A terminal service device and power transmission method for state grid new energy external power transmission

Abstract

The present invention relates to the technical field of power transmission terminal service equipment, specifically a terminal service equipment and power transmission method for the State Grid's new energy power transmission, comprising: a fuse body, a metal sodium body is arranged on the inner side of the fuse body, and a piston is movably installed on the right side of the metal sodium body; a movable structure is installed on the fuse body, and the movable structure includes a connecting shell, the connecting shell is fixedly installed on the right wall of the fuse body, a connecting rod is fixedly connected to the right wall of the piston, and a movable plate is movably installed on the inner side of the connecting shell. The movable plate provided in the fuse of the present invention can stretch the rubber band, and ratchet teeth and ratchet grooves are provided, so that the ratchet can rotate counterclockwise but cannot rotate clockwise. When the connecting rod is reset, the friction between the ratchet and the rubber band can slow down the speed of resetting the connecting rod, thereby prolonging the piston reset time, avoiding the frequent switching of the device in a short time, and improving the safety of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission terminal service equipment, and specifically to a terminal service equipment and a power transmission method for state-owned new energy power transmission. Background Art

[0002] A fuse uses a metal conductor as a fuse connected in series in a circuit. When an overload or short-circuit current passes through the fuse, it heats up and melts, thereby disconnecting the circuit. Fuses are widely used in State Grid's renewable energy power transmission terminals and electrical equipment. As a short-circuit and overcurrent protector, they are one of the most commonly used protective devices.

[0003] In this regard, China's patent application number: CN202011385074.3 discloses an automatic recovery type power fuse, including a self-resetting fuse body, wherein the self-resetting fuse body is provided with metallic sodium and a piston, one end of the self-resetting fuse body is provided with a cylinder, and the end of the cylinder away from the self-resetting fuse body is provided with an electromagnet, and the electromagnet is provided with a transformer electrically connected to the self-resetting fuse body. In this invention, the push rod can quickly compress the elastic part, and when the metallic sodium cools down and recovers, the elastic part releases the elastic force, the rod body and the guide assembly are connected by an elastic limit plate, and the guide assembly rotates along the guide rail, and it takes a long time to completely reset. Therefore, the self-resetting fuse of this design has the characteristic of delayed conduction, which can avoid the problem of frequent switching of the fuse in a short time under the condition of continuous overcurrent, so that the fuse is not easy to be damaged or even exploded, and the safety of the use of the fuse is improved.

[0004] The fuse can extend the reset time of the piston by providing a guide component that can rotate along the guide rail, avoid frequent switching of the fuse in a short period of time, and improve the safety of the use of the fuse. However, when the circuit is overloaded, when the piston and the push rod in the fuse move to the right, the right end of the elastic limit plate needs to be inserted into the tube body on the right side to extend the time for the piston and the push rod to reset to the left. The tube body is positioned at the right end of the guide rail by the magnetic force of the electromagnet, and the displacement of the tube body due to the shaking of the device cannot be avoided, and the elastic limit plate cannot be accurately inserted into the tube body. There is unreliability in the insertion of the elastic limit plate into the tube body under the action of the push rod, and the separation of the elastic limit plate and the tube body under the magnetic force of the electromagnet is also uncontrollable, which makes the use of the device have great limitations and is difficult to promote.

[0005] Therefore, in order to solve the above problems, a terminal service device and a power transmission method for the State Grid's new energy power transmission are proposed. Summary of the invention

[0006] The object of the present invention is to provide a terminal service device and a power transmission method for the State Grid's new energy power transmission terminal, so as to solve the problem that the fuse of the prior art proposed in the above background technology can extend the time of piston reset by setting a guide component that can rotate along a guide rail, avoid frequent switching of the fuse in a short time, and improve the safety of the fuse. However, when the circuit is overloaded, when the piston and the push rod in the fuse move to the right, the right end of the elastic limit plate needs to be inserted into the tube body on the right side to extend the time when the piston and the push rod are reset to the left, and the tube body is positioned at the right end of the guide rail by the magnetic force of the electromagnet, and the displacement of the tube body due to the shaking of the device cannot be avoided, and the elastic limit plate cannot be accurately inserted into the tube body, and there is unreliability in the insertion of the elastic limit plate into the tube body under the action of the push rod, and the separation of the elastic limit plate and the tube body under the magnetic force of the electromagnet is also uncontrollable, which makes the use of the device have great limitations and is difficult to promote and use.

[0007] To achieve the above object, the present invention provides the following technical solution: a terminal service device for the State Grid's new energy power transmission, comprising: a fuse body, a metal sodium body is arranged inside the fuse body, and a piston is movably installed on the right side of the metal sodium body;

[0008] A movable structure is installed on the fuse body, and the movable structure includes a connecting shell, which is fixedly installed on the right wall of the fuse body, a connecting rod is fixedly connected to the right wall of the piston, a movable plate is movably installed on the inner side of the connecting shell, a through hole is opened in the middle of the surface of the movable plate, four groups of movable sleeves are movably installed on the surface of the movable plate, and a first spring is fixedly connected to the right wall of the movable plate.

[0009] Preferably, a delay structure is installed on the inner side of the movable structure, and the delay structure includes a fixed frame, the fixed frame is fixedly connected to the right end surface of the connecting rod, a movable groove is opened at the end of the fixed frame, a rubber band is fixedly connected to the right wall of the fuse body, a movable block is slidably installed on the inner side of the movable groove, a second spring is fixedly connected to the bottom surface of the movable block, a fixed shaft is fixedly connected to the surface of the movable block, a ratchet is rotatably installed on the middle surface of the fixed shaft, a spring sheet is fixedly connected to the middle surface of the fixed shaft, a ratchet is movably installed on the outer side of the middle part of the fixed shaft through a bearing, and a ratchet groove is opened on the inner wall of the ratchet.

[0010] Preferably, the right side of the piston is filled with argon gas, and the inner side of the connecting shell is filled with damping medium.

[0011] Preferably, the connecting rod passes through the right wall of the fuse body, and the right end is located inside the connecting shell. The right side wall of the connecting rod abuts against the left side wall of the movable plate and is aligned with the through hole. A sealing ring is provided between the movable plate and the inner wall of the connecting shell.

[0012] Preferably, the movable sleeve passes through the movable plate, the length of the movable sleeve is greater than the thickness of the movable plate, and one end of the first spring is fixedly connected to the inner wall of the connecting shell.

[0013] Preferably, the right end of the rubber band is fixedly connected to the movable plate, the rubber band passes through the fixed frame via the movable groove, and one end of the second spring is fixedly connected to the inner wall of the movable groove.

[0014] Preferably, the ratchet is stuck in the ratchet groove, the end of the spring plate abuts against the surface of the ratchet, and the ratchet wheel fits against the surface of the rubber band.

[0015] A power transmission method for state grid new energy external power transmission terminal service equipment:

[0016] S1. When the circuit fails or is overloaded, the main body of the metallic sodium vaporizes, expands in volume, and increases in resistance sharply, pushing the piston to move to the right, driving the connecting rod to move inside the connecting shell, and the connecting rod fits the movable plate. The connecting rod pushes the movable plate to move to the right inside the connecting shell. The inner side of the connecting shell is equipped with a damping medium. When the movable plate moves, the movable sleeve moves to the left on the movable plate under the blocking effect of the damping medium, and the damping medium on the right side of the movable plate flows smoothly to the left side through the movable sleeve;

[0017] S2. The movable plate moves to the right, pulling the rubber band, and the connecting rod drives the fixed frame to move to the right. The ratchet is close to the surface of the rubber band, and friction is generated between the ratchet and the rubber band. The ratchet rotates counterclockwise on the surface of the rubber band, and the ratchet moves in the ratchet groove;

[0018] S3. After the fault is eliminated, the gaseous sodium metal body cools down and returns to a solid state. The piston moves to the left under the action of argon gas, driving the connecting rod to move to the left. The connecting rod is separated from the movable plate, the through hole is unblocked, the movable plate loses the contact limit of the connecting rod and moves to the left. The movable sleeve moves to the right on the movable plate under the blocking action of the damping medium. The damping medium on the left side of the movable plate cannot flow to the right side through the movable sleeve. Therefore, the damping medium can only flow on the left and right sides of the movable plate through the through hole.

[0019] S4. The connecting rod drives the fixing frame to move to the left, and the fixing frame moves relative to the rubber band, so the ratchet tends to rotate clockwise, the ratchet teeth are stuck in the ratchet groove, and the ratchet cannot rotate, so friction is generated between the ratchet and the rubber band.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the fuse of the present invention is provided with a movable movable plate that can stretch the rubber band, and with ratchets and ratchet grooves, so that the ratchet can rotate counterclockwise but cannot rotate clockwise. When the connecting rod is reset, the friction between the ratchet and the rubber band can slow down the speed of resetting the connecting rod, thereby extending the reset time of the piston, avoiding frequent switching of the device in a short time, and improving the safety of the device.

[0021] A movable structure and a time-delay structure are provided. When a circuit fails or is overloaded, the main body of the metal sodium vaporizes, expands in volume, and increases in resistance sharply, pushing the piston to move to the right and squeezing the argon gas on the right side of the piston. The piston drives the connecting rod to move inside the connecting shell. The connecting rod fits the left wall of the movable plate and blocks the through hole. The connecting rod pushes the movable plate to move to the right inside the connecting shell. The inner side of the connecting shell is equipped with a damping medium. When the movable plate moves, the movable sleeve moves to the left on the movable plate under the blocking effect of the damping medium. The damping medium on the right side of the movable plate flows smoothly to the left side through the movable sleeve.

[0022] When the movable plate moves to the right, the rubber band can be pulled, so that the rubber band is stretched, and at the same time, the connecting rod drives the fixed frame to move to the right with the movable plate, and the ratchet wheel is in close contact with the surface of the rubber band under the elastic action of the second spring, and in the process of the rubber band being stretched and the fixed frame moving to the right, friction is generated between the ratchet wheel and the rubber band, and the ratchet wheel rotates counterclockwise on the surface of the rubber band, and the ratchet teeth move in the ratchet groove under the elastic action of the spring leaf, so that the ratchet wheel can move to the right end position of the rubber band, and the activity is stable and less affected by the outside world;

[0023] When the fault is eliminated, the gaseous metallic sodium body cools down and returns to a solid state. The piston moves to the left under the action of the argon gas and drives the connecting rod to move to the left. The right end of the connecting rod is separated from the movable plate, the through hole is unblocked, and the movable plate loses the abutment limit of the connecting rod, that is, it moves to the left under the elastic action of the first spring, and the movable sleeve on the movable plate moves to the right on the movable plate under the blocking action of the damping medium. The damping medium on the left side of the movable plate cannot flow to the right side through the movable sleeve. Therefore, the damping medium can only flow through the through hole on the left and right sides of the movable plate, which can slow down the speed of the movable plate moving to the left.

[0024] When the connecting rod moves to the left, it drives the fixing frame to move to the left. The fixing frame moves relative to the rubber band, and the ratchet moves to the left relative to the rubber band. The top surface of the ratchet fits the surface of the rubber band. Therefore, when the fixing frame moves, the ratchet tends to rotate clockwise, and the ratchet teeth are stuck in the ratchet groove under the action of the spring, so the ratchet cannot rotate. Therefore, friction is generated between the ratchet and the rubber band, which can slow down the speed of the connecting rod and the piston moving to the left, thereby extending the piston reset time, avoiding frequent switching of the device in a short time, and improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic front view of the structure of the present invention;

[0026] Figure 2 It is a schematic front cross-sectional view of the structure of the fuse body and the movable structure of the present invention;

[0027] Figure 3 It is a schematic front cross-sectional view of the structure of the connecting shell of the present invention;

[0028] Figure 4 It is a schematic diagram of the left side view of the structure of the movable plate of the present invention;

[0029] Figure 5 It is a schematic front cross-sectional view of the structure of the movable plate of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the movable sleeve of the present invention;

[0031] Figure 7 It is a schematic front cross-sectional view of the structure of the movable groove of the present invention;

[0032] Figure 8 It is a bottom view schematic diagram of the explosion structure of the movable block of the present invention;

[0033] Fig. 9 It is a schematic front cross-sectional view of the structure of the ratchet of the present invention.

[0034] In the figure: 1. fuse body; 11. metallic sodium body; 12. piston; 2. movable structure; 21. connecting shell; 22. connecting rod; 23. movable plate; 24. through hole; 25. movable sleeve; 26. first spring; 3. delay structure; 31. fixing frame; 32. movable groove; 33. rubber band; 34. movable block; 35. second spring; 36. fixed shaft; 37. ratchet; 38. spring leaf; 39. ratchet; 310. ratchet groove. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-9 , an embodiment provided by the present invention:

[0037] The fuse body 1, the metallic sodium body 11 and the piston 12 used in the present application are products that can be directly purchased on the market. Their principles and connection methods are existing technologies well known to those skilled in the art, so they will not be described here in detail.

[0038] A terminal service device for the State Grid's new energy power transmission includes: a fuse body 1, a metal sodium body 11 is arranged inside the fuse body 1, and a piston 12 is movably installed on the right side of the metal sodium body 11;

[0039] A movable structure 2 is installed on the fuse body 1. The movable structure 2 includes a connecting shell 21. The connecting shell 21 is fixedly installed on the right wall of the fuse body 1. A connecting rod 22 is fixedly connected to the right wall of the piston 12. A movable plate 23 is movably installed on the inner side of the connecting shell 21. A through hole 24 is opened in the middle of the surface of the movable plate 23. Four groups of movable sleeves 25 are movably installed on the surface of the movable plate 23. A first spring 26 is fixedly connected to the right wall of the movable plate 23. When the movable plate 23 moves, it can pull the rubber band 33 and cooperate with the ratchet 39 to slow down the speed of the connecting rod 22 when it recovers, so as to avoid frequent switching of the device in a short time and improve the safety of the device.

[0040] Further, a delay structure 3 is installed on the inner side of the movable structure 2, and the delay structure 3 includes a fixing frame 31, the fixing frame 31 is fixedly connected to the right end surface of the connecting rod 22, and a movable groove 32 is opened at the end of the fixing frame 31. A rubber band 33 is fixedly connected to the right wall of the fuse body 1, and a movable block 34 is slidably installed on the inner side of the movable groove 32. The bottom surface of the movable block 34 is fixedly connected to a second spring 35, and the surface of the movable block 34 is fixedly connected to a fixed shaft 36. The middle surface of the fixed shaft 36 is rotatably installed with a ratchet 37, and the middle surface of the fixed shaft 36 is fixedly connected to A spring sheet 38 is connected, and a ratchet 39 is movably installed on the outer middle part of the fixed shaft 36 through a bearing. A ratchet groove 310 is opened on the inner wall of the ratchet 39. The rubber band 33 can be stretched by setting a movable movable plate 23, and ratchet teeth 37 and ratchet grooves 310 are set, so that the ratchet 39 can rotate counterclockwise but cannot rotate clockwise. When the connecting rod 22 is reset, the friction between the ratchet 39 and the rubber band 33 can slow down the resetting speed of the connecting rod 22, thereby extending the resetting time of the piston 12, avoiding frequent switching of the device in a short time, and improving the safety of the device.

[0041] Furthermore, the right side of the piston 12 is filled with argon gas, and the inner side of the connecting shell 21 is filled with a damping medium. The argon gas provides power for the piston 12 to return to the left, and the damping medium cooperates with the through hole 24 to slow down the speed of the movable plate 23 moving to the left and returning to the original position.

[0042] Furthermore, the connecting rod 22 passes through the right wall of the fuse body 1, and the right end is located on the inner side of the connecting shell 21. The right side wall of the connecting rod 22 abuts against the left side wall of the movable plate 23 and is aligned with the through hole 24. A sealing ring is provided between the movable plate 23 and the inner wall of the connecting shell 21. The movement of the connecting rod 22 can push the movable plate 23 to move inside the connecting shell 21, and the damping medium will not flow through the gap between the movable plate 23 and the connecting shell 21.

[0043] Furthermore, the movable sleeve 25 passes through the movable plate 23, the length of the movable sleeve 25 is greater than the thickness of the movable plate 23, one end of the first spring 26 is fixedly connected to the inner wall of the connecting shell 21, and the movable sleeve 25 can allow the damping medium to flow to the left when the movable plate 23 moves to the right. When the movable plate 23 moves to the left, the damping medium cannot flow through the movable sleeve 25, and the first spring 26 provides power for resetting the movable plate 23.

[0044] Furthermore, the right end of the rubber band 33 is fixedly connected to the movable plate 23, the rubber band 33 passes through the fixed frame 31 via the movable groove 32, one end of the second spring 35 is fixedly connected to the inner wall of the movable groove 32, the movable plate 23 stretches the rubber band 33, and the second spring 35 provides power for the ratchet 39 to abut against the rubber band 33.

[0045] Furthermore, the ratchet 37 is stuck in the ratchet groove 310, the end of the spring 38 abuts against the surface of the ratchet 37, the ratchet 39 fits the surface of the rubber band 33, and the ratchet 39 can rotate counterclockwise outside the fixed shaft 36, but cannot rotate clockwise.

[0046] A power transmission method for state grid new energy external power transmission terminal service equipment:

[0047] S1. When the circuit fails or is overloaded, the metallic sodium body 11 vaporizes, expands in volume, and increases in resistance sharply, pushing the piston 12 to move rightward, driving the connecting rod 22 to move inside the connecting shell 21, and the connecting rod 22 fits the movable plate 23. The connecting rod 22 pushes the movable plate 23 to move rightward inside the connecting shell 21. The inner side of the connecting shell 21 is equipped with a damping medium. When the movable plate 23 moves, the movable sleeve 25 moves leftward on the movable plate 23 under the blocking effect of the damping medium, and the damping medium on the right side of the movable plate 23 flows smoothly to the left side through the movable sleeve 25;

[0048] S2. The movable plate 23 moves to the right, pulling the rubber band 33, the connecting rod 22 drives the fixing frame 31 to move to the right, the ratchet 39 is close to the surface of the rubber band 33, friction is generated between the ratchet 39 and the rubber band 33, the ratchet 39 rotates counterclockwise on the surface of the rubber band 33, and the ratchet 37 moves in the ratchet groove 310;

[0049] S3. After the fault is eliminated, the gaseous sodium metal body 11 cools down and returns to a solid state. The piston 12 moves to the left under the action of the argon gas, driving the connecting rod 22 to move to the left. The connecting rod 22 is separated from the movable plate 23, and the through hole 24 is unblocked. The movable plate 23 loses the abutment limit of the connecting rod 22 and moves to the left. The movable sleeve 25 moves to the right on the movable plate 23 under the blocking action of the damping medium. The damping medium on the left side of the movable plate 23 cannot flow to the right side through the movable sleeve 25. Therefore, the damping medium can only flow on the left and right sides of the movable plate 23 through the through hole 24.

[0050] S4. The connecting rod 22 drives the fixing frame 31 to move leftward, and the fixing frame 31 moves relative to the rubber band 33, so that the ratchet 39 tends to rotate clockwise, and the ratchet teeth 37 are stuck in the ratchet groove 310, and the ratchet 39 cannot rotate, so friction is generated between the ratchet 39 and the rubber band 33.

[0051] Working principle: When the circuit fails or is overloaded, the metallic sodium body 11 is vaporized, the volume expands, and the resistance increases sharply, pushing the piston 12 to move to the right and squeezing the argon gas on the right side of the piston 12. The piston 12 drives the connecting rod 22 to move inside the connecting shell 21. The connecting rod 22 fits the left side wall of the movable plate 23 and blocks the through hole 24. The connecting rod 22 pushes the movable plate 23 to move to the right inside the connecting shell 21. The inner side of the connecting shell 21 is equipped with a damping medium. When the movable plate 23 moves, the movable sleeve 25 moves to the left on the movable plate 23 under the blocking effect of the damping medium. The damping medium on the right side of the movable plate 23 flows smoothly to the left side through the movable sleeve 25.

[0052] When the movable plate 23 moves to the right, the rubber band 33 can be pulled, so that the rubber band 33 is stretched, and at the same time, the connecting rod 22 drives the fixing frame 31 to move to the right along with the movable plate 23, and the ratchet 39 is in close contact with the surface of the rubber band 33 under the elastic action of the second spring 35, and in the process of the rubber band 33 being stretched and the fixing frame 31 moving to the right, friction is generated between the ratchet 39 and the rubber band 33, and the ratchet 39 rotates counterclockwise on the surface of the rubber band 33, and the ratchet teeth 37 move in the ratchet groove 310 under the elastic action of the spring leaf 38, so that the ratchet 39 can move to the right end position of the rubber band 33, and the activity is stable and less affected by the outside world;

[0053] When the fault is eliminated, the gaseous metallic sodium body 11 cools down and returns to a solid state, the piston 12 moves to the left under the action of the argon gas, and drives the connecting rod 22 to move to the left, the right end of the connecting rod 22 is separated from the movable plate 23, the through hole 24 is unblocked, and the movable plate 23 loses the abutment limit of the connecting rod 22, that is, it will move to the left under the elastic action of the first spring 26, and the movable sleeve 25 on the movable plate 23 moves to the right on the movable plate 23 under the blocking action of the damping medium, the damping medium on the left side of the movable plate 23 cannot flow to the right side through the movable sleeve 25, so the damping medium can only flow through the through hole 24 on the left and right sides of the movable plate 23, which can slow down the speed of the movable plate 23 moving to the left;

[0054] When the connecting rod 22 moves to the left, it drives the fixing frame 31 to move to the left. The fixing frame 31 moves relative to the rubber band 33, and the ratchet 39 moves to the left relative to the rubber band 33. The top surface of the ratchet 39 fits the surface of the rubber band 33. Therefore, when the fixing frame 31 moves, the ratchet 39 tends to rotate clockwise, and the ratchet teeth 37 are stuck in the ratchet groove 310 under the action of the spring 38, so the ratchet 39 cannot rotate. Therefore, friction is generated between the ratchet 39 and the rubber band 33, which can slow down the speed of the connecting rod 22 and the piston 12 moving to the left, thereby extending the reset time of the piston 12, avoiding frequent switching of the device in a short time, and improving the safety of the device.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A terminal service device for state grid new energy power transmission, comprising: A fuse body (1), wherein a metal sodium body (11) is arranged inside the fuse body (1), and a piston (12) is movably mounted on the right side of the metal sodium body (11); Features: A movable structure (2) is mounted on the fuse body (1), the movable structure (2) comprising a connecting shell (21), the connecting shell (21) being fixedly mounted on the right wall of the fuse body (1), a connecting rod (22) being fixedly connected to the right wall of the piston (12), a movable plate (23) being movably mounted on the inner side of the connecting shell (21), a through hole (24) being provided in the middle of the surface of the movable plate (23), four sets of movable sleeves (25) being movably mounted on the surface of the movable plate (23), and a first spring (26) being fixedly connected to the right wall of the movable plate (23); A delay structure (3) is installed on the inner side of the movable structure (2), and the delay structure (3) comprises a fixing frame (31), the fixing frame (31) is fixedly connected to the right end surface of the connecting rod (22), and a movable groove (32) is provided at the end of the fixing frame (31), a rubber band (33) is fixedly connected to the right wall of the fuse body (1), a movable block (34) is slidably installed on the inner side of the movable groove (32), a second spring (35) is fixedly connected to the bottom surface of the movable block (34), a fixed shaft (36) is fixedly connected to the surface of the movable block (34), and a ratchet (37) is rotatably installed on the middle surface of the fixed shaft (36), A leaf spring (38) is fixedly connected to the middle surface of the fixed shaft (36), a ratchet (39) is movably mounted on the outer middle side of the fixed shaft (36) via a bearing, a ratchet groove (310) is provided on the inner wall of the ratchet (39), the right end of the rubber band (33) is fixedly connected to the movable plate (23), the rubber band (33) passes through the fixed frame (31) via the movable groove (32), one end of the second spring (35) is fixedly connected to the inner wall of the movable groove (32), the ratchet (37) is stuck in the ratchet groove (310), the end of the leaf spring (38) is in contact with the surface of the ratchet (37), and the ratchet (39) is in contact with the surface of the rubber band (33).

2. According to claim 1, a terminal service device for state grid new energy power transmission is characterized in that: The right side of the piston (12) is filled with argon gas, and the inner side of the connecting shell (21) is filled with damping medium.

3. According to claim 1, a terminal service device for state grid new energy power transmission is characterized in that: The connecting rod (22) passes through the right wall of the fuse body (1), and the right end is located inside the connecting shell (21). The right side wall of the connecting rod (22) abuts against the left side wall of the movable plate (23) and is aligned with the through hole (24). A sealing ring is provided between the movable plate (23) and the inner wall of the connecting shell (21).

4. According to claim 1, a terminal service device for state grid new energy power transmission is characterized in that: The movable sleeve (25) passes through the movable plate (23); the length of the movable sleeve (25) is greater than the thickness of the movable plate (23); and one end of the first spring (26) is fixedly connected to the inner wall of the connecting shell (21).

5. A power transmission method for a terminal service device for transmitting power externally from a new energy source of a State Grid according to any one of claims 1 to 4, characterized in that: S1. When a circuit fails or is overloaded, the metallic sodium body (11) vaporizes, expands in volume, and increases in resistance sharply, pushing the piston (12) to move rightward, driving the connecting rod (22) to move inside the connecting shell (21), and the connecting rod (22) fits the movable plate (23). The connecting rod (22) pushes the movable plate (23) to move rightward inside the connecting shell (21). The connecting shell (21) is provided with a damping medium. When the movable plate (23) moves, the movable sleeve (25) moves leftward on the movable plate (23) under the blocking effect of the damping medium. The damping medium on the right side of the movable plate (23) flows smoothly to the left side through the movable sleeve (25); S2. The movable plate (23) moves to the right, pulling the rubber band (33), the connecting rod (22) drives the fixed frame (31) to move to the right, the ratchet (39) is close to the surface of the rubber band (33), friction is generated between the ratchet (39) and the rubber band (33), the ratchet (39) rotates counterclockwise on the surface of the rubber band (33), and the ratchet (37) moves in the ratchet groove (310); S3. After the fault is eliminated, the gaseous metallic sodium body (11) cools down and returns to a solid state. The piston (12) moves to the left under the action of the argon gas, driving the connecting rod (22) to move to the left. The connecting rod (22) is separated from the movable plate (23). The through hole (24) is unblocked. The movable plate (23) loses the contact limit of the connecting rod (22) and moves to the left. The movable sleeve (25) moves to the right on the movable plate (23) under the blocking action of the damping medium. The damping medium on the left side of the movable plate (23) cannot flow to the right side through the movable sleeve (25). Therefore, the damping medium can only flow on the left and right sides of the movable plate (23) through the through hole (24); S4. The connecting rod (22) drives the fixing frame (31) to move to the left, and the fixing frame (31) moves relative to the rubber band (33), so that the ratchet (39) tends to rotate clockwise, and the ratchet teeth (37) are stuck in the ratchet groove (310), and the ratchet (39) cannot rotate, so friction is generated between the ratchet (39) and the rubber band (33).

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