Drainage tube and its processing and forming method and device

Abstract

The present invention belongs to the technical field of fluid medium conveying devices, and particularly relates to a drainage tube and its processing and forming method and device. The drainage tube includes an internal member fixed in a first axial cavity at the end of the drainage tube. A plurality of slot hole portions are formed on the side wall at the end of the drainage tube and are distributed at intervals in the circumferential direction. The internal member is annular and a plurality of annular grooves are formed on its wall body and are distributed at intervals in the axial direction. The annular grooves extend radially towards a second axial cavity of the internal member. The first axial cavity and the second axial cavity communicate axially. The ports of the annular grooves can communicate with the slot hole portions, and a plurality of through holes are distributed on the wall body of the annular grooves. The present invention can improve the conduction performance of the drainage tube, effectively inhibit blockage problems caused by blood clots, pus, etc., enable the end of the drainage tube to stably maintain a good conduction state, and ensure smooth drainage.

Description

Technical Field

[0001] The present invention belongs to the technical field of medium conveying devices, and particularly relates to a drainage tube and its processing and forming method and device. Background Art

[0002] A drainage tube is used for clinical surgical drainage, guiding pus, blood, fluid, etc. accumulated between human tissues or in body cavities to the outside of the body, and is a medical device for preventing postoperative infection and promoting wound healing. There are various types of surgical drainage tubes used clinically, including those for urinary catheterization, those for draining blood stasis from wounds, those for draining fluid from the chest cavity, brain cavity, gastrointestinal tract, biliary tract, etc.

[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 external devices. The drainage tube can drain to the outside by the action of pressure such as internal body pressure, gravity or negative pressure suction, draining the accumulated fluid, exudate or gas in the patient's body to the outside. Drainage tubes for different uses and different parts have certain differences in their pipe diameters and structures. For example, the outer diameters of drainage tubes for the gastrointestinal tract, such as gastric cavity drainage tubes and anal canal drainage tubes, are slightly thicker than those of urethral drainage tubes and bile duct drainage tubes. To facilitate the insertion of one end of the drainage tube into the body and avoid forming too large a wound surface during the insertion path, the outer diameter size of the produced drainage tube is restricted to a certain extent, resulting in a mutually restrictive factor between the anti-blocking performance of the drainage tube and the pipe diameter size. When using existing drainage tubes, the end inserted into the body cavity or between tissues will be squeezed to a certain extent and become flattened, and the conduction cross-section of the port will become relatively narrow, resulting in the problem that the conduction state of the port of the drainage tube is easily affected by blood clots, pus, etc., and the drainage is not smooth. Summary of the Invention

[0004] To overcome the problem that the drainage tube is prone to poor drainage, the present invention provides a drainage tube and its processing and forming method and device. By improving the port structure of the drainage tube, the conduction performance of the drainage tube is improved, effectively inhibiting blockage problems caused by blood clots, pus, etc., so that the end of the drainage tube can stably maintain a good conduction state to ensure smooth drainage. The related drainage tube processing and forming method and device help to firmly maintain the fixed connection state of the end structure of the drainage tube, prevent the built-in part from slipping out of the drainage tube to the outside, and help to ensure the use safety.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a drainage tube, including a tube body and a built-in part. The built-in part is fixed in a section of shaft cavity one corresponding to the end of the tube body of the drainage tube. A plurality of slot hole parts are formed on the side wall of the end of the drainage tube and are distributed at intervals in the circumferential direction.

[0006] The built-in part is annular and has a plurality of annular grooves formed on its wall body and distributed at intervals along the axial direction. The annular grooves extend radially towards the second axial cavity of the built-in part. The first axial cavity and the second axial cavity communicate with each other axially and form a drainage channel.

[0007] The ports of the annular grooves can communicate with the slot hole part, and a plurality of through holes are distributed on the wall body of the annular grooves.

[0008] Optionally, the slot hole part includes a plurality of strip-shaped shaped holes, and the plurality of shaped holes are divided into multiple columns evenly distributed around the circumferential direction, and the plurality of shaped holes in each column are arranged at intervals along the axial direction. The length direction of the shaped holes is along the axial direction of the end of the drainage tube.

[0009] Optionally, the slot hole part further includes a plurality of strip-shaped shaped grooves. The shaped grooves extend axially and one end extends to the free end face of the end of the drainage tube. The plurality of shaped grooves are distributed around the circumferential direction and at least correspond to the part between two adjacent columns of shaped holes. Therefore, one shaped groove can be respectively arranged between each adjacent two columns of shaped holes. At this time, there is one shaped groove between two adjacent columns of shaped holes, and there is also a column of shaped holes corresponding to between two adjacent shaped grooves; it is also possible to only arrange one shaped groove between two adjacent columns of shaped holes. At this time, there is a situation where no shaped groove is arranged between some adjacent two columns of shaped holes.

[0010] Optionally, the slot hole part includes a plurality of strip-shaped shaped grooves. The shaped grooves extend axially and one end extends to the free end face of the end of the drainage tube. The plurality of shaped grooves are evenly distributed at intervals around the circumferential direction.

[0011] Optionally, one end face of the built-in part relatively close to the port of the end of the drainage tube is flush with the end face of the end of the drainage tube. The axial extension length of the shaped groove is not less than the length of the built-in part.

[0012] Optionally, on the two side wall bodies of the annular groove, a sunk groove extending in the radial direction is formed on the inner side wall surface and at least part of the through holes are formed on the bottom surface of the sunk groove; at the same time, a communication groove capable of communicating a plurality of through holes distributed in the same radial direction is formed on the outer side wall surface.

[0013] Optionally, for the plurality of annular grooves distributed at intervals along the axial direction, the depth of the extension towards the axis side in the radial direction shows a trend of gradually increasing from the outside to the inside.

[0014] A processing and forming method for a drainage tube applicable to the above structure includes the following steps:

[0015] Ⅰ) Punch the slot hole part on the wall body of the end of the drainage tube;

[0016] Ⅱ) After coating the outer end of the outer peripheral surface of the built-in part with an adhesive, insert the built-in part into the first axial cavity of the end of the drainage tube so that the outer end face of the built-in part is flush with the end face of the end of the drainage tube;

[0017] Ⅲ) Clamp the outer end side of the built-in part and the end part of the drainage tube in the radial direction, so that the relative peripheral surfaces between the two are closely attached together, and fix and bond / connect the outer end sides of the two together.

[0018] A processing and forming device for a drainage tube applicable to the above structure according to the present invention includes a grooving tool. The grooving tool includes a support sleeve and a first cylinder fixedly connected coaxially. One end of the support sleeve extending into the first cylinder is fixedly connected to the bottom wall of the first cylinder, and an annular groove is formed between the outer peripheral surface of the support sleeve and the inner peripheral surface of the first cylinder.

[0019] The outer diameter of the support sleeve is consistent with the inner diameter of the end part of the drainage tube. A plurality of strip-shaped slot holes extending in the axial direction are provided on the outer peripheral surface of the support sleeve, and the plurality of strip-shaped slot holes are distributed at intervals in the circumferential direction.

[0020] The first cylinder includes a driving part, a plurality of first sliders, and strip-shaped punches fixedly connected to and corresponding to the first sliders one by one. When the first sliders move radially, they can carry the strip-shaped punches to move synchronously.

[0021] The driving part includes an assembly ring one and a bladder cavity containing an annular bladder. The assembly ring one is fixed at the inner ring port of the bladder cavity. A plurality of channels corresponding to and matching the first sliders one by one are formed on the assembly ring one, and one end of the strip-shaped punch fixedly provided on the first slider can extend into the annular groove after passing through the channel.

[0022] The plurality of strip-shaped punches are correspondingly distributed on the outer ring side of the annular groove and are correspondingly matched with the plurality of strip-shaped slot holes distributed on the inner ring side of the annular groove one by one. When the radial thickness of the annular bladder is driven to change by an air pump, the first sliders can be driven to move radially relative to the assembly ring one, and the blade ends of the strip-shaped punches can move radially synchronously, so that the blade ends of the strip-shaped punches can be switched between the moving actions of approaching and departing from the corresponding strip-shaped slot holes.

[0023] Another processing and forming device for a drainage tube applicable to the above structure according to the present invention includes a crimping tool.

[0024] The crimping tool includes a second cylinder, a plurality of radial support arms fixedly arranged in the cylinder cavity of the second cylinder, an assembly ring two 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 assembly ring two.

[0025] A plurality of second sliders are distributed around the circumferential direction and are all matched with the second assembly ring through a slideway structure arranged in the radial direction, so that each second slider can make a sliding motion relative to the second assembly ring. The second slider is in the shape of an arc-shaped plate, and the plurality of second sliders can be distributed on the same circular ring. On one end arc surface of the second slider facing the inner circumferential surface of the cavity of the second cylinder body, a plurality of convex ridges in an arc shape are distributed, and the plurality of convex ridges are distributed at intervals in the axial direction.

[0026] A ring-shaped bladder is fixedly arranged on the second assembly ring, and the second slider is fixedly connected to the outer peripheral surface side of the bladder. When the radial thickness of the bladder 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, and one end arc surface of the second slider facing the inner circumferential surface of the cavity of the second cylinder body can make a moving motion of approaching and departing from the inner circumferential surface of the cavity of the second cylinder body. The air supply pipeline of the air pump unit can be fixedly arranged on the radial support arm to communicate with the bladder.

[0027] 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 ridges on the second slider.

[0028] The beneficial effects of the present invention are as follows: The present invention overcomes the problem that the drainage tube is prone to poor drainage. By improving the port structure of the drainage tube, the conduction performance of the drainage tube is improved, and the blockage problem caused by blood clots, pus, etc. can be effectively suppressed, so that the end of the drainage tube can stably maintain a good conduction state to ensure smooth drainage. The related drainage tube processing and forming method and device help to make the end structure of the drainage tube firmly maintain a fixed connection state, so that the built-in part is not easily slipped out of the drainage tube to the outside, which helps to ensure the use safety. Description of the Drawings

[0029] Figure 1 It is an axial sectional structure schematic diagram of the matching of the end of the drainage tube and the built-in part.

[0030] Figure 2 For Figure 1 The sectional structure schematic diagram at A-A in

[0031] Figure 3 For Figure 1 The partial enlarged structure schematic diagram at I in

[0032] Figure 4 It is an axial sectional structure schematic diagram of the end of the drainage tube.

[0033] Figure 5 It is an axial sectional structure schematic diagram of the built-in part.

[0034] Figure 6 It is a top view structure schematic diagram of the built-in part.

[0035] Figure 7Schematic diagram of the cooperation between the grooving tool and the end of the drainage tube.

[0036] Figure 8 It is Figure 7 Partial enlarged structural schematic diagram at II in [the figure].

[0037] Figure 9 Transverse sectional structural schematic diagram of the support sleeve.

[0038] Figure 10 Structural schematic diagram of the driving part on the first cylinder matching with the second slider.

[0039] Figure 11 Cross-sectional structural schematic diagram of the crimping tool.

[0040] Figure 12 It is Figure 11 Partial enlarged structural schematic diagram at III in [the figure].

[0041] In the figure: 10 is the end of the drainage tube, 11 is the first shaft cavity, 12 is the slot hole part, 121 is the type hole, 122 is the type groove; 20 is the internal part, 21 is the second shaft cavity, 22 is the annular groove, 221 is the through hole, 222 is the counterbore, 223 is the communication groove, 224 is the outer side wall surface, 225 is the inner side wall surface; 30 is the support sleeve, 31 is the strip-shaped slot hole; 40 is the first cylinder, 41 is the driving part, 411 is the first assembly ring, 412 is the bladder cavity, 42 is the first slider, 43 is the strip-shaped punch; 50 is the crimping tool, 51 is the second cylinder, 52 is the radial support arm, 521 is the second assembly ring, 522 is the second slider, 523 is the convex rib, 524 is the electric heating part, 53 is the handle. Detailed implementation mode

[0042] The structures, ratios, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementable conditions of the present invention. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "front", "rear", "middle" and the like cited in this specification are only for the convenience of clear narration and are not used to limit the implementable scope of the present invention. The change or adjustment of their relative relationships, without substantial change of the technical content, should also be regarded as the implementable scope of the present invention.

[0043] Such as Figures 1 to 6A drainage tube as shown includes a drainage tube body (or tube body) and an internal member 20. One end of the drainage tube body forms a drainage tube end portion 10. The internal member 20 is disposed in the first axial cavity 11 of the drainage tube body. Specifically, the internal member 20 is fixedly disposed in a section of the first axial cavity 11 corresponding to the drainage tube end portion 10.

[0044] On the side wall of the drainage tube end portion 10, a plurality of slot portions 12 are formed, and the slot portions 12 are distributed at intervals in the circumferential direction. The slot portions 12 may simultaneously include long-strip-shaped hole patterns 121 and long-strip-shaped grooves 122. The length extension directions of the hole patterns 121 and the grooves 122 are both along the axial direction of the drainage tube end portion 10. The hole patterns 121 are arranged in columns at intervals in the axial direction, and each column contains a plurality of the hole patterns 121 distributed at intervals. One end of the groove 122 extends axially to the free end face of the drainage tube end portion 10. The hole patterns 121 and the grooves 122 may be alternately arranged in the circumferential direction, that is, a column of hole patterns 121 is arranged between every two adjacent grooves 122, and at the same time, a groove 122 is correspondingly arranged between every two adjacent columns of hole patterns 121. The slot portions 12 may also only include a plurality of long-strip-shaped hole patterns 121, and the hole patterns 121 are distributed in multiple columns arranged at intervals in the circumferential direction, and each column contains a plurality of hole patterns 121. The slot portions 12 may also only include a plurality of long-strip-shaped grooves 122, and the grooves 122 are distributed at intervals in the circumferential direction.

[0045] The internal member 20 is annular and a plurality of annular grooves 22 are formed on its wall body and are distributed at intervals in the axial direction. The annular grooves 22 extend radially into the second axial cavity 21 of the internal member 20.

[0046] The first axial cavity 11 and the second axial cavity 21 communicate with each other axially to form a drainage flow channel / drainage channel.

[0047] The (radial side) ports of the annular grooves 22 can communicate with the slot portions 12, and a plurality of through holes 221 are distributed on the wall body of the annular grooves 22. The wall body of the annular grooves 22 includes two side wall bodies opposite to each other in the axial direction (that is Figure 1 And 5 The two side wall bodies opposite to each other in the left-right direction in, both of which are annular) and a bottom wall body in the shape of a cylindrical tube.

[0048] After the internal member 20 is fixed in the first axial cavity 11 of the drainage tube end portion 10, one end face of the internal member 20 relatively close to the port of the drainage tube end portion 10 ( Figure 1The right end face of the built-in part 20 (in []) is flush with the end face of the end part 10 of the drainage tube (i.e., the right end face of the end part 10 of the drainage tube). The axial extension length of the shaped groove 122 is not less than the axial extension length of the built-in part 20.

[0049] As Figure 1 , Figure 2 As shown, on the two side wall bodies of the annular groove 22, sunken grooves 222 extending in the radial direction are formed on their inner side wall surfaces 225, and at least part of the through holes 221 are formed on the inner bottom surfaces of the sunken grooves 222. At the same time, on the two side wall bodies of the annular groove 22, communication grooves 223 capable of communicating with a plurality of through holes 221 distributed in the same radial direction are formed on their outer side wall surfaces 224.

[0050] As Figure 6 As shown, for the three annular grooves 22 distributed at intervals along the axis, the depth of their extension toward the axis side in the radial direction shows a trend of increasing step by step from the outside to the inside (from right to left in the figure). In other words, for the three annular grooves 22 distributed at intervals from the outside to the inside, the inner diameters of their respective bottom wall bodies (all in the shape of a cylindrical barrel) show a trend of decreasing step by step, that is, as shown in the figure, d1 is greater than d2, and d2 is greater than d3.

[0051] The drainage tube involved in the present invention forms a channel structure communicating with its axial cavity 11 on the side wall of the end portion 10 of the drainage tube by providing the slot portion 12 at the end portion 10 of the drainage tube. Correspondingly, after fixing the built-in member 20 to the end portion 10 of the drainage tube, the slot portion 12 is communicated with the annular groove 22 on the built-in member 20, and through holes 221 are distributed on each wall body of the annular groove 22, thereby establishing a communicating flow channel between the peripheral space of the end portion 10 (side wall) of the drainage tube and the axial cavity 21 of the built-in member 20. In view of the fact that the axial cavity 11 and the axial two 21 are coaxially penetrating axial channels, a liquid flow channel capable of communicating with the lumen of the drainage tube is formed at both the right end port and the side wall periphery of the end portion 10 of the drainage tube. On the one hand, the present invention can directly increase the inflow cross-section and the distribution area of the drainage opening, improve the drainage capacity and the ability to resist blockage of the drainage opening, and ensure the smoothness of drainage; on the other hand, because the annular groove 22 is an annular channel extending towards the axis, it can prevent substances such as blood clots and viscous pus entering from the right port (of the end portion 10 of the drainage tube or the built-in member 20) from converging into the deep lumen of the drainage tube in a large amount, quickly and concentratedly, and can effectively inhibit the situation of excessive blockage at the end portion 10 of the drainage tube; at the same time, part of the blood clots, viscous pus and other substances can flow into the annular groove 22, and after being divided by the through holes 221, they become smaller blocks and then slowly enter the lumen of the drainage tube and are discharged, achieving the purpose of effectively inhibiting the occurrence of the situation of excessive blockage at the end portion 10 of the drainage tube; in addition, the alternating arrangement structure of multiple annular grooves 22 can also enable the end portion 10 of the drainage tube to have the ability to maintain a large drainage cross-section, keep the drainage capacity of the drainage tube in a good state, and better ensure the smoothness of drainage.

[0052] After specifically designing the slot portion 12 as a long-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 substances such as blood stasis and viscous substances enter the annular groove 22 from the hole 121 or the groove 122, the blood stasis and viscous substances will be cut and their volume will become smaller, and it is easier to pass through the through holes 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 / stiffness of the end portion 10 of the drainage tube can be significantly reduced, and after it is fixedly combined with the built-in member 20, the radial support strength / stiffness at the end portion 10 of the drainage tube can be effectively weakened, preventing the situation that the end portion 10 of the drainage tube may cause excessive extrusion to internal organs, organs, etc. after being placed in the body.

[0053] The annular structure of the annular groove 22 itself can endow the fluid entering its interior with a relatively large free flow space and has the ability to resist serious blockage at a certain location. After the communication grooves 223 and the sinking grooves 222 associated with the through holes 221 are respectively arranged on the outer side wall surface 224 and the inner side wall surface 225 of the side wall body of the annular groove 22, the flow capacity of the fluid in the annular groove 22 can be further improved, the flow path of the fluid can be diversified and variable, and the situation that the peripheral flow channel is completely blocked due to the accumulation of more blood clots and other substances at a certain location is not likely to occur, which helps to keep the built-in part 20 in a good diversion state and enables the end part 10 of the drainage tube to maintain a good drainage state, so as to ensure the smooth drainage of the drainage tube.

[0054] For the three annular grooves 22 distributed at intervals along the axial direction, the depth of their radial extension towards the axis side shows a trend of gradually increasing from the outside to the inside, which can improve the anti-blocking ability of the (right) port of the built-in part 20 or the end part 10 of the drainage tube, can form multiple barrier structures arranged at intervals in the axial direction, while extending the crawling path length of substances such as blood clots and pus, can also form a relatively long buffer space in the axial direction, enabling substances such as blood clots to flow through the area of the end part 10 of the drainage tube gradually and dispersedly over a relatively long time, effectively avoiding the excessive concentration and short-time convergence of too many blood clots, pus and other substances at the right port, effectively inhibiting the occurrence of excessive blockage of the (right) port, and promoting the end part 10 of the drainage tube to maintain a good drainage state.

[0055] In addition, for the three annular grooves 22 distributed at intervals along the axial direction, the depth of their radial extension towards the axis side shows a trend of gradually increasing from the outside to the inside, which can also increase the average value of the radial extension depth 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 depth of the annular groove 22 is generally controlled between 1 / 4 and 1 / 3 of the inner diameter size of the built-in part 20. If the radial extension depths of the multiple annular grooves 22 are arranged according to the above gradient change state, the radial extension depth of the innermost annular groove 22 can exceed 2 / 5 of the inner diameter of the built-in part 20, and even reach the proportion of 1 / 2.

[0056] As Figures 7 to 12 shown, the processing and forming device of the drainage tube applicable to the above structure includes a grooving tool and a crimping tool 50, and the grooving tool includes a support sleeve 30 and a first cylinder 40 which are coaxially and fixedly connected.

[0057] As Figures 7 to 10 shown, the grooving tool includes a support sleeve 30 and a first cylinder 40 which are coaxially and fixedly connected.

[0058] One end of the support sleeve 30 extending into the first cylinder 40 is fixedly connected to the bottom wall of the first cylinder 40, and an annular groove is formed between the outer peripheral surface of the support sleeve 30 and the inner peripheral surface of the first cylinder 40. When machining the slot portion 12 on the end portion 10 of the drainage tube, the end portion 10 of the drainage tube 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 end portion 10 of the drainage tube. A plurality of strip-shaped slot holes 31 extending in the axial direction are provided on the outer peripheral surface of the support sleeve 30, and the plurality of strip-shaped slot holes 31 are distributed at intervals in the circumferential direction. The outer diameter of the support sleeve 30 is consistent with the inner diameter of the end portion 10 of the drainage tube.

[0059] The first cylinder 40 includes a driving portion 41, a plurality of first sliders 42, and strip-shaped punches 43 fixedly connected in one-to-one correspondence with the first sliders 42. The structure of the cutting edge end of the strip-shaped punch 43 needs to be adapted to the structure of the slot portion 12 designed specifically.

[0060] The driving portion 41 includes an air pump unit, a first assembly ring 411, and a bladder cavity 412 containing an annular bladder. The bladder cavity 412 is annular and an annular port is formed on the inner ring side. The first assembly ring 411 is fixed on the inner ring side port of the bladder cavity 412 and can block the annular bladder in the bladder cavity 412. A plurality of channels / radial channels corresponding to the first sliders 42 in one-to-one correspondence are formed on the first assembly ring 411, and one end of the strip-shaped punch 43 fixedly provided on the first slider 42 can extend through the channel and into the annular groove, and one end of the first slider 42 remaining in the bladder cavity 412 is fixedly connected to the annular bladder.

[0061] The plurality of strip-shaped punches 43 are correspondingly distributed on the outer ring side of the annular groove and are in one-to-one correspondence with the plurality of strip-shaped slot holes 31 distributed on the inner ring side of the annular groove. The length of the strip-shaped punch 43 extends in the axial direction and the thickness extends in the radial direction. The cutting edge end of the strip-shaped punch 43 can be inserted into the corresponding strip-shaped slot hole 31.

[0062] When driving the air pump unit to drive the radial thickness of the annular bladder to change, the first slider 42 can be driven to move radially relative to the first assembly ring 411, so that the cutting edge ends of the strip-shaped punches 43 move radially synchronously. During this period, the cutting edge ends of the strip-shaped punches 43 can alternately approach and move away from the corresponding strip-shaped slot holes 31. When the cutting edge end of the strip-shaped punch 43 moves towards the outer ring side of the annular groove and reaches the end of the stroke, the radial distance between the cutting edge end and the outer peripheral surface of the support sleeve 30 should be significantly greater than the wall thickness of the end portion 10 of the drainage tube.

[0063] AsFigures 11 to 12 As shown, the crimper 50 includes a second cylinder 51, four radial support arms 52 fixedly arranged in the cavity of the second cylinder 51, a second assembly ring 521 fixed to the ends of the radial support arms 52 and arranged in the cavity of the second cylinder 51, and a plurality of second sliders 522 arranged on the second assembly ring 521. The second sliders 522 are in the shape of arc-shaped plates, and the plurality of second sliders 522 can 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 in the circumferential direction and are all matched with the second assembly ring 521 through a slideway structure arranged in the radial direction, so that each second slider 522 can slide (radially) relative to the second assembly ring 521. On one end arc surface of the second slider 522 facing the inner peripheral surface of the cavity of the second cylinder 51, a plurality of arc-shaped convex ridges 523 are distributed, and the plurality of convex ridges 523 are distributed at intervals in the axial direction.

[0064] A ring-shaped bladder is fixedly arranged on the second assembly ring 521, and the second sliders 522 are all fixedly connected to the outer peripheral surface side of the bladder. When the radial thickness of the bladder is driven to change, the second sliders 522 can be driven to move radially relative to the second assembly ring 521, so that one end arc surface of the second slider 522 facing the inner peripheral surface of the second cylinder 51 can alternately move closer to and away from the inner peripheral surface of the cavity of the second cylinder 51.

[0065] An electric heating part 524 is arranged on the bottom wall of the second cylinder 51, and the electric heating part 524 can heat the convex ridges 523 on the second slider 522. A channel structure can be arranged on the body of the second slider 522, and the electric heating tube of the electric heating part 524 can (directly or indirectly) contact the wall body inside the convex ridge 523, so that heat energy can be quickly conducted to the convex ridge 523, and the convex ridge 523 can reach the required temperature. The body of the second slider 522 can be an adiabatic part, and the convex ridge 523 is formed by fixedly arranging a heat conducting part (ring-shaped part) on the body. The electric heating tube of the electric heating part 524 extends into the channel structure of the body (directly or indirectly) and contacts the heat conducting part to conduct heat to the convex ridge 523.

[0066] One ends of the plurality of radial support arms 52 facing the axis side are fixedly connected to one end of a handle 53 at the same time, and the other end of the handle 53 axially passes through the bottom wall of the second cylinder 51 and extends to the outside of the second cylinder 51. A channel communicating with the pipeline connecting the bladder can be arranged on the handle 53. A connection nozzle is formed at the free end of the handle 53, and the connection nozzle is connected to the air pump unit by a hose.

[0067] During operation, after the built-in part 20 is installed at the port of the first shaft cavity 11 of the end part 10 of the drainage tube, the end part 10 of the drainage tube is inserted into the cavity of the second cylinder 51. At that time, the outer peripheral surface of the end part 10 of the drainage tube faces the inner peripheral surface of the cavity of the second cylinder 51 (the relative peripheral surfaces of the two are basically close and almost in contact, and the radial distance between the relative peripheral surfaces of the two does not exceed 0.5 mm); the inner peripheral surface of the port of the built-in part 20 faces the outer peripheral surface of the second assembly ring 521. At that time, driven by the bladder, the second slider 522 can make the arc surface provided with the convex ribs 523 continuously approach the inner peripheral surface of the built-in part 20 and finally contact the inner peripheral surface of the built-in part 20. When the second slider 522 is continuously driven by the bladder to move radially outward, the second slider 522 and the second cylinder 51 can squeeze the port of the built-in part 20 and the port of the end part 10 of the drainage tube, and squeeze the relative surfaces of the two together. During the hot pressing process, the wall of the port of the built-in part 20 is heated and softened, so that the fluidity of the wall material becomes stronger and it is easy to be reshaped, and a clamping projection fixed connection structure can be formed with the end part 10 of the drainage tube, see Figure 1 , Figure 3 . It is also possible to simultaneously heat the inner peripheral wall of the second cylinder 51 by the electric heating part 524. A bonding adhesive layer is coated between the docking surfaces of the built-in part 20 and the end part 10 of the drainage tube.

[0068] The above embodiments only illustrate the principles and effects of the present invention by way of example, rather than limiting the present invention. There are many aspects of the present invention that can be improved without departing from the overall idea. Those who are familiar with this technology can modify or change the above embodiments without departing from 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 idea 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, which are alternately distributed in the circumferential direction and are circumferentially continuous; 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 groove (22) extends 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); 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).

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 alternately arranged 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 (122) 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, characterized in that: An end surface of a port on the built-in component (20) that is relatively close to the end surface of the drainage tube end (10) is flush with the end surface of the drainage tube end (10); 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: 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.

7. A method for processing and forming the drainage tube according to any one of claims 1 to 6, 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 inner 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.

8. A processing and forming device suitable for the drainage tube according to any one of claims 1 to 6, 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 alternately distributed in the circumferential direction; The cylinder body (40) comprises a driving part (41), a plurality of first sliders (42), and strip 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 corresponding to the first slider (42) are formed on the assembly ring (411), 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 correspondingly distributed on the outer ring side of the annular groove and 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) can move radially relative to the assembly ring (411), and the blade end of the strip punch (43) can synchronously move radially, so that the blade end of the strip punch (43) can switch to approach and move away from the corresponding strip slot hole (31).

9. A processing and forming device suitable for the drainage tube according to any one of claims 1 to 6, characterized in that: The crimping device (50) comprises a second cylinder (51), a plurality of radial support arms (52) fixedly arranged in a cylinder cavity of the second cylinder (51), a second assembly ring (521) fixed at the end of the radial support arm (52) and arranged in the cylinder cavity of the second cylinder (51), and a plurality of second sliders (522) arranged 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) through a slideway structure arranged in a radial direction; the second slider (522) is in an arc plate shape and enables the plurality of second sliders (522) to be distributed on the same circular ring; A plurality of arc-shaped ridges (523) are distributed on the arc surface of one end of the second sliding block (522) facing the inner peripheral surface of the cylinder cavity of the second cylinder body (51), and the plurality of ridges (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 part (524) is provided on the bottom wall of the second cylinder (51), and the electric heating part (524) can heat the convex ridge (523) on the second sliding block (522).

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