Cutting device for processing of power cables

Abstract

The application discloses a kind of cut-off device for power cable processing, and the application relates to the technical field of cable processing, including bottom plate, the side surface of the bottom plate is fixedly connected with first fixed plate, one end of the upper surface of the bottom plate is fixedly connected with second fixed plate, the end of the upper surface of the bottom plate away from second fixed plate is fixedly connected with third fixed plate;Line-in device, by setting line-in device, power cable can be inserted into, and after power cable moves out a distance that needs to be cut, power cable is clamped, so that when cutting power cable, power cable will not be offset, the line-in device includes first fixed frame, the first fixed frame is fixedly connected on the upper surface of second fixed plate, the inner cavity of the first fixed frame is fixedly connected with line-in frame, reaches the effect of clamping and cutting when cutting power cable.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cable processing, in particular to a cutting device for power cable processing. BACKGROUND

[0002] The power cable has been used for more than 100 years. The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station outgoing lines, internal power supply of industrial and mining enterprises and underwater power transmission lines across rivers and seas. In the power line, the proportion of the cable is gradually increasing. The power cable is a cable product used for transmitting and distributing high-power electric energy in the main line of a power system, including various voltage levels of 1-500KV and above and various insulation power cables.

[0003] During the processing of the power cable, the power cable needs to be cut off. On the market, the power cable is usually directly cut off by cutting pliers, which may deviate during cutting. SUMMARY

[0004] To achieve the above purpose, the application is implemented through the following technical scheme: a cutting device for power cable processing, comprising a bottom plate, a first fixed plate is fixedly connected to the side surface of the bottom plate, a second fixed plate is fixedly connected to one end of the upper surface of the bottom plate, and a third fixed plate is fixedly connected to the end of the upper surface of the bottom plate away from the second fixed plate;

[0005] The wire entering device can make the power cable enter and clamp the power cable after the power cable moves out of a distance that needs to be cut, so that the power cable does not deviate during cutting. The wire entering device comprises a first fixed frame, the first fixed frame is fixedly connected to the upper surface of the second fixed plate, a wire entering frame is fixedly connected to the inner cavity of the first fixed frame, and a first threaded ring is fixedly connected to the inner cavity of the wire entering frame.

[0006] The wire passing device can guide the power cable in the wire entering device to enter the inner cavity of the cutting device. The wire passing device comprises a wire passing pipe, threaded connection rings are fixedly connected to both ends of the wire passing pipe, and the threaded connection ring at one end is threadedly connected to the inner cavity of the first threaded ring. The threaded connection ring can connect the wire entering device and the cutting device together.

[0007] Preferably, the bottom surface of the inlet frame inner cavity is fixedly connected with a first soft pad, the upper surface of the first soft pad is fixedly connected with a first anti-skid block, the upper surface of the inlet frame is fixedly connected with a first limiting plate, and the first soft pad and the first anti-skid block are matched with the clamping device, so that the power cable is not offset when clamped.

[0008] Preferably, the inlet device further comprises a clamping device, the clamping device can clamp the power cable, thereby preventing the power cable from being offset when cutting, and the clamping device comprises a base, the base is fixedly connected to the side of the first fixed plate away from the bottom plate, a six-rib limiting column is fixedly connected to the shaft center of the upper surface of the base, and a top plate is fixedly connected to the top end of the six-rib limiting column.

[0009] Preferably, the outer surface of the six-rib limiting column is slidably connected with a sliding ring, the outer surface of the sliding ring is fixedly connected with a first fixed block, the upper surface of the first fixed block is fixedly connected with a first spring, the first spring can generate elastic potential energy to press the sliding ring and clamp the power cable, the top end of the first spring is fixedly connected to the lower surface of the top plate, the lower surface of the first fixed block is fixedly connected with a second soft pad, the second soft pad is in pressing fit with the upper surface of the base, and the second soft pad can prevent the sliding ring from being damaged when moving downward quickly.

[0010] Preferably, the side of the first fixed block away from the sliding ring is fixedly connected with a support rod, one end of the support rod away from the first fixed block is fixedly connected with a wrapping plate, and the wrapping plate is arranged directly above the first anti-skid block, so that the upper surface of the power cable can be clamped when the sliding ring moves on the outer surface of the six-rib limiting column.

[0011] Preferably, the side surfaces of the wrapping plate are fixedly connected with clamping plates, the clamping plates are in pressing fit with the clamping grooves in the upper surface of the first limiting plate, the outer surface of the clamping plate is fixedly connected with a first limiting rod, and the first limiting rod is arranged in the circular hole in the upper surface of the first limiting plate, so that the wrapping plate is directly above the first anti-skid block, and the power cable can be wrapped and clamped more accurately.

[0012] Preferably, a second fixing block is fixedly connected to the top surface of the inner cavity of the wrapping plate, a second spring is fixedly connected to the lower surface of the second fixing block, a pressing plate is fixedly connected to the bottom end of the second spring, and a second anti-slip block is fixedly connected to the lower surface of the pressing plate. The second spring can generate elastic potential energy, thereby causing the pressing plate and the second anti-slip block to press against the upper surface of the power cable, thus improving the clamping effect. When the wrapping plate moves downward, the first limiting rod and the locking plate will move with the locking plate slot. During the downward movement, the second spring causes the pressing plate and the second anti-slip block to move against the upper surface of the power cable, thereby completing the clamping work of the power cable.

[0013] Preferably, a third soft pad is fixedly connected to the inner wall of the threaded connecting ring, and there are several third soft pads evenly distributed. A spring piece is fixedly connected to the inner wall of the threaded connecting ring, and a third fixing block is fixedly connected to the end of the spring piece. An anti-slip plate is fixedly connected to the outer surface of the third fixing block away from the spring piece. The threaded connecting ring facilitates the installation and removal of the wire threading device by the operator. When the power cable is relatively thin, the operator installs the wire threading device; when it is relatively thick, the operator removes the wire threading device. The wire threading device prevents the thin power cable from deforming when moving.

[0014] Preferably, a cutting device is fixedly connected to the upper surface of the third fixing plate. By setting the cutting device, the end of the power cable can be cut after the power cable is clamped, thereby completing the cutting work of the end of the power cable. The cutting device includes a second fixing frame, which is fixedly connected to the upper surface of the third fixing plate. A cable outlet box is fixedly connected to the inner cavity of the second fixing frame. A second threaded ring is fixedly connected to the inner cavity of the cable outlet box. The second threaded ring is sleeved on the end of the cable tube away from the cable inlet device. The setting of the second threaded ring can be connected to the cutting device.

[0015] Preferably, a second limiting plate is fixedly connected to the upper surface of the outlet box, a second limiting rod is slidably connected to the inner cavity of the second limiting plate, a pressing rod is fixedly connected to the top surface of the inner ring of the second limiting rod, a cutting blade is fixedly connected to the bottom end of the pressing rod, a fourth fixing block is fixedly connected to the inner wall of the outlet box, and a limiting ring is fixedly connected to the upper surface of the fourth fixing block. The limiting ring is located directly below the cutting blade. The setting of the second limiting plate can limit the second limiting rod, thereby allowing the cutting blade to move vertically downward to cut the end of the power cable. The setting of the limiting ring can limit the cutting blade after the power cable is cut.

[0016] This invention provides a cutting device for processing power cables. It has the following advantages:

[0017] 1. The power cable cutting device, by setting an inlet device, allows the power cable to pass through it, and after the power cable has moved a certain distance to be cut, it clamps the power cable, so that the power cable will not deviate when cutting the power cable.

[0018] 2. The power cable processing cutting device, by setting a wire threading device, can guide the power cable in the wire entry device to enter the inner cavity of the cutting device. The threaded connecting ring can connect the wire entry device and the cutting device together.

[0019] Third, the cutting device for power cable processing can clamp the power cable by setting a clamping device, thereby preventing it from deviating when cutting the power cable. The setting of the hexagonal limiting post can limit the sliding ring, thereby allowing the sliding ring to move up and down in the vertical direction. The setting of the first spring can generate elastic potential energy, thereby squeezing the sliding ring and clamping the power cable.

[0020] Fourth, the cutting device for processing power cables, through the setting of the clamping plate and the first limiting rod, can make the wrapping plate directly above the first anti-sliding block, thereby enabling more precise wrapping and clamping of the power cable. The setting of the second spring can generate elastic potential energy, which in turn causes the extrusion plate and the second anti-sliding block to press against the upper surface of the power cable, thereby improving the clamping effect.

[0021] 5. This power cable processing cutting device, by setting a cutting device, can cut the end of the power cable after it has been clamped, thereby completing the cutting work of the power cable end. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the external structure of a cutting device for processing power cables according to the present invention;

[0023] Figure 2 This is a schematic diagram of the disassembled structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the wire-infeed device of the present invention;

[0025] Figure 4 This is a partial structural diagram of the wire-infeed device of the present invention;

[0026] Figure 5 This is a schematic diagram of the clamping device structure of the present invention;

[0027] Figure 6 This is a partial structural diagram of the clamping device of the present invention;

[0028] Figure 7 This is a schematic diagram of the threading device of the present invention;

[0029] Figure 8 This is a schematic diagram of the cutting device structure of the present invention;

[0030] Figure 9 This is a partial structural diagram of the cutting device of the present invention.

[0031] In the diagram: 1. Base plate; 2. First fixing plate; 3. Second fixing plate; 4. Third fixing plate; 5. Wire inlet device; 6. Wire threading device; 7. Cutting device; 51. First fixing frame; 52. Wire inlet frame; 53. First threaded ring; 54. First soft pad; 55. First anti-slip block; 56. First limiting plate; 57. Clamping device; 571. Base; 572. Hexagonal limiting post; 573. Top plate; 574. Sliding ring; 575. First fixing block; 576. Second soft pad; 577. First spring; 578. Support rod; 579. 5710. Wrapping plate; 5711. Positioning plate; 5712. First limiting rod; 5713. Second fixing block; 5714. Second spring; 5715. Extrusion plate; 5716. Second anti-slip block; 61. Conduit; 62. Threaded connecting ring; 63. Third soft pad; 64. Spring piece; 65. Third fixing block; 66. Anti-slip plate; 71. Second fixing frame; 72. Cable outlet box; 73. Second threaded ring; 74. Second limiting plate; 75. Second limiting rod; 76. Extrusion rod; 77. Cutting blade; 78. Fourth fixing block; 79. Limiting ring. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0033] First embodiment, such as Figures 1-4 As shown, the present invention provides a technical solution: a cutting device for processing power cables, including a base plate 1, a first fixing plate 2 fixedly connected to the side surface of the base plate 1, a second fixing plate 3 fixedly connected to one end of the upper surface of the base plate 1, and a third fixing plate 4 fixedly connected to the end of the upper surface of the base plate 1 away from the second fixing plate 3.

[0034] The cable entry device 5 allows the power cable to pass through it and clamps it after the power cable has moved a certain distance to be cut, so that the power cable will not deviate when it is cut. The cable entry device 5 includes a first fixing frame 51, which is fixedly connected to the upper surface of the second fixing plate 3. A cable entry frame 52 is fixedly connected to the inner cavity of the first fixing frame 51, and a first threaded ring 53 is fixedly connected to the inner cavity of the cable entry frame 52.

[0035] The wire threading device 6 guides the power cable in the wire inlet device 5 so that it can enter the inner cavity of the cutting device 7. The wire threading device 6 includes a wire threading tube 61, and threaded connecting rings 62 are fixedly connected to both ends of the wire threading tube 61. One end of the threaded connecting ring 62 is threaded into the inner cavity of the first threaded ring 53. The threaded connecting ring 62 allows the wire inlet device 5 and the cutting device 7 to be connected together.

[0036] A first soft pad 54 is fixedly connected to the bottom surface of the inner cavity of the wire inlet frame 52, and a first anti-slip block 55 is fixedly connected to the upper surface of the first soft pad 54. A first limiting plate 56 is fixedly connected to the upper surface of the wire inlet frame 52. The first soft pad 54 and the first anti-slip block 55 are designed to cooperate with the clamping device 57, so that the power cable will not be deviated when clamping the power cable. In use, the operator connects the first threaded ring 53 to the threaded connecting ring 62, inserts the end of the power cable into the inner cavity of the wire frame 52, and then lets the power cable enter the inner cavity of the wire threading device 6.

[0037] Second embodiment, such as Figures 5-6As shown, the cable entry device 5 also includes a clamping device 57. By setting the clamping device 57, the power cable can be clamped, thereby preventing it from shifting when the power cable is cut. The clamping device 57 includes a base 571, which is fixedly connected to the side of the first fixing plate 2 away from the base plate 1. A hexagonal limiting post 572 is fixedly connected to the axis of the upper surface of the base 571. A top plate 573 is fixedly connected to the top of the hexagonal limiting post 572. The setting of the hexagonal limiting post 572 can limit the sliding ring 574, thereby allowing the sliding ring 574 to move up and down in the vertical direction. The sliding ring 574 is slidably connected to the outer surface of the hexagonal limiting post 572. A first fixing block 575 is fixedly connected to the outer surface of the sliding ring 574. A first spring 577 is fixedly connected to the upper surface of the first fixing block 575. The spring 577 generates elastic potential energy, which compresses the sliding ring 574 and clamps the power cable. The top of the first spring 577 is fixedly connected to the lower surface of the top plate 573. The lower surface of the first fixing block 575 is fixedly connected to the second soft pad 576, which is pressed and matched with the upper surface of the base 571. The second soft pad 576 prevents the sliding ring 574 from being damaged when it moves downward quickly. In use, before placing the power cable, the operator pulls the support rod 578 to move the sliding ring 574 upward on the outer surface of the hexagonal limiting post 572. After that, the power cable is placed. After placement, the operator releases the support rod 578. Under the influence of the elastic potential energy stored in the first spring 577 and gravity, the sliding ring 574 moves downward, thereby causing the wrapping plate 579 to wrap the power cable.

[0038] A support rod 578 is fixedly connected to the side of the outer surface of the first fixing block 575 away from the sliding ring 574. A wrapping plate 579 is fixedly connected to the end of the support rod 578 away from the first fixing block 575. The wrapping plate 579 is positioned directly above the first anti-slip block 55. The wrapping plate 579 can clamp the upper surface of the power cable when the sliding ring 574 moves on the outer surface of the hexagonal limiting post 572. A locking plate 5710 is fixedly connected to each side surface of the wrapping plate 579. The locking plate 5710 is pressed and adapted to the locking groove on the upper surface of the first limiting plate 56. A first limiting rod 5711 is fixedly connected to the outer surface of the locking plate 5710. The first limiting rod 5711 is positioned at the circular hole on the upper surface of the first limiting plate 56. The positioning plate 5710 and the first limiting rod 5711 can position the wrapping plate 579 directly above the first anti-slip block 55, thereby... The system allows for more precise wrapping and clamping of power cables. A second fixing block 5712 is fixedly connected to the top surface of the inner cavity of the wrapping plate 579. A second spring 5713 is fixedly connected to the lower surface of the second fixing block 5712. A pressing plate 5714 is fixedly connected to the bottom end of the second spring 5713. A second anti-slip block 5715 is fixedly connected to the lower surface of the pressing plate 5714. The second spring 5713 generates elastic potential energy, causing the pressing plate 5714 and the second anti-slip block 5715 to press against the upper surface of the power cable, thus improving the clamping effect. When the wrapping plate 579 moves downwards, the first limiting rod 5711 and the locking plate 5710 move relative to the locking plate 5710's slot. During this downward movement, the second spring 5713 causes the pressing plate 5714 and the second anti-slip block 5715 to move against the upper surface of the power cable, thereby completing the clamping of the power cable.

[0039] The third embodiment, such as Figures 7-9 As shown, a third soft pad 63 is fixedly connected to the inner wall of the threaded connecting ring 62, and there are several third soft pads 63 evenly distributed. A spring piece 64 is fixedly connected to the inner wall of the threaded connecting ring 62, and a third fixing block 65 is fixedly connected to the end of the spring piece 64. An anti-slip plate 66 is fixedly connected to the side of the outer surface of the third fixing block 65 away from the spring piece 64. The threaded connecting ring 62 facilitates the installation and removal of the wire threading device 6 by the operator. When the power cable is relatively thin, the operator installs the wire threading device 6; when it is relatively thick, the operator removes the wire threading device 6. The wire threading device 6 prevents the thin power cable from deforming when moving. In use, when it is necessary to cut a thin power cable, the operator connects the threaded connecting ring 62 with the wire entry device 5 and the cutting device 7. After the power cable passes through the inner cavity of the wire threading tube 61, during cutting, the spring piece 64 causes the anti-slip plate 66 to move towards the outer surface of the power cable, thereby clamping the power cable.

[0040] A cutting device 7 is fixedly connected to the upper surface of the third fixing plate 4. By setting the cutting device 7, the end of the power cable can be cut after it has been clamped, thus completing the cutting operation of the power cable end. The cutting device 7 includes a second fixing frame 71, which is fixedly connected to the upper surface of the third fixing plate 4. A cable outlet box 72 is fixedly connected to the inner cavity of the second fixing frame 71. A second threaded ring 73 is fixedly connected to the inner cavity of the cable outlet box 72. The second threaded ring 73 is sleeved on the end of the cable tube 61 away from the cable inlet device 5. The second threaded ring 73 can be connected to the cutting device 7. A second limiting plate 74 is fixedly connected to the upper surface of the cable outlet box 72. A second limiting rod 75 is slidably connected to the inner cavity of the second limiting plate 74. The top surface of the inner ring of the second limiting rod 75 is fixedly connected to... A compression rod 76 is provided, and a cutting blade 77 is fixedly connected to the bottom end of the compression rod 76. A fourth fixing block 78 is fixedly connected to the inner wall of the outlet box 72. A limiting ring 79 is fixedly connected to the upper surface of the fourth fixing block 78. The limiting ring 79 is located directly below the cutting blade 77. The setting of the second limiting plate 74 can limit the second limiting rod 75, so that the cutting blade 77 can move vertically downward to cut the end of the power cable. The setting of the limiting ring 79 can limit the cutting blade 77 after the power cable is cut. In use, the operator places the end of the power cable directly above the limiting ring 79 and inserts the second limiting rod 75 into the inner cavity of the second limiting plate 74. By pressing the second limiting rod 75, the cutting blade 77 cuts the power cable directly below, thereby completing the cutting work of the power cable.

[0041] In use, the first threaded ring 53 is connected to the threaded connecting ring 62, and the end of the power cable is inserted into the inner cavity of the wire frame 52. Then, the power cable is inserted into the inner cavity of the wire threading device 6. Before the power cable is placed, the operator pulls the support rod 578, causing the sliding ring 574 to move upward on the outer surface of the hexagonal limiting post 572. After that, the power cable is placed. After the power cable is placed, the operator releases the support rod 578. Under the influence of the elastic potential energy stored in the first spring 577 and gravity, the sliding ring 574 moves downward, thereby causing the wrapping plate 579 to wrap the power cable.

[0042] When it is necessary to cut a thinner power cable, the operator connects the threaded connecting ring 62 to the wire entry device 5 and the cutting device 7. After the power cable is inserted into the inner cavity of the wire insertion tube 61, during the cutting process, the spring piece 64 will cause the anti-slip plate 66 to move towards the outer surface of the power cable, thereby clamping the power cable.

[0043] The operator places the end of the power cable directly above the limiting ring 79 and inserts the second limiting rod 75 into the inner cavity of the second limiting plate 74. By pressing the second limiting rod 75, the cutting blade 77 cuts the power cable directly below, thus completing the cutting of the power cable.

[0044] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A cutting device for processing power cables, comprising a base plate (1), wherein a first fixing plate (2) is fixedly connected to the side surface of the base plate (1), a second fixing plate (3) is fixedly connected to one end of the upper surface of the base plate (1), and a third fixing plate (4) is fixedly connected to the end of the upper surface of the base plate (1) away from the second fixing plate (3), characterized in that: The power cable cutting device also includes; The wire insertion device (5) includes a first fixing frame (51), which is fixedly connected to the upper surface of the second fixing plate (3). A wire insertion frame (52) is fixedly connected to the inner cavity of the first fixing frame (51), and a first threaded ring (53) is fixedly connected to the inner cavity of the wire insertion frame (52). The threading device (6) includes a threading tube (61), and threaded connecting rings (62) are fixedly connected to both ends of the threading tube (61), and one end of the threaded connecting ring (62) is threadedly connected to the inner cavity of the first threaded ring (53). The wire insertion device (5) also includes a clamping device (57), which includes a base (571). The base (571) is fixedly connected to the side of the first fixing plate (2) away from the bottom plate (1). A hexagonal limiting post (572) is fixedly connected to the axis of the upper surface of the base (571), and a top plate (573) is fixedly connected to the top of the hexagonal limiting post (572). The outer surface of the hexagonal limiting post (572) is slidably connected to a sliding ring (574), the outer surface of the sliding ring (574) is fixedly connected to a first fixing block (575), the upper surface of the first fixing block (575) is fixedly connected to a first spring (577), the top end of the first spring (577) is fixedly connected to the lower surface of the top plate (573), the lower surface of the first fixing block (575) is fixedly connected to a second soft pad (576), the second soft pad (576) is pressed and adapted to the upper surface of the base (571), and the wire frame (52) A first soft pad (54) is fixedly connected to the bottom surface of the inner cavity, and a first anti-slip block (55) is fixedly connected to the upper surface of the first soft pad (54). A first limiting plate (56) is fixedly connected to the upper surface of the wire frame (52). A support rod (578) is fixedly connected to the side of the outer surface of the first fixing block (575) away from the sliding ring (574). A wrapping plate (579) is fixedly connected to the end of the support rod (578) away from the first fixing block (575). The wrapping plate (579) is located directly above the first anti-slip block (55). The threaded connecting ring... A third soft pad (63) is fixedly connected to the inner wall of (62), and there are several third soft pads (63), and the several third soft pads (63) are evenly distributed. A spring piece (64) is fixedly connected to the inner wall of the threaded connecting ring (62). A third fixing block (65) is fixedly connected to the end of the spring piece (64). An anti-slip plate (66) is fixedly connected to the side of the outer surface of the third fixing block (65) away from the spring piece (64). A cutting device (7) is fixedly connected to the upper surface of the third fixing plate (4). The cutting device (7) includes a first Two fixed frames (71) are fixedly connected to the upper surface of the third fixed plate (4). A cable outlet box (72) is fixedly connected to the inner cavity of the second fixed frame (71). A second threaded ring (73) is fixedly connected to the inner cavity of the cable outlet box (72). The second threaded ring (73) is sleeved on the end of the cable conduit (61) away from the cable entry device (5). When the power cable is relatively thin, the operator installs the cable threading device. When it is relatively thick, the cable threading device is removed. The cable threading device can prevent the thinner power cable from deforming when it moves.

2. The cutting device for processing power cables according to claim 1, characterized in that: The side surfaces of the wrapping plate (579) are all fixedly connected with a positioning plate (5710). The positioning plate (5710) is pressed and adapted to the slot on the upper surface of the first limiting plate (56). The outer surface of the positioning plate (5710) is fixedly connected with a first limiting rod (5711). The first limiting rod (5711) is located at the round hole on the upper surface of the first limiting plate (56).

3. The cutting device for power cable processing according to claim 2, characterized in that: A second fixing block (5712) is fixedly connected to the top surface of the inner cavity of the wrapping plate (579). A second spring (5713) is fixedly connected to the lower surface of the second fixing block (5712). A pressing plate (5714) is fixedly connected to the bottom end of the second spring (5713). A second anti-slip block (5715) is fixedly connected to the lower surface of the pressing plate (5714).

4. The cutting device for processing power cables according to claim 1, characterized in that: A second limiting plate (74) is fixedly connected to the upper surface of the outlet box (72). A second limiting rod (75) is slidably connected to the inner cavity of the second limiting plate (74). A pressing rod (76) is fixedly connected to the top surface of the inner ring of the second limiting rod (75). A cutting blade (77) is fixedly connected to the bottom end of the pressing rod (76). A fourth fixing block (78) is fixedly connected to the inner wall of the outlet box (72). A limiting ring (79) is fixedly connected to the upper surface of the fourth fixing block (78). The limiting ring (79) is located directly below the cutting blade (77).

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