A protection device and method for preventing closing and locking of marine electrical equipment

Abstract

The present invention discloses a protection device for preventing closing and locking of ship electrical equipment. The device includes a locking and fixing device, a locking sliding device, a locking bolt, and a locking bottom plate. The locking and fixing device includes a fixing structure and a flipping protection cover. The flipping protection cover is hingedly connected to the fixing structure, and the flipping protection cover rotates and covers above the specified structure. The locking bottom plate is installed in the card slot above the distribution board. The lower end of the locking sliding device is connected to the locking bottom plate, and the upper end of the locking sliding device is installed in the fixing structure. The fixing structure and the locking sliding device are fixedly connected by a locking bolt. The present invention also relates to a method for preventing closing and locking of ship electrical equipment. By installing a closing and locking protection device on the distribution board, the knife switch is in an open state and the position of the knife switch is locked, which improves the safety of ship electrical equipment maintenance and avoids the occurrence of personnel safety accidents.

Description

Technical Field

[0001] The present invention belongs to the technical field of shipbuilding, and particularly relates to a protection device and method for preventing closing and locking of ship electrical equipment. Background Art

[0002] At present, the power of marine equipment is mainly driven by electricity. Generally, for marine equipment, especially equipment with relatively large power consumption, the main power supply control of electric drive is basically concentrated on the main switchboard or the sectional switchboard. Generally, after the external wiring of marine equipment is completed, the equipment needs to be commissioned to ensure normal operation in normal times; before the equipment commissioning and trial operation, the service provider must check the internal wiring of the equipment body, and at the same time check the external power supply line and control line of the shipyard to avoid problems in equipment operation caused by wiring problems, resulting in equipment damage or damage to components and lines.

[0003] In reality, when checking the wiring and equipment by equipment service providers or shipyard workers, due to safety considerations, the switch must be tripped and power cut off. However, due to the large number of construction workers on the ship, the work is messy, the division of labor is different and there is a lack of communication with each other. Therefore, occasionally, someone will accidentally send electricity during wiring inspection or equipment disassembly and inspection, causing safety accidents and potential safety hazards. Usually, the method adopted by the shipyard in the face of this situation is to hang a warning sign of "Do not close switch", but sometimes the warning sign is often removed by irrelevant personnel at the scene or borrowed to other places, and even some warning signs fall off automatically, causing misoperation and construction risks; or send a special person to be on duty in the centralized control room. However, due to the complex situation on the ship, the warning sign may be moved away or dropped by others, and the special person in charge leaves temporarily due to other matters, resulting in other operators unauthorizedly closing the switch and sending electricity for equipment operation, leading to safety accidents. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies existing in the above-mentioned prior art, and provide a protection device and method for preventing closing and locking of ship electrical equipment. The device and method of the present invention install a closing and locking protection device on the switchboard to keep the knife switch in the off state and lock the position of the knife switch, improving the safety of ship electrical equipment maintenance and avoiding the occurrence of personal safety accidents.

[0005] In order to achieve the above-mentioned invention purpose, the technical solution provided by the present invention patent is as follows:

[0006] A closing-lock prevention protection device for marine electrical equipment. There is a switchboard installed on the marine electrical equipment, and a knife switch is arranged on the switchboard. There is a card slot above the switchboard. This device includes a locking and fixing device, a locking sliding device, a locking bolt, and a locking bottom plate. The locking and fixing device includes a fixing structure and a flipping protection cover. The flipping protection cover is hinged to the fixing structure and rotates to cover above the fixing structure. The locking bottom plate is installed in the card slot above the switchboard. The lower end of the locking sliding device is connected to the locking bottom plate, and the upper end of the locking sliding device is installed in the fixing structure. The fixing structure and the locking sliding device are fixedly connected by the locking bolt. There is a fixing hole in the middle of the side of the locking sliding device. When the knife switch is off, the knife switch extends into the fixing hole on the locking sliding device. When the locking bolt is screwed into the locking sliding device, the bottom end of the locking bolt fixes the knife switch.

[0007] The above-mentioned locking bottom plate is integrally in a groove shape. There is a bottom plate buckle on the upper left side of the locking bottom plate, and a bottom plate card slot on the right side of the locking bottom plate below the bottom plate buckle. There is a square hole in the middle of the locking bottom plate, and two round holes are arranged at the lower end of the locking bottom plate. The bottom plate buckle at the upper end of the locking bottom plate is embedded in the card slot above the switchboard. When the knife switch is off, the knife extends out from the square hole in the middle of the locking backing plate.

[0008] The above-mentioned fixing structure is integrally in a cuboid shape. There is a fixing buckle on one side of one end of the fixing structure, a lock ring is arranged at the other end of the fixing structure, a sliding through hole is arranged in the middle of the fixing structure, an insertion hole is arranged at the upper end of the sliding through hole, and the inner diameter of the insertion hole is smaller than the inner diameter of the sliding through hole. The lower end of the fixing structure with the lock ring is hinged to the flipping protection cover.

[0009] The above-mentioned flipping protection cover is integrally in an L shape. There is a lock ring groove on the end face of the flipping protection cover hinged to the fixing structure. When the flipping protection cover rotates to cover above the fixing structure, the lock ring extends out from the lock ring groove, and a padlock is installed on the lock ring.

[0010] The above-mentioned locking sliding device is integrally in a cuboid shape. There is an internal thread hole at the upper end of the locking sliding device, a square hole is arranged in the middle of the locking sliding device, a metal plate is arranged at the lower end of the square hole in the middle of the locking sliding device, the metal plate is serrated, an inclination structure is arranged at the lower end of the locking sliding device, two round holes are arranged on the end face of the inclination structure, and the inclination structure is integrally formed with the locking sliding device. The upper end of the locking sliding device is inserted into the sliding through hole in the locking device, and the locking bolt is inserted through the insertion hole on the fixing structure to fix the fixing structure and the locking sliding device.

[0011] The above-mentioned locking bolt is provided with an external thread, and the external thread on the locking bolt matches the internal thread on the locking sliding device.

[0012] The round hole on the inclined angle structure below the above-mentioned locking sliding device is aligned with the round hole at the lower end of the locking bottom plate, and the locking sliding device is fixed to the locking bottom plate through a fixing bolt. When the locking sliding device is fixed to the locking bottom plate, the square hole in the locking sliding device is aligned with the square hole in the locking bottom plate.

[0013] A method for preventing closing locking protection of ship electrical equipment, which specifically includes the following steps:

[0014] In the first step, prepare a device for preventing closing locking protection of ship electrical equipment. This device includes a locking fixing device, a locking sliding device, a locking bolt, and a locking bottom plate. The locking fixing device includes a fixing structure and a flipping protection cover. The flipping protection cover is hingedly connected to the fixing structure, and the flipping protection cover rotates to cover above the specified structure; the locking bottom plate is installed in the card slot above the distribution board, the lower end of the locking sliding device is connected to the locking bottom plate, the upper end of the locking sliding device is installed in the fixing structure, and the fixing structure and the locking sliding device are fixedly connected through a locking bolt; a fixing hole is provided in the middle of the side of the locking sliding device. When the knife switch is off, the knife switch extends into the fixing hole on the locking sliding device. When the locking bolt is screwed into the locking sliding device, the bottom end of the locking bolt fixes the knife switch.

[0015] In the second step, keep the knife switch on the distribution board in the off state, insert the upper end of the locking sliding device into the sliding through hole in the locking device, insert the locking bolt through the insertion hole in the fixing structure, and screw the locking bolt into the internal thread hole in the locking sliding device to fix the fixing structure and the locking sliding device.

[0016] In the third step, insert the fixing buckle on one side of the locking device into the bottom plate card slot at the upper end of the locking bottom plate to fixedly connect the locking device and the locking bottom plate. Then, embed the bottom plate buckle at the upper end of the locking bottom plate into the card slot above the distribution board to fix the locking bottom plate and the distribution board, and the locking bottom plate fits with the distribution board.

[0017] In the fourth step, when the locking bottom plate is fixed on the distribution board, the knife switch extends out from the square hole in the locking sliding device; screw the locking bolt so that the bottom end of the locking bolt presses on the knife switch and makes the knife switch move downward to the metal plate in the locking sliding device, and the locking bolt presses the knife switch tightly on the metal plate.

[0018] Step 5: When the knife switch is pressed against the metal plate, rotate the flip protection cover so that it covers the locking device, and install a padlock on the lock ring to fix the flip protection cover above the locking device. Then, the operator can conduct circuit inspection and maintenance on the electrical equipment.

[0019] Step 6: After the circuit inspection and maintenance of the electrical equipment are completed, remove the anti-closing locking protection device for marine electrical equipment from the distribution board, close the knife switch to make the electrical equipment operate normally, and complete the operation of preventing the closing of the marine electrical equipment.

[0020] Based on the above technical solutions, the following technical advantages have been achieved through practical application of the invention patent for an anti-closing locking protection device and method for marine electrical equipment:

[0021] 1. The anti-closing locking protection device for marine electrical equipment of the present invention fixes the knife switch in the open position through fixing bolts while fixing the locking device and the locking sliding device, and installs a padlock in the lock ring, avoiding the problem of the operator accidentally closing the knife switch and improving the safety of personnel circuit maintenance.

[0022] 2. The anti-closing locking protection device for marine electrical equipment of the present invention installs the closing locking protection device on the distribution board to keep the knife switch in the open position and lock the position of the knife switch, improving the safety of the maintenance of marine electrical equipment and avoiding the occurrence of personnel safety accidents.

[0023] 3. The anti-closing locking protection device for marine electrical equipment of the present invention locks the knife switch through the anti-closing locking protection device, eliminating the need for a dedicated person to watch the knife switch and reducing labor costs. Description of the Drawings

[0024] Figure 1 is the front view of the installation of the anti-closing locking protection device in the anti-closing locking protection device for marine electrical equipment of the present invention.

[0025] Figure 2 is the side view of the installation of the anti-closing locking protection device in the anti-closing locking protection device for marine electrical equipment of the present invention.

[0026] Figure 3 is the front view of the anti-closing locking protection device in the anti-closing locking protection device for marine electrical equipment of the present invention locking the knife switch.

[0027] Figure 4 is the side view of the anti-closing locking protection device in the anti-closing locking protection device for marine electrical equipment of the present invention locking the knife switch.

[0028] Figure 5It is the structural diagram of the locking device in a closing locking protection device for marine electrical equipment according to the present invention.

[0029] Figure 6 It is the front view of the locking sliding device in a closing locking protection device for marine electrical equipment according to the present invention.

[0030] Figure 7 It is the side view of the locking sliding device in a closing locking protection device for marine electrical equipment according to the present invention.

[0031] Figure 8 It is the front view of the locking base plate in a closing locking protection device for marine electrical equipment according to the present invention. Specific embodiments

[0032] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be described below through specific examples shown in the drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0033] As Figure 1-8 described, a closing locking protection device for marine electrical equipment, a switchboard 1 is provided on the marine electrical equipment, a knife switch 11 is provided on the switchboard 1, a card slot 12 is provided above the switchboard 1, the device includes a locking fixing device 2, a locking sliding device 3, a locking bolt 4 and a locking base plate 5, the locking fixing device 2 includes a fixing structure 26 and a flipping protection cover 21, the flipping protection cover 21 is hingedly connected to the fixing structure 26, and the flipping protection cover 21 rotates to cover above the specified structure; the locking base plate 5 is installed in the card slot 12 above the switchboard 1, the lower end of the locking sliding device 3 is connected to the locking base plate 5, the upper end of the locking sliding device 3 is installed in the fixing structure 26, and the fixing structure 26 and the locking sliding device 3 are fixedly connected by the locking bolt 4; a fixing hole is provided in the middle of the side surface of the locking sliding device 3, when the knife switch 11 is turned off, the knife switch 11 extends into the fixing hole on the locking sliding device 3, and when the locking bolt 4 is screwed into the locking sliding device 3, the bottom end of the locking bolt 4 fixes the knife switch 11; installing a closing locking protection device on the switchboard 1 makes the knife switch 11 in an off state and locks the position of the knife switch 11, improving the safety of the maintenance of marine electrical equipment and avoiding the occurrence of personal safety accidents.

[0034] The above-mentioned locking base plate 5 is integrally in a groove shape. On the left side of the upper end of the locking base plate 5, there is a base plate buckle 51. On the right side of the locking base plate 5 below the base plate buckle 51, there is a base plate slot 52. In the middle of the locking base plate 5, there is a square hole 53. At the lower end of the locking base plate 5, there are two round holes 34. The base plate buckle 51 at the upper end of the locking base plate 5 is embedded in the slot 12 above the distribution board 1. When the knife switch 11 is turned off, the knife 11 extends out from the square hole 53 in the middle of the locking backing plate.

[0035] The above-mentioned fixing structure 26 is integrally in a cuboid shape. On one side of one end of the fixing structure 26, there is a fixing buckle 24. At the other end of the fixing structure 26, there is a lock ring 25. In the middle of the fixing structure 26, there is a sliding through hole 22. At the upper end of the sliding through hole 22, there is an insertion hole 23. The inner diameter of the insertion hole 23 is smaller than the inner diameter of the sliding through hole 22. The lower end of the fixing structure 26 with the lock ring 25 is hinged to the flip protection cover 21.

[0036] The above-mentioned flip protection cover 21 is integrally in an L shape. On the end face of the flip protection cover 21 hinged to the fixing structure 26, there is a lock ring groove. When the flip protection cover 21 rotates and covers above the specified structure, the lock ring 25 extends out from the lock ring groove, and a padlock 6 is installed on the lock ring 25.

[0037] The above-mentioned locking sliding device 3 is integrally in a cuboid shape. At the upper end of the locking sliding device 3, there is an internal thread hole 31. In the middle of the locking sliding device 3, there is a square hole 32. At the lower end of the square hole 32 in the middle of the locking sliding device 3, there is a metal plate 33. The metal plate 33 is serrated. At the lower end of the locking sliding device 3, there is an inclination structure. On the end face of the inclination structure, there are two round holes 34. The inclination structure and the locking sliding device 3 are integrally formed. The upper end of the locking sliding device 3 is inserted into the sliding through hole 22 in the locking device, and the locking bolt 4 is inserted through the insertion hole 23 on the fixing structure 26 to fix the fixing structure 26 and the locking sliding device 3.

[0038] The above-mentioned locking bolt 4 is provided with an external thread, and the external thread on the locking bolt 4 matches the internal thread on the locking sliding device 3. The fixing bolt fixes the knife switch 11 while disconnecting and fixes the locking device and the locking sliding device 3. Installing a padlock 6 in the lock ring 25 avoids the problem that the operator accidentally closes the knife switch 11 and improves the safety of personnel for circuit maintenance.

[0039] The round hole 34 on the inclined structure below the above-mentioned locking sliding device 3 is aligned with the round hole 34 at the lower end of the locking bottom plate 5, and the locking sliding device 3 and the locking bottom plate 5 are fixed by fixing bolts. When the locking sliding device 3 is fixed to the locking bottom plate 5, the square hole 32 in the locking sliding device 3 is aligned with the square hole 53 in the locking bottom plate 5.

[0040] A method for preventing closing locking protection of ship electrical equipment, which specifically includes the following steps:

[0041] First step, prepare a device for preventing closing locking protection of ship electrical equipment. This device includes a locking fixing device 2, a locking sliding device 3, a locking bolt 4, and a locking bottom plate 5. The locking fixing device 2 includes a fixing structure 26 and a flipping protection cover 21. The flipping protection cover 21 is hinged to the fixing structure 26, and the flipping protection cover 21 rotates to cover above the specified structure. The locking bottom plate 5 is installed in the upper slot 12 of the distribution board 1. The lower end of the locking sliding device 3 is connected to the locking bottom plate 5, and the upper end of the locking sliding device 3 is installed in the fixing structure 26. The fixing structure 26 and the locking sliding device 3 are fixedly connected by a locking bolt 4. A fixing hole is provided in the middle of the side of the locking sliding device 3. When the knife switch 11 is turned off, the knife switch 11 extends into the fixing hole on the locking sliding device 3. When the locking bolt 4 is screwed into the locking sliding device 3, the bottom end of the locking bolt 4 fixes the knife switch 11.

[0042] Second step, keep the knife switch 11 on the distribution board 1 in the off state. Insert the upper end of the locking sliding device 3 into the sliding through hole 22 in the locking device. The locking bolt 4 is inserted through the insertion hole 23 on the fixing structure 26 and screwed into the internal thread hole 31 in the locking sliding device 3 to fix the fixing structure 26 and the locking sliding device 3.

[0043] Third step, insert the fixing buckle 24 on one side of the locking device into the bottom plate slot 52 at the upper end of the locking bottom plate 5 to fixedly connect the locking device and the locking bottom plate 5. Then, embed the bottom plate buckle 51 at the upper end of the locking bottom plate 5 into the slot 12 above the distribution board 1 to fix the locking bottom plate 5 and the distribution board 1, and the locking bottom plate 5 is attached to the distribution board 1.

[0044] Fourth step, when the locking base plate 5 is fixed on the distribution board 1, the knife switch 11 extends out from the square hole 32 in the locking sliding device 3; screw the locking bolt 4 so that the bottom end of the locking bolt 4 presses on the knife switch 11 and makes the knife switch 11 move downward to the metal plate 33 in the locking sliding device 3, and the locking bolt 4 presses the knife switch 11 tightly on the metal plate 33; lock the knife switch 11 through the anti-closing locking protection device for the ship electrical equipment, eliminating the need for a dedicated person to watch the knife switch 11 and reducing labor costs;

[0045] Fifth step, when the knife switch 11 is pressed tightly on the metal plate 33, rotate the flip protection cover 21 so that the flip protection cover 21 covers the locking device, and install the padlock 6 on the lock ring 25 to fix the flip protection cover 21 above the locking device, and the operator can conduct circuit inspection and maintenance of the electrical equipment;

[0046] Sixth step, after the circuit inspection and maintenance of the electrical equipment are completed, remove the anti-closing locking protection device for the ship electrical equipment from the distribution board 1, close the knife switch 11 to make the electrical equipment operate normally, and complete the operation of preventing the closing of the ship electrical equipment.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the invention or make equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A closing locking protection device for marine electrical equipment. A switchboard (1) is provided on the marine electrical equipment, and a knife switch (11) is provided on the switchboard (1). A card slot (12) is provided above the switchboard (1). It is characterized in that, The device includes a locking and fixing device (2), a locking and sliding device (3), a locking bolt (4) and a locking base plate (5). The locking and fixing device (2) includes a fixing structure (26) and a flip protection cover (21). The flip protection cover (21) is hinged to the fixing structure (26), and the flip protection cover (21) rotates to cover the fixing structure; the locking base plate (5) is installed in the upper slot (12) of the distribution board (1). The lower end of the locking and sliding device (3) is connected to the locking base plate (5), and the upper end of the locking and sliding device (3) is installed in the fixing structure (26). The fixing structure (26) and the locking and sliding device (3) are fixedly connected by a locking bolt (4); a fixing hole is provided in the middle of the side of the locking and sliding device (3). When the knife switch (11) is turned off, the knife switch (11) extends into the fixing hole on the locking and sliding device (3). When the locking bolt (4) is screwed into the locking and sliding device (3), the bottom end of the locking bolt (4) fixes the knife switch (11). A sliding through hole (22) is provided in the middle of the fixing structure (26). The locking and sliding device (3) is generally rectangular parallelepiped-shaped. An internal thread hole (31) is provided at the upper end of the locking and sliding device (3). A square hole (32) is opened in the middle of the locking and sliding device (3). A metal plate (33) is provided at the lower end of the square hole (32) in the middle of the locking and sliding device (3). The metal plate (33) is serrated. An inclined angle structure is provided at the lower end of the locking and sliding device (3). Two round holes (34) are provided on the end face of the inclined angle structure. The inclined angle structure is integrally formed with the locking and sliding device (3). The upper end of the locking and sliding device (3) is inserted into the sliding through hole (22) in the fixing structure (26). The locking bolt (4) is inserted through the insertion hole (23) on the fixing structure (26) to fix the fixing structure (26) and the locking and sliding device (3).

2. The anti-closing locking protection device for ship electrical equipment according to claim 1, characterized in that, The locking base plate (5) is generally groove-shaped. A base plate buckle (51) is provided on the upper left side of the locking base plate (5). A base plate slot (52) is provided on the right side of the locking base plate (5) below the base plate buckle (51). A square hole (53) is opened in the middle of the locking base plate (5). Two round holes (34) are provided at the lower end of the locking base plate (5); the base plate buckle (51) at the upper end of the locking base plate (5) is embedded in the slot (12) above the distribution board (1). When the knife switch (11) is turned off, the knife switch (11) extends out of the square hole (53) in the middle of the locking base plate.

3. A closing locking protection device for marine electrical equipment according to claim 1, characterized in that, The fixed structure (26) is generally rectangular parallelepiped in shape. A fixed buckle (24) is provided on one side surface of one end of the fixed structure (26), and a lock ring (25) is provided at the other end of the fixed structure (26). An insertion hole (23) is provided at the upper end of the sliding through hole (22), and the inner diameter of the insertion hole (23) is smaller than the inner diameter of the sliding through hole (22). The lower end of the fixed structure (26) at the end where the lock ring (25) is provided is hingedly connected to the flip protection cover (21).

4. A protection device for preventing closing and locking of marine electrical equipment according to claim 3, characterized in that, The flip protection cover (21) is generally L-shaped. A lock ring groove is formed on the end face of the flip protection cover (21) hinged to the fixed structure (26). When the flip protection cover (21) rotates and covers above the fixed structure, the lock ring (25) extends out of the lock ring groove, and a padlock (6) is installed on the lock ring (25).

5. A protection device for preventing closing and locking of marine electrical equipment according to claim 1, characterized in that, External threads are provided on the locking bolt (4), and the external threads on the locking bolt (4) match the internal threads on the locking sliding device (3).

6. A protection device for preventing closing and locking of marine electrical equipment according to claim 5, characterized in that, The round holes (34) on the inclined structure below the locking sliding device (3) are aligned with the round holes (34) at the lower end of the locking bottom plate (5), and the locking sliding device (3) and the locking bottom plate (5) are fixed by fixing bolts. When the locking sliding device (3) and the locking bottom plate (5) are fixed, the square hole (32) in the locking sliding device (3) is aligned with the square hole (53) in the locking bottom plate (5).

7. A method for preventing closing locking protection of ship electrical equipment, according to any one of claims 1-6, a device for preventing closing locking protection of ship electrical equipment, characterized in that, This method specifically includes the following steps: First step, prepare a locking protection device for preventing closing of ship electrical equipment. This device includes a locking and fixing device (2), a locking sliding device (3), a locking bolt (4), and a locking bottom plate (5). The locking and fixing device (2) includes a fixed structure (26) and a flip protection cover (21). The flip protection cover (21) is hingedly connected to the fixed structure (26), and the flip protection cover (21) rotates and covers above the fixed structure. The locking bottom plate (5) is installed in the upper slot (12) of the distribution board (1). The lower end of the locking sliding device (3) is connected to the locking bottom plate (5), and the upper end of the locking sliding device (3) is installed in the fixed structure (26). The fixed structure (26) and the locking sliding device (3) are fixedly connected by a locking bolt (4). A fixing hole is provided in the middle of the side surface of the locking sliding device (3). When the knife switch (11) is turned off, the knife switch (11) extends into the fixing hole on the locking sliding device (3). When the locking bolt (4) is screwed into the locking sliding device (3), the bottom end of the locking bolt (4) fixes the knife switch (11). Second step, keep the knife switch (11) on the distribution board (1) in the off state, insert the upper end of the locking sliding device (3) into the sliding through hole (22) in the locking and fixing device, insert the locking bolt (4) through the insertion hole (23) in the fixing structure (26), and screw the locking bolt (4) into the internal thread hole (31) in the locking sliding device (3) to fix the fixing structure (26) and the locking sliding device (3); Third step, insert the fixing buckle (24) on one side of the locking and fixing device into the bottom plate slot (52) at the upper end of the locking bottom plate (5) to fixedly connect the locking and fixing device and the locking bottom plate (5). Then, embed the bottom plate buckle (51) at the upper end of the locking bottom plate (5) into the slot (12) above the distribution board (1) to fix the locking bottom plate (5) and the distribution board (1), and the locking bottom plate (5) fits with the distribution board (1); Fourth step, when the locking bottom plate (5) is fixed on the distribution board (1), the knife switch (11) extends out from the square hole (32) in the locking sliding device (3); screw the locking bolt (4) so that the bottom end of the locking bolt (4) presses on the knife switch (11) and makes the knife switch (11) move downward onto the metal plate (33) in the locking sliding device (3), and the locking bolt (4) presses the knife switch (11) tightly on the metal plate (33); Fifth step, when the knife switch (11) is pressed tightly on the metal plate (33), rotate the flip protection cover (21) so that the flip protection cover (21) covers above the locking and fixing device, and install the padlock (6) on the lock ring (25) to fix the flip protection cover (21) above the locking and fixing device, and the operator conducts circuit inspection and maintenance of the electrical equipment; Sixth step, after the circuit inspection and maintenance of the electrical equipment are completed, remove the ship electrical equipment anti-closing locking protection device from the distribution board (1), switch on the knife switch (11) to make the electrical equipment operate normally, and complete the operation of preventing the closing of the ship electrical equipment.

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