Stainless steel pipe pressing and cutting device suitable for direct-push connecting pipe installation site

Abstract

The invention discloses a stainless steel pipe pressing and cutting device suitable for a direct-push connecting pipe installation site, which is characterized in that the cut end of a stainless steel pipe is directly pushed and inserted into a pipe joint with a sealing ring and an elastic clamping ring to form an anti-drawing sealing pipeline, and the cut end of the stainless steel pipe is a reducing arc opening; an annular groove used for being matched with a pipe joint elastic clamping ring is formed in the adjacent pipe part of the cut end, and the pipe cutting pressing wheel assembly is used for cutting off the stainless steel pipe and forming a reducing arc opening in the cut end. The groove pressing wheel assembly is used for pressing an annular groove in the adjacent pipe part of the notch end of the stainless steel pipe. The pressure applying assembly is used for providing pressure on the stainless steel pipe for the pipe cutting pressing wheel assembly and the groove pressing pressing wheel assembly. The pipe rolling assembly is used for driving the stainless steel pipe to rotate around a shaft. According to the device, the pressing groove pressing wheel assembly and the pipe cutting pressing wheel assembly can work according to a specified sequence, the operation actions of pipe cutting, groove pressing and closing-up can be met at a time, the operation difficulty is low, the accurate depth and position of an annular groove machined in a stainless steel pipe can be accurate, and the amplitude of a reducing arc opening of a pipe opening formed after pipe cutting is standard; onsite construction of multi-caliber stainless steel pipes can be met through one machine, adjustment is convenient, and stability is high.

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] Stainless steel pipe push-to-connect is a commonly used pipe connection method. It is fixed by plug-in pipe fittings and stainless steel pipes. There is no need for welding between the two. The installation is simple and quick, which can reduce construction time and labor costs. Plug-in pipe fittings are usually equipped with sealing rings or sealing pads and C-rings (also known as elastic clamps). The sealing rings can provide good sealing performance to prevent water leakage and leakage, and the C-rings can provide strong tensile strength. Plug-in is suitable for pipe connections of different specifications and has strong 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 (for matching 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 the grooves at the specific positions of the cut of the stainless steel pipe after cutting, 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 on the annular groove of the stainless steel pipe. Because the installation requires that the stainless steel pipe after cutting the pipe can enter it 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 stainless steel pipe cutting, the pressing depth and pressing position of the annular groove are relatively high; due to the low processing position accuracy during the existing on-site pressing and grooving, the plug-in sealing effect is not good, and the operation is complicated and inefficient. Therefore, there is a need in 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 view of the above problems, the present invention aims to provide a stainless steel pipe cutting device suitable for installation sites of direct push connection pipes, which can effectively improve the efficiency and accuracy of on-site construction.

[0005] To achieve the technical purpose, the scheme of the present invention is: a stainless steel pipe cutting device suitable for the installation site of a direct push connection pipe, wherein the 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 clamping ring to form a pull-out resistant sealing 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 clamping ring of the pipe joint, and 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:

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

[0007] 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;

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

[0009] The tube roller assembly is used to drive the stainless steel tube to rotate around its axis.

[0010] Preferably, the grooving wheel assembly and the pipe cutting wheel assembly are telescopically mounted on the frame, the tube rolling assembly is located below the pipe cutting wheel assembly and the grooving wheel assembly, the pressure applying assembly has a driving shaft, on which a tube cutting cam of the extruding tube cutting wheel assembly and a groove pressing cam of the extruding groove pressing wheel assembly are coaxially mounted, the off-axis highest protrusion positions of the tube cutting cam and the groove pressing cam are staggered with each other, and the driving shaft is rotated so that the groove pressing cam and the pipe cutting cam apply maximum pressure to the grooving wheel assembly and the pipe cutting wheel assembly respectively in sequence.

[0011] Preferably, the tube cutting pressure wheel assembly comprises a tube cutting wheel, a first guide rod, and a first elastic reset member. The first guide rod is movably mounted on the frame, and the tube cutting wheel is rotatably mounted below the first guide rod. The driving shaft of the pressure-applying assembly is rotated so that the tube cutting cam contacts the first guide rod and overcomes the tension of the first elastic reset member to make the tube cutting wheel tend to move downward toward the tube rolling assembly. When the tube cutting cam leaves the first guide rod, the tube cutting wheel is reset upward under the action of the first elastic reset member.

[0012] The groove pressing wheel assembly includes a groove pressing wheel, a second guide rod, and a second elastic reset member. The second guide rod is movably installed on the frame up and down, and the groove pressing wheel is rotatably installed below the second guide rod. The driving shaft of the pressure-applying assembly is rotated so that the groove pressing cam contacts the second guide rod and overcomes the tension of the second elastic reset member to make the groove pressing wheel tend to move downward toward the rolling tube assembly. When the groove pressing cam leaves the second guide rod, the groove pressing wheel resets upward under the action of the second elastic reset member.

[0013] Preferably, the tube cutting wheel assembly comprises one set, and the groove pressing wheel assembly comprises two sets respectively arranged on both sides of the tube cutting wheel assembly.

[0014] Preferably, the drive shaft is also equipped with a drive handle or a drive motor.

[0015] Preferably, at least two sets of grooving cams and tube 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 adjusting 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 tube cutting cams to match stainless steel pipes of corresponding 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 driving 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 driving motor is drivingly 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 tube 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 operating difficulty, and can machine precise annular grooves in depth and position on stainless steel pipes, and the pipe opening reduction arc amplitude of the cut pipe is standard; at the same time, the present application can meet the on-site construction of stainless steel pipes of multiple calibers with one machine, and is easy to adjust and has 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 schematic diagram of the side view structure of the present invention;

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

[0027] Figure 7 It is an assembly cross-sectional view 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 Figure 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 site. 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 with a sealing ring 8 and an elastic clamping ring 9 (C-shaped ring structure) to form an anti-pullout sealing pipeline. The cut end 601 of the stainless steel pipe 6 is a reduced diameter arc, and the adjacent pipe part of the cut end is formed with an annular groove 602 for matching the elastic clamping ring of the pipe joint. The stainless steel pipe cutting device includes a frame 1, a pipe cutting pressing wheel assembly 2, a groove pressing wheel assembly 3, a pressure assembly 4 and a pipe rolling assembly 5, wherein: the pipe cutting pressing wheel assembly 2 is used to cut the stainless steel pipe 6 and form a reduced diameter arc at the cut end 601;

[0030] The groove pressing wheel assembly 3 is used to press an annular groove 602 on the adjacent pipe part of the cut end of the stainless steel pipe 6; the pressure assembly 4 is used to provide pressure on the stainless steel pipe 6 for the pipe cutting wheel assembly 2 and the groove pressing wheel assembly 3; the tube rolling assembly 5 is used to drive the stainless steel pipe 6 to rotate around the axis. More than one groove pressing wheel assembly 3 and the pipe cutting wheel assembly 2 are telescopically installed on the frame 1, and the tube rolling assembly 5 is located below the pipe cutting wheel assembly 2 and the groove pressing wheel assembly 3. The pressure assembly 4 can respectively contact with the pipe cutting wheel assembly 2 and the groove pressing wheel assembly 3 in a specified order and press them down to contact the stainless steel pipe 6 on the tube rolling assembly 5. The pressure-applying assembly 4 has a driving shaft 403, on which a tube cutting cam 402 of the tube extrusion cutting wheel assembly 2 and a 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. The driving shaft 403 is rotated so that the groove pressing cam 401 and the tube cutting cam 402 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 pressing wheel assembly and the groove pressing wheel assembly to perform processing actions in a specified order, the pipe cutting pressing 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 makes the pipe cutting cam 402 contact the first guide rod 202 and overcomes the tension of the first elastic reset member 203 so that the pipe cutting wheel 201 tends 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 rotating pressure applying assembly 4 makes the groove pressing cam 401 contact the second guide rod 302 and overcomes the tension of the second elastic reset member 303 so that the groove pressing wheel 301 tends to move downward toward the rolling tube 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] In order to facilitate the automatic switching operation, the groove pressing cam 401 and the tube cutting cam 402 are one of eccentric wheels or rotating cams. The user only needs to rotate the pressure component in the specified direction to adjust the height difference by rotation, that is, to achieve automatic switching of the groove pressing and tube cutting actions. In order to allow the stainless steel pipe to rotate stably, the tube rolling assembly 5 includes a driving motor, a first roller tube 501 and a second roller tube 502. The first roller tube 501 and the second roller tube 502 are arranged in parallel, and the driving motor is connected to the first roller tube 501 and the second roller tube 502; the rolling axis of the first roller tube 501 is parallel to the rotation axis of the groove pressing wheel 301 and the tube cutting wheel 201. In order to meet the requirements of smooth closing, the cutting knife angle on the tube cutting wheel 201 is 110°-140°. The tube cutting knife with a magnetic cutting knife angle is used to process the reduced diameter arc (located at the incision end) to close the smooth end, which can better compress the sealing ring and the pipe joint to form a stable sealed splicing structure.

[0035] When in use, after rotating the driving shaft 403, the groove pressing cam 401 on the driving shaft 403 first contacts the second guide wheel 304 and drives the groove pressing wheel 301 to press down and contact the stainless steel pipe 6 to perform the groove pressing operation. At this time, the tube cutting wheel 201 contacts the stainless steel pipe 6 and completes partial cutting (not cutting); continue to apply force to the driving shaft 403, and after the annular groove 602 that meets the pull-out resistance dimension depth is formed, the groove pressing cam 401 rotates to make way (the second guide rod is partially or completely reset upward) so that the groove pressing wheel 301 rises and separates from the stainless steel pipe 6. At the same time, the tube cutting cam 402 abuts against the first guide wheel 204 and drives the tube cutting wheel 201 to press further downward until the stainless steel pipe 6 is completely cut, that is, the tube cutting and closing operation is completed, and finally a stainless steel pipe 6 with an annular groove 602 and a cut end 601 as a reduced diameter arc that can be connected to the pipe joint 7 is obtained. The distance between the annular groove 602 and the end surface of the cut end 601 is precise, the depth of the annular groove 602 is also very precise, and there is no thread around it; at the same time, the cut end 601 is a flat cone as a whole.

[0036] The traditional pipe cutting process and grooving process are carried out separately, which is inefficient. At the same time, it is difficult for workers to process an annular groove with a precise distance from the cut end. If the distance is too short, the sealing effect will be affected, and if the distance is too long, it cannot be assembled. At the same time, if the groove pressing wheel 301 of the groove pressing wheel assembly 3 still keeps contact with the stainless steel pipe 6 and does not separate after processing the annular groove 602, the inclined surface of the pipe cutting wheel 201 will apply thrust to the outside of the stainless steel pipe 6 when cutting. Since the groove pressing wheel 301 on the stainless steel pipe 6 has not withdrawn at this time, the groove pressing wheel 301 will press out threads 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 groove pressing wheel and the pipe cutting wheel, and the operation is very smooth. When the stainless steel pipe is directly pushed into the pipe joint 7 with a sealing ring 8 and an elastic retaining ring 9, the stainless steel pipe with threads near the annular groove 602 will cause the elastic retaining ring to fail to fall into the groove during installation. In the existing construction method, additional threads are set at the outlet end of the stainless steel pipe to increase the pull-out resistance, and then locked by a nut. However, it is difficult to process the threads on the surface of the stainless steel pipe on site, and the processing speed is slow. The processing depth of the annular groove in the present application is precise, and it can produce a pull-out resistance that meets the construction requirements in combination with the elastic retaining ring.

[0037] like Figure 1-6, a stainless steel pipe cutting device suitable for the installation site of direct push connection pipes, which can meet the rapid matching and adjustment of stainless steel pipes of multiple diameters. Three installation slots 101 are arranged on the frame 1, and two groove pressing wheel assemblies 3 and a pipe cutting wheel assembly 2 are telescopically installed in the installation slots 101. The two groove pressing wheel assemblies 3 are respectively located on both sides of the pipe cutting wheel assembly 2. The size specifications of the groove pressing wheels 301 on both sides are the same, and the interval distance between the groove pressing wheels 301 on both sides and the pipe cutting wheel 201 is the same. Two stainless steel pipes with annular grooves and reduced diameter arcs can be produced in one processing, which can effectively improve the processing efficiency.

[0038] like Figure 2 ,4. In order to meet the on-site processing requirements of stainless steel pipes with different diameters of 25mm, 20mm, or 15mm, four groove pressing cams 401 and two pipe cutting cams 402 are arranged on the pressure assembly 4, and an adjustment locking mechanism 404 is arranged on one side of the frame 1. After unlocking the adjustment locking mechanism 404, the driving shaft 403 can drive the groove pressing cam 401 and the pipe cutting cam 402 to move horizontally to match stainless steel pipes with different diameters 6. Of course, it is also possible not to increase the number of cams, and to arrange a wheel sleeve outside the groove pressing cam 401 and the pipe cutting cam 402. For example, the original groove pressing cam and the pipe cutting cam match 25mm stainless steel pipes; the diameter of the groove pressing cam and the pipe cutting cam is increased by the wheel sleeve, so as to meet the pressure cutting operation requirements of stainless steel pipes with smaller diameters such as 20mm or 15mm.

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

[0040] When the installation location of stainless steel pipes is sometimes on the roof, the plug-in method is far better than the clamping method using hydraulic pliers for clamping and fixing. In the field of plug-in, the processing device of this application has better processing accuracy than the existing pipe cutting device (the closing accuracy and the depth and position of the groove can meet the requirements), so the sealing performance is better during plug-in, and it is not easy to leak; at the same time, the equipment of this application also takes into account the on-site processing needs of stainless steel pipes of different sizes and diameters, and can quickly adjust the matching size.

[0041] A device for cutting stainless steel pipes suitable for installation sites of direct push connection pipes, wherein the guide rod adopts a replaceable structure. In order to meet the requirements of pipes of different sizes, the groove depths of different pipe diameters (for example, matching three pipe diameters of 25mm, 20mm, and 15mm) are basically the same, but the pipe diameters are different; the lengths of the first guide rod 202 and the second guide rod 302 can also be adjusted. The difference in the length and short axis of the eccentric wheel is calculated, and then the horizontal position of the upper edge of the pipes of different diameters can be calculated to calculate the stroke difference of different specifications. According to this difference, a shortened telescopic rod of a suitable length is selected to switch between different pipe diameters. Compared with the horizontal switching adjustment using multiple groove pressing cams and pipe cutting cams (which meet fewer pipe diameter specifications, but have a fast adjustment speed), the adjustment of the telescopic rod can meet more pipe diameter sizes and has better matching adaptability.

[0042] Figure 7 This is a cross-sectional view of the stainless steel pipe and the pipe joint after cutting. The stainless steel pipe 6 needs to be processed with an annular groove 602 to install the elastic clamp ring 9 to form an anti-pullout force. If the distance between the annular groove 602 and the end face of the cut end 601 is greater than the preset value, the annular groove 602 cannot be connected to the elastic clamp ring 9. If the distance is too short, the sealing performance may be reduced. If there are threads near the annular groove 602, the elastic clamp ring will not fall into place, resulting in poor anti-pullout force.

[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, firstly, the cut end 601 may not be able to open the C-shaped ring, resulting in the stainless steel pipe 6 not being able to be inserted into the pipe joint 7 and being unable to be installed normally, and 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, since the cut end 601 of the stainless steel pipe 6 is a reduced diameter arc, the cut end can effectively squeeze the sealing ring to shrink while also forming a better sealing effect with the inner wall of the pipe joint 7.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any slight modification, equivalent substitution and improvement made to the above embodiment based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A device for cutting stainless steel pipes suitable for direct push connection pipe installation site, wherein the 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 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 part of the cut end is formed with an annular groove for matching the elastic clamp ring of the pipe joint, characterized in that: The stainless steel pipe cutting device comprises a frame, a pipe cutting wheel assembly, a groove pressing wheel assembly, a pressure applying assembly and a pipe rolling assembly, wherein: The pipe cutting and pressing 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-applying assembly is used to provide pressure to the stainless steel pipe for the pipe cutting and pressing wheel assemblies and the groove pressing wheel assemblies; The tube roller assembly is used to drive the stainless steel tube to rotate around its axis.

2. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to claim 1 is characterized in that: The grooving wheel assembly and the pipe cutting wheel assembly are telescopically mounted on the frame, the pipe rolling assembly is located below the pipe cutting wheel assembly and the grooving wheel assembly, the pressure applying assembly has a driving shaft, on which a pipe cutting cam of the pipe extruding and cutting wheel assembly and a groove pressing cam of the pipe extruding and grooving wheel assembly are coaxially mounted, the off-axis highest protrusion positions of the pipe cutting cam and the groove pressing cam are staggered with each other, and the driving shaft is rotated so that the groove pressing cam and the pipe cutting cam apply maximum pressure to the grooving wheel assembly and the pipe cutting wheel assembly respectively in sequence.

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

4. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to claim 3 is characterized in that: The pipe cutting pressing 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 pressing wheel assembly.

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

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 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.

7. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to claim 6, 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.

8. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to any one of claims 3 to 7, characterized in that: The roller tube assembly includes a driving motor, a first roller tube and a second roller tube. The first roller tube and the second roller tube are arranged in parallel. The driving motor is drivingly 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.

9. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to any one of claims 3 to 7, characterized in that: The cutting angle of the tube cutting wheel is 110°-140°.

10. The stainless steel pipe cutting device suitable for installation of direct push connection pipes according to any one of claims 3 to 7, characterized in that: A first guide wheel that can rotate and transmit pressure is also installed on the top of the first guide rod, and the tube 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.

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