A cable drum convenient to replace on a crown block and a replacement method thereof

Abstract

The application discloses a cable drum convenient to replace on a crown block and a replacing method thereof and belongs to the technical field of cable drum replacing, which comprises two bottom plates, vertical plates are arranged on the top sides of the bottom plates, wire-out boxes are arranged on the vertical plates, rotating shafts are arranged in the vertical plates, volute springs are rotatably connected to the outer surfaces of the rotating shafts, sleeve bodies are rotatably connected to the outer surfaces of the rotating shafts, baffle plates are arranged on the left and right sides of the sleeve bodies, horizontal rods are arranged on the opposite sides of the vertical plates, at least one pair of connecting holes are formed in the baffle plates, locking pieces are arranged on the horizontal rods, the baffle plates are connected with the horizontal rods through the connecting holes and the locking pieces, auxiliary rotating assemblies are detachably arranged on the wire-out boxes and the rotating shafts, and limiting assemblies are arranged on the auxiliary rotating assemblies. The baffle plates and the cable drum are fixed through the locking pieces, so that the cable drum can be stored for a long time after the locking torque ring.

Description

Technical Field

[0001] This invention relates to the field of cable reel replacement technology, specifically to a cable reel that is easy to replace on an overhead crane and a replacement method thereof. Background Technology

[0002] Electromagnetic bridge cranes are bridge cranes that use electromagnets as the lifting mechanism. They are used to lift magnetically conductive metal materials, such as structural steel, steel plates, and scrap steel. The electromagnets use direct current and are controlled by a separate electrical system. The power cable is automatically wound up via a spring-driven elastic cable reel. This system is used in various applications to power the moving cable of the lifting electromagnet on the overhead crane bridge and the ground lifting device.

[0003] During use, the worm spring of the cable reel is prone to failure due to reasons such as power cable breakage and frequent use. The existing technology for replacing the worm spring involves first removing the cable from the damaged cable reel, then removing the damaged cable reel from the overhead crane, then fixing the new cable reel on the overhead crane, manually rotating the cable reel to the torque ring, and then using a pry bar to hold the cable reel in place to prevent the worm spring from deforming and causing the cable reel to rotate. Finally, the external cable is connected to the internal terminal of the cable reel, completing the replacement of the cable reel and worm spring.

[0004] The existing technology has the following technical defects. First, due to reasons such as the crowbar not being securely fastened or accidental tripping, the cable reel can rotate at high speed, posing a huge hidden danger to safe production. Second, the cable reel requires multiple people to rotate it simultaneously, but the space on the overhead crane is narrow, making it inconvenient for multiple workers to stand on the crane at the same time to rotate the cable reel to the specified torque. Third, there are no guardrails on the left and right sides of the overhead crane, making it risky for workers to carry out construction on the crane and prone to safety accidents. Finally, replacing a single-spring cable reel takes 1 hour and a double-spring takes 1.5 hours, which is a long time required for replacement. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a cable reel that is easy to replace on an overhead crane and a method for replacing it.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a cable reel that is easy to replace on an overhead crane and a method for replacing it, comprising two base plates, a vertical plate installed on the top side of the base plates, a cable outlet box provided on the vertical plate, a rotating shaft installed inside the two vertical plates, a worm spring rotatably connected to the outer surface of the rotating shaft, a sleeve body rotatably connected to the outer surface of the rotating shaft, baffles installed on both the left and right sides of the sleeve body, a crossbar installed on the opposite side of the two vertical plates, at least one pair of connecting holes opened on the baffles, a locking element provided on the crossbar, the baffles being connected to the crossbar through the connecting holes via the locking element, and an auxiliary rotating assembly detachably provided on the cable outlet box and the rotating shaft, the auxiliary rotating assembly being provided with a limiting component.

[0007] By adopting the above technical solution, the auxiliary rotation component makes the sleeve body more labor-saving during rotation, so that the sleeve body can be locked with torque under single-person operation. The limiting component can conveniently lock the torque of the sleeve body, so that the torque ring of the cable reel can be locked by the locking component. The locking component is used to fix the sleeve body and the baffle on the crossbar, so that the torque ring of the cable reel can be locked before the cable reel is installed. At the same time, the limiting component and the auxiliary rotation component can be easily disassembled and applied to other cable reels.

[0008] Preferably, the locking element consists of two iron wires, one end of which is wound around the crossbar, and the iron wires pass through the corresponding connecting holes and are then wound around the crossbar.

[0009] By adopting the above technical solution, the baffle and the crossbar can be bound together with iron wire, thereby locking the torque ring of the sleeve body and making it convenient to store the sleeve body with the locked torque ring for a long time.

[0010] Preferably, the locking component includes a connecting plate mounted on the outer surface of the crossbar, a first bolt slidably connected inside the connecting plate, and a first nut threadedly connected to the outer surface of the first bolt. The connecting plate has a through hole for the first bolt to pass through, and the first bolt is locked by the first nut after passing through the through hole and the connecting hole on the connecting plate.

[0011] By adopting the above technical solution, the crossbar and the baffle can be fixed together using the first bolt and the first nut, thereby preventing the baffle and the cable reel from rotating and achieving early locking of the torque ring.

[0012] Preferably, the auxiliary rotation assembly includes a mounting plate detachably mounted on the outlet box, a rotating rod rotatably connected inside the mounting plate, a turntable mounted at one end of the rotating rod, a driving pinion mounted on the outer surface of the rotating rod, and a driven large gear detachably mounted on the outer surface of the rotating shaft. The driving pinion and the driven large gear mesh with each other.

[0013] By adopting the above technical solution, the rotating turntable can drive the rotating rod and the driving pinion to rotate. The cooperation between the driving pinion and the driven large gear can save the force required to rotate the sleeve body, thereby enabling the sleeve body to rotate under single-person operation.

[0014] Preferably, a base plate is installed at the bottom end of the mounting plate, and the base plate is installed on the top side of the outlet box by a second bolt.

[0015] By adopting the above technical solution, it is convenient to install the mounting plate onto the outlet box, and it is also convenient to disassemble the auxiliary rotating component after use, thereby realizing the reuse of the auxiliary rotating component.

[0016] Preferably, the driven large gear includes two half gears, multiple pairs of lugs mounted on both sides of the half gears, a third bolt passing through the interior of each set of lugs, and a second nut threaded onto the outer surface of the third bolt.

[0017] By adopting the above technical solution, the driven large gear can be easily installed on the rotating shaft, and the driven large gear can also be easily removed from the rotating shaft.

[0018] Preferably, the limiting assembly includes a horizontal plate installed on one side of the mounting plate, a screw threadedly connected to the inside of the horizontal plate, a handle installed at one end of the screw, a limiting plate rotatably connected to the other end of the screw away from the handle, a limiting rod slidably connected inside the horizontal plate, one end of the limiting rod being connected to the side corresponding to the limiting plate, and the limiting plate limiting the rotating rod by abutting against the outer surface of the rotating rod.

[0019] By adopting the above technical solution, the sleeve body can be limited by the limiting abutment rotating rod, thus facilitating the installation of the locking component on the crossbar and the baffle.

[0020] Preferably, the auxiliary rotating assembly further includes a fixed plate mounted on the horizontal plate, and the rotating rod is rotatably connected to the fixed plate through a bearing seat.

[0021] By adopting the above technical solution, the rotating rod can be supported by a fixed plate, thereby ensuring the stability of the rotating rod during rotation.

[0022] Preferably, inspection ports are provided on opposite sides of the two baffles, and the outer surface of the sleeve body is used to wrap the cable.

[0023] By adopting the above technical solution, the inspection port can facilitate the inspection of the inside of the cable reel, thereby facilitating the timely replacement of the cable reel after it is damaged.

[0024] A method for safely and quickly replacing cable reels online using an overhead crane is more efficient and convenient when the torque coil of the reel body is pre-locked on the ground. The method includes the following steps:

[0025] Step 1: Place the new sleeve body on the ground, so that the worm spring is in its natural state. Make at least one set of connection holes at the lowest point of the baffles on both sides of the new sleeve body, and loosen the connection bolts of each terminal on the new sleeve body.

[0026] Step 2: Observe in advance the upper and lower limits of the overhead crane hoisting mechanism and the number of cable reels wound and released corresponding to the sleeve body. Use this number of reels plus the number of reels retained by the sleeve body as the torque reels.

[0027] Step 3: Install the auxiliary rotation assembly on the cable outlet box and connect the auxiliary rotation assembly to the rotating shaft;

[0028] Step 4: By rotating the turntable on the auxiliary rotating component, the turntable drives the sleeve body to rotate, so that the sleeve body rotates to the specified torque circle, while keeping the connecting hole at the lowest point, and using the limiting mechanism to temporarily lock the sleeve body to the torque circle.

[0029] Step 5: Then, use the wire to pass through the corresponding connecting holes on both sides of the sleeve body, and use the locking device to connect the baffle and the crossbar.

[0030] Step 6: Remove the auxiliary rotating assembly and limit assembly from the new cable reel, and transport the new cable reel onto the overhead crane;

[0031] Step 7: Unscrew the anchor bolts of the old cable reel on the crane, remove the cable from the old sleeve body, install the removed cable onto the new sleeve body, install the new cable reel on the crane, and remove the wire wrapped around the crossbar.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. The baffle and cable reel are fixed by locking components, which facilitates long-term storage of the cable reel after the locking torque coil is engaged, so that it can be used directly when needed. This replaces the existing method of locking the cable torque coil with tools such as pry bars, avoiding the situation where the pry bar is not securely engaged or is accidentally moved, thus avoiding the safety hazards caused by the cable reel being reset by the worm spring.

[0034] 2. By detachably providing an auxiliary rotating component on the outlet box, the auxiliary rotating component can be installed on the outlet box when it is necessary to lock the torque ring, thereby saving effort when rotating the sleeve body. The sleeve body can be rotated by one person. After locking the torque ring with the locking device, it can be disassembled and used on other sleeve bodies, thereby realizing the reuse of the auxiliary rotating component.

[0035] 3. By providing a limiting component on the auxiliary rotating assembly, the sleeve body can be temporarily locked after the torque ring is adjusted using the auxiliary rotating assembly, thus facilitating the installation of the locking component on the cable reel.

[0036] 4. By adopting the above technical solution to lock the torque ring before replacing the cable reel, the cable reel can be rotated on the ground, which provides a wider construction space compared to the overhead crane. At the same time, the torque ring of the cable reel can be locked in advance when idle, reducing the manpower required for installation. In addition, locking the torque ring of the cable reel on the ground can prevent construction workers from falling from the overhead crane during construction.

[0037] 5. Because the torque ring of the cable reel is locked in advance, the time required to replace the cable reel is shorter, improving replacement efficiency and ensuring project progress. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention.

[0039] Figure 2 This is a side view of the present invention after removing the auxiliary rotation component and the limiting component.

[0040] Figure 3 This is a schematic diagram of the structure of the third embodiment of the present invention.

[0041] Figure 4 This is a schematic diagram of the locking component according to the third embodiment of the present invention.

[0042] Figure 5 This is a schematic diagram of the auxiliary rotation component and the limiting component of the present invention.

[0043] Figure 6This is a side view of the driven gear of the present invention.

[0044] In the diagram: 1. Base plate; 2. Vertical plate; 3. Cable outlet box; 4. Rotating shaft; 5. Snail spring; 6. Sleeve body; 7. Baffle; 8. Horizontal bar; 900. Locking component; 901. Wire; 902. Connecting plate; 903. First bolt; 904. First nut; 10. Inspection port; 11. Cable; 1200. Auxiliary rotating assembly; 1201. Mounting plate; 1202. Rotating rod; 1203. Turntable; 1204. Driving pinion; 1205. Driven gear; 1206. Fixing plate; 1300. Limiting assembly; 1301. Horizontal plate; 1302. Screw; 1303. Handle; 1304. Limiting plate; 1305. Limiting rod; 14. Connecting hole. Detailed Implementation

[0045] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0046] Please refer to Figures 1 to 6 This embodiment of a cable reel for safe and quick online replacement by an overhead crane includes two base plates 1. A vertical plate 2 is installed on the top side of the base plate 1. A cable outlet box 3 is provided on the vertical plate 2. A rotating shaft 4 is installed inside the two vertical plates 2. A spiral spring 5 is rotatably connected to the outer surface of the rotating shaft 4. A sleeve body 6 is rotatably connected to the outer surface of the rotating shaft 4. Baffles 7 are installed on both the left and right sides of the sleeve body 6. A crossbar 8 is installed on the opposite side of the two vertical plates 2. At least one pair of connecting holes 14 are provided on the baffles 7. A locking element 900 is provided on the crossbar 8. The baffles 7 are connected to the crossbar 8 through the connecting holes 14 via the locking element 900. An auxiliary rotating assembly 1200 is detachably provided on the cable outlet box 3 and the rotating shaft 4. A limiting assembly 1300 is provided on the auxiliary rotating assembly 1200. An inspection port 10 is provided on the opposite side of the two baffles 7. The outer surface of the sleeve body is used to wind the cable 11.

[0047] Understandably, the outlet box 3 is used to connect to the power supply for power supply, the spiral spring 5 is used for deformation recovery to drive the cable 11 to retract, thereby winding the cable 11 onto the sleeve body 6, the baffle 7 can limit the cable 11 to prevent the cable 11 from falling off from both sides of the sleeve body 6, the locking part 900 and the connecting hole 14 are used to connect the baffle 7 and the sleeve body 6 to the crossbar 8, so that the torque ring of the sleeve body 6 can be locked in advance after the cable drum has been rotated to a specified number of turns, and at the same time, it is convenient to store the sleeve body 6 for a long time after locking the torque ring. The auxiliary rotation component 1200 is used to reduce the effort when rotating the sleeve body 6, so that the sleeve body 6 can be rotated by a single person. The limiting component 1300 is used to temporarily limit the torque ring of the sleeve body 6 after it has been adjusted, so that the torque ring of the sleeve body 6 can be locked by the locking part 900.

[0048] It should be noted that, compared to using the limiting component 1300 to lock the torque coil of the sleeve body 6, using the locking component 900 to lock the torque coil of the sleeve body 6 is more economical and can also facilitate the application of the auxiliary rotating component 1200 and the limiting component 1300 to other cable reels.

[0049] Please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 In this embodiment, the auxiliary rotating assembly 1200 includes a mounting plate 1201 detachably mounted on the outlet box 3. A base plate is mounted on the bottom end of the mounting plate 1201. The base plate is mounted on the top side of the outlet box 3 by a second bolt. A rotating rod 1202 is rotatably connected inside the mounting plate 1201. A turntable 1203 is mounted on one end of the rotating rod 1202. A driving pinion 1204 is mounted on the outer surface of the rotating rod 1202. The auxiliary rotating assembly 1200 also includes a driven large gear 1205 detachably mounted on the outer surface of the rotating shaft 4. The driving pinion 1204 and the driven large gear 1205 mesh with each other. The driven large gear 1205 includes two half-gears, multiple pairs of lugs mounted on both sides of the half-gears, a third bolt passing through the inside of each set of lugs, and a second nut threaded onto the outer surface of the third bolt.

[0050] It should be noted that the mounting plate 1201 is mounted on the outlet box 3 via the base plate and the second bolt, which facilitates the installation and removal of the mounting plate 1201. The driven large gear 1205 is connected together via the third bolt, the second nut and the ear plate, which facilitates its removal and installation from the rotating shaft 4, thereby facilitating the reuse of the auxiliary rotating component 1200. The turntable 1203 can reduce the effort required to rotate the rotating rod 1202, thus ensuring that the rotating rod 1202 reduces the effort required to rotate the driving small gear 1204. The driving small gear 1204 and the driven large gear 1205 work together to reduce the force required to rotate the sleeve body 6, thereby enabling the sleeve body 6 to be rotated by a single person.

[0051] Please refer to Figure 1 , Figure 2 and Figure 5 In this embodiment, the limiting component 1300 includes a horizontal plate 1301 installed on one side of the mounting plate 1201. A screw 1302 is threadedly connected inside the horizontal plate 1301. A handle 1303 is installed at one end of the screw 1302. A limiting plate 1304 is rotatably connected to the other end of the screw 1302 away from the handle 1303. A limiting rod 1305 is slidably connected inside the horizontal plate 1301. One end of the limiting rod 1305 is connected to the corresponding side of the limiting plate 1304. The limiting plate 1304 can limit the rotating rod 1202 by abutting against the outer surface of the rotating rod 1202.

[0052] It should be noted that the handle 1303 can easily drive the screw 1302 to rotate, and the screw 1302 can drive the limiting plate 1304 to move, so that the limiting plate 1304 can abut against the rotating rod 1202, thereby limiting the rotating rod 1202, and thus temporarily locking the torque ring of the sleeve body 6, making it convenient to install the locking part 900 on the cable reel.

[0053] Please refer to Figure 4 In this embodiment, the auxiliary rotation assembly 1200 also includes a fixed plate 1206 mounted on the horizontal plate 1301, and the rotating rod 1202 is rotatably connected to the fixed plate 1206 through a bearing seat.

[0054] It should be noted that the fixing plate is used to support the rotating rod 1202, thereby enabling the rotating rod 1202 to rotate stably. Example 2

[0055] Please refer to Figures 1 to 2 In this embodiment, the locking element 900 consists of two iron wires 901 with one end wrapped around the crossbar 8. The iron wires 901 pass through the corresponding connecting holes 14 and are then wrapped around the crossbar 8.

[0056] In this embodiment, the sleeve body 6 and the baffle 7 are fixed in advance by passing an iron wire through the first connecting hole and wrapping the two ends of the iron wire around the crossbar 8. This prevents the baffle 7 and the sleeve body 6 from rotating due to the deformation recovery of the worm spring 5, making it convenient to lock the torque coil in advance on the ground without the need for the operator to rotate the cable reel on the crane to lock the torque coil.

[0057] It should be noted that the locking element 900 can also be a steel wire rope.

[0058] A method for replacing cable reels online safely and quickly using an overhead crane is more efficient and convenient when the torque coil of the sleeve body 6 is locked in advance on the ground. The method includes the following steps:

[0059] Step 1: Place the new sleeve body 6 on the ground, rotate the new sleeve body 6 to bring the worm spring 5 to its natural state, and open at least one set of connection holes 14 at the lowest point of the baffles 7 on both the left and right sides of the new sleeve body 6. At the same time, loosen the connection bolts of each terminal on the new sleeve body 6.

[0060] Step 2: Observe in advance the upper and lower limits of the overhead crane hoisting mechanism and the number of turns of the winding and releasing cable 11 corresponding to the sleeve body 6. Use this number of turns plus the number of turns retained in the sleeve body 6 as the torque turns. For example, if the number of turns corresponding to the upper and lower limits is seven turns and the number of turns retained is three turns, then the torque turns of the sleeve body 6 is ten turns.

[0061] Step 3: Place the base plate on the mounting plate 1201 against the outlet box 3, thread the second bolt onto the outlet box 3, install the two half gears on the outer surface of the rotating shaft 4, and adjust the position and angle of the two half gears so that the half gears can mesh with the driving pinion. Pass the third bolt through the corresponding pair of ear plates and screw on the second nut to splice the driven large gear 1205.

[0062] Step 4: Rotate the turntable 1203 to drive the sleeve body 6 to rotate, so that the sleeve body 6 rotates ten times to reach the torque circle of the sleeve body 6, while keeping the connecting hole 14 at the lowest point. Rotate the handle 1303, and the handle 1303 drives the screw 1302 to rotate. The screw 1302 drives the limiting plate 1304 to move downward. The limiting plate 1304 abuts against the rotating rod 1202 to limit the rotating rod 1202, thereby temporarily locking the torque circle of the sleeve body 6.

[0063] Step 5: Then, use the wire 901 to pass through the corresponding connecting holes 14 on both sides of the sleeve body 6, and wrap both ends of the wire 901 around the crossbar 8 to achieve long-term locking of the torque ring of the sleeve body 6.

[0064] Step 6: Remove the second bolt on the outlet box 3, remove the mounting plate 1201 from the outlet box 3, rotate the second nut to remove the second nut from the third bolt, then remove the third nut from the ear plate, remove the driven large gear 1205 from the rotating shaft 4, and then transport the new cable reel to the overhead crane.

[0065] Step 7: Unscrew the anchor bolts of the old cable reel on the crane, remove the cable 11 from the old sleeve body 6, install the removed cable 11 onto the new sleeve body 6, install the new cable reel on the crane, and remove the wire 901 wrapped around the crossbar 8 so that the sleeve body 6 can rotate freely.

[0066] In this embodiment, a wire is passed through the first connecting hole and then wrapped around the crossbar 8 to lock the cable reel. Compared with using a pry bar to fix the cable reel, this method is safer, as the cable reel will not rotate due to the movement of the pry bar. At the same time, the torque coil of the cable coil can be locked on the ground, avoiding the danger of locking the torque coil of the cable coil on the overhead crane. It is also convenient to lock the torque coil of the cable coil when not in use, reducing the construction time required to replace the cable coil. Example 3

[0067] Please refer to Figures 1 to 4 In this embodiment, the locking component 900 includes a connecting plate 902 installed on the outer surface of the crossbar 8, a first bolt 903 slidably connected inside the connecting plate 902, and a first nut 904 threadedly connected to the outer surface of the first bolt 903. The connecting plate 902 has a through hole for the first bolt 903 to pass through. After the first bolt 903 passes through the through hole and the connecting hole 14 on the connecting plate 902, it is locked by the first nut 904.

[0068] A method for replacing cable reels online safely and quickly using an overhead crane is more efficient and convenient when the torque coil of the sleeve body 6 is locked in advance on the ground. The method includes the following steps:

[0069] Step 1: Place the new sleeve body 6 on the ground, rotate the new sleeve body 6 to bring the worm spring 5 to its natural state, and open at least one set of connection holes 14 at the lowest point of the baffles 7 on both the left and right sides of the new sleeve body 6. At the same time, loosen the connection bolts of each terminal on the new sleeve body 6.

[0070] Step 2: Observe in advance the upper and lower limits of the overhead crane hoisting mechanism and the number of turns of the winding and releasing cable 11 corresponding to the sleeve body 6. Use this number of turns plus the number of turns retained in the sleeve body 6 as the torque turns. For example, if the number of turns corresponding to the upper and lower limits is seven turns and the number of turns retained is three turns, then the torque turns of the sleeve body 6 is ten turns.

[0071] Step 3: Place the base plate on the mounting plate 1201 against the outlet box 3, thread the second bolt onto the outlet box 3, install the two half gears on the outer surface of the rotating shaft 4, and adjust the position and angle of the two half gears so that the half gears can mesh with the driving pinion. Pass the third bolt through the corresponding pair of ear plates and screw on the second nut to splice the driven large gear 1205.

[0072] Step 4: Rotate the turntable 1203 to drive the sleeve body 6 to rotate, so that the sleeve body 6 rotates ten times to reach the torque circle of the sleeve body 6, while keeping the connecting hole 14 at the lowest point. Rotate the handle 1303, and the handle 1303 drives the screw 1302 to rotate. The screw 1302 drives the limiting plate 1304 to move downward. The limiting plate 1304 abuts against the rotating rod 1202 to limit the rotating rod 1202, thereby temporarily locking the torque circle of the sleeve body 6.

[0073] Step 5: Using the first bolt 903 to pass through the connecting holes 14 on the corresponding two sides of the sleeve body 6 and the through hole on the connecting plate 902, the first nut 904 is threaded to the outer surface of the first bolt 903 to achieve long-term locking of the torque ring of the sleeve body 6.

[0074] Step 6: Remove the second bolt on the outlet box 3, remove the mounting plate 1201 from the outlet box 3, rotate the second nut to remove the second nut from the third bolt, then remove the third nut from the ear plate, remove the driven large gear 1205 from the rotating shaft 4, and then transport the new cable reel to the overhead crane.

[0075] Step 7: Unscrew the anchor bolts of the old cable reel on the crane, remove the cable 11 from the old sleeve body 6, install the removed cable 11 onto the new sleeve body 6, install the new cable reel on the crane, unscrew the first nut 904 on the first bolt 903, and pull the first bolt 903 out of the connecting hole 14 so that the sleeve body 6 can rotate freely.

[0076] The connecting plate 902 and the baffle 7 can be locked together by the first bolt 903 and the first nut 904, thereby preventing the baffle 7 and the sleeve body 6 from rotating due to the deformation recovery of the worm spring 5. This method is simpler to operate and has higher stability than the first embodiment.

[0077] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cable drum convenient to replace on a crown block, comprising two bottom plates (1), the top side of the bottom plate (1) is provided with a vertical plate (2), the vertical plate (2) is provided with a wire outlet box (3), the inside of the two vertical plates (2) is provided with a rotating shaft (4), the outer surface of the rotating shaft (4) is rotatably connected with a volute spring (5), the outer surface of the rotating shaft (4) is rotatably connected with a sleeve body (6), the left and right sides of the sleeve body (6) are both provided with a baffle (7), the opposite side of the two vertical plates (2) is provided with a cross bar (8), characterized in that, The baffle (7) is provided with at least one pair of connecting holes (14), the horizontal rod (8) is provided with a locking piece (900), the baffle (7) is connected with the horizontal rod (8) through the connecting holes (14) and the locking piece (900), the outlet box (3) and the rotating shaft (4) are detachably provided with an auxiliary rotating assembly (1200), and the auxiliary rotating assembly (1200) is provided with a limiting assembly (1300); the auxiliary rotating assembly (1200) comprises a mounting plate (1201) detachably mounted on the outlet box (3), a rotating rod (1202) rotatably connected to the inside of the mounting plate (1201), a rotating disc (1203) mounted at one end of the rotating rod (1202), and a driving pinion (1204) mounted on the outer surface of the rotating rod (1202); the auxiliary rotating assembly (1200) further comprises a driven gear (1205) detachably mounted on the outer surface of the rotating shaft (4), and the driving pinion (1204) and the driven gear (1205) are in meshing engagement.

2. A cable drum for easy replacement on a crown block according to claim 1, characterized in that The locking piece (900) is two iron wires (901) wound on the horizontal rod (8), and the iron wires (901) are wound on the horizontal rod (8) after passing through the corresponding connecting holes (14) respectively.

3. A cable drum for easy replacement on a crown block as claimed in claim 1, characterized in that, The locking piece (900) comprises a connecting plate (902) mounted on the outer surface of the horizontal rod (8), a first bolt (903) slidingly connected in the connecting plate (902), and a first nut (904) threadedly connected to the outer surface of the first bolt (903), the connecting plate (902) is provided with a through hole for the first bolt (903) to pass through, and the first bolt (903) is locked by the first nut (904) after passing through the through hole on the connecting plate (902) and the connecting hole (14).

4. The cable drum according to claim 1, wherein, The bottom end of the mounting plate (1201) is provided with a bottom plate, and the bottom plate is mounted on the top side of the outlet box (3) through a second bolt.

5. The cable drum of claim 1, wherein, The driven gear (1205) comprises two half gear wheels, a plurality of pairs of ear plates mounted on the two sides of the half gear wheels, a third bolt penetrating each group of the ear plates, and a second nut threadedly connected to the outer surface of the third bolt.

6. A cable drum for easy replacement on a crown block as claimed in claim 1, characterized in that, The limiting assembly (1300) comprises a horizontal plate (1301) mounted on one side of the mounting plate (1201), a screw rod (1302) threadedly connected in the horizontal plate (1301), a handle (1303) mounted at one end of the screw rod (1302), a limiting plate (1304) rotatably connected to the other end of the screw rod (1302) away from the handle (1303), a limiting rod (1305) slidingly connected in the horizontal plate (1301), and one end of the limiting rod (1305) connected to the corresponding side of the limiting plate (1304), the limiting plate (1304) can limit the rotating rod (1202) by abutting against the outer surface of the rotating rod (1202).

7. A cable drum for easy replacement on a crown block according to claim 6, characterized in that The auxiliary rotating assembly (1200) further comprises a fixed plate (1206) installed on the horizontal plate (1301), and the rotating rod (1202) is rotationally connected with the fixed plate (1206) through a bearing seat.

8. A cable drum for easy replacement on a headgear according to any one of claims 1-6, characterized in that, Two said baffle (7) side away from each other are provided with inspection port (10), the outer surface of sleeve body is used for winding cable (11).

9. The method of claim 1-8, wherein, It is more efficient and convenient to lock the torque ring of the sleeve body (6) in advance on the ground, and the method comprises the following steps: Step 1, place the new sleeve body (6) on the ground, so that the spiral spring (5) is in a natural state, at least one group of connecting holes (14) are formed on the lowest point of the baffle (7) on the left and right sides of the new sleeve body (6), and the wiring bolts of the terminal posts on the new sleeve body (6) are loosened; Step 2, observe the upper limit and lower limit of the crown block lifting mechanism in advance, and the corresponding number of turns of the sleeve body (6) when winding and releasing the cable (11), and use the number of turns plus the reserved turns of the sleeve body (6) as the torque ring; Step 3, install the auxiliary rotating assembly (1200) on the outlet box (3) and connect the auxiliary rotating assembly (1200) with the rotating shaft (4); Step 4, rotate the rotating disc (1203) on the auxiliary rotating assembly (1200), the rotating disc (1203) drives the sleeve body (6) to rotate, the sleeve body (6) is rotated to the specified torque ring, and the connecting holes (14) are kept at the lowest point, and the sleeve body (6) is temporarily locked in the torque ring by the limiting assembly (1300); Step 5, pass the connecting holes (14) on the corresponding two sides of the sleeve body (6) through the iron wire (901), and connect the baffle (7) with the horizontal rod (8) by the locking piece (900); Step 6, remove the auxiliary rotating assembly (1200) and the limiting assembly (1300) from the new cable drum, and transport the new cable drum to the crown block; Step 7, unscrew the anchor bolts of the old cable drum on the crown block, remove the cable (11) from the old sleeve body (6), install the removed cable (11) on the new sleeve body (6), install the new cable drum on the crown block, and remove the iron wire (901) wound on the horizontal rod (8).

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