A roller extrusion device for roller type high pressure syringe

Abstract

The present invention discloses a roller extrusion device for a roller-type high-pressure injector, which relates to an injection mechanism of a high-pressure injector, and solves the technical problem that the current electric injection has a large number of consumables. It includes a driving mechanism and an extrusion roller; the driving mechanism is installed in the high-pressure injector, the extrusion roller is rotatably installed on a support plate, and the driving end of the driving mechanism is connected to the extrusion roller; an extrusion plate for extruding the injection pipe with the extrusion roller is slidably installed on the support plate below the extrusion roller, and a positioning plate is slidably installed on the support plate below the extrusion plate, and the positioning plate is elastically connected to the extrusion plate; a lifting assembly for lifting and lowering the positioning plate and the extrusion plate is installed on the support plate below the positioning plate. The present invention is convenient and fast to operate, practical and reliable, and not only solves the problem of many consumables, but also can effectively protect the injection pipe, greatly improving the reliability of the high-pressure injector.

Description

Technical Field

[0001] The present invention relates to an injection mechanism of a high-pressure syringe, and more particularly to a roller squeezing device for a roller-type high-pressure syringe. Background Art

[0002] As an auxiliary device in the radiological diagnosis and treatment system, the high-pressure injector is gradually used in clinical practice with the development of technologies such as X-ray, fast film changer, image intensifier and artificial contrast agent. The basic function of the high-pressure injector is to quickly and accurately inject a sufficient amount of high-concentration X-ray contrast agent into the examination site, so as to perform diagnostic imaging and treatment on the lesion site. In order to achieve rapid injection, most of the current injection mechanisms are electric injection. That is, the motor is installed on the syringe, and the driving end of the motor is connected to the push rod; the syringe is installed on the support plate of the high-pressure injector, and the support plate is installed on the bottom plate of the high-pressure injector to achieve the installation of the syringe. During injection, the injection agent is first added to the syringe, and then the motor drives the push rod to push the injection agent so that the injection agent is quickly delivered. However, both the syringe and the push rod are disposable consumables, so they will be directly discarded as medical waste after use. Therefore, it is urgent to design an injection mechanism to replace the electric injection mechanism, which can quickly deliver the injection agent while solving the problem of more consumables. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a roller extrusion device for a roller high-pressure injector in view of the deficiencies in the prior art, thereby solving the problem of more consumables in the current electric injection.

[0004] The roller extrusion device for a roller-type high-pressure syringe described in the present invention comprises a driving mechanism and an extrusion roller; the driving mechanism is installed in the high-pressure syringe, the extrusion roller is rotatably installed on a support plate, and the driving end of the driving mechanism is connected to the extrusion roller; an extrusion plate for extruding an injection pipe together with the extrusion roller is slidably installed on the support plate below the extrusion roller, a positioning plate is slidably installed on the support plate below the extrusion plate, and the positioning plate is elastically connected to the extrusion plate; a lifting component for lifting and lowering the positioning plate and the extrusion plate is installed on the support plate below the positioning plate.

[0005] A matching gap is provided between the extrusion plate and the positioning plate, a plurality of springs are provided in the matching gap, a gap adjustment component extending into the extrusion plate is provided in the positioning plate, and the positioning plate is movably connected to the gap adjustment component.

[0006] The gap adjustment assembly includes a screw and a locking nut; the screw is movably inserted in the positioning plate, one end of the screw extends into the matching gap and is threadedly connected to the extrusion plate, and the other end of the screw extends to the bottom of the positioning plate and is threadedly connected to the locking nut.

[0007] A reversing nut is screwed onto the screw rod below the locking nut.

[0008] The lifting assembly comprises a handle and a cam; the handle is rotatably mounted on the side wall of the support plate, the cam is mounted on the handle, and the cam is in contact with and connected to the positioning plate.

[0009] The extrusion plate is provided with an arc-shaped extrusion groove, and the extrusion roller is inserted into the arc-shaped extrusion groove.

[0010] The extrusion roller includes a wheel disc and multiple extrusion wheels; the wheel disc is rotatably mounted on the side wall of the support plate, the wheel disc is connected to the driving end of the driving mechanism, the multiple extrusion wheels are rotatably mounted on the side of the wheel disc away from the support plate, a positioning pre-pressing wheel is provided between two adjacent extrusion wheels, and the positioning pre-pressing wheel is rotatably connected to the wheel disc.

[0011] A positioning ring groove with an arc-shaped cross section is provided on the side wall of the positioning pre-pressing wheel, and the depth of the positioning ring groove is smaller than the diameter of the injection pipe.

[0012] The roller extrusion device also includes a controller; an encoder is installed at the driving end of the driving mechanism, and the encoder and the driving mechanism are both electrically connected to the controller.

[0013] The driving mechanism includes a driving motor, a synchronous belt and a mounting seat; the driving motor is mounted on the base plate, a first synchronous wheel is mounted on the driving end of the driving motor, the mounting seat is mounted on the side wall of the support plate, a rotating shaft is rotatably mounted in the mounting seat, a second synchronous wheel is mounted in the rotating shaft, and the first synchronous wheel is connected to the second synchronous wheel through a synchronous belt; one end of the rotating shaft is connected to the extrusion roller through a flat key, and the other end of the rotating shaft is connected to the encoder.

[0014] Beneficial Effects

[0015] The advantages of the present invention are:

[0016] 1. Through the squeezing roller and the squeezing plate, the injection in the injection pipe is pushed quickly. Since the pushing point is transferred to the injection pipe, the input end can be directly connected to the injection bottle without transferring it to the syringe, thus solving the consumables problem of the syringe and the push rod. The squeezing plate is elastically connected to the positioning plate, so that the squeezing plate has a certain displacement, thereby avoiding the problem of excessive squeezing of the injection pipe when the squeezing plate is fixed and installed, causing the injection pipe to be deformed or broken, playing a role in protecting the injection pipe and greatly improving the reliability of the roller squeezing device.

[0017] 2. The extrusion plate and the positioning plate are both slidably mounted on the support plate, and a lifting assembly is provided under the positioning plate. The lifting and lowering of the extrusion plate and the positioning plate are realized through the action of the lifting assembly, and the pipeline is squeezed and relaxed, which is convenient for the replacement of the injection pipeline. The operation is simple, fast, practical and reliable.

[0018] 3. By installing the gap adjustment component between the positioning plate and the extrusion plate, the gap between the extrusion plate and the positioning plate can be adjusted, thereby adjusting the tightness of the extrusion of the injection pipe, which not only ensures the effectiveness of the injection pipe extrusion, but also avoids the problem of easy damage to the pipe due to excessive extrusion of the injection pipe, and effectively protects the pipe.

[0019] 4. By positioning the pre-compression wheel, the problem of excessive instantaneous extrusion force on the injection pipe when the extrusion wheel is extruded on the injection pipe, which may easily damage the injection pipe, can be reduced, thereby protecting the injection pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the front side of the installation structure of the roller extrusion device of the present invention;

[0021] Figure 2 It is a schematic diagram of the rear side of the installation structure of the roller extrusion device of the present invention;

[0022] Figure 3 It is a schematic diagram of the installation structure of the extrusion roller, the extrusion plate, the positioning plate and the lifting assembly of the present invention;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the positioning pre-pressing wheel of the present invention.

[0024] Among them: 1-extrusion roller, 2-support plate, 3-extrusion plate, 4-positioning plate, 5-matching clearance, 6-spring, 7-screw, 8-locking nut, 9-reverse nut, 10-handle, 11-cam, 12-arc extrusion groove, 13-wheel disc, 14-extrusion wheel, 15-positioning pre-pressure wheel, 16-positioning ring groove, 17-controller, 18-encoder, 19-drive motor, 20-synchronous belt, 21-mounting seat, 22-base plate. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0026] See also Figure 1-Figure 4The roller extrusion device for a roller high-pressure injector of the present invention comprises a driving mechanism and an extrusion roller 1. The driving mechanism is installed in the high-pressure injector and is used to drive the extrusion roller 1 to rotate. The extrusion roller 1 is rotatably installed on the support plate 2, and the driving end of the driving mechanism is connected to the extrusion roller 1. An extrusion plate 3 for extruding the injection pipe with the extrusion roller 1 is slidably installed on the support plate 2 below the extrusion roller 1. That is, by extruding the injection pipe with the extrusion roller 1 and the extrusion plate 3, the injection in the injection pipe can be quickly transported to the injection end of the injection pipe, thereby realizing the rapid delivery of the injection. Since the push point for the injection is set on the injection pipe, the input end of the injection pipe can be directly connected to the medicine bottle of the injection without transferring it to the syringe, thereby solving the consumables problem of the syringe and the push rod. A positioning plate 4 is slidably installed on the support plate 2 below the extrusion plate 3, and the positioning plate 4 is elastically connected to the extrusion plate 3. By means of elastic connection, the extrusion plate 3 has a certain displacement. During extrusion, the displacement of the extrusion plate 3 avoids the problem of excessive extrusion of the injection pipe when the extrusion plate is fixed and installed, which causes the injection pipe to be deformed or broken, thereby protecting the injection pipe and greatly improving the reliability of the roller extrusion device. A lifting assembly for lifting the positioning plate 4 and the extrusion plate 3 is installed on the support plate 2 below the positioning plate 4. When the lifting assembly lifts the positioning plate 4, the extrusion plate 3 above the positioning plate 4 will approach the extrusion roller 1, and the extrusion roller 1 will exert an extrusion effect on the injection pipe; when the lifting assembly lowers the position of the positioning plate 4, the extrusion plate 3 will move away from the extrusion roller 1 to release the extrusion of the injection pipe, so as to facilitate the replacement of the injection pipe.

[0027] Regarding the sliding installation of the extrusion plate 3 and the positioning plate 4. A mounting groove is provided in the support plate 2, a slide bar is installed in the mounting groove, and a slide groove is provided on the periphery of the mounting groove. The extrusion plate 3 and the positioning plate 4 are both slidably connected to the slide bar through a slider provided in the slide groove. The slide groove of this embodiment is also used to limit the extrusion plate 3 installed on the slider. When the slider is against the end of the slide groove, the extrusion plate 3 contacts the extrusion roller 1 to avoid the problem that the extrusion roller 1 is damaged by the excessive displacement of the extrusion plate 3.

[0028] A matching gap 5 is provided between the extrusion plate 3 and the positioning plate 4 to provide displacement for the extrusion plate 3. A plurality of springs 6 are provided in the matching gap 5. Specifically, a plurality of relatively arranged plug-in slots are provided on opposite sides of the extrusion plate 3 and the positioning plate 4, and the springs 6 are plugged into the plug-in slots of the extrusion plate 3 and the positioning plate 4 one by one to realize the positioning of the springs 6. By providing the springs 6, the elastic connection between the extrusion plate 3 and the positioning plate 4 is realized.

[0029] The positioning plate 4 is provided with a gap adjustment component extending into the extrusion plate 3, and the positioning plate 4 is movably connected to the gap adjustment component. The gap adjustment component is used to adjust the distance between the extrusion plate 3 and the positioning plate 4. When the distance between the two changes, the spring force of the spring 6 will also change to adjust the degree of extrusion tightness of the injection pipe. Under the premise of protecting the injection pipe, the injection pipe can also be effectively extruded. For example, when the extrusion roller 1 and the extrusion plate 3 have insufficient extrusion force on the injection pipe, the distance between the extrusion plate 3 and the positioning plate 4 is reduced, the spring 6 is further compressed, and its spring force will also increase, making it more difficult for the extrusion plate 3 to move, thereby increasing the extrusion force between the extrusion roller 1 and the extrusion plate 3, and more effectively performing extrusion injection. When the extrusion roller 1 and the extrusion plate 3 have too large an extrusion force on the injection pipe, the distance between the extrusion plate 3 and the positioning plate 4 is increased, the spring 6 will be relaxed, its spring force will be reduced, the extrusion plate 3 will be easier to move, and the extrusion force between the extrusion roller 1 and the extrusion plate 3 will be reduced, thereby avoiding the problem of excessive extrusion of the injection pipe causing the pipe to be easily damaged, and effectively protecting the pipe.

[0030] Specifically, the gap adjustment assembly includes a screw rod 7 and a locking nut 8. The screw rod 7 is movably inserted in the positioning plate 4, one end of the screw rod 7 extends into the matching gap 5 and is threadedly connected to the extrusion plate 3, and the other end of the screw rod 7 extends to the bottom of the positioning plate 4 and is threadedly connected to the locking nut 8. By adjusting the locking nut 8 under the screw rod 7, the spacing between the positioning plate 4 and the extrusion plate 3 can be adjusted, and the operation is simple and convenient.

[0031] Preferably, the portion of the screw rod 7 located in the positioning plate 4 is a round rod with no thread grooves on the surface, so as to facilitate sliding between the screw rod 7 and the positioning plate 4 .

[0032] Preferably, a reverse nut 9 is screwed onto the screw rod 7 below the locking nut 8 to prevent the locking nut 8 from loosening, thereby improving the reliability of the gap adjustment assembly.

[0033] The lifting assembly includes a handle 10 and a cam 11. The handle 10 is rotatably mounted on the side wall of the support plate 2, and the cam 11 is mounted on the handle 10, and the cam 11 is in contact with and connected to the positioning plate 4. The positioning plate 4 is lifted and lowered by rotating the cam 11, thereby squeezing or releasing the injection pipe.

[0034] The extrusion plate 3 of this embodiment is provided with an arc-shaped extrusion groove 12, and the extrusion roller 1 is inserted into the arc-shaped extrusion groove 12, and the arc-shaped extrusion groove 12 is adapted to the extrusion roller 1. When the extrusion roller 1 rotates, the extrusion roller 1 and the arc-shaped extrusion groove 12 squeeze the injection pipe therein to realize the extrusion delivery of the injection.

[0035] The extrusion roller 1 includes a wheel disc 13 and three evenly arranged extrusion wheels 14. The wheel disc 13 is rotatably mounted on the side wall of the support plate 2, and the wheel disc 13 is connected to the driving end of the driving mechanism. The three extrusion wheels 14 are rotatably mounted on the side of the wheel disc 13 away from the support plate 2. A positioning pre-pressing wheel 15 is provided between two adjacent extrusion wheels 14, and the positioning pre-pressing wheel 15 is rotatably connected to the wheel disc 13. The extrusion wheel 14 is used to extrude the injection pipe to realize the delivery of the injection; the positioning pre-pressing wheel 15 is used to guide and position the injection pipe so that the injection pipe can accurately enter between the extrusion wheel 14 and the arc-shaped extrusion groove 12, and at the same time, the injection pipe can be pre-pressed to reduce the problem of excessive instantaneous extrusion force on the injection pipe when the extrusion wheel 14 is squeezed on the injection pipe, thereby protecting the injection pipe.

[0036] Specifically, a positioning annular groove 16 with an arc-shaped cross section is provided on the side wall of the positioning pre-pressing wheel 15 to better position the injection pipe. The depth of the positioning annular groove 16 is smaller than the diameter of the injection pipe, so as to achieve pre-pressing of the injection pipe.

[0037] The diameter of the positioning pre-pressing wheel 15 is larger than the diameter of the extrusion wheel 14, the edge of the extrusion wheel 14 is flush with the edge of the wheel disc 13, and the edge of the positioning pre-pressing wheel 15 protrudes from the edge of the wheel disc 13. A gap is left between the extrusion roller 1 and the extrusion plate 3 of this embodiment to avoid excessive extrusion of the injection pipe, causing its deformation and rupture. The gap between the positioning pre-pressing wheel 15 and the extrusion plate 3 will be smaller than the gap between the extrusion wheel 14 and the extrusion plate 3. Through such a setting, the problem of direct extrusion and transportation of the injection pipe by the positioning pre-pressing wheel 15 can be effectively avoided, making the pre-pressing reliable.

[0038] In addition, regarding the installation of the extrusion wheel 14. The wheel disc 13 is provided with three positioning shafts, each of which is sleeved with two bearings. The extrusion wheel 14 is installed on the outer ring of the bearing through the bearing seat. The inner side of the bearing seat is provided with a positioning protrusion, which is inserted between the two bearings to position the bearing. A clearance groove is provided on the wheel disc 13 below the extrusion wheel 14, and one end of the extrusion wheel 14 extends into the clearance groove, which can effectively reduce the risk of the injection pipe being stuck between the extrusion wheel 14 and the wheel disc 13.

[0039] A clearance groove is also provided on the wheel disc 13 below the positioning pre-pressing wheel 15, one end of the positioning pre-pressing wheel 15 is inserted into the clearance groove, and the arc-shaped extrusion groove 12 is located outside the clearance groove. The clearance groove is provided below the positioning pre-pressing wheel 15, so that the end face of the wheel disc 13 and the arc-shaped extrusion groove 12 are aligned in position. When the injection pipe enters the wheel disc 13 along the end face of the wheel disc 13, the injection pipe can directly fall into the arc-shaped extrusion groove 12, which greatly reduces the risk of the injection pipe falling off.

[0040] The roller extrusion device further includes a controller 17. An encoder 18 is installed at the driving end of the driving mechanism for obtaining a real-time rotation speed signal of the extrusion roller 1. The encoder 18 and the driving mechanism are both electrically connected to the controller 17.

[0041] The driving mechanism includes a driving motor 19, a synchronous belt 20 and a mounting seat 21. The driving motor 19 is mounted on a base plate 22. Mounting the driving motor 19 on the base plate 22 of the high-pressure injector can effectively reduce the influence of the driving motor 19 on the extrusion roller 1 and the extrusion plate 3 when the driving motor 19 is working, and improve the working stability of the high-pressure injector. The driving motor 19 is electrically connected to the controller 17, and the driving end of the driving motor 19 is installed with a first synchronous wheel. Specifically, the driving end of the driving motor 19 is installed with an extended shaft, which is installed on the base plate 22 through a bearing seat, and the extended shaft is connected to the first synchronous wheel through a flat key. The mounting seat 21 is installed on the side wall of the support plate 2, and a rotating shaft is rotatably installed in the mounting seat 21, and a second synchronous wheel is installed in the rotating shaft, and the first synchronous wheel is connected to the second synchronous wheel through a synchronous belt 20. The driving motor 19 drives the rotating shaft through the synchronous belt 20 and the synchronous wheel. One end of the rotating shaft is connected to the extrusion roller 1 through a flat key. The rotation of the extrusion roller 1 is realized through the rotating shaft. The other end of the rotating shaft is connected to the encoder 18 , and the encoder 18 is mounted on the mounting seat 21 through a mounting plate.

[0042] The working principle of the present invention is: first, turn the handle 10 to lower the positioning plate 4 and the extrusion plate 3. Then, wrap the injection pipe around the extrusion wheel 14 and the positioning pre-pressing wheel 15 of the extrusion roller 1. After winding, turn the handle 10 again to lift the positioning plate 4 and the extrusion plate 3, so that the extrusion plate 3 squeezes the injection pipe on the extrusion roller 1. If the extrusion force is too large or insufficient, adjust the distance between the positioning plate 4 and the extrusion plate 3 by the locking nut 8 on the screw 7. When conveying the injection, start the drive motor 19, and the drive motor 19 drives the first synchronous wheel to rotate, and then drives the second synchronous wheel and the rotating shaft to rotate through the synchronous belt 20. Finally, the extrusion roller 1 installed at the end of the rotating shaft rotates. The extrusion roller 1 continuously conveys the injection in the injection pipe to its injection end to achieve extrusion and delivery of the injection.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A roller extrusion device for a roller-type high-pressure injector, characterized in that: The invention comprises a driving mechanism and an extrusion roller (1); the driving mechanism is installed in a high-pressure injector, the extrusion roller (1) is rotatably installed on a support plate (2), and a driving end of the driving mechanism is connected to the extrusion roller (1); an extrusion plate (3) for extruding an injection pipe together with the extrusion roller (1) is slidably installed on the support plate (2) below the extrusion roller (1), a positioning plate (4) is slidably installed on the support plate (2) below the extrusion plate (3), and the positioning plate (4) is elastically connected to the extrusion plate (3); a lifting component for lifting and lowering the positioning plate (4) and the extrusion plate (3) is installed on the support plate (2) below the positioning plate (4); A matching gap (5) is provided between the extrusion plate (3) and the positioning plate (4), a plurality of springs (6) are provided in the matching gap (5), a gap adjustment component extending into the extrusion plate (3) is provided in the positioning plate (4), and the positioning plate (4) is movably connected to the gap adjustment component; The gap adjustment assembly comprises a screw rod (7) and a locking nut (8); the screw rod (7) is movably inserted into the positioning plate (4), one end of the screw rod (7) extends into the matching gap (5) and is threadedly connected to the extrusion plate (3), and the other end of the screw rod (7) extends to the bottom of the positioning plate (4) and is threadedly connected to the locking nut (8); The lifting assembly comprises a handle (10) and a cam (11); the handle (10) is rotatably mounted on a side wall of the support plate (2), the cam (11) is mounted on the handle (10), and the cam (11) is in contact with and connected to the positioning plate (4).

2. A roller extrusion device for a roller type high pressure injector according to claim 1, characterized in that: A reversing nut (9) is screwed onto the screw rod (7) below the locking nut (8).

3. A roller extrusion device for a roller type high pressure injector according to claim 1, characterized in that: The extrusion plate (3) is provided with an arc-shaped extrusion groove (12), and the extrusion roller (1) is inserted into the arc-shaped extrusion groove (12).

4. A roller extrusion device for a roller type high pressure injector according to claim 1, characterized in that: The extrusion roller (1) comprises a wheel disc (13) and a plurality of extrusion wheels (14); the wheel disc (13) is rotatably mounted on a side wall of a support plate (2); the wheel disc (13) is connected to a driving end of a driving mechanism; the plurality of extrusion wheels (14) are rotatably mounted on a side of the wheel disc (13) away from the support plate (2); a positioning pre-pressing wheel (15) is provided between two adjacent extrusion wheels (14); the positioning pre-pressing wheel (15) is rotatably connected to the wheel disc (13).

5. A roller extrusion device for a roller type high pressure injector according to claim 4, characterized in that: A positioning annular groove (16) having an arc-shaped cross section is provided on the side wall of the positioning pre-pressing wheel (15), and the depth of the positioning annular groove (16) is smaller than the diameter of the injection pipe.

6. A roller extrusion device for a roller type high pressure injector according to any one of claims 1 to 5, characterized in that: The roller extrusion device also includes a controller (17); an encoder (18) is installed at the driving end of the driving mechanism, and the encoder (18) and the driving mechanism are both electrically connected to the controller (17).

7. A roller extrusion device for a roller type high pressure injector according to claim 6, characterized in that: The driving mechanism comprises a driving motor (19), a synchronous belt (20) and a mounting seat (21); the driving motor (19) is mounted on a base plate (22); a driving end of the driving motor (19) is mounted with a first synchronous wheel; the mounting seat (21) is mounted on a side wall of a support plate (2); a rotating shaft is rotatably mounted in the mounting seat (21); a second synchronous wheel is mounted in the rotating shaft; the first synchronous wheel is connected to the second synchronous wheel via a synchronous belt (20); one end of the rotating shaft is connected to the extrusion roller (1) via a flat key; and the other end of the rotating shaft is connected to an encoder (18).

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