A high pressure injector with a bullet wheel

Abstract

The present invention discloses a high-pressure injector with a spring-type cylinder, which relates to medical equipment. The present invention proposes a solution to the contradiction between cost and anti-jamming in the prior art. A radially extending slide groove is arranged between adjacent guide wheels of a negative film, and the slide groove is open at one end close to the edge of the negative film and closed at the other end close to the center of the disc. A matching slider is arranged in the positioning groove, and a spring is also arranged. One end of the spring is connected to the bottom of the slider, and the other end is connected to the closed end of the slide groove. A pressure wheel is installed at the head of the slider, and the slider is limited by the open end of the slide groove, so that the edge of the pressure wheel protrudes slightly from the edge of the negative film. The advantage is that the problem of wheel pressure turntable jamming is solved with a simple structure, so that both the production cost and the maintenance cost are greatly reduced.

Description

Technical Field

[0001] The invention relates to a medical device, in particular to a bullet-wheel type high-pressure injector. Background Art

[0002] The high-pressure injector directly injects medical liquids such as contrast agents into the human artery, and the liquid catheter and the pressure output mechanism are both in a high-pressure state. In order to stably apply sufficient infusion pressure to the soft catheter, CN113289121A, a roller-type high-pressure injector, and CN113289120A, a roller extrusion device for a roller-type high-pressure injector, pioneered the wheel pressure scheme. However, this scheme requires the cooperation of components such as the extrusion plate, the handle, the cam, and the positioning plate, and the positioning plate needs to be elastically connected to the extrusion plate through a spring to ensure continuous extrusion of the pipeline. Because they are all in a high-pressure contact state, although the extrusion roller and the extrusion plate are in rolling contact, as long as the catheter has a little deformation abnormality, the extrusion roller and the extrusion plate will be stuck. Mechanical abnormalities such as stuck during the operation will directly affect the success of the operation and endanger the safety of patients. In addition, the handle and cam need to lock or release the positioning plate, and the components are numerous and the structure is complex, resulting in a rapid increase in production costs and maintenance costs.

[0003] The industry has not yet found an effective solution to the contradiction between cost and anti-jamming. Summary of the invention

[0004] The object of the present invention is to provide a bullet-type high-pressure injector to solve the problems existing in the above-mentioned prior art.

[0005] The invention discloses a high-pressure injector with a spring wheel, comprising a body, a wheel pressure rotating disc is arranged on the body, and a pressing seat is arranged below the wheel pressure rotating disc; a catheter passes through between the wheel pressure rotating disc and the pressing seat; the wheel pressure rotating disc and the pressing seat are closely matched to continuously squeeze the inserted catheter tube section;

[0006] It is characterized in that the wheel pressure turntable is provided with a film; a plurality of guide wheels are installed at equal intervals on the side of the film away from the body, and the edges protrude from the edge of the film; a radially extending slide groove is arranged in the middle of adjacent guide wheels of the film, the end of the slide groove close to the edge of the film is open, and the end close to the center of the disk is closed; a matching slider is arranged in the positioning groove, and a spring is also arranged; one end of the spring is connected to the bottom of the slider, and the other end is connected to the closed end of the slide groove; a pressure wheel is installed on the head of the slider, and the slider is limited by the open end of the slide groove so that the edge of the pressure wheel slightly protrudes from the edge of the film.

[0007] The bottom film is provided with a boss extending away from the machine body, and the slide groove is arranged in the boss.

[0008] The open end of the slide groove is provided with a limiting portion which is retracted inwards.

[0009] The wheel pressure turntable is also provided with a cover plate coaxially arranged with the bottom film; the cover plate is installed on the outside of the bottom film away from the machine body, and installation space for the pressure wheel and the guide wheel is reserved between the bottom film and the cover plate.

[0010] The cover plate is provided with a plurality of mounting holes, and the boss is provided with screw holes at positions corresponding to the mounting holes; the bottom plate and the cover plate are fixedly mounted by bolts.

[0011] The cover sheet is provided with a maintenance window at a position corresponding to the closure of the slide slot.

[0012] The cover sheet is provided with a positioning groove at a position corresponding to the slider head; the end surface of the protruding boss of the slider head is embedded in the positioning groove.

[0013] The closed end of the slide groove is provided with at least one chip removal groove, and the cover sheet is provided with a chip removal hole at a position corresponding to the chip removal groove.

[0014] The two bottom corners of the closed end of the slide groove are each provided with a chip removal groove.

[0015] The end surface of the pressing seat in contact with the wheel pressure rotating disk is provided with a protective layer.

[0016] The advantage of the spring-type high-pressure injector described in the present invention is that it solves the problem of the wheel pressure turntable getting stuck with a simple structure, so that both the production cost and the maintenance cost are greatly reduced. The boss can improve the overall rigidity of the wheel pressure turntable, and can also facilitate the processing and production of the slide groove, so that the sliding of the sliding block during rotation is more stable. The setting of the cover plate can prevent the spring from loosening and improve safety. The setting of the maintenance window can quickly eliminate simple faults in the spring without disassembly. The setting of the positioning groove can quickly align the cover plate with the bottom plate, which is convenient for bolt installation and fixing. The chip removal groove can quickly clean up small debris such as dust and hair. The protective layer can reduce the wear rate of the pressure wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a bullet-type high-pressure injector according to the present invention.

[0018] Figure 2 yes Figure 1 A partial enlarged view of .

[0019] Figure 3 It is a structural schematic diagram of the wheel pressure turntable.

[0020] Figure 4 It is a side view of the wheel pressure turntable.

[0021] Figure 5 Schematic diagram of the structure of the cover sheet.

[0022] Figure 6 It is a schematic diagram of the structure of the wheel pressure turntable after removing the cover sheet.

[0023] Figure 7 It is a three-dimensional diagram of the wheel pressure turntable after removing the cover plate.

[0024] Figure 8 Schematic diagram of the structure of the slider.

[0025] Reference numerals:

[0026] 100-body, 101-catheter;

[0027] 200-wheel pressure turntable;

[0028] 210-bottom film, 211-boss, 212-limiting portion, 213-sliding groove, 214-chip groove;

[0029] 221-guide wheel, 222-pressure wheel, 223-slider, 224-spring;

[0030] 230-cover plate, 231-positioning slot, 232-maintenance window, 233-chip removal hole, 234-mounting hole;

[0031] 300-pressing seat, 301-protective layer. DETAILED DESCRIPTION

[0032] like Figure 1-8 As shown, the bullet-type high-pressure injector of the present invention comprises a body 100, a wheel pressure turntable 200 and a pressing seat 300 arranged on the body 100. The wheel pressure turntable 200 is arranged above the pressing seat 300 and is closely matched with the pressing seat 300 through the pressure wheel 222. The catheter 101 is connected in series with various required medical liquids, and each branch is collected and enters the position between the wheel pressure turntable 200 and the pressing seat 300, and then connected to the human body for input.

[0033] The wheel pressure turntable 200 is mainly composed of a bottom plate 210 , a guide wheel 221 , a pressure wheel 222 , a slider 223 , a spring 224 and a cover plate 230 .

[0034] The bottom film 210 is closest to the body 100, and a boss 211 extends away from the body 100. The bottom film 210 is provided with three guide wheels 221 at equal intervals outside the boss 211. The boss 211 is provided with a radially extending slide 213 between adjacent guide wheels 221. The end of the slide 213 close to the center of the disk is closed, and the side close to the edge of the disk is open. In order to facilitate installation and maintenance, the end face of the slide 213 away from the body 100 is also open. A matching slider 223 is provided in the slide 213, and a spring 224 is installed between the slider 223 and the closed end of the slide 213. The spring 224 always applies a thrust to the slider 223 pointing to the edge of the disk. The boss 211 is provided with a limit portion 212 protruding inwardly at the open end of the slide 213 to prevent the slider 223 from detaching. A pressure wheel 222 is provided at the head of the slider 223. The edges of the pressure wheel 222 and the guide wheel 221 slightly protrude from the edge of the bottom film 210. The slide 213 is provided with a chip removal groove 214 at two bottom corners of the closed end.

[0035] The cover sheet 230 is provided with a positioning groove 231 at a position relative to the head of the slider 223. The end surface of the protruding boss 211 of the head of the slider 223 is embedded in the slide groove 213. A maintenance window 232 is provided at a position of the cover sheet 230 relative to the closed end of the slide groove 213, which can expose a part of the spring 224 for quick troubleshooting of simple faults. A chip removal hole 233 of a shape and size matching the chip removal groove 214 is also provided. The cover sheet 230 is also provided with a plurality of mounting holes 234, and the boss 211 is provided with screw holes at positions corresponding to the mounting holes 234; the bottom sheet 210 and the cover sheet 230 are fixed by bolts.

[0036] The end surface of the protective layer 301 that contacts the wheel pressure turntable 200 can be provided with a protective layer 301 to reduce wear. The protective layer 301 can be a silicone sheet or a protective plastic sheet.

[0037] The working principle of a bullet-type high-pressure syringe described in the present invention is as follows: the body 100 rotates the wheel pressure turntable 200 at a constant speed through the built-in motor and control circuit. During the rotation process, the guide wheel 221 maintains the position of the catheter 101 always directly below the wheel pressure turntable 200. The pressure wheel 222 applies a preset extrusion force to the catheter 101 with the cooperation of the spring 224. The extrusion force depends on the elasticity of the spring 224. Those skilled in the art can select a spring 224 with specific elasticity based on reasonable common sense or actual needs. The wheel pressure turntable 200 cooperates with the pressing seat 300 to squeeze the catheter 101 and press the medical liquid in the catheter 101 toward the human body end. When simple cleaning is required, the debris can be swept into the chip groove 214 through the maintenance window 232, and then quickly collected in other containers. Collecting it in the chip groove 214 first and then sweeping it out can effectively reduce the degree of dust compared to sweeping it out directly from the plane of the closed end. When the spring needs to be replaced or other maintenance is required, the bolts between the bottom plate 210 and the cover plate 230 can be removed.

[0038] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A high-pressure injector of a spring-loaded type, comprising a body (100), a wheel pressure rotating disc (200) being provided on the body (100), and a pressing seat (300) being provided below the wheel pressure rotating disc (200); a catheter (101) passing through between the wheel pressure rotating disc (200) and the pressing seat (300); the wheel pressure rotating disc (200) and the pressing seat (300) being closely matched to continuously squeeze the inserted catheter (101) pipe section; It is characterized in that The wheel pressure turntable (200) is provided with a bottom film (210); a plurality of guide wheels (221) are installed at equal intervals on the side of the bottom film (210) away from the body (100), and the edges thereof protrude from the edge of the bottom film (210); a radially extending slide groove (213) is provided in the middle of adjacent guide wheels (221) of the bottom film (210), and the slide groove (213) is open at one end close to the edge of the bottom film (210) and closed at the other end close to the center of the disk; a matching slider (223) is provided in the positioning groove (231), and a spring (224) is also provided; one end of the spring (224) is connected to the bottom of the slider (223), and the other end is connected to the closed end of the slide groove (213); a pressure wheel (222) is installed at the head of the slider (223), and the slider (223) is limited by the open end of the slide groove (213), so that the edge of the pressure wheel (222) slightly protrudes from the edge of the bottom film (210); The bottom film (210) is provided with a boss (211) extending in a direction away from the machine body (100), and the slide groove (213) is arranged in the boss (211); The open end of the slide groove (213) is provided with a limiting portion (212) that is retracted inwards; The wheel pressure turntable (200) is further provided with a cover plate (230) arranged coaxially with the bottom plate (210); the cover plate (230) is installed on the outside of the bottom plate (210) away from the machine body (100), and a space for installing a pressure wheel (222) and a guide wheel (221) is reserved between the bottom plate (210) and the cover plate (230).

2. A high-pressure bullet-type injector according to claim 1, characterized in that: The cover plate (230) is provided with a plurality of mounting holes (234), and the boss (211) is provided with screw holes at positions corresponding to the mounting holes (234); the bottom plate (210) and the cover plate (230) are fixedly mounted by means of bolts.

3. A high-pressure bullet-type injector according to claim 1, characterized in that: The cover sheet (230) is provided with a maintenance window (232) at a position corresponding to the closure of the slide groove (213).

4. A high-pressure bullet-type injector according to claim 1, characterized in that: The cover plate (230) is provided with a positioning groove (231) at a position corresponding to the head of the slider (223); the end surface of the protruding boss (211) on the head of the slider (223) is embedded in the positioning groove (231).

5. The bullet-type high-pressure injector according to claim 1, characterized in that: The closed end of the slide groove (213) is provided with at least one chip removal groove (214), and the cover plate (230) is provided with a chip removal hole (233) at a position corresponding to the chip removal groove (214).

6. A high-pressure bullet-type injector according to claim 5, characterized in that: A chip removal groove (214) is provided at two bottom corners of the closed end of the slide groove (213).

7. A bullet-type high-pressure injector according to any one of claims 1 to 6, characterized in that: The end surface of the pressing seat (300) in contact with the wheel pressure rotating disk (200) is provided with a protective layer (301).

Images