Self-clamping rotary-cut type stainless steel capillary tube cutting device and using method thereof

Abstract

The invention provides a self-clamping rotary-cutting type stainless steel capillary tube cutting device and a using method thereof. A supporting unit comprises a base and a fixing ring, and the fixing ring is fixed to the upper portion of the base; the rotating unit comprises a driving device, a pinion and a rotating ring, the driving device and the pinion are fixed above the base, the rotating ring is slidably connected to the inner side of the fixed ring and can rotate around the fixed ring, notches are formed in the circumferences of the rotating ring and the fixed ring, and butt joint plates are detachably connected to the notches of the rotating ring, so that a complete circular ring is formed; the pinion is in meshed connection with the rotating ring; the cutting and clamping unit comprises a clamping cover, the clamping cover is fixed to the inner side of the rotating ring, the clamping cover and the rotating ring are concentrically arranged, the clamping cover is of an annular structure capable of being opened and closed, the inner side of the clamping cover is elastically connected with two pairs of cutting blades, and the two cutting blades are matched to clamp the capillary tube in the center of the rotating ring. Certain contact force is kept between the cutting blade and the capillary tube all the time during tube cutting, operation steps are simplified, and tube cutting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of capillary tube cutting, and in particular to a self-clamping rotary cutting stainless steel capillary tube cutting device and a use method thereof. Background Art

[0002] Stainless steel capillaries refer to stainless steel tubes with very thin diameters, and their specifications are generally thin tubes with a diameter equal to or less than 6mm. Stainless steel capillaries themselves have good softness, corrosion resistance, high temperature resistance, wear resistance, tensile resistance, waterproofness, and excellent electromagnetic shielding performance, so they are widely used in automation instrument signal tubes, automation instrument wire protection tubes; precision optical scale circuits, seawater equipment, heat exchangers, ships, industrial sensors, electronic equipment circuit protection tubes; safety protection of electrical circuits, protection of thermal instrument capillaries, and internal support of hollow high-voltage optical cables. Taking hydraulic fracturing experimental equipment as an example, stainless steel capillaries are often used in pipelines for high-pressure fluids. These pipelines can be freely bent into various angles and curvature radii, and have the same softness and durability in all directions, providing great convenience and flexibility.

[0003] During the application of stainless steel capillaries, they often need to be processed, such as cut off, connected, etc. At present, for cutting stainless steel capillaries, the tool often used is a small tube cutter (such as patent numbers CN202220199993.X, CN201820236749.X, TW089212731, etc.), which is mainly composed of a cutting blade, a clamping structure and a support structure. When cutting the tube, the tube is placed on the support structure, and the clamping structure is used to make the cutting blade closely contact the surface of the tube. Then the tube cutter is rotated, and the contact between the cutting blade and the surface of the tube is continuously adjusted until the tube is completely cut off. Compared with stainless steel capillaries cut off by a cutting machine or sheared by pliers, the cross-section of the stainless steel capillary cut off by the tube cutter is very flat, which is convenient for installing parts such as ferrules for connection on the tube. However, this type of tube cutter is very inconvenient to use. It needs to be rotated by hand constantly, and this rotation can only be intermittent due to the relative position of the tube and the tube cutter, so it is very troublesome in actual operation. At the same time, every time the contact force between the cutting blade and the tube surface decreases, it is necessary to manually adjust the cutting blade to keep it in close contact with the tube surface; therefore, when the wall thickness of the tube is slightly larger, its tube cutting efficiency is very low. In addition, the current tube cutters are all single-blade cutting, and the minimum tube cutting diameter is generally 3mm, and it is impossible to cut capillaries smaller than 3mm. Summary of the invention

[0004] In response to the problems existing in the above-mentioned prior art, the present invention aims to provide a self-clamping rotary cutting stainless steel capillary cutting device and a method of using the same, so as to ensure that a certain contact force is always maintained between the cutting blade and the capillary when cutting the tube, without the need for repeated adjustment, thereby simplifying the operating steps and improving the tube cutting efficiency.

[0005] In order to achieve the above-mentioned purpose, the present invention proposes a self-clamping rotary cutting stainless steel capillary tube cutting device, comprising a supporting unit, a rotating unit and a cutting clamping unit, the supporting unit comprising a base and a fixed ring, the fixed ring being fixed above the base; the rotating unit comprising a driving device, a pinion and a rotating ring, the driving device and the pinion being fixed above the base, the rotating ring being slidably connected to the inner side of the fixed ring and being able to rotate around it, notches being provided on the circumferences of the rotating ring and the fixed ring, a docking plate being detachably connected at the notch of the rotating ring to form a complete circular ring, the pinion being meshingly connected to the rotating ring, the driving device being able to drive the pinion to rotate, thereby driving the rotating ring to rotate relative to the fixed ring; the cutting clamping unit comprising a clamping cover, the clamping cover being fixed to the inner side of the rotating ring through a connecting column, and being arranged concentrically with the rotating ring, the clamping cover being an openable and closable annular structure, the inner side of which is elastically connected to two pairs of cutting blades, the two pairs of cutting blades being able to clamp the capillary at the center of the rotating ring in cooperation.

[0006] In the above scheme: the clamping cover includes an upper clamping cover and a lower clamping cover, the upper clamping cover and the lower clamping cover form an annular structure, one end of the two are hinged, and the other end is detachably connected, a knife seat is arranged on the inner wall of the upper clamping cover and the lower clamping cover opposite to each other, a movable groove is radially arranged on the knife seat, a spring is arranged in the movable groove, and a mounting groove for accommodating a cutting blade is also arranged on the knife seat, the cutting blade is equipped with a blade bolt, the blade bolt passes through the movable groove and is connected to the cutting blade, so that the cutting blade is slidably fixed on the knife seat, the spring is connected between the outermost end of the movable groove and the blade bolt, and the spring can squeeze the blade bolt under the action of its own elastic force, so that the two blade bolts are both located at the innermost end of the movable groove, so that the two cutting blades are closest to each other, and the shortest distance between the two cutting blades is about 0.1mm.

[0007] In the above scheme: one end of the upper clamping cover and the corresponding end of the lower clamping cover are each provided with a clamping plate, and the two clamping plates are detachably connected by clamping bolts, so that the upper clamping cover and the corresponding end of the lower clamping cover form a detachable connection; the other end of the upper clamping cover and the other end of the lower clamping cover are both hinged to the inner end of the connecting column through a rotating shaft, so that the clamping cover can be opened and closed, and the outer end of the connecting column is fixed to the inner wall of the rotating ring.

[0008] Notches are provided on the fixed ring and the rotating ring, and the clamping cover is designed to be openable and closable, both of which facilitate the capillary to be fed from the side end into the inner side of the clamping cover, thereby solving the problem that the capillary cannot pass directly between the two blades. For example, when both ends of a capillary are fixed on a device, that is, the capillary is a complete connecting pipeline and one end of the capillary cannot be removed, the capillary can only enter from one side of the device and then be cut off.

[0009] In the above scheme: the upper clamping cover and the lower clamping cover each occupy half, the upper clamping cover is located on the upper side of the lower clamping cover, the two knife seats are distributed in the middle of the upper clamping cover and the lower clamping cover, one above and one below, there are two connecting columns, a crossbeam is connected between the two connecting columns, a screw hole is provided on the crossbeam, an adjustment bolt is provided in the screw hole, the head of the adjustment bolt is outside, and the rod part is sequentially provided with a non-threaded section, a threaded section and an axial connection section from the outside to the inside, the axial connection section of the adjustment bolt is connected with a transversely arranged hinge shaft, two connecting rods are hinged on the hinge shaft, and the other ends of the two connecting rods are respectively connected to the blade bolts, and the clamping cover is provided with a rod groove for the two connecting rods to pass through and perform hinged movement. When the adjustment bolt is assembled in the screw hole through the threaded section, the distance between the two cutting blades can be controlled by twisting the adjustment bolt, and the movement of the two connecting rods is restricted by the adjustment bolt; when the adjustment bolt is assembled in the screw hole through the non-threaded section, the adjustment bolt is movable, and the movement of the two connecting rods is not restricted by the adjustment bolt.

[0010] In the above scheme: the front and rear sides of the lower knife seat are provided with limit blocks, and the limit blocks are provided with a tube groove matching the capillary. The tube groove can limit the capillary between the two cutting blades to limit and facilitate loading.

[0011] In the above scheme: gear teeth are arranged circumferentially on the middle part of the outer side of the rotating ring, and the pinion gear meshes with the gear teeth. A front wing is provided on the outer front end of the rotating ring, and a rear wing is provided on the outer rear end of the rotating ring. Docking grooves are provided on the two sections of the front wing corresponding to the notch position. The docking plate is inserted between the two docking grooves and fixed by locking bolts to form a complete circular ring. A track groove is provided circumferentially on the rear wing, and a number of hanging columns are evenly distributed circumferentially on the inner wall of the fixed ring. The hanging columns extend into the track groove and can slide along the track groove. The docking plate is also provided with gear teeth and track grooves for connecting with the rotating ring. The rear wing of the rotating ring is located on the inner side of the fixed ring and is slidably connected to it. The middle part and the front wing of the rotating ring are staggered with the fixed ring. The structural design is ingenious and does not interfere with the movement of the rotating ring.

[0012] In the above scheme: the hanging columns include straight hanging columns and L-shaped hanging columns, the straight hanging columns and L-shaped hanging columns are evenly distributed in the circumferential direction, a circle of track grooves is provided on the outer side surface of the rear wing corresponding to the straight hanging columns, and another circle of track grooves is provided on the rear side surface of the rear wing corresponding to the L-shaped hanging columns, and a cylinder is vertically provided at one end of the straight hanging columns and the L-shaped hanging columns away from the fixed ring, and bearings are provided at both ends of the cylinder, and the cylinder can rotate around the track groove through the bearing, so that the corresponding hanging column can slide along the track groove, and then the rotating ring can rotate relative to the fixed ring. Due to the structure of the two track grooves on the rotating ring and the straight hanging columns and L-shaped hanging columns on the fixed ring, the rotating ring can rotate along the fixed ring without leaving the fixed ring.

[0013] In the above scheme: the driving device is a rotary handle or a rotary motor, and the rotary handle and the rotary motor can be freely selected to realize manual or electric pipe cutting. The electric pipe cutting is suitable for batch processing.

[0014] The present invention also provides a method for using a self-clamping rotary cutting stainless steel capillary tube cutting device, which is mainly suitable for capillaries that cannot pass directly between two blades, and includes the following steps:

[0015] S1. First remove the docking plate, insert the capillary into the inner side of the rotating ring through the gap between the rotating ring and the fixed ring, and then install the docking plate on the rotating ring so that the rotating ring forms a closed ring;

[0016] S2, open the clamping bolts on the upper clamping cover and the lower clamping cover, screw the adjusting bolts inwards, make the threaded section of the adjusting bolts screwed into the screw holes, and make the two connecting rods drive the two cutting blades to move outwards, so that the distance between the two cutting blades is increased, and at the same time, the upper clamping cover and the lower clamping cover are opened; then put the capillary into the pipe groove of the limit block, screw the adjusting bolts in the opposite direction, make the non-threaded section of the adjusting bolts be in the screw holes, and make the two cutting blades contact with the capillary (the two cutting blades contact with the capillary under the action of their respective springs, and always maintain a certain contact force with the capillary, thereby realizing the self-clamping function), and finally fix the upper clamping cover and the lower clamping cover together with the clamping bolts;

[0017] S3. The driving device drives the pinion to rotate, thereby driving the rotating ring to rotate relative to the fixed ring, and then driving the cutting blade to rotate for cutting. At the same time, under the action of the spring, the two cutting blades always keep in contact with the capillary until the capillary is cut off.

[0018] The present invention also provides a method for using a self-clamping rotary cutting stainless steel capillary tube cutting device, which is suitable for a capillary tube that can directly pass through the middle of two blades, comprising the following steps:

[0019] S1. Screw the adjusting bolt inwards so that the threaded section of the adjusting bolt is screwed into the screw hole, and the two connecting rods drive the two cutting blades to move outwards, so that the distance between the two cutting blades is increased; then insert one end of the capillary directly into the tube groove of the limit block, and screw the adjusting bolt in the opposite direction so that the non-threaded section of the adjusting bolt is located in the screw hole, and the two cutting blades are in contact with the capillary (the two cutting blades are in contact with the capillary under the action of their respective springs, and always maintain a certain contact force with the capillary, thereby realizing the self-clamping function);

[0020] S2. The driving device drives the pinion to rotate, thereby driving the rotating ring to rotate relative to the fixed ring, and then driving the cutting blade to rotate for cutting. At the same time, under the action of the spring, the two cutting blades always keep in contact with the capillary until the capillary is cut off.

[0021] The beneficial effects of the present invention are: 1. When the device performs rotational cutting on the capillary, its rotation operation is continuous, so its cutting efficiency is high and the operation is simple; 2. The two cutting blades always maintain a certain contact force with the capillary under the action of elastic force, avoiding the reduction of the contact force between the cutting blade and the capillary surface, and there is no need to repeatedly adjust the distance between the cutting blade and the capillary, saving time and effort; 3. The device is double-blade cutting, and its tube cutting efficiency is higher than that of single-blade cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the installation of the cutting blade.

[0025] Figure 3 It is a structural diagram of the connecting rod.

[0026] Figure 4 It is a schematic diagram of the structure of a rotating ring.

[0027] Figure 5 yes Figure 4 Schematic diagram from another angle.

[0028] Figure 6 It is a structural schematic diagram of the docking plate.

[0029] Figure 7 yes Figure 1 A magnified schematic diagram of center A.

[0030] Figure 8 It is a schematic diagram of the structure of the adjusting bolt.

[0031] Fig. 9 It is a schematic diagram of the arrangement of the adjusting bolts. DETAILED DESCRIPTION

[0032] like Figure 1 As shown in FIG. 9 , a self-clamping rotary cutting stainless steel capillary tube cutting device is mainly composed of a support unit, a rotating unit and a cutting and clamping unit. The support unit includes a base 1 and a fixing ring 2, and the fixing ring 2 is fixed on the base 1 through a support 3.

[0033] The rotating unit includes a driving device 4, a pinion 5 and a rotating ring 6. The driving device 4 and the pinion 5 are fixed on the top of the base 1 through a column 7. The rotating ring 6 is slidably connected to the inner side of the fixed ring 2 and can rotate around it. There are notches on the circumference of the rotating ring 6 and the fixed ring 2. The notch of the rotating ring 6 is detachably connected to a docking plate 8 to form a complete ring. The pinion 5 is meshed and connected with the rotating ring 6. The driving device 4 can drive the pinion 5 to rotate, thereby driving the rotating ring 6 to rotate relative to the fixed ring 2.

[0034] The cutting and clamping unit includes a clamping cover, which is fixed to the inner side of the rotating ring 6 through a connecting column 9 and is arranged concentrically with the rotating ring 6. The clamping cover is an openable and closable annular structure, and two pairs of cutting blades 10 are elastically connected to the inner side thereof. The two pairs of cutting blades 10 cooperate to clamp the capillary 11 at the center of the rotating ring 6.

[0035] Preferably, the clamping cover comprises an upper clamping cover 12 and a lower clamping cover 13, the upper clamping cover 12 and the lower clamping cover 13 are enclosed in an annular structure, one end of the upper clamping cover 12 and the lower clamping cover 13 are hinged, and the other end is detachably connected. A knife seat 14 is arranged on the inner wall of the upper clamping cover 12 and the lower clamping cover 13, and a moving groove 15 is radially arranged on the knife seat 14, and a spring 16 is arranged in the moving groove 15. The knife seat 14 is also provided with a mounting groove for accommodating the cutting blade 10, and the cutting blade 10 is equipped with a blade bolt 17, and the blade bolt 17 passes through the moving groove 15 and is connected to the cutting blade 10, so that the cutting blade 10 is slidably fixed on the knife seat 14. The spring 16 is connected between the outermost end of the moving groove 15 and the blade bolt 17, and the spring 16 can squeeze the blade bolt 17 under its own elastic force, so that the two blade bolts 17 are both located at the innermost end of the moving groove 15, so that the two cutting blades 10 are closest to each other, and the shortest distance between the two cutting blades 10 is about 0.1mm.

[0036] Preferably, one end of the upper clamping cover 12 and the corresponding end of the lower clamping cover 13 are both provided with a clamping plate 18, and the two clamping plates 18 are detachably connected by a clamping bolt 19, so that the upper clamping cover 12 and the corresponding end of the lower clamping cover 13 are detachably connected. The other end of the upper clamping cover 12 and the other end of the lower clamping cover 13 are both hinged to the inner end of the connecting column 9 through a rotating shaft, so that the clamping cover can be opened and closed, and the outer end of the connecting column 9 is fixed to the inner wall of the rotating ring 6.

[0037] Notches are provided on the fixed ring 2 and the rotating ring 6, and the clamping cover is designed to be openable and closable, both of which facilitate the capillary 11 to be fed into the inner side of the clamping cover from the side end, thereby solving the problem that the capillary 11 cannot pass directly between the two blades. For example, when both ends of a capillary 11 are fixed on a device, that is, the capillary 11 is a complete connecting pipeline and one end of it cannot be removed, the capillary 11 can only enter from one side of the device and then be cut off.

[0038] Preferably, the upper clamping cover 12 and the lower clamping cover 13 each occupy half, the upper clamping cover 12 is located on the upper side of the lower clamping cover 13, and the two blade seats 14 are distributed one above and one below in the middle of the upper clamping cover 12 and the lower clamping cover 13. There are two connecting columns 9, and a crossbeam 20 is connected between the two connecting columns 9. The crossbeam 20 is provided with a screw hole, and an adjustment bolt 21 is provided in the screw hole. The head of the adjustment bolt 21 is outside, and the rod part is sequentially provided with a non-threaded section 210, a threaded section 211 and a shaft connection section 212 from the outside to the inside. The shaft connection section 212 of the adjustment bolt 21 is connected to a transversely arranged hinge shaft, and two connecting rods 22 are hinged on the hinge shaft. The other ends of the two connecting rods 22 are respectively connected to the two blade bolts 17. The clamping cover is provided with a rod groove 32 for the two connecting rods 22 to pass through and perform hinged movement.

[0039] When the adjusting bolt 21 is assembled in the screw hole through the threaded section, the distance between the two cutting blades 10 can be controlled by twisting the adjusting bolt 21, and the movement of the two connecting rods 22 is restricted by the adjusting bolt 21; when the adjusting bolt 21 is assembled in the screw hole through the non-threaded section, the adjusting bolt 21 is movable, and the movement of the two connecting rods 22 is not restricted by the adjusting bolt 21.

[0040] Preferably, the front and rear sides of the lower knife seat 14 are provided with limit blocks, and the limit blocks are provided with a tube groove 23 matching the capillary 11. The tube groove 23 can limit the capillary 11 between the two cutting blades 10, playing the role of limiting and facilitating loading.

[0041] Preferably, gear teeth 24 are arranged circumferentially on the middle part of the outer side of the rotating ring 6, and the pinion 5 meshes with the gear teeth 24. A front wing 25 is provided at the outer front end of the rotating ring 6, and a rear wing 26 is provided at the outer rear end of the rotating ring 6. Both sections of the front wing 25 corresponding to the notch are provided with docking grooves 27, and the docking plate 8 is inserted between the two docking grooves 27 and fixed by locking bolts to form a complete circular ring.

[0042] A track groove 28 is provided circumferentially on the rear wing 26, and a plurality of hanging posts are evenly distributed circumferentially on the inner wall of the fixed ring 2. The hanging posts extend into the track groove 28 and can slide along the track groove 28. The docking plate 8 is also provided with gear teeth 24 and track groove 28 for connecting with the rotating ring 6. The rear wing 26 of the rotating ring 6 is located inside the fixed ring 2 and is slidably connected thereto. The middle part and the front wing 25 of the rotating ring 6 are staggered from the fixed ring 2. The structural design is ingenious and does not interfere with the movement of the rotating ring 6.

[0043] Preferably, the hanging column includes a straight hanging column 29 and an L-shaped hanging column 30, and the straight hanging column 29 and the L-shaped hanging column 30 are evenly distributed in the circumferential direction, and a circle of track grooves 28 are provided on the outer side surface of the rear wing 26 corresponding to the straight hanging column 29, and another circle of track grooves 28 are provided on the rear side surface of the rear wing 26 corresponding to the L-shaped hanging column 30. The straight hanging column 29 and the L-shaped hanging column 30 are vertically provided with a cylinder 31 at one end away from the fixed ring 2, and bearings are provided at both ends of the cylinder 31. The cylinder 31 can rotate around the track groove 28 through the bearing, so that the corresponding hanging column can slide along the track groove 28, and then the rotating ring 6 can rotate relative to the fixed ring 2. Due to the structure of the two track grooves 28 on the rotating ring 6 and the straight hanging column 29 and the L-shaped hanging column 30 on the fixed ring 2, the rotating ring 6 can rotate along the fixed ring 2 without leaving the fixed ring 2.

[0044] Preferably, the driving device 4 is a rotary handle or a rotary motor. The rotary handle and the rotary motor can be freely selected to achieve manual or electric pipe cutting. The electric pipe cutting is suitable for batch processing.

[0045] A method for using a self-clamping rotary cutting stainless steel capillary tube cutting device is mainly applicable to a capillary tube 11 that cannot pass directly between two blades, and comprises the following steps:

[0046] S1. First remove the docking plate 8, insert the capillary 11 into the inner side of the rotating ring 6 through the gap between the rotating ring 6 and the fixed ring 2, and then install the docking plate 8 on the rotating ring 6, so that the rotating ring 6 forms a closed circular ring.

[0047] S2, open the clamping bolts 19 on the upper clamping cover 12 and the lower clamping cover 23, screw the adjusting bolt 21 inwardly, so that the threaded section 211 of the adjusting bolt 21 is screwed into the screw hole, and the two connecting rods 22 drive the two cutting blades 10 to move outwardly, so that the distance between the two cutting blades 10 is increased, and the upper clamping cover 12 and the lower clamping cover 23 are opened at the same time; then put the capillary 11 into the pipe groove 23 of the limit block, screw the adjusting bolt 21 in the opposite direction, so that the non-threaded section 210 of the adjusting bolt 21 falls into the screw hole, and the two cutting blades 10 are in contact with the capillary 11 (the two cutting blades 10 are in contact with the capillary 11 under the action of their respective springs 16, and always maintain a certain contact force with the capillary 11, thereby realizing the self-clamping function), and finally fix the upper clamping cover 12 and the lower clamping cover 23 together with the clamping bolts.

[0048] S3. The driving device drives the pinion 5 to rotate, thereby driving the rotating ring 6 to rotate relative to the fixed ring 2, and then driving the cutting blade 10 to rotate for cutting. At the same time, under the action of the spring 16, the two cutting blades 10 always keep in contact with the capillary 11 until the capillary 11 is cut off.

[0049] Another method for using a self-clamping rotary cutting stainless steel capillary tube cutting device, which is suitable for a capillary tube 11 that can directly pass through the middle of two blades, comprises the following steps:

[0050] S1. Screw the adjusting bolt 21 inwards so that the threaded section 211 of the adjusting bolt 21 is screwed into the screw hole, and the two connecting rods 22 drive the two cutting blades 10 to move outwards, so that the distance between the two cutting blades 10 is increased; then insert one end of the capillary 11 directly into the tube groove 23 of the limit block, and reversely screw the adjusting bolt 21 so that the non-threaded section 210 of the adjusting bolt 21 falls into the screw hole, and the two cutting blades 10 are in contact with the capillary 11 (the two cutting blades 10 are in contact with the capillary 11 under the action of their respective springs 16, and always maintain a certain contact force with the capillary 11, thereby realizing the self-clamping function).

[0051] S2. The driving device drives the pinion 5 to rotate, thereby driving the rotating ring 6 to rotate relative to the fixed ring 2, and then driving the cutting blade 10 to rotate for cutting. At the same time, under the action of the spring 16, the two cutting blades 10 always keep in contact with the capillary 11 until the capillary 11 is cut off.

Claims

1. A self-clamping rotary cutting stainless steel capillary tube cutting device, comprising a supporting unit, a rotating unit and a cutting and clamping unit, characterized in that: The support unit comprises a base (1) and a fixed ring (2), wherein the fixed ring (2) is fixed on the top of the base (1); the rotating unit comprises a driving device (4), a pinion (5) and a rotating ring (6), wherein the driving device (4) and the pinion (5) are fixed on the top of the base (1), and the rotating ring (6) is slidably connected to the inner side of the fixed ring (2) and can rotate around the fixed ring. Notches are provided on the circumferences of the rotating ring (6) and the fixed ring (2), and a docking plate (8) is detachably connected to the notch of the rotating ring (6), thereby forming a complete circular ring. The pinion (5) is meshedly connected with the rotating ring (6), and the driving device (4) can drive the pinion (5) to rotate, thereby driving the rotating ring (6) to rotate relative to the fixed ring (2); the cutting clamping unit comprises a clamping cover, which is fixed to the inner side of the rotating ring (6) through a connecting column (9) and is arranged concentrically with the rotating ring (6). The clamping cover is an openable and closable annular structure, and two pairs of cutting blades (10) are elastically connected to the inner side of the clamping cover. The two pairs of cutting blades (10) can cooperate to clamp the capillary (11) at the center of the rotating ring (6).

2. The self-clamping rotary cutting stainless steel capillary tube cutting device according to claim 1, characterized in that: The clamping cover comprises an upper clamping cover (12) and a lower clamping cover (13), wherein the upper clamping cover (12) and the lower clamping cover (13) form an annular structure, one end of the two are hinged, and the other end is detachably connected, a knife seat (14) is arranged on the inner wall of the upper clamping cover (12) and the lower clamping cover (13) opposite to each other, a moving groove (15) is radially arranged on the knife seat (14), a spring (16) is arranged in the moving groove (15), and a mounting groove for accommodating a cutting blade (10) is also arranged on the knife seat (14), and the cutting blade (10) is arranged on the inner wall of the upper clamping cover (12). 0) is equipped with a blade bolt (17), the blade bolt (17) passes through the movable groove (15) and is connected to the cutting blade (10), so that the cutting blade (10) is slidably fixed on the knife seat (14), and the spring (16) is connected between the outermost end of the movable groove (15) and the blade bolt (17). The spring (16) can squeeze the blade bolt (17) under the action of its own elastic force, so that the two blade bolts (17) are both located at the innermost end of the movable groove (15), so that the two cutting blades (10) are closest to each other.

3. The self-clamping rotary cutting stainless steel capillary tube cutting device according to claim 2, characterized in that: One end of the upper clamping cover (12) and the corresponding end of the lower clamping cover (13) are both provided with a clamping plate (18), and the two clamping plates (18) are detachably connected by a clamping bolt (19), so that the upper clamping cover (12) and the corresponding end of the lower clamping cover (13) form a detachable connection; the other end of the upper clamping cover (12) and the other end of the lower clamping cover (13) are both hinged to the inner end of the connecting column (9) through a rotating shaft, so that the clamping cover can be opened and closed, and the outer end of the connecting column (9) is fixed to the inner wall of the rotating ring (6).

4. The self-clamping rotary cutting stainless steel capillary tube cutting device according to claim 3, characterized in that: The upper clamping cover (12) and the lower clamping cover (13) each occupy half, the upper clamping cover (12) is located on the upper side of the lower clamping cover (13), and the two knife seats (14) are distributed in the middle of the upper clamping cover (12) and the lower clamping cover (13), one above and one below, and there are two connecting columns (9). A crossbeam (20) is connected between the two connecting columns (9). The crossbeam (20) is provided with a screw hole, and an adjusting bolt (21) is provided in the screw hole. The head of the adjusting bolt (21) is outside. The rod portion is provided with a non-threaded section (210), a threaded section (211) and an axial connection section (212) in sequence from the outside to the inside; the axial connection section (212) of the adjusting bolt (21) is connected to a transversely arranged hinge shaft, two connecting rods (22) are hinged on the hinge shaft, and the other ends of the two connecting rods (22) are respectively connected to the two blade bolts (17); and the clamping cover is provided with a rod groove (32) for the two connecting rods (22) to pass through and perform hinged movement.

5. The self-clamping rotary cutting stainless steel capillary tube cutting device according to claim 4, characterized in that: The front and rear sides of the lower blade holder (14) are provided with limiting blocks, and the limiting blocks are provided with a tube groove (23) matching the capillary tube (11). The tube groove (23) can limit the capillary tube (11) between the two cutting blades (10).

6. The self-clamping rotary cutting stainless steel capillary tube cutting device according to claim 1, characterized in that: A gear tooth (24) is arranged circumferentially on the middle part of the outer side of the rotating ring (6), and the pinion (5) meshes with the gear tooth (24). A front wing (25) is arranged on the outer front end of the rotating ring (6), and a rear wing (26) is arranged on the outer rear end of the rotating ring (6). Two sections of the front wing (25) corresponding to the notch are provided with docking grooves (27). The docking plate (8) is inserted between the two docking grooves (27) and fixed by locking bolts to form a complete circular ring. A track groove (28) is arranged circumferentially on the rear wing (26). A plurality of hanging columns are evenly arranged circumferentially on the inner wall of the fixed ring (2), and the hanging columns extend into the track groove (28) and can slide along the track groove (28). The docking plate (8) is also provided with gear teeth (24) and track grooves (28) for connecting with the rotating ring (6).

7. The self-clamping rotary cutting stainless steel capillary tube cutting device according to claim 6, characterized in that: The hanging columns include straight hanging columns (29) and L-shaped hanging columns (30), the straight hanging columns (29) and the L-shaped hanging columns (30) are evenly distributed in the circumferential direction, a circle of track grooves (28) are arranged on the outer side surface of the rear wing (26) corresponding to the straight hanging columns (29), and another circle of track grooves (28) are arranged on the rear side surface of the rear wing (26) corresponding to the L-shaped hanging columns (30), and a cylinder (31) is vertically arranged at one end of the straight hanging columns (29) and the L-shaped hanging columns (30) away from the fixed ring (2), and bearings are arranged at both ends of the cylinder (31), and the cylinder (31) can rotate around the track groove (28) through the bearing, so that the corresponding hanging column can slide along the track groove (28), and then the rotating ring (6) can rotate relative to the fixed ring (2).

8. The self-clamping rotary cutting stainless steel capillary tube cutting device according to claim 1, characterized in that: The driving device (4) is a rotary handle or a rotary motor.

9. A method for using the self-clamping rotary cutting stainless steel capillary tube cutting device according to claim 5, characterized in that: The following steps are involved: S1, first remove the docking plate (8), insert the capillary (11) into the inner side of the rotating ring (6) through the gap between the rotating ring (6) and the fixed ring (2), and then install the docking plate (8) on the rotating ring (6) so that the rotating ring (6) forms a closed circular ring; S2, open the clamping bolts (19) on the upper clamping cover (12) and the lower clamping cover (23), screw the adjusting bolt (21) inwardly, so that the threaded section (211) of the adjusting bolt (21) is screwed into the screw hole, and the two connecting rods (22) drive the two cutting blades (10) to move outwardly, so that the distance between the two cutting blades (10) is increased, and at the same time, the upper clamping cover (12) and the lower clamping cover (23) are opened; then, the capillary (11) is placed into the tube groove (23) of the limit block, and the adjusting bolt (21) is screwed in the opposite direction, so that the non-threaded section (210) of the adjusting bolt (21) falls into the screw hole, and the two cutting blades (10) are in contact with the capillary (11), and finally, the upper clamping cover (12) and the lower clamping cover (13) are fixed together with the clamping bolts (19); S3. The driving device drives the pinion (5) to rotate, thereby driving the rotating ring (6) to rotate relative to the fixed ring (2), and then driving the cutting blade (10) to rotate for cutting. At the same time, under the action of the spring (16), the two cutting blades (10) always keep in contact with the capillary (11) until the capillary (11) is cut off.

10. A method for using the self-clamping rotary cutting stainless steel capillary tube cutting device according to claim 5, characterized in that: The following steps are involved: S1, screwing the adjusting bolt (21) inwards so that the threaded section (211) of the adjusting bolt (21) is screwed into the screw hole, and the two connecting rods (22) drive the two cutting blades (10) to move outwards so that the distance between the two cutting blades (10) is increased; then one end of the capillary tube (11) is directly inserted into the tube groove (23) of the limit block, and the adjusting bolt (21) is screwed in the reverse direction so that the non-threaded section (210) of the adjusting bolt (21) falls into the screw hole, and the two cutting blades (10) are in contact with the capillary tube (11); S2. The driving device drives the pinion (5) to rotate, thereby driving the rotating ring (6) to rotate relative to the fixed ring (2), and then driving the cutting blade (10) to rotate for cutting. At the same time, under the action of the spring (16), the two cutting blades (10) always keep in contact with the capillary (11) until the capillary (11) is cut off.

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