Waterproof heparin pump
By incorporating an integrated mounting section and sealing ring on the heparin pump's injection assembly, combined with an annular step and water reservoir structure, the problem of drug leakage was solved, improving the heparin pump's waterproof performance and sealing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING JAFRON MEDICAL EQUIP CO LTD
- Filing Date
- 2025-02-27
- Publication Date
- 2026-04-10
AI Technical Summary
After prolonged use, existing heparin pumps are prone to leakage of medication or disinfectant along the gaps on the surface of the injection component housing, leading to the failure of internal components and affecting normal use.
An integrally molded mounting part is provided on the surface of the injection component housing, and a sealing ring is fitted on it. The seal is achieved through annular steps and threaded structure. Combined with the sealing cap of the touch switch and the water storage tank structure, the waterproof performance is enhanced.
This effectively reduces the penetration of liquid medicine or disinfectant into the injection assembly, improves the waterproof performance and sealing of the heparin pump, and ensures stable operation of the equipment.
Smart Images
Figure CN224099755U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical equipment manufacturing technical field especially relates to a waterproof heparin pump. BACKGROUND
[0002] Heparin is a widely used anticoagulant drug, mainly used for the prevention and treatment of thrombotic diseases. And heparin pump is a kind of medical equipment for continuous infusion of heparin, which plays an important role in anticoagulant therapy. For example, in medical practice, in order to prevent blood from coagulating during extracorporeal circulation, the infusion rate of heparin needs to be accurately controlled by heparin pump during treatment, and heparin needs to be continuously injected into the patient's blood, so as to ensure the safe and effective use of the drug.
[0003] Heparin pump generally includes pump shell assembly, push injection assembly and drive assembly. Among them, the pump shell assembly is the basic framework of the whole device, which not only provides the installation position for other components, but also plays the role of protecting the internal components from the external environment; the push injection assembly is mainly responsible for pushing the piston in the syringe to accurately control the infusion amount and speed of the drug; and the drive assembly is mainly responsible for controlling the movement of the push injection assembly to provide driving force for the movement of the push injection assembly.
[0004] In the actual operation process of heparin pump, first, the syringe needs to be installed on the pump shell assembly for fixation, and at the same time, the piston of the syringe is fixed by the fixing component on the push injection assembly, then the movement of the push injection assembly is controlled by the drive assembly, so as to drive the piston in the syringe to move, realizing the injection of heparin. In the prior art, a hole is generally opened on the surface of the shell of the push injection assembly for installing the fixing component. After long-term use of heparin pump, liquid medicine or other disinfectants used for cleaning and disinfection can easily seep into the inside of the push injection assembly along the gap on the surface of the shell of the push injection assembly, causing the internal components to fail, thereby affecting the normal use of heparin pump. UTILITY MODEL CONTENTS
[0005] The utility model provides a waterproof heparin pump, which can improve the waterproof performance of heparin pump. The specific scheme is as follows:
[0006] A waterproof heparin pump, comprising a pump shell assembly, a push injection assembly and a drive assembly; the pump shell assembly can be used to fix a syringe; the push injection assembly is provided with a fixing component, which can be used to fix the piston on the syringe; the drive assembly can be used to drive the push injection assembly to move; specifically, at least one integrated mounting part is arranged on the surface of the shell of the push injection assembly, and the mounting part protrudes from the surface of the shell of the push injection assembly, and the fixing component is inserted into the push injection assembly through the mounting part.
[0007] Further, the installation part is provided with a first installation hole communicated with the inner cavity of the push injection assembly shell, and an annular step is arranged on the end surface of the installation part in contact with the fixing part, and a sealing rubber ring is sleeved outside the annular step.
[0008] Further, the cross section of the sealing rubber ring is in the shape of "D", and a threaded groove is arranged on the inner circumferential surface of the sealing rubber ring, and a thread is arranged on the outer circumferential surface of the annular step.
[0009] Further, the number of installation parts on the push injection assembly is two; the fixing part comprises a left clamping part and a right clamping part, and the left clamping part and the right clamping part are inserted and installed on the push injection assembly through the installation parts; the left clamping part and the right clamping part are openable and closable for clamping the end part of the piston on the syringe.
[0010] Further, the installation part is arranged on the push-pull box of the push injection assembly, a second installation hole is arranged at the position of the push-pull box in contact with the end surface of the piston, and a touch switch is installed on the second installation hole; a sealing cap is arranged on the surface of the touch switch, a first upward turning edge is arranged on the edge of the sealing cap in abutment with the inner wall of the second installation hole, and the first upward turning edge forms a first water storage groove with the opening upward.
[0011] Further, a second upward turning edge is arranged on the bottom of the first upward turning edge, and a sealed second water storage groove is formed between the second upward turning edge and the inner wall of the shell of the push-pull box.
[0012] Further, the pump shell assembly comprises a pump shell and a pressing part; a V-shaped groove with the opening downward and a clearance groove for placing the hand holding part of the outer cylinder of the syringe are arranged on the bottom of the pump shell and are adapted to the outer cylinder of the syringe; the pressing part can fix the syringe in the V-shaped groove.
[0013] Further, the pressing part comprises a pressing block, a connecting rod, a first sliding block, a spring and a first linear potentiometer; the connecting rod penetrates through the bottom of the pump shell, the first sliding block and the pressing block are fixedly arranged on the upper end and the lower end of the connecting rod respectively, the spring is sleeved on the outer lateral wall of the connecting rod, and the bottom of the spring is in abutment with the inner bottom surface of the pump shell; the first linear potentiometer is fixed in the pump shell and is parallel to the connecting rod, and the first sliding block is in sliding connection with the first linear potentiometer.
[0014] Further, the driving assembly comprises a motor, a transmission component, a lead screw, a guide shaft and a second sliding block; the transmission component comprises a driving gear, a driven gear and a transmission gear, the driving gear is fixedly connected with the output end of the motor, the driven gear is fixedly connected with the first end of the lead screw, and the transmission gear is located between the driving gear and the driven gear and is engaged with the driving gear and the driven gear; the lead screw is arranged in parallel with the guide shaft, the second sliding block is threadedly connected with the lead screw, and the second sliding block is movably sleeved on the guide shaft; and the second sliding block is fixedly connected with the bolus injection assembly.
[0015] Further, the driving assembly further comprises a second linear potentiometer and a pressure sensor; the second linear potentiometer is parallel to the lead screw, and the second sliding block is slidably connected with the second linear potentiometer; the pressure sensor is located at the second end of the lead screw, and a contact head is arranged between the pressure sensor and the second end of the lead screw.
[0016] The waterproof heparin pump provided by the utility model, through setting the installation part for inserting and fixing the component on the bolus injection assembly, and the installation part protruding from the surface of the shell of the bolus injection assembly and being integrally formed with the surface of the shell of the bolus injection assembly, compared with the mode of directly opening holes on the surface of the shell of the bolus injection assembly for installation in the prior art, the situation that the liquid medicine or other disinfectants for cleaning and disinfection seep into the inside of the bolus injection assembly along the gap of the surface of the shell of the bolus injection assembly can be reduced, and the waterproof performance is improved.
[0017] Further, through setting the annular step for installing the sealing rubber ring on the end face of the installation part, the sealing rubber ring is tightly sleeved on the outer side wall of the annular step, when the insertion end of the component is inserted and fixed into the first installation hole of the installation part, and the downward flange of the insertion end is buckled on the end face of the installation part, the inner and outer sides of the sealing rubber ring are extruded to form the annular step and the downward flange of the insertion end respectively, the sealing between the component and the installation part is realized, and the waterproof performance can be further improved.
[0018] Further, by setting a threaded groove on the inner circumferential surface of the sealing rubber ring and a thread on the outer circumferential surface of the annular step corresponding to the threaded groove, the sealing rubber ring can be more tightly installed on the annular step, and axial movement of the sealing rubber ring is prevented.
[0019] Further, when the push-pull box is provided with a touch switch, a sealing cap is arranged on the surface of the touch switch to form a sealing structure, and the sealing cap is provided with a first upturned edge, the outer edge of the first upturned edge abuts against the inner wall of the second mounting hole to form a seal, and the first upturned edge is open upward to form a first water storage groove, which can prevent liquid from flowing into the push injection assembly from the gap between the touch switch and the push-pull box, thereby further enhancing the sealing performance of the waterproof heparin pump and improving the waterproof effect.
[0020] Further, a second upturned edge is arranged at the bottom of the first upturned edge, and the second upturned edge and the inner wall of the shell of the push-pull box are embedded to form a sealed second water storage groove, which can be used to collect liquid permeated from the gap between the sealing cap and the push-pull box and prevent liquid from further flowing into the push-pull box, thereby achieving secondary waterproof between the touch switch and the push-pull box and further improving the sealing performance of the waterproof heparin pump and improving the waterproof effect. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 Structure diagram of the waterproof heparin pump.
[0022] Figure 2 Structure diagram of the waterproof heparin pump in use Figure 1 .
[0023] Figure 3 Structure diagram of the waterproof heparin pump in use Figure 2 .
[0024] Figure 4 Structure diagram of the push injection assembly Figure 1 .
[0025] Figure 5 Structure diagram of the push injection assembly Figure 2 .
[0026] Figure 6 Figure 5 Cross-sectional view of A-A direction in
[0027] Figure 7 Figure 6 Local enlarged view of A part in
[0028] Figure 8 Local enlarged view of B part in Figure 6
[0029] Figure 9 Structure diagram of the pump shell assembly Figure 1 .
[0030] Figure 10 Structure diagram of the pump shell assembly Figure 2 .
[0031] Figure 11 Structure of the pressing component
[0032] Figure 12 Structure of the driving assembly Figure 1 .
[0033] Figure 13 Structure of the driving assembly Figure 2 (in cross-sectional view).
[0034] The reference signs are as follows: 1 is the injector, 11 is the piston, 2 is the pump shell assembly, 21 is the pump shell, 211 is the V-shaped groove, 212 is the recess, 22 is the pressing component, 221 is the pressing block, 222 is the connecting rod, 223 is the first sliding block, 224 is the spring, 225 is the first linear potentiometer, 3 is the injection assembly, 31 is the fixed component, 31A is the left clamping part, 31B is the right clamping part, 311 is the insertion end, 32 is the mounting part, 321 is the first mounting hole, 322 is the annular step, 323 is the sealing rubber ring, 33 is the push-pull box, 331 is the second mounting hole, 34 is the touch switch, 35 is the sealing cap, 351 is the first upper flange, 352 is the first water storage groove, 353 is the second upper flange, 354 is the second water storage groove, 36 is the push rod, 4 is the driving assembly, 41 is the motor, 42 is the transmission component, 421 is the driving gear, 422 is the driven gear, 423 is the transmission gear, 43 is the lead screw, 44 is the guide shaft, 45 is the second sliding block, 46 is the second linear potentiometer, 47 is the pressure sensor, 471 is the contact head. DETAILED DESCRIPTION
[0035] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. For ease of explanation, the terms "front," "rear," "positive," "negative," "left," "right," "top," "bottom," "upper," "lower," "inner," "outer," and "inner" in this utility model indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model or limitations on the actual orientation of the product or device during production, use, sales, etc. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Furthermore, in the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," and "composition," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0036] This invention provides a waterproof heparin pump that can be used for heparin infusion, with better sealing performance and superior waterproof effect.
[0037] like Figure 1 The diagram shown is a structural schematic of the waterproof heparin pump. Figure 2 , Figure 3 The diagram shows the usage state of the waterproof heparin pump. Specifically, the waterproof heparin pump includes a pump housing assembly 2, an injection assembly 3, and a drive assembly 4. The pump housing assembly 2 is used to fix the syringe 1. The injection assembly 3 is provided with a fixing component 31, through which the piston 11 on the syringe 1 can be fixed to the injection assembly 3. The drive assembly 4 provides driving force to drive the injection assembly 3 to move. Figure 4 As shown, the surface of the injection assembly 3 housing is provided with at least one mounting portion 32 for mounting the fixing component 31. The mounting portion 32 protrudes from the surface of the injection assembly 3 housing and is integrally formed with the surface of the injection assembly 3 housing. The fixing component 31 is inserted into the injection assembly 3 through the mounting portion 32. Specifically, the number of mounting portions 32 can be one, two or more, depending on the installation requirements of the fixing component 31, and is not limited here.
[0038] The waterproof heparin pump with the above structure can reduce the penetration of liquid medicine or other disinfectants for cleaning and disinfection into the inside of the bolus assembly 3 through the gap along the surface of the housing of the bolus assembly 3, improve the waterproof performance, and prevent the liquid medicine from leaking out of the bolus assembly 3.
[0039] In some embodiments, as shown in Figure 4 、 Figure 6 、 Figure 7 The mounting portion 32 is provided with a first mounting hole 321 in communication with the inner cavity of the housing of the bolus assembly 3 in the axial direction, and an annular step 322 is arranged on the end face of the mounting portion 32 in contact with the fixing component 31, and a sealing rubber ring 323 is sleeved on the outer side of the annular step 322.
[0040] The waterproof heparin pump with the above structure can reduce the penetration of liquid medicine or other disinfectants for cleaning and disinfection into the inside of the bolus assembly 3 through the gap along the surface of the housing of the bolus assembly 3, improve the waterproof performance, and prevent the liquid medicine from leaking out of the bolus assembly 3.
[0041] In some embodiments, the cross section of the sealing rubber ring 323 is in the shape of "D", and a threaded groove is arranged on the inner circumferential surface of the sealing rubber ring 323, and a thread is arranged on the outer circumferential surface of the annular step 322.
[0042] The waterproof heparin pump with the above structure can reduce the penetration of liquid medicine or other disinfectants for cleaning and disinfection into the inside of the bolus assembly 3 through the gap along the surface of the housing of the bolus assembly 3, improve the waterproof performance, and prevent the liquid medicine from leaking out of the bolus assembly 3.
[0043] In some embodiments, as shown in Figure 5 The fixing component 31 includes a left clamping part 31A and a right clamping part 31B, and the mounting part 32 on the push injection assembly 3 is correspondingly two, and the left clamping part 31A and the right clamping part 31B are inserted on the push injection assembly 3 through the mounting part 32; the left clamping part 31A and the right clamping part 31B can be opened and closed (i.e. close to or away from each other), and when the left clamping part 31A and the right clamping part 31B are closed, the end of the piston 11 on the syringe 1 can be clamped, and when the left clamping part 31A and the right clamping part 31B are opened, the clamping of the end of the piston 11 on the syringe 1 can be released.
[0044] The above structure of the waterproof heparin pump, through the left clamping part 31A and the right clamping part 31B inserted on the mounting part 32 to clamp the end of the piston 11 on the syringe 1, so that the piston 11 on the syringe 1 can be more stably and reliably fixed, and the waterproof performance is better.
[0045] In some embodiments, as shown in Figure 5 , Figure 6 The push injection assembly 3 includes a push-pull box 33, and the mounting part 32 is arranged on the push-pull box 33; as shown in Figure 8 The push-pull box 33 is provided with a second mounting hole 331 at the position in contact with the end surface of the piston 11, a touch switch 34 is mounted on the second mounting hole 331, which can be used to accurately detect the position of the piston 11 of the syringe 1 and confirm whether the syringe 1 is correctly installed in place; a sealing cap 35 is arranged on the surface of the touch switch 34, a first upturned edge 351 is arranged on the edge of the sealing cap 35, the outer edge of the first upturned edge 351 abuts against the inner wall of the second mounting hole 331, and the first upturned edge 351 forms a first water storage groove 352 with the opening upward.
[0046] The above structure of the waterproof heparin pump, when the push-pull box 33 is provided with a touch switch 34 in the opening, a sealing cap corresponding to the second mounting hole 331 is arranged on the surface of the touch switch 34 as a sealing structure, and a first upturned edge 351 is arranged on the edge of the sealing cap 35, the outer edge of the first upturned edge 351 abuts against the inner wall of the second mounting hole 331 to form a seal, and the first upturned edge 351 forms a first water storage groove 352 with the opening upward, which can prevent liquid from flowing into the push injection assembly 3 from the gap between the touch switch 34 and the push-pull box 33, thereby further enhancing the sealing performance of the waterproof heparin pump and improving the waterproof effect.
[0047] In some embodiments, as shown in Figure 8As shown, the bottom of the first upturned edge 351 is further provided with a second upturned edge 353, which is open upward and forms a sealed second water storage groove 354 with the inner wall of the shell of the push-pull box 33.
[0048] The waterproof heparin pump with the above structure can collect the liquid permeating from the gap between the sealed cap 35 and the push-pull box 33 and prevent the liquid from further flowing into the push-pull box 33, so as to achieve secondary waterproof between the touch switch 34 and the push-pull box 33, further improve the sealing of the waterproof heparin pump, and improve the waterproof effect.
[0049] In some embodiments, as shown in Figure 9 , Figure 10 As shown, the pump shell assembly 2 comprises a pump shell 21 and a pressing component 22; the bottom outer side of the pump shell 21 is provided with a V-shaped groove 211 open downward and suitable for the outer barrel of the syringe 1, and a recess 212 for placing the handle of the outer barrel of the syringe; the pressing component 22 can fix the syringe 1 in the V-shaped groove 211.
[0050] The waterproof heparin pump with the above structure can place the outer barrel of the syringe 1 in the V-shaped groove 211 of the bottom outer side of the pump shell 21, and then fix the syringe 1 in the V-shaped groove 211 through the pressing component 22, so that the fixing effect is better and the adaptability is stronger; at the same time, the horizontal installation of the syringe 1 can be ensured through the setting of the recess 212, the fixing effect is further improved, the reliability of the waterproof heparin pump can be improved, and the infusion effect is improved.
[0051] In some embodiments, as shown in Figure 11As shown, the pressing component 22 comprises a pressing block 221, a connecting rod 222, a first sliding block 223, a spring 224 and a first linear potentiometer 225; wherein the connecting rod 222 penetrates through the bottom of the pump shell 21, so that a part of the connecting rod 222 is located inside the pump shell 21 and a part of the connecting rod 222 is located outside the pump shell 21; the first sliding block 223 is fixedly arranged at the upper end of the connecting rod 222 and located inside the pump shell 21; the pressing block 221 is fixedly arranged at the lower end of the connecting rod 222 and located outside the pump shell 21; the spring 224 is sleeved on the outer sidewall of the connecting rod 222 and located inside the pump shell 21, and the bottom of the spring 224 abuts against the inner bottom surface of the pump shell 21; the first linear potentiometer 225 is fixed in the pump shell 21 and parallel to the connecting rod 222, and the first sliding block 223 is slidingly connected with the first linear potentiometer 225, that is, the first sliding block 223 can slide on the first linear potentiometer 225.
[0052] When the pressing block 221 is adjusted up and down to press the syringe 1, the first sliding block 223 is driven to slide on the first linear potentiometer 225 through the action of the connecting rod 222, so that the resistance value detected by the first linear potentiometer 225 changes correspondingly, and the outer diameter of the syringe 1 can be calculated through the change of the resistance value, so that the adaptability is better and the intelligent level is higher; in addition, the corresponding preset resistance value is different when the syringes 1 with different diameters are installed in place, if the detected resistance value does not match the preset resistance value, it can be judged that the syringe 1 is not installed in place, and the controller issues an alarm that the syringe 1 is not installed in place, so that the reliability of the waterproof heparin pump can be improved.
[0053] In some embodiments, the driving assembly 4 comprises a motor 41, a transmission component 42, a lead screw 43, a guide shaft 44 and a second sliding block 45; in the present embodiment, the driving assembly 4 is further provided with a support frame for supporting and mounting, which comprises a support main plate mounted on the bottom of the pump shell 21, an upper support plate on the right side wall of the pump shell 21 and a lower support plate on the left side wall of the pump shell 21. Of course, in actual application, the support frame is not necessary, and the motor 41, the transmission component 42, the lead screw 43, the guide shaft 44 and the second sliding block 45 can also be directly mounted in the pump shell 21 or supported and mounted by other components, which is not limited herein. In the present embodiment, the lead screw 43 and the guide shaft 44 are transversely and parallelly arranged between the upper support plate and the lower support plate, the guide shaft 44 is fixedly connected with the upper and lower support plates and cannot move, and the two ends of the lead screw 43 pass through the upper and lower support plates and are rotatably connected with the upper and lower support plates through bearings; the second sliding block 45 is threadedly connected with the lead screw 43 and movably sleeved on the guide shaft 44; the rotating shaft of the motor 41 is connected with the lead screw 43 through the transmission component 42, the lead screw 43 is driven to rotate by the motor 41 to drive the second sliding block 45 to move axially on the lead screw 43, and the second sliding block 45 is fixedly connected with the bolus injection assembly 3. Specifically, the transmission component 42 comprises a driving gear 421, a driven gear 422 and a transmission gear 423, wherein the driving gear 421 is fixed on the rotating shaft of the motor 41, the driven gear 422 is fixed on the first end (in the present embodiment, the right end) of the lead screw 43, and the transmission gear 423 is mounted on the upper support plate and located between and engaged with the driving gear 421 and the driven gear 422.
[0054] With the above structure of the waterproof heparin pump, the motor 41 drives the lead screw 43 to rotate, so that the second sliding block 45 moves axially on the lead screw 43, thereby driving the bolus injection assembly 3 fixedly connected with the second sliding block 45 to move, and the infusion of heparin is realized. In addition, the high-speed movement of the motor 41 can be converted into the low-speed high-torque movement of the lead screw 43 through the secondary gear transmission, the stability of the rotation of the lead screw 43 is improved, the secondary gear transmission has better speed adaptability, and the control precision can be improved.
[0055] In some embodiments, a motor speed measurement module is further mounted on the motor 41, which is electrically connected with the controller main plate and can accurately measure the rotating speed of the motor 41. If the rotating speed exceeds the warning value, an abnormal speed detection alarm is issued, so that the reliability of the waterproof heparin pump can be improved.
[0056] In some embodiments, the driving assembly 4 further comprises a second linear potentiometer 46; the second linear potentiometer 46 is parallel to the lead screw 43, and the second sliding block 45 is in sliding connection with the second linear potentiometer 46, that is, the second sliding block 45 can slide on the second linear potentiometer 46.
[0057] With the above structure of the waterproof heparin pump, when the second sliding block 45 moves axially on the lead screw 43, it will slide on the second linear potentiometer 46 at the same time, thereby changing the resistance value of the second linear potentiometer 46. By whether there is a large deviation between the distance slid by the second sliding block 45 in a unit of time and the expected setting distance, it can be detected whether the syringe 1 has a blockage phenomenon. For example, when the controller judges that the difference between the resistance values read at the previous and the next time is less than a set value, it is judged that the syringe 1 has a blockage, thereby improving the reliability of the waterproof heparin pump.
[0058] In some embodiments, the driving assembly 4 further comprises a pressure sensor 47, which is located at the second end (in this embodiment, the left end) of the lead screw 43; preferably, a contact head 471 is further arranged between the pressure sensor 47 and the second end of the lead screw 43.
[0059] With the above structure of the waterproof heparin pump, by arranging the pressure sensor 47 at the second end of the lead screw 43, through the interaction of force, the pressure on the piston 11 of the syringe 1 can be detected, thereby the syringe 1 can be detected whether it has been injected completely (after injection, the pressure increases), or whether it has been stuck during injection; by arranging the contact head 471 between the pressure sensor 47 and the second end of the lead screw 43, the thrust of the lead screw 43 can be used for transmission, and the rotary force can be filtered out, thereby the pressure sensor 47 can be prevented from being abraded.
[0060] The above embodiments are only preferred embodiments of the present application, and are not intended to limit the scope of the present application. Any equivalent changes made in shape, structure and principle according to the present application should be covered within the protection scope of the present application.
Claims
1. A waterproof heparin pump, characterized by, The utility model provides a kind of injection device, including pump shell assembly (2), bolus assembly (3) and drive assembly (4);The pump shell assembly (2) can be used to fix syringe (1);Fixed component (31) is provided on the bolus assembly (3), and it can be used to fix the piston (11) on the syringe (1);The drive assembly (4) can be used to drive the bolus assembly (3) to move;Specifically, the bolus assembly (3) shell surface is provided with at least one integral mounting portion (32), and the mounting portion (32) protrudes from the bolus assembly (3) shell surface, and the fixed component (31) is inserted into the bolus assembly (3) by the mounting portion (32).
2. The water-resistant heparin pump of claim 1, wherein, The mounting portion (32) is provided with a first mounting hole (321) communicated with the bolus assembly (3) shell cavity, and an annular step (322) is provided on the end surface of the mounting portion (32) in contact with the fixed component (31), and a sealing rubber ring (323) is sleeved outside the annular step (322);The fixed component (31) is provided with an insertion end (311) matched with the first mounting hole (321), and a downward flange is provided on the top of the insertion end (311), which is matched with the end surface of the mounting portion (32) and can be buckled on the end surface of the mounting portion (32).
3. The water-resistant heparin pump of claim 2, wherein, The cross section of the sealing rubber ring (323) is "D" shape, and a threaded groove is provided on the inner circumferential surface of the sealing rubber ring (323), and a thread matched with the threaded groove is provided on the outer circumferential surface of the annular step (322).
4. The water-resistant heparin pump of claim 1, wherein, The number of mounting portions (32) on the bolus assembly (3) is two;The fixed component (31) includes left clamping portion (31A) and right clamping portion (31B), and the left clamping portion (31A) and the right clamping portion (31B) are inserted into the bolus assembly (3) by the mounting portion (32);The left clamping portion (31A) and the right clamping portion (31B) can be opened and closed to clamp the end of the piston (11) on the syringe (1).
5. The water-resistant heparin pump of claim 1, wherein, The mounting portion (32) is provided on the push-pull box (33) of the bolus assembly (3), and a second mounting hole (331) is provided on the position of the push-pull box (33) in contact with the end surface of the piston (11), and a touch switch (34) is installed on the second mounting hole (331);A sealing cap (35) is provided on the surface of the touch switch (34), and a first upward flange (351) is provided on the edge of the sealing cap (35) and abuts against the inner wall of the second mounting hole (331), and the first upward flange (351) forms a first water storage groove (352) with the opening upward.
6. The water-resistant heparin pump of claim 5, wherein, A second upward flange (353) is provided on the bottom of the first upward flange (351), and a sealed second water storage groove (354) is formed between the second upward flange (353) and the inner wall of the shell of the push-pull box (33).
7. The heparin pump according to any one of claims 1 to 6, characterized in that The pump shell assembly (2) comprises a pump shell (21) and a pressing component (22); the bottom of the pump shell (21) is provided with a V-shaped groove (211) with an opening downward and a recess (212) for placing the handle of the syringe (1); the pressing component (22) can fix the syringe (1) in the V-shaped groove (211).
8. The water-resistant heparin pump of claim 7, wherein, The pressing component (22) comprises a pressing block (221), a connecting rod (222), a first sliding block (223), a spring (224) and a first linear potentiometer (225); the connecting rod (222) penetrates through the bottom of the pump shell (21), the first sliding block (223) and the pressing block (221) are fixedly arranged at the upper end and the lower end of the connecting rod (222) respectively, the spring (224) is sleeved on the outer sidewall of the connecting rod (222), and the bottom of the spring (224) abuts against the inner bottom surface of the pump shell (21); the first linear potentiometer (225) is fixed in the pump shell (21) and parallel to the connecting rod (222), and the first sliding block (223) and the first linear potentiometer (225) are slidingly connected.
9. The heparin pump of any one of claims 1 to 6, wherein The driving assembly (4) comprises a motor (41), a transmission component (42), a lead screw (43), a guide shaft (44) and a second sliding block (45); the transmission component (42) comprises a driving gear (421), a driven gear (422) and a transmission gear (423), the driving gear (421) is fixedly connected with the output end of the motor (41), the driven gear (422) is fixedly connected with the first end of the lead screw (43), and the transmission gear (423) is located between the driving gear (421) and the driven gear (422) and is engaged with the driving gear (421) and the driven gear (422); the lead screw (43) and the guide shaft (44) are arranged in parallel, the second sliding block (45) is threadedly connected with the lead screw (43), and the second sliding block (45) is movably sleeved on the guide shaft (44); the second sliding block (45) is fixedly connected with the push injection assembly (3).
10. The water-resistant heparin pump of claim 9, wherein, The driving assembly (4) further comprises a second linear potentiometer (46) and a pressure sensor (47); the second linear potentiometer (46) is parallel to the lead screw (43), and the second sliding block (45) and the second linear potentiometer (46) are slidingly connected; the pressure sensor (47) is located at the second end of the lead screw (43), and a contact head (471) is arranged between the pressure sensor (47) and the second end of the lead screw (43).