High-pressure injection pump

Abstract

A high-pressure injection pump, comprising an injection pump body (1), a waste liquid recovery unit (4), and a loosening compensation unit (5). The loosening compensation unit (5) is arranged at a joint between a docking pipe head (412) and a waste liquid pipe (411). The loosening compensation unit (5) comprises a positioning ring (51), a stacked monitoring ring, and a guide rod (52). The positioning ring (51) is fixedly connected to an end portion of the docking pipe head (412). A rigid ring sleeve (53) is arranged on the outer surface of the waste liquid pipe (411). The stacked monitoring ring comprises a fixed pipe ring (54) and an outer sleeve ring (55) which are sleeved on the rigid ring sleeve (53). The fixed pipe ring (54) is fixed to the rigid ring sleeve (53), and the outer sleeve ring (55) is located on one side of the fixed pipe ring (54) distal to the docking pipe head (412). A first end of the guide rod (52) is fixedly connected to the positioning ring (51), and a second end of the guide rod (52) passes through the fixed pipe ring (54) and is fixedly connected to the outer sleeve ring (55). The fixed pipe ring (54) is configured to restrict the movement of the outer sleeve ring (55) so as to prevent loosening between the docking pipe head and the waste liquid pipe.

Description

High pressure injection pump

[0001] The present application claims priority to the Chinese patent application No. 202411047526.5 filed on August 01, 2024, and the Chinese patent application No. 202510726877.7 filed on June 03, 2025, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of injection pump, for example, to a high pressure injection pump. BACKGROUND

[0003] As an auxiliary device in the radiology diagnosis and treatment system, the high pressure injection pump is gradually applied in the clinic with the development of X-ray, rapid film changer, image intensifier and artificial contrast medium technology. The basic function of the high pressure injection pump is to inject a sufficient amount of high concentration X-ray contrast medium into the examination site quickly and accurately through percutaneous puncture into the blood vessel or through the original hole of the human body within a certain time, so as to perform diagnostic contrast and treatment on the lesion site.

[0004] The conventional high pressure injection pump is provided with a clamping port, and a clamping connector at the clamping port can be quickly connected with an external pipe to realize contrast medium supply. When the high pressure injection pump is cleaned, a waste liquid pipe can also be connected with the clamping connector to realize backwashing.

[0005] However, the liquid pressure fluctuates greatly during backwashing, and the connection between the waste liquid pipe and the clamping connector is close to the waste liquid outlet. Especially when the liquid pressure is high, the waste liquid pipe and the clamping connector are prone to loosen and even separate, which may cause the waste liquid to be directly sprayed out, and there is a great safety hazard, and the continuous and stable backwashing process is affected. SUMMARY

[0006] The present application provides

[0007] A high pressure injection pump, comprising an injection pump body, a waste liquid recovery unit and a looseness compensation unit, wherein:

[0008] The injection pump body is provided with a quick clamping structure, and the quick clamping structure is provided with a clamping port;

[0009] The waste liquid recovery unit comprises a recovery pipeline, and the recovery pipeline comprises a waste liquid pipe and a butt joint connector provided at a first end of the waste liquid pipe, and the butt joint connector is butt jointed with the clamping port;

[0010] The loosening compensation unit is arranged at the connection between the butt joint pipe head and the waste liquid pipe. The loosening compensation unit comprises a positioning ring, a laminated monitoring ring and a guide rod. The positioning ring is fixedly connected with the end of the butt joint pipe head. The outer surface of the waste liquid pipe is provided with a hard ring sleeve. The laminated monitoring ring comprises a pipe fixing ring and an outer sleeve ring, which are sleeved on the hard ring sleeve. The pipe fixing ring is fixed with the hard ring sleeve. The outer sleeve ring is located on the side of the pipe fixing ring away from the butt joint pipe head. The first end of the guide rod is fixedly connected with the positioning ring. The second end of the guide rod penetrates through the pipe fixing ring and is fixedly connected with the outer sleeve ring. The pipe fixing ring is arranged to limit the movement of the outer sleeve ring, so as to prevent the loosening of the butt joint pipe head and the waste liquid pipe. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is a schematic diagram of the overall structure of the high-pressure injection pump according to the first embodiment of the present application;

[0012] Fig. 2 is a schematic diagram of the structure of the waste liquid recovery unit according to the first embodiment of the present application;

[0013] Fig. 3 is a schematic diagram of the structure of a recovery pipeline according to the first embodiment of the present application;

[0014] Fig. 4 is a schematic diagram of the structure of another recovery pipeline according to the first embodiment of the present application;

[0015] Fig. 5 is a schematic diagram of the structure of the loosening compensation unit according to the first embodiment of the present application;

[0016] Fig. 6 is a sectional view of the loosening compensation unit according to the first embodiment of the present application;

[0017] Fig. 7 is a schematic diagram of the connection between the waste liquid pipe and the butt joint pipe port according to the second embodiment of the present application;

[0018] Fig. 8 is a sectional view of the sandwiched compensation ring according to the second embodiment of the present application;

[0019] Fig. 9 is a sectional view of the laminated monitoring ring according to the second, third and fourth embodiments of the present application;

[0020] Fig. 10 is a schematic diagram of the reverse compensation of loosening according to the third embodiment of the present application;

[0021] Fig. 11 is a sectional view of the guide rod according to the fourth embodiment of the present application;

[0022] Fig. 12 is a schematic diagram of the quick clamping structure according to the fifth embodiment of the present application;

[0023] Fig. 13 is a side view of the shell of the quick clamping structure according to the fifth embodiment of the present application;

[0024] Fig. 14 is a side view of the back plate of the quick clamping structure according to the fifth embodiment of the present application;

[0025] Fig. 15 is a schematic view of the back plate removed from the quick clamping structure according to the fifth embodiment of the present application;

[0026] Fig. 16 is a schematic view of the clamping joint connected to the external pipe according to the fifth embodiment of the present application;

[0027] Fig. 17 is a schematic view of the structure of the plug-in detection unit according to the sixth embodiment of the present application;

[0028] Fig. 18 is a sectional view of the liquid leakage monitor according to the seventh embodiment of the present application;

[0029] Fig. 19 is an end view of the liquid leakage monitor according to the seventh embodiment of the present application;

[0030] Fig. 20 is a schematic view of the structure of the monitoring pipe according to the seventh embodiment of the present application;

[0031] Fig. 21 is a schematic view of the monitoring pipe with the cover removed according to the seventh embodiment of the present application;

[0032] Fig. 22 is a schematic view of the deformation of the monitoring pipe when liquid leakage occurs according to the seventh embodiment of the present application;

[0033] In the drawings: 1, injection pump body; 2, control terminal; 3, quick clamping structure; 31, shell; 311, clamping port; 312, connecting seat; 32, back plate; 33, chuck platform; 331, chuck groove; 34, elastic reset assembly; 341, positioning seat; 342, elastic telescopic rod; 35, clamping disc; 36, clamping joint; 361, tapered head pipe; 362, locking head; 37, L-shaped bracket; 371, pipe holding groove; 372, air sensor; 38, sliding plate; 381, round hole; 382, horizontal hole; 39, signal switch; 4, waste liquid recovery unit; 41, recovery pipeline; 411, waste liquid pipe; 412, butt joint pipe head; 413, liquid discharge head; 414, support; 42, waste liquid barrel; 43, waste liquid bag; 44, liquid guide pipe; 5, loosening compensation unit; 51, positioning ring; 52, guide rod; 521, liquid guiding port; 522, force-induced color change coating; 53, hard ring sleeve; 531, annular groove; 54, pipe positioning ring; 541, annular insert piece groove; 55, sleeve ring; 551, first pre-compensation ring body; 552, second pre-compensation ring body; 553, electric push rod; 56, magnetic dynamic insert piece; 57, external control ring; 58, interlayer compensation ring; 581, elastic ring; 582, elastic hollow capsule; 583, magnetorheological fluid; 584, pressure sensor; 6, plug-in detection unit; 61, positioning contact block; 611, detection hole; 62, U-shaped moving contact block; 63, plug rod; 64, elastic pressure detector; 7, liquid leakage monitor; 71, infrared range finder; 72, liquid collecting shell; 73, liquid collecting hole; 74, monitoring pipe; 741, hard pipe; 742, float change pipe; 7421, upper positioning layer; 7422, lower change layer; 743, cover cylinder; 744, pipe sleeve ring; 745, connecting rope; 746, light floating ball. DETAILED DESCRIPTION

[0034] Example One

[0035] The embodiment provides a high-pressure injection pump with a waste liquid recovery function, please refer to figure 1, the high-pressure injection pump includes injection pump body 1 and the control terminal 2 located at one side of injection pump body 1, the data line is connected between control terminal 2 and injection pump body 1, the back of control terminal 2 is also connected with the power line;Quick clamping structure 3 is arranged on injection pump body 1, clamping port 311 and connecting seat 312 are arranged on quick clamping structure 3, waste liquid recovery unit 4 is docked at clamping port 311, as shown in figure 1-2, waste liquid recovery unit 4 includes recovery pipeline 41, waste liquid barrel 42 connected with connecting seat 312 and waste liquid bag 43 hung on injection pump body 1 through a rope, the discharge end of recovery pipeline 41 is opposite to waste liquid barrel 42, the bottom of waste liquid barrel 42 is communicated with waste liquid bag 43 through liquid guide pipe 44, when back flushing is carried out on injection pump body 1, the internal waste liquid is discharged along recovery pipeline 41 into waste liquid barrel 42, and then enters waste liquid bag 43 along liquid guide pipe 44, realizing the recovery of waste liquid.

[0036] As shown in figure 3, recovery pipeline 41 includes waste liquid pipe 411 and docking pipe head 412 arranged at the first end of waste liquid pipe 411, docking pipe head 412 is docked with clamping port 311, the second end of waste liquid pipe 411 is provided with discharge head 413, and support 414 extending downward is arranged on docking pipe head 412, and discharge head 413 is installed on support 414. As shown in figure 1-2, connecting seat 312 is located at the bottom of quick clamping structure 3, loose compensation unit 5 is arranged at the connection of docking pipe head 412 and waste liquid pipe 411, through the arrangement of loose compensation unit 5, loose abnormality can be monitored in time when loose occurs, and sealing compensation can be carried out according to loose, so as to inhibit the expansion of loose, so as to maintain the stable performance of high-pressure injection pump back flushing process.

[0037] Here, waste liquid pipe 411 is spring spiral, which can also be natural long U shape (as shown in figure 4), in specific implementation, appropriate shape can be selected according to needs, and the length of waste liquid pipe 411 is much greater than the vertical distance between docking pipe head 412 and discharge head 413, the length of waste liquid pipe 411 is relatively long, mainly for pressure reduction buffer, so that the pressure of waste liquid is relatively small after flowing through the long path, and then when it falls into waste liquid barrel 42, it is not easy to appear excessive injection, reducing the occurrence of waste liquid splashing.

[0038] As shown in Figures 5 and 6, the loosening compensation unit 5 includes a positioning ring 51, a stacking monitoring ring, and a guide rod 52. The positioning ring 51 is fixedly connected to the end of the connecting pipe 412. A rigid ring sleeve 53 is provided on the outer surface of the waste liquid pipe 411. The stacking monitoring ring includes a fixed pipe ring 54 and an outer ring 55 sleeved on the rigid ring sleeve 53. The fixed pipe ring 54 is fixed to the rigid ring sleeve 53. The outer ring 55 is located on the side of the fixed pipe ring 54 away from the connecting pipe 412. The first end of the guide rod 52 is fixedly connected to the positioning ring 51. The second end of the guide rod 52 passes through the fixed pipe ring 54 and is fixedly connected to the outer ring 55. The fixed pipe ring 54 is configured to restrict the movement of the outer ring 55 to prevent the connecting pipe 412 from loosening with the waste liquid pipe 411.

[0039] In some embodiments, the surface of the rigid ring 53 is provided with an annular groove 531, and the surface of the fixed tube ring 54 that abuts against the rigid ring 53 is provided with an annular insert groove 541. The annular groove 531 and the annular insert groove 541 are radially aligned. A plurality of magnetic inserts 56 are provided in the annular insert groove 541. The plurality of magnetic inserts 56 are circumferentially distributed and can switch between a first position and a second position. In the first position, the magnetic inserts 56 are partially exposed in the annular insert groove 541 and inserted into the annular groove 531, thereby locking the fixed tube ring 54 with the rigid ring 53. In the second position, the magnetic inserts 56 are completely retracted into the annular insert groove 541, thereby unlocking the fixed tube ring 54 from the rigid ring 53.

[0040] To achieve the position switching of the magnetic insert 56, an outer control ring 57 is provided on the outer sleeve of the stacked monitoring ring. The outer control ring 57 can switch between the surface of the fixed tube ring 54 and the surface of the outer sleeve ring 55. The outer control ring 57 and the annular groove 531 respectively form a magnetic attraction force on the magnetic insert 56. When the outer control ring 57 is on the surface of the fixed tube ring 54, the magnetic attraction force on the magnetic insert 56 is greater than the magnetic attraction force on the magnetic insert 56 of the annular groove 531, so that the magnetic insert 56 is in the second position. When the outer control ring 57 is on the surface of the outer sleeve ring 55, the magnetic attraction force on the magnetic insert 56 is less than the magnetic attraction force on the magnetic insert 56 of the annular groove 531, so that the magnetic insert 56 is in the first position.

[0041] In use, the outer control ring 57 can be moved to the surface of the fixed pipe ring 54 to attract multiple magnetic inserts 56, which will then retract into the annular insert groove 541. Then, the waste liquid pipe 411 can be passed through the stacked monitoring ring and properly connected to the connecting pipe 412. After the waste liquid pipe 411 is connected to the connecting pipe 412, the outer control ring 57 can be moved to the surface of the outer ring 55 again. At this time, without the restraint of the outer control ring 57, the multiple magnetic inserts 56 will move quickly towards the center of the ring under the magnetic attraction of the annular groove 531 and then be stuck in the annular groove 531, so that the stacked monitoring ring and the waste liquid pipe 411 are combined into one unit.

[0042] In this embodiment, the lateral span of the outer control ring 57 is smaller than that of the outer sleeve ring 55, allowing the outer control ring 57 to be completely misaligned with the fixed pipe ring 54, thus not affecting the movement of the magnetic insert 56 toward the annular groove 531. Furthermore, the radial length of the magnetic insert 56 is consistent with the depth of the annular insert groove 541, and the depth of the annular groove 531 is less than the depth of the annular insert groove 541. This ensures that both ends of the magnetic insert 56 can be simultaneously located within both the annular insert groove 541 and the annular groove 531, resulting in a better effect of temporarily integrating the waste liquid pipe 411 with the stacked monitoring ring.

[0043] Example 2:

[0044] This embodiment provides a high-pressure injection pump, including an injection pump body 1, a waste liquid recovery unit 4, and a loosening compensation unit 5. The injection pump body 1 is provided with a quick-clamping structure 3, which has a clamping port 311. The waste liquid recovery unit 4 includes a recovery pipeline 41, which includes a waste liquid pipe 411 and a connecting pipe 412 disposed at the first end of the waste liquid pipe 411. The connecting pipe 412 is connected to the clamping port 311. The loosening compensation unit 5 is disposed at the connection between the connecting pipe 412 and the waste liquid pipe 411. The loosening compensation unit 5 includes a positioning ring 51, a stacked monitoring ring, and a guide ring. The guide rod 52, the positioning ring 51 and the end of the connecting pipe 412 are fixedly connected. The outer surface of the waste liquid pipe 411 is provided with a rigid ring sleeve 53. The stacked monitoring ring includes a fixed pipe ring 54 and an outer ring 55 sleeved on the rigid ring sleeve 53. The fixed pipe ring 54 is fixed to the rigid ring sleeve 53. The outer ring 55 is located on the side of the fixed pipe ring 54 away from the connecting pipe 412. The first end of the guide rod 52 is fixedly connected to the positioning ring 51. The second end of the guide rod 52 passes through the fixed pipe ring 54 and is fixedly connected to the outer ring 55. The fixed pipe ring 54 is set to restrict the movement of the outer ring 55 to prevent the connecting pipe 412 and the waste liquid pipe 411 from loosening.

[0045] In some embodiments, the stacked monitoring ring further includes a sandwich compensation ring 58 disposed between the fixed tube ring 54 and the outer ring 55. The sandwich compensation ring 58 includes an outer elastic ring 581 and an inner elastic hollow bladder 582, as shown in Figures 8 and 9. The elastic hollow bladder 582 is filled with magnetorheological fluid 583, and a pressure sensor 584 is disposed on the inner wall of the elastic hollow bladder 582 near the outer ring 55. The outer ring 55 is made of an electromagnetic material. When the pressure sensor 584 detects that the sandwich compensation ring 58 is squeezed, the magnetorheological fluid 583 hardens due to the magnetic field generated by the energization of the outer ring 55, thereby preventing the outer ring 55 from moving toward the fixed tube ring 54.

[0046] For example, when the connection between the waste liquid pipe 411 and the connecting pipe 412 becomes loose, as shown in Figure 7, under hydraulic action, the waste liquid pipe 411 moves away from the connecting pipe 412. At this time, the fixed pipe ring 54 moves accordingly, while the outer ring 55 remains stationary due to the restriction of the guide rod 52. At this time, the elastic interlayer compensation ring 58 is squeezed, which triggers the internal pressure sensor 584, resulting in a large data change. At this time, the control terminal 2 can control the outer ring 55 to be energized, so that the magnetorheological fluid 583 in the interlayer compensation ring 58 hardens, making it difficult for it to move laterally, thereby inhibiting the continued movement of the waste liquid pipe 411 and effectively preventing the loosening from expanding.

[0047] Example 3:

[0048] This embodiment provides a high-pressure injection pump. Based on Embodiment 2, to improve the sealing of loose locations, as shown in Figures 9 and 10, the outer ring 55 includes a first pre-compensation ring 551, a second pre-compensation ring 552, and multiple electric push rods 553 installed between the first pre-compensation ring 551 and the second pre-compensation ring 552. The first pre-compensation ring 551 and the second pre-compensation ring 552 abut against each other. The second pre-compensation ring 552 is located on the side of the first pre-compensation ring 551 near the interlayer compensation ring 58. The first pre-compensation ring 551 is fixed to the guide rod 52, and the second pre-compensation ring 552 can move along the guide rod 52. When the interlayer compensation ring 58 is compressed, the electric push rods drive the second pre-compensation ring 552 away from the first pre-compensation ring 551, causing the waste liquid pipe 411 to move towards the connecting pipe head 412. After the interlayer compensation ring 58 hardens under the magnetic field, the control terminal 2 can continue to control the electric push rod 553 to start, driving the second pre-compensation ring 552 away from the first pre-compensation ring 551. The second pre-compensation ring 552 pushes the hardened interlayer compensation ring 58, the fixed pipe ring 54, and the waste liquid pipe 411 connected to the fixed pipe ring 54, so that the waste liquid pipe 411 moves towards the connecting pipe 412, realizing reverse compensation for loosening, so that the connection between the waste liquid pipe 411 and the connecting pipe 412 can be temporarily restored, and the sealing can also be restored, so that the backwashing process is not interrupted. The maintenance here can be carried out after backwashing, which is not likely to affect the continuity of the backwashing and effectively ensures the efficiency of backwashing.

[0049] Therefore, by setting a loosening compensation unit 5 at the connection between the connector 412 and the waste liquid pipe 411, when loosening occurs, the waste liquid pipe 411 will tend to move away from the connector 412. At this time, it will squeeze the loosening compensation unit 5, causing the loosening compensation unit 5 to deform. This will trigger the internal pressure sensor 584, thereby monitoring the loosening abnormality at the connection between the connector 412 and the waste liquid pipe 411 in real time. In addition, when the abnormality is detected, the deformation hardness of the magnetorheological fluid 583 in the interlayer compensation ring 58 can be controlled. The loosening compensation unit 5 can also perform a certain degree of self-separation and push the waste liquid pipe 411 in the reverse direction, thereby compensating for the loosening of the waste liquid pipe 411 and restoring the connection between the waste liquid pipe 411 and the connecting pipe 412. This achieves a sealing and self-compensating effect. Compared with related technologies, this allows the waste liquid to be stably recovered, making it less prone to leakage, and significantly improving the stability of the high-pressure injection pump during backwashing, effectively ensuring the continuous operation of the process.

[0050] Example 4:

[0051] This embodiment provides a high-pressure injection pump. Based on embodiment three, the guide rod 52 is improved, as shown in Figures 9 and 11. Here, the guide rod 52 is a rigid hollow transparent rod body, and the guide rod 52 is also filled with magnetorheological fluid 583. The guide rod 52 passes through the elastic hollow bladder 582, and the guide rod 52 is provided with a liquid inlet 521 that communicates with the inner cavity of the elastic hollow bladder 582. The inner wall of the guide rod 52 is coated with a mechanochromic coating 522. The mechanochromic coating 522 changes color when the interlayer compensation ring 58 is squeezed due to the increased pressure inside the guide rod 52.

[0052] When local loosening occurs, the interlayer compensation ring 58 is squeezed and slightly deformed, which causes some of the magnetorheological fluid 583 in the interlayer compensation ring 58 to enter the guide rod 52 along the liquid inlet 521, thereby increasing the pressure in the guide rod 52. At this time, the force-sensitive color-changing coating 522 is subjected to obvious extrusion force and changes color, which can intuitively reflect the loosening situation, facilitate timely manual intervention, improve safety, and further reduce the possibility of the waste liquid pipe 411 detaching from the connecting pipe joint 412.

[0053] In some embodiments, the force-sensitive color-changing coating 522 uses a reversible color-changing material so that the guide rod 52 can return to its normal transparent state after the loosening is dealt with.

[0054] Example 5:

[0055] This embodiment provides a high-pressure injection pump with an automatic clamping function. The high-pressure injection pump includes an injection pump body 1, on which a quick clamping structure 3 is provided. The quick clamping structure 3 is provided with a clamping port 311. Whether it is the waste liquid pipe 411 or the external pipe for supplying medicine, the connection head 412 of the waste liquid pipe 411 or the pipe connector of the external pipe can be quickly clamped onto the clamping port 311 of the injection pump body 1.

[0056] Please refer to Figures 12 to 16. This embodiment further designs the quick-clamping structure 3 in Embodiment 1. The quick-clamping structure 3 includes a shell 31 and a back plate 32 that are fixed to each other. The back plate 32 is fixed to the syringe pump body 1. A clamping platform 33 is provided on the side of the shell 31 away from the syringe pump body 1. An elastic reset assembly 34 is provided between the clamping platform 33 and the shell 31. Here, three sets of elastic reset assemblies 34 are used as an example. A clamping slot 331 is provided on the clamping platform 33. The clamping slot 331 is used to clamp waste liquid. The outer casing 31 is provided with a clamping plate 35, and a clamping connector 36 is inserted at the axis of the clamping plate 35. The first end of the clamping connector 36 passes through the back plate 32 and is connected to the inner pipe in the injection pump body 1. The second end of the clamping connector 36 is provided with a conical tube 361, which protrudes from the clamping plate 35 and forms a clamping opening 311. A rotatable locking head 362 is provided on the conical tube 361. The locking head 362 is configured to automatically lock the pipe connector of the connecting pipe head 412 or the outer pipe onto the conical tube 361.

[0057] In some embodiments, the elastic reset assembly 34 includes a plurality of positioning seats 341 fixed to the housing 31. An elastic telescopic rod 342 is provided in the positioning seat 341. The first end of the elastic telescopic rod 342 is connected to the card head platform 33. The second end of the elastic telescopic rod 342 passes through the positioning seat 341 and the housing 31 in sequence and abuts against the back plate 32.

[0058] To achieve stable clamping of the connector 412 or the outer pipe fitting with the clamping connector 36, an adaptive change is required at the joint. Taking a threaded connection as an example, the inner wall of the locking head 362 is provided with threads that mate with the connector 412 or the outer pipe fitting. The locking head 362 is driven to rotate by an electric motor. A printed circuit board (PCB) sensor is provided on the clamping plate 35, and a signal switch 39 is provided on the housing 31. The electric motor is configured to drive the locking head 362 to rotate in a first direction when the PCB sensor detects that the waste liquid pipe 411 or the outer pipe fitting is inserted into the clamping port 311, thereby locking the connector 412 or the outer pipe fitting. The signal switch 39 is configured to control the electric motor to drive the locking head 362 to rotate in a second direction opposite to the first direction when triggered, thereby unlocking the locking head 362 from the connector 412 or the outer pipe fitting.

[0059] In this embodiment, the rotation of the locking head 362 is driven by an electric motor, which is a mature related technology. For example, the locking head 362 is fixed with teeth, and the output shaft of the electric motor is fixed with a gear that matches the teeth, so that the drive can be realized. This will not be elaborated here.

[0060] For the operation of supplying medication using a high-pressure injection pump, an L-shaped bracket 37 is provided on the side of the elastic reset assembly 34 away from the injection pump body 1. The L-shaped bracket 37 has a support groove 371, and an air sensor 372 is installed on the side wall of the support groove 371. The air sensor 372 is configured to detect the presence of air inside the external connector. When an abnormality is detected, it can promptly remind the pump to stop, effectively preventing the injection pump body 1 from continuing to operate even when air is present in the external connector, thus improving safety. The L-shaped bracket 37 is detachable to avoid interference when connecting to the waste liquid pipe 411.

[0061] In some embodiments, the support slot 371, the chuck slot 331, and the clamping connector 36 are arranged coaxially. The clamping connector 36 is provided with an annular groove. A sliding plate 38 is slidably disposed on the side of the back plate 32 away from the outer shell 31. The sliding plate 38 has a through hole, which includes a circular hole 381 and a horizontal hole 382 communicating with the circular hole 381. The sliding direction of the sliding plate 38 is the same as the length direction of the horizontal hole 382. The inner diameter of the circular hole 381 is larger than the maximum outer diameter of the clamping connector 36, and the width of the horizontal hole 382 is smaller than the maximum outer diameter of the clamping connector 36 but larger than the bottom diameter of the annular groove. Thus, by switching the position of the sliding plate 38, the clamping connector 36 can be installed and removed from the clamping plate 35.

[0062] When operating the external pipe fitting clamping port 311, first, the external pipe is held in the support slot 371, then the pipe connector of the external pipe is clamped in the clamping head slot 331. Then, manually push the clamping head platform 33 towards the clamping plate 35 to bring the pipe connector of the external pipe closer to the clamping head 36. When the PCB sensor detects that the pipe connector has reached the clamping head 36, control the electric motor to rotate the locking head 362, thereby locking the pipe connector of the external pipe with the locking head 362, completing the pipe fitting operation. After the operation, when it is necessary to separate the external pipe from the clamping head 36, the signal switch 39 can be pressed directly to control the electric motor to reverse, thereby driving the locking head 362 to rotate in the opposite direction, releasing the clamping lock. At the same time, under the elastic reset action of the elastic telescopic rod 342, the clamping head platform 33 is pushed back to its original position, thereby separating the external pipe from the clamping head 36.

[0063] Example 6:

[0064] This embodiment provides a high-pressure injection pump. Based on embodiment five, the upper end of the injection pump body 1 is provided with multiple insertion and removal detection units 6, as shown in Figure 17. The insertion and removal detection unit 6 includes a positioning contact 61 fixed inside the top of the injection pump body 1, a U-shaped moving contact 62 located outside the injection pump body 1, and two insertion rods 63 fixedly connected to one end of the U-shaped moving contact 62 facing the positioning contact 61. The positioning contact 61 has two detection holes 611 respectively corresponding to the two insertion rods 63. The lower end of the positioning contact 61 is equipped with two elastic pressure detectors 64. The upper end of the elastic pressure detectors 64 movably passes through the detection holes 611 and extends into the detection holes 611. The two insertion rods 63 are respectively inserted into the two detection holes 611 and abut against the elastic pressure sensor 584.

[0065] The insertion / removal detection unit 6 is mainly configured to detect whether the syringe pump body 1 is being inserted or removed from the syringe bottle. Whether the bottle is inserted from top to bottom or removed from bottom to top, it will cause the U-shaped moving contact 62 to vibrate. This vibration will be transmitted to the insertion rod 63, causing the elastic pressure sensor 584, which is in contact with it, to also vibrate under force, resulting in a change in its data. Two adjacent data points corresponding to the insertion and removal of the bottle form a set of data. Based on whether two data changes occur on the elastic pressure sensor 584, it can be determined whether the insertion / removal operation has been performed. After detecting that the bottle has been completely removed and inserted, the system can automatically vent air and fill the connected external tubing with medication. This achieves a high degree of automation and reduces the reliance on manual labor. The specific details of how air is vented and how medication is filled are technical aspects and will not be elaborated here.

[0066] In some embodiments, the upper end of the elastic pressure sensor 584 is hemispherical, and the height of the elastic pressure sensor 584 extending into the detection hole 611 is not greater than the radius of the hemisphere. When the insertion rod 63 is inserted into the detection hole 611, the upper end of the elastic pressure sensor 584 can move downward to avoid contact with the insertion rod 63, so that the elastic pressure sensor 584 can stably generate force data.

[0067] In summary, this high-pressure injection pump can automatically lock the connection between the external inlet tube or waste liquid tube 411 and the clamping connector 36 through the quick clamping structure 3. When supplying liquid medicine, the insertion and removal detection unit 6 can automatically detect whether the operation of inserting or removing the medicine bottle has been performed, and automatically control subsequent operations such as venting, filling and preparing. Compared with conventional technology, it can effectively reduce the dependence on manual labor, make the connection accuracy higher, and reduce the probability of the connection not being in place.

[0068] Example 7:

[0069] This embodiment provides a high-pressure injection pump. Based on embodiment five, the high-pressure injection pump further includes a leak detector 7, as shown in Figures 18 and 19. The leak detector 7 includes an infrared rangefinder 71 mounted on the housing 31 and a liquid collection shell 72 disposed below the locking head 362. The bottom end of the locking head 362 has a liquid collection hole 73 communicating with the liquid collection shell 72. A monitoring tube 74 is disposed inside the liquid collection shell 72. The monitoring tube 74 is coaxially arranged with the infrared rangefinder 71. When there is no leakage, the infrared beam emitted by the infrared rangefinder 71 can stably penetrate the monitoring tube 74. When leakage occurs, the monitoring tube 74 deforms in the middle, causing the ranging value of the infrared rangefinder 71 to change.

[0070] This allows for timely detection of potential leaks, enabling the syringe pump to stop automatically and facilitating timely maintenance and adjustments by staff, thus reducing safety hazards.

[0071] In some embodiments, the upper opening of the liquid collection hole 73 is vertical on the side away from the outer casing 31, and the upper opening of the liquid collection hole 73 is inclined on the side near the outer casing 31. The span of the inclined edge is 2 to 5 times that of the vertical edge, so that when leakage occurs, the liquid can be smoothly guided into the liquid collection hole 73 and flow into the liquid collection shell 72 for temporary storage. This allows the liquid to be used for leakage monitoring, and at the same time, the leaked liquid is less likely to drip down along the end of the clamping joint 36, reducing the difficulty of subsequent cleaning.

[0072] In some embodiments, as shown in Figures 20 and 21, the monitoring tube 74 includes two rigid tubes 741 and a float tube 742 connecting the two rigid tubes 741. The float tube 742 is covered by a cover 743. The lower inner walls of both ends of the cover 743 are simultaneously fixed to the two rigid tubes 741. A tube sleeve ring 744 is fitted in the middle of the float tube 742. A connecting rope 745 is provided on the tube sleeve ring 744. The connecting rope 745 passes through the cover 743 and is connected to a light buoy 746. When leakage occurs, the light buoy 746 floats up and pulls the float tube 742 upward, causing the float tube 742 to deform.

[0073] In some embodiments, the floating transformer 742 includes an upper fixed layer 7421 and a lower transformer layer 7422 that are combined vertically. The lower transformer layer 7422 is a flexible body. Both ends of the lower transformer layer 7422 and the upper fixed layer 7421 are respectively fixed to the ends of two rigid tubes 741. The combined surface of the lower transformer layer 7422 and the upper fixed layer 7421 is higher than the central axis of the rigid tube 741. After deformation, the lower transformer layer 7422 can block the infrared beam of the infrared rangefinder 71, as shown in Figure 22.

[0074] In this embodiment, the cover 743 supports the flexible lower variable layer 7422 and restricts the direction of the connecting rope 745 after leakage, allowing it to exert an upward vertical force on the sleeve ring 744, causing the lower variable layer 7422 to be lifted and deformed. For example, the sleeve ring 744 is fitted around the middle of the float variable tube 742. When leakage occurs, the leaked liquid flows along the collection hole 73 and eventually enters the liquid collection shell 72. As the liquid level rises, the light buoy 746 floats upward under the buoyancy of the liquid, gradually exerting an upward pulling force on the sleeve ring 744. As the liquid level rises higher, the lower variable layer 7422 is compressed and deformed upward by the sleeve ring 744, preventing the infrared beam emitted by the infrared rangefinder 71 from passing smoothly through the monitoring tube 74, thereby achieving leakage monitoring.

[0075] Both the buoy 746 and the sleeve ring 744 are made of lightweight plastic material. The buoy 746 is hollow. When there is no leakage, the buoy 746 is located at the bottom of the liquid-gathering shell 72, and the connecting rope 745 is in a slack state. The inner wall of the cover 743 does not contact the upper surface of the rigid tube 741, and the distance between the two is not less than the diameter of the rigid tube 741. When the connecting rope 745 is stretched upward, the buoy 746 is not higher than the upper end of the liquid-gathering shell 72, so that it can be monitored in time when leakage just begins. The staff has enough reaction time to deal with the situation, so that the liquid is not likely to overflow outside the clamping joint 36 before treatment.

[0076] The lower variable layer 7422 is made of a lightweight, sealed, flexible material in a relaxed state, which allows it to deform upwards when subjected to force, while the buoyancy of the light buoy 746 is sufficient to cause it to deform.

[0077] Therefore, with the leakage detector 7 installed, this embodiment can monitor the interface between the external pipe and the clamping connector 36 in real time. When leakage occurs, it can be detected in time and the operation can be stopped, effectively avoiding the situation where the injection volume of contrast fluid is lower than expected. At the same time, it facilitates the staff to perform corresponding operations in a timely manner, effectively reducing the safety hazards caused by leakage.

Claims

1. A high-pressure injection pump, comprising an injection pump body (1), a waste liquid recovery unit (4) and a loosening compensation unit (5), wherein: a quick clamping structure (3) is arranged on the injection pump body (1), and a clamping opening (311) is arranged on the quick clamping structure (3); the waste liquid recovery unit (4) comprises a recovery pipeline (41), the recovery pipeline (41) comprises a waste liquid pipe (411) and a butt joint pipe head (412) arranged at a first end of the waste liquid pipe (411), and the butt joint pipe head (412) is butt jointed with the clamping opening (311); and the loosening compensation unit (5) is arranged at a connection position of the butt joint pipe head (412) and the waste liquid pipe (411), and comprises a positioning ring (51), a laminated monitoring ring and a guide rod (52), the positioning ring (51) is fixedly connected with an end of the butt joint pipe head (412), an outer surface of the waste liquid pipe (411) is provided with a hard ring sleeve (53), the laminated monitoring ring comprises a pipe fixing ring (54) and an outer sleeve ring (55) sleeved on the hard ring sleeve (53), the pipe fixing ring (54) is fixed with the hard ring sleeve (53), the outer sleeve ring (55) is located on a side of the pipe fixing ring (54) away from the butt joint pipe head (412), a first end of the guide rod (52) is fixedly connected with the positioning ring (51), a second end of the guide rod (52) penetrates through the pipe fixing ring (54) and is fixedly connected with the outer sleeve ring (55), and the pipe fixing ring (54) is arranged to limit the movement of the outer sleeve ring (55) so as to prevent the butt joint pipe head (412) from loosening with the waste liquid pipe (411). The laminated monitoring ring further comprises a clamping layer compensation ring (58) arranged between the pipe fixing ring (54) and the outer sleeve ring (55), the clamping layer compensation ring (58) comprises an elastic ring (581) of an outer layer and an elastic hollow capsule (582) of an inner layer, the elastic hollow capsule (582) is filled with a magneto-rheological fluid (583), a pressure sensor (584) is arranged on an inner wall of the elastic hollow capsule (582) close to the outer sleeve ring (55), and the outer sleeve ring (55) is made of an electromagnetic material; when the pressure sensor (584) detects that the clamping layer compensation ring (58) is pressed, the magneto-rheological fluid (583) is hardened due to a magnetic field generated by energization of the outer sleeve ring (55) so as to prevent the outer sleeve ring (55) from moving towards the pipe fixing ring (54). ​ 2. The high pressure syringe pump of claim 1, wherein, ​ ​ 3. The high pressure syringe pump of claim 2, wherein, The outer sleeve ring (55) comprises a first pre-compensation ring body (551), a second pre-compensation ring body (552), and a plurality of electric push rods (553) mounted between the first pre-compensation ring body (551) and the second pre-compensation ring body (552), the first pre-compensation ring body (551) and the second pre-compensation ring body (552) abut each other, the second pre-compensation ring body (552) is located on the side of the first pre-compensation ring body (551) close to the interlayer compensation ring (58), the first pre-compensation ring body (551) is fixed with the guide rod (52), and the second pre-compensation ring body (552) can move along the guide rod (52); The electric push rod (553) drives the second pre-compensation ring body (552) to move away from the first pre-compensation ring body (551) when the interlayer compensation ring (58) is extruded, so that the waste liquid pipe (411) moves towards the butt joint pipe head (412).

4. The high pressure syringe pump of claim 2, wherein, The guide rod (52) is a hard hollow transparent rod, the guide rod (52) is also filled with the magneto-rheological fluid (583), the guide rod (52) penetrates through the elastic hollow capsule (582), the guide rod (52) is provided with a liquid inlet (521) in communication with the inner cavity of the elastic hollow capsule (582), and the inner wall of the guide rod (52) is coated with a force-induced color change coating (522), the force-induced color change coating (522) changes color due to the increase of the pressure in the guide rod (52) when the interlayer compensation ring (58) is extruded.

5. The high pressure syringe pump of claim 4, wherein, The force-induced color change coating (522) adopts a reversible color change material.

6. The high pressure syringe pump of claim 1, wherein, The surface of the hard ring sleeve (53) is provided with an annular groove (531), the surface of the pipe fixing ring (54) abutting against the hard ring sleeve (53) is provided with an annular insert groove (541), the annular groove (531) and the annular insert groove (541) are radially aligned, a plurality of magnetic dynamic inserts (56) are arranged in the annular insert groove (541), and the magnetic dynamic inserts (56) can be switched between a first position and a second position. The magnetic dynamic inserts (56) partially expose the annular insert groove (541) and are inserted into the annular groove (531) in the first position, so that the pipe fixing ring (54) is locked with the hard ring sleeve (53). The magnetic dynamic inserts (56) are completely retracted into the annular insert groove (541) in the second position, so that the pipe fixing ring (54) is unlocked with the hard ring sleeve (53).

7. The high pressure syringe pump of claim 6, wherein, The laminated monitoring ring is provided with an outer control ring (57), the outer control ring (57) can be switched between the surface of the pipe fixing ring (54) and the surface of the outer sleeve ring (55), the outer control ring (57) and the annular groove (531) form magnetic attraction forces on the magnetic dynamic inserts (56) respectively; When the outer control ring (57) is on the surface of the pipe fixing ring (54), the magnetic attraction force of the outer control ring (57) on the magnetic dynamic inserts (56) is greater than the magnetic attraction force of the annular groove (531) on the magnetic dynamic inserts (56), so that the magnetic dynamic inserts (56) are in the second position. The magnetic attraction of the outer control ring (57) to the magnetic moving insert piece (56) is less than the magnetic attraction of the annular groove (531) to the magnetic moving insert piece (56) when the outer control ring (57) is on the surface of the sleeve ring (55), so that the magnetic moving insert piece (56) is in the first position.

8. The high pressure syringe pump of claim 1, wherein, A second end of the waste liquid pipe (411) is provided with a liquid discharge head (413), the docking pipe head (412) is provided with a support (414) extending downward, the liquid discharge head (413) is installed on the support (414), a bottom of the quick clamping structure (3) is provided with a connecting seat (312), the waste liquid recovery unit (4) further comprises a waste liquid barrel (42) clamped with the connecting seat (312) and a waste liquid bag (43) hung on the injection pump body (1) by a hanging rope, the liquid discharge head (413) faces the waste liquid barrel (42), and the bottom of the waste liquid barrel (42) and the waste liquid bag (43) are communicated through a liquid guide pipe (44).

9. The high pressure syringe pump of claim 1, wherein, The quick clamping structure (3) comprises a shell (31) and a back plate (32) fixed with each other, the back plate (32) is fixed against the injection pump body (1), and a side, away from the injection pump body (1), of the shell (31) is provided with a chuck platform (33), an elastic reset assembly (34) is arranged between the chuck platform (33) and the shell (31), the chuck platform (33) is provided with a chuck groove (331) formed therein, the chuck groove (331) is arranged to clamp the waste liquid pipe (411) or an external connecting pipe, the shell (31) is provided with a clamping disc (35), a clamping connector (36) is inserted at an axis of the clamping disc (35), a first end of the clamping connector (36) penetrates through the back plate (32) and is connected with an internal connecting pipe in the injection pump body (1), and a second end of the clamping connector (36) is provided with a tapered head pipe (361), the tapered head pipe (361) is exposed from the clamping disc (35) and forms the clamping opening (311), and the tapered head pipe (361) is provided with a rotatable locking head (362), the locking head (362) is arranged to automatically lock the pipe connector of the docking pipe head (412) or the external connecting pipe on the tapered head pipe (361).

10. The high pressure syringe pump of claim 9, wherein, A screw thread is arranged on an inner wall of the locking head (362) and matched with the pipe connector of the docking pipe head (412) or the external connecting pipe for screwing, the locking head (362) is driven to rotate by an electric motor, the clamping disc (35) is provided with a printed circuit board (PCB) sensor, and the shell (31) is provided with a signal switch (39). The electric motor is arranged to drive the locking head (362) to rotate in a first direction when the PCB sensor detects that the waste liquid pipe (411) or the external connecting pipe is inserted into the clamping opening (311), so that the locking head (362) locks the pipe connector of the docking pipe head (412) or the external connecting pipe. The signal switch (39) is arranged to control the electric motor to drive the locking head (362) to rotate in a second direction opposite to the first direction when triggered, so that the locking head (362) is unlocked from the docking pipe head (412) or the pipe joint of the external pipe.

11. The high pressure syringe pump of claim 9, wherein, The elastic reset assembly (34) comprises a plurality of positioning seats (341) fixed to the shell (31), an elastic telescopic rod (342) is arranged in the positioning seat (341), the first end of the elastic telescopic rod (342) is connected to the chuck platform (33), and the second end of the elastic telescopic rod (342) sequentially penetrates through the positioning seat (341) and the shell (31) and abuts against the back plate (32).

12. The high pressure syringe pump of claim 9, wherein, The L-shaped bracket (37) is arranged on the side of the elastic reset assembly (34) away from the injection pump body (1), the L-shaped bracket (37) is provided with a pipe holding groove (371), and the sidewall of the pipe holding groove (371) is provided with an air sensor (372); the air sensor (372) is arranged to detect whether there is air in the internal of the external pipe.

13. The high pressure syringe pump of claim 12, wherein, The pipe holding groove (371), the chuck groove (331) and the clamping joint (36) are coaxially arranged, the clamping joint (36) is provided with an annular clamping groove, the side surface of the back plate (32) away from the shell (31) is slidably provided with a sliding plate (38), the sliding plate (38) is provided with a pipe passing hole, the pipe passing hole comprises a circular hole (381) and a horizontal hole (382) in communication with the circular hole (381), the sliding direction of the sliding plate (38) is the same as the length direction of the horizontal hole (382), the inner diameter of the circular hole (381) is greater than the maximum outer diameter of the clamping joint (36), and the width of the horizontal hole (382) is less than the maximum outer diameter of the clamping joint (36) and greater than the groove bottom diameter of the annular clamping groove.

14. The high-pressure injection pump according to claim 9, further comprising a liquid leakage monitor (7), the liquid leakage monitor (7) comprising an infrared range finder (71) mounted on the shell (31) and a liquid collecting shell (72) arranged below the locking head (362), the bottom end of the locking head (362) being provided with a liquid collecting hole (73) in communication with the liquid collecting shell (72), and the liquid collecting shell (72) being provided with a monitoring pipe (74) arranged coaxially with the infrared range finder (71). When there is no liquid leakage, the infrared light beam emitted by the infrared range finder (71) can stably penetrate the monitoring pipe (74); When liquid leakage occurs, the monitoring pipe (74) is deformed in the middle, so that the distance measuring value of the infrared range finder (71) changes.

15. The high pressure syringe pump of claim 14, wherein, The upper hole edge of the liquid collecting hole (73) away from the side edge of the shell (31) is vertical, the upper hole edge of the liquid collecting hole (73) close to the side edge of the shell (31) is inclined, and the inclined edge span is 2-5 times the vertical edge span.

16. The high pressure syringe pump of claim 14, wherein, The monitoring pipe (74) comprises two hard pipes (741) and a floating pipe (742) connecting the two hard pipes (741), the floating pipe (742) is provided with a cover barrel (743), the lower inner wall of both ends of the cover barrel (743) is fixedly connected with the two hard pipes (741), the middle part of the floating pipe (742) is sleeved with a pipe sleeve ring (744), the pipe sleeve ring (744) is provided with a connecting rope (745), the connecting rope (745) passes through the cover barrel (743) and is connected with a light floating ball (746); When liquid leakage occurs, the light floating ball (746) floats upwards and pulls the floating pipe (742) upwards, so that the floating pipe (742) deforms.

17. The high pressure syringe pump of claim 16, wherein, The floating pipe (742) comprises an upper fixed layer (7421) and a lower variable layer (7422) combined in sequence, the lower variable layer (7422) is a flexible body, the two ends of the lower variable layer (7422) are fixedly connected with the end portions of the two hard pipes (741) respectively, the combined surface of the lower variable layer (7422) and the upper fixed layer (7421) is higher than the middle axis of the hard pipe (741), and the lower variable layer (7422) can block the infrared light beam of the infrared range finder (71) after deformation.

18. The high-pressure injection pump according to claim 1, further comprising a control terminal (2) located on one side of the injection pump body (1), and a data line connected between the control terminal (2) and the injection pump body (1).

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