An extrusion roller for a roller-type high-pressure syringe

Abstract

This invention discloses an extrusion roller for a roller-type high-pressure injector, relating to the injection mechanism of a high-pressure injector. It addresses the technical issues of electric injectors, which not only affect efficiency but also pose significant risks. The roller comprises a wheel disk, mounted with multiple extrusion wheels, with a pre-compression assembly positioned between adjacent extrusion wheels. This invention is practical, convenient, safe, reliable, and highly stable, effectively improving injection efficiency while also reducing the risk of the injection tube becoming dislodged.

Description

Technical Field

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

[0002] High-pressure injectors, as auxiliary equipment in radiological diagnostic and treatment systems, have gradually entered clinical use with the advancement of technologies such as X-rays, rapid film changers, image intensifiers, and artificial contrast agents. The basic function of a high-pressure injector is to quickly and accurately inject a sufficient amount of high-concentration X-ray contrast agent into the examination site, enabling diagnostic imaging and treatment of lesions. Currently, to achieve rapid injection, the main method is to connect a power injector to one end of the injection tubing. Specifically, to inject, the piston rod and syringe are first installed on the power injector. Once installed, the power injector is activated, drawing the injectable from the storage bottle into the syringe. The syringe is then connected to one end of the injection tubing, and the injection can begin. However, this method involves complex steps during syringe installation, resulting in a lengthy process and impacting work efficiency. Furthermore, the transfer of the injectable solution carries significant risks, such as contamination from prolonged exposure and dripping due to improper handling, which can hinder the smooth execution of the injection process. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the existing technology and provide an extrusion roller for a roller-type high-pressure injector, which solves the problem that the injection method using an electric injector not only affects work efficiency but also poses greater risks.

[0004] The extrusion roller for a roller-type high-pressure injector described in the present invention includes a wheel disc; a plurality of extrusion wheels for squeezing the injection liquid in the injection pipe to the injection end of the injection pipe are installed on the wheel disc, and a pre-pressing component for pre-pressing the injection pipe and guiding and positioning the injection pipe at the same time is provided between two adjacent extrusion wheels.

[0005] The wheel disc is provided with a positioning shaft, the positioning shaft is sleeved with at least one bearing, and the extrusion wheel is mounted on the outer ring of the bearing.

[0006] Two bearings are sleeved on the positioning shaft.

[0007] A fitting gap is provided between the two bearings. The extrusion wheel is mounted on the outer ring of the bearing through a bearing seat. A positioning protrusion is provided on the inner side of the bearing seat. The positioning protrusion is inserted into the fitting gap.

[0008] A protective panel extending along the end surface of the bearing seat toward the positioning axis is provided on the side of the extrusion wheel away from the wheel disc.

[0009] A first paving groove is provided on the wheel disc below the extrusion wheel, and one end of the extrusion wheel extends into the first paving groove.

[0010] The pre-pressing assembly includes a mounting shaft and a pre-pressing wheel; the mounting shaft is fixedly mounted on the wheel disc, and the pre-pressing wheel is rotatably connected to the mounting shaft; a pipeline positioning groove is provided on the side wall of the pre-pressing wheel, and the depth of the pipeline positioning groove is smaller than the diameter of the injection pipeline.

[0011] The cross section of the pipeline positioning groove is arc-shaped.

[0012] A transition arc is provided at the connection between the pre-pressing wheel and the pipeline positioning groove.

[0013] A second paving groove is provided on the wheel disc below the pre-pressing wheel, one end of the pre-pressing wheel is inserted into the second paving groove, and the pipeline positioning groove is located outside the second paving groove.

[0014] Beneficial effects

[0015] The advantages of the present invention are:

[0016] 1. The wheel and extrusion wheel squeeze the injection tube to deliver the injection, allowing the input end of the injection tube to be directly connected to the injection storage bottle, eliminating the need to transfer the injection and install the syringe. This not only reduces the number of operations required by medical staff and improves work efficiency, but also effectively avoids the risks associated with transferring the injection. In addition, the pre-stressing assembly provided on the wheel effectively reduces the instantaneous stress on the injection tube when the extrusion wheel squeezes the injection tube, protecting the injection tube. It also serves to guide and position the injection tube, reducing the risk of the injection tube falling off.

[0017] 2. The extrusion wheel is supported by two bearings and bearing seats installed on the two bearings, which not only effectively improves the stability of the extrusion wheel during the rotation and extrusion process, facilitates the stable delivery of the injection, but also facilitates the disassembly, assembly and replacement of the extrusion wheel, which is practical and convenient.

[0018] 3. The setting of the clearance groove can effectively avoid the risk of the injection pipe falling off and getting stuck between the extrusion wheel or the pre-pressing wheel and the wheel disc, greatly improving the reliability of the extrusion roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the extrusion roller of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure at AA in the middle;

[0021] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at B in the middle;

[0022] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at C in the middle;

[0023] Figure 5 It is a schematic diagram of the installation structure of the extrusion roller and the extrusion plate of the present invention.

[0024] Among them: 1-wheel disc, 2-extrusion wheel, 3-positioning shaft, 4-bearing, 5-fitting clearance, 6-bearing seat, 7-positioning protrusion, 8-protection panel, 9-first clearance groove, 10-mounting shaft, 11-pre-pressing wheel, 12-pipe positioning groove, 13-second clearance groove, 14-center hole, 15-keyway, 16-extrusion plate. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the embodiments, but this 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 Figure 1-Figure 4 The present invention provides an extrusion roller for a roller-type high-pressure syringe, comprising a wheel disc 1. The wheel disc 1 is connected to the motor in the high-pressure syringe to realize the rotation of the wheel disc 1. A center hole is provided on the wheel disc 1 for installing the rotating shaft of the motor. A key slot 15 connected to the center hole 14 is provided on the wheel disc 1 at the outer edge of the center hole 14. That is, the wheel disc 1 and the rotating shaft are connected by a flat key to improve the reliability of the connection between the two. Two mounting holes are provided on the wheel disc 1 outside the center hole 14 for installing a closing plate to close the center hole 14 and prevent dust from entering the center hole 14.

[0027] Three squeezing wheels 2 are installed on the wheel 1 for squeezing the injection liquid in the injection pipe to the injection end of the injection pipe. When the wheel 1 rotates, the injection pipe is squeezed by the squeezing wheel 2 to realize the delivery of the injection. That is, through the setting of the squeezing wheel 2, the pushing point of the injection pipe is transferred from the original end push to the pipe section between the two ends of the injection pipe. The injection input end of the injection pipe can be directly connected to the injection storage bottle. There is no need to transfer the injection and install the syringe. It not only reduces the operation of medical staff and improves work efficiency, but also effectively avoids the risks caused by transferring the injection. A pre-stressing component for pre-stressing the injection pipe and guiding and positioning the injection pipe at the same time is provided between two adjacent squeezing wheels 2. That is, there are also three pre-stressing components. It should be noted that during use, the squeezing roller of the present invention needs to be used in conjunction with the squeezing plate 16 provided thereunder to realize the squeezing of the injection pipe. The installation structure of the squeezing roller and the squeezing plate 16 is shown as follows. Figure 5During injection, the motor drives the extrusion roller of this embodiment to rotate, and the interaction between the extrusion wheel 2 and the extrusion plate 16 squeezes the injection tube, thereby delivering the injection to the injection end of the injection tube. When the pre-pressing component contacts the extrusion plate 16, the pressure on the injection tube is less than the extrusion pressure of the extrusion wheel 2 on the injection tube, thereby achieving pre-pressing of the injection tube. This arrangement can effectively reduce the instantaneous stress on the injection tube when the extrusion wheel 2 squeezes the injection tube, thereby protecting the injection tube.

[0028] Regarding the installation of the extrusion wheel 2, the wheel disc 1 is equipped with a positioning shaft 3, which is fitted with at least one bearing 4. The extrusion wheel 2 is mounted on the outer ring of the bearing 4, enabling its rotation. Specifically, the inner ring of the bearing 4 and the positioning shaft, as well as the extrusion wheel 2 and the outer ring of the bearing, are both connected by an interference fit. During the extrusion of the injection pipe, the extrusion wheel 2 also rotates relative to the injection pipe, effectively protecting it and reducing the risk of pipe deformation.

[0029] Preferably, two bearings 4 are provided on the positioning shaft 3. To ensure reliable extrusion, the width of the extrusion surface of the extrusion wheel 2 is much larger than the diameter of the injection tube. However, if the width of the extrusion wheel 2 is too large, the risk of instability of the extrusion wheel 2 increases if supported by only one bearing 4, seriously affecting the delivery of the injection. Therefore, this embodiment supports the extrusion wheel 2 at both ends with two bearings 4, which can effectively improve the stability of the extrusion wheel 2 during the rotational extrusion process, thereby facilitating the stable delivery of the injection.

[0030] A clearance 5 is defined between the two bearings 4. The extrusion wheel 2 is mounted on the outer ring of the bearing 4 via a bearing seat 6. A positioning protrusion 7 is provided on the inner side of the bearing seat 6 and engages with the clearance 5. The arrangement of the bearing seat 6 and the positioning protrusion 7 ensures that the spacing between the two bearings 4 remains consistent, providing more reliable support for the extrusion wheel 2. The extrusion wheel 2 is mounted on the bearing seat 6, facilitating its removal, assembly, and replacement.

[0031] Preferably, a protective panel 8 is provided on the side of the extrusion wheel 2 away from the wheel disc 1, extending along the end face of the bearing seat 6 toward the positioning axis 3, which is used to seal the connection between the extrusion wheel 2, the bearing seat 6, and the bearing 4 to prevent dust from entering the bearing 4 and affecting the rotation of the extrusion wheel 2.

[0032] Preferably, a first clearance groove 9 is provided on the wheel disc 1 below the extrusion wheel 2, and one end of the extrusion wheel 2 extends into the first clearance groove 9, which can effectively avoid the risk of the injection pipe being stuck between the extrusion wheel 2 and the wheel disc 1.

[0033] Preferably, the connection between the side wall of the extrusion wheel 2 and its end face away from the wheel disc 1 is designed with a rounded corner to avoid the problem that the right-angle design easily crushes the injection pipe when the injection pipe deviates.

[0034] The pre-pressing assembly of this embodiment includes a mounting shaft 10 and a pre-pressing wheel 11. The mounting shaft 10 is fixedly mounted on the wheel disc 1, and the pre-pressing wheel 11 is rotatably connected to the mounting shaft 10. A pipe positioning groove 12 is defined on the sidewall of the pre-pressing wheel 11 to position and guide the injection pipe, enabling the extrusion wheel 2 to effectively extrude the injection pipe. The depth of the pipe positioning groove 12 is less than the diameter of the injection pipe, thereby achieving pre-pressing of the injection pipe.

[0035] Preferably, the cross-section of the pipe positioning groove 12 is arc-shaped to better position the injection pipe. The diameter of the pre-compression wheel 11 is larger than the diameter of the extrusion wheel 2, the edge of the extrusion wheel 2 is flush with the edge of the wheel disc 1, and the edge of the pre-compression wheel 11 protrudes from the edge of the wheel disc 2. After the extrusion roller and the extrusion plate 16 are installed in the high-pressure injector, a gap remains between the extrusion roller and the extrusion plate 16 to avoid excessive extrusion of the injection pipe, causing it to deform and rupture. The gap between the pre-compression wheel 11 and the extrusion plate 16 will be smaller than the gap between the extrusion wheel 2 and the extrusion plate 16. Through such a setting, the problem of direct extrusion and delivery of the injection pipe by the pre-compression wheel 11 can be effectively avoided, making the pre-compression reliable.

[0036] Preferably, a transition arc is provided at the connection between the pre-compression wheel 11 and the pipe positioning groove 12, which on the one hand protects the injection pipe and on the other hand facilitates the injection pipe to enter the pipe positioning groove 12, reducing the risk of the injection pipe falling off.

[0037] Preferably, a second clearance groove 13 is formed on the wheel disc 1 below the pre-pressing wheel 11. One end of the pre-pressing wheel 11 is inserted into the second clearance groove 13, and the pipeline positioning groove 12 is located outside the second clearance groove 13. The provision of the second clearance groove 13 allows the end surface of the wheel disc 1 to be aligned with the pipeline positioning groove 12. When the injection pipeline enters the wheel disc 1 along the end surface of the wheel disc 1, the injection pipeline can directly fall into the pipeline positioning groove 12, greatly reducing the risk of the injection pipeline falling off.

[0038] Preferably, the connection between the second clearance groove 13 and the side wall of the wheel disc 1 is designed with rounded corners, which can effectively avoid the risk of the pipeline being cut.

[0039] The working principle of the present invention is: when the wheel disc 1 rotates, the extrusion wheel 2 and the pre-pressing wheel 11 installed on the wheel disc 1 also rotate along with the wheel disc 1. When the pre-pressing wheel 11 is in contact with the injection pipe, the injection pipe falls into the pipe positioning groove 12 to realize the positioning of the injection pipe. When the pre-pressing wheel 11 is in contact with the extrusion plate 16, since the depth of the pipe positioning groove 12 is smaller than the diameter of the injection pipe, the pre-pressing wheel 11 pre-presses the injection pipe. At this time, the pre-pressing wheel 11 rotates freely due to the resistance of the injection pipe, avoiding tearing of the injection pipe. When the extrusion wheel 2 behind the pre-pressing wheel 11 is in contact with the extrusion plate 16, the injection pipe is squeezed and the injection is transported to the injection end. And during the extrusion process, the extrusion wheel 2 will also rotate freely, avoiding tearing of the injection pipe.

[0040] 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. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An extrusion roller for a roller-type high-pressure injector, characterized in that: The invention comprises a wheel disc (1); a plurality of extrusion wheels (2) for squeezing the injection liquid in the injection pipe to the injection end of the injection pipe are installed on the wheel disc (1); a pre-pressing component for pre-pressing the injection pipe and guiding and positioning the injection pipe is provided between two adjacent extrusion wheels (2); The pre-pressing assembly comprises a mounting shaft (10) and a pre-pressing wheel (11); the mounting shaft (10) is fixedly mounted on the wheel disc (1), and the pre-pressing wheel (11) is rotatably connected to the mounting shaft (10); a pipeline positioning groove (12) is provided on the side wall of the pre-pressing wheel (11), and the depth of the pipeline positioning groove (12) is smaller than the diameter of the injection pipeline; The wheel disc (1) is provided with a positioning shaft (3), the positioning shaft (3) is sleeved with at least one bearing (4), and the extrusion wheel (2) is mounted on the outer ring of the bearing (4).

2. The extrusion roller for a roller-type high-pressure injector according to claim 1, characterized in that: Two bearings (4) are sleeved on the positioning shaft (3).

3. The squeezing roller for a roller-type high-pressure injector according to claim 2, characterized in that: A fitting gap (5) is provided between the two bearings (4), and the extrusion wheel (2) is mounted on the outer ring of the bearing (4) through a bearing seat (6). A positioning protrusion (7) is provided on the inner side of the bearing seat (6), and the positioning protrusion (7) is inserted into the fitting gap (5).

4. The squeezing roller for a roller-type high-pressure injector according to claim 2, characterized in that: A protective panel (8) extending along the end surface of the bearing seat (6) toward the positioning axis (3) is provided on the side of the extrusion wheel (2) away from the wheel disc (1).

5. The squeezing roller for a roller-type high-pressure injector according to any one of claims 1 to 4, characterized in that: A first clearance groove (9) is provided on the wheel disc (1) below the extrusion wheel (2), and one end of the extrusion wheel (2) extends into the first clearance groove (9).

6. The squeezing roller for a roller-type high-pressure injector according to claim 1, characterized in that: The cross section of the pipeline positioning groove (12) is arc-shaped.

7. The squeezing roller for a roller-type high-pressure injector according to claim 1, characterized in that: A transition arc is provided at the connection between the pre-pressing wheel (11) and the pipeline positioning groove (12).

8. The squeezing roller for a roller-type high-pressure injector according to claim 1, characterized in that: A second clearance groove (13) is provided on the wheel disc (1) below the pre-pressing wheel (11), one end of the pre-pressing wheel (11) is inserted into the second clearance groove (13), and the pipeline positioning groove (12) is located outside the second clearance groove (13).

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