A cutting device for cutting a composite pipe material covering a branch hole of a steel pipe

Abstract

The present application relates to CIPP trenchless pipe repair after lining composite pipe opening technology, specifically to a cutting device for cutting composite pipe covering steel pipe branch hole, which comprises a feeding assembly, a center opening assembly, a revolution assembly and a circumferential cutting assembly, the feeding assembly comprises a base plate, a feeding platform, a feeding guide part and a feeding drive part, the feeding drive part drives the feeding platform to move relatively close to and away from the base plate, the center opening assembly comprises a center opening part, the revolution assembly comprises a revolution plate part, a revolution guide part and a revolution drive part, the revolution plate part is installed on the feeding platform through the revolution guide part, the circumferential cutting assembly comprises a cutting part, a circumferential cutting part mounting plate and a cutting drive part, the cutting device is simple in structure, can cut the composite pipe covering the branch pipe into a whole piece and carry it out of the pipe, and can adapt to the center opening part centering deviation.

Description

TECHNICAL FIELD

[0001] The present application relates to a cutting device for cutting a composite pipe material covering a branch pipe hole of a steel pipe, which comprises a feeding assembly, a center hole assembly, a revolution assembly and a circumferential cutting assembly, the feeding assembly comprises a base plate, a feeding platform, a feeding guide part and a feeding drive part, the feeding drive part drives the feeding platform to move relative to the base plate, the center hole assembly comprises a center hole part, the revolution assembly comprises a revolution plate part, a revolution guide part and a revolution drive part, the revolution plate part is installed on the feeding platform through the revolution guide part, the circumferential cutting assembly comprises a cutting part, a circumferential cutting part mounting plate and a cutting drive part, the cutting device has a simple structure, the composite pipe material covering the branch pipe can be cut and carried out of the pipe by using the cutting device, and the center hole part can be adapted to a centering deviation. BACKGROUND

[0002] In the aspect of trenchless pipe repair, the CIPP method is to attach a layer of fiber or fabric reinforced composite pipe material in the pipe to be repaired, generally, one side of the composite pipe material in contact with the pipe to be repaired is an adhesive for bonding, and the inner wall of the composite pipe material is a permeation-resistant film. When the pipe to be repaired by the CIPP method has a branch pipe, the composite pipe material of the inner lining needs to be cut at the original pipe branch hole position after CIPP repair to ensure that the repaired branch pipe is unobstructed. When the pipe diameter is large, the staff can enter the pipe to cut the composite pipe material of the inner lining at the branch pipe position, but when the pipe diameter is small, the staff cannot enter the pipe, and a special pipe robot needs to be developed to cut the composite pipe material of the inner lining at the branch pipe joint position. Generally, after cutting the circumferential composite pipe material covering the branch pipe opening, the cut composite pipe material falls into the pipe and needs to be cleaned (or recovered) to prevent residual pieces, residues and other debris from blocking the pipe and facilitate subsequent cutting.

[0003] At present, the pipe robot cutting the inner lining composite pipe material in the pipeline repair industry at home and abroad all adopts the remote control, high-speed rotating pneumatic milling cutter head to cut the inner lining pipe material. During the operation process, the operator generally remotely controls the cutting outside the pipeline, and controls the mechanical arm to cut the composite pipe material near the edge of the branch pipe hole. Since the motion track of the milling cutter head is completely remotely controlled by the operator, on the one hand, the cut branch line opening edge part of the composite pipe material is not neat, and on the other hand, the operator is easy to damage the repaired composite pipe material inner surface around the branch pipe. In addition, this cutting method cuts the composite pipe material to be cut into irregular fragments or powders, and cannot carry the cut composite pipe material out of the pipeline. The difficulty of manual remote control cutting and removing the fragments is large, and the operator is easy to make operation errors. In order to keep the pipeline clean and facilitate the walking of the cutting robot in the pipeline, the cutting device is preferably capable of cutting the composite pipe material along the circumference of the branch pipe opening and carrying the cut piece-shaped composite pipe material out of the tube.

[0004] In view of the above problems, the present application discloses a cutting device for cutting the composite pipe material covering the branch pipe hole of the steel pipe, which can cut the composite pipe material covering the branch pipe opening position in a whole piece and carry it out of the tube. The application of the cutting device is beneficial to realize the automation of cutting and computer-aided cutting during the opening. SUMMARY

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present application is to provide a cutting device for cutting the composite pipe material covering the branch pipe hole of the steel pipe. The solution is that the cutting device for cutting the composite pipe material covering the branch pipe hole of the steel pipe comprises a feeding assembly, a center opening assembly, a revolution assembly and a circumferential cutting assembly.

[0006] The feeding assembly comprises a bottom plate, a feeding platform, a feeding guide part and a feeding drive part. The feeding platform is installed on the bottom plate through the feeding guide part. The bottom plate and the feeding platform are plate-shaped or frame-shaped structures. The feeding drive part is directly or indirectly connected or contacted with the bottom plate and the feeding platform. The feeding drive part drives the feeding platform to move relatively to the bottom plate. The feeding guide part ensures that the feeding movement of the feeding platform is translational. The feeding assembly comprises a sensor for detecting the feeding position of the feeding platform.

[0007] The center hole assembly comprises a center hole component mounted on the feeding platform directly or indirectly, the center hole component is a conical or drill bit shaped component capable of piercing the composite pipe by translation or drilling through the composite pipe by the combination of rotation and translation, the length direction of the center hole component is parallel to the feeding direction of the feeding platform, when the center hole component drills through the composite pipe by the combination of rotation and translation, the center hole assembly further comprises a center hole driving component mounted on the feeding platform, the center hole driving component drives the center hole component to rotate around its axis, in order to prevent the cut sheet-shaped composite pipe from falling off the center hole component, the center hole component has a blocking structure to prevent the sheet-shaped composite pipe from falling off the center hole component, the blocking structure is an end structure thicker than the main body of the center hole component.

[0008] The revolution assembly comprises a revolution plate component, a revolution guide component and a revolution driving component, the revolution plate component is mounted on the feeding platform through the revolution guide component, and the revolution driving component drives the revolution plate component to rotate around an axis parallel to the feeding direction of the feeding platform.

[0009] The circumferential cutting assembly comprises a circumferential cutting component mounting plate, a circumferential cutting component and a circumferential cutting driving component, the circumferential cutting component mounting plate is swing or translation mounted on the revolution plate component, the plane of the movement of the circumferential cutting component mounting plate is perpendicular to the feeding direction of the feeding platform, the swing circumferential cutting component mounting plate is a plate or frame shaped component capable of swinging around a point on it, the translation of the translation circumferential cutting component mounting plate is a reciprocating movement in the outward radial direction of the rotation axis of the revolution plate component, the circumferential cutting component is a component capable of realizing radial cutting, preferably a milling cutter shaped component, the circumferential cutting component is mounted on the circumferential cutting component mounting plate, the length direction of the circumferential cutting component is parallel to the feeding direction, the circumferential cutting driving component is mounted on the feeding platform, the revolution plate component or the circumferential cutting component mounting plate, and the circumferential cutting driving component is a component for driving the circumferential cutting component to rotate.

[0010] The cutting device for cutting the composite pipe covering the branch hole of the steel pipe comprises a cutting track control component for controlling the distance range between the circumferential cutting component and the center hole component and the force for moving away from the center hole component during the cutting of the composite pipe by the circumferential cutting component, the cutting track control component is mounted on the base plate or the revolution plate component and in contact or connected with the circumferential cutting component mounting plate, the cutting track control component uses a cylinder or a contact limiting component to keep the circumferential cutting component and the center hole component closest before starting to cut the composite pipe, and uses a cylinder, a spring or other elastic component to apply a force to the circumferential cutting component away from the center hole component during the cutting process.

[0011] When the cutting device is used to cut the composite pipe material covering the hole in the steel pipe with hole, the center hole component is aligned with the center position or the center position near the center position of the composite pipe material to be cut at the branch hole opening position along the radial direction of the steel pipe, the feeding driving component drives the feeding platform to feed to the composite pipe material to be cut, the center hole component contacts the composite pipe material covering the hole, the feeding platform continues to feed, the center hole driving component drives the center hole component to open a hole near the center of the composite pipe material, the circular cutting driving component drives the circular cutting component to rotate, the circular cutting component also cuts a hole on the composite pipe material to be cut, the revolution driving component drives the revolution plate component to revolve, the circular cutting driving component drives the circular cutting component to rotate, the circular cutting component rotates on one hand and revolves with the revolution plate on the other hand, the circular cutting component revolves with the revolution plate component for at least one more revolution to cut the composite pipe material in a circle, so that the circular cutting component finally forms a closed circular cutting track to cut the composite pipe material at the branch position, during the whole cutting process, the height of the feeding platform driven by the feeding driving component ensures that the center hole component and the circular cutting component always penetrate the composite pipe material to be cut, after cutting, the feeding platform of the feeding assembly moves towards the base plate, and the circular composite pipe material cut is strung on the center hole component, which is convenient for taking out of the pipe. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 FIG. 1 is a three-dimensional structural schematic diagram of the cutting device for cutting the composite pipe material covering the branch hole of the steel pipe according to the present application.

[0013] Figure 2 FIG. 2 is a left view structural schematic diagram of the cutting device for cutting the composite pipe material covering the branch hole of the steel pipe according to the present application.

[0014] Figure 3 FIG. 3 is a top view structural schematic diagram of the cutting device for cutting the composite pipe material covering the branch hole of the steel pipe according to the present application.

[0015] Figure 4 FIG. 4 is a partial structural schematic diagram of the cutting device for cutting the composite pipe material covering the branch hole of the steel pipe according to the present application.

[0016] Figure 5 FIG. 5 is a schematic diagram of the feeding assembly of the cutting device for cutting the composite pipe material covering the branch hole of the steel pipe according to the present application.

[0017] Figure 6 FIG. 6 is a structural schematic diagram of the revolution assembly and the circular cutting component mounting plate of the cutting device for cutting the composite pipe material covering the branch hole of the steel pipe according to the present application.

[0018] Figure 7 Structure diagram of the center hole assembly and the circumferential cutting assembly contacted with the composite pipe fed by the feeding platform of the cutting device for cutting the composite pipe covering the branch hole of the steel pipe of embodiment 1 of the present application.

[0019] Figure 8 Structure diagram of the center hole assembly and the circumferential cutting assembly contacted with the composite pipe fed by the feeding platform of the cutting device for cutting the composite pipe covering the branch hole of the steel pipe of embodiment 1 of the present application.

[0020] In the figure: 1. base plate 10. air bag 110. fixed hinge support 111. hinge connecting rod set 112. feeding guide rail 113. movable hinge support 114. hinge support mounting slider 12. feeding guide rod 13. spring 2. center hole assembly 21. drill bit 210. center hole motor 213. coupling 22. driven pulley 23. milling cutter 24. limit rod mounting support assembly 241. limit rod 25. tension pulley 251. tension pulley fixing plate 260. primary synchronous belt 261. secondary synchronous belt 27. milling cutter fixing plate 28. cushion block 30. feeding platform 300. revolution guide component 31. revolution plate component 311. circumferential cutting component mounting plate 320. revolution motor 321. pinion 322. gear 40. composite pipe 41. pipe wall 42. hole wall 5. stop block component DETAILED DESCRIPTION

[0021] The following gives several specific embodiments of the cutting device for cutting the composite pipe covering the branch hole of the steel pipe of the present application in combination with the figure legend, which are only illustrative of the present application and do not constitute a limitation on the claims of the present application, and the unmentioned part of the present application is applicable to the prior art.

[0022] Embodiment 1 of the cutting device for cutting the composite pipe covering the branch hole of the steel pipe of the present application (as shown in Figures 1-7 ).

[0023] The cutting device for cutting the composite pipe covering the branch hole of the steel pipe, characterized in that it comprises a feeding assembly, a center hole assembly, a revolution assembly and a circumferential cutting assembly.

[0024] The feeding assembly comprises a base plate 1, a feeding platform 30, a feeding guide component and a feeding drive component, the base plate 1 is a plate-shaped component (excluding the frame-shaped component), the feeding platform 30 is a plate-shaped component (excluding the frame-shaped component), and the feeding platform 30 is mounted on the base plate 1 through the feeding guide component, as Figure 1 , 5As shown, the feeding guide component includes feeding guide rails 112, hinge support mounting sliders 114, fixed hinge supports 110, movable hinge supports 113 and hinge linkages 111, four feeding guide rails 112 are respectively installed on the base plate 1 and the feeding platform 30, the hinge support mounting sliders 114 are slidingly assembled on the feeding guide rails 112, the four movable hinge supports 113 are installed on the hinge support mounting sliders 114, the four fixed hinge supports 110 are respectively installed on the base plate 1 and the feeding platform 30, the hinge linkages connect the fixed hinge supports 110 and the movable hinge supports 113 to form a lifting guide structure of a scissor structure, so as to ensure that the feeding platform 30 and the base plate 1 remain parallel when the distance between the feeding platform 30 and the base plate 1 changes.

[0025] It is not excluded that other structures of the feeding guide component are adopted, for example, a feeding guide rod 12 in a guide rod and slider structure can be adopted, the feeding guide rod 12 is a rod-shaped component with linear bearings, two groups of linear bearings and guide rods are respectively installed on the feeding platform 30 and the base plate 1, and the guide rod passes through the linear bearings, so that the feeding platform 30 and the base plate 1 can also remain parallel when the distance between the feeding platform 30 and the base plate 1 changes, as long as the guide structure can make the feeding platform 30 and the base plate 1 remain parallel when the distance between the feeding platform 30 and the base plate 1 changes.

[0026] The feeding drive component includes an air bag 10 and a spring 13, the air bag 10 is located between the base plate 1 and the feeding platform 30 and indirectly contacts the feeding platform 30 through a center-bored motor 210 installed on the feeding platform 30, when the air bag is inflated, the center-bored motor 20 is pushed away from the base plate 1, and the feeding platform 30 is parallelly away from the base plate 1 through the guidance of the feeding guide component. In order that the feeding platform 30 can automatically approach the base plate 1 after the air bag 10 stops driving, a tension spring 13 is installed between the feeding platform 30 and the base plate 1, when the air bag driving the feeding component 10 is deflated, the feeding platform automatically approaches the base plate 1 and is retracted through the pulling force of the tension spring 13, the pulling force of the spring 13 is greater than the gravity of the feeding platform 30 and all components installed on the feeding platform 30, so that the feeding platform can be automatically retracted in any direction.

[0027] In order to detect the feeding position of the feeding platform 30, a pull wire displacement sensor is installed between the base plate 1 and the feeding platform 30, when the feeding platform 30 moves, the feeding amount of the feeding platform can be detected, so as to facilitate the control of the feeding amount of the feeding platform by adjusting the inflation amount of the air bag 10, of course, other detection forms for detecting the feeding displacement of the feeding platform 30 are not excluded, for example, a direct current electric push rod with position detection, an optical sensor and other methods can be used.

[0028] The center hole assembly includes a center hole component and a center hole driving component. A drill bit 21 with a triangular tip is used as the center hole component. The triangular tip has a larger circumferential profile than the diameter of the drill shank. The triangular tip at the end of the drill bit 21 serves as a blocking structure for the center hole component to prevent the cut sheet composite pipe from falling off the center hole component. The drill bit 21 is installed on the motor shaft of the center hole motor 210 through a coupling 213. The center hole motor 210 is installed below the feed platform 30 as the center hole driving component. The center hole motor 210 drives the drill bit 21 to rotate. The air bag 10 drives the feed platform 30 to bring the drill bit 21 into contact with the composite pipe. The center hole motor 210 drives the drill bit 21 to rotate, so that the drill bit 21 can center hole the composite pipe. It is not excluded that the center hole assembly only has a center hole component. For example, the center hole component is replaced by a piercing component similar to a triangular scraper tip-shaped cutting edge. The center hole motor 210 is not configured. When the air bag drives the feed platform 30 to rise, the piercing component directly pierces the composite material pipe. In addition to using the triangular end of the triangular drill as the blocking structure, similar to the barb, the elastic sheet structure extending radially along the drill bit, etc. can be used as the blocking structure. As long as the end structure is thicker than the main body of the center hole component, it can be used as the blocking structure. Although the drill bit 21 is directly installed on the shaft of the center hole motor 210 through the coupling in this embodiment, it is not excluded that both are installed on the feed platform 30, and then driven by transmission such as belt, chain or gear.

[0029] The revolution assembly includes a revolution plate component, a revolution guide component and a revolution driving component, as shown in Figure 6 The revolution plate component 31 is a circular hollow plate-shaped component (of course, it is not excluded that other shapes such as fan-shaped, semi-circular ring-shaped or other shapes of the revolution plate component are used). The revolution plate component 31 is installed on the revolution guide component 300. The revolution guide component 300 is a circular ring-shaped component with a bearing on the outer ring. The revolution guide component 300 is installed on the feed platform 30. The inner ring of the revolution plate component 31 cooperates with the outer ring of the bearing of the revolution guide component 300 and is installed on the feed platform 30 through the revolution guide component 300. It can rotate relative to the feed platform 30. The revolution driving component includes a revolution motor 320 installed below the feed platform 30, a pinion 321 installed on the motor shaft of the revolution motor 320 and a large gear 322 installed below the revolution plate component. The pinion 321 is engaged with the large gear 322. The revolution motor 320 drives the pinion 321 to rotate. The pinion 321 transmits power to the large gear 322. The large gear 322 rotates to drive the revolution plate component 31 to rotate around the center of the drill bit 21. This rotation is also called revolution around the center hole component.

[0030] The circumferential cutting assembly includes a circumferential cutting component mounting plate, a circumferential cutting component and a circumferential cutting driving component.

[0031] The circumferential cutting component mounting plate 311 is a plate-shaped (not excluding frame-shaped) component, one end of which is hinged to the revolution plate component 31 and can swing in a plane parallel to the revolution plate component 31 around the hinged center point, the circumferential cutting component is a milling cutter 23, which is rotatably mounted on the other end of the circumferential cutting component mounting plate 311 away from the hinged end through a bearing, in order to improve the stability of the milling cutter 23, a milling cutter fixing plate 27 parallel to the circumferential cutting component mounting plate 311 is mounted on the circumferential cutting component mounting plate 311 to jointly guide the rotation of the milling cutter 23, the milling cutter fixing plate 27 is mounted on the circumferential cutting component mounting plate 311 through a pad 28, and the milling cutter 23 is jointly supported through bearings mounted on the circumferential cutting component mounting plate 311 and the milling cutter fixing plate 27.

[0032] The circumferential cutting driving component includes a driven pulley 22 and a center hole motor 210, the driven pulley 22 is a synchronous pulley with a bearing mounted on the inner ring, the driven pulley 22 is mounted on the revolution plate component 31, the rotation center of the driven pulley 22 is the swing center of the circumferential cutting component mounting plate 311 (the hinged center of the circumferential cutting component mounting plate 311 and the feed platform 30), the center hole driving motor 210 not only serves as a center hole driving component, but also drives the milling cutter 23 to rotate as a circumferential cutting driving component. The center hole motor 210 drives the drill bit 21 to rotate, the drill bit 21 transmits motion to the driven pulley 22 through the pulley sleeved on the drill bit 21 and the first synchronous belt 260, the driven pulley 22 transmits motion to the milling cutter 23 through the second synchronous belt 261, and drives the milling cutter 23 to rotate to open a hole in the composite pipe. The revolution motor 320 drives the revolution plate component 31 to revolve around the drill bit 21, the circumferential cutting component mounting plate 311 and the driven pulley 22 mounted on the revolution plate component 31 revolve around the drill bit 21, and the milling cutter 23 mounted on the circumferential cutting component mounting plate 311 revolves around the drill bit 21, as the circumferential cutting driving component drives the milling cutter 23 to cut the composite pipe circumferentially, the resistance of the composite pipe to the milling cutter 23 and the component force generated by the milling cutter 23 cutting the composite pipe make the milling cutter 23 and the circumferential cutting component mounting plate 31 not only revolve around the drill bit 21, but also swing outward relative to the revolution plate component 31 around the rotation center of the circumferential cutting component mounting plate 311, which is also called that the circumferential cutting component mounting plate 311 swings in the direction of increasing the radius of revolution, until the milling cutter 23 closely contacts the edge of the steel pipe flange of the steel pipe flange opening, so that the milling cutter 23 forms a circumferential trajectory cutting the composite pipe with adaptive diameter change.

[0033] In order to prevent the slippage of the synchronous belt 260 between the drill bit 21 and the driven pulley 22 during the circumferential cutting of the composite pipe by the milling cutter 23, a tension pulley 25 is added between the drill bit 21 and the driven pulley 22. The tension pulley 25 is a synchronous pulley with a bearing in the inner ring. The tension pulley 25 is installed on the tension pulley fixing plate 251, which can rotate relative to the tension pulley 25. The tension pulley fixing plate 251 is a plate-shaped component, which is installed on the revolving plate component 31.

[0034] Although the milling cutter is used as the circumferential cutting component in the embodiment, other tools with radial cutting function, such as two-edged or three-edged tools with outer cutting edges, can be used instead of the milling cutter as the circumferential cutting component.

[0035] When the cutting device is used to cut the composite pipe covering the hole in the steel pipe with holes, the cutting device is first carried by the carrier to the pipe with the branch hole, and then the sensor carried by the carrier is used to detect and scan the position of the branch hole, so that the drill bit 21 is aligned with the center of the branch hole or near the center, and the cutting of the composite pipe covering the hole is started. After the air bag 10 is inflated to drive the feeding platform 30 to move radially along the steel pipe, the drill bit 21 is fed to the composite pipe to be cut and contacts the composite pipe covering the hole. The feeding platform continues to feed, the center hole motor 210 drives the drill bit 21 to drill a hole near the center of the composite pipe, and the milling cutter also cuts a hole in the composite pipe to be cut. The revolving motor 320 drives the revolving plate component 31 to revolve, the milling cutter 23 revolves around the revolving plate, and at the same time, the milling cutter 23 also swings around the swing center of the circumferential cutting component mounting plate 311. The milling cutter 23 revolves at least one circle with the revolving plate component 31, until the composite pipe is cut through one circle, and the milling cutter 23 finally forms a closed circumferential cutting track to cut off the composite pipe at the branch hole position. When the milling cutter 23 starts cutting from a certain point of the composite pipe, the milling cutter 23 gradually approaches the hole wall of the branch pipe hole, Figure 8 The milling cutter cuts a track. During the whole cutting process, the height of the feeding platform 30 ensures that the drill bit 21 and the milling cutter 23 always penetrate the composite pipe to be cut. After cutting, the feeding platform 30 moves towards the base plate 1, and the cut circular composite pipe is carried out of the steel pipe by the drill bit 21.

[0036] In order to let the milling cutter 23 start cutting from a position with a small revolving radius, a stop block component 5 is installed on the side of the base plate 1. The stop block component 5 is a bent plate-shaped component. Before the air bag 10 starts to drive the feeding platform 30 to feed, the upper edge of the stop block component 5 is flush with the upper edge of the circumferential cutting component mounting plate 311. When the circumferential cutting component mounting plate 311 revolves counterclockwise with the revolving plate component 31, the milling cutter 23 will be stopped by the stop block component 5 when it reaches the position with a small revolving radius. Figure 3As shown, due to the limiting of the stopper part 5, the end of the circumferential cutting part mounting plate 311 installed with the milling cutter 23 is pushed by the stopper part 5 to swing in the direction close to the drill bit 21, the revolution radius of the milling cutter 23 rotating with the revolution plate part 31 is reduced, which is equivalent to the distance between the milling cutter 23 and the drill bit 21 is reduced, when the distance between the milling cutter 23 and the drill bit 21 is reduced to a certain range, the revolution driving motor 320 stops driving, the milling cutter 23 and the circumferential cutting part mounting plate 311 stop revolution, the air bag 10 starts to drive the feeding platform 30 to feed, when the drill bit 21 and the milling cutter 23 both pass through the composite pipe, the bottom surface of the circumferential cutting part mounting plate 311 is higher than the top of the stopper part 5, the circumferential cutting part mounting plate 311 can swing outward in the cutting process to make the distance between the milling cutter 23 and the drill bit 21 gradually increase, which can adapt to the opening operation of the smaller diameter branch pipe, and is also beneficial to improve the adaptability to the drill bit deviating from the branch pipe opening center during opening, even if the drill bit has a certain deviation from the branch pipe opening center, the milling cutter can also ensure that it can pass through the composite pipe at the branch pipe opening.

[0037] In the process of cutting the composite pipe by the milling cutter, the revolving plate component 31 applies a pushing force to the circumferential cutting component mounting plate 311 through the oscillation center of the circumferential cutting component mounting plate 311, and when the circumferential cutting component mounting plate 311 swings outward at a large angle, the pushing force will make the milling cutter 23 swing away from the drill bit 21. At the same time, the cutting force generated by the right-hand milling cutter during the rotation milling will also make the milling cutter 23 swing in the direction of the large revolution radius (away from the drill bit 21). In order to improve the force of the circumferential cutting component mounting plate 311 swinging in the direction of the increasing revolution radius (away from the drill bit 21) when the circumferential cutting component mounting plate 311 is close to the drill bit 21 from the milling cutter 23, and at the same time to limit the maximum revolution radius of the circumferential cutting component mounting plate 311 swinging, an outward swinging pushing device is arranged between the circumferential cutting component mounting plate 311 and the revolving plate component 31. The outward swinging pushing device includes a limiting rod mounting support assembly 24 and a limiting rod 241 as the oscillation limiting component of the circumferential cutting component mounting plate 311, which are installed on the circumferential cutting component mounting plate 311 and the revolving plate component 31. The limiting rod mounting support assembly 24 is a pair of bent plate components, one support of the limiting rod mounting support assembly 24 is installed on the circumferential cutting component mounting plate 311, and the other support of the limiting rod mounting support assembly 24 is installed on the revolving plate component 31. The limiting rod 241 is a rod-shaped component with a spring, which is inserted into the two supports of the limiting rod mounting support assembly 24. The hole on the limiting rod mounting support assembly 24 is in clearance fit with the limiting rod 241. When the revolving drive motor 230 starts to drive the revolving plate component 31 to revolve, the revolution radius of the milling cutter 23 and the circumferential cutting component mounting plate 311 is small, at this time, the spring on the limiting rod 241 is in a compressed state between the two limiting rod mounting supports. The pushing force of the spring on the limiting rod 241 to the circumferential cutting component mounting plate 311 through the limiting rod mounting support assembly 24 makes the circumferential cutting component mounting plate 311 swing outward (away from the drill bit). As the cutting process proceeds, the revolution radius of the milling cutter 23 installed on the circumferential cutting component mounting plate 311 gradually increases. In order to limit the revolution radius of the milling cutter 23 installed on the circumferential cutting component mounting plate 311, a nut is installed on the limiting rod 241 as an axial limiting element to limit the maximum distance between the two supports of the limiting rod mounting support assembly 24, thereby limiting the maximum revolution radius of the milling cutter.

[0038] The stop block component 5 and the outward swinging pushing device are both cutting track control components, which are used to control the distance range between the milling cutter and the drill bit and the force of the milling cutter swinging away from the drill bit. The greater the force of the milling cutter swinging away from the drill bit, the faster the speed of the milling cutter contacting the branch line opening pipe wall during the cutting process.

[0039] When the cutting device is used to cut the composite pipe material covering the branch hole in the steel pipe with branch hole, the composite pipe material 40 covering the hole in the steel pipe with hole is shown in Figure 8 The milling cutter 23 starts cutting from a point of the composite pipe material 40 covering the hole, and the point is within the edge of the branch hole. During the circumferential cutting of the milling cutter 23, the milling cutter 23 gradually approaches the hole wall 42 until the composite pipe material 40 covering the branch hole is cut off by circumferential cutting along the edge of the hole wall 42, Figure 8 The arrow in the figure indicates the moving direction of the milling cutter 23 during the circumferential cutting of the composite pipe material 40 covering the hole, Figure 8 The arc segment on the circumference inside the circumference in the figure represents the track of the gradually increasing cutting diameter of the milling cutter when the milling cutter starts cutting the composite pipe material.

[0040] Embodiment 2 of the cutting device for cutting the composite pipe material covering the branch hole of the steel pipe:

[0041] The difference between the embodiment and embodiment 1 is that:

[0042] The tapered part with barb is used as the center hole part. When the feeding platform 30 is fed, the center hole part directly penetrates the composite pipe material, and the barb can prevent the cut piece of the composite pipe material from falling off the tapered part after cutting. The barb as the blocking structure of the center hole part is used to prevent the cut piece of the composite pipe material from falling off the center hole part. In addition to the triangular drill and the tapered part, any part that can penetrate the composite pipe material can be used as the center hole part.

[0043] The feeding driving part is replaced by the feeding cylinder instead of the air bag 10. The feeding cylinder is fixedly installed on the bottom plate 1, and the cylinder rod of the feeding cylinder is on the feeding platform 30. If the cylinder rod of the feeding cylinder is connected with the feeding platform 30, the feeding cylinder can not only drive the feeding platform 30 away from the bottom plate 1, but also drive the feeding platform to approach the bottom plate. Thus, the spring 13 in embodiment 1 can also be replaced. Of course, a rotary motor and a lead screw can also be used as the feeding driving part. These driving modes have wide application in lifting platforms.

[0044] The revolution plate part is cancelled, and the driven pulley 22 and the swing plate part 311 are installed on the large gear 322. The inner ring of the large gear 322 is sleeved with a bearing, and the outer ring of the bearing is matched with the revolution guide part 300.

[0045] A separate milling cutter driving motor is installed on the revolution plate part 31 or the circumferential cutting part installation plate 311 at the position of the driven pulley 22 in embodiment 1 as the circumferential cutting driving part. The milling cutter driving motor drives the milling cutter by chain transmission. A conductive slip ring is installed on the revolution guide part to supply power to the milling cutter driving motor. It is not excluded that the milling cutter driving motor is replaced by a pneumatic motor as the circumferential cutting driving part, and a gas slip ring is installed on the revolution guide part to supply gas to the pneumatic motor.

[0046] A cylinder is used as a cutting trajectory control component to replace the block component 5, the limit rod mounting support assembly 24 and the limit rod 241 in Example 1, and the cylinder is fixed on the revolution plate component 31. The cylinder rod is connected to the circumferential cutting component mounting plate 311. During the cutting process, the cylinder rod extends to push the circumferential cutting component mounting plate 311 to drive the milling cutter to swing in the direction of increasing revolution radius (the direction of increasing distance from the center opening component). When the cylinder reaches the maximum stroke, the circumferential cutting component mounting plate 311 drives the milling cutter 23 to the position of the maximum revolution radius. Before the milling cutter starts to cut the composite pipe, the cylinder rod retracts and pulls the circumferential cutting component mounting plate 311 to swing in the direction of reducing the milling cutter revolution radius, so that the distance between the milling cutter and the center opening component is closest. Even if the center opening component is not positioned at the center position of the branch opening to be cut, the milling cutter can pass through the composite pipe within the range of the branch opening.

[0047] Embodiment 3 of the present invention's cutting device for cutting a composite pipe covering a branch hole of a steel pipe:

[0048] The difference between this embodiment and embodiment 1 is that:

[0049] A radial guide rail slider assembly is installed on the revolving plate component 31 along the radial direction of the drill bit. The milling cutter serving as the circumferential cutting component and the milling cutter drive motor serving as the circumferential cutting drive component are both fixed on the circumferential cutting component mounting plate. The circumferential cutting component mounting plate is fixed on the radial slider. The position of the cutting component mounting plate is adjusted by the cylinder installed on the revolving plate component 31. Before starting to cut the hole, the cylinder pulls the cutting component mounting plate to minimize the distance between the milling cutter and the drill bit 21. After the drill bit and the milling cutter have completed drilling the hole on the composite pipe, the revolving motor 320 starts to drive the revolving plate component 31 to start rotating. The cylinder pushes the cutting component mounting plate outward to move horizontally, so that the diameter of the milling cutter cutting circle continues to expand until the milling cutter hits the metal hole wall of the branch pipe opening. The milling cutter will move along the hole wall of the branch pipe opening to cut the composite pipe.

[0050] This embodiment Figure 1 A guide rail slider combination in the plumb direction is installed on the vertical plate on the right side of the middle bottom plate 1 as a feed guide component, and the feed platform 30 is installed on the slider in the plumb direction to guide the feed platform 30. In this case, when the feed platform 30 feeds, it is no longer moving closer or farther away from the vertical plate on which the plumb direction guide rail slider is installed, but moving in a vertical direction. Therefore, the feed guide component only needs to guide the feed platform 30 to move in a linear direction along the feed direction (along the axis direction of the milling cutter and drill bit).

[0051] The driving devices in all the embodiments can be replaced by common components and mechanisms with the same functions, such as that rotation can be replaced by pneumatic motor driving, movement can be replaced by linear motor, rotating motor plus screw rod, motor plus cam ejector pin, electromagnet, etc. driving, and guiding can adopt optical axis, sliding block or linear guide rail, etc. guiding, etc. These all belong to common knowledge in the field and will not be described in detail. The present application is not limited to the above-mentioned embodiments, and those skilled in the art can infer other variant forms from the present application, and these variant forms also belong to the subject of the present application.

Claims

1. A cutting apparatus for cutting a composite pipe material covering a branch hole of a steel pipe, characterized by It comprises a feeding assembly, a center hole assembly, a revolution assembly and a circumferential cutting assembly, The feeding assembly comprises a base plate, a feeding platform, a feeding guide component and a feeding driving component, the feeding platform is installed on the base plate through the feeding guide component, the feeding driving component is directly or indirectly connected with or contacted with the base plate and the feeding platform, the feeding driving component drives the relative movement of the feeding platform relative to the base plate, and the feeding guide component ensures that the feeding movement of the feeding platform is translational movement. The center hole assembly comprises a center hole component which is directly or indirectly installed on the feeding platform, the center hole component is a conical component which can pierce the composite pipe through translational movement or a drill bit component which can drill through the composite pipe through the combination of rotational movement and translational movement, the length direction of the center hole component is parallel to the feeding direction of the feeding platform. The revolution assembly comprises a revolution plate component, a revolution guide component and a revolution driving component, the revolution plate component is installed on the feeding platform through the revolution guide component, the revolution driving component drives the revolution plate component to rotate around the axis which is parallel to the feeding direction of the feeding platform, and drives the revolution plate component to rotate around the rotation center of the center hole component. The circumferential cutting assembly comprises a circumferential cutting component mounting plate, a circumferential cutting component and a circumferential cutting driving component, the circumferential cutting component mounting plate is swing or translational installed on the revolution plate component, the plane where the circumferential cutting component mounting plate moves is perpendicular to the feeding direction of the feeding platform, the circumferential cutting component is installed on the circumferential cutting component mounting plate, the circumferential cutting component is a component which can realize radial cutting through rotation, the circumferential cutting component revolves around the center hole component to cut the composite pipe in a circumferential manner, swings outward relative to the revolution plate component with the rotation center of the circumferential cutting component mounting plate, the length direction of the circumferential cutting component is parallel to the feeding direction of the feeding platform, and the circumferential cutting driving component is a component which drives the circumferential cutting component to rotate.

2. The cutting device for cutting the composite pipe covering the branch hole of the steel pipe according to claim 1, wherein: When the center hole component drills through the composite pipe through the combination of rotational movement and translational movement, the center hole assembly further comprises a center hole driving component which is installed on the feeding platform and drives the center hole component to rotate around its axis.

3. The cutting device for cutting the composite pipe covering the branch hole of the steel pipe according to claim 1, wherein: The center hole component has a blocking structure which is an end structure thicker than the main body of the center hole component.

4. The cutting device for cutting the composite pipe covering the branch hole of the steel pipe according to claim 1, wherein: One end of the swing circumferential cutting component mounting plate is hinged on the revolution plate component, and the translational movement of the translational circumferential cutting component mounting plate is reciprocating movement in the outward radial direction of the rotation axis of the revolution plate component.

5. The cutting device for cutting the composite pipe covering the branch hole of the steel pipe according to claim 1, wherein: The circumferential cutting component is a milling cutter-shaped component.

6. The cutting device for cutting the composite pipe covering the branch hole of the steel pipe according to claim 1, wherein: The circumferential cutting driving part is installed on a feeding platform, a revolution plate part, or a circumferential cutting part mounting plate.

7. The cutting device for cutting a composite pipe covering a branch hole of a steel pipe according to claim 1, wherein: the cutting device comprises a cutting track control part installed on a base plate or a revolution plate part and in contact with or connected to the circumferential cutting part mounting plate.

8. The cutting device for cutting a composite pipe covering a branch hole of a steel pipe according to claim 7, wherein: the cutting track control part uses a cylinder or a contact limiting part to keep the circumferential cutting part and the center hole part at the closest distance before cutting the composite pipe, and the circumferential cutting part mounting plate swings outward during cutting, so that the distance between the circumferential cutting part and the center hole part gradually increases.

9. The cutting device for cutting a composite pipe covering a branch hole of a steel pipe according to claim 7, wherein: the cutting track control part uses a cylinder or an elastic part to apply a force to the circumferential cutting part away from the center hole part during cutting. ​ ​ ​

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