Multi-cavity PICC (Peripherally Inserted Central Catheter) flushing and sealing device

Abstract

The invention discloses a multi-cavity PICC (Peripherally Inserted Central Catheter) flushing and sealing device, which relates to the technical field of needleless injectors, and comprises a transmission unit, a first transmission column and a second transmission column which are arranged on the surface of a shell in a penetrating manner, an adjusting mechanism arranged on the surface of a supporting bridge in a penetrating manner, a driving rod arranged in a first movable groove, and a rack arranged on the surface of a dovetail strip, the ratchet wheel and the spring are sleeved on one side of the second transmission column. The device has the beneficial effects that the screw adjusting mechanism is adopted to control the transmission ratio, and the ratchet wheel and the rack are matched, so that the consistency of injection frequency and dosage during pulse type pipe washing is ensured, and stable pushing injection and accurate dosing during conventional injection can also be realized.

Description

Technical Field

[0001] The invention relates to the technical field of needle-free syringes, in particular to a multi-cavity PICC catheter flushing and sealing tube device. Background Art

[0002] In response to the development of PICC catheter flushing and sealing technology, multiple solutions such as single-tube push injection, dual-tube synchronous push injection and pulse flushing have been gradually developed in clinical practice. As the most basic operation method, single-tube push injection technology realizes catheter flushing and sealing by manually controlling the syringe advancement, but it faces many technical difficulties in clinical application: the push speed is difficult to maintain constant, resulting in uneven drug distribution; the manual push pressure fluctuates significantly, and there is a risk of catheter damage; long-term operation causes operator fatigue and affects the accuracy of operation. The dual-tube synchronous push injection technology realizes the synchronous operation of dual syringes through a Y-type connector or a three-way device. Although it has certain advantages in rapid infusion, the control difficulty is increased, the problem of uneven pressure distribution is prominent, and there is a risk of blood return and drug reflux. The pulse flushing technology generates water flow disturbance through intermittent push injection, which improves the cleaning effect of the inner wall of the catheter, but this technology requires a high level of technical skills from the operator, and the push force and rhythm are difficult to standardize.

[0003] The existing PICC catheter flushing and sealing technology has a common technical bottleneck in clinical application, such as low standardization of operation and great influence of human factors. Specifically, it is difficult to accurately control the pressure and speed of manual injection, resulting in unstable flushing effect; the operation process depends on the experience of the operator, and individual differences are significant; long-term operation can easily cause fatigue, affecting medical safety; when using multi-lumen catheters, the maintenance requirements of each lumen are different, which increases the complexity of operation and the risk of infection. Summary of the invention

[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a multi-lumen PICC catheter sealing tube device, which can solve the problems mentioned in the background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-lumen PICC catheter sealing tube device, comprising a shell, including a plug-in box arranged on the side of the surface thereof, a plurality of waist-shaped grooves penetrating the surface of the plug-in box, a clamping block arranged in the middle of the shell surface, a plurality of arc-shaped grooves penetrating one side of the clamping block, a receiving groove arranged on the other side of the shell surface, a first movable groove and a second movable groove respectively arranged on the two side walls of the shell, a first elastic sheet arranged inside the first movable groove, a dovetail strip arranged on the other surface of the shell, and a support bridge arranged between the two side walls of the shell;

[0007] The transmission unit includes a first transmission column and a second transmission column which are arranged through the surface of the shell, an adjustment mechanism which is arranged through the surface of the support bridge, a driving rod which is arranged inside the first movable groove, a rack which is arranged on the surface of the dovetail bar, and a ratchet and a spring which are sleeved on one side of the second transmission column.

[0008] As a preferred solution of the multi-lumen PICC catheter sealing tube device of the present invention, the first transmission column includes a right truncated cone, a first gear arranged on the outer edge below the right truncated cone, and a first limiting column arranged at the bottom of the right truncated cone.

[0009] As a preferred solution of the multi-lumen PICC catheter sealing tube device described in the present invention, the second transmission column includes a frustum, a plurality of second spring plates arranged on the outer edge below the frustum, a second limiting column arranged at the bottom of the frustum, and a button arranged at the end of the second limiting column.

[0010] As a preferred solution of the multi-lumen PICC catheter sealing tube device of the present invention, the ratchet and the spring are sequentially sleeved on the second limiting column.

[0011] As a preferred solution of the multi-lumen PICC catheter sealing tube device of the present invention, wherein: the adjustment mechanism includes a screw rod and a friction wheel sleeved on the outside of the screw rod;

[0012] The screw rod is threadedly connected to the support bridge and is arranged obliquely; the friction wheel is tightly fitted with the side walls of the regular truncated cone and the inverted truncated cone respectively.

[0013] As a preferred solution of the multi-lumen PICC catheter sealing tube device of the present invention, the driving rod comprises a circular arc gear arranged at one end thereof, a stop block arranged at the end of the circular arc gear, a reset groove penetrating the surface of the driving rod, and a third stop column arranged on the surface of the other end of the driving rod;

[0014] The circular arc gear is meshed with and inscribed on the first gear; the first elastic sheet is located inside the reset groove.

[0015] As a preferred solution of the multi-lumen PICC catheter sealing tube device of the present invention, the rack includes a dovetail groove arranged on its surface, an extension rod arranged at one end of the rack, and a paddle arranged at the end of the extension rod;

[0016] The rack is meshed with the ratchet; the dovetail groove is matched with the dovetail bar, and the rack moves axially along the dovetail bar; the paddle extends out of the accommodating groove and extends.

[0017] As a preferred solution of the multi-lumen PICC catheter sealing tube device of the present invention, the ratchet wheel includes ratchet teeth arranged on its surface and a second gear arranged on the outer edge of the ratchet wheel.

[0018] As a preferred embodiment of the multi-lumen PICC catheter sealing device of the present invention, it further comprises an injection unit, including a plurality of needle-free syringes, a plurality of positive pressure connectors, a Y-shaped catheter, and a connecting block;

[0019] The connecting block can fix a plurality of the positive pressure connectors at the same time and cooperate with the inside of the plug-in box.

[0020] As a preferred solution of the multi-lumen PICC catheter sealing tube device of the present invention, it further comprises a pair of sealing covers arranged on both sides of the support bridge.

[0021] The beneficial effects of the present invention are as follows: a smooth transition between pulsed flushing and conventional injection modes is achieved, and the compatibility and convenience of PICC catheter maintenance and operation are improved. The device uses a screw adjustment mechanism to control the transmission ratio, and cooperates with a ratchet and a rack to ensure the consistency of injection frequency and dosage during pulsed flushing, and can also achieve stable push injection and precise drug delivery during conventional injection. By optimizing the traditional finger pressure operation to a hand pressure operation, the stability and accuracy of the operation are effectively improved, and the operating difficulty and fatigue of medical staff are significantly reduced, especially in the scenario of dual-tube synchronous push injection, which avoids uneven push pressure between the two tubes. This design effectively prevents clinical risks such as vascular wall damage, catheter breakage, and drug deposition caused by improper push force, while reducing the incidence of blood return and drug reflux, providing safer and more reliable technical support for clinical PICC catheter maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is an overall three-dimensional schematic diagram of the present invention.

[0024] Figure 2 It is an exploded view of the injection unit of the present invention.

[0025] Figure 3 It is a structural view of the transmission unit of the present invention.

[0026] Figure 4 It is an exploded view of the transmission unit of the present invention.

[0027] Figure 5 It is a three-dimensional full cross-sectional view of the present invention.

[0028] Figure 6 It is a supplementary view of the overall structure of the present invention.

[0029] In the figure: 1, housing; 11, plug-in box; 12, waist-shaped groove; 13, snap-fit ​​block; 14, arc-shaped groove; 15, receiving groove; 16, first movable groove; 17, second movable groove; 18, first spring piece; 19, dovetail bar; 110, supporting bridge; 2, transmission unit; 21, first transmission column; 22, second transmission column; 23, adjustment mechanism; 24, driving rod; 25, rack; 26, ratchet; 27, spring; 211, round table; 212, first gear; 213, second gear A limiting column; 221, an inverted truncated table; 222, a second spring piece; 223, a second limiting column; 224, a button; 231, a screw; 232, a friction wheel; 241, an arc gear; 242, a limiting block; 243, a reset groove; 244, a third limiting column; 251, an extension rod; 252, a paddle; 261, a ratchet; 262, a second gear; 3, an injection unit; 31, a needle-free syringe; 32, a positive pressure connector; 33, a Y-shaped catheter; 34, a connecting block; 4, a sealing cover. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1

[0034] Reference Figure 1 to Figure 6, which is the first embodiment of the present invention, and provides a multi-lumen PICC catheter sealing device, which includes a housing 1, including a plug-in box 11 arranged on the side of the surface thereof, a plurality of waist-shaped grooves 12 penetrating the surface of the plug-in box 11, a clamping block 13 arranged in the middle of the surface of the housing 1, a plurality of arc-shaped grooves 14 penetrating one side of the clamping block 13, a receiving groove 15 arranged on the other side of the surface of the housing 1, a first movable groove 16 and a second movable groove 17 respectively arranged on the two side walls of the housing 1, a first elastic sheet 18 arranged inside the first movable groove 16, a dovetail strip 19 arranged on the other surface of the housing 1, and a supporting bridge 110 arranged between the two side walls of the housing 1;

[0035] The transmission unit 2 includes a first transmission column 21 and a second transmission column 22 which are arranged through the surface of the shell 1, an adjustment mechanism 23 which is arranged through the surface of the support bridge 110, a driving rod 24 which is arranged inside the first movable groove 16, a rack 25 which is arranged on the surface of the dovetail bar 19, and a ratchet 26 and a spring 27 which are sleeved on one side of the second transmission column 22.

[0036] Furthermore, the first transmission column 21 includes a right truncated platform 211, a first gear 212 disposed on the outer edge of the right truncated platform 211, and a first limiting column 213 disposed at the bottom of the right truncated platform 211.

[0037] Furthermore, the second transmission column 22 includes a rounded platform 221 , a plurality of second elastic pieces 222 arranged below and extending from the rounded platform 221 , a second limiting column 223 arranged at the bottom of the rounded platform 221 , and a button 224 arranged at the end of the second limiting column 223 .

[0038] Furthermore, the ratchet 26 and the spring 27 are sequentially sleeved on the second limiting column 223 .

[0039] Furthermore, the adjustment mechanism 23 includes a screw rod 231 and a friction wheel 232 sleeved on the outside of the screw rod 231;

[0040] The screw rod 231 is threadedly connected to the support bridge 110 and is disposed obliquely; the friction wheel 232 is tightly fitted with the side walls of the right truncated platform 211 and the inverted truncated platform 221 respectively.

[0041] Furthermore, the driving rod 24 includes a circular arc gear 241 disposed at one end thereof, a stopper 242 disposed at the end of the circular arc gear 241, a reset groove 243 disposed through the surface of the driving rod 24, and a third stopper column 244 disposed on the surface of the other end of the driving rod 24;

[0042] The circular arc gear 241 is meshed with and inscribed in the first gear 212 ; the first elastic piece 18 is located inside the reset groove 243 .

[0043] Furthermore, the rack 25 includes a dovetail groove disposed on its surface, an extension rod 251 disposed at one end of the rack 25 , and a paddle 252 disposed at the end of the extension rod 251 ;

[0044] The rack 25 meshes with the ratchet 26; the dovetail groove cooperates with the dovetail bar 19, and the rack 25 moves axially along the dovetail bar 19; the paddle 252 extends out of the receiving slot 15 and extends.

[0045] Furthermore, the ratchet 26 includes ratchet teeth 261 disposed on the surface thereof, and a second gear 262 disposed on the outer edge of the ratchet 26 .

[0046] Furthermore, it also includes an injection unit 3, including a plurality of needle-free syringes 31, a plurality of positive pressure connectors 32, a Y-shaped catheter 33, and a connection block 34;

[0047] The connection block 34 can fix a plurality of positive pressure connectors 32 at the same time and cooperate with the inside of the plug-in box 11 .

[0048] Furthermore, it also includes a pair of sealing covers 4 arranged on both sides of the supporting bridge 110 .

[0049] It should be noted that multi-lumen PICC catheters are generally used when a large amount of fluid is rapidly injected or two drugs need to be given at the same time, and can also be used for single-catheter injections. Usually a Y-type connector or a three-way device is used, and the use of a single or multi-lumen PICC catheter is determined according to the medication needs.

[0050] In order to prevent blood from flowing back into the catheter and reduce the risk of catheter blockage, a positive pressure connector 32 is connected to the entrance of the Y-shaped catheter 33, and the needle-free syringe 31 is fixed to the positive pressure connector 32 by plugging or threading. When the last 0.5 ml is pushed out to about half, the catheter clamp begins to be clamped until the remaining solution is pushed out and the catheter clamp is completely clamped. At this time, the liquid is squeezed forward a short distance, thereby achieving positive pressure tube sealing.

[0051] Preferably, a plug-in box 11 is fixed to the outermost side of the surface of the housing 1, and there is a cavity inside the plug-in box 11, and there are at least two half-waist-shaped grooves 12 running through both sides of the plug-in box 11. In this embodiment, there are two. The waist-shaped grooves 12 are open on one side, and the positive pressure connector 32 can be placed therein. The connecting block 34 can fix at least two positive pressure connectors 32, and the fixing method can be in the form of clamping, bonding, etc. In this embodiment, two positive pressure connectors 32 are fixed, and the cross-section of the connecting block 34 is L-shaped, so it can be inserted into the cavity inside the plug-in box 11. At this point, the two positive pressure connectors 32 are clamped on the housing 1, and the positive pressure connectors 32 can also be easily replaced.

[0052] A locking block 13 is fixed in the middle of the shell 1 surface, and at least two arc grooves 14 are opened on one side of the locking block 13 and completely penetrate through, which can be used to lock at least two needle-free injection syringes 31. In this embodiment, there are two arc grooves 14 and two needle-free injection syringes 31.

[0053] On the surface of the shell 1, at a position opposite to the plug-in box 11, a through accommodating groove 15 is opened. The end of the accommodating groove 15 away from the plug-in box 11 is narrow, and the end close to the plug-in box 11 is wide. The narrow end can be used to restrict the stroke of the rack 25, and the wide end can facilitate the insertion and placement of the end of the barrel of the needle-free syringe 31.

[0054] In addition, at the other surface of the housing 1, a first movable groove 16 and a second movable groove 17 are respectively provided on the two side walls. The first movable groove 16 is wider than the second movable groove 17. The first movable groove 16 can facilitate the driving rod 24 as a whole to swing without motion interference. The second movable groove 17 does not cause motion interference at the end of the arc gear 241 when the driving rod 24 swings. A first elastic sheet 18 is also fixed at one end of the first movable groove 16 near the receiving groove 15, and the first elastic sheet 18 points to the outside of the housing 1.

[0055] On the same side of the first movable groove 16 and the second movable groove 17, a dovetail bar 19 is fixed to the other surface of the shell 1, and the dovetail bar 19 points from the position of the plug-in box 11 to the accommodating groove 15. Finally, a supporting bridge 110 is fixed to the two side walls where the first movable groove 16 and the second movable groove 17 are located.

[0056] Preferably, the first transmission column 21 and the second transmission column 22 are similar in shape, and both penetrate the surface of the housing 1 where the dovetail bar 19 is located, and the two do not contact each other. Specifically, the first transmission column 21 is adjacent to the plug-in box 11, and its main part is a right truncated cone 211, which is small at the top and large at the bottom. A first gear 212 consisting of a plurality of teeth is fixed on the outer edge of the round bottom of the right truncated cone 211, and a first limiting column 213 is fixed at the bottom center of the right truncated cone 211. The first limiting column 213 penetrates the other surface of the housing 1, and the first transmission column 21 is axially limited by the disc at the end of the first limiting column 213, so that the first transmission column 21 can only move in the circumferential direction. Similarly, the main part of the second transmission column 22 is an inverted frustum 221, which has a larger top and a smaller bottom. A plurality of second spring pieces 222 distributed circumferentially are fixed to the bottom of the inverted frustum 221, and then a second limiting column 223 is fixed to the bottom center of the inverted frustum 221. The second limiting column 223 is longer than the first limiting column 213 and also passes through the other surface of the shell 1. At this time, a spring 27 is sleeved on the part where the second limiting column 223 passes through. Since the button 224 is fixed at the end of the second limiting column 223, the spring 27 applies a force to the button 224 to axially limit the second transmission column 22. At this time, the second transmission column 22 can move circumferentially.

[0057] Preferably, the ratchet 26 is sleeved on the portion of the second limiting column 223 that does not pass through the other surface of the housing 1, and is close to the bottom surface of the inverted truncated cone 221. The surface of the ratchet 26 is provided with a plurality of axially distributed ratchet teeth 261, and the second elastic piece 222 falls exactly between the ratchet teeth 261, so when the second transmission column 22 rotates clockwise, it can drive the ratchet 26 to rotate, and when it rotates counterclockwise, the second elastic piece 222 skips the ratchet teeth 261 and cannot drive the ratchet 26 to rotate. In addition, a second gear 262 consisting of a plurality of teeth is fixed on the side wall of the ratchet 26.

[0058] Preferably, the driving rod 24 is L-shaped as a whole, and a third limiting column 244 is fixed at one end of the driving rod 24. The third limiting column 244 is adjacent to the first elastic sheet 18 and completely penetrates the other surface of the housing 1, and the driving rod 24 is axially limited by the disc at the end of the third limiting column 244, so that the driving rod 24 can only swing in the first movable groove 16 with the third limiting column 244 as the axis. A circular arc gear 241 is fixed at the other end of the driving rod 24, and the circular arc gear 241 passes through the second movable groove 17 and a limiting block 242 is fixed at its end. The limiting block 242 can limit the travel of the driving rod 24. A through reset groove 243 is also opened on the surface of the driving rod 24, and a second elastic sheet 222 is arranged in the reset groove 243, so that the driving rod 24 always maintains the state of the rod body extending out of the first movable groove 16 without the action of external force, and the limiting block 242 is stuck at the notch of the second movable groove 17.

[0059] It should be noted that the teeth of the arc gear 241 point to its own center and mesh with the first gear 212, so when a person presses the drive rod 24, the drive rod 24 retracts into the first movable groove 16 and drives the first transmission column 21 to rotate clockwise.

[0060] Preferably, the rack 25 is meshed with the second gear 262, and when the second transmission column 22 rotates, the rack 25 can move axially toward the plug-in box 11. An extension rod 251 is fixed to the end of the rack 25 facing the receiving slot 15, and the end of the extension rod 251 is aligned with the center line of the housing 1, and a paddle 252 is fixed to the end of the extension rod 251, which passes through the receiving slot 15, and the paddle 252 is just close to the tail of the pusher of the needle-free injector 31. Therefore, when the rack 25 can move axially toward the plug-in box 11, the needle-free injector 31 can perform an injection action.

[0061] Preferably, an adjustment mechanism 23 is further provided between the first transmission column 21 and the second transmission column 22. Since the gap between the right truncated cone 211 and the inverted truncated cone 221 is oblique, the adjustment mechanism 23 is correspondingly arranged obliquely. Specifically, the screw 231 is threadedly connected to the support bridge 110 in an oblique manner, and is located exactly inside the gap between the right truncated cone 211 and the inverted truncated cone 221. An annular groove is provided near the tail of the screw 231, and the friction wheel 232 is sleeved on the outer wall of the groove, so that the friction wheel 232 can freely rotate in the circumferential direction. It should be noted that the outer wall of the friction wheel 232 is tightly fitted with the side walls of the positive circular table 211 and the inverted circular table 221 respectively. When the first transmission column 21 rotates clockwise, the second transmission column 22 rotates clockwise accordingly, and the first transmission column 21 rotates counterclockwise when the driving rod 24 is reset. At this time, the first transmission column 21 drives the second transmission column 22 to rotate counterclockwise, and the ratchet 26 no longer moves.

[0062] The position of the friction wheel 232 can be changed by turning the screw rod 231 . Since the gaps between the side walls of the right truncated cone 211 and the inverted truncated cone 221 are consistent, the transmission ratio between the two can be changed.

[0063] During use, when pulsed flushing is required, the screw 231 needs to be turned to reduce the transmission ratio between the first transmission column 21 and the second transmission column 22. At this time, when the drive rod 24 is pressed, the first transmission column 21 and the second transmission column 22 both rotate clockwise, thereby driving the ratchet 26 to rotate clockwise, causing the paddle 252 on the rack 25 to squeeze one or more needle-free syringes 31. At this time, the rack 25 advances less and can perform a quick and small amount of injection. When the drive rod 24 is released, the first transmission column 21 and the second transmission column 22 both rotate counterclockwise. At this time, the ratchet 26 is not driven, so the rack 25 no longer moves, the injection stops, and there is an injection interval during the resetting process of the drive rod 24. This reciprocating process can maintain the consistency of the frequency and injection volume of the pulsed flushing, avoid damaging the blood vessel wall or the catheter when the push force is too large, and fail to achieve the expected flushing effect when the force is too small, which is easy to form drug deposition. In addition, it can also avoid irregular push rhythm causing a shortened catheter life and increased catheter damage risk.

[0064] It should be noted that a certain friction force is required between the rack 25 and the dovetail bar 19 to overcome the force of the second transmission column 22 passing over the ratchet 26 counterclockwise, so that the ratchet 26 is stationary and the rack 25 itself does not move in the reverse direction spontaneously.

[0065] When conventional drug injection is required, the transmission ratio is adjusted to the maximum. When the person presses the drive rod 24, the amount of advancement of the rack 25 will increase. With the swing of the drive rod 24, the drug can be completely and quantitatively injected from beginning to end. Compared with the traditional injection method, this device can convert finger pressure into hand pressure, and the control ability can be improved, thereby ensuring the operation speed and accuracy, preventing uneven drug distribution, reducing artificial push pressure fluctuations, and avoiding the risk of catheter damage. In addition, it can also reduce fatigue caused by long-term operation. In particular, during double-tube injection, it can reduce the control difficulty during simultaneous push injections, reduce the uneven distribution of push pressure between the two tubes or within a single tube, thereby reducing the risk of catheter damage and vascular damage, blood return, and drug reflux.

[0066] All of the above can be controlled by fine-tuning the screw 231 to control the injection volume and injection frequency of the pulse injection and the injection speed and injection volume of the conventional injection.

[0067] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-lumen PICC catheter sealing device, characterized in that: include, A shell (1) comprises a plug-in box (11) arranged on the side of its surface, a plurality of waist-shaped grooves (12) penetrating the surface of the plug-in box (11), a locking block (13) arranged in the middle of the surface of the shell (1), a plurality of arc-shaped grooves (14) penetrating one side of the locking block (13), a receiving groove (15) arranged on the other side of the surface of the shell (1), a first movable groove (16) and a second movable groove (17) respectively arranged on the two side walls of the shell (1), a first elastic sheet (18) arranged inside the first movable groove (16), a dovetail strip (19) arranged on the other surface of the shell (1), and a supporting bridge (110) arranged between the two side walls of the shell (1); The transmission unit (2) comprises a first transmission column (21) and a second transmission column (22) which are arranged through the surface of the housing (1), an adjustment mechanism (23) which is arranged through the surface of the support bridge (110), a driving rod (24) which is arranged inside the first movable groove (16), a rack (25) which is arranged on the surface of the dovetail bar (19), and a ratchet (26) and a spring (27) which are sleeved on one side of the second transmission column (22).

2. The multi-lumen PICC catheter sealing tube device according to claim 1, characterized in that: The first transmission column (21) comprises a right truncated table (211), a first gear (212) arranged on the outer edge of the bottom of the right truncated table (211), and a first limiting column (213) arranged on the bottom of the right truncated table (211).

3. The multi-lumen PICC catheter sealing tube device according to claim 2, characterized in that: The second transmission column (22) comprises an inverted rounded platform (221), a plurality of second elastic sheets (222) arranged at the bottom of the inverted rounded platform (221), a second limiting column (223) arranged at the bottom of the inverted rounded platform (221), and a button (224) arranged at the end of the second limiting column (223).

4. The multi-lumen PICC catheter sealing tube device according to claim 3, characterized in that: The ratchet (26) and the spring (27) are sequentially sleeved on the second limiting column (223).

5. The multi-lumen PICC catheter sealing tube device according to claim 4, characterized in that: The adjusting mechanism (23) comprises a screw rod (231) and a friction wheel (232) sleeved on the outside of the screw rod (231); The screw rod (231) is threadedly connected to the support bridge (110) and is arranged obliquely; the friction wheel (232) is tightly fitted with the side walls of the regular truncated cone (211) and the inverted truncated cone (221), respectively.

6. The multi-lumen PICC catheter sealing tube device according to claim 5, characterized in that: The driving rod (24) comprises a circular arc gear (241) arranged at one end thereof, a limiting block (242) arranged at the end of the circular arc gear (241), a reset groove (243) penetratingly arranged on the surface of the driving rod (24), and a third limiting column (244) arranged on the surface of the other end of the driving rod (24); The circular arc gear (241) is meshed with and inscribed in the first gear (212); the first elastic sheet (18) is located inside the reset groove (243).

7. The multi-lumen PICC catheter sealing tube device according to claim 6, characterized in that: The rack (25) comprises a dovetail groove arranged on its surface, an extension rod (251) arranged at one end of the rack (25), and a paddle (252) arranged at the end of the extension rod (251); The rack (25) is meshed with the ratchet (26); the dovetail groove cooperates with the dovetail bar (19), and the rack (25) moves axially along the dovetail bar (19); the paddle (252) extends out of the accommodating groove (15) and extends.

8. The multi-lumen PICC catheter sealing tube device according to claim 7, characterized in that: The ratchet wheel (26) comprises ratchet teeth (261) arranged on its surface, and a second gear (262) arranged on the outer edge of the ratchet wheel (26).

9. The multi-lumen PICC catheter sealing tube device according to claim 8, characterized in that: Also included is an injection unit (3), comprising a plurality of needle-free syringes (31), a plurality of positive pressure connectors (32), a Y-shaped catheter (33), and a connection block (34); The connecting block (34) can fix a plurality of the positive pressure connectors (32) at the same time and cooperate with the inside of the plug-in box (11).

10. The multi-lumen PICC catheter sealing tube device according to claim 9, characterized in that: It also includes a pair of sealing covers (4) arranged on both sides of the supporting bridge (110).

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