High pressure syringe pump with waste liquid recycling function

Abstract

The application relates to a high-pressure injection pump with a waste liquid recycling function applied to the technical field of injection pump-related technologies, which is provided with a micro-elastic loosening compensation unit at the connection between a clamping joint and a waste liquid pipe. When loosening occurs, the micro-elastic loosening compensation unit will be slightly deformed, thereby realizing the effect of real-time monitoring of the loosening abnormality of the connection between the clamping joint and the waste liquid pipe. When the abnormality is monitored, the micro-elastic loosening compensation unit can be controlled to be denatured and hardened, thereby inhibiting the continuous loosening of the waste liquid pipe. Meanwhile, the loosening compensation unit can also be self-separated to a certain extent and reversely push the waste liquid pipe, thereby reversely compensating for the loosening of the waste liquid pipe, and further making the waste liquid pipe recover the connection with the clamping joint, thereby achieving the effect of sealing and self-compensation. Compared with the prior art, the waste liquid can be stably recycled, the leakage is not prone to occurring, and the stability during backwashing of the high-pressure injection pump is greatly improved, and the continuous process is effectively ensured.

Description

TECHNICAL FIELD

[0001] The application relates to a high-pressure injection pump with a waste liquid recycling function, in particular to a high-pressure injection pump with a waste liquid recycling function applied to the technical field of injection pumps. BACKGROUND

[0002] The high-pressure injection pump is an auxiliary device in a radiology diagnosis and treatment system, and is gradually applied in the clinic with the development of X-ray, rapid film changer, image intensifier and artificial contrast medium technologies. The basic function of the high-pressure injector 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 that diagnostic contrast and treatment of the lesion site can be performed.

[0003] The Chinese patent specification with the publication number CN118831217A discloses a high-pressure injection pump with a quick clamping structure. The automatic clamping unit is provided to automatically lock and connect the external pipe and the clamping joint. The plug detection unit is provided to automatically detect whether the plug operation is performed. The central processing unit can automatically control the exhaust, liquid filling and preparation operations after the external pipe is connected. Compared with the prior art, the dependence on manual operation is reduced, the pipe connection accuracy is higher, and the probability of pipe misplacement is reduced.

[0004] When the high-pressure injection pump is cleaned, the waste liquid pipe is also connected to the automatic clamping unit through the clamping pipe head. However, during backwashing, the liquid pressure fluctuates greatly. Although the part directly connected to the automatic clamping unit is not prone to liquid leakage, the connection between the waste liquid pipe and the clamping pipe head is close to the waste liquid outlet. When the liquid pressure is high, the waste liquid pipe and the clamping pipe head are prone to loosen and leak. In severe cases, the two may even separate, and the waste liquid may be directly sprayed out, which poses a great safety hazard and affects the continuity and stability of the backwashing process. SUMMARY

[0005] In view of the above prior art, the technical problem to be solved by the application is that the connection between the waste liquid pipe and the clamping pipe head is prone to loosen and leak due to the high pressure of the waste liquid during backwashing, which affects the continuity and stability of the backwashing process.

[0006] To solve the above problems, the application provides a high-pressure injection pump with waste liquid recovery function, which comprises a control terminal and an injection pump body, a data line is connected between the control terminal and the back of the injection pump body, the back of the control terminal is also connected with a power line, a quick clamping structure is installed at the side end of the injection pump body, a waste liquid recovery unit is arranged at the clamping opening of the quick clamping structure, the waste liquid recovery unit comprises a recovery pipeline connected with the clamping opening of the quick clamping structure, a waste liquid barrel located directly below the liquid discharge port of the recovery pipeline, and a waste liquid bag hung on the injection pump body by a rope, a connecting seat is fixedly connected to the lower end of the quick clamping structure, the waste liquid barrel is clamped with the connecting seat, a liquid guide pipe is fixedly connected between the bottom of the waste liquid barrel and the waste liquid bag, and the liquid discharge port of the recovery pipeline is located directly above the waste liquid barrel.

[0007] The recovery pipeline comprises a clamping connector connected with the clamping opening of the quick clamping structure, a waste liquid pipe clamped at one end of the clamping connector away from the quick clamping structure, and a liquid discharge head inserted at the lower end of the clamping connector, the liquid discharge head is fixedly connected with the end of the waste liquid pipe, and the opening of the liquid discharge head faces directly downward and is directly opposite the center of the waste liquid barrel.

[0008] A loosening compensation unit is arranged at the connection between the clamping connector and the waste liquid pipe, the loosening compensation unit comprises a positioning ring fixedly connected with the end of the clamping connector, a layered monitoring ring sleeved on the outer end of the waste liquid pipe, and a plurality of guide rods fixedly connected between the positioning ring and the layered monitoring ring, a hard ring sleeve is fixedly embedded on the outer end of the waste liquid pipe, the layered monitoring ring is clamped with the hard ring sleeve, and the hard ring sleeve is in mutual abutment with the inner wall close to the clamping connector.

[0009] In the high-pressure injection pump with waste liquid recovery function, the loosening compensation unit is arranged at the connection between the clamping connector and the waste liquid pipe, so that the loosening abnormality can be monitored when loosening occurs, and sealing compensation can be carried out according to the loosening, so as to inhibit the expansion of loosening and maintain the stable operation of the backwashing process of the high-pressure injection pump.

[0010] As a further improvement of the application, the waste liquid pipe is one of spiral shape and natural long U shape, and the length of the waste liquid pipe is much greater than the vertical distance between the clamping connector and the liquid discharge head.

[0011] As a further improvement of the application, along the direction away from the clamping connector, the layered monitoring ring comprises a pipe positioning ring, a layer compensation ring and an outer sleeve ring in sequence, the layer compensation ring is fixedly connected with the pipe positioning rings on both sides and the outer sleeve ring, and the plurality of guide rods are movably penetrated through the pipe positioning ring and the layer compensation ring and fixedly connected with the outer sleeve ring.

[0012] As a further improvement of the application, a ring groove is excavated in the inner part of the pipe positioning ring, a plurality of annular arrayed magnetic moving inserts are slidably connected in the ring groove, the hard ring sleeve is a T-shaped structure, a flat end of the hard ring sleeve is fixedly connected with a ring groove, and the ring groove is matched with the magnetic moving inserts.

[0013] As a further improvement of the application, the laminated monitoring ring is further sleeved with an outer control ring, the outer sleeve ring is fixedly connected and limited by the edge of the clamped joint, the outer control ring and the plurality of magnetic moving inserts have magnetic attraction force, the annular groove and the magnetic moving inserts also have magnetic attraction force, and the transverse span of the outer control ring is smaller than the transverse span of the outer sleeve ring and the interlayer compensation ring.

[0014] As a further improvement of the application, the interlayer compensation ring comprises an elastic ring of an outer layer and an elastic hollow capsule fixedly connected with the inner wall of the elastic ring, the elastic hollow capsule is saturatedly filled with magnetorheological fluid, the guide rod corresponds to the elastic ring, and the inner wall of the elastic hollow capsule close to the outer sleeve ring is further fixedly installed with a pressure sensor, and the pressure sensor is signal connected with the control terminal.

[0015] As a further improvement of the application, the outer sleeve ring is made of electromagnetic material, the outer sleeve ring comprises two mutually attached pre-compensation ring bodies and a plurality of electric push rods installed between the two pre-compensation ring bodies, and the elongated end of the electric push rod faces the clamped joint side, and the electric push rod is also signal connected with the control terminal.

[0016] As a further improvement of the application, the guide rod is movably penetrated through the pre-compensation ring body close to the clamped joint side and is fixedly connected with the other pre-compensation ring body, and the outer end of the guide rod is further fixedly connected with a liquid inlet, and the liquid inlet is fixedly penetrated through the elastic hollow capsule and extends into the inside thereof.

[0017] As a further improvement of the application, the guide rod is a hard hollow transparent structure, the inner wall of the guide rod is coated with a force-induced color change coating, and the magnetorheological fluid also saturates the guide rod.

[0018] As a further improvement of the application, the guide rod is movably penetrated through the pre-compensation ring body close to the clamped joint side and is fixedly connected with the other pre-compensation ring body, and the outer end of the guide rod is further fixedly connected with a liquid inlet, and the liquid inlet is fixedly penetrated through the elastic hollow capsule and extends into the inside thereof.

[0019] As a further improvement of the application, the guide rod is a hard hollow transparent structure, the inner wall of the guide rod is coated with a force-induced color change coating, and the magnetorheological fluid also saturates the guide rod.

[0020] In summary, by providing the micro-elastic loosening compensation unit at the connection between the clamping joint and the waste liquid pipe, when loosening occurs, the waste liquid pipe will have a tendency to move away from the clamping joint, at which time it will squeeze the loosening compensation unit, which will slightly deform, thereby triggering the internal pressure sensor, thereby achieving the effect of real-time monitoring of the loosening abnormality of the connection between the clamping joint and the waste liquid pipe. When the abnormality is detected, the micro-elastic loosening compensation unit can be controlled to harden, thereby making it difficult to continue to deform, so as to achieve the condition that the loosening range of the waste liquid pipe is expanded. At the same time, the loosening compensation unit can also be self-separated to a certain extent and push the waste liquid pipe in the opposite direction, thereby compensating for the loosening of the waste liquid pipe in the opposite direction, thereby restoring the connection between the waste liquid pipe and the clamping joint, thereby achieving the effect of sealing and self-compensation. Compared with the prior art, the waste liquid can be stably recovered, and leakage is less likely to occur, and the stability during backwashing of the high-pressure injection pump is greatly improved, effectively ensuring the continuous operation of the process. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a front perspective view of the first embodiment of the present application;

[0022] Figure 2 is a back perspective view of the first embodiment of the present application;

[0023] Figure 3 is a perspective view of part of the waste liquid recovery unit of the first embodiment of the present application when installed on the quick clamping structure;

[0024] Figure 4 is a side view of part of the waste liquid recovery unit of the first embodiment of the present application when installed on the quick clamping structure;

[0025] Figure 5 is a perspective view of the recovery pipeline of the first embodiment of the present application;

[0026] Figure 6 is an exploded view of the recovery pipeline of the first embodiment of the present application;

[0027] Figure 7 is a perspective view of the waste liquid pipe in the form of a long U-shaped in the recovery pipeline of the first embodiment of the present application;

[0028] Figure 8 is a perspective view of part of the loosening compensation unit of the first embodiment of the present application;

[0029] Figure 9 is a front cross-sectional view of part of the loosening compensation unit of the first embodiment of the present application;

[0030] Figure 10 is a schematic view of the connection between the waste liquid pipe and the clamping joint of the first embodiment of the present application when loosening occurs;

[0031] Figure 11 Front view of the interlayer compensation ring of the first embodiment of the present application;

[0032] Figure 12 Schematic diagram of the reverse compensation for loosening of the first embodiment of the present application;

[0033] Figure 13 Schematic diagram of the cross section of the layering monitoring ring of the first and second embodiments of the present application;

[0034] Figure 14 Top view of the guide rod of the second embodiment of the present application.

[0035] Explanation of the reference numerals in the figures:

[0036] 1 control terminal, 101 data line, 102 power line, 2 injection pump body, 3 quick clamping structure, 301 connecting seat, 4 recovery pipeline, 41 clamping joint, 42 waste liquid pipe, 43 liquid discharge head, 5 waste liquid barrel, 501 liquid guide pipe, 6 waste liquid bag, 7 loosening compensation unit, 71 positioning ring, 72 guide rod, 731 outer sleeve ring, 732 pipe positioning ring, 733 interlayer compensation ring, 701 annular groove, 702 electric push rod, 703 pressure sensor, 704 liquid inlet, 81 hard ring, 82 magnetic dynamic insert, 83 external control ring. DETAILED DESCRIPTION

[0037] The two embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0038] First embodiment:

[0039] Figures 1-2 A high-pressure injection pump with waste liquid recovery function is shown, which comprises a control terminal 1 and an injection pump body 2, a data line 101 is connected between the back of the control terminal 1 and the back of the injection pump body 2, and a power line 102 is also connected to the back of the control terminal 1. The side end of the injection pump body 2 is provided with a quick clamping structure 3, and a waste liquid recovery unit is arranged at the clamping opening of the quick clamping structure 3, such as Figures 3-4 The waste liquid recovery unit comprises a recovery pipeline 4 connected to the clamping opening of the quick clamping structure 3, a waste liquid barrel 5 located directly below the liquid discharge opening of the recovery pipeline 4, and a waste liquid bag 6 hung on the injection pump body 2 by a rope. The quick clamping structure 3 is fixedly connected with a connecting seat 301 at the lower end, the waste liquid barrel 5 is clamped with the connecting seat 301, and the bottom of the waste liquid barrel 5 is fixedly connected with a liquid guide pipe 501 with the waste liquid bag 6. The liquid discharge opening of the recovery pipeline 4 is located directly above the waste liquid barrel 5. When backwashing the injection pump, the internal waste liquid is discharged along the recovery pipeline 4, falls into the waste liquid barrel 5, and then enters the waste liquid bag 6 along the liquid guide pipe 501, realizing the recovery of the waste liquid.

[0040] AsFigures 5-6 The recovery pipeline 4 comprises a clamping joint 41 connected with the clamping opening of the quick clamping structure 3, a waste liquid pipe 42 clamped at the end of the clamping joint 41 away from the quick clamping structure 3, and a liquid discharge head 43 inserted at the lower end of the clamping joint 41. The clamping joint 41 is T-shaped, the liquid discharge head 43 corresponds to the lower end of the T-shaped structure, the liquid discharge head 43 is fixedly connected with the end of the waste liquid pipe 42, the opening of the liquid discharge head 43 faces directly downward and is directly opposite the center of the waste liquid barrel 5. A loosening compensation unit 7 is arranged at the connection between the clamping joint 41 and the waste liquid pipe 42. By arranging the loosening compensation unit 7 at the connection between the clamping joint 41 and the waste liquid pipe 42, loosening abnormalities can be monitored when loosening occurs, and sealing compensation can be performed for the loosening, so as to inhibit the expansion of the loosening and maintain the stable operation of the backwashing process of the high-pressure injection pump.

[0041] As Figures 6-7 The waste liquid pipe 42 is one of spiral shape and natural long U shape. In specific implementation, a suitable shape can be selected according to needs, and the length of the waste liquid pipe 42 is much greater than the vertical distance between the clamping joint 41 and the liquid discharge head 43. The length of the waste liquid pipe 42 is set to be relatively long, mainly for pressure reduction and buffering. After the waste liquid with high pressure flows through the long path, the pressure is relatively low, so that the waste liquid is not easy to be excessively sprayed when falling into the waste liquid barrel 5, and the splashing of the waste liquid is reduced.

[0042] As Figures 8-9, the loosening compensation unit 7 includes a positioning ring 71 fixedly connected with the end of the clamping joint 41, a layered monitoring ring sleeved on the outer end of the waste liquid pipe 42, and a plurality of guide rods 72 fixedly connected between the positioning ring 71 and the layered monitoring ring, the outer end of the waste liquid pipe 42 is fixedly inlaid with a hard ring sleeve 81, the layered monitoring ring is clamped with the hard ring sleeve 81, and the hard ring sleeve 81 is in mutual resistance with the inner wall close to the clamping joint 41, the inner pipe ring 732 is internally excavated with an annular groove 701, a plurality of annular array distributed magnetic moving inserts 82 are slidably connected in the annular groove 701, the hard ring sleeve 81 is a T-shaped structure, and the straight end of the hard ring sleeve 81 is fixedly connected with an annular groove, and the annular groove is matched with the magnetic moving insert 82, the layered monitoring ring is further sleeved with an outer control ring 83, the edge of the outer sleeve ring 731 away from the clamping joint 41 is fixedly connected with a limiting ring, and the outer control ring 83 and the plurality of magnetic moving inserts 82 have magnetic attraction force, in use, the outer control ring 83 can be moved to the outer end of the inner pipe ring 732 first, so as to adsorb the plurality of magnetic moving inserts 82, and then the waste liquid pipe 42 is inserted through the layered monitoring ring and normally clamped with the waste liquid pipe 42, when the two are connected, the outer control ring 83 can be moved again, so that the outer control ring 83 is away from the outer sleeve ring 731, at this time, the plurality of magnetic moving inserts 82 are quickly moved towards the inside under the magnetic attraction of the annular groove, and then clamped in the annular groove, so that the layered monitoring ring is temporarily integrated with the waste liquid pipe 42, when loosening occurs between the waste liquid pipe 42 and the clamping joint 41, the layered monitoring ring will change, so as to achieve the effect of loosening monitoring.

[0043] The annular groove and the magnetic moving insert 82 also have magnetic attraction force, and the transverse span of the outer control ring 83 is less than the transverse span of the outer sleeve ring 731 and the interlayer compensation ring 733, so that the outer control ring 83 can be completely dislocated with the inner pipe ring 732, so as not to affect the movement of the magnetic moving insert 82 towards the annular groove, in addition, the radial length of the magnetic moving insert 82 is consistent with the depth of the annular groove 701, and the depth of the annular groove is less than the depth of the annular groove 701, so as to effectively ensure that the two ends of the magnetic moving insert 82 can be located in the annular groove 701 and the annular groove at the same time, so that the effect of temporarily integrating the waste liquid pipe 42 and the layered monitoring ring is better.

[0044] In the direction away from the clamping joint 41, the layered monitoring ring sequentially includes the inner pipe ring 732, the interlayer compensation ring 733 and the outer sleeve ring 731, the outer sleeve ring 731 is made of electromagnetic material, the interlayer compensation ring 733 is fixedly connected with the two side inner pipe rings 732 and the outer sleeve ring 731, and the plurality of guide rods 72 are movably penetrated through the inner pipe ring 732 and the interlayer compensation ring 733 and fixedly connected with the outer sleeve ring 731, such as Figure 11The sandwich compensation ring 733 includes an outer elastic ring and an elastic hollow bladder fixedly connected to the inner wall of the elastic ring. The elastic hollow bladder is saturated with magnetorheological fluid, and the guide rod 72 corresponds to the elastic ring. A pressure sensor 703 is also fixedly installed on the inner wall of the elastic hollow bladder near the outer ring 731. The pressure sensor 703 is connected to the control terminal 1. When the connection between the waste liquid pipe 42 and the clamping connector 41 becomes loose, such as Figure 10 Under hydraulic pressure, the waste liquid pipe 42 moves away from the clamping joint 41. At this time, the fixed pipe ring 732 moves accordingly. However, due to the restriction of the guide rod 72, the outer ring 731 remains stationary. At this time, the elastic interlayer compensation ring 733 is squeezed, which triggers the internal pressure sensor 703, resulting in a large data change. At this time, the control terminal 1 can control the outer ring 731 to be energized, so that the magnetorheological fluid in the interlayer compensation ring 733 hardens, making it difficult for it to move laterally. This suppresses the continued movement of the waste liquid pipe 42 and effectively prevents the loosening from expanding.

[0045] like Figure 13 The outer ring 731 includes two pre-compensation rings that are attached to each other and a plurality of electric push rods 702 installed between the two pre-compensation rings. The extended ends of the electric push rods 702 face the clamping joint 41. The electric push rods 702 are also signal-connected to the control terminal 1. The guide rod 72 movably passes through the pre-compensation ring near the clamping joint 41 and is fixedly connected to the other pre-compensation ring. Figure 12 When the interlayer compensation ring 733 hardens under the magnetic field, the control terminal 1 can continue to control the electric push rod 702 to start. It will push the pre-compensation ring body near the clamping joint 41 in one direction, thereby pushing the hardened interlayer compensation ring 733, the fixed pipe ring 732 and the waste liquid pipe 42 connected to the fixed pipe ring 732. This will cause the waste liquid pipe 42 to move towards the clamping joint 41, realizing reverse compensation for loosening. This allows the connection between the waste liquid pipe 42 and the clamping joint 41 to be temporarily restored. Due to the contact, its sealing performance can also be restored, so that the backwashing process can be uninterrupted. Maintenance at this point can be carried out after backwashing, which is less likely to affect the continuity of the backwashing and effectively ensures the efficiency of backwashing.

[0046] In summary, by providing the micro-elastic loosening compensation unit 7 at the connection between the clamping joint 41 and the waste liquid pipe 42, when loosening occurs, the waste liquid pipe 42 will have a tendency to move away from the clamping joint 41, at which time it will extrude the loosening compensation unit 7, and the loosening compensation unit 7 will slightly deform accordingly, thereby triggering the internal pressure sensor, so as to realize the effect of real-time monitoring of the loosening abnormality of the connection between the clamping joint 41 and the waste liquid pipe 42. When the abnormality is monitored, the micro-elastic loosening compensation unit 7 can be controlled to harden, thereby making it difficult to continue to deform, so as to achieve the condition that the loosening range of the waste liquid pipe 42 expands. At the same time, the loosening compensation unit 7 can also perform a certain self-separation and reversely push the waste liquid pipe 42, thereby reversely compensating for the loosening of the waste liquid pipe 42, and thereby restoring the connection between the waste liquid pipe 42 and the clamping joint 41, thereby achieving the effect of sealing and self-compensation. Compared with the prior art, the waste liquid can be stably recovered, and the leakage condition is not prone to occur, and the stability during backwashing of the high-pressure injection pump is greatly improved, and the continuous process of the process is effectively ensured.

[0047] The second embodiment is as follows:

[0048] The present embodiment is further improved on the basis of the first embodiment, and the remaining parts remain consistent with the first embodiment.

[0049] As Figure 14 , Fig. a represents a force-induced color change coating, and the outer end of the guide rod 72 is also fixedly connected with a liquid inlet 704, the liquid inlet 704 fixedly penetrates the elastic hollow capsule and extends into the inside thereof, the guide rod 72 is a hard hollow transparent structure, and the guide rod 72 is coated with a force-induced color change coating on the inner wall, and the magnetorheological fluid also saturates and fills the guide rod 72. In the present embodiment, when local loosening occurs, the guide rod 72 moves away from the side of the clamping joint 41 along with the waste liquid pipe 42, and due to the limitation of the guide rod 72, the outer sleeve ring 731 and the interlayer compensation ring 733 cannot move along with it, resulting in that the interlayer compensation ring 733 is slightly deformed when being extruded, as Figure 13 , which will cause part of the magnetorheological fluid inside to move towards the guide rod 72 along the liquid inlet 704, thereby increasing the pressure in the guide rod 72, at which time the force-induced color change coating is obviously extruded and changes color. At this time, the on-site operator can immediately understand the loosening condition at this place, and timely manual intervention measures can be taken. Compared with the first embodiment, double operation is realized, the safety is improved, and the condition that the waste liquid pipe 42 is separated from the clamping joint 41 is further reduced.

[0050] It is worth noting that the force-induced color change coating is preferably a color-reversible coating.

[0051] The above-mentioned embodiments of the present application are combined with the current actual demand, the protection scope is not limited to this, various changes made within the knowledge range of the person skilled in the art without departing from the concept of the present application still fall within the protection scope of the present application.

Claims

1. A high-pressure injection pump with waste liquid recycling function, comprising a control terminal (1) and an injection pump body (2), a data line (101) is connected between the back surfaces of the control terminal (1) and the injection pump body (2), the back surface of the control terminal (1) is also connected with a power line (102), and a quick clamping structure (3) is installed at the side end of the injection pump body (2), characterized in that: The clamping port of the quick clamping structure (3) is provided with a waste liquid recovery unit, the waste liquid recovery unit comprises a recovery pipeline (4) connected with the clamping port of the quick clamping structure (3), a waste liquid barrel (5) located directly below the liquid outlet of the recovery pipeline (4), and a waste liquid bag (6) hung on the injection pump body (2) by a rope, the lower end of the quick clamping structure (3) is fixedly connected with a connecting seat (301), the waste liquid barrel (5) is clamped with the connecting seat (301), and a liquid guide pipe (501) is fixedly connected between the bottom of the waste liquid barrel (5) and the waste liquid bag (6). ​ The recovery pipeline (4) comprises a clamping connector (41) connected with the clamping port of the quick clamping structure (3), a waste liquid pipe (42) clamped at one end of the clamping connector (41) away from the quick clamping structure (3), and a liquid discharge head (43) inserted at the lower end of the clamping connector (41), the liquid discharge head (43) is fixedly connected with the end of the waste liquid pipe (42), and the mouth of the liquid discharge head (43) faces directly downward and is opposite to the center of the waste liquid barrel (5). A loosening compensation unit (7) is arranged at the connection between the clamping connector (41) and the waste liquid pipe (42), the loosening compensation unit (7) comprises a positioning ring (71) fixedly connected with the end of the clamping connector (41), a laminated monitoring ring sleeved on the outer end of the waste liquid pipe (42), and a plurality of guide rods (72) fixedly connected between the positioning ring (71) and the laminated monitoring ring, a hard ring sleeve (81) is fixedly embedded on the outer end of the waste liquid pipe (42), the laminated monitoring ring is clamped with the hard ring sleeve (81), and the hard ring sleeve (81) is in mutual friction with the inner wall close to the clamping connector (41). In the direction away from the clamping connector (41), the laminated monitoring ring comprises a pipe positioning ring (732), a layer compensation ring (733) and an outer sleeve ring (731) in sequence, the layer compensation ring (733) is fixedly connected with the pipe positioning ring (732) and the outer sleeve ring (731) on both sides, and a plurality of guide rods (72) are movably penetrated through the pipe positioning ring (732) and the layer compensation ring (733) and fixedly connected with the outer sleeve ring (731).

2. The high-pressure injection pump with waste liquid recovery function according to claim 1, characterized in that: The waste liquid pipe (42) is one of spiral shape and natural long U shape, and the length of the waste liquid pipe (42) is much greater than the vertical distance between the clamping connector (41) and the liquid discharge head (43).

3. The high-pressure injection pump with waste liquid recovery function according to claim 1, characterized in that: The inner part of the pipe positioning ring (732) is excavated with an annular groove (701), a plurality of annular arrayed magnetic dynamic inserts (82) are slidably connected in the annular groove (701), the hard ring sleeve (81) is a T-shaped structure, the flat end of the hard ring sleeve (81) is fixedly connected with an annular groove, and the annular groove is matched with the magnetic dynamic insert (82).

4. The high-pressure injection pump with waste liquid recovery function according to claim 3, characterized in that: The laminated monitoring ring is further sleeved with an outer control ring (83), the outer sleeve ring (731) is fixedly connected with a limiting ring away from the edge of the clamped joint (41), the outer control ring (83) and the plurality of magnetic dynamic inserts (82) have magnetic attraction force, the annular groove and the magnetic dynamic inserts (82) also have magnetic attraction force, and the transverse span of the outer control ring (83) is smaller than the transverse span of the outer sleeve ring (731) and the interlayer compensation ring (733).

5. The high-pressure syringe pump with waste liquid recycling function according to claim 4, characterized in that: The interlayer compensation ring (733) comprises an elastic ring of an outer layer and an elastic hollow capsule fixedly connected with the inner wall of the elastic ring, the elastic hollow capsule is saturatedly filled with magnetorheological fluid, the guide rod (72) corresponds to the elastic ring, and the elastic hollow capsule is also fixedly provided with a pressure sensor (703) close to the inner wall of the outer sleeve ring (731), and the pressure sensor (703) is signal-connected with the control terminal (1).

6. The high-pressure injection pump with waste liquid recovery function according to claim 5, characterized in that: The outer sleeve ring (731) is made of an electromagnetic material, the outer sleeve ring (731) comprises two mutually attached pre-compensation ring bodies and a plurality of electric push rods (702) mounted between the two pre-compensation ring bodies, the elongated end of the electric push rod (702) faces the side of the clamped joint (41), and the electric push rod (702) is also signal-connected with the control terminal (1).

7. The high-pressure injection pump with waste liquid recovery function according to claim 6, characterized in that: The guide rod (72) movably penetrates the pre-compensation ring body close to the side of the clamped joint (41) and is fixedly connected with the other pre-compensation ring body, and the outer end of the guide rod (72) is also fixedly connected with a liquid inlet (704), the liquid inlet (704) fixedly penetrates the elastic hollow capsule and extends into the inside of the elastic hollow capsule.

8. The high-pressure injection pump with waste liquid recovery function according to claim 7, characterized in that: The guide rod (72) is a hard hollow transparent structure, the inner wall of the guide rod (72) is coated with a force-induced color-changing coating, and the magnetorheological fluid also saturates the guide rod (72).

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