Angiography injection device with injection speed capable of being adjusted in self-adaptive mode

Abstract

The invention relates to the technical field of contrast injection, and particularly discloses a contrast injection device with injection speed self-adaptive adjustment, which comprises a frame body, the saline cylinder is used for containing normal saline; the radiography barrel is used for containing a contrast agent; the mixing cylinder is used for accommodating a contrast agent, normal saline or a mixed solution of the contrast agent and the normal saline; one end of the injection tube is connected with the mixing cylinder, and the other end of the injection tube is connected with a needle tube; the number of the connecting pipes is two, one connecting pipe is connected between the saline water cylinder and the mixing cylinder, the other connecting pipe is connected between the radiography cylinder and the mixing cylinder, and one-way valves are arranged on the connecting pipes and the injection pipe; the extrusion mechanism comprises a push plate and a driving assembly, the push plate is arranged in the mixing barrel in a sliding mode, and the driving assembly is used for driving the push plate to slide along the axis of the mixing barrel so that the solution in the mixing barrel can be discharged outwards or sucked into the solution in the saline barrel and the radiography barrel. The injection process can be simplified.

Description

Technical Field

[0001] The present application relates to the technical field of contrast injection, and in particular to a contrast injection device with adaptively adjusted injection speed. Background Art

[0002] At present, in the process of medical imaging examination, especially in CT enhanced scanning, angiography and other projects, it is necessary to inject contrast agents into the patient's body to improve the image contrast. Contrast agents, also known as contrast agents, are chemicals injected into human tissues or organs to enhance the image observation effect. The density of these products is higher or lower than that of the surrounding tissues, and the contrast formed can be used to display images with certain instruments. Contrast agents are one of the most commonly used drugs in interventional radiology operations, mainly used for the display of blood vessels and body cavities.

[0003] Usually, the contrast agent is injected through a contrast agent injection device, which includes a frame, a cylinder, a three-way valve and a needle. The cylinder is arranged on the frame, and two cylinders are arranged, one for storing contrast agent and the other for storing saline solution. A push rod is arranged inside the cylinder for sliding, and when the push rod slides, the external liquid medicine can be sucked in or the liquid medicine in the cylinder can be pushed out under the action of negative pressure. The three-way valve is connected between the two cylinders, and the other end of the three-way valve is connected to the needle, so that contrast agent, saline solution or a mixture of contrast agent and saline solution can be injected into the human body as needed.

[0004] When injecting a mixture of contrast agent and saline, the contrast agent and saline need to be mixed outside first, and additional containers and stirring rods are needed for mixing. After mixing, the mixture is injected into one of the cylinders and then injected. The process is relatively cumbersome and needs to be further optimized. Summary of the invention

[0005] In order to simplify the injection process, the present application provides a contrast injection device with adaptive adjustment of injection speed.

[0006] The present application provides a contrast injection device with adaptive injection speed adjustment, which adopts the following technical solution: A contrast injection device with adaptive injection speed adjustment, comprising: A frame; and a A saline cylinder for containing normal saline; A contrast cylinder, used for containing contrast medium; A mixing cylinder, used for containing contrast medium, saline or a mixture of contrast medium and saline; An injection tube, one end of which is connected to the mixing cylinder, and the other end of which is connected to a needle tube; Two connecting tubes are provided, one of which is connected between the saline cylinder and the mixing cylinder, and the other is connected between the contrast cylinder and the mixing cylinder, and both the connecting tube and the injection tube are provided with a one-way valve; The extrusion mechanism includes a push plate and a driving assembly. The push plate is slidably arranged in the mixing cylinder. The driving assembly is used to drive the push plate to slide along the axis of the mixing cylinder to discharge the solution in the mixing cylinder or to absorb the solution in the saline cylinder and the contrast cylinder.

[0007] By adopting the above technical solution, when the push plate slides, under the action of negative pressure, the saline in the saline cylinder and the contrast agent in the contrast cylinder can be sucked into the mixing cylinder, so that the saline and the contrast agent can be mixed in the mixing cylinder, thereby avoiding the use of additional containers, thereby improving work efficiency and reducing operational complexity.

[0008] Optionally, each of the connecting pipes is provided with a shutoff valve for controlling the opening and closing of the connecting pipe.

[0009] By adopting the above technical solution, when it is necessary to inject physiological saline and contrast agent in sequence, the isolation valve can isolate the connecting tube, which helps to smoothly carry out the solution injection process; therefore, the device can not only be used to inject a mixture of physiological saline and contrast agent, but also can inject physiological saline and contrast agent in sequence, and has stronger applicability.

[0010] Optionally, the driving assembly includes a rotating power part, a screw, a connecting block and a support rod, the rotating power part is arranged on a frame, the screw is coaxially fixedly connected to the output end of the rotating power part, the connecting block is slidably arranged on the frame along the axis direction of the screw, the connecting block is threadedly connected to the screw, the support rod is arranged on the connecting block, and the support rod is fixedly connected to the push plate.

[0011] By adopting the above technical solution, the rotating power part drives the screw to rotate, and the rotation of the screw causes the connecting block to slide. The connecting block can drive the push plate to slide along the axis of the mixing barrel through the support rod, thereby realizing the suction and discharge of the solution in the mixing barrel; since one set of driving components can realize the injection of contrast agent, saline or a mixture of the two, it helps to simplify the structure and reduce the cost of the device.

[0012] Optionally, the rotating power component is a servo motor, a pressure sensor is provided in the injection tube, and the pressure sensor is electrically connected to the servo motor.

[0013] By adopting the above technical solution, the injection speed can be automatically adjusted according to the pressure change in the injection tube, realizing adaptive adjustment of the injection speed, thereby improving the safety of the injection process.

[0014] Optionally, the support rod includes a fixed rod and a movable rod, the fixed rod is fixedly set on the connecting block, the movable rod is coaxially connected to the fixed rod, the push plate is fixedly connected to the movable rod, the push plate is provided with a stirring member, the outer wall of the movable rod is provided with an external thread, the frame is provided with a mounting block, the mounting block is provided with a threaded hole matching the external thread, the movable rod is threadedly connected to the threaded hole, so that the movable rod can rotate around its own axis while sliding with the fixed rod.

[0015] By adopting the above technical solution, the movable rod can rotate around its own axis while the fixed rod slides, that is, the push plate can rotate while sliding, thereby driving the stirring member to rotate, so that the internal solution can be stirred while the mixing cylinder is inhaling or discharging the solution, so that the physiological saline and contrast agent in the mixing cylinder are mixed more evenly, which helps to enhance the imaging effect after subsequent injection; since the process of inhaling and discharging the solution and the stirring process are carried out simultaneously, time loss can be reduced, which helps to improve work efficiency.

[0016] Optionally, the stirring member includes a stirring rod, and a mounting hole is opened on the push plate. The axis of the mounting hole is parallel to the sliding direction of the push plate, and the stirring rod is movably inserted into the mounting hole.

[0017] By adopting the above technical solution, when the push plate slides, the push plate can slide relative to the stirring rod. Since the push plate rotates at the same time, the push plate can drive the stirring rod to rotate, thereby stirring the solution in the mixing barrel and accelerating the mixing of the solution.

[0018] Optionally, the stirring member includes a stirring blade, and the stirring blade is provided in plurality and arranged in a circular array, and the stirring blade is provided with a plurality of through holes for liquid to pass through.

[0019] By adopting the above technical solution, the perforated design allows the solution to flow smoothly during the stirring process, which reduces the rotation resistance of the stirring blade and helps to enhance the stirring effect, thereby improving the mixing efficiency and reducing the time required for mixing.

[0020] Optionally, a shielding assembly is provided at the perforation on the stirring blade, and the shielding assembly includes a block and an elastic rope. The block is slidably provided on one side of the perforation, and the block is used to close the perforation. The elastic rope is fixedly connected between the inner wall of the perforation and the block.

[0021] By adopting the above technical scheme, when the push plate slides to make the solution be sucked into the mixing barrel, the push plate rotates in one direction. At this time, under the action of the resistance of the solution, the block can slide to the outside of the perforation, so that the perforation is in an open state, and the stirring and mixing effect of the stirring blade on the solution can be enhanced; when the push plate slides to make the solution in the mixing barrel squeezed out, the push plate rotates in the opposite direction. At this time, under the action of the resistance of the solution and the restoring force of the elastic rope, the block can slide to a state of being against the inner wall of the perforation, and the block closes the perforation. Therefore, the rotation of the stirring blade can drive the solution in each area to rotate, and the mixing between the solutions on both sides of the same stirring blade is weakened, thereby weakening the stirring effect of the stirring blade on the solution, thereby avoiding excessive stirring amplitude during the injection of the drug solution into the human body, causing discomfort to the human body.

[0022] Optionally, the stopper is in a frustum-shaped form, and the inner wall of the perforation is in a frustum-shaped form that matches the stopper.

[0023] By adopting the above technical solution, when the stopper is pressed against the inner wall of the perforation, the provision of the frustum helps to enhance the sealing of the pressing point, and helps to ensure the sealing effect of the stopper on the perforation.

[0024] Optionally, scale lines are provided on both the saline cylinder and the contrast cylinder.

[0025] By adopting the above technical solution, the scale lines set on the saline cylinder and the contrast agent cylinder can intuitively display the capacity of the saline and contrast agent, making it convenient for medical staff to accurately grasp the usage amount, thereby ensuring the accuracy of each injection dose.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The setting of the mixing cylinder provides a mixing space for the physiological saline and the contrast agent, so the device can be used not only for the injection of the contrast agent, but also for the injection of the mixed solution of the contrast agent and the physiological saline, and has a stronger applicability.

[0027] 2. After the two isolating valves close the corresponding connecting pipes in turn, each time the push plate slides to the side away from the injection tube, only saline or contrast agent is sucked into the mixing cylinder, thereby achieving the sequential injection of saline and contrast agent, further improving the applicability of the device.

[0028] 3. The push plate can rotate during the sliding process, and the push plate drives the stirring member to rotate, thereby stirring the solution in the mixing cylinder, which helps to enhance the mixing effect of the solution and thus improve the imaging quality after injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 is a cross-sectional view of Example 1 of the present application; Figure 3 is a schematic diagram of the structure of the driving component in Example 1 of the present application; Figure 4 This is a structural schematic diagram of Example 2 of the present application for showing the installation position of the stirring blade; Figure 5 is a cross-sectional view of the stirring blade in Example 2 of the present application; Figure 6 is a cross-sectional view of Example 3 of the present application for illustrating a shielding component; Figure 7 It is a schematic diagram of the structure after the stopper slides out in Example 3 of the present application.

[0030] 1. Mounting bracket; 2. Support leg; 121. Roller; 13. Mounting bracket; 2. Base; 3. Saline cylinder; 4. Contrast cylinder; 5. Mixing cylinder; 6. Injection tube; 61. Needle tube; 7. Connecting tube; 71. One-way valve; 72. Isolation valve; 8. Push plate; 81. Mounting hole; 82. Strip hole; 9. Driving assembly; 91. Servo motor; 92. Screw; 93. Connecting block; 94. Support rod; 941. Fixed rod; 9411. Mounting groove; 942. Movable rod; 9421. Connecting cylinder; 10. Stirring rod; 14. Stirring blade; 141. Perforation; 15. Limiting rod; 16. Mounting block; 17. Shielding assembly; 171. Block; 172. Elastic rope; 18. Scale line. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-7 This application is described in further detail.

[0032] Example 1 The embodiment of the present application discloses a contrast injection device with adaptive injection speed adjustment. Figure 1 The contrast injection device with adaptive injection speed adjustment includes a frame 1, which includes a mounting seat 11, a leg 12 and a mounting frame 13. The mounting seat 11 is vertically arranged in the height direction; the leg 12 is fixedly connected to the bottom wall of the mounting seat 11, and the leg 12 is provided with a plurality of legs and arranged in a circular array; the end of the leg 12 is provided with a roller 121 to facilitate the movement of the device. The mounting frame 13 is arranged on the top of the mounting seat 11, and the mounting frame 13 mainly plays a supporting role.

[0033] The mounting frame 13 is rotatably connected to the base 2, and the base 2 and the mounting frame 13 are connected by a damping connection, so that the base 2 can be rotated to a desired position as needed. The base 2 is provided with a saline cylinder 3, a contrast cylinder 4 and a mixing cylinder 5. The saline cylinder 3 and the contrast cylinder 4 are both cylindrical structures, and one end of the saline cylinder 3 and the contrast cylinder 4 is fixedly connected to the base 2. The saline cylinder 3 and the contrast cylinder 4 are both provided with a liquid inlet and an exhaust port, and a screw cap is provided at the liquid inlet, so that it is convenient to inject physiological saline or contrast agent after unscrewing the screw cap; the exhaust port is provided to facilitate the smooth inflow and outflow of the solution. The saline cylinder 3 and the contrast cylinder 4 are both provided with scale lines 18, so it is convenient to observe the amount of solution inside. The mixing cylinder 5 is also fixedly connected to the base 2, and the mixing cylinder 5 is a closed cylindrical structure.

[0034] The mixing barrel 5 is fixedly connected with a connecting tube 7 and an injection tube 6, and both the connecting tube 7 and the injection tube 6 are hoses. Two connecting tubes 7 are provided, and one end of the two connecting tubes 7 is connected to the interior of the mixing barrel 5, wherein one end of the connecting tube 7 away from the mixing barrel 5 is connected to the interior of the saline barrel 3, and the other end of the connecting tube 7 away from the mixing barrel 5 is connected to the interior of the contrast barrel 4. Both connecting tubes 7 are provided with a one-way valve 71, and the flow direction in the one-way valve 71 on the connecting tube 7 is the direction of flow toward the mixing barrel 5. One end of the injection tube 6 is connected to the interior of the mixing barrel 5, and the other end of the injection tube 6 is fixedly connected with a needle tube 61, and the needle tube 61 is used to be inserted into the human body. Therefore, the solution in the saline barrel 3 or the contrast barrel 4 can enter the mixing barrel 5 through the connecting tube 7, and then the solution in the mixing barrel 5 can flow into the human body along the injection tube 6 and the needle tube 61, thereby realizing the injection of the contrast agent. Among them, a one-way valve 71 is also provided on the injection tube 6. The flow direction in the one-way valve 71 on the injection tube 6 is from the mixing cylinder 5 to the needle tube 61. Therefore, the setting of the one-way valve 71 on the injection tube 6 enables the solutions in the saline cylinder 3 and the contrast cylinder 4 to be more smoothly sucked into the mixing cylinder 5.

[0035] Further, each connecting pipe 7 is provided with a cut-off valve 72, which can be a ball valve, a plug valve or a stop valve, and the cut-off valve 72 is used to control the opening and closing of the corresponding connecting pipe 7. When the cut-off valve 72 on the connecting pipe 7 close to one side of the saline cylinder 3 is closed, and the other cut-off valve 72 is opened, only the contrast agent in the contrast cylinder 4 can flow into the mixing cylinder 5, and then the contrast agent is injected separately. When the cut-off valve 72 on the connecting pipe 7 close to one side of the contrast cylinder 4 is closed, and the other cut-off valve 72 is opened, only the saline in the saline cylinder 3 can flow into the mixing cylinder 5, and then the saline is injected separately. Therefore, the setting of the cut-off valve 72 enables the present device not only to inject the mixed solution of saline and contrast agent into the human body, but also to perform the sequential intermittent injection of saline and contrast agent, and thus can be applied to more situations.

[0036] Reference Figure 2 and Figure 3 , an extrusion mechanism is also provided on one side of the mixing barrel 5, and the extrusion mechanism includes a push plate 8 and a drive assembly 9. The push plate 8 is a circular plate adapted to the cross-sectional shape of the mixing barrel 5, and the diameter of the push plate 8 is the same as the inner wall diameter of the mixing barrel 5, so that the circumference of the push plate 8 abuts against the inner wall of the mixing barrel 5; the push plate 8 is slidably provided in the mixing barrel 5 along the axial direction of the mixing barrel 5. The drive assembly 9 is provided on one side of the push plate 8, and is used to drive the push plate 8 to slide.

[0037] The driving assembly 9 includes a rotating power part, a screw 92, a connecting block 93 and a support rod 94. The rotating power part is a servo motor 91, which is fixedly connected to the base 2. The screw 92 is coaxially fixedly connected to the output shaft of the servo motor 91. The connecting block 93 is slidably arranged on the base 2 along the length direction of the screw 92; a limit rod 15 parallel to the screw 92 is fixedly connected to the base 2, and the connecting block 93 is slidably penetrated on the limit rod 15, so that the connecting block 93 is slidably connected to the base 2. A threaded hole matching the screw 92 is provided on the connecting block 93, and the connecting block 93 is threadedly connected to the screw 92. The thread lead angle of the external thread on the screw 92 is less than the equivalent friction angle, so the threaded connection between the screw 92 and the connecting block 93 has a self-locking ability. The support rod 94 is parallel to the screw 92, and one end of the support rod 94 is fixedly connected to the connecting block 93; the end of the support rod 94 away from the connecting block 93 is fixedly connected to the push plate 8.

[0038] Therefore, after the servo motor 91 is started, the screw 92 can be rotated, and under the guiding effect of the limit rod 15 on the connecting block 93, the rotation of the screw 92 can make the connecting block 93 slide, and the connecting block 93 drives the push plate 8 to slide through the support rod 94; when the push plate 8 slides to the side away from the injection tube 6, due to the effect of negative pressure, the physiological saline in the saline cylinder 3 and the contrast agent in the contrast cylinder 4 will be sucked into the mixing cylinder 5; when the push plate 8 slides to the side close to the injection tube 6, the push plate 8 can squeeze out the solution in the mixing cylinder 5, thereby injecting the solution in the mixing cylinder 5 into the human body.

[0039] Among them, a pressure sensor for detecting the internal liquid pressure is provided in the injection tube 6, and a controller is provided in the base 2. The controller is electrically connected to the pressure sensor and the servo motor 91 respectively, so that the pressure sensor can transmit the liquid pressure at the end to the controller in time. When the liquid pressure is too high, the controller will reduce the output shaft speed of the servo motor 91, thereby reducing the injection pressure and ensuring the safety of the injection process.

[0040] The support rod 94 includes a fixed rod 941 and a movable rod 942. One end of the fixed rod 941 is fixedly connected to the connecting block 93, and the end of the fixed rod 941 away from the connecting block 93 is coaxially provided with a mounting groove 9411; the mounting groove 9411 is a cylindrical groove, and the diameter of the mounting groove 9411 is the same as the rod diameter of the movable rod 942. One end of the movable rod 942 is inserted into the mounting groove 9411, and the movable rod 942 and the cylindrical groove are rotatably connected. The end of the movable rod 942 away from the fixed rod 941 penetrates into the mixing barrel 5 and is fixedly connected to the push plate 8.

[0041] A connecting tube 9421 is fixedly arranged on the outer wall of the movable rod 942, and an external thread is arranged on the outer wall of the connecting tube 9421; a mounting block 16 is fixedly connected to the base 2, and a threaded hole matching the external thread on the connecting tube 9421 is provided on the mounting block 16, and the threaded hole on the mounting block 16 is threadedly connected to the outer wall of the connecting tube 9421. The thread lead angle of the external thread on the connecting tube 9421 is greater than the equivalent friction angle, so the threaded connection between the connecting tube 9421 and the threaded hole on the mounting block 16 does not have a self-locking ability. When the servo motor 91 is started, it can drive the connecting block 93 to slide, the connecting block 93 drives the fixed rod 941 to slide, and the fixed rod 941 drives the movable rod 942 to slide. Under the threaded cooperation between the connecting tube 9421 on the outer wall of the movable rod 942 and the mounting block 16, the movable rod 942 can rotate around its own axis when sliding, that is, the push plate 8 can rotate during the sliding process.

[0042] Reference Figure 2 , a stirring member is provided on the push plate 8, and the stirring member includes a plurality of stirring rods 10. A mounting hole 81 is provided on the push plate 8, and the axis of the mounting hole 81 is parallel to the axis of the push plate 8; a plurality of mounting holes 81 are provided and evenly spaced, and each mounting hole 81 corresponds to a stirring rod 10. The hole diameter of the mounting hole 81 is the same as the rod diameter of the stirring rod 10, and the stirring rod 10 is inserted into the corresponding mounting hole 81, so that the push plate 8 can slide relative to the stirring rod 10. Therefore, when the push plate 8 rotates, the stirring rod 10 can be driven to rotate, so that the solution in the mixing barrel 5 is stirred by the stirring rod 10, which helps to accelerate the mixing of the solution.

[0043] The implementation principle of Example 1 is as follows: first, the physiological saline and contrast agent are injected into the corresponding saline cylinder 3 and contrast agent cylinder 4 respectively. Then, both isolation valves 72 are in the open state. The servo motor 91 is started, and the servo motor 91 drives the screw 92 to rotate. The rotation of the screw 92 causes the connecting block 93 to slide, and the connecting block 93 drives the fixed rod 941 to slide, and the fixed rod 941 drives the movable rod 942 to slide; the movable rod 942 slides to the side away from the injection tube 6, so that the physiological saline in the saline cylinder 3 and the contrast agent in the contrast agent cylinder 4 can be sucked into the mixing cylinder 5 for preliminary mixing. Under the threaded connection between the connecting cylinder 9421 and the mounting block 16, the movable rod 942 can rotate while sliding, so that the push plate 8 can rotate while sliding, and the push plate 8 drives the stirring rod 10 to rotate, so that the mixed solution is stirred in the process of sucking the solution into the mixing chamber, which helps to enhance the mixing effect, thereby improving the subsequent imaging quality.

[0044] Then the output shaft of the servo motor 91 rotates in the opposite direction, causing the push plate 8 to slide toward the side close to the injection tube 6. Then the push plate 8 can squeeze out the mixed liquid in the mixing cylinder 5. The squeezed mixed liquid can be injected into the human body through the injection tube 6 and the needle 61, thereby realizing the injection of the mixed liquid of physiological saline and contrast agent.

[0045] Example 2 Reference Figure 4 and Figure 5 The difference between this embodiment and embodiment 1 is that the stirring member in this embodiment includes a plurality of stirring blades 14, and the stirring blades 14 are arranged in a circular array. A plurality of strip holes 82 are provided on the push plate 8, each of which corresponds to a stirring blade 14. The stirring blade 14 slides through the corresponding strip hole 82, so that the push plate 8 can slide relative to the stirring blade 14; because the stirring blade 14 abuts against the inner wall of the strip hole 82, the stirring blade 14 can be driven to rotate when the push plate 8 rotates. Since the stirring blade 14 has a larger area, it can be more fully in contact with the mixed liquid, which helps to enhance the stirring effect.

[0046] Each stirring blade 14 is provided with a plurality of through holes 141. Since part of the solution in the mixing barrel 5 can pass through the through holes 141, the vortex of the liquid can be enhanced, which helps to further enhance the mixing effect of the physiological saline and the contrast agent.

[0047] Example 3 Reference Figure 6 and Figure 7 The difference between this embodiment and embodiment 2 is that a shielding component 17 for adjusting the opening and closing of the through-hole 141 is provided on the stirring blade 14 in this embodiment, and the shielding component 17 is provided with multiple groups. The number of shielding components 17 is the same as the number of through-holes 141, and each group of shielding components 17 corresponds to one through-hole 141.

[0048] The shielding assembly 17 includes a stopper 171 and an elastic rope 172. The stopper 171 is truncated cone-shaped, and the stopper 171 is slidably arranged on one side of the through hole 141 of the stirring blade 14. A rope hole is provided on the stirring blade 14, and the rope hole is a hole that passes through the stirring blade 14. There are two rope holes, which are respectively located on both sides of the through hole 141. The elastic rope 172 has elastic force, and can be restored to its original length after being stretched and losing the effect of external force; there are two elastic ropes 172, which are respectively passed through the two rope holes. One end of the elastic rope 172 is fixedly connected to the end of the rope hole, and the other end of the elastic rope 172 is fixedly connected to the truncated cone surface of the stopper 171 after passing through the rope hole. Under normal conditions, the elastic rope 172 is at its original length, and at this time, the stopper 171 is against the inner wall of the through hole 141, and the through hole 141 is in a closed state. When the stopper 171 slides out of the through hole 141 , the elastic rope 172 is in a stretched state, and the through hole 141 is in an open state.

[0049] Therefore, when the output shaft of the servo motor 91 rotates in the forward direction, the push plate 8 slides toward the side away from the injection tube 6 to suck the solution into the mixing barrel 5; while the push plate 8 slides, the push plate 8 will rotate in one direction, and the rotation of the push plate 8 will drive the stirring blade 14 to rotate. Under the resistance of the liquid in the mixing barrel 5, the block 171 will overcome the elastic force of the elastic rope 172 and slide toward the outside of the perforation 141. At this time, the perforation 141 is in an open state, thereby helping to enhance the stirring effect of the stirring blade 14 on the solution in the mixing barrel 5.

[0050] After the required solution is sucked into the mixing cylinder 5 , the output shaft of the servo motor 91 stops rotating, and the elastic rope 172 causes the stopper 171 to slide toward the side close to the through hole 141 until the stopper 171 abuts against the inner wall of the through hole 141 , thereby closing the through hole 141 .

[0051] When the output shaft of the servo motor 91 rotates in the opposite direction, the push plate 8 slides toward the side close to the injection tube 6 to squeeze out the solution in the mixing barrel 5; while the push plate 8 slides, it rotates in the other direction, and the rotation of the push plate 8 drives the stirring blade 14 to rotate. Since the stopper 171 is arranged in a truncated cone shape, the stopper 171 will continue to press against the inner wall of the perforation 141 to close the perforation 141; therefore, in the process of injecting the solution in the mixing barrel 5 into the human body, the stirring process in the mixing barrel 5 is weakened, which can avoid the strong eddy current causing discomfort to the human body during the injection process, and help to ensure the safety of the injection process.

[0052] The above are optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A contrast injection device with adaptive injection speed adjustment, characterized in that: include: Frame (1); and a A saline cylinder (3) for containing physiological saline; A contrast agent tube (4) for containing contrast agent; A mixing cylinder (5) for containing a contrast medium, a saline solution, or a mixture of a contrast medium and a saline solution; An injection tube (6), one end of the injection tube (6) being connected to the mixing cylinder (5), and the other end of the injection tube (6) being connected to a needle tube (61); Two connecting tubes (7) are provided, one of which is connected between the saline cylinder (3) and the mixing cylinder (5), and the other of which is connected between the contrast cylinder (4) and the mixing cylinder (5). Both the connecting tube (7) and the injection tube (6) are provided with a one-way valve (71); The extrusion mechanism comprises a push plate (8) and a drive assembly (9), wherein the push plate (8) is slidably arranged in a mixing cylinder (5), and the drive assembly (9) is used to drive the push plate (8) to slide along the axis of the mixing cylinder (5), so that the solution in the mixing cylinder (5) is discharged outward or the solution in the saline cylinder (3) and the contrast cylinder (4) is sucked in.

2. The contrast injection device with adaptive injection speed adjustment according to claim 1, characterized in that: Each of the connecting pipes (7) is provided with a shutoff valve (72) for controlling the opening and closing of the connecting pipe (7).

3. The contrast injection device with adaptive injection speed adjustment according to claim 1, characterized in that: The driving assembly (9) comprises a rotating power member, a screw rod (92), a connecting block (93) and a support rod (94); the rotating power member is arranged on the frame (1); the screw rod (92) is coaxially fixedly connected to the output end of the rotating power member; the connecting block (93) is slidably arranged on the frame (1) along the axis direction of the screw rod (92); the connecting block (93) is threadedly connected to the screw rod (92); the support rod (94) is arranged on the connecting block (93); and the support rod (94) is fixedly connected to the push plate (8).

4. The contrast injection device with adaptive injection speed adjustment according to claim 3, characterized in that: The rotating power part is a servo motor (91), and a pressure sensor is arranged in the injection tube (6), and the pressure sensor is electrically connected to the servo motor (91).

5. The contrast injection device with adaptive injection speed adjustment according to claim 3, characterized in that: The support rod (94) comprises a fixed rod (941) and a movable rod (942), wherein the fixed rod (941) is fixedly arranged on the connecting block (93), and the movable rod (942) is coaxially rotatably connected to the fixed rod (941), and the push plate (8) is fixedly connected to the movable rod (942), and a stirring member is arranged on the push plate (8). An external thread is arranged on the outer wall of the movable rod (942), and a mounting block (16) is arranged on the mounting block (16), and a threaded hole matching the external thread is opened on the mounting block (16), and the movable rod (942) is threadedly connected to the threaded hole, so that the movable rod (942) can rotate around its own axis while sliding with the fixed rod (941).

6. The contrast injection device with adaptive injection speed adjustment according to claim 5, characterized in that: The stirring member comprises a stirring rod (10), the push plate (8) is provided with a mounting hole (81), the axis of the mounting hole (81) is parallel to the sliding direction of the push plate (8), and the stirring rod (10) is movably inserted into the mounting hole (81).

7. The contrast injection device with adaptive injection speed adjustment according to claim 5, characterized in that: The stirring member comprises a stirring blade (14), wherein a plurality of the stirring blades (14) are provided and arranged in a circular array, and a plurality of through holes (141) for liquid to pass through are formed on the stirring blade (14).

8. The contrast injection device with adaptive injection speed adjustment according to claim 7, characterized in that: A shielding assembly (17) is provided on the stirring blade (14) at the through hole (141), the shielding assembly (17) comprising a stopper (171) and an elastic rope (172), the stopper (171) being slidably disposed on one side of the through hole (141), the stopper (171) being used to close the through hole (141), and the elastic rope (172) being fixedly connected between the inner wall of the through hole (141) and the stopper (171).

9. The contrast injection device with adaptive injection speed adjustment according to claim 8, characterized in that: The stopper (171) is in the shape of a truncated cone, and the inner wall of the through hole (141) is in the shape of a truncated cone surface that matches the stopper (171).

10. The contrast injection device with adaptive injection speed adjustment according to claim 1, characterized in that: The saline cylinder (3) and the contrast cylinder (4) are both provided with scale lines (18).

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