522 results about "Engine room" patented technology

The invention provides a ship unmanned aerial vehicle cabin multistage fire alarm system and method based on edge computing, and the system comprises an intelligent shipborne system and a shore-based cloud system, the intelligent shipborne system is disposed in a ship cabin, and has the functions of data collection, data abnormity perception, fire monitoring and multistage early warning; the method is composed of three levels of data acquisition, edge processing and fire decision making. The shore-based cloud system is a cloud end of a shore-based system arranged on the land, has the functions of transmitting and receiving distress signals, storing remote data and tracing large fire accidents, and is composed of a communication unit, a storage unit and an alarm unit. The intelligent ship-borne system is connected with the shore-based cloud system through the satellite communication technology, infrared thermal imaging and multi-source sensing fusion is achieved, the device has the edge processing capacity, the multi-level fire judgment logic and the shore-based remote traceability function, and the device is suitable for the closed, complex and unattended ship engine room environment.

A dozer including a cabin, the dozer includes: an engine room located in front of the cabin, where an engine is disposed; an exhaust gas after-treatment device for purifying exhaust gases emitted from the engine; a first cooling device located in front of the cabin and capable of cooling the exhaust gas after-treatment device; and a second cooling device spaced apart from the first cooling device, with the cabin midway therebetween, and capable of cooling the engine.

The invention relates to the technical field of intelligent ship control, and particularly discloses an area control integration method and system based on an intelligent ship engine room, original operation data and multi-source communication data of equipment in each area of the engine room are collected, a unified real-time state vector is generated through protocol analysis and standardization processing, and a plurality of redundant processing nodes are processed in a unified mode. Synchronizing and verifying state data through a high-speed channel, constructing a global consistent state synchronization set, disassembling composite logic into atomic operation units with state constraints according to an upper-layer instruction and the synchronization set, packaging the atomic operation units into a private instruction sequence bound with the state, executing the instruction sequence by a main node, and executing the state synchronization set by a slave node; seamless switching to a standby node is realized through independent hardware monitoring when a fault occurs, and the standby node continuously executes based on the continuity of a state synchronization set, so that high-reliability uninterrupted operation of area control is realized; according to the method, the problems of instruction semantic distortion and single-point fault risk in heterogeneous equipment integration are solved, and the control accuracy and the intelligent level are improved.

The invention relates to the technical field of hovercraft assembly, and discloses a method for assembling a propeller tower and a short engine room of a hovercraft, which is characterized in that a detection line reference system of a chassis frame and a height marker post is arranged at a ground prefabrication stage, so that the positioning adjustment of the propeller tower and the short engine room is completely completed at a low-altitude site; the operation risk that a scaffold is repeatedly erected and disassembled during high-altitude hoisting of a slipway in a traditional technology is avoided, a three-dimensional space positioning network is constructed by combining the plane datum of the chassis frame and the vertical datum of the height marker post, the precision error in the combining process is reduced, high-altitude closing operation of a traditional slipway stage is moved forwards to the ground site to be completed, and the working efficiency is improved. And the short engine room-paddle tower module only needs to be hoisted and positioned once when the ship body is finally carried, so that the processing period of a slipway is shortened, and the production cost of the hovercraft is further reduced.

The invention discloses a bevel angle transmission marine gear transmission device, which relates to the technical field of gear transmission, and comprises a box body, an input component, a transmission component and an output component, an ahead running transmission gear is fixed to an input shaft of the input component, and an ahead running driving gear with a clutch and a piston is installed on the input shaft in an empty sleeving mode. And a reversing transmission gear is fixed on a transmission shaft of the transmission part. The invention belongs to the breakthrough of the prior art, and can meet the requirements of inclination of an input shaft, a reversing shaft and an output shaft of a gear box by utilizing the displacement principle of gears with different center distances and the meshing transmission principle of crossed shaft gears. Gears on the three shafts can be mutually meshed and effectively work, the requirement that the high-speed boat inclines relative to the water surface when advancing on the water at a high speed is met, the diesel engine and the gear box are horizontally arranged in the cabin, the output shaft of the gear box outputs at a certain oblique angle, the structure is reliable, the process is easy to implement, and the high-speed boat has the advantages of being reasonable and compact in structural arrangement, high in transmission efficiency, low in cost and the like. And the weight is light.

Systems and apparatuses include a container for a generator set. The container includes a housing including a cooling room structured to support a radiator and a radiator fan within the housing, an exhaust room structured to support an aftertreatment system, an engine room structured to contain the engine and the alternator within the housing, an air intake system positioned adjacent the engine room, and a control room structured to support control equipment for the generator set. The exhaust room may further support after treatment components including a muffler and an exhaust pipe.

The invention relates to the technical field of hygienic products, and discloses an intelligent monitoring method and management system for ship pollutant discharge, and the method comprises the following steps: S1, collecting cabin equipment operation parameters and pollutant discharge data through a multi-source sensor network; s2, an early warning threshold value is dynamically calculated based on the environment working condition and the load state; s3, evaluating the health state of the equipment and predicting potential faults; s4, judging the pollutant discharge compliance; s5, executing a multi-stage control strategy according to evaluation and judgment results; in the step S1, the equipment operation parameters at least comprise temperature, pressure, vibration frequency and oil quality indexes. According to the invention, by integrating various sensors and intelligent processing algorithms, real-time monitoring and dynamic adjustment of ship pollutant emission are realized, and ship emission compliance is ensured; meanwhile, the system can evaluate the health state of the equipment in real time, predict potential faults in advance and automatically execute multi-stage response measures, so that the safety, the environmental protection property and the operation efficiency of the ship are improved.

The invention discloses a high-precision ball screw nut grinding device, which belongs to the technical field of grinding machining and comprises a base and a multi-point positioning clamping module. According to the device, the grinding assembly and the thread cutting assembly are arranged in a matched mode, two sets of grinding structures are adopted to grind the nut, compared with a traditional grinding structure, the contact area between the two sets of grinding structures and the surface of the nut is greatly reduced, multi-point contact grinding is adopted, and the grinding efficiency is greatly improved under the condition that grinding is not affected. Heat generated by materials during nut grinding can be greatly reduced, cooling liquid does not need to be used for real-time cooling, the cleanliness in a cabin is greatly improved, meanwhile, synchronous cutting of internal threads of the nut can be achieved in the process of external grinding of the nut, subsequent additional machining procedures are not needed, and the machining efficiency is improved. The nut machining efficiency is improved, the grinding thickness can be accurately controlled according to requirements during machining, and the actual application effect of equipment is improved.

The invention relates to a screw ship unloader cabin material collaborative perception and autonomous operation method based on a multi-source laser scanning array. The problems that in the prior art, a single laser scanning system is large in scanning blind area, high in positioning error and poor in hatch recognition stability are solved. The method comprises the following steps: S1, heterogeneous laser scanning array networking; s2, pose difference-IMU deep coupling of motion point cloud distortion suppression is carried out; s3, manually marking target spot binding; s4, point cloud data processing; and S5, multi-stage anti-collision control is carried out. The method has the advantages that the hatch recognition stability and the coal pile model construction precision are remarkably improved; the point cloud is not distorted in a dynamic environment, so that the manual intervention and the accident rate are effectively reduced; and the technical requirements of unattended ship unloading operation are met, and high industrial adaptability is achieved.

The present invention relates to a work machine, in particular a wheeled loader, having a cabin for the operator of the work machine and having an engine room arranged behind the cabin, wherein the work machine has a drive that is operable with hydrogen; and in that one or more tanks for the reception of hydrogen are present, with the tank or tanks being arranged in a hydrogen fuel system behind the cabin and above the engine room.

The invention provides a ship emergency power generation combined module, a building method and a ship engine room, and the ship emergency power generation combined module comprises a cavity structure, emergency power generation equipment, a fuel pipe system and a cable. The cavity structure is an independent structure formed by splicing a bottom surface structure, a top surface structure and a side wall structure. The top surface structure is provided with a skylight used for hoisting emergency power generation equipment in and out, the top surface structure is provided with a lifting lug, the side wall structure is provided with a cabin penetrating piece used for a cable to pass through, and the side wall structure is provided with a watertight door; a ventilation device is mounted on the cavity structure; the emergency power generation equipment is mounted in the cavity structure; and the fuel piping system and the cable are laid in the cavity structure. According to the ship emergency power generation combined module, the ship emergency power generation equipment, the pipe system and the cable are integrally designed to form a comprehensive unit similar to a ship section form, so that the ship emergency power generation system can be assembled and debugged in advance, and the ship assembly and debugging progress can be integrally improved.

The invention discloses an intelligent optical cable marine engine room management method and system, and the method comprises the steps: collecting the operation state data of each device in a marine engine room in real time through employing an Internet of Things sensor, transmitting the operation state data to a file module in real time, and carrying out the regular calling of the data, so as to adjust the monitoring parameters of each Internet of Things sensor; performing equipment health assessment on the operation state data by adopting an economical efficiency analysis tool, a performance degradation analysis tool and an equipment operation analysis tool, and generating a health assessment report; and generating a coping strategy for abnormal data in the health assessment report based on the expert knowledge base, and matching corresponding historical events and historical maintenance methods thereof in the archive module. According to the invention, comprehensive health assessment is carried out on each device in the ship by using a multi-dimensional analysis tool, the fault prediction accuracy is improved, a coping strategy is rapidly generated in combination with an expert knowledge base and historical data, the decision-making efficiency is improved, the intelligence level of a ship cabin system is promoted, and the safety, environmental protection, economical efficiency and reliability of ship management are improved.

The present invention provides an arrangement structure of a fuel tank for cabins of a ship and electric propulsion, comprising: an electric propulsion system (110) which is arranged in an engine room (111) and provides power produced by a gas turbine (112) as a propulsion force to an electric propulsion motor; a first liquefied gas storage tank (120) which is arranged in a cargo section (A) and supplies a first gas fuel to the gas turbine (112); and a second liquefied gas storage tank (130) which is arranged in a bow section (b) and supplies a second gas fuel to the gas turbine (112), to thereby secure safety and an extra space in the engine room through the arrangement of the second liquefied gas storage tank (130) in the bow.

The invention discloses a seabed dipole-dipole electromagnetic detection system and method carried on a remote control underwater robot, and belongs to the technical field of seabed metal mineral resource fine exploration. The system comprises a remote control underwater robot (ROV), a retractable receiving coil extension bracket, a transient electromagnetic transmitting coil, a transient electromagnetic receiving coil, a transient electromagnetic main engine room and an instrument fixing bracket. The extension bracket is controlled through the hydraulic retraction device, so that the receiving coil is arranged away from the ROV body, and the interference of the equipment body on electromagnetic signals is obviously reduced. The ROV performs low-altitude cruising on the seabed along a preset fine measuring line to acquire transient electromagnetic data, and the actually measured data is corrected in real time by using the full-space seawater environment response in the diving process, so that the system interference is effectively inhibited. According to the method, the high-resolution electromagnetic detection capability of ore bodies such as seabed polymetallic sulfide is improved, and the method is suitable for mineral resource investigation of complex terrains and small-scale regions.

The invention relates to the technical field of path planning, in particular to a path planning algorithm of an inspection robot and a medium, and the algorithm comprises the following steps: step 1, rasterizing a static marine engine room map which comprises expansion obstacles and topographic features, and based on the topographic features, introducing topographic factors and calculating a topographic weight graph; step 2, acquiring a starting point and a target point, and planning a global static optimal path by using an RA * algorithm based on the terrain weight graph; and step 3, using a rectangular frame screening method to screen out global key points in the global static optimal path. According to the method, different topographic features are used as one of the influence factors of the path cost, the path with small walking difficulty is more reasonable than the path with large walking difficulty, the evaluation index takes energy loss into consideration, and the kinematics law is better met; according to the algorithm, the safety distance of the robot is considered, and path redundancy and frequent turning are reduced.

The method comprises the following steps that a tiller and the upper conical surface of a rudderstock are matched in advance, and steering engine equipment is arranged in a steering engine room in advance; the main deck is provided with a permanent rudderstock hanging opening cover with a sealing cover; when a berth area rudderstock enters a cabin, a false nut tool is installed at the end of the rudderstock, hierarchical regulation and control of the rudderstock angle are achieved through a lifting lug, inclined pulling of a steel wire rope and insertion of round steel into a guide hole, and it is ensured that the rudderstock penetrates into a rudder sleeve along the center line of a rudder system. The problem that the rudderstock obliquely penetrates through the cabin due to the inclination angle of the slipway is solved; the steering engine room is sealed in advance, the rudderstock is precisely put into the room at the millimeter level, and the construction efficiency and quality are remarkably improved.

The utility model discloses a composite cabin ventilation system meeting dynamic positioning redundancy requirements, which comprises an exhaust shutter, an air inlet shutter and a fan which are positioned in an upper cabin, a structural air duct positioned in a middle cabin and a diesel generator set positioned in a lower cabin, and the air inlet shutter, the fan, the structural air duct and a cavity of the lower cabin are sequentially communicated. The cavity of the lower-layer cabin is communicated to an exhaust shutter through a chimney; and an air brake for controlling the ventilation quantity is arranged between the fan and the structural air duct. According to the utility model, a water cooling mode is utilized to completely replace the heat dissipation air volume of a main part during the design of a conventional cabin ventilation system, and the discharge capacity of a ventilation fan and the size of an air duct are reduced. The internal circulation cooling jet fan does not need to be started, normal operation of the ship can be guaranteed through the frequency conversion fans with the small number and power, and energy conservation and emission reduction are achieved. All the frequency conversion fans and the internal circulation cooling jet fans can work at the same time, the use requirements of tropical areas under extremely hot working conditions are met, and the working condition adaptability of ships is improved.

The invention relates to a construction method of a wind generating set. The construction method comprises the steps that a cabin, a hub, a plurality of blades and a plurality of tower drum sections are transported to an area where a fan foundation is located; one tower drum section is hoisted to the position above the draught fan foundation, and a guide structure arranged on the tower drum section and a locking structure arranged on the draught fan foundation are matched in a locking mode and fixed through a fastener; the next tower drum section is hoisted to the position above the tower drum section connected with the draught fan foundation, and the two tower drum sections are locked and matched through a guide structure and a locking structure and fixed through fasteners; assembling the engine room, the hub, the plurality of blades and one tower drum section into a machine head main body; and the machine head main body is hoisted to the position above the fan foundation, and the tower drum section of the machine head main body and the other tower drum section are locked and matched through the guide structure and the locking structure and are fixed through a fastener. The installation requirement of the wind generating set in the deep sea field can be met, and the installation difficulty and cost are reduced.

The utility model discloses a waterproof raft fishing wheel which comprises a body. A clutch transmission shaft; a drive shaft; a first waterproof ring mounting hole is formed in the outer side of the clutch transmission shaft mounting hole, a first waterproof ring is mounted in the first waterproof ring mounting hole, a first rubber ring sleeves the root of the first main shaft screw, a second waterproof ring mounting hole is formed in the outer side of the driving shaft mounting hole, and a second waterproof ring is mounted in the second waterproof ring mounting hole. A second waterproof ring mounting hole is formed in the right end face of the main body cover plate, a second waterproof ring is mounted in the second waterproof ring mounting hole, a through hole corresponding to the line wheel seat is formed in the right end face of the main body cover plate, a third waterproof ring mounting hole is formed in the outer side of the through hole, and a third waterproof ring is mounted in the third waterproof ring mounting hole. The waterproof raft fishing wheel is reasonable in structural design, reliable waterproof measures are taken at all possible water inlet points of the main body, so that the whole cabin is in a completely closed waterproof state, and worries of a fisher are relieved.

The invention provides a ventilation overflow method for oil tanks in a cabin area. The ventilation overflow method comprises the following steps that the number of ventilation pipes of all the oil tanks is determined; after the number of each oil tank vent pipe is determined, the pipe diameter of the oil tank vent pipe is determined according to the pipe diameter of the injection pipe; ventilating pipes with corresponding pipe diameters are led to a chimney trunk on a deck 1 from the top in each oil tank; a horizontal ventilation header pipe is arranged at the position of a chimney trunk on a deck 1, and ventilation pipes of all oil tanks are converged into the ventilation header pipe; an overflow alarm box is arranged on the deck surface 1; a discharge pipe is led to the bottom of the pipe section with the maximum pipe diameter of the ventilation main pipe to be connected to an injection port of an overflow alarm box below; the alarm overflow pipe is connected to the overflow cabin; the overflow alarm box is provided with an alarm vent pipe, and one path extends to the chimney top. A safe and feasible ventilation and overflow scheme is provided for the oil tank in the engine room area, ventilation is concentrated, arrangement of ventilation pipelines is reduced, overflow pipelines are ingeniously arranged, the overflow response time is prolonged, and the safety of a ship is greatly improved.

The invention discloses an oil-electricity dual-drive ship outboard engine which comprises an engine body structure and a connecting support, the engine body structure is connected with the tail of a ship through the connecting support, the engine body structure can rotate along the connecting support, the engine body structure comprises an engine body, and an engine room is installed at the upper end of the engine body; a gearbox is installed at the lower end of the machine body, and a vortex baffle is integrated on the machine body and located above the gearbox. The paddle mechanism is installed through the gear box and located below the vortex blocking plate, and when the paddle mechanism rotates, forward power is provided for the ship; the electric drive unit is installed through the engine room, the oil drive unit is also installed through the engine room, and the oil drive unit and the electric drive unit are isolated; a clutch transmission device; the device is electrically driven at a low speed and is driven by fuel oil at a high speed.

The invention relates to the technical field of fire early warning, and discloses a marine engine room fire multi-sensor fusion automatic early warning system, which comprises a data analysis unit, a baseline adjustment unit, a data correction unit, an anomaly analysis unit, a cooperative calculation unit and a fire early warning unit, and is characterized in that the thermal state of an engine room is accurately reflected through a global working condition coefficient generated by the data analysis unit; a dynamic sensing datum line generated by the baseline adjustment unit can adapt to working condition changes in real time, the data correction unit eliminates interference and generates refining abnormal signals, the abnormity analysis unit generates a single-dimensional burst strength index through abnormal energy flux and other parameters to achieve accurate scoring, and the cooperative calculation unit and the fire early warning unit are matched with each other. According to the method, the fire early warning instruction is generated, the accuracy of multi-sensor cooperative fire discrimination is improved, meanwhile, the adaptability of the early warning scheme to dynamic working conditions is enhanced, and the accuracy of cabin fire monitoring is guaranteed.

The invention relates to the technical field of ship construction, and discloses a container ship module block division method which comprises the following steps: S1, according to a functional system, a hoisting system and a segmented supporting tool, dividing a container ship into a cabin module block, a cargo hold module block, a bow module block and a superstructure module block; s2, the cabin module block is divided into a front cabin subsection, a rear cabin subsection, a cabin upper cover subsection and a rudder upper cover subsection by taking base distribution as a benchmark; s3, dividing the cargo compartment module block into a bottom section, a broadside section and a transverse bulkhead section by taking the length of the container as a reference; s4, dividing the bow module block into a bow lower ring section, a bow upper ring section, a bow upper section and a bow lower section by taking distribution of a liquid tank base and a lateral thrust tank base as a reference; and S5, taking the integrity of the cabin as a benchmark, and dividing the superstructure module block into one or more sub-segments. The weight and the height of each module block are increased, the number of segments included in each module block is reduced, and the construction period in the dock is shortened.

According to the method, a bow draught measuring sensor is arranged at the bow part of a ship, a stern draught measuring sensor is arranged at the stern part of the ship, when the longitudinal inclination of the ship is in a stern inclination state, the distance from a propeller blade to the stern draught sensor is defined as L1, the distance from a stern water gauge mark to the bow draught sensor is defined as L2, and the L1 is a positive integer; and by analyzing the relationship among the parameters, establishing a model to obtain the draft Tp at the propeller blade. When Tplt; and when the upper edge of the propeller blade is high, the propeller is not completely immersed. In practical engineering application, the calculation can be completed by a central control system, a cabin monitoring alarm system or a liquid level telemetering system, and an alarm is extended to a control center to remind sailors that the propeller is not completely immersed, so that the rotating speed of a main engine is reduced or the longitudinal trim of a ship is adjusted, and the high temperature of a stern tube bearing is avoided.

The invention discloses a closed cabin multi-sensor fire monitoring and self-adaptive control method and system, and particularly relates to the field of fire monitoring and control, and the method comprises the steps: collecting and extracting a first disaster feature through a multi-modal sensor, fusing the confidence of the sensor, and predicting the fire feature through the combination of a long-short-term memory network and a topological structure; and finally generating a fire extinguishing instruction matrix and optimizing task allocation. According to the closed cabin multi-sensor fire monitoring and self-adaptive control method and system, a multi-modal sensor array is deployed, and a hardware timestamp protocol is adopted, so that a data basis is provided for dynamically adapting to multi-modal characteristic changes in different fire source development stages; the fire behavior development stage is quantified through the disaster situation stage recognition model, so that the fire behavior decision can be dynamically adjusted according to the real-time stage index; through a long-short-term memory network algorithm and in combination with cabin topological data, adaptive prediction of a fire diffusion path is realized, and the limitation of a traditional predefined mapping table is broken through.

The invention discloses a ship electromechanical equipment fault diagnosis system and method based on transfer learning, and the system comprises an equipment data preprocessing layer, an equipment fault diagnosis model, and an optimized fault diagnosis model layer. The equipment data preprocessing layer comprises a working condition data acquisition unit, a time sequence data processing unit and a working condition feature fusion unit; the equipment fault diagnosis model comprises a source domain, a target domain, a fault attention unit and a fault diagnosis unit; a feature mapping network is trained by adopting a transfer learning method through electromechanical equipment working condition features to obtain an equipment fault diagnosis model; aligning the characteristics of the working condition characteristic vectors distributed in the source domain with the characteristic vectors of the target domain through a gradient inversion method to obtain an equipment fault network; the method can be directly deployed to an intelligent cabin system of the unmanned ship, real-time fault diagnosis of electromechanical equipment is realized, and a powerful guarantee is provided for safe operation of the unmanned ship.

The invention belongs to the technical field of liquid carbon dioxide transport ships, and particularly relates to a novel liquid carbon dioxide transport ship adopting a fiber composite liquid cargo tank. The ship comprises a main ship body. The main ship body comprises a tail module, a cabin module, a cargo compartment module and a head module. A plurality of independent cargo compartment chambers are arranged in the cargo compartment module, and the adjacent cargo compartment chambers are separated through transverse compartment walls; an independent carbon dioxide liquid cargo tank, a top ballast tank and a bottom ballast tank are arranged in each independent cargo compartment; the carbon dioxide liquid cargo tank is made of a fiber composite material or a combination of steel and the fiber composite material and comprises an inner container and a winding layer, and the cross section of the carbon dioxide liquid cargo tank is of a bilateral symmetry polygonal structure. The carbon dioxide liquid cargo tank is connected with the hull structure through supporting blocks. The liquid carbon dioxide transport ship is high in cargo hold area capacity utilization rate, high in stability and reliability and low in capacity requirement for hoisting facilities in the construction process.

To aim for effective use of the space in a hull and to improve a degree of freedom in design.SOLUTION: A ship comprises an engine room which is provided in a hull and in which an engine is accommodated, a lower vehicle deck forming a ceiling of the engine room, an upper vehicle deck provided above the lower vehicle deck, a first casing installed between the upper vehicle deck provided just above the lower vehicle deck and the lower vehicle deck, and forming the space to pull out a piston in communication with the engine room, and a second casing extending upward on the upper vehicle deck from the lower vehicle deck at the position different from the first casing in plan view, and forming a pipe insertion space which guides the exhaust pipe flowing the engine exhaust gas above the upper vehicle deck.SELECTED DRAWING: Figure 2

The invention provides a method for constructing a methanol cabin section of a methanol power container ship engine room shed. The method comprises the steps that the methanol cabin section is divided into a first platform middle assembly, a second platform middle assembly and a top enclosure bulkhead small assembly; the first platform middle assemblage, the second platform middle assemblage and the top enclosure bulkhead small assemblage are built; and the first platform middle assembly and the second platform middle assembly are overturned to normal states, the first platform middle assembly is positioned and placed on the jig frame, then the second platform middle assembly is positioned and installed on the first platform middle assembly, and finally the top enclosure bulkhead small assembly is installed on the top of the second platform middle assembly. By the adoption of the method, smooth subsection building can be achieved, subsection building difficulty is lowered, subsection building precision is guaranteed, and construction efficiency is improved.

A personal watercraft includes a watercraft body provided with a deck, a hood, and a locking mechanism. The deck includes a driver boarding portion and an opening forming portion where an opening is formed forward of the driver boarding portion and an engine room is partitioned below the opening. The hood, to which a steering shaft is attached to cause a handle to be exposed upward, covers the opening from above to allow opening and closing by pivoting with respect to the deck by using a front end supported by the opening forming portion as a fulcrum. The locking mechanism is a mechanism that fixes the rear end of the hood to the deck with the opening closed, and includes a first locking part and a second locking part disposed with spacing in the left-right direction.