High-pressure injection pump with waste liquid recovery function

Abstract

The invention relates to a high-pressure injection pump with a waste liquid recovery function applied to the related technical field of injection pumps, through the arrangement of a micro-elastic looseness compensation unit at the joint of a clamping joint and a waste liquid pipe, when a looseness condition occurs, the looseness compensation unit slightly deforms, and the waste liquid is recovered; after the abnormity is monitored, the micro-elastic looseness compensation unit can be controlled to denature and harden, further the waste liquid pipe is prevented from continuing to loosen, meanwhile, the looseness compensation unit can be automatically separated to a certain degree, the waste liquid pipe is pushed reversely, and the looseness of the waste liquid pipe is prevented. And compared with the prior art, the high-pressure injection pump has the advantages that the waste liquid can be stably recycled, the leakage condition is not easy to occur, the stability of backwashing the high-pressure injection pump is greatly improved, and the continuous proceeding of the process is effectively ensured.

Description

Technical Field

[0001] The present invention relates to a high-pressure syringe pump with a waste liquid recovery function, and in particular to a high-pressure syringe pump with a waste liquid recovery function applied to the technical field related to syringe pumps. Background Art

[0002] As an auxiliary device in a radiology diagnosis and treatment system, a high-pressure syringe pump has gradually been clinically applied with the development of technologies such as X-rays, rapid film changers, image intensifiers, and artificial contrast agents. The basic function of a high-pressure syringe is to quickly and accurately inject a sufficient amount of high-concentration X-ray contrast agent into the examination site through percutaneous puncture into a blood vessel or through an original body orifice of the human body within a certain period of time, so as to perform diagnostic angiography and treatment on the diseased site.

[0003] The Chinese patent specification with the publication number CN118831217A discloses a high-pressure syringe pump with a quick clamping structure. Through the setting of an automatic clamping unit, the external connecting pipe can be automatically locked and connected to the clamping joint, and through the setting of a plugging and unplugging detection unit, it can automatically detect whether the operation of plugging and unplugging a medicine bottle is performed, so that the central processing unit can automatically control operations such as exhaust, liquid filling, and readiness after connecting the external connecting pipe. Compared with the prior art, it effectively reduces the dependence on manual labor, makes the connection accuracy higher, and reduces the probability of the connection not being in place.

[0004] When cleaning the high-pressure syringe pump, the waste liquid pipe is also connected to the above-mentioned automatic clamping unit through a 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, it is easy to cause the waste liquid pipe and the clamping pipe head to become loose and leak. Seriously, it may even cause the two to separate directly and the waste liquid to spray out, posing a large safety hazard and affecting the continuity and stability of the backwashing process. Summary of the Invention

[0005] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is that the connection between the waste liquid pipe and the clamping pipe head is prone to looseness and liquid leakage due to the relatively large waste liquid pressure during backwashing, affecting the continuity and stability of the backwashing process.

[0006] To solve the above problems, the present invention provides a high-pressure injection pump with a waste liquid recovery function, which includes a control terminal and an injection pump body. A data cable is connected between the control terminal and the back of the injection pump body, and a power cable is also connected to the back of the control terminal. A quick clamping structure is installed at the side end of the injection pump body, and a waste liquid recovery unit is arranged at the clamping port of the quick clamping structure. The waste liquid recovery unit includes a recovery pipeline connected to the clamping port of the quick clamping structure, a waste liquid bucket located directly below the drainage port of the recovery pipeline, and a waste liquid bag tied to the injection pump body by a hanging rope. A connecting seat is fixedly connected to the lower end of the quick clamping structure, the waste liquid bucket is clamped to the connecting seat, and a liquid guide pipe is fixedly connected between the bottom of the waste liquid bucket and the waste liquid bag. The drainage port of the recovery pipeline is located directly above the waste liquid bucket; The recovery pipeline includes a clamping joint connected to the clamping port of the quick clamping structure, a waste liquid pipe clamped to one end of the clamping joint away from the quick clamping structure, and a drainage head inserted at the lower end of the clamping joint. The drainage head is fixedly connected to the end of the waste liquid pipe, and the mouth of the drainage head faces directly downward and is directly opposite to the center of the waste liquid bucket; A loosening compensation unit is arranged at the connection between the clamping joint and the waste liquid pipe. The loosening compensation unit includes a positioning ring fixedly connected to the end of the clamping joint, a stacked 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 stacked monitoring ring. A hard ring sleeve is fixedly inlaid at the outer end of the waste liquid pipe, the stacked monitoring ring is clamped to the hard ring sleeve, and the hard ring sleeve abuts against the inner wall close to the clamping joint.

[0007] In the above high-pressure injection pump with a waste liquid recovery function, through the setting of the loosening compensation unit at the connection between the clamping joint and the waste liquid pipe, the loosening abnormality can be detected when loosening occurs, and sealing compensation can be carried out for the loosening, so as to inhibit the expansion of the loosening situation and maintain the stable progress of the backwashing process of the high-pressure injection pump.

[0008] As a further improvement of the present application, the waste liquid pipe is one of a spiral shape and a long U shape with natural drooping, and the length of the waste liquid pipe is much greater than the vertical distance between the clamping joint and the drainage head.

[0009] As a further improvement of the present application, along the direction away from the clamping joint, the stacked monitoring ring sequentially includes a fixed pipe ring, a sandwich compensation ring, and an outer sleeve ring. The sandwich compensation ring is fixedly connected to the fixed pipe rings and the outer sleeve ring on both sides at the same time, and a plurality of guide rods movably penetrate through the fixed pipe ring and the sandwich compensation ring and are fixedly connected to the outer sleeve ring.

[0010] As a further improvement of the present application, an annular groove is dug inside the fixed pipe ring, and a plurality of magnetically driven inserts distributed in an annular array are slidably connected in the annular groove. The hard ring sleeve is a T-shaped structure, and an annular groove is fixedly connected to the flat end of the hard ring sleeve, and the annular groove matches the magnetically driven inserts.

[0011] As a further improvement of the present application, an outer control ring is sleeved outside the stacked monitoring ring. The edge of the outer sleeve ring away from the clamping joint is fixedly connected to the limiting ring. There is a magnetic attraction force between the outer control ring and the multiple magnetic driving inserts, and there is also a magnetic attraction force between the annular groove and the magnetic driving inserts. Moreover, the lateral span of the outer control ring is smaller than the lateral spans of the outer sleeve ring and the sandwich compensation ring.

[0012] As a further improvement of the present application, the sandwich compensation ring includes an outer elastic ring and an elastic hollow capsule fixedly connected to the inner wall of the elastic ring. The elastic hollow capsule is saturated with a magnetorheological fluid filled therein. Moreover, the guide rod corresponds to the elastic ring. A pressure sensor is fixedly installed on the inner wall of the elastic hollow capsule close to the outer sleeve ring, and the pressure sensor is in signal connection with the control terminal.

[0013] As a further improvement of the present application, the outer sleeve ring is made of an electromagnetic material. The outer sleeve ring includes two mutually attached pre-compensation ring bodies and a plurality of electric push rods installed between the two pre-compensation ring bodies. Moreover, the extending end of the electric push rod faces the side of the clamping joint, and the electric push rod is also in signal connection with the control terminal.

[0014] As another improvement of the present application, the guide rod movably penetrates through the pre-compensation ring body close to the clamping joint side and is fixedly connected to the other pre-compensation ring body. A liquid inlet is also fixedly connected to the outer end of the guide rod, and the liquid inlet fixedly penetrates through the elastic hollow capsule and extends into its interior.

[0015] As a supplementary improvement of the present application, the guide rod is a hard and hollow transparent structure, and the inner wall of the guide rod is coated with a force-induced color-changing coating, and the magnetorheological fluid also saturates and fills the guide rod.

[0016] As a supplementary improvement of the present application, the guide rod movably penetrates through the pre-compensation ring body close to the clamping joint side and is fixedly connected to the other pre-compensation ring body. A liquid inlet is also fixedly connected to the outer end of the guide rod, and the liquid inlet fixedly penetrates through the elastic hollow capsule and extends into its interior.

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

[0018] In summary, by providing a micro-elastic loosening compensation unit at the connection between the clamping joint and the waste liquid pipe, when loosening occurs, the waste liquid pipe has a tendency to move away from the clamping joint. At this time, it will squeeze the loosening compensation unit, and the loosening compensation unit will deform slightly accordingly. Furthermore, it can trigger the pressure sensor inside it, thereby achieving the effect of real-time monitoring of abnormal loosening at the connection between the clamping joint and the waste liquid pipe. When this abnormality is detected, the micro-elastic loosening compensation unit can be controlled to denature and harden, making it difficult to continue deforming, thus preventing the situation where the loosening range of the waste liquid pipe expands. At the same time, the loosening compensation unit can also perform a certain degree of self-separation and push the waste liquid pipe in the reverse direction, thereby compensating for the loosening of the waste liquid pipe in the reverse direction, and then restoring the connection between the waste liquid pipe and the clamping joint, thus achieving the effect of self-compensation of sealing. Compared with the prior art, it can stably recover the waste liquid, is not prone to leakage, and greatly improves the stability during the backwashing of the high-pressure injection pump, effectively ensuring the continuous progress of this process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front perspective view of the first embodiment of the present application; Figure 2 is a rear perspective view of the first embodiment of the present application; Figure 3 is a perspective view of a part when the waste liquid recovery unit of the first embodiment of the present application is installed on the quick clamping structure; Figure 4 is a side view of a part when the waste liquid recovery unit of the first embodiment of the present application is installed on the quick clamping structure; Figure 5 is a perspective view of the recovery pipeline of the first embodiment of the present application; Figure 6 is an exploded view of the recovery pipeline of the first embodiment of the present application; Figure 7 is a perspective view of the waste liquid pipe in the shape of a long U in the recovery pipeline of the first embodiment of the present application; Figure 8 is a perspective view of the loosening compensation unit part of the first embodiment of the present application; Figure 9 is a front cross-sectional view of the loosening compensation unit part of the first embodiment of the present application; Figure 10 is a schematic diagram when loosening occurs at the connection between the waste liquid pipe and the clamping interface of the first embodiment of the present application; Figure 11 is a front view of the sandwich compensation ring of the first embodiment of the present application; Figure 12 is a schematic diagram when reverse compensation for loosening is performed in the first embodiment of the present application; Figure 13Schematic cross-section of the stacked monitoring ring according to the first and second embodiments of the present application; Figure 14 Top view of the guide rod according to the second embodiment of the present application.

[0020] Explanation of the reference numerals in the figure: 1 Control terminal, 101 Data line, 102 Power line, 2 Injection pump body, 3 Quick clamping structure, 301 Connection seat, 4 Recovery pipeline, 41 Clamping joint, 42 Waste liquid pipe, 43 Drain head, 5 Waste liquid bucket, 501 Liquid guide pipe, 6 Waste liquid bag, 7 Loosening compensation unit, 71 Positioning ring, 72 Guide rod, 731 Outer sleeve ring, 732 Fixed pipe ring, 733 Interlayer compensation ring, 701 Annular groove, 702 Electric push rod, 703 Pressure sensor, 704 Liquid inlet, 81 Hard ring sleeve, 82 Magnetic moving insert, 83 Outer control ring. Specific embodiments

[0021] The following will describe in detail the two embodiments of the present application with reference to the accompanying drawings.

[0022] The first embodiment: Figure 1-2 A high-pressure injection pump with a waste liquid recovery function is shown, including 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 injection pump body 2, and a power line 102 is also connected to the back of the control terminal 1. A quick clamping structure 3 is installed at the side end of the injection pump body 2, and a waste liquid recovery unit is provided at the clamping port of the quick clamping structure 3. For example Figure 3-4 , the waste liquid recovery unit includes a recovery pipeline 4 connected to the clamping port of the quick clamping structure 3, a waste liquid bucket 5 directly below the drain port of the recovery pipeline 4, and a waste liquid bag 6 tied to the injection pump body 2 by a hanging rope. A connection seat 301 is fixedly connected to the lower end of the quick clamping structure 3, and the waste liquid bucket 5 is clamped to the connection seat 301. A liquid guide pipe 501 is fixedly connected between the bottom of the waste liquid bucket 5 and the waste liquid bag 6. The drain port of the recovery pipeline 4 is located directly above the waste liquid bucket 5. When the injection pump is backflushed, the waste liquid inside flows out along the recovery pipeline 4 and falls into the waste liquid bucket 5, and then enters the waste liquid bag 6 along the liquid guide pipe 501 to achieve the recovery of waste liquid.

[0023] Such as Figure 5-6, the recovery pipeline 4 includes a clamping joint 41 connected to the clamping port of the quick clamping structure 3, a waste liquid pipe 42 clamped at one 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, and the liquid discharge head 43 corresponds to the lower end of the T-shape. The liquid discharge head 43 is fixedly connected to the end of the waste liquid pipe 42. The mouth of the liquid discharge head 43 faces directly downward and is aligned with the center of the waste liquid bucket 5. A loosening compensation unit 7 is provided at the connection between the clamping joint 41 and the waste liquid pipe 42. By setting the loosening compensation unit 7 at the connection between the clamping joint 41 and the waste liquid pipe 42, loosening abnormalities can be detected when loosening occurs, and sealing compensation can be performed for the loosening, thereby suppressing the expansion of the loosening situation to maintain the stable progress of the backwashing process of the high-pressure injection pump.

[0024] As Figure 6-7 , the waste liquid pipe 42 is one of a spiral shape and a long U-shape of natural drooping. In specific implementation, a suitable shape can be selected according to needs. Moreover, 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 relatively long length of the waste liquid pipe 42 is mainly for pressure reduction and buffering. After the waste liquid with a relatively high pressure flows through a long path, the pressure becomes smaller. As a result, when it falls into the waste liquid bucket 5, the situation of excessive spraying is not likely to occur, reducing the occurrence of waste liquid splashing.

[0025] As Figure 8-9, the loosening compensation unit 7 includes a positioning ring 71 fixedly connected to the end of the clamping joint 41, a stacked monitoring ring sleeved on the outer end of the waste liquid pipe 42, and a plurality of guide rods72 fixedly connected between the positioning ring 71 and the stacked monitoring ring. A hard ring sleeve 81 is fixedly embedded at the outer end of the waste liquid pipe 42. The stacked monitoring ring is snap-connected to the hard ring sleeve 81, and the hard ring sleeve 81 abuts against the inner wall close to the clamping joint 41. An annular groove 701 is formed inside the fixed pipe ring 732. A plurality of magnetically driven inserts 82 distributed in an annular array are slidably connected in the annular groove 701. The hard ring sleeve 81 has a T-shaped structure, and an annular groove is fixedly connected to the straight end of the hard ring sleeve 81, and the annular groove matches the magnetically driven insert 82. An outer control ring 83 is also sleeved outside the stacked monitoring ring. A limiting ring is fixedly connected to the edge of the outer sleeve ring 731 away from the clamping joint 41. There is a magnetic attraction force between the outer control ring 83 and the plurality of magnetically driven inserts 82. During use, the outer control ring 83 can be first moved to the outer end of the fixed pipe ring 732 to adsorb the plurality of magnetically driven inserts 82, so that it retracts into the annular groove 701. Then, the waste liquid pipe 42 is passed through the stacked monitoring ring and normally snap-connected to the waste liquid pipe 42. When the two are connected, the outer control ring 83 can be moved again to make the outer control ring 83 away from the outer sleeve ring 731. At this time, without the restraint of the outer control ring 83, the plurality of magnetically driven inserts 82 quickly move towards the inside under the magnetic adsorption of the annular groove, and then are stuck in the annular groove, so that the stacked monitoring ring is temporarily integrated with the waste liquid pipe 42. When the waste liquid pipe 42 is loosened from the clamping joint 41, it will cause a change in the linkage of the stacked monitoring ring, achieving the effect of loosening monitoring.

[0026] There is also a magnetic attraction force between the annular groove and the magnetically driven insert 82, and the transverse span of the outer control ring 83 is smaller than the transverse spans of the outer sleeve ring 731 and the sandwich compensation ring 733, so that the outer control ring 83 can be completely misaligned with the fixed pipe ring 732, thus not affecting the movement of the magnetically driven insert 82 towards the annular groove. In addition, the radial length of the magnetically driven insert 82 is the same as the depth of the annular groove 701, and the depth of the annular groove is less than the depth of the annular groove 701, effectively ensuring that both ends of the magnetically driven insert 82 can be located in the annular groove 701 and the annular groove at the same time, making the effect of temporarily integrating the waste liquid pipe 42 with the stacked monitoring ring better.

[0027] Along the direction away from the clamping joint 41, the stacked monitoring ring sequentially includes a fixed pipe ring 732, a sandwich compensation ring 733 and an outer sleeve ring 731. The outer sleeve ring 731 is made of electromagnetic material. The sandwich compensation ring 733 is fixedly connected to the fixed pipe ring 732 and the outer sleeve ring 731 on both sides at the same time. A plurality of guide rods 72 movably penetrate through the fixed pipe ring 732 and the sandwich compensation ring 733 and are fixedly connected to the outer sleeve ring 731, as Figure 11The sandwich compensation ring 733 includes an outer elastic ring and an elastic hollow capsule fixedly connected to the inner wall of the elastic ring. The elastic hollow capsule is saturated with magnetorheological fluid, and the guide rod 72 corresponds to the elastic ring. The inner wall of the elastic hollow capsule close to the outer sleeve 731 is also fixedly installed with a pressure sensor 703. The pressure sensor 703 is connected to the control terminal 1 signal. When the connection between the waste liquid pipe 42 and the clamping joint 41 is loose, such as Figure 10 Under the action of hydraulic pressure, the waste liquid pipe 42 moves away from the clamping joint 41. At this time, the fixed pipe ring 732 moves accordingly, and due to the limitation of the guide rod 72, the outer ring 731 does not move. At this time, the elastic sandwich compensation ring 733 will be squeezed, and the pressure sensor 703 inside it will be triggered, 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 sandwich compensation ring 733 hardens, making it difficult to move laterally, thereby suppressing the continued movement of the waste liquid pipe 42, and effectively avoiding the expansion of the loose range.

[0028] like Figure 13 The outer sleeve 731 includes two pre-compensating ring bodies attached to each other and a plurality of electric push rods 702 installed between the two pre-compensating ring bodies, and the extended ends of the electric push rods 702 face the clamping joint 41 side. The electric push rods 702 are also connected to the control terminal 1 by signal. The guide rod 72 movably penetrates the pre-compensating ring body near the clamping joint 41 side and is fixedly connected to the other pre-compensating ring body. Figure 12 When the sandwich compensation ring 733 hardens under the magnetic field, the control terminal 1 can continue to control the electric push rod 702 to start, which will unidirectionally push the pre-compensation ring body close to the clamping joint 41 side, thereby pushing the hardened sandwich compensation ring 733, the fixed pipe ring 732 and the waste liquid pipe 42 connected to the fixed pipe ring 732, thereby moving the waste liquid pipe 42 toward the clamping joint 41 side, realizing reverse compensation for looseness, so that the connection between the waste liquid pipe 42 and the clamping joint 41 can be temporarily restored. Due to the friction, its sealing can also be restored, so that the backwashing process can be uninterrupted, so that the maintenance at this place can be carried out after the backwashing, which is not easy to affect the continuity of this backwashing, and effectively ensure the efficiency of the backwashing.

[0029] 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 tends to move away from the clamping joint 41. At this time, it will squeeze the loosening compensation unit 7, and the loosening compensation unit 7 will deform slightly accordingly. Furthermore, it can trigger the pressure sensor inside it, thereby realizing the effect of real-time monitoring of the abnormal loosening at the connection between the clamping joint 41 and the waste liquid pipe 42. When this abnormality is detected, the micro-elastic loosening compensation unit 7 can be controlled to denature and harden, making it difficult to continue deforming, thus preventing the situation where the loosening range of the waste liquid pipe 42 expands. At the same time, the loosening compensation unit 7 can also perform a certain degree of self-separation and push the waste liquid pipe 42 in the reverse direction, thereby compensating for the loosening of the waste liquid pipe 42 in the reverse direction, and then enabling the waste liquid pipe 42 to resume its connection with the clamping joint 41, thereby achieving the effect of sealing self-compensation. Compared with the prior art, the waste liquid can be stably recovered, leakage is not likely to occur, and the stability during the backwashing of the high-pressure injection pump is greatly improved, effectively ensuring the continuous progress of this process.

[0030] The second implementation mode: Based on the first implementation mode, in this implementation mode, the guide rod 72 is further improved, and the rest is the same as the first implementation mode.

[0031] As Figure 14 , in the figure, a represents the force-induced color change coating. An liquid inlet 704 is also fixedly connected to the outer end of the guide rod 72. The liquid inlet 704 fixedly penetrates through the elastic hollow capsule and extends into its interior. The guide rod 72 is a rigid hollow transparent structure, and the inner wall of the guide rod 72 is coated with a force-induced color change coating. The magnetorheological fluid also saturates and fills the guide rod 72. In this implementation mode, when local loosening occurs, the guide rod 72 moves away from the clamping joint 41 along with the waste liquid pipe 42. Due to the limitation of the guide rod 72, the outer sleeve ring 731 and the sandwich compensation ring 733 cannot move along with it. When the sandwich compensation ring 733 is squeezed and slightly deformed, as Figure 13 , some of the magnetorheological fluid inside it will move along the liquid inlet 704 towards the inside of the guide rod 72, thereby increasing the pressure inside the guide rod 72. At this time, the force-induced color change coating is significantly squeezed and changes color. At this time, the on-site operator can immediately understand the loosening situation at this place, which is convenient for taking certain artificial intervention measures in a timely manner. Compared with the first implementation mode, with dual operations, the safety is improved, and the situation where the waste liquid pipe 42 detaches from the clamping joint 41 is further reduced.

[0032] It should be noted that the force-induced color change coating is preferably a coating with reversible color change.

[0033] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application, the protection scope is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A high-pressure syringe pump with waste liquid recovery function, comprising a control terminal (1) and a syringe pump body (2). A data cable (101) is connected between the back of the control terminal (1) and the syringe pump body (2). A power cable (102) is also connected to the back of the control terminal (1). A quick clamping structure (3) is installed on the side end of the syringe pump body (2), characterized in that: A waste liquid recovery unit is provided at the clamping opening of the quick clamping structure (3). The waste liquid recovery unit includes a recovery pipeline (4) connected to the clamping opening of the quick clamping structure (3), a waste liquid bucket (5) located directly below the drainage outlet of the recovery pipeline (4), and a waste liquid bag (6) tied to the injection pump body (2) by a hanging rope. A connecting seat (301) is fixedly connected to the lower end of the quick clamping structure (3), and the waste liquid bucket (5) is clamped to the connecting seat (301). A liquid guide pipe (501) is fixedly connected between the bottom of the waste liquid bucket (5) and the waste liquid bag (6), and the drainage outlet of the recovery pipeline (4) is located directly above the waste liquid bucket (5). The recovery pipeline (4) includes a clamping joint (41) connected to the clamping opening of the quick clamping structure (3), a waste liquid pipe (42) clamped to one end of the clamping joint (41) away from the quick clamping structure (3), and a drainage head (43) inserted at the lower end of the clamping joint (41). The drainage head (43) is fixedly connected to the end of the waste liquid pipe (42), and the mouth of the drainage head (43) faces directly downward and is aligned with the center of the waste liquid bucket (5). A loosening compensation unit (7) is provided at the connection between the clamping joint (41) and the waste liquid pipe (42). The loosening compensation unit (7) includes a positioning ring (71) fixedly connected to the end of the clamping joint (41), a stacked 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 stacked monitoring ring. A hard ring sleeve (81) is fixedly inlaid at the outer end of the waste liquid pipe (42), and the stacked monitoring ring is clamped to the hard ring sleeve (81), and the hard ring sleeve (81) abuts against the inner wall close to the clamping joint (41).

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

3. A high-pressure injection pump with a waste liquid recovery function according to claim 1, characterized in that: Along the direction away from the clamping joint (41), the stacked monitoring ring sequentially includes a fixed pipe ring (732), a sandwich compensation ring (733), and an outer sleeve ring (731). The sandwich compensation ring (733) is fixedly connected to the fixed pipe rings (732) and the outer sleeve ring (731) on both sides at the same time, and the plurality of guide rods (72) movably penetrate through the fixed pipe ring (732) and the sandwich compensation ring (733) and are fixedly connected to the outer sleeve ring (731).

4. A high-pressure injection pump with a waste liquid recovery function according to claim 3, characterized in that: An annular groove (701) is dug inside the fixed pipe ring (732), and a plurality of magnetically driven inserts (82) distributed in an annular array are slidably connected in the annular groove (701). The hard ring sleeve (81) is a T-shaped structure, and an annular groove is fixedly connected to the flat end head office of the hard ring sleeve (81), and the annular groove is matched with the magnetically driven insert (82).

5. A high-pressure injection pump with a waste liquid recovery function according to claim 4, characterized in that: An outer control ring (83) is sleeved outside the stacked monitoring ring. A limiting ring is fixedly connected to the edge of the outer sleeve ring (731) away from the clamping joint (41). There is a magnetic attraction force between the outer control ring (83) and a plurality of magnetic moving inserts (82), and there is also a magnetic attraction force between the annular groove and the magnetic moving inserts (82). Moreover, the lateral span of the outer control ring (83) is smaller than the lateral spans of the outer sleeve ring (731) and the interlayer compensation ring (733).

6. The high-pressure syringe pump with a waste liquid recovery function according to claim 5, wherein: The interlayer compensation ring (733) includes an outer elastic ring and an elastic hollow capsule fixedly connected to the inner wall of the elastic ring. The elastic hollow capsule is saturated with a magnetorheological fluid filled therein. The guide rod (72) corresponds to the elastic ring. A pressure sensor (703) is fixedly installed on the inner wall of the elastic hollow capsule close to the outer sleeve ring (731). The pressure sensor (703) is in signal connection with the control terminal (1).

7. The high-pressure syringe pump with waste liquid recovery function according to claim 6, characterized in that: The outer sleeve ring (731) is made of an electromagnetic material. The outer sleeve ring (731) includes two mutually attached pre-compensation ring bodies and a plurality of electric push rods (702) installed between the two pre-compensation ring bodies. The extending ends of the electric push rods (702) face the side of the clamping joint (41). The electric push rods (702) are also in signal connection with the control terminal (1).

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

9. The high-pressure syringe pump with a waste liquid recovery function according to claim 8, wherein: The guide rod (72) is a hard and hollow transparent structure. A force-induced color change coating is coated on the inner wall of the guide rod (72). The magnetorheological fluid also fills the guide rod (72) saturatedly.

Images