Energy storage charging device in crane power supply system and power supply method

Abstract

The invention discloses an energy storage charging device in a crane power supply system, and relates to the technical field of crane power supply, the energy storage charging device comprises a rail bearing beam and a crane body, the inner side of the rail bearing beam is provided with a charging position, one side of the crane body is provided with an energy storage charging box, the bottom of the energy storage charging box is provided with a connector, and the connector is connected with the charging position. The charging position comprises a U-shaped plate and a charging base, a photoelectric emitter is arranged at the top of the charging base, and a photoelectric receiver is arranged at the bottom of the connector. The charging position is used for replacing a traditional long-distance sliding contact line, the complex installation process of arranging a full-length sliding contact line is simplified, a large number of sliding contact lines and a large number of fixing supports are omitted, and the cost is reduced; the configuration and installation cost is reduced, the construction difficulty is reduced, after the connector deviates, under driving of the electric telescopic rod, the charging base continues to move upwards, and under matching of the inclined faces of the first wedge-shaped block and the second wedge-shaped block, the charging base moves in the deviation direction of the connector and is correspondingly matched with the connector.

Description

Technical Field

[0001] The present invention relates to the technical field of crane power supply, and in particular to an energy storage charging device and a power supply method in a crane power supply system. Background Art

[0002] The traditional crane power supply system generally passes through the workshop distribution room through the ground cable, the crane switch cabinet, and then is connected to the busbar of the crane rail beam through a cable. A collector takes electricity from the busbar and supplies it to the crane's main electric control cabinet. The crane's main control cabinet then transmits the AC power to the corresponding frequency converter as needed, and then transmits it to the frequency conversion motor for use after a series of processing.

[0003] The Chinese patent application number 202310974684.4 discloses a communication power supply system for a container gantry crane, the system comprising a bracket, a guide rail, a power supply / communication busbar arranged inside the guide rail, and a power collection / communication mechanism, the power collection / communication mechanism comprising a moving part, which is slidably mounted on the bottom of the guide rail and connected to the crane, a mounting part, which is connected to the moving part and has brushes and a communication antenna mounted on the top, and an adjustment part for adjusting the mounting part to make it move on the moving part. The power supply of the crane to the power supply system is limited by power grid fluctuations, which affects the operating efficiency of the crane. In addition, the power supply of the crane requires the laying of a full-length busbar, which has high operating costs and great construction difficulty. The busbar is difficult to maintain during its use, and there are many inconveniences in its use.

[0004] In addition, due to wear and tear caused by swinging friction between the crane and the rail supporting beam, as well as equipment loss such as loose rails, the crane will have a horizontal offset on the rail supporting beam, which will affect the normal power supply of the crane charging connector. In addition, during use, the charging position will be covered with dust and other impurities, which will cause poor contact between the charging connector and the charging position contact piece, resulting in low charging efficiency and charging interruption.

[0005] Therefore, an energy storage charging device and a power supply method in a crane power supply system are proposed to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to disclose an energy storage charging device and a power supply method in a crane power supply system to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an energy storage charging device in a crane power supply system, comprising a rail-supporting beam and a crane body, a charging position is provided on the inner side of the rail-supporting beam, an energy storage charging box is provided on one side of the crane body, and a joint is provided at the bottom of the energy storage charging box;

[0008] The charging position includes a U-shaped plate and a charging base, a photoelectric transmitter is provided on the top of the charging base, and a photoelectric receiver is provided on the bottom of the connector;

[0009] An extension groove is provided in the middle of the U-shaped plate, slide grooves are provided on both sides of the charging base, an electric latch is provided on one side of the slide groove, an expansion piece is provided on the top of the U-shaped plate, an air pressure sensor is provided inside the expansion piece, an air jet tube is provided at the bottom of the expansion piece, an air intake pipe is provided on the top of the U-shaped plate, a piston head is movably connected inside the air intake pipe, a first locking mechanism is provided inside the piston head, a push rod is movably connected to one end of the piston head away from the expansion piece, and a connecting assembly is provided between the push rod and the telescopic end of the electric latch;

[0010] An electric telescopic rod is provided on the inner lower surface of the U-shaped plate, and the telescopic end of the electric telescopic rod is slidably connected to the bottom of the charging base.

[0011] Optionally, a support frame is provided at the bottom of the U-shaped plate, and one end of the support frame away from the U-shaped plate is fixedly connected to the fixed plate, and a cable is provided inside the support frame, and one end of the cable away from the support frame passes through the bottom of the rail-supporting beam and is connected to a switch cabinet, and the switch cabinet is a crane switch cabinet, and the input end of the switch cabinet is connected to a ground cable, and one end of the support frame is provided with a fixed plate, and the support frame is fixedly connected to the inner side of the rail-supporting beam through the fixed plate, and a battery management system is provided in the energy storage charging box.

[0012] Optionally, the crane body is movably connected to the top of the track-bearing beam, and the crane body includes a trolley traveling mechanism, a small trolley traveling mechanism and a lifting mechanism, and the trolley traveling mechanism, the small trolley traveling mechanism and the lifting mechanism are all powered by an energy storage charging box.

[0013] Optionally, the connector is a charging connector, the connector corresponds to the inner side of the U-shaped plate, the internal space of the U-shaped plate is larger than the volume of the connector, and the photoelectric transmitter corresponds to the photoelectric receiver.

[0014] Optionally, a valve is provided at the bottom end of the jet pipe, the bottom end of the jet pipe corresponds to the bottom of the charging slot, and a gas diffuser is provided at the bottom end of the jet pipe.

[0015] Optionally, the charging base is located inside the extension groove, the width of the extension groove is larger than the charging base, a charging groove is opened in the middle of the charging base, a first contact piece is provided at the bottom of the charging groove, the first contact piece is electrically connected to the cable in the support frame, a second contact piece is provided at the bottom of the connector, the first contact piece corresponds to the second contact piece, the first locking mechanism is used to lock the piston head in the intake pipe, and one end of the intake pipe is connected to the interior of the expansion piece.

[0016] Optionally, the connecting assembly includes a first wedge block provided at the telescopic end of the electric bolt and a second wedge block at the bottom of the push rod, the second wedge block corresponds to the first wedge block, a locking structure is provided between the first wedge block and the second wedge block, the locking structure includes a first locking plate and a second locking plate, the first locking plate is provided on the inclined surface of the first wedge block, the second locking plate is provided on the inclined surface of the second wedge block, electromagnetic locks are provided at both ends of the first locking plate, and lock holes matching the electromagnetic locks are provided on the second locking plate, and a plurality of lock holes are provided at equal intervals, the second locking plate is made of magnetic metal material, and an electromagnet is provided in the middle of the first locking plate.

[0017] Optionally, the expansion member is located on the inner side of the top of the U-shaped plate, the air intake pipe is in an L-shaped structure, the other end of the air intake pipe is located on the top of the extension groove, and the push rod and the charging base are arranged perpendicular to each other;

[0018] The telescopic end of the electric telescopic rod is provided with a sliding block, the bottom of the charging base is provided with a slideway, and the sliding block is slidably connected inside the slideway.

[0019] A power supply method for an energy storage charging device in a crane power supply system comprises the following steps:

[0020] S1, 380V50Hz AC power is supplied from the workshop power distribution room to the switch cabinet through the ground cable, and then supplied to the charging position along the cable. The charging position does not cause movement interference to the crane body when the crane body is operating normally. The charging position charges the battery in the energy storage charging box during the trough period;

[0021] S2, when the crane body is in normal operation, the battery in the energy storage charging box transmits direct current to the motor controller of the crane body, and then transmits it to the motor after conversion;

[0022] S3. When the energy storage charging box is charged, charging is performed after the connector is docked with the charging position, and the battery management system monitors the charging status of the battery.

[0023] Technical effects and advantages of the present invention:

[0024] 1. The present invention replaces the traditional long-distance busbar with a charging position, simplifies the complicated installation process of arranging the full-length busbar, saves a large number of busbars and fixing brackets, reduces the configuration and installation cost and reduces the construction difficulty. In later use, when the charging position needs debugging and maintenance, the target charging position can be made clearer, without the need to troubleshoot a large number of busbars, which provides convenience for later use.

[0025] 2. The connector of the present invention does not interfere with the connector when passing through the inside of the U-shaped plate, thereby preventing the connector from being unable to dock with the U-shaped plate when the crane body is offset, so that the connector can still dock with the charging base to complete the charging of the battery in the energy storage charging box.

[0026] 3. After the joint is offset, the offset direction of the joint is detected and determined by the increase in the pressure value in the expansion piece, and then the charging base continues to move upward under the drive of the electric telescopic rod, and with the cooperation of the first locking plate and the second locking plate, the charging base moves in the offset direction of the joint and matches the joint accordingly.

[0027] 4. In the present invention, after the charging base and the connector are aligned in position, while the electric telescopic rod continues to drive the charging base to move upward and dock with the connector, the valve is opened to allow the gas in the expansion piece to be quickly blown into the charging slot through the jet pipe, so as to achieve the purpose of blowing away dust and impurities in the charging slot, thereby avoiding the accumulation of dust and other impurities between the charging base and the connector, which may affect the stable docking of the connector and the charging base. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a partial structural schematic diagram of the power supply system of the crane body of the present invention;

[0029] Figure 2 A schematic diagram of the charging position and connector structure of the present invention;

[0030] Figure 3 A schematic diagram of a top view of the charging position structure of the present invention;

[0031] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure along the AA section line;

[0032] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of the middle A area;

[0033] Figure 6 It is a schematic diagram of the bottom structure of the joint of the present invention;

[0034] Figure 7 is a schematic diagram of the gas diffuser structure of the present invention;

[0035] Figure 8 Schematic diagram of the locking structure of the present invention.

[0036] In the figure: 1, rail beam; 2, switch cabinet; 3, cable; 4, fixing plate; 401, support frame; 402, U-shaped plate; 403, charging base; 4031, charging slot; 4032, first contact piece; 4033, photoelectric transmitter; 4034, slide; 4035, electric bolt; 4036, first wedge block; 4037, first locking plate; 4038, slideway; 404, extension slot; 405, expansion piece; 4051, spray Air pipe; 4052, air pressure sensor; 4053, valve; 4054, gas diffuser; 406, air intake pipe; 4061, piston head; 4062, push rod; 4063, second wedge block; 4064, second locking plate; 407, electric telescopic rod; 4071, slider; 5, crane body; 501, energy storage charging box; 502, connector; 5021, second contact piece; 5022, photoelectric receiver; 6, ground cable. DETAILED DESCRIPTION

[0037] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from the description. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0039] See also Figure 1 The present application discloses an energy storage charging device in a crane power supply system, including a rail-bearing beam 1 and a crane body 5. A charging position is provided on the inner side of the rail-bearing beam 1, and the charging position replaces the traditional long-distance busbar. The setting of the charging position effectively simplifies the complex installation process of the traditional full-length busbar, and there is no need to equip a large number of busbars and fixed brackets, thereby reducing the installation cost and reducing the construction difficulty. In addition, the number of charging positions is small, and when configuring the charging positions, the installation quality of the charging positions can be better ensured. In later use, if the charging position needs debugging and maintenance, the target charging position can be made clearer, and there is no need to troubleshoot a large number of busbars, which provides convenience for later use.

[0040] An energy storage and charging box 501 is provided on one side of the crane body 5, and a battery management system is provided in the energy storage and charging box 501. A joint 502 is provided at the bottom of the energy storage and charging box 501, and the joint 502 is a charging joint. The crane body 5 is movably connected to the top of the track-bearing beam 1. The crane body 5 includes a trolley traveling mechanism, a trolley traveling mechanism and a lifting mechanism, and the trolley traveling mechanism, the trolley traveling mechanism and the lifting mechanism are all powered by the energy storage and charging box 501 (the trolley traveling mechanism, the trolley traveling mechanism and the lifting mechanism of the crane body 5 are all existing technologies and are not described in detail here). Batteries are provided in the energy storage and charging box 501, and multiple groups of batteries can be provided. Multiple groups of batteries provide power to multiple power units respectively, so that when a certain group of batteries has problems or needs maintenance, only the motion mechanism corresponding to the group of batteries is affected, and other motion mechanisms can still work normally through the corresponding batteries.

[0041] The crane body 5 is driven by the trolley traveling mechanism to move to the charging position. According to the working range of the crane body 5 , the number of charging positions can be flexibly set according to the distance that the crane body 5 moves along the rail beam 1 .

[0042] like Figure 1-4 and Figure 6 As shown, the charging position includes a U-shaped plate 402 and a charging base 403. A support frame 401 is provided at the bottom of the U-shaped plate 402. One end of the support frame 401 away from the U-shaped plate 402 is fixedly connected to the fixing plate 4. A cable 3 is provided inside the support frame 401. One end of the cable 3 away from the support frame 401 passes through the bottom of the rail beam 1 and is connected to the switch cabinet 2. The switch cabinet 2 is a crane switch cabinet. The input end of the switch cabinet 2 is connected to the ground cable 6. A fixing plate 4 is provided at one end of the support frame 401. The support frame 401 is fixedly connected to the inner side of the rail beam 1 through the fixing plate 4. The fixing plate 4 is installed on the inner side of the rail beam 1 by bolts. The joint 502 corresponds to the inner side of the U-shaped plate 402. The inner lower part of the U-shaped plate 402 An electric telescopic rod 407 is provided on the surface, and the telescopic end of the electric telescopic rod 407 is connected to the bottom of the charging base 403. An extension groove 404 is opened in the middle of the U-shaped plate 402, and the charging base 403 is located inside the extension groove 404. A charging groove 4031 is opened in the middle of the charging base 403. When the charging groove 4031 is docked with the connector 502, a first contact piece 4032 is provided at the bottom of the charging groove 4031, and the first contact piece 4032 is electrically connected to the cable 3 in the support frame 401. A second contact piece 5021 is provided at the bottom of the connector 502, and the second contact piece 5021 is electrically connected to the battery in the energy storage charging box 501, and the first contact piece 4032 corresponds to the second contact piece 5021.

[0043] When in use, the crane body 5 moves laterally along the track beam 1 through the trolley traveling mechanism, the lifting mechanism moves longitudinally along the movable track of the crane body 5 through the trolley traveling mechanism, and the cargo hook under the crane body 5 is transferred through the lifting mechanism, wherein the trolley traveling mechanism, the trolley traveling mechanism and the lifting mechanism are all provided with controllers, the trolley controller receives the DC power supply from the battery in the energy storage charging box 501, and supplies it to the trolley motor after conversion, the trolley controller receives the DC power supply from the battery in the energy storage charging box 501, and supplies it to the trolley motor after conversion, the lifting controller receives the DC power supply from the battery in the energy storage charging box 501, and supplies it to the lifting motor after conversion, the trolley motor, the trolley motor and the lifting motor are all permanent magnet synchronous motors, which convert traditional AC power into DC power, and are more energy-efficient. At the same time, the charging period of the battery in the energy storage charging box 501 can be selected during the valley period when the grid load is low, so as to reduce energy consumption costs, and the energy consumption of each motor braking is fed back to the battery after power generation, further reducing energy consumption and costs.

[0044] During the operation of the crane body 5, the charging base 403 is located at the bottom of the extension groove 404. At this time, the cable 3 in the support frame 401 is bent. When the trolley walking mechanism drives the crane body 5 to pass the charging position through the trolley motor, it passes directly through the middle of the U-shaped plate 402 without generating friction contact with the charging base 403.

[0045] When the battery in the energy storage charging box 501 needs to be charged, the trolley walking mechanism drives the crane body 5 to move to the nearest charging position through the trolley motor, so that the connector 502 corresponds to the charging slot 4031 of the U-shaped plate 402. At this time, the electric telescopic rod 407 is used to control its telescopic end to be pushed upward, so that the first contact piece 4032 and the second contact piece 5021 are connected to each other, so that the charging base 403 can charge the battery in the energy storage charging box 501.

[0046] After the battery in the energy storage charging box 501 is fully charged, the telescopic end of the electric telescopic rod 407 is controlled to retract downward, so that the charging base 403 and the joint 502 are separated from each other, and then the trolley traveling mechanism controls the crane body 5 to continue to move along the track beam 1 to operate.

[0047] See also Figure 1-8In actual use, the crane body 5 will be horizontally offset on the rail beam 1 due to wear, swing friction and rail loosening between the crane body 5 and the rail beam 1. The offset will affect the docking and charging of the connector 502 and the charging base 403. At the same time, due to the lack of detection means for whether the connector 502 and the charging base 403 correspond, the stable docking of the connector 502 and the charging base 403 cannot be guaranteed, which leads to high heat generation between the connector 502 and the charging base 403, which will seriously cause fire accidents and threaten nearby personnel and equipment. In order to solve the above problems:

[0048] The internal space of the U-shaped plate 402 is larger than the volume of the connector 502, and the width of the extension groove 404 is larger than the charging base 403, so that the charging base 403 has horizontal movement space when offset in the extension groove 404, and a photoelectric transmitter 4033 is provided on the top of the charging base 403, and a photoelectric receiver 5022 is provided on the bottom of the connector 502, and the photoelectric transmitter 4033 corresponds to the photoelectric receiver 5022.

[0049] Slide grooves 4034 are provided on both sides of the top of the charging base 403, and an electric latch 4035 is provided on one side of the slide groove 4034. An expansion member 405 is provided on the top of the U-shaped plate 402. The expansion member 405 is a component that increases the internal air pressure when gas is introduced and decreases the internal air pressure when gas is transported outward. The expansion member 405 is preferably an elastic balloon. An air pressure sensor 4052 is provided inside the expansion member 405. The expansion member 405 is located on the inner side of the top of the U-shaped plate 402. The air inlet pipe 406 is in an L-shaped structure, and the air inlet pipe 406 is away from the expansion member 405. One end of 05 is located at the top of the extension groove 404, the push rod 4062 and the charging base 403 are arranged perpendicular to each other, and there are two expansion members 405, which are symmetrically arranged on the top inner side of the U-shaped plate 402. After the two expansion members 405 are moved to the corresponding position of the U-shaped plate 402 at the joint 502, the pressure value in the expansion member 405 is detected by the air pressure sensor 4052, and the change of the gas pressure in the two expansion members 405 is used to judge whether the crane body 5 and the joint 502 are offset and the offset direction.

[0050] The bottom of the expansion member 405 is provided with an injection pipe 4051, the bottom end of the injection pipe 4051 is provided with a valve 4053, the top of the U-shaped plate 402 is provided with an air inlet pipe 406, one end of the air inlet pipe 406 is communicated with the inside of the expansion member 405, the inside of the air inlet pipe 406 is movably connected with a piston head 4061, the inside of the piston head 4061 is provided with a first locking mechanism, the first locking mechanism is used to lock the piston head 4061 in the air inlet pipe 406, the first locking mechanism is an electromagnetic lock, the end of the piston head 4061 away from the expansion member 405 is movably connected with a push rod 4062, the push rod 4062 and A connecting component is provided between the telescopic ends of the electric latch 4035, and the connecting component controls the connection or disconnection between the charging base 403 and the push rod 4062. The upward movement of the telescopic end of the electric telescopic rod 407 will drive the push rod 4062 to move upward, thereby inputting gas into the expansion member 405. At this time, if the electric telescopic rod 407 drives its telescopic end to move downward, the gas in the expansion member 405 can be sucked out, keeping the expansion member 405 in a deflated state, so that when the crane body 5 moves along the rail beam 1 and passes the charging position, the joint 502 will not contact the expansion member 405, thereby avoiding friction loss of the expansion member 405.

[0051] Specifically, the connecting assembly includes a first wedge block 4036 disposed at the telescopic end of the electric bolt 4035 and a second wedge block 4063 at the bottom of the push rod 4062, the second wedge block 4063 is matched with the first wedge block 4036, and a locking structure is provided between the first wedge block 4036 and the second wedge block 4063. Figure 8 As shown, the locking structure includes a first locking plate 4037 and a second locking plate 4064. The first locking plate 4037 is arranged on the inclined surface of the first wedge block 4036, and the second locking plate 4064 is arranged on the inclined surface of the second wedge block 4063. Electromagnetic locks are arranged at both ends of the first locking plate 4037, and the second locking plate 4064 is provided with a lock hole matching the electromagnetic lock, and a plurality of lock holes are arranged at equal intervals. The second locking plate 4064 is made of magnetic metal material, and an electromagnet is arranged in the middle of the first locking plate 4037. When the electromagnet is energized, it attracts the second locking plate 4064.

[0052] Through the coordination of multiple lock holes and electromagnetic locks, when the first locking plate 4037 moves along the inclined surface of the second locking plate 4064, the electromagnetic lock remains in a retracted state. When the position between the first locking plate 4037 and the second locking plate 4064 is fixed, the electromagnetic lock is docked with the corresponding lock hole at this time to fix the position of the first locking plate 4037 and the second locking plate 4064, maintain the fixed connection between the electric latch 4035 and the push rod 4062, and the telescopic end of the electric telescopic rod 407 is slidably connected to the bottom of the charging base 403. The telescopic end of the electric telescopic rod 407 is provided with a slider 4071, and a slide 4038 is provided at the bottom of the charging base 403. The slider 4071 is slidably connected to the inside of the slide 4038.

[0053] like Figure 7 As shown, the bottom end of the jet pipe 4051 corresponds to the bottom of the charging slot 4031 . In order to increase the coverage of the gas output outward through the jet pipe 4051 in the expansion member 405 , a gas diffuser 4054 is provided at the bottom end of the jet pipe 4051 .

[0054] When in use, when the connector 502 passes through the inside of the U-shaped plate 402, no interference is caused to the connector 502, so as to avoid the connector 502 being unable to dock with the U-shaped plate 402 when the crane body 5 is offset. At the same time, after the crane body 5 and the connector 502 are offset, since the U-shaped plate 402 reserves an offset space for the connector 502, the connector 502 can still dock with the charging base 403 to complete the charging of the battery in the energy storage charging box 501.

[0055] However, due to the offset of the connector 502, when the connector 502 is docked with the charging slot 4031, the first contact piece 4032 and the second contact piece 5021 will be misaligned. At this time, the contact area between the first contact piece 4032 and the second contact piece 5021 is reduced, and the current resistance is increased, which affects the charging efficiency of the battery in the energy storage charging box 501. The following improvements are made:

[0056] First, the first locking plate 4037 and the second locking plate 4064 are locked by the electromagnetic lock and the lock hole, the electric latch 4035 maintains its extended locking state, the first locking mechanism inside the piston head 4061 is closed, the limit on the piston head 4061 is released, the valve 4053 remains closed, and the electric telescopic rod 407 drives the charging base 403 to move up a distance a, where the distance a is the distance between the lower surface of the charging base 403 and the upper surface of the extension groove 404. The piston head 4061 moves upward a distance a driven by the push rod 4062, so that the gas in the intake pipe 406 is transported to the expansion member 405, so that the gas pressure in the two expansion members 405 reaches The standard value of the gas pressure in the two expansion members 405 is the same. Then the air pressure sensor 4052 in the two expansion members 405 detects whether the joint 502 is offset. When the joint 502 moves with the crane body 5 driven by the trolley walking mechanism and the joint 502 is docked with the U-shaped plate 402, if the joint 502 is not offset, the pressure values ​​in the two expansion members 405 remain close or unchanged. At this time, the first contact piece 4032 corresponds to the second contact piece 5021, and the charging base 403 is driven upward by the electric telescopic rod 407 to make the first contact piece 4032 and the second contact piece 5021 docked.

[0057] After the connector 502 is docked with the U-shaped plate 402, if the photoelectric receiver 5022 cannot receive the optical signal emitted by the photoelectric transmitter 4033, it indicates that the connector 502 is offset. At this time, the pressure value change in the expansion member 405 is detected by the air pressure sensor 4052. When the pressure value in the expansion member 405 on one side increases, it indicates that the connector 502 is offset in the direction of the expansion member 405 with increased pressure value, thereby confirming the offset direction of the connector 502. At this time, in order to ensure the positive docking of the first contact piece 4032 and the second contact piece 5021, the first locking plate 4037 and the second locking plate 4064 on the side away from the expansion member 405 with increased pressure value are disconnected through the electromagnetic lock and the lock hole, and the connector 502 is connected to the U-shaped plate 4021. The electromagnetic lock and the lock hole in the first locking plate 4037 and the second locking plate 4064 on the side of the expansion member 405 with increased pressure value are kept locked and connected (for the convenience of explanation, the side away from the expansion member 405 with increased pressure value is recorded as the left side, and the side close to the expansion member 405 with increased pressure value is recorded as the right side. In this embodiment, the connector 502 is offset to the right side). At this time, the right electric latch 4035 maintains its extended locking state, the left electric latch 4035 is in the disconnected state, the first locking mechanism in the left piston head 4061 is opened and locks the piston head 4061 inside the intake pipe 406, and then the electric telescopic rod 407 drives the charging base 403 to move up to a distance b, and the distance b is the charging The distance between the lower surface of the base 403 and the upper surface of the extension groove 404, and the distance b is determined by the cooperation of the photoelectric transmitter 4033 and the photoelectric receiver 5022, and the distance b is greater than the distance a. Specifically, the first locking plate 4037 and the second locking plate 4064 on the left side are obliquely arranged under the influence of the inclined surfaces of the first wedge block 4036 and the second wedge block 4063. When the first locking mechanism in the piston heads 4061 on the left and right sides is unlocked, the electric telescopic rod 407 drives the charging base 403 to move upward, and the first wedge block 4036 on the left side moves upward along the inclined surface of the second wedge block 4063 on the left side as the charging base 403 moves upward and contracts. At the same time, the first wedge block 4064 on the right side is 36 moves upward along the inclined surface of the second wedge block 4063 on the right side. Affected by the supporting force of the electric latch 4035 on the right side, when the first wedge block 4036 on the right side moves upward along the inclined surface of the second wedge block 4063 on the right side, the sliding cooperation of the slider 4071 and the slideway 4038 causes the charging base 403 to move horizontally to the right. When the photoelectric transmitter 4033 is in correspondence with the photoelectric receiver 5022, it indicates that the first contact piece 4032 is in correspondence with the second contact piece 5021 at this time, so that the charging base 403 is in correspondence with the offset connector 502, and the adaptive adjustment of the charging base 403 is completed, so as to prevent the problem of poor contact and heating caused by the failure of the machine head 502 to be in correspondence with the charging base 403.

[0058] When the photoelectric transmitter 4033 is aligned with the photoelectric receiver 5022 , the distance the charging base 403 moves upward is the height of the distance b.

[0059] Then, the first locking plate 4037 on the left is connected and matched with the lock hole of the second locking plate 4064 through the electromagnetic lock, so that the first locking plate 4037 on the left is connected and fixed with the second locking plate 4064, and the first locking mechanisms in the piston heads 4061 on the left and right sides are closed and disconnected, and the electric telescopic rod 407 continues to drive the charging base 403 to move upward to the top. At this time, the first contact piece 4032 and the second contact piece 5021 are in correspondence and tightly fit, so that the charging base 403 and the offset connector 502 are in correspondence with each other for charging.

[0060] In addition, since dust and other impurities may accumulate inside the charging slot 4031 during use, the impurities may cover the first contact sheet 4032, resulting in poor contact between the first contact sheet 4032 and the second contact sheet 5021 after being attached, resulting in low charging efficiency and charging interruption. The following improvements are made to this end:

[0061] First, the valve 4053 is in a closed state. The first locking plate 4037 and the second locking plate 4064 are locked in cooperation with the electromagnetic lock and the lock hole. The first locking mechanism in the piston head 4061 is kept in a closed and disconnected state. The electric latch 4035 is kept in a locked and fixed state. When the electric telescopic rod 407 drives the charging base 403 to move upward and dock with the lower surface of the connector 502, the pressure in the expansion member 405 will be further increased to complete the further inflation of the expansion member 405. If the lower surface of the charging slot 4031 is covered with dust and other impurities, the presence of the impurities makes the photoelectric receiver 5022 unable to receive light signals of sufficient intensity. At this time, it is determined that dust and other impurities are covering the photoelectric transmitter 4033 and the first contact piece 4032. In this regard, when the electric telescopic rod 407 drives the charging base 403 to move upward to the top, the valve 4053 is opened to allow the gas in the expansion member 405 to be quickly blown into the charging slot 4031 through the jet pipe 4051, so as to achieve the effect of blowing away dust and impurities on the photoelectric transmitter 4033 and the first contact piece 4032 in the charging slot 4031. If the electric telescopic rod 407 drives the charging base 403 to move upward to the top, but the photoelectric receiver 5022 still cannot receive a light signal of sufficient intensity, the valve 4053 remains in the open state, the first locking plate 4037 and the second locking plate 4064 remain in the locked state under the cooperation of the electromagnetic lock and the lock hole, and the first locking mechanism in the piston head 4061 remains in the closed and disconnected state, and the electric The latch 4035 remains locked and fixed, and then the electric telescopic rod 407 controls the charging base 403 to keep the charging base 403 from moving upward to the top position. At this time, there is a gap between the charging slot 4031 and the lower surface of the joint 502, and a gap is reserved between the joint 502 and the charging slot 4031. Then, the charging base 403 is driven downward by the electric telescopic rod 407 to move a certain distance, and then the electric telescopic rod 407 quickly drives the charging base 403 to move upward by the same distance. At this time, the joint 502 and the U-shaped plate 402 squeeze the expansion member 405 to reduce the internal volume of the expansion member 405, so that the gas entering the expansion member 405 can be discharged faster through the jet pipe 4051. When moving downward, the support of the push rod 4062 causes the piston head 4061 to move downward synchronously, and the gas is replenished into the expansion piece 405 and the air inlet pipe 406 from the air jet pipe 4051. When the electric telescopic rod 407 quickly drives the charging base 403 to move upward, the piston head 4061 moves upward synchronously, and the gas in the air inlet pipe 406 and the expansion piece 405 is squeezed out through the air jet pipe 4051. The electric telescopic rod 407 drives the charging base 403 to move upward intermittently and quickly, so that the gas in the air inlet pipe 406 and the expansion piece 405 is intermittently discharged from the air jet pipe 4051, and repeatedly acts on the gap between the charging slot 4031 and the joint 502. The intermittent airflow frequently enters the gap and acts on the lower surface of the joint 502.In order to speed up the cleaning efficiency of dust and impurities on the lower surface of the connector 502, when the photoelectric receiver 5022 receives a light signal of sufficient intensity, it indicates that the dust and other impurities between the charging slot 4031 and the connector 502 have been completely cleared, ensuring the stability of the first contact piece 4032 and the second contact piece 5021 when docking and charging. Then the electric telescopic rod 407 drives the charging base 403 to move up to the top, and the charging base 403 cooperates with the connector 502 to charge the battery in the energy storage charging box 501.

[0062] During the docking and charging process between the first contact piece 4032 and the second contact piece 5021, the connector 502 needs to remain docked with the charging slot 4031 for a long time. Due to the resistance thermal effect of the current passing through the connector 502 and other reasons, the temperature near the connector 502 will become higher and higher. The excessively high temperature will accelerate the aging of nearby electrical components and the degradation of material properties. Further temperature rise will also cause greater safety problems. For this reason, a temperature sensor is provided in the extension slot 404 or on the expansion piece 405. The temperature of the connector 502 is detected by the temperature sensor. At the same time, a second locking mechanism is provided on the top of the slider 4071. The second locking mechanism is used to lock the slider 4071 in the slideway 4038 to maintain the stability of the connection between the charging base 403 and the connector 502. When the temperature sensor When the sensor detects that the temperature of the joint 502 has reached a preset safety temperature threshold, the first locking mechanism in the piston head 4061 is closed and disconnected, the valve 4053 is opened, the electromagnetic lock on the first locking plate 4037 is disconnected from the lock hole on the second locking plate 4064, and the electromagnetic lock remains in a retracted state, the inclined surface of the second locking plate 4064 is kept flat with the inclined surface of the first locking plate 4037, the electromagnet on the first locking plate 4037 is powered off and disconnected from the second locking plate 4064, the second locking mechanism is opened to fix the slider 4071 in the slideway 4038, and then the two sets of electric latches 4035 respectively drive the two first wedge blocks 4036 to move inward, and with the cooperation of the inclined surfaces of the first wedge block 4036 and the second wedge block 4063, as the first wedge block 4036 and the second wedge block 4063 move inward, the two first wedge blocks 4036 and the second wedge block 4063 move inward. The inward movement of the wedge block 4036 causes the piston head 4061 to move upward along the intake pipe 406 under the support of the push rod 4062, and at the same time, the gas in the expansion member 405 is discharged outward through the jet pipe 4051. It should be noted that when the electric latch 4035 drives the first wedge block 4036 to move horizontally, the electromagnet always keeps corresponding to the second locking plate 4064. When the electric latch 4035 drives the first wedge block 4036 to contract, the electromagnet is energized, and the electromagnet attracts the second locking plate 4064 to cause the piston head 4061 to move downward from the intake pipe 406, that is, when the first wedge block 4036 moves inward, the electromagnet remains disconnected, and the second wedge block 4063 moves upward under the drive of the first wedge block 4036. When the latch 4035 drives the first wedge block 4036 to contract, the electromagnet is started and energized, and the second wedge block 4063 moves downward through the magnetic attraction of the electromagnet and the second locking plate 4064, wherein, when the piston head 4061 moves downward, external gas will be replenished into the expansion piece 405 and the air intake pipe 406 through the jet pipe 4051, and as the electric latch 4035 drives the first wedge block 4036 to move inward again, the second wedge block 4063, under the push of the first wedge block 4036, causes the piston head 4061 to move upward along the air intake pipe 406 again, and the gas in the air intake pipe 406 and the expansion piece 405 is discharged to the outside, so as to enhance the fluidity of the airflow near the connector 502 during the docking and charging process between the connector 502 and the charging base 403,The purpose is to improve the heat dissipation efficiency near the butt joint 502.

[0063] A power supply method for an energy storage charging device in a crane power supply system, the power supply method using an energy storage charging device in the crane power supply system to supply power, comprising the following steps:

[0064] S1, 380V50Hz AC power is supplied from the workshop power distribution room to the switch cabinet 2 through the ground cable 6, and then supplied to the charging position along the cable 3. The charging position does not cause movement interference to the crane body 5 when the crane body 5 is operating normally. The charging position charges the battery in the energy storage charging box 501 during the trough period;

[0065] S2, when the crane body 5 is in normal operation, the battery in the energy storage charging box 501 transmits direct current to the motor controller of the crane body 5, and then transmits it to the motor after conversion;

[0066] S3. When the energy storage charging box 501 is charged, it is charged after being docked with the charging position through the connector 502, and the battery management system monitors the charging status of the battery.

[0067] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An energy storage charging device in a crane power supply system, comprising a rail-supporting beam (1) and a crane body (5), wherein a charging position is provided on the inner side of the rail-supporting beam (1), Features: An energy storage and charging box (501) is provided on one side of the crane body (5), and a joint (502) is provided at the bottom of the energy storage and charging box (501); The charging station comprises a U-shaped plate (402) and a charging base (403); an electric telescopic rod (407) is provided on the inner lower surface of the U-shaped plate (402); a photoelectric transmitter (4033) is provided on the top of the charging base (403); and a photoelectric receiver (5022) is provided on the bottom of the connector (502); An extension groove (404) is provided in the middle of the U-shaped plate (402), slide grooves (4034) are provided on both sides of the charging base (403), an electric bolt (4035) is provided on one side of the slide groove (4034), an expansion piece (405) is provided on the top of the U-shaped plate (402), an air pressure sensor (4052) is provided inside the expansion piece (405), an air jet pipe (4051) is provided at the bottom of the expansion piece (405), an air intake pipe (406) is provided on the top of the U-shaped plate (402), a piston head (4061) is movably connected inside the air intake pipe (406), a first locking mechanism is provided inside the piston head (4061), a push rod (4062) is movably connected to one end of the piston head (4061) away from the expansion piece (405), and a connecting component is provided between the push rod (4062) and the telescopic end of the electric bolt (4035).

2. The energy storage charging device in the crane power supply system according to claim 1, Features: A support frame (401) is provided at the bottom of the U-shaped plate (402); one end of the support frame (401) away from the U-shaped plate (402) is fixedly connected to a fixing plate (4); a cable (3) is provided inside the support frame (401); one end of the cable (3) away from the support frame (401) passes through the bottom of the track-bearing beam (1) and is connected to a switch cabinet (2); the switch cabinet (2) is a crane switch cabinet; an input end of the switch cabinet (2) is connected to a ground cable (6); one end of the support frame (401) is provided with a fixing plate (4); the support frame (401) is fixedly connected to the inner side of the track-bearing beam (1) via the fixing plate (4); and a battery management system is provided inside the energy storage charging box (501).

3. The energy storage charging device in the crane power supply system according to claim 1, Features: The crane body (5) is movably connected to the top of the track-bearing beam (1), and the crane body (5) comprises a trolley running mechanism, a small trolley running mechanism and a lifting mechanism, and the trolley running mechanism, the small trolley running mechanism and the lifting mechanism are all powered by an energy storage charging box (501).

4. The energy storage charging device in the crane power supply system according to claim 1, Features: The connector (502) is a charging connector. The connector (502) corresponds to the inner side of the U-shaped plate (402). The internal space of the U-shaped plate (402) is larger than the volume of the connector (502). The photoelectric transmitter (4033) corresponds to the photoelectric receiver (5022).

5. The energy storage charging device in the crane power supply system according to claim 1, Features: The bottom end of the jet pipe (4051) is provided with a valve (4053), the bottom end of the jet pipe (4051) corresponds to the bottom of the charging slot (4031), and the bottom end of the jet pipe (4051) is provided with a gas diffuser (4054).

6. The energy storage charging device in the crane power supply system according to claim 1, Features: The charging base (403) is located inside the extension groove (404), the width of the extension groove (404) is greater than that of the charging base (403), a charging groove (4031) is provided in the middle of the charging base (403), a first contact piece (4032) is provided at the bottom of the charging groove (4031), the first contact piece (4032) is electrically connected to the cable (3) in the support frame (401), a second contact piece (5021) is provided at the bottom of the connector (502), the first contact piece (4032) and the second contact piece (5021) are matched with each other, the first locking mechanism is used for locking the piston head in the intake pipe (406), and one end of the intake pipe (406) is connected to the inside of the expansion piece (405).

7. The energy storage charging device in the crane power supply system according to claim 1, Features: The connecting assembly comprises a first wedge block (4036) provided at the telescopic end of the electric bolt (4035) and a second wedge block (4063) at the bottom of the push rod (4062), the second wedge block (4063) correspondingly cooperates with the first wedge block (4036), a locking structure is provided between the first wedge block (4036) and the second wedge block (4063), the locking structure comprises a first locking plate (4037) and a second locking plate (4064), the first The locking plate (4037) is arranged on the inclined surface of the first wedge block (4036), the second locking plate (4064) is arranged on the inclined surface of the second wedge block (4063), electromagnetic locks are arranged at both ends of the first locking plate (4037), the second locking plate (4064) is provided with a lock hole matching the electromagnetic lock, and a plurality of the lock holes are arranged at equal intervals, the second locking plate (4064) is made of magnetic metal material, and an electromagnet is arranged in the middle of the first locking plate (4037).

8. The energy storage charging device in the crane power supply system according to claim 1, Features: The expansion member (405) is located on the inner side of the top of the U-shaped plate (402); the air intake pipe (406) is in an L-shaped structure; the other end of the air intake pipe (406) is located on the top of the extension groove (404); and the push rod (4062) and the charging base (403) are arranged perpendicular to each other; The telescopic end of the electric telescopic rod (407) is slidably connected to the bottom of the charging base (403), the telescopic end of the electric telescopic rod (407) is provided with a slider (4071), the bottom of the charging base (403) is provided with a slideway (4038), and the slider (4071) is slidably connected inside the slideway (4038).

9. A power supply method for an energy storage charging device in a crane power supply system, the power supply method using the energy storage charging device in a crane power supply system according to claim 2 for power supply, It is characterized in that The following steps are involved: S1, 380V 50Hz alternating current is supplied from the workshop power distribution room through the ground cable (6) to the switch cabinet (2), and then supplied along the cable (3) to the charging station. When the crane body (5) is operating normally, the charging station does not cause movement interference to the crane body (5). The charging station charges the battery in the energy storage charging box (501) during the trough period; S2, when the crane body (5) is in normal operation, the battery in the energy storage charging box (501) transmits direct current to the motor controller of the crane body (5), and then transmits it to the motor after conversion; S3. When the energy storage charging box (501) is charged, it is charged after being docked with the charging position through the connector (502), and the battery management system monitors the charging status of the battery.

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