Drainage tube and processing and forming method and device thereof

Abstract

The invention belongs to the technical field of fluid medium conveying instruments, and particularly relates to a drainage tube and a machining forming method and device thereof, and the drainage tube comprises a built-in piece fixed in a first shaft cavity at the end of the drainage tube. A plurality of slotted hole parts which are distributed at intervals in the circumferential direction are formed in the side wall of the end part of the drainage tube. The built-in piece is annular, and a plurality of annular grooves which are distributed at intervals in the axial direction are formed in the wall body of the built-in piece. The annular groove extends towards the second shaft cavity of the built-in piece in the radial direction. The first shaft cavity and the second shaft cavity are communicated in the axial direction. The end opening of the annular groove can be communicated with the groove hole part, and a plurality of through holes are distributed in the wall body of the annular groove. According to the drainage tube, the conduction performance of the drainage tube can be improved, the blocking problem caused by extravasated blood blocks, pus and the like can be effectively restrained, the end of the drainage tube can stably keep a good conduction state, and smooth drainage is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of medium conveying equipment, and in particular relates to a drainage tube and a processing and forming method and device thereof. Background Art

[0002] Drainage tubes are used for clinical surgical drainage. They are medical devices that guide pus, blood, and fluids accumulated between human tissues or in body cavities to the outside of the body to prevent postoperative infection and promote wound healing. There are many types of surgical drainage tubes used clinically, including those for urinary catheterization, those for draining blood from wounds, and those for draining effusions from the chest cavity, brain cavity, gastrointestinal tract, and bile duct.

[0003] Drainage tubes are generally made of materials such as silicone rubber or polyurethane. When in use, one end of the drainage tube is inserted into the drainage site in the body cavity or between tissues, and the other end of the drainage tube remains outside the body and can be connected to other extracorporeal devices. The drainage tube can drain to the outside of the body with the help of pressure such as body pressure, gravity or negative pressure suction, and drain the patient's body effusion, exudate or gas to the outside of the body. Drainage tubes for different purposes and used in different parts will have certain differences in diameter and structure. For example, the outer diameter of drainage tubes used in the gastrointestinal tract, such as gastric cavity drainage tubes and anal drainage tubes, is slightly thicker than that of urethral drainage tubes and bile duct drainage tubes. In order to facilitate the insertion of one end of the drainage tube into the body and avoid the formation of too large a wound in the insertion path, the outer diameter of the drainage tube produced will be subject to certain restrictions, which will form a mutually restrictive factor between the anti-blocking performance of the drainage tube and the diameter size. When using the existing drainage tube, the end inserted into the body cavity or between tissues will be squeezed to a certain extent and become flattened, and the conductive cross-section of the port will become relatively narrow, making the port conductive state of the drainage tube easily affected by blood clots, pus, etc., resulting in poor drainage. Summary of the invention

[0004] In order to overcome the problem of poor drainage in drainage tubes, the present invention provides a drainage tube and a processing and forming method and device thereof, which improves the conduction performance of the drainage tube by improving the port structure of the drainage tube, can effectively suppress the blockage caused by blood clots, pus, etc., and enable the end of the drainage tube to stably maintain a good conduction state to ensure smooth drainage. The related drainage tube processing and forming method and device help to ensure that the end structure of the drainage tube is firmly maintained in a fixed connection state, and the internal parts are not easy to slip out of the drainage tube to the outside, which helps to ensure safety in use.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a drainage tube, comprising a tube body and an internal component. The internal component is fixed in a section of an axial cavity corresponding to the end of the drainage tube on the tube body. A plurality of slots are formed on the side wall of the end of the drainage tube and are distributed alternately in the circumferential direction.

[0006] The built-in component is annular and has a plurality of annular grooves distributed alternately along the axial direction formed on its wall. The annular grooves extend radially toward the axial cavity 2 of the built-in component. The axial cavity 1 and the axial cavity 2 are connected in the axial direction to form a drainage channel.

[0007] The port of the annular groove can be communicated with the slot portion, and a plurality of through holes are distributed on the wall of the annular groove.

[0008] Optionally, the slot portion includes a plurality of strip-shaped holes, and the plurality of holes are divided into a plurality of rows evenly distributed around the circumference, and the plurality of holes in each row are alternately arranged along the axial direction. The length direction of the holes is along the axial direction of the end of the drainage tube.

[0009] Optionally, the slot portion further includes a plurality of slots in the form of long strips. The slots extend axially and one end of the slots extends to the free end surface of the end of the drainage tube. The plurality of slots are distributed around the circumferential direction and correspond to at least two adjacent rows of slots. Therefore, a slot can be respectively arranged between each two adjacent rows of slots, in which case there is a slot between two adjacent rows of slots, and a row of slots is also arranged between two adjacent slots; or only one slot can be arranged between two adjacent rows of slots, in which case there is no slot arranged between two adjacent rows of slots.

[0010] Optionally, the slot portion includes a plurality of strip-shaped grooves, the grooves extending axially and one end of which extends to the free end surface of the end of the drainage tube, and the plurality of grooves are evenly spaced around the circumference.

[0011] Optionally, an end surface of a port on the built-in component that is relatively close to the end of the drainage tube is flush with the end surface of the end of the drainage tube. The axial extension length of the groove is not less than the length of the built-in component.

[0012] Optionally, on the two side walls of the annular groove, a groove extending in the radial direction is formed on the inner wall surface and at least part of the through holes are formed on the bottom surface of the groove; at the same time, a connecting groove that can connect multiple through holes distributed in the same radial direction is formed on the outer wall surface.

[0013] Optionally, the depths of the plurality of annular grooves distributed alternately along the axial direction and extending toward the axial centerline in the radial direction show a trend of gradually increasing from the outside to the inside.

[0014] The processing and forming method of the drainage tube applicable to the above structure comprises the following steps: Ⅰ) Punching a slot on the wall of the end of the drainage tube; II) After applying adhesive to the outer end of the outer peripheral surface of the built-in component, the built-in component is inserted into the axial cavity 1 of the end of the drainage tube so that the outer end surface of the built-in component is flush with the end surface of the end of the drainage tube; III) Clamping the outer end of the built-in component and the end of the drainage tube in the radial direction to bring the relative circumferential surfaces of the two into close contact, thereby fixing and bonding / connecting the outer end of the two together.

[0015] The present invention relates to a processing and forming device for a drainage tube of the above structure, comprising a slotter. The slotter comprises a support sleeve and a cylinder body 1 which are coaxially fixedly connected. One end of the support sleeve extending into the cylinder body 1 is fixedly connected to the bottom wall of the cylinder body 1, and an annular groove is formed between the outer circumference of the support sleeve and the inner circumference of the cylinder body 1.

[0016] The outer diameter of the support sleeve is consistent with the inner diameter of the end of the drainage tube. A plurality of strip-shaped slots extending in the axial direction are arranged on the outer peripheral surface of the support sleeve, and the plurality of strip-shaped slots are alternately distributed in the circumferential direction.

[0017] The cylinder body 1 includes a driving part, a plurality of first sliders, and strip punches which are matched with and fixedly connected to the first sliders in a one-to-one correspondence. When the first sliders move in the radial direction, they can carry the strip punches to move synchronously.

[0018] The driving part includes an assembly ring 1 and a capsule cavity containing a circular capsule. The assembly ring 1 is fixed to the inner ring port of the capsule cavity. A plurality of grooves are formed on the assembly ring 1, which correspond to the first slider one by one, and one end of the strip punch fixed on the first slider can pass through the groove and then extend into the annular groove.

[0019] The plurality of strip punches are correspondingly distributed on the outer ring side of the annular groove, and are matched one by one with the plurality of strip slots distributed on the inner ring side of the annular groove. When the radial thickness of the annular capsule is changed by using an air pump, the first slider can be driven to move radially relative to the assembly ring, and the blade end of the strip punch is synchronously moved radially, so that the blade end of the strip punch switches between the movement action of approaching and moving away from the corresponding strip slot.

[0020] The present invention relates to another processing and forming device suitable for the drainage tube of the above structure, comprising a crimper.

[0021] The crimper comprises a second cylinder, a plurality of radial support arms fixed in the cylinder cavity of the second cylinder, a second assembly ring fixed at the end of the radial support arms and arranged in the cylinder cavity of the second cylinder, and a plurality of second sliders arranged on the second assembly ring.

[0022] The plurality of second sliders are distributed around the circumferential direction and are matched with the second assembly ring through a slideway structure arranged along the radial direction, so that each second slider can slide relative to the second assembly ring. The second slider is in the shape of an arc plate and the plurality of second sliders can be distributed on the same circular ring. A plurality of arc-shaped convex ridges are distributed on the arc surface of one end of the second slider facing the inner circumference of the cylinder cavity of the second cylinder body, and the plurality of convex ridges are distributed alternately in the axial direction.

[0023] An annular capsule is fixedly provided on the second assembly ring, and the second slider is fixedly connected to the outer peripheral surface of the capsule. When the radial thickness of the capsule is driven to change by the configured air pump unit, the second slider can be driven to move radially relative to the second assembly ring, so that the second slider moves toward and away from the inner peripheral surface of the barrel cavity of the second barrel toward the arc surface of one end of the barrel cavity. The air delivery pipeline of the air pump unit can be fixedly provided on the radial support arm to communicate with the capsule.

[0024] An electric heating part is arranged on the bottom wall of the second cylinder body so that the electric heating part can heat the convex edge on the second sliding block.

[0025] The beneficial effects of the present invention are as follows: the present invention overcomes the problem of poor drainage in the drainage tube, and improves the conduction performance of the drainage tube by improving the port structure of the drainage tube, which can effectively suppress the blockage caused by blood clots, pus, etc., and enable the end of the drainage tube to stably maintain a good conduction state to ensure smooth drainage. The related drainage tube processing and forming method and device help to promote the end structure of the drainage tube to maintain a fixed connection state firmly, so that the internal parts are not easy to slip out of the drainage tube to the outside, which helps to ensure safe use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the axial cross-sectional structure of the matching of the drainage tube end and the built-in component.

[0027] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle.

[0028] Figure 3 for Figure 1 Schematic diagram of the local enlarged structure at point I in the middle.

[0029] Figure 4 It is a schematic diagram of the axial cross-sectional structure of the end of the drainage tube.

[0030] Figure 5 Schematic diagram of the axial cross-sectional structure of the built-in component.

[0031] Figure 6 Schematic diagram of the top view of the built-in components.

[0032] Figure 7A schematic diagram of the cooperation between the slotter and the end of the drainage tube.

[0033] Figure 8 for Figure 7 Schematic diagram of the local enlarged structure at II in the middle.

[0034] Fig. 9 It is a schematic diagram of the transverse cross-sectional structure of the support casing.

[0035] Fig.10 It is a schematic diagram of the structure in which the driving part on the cylinder body 1 matches the second sliding block.

[0036] Fig.11 It is a schematic diagram of the cross-sectional structure of the crimper.

[0037] Fig.12 for Fig.11 Schematic diagram of the local enlarged structure at point III in the middle.

[0038] In the figure: 10 drainage tube end, 11 axial cavity one, 12 slot portion, 121 type hole, 122 type slot; 20 built-in component, 21 axial cavity two, 22 annular groove, 221 through hole, 222 sink groove, 223 connecting groove, 224 outer wall, 225 inner wall; 30 support sleeve, 31 strip slot; 40 cylinder body one, 41 drive part, 411 assembly ring one, 412 capsule cavity, 42 first slider, 43 strip punch; 50 crimper, 51 cylinder body two, 52 radial support arm, 521 assembly ring two, 522 second slider, 523 convex ridge, 524 electric heating part, 53 handle. DETAILED DESCRIPTION

[0039] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0040] like Figures 1 to 6A drainage tube shown in the figure comprises a drainage tube body (or tube body) and an internal component 20. One end of the drainage tube body is formed as a drainage tube end 10. The internal component 20 is arranged in an axial cavity 11 of the drainage tube body, and specifically, the internal component 20 is fixedly arranged in a section of the axial cavity 11 corresponding to the drainage tube end 10.

[0041] A plurality of slots 12 are formed on the side wall of the drainage tube end 10, and the slots 12 are alternately distributed around the circumferential direction. The slots 12 can include both a long strip-shaped hole 121 and a long strip-shaped groove 122, and the length extension direction of the hole 121 and the groove 122 are along the axial direction of the drainage tube end 10. The holes 121 are alternately arranged in rows in the axial direction, and each row contains a plurality of holes 121 alternately distributed. One end of the groove 122 extends axially to the free end face of the drainage tube end 10. The holes 121 and the grooves 122 can be arranged alternately in the circumferential direction, that is, a row of holes 121 is arranged between each two adjacent grooves 122, and a groove 122 is correspondingly arranged between each two adjacent rows of holes 121. The slot portion 12 may also include only a plurality of strip-shaped holes 121, and the holes 121 are distributed in a plurality of rows arranged alternately around the circumference, and each row includes a plurality of holes 121. The slot portion 12 may also include only a plurality of strip-shaped grooves 122, and the grooves 122 are distributed alternately around the circumference.

[0042] The inner component 20 is annular and has a plurality of annular grooves 22 distributed alternately along the axial direction formed on its wall. The annular grooves 22 extend radially toward the axial cavity 21 of the inner component 20 .

[0043] The first axial cavity 11 and the second axial cavity 21 are connected to each other in the axial direction to form a drainage channel.

[0044] The (radial side) port of the annular groove 22 can communicate with the slot portion 12, and a plurality of through holes 221 are distributed on the wall of the annular groove 22. The wall of the annular groove 22 includes two side walls (i.e. Figure 1 and 5 The invention comprises two side walls which are opposite to each other in the left and right directions, both of which are in the shape of a circular ring, and a bottom wall which is in the shape of a cylindrical tube.

[0045] After the built-in component 20 is fixed in the axial cavity 11 of the drainage tube end portion 10, the end surface ( Figure 1The right end face of the built-in component 20 in the inner wall is flush with the end face of the drainage tube end 10 (ie, the right end face of the drainage tube end 10). The axial extension length of the groove 122 is not less than the axial extension length of the built-in component 20.

[0046] like Figure 1 , Figure 2 As shown, on both side walls of the annular groove 22, a recessed groove 222 extending in the radial direction is formed on the inner wall surface 225 thereof, and at least part of the through holes 221 is formed on the inner bottom surface of the recessed groove 222. At the same time, on both side walls of the annular groove 22, a connecting groove 223 capable of connecting a plurality of through holes 221 distributed in the same radial direction is formed on the outer wall surface 224 thereof.

[0047] like Figure 6 As shown, the depth of the three annular grooves 22 distributed alternately along the axial direction extending toward the axis center line in the radial direction shows a trend of gradually increasing from the outside to the inside (from the right to the left in the figure). In other words, the inner diameter of the bottom wall of each of the three annular grooves 22 distributed alternately from the outside to the inside (all in the shape of a cylinder) shows a trend of gradually decreasing, that is, as shown in the figure, d1 is greater than d2, and d2 is greater than d3.

[0048] The drainage tube of the present invention is provided with the slotted hole portion 12 at the drainage tube end portion 10, and a channel structure communicating with the axial cavity 11 thereof is formed on the side wall of the drainage tube end portion 10. Correspondingly, after the built-in component 20 is fixed to the drainage tube end portion 10, the slotted hole portion 12 is communicated with the annular groove 22 on the built-in component 20, and through holes 221 are evenly distributed on each wall of the annular groove 22, so that a communicating flow channel is established between the peripheral space of the drainage tube end portion 10 (side wall) and the axial cavity 21 of the built-in component 20. In view of the fact that the axial cavity 11 and the axial cavity 21 are coaxially connected axial channels, a liquid flow channel that can communicate with the lumen of the drainage tube is formed at the right end port and the periphery of the side wall at the drainage tube end portion 10. On the one hand, the present invention can directly increase the inflow cross-section of the drainage port and the distribution area, thereby improving the drainage capacity and the ability to resist blockage of the drainage port, thereby ensuring the smoothness of the drainage; on the other hand, because the annular groove 22 is an annular groove extending in the direction close to the axis, it can prevent the blood clots, viscous pus and other substances entering from the right port (of the drainage tube end 10 or the built-in component 20) from gathering in large quantities, quickly and concentratedly into the deep part of the drainage tube cavity, and can effectively inhibit the excessive blockage of the drainage tube end 10. shape; at the same time, it can make a part of the blood clots, viscous pus and other substances flow into the annular groove 22, and after being divided by the through hole 221, they become smaller blocks, and slowly enter the lumen of the drainage tube and are discharged, so as to effectively suppress the excessive blockage of the drainage tube end 10; in addition, the alternate arrangement structure of the plurality of annular grooves 22 can also enable the drainage tube end 10 to have the ability to maintain a larger drainage cross-section, which can promote the drainage capacity of the drainage tube to remain in a good state, and can better ensure the patency of the drainage.

[0049] After the slot portion 12 is specifically designed as a long strip-shaped hole 121 and a groove 122, the ability of the slot portion 12 to resist blockage can be improved. Under the action of negative pressure, when blood stasis, viscous substances, etc. are forced to enter the annular groove 22 through the hole 121 or the groove 122, the blood stasis, viscous substances, etc. will be cut and reduced in volume, and it is easier to pass through the through hole 221 and be smoothly drained out of the body. In addition, after the hole 121 and the groove 122 are arranged in combination, the support strength / rigidity of the drainage tube end 10 can be significantly reduced, and after being fixedly combined with the built-in component 20, the radial support strength / rigidity at the drainage tube end 10 can be effectively weakened, which can prevent the drainage tube end 10 from being excessively squeezed on the internal organs after being placed in the body.

[0050] The annular structure of the annular groove 22 itself can give the fluid entering it a larger free flow space, and it has the ability to resist serious blockage at a certain place. On the two side walls of the annular groove 22, after the connecting groove 223 and the sinking groove 222 associated with the through hole 221 are respectively arranged on the outer wall surface 224 and the inner wall surface 225 of the side wall, the flow capacity of the fluid in the annular groove 22 can be further improved, and the flow path of the fluid is diversified and variable, and the situation that the peripheral flow channel is completely blocked due to the accumulation of a large number of blood clots and other substances at a certain place is not allowed to occur, which helps to keep the built-in component 20 in a good diversion state, and can keep the drainage tube end 10 in a good drainage state, so as to ensure the smooth drainage of the drainage tube.

[0051] The depth of the three annular grooves 22 extending in the radial direction toward the axis centerline tends to increase gradually from the outside to the inside, which can improve the ability of the built-in component 20 or the (right) port of the drainage tube end 10 to resist blockage, and can form a multi-channel barrier structure arranged alternately in the axial direction. While extending the creeping path length of blood clots, pus and other substances, it can also form a longer buffer space in the axial direction, so that blood clots and other substances can gradually and dispersedly flow through the drainage tube end 10 area over a long period of time, which can effectively prevent excessive blood clots, pus and other substances from being overly concentrated and gathered at the right port in a short period of time, and can effectively inhibit the occurrence of excessive blockage of the (right) port, so as to enable the drainage tube end 10 to maintain a good drainage state.

[0052] In addition, the depths of the three annular grooves 22 distributed alternately along the axial direction extending toward the axis centerline in the radial direction are gradually increased from the outside to the inside, which can also increase the average value of the radial extension depths of the multiple annular grooves 22. That is, if the radial extension depths of the multiple annular grooves 22 are basically the same (or the gradient change is not obvious), the radial extension depths of the annular grooves 22 are generally controlled to be between 1 / 4 and 1 / 3 of the inner diameter of the built-in component 20. If the radial extension depths of the multiple annular grooves 22 are arranged according to the above-mentioned gradient change state, the radial extension depth of the annular groove 22 located at the innermost end can exceed 2 / 5 of the inner diameter of the built-in component 20, and can even reach a ratio of 1 / 2.

[0053] like Figures 7 to 12 The processing and forming device for the drainage tube of the above structure shown includes a slotter and a crimper 50, and the slotter includes a supporting sleeve 30 and a cylinder 40 which are coaxially fixedly connected.

[0054] like Figures 7 to 10 As shown, the slotting device includes a supporting sleeve 30 and a cylinder 40 which are coaxially fixedly connected.

[0055] One end of the support sleeve 30 extending into the cylinder body 40 is fixedly connected to the bottom wall of the cylinder body 40, and an annular groove is formed between the outer circumferential surface of the support sleeve 30 and the inner circumferential surface of the cylinder body 40. When processing the slot hole portion 12 on the drainage tube end 10, the drainage tube end 10 is extended into the annular groove, so the axial extension length of the annular groove is not less than the axial extension length of the drainage tube end 10. A plurality of strip slots 31 extending in the axial direction are provided on the outer circumferential surface of the support sleeve 30, and the plurality of strip slots 31 are alternately distributed around the circumferential direction. The outer diameter of the support sleeve 30 is consistent with the inner diameter of the drainage tube end 10.

[0056] The cylinder 1 40 includes a driving part 41, a plurality of first sliders 42, and a strip punch 43 which is matched and fixedly connected to the first sliders 42 in a one-to-one correspondence. The blade end structure of the strip punch 43 needs to be adapted to the structure of the slot portion 12 of the specific design.

[0057] The driving part 41 includes an air pump unit, an assembly ring 411 and a capsule cavity 412 containing a circular capsule. The capsule cavity 412 is annular and has an annular port formed on the inner ring side. The assembly ring 411 is fixed to the inner ring side port of the capsule cavity 412, and can seal the circular capsule in the capsule cavity 412. A plurality of grooves / radial grooves are formed on the assembly ring 411, which correspond to the first slider 42 one by one, and one end of the strip punch 43 is fixed on the first slider 42, which can pass through the groove and extend into the annular groove. One end of the first slider 42 retained in the capsule cavity 412 is fixedly connected to the circular capsule.

[0058] The plurality of strip punches 43 are correspondingly distributed on the outer ring side of the annular groove, and are matched one by one with the plurality of strip slots 31 distributed on the inner ring side of the annular groove. The length of the strip punch 43 extends in the axial direction, and the thickness extends in the radial direction. The blade end of the strip punch 43 can be inserted into the strip slot 31 that matches it.

[0059] When the air pump unit is driven to change the radial thickness of the annular capsule, the first slider 42 can be driven to move radially relative to the assembly ring 1 411, so that the blade ends of each strip punch 43 can be synchronously moved radially. During this period, the blade ends of each strip punch 43 can be switched to approach and move away from the corresponding strip slot 31. When the blade end of the strip punch 43 moves toward the outer ring side of the annular groove and reaches the end of the stroke, the radial spacing between the blade end and the outer peripheral surface of the support sleeve 30 should be significantly greater than the tube wall thickness of the drainage tube end 10.

[0060] like Figure 11 to Figure 12 As shown, the crimper 50 includes a cylinder body 51, four radial support arms 52 fixed in the cylinder cavity of the cylinder body 51, an assembly ring 521 fixed at the end of the radial support arm 52 and arranged in the cylinder cavity of the cylinder body 51, and a plurality of second sliders 522 arranged on the assembly ring 521. The second slider 522 is in the shape of an arc plate and enables a plurality of second sliders 522 to be distributed on the same circular ring. The number of the second sliders 522 can be two, three, four, six, or more. Moreover, the plurality of second sliders 522 are sequentially distributed around the circumferential direction and are matched with the assembly ring 521 through a slideway structure arranged in the radial direction, so that each second slider 522 can slide relative to the assembly ring 521 (in the radial direction). A plurality of arc-shaped convex ridges 523 are distributed on the arc surface of one end of the second slider 522 facing the inner circumference of the cylinder cavity of the cylinder body 51, and the plurality of convex ridges 523 are alternately distributed in the axial direction.

[0061] An annular capsule is fixedly provided on the second assembly ring 521, and the second slider 522 is fixedly connected to the outer peripheral surface of the capsule. When the radial thickness of the capsule is driven to change, the second slider 522 can be driven to move relative to the second assembly ring 521 in the radial direction, so that the arc surface of the second slider 522 facing the inner peripheral surface of the second cylinder 51 can be switched to move closer to and away from the inner peripheral surface of the cylinder cavity of the second cylinder 51.

[0062] An electric heating part 524 is provided on the bottom wall of the second cylinder 51, so that the electric heating part 524 can heat the ridge 523 on the second slider 522. A cavity structure can be provided on the body of the second slider 522, and the electric heating pipe of the electric heating part 524 can (directly or indirectly) contact the wall inside the ridge 523, so that the heat energy is quickly transferred to the ridge 523, so that the ridge 523 can reach the required temperature. The body of the second slider 522 can be a heat insulating member, and the ridge 523 is formed by fixing a heat conducting member (ring member) on the body, and the electric heating pipe of the electric heating part 524 (directly or indirectly) extends into the cavity structure of the body, contacts the heat conducting member and transfers the heat to the ridge 523.

[0063] One end of the plurality of radial support arms 52 facing the axis is fixedly connected to one end of a handle 53, and the other end of the handle 53 passes through the bottom wall of the second cylinder 51 in the axial direction and extends to the outside of the second cylinder 51. A channel connected to the pipeline connected to the capsule can be provided on the handle 53. A connecting end nozzle is formed at the free end of the handle 53, and the connecting end nozzle is connected to the air pump unit by a hose.

[0064] During operation, after the built-in component 20 is installed at the port of the axial cavity 11 of the drainage tube end 10, the drainage tube end 10 is extended into the barrel cavity of the barrel body 2 51. At that time, the outer peripheral surface of the drainage tube end 10 faces the inner peripheral surface of the barrel cavity of the barrel body 2 51 (the relative peripheral surfaces of the two are basically close to each other and almost in contact, so that the radial spacing between the relative peripheral surfaces of the two does not exceed 0.5mm); the inner peripheral surface of the port of the built-in component 20 is opposite to the outer peripheral surface of the second assembly ring 521. At that time, the second slider 522, under the drive of the capsule, can make its arc surface with the convex ridge 523 constantly approach the inner peripheral surface of the built-in component 20, and finally can contact the inner peripheral surface of the built-in component 20. When the second slider 522 is driven to move radially outward by the capsule, the second slider 522 and the second cylinder 51 can press the port of the built-in component 20 and the port of the drainage tube end 10, and squeeze the opposite surfaces of the two together. During the hot pressing process, the wall of the port of the built-in component 20 is heated and softened, and the fluidity of the wall material is enhanced, which is easy to be reshaped and can form a fixed connection structure with the drainage tube end 10. See Figure 1 , Figure 3 The electric heating part 524 can also heat the inner peripheral wall side of the second cylinder 51. An adhesive layer is coated between the butt joint surface between the built-in component 20 and the end portion 10 of the drainage tube.

[0065] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A drainage tube, characterized in that: It comprises an internal component (20) fixed in an axial cavity (11) at an end portion (10) of a drainage tube; a plurality of slots (12) are formed on the side wall of the end portion (10) of the drainage tube and are distributed alternately in a circumferential direction; The built-in component (20) is annular and has a plurality of annular grooves (22) distributed alternately along the axial direction formed on its wall; the annular grooves (22) extend radially toward the second axial cavity (21) of the built-in component (20); the first axial cavity (11) and the second axial cavity (21) are axially connected; the port of the annular groove (22) can be connected to the slot portion (12), and a plurality of through holes (221) are distributed on the wall of the annular groove (22).

2. The drainage tube according to claim 1, characterized in that: The slot hole portion (12) comprises a plurality of strip-shaped holes (121), and the plurality of holes (121) are divided into a plurality of rows evenly distributed in a circumferential direction, and the plurality of holes (121) in each row are arranged alternately along the axial direction.

3. The drainage tube according to claim 2, characterized in that: The slot hole portion (12) further comprises a plurality of strip-shaped grooves (122); the grooves (122) extend axially and one end of the grooves (122) extends to the free end surface of the drainage tube end portion (10); the plurality of grooves (122) are distributed in a circumferential direction and correspond to at least two adjacent rows of holes (121).

4. The drainage tube according to claim 1, characterized in that: The slot hole portion (12) comprises a plurality of strip-shaped grooves (122); the grooves (122) extend axially and one end of the grooves extends to the free end surface of the drainage tube end portion (10); and the plurality of grooves (122) are evenly spaced around the circumference.

5. The drainage tube according to claim 3 or 4, characterized in that: An end surface of a port on the built-in component (20) that is relatively close to the end portion (10) of the drainage tube is flush with the end surface of the end portion (10) of the drainage tube; and an axial extension length of the groove (122) is not less than the length of the built-in component (20).

6. The drainage tube according to claim 1, characterized in that: On the two side walls of the annular groove (22), a recessed groove (222) extending in a radial direction is formed on the inner wall surface (225), and at least part of the through holes (221) are formed on the bottom surface of the recessed groove (222), and a connecting groove (223) capable of connecting a plurality of through holes (221) distributed in the same radial direction is formed on the outer wall surface (224).

7. The drainage tube according to claim 1, characterized in that: The depths of the plurality of annular grooves (22) distributed alternately along the axial direction and extending toward the axial centerline in the radial direction tend to increase gradually from the outside to the inside.

8. A method for processing and forming the drainage tube according to any one of claims 1 to 7, characterized in that The steps include: Ⅰ) machining a slot portion (12) on the wall of the end portion (10) of the drainage tube; II) After applying adhesive to the outer end of the outer peripheral surface of the built-in component (20), the built-in component (20) is inserted into the axial cavity (11) of the drainage tube end portion (10) so that the outer end surface of the built-in component (20) is flush with the end surface of the drainage tube end portion (10); III) Clamping the outer end of the built-in component (20) and the end of the drainage tube (10) in the radial direction so that the outer end of the two are fixedly connected together.

9. A processing and forming device for a drainage tube according to any one of claims 1 to 7, characterized in that: The invention comprises a slotting device; the slotting device comprises a supporting sleeve (30) and a cylinder body (40) which are coaxially fixedly connected; one end of the supporting sleeve (30) extending into the cylinder body (40) is fixedly connected to the bottom wall of the cylinder body (40), and an annular groove is formed between the outer peripheral surface of the supporting sleeve (30) and the inner peripheral surface of the cylinder body (40); The outer diameter of the support sleeve (30) is consistent with the inner diameter of the drainage tube end (10); a plurality of strip-shaped slots (31) extending in the axial direction are provided on the outer circumferential surface of the support sleeve (30), and the plurality of strip-shaped slots (31) are distributed alternately in the circumferential direction; The cylinder body (40) comprises a driving portion (41), a plurality of first sliders (42), and strip-shaped punches (43) matched with and fixedly connected to the first sliders (42) in a one-to-one correspondence; The driving part (41) comprises an assembly ring (411) and a capsule cavity (412) containing a circular capsule; the assembly ring (411) is fixed to the inner ring port of the capsule cavity (412); a plurality of grooves are formed on the assembly ring (411) and correspond to the first slider (42) one by one, and one end of the first slider (42) fixed with a strip punch (43) passes through the groove and then extends into the annular groove; A plurality of strip punches (43) are distributed on the outer ring side of the annular groove and are matched one by one with a plurality of strip slot holes (31) distributed on the inner ring side of the annular groove; the radial thickness of the annular capsule is driven to change, so that the first slider (42) moves radially relative to the assembly ring (411), and the blade end of the strip punch (43) moves synchronously in the radial direction, so that the blade end of the strip punch (43) switches to approach and move away from the corresponding strip slot hole (31).

10. A processing and forming device for a drainage tube according to any one of claims 1 to 7, characterized in that: The crimping device (50) comprises a second cylinder (51), a plurality of radial support arms (52) fixedly disposed in a cylinder cavity of the second cylinder (51), a second assembly ring (521) fixed to the ends of the radial support arms (52) and disposed in the cylinder cavity of the second cylinder (51), and a plurality of second sliders (522) disposed on the second assembly ring (521); A plurality of second sliders (522) are distributed in a circumferential direction and are matched with the second assembly ring (521) via a slideway structure arranged in a radial direction; the second slider (522) is in an arc-shaped plate shape and enables the plurality of second sliders (522) to be distributed on the same circular ring; a plurality of arc-shaped convex edges (523) are distributed on an arc surface at one end of the second slider (522) facing the inner circumference of the cylinder cavity of the second cylinder body (51), and the plurality of convex edges (523) are distributed alternately in the axial direction; An annular capsule is fixedly provided on the second assembly ring (521), and the second slider (522) is fixedly connected to the outer peripheral surface of the capsule; the radial thickness of the capsule is driven to change, so that the second slider (522) can move radially relative to the second assembly ring (521), thereby enabling the second slider (522) to switchably approach and move away from the inner peripheral surface of the barrel cavity of the second barrel (51); An electric heating portion (524) is provided on the bottom wall of the second cylinder (51), and the electric heating portion (524) can heat the convex ridge (523) on the second sliding block (522).

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