A nuclear power pipeline metal insulation layer cutting device

Abstract

The application discloses a nuclear power pipeline metal insulation layer cutting device, and relates to the technical field of metal cutting. The outer shell is provided with a main support, a main drive assembly is fixedly installed at the end of the main support away from the outer shell, a main driving wheel is fixedly installed on the output shaft of the main drive assembly, an inner main support is also fixedly installed on the outer shell, a rotating main shaft is rotatably installed on the inner main support, an eccentric cutter head is fixedly installed on the rotating main shaft, the eccentric cutter head is arranged between the inner main supports, the rotating center of the eccentric cutter head is located at the shaft center of the rotating main shaft, and the eccentric cutter head is eccentrically arranged on the rotating main shaft. The eccentric cutter head and the cutting tool are eccentrically arranged, the rotating range of the eccentric cutter head is limited by cooperating with the stop sliding block, the cutting depth of the device can be adjusted in depth.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal cutting, and particularly relates to a nuclear power pipeline metal thermal insulation layer cutting device. BACKGROUND

[0002] The pipeline thermal insulation layer is also called a heat pipeline thermal insulation layer, and usually plays a role of thermal insulation. In the prior art, the thermal insulation layer of the pipeline is usually composed of a shell and a filler, and the shell is generally made of a stainless steel sheet. Although most of the pipeline thermal insulation layers are preprocessed in a factory building, some small defects or gaps may still occur during actual installation, and the stainless steel sheet needs to be temporarily cut for repair.

[0003] In the process of cutting the stainless steel sheet, a person usually uses a cutter to scratch the stainless steel sheet, then tears the scratch to separate the stainless steel sheet, and finally uses a special edge pressing machine to press the edge of the stainless steel sheet. Otherwise, many burrs may appear at the cutting part of the stainless steel sheet, which is not conducive to welding or use.

[0004] A cutting device for stainless steel reinforcing sheet processing is disclosed in Chinese patent application No. CN113828937A. The device fixes the steel plate on the cutting table through the fixed mechanism to avoid the steel plate from shifting during cutting. The first displacement mechanism and the second displacement mechanism are used in combination to drive the laser cutting knife to move left and right and forward and backward, thereby improving the accuracy of the cutting operation and ensuring that the reinforcing sheet of appropriate size can be cut at one time, and greatly improving the work efficiency. The whole device uses a full-automatic cutting mode instead of a manual cutting mode, which not only saves time and effort but also reduces the labor intensity of personnel.

[0005] In the prior art, there is no device that can accurately determine the cutting depth according to the thickness of the stainless steel sheet. In the construction site, the cutting or tearing is usually performed after manual scratching. The quality of the shell assembled in this way is uncontrollable, and different thicknesses of stainless steel sheets are often used in the construction site. The specific cutting tool cannot determine the cutting depth, which may result in too many burrs or the inability to cut. SUMMARY

[0006] To solve the above technical problems, the application provides the following technical scheme.

[0007] The utility model provides a nuclear power pipeline metal insulation layer cutting device, including auxiliary base, shell, extension support, sheet, the auxiliary base is used for auxiliary cutting, the extension support is connected with shell through bolt, can separate extension support with shell after removing screw rod, both sides of shell are provided with handle, fixedly installed with main support on the shell, the one end of main support away from shell is fixedly installed with main drive assembly, fixedly installed driving wheel on the output shaft of main drive assembly, driving wheel is rotatably connected with shell, driving wheel can contact with sheet, also fixedly installed with internal main frame on the shell, rotatably installed with rotating main shaft on internal main frame, fixedly installed with eccentric cutter head on rotating main shaft, eccentric cutter head sets up between internal main frame, eccentric cutter head is cylindrical, the rotation center of eccentric cutter head is in the axle of rotating main shaft, eccentric cutter head is eccentric on rotating main shaft, fixedly installed with cutting tool on the outside of eccentric cutter head, the length of cutting tool is three fifths of the circumference of eccentric cutter head, also fixedly installed with collision lug on the outside of eccentric cutter head, collision lug is fixedly connected with cutting tool, also set up with support slide rail on internal main frame, support slide rail is arc, the axis of support slide rail coincides with the axis of rotating main shaft, also slidably installed with stop slide block on support slide rail, the both ends of stop slide block are fixedly installed with convex round bar.

[0008] Further, the shell also slidably installs double-toothed slide block, one end of the double-toothed slide block is provided with a ratchet, one end of the double-toothed slide block away from the shell is fixedly installed with a transverse sliding groove, the convex round bar is arranged in the transverse sliding groove, and the convex round bar can freely slide in the transverse sliding groove.

[0009] Further, the transverse sliding groove is fixedly installed with a vertical spring on the outer side, the other end of the vertical spring is fixedly installed on the shell, one side of the double-toothed slide block is provided with a sliding rack, the double-toothed slide block is meshingly installed with a first gear, the first gear is rotatably connected with the shell, one end of the first gear is fixedly installed with a first ratchet wheel, the shell is also fixedly installed with a gearbox, a pawl rod is fixedly installed on the output shaft of the gearbox, and a driving pawl is rotatably installed at one end of the pawl rod away from the output shaft of the gearbox.

[0010] Further, the driving pawl contacts the first ratchet wheel to drive the first ratchet wheel to rotate, the driving pawl and the first ratchet wheel can only transmit single-direction torque, a measuring gear is fixedly installed on the input end of the gearbox, a measuring rod is meshingly installed on the measuring gear, a side support is slidably installed on the measuring rod, the side support is fixedly connected with the shell, a measuring wheel is rotatably installed at one end of the measuring rod away from the shell, the measuring wheel can contact the sheet, a measuring spring is also fixedly installed on the measuring rod, and the other end of the measuring spring is fixedly installed on the side support.

[0011] Further, a recovery handle is slidably installed on the shell, a sliding vertical rod is fixedly installed on the recovery handle, a sliding vertical rod is slidably installed on the sliding vertical rod, a plurality of upper pawls are rotatably installed on the sliding vertical rod, a first torsion spring is fixedly installed on the upper pawl to reset, the other end of the first torsion spring is fixedly installed on the sliding vertical rod, a transverse spring is further fixedly installed on the sliding vertical rod to return to the initial position, and the other end of the transverse spring is fixedly connected with the shell.

[0012] Further, a plurality of inner rotating frames are rotatably installed at both ends of the rotating main shaft, a friction spring is fixedly installed on the inner rotating frame, the other end of the friction spring is fixedly connected with the rotating main shaft, a friction arc disc is rotatably installed at the end of the inner rotating frame away from the axis of the rotating main shaft, and a plurality of outer rotating cylinders are arranged at both ends of the rotating main shaft and are in frictional contact with the friction arc disc.

[0013] Further, a lower supporting plate is fixedly installed on the shell, the lower supporting plate is rotatably connected with the driving wheel, a transmission gear is rotatably installed on the lower supporting plate, a belt is arranged on the transmission gear, the other end of the belt is arranged on the outer rotating cylinder to transmit power, a main wheel gear is further meshingly installed on the transmission gear, and the main wheel gear is fixedly connected with the driving wheel.

[0014] Further, a screw rod is rotatably installed on the expansion support, a rear sliding frame is slidably installed on the expansion support, the rear sliding frame is threadedly connected with the screw rod, a dividing cutter is fixedly installed at the end of the rear sliding frame away from the expansion support, an upper pressing wheel is rotatably installed on the rear sliding frame, a lower pressing wheel is rotatably installed on the rear sliding frame, a predetermined gap is left between the upper pressing wheel and the lower pressing wheel, a rear worm wheel is further fixedly installed at one end of the screw rod, a rear worm is meshingly installed on the rear worm wheel, the rear worm is rotatably connected with the expansion support, a rear bevel gear is fixedly installed at the end of the rear worm away from the rear worm wheel, a rotating handle is rotatably installed on the expansion support, a passive bevel gear is fixedly installed at the end of the rotating handle close to the rear worm, and the passive bevel gear is in meshing engagement with the rear bevel gear.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: (1) the eccentric cutter and the cutting tool are eccentrically arranged, and the rotation range of the eccentric cutter is limited by the upper stopper sliding block, so that the cutting depth of the device can be adjusted; (2) the device can keep the state of the cutting tool through the double-toothed sliding block and the upper pawl, which facilitates the replacement of the sheet for the next round of cutting work and improves the work efficiency; (3) the thickness of the sheet is quickly detected through the movement of the measuring rod, the device can quickly position the cutting depth required, and manual adjustment is not needed, which ensures the cutting quality and improves the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure of the device is shown in the figure.

[0017] Figure 2 The auxiliary base, sheet, and shell of the device are shown in the figure.

[0018] Figure 3 The rear carriage structure of the device is shown in the figure.

[0019] Figure 4 The shell structure of the device is shown in the figure.

[0020] Figure 5 The Figure 4 The local enlarged view of point A in the figure.

[0021] Figure 6 The outer rotating cylinder structure of the device is shown in the figure.

[0022] Figure 7 The Figure 6 The local enlarged view of point B in the figure.

[0023] Figure 8 The Figure 6 The local enlarged view of point C in the figure.

[0024] Figure 9 The eccentric cutter head structure of the device is shown in the figure.

[0025] Figure 10 The support slide rail structure of the device is shown in the figure.

[0026] Figure 11 The first ratchet structure of the device is shown in the figure.

[0027] 101 - auxiliary base; 102 - extension support; 103 - screw rod; 104 - rear carriage; 105 - upper pressing wheel; 106 - lower pressing wheel; 107 - dividing cutter; 108 - rear worm gear; 109 - rear worm; 110 - rear bevel gear; 111 - rotating handle; 112 - sheet; 201 - driving wheel; 202 - main support; 203 - housing; 204 - restoring handle; 205 - sliding vertical rod; 206 - double-toothed sliding block; 207 - upper pawl; 208 - vertical spring; 209 - horizontal spring; 210 - measuring gear; 211 - measuring rod; 212 - side support; 213 - measuring spring; 214 - measuring wheel; 215 - stop sliding block; 216 - horizontal sliding groove; 218 - side edge support plate; 301 - eccentric cutter head; 302 - outer rotating cylinder; 303 - belt; 304 - inner rotating frame; 305 - friction arc disc; 306 - friction spring; 307 - rotating main shaft; 308 - collision protrusion; 309 - cutting cutter; 310 - inner main frame; 311 - support sliding rail; 312 - lower support plate; 313 - transmission gear; 314 - main wheel gear; 401 - first gear; 402 - first ratchet wheel; 403 - driving pawl; 404 - pawl rod; 405 - gearbox. DETAILED DESCRIPTION

[0028] As Figures 1 to 3As shown, a nuclear power pipeline metal insulation layer cutting device, including auxiliary base 101, shell 203, expansion bracket 102, sheet 112, the auxiliary base 101 is used to assist cutting, the expansion bracket 102 and shell 203 are connected through bolts, after the bolt is removed, the expansion bracket 102 and shell 203 can be separated, the both sides of shell 203 are provided with handle, a plurality of side support plates 218 are further fixedly installed on shell 203, the side support plate 218 can be contacted with sheet 112, so that the device and sheet 112 remain parallel, the screw rod 103 is rotatably installed on expansion bracket 102, the rear carriage 104 is further slidably installed on expansion bracket 102, the rear carriage 104 and screw rod 103 are connected through thread, the cutting tool 107 is fixedly installed on the end of rear carriage 104 away from expansion bracket 102, the upper pressure wheel 105 is rotatably installed on rear carriage 104, the lower pressure wheel 106 is rotatably installed on rear carriage 104, the gap with predetermined width is left between upper pressure wheel 105 and lower pressure wheel 106, the upper pressure wheel 105 and lower pressure wheel 106 are rotated in order to remove burrs on the sheet after cutting, the rear worm wheel 108 is further fixedly installed on one end of screw rod 103, the rear worm wheel 108 is engagedly installed on rear worm 109, the rear worm 109 is rotatably connected with expansion bracket 102, the rear bevel gear 110 is fixedly installed on the end of rear worm 109 away from rear worm wheel 108, the rotary handle 111 is further rotatably installed on expansion bracket 102, the passive bevel gear is fixedly installed on one end of rotary handle 111 close to rear worm 109, the passive bevel gear is engaged with rear bevel gear 110.

[0029] As Figure 2 , Figure 4 , Figure 6 , Figure 9 , Figure 10As shown, the housing 203 is fixedly installed with a main support 202, and the end of the main support 202 away from the housing 203 is fixedly installed with a main drive assembly, and the output shaft of the main drive assembly is fixedly installed with a driving wheel 201, and the driving wheel 201 is rotationally connected with the housing 203, and the driving wheel 201 can contact the sheet 112, and the housing 203 is also fixedly installed with an inner main frame 310, and the inner main frame 310 is rotationally installed with a rotating main shaft 307, and the rotating main shaft 307 is fixedly installed with an eccentric cutter head 301, and the eccentric cutter head 301 is arranged between the inner main frame 310, and the eccentric cutter head 301 is cylindrical, and the rotating center of the eccentric cutter head 301 is at the axis of the rotating main shaft 307, but the axis of the eccentric cutter head 301 does not coincide with the axis of the rotating main shaft 307, and the eccentric cutter head 301 is eccentrically arranged on the rotating main shaft 307, and the outer side of the eccentric cutter head 301 is fixedly installed with a cutting tool 309, and the length of the cutting tool 309 is three-fifths of the circumference of the eccentric cutter head 301, and the outer side of the eccentric cutter head 301 is also fixedly installed with a collision block 308, and the collision block 308 is fixedly connected with the cutting tool 309, and the purpose of this is to adjust the cutting depth according to the angle of rotation of the rotating main shaft 307 when the rotating main shaft 307 rotates.

[0030] As Figure 6 With Figures 8 to 10As shown, the two ends of the rotating main shaft 307 are rotatably installed with a plurality of inner rotating frames 304, the inner rotating frames 304 are fixedly installed with friction springs 306, the other end of the friction spring 306 is fixedly connected with the rotating main shaft 307, the end of the inner rotating frame 304 away from the axis of the rotating main shaft 307 is rotatably installed with a friction arc disc 305, the two ends of the rotating main shaft 307 are respectively provided with a plurality of outer rotating cylinders 302, the outer rotating cylinders 302 are in frictional contact with the friction arc disc 305, the lower support plate 312 is also fixedly installed on the shell 203, the lower support plate 312 is rotatably connected with the driving wheel 201, the transmission gear 313 is rotatably installed on the lower support plate 312, the belt 303 is provided on the transmission gear 313, the other end of the belt 303 is provided on the outer rotating cylinder 302 to transmit power, the main gear 314 is also meshingly installed on the transmission gear 313, the main gear 314 is fixedly connected with the driving wheel 201, here the inner rotating frame 304, the friction arc disc 305, the friction spring 306 and the outer rotating cylinder 302 are in the drum brake state, when the outer rotating cylinder 302 rotates, the outer rotating cylinder 302 will rotate together with the rotating main shaft 307 through the friction arc disc 305 and the inner rotating frame 304, when the rotating main shaft 307 is subjected to a force opposite to rotation, then the friction arc disc 305 and the outer rotating cylinder 302 start to slip, at this time the outer rotating cylinder 302 will not rotate with the rotating main shaft 307, the support slide rail 311 is also provided on the inner main frame 310, the support slide rail 311 is arc-shaped, the axis of the support slide rail 311 coincides with the axis of the rotating main shaft 307, the shape of the support slide rail 311 is the trajectory line when the eccentric cutter head 301 rotates, the stopper slide block 215 is also slidably installed on the support slide rail 311, the two ends of the stopper slide block 215 are fixedly installed with protruding round rods, the stopper slide block 215 can contact with the impact protruding block 308 when working.

[0031] As Figures 4 to 7 With Figure 11As shown, the shell 203 is also slidingly installed with a recovery handle 204, the recovery handle 204 is fixedly installed with a sliding vertical rod 205, the sliding vertical rod 205 is also slidingly installed with a sliding vertical rod 205, the sliding vertical rod 205 is rotatably installed with a plurality of upper pawls 207, the upper pawls 207 are fixedly installed with a first torsional spring for resetting, the other end of the first torsional spring is fixedly installed on the sliding vertical rod 205, the sliding vertical rod 205 is also fixedly installed with a transverse spring 209 for returning to the initial position, the other end of the transverse spring 209 is fixedly connected with the shell 203, the shell 203 is also slidingly installed with a double-toothed slider 206, one end of the double-toothed slider 206 close to the sliding vertical rod 205 is provided with a ratchet, the ratchet is in contact with the upper pawl 207, when the double-toothed slider 206 is in contact with the upper pawl 207, the double-toothed slider 206 can only move away from the shell 203, and cannot move close to the shell 203, one end of the double-toothed slider 206 away from the shell 203 is fixedly installed with a transverse sliding groove 216, the convex round bar is arranged in the transverse sliding groove 216 and can freely slide in the transverse sliding groove 216, the outer side of the transverse sliding groove 216 is fixedly installed with a vertical spring 208, the other end of the vertical spring 208 is fixedly installed on the shell 203, one side of the double-toothed slider 206 away from the sliding vertical rod 205 is provided with a sliding rack, the double-toothed slider 206 is meshingly installed with a first gear 401, the first gear 401 is rotatably connected with the shell 203, one end of the first gear 401 is fixedly installed with a first ratchet 402, the shell 203 is also fixedly installed with a gearbox 405, a pawl rod 404 is fixedly installed on the output shaft of the gearbox 405, a driving pawl 403 is rotatably installed on one end of the pawl rod 404 away from the output shaft of the gearbox 405, the driving pawl 403 is in contact with the first ratchet 402 to drive the first ratchet 402 to rotate, the driving pawl 403 and the first ratchet 402 can only transmit single-direction torque, a measuring gear 210 is fixedly installed on the input end of the gearbox 405, a measuring rod 211 is meshingly installed on the measuring gear 210, a side bracket 212 is slidingly installed on the measuring rod 211, the side bracket 212 is fixedly connected with the shell 203, a measuring wheel 214 is rotatably installed on one end of the measuring rod 211 away from the shell 203, the measuring wheel 214 can be in contact with the thin plate 112, a measuring spring 213 is also fixedly installed on the measuring rod 211, the other end of the measuring spring 213 is fixedly installed on the side bracket 212.

[0032] Working principle: the device can be separated from the shell 203 by disassembling the bolt, and the extension support 102 can only perform the function of cutting the scratch in the state of separating the shell 203, and cannot separate the whole sheet 112. When using the cutting scratch function alone, any auxiliary device is not needed. When using the extension support 102, it needs to be used with the auxiliary base 101. The working mode of cutting the scratch is explained below. When in use, the handle needs to be held by hand, and then the driving wheel 201 on the device is in contact with the sheet 112, and the side support plate 218 is in contact with the sheet 112. The side support plate 218 can keep the device parallel to the sheet 112. Note that the measuring wheel 214 should not be in contact with the sheet 112 at this time. Under the above condition, the device is manually pushed to move, and the purpose is to make the measuring wheel 214 in contact with the sheet 112. After that, the measuring wheel 214 will be extruded by the sheet 112 due to the thickness of the sheet 112. At this time, the measuring wheel 214 will compress the measuring spring 213, and the measuring wheel 214 will move towards the shell 203. At this time, the measuring rod 211 will rotate with the measuring gear 210. The measuring gear 210 inputs power into the gearbox 405, changes the speed through the gearbox 405, and then rotates the pawl rod 404 through the output shaft of the gearbox 405. The pawl rod 404 rotates the first gear 401 through the driving pawl 403 and the first ratchet wheel 402, so as to drive the double-toothed slider 206 to move away from the shell 203. The purpose is to make the horizontal sliding groove 216 move away from the shell 203 together, extrude the stop block 215 through the extrusion of the stop block 215, and make the stop block 215 slide on the support slide rail 311. The stop block 215 slides to confirm the range of rotation of the collision protrusion 308. When the stop block 215 slides to the predetermined distance on the support slide rail 311, the main drive assembly is started at this time, and the main drive assembly drives the driving wheel 201 to rotate. The main work of the driving wheel 201 is to drive the device or the sheet to move. When the driving wheel 201 rotates, the driving wheel 201 rotates the outer rotating cylinder 302 through the main wheel gear 314, the transmission gear 313 and the belt 303. The outer rotating cylinder 302 rotates the rotating shaft 307 and the eccentric cutter head 301 through the friction arc disc 305 and the inner rotating frame 304. At this time, the eccentric cutter head 301 begins to eccentrically rotate, and the cutting tool 309 gradually approaches the sheet 112 to prepare for cutting. The eccentric cutter head 301 will stop when the collision protrusion 308 contacts the stop block 215. At this time, the state of the eccentric cutter head 301 and the cutting tool 309 is the final cutting state required. At this time, the stop block 215 is clamped by the horizontal sliding groove 216 and the support slide rail 311, so the eccentric cutter head 301 cannot continue to rotate.Then the friction arc disc 305 and the outer rotating cylinder 302 start to slip, at this time the outer rotating cylinder 302 rotation will not take the rotating shaft 307 rotation.

[0033] After entering the cutting state, it is worth mentioning that at this time due to the need for work, the device needs to cut the same thickness of the sheet 112, if it needs to move the device, the state of the eccentric cutter head 301 on the device will not be restored to the original state due to the return of the measuring wheel 214 to the initial state, only when the artificial pulls the recovery handle 204, the upper pawl 207 on the sliding vertical rod 205 and the double-toothed slider 206 are in contact, the double-toothed slider 206 and the transverse sliding slot 216 will be restored to the initial position by the vertical spring 208, and the corresponding vertical spring 208 will also be squeezed and collided with the collision block 308 through the stop block 215, so that the collision block 308 returns to the initial position, and the double-toothed slider 206 is set to adapt to the working environment requirements, prevent the need to adjust again when cutting multiple non-consecutive sheets 112, and reduce the working efficiency.

[0034] The use process of the extension bracket 102 in the device is as follows: first, manually pull the cut sheet 112 into contact with the dividing cutter 107, then pull the sheet 112 into the space between the upper and lower pressure wheels 105 and 106, and then let the upper and lower pressure wheels 105 and 106 extrude the sheet 112. The upper and lower pressure wheels 105 and 106 in the device can be driven by an additional motor to automate the edge pressing work. When thicker materials are encountered, the material toughness is reduced, the rotating handle 111 is rotated, the rotating handle 111 drives the screw rod 103 through the rear bevel gear 110, the rear worm 109, and the rear worm gear 108, the rear sliding frame 104 moves away from the rear worm gear 108, and the inclination angle of the cut sheet 112 is reduced.

Claims

1. A nuclear power pipeline metal insulation layer cutting device, comprising an auxiliary base (101), a shell (203), an expansion support (102), and a sheet (112), the auxiliary base (101) is used to assist in cutting, the expansion support (102) is connected with the shell (203) through bolts, the expansion support (102) can be separated from the shell (203) after the bolts are removed, and handles are arranged on both sides of the shell (203), characterized in that: The outer shell (203) is fixedly installed with a main support (202), and the end of the main support (202) away from the outer shell (203) is fixedly installed with a main drive assembly. The output shaft of the main drive assembly is fixedly installed with a driving wheel (201), and the driving wheel (201) is rotatably connected with the outer shell (203). The driving wheel (201) can contact the sheet (112). The outer shell (203) is also fixedly installed with an inner main frame (310), and the inner main frame (310) is rotatably installed with a rotating main shaft (307). The rotating main shaft (307) is fixedly installed with an eccentric cutter head (301), and the eccentric cutter head (301) is arranged between the inner main frame (310). The eccentric cutter head (301) is cylindrical, and the center of rotation of the eccentric cutter head (301) is located at the axis of the rotating main shaft (307). The eccentric cutter head (301) is eccentrically arranged on the rotating main shaft (307). The outer side of the eccentric cutter head (301) is fixedly installed with a cutting tool (309), and the length of the cutting tool (309) is three-fifths of the circumference of the eccentric cutter head (301). The outer side of the eccentric cutter head (301) is also fixedly installed with a collision protrusion (308), and the collision protrusion (308) is fixedly connected with the cutting tool (309). The inner main frame (310) is also provided with a supporting slide rail (311), and the supporting slide rail (311) is arc-shaped. The axis of the supporting slide rail (311) coincides with the axis of the rotating main shaft (307). The supporting slide rail (311) is also slidably installed with a stopper sliding block (215), and the two ends of the stopper sliding block (215) are fixedly installed with protruding round rods. ​ The outer shell (203) is also slidably installed with a double-toothed sliding block (206), and one end of the double-toothed sliding block (206) is provided with a ratchet. The end of the double-toothed sliding block (206) away from the outer shell (203) is fixedly installed with a transverse sliding groove (216), and the protruding round rods are arranged in the transverse sliding groove (216) and can freely slide in the transverse sliding groove (216). The outer side of the transverse sliding groove (216) is fixedly installed with a vertical spring (208), and the other end of the vertical spring (208) is fixedly installed on the outer shell (203). One side of the double-toothed sliding block (206) is provided with a sliding rack, and the double-toothed sliding block (206) is meshingly installed with a first gear (401). The first gear (401) is rotatably connected with the outer shell (203), and one end of the first gear (401) is fixedly installed with a first ratchet wheel (402). The outer shell (203) is also fixedly installed with a gearbox (405), and the output shaft of the gearbox (405) is fixedly installed with a pawl rod (404). The end of the pawl rod (404) away from the output shaft of the gearbox (405) is rotatably installed with a driving pawl (403). The active pawl (403) is in contact with the first ratchet (402) to drive the first ratchet (402) to rotate, the active pawl (403) and the first ratchet (402) can only transmit unidirectional torque, the input end of the gearbox (405) is fixedly installed with a measuring gear (210), the measuring gear (210) is meshedly installed with a measuring rod (211), the measuring rod (211) is slidably installed with a side bracket (212), the side bracket (212) is fixedly connected with the shell (203), the end, away from the shell (203), of the measuring rod (211) is rotatably installed with a measuring wheel (214), the measuring wheel (214) can be in contact with the thin plate (112), the measuring rod (211) is further fixedly installed with a measuring spring (213), the other end of the measuring spring (213) is fixedly installed on the side bracket (212).

2. The nuclear power pipeline metal insulating layer cutting device according to claim 1, characterized in that: The shell (203) is further slidably installed with a recovery handle (204), the recovery handle (204) is fixedly installed with a sliding vertical rod (205), the sliding vertical rod (205) is further slidably installed with a sliding vertical rod (205), a plurality of upper pawls (207) are rotatably installed on the sliding vertical rod (205), the upper pawls (207) are fixedly installed with first torsional springs for resetting, the other end of the first torsional springs is fixedly installed on the sliding vertical rod (205), the sliding vertical rod (205) is further fixedly installed with a transverse spring (209) for returning to the initial position, the other end of the transverse spring (209) is fixedly connected with the shell (203).

3. The nuclear power pipeline metal insulating layer cutting device according to claim 1, characterized in that: The both ends of the rotating main shaft (307) are rotatably installed with a plurality of inner rotating frames (304), the inner rotating frames (304) are fixedly installed with friction springs (306), the other end of the friction springs (306) is fixedly connected with the rotating main shaft (307), the end, away from the axis of the rotating main shaft (307), of the inner rotating frame (304) is rotatably installed with a friction arc disc (305), the both ends of the rotating main shaft (307) are respectively provided with a plurality of outer rotating cylinders (302), the outer rotating cylinders (302) are in frictional contact with the friction arc disc (305).

4. The nuclear power pipeline metal insulating layer cutting device according to claim 1, characterized in that: The shell (203) is further fixedly installed with a lower supporting plate (312), the lower supporting plate (312) is rotatably connected with the driving wheel (201), the lower supporting plate (312) is rotatably installed with a transmission gear (313), the transmission gear (313) is provided with a belt (303), the other end of the belt (303) is arranged on the outer rotating cylinder (302) to transmit power, the transmission gear (313) is further meshedly installed with a main gear (314), the main gear (314) is fixedly connected with the driving wheel (201).

5. The nuclear power pipeline metal insulating layer cutting device according to claim 1, characterized in that: The expansion support (102) is rotationally installed with a screw rod (103), and is also slidably installed with a rear sliding frame (104), the rear sliding frame (104) is connected with the screw rod (103) through a thread, and is fixedly installed with a cutting tool (107) at an end away from the expansion support (102), the rear sliding frame (104) is also rotationally installed with an upper pressing wheel (105) and a lower pressing wheel (106), a gap with a predetermined width is left between the upper pressing wheel (105) and the lower pressing wheel (106), one end of the screw rod (103) is also fixedly installed with a rear worm wheel (108), the rear worm wheel (108) is meshingly installed with a rear worm (109), the rear worm (109) is rotationally connected with the expansion support (102), one end of the rear worm (109) away from the rear worm wheel (108) is fixedly installed with a rear bevel gear (110), the expansion support (102) is also rotationally installed with a rotating handle (111), one end of the rotating handle (111) close to the rear worm (109) is fixedly installed with a driven bevel gear, and the driven bevel gear is meshed with the rear bevel gear (110).

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