (217) and the second clutch (218) or are separated from the first output shaft (215) and the second output shaft (216).

4. The nuclear power plant personnel airlock transmission system of claim 3 wherein the first connection assembly (310) comprises a first support plate (311), a second support plate (312), a fourth support plate (314), a fifth support plate (315), a first bearing seat (321), a second bearing seat (322), a third bearing seat (323), and a fourth bearing seat (324) fixedly connected to the bottom of the intermediate transmission box (100), and a third support plate (313) fixedly connected to the side wall of the intermediate transmission box (100); the motor (211) is detachably connected with the bottom of the intermediate transmission case (100) through a third supporting plate (313), a fourth supporting plate (314) and a fifth supporting plate (315); the speed reducer (212) is detachably connected with the side wall of the intermediate transmission case (100) through a third supporting plate (313); the first clutch (217) and the second clutch (218) are detachably connected with the bottom of the intermediate transmission case (100) through a first supporting plate (311) and a second supporting plate (312) respectively; the first output shaft (215) is provided with a first bearing (331) and a second bearing (332), and the first bearing (331) and the second bearing (332) are detachably connected with the intermediate transmission case (100) through a corresponding first bearing seat (321) and a corresponding second bearing seat (322); the second output shaft (215) is provided with a third bearing (333) and a fourth bearing (334), and the third bearing (333) and the fourth bearing (334) are detachably connected with the intermediate transmission case (100) through a corresponding third bearing seat (323) and a corresponding fourth bearing seat (324).

5. The nuclear power plant personnel gate drive system of claim 4, wherein the power source module (210) further comprises: and the first driving gear (219) and the second driving gear (2110) are correspondingly sleeved on the first output shaft (215) and the second output shaft (216) and are used for transmitting the driving force generated by the motor (211) to the driving and pressure balancing module (220).

6. The nuclear power plant personnel gate drive system of claim 5, wherein the power source module (210) further comprises: a first manual shaft (2111), a second manual shaft (2119), a first manual shaft driven gear (2112) correspondingly connected with the first manual shaft (2111), a first manual shaft driving gear (2113) engaged with the first manual shaft driven gear (2112), the first manual shaft driving gear (2113) is sleeved on the third input shaft (2114), a first steering gear (2115) and a third clutch (2117) are further sleeved on the third input shaft (2114), a second steering gear (2116) and a fourth clutch (2118) are sleeved on the second manual shaft (2119), the third input shaft (2114) and the second manual shaft (2119) drive the corresponding first output shaft (215) and second output shaft (216) to output driving force through the third clutch (2117) and the fourth clutch (2118) or are separated from the first output shaft (215) and the second output shaft (216); the first connection assembly (310) further comprises: with middle transmission case (100)'s bottom fixed connection's first manual bearing frame (3213), be provided with first manual bearing (3313) on first manual shaft (2111), first manual bearing (3313) through first manual bearing frame (3213) with middle transmission case (100) can dismantle the connection.

7. The nuclear power plant personnel gate drive system of claim 2, wherein the drive and pressure equalization module (220) comprises: the driving mechanism comprises a fifth input shaft (221), a sixth input shaft (222), a first driven gear (223), a first interlocking driving gear (225) and a first pressure driving gear (227), wherein the first driven gear, the first interlocking driving gear and the first pressure driving gear are sleeved on the fifth input shaft (221); a second driven gear (224), a second interlocking driving gear (226) and a second pressure driving gear (228) which are sleeved on the sixth input shaft (222); the first driven gear (223) and the second driven gear (224) are meshed with the first driving gear (219) and the second driving gear (2110), and one ends of the fifth input shaft (221) and the sixth input shaft (222) are respectively and correspondingly connected with the first sealing door and the second sealing door for driving the sealing doors to open and close; the first interlock driving gear (225) and the second interlock driving gear (226) are used to transmit a driving force to the interlock mechanism module (230).

8. The nuclear power plant personnel gate drive system of claim 7, wherein the drive and pressure equalization module (220) further comprises: the driving device comprises a first pressure balance shaft (229) and a second pressure balance shaft (2210), wherein a first pressure driven gear (2211) is sleeved on the first pressure balance shaft (229), the first pressure driven gear (2211) is meshed with the first pressure driving gear (227) and used for transmitting the driving force to the first pressure balance shaft (229), a second pressure driven gear (2212) is sleeved on the second pressure balance shaft (2210), the second pressure driven gear (2212) is meshed with the second pressure driving gear (228) and used for transmitting the driving force to the second pressure balance shaft (2210), and one end of the first pressure balance shaft (229) and one end of the second pressure balance shaft (2210) are connected with a pressure balance mechanism which is used for driving the pressure balance mechanism to open and close under the action of the driving force.

9. The nuclear power plant personnel gate drive system of claim 8, wherein the second connection assembly (320) comprises: the fifth input shaft (221) is provided with a fifth bearing (335) and a sixth bearing (336), the fifth bearing (335) and the sixth bearing (336) which are detachably connected with the middle transmission case (100) through the corresponding fifth bearing seat (325) and the corresponding sixth bearing seat (326); a seventh bearing (337) and an eighth bearing (338) are arranged on the sixth input shaft (222), and the seventh bearing (337) and the eighth bearing (338) are detachably connected with the intermediate transmission case (100) through a corresponding seventh bearing seat (327) and a corresponding eighth bearing seat (328); a ninth bearing (339) and a tenth bearing (3310) are arranged on the first pressure balance shaft (229), and the ninth bearing (339) and the tenth bearing (3310) are detachably connected with the intermediate transmission case (100) through a corresponding ninth bearing seat (329) and a corresponding tenth bearing seat (3210) respectively; an eleventh bearing (3311) and a twelfth bearing (3312) are arranged on the second pressure balance shaft (2210), and the eleventh bearing (3311) and the twelfth bearing (3312) are detachably connected with the intermediate transmission case (100) through corresponding eleventh bearing seats (3211) and twelfth bearing seats (3212) respectively.

10. The nuclear power plant personnel gate drive system of claim 9, wherein the drive and pressure equalization module (220) further comprises: the first safety clutch (2213) sleeved on the fifth input shaft (221) and the second safety clutch (2214) sleeved on the sixth input shaft (222) are arranged, the first safety clutch (2213) is arranged between the first interlocking driving gear (225) and the first driven gear (223), and the second safety clutch (2214) is arranged between the second interlocking driving gear (226) and the second driven gear (224) for realizing overload protection.

11. The nuclear power plant personnel gate drive system of claim 2, wherein the interlock mechanism module (230) comprises: a first interlocking output shaft (231), a second interlocking output shaft (232), and a first interlocking driven gear (233) and a second interlocking driven gear (234) correspondingly sleeved at one end of the first interlocking output shaft (231) and the second interlocking output shaft (232), wherein the first interlocking driven gear (233) and the second interlocking driven gear (234) are respectively engaged with the second interlocking driving gear (226) and the first interlocking driving gear (225) for transmitting the driving force to the first interlocking output shaft (231) and the second interlocking output shaft (232), and the third connecting assembly (330) comprises: a fourteenth bearing seat (3214), a fifteenth bearing seat (3215), a sixteenth bearing seat (3216), and a seventeenth bearing seat (3217) fixedly connected to the side wall of the intermediate transmission case (100), wherein the first interlocking output shaft (231) is provided with a fourteenth bearing (3314) and a fifteenth bearing (3315), and the fourteenth bearing (3314) and the fifteenth bearing (3315) are detachably connected to the intermediate transmission case (100) through the corresponding fourteenth bearing seat (3214) and the fifteenth bearing seat (3215), respectively; and a sixteenth bearing (3316) and a seventeenth bearing (3317) are arranged on the second coupling output shaft (232), and the sixteenth bearing (3316) and the seventeenth bearing (3317) are detachably connected with the intermediate transmission case (100) through a corresponding sixteenth bearing seat (3216) and a corresponding seventeenth bearing seat (3217) respectively.

12. The nuclear power plant personnel gate drive system of claim 11, wherein the interlock mechanism module (230) further comprises: the interlocking unit (235), interlocking unit (235) are connected first interlocking output shaft (231) and second interlocking output shaft (232), interlocking unit (235) are including setting up first spline (2351) on first interlocking output shaft (231) sets up second spline (2352) on the second interlocking output shaft (232), interlocking unit (235) still include spanner (2353), spanner (2353) are connected respectively first spline (2351) and second spline (2352) are used for the drive the disconnection or the combination of first spline (2351) and second spline (2352), realize that the unilateral of sealing door is opened or two-sided is opened.

Technical Field

The invention relates to the field of nuclear power, in particular to a personnel gate transmission system of a nuclear power plant.

Background

the main function of the personnel lock is to allow personnel and small equipment to pass through when the reactor is operated or the reactor is shut down due to heat, and the sealing function of the containment vessel is not damaged. In special cases, the following functions are also provided: under the accident condition, the emergency evacuation exit is used as an exit for emergency evacuation of personnel; when cold shutdown is performed, the lock of the gate is released, and the two gates are opened simultaneously and can be used as passages for personnel and small equipment to enter and exit the containment vessel; when the containment is subjected to sealing and strength tests, the containment is used as a pressurization/decompression chamber. The personnel gate structure comprises a cylinder body, a sealing door (an inner door and an outer door), a channel bottom plate and the like, and comprises a transmission mechanism, an interlocking mechanism, a pressure balance mechanism, a locking mechanism, an outer door hinge mechanism, an inner door hinge mechanism, other accessory mechanisms and the like for driving the structures, so that the established function of the personnel gate is realized together.

Disclosure of Invention

In order to solve the technical problem that a personnel gate transmission structure in the prior art does not meet the integrated and modularized design requirement of a personnel gate, the invention provides a personnel gate transmission system of a nuclear power plant, which comprises a middle transmission box with an accommodating space, wherein a plurality of layers of transmission components are movably arranged in the accommodating space and are detachably connected with the middle transmission box; all through gear drive between each transmission subassembly, multilayer transmission subassembly is used for providing drive power, according to drive power drive pressure balance and sealing door mechanism to realize opening of sealing door mechanism through mechanical interlocking mode.

In the aforementioned transmission system for a personnel lock of a nuclear power plant, the transmission assembly includes: the interlocking device comprises a power source module, a driving and pressure balancing module and an interlocking mechanism module; the power source module is arranged at the bottom of the middle transmission case and used for manually or electrically generating driving force; the input end of the driving and pressure balancing module is connected with the power source module, and the output end of the driving and pressure balancing module is respectively connected with the pressure balancing mechanism, the sealing door mechanism and the interlocking mechanism module and is used for transmitting the driving force to the pressure balancing mechanism and the sealing door mechanism so as to realize the opening and closing of the sealing door and the operation of the pressure balancing mechanism; also for transmitting the driving force to the interlocking mechanism module; the interlocking mechanism module is arranged at the top of the intermediate transmission case and used for controlling the unilateral or bilateral opening of the sealing door mechanism according to the driving force, a first connecting assembly arranged at the bottom of the intermediate transmission case and a second connecting assembly and a third connecting assembly arranged on the side wall of the intermediate transmission case are arranged in the accommodating space and fixed, and the first connecting assembly, the second connecting assembly and the third connecting assembly respectively correspond to and are detachably connected with the power source module, the driving and pressure balancing module and the interlocking mechanism module.

In the aforementioned transmission system for a personnel gate of a nuclear power plant, the power source module includes: the driving device comprises a motor, a speed reducer connected with the output end of the motor, a first input shaft and a second input shaft connected with the output end of the speed reducer, a first output shaft and a second output shaft corresponding to the first input shaft and the second input shaft, a first clutch installed between the first input shaft and the first output shaft, and a second clutch installed between the second input shaft and the second output shaft, wherein the first input shaft and the second input shaft drive the corresponding first output shaft and second output shaft to output driving force or are separated from the first output shaft and the second output shaft through the first clutch and the second clutch.

In the transmission system of the personnel gate of the nuclear power plant, the first connecting component comprises a first supporting plate, a second supporting plate, a fourth supporting plate, a fifth supporting plate, a first bearing seat, a second bearing seat, a third bearing seat and a fourth bearing seat which are fixedly connected with the bottom of the middle transmission box, and a third supporting plate which is fixedly connected with the side wall of the middle transmission box; the motor is detachably connected with the bottom of the middle transmission case through a third support plate, a fourth support plate and a fifth support plate; the speed reducer is detachably connected with the side wall of the middle transmission case through a third support plate; the first clutch and the second clutch are detachably connected with the bottom of the intermediate transmission case through a first supporting plate and a second supporting plate respectively; the first output shaft is provided with a first bearing and a second bearing, and the first bearing and the second bearing are detachably connected with the intermediate transmission case through a corresponding first bearing seat and a corresponding second bearing seat respectively; and a third bearing and a fourth bearing are arranged on the second output shaft, and the third bearing and the fourth bearing are detachably connected with the intermediate transmission case through a corresponding third bearing seat and a corresponding fourth bearing seat respectively.

In the aforementioned transmission system for a personnel gate of a nuclear power plant, the power source module further includes: and the first driving gear and the second driving gear are correspondingly sleeved on the first output shaft and the second output shaft and are used for conveying the driving force generated by the motor to the driving and pressure balancing module.

In the aforementioned transmission system for a personnel gate of a nuclear power plant, the power source module further includes: first manual shaft, the manual shaft of second, correspond with first manual shaft driven gear that first manual shaft is connected, with the first manual shaft driving gear of first manual shaft driven gear meshing, first manual shaft driving gear cover is established on the third input shaft, still overlap on the third input shaft and be equipped with first steering gear and third clutch, the cover is equipped with second steering gear and fourth clutch on the manual shaft of second, third input shaft, the manual shaft of second pass through third clutch and fourth clutch drive and correspond first output shaft and second output shaft output drive power or with first output shaft and second output shaft break away from, first coupling assembly still includes: with the first manual bearing frame of the bottom fixed connection of middle transmission case, be provided with first manual bearing on the first manual axis, first manual bearing through first manual bearing frame with middle transmission case can dismantle the connection.

In the above transmission system for a personnel gate of a nuclear power plant, the driving and pressure balancing module includes: the first driven gear, the first interlocking driving gear and the first pressure driving gear are sleeved on the fifth input shaft; the second driven gear, the second interlocking driving gear and the second pressure driving gear are sleeved on the sixth input shaft; the first driven gear and the second driven gear are meshed with the first driving gear and the second driving gear, and one end of the fifth input shaft and one end of the sixth input shaft are connected with the first sealing door and the second sealing door and are used for driving the sealing doors to open and close; the first and second interlock driving gears are used to transmit a driving force to the interlock mechanism module.

in the above transmission system for a personnel gate of a nuclear power plant, the driving and pressure balancing module further includes: the driving device comprises a first pressure balance shaft and a second pressure balance shaft, wherein a first pressure driven gear is sleeved on the first pressure balance shaft, the first pressure driven gear is meshed with a first pressure driving gear and used for transmitting driving force to the first pressure balance shaft, the second pressure driven gear is meshed with a second pressure driving gear and used for transmitting the driving force to the second pressure balance shaft, and one end of the first pressure balance shaft and one end of the second pressure balance shaft are connected with a pressure balance mechanism and used for driving the pressure balance mechanism to open and close under the action of the driving force.

In the above-mentioned transmission system of the personnel lock of the nuclear power plant, the second connecting component includes: the fifth input shaft is provided with a fifth bearing and a sixth bearing, and the fifth bearing and the sixth bearing are detachably connected with the intermediate transmission case through the corresponding fifth bearing seat and the corresponding sixth bearing seat respectively; a seventh bearing and an eighth bearing are arranged on the sixth input shaft, and the seventh bearing and the eighth bearing are detachably connected with the intermediate transmission case through a corresponding seventh bearing seat and a corresponding eighth bearing seat respectively; a ninth bearing and a tenth bearing are arranged on the first pressure balance shaft, and the ninth bearing and the tenth bearing are detachably connected with the intermediate transmission case through corresponding ninth bearing seats and tenth bearing seats respectively; and an eleventh bearing and a twelfth bearing are arranged on the second pressure balance shaft, and the eleventh bearing and the twelfth bearing are detachably connected with the intermediate transmission case through corresponding eleventh bearing seats and twelfth bearing seats respectively.

In the above transmission system for a personnel gate of a nuclear power plant, the driving and pressure balancing module further includes: the first safety clutch is arranged between the first interlocking driving gear and the first driven gear, and the second safety clutch is arranged between the second interlocking driving gear and the second driven gear and used for realizing overload protection.

In the above transmission system of the personnel lock gate of the nuclear power plant, the interlocking mechanism module includes: first interlock output shaft, second interlock output shaft and correspond the cover and establish first interlock driven gear and second interlock driven gear of first interlock output shaft, second interlock output shaft one end, first interlock driven gear and second interlock driven gear with first interlock driving gear and second interlock driving gear meshing for with drive power transmission to first interlock output shaft and second interlock output shaft, third coupling assembling includes: the first interlocking output shaft is provided with a fourteenth bearing and a fifteenth bearing, and the fourteenth bearing and the fifteenth bearing are detachably connected with the intermediate transmission case through the corresponding fourteenth bearing seat and the corresponding fifteenth bearing seat respectively; and a sixteenth bearing and a seventeenth bearing are arranged on the second interlocking output shaft, and the sixteenth bearing and the seventeenth bearing are detachably connected with the intermediate transmission case through a sixteenth bearing seat and a seventeenth bearing seat which correspond to each other respectively.

In the above transmission system of the personnel lock gate of the nuclear power plant, the interlocking mechanism module further includes: the interlocking unit is connected with the first interlocking output shaft and the second interlocking output shaft, the interlocking unit comprises a first spline arranged on the first interlocking output shaft and a second spline arranged on the second interlocking output shaft, the interlocking unit further comprises a spanner, and the spanner is connected with the first spline and the second spline respectively and used for driving the first spline and the second spline to be disconnected or combined to realize the unilateral opening or bilateral opening of the sealing door.

The technical scheme provided by the embodiment of the invention has the following beneficial effects: according to the personnel gate transmission system of the nuclear power plant, the transmission assembly is placed in the middle transmission box, the middle transmission box is in a modular design, and the middle transmission box and the support assembly are in a detachable design, so that the subsequent integral installation and integral detachment are facilitated; by replacing chain wheel and chain transmission in the prior art with gear transmission, the overall dimensions of a personnel gate transmission system of a nuclear power plant and the power transmission parts of other mechanisms are reduced; and gear drive compares in sprocket chain drive more accurate, has increased transmission system's rigidity simultaneously, has solved the elasticity return stroke problem in the sprocket chain drive process, simultaneously, with the encapsulation of drive assembly part in middle transmission case, prevent its damage, improved transmission system's life, reduced the long-term maintenance requirement of nuclear power plant personnel gate transmission system during nuclear power station construction installation and debugging.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a transmission system of a personnel lock of a nuclear power plant according to an embodiment of the present invention;

FIG. 2 is a two-dimensional diagram of a transmission system structure of a personnel lock of a nuclear power plant according to an embodiment of the present invention; '

FIG. 3 is a three-dimensional schematic illustration of a nuclear power plant personnel lock drive system power source module with a removable power module according to an embodiment of the present invention;

FIG. 4 is a three-dimensional schematic view of a nuclear power plant personnel gate drive system drive and pressure balance module with a removable mount according to an embodiment of the present invention;

Fig. 5 is a detachable three-dimensional schematic diagram of an interlocking mechanism module of a transmission system of a personnel lock of a nuclear power plant according to an embodiment of the invention.

Detailed Description

In order to solve the technical problem that a personnel gate transmission structure in the prior art does not meet the design requirements of integration and modularization of a personnel gate, the invention aims to provide a personnel gate transmission system of a nuclear power plant, which has the core idea that: the functional design of the intermediate transmission case is consistent with that of the original scheme, and the interface output and the power output are unchanged; the middle transmission box uniformly packages the original chain wheel and chain in a box body in a tiled design, and adjusts the chain wheel and chain transmission into gear transmission so as to reduce the installation space of a transmission system; meanwhile, compared with chain wheel and chain transmission, the gear transmission is more accurate in control, the transmission rigidity can be improved, and the problem of return error is solved. After the power output part of the personnel gate transmission system of the nuclear power plant is integrated into the intermediate transmission case, the case body is subjected to modular design, and the intermediate transmission case is installed and decoupled with the equipment body. When the personnel gate is installed and operated and needed, the intermediate transmission case is installed, so that the maintenance requirements of the power station during field installation, debugging and maintenance are avoided. In the subsequent operation, if needing to be maintained, can be disassembled and replaced at any time.

in order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.