A cutting device for stainless steel pipe suitable for installation site of push-to-connect pipe

Abstract

The application discloses a kind of cutting stainless steel pipe device suitable for direct push connection pipe installation site, and direct push connection pipe installation is to insert the cut end of stainless steel pipe directly into pipe joint with sealing ring and elastic snap ring to form sealed pipeline against pull, and the cut end of stainless steel pipe is reduced arc opening, and the adjacent pipe part of cut end is formed with annular groove for matching elastic snap ring of pipe joint, and pipe cutting pressure wheel assembly is used to cut stainless steel pipe and form reduced arc opening at cut end; Pressure groove pressure wheel assembly is used to press annular groove on the adjacent pipe part of cut end of stainless steel pipe; Pressure assembly is used to provide pressure on stainless steel pipe for pipe cutting pressure wheel assembly and pressure groove pressure wheel assembly; Pipe rolling assembly is used to drive stainless steel pipe to rotate around shaft. The device of the present application can make pressure groove pressure wheel assembly and pipe cutting pressure wheel assembly work in specified order, can meet the operation action of pipe cutting, pressure groove and closing in one time, has low operation difficulty, can process accurate annular groove depth and position on stainless steel pipe, and the amplitude of pipe opening cut by pipe cutting is standard; The present application can meet the on-site construction of stainless steel pipe with multiple diameters with one machine, and is easy to adjust and has high stability.

Description

Technical Field

[0001] The invention relates to the field of pipeline connection processing equipment, and in particular to a stainless steel pipe cutting device suitable for installation sites of direct-push connection pipes. Background Art

[0002] Push-on stainless steel pipe connections are a common method of connecting pipes. These connections are secured by plug-in fittings that connect to the stainless steel pipe. No welding is required, making installation quick and easy, reducing construction time and labor costs. These fittings typically incorporate a sealing ring or gasket, as well as a C-ring (also known as a snap ring). The sealing ring provides a strong seal to prevent leaks, while the C-ring offers strong pull-out resistance. This method is suitable for connecting pipes of varying specifications and offers high versatility.

[0003] Existing stainless steel plug-in pipe fittings can be prefabricated in the factory (for example, using the water swelling method); however, the stainless steel pipe needs to be cut and annular grooves pressed (to match the C-ring) at the installation site. During on-site construction, the installation process of the stainless steel pipe push-in is as follows: first, cut the stainless steel pipe according to the required size, then process a pressing groove at a specific position on the cut end of the cut stainless steel pipe, and finally push the processed stainless steel pipe into the plug-in pipe fitting, so that the stainless steel pipe enters the sealing ring and the C-ring, and the C-ring is stuck in the annular groove of the stainless steel pipe. Because the installation requires that the stainless steel pipe after cutting and cutting can enter without damaging the sealing ring and the annular groove needs to be accurately fitted into the C-ring, the requirements for the closing curvature of the cut stainless steel pipe, the pressing depth of the annular groove, and the pressing position are relatively high. Due to the low processing position accuracy of the existing on-site pressing and grooving, the plug-in sealing effect is poor, and the operation is complicated and inefficient. Therefore, there is a need on the market for a cutting and pressing device that can simultaneously perform high-precision pipe cutting, grooving, and closing on site and is easy to carry to the pipe installation site. Summary of the Invention

[0004] In response to the above problems, the present invention aims to provide a stainless steel pipe cutting device suitable for direct push connecting pipe installation site, which effectively improves the on-site construction efficiency and accuracy.

[0005] To achieve this technical objective, the present invention provides a device for cutting stainless steel pipes suitable for installation at a direct-push connection pipe installation site. The direct-push connection pipe installation involves directly inserting the cut end of the stainless steel pipe into a pipe joint having a sealing ring and an elastic retaining ring to form a pull-out resistant sealed pipeline. The cut end of the stainless steel pipe is a reduced-diameter arc, and the adjacent pipe portion of the cut end is formed with an annular groove for matching the elastic retaining ring of the pipe joint. The device comprises a frame, a pipe cutting roller assembly, a groove pressing roller assembly, a pressure assembly, and a pipe rolling assembly, wherein:

[0006] The pipe cutting pressure wheel assembly is used to cut the stainless steel pipe and form a reduced diameter arc cut on the cut end;

[0007] The pressure groove wheel assembly is used to press a ring groove on the adjacent pipe part of the cut end of the stainless steel pipe;

[0008] The pressure assembly is used to provide pressure to the pipe cutting pressure wheel assembly and the pressure groove wheel assembly for the stainless steel pipe;

[0009] The pipe rolling assembly is used to drive the stainless steel pipe to rotate around the axis.

[0010] As a preferred, the pressure groove wheel assembly and the pipe cutting pressure wheel assembly are installed on the frame in an extendable manner, the pipe rolling assembly is located below the pipe cutting pressure wheel assembly and the pressure groove wheel assembly, the pressure assembly has a driving shaft, the driving shaft is coaxially installed with a pipe cutting cam for extruding the pipe cutting pressure wheel assembly and a pressure groove cam for extruding the pressure groove wheel assembly, the highest off-axis protruding positions of the pipe cutting cam and the pressure groove cam are staggered, and rotating the driving shaft makes the pressure groove cam and the pipe cutting cam apply the maximum pressure to the pressure groove wheel assembly and the pipe cutting pressure wheel assembly in sequence.

[0011] As a preferred, the pipe cutting pressure wheel assembly includes a pipe cutting knife wheel, a first guide rod and a first elastic reset member, the first guide rod is installed on the frame in an up-down movable manner, the pipe cutting knife wheel is rotatably installed below the first guide rod, rotating the driving shaft of the pressure assembly makes the pipe cutting cam contact the first guide rod and overcome the tension of the first elastic reset member to make the pipe cutting knife wheel tend to descend to the pipe rolling assembly, and the pipe cutting knife wheel is reset to ascend under the action of the first elastic reset member when the pipe cutting cam leaves the first guide rod;

[0012] The pressure groove wheel assembly includes a pressure groove wheel, a second guide rod and a second elastic reset member, the second guide rod is installed on the frame in an up-down movable manner, the pressure groove wheel is rotatably installed below the second guide rod, rotating the driving shaft of the pressure assembly makes the pressure groove cam contact the second guide rod and overcome the tension of the second elastic reset member to make the pressure groove wheel tend to descend to the pipe rolling assembly, and the pressure groove wheel is reset to ascend under the action of the second elastic reset member when the pressure groove cam leaves the second guide rod.

[0013] As a preferred, the pipe cutting pressure wheel assembly is one set, and the pressure groove wheel assembly is two sets which are respectively arranged on both sides of the pipe cutting pressure wheel assembly.

[0014] As a preferred, the driving shaft is further installed with a driving handle or a driving motor.

[0015] As a preferred, the driving shaft of the pressure assembly is installed with at least two sets of pressure groove cams and pipe cutting cams corresponding to different pipe diameters of the stainless steel pipe; the frame is further provided with an adjusting and locking mechanism for the driving shaft, and the driving shaft is adjusted and locked by the adjusting and locking mechanism to select different pressure groove cams and pipe cutting cams to match the stainless steel pipe with corresponding pipe diameters.

[0016] Preferably, at least two locking grooves are provided on the driving shaft, and the adjusting locking mechanism can cooperate with the locking grooves to position and lock the driving shaft.

[0017] Preferably, the roller tube assembly includes a drive motor, a first roller tube and a second roller tube, the first roller tube and the second roller tube are arranged in parallel, and the drive motor is connected to the first roller tube and the second roller tube; the rolling axis of the first roller tube is parallel to the rotation axis of the grooving wheel and the tube cutting wheel.

[0018] Preferably, the cutting angle of the tube cutting wheel is 110°-140°.

[0019] Preferably, a first guide wheel that can rotate and transmit pressure is also installed on the top of the first guide rod, and the pipe cutting cam can abut the first guide wheel to apply pressure to the first guide rod; a second guide wheel that can rotate and transmit pressure is also installed on the top of the second guide rod, and the groove pressing cam can abut the second guide wheel to apply pressure to the second guide rod.

[0020] The beneficial effects of the present invention are as follows: the device for pressing and cutting stainless steel pipes of the present application adopts a combination of a grooving cam and a pipe cutting cam, which can enable the grooving wheel assembly and the pipe cutting wheel assembly to work in a specified order, and can meet the operations of pipe cutting, grooving and closing at one time, with low operation difficulty, and can process precise annular grooves in depth and position on stainless steel pipes, and the reduction arc amplitude of the cut pipe mouth is standard; at the same time, the present application can meet the on-site construction of stainless steel pipes of multiple diameters with one machine, easy adjustment and high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the present invention;

[0022] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0023] Figure 3 A perspective view of the rear surface of the present invention;

[0024] Figure 4 It is a partial stereogram of the present invention;

[0025] Figure 5 It is a side view structural diagram of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the front view of the present invention;

[0027] Figure 7 This is a cross-sectional view of the assembly of the stainless steel pipe and the pipe joint of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1-7 As shown, the specific embodiment of the present invention is a stainless steel pipe cutting device suitable for direct push connection pipe installation. The direct push connection pipe installation is to directly push the cut end 601 of the stainless steel pipe 6 into the pipe joint 7 having a sealing ring 8 and an elastic retaining ring 9 (C-ring structure) to form a pull-out resistant sealed pipeline. The cut end 601 of the stainless steel pipe 6 is a reduced diameter arc, and the adjacent pipe portion of the cut end is formed with an annular groove 602 for matching the elastic retaining ring of the pipe joint. The stainless steel pipe cutting device includes a frame 1, a pipe cutting roller assembly 2, a groove pressing roller assembly 3, a pressure assembly 4, and a pipe rolling assembly 5, wherein: the pipe cutting roller assembly 2 is used to cut the stainless steel pipe 6 and form a reduced diameter arc at the cut end 601;

[0030] The grooving wheel assembly 3 is used to press an annular groove 602 into the adjacent tube portion at the cut end of the stainless steel tube 6. The pressure assembly 4 is used to apply pressure to the stainless steel tube 6 by the tube cutting wheel assembly 2 and the grooving wheel assembly 3. The tube rolling assembly 5 is used to drive the stainless steel tube 6 to rotate about its axis. One or more grooving wheel assemblies 3 and the tube cutting wheel assembly 2 are telescopically mounted on the frame 1. The tube rolling assembly 5 is located below the tube cutting wheel assemblies 2 and grooving wheel assemblies 3. The pressure assembly 4 can abut against the tube cutting wheel assemblies 2 and grooving wheel assemblies 3 in a specified order, forcing them to press down on the stainless steel tube 6 on the tube rolling assembly 5. The pressure-applying assembly 4 has a drive shaft 403, on which the tube cutting cam 402 of the tube-extruding and cutting wheel assembly 2 and the groove pressing cam 401 of the groove pressing wheel assembly 3 are coaxially mounted. The off-axis highest protrusion positions of the tube cutting cam 402 and the groove pressing cam 401 are staggered with each other. Rotating the drive shaft 403 causes the groove pressing cam 401 and the tube cutting cam 402 to apply maximum pressure to the groove pressing wheel assembly 3 and the tube cutting wheel assembly 2 respectively in sequence.

[0031] In order to meet the requirements of the pipe cutting pressure wheel assembly and the groove pressing pressure wheel assembly to perform processing actions in a specified order, the pipe cutting pressure wheel assembly 2 includes a pipe cutting wheel 201 and a first guide rod 202. A first elastic reset member 203 is installed between the first guide rod 202 and the frame 1. The first guide rod 202 is installed on the frame 1 so as to be movable up and down. The pipe cutting wheel 201 is rotatably installed below the first guide rod 202. The driving shaft 403 of the rotating pressure assembly 4 causes the pipe cutting cam 402 to contact the first guide rod 202 and overcome the tension of the first elastic reset member 203 to cause the pipe cutting wheel 201 to move downward toward the pipe rolling assembly 5. When the pipe cutting cam 402 leaves the first guide rod 202, the pipe cutting wheel 201 is reset upward under the action of the first elastic reset member 203.

[0032] The groove pressing wheel assembly 3 includes a groove pressing wheel 301 and a second guide rod 302. A second elastic reset member 303 is installed between the second guide rod 302 and the frame 1. The second guide rod 302 is installed on the frame 1 so as to be movable up and down. The groove pressing wheel 301 is rotatably installed below the second guide rod 302. The driving shaft 403 of the pressure applying assembly 4 is rotated so that the groove pressing cam 401 contacts the second guide rod 302 and overcomes the tension of the second elastic reset member 303 to cause the groove pressing wheel 301 to move downward toward the tube rolling assembly 5. When the groove pressing cam 401 leaves the second guide rod 302, the groove pressing wheel 301 is reset upward under the action of the second elastic reset member 303.

[0033] After the groove pressing cam 401 contacts the second guide rod 302 to make the groove pressing wheel 301 move downward and reset, the pipe cutting cam 402 further presses the first guide rod 202 to make the pipe cutting wheel 201 move downward and reset.

[0034] To facilitate automatic switching, the grooving cam 401 and the tube cutting cam 402 are either eccentric wheels or rotating cams. The user simply rotates the pressure assembly in a specified direction to adjust the height difference, automatically switching between grooving and tube cutting. To ensure stable rotation of the stainless steel tube, the tube rolling assembly 5 includes a drive motor, a first roller 501, and a second roller 502. The first and second rollers 501, 502 are arranged in parallel, and the drive motor is connected to the first and second rollers 501, 502. The rolling axis of the first roller 501 is parallel to the rotational axes of the grooving wheel 301 and the tube cutting wheel 201. To ensure a smooth finish, the cutting blade angle on the tube cutting wheel 201 is 110°-140°. Using a tube cutting blade with a magnetic cutting angle, the reduced arc (at the cut end) is machined to achieve a smooth finish, effectively compressing the sealing ring and the pipe joint to form a stable, sealed joint.

[0035] In use, after rotating the drive shaft 403, the pressure groove cam 401 on the drive shaft 403 first contacts and drives the second guide wheel 304 to drive the pressure groove wheel 301 to press and contact the stainless steel pipe 6 to perform the pressure groove operation, at this time the pipe cutting knife wheel 201 contacts and completes partial cutting (not cut off) of the stainless steel pipe 6; continue to apply force to the drive shaft 403, and after the annular groove 602 with the anti-pulling size depth is formed, the pressure groove cam 401 rotates to displace (the second guide rod is partially or completely reset upward) so that the pressure groove wheel 301 rises and separates from the stainless steel pipe 6, at the same time the pipe cutting cam 402 abuts against the first guide wheel 204 and drives the pipe cutting knife wheel 201 to further press downward until the stainless steel pipe 6 is completely cut off, that is, the pipe cutting and closing operation is completed, and finally the stainless steel pipe 6 with the annular groove 602 and the cut end 601 being a reduced diameter arc port capable of being connected with the pipe joint 7 is obtained. The distance between the annular groove 602 and the end face of the cut end 601 is accurate, the depth of the annular groove 602 is also very accurate, and there is no thread around; at the same time, the cut end 601 as a whole presents a flat conical surface.

[0036] The traditional pipe cutting process and the pressure groove process are separately performed, and the efficiency is low; at the same time, it is difficult for workers to process the annular groove with accurate distance position from the cut end, the distance is short, which affects the sealing effect, and the distance is long, which cannot be assembled. At the same time, if the pressure groove wheel 301 of the pressure groove wheel assembly 3 remains in contact with the stainless steel pipe 6 after the annular groove 602 is processed, the bevel of the pipe cutting knife wheel 201 will apply a pushing force to the outside of the stainless steel pipe 6 when cutting, and since the pressure groove wheel 301 on the stainless steel pipe 6 does not exit at this time, the pressure groove wheel 301 will press a thread near the annular groove 602; therefore, the pressure assembly of the present application not only provides downward pressure, but also provides the function of automatically and accurately switching and adjusting the height position of the pressure groove wheel and the pipe cutting knife wheel, and the operation is very smooth. When the stainless steel pipe is directly pushed and inserted into the pipe joint 7 with the sealing ring 8 and the elastic retaining ring 9, the stainless steel pipe with a thread near the annular groove 602 will cause the elastic retaining ring to not fall into the groove during installation. In the existing construction method, an additional thread is arranged on the outlet end of the stainless steel pipe to improve the anti-pulling force, and then a nut is locked, but it is difficult to process the thread on the surface of the stainless steel pipe on site, and the processing speed is slow; the processing depth of the annular groove of the present application is accurate, and the elastic retaining ring can generate an anti-pulling force meeting the construction requirements.

[0037] As Figures 1-6The utility model provides a kind of stainless steel pipe device of cutting and pressing suitable for direct push connection pipe installation site, it can satisfy the quick matching adjustment of multiple pipe diameter stainless steel pipe.The rack 1 is provided with three mounting slots 101, two pressing groove wheel assemblies 3 and a pipe cutting pressing wheel assembly 2 are telescopically mounted in the mounting slot 101, two pressing groove wheel assemblies 3 are located at the two sides of pipe cutting pressing wheel assembly 2 respectively, the size specifications of two sides pressing groove wheel 301 are same, and the interval distance of two sides pressing groove wheel 301 and pipe cutting cutter wheel 201 is same.Two stainless steel pipes with annular groove and reduced diameter arc port can be processed at one time, and the processing efficiency can be effectively improved.

[0038] As Figure 2 ,4, to meet the on-site processing needs of stainless steel pipes with different pipe diameters of 25mm, 20mm or 15mm, the pressing assembly 4 is provided with four pressing groove cams 401 and two pipe cutting cams 402, and the rack 1 is provided with an adjusting and locking mechanism 404 on one side.After unlocking the adjusting and locking mechanism 404, the driving shaft 403 can drive the pressing groove cam 401 and the pipe cutting cam 402 to move horizontally to match stainless steel pipes 6 with different pipe diameters.Of course, the number of cams can not be increased, and a wheel sleeve can be provided outside the pressing groove cam 401 and the pipe cutting cam 402, for example, the original pressing groove cam and pipe cutting cam match the 25mm stainless steel pipe.By increasing the diameter of the pressing groove cam and the pipe cutting cam through the wheel sleeve, the pressing and cutting operation requirements of smaller diameter stainless steel pipes such as 20mm or 15mm can be met.

[0039] The driving handle 405 or driving motor is installed on one side of the driving shaft 403, and at least two locking grooves 406 are provided on the driving shaft 403.The adjusting and locking mechanism 404 can cooperate with the locking grooves 406 to fix the driving shaft 403 in the horizontal direction.When switching to the specified pressing groove cam and pipe cutting cam, the driving shaft can be fixed by adjusting the locking mechanism to avoid horizontal movement when rotating.

[0040] When the stainless steel pipe installation position is sometimes located on the roof, the plug-in method is much better than the clamping and pressing method using hydraulic clamps.In the field of plug-in, the processing device of the utility model has better processing accuracy (the closing accuracy and the depth position of the pressing groove can meet the requirements), so that the sealing performance is better when plug-in, and water leakage is less likely to occur;At the same time, the equipment of the utility model also meets the on-site processing needs of stainless steel pipes with different pipe diameters, and can quickly adjust and match the size.

[0041] A stainless steel pipe cutting device suitable for direct-push connection pipe installation sites features a replaceable guide rod structure. To accommodate varying pipe diameters (for example, 25mm, 20mm, and 15mm), the groove depths for different pipe diameters are essentially the same, differing only in diameter. The lengths of the first and second guide rods 202 and 302 can also be adjusted. By calculating the difference between the major and minor axes of the eccentric and factoring in the horizontal position of the top edge of the pipes of different diameters, the travel difference between the different sizes can be calculated. This difference is then used to select a shortened telescopic rod of the appropriate length to switch between different pipe diameters. Compared to horizontal switching adjustments using multiple groove pressing and cutting cams (which accommodate fewer pipe diameters but are faster), this telescopic rod adjustment accommodates a wider range of pipe diameters and offers greater adaptability.

[0042] Figure 7 This is a cross-sectional view of the stainless steel pipe and fitting after cutting. The stainless steel pipe 6 needs to be machined with an annular groove 602 to allow for the installation of the pull-out-resistant elastic snap ring 9. If the distance between the annular groove 602 and the end surface of the cut end 601 is greater than the preset value, the annular groove 602 will not connect with the elastic snap ring 9. Too short a distance can lead to reduced sealing performance. If threads appear near the annular groove 602, the elastic snap ring will not fall into place properly, resulting in poor pull-out resistance.

[0043] At the same time, since the push-insert splicing operation needs to be performed after the sealing ring 8 is put on, if the cut end 601 of the stainless steel pipe 6 is a straight structure with the same diameter as the outer wall of the pipe, if it is a straight structure, the cut end 601 may not be able to support the C-shaped ring, resulting in the stainless steel pipe 6 not being able to be inserted into the pipe joint 7 and cannot be properly installed. Even if the cut end 601 passes the C-shaped ring, it is easy to scratch the sealing ring. Therefore, the cut end 601 needs to be a reduced diameter arc. At the same time, because the cut end 601 of the stainless steel pipe 6 is a reduced diameter arc, the cut end can effectively squeeze the sealing ring and shrink it while also forming a better sealing effect with the inner wall of the pipe joint 7.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent replacements, and improvements made to the above embodiments based on the technical essence of the present invention shall be included in the scope of protection of the technical solution of the present invention.

Claims

1. A device for cutting stainless steel pipes suitable for direct push connection pipe installation. Direct push connection pipe installation is to directly push the cut end of the stainless steel pipe into a pipe joint with a sealing ring and an elastic clamp to form a pull-out resistant sealed pipeline. The cut end of the stainless steel pipe is a reduced diameter arc, and the adjacent pipe part of the cut end is formed with an annular groove for matching the elastic clamp of the pipe joint. It is characterized by: The stainless steel pipe cutting device includes a frame, a pipe cutting wheel assembly, a groove pressing wheel assembly, a pressure assembly, and a pipe rolling assembly, wherein: The pipe cutting wheel assembly is used to cut stainless steel pipes and form a reduced diameter arc at the cut end; The groove pressing wheel assembly is used to press an annular groove on the adjacent pipe part of the cut end of the stainless steel pipe; The pressure assembly is used to provide pressure to the stainless steel pipe for the pipe cutting and grooving wheel assemblies; The tube rolling assembly is used to drive the stainless steel tube to rotate around its axis; the grooving wheel assembly and the tube cutting wheel assembly are telescopically mounted on the frame, the tube rolling assembly is located below the tube cutting wheel assembly and the grooving wheel assembly, the pressure applying assembly has a driving shaft, on which the tube cutting cam of the tube extruding and cutting wheel assembly and the grooving cam of the grooving wheel extruding assembly are coaxially mounted, the off-axis highest protrusion positions of the tube cutting cam and the grooving cam are staggered with each other, and the driving shaft is rotated so that the grooving cam and the tube cutting cam apply maximum pressure to the grooving wheel assembly and the tube cutting wheel assembly respectively in sequence.

2. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to claim 1 is characterized in that: The pipe cutting pressure wheel assembly includes a pipe cutting wheel, a first guide rod, and a first elastic reset member. The first guide rod is movably mounted on the frame, and the pipe cutting wheel is rotatably mounted below the first guide rod. The driving shaft of the pressure assembly is rotated so that the pipe cutting cam contacts the first guide rod and overcomes the tension of the first elastic reset member to cause the pipe cutting wheel to move downward toward the pipe rolling assembly. When the pipe cutting cam leaves the first guide rod, the pipe cutting wheel is reset upward under the action of the first elastic reset member. The grooving wheel assembly includes a grooving wheel, a second guide rod, and a second elastic reset member. The second guide rod is movably installed on the frame, and the grooving wheel is rotatably installed under the second guide rod. The driving shaft of the pressure assembly is rotated so that the grooving cam contacts the second guide rod and overcomes the tension of the second elastic reset member to make the grooving wheel tend to move downward toward the rolling tube assembly. When the grooving cam leaves the second guide rod, the grooving wheel resets upward under the action of the second elastic reset member.

3. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to claim 2, characterized in that: The pipe cutting wheel assembly comprises one set, and the groove pressing wheel assembly comprises two sets, which are respectively arranged on both sides of the pipe cutting wheel assembly.

4. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to claim 3 is characterized in that: The driving shaft is also equipped with a driving handle or a driving motor.

5. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to claim 4 is characterized in that: At least two sets of grooving cams and pipe cutting cams corresponding to stainless steel pipes of different diameters are installed on the driving shaft of the pressure-applying assembly; the frame is also provided with an adjustment and locking mechanism for the driving shaft, and the driving shaft is adjusted and locked by adjusting the locking mechanism to select different grooving cams and pipe cutting cams to match stainless steel pipes of corresponding diameters.

6. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to claim 5, characterized in that: At least two locking grooves are also provided on the driving shaft, and the adjusting locking mechanism can cooperate with the locking grooves to position and lock the driving shaft.

7. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to any one of claims 2 to 6, characterized in that: The roller tube assembly includes a drive motor, a first roller tube and a second roller tube. The first roller tube and the second roller tube are arranged in parallel. The drive motor is connected to the first roller tube and the second roller tube. The rolling axis of the first roller tube is parallel to the rotation axis of the grooving wheel and the tube cutting wheel.

8. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to any one of claims 2 to 6, characterized in that: The cutting angle of the pipe cutting wheel is 110°-140°.

9. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to any one of claims 2 to 6, characterized in that: The top end of the first guide rod is also equipped with a first guide wheel that can rotate and transmit pressure, and the pipe cutting cam can abut the first guide wheel to apply pressure to the first guide rod; the top end of the second guide rod is also equipped with a second guide wheel that can rotate and transmit pressure, and the groove pressing cam can abut the second guide wheel to apply pressure to the second guide rod.

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