High-pressure injector magnetic field shielding enhancing system under ultrahigh field intensity
By setting up magnetically-free metal sealed conductive rubber rings and multi-layer shielded cables in the injection device and control device of the high-voltage syringe, the problem of poor anti-interference performance of the high-voltage syringe in the ultra-high field strength environment is solved, and the stable operation of the system under the ultra-high magnetic field is achieved and the accuracy of the diagnostic results is achieved.
Patent Information
- Application Number
- CN202421161730.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The existing high-voltage syringe shielding system has poor anti-interference performance under an ultra-high field strength (5.0T and above magnetic fields), resulting in a decrease in signal authenticity, producing abnormal data, affecting the normal operation of the system, and radiating electromagnetic waves to the outside, interfering with the diagnostic results of nuclear magnetic resonance imaging.
A high-voltage syringe magnetic field shielding enhancement system under ultra-high field strength was designed. By setting a magnetic-free metal sealed conductive rubber ring and a magnetic-free metal paint surface in the injection device and control device, combined with an anti-magnetic field interference cable, including a multi-layer shielding structure of the inner and outer layers, the system can be ensured to operate stably in an ultra-high magnetic field environment.
The anti-magnetic field interference capability of the high-voltage syringe is improved, and the generation of wrong data signals under ultra-high magnetic fields is avoided, and the external radiation level of the electromagnetic signal is reduced, so as not to affect the doctor's imaging diagnosis results.
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Figure CN222854359U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of high-pressure injectors and relates to a magnetic field shielding enhancement system for high-pressure injectors under ultra-high field strength. Background Art
[0002] As an auxiliary device in the radiology diagnosis and treatment system, the high-pressure injector is gradually used in clinical practice with the development of X-ray, fast film changer, image intensifier and artificial contrast agent. Its application in MRI is similar. The contrast agent injection button of the high-pressure injector is activated for a specific injection sequence. The contrast agent enters the human blood vessels through the indwelling needle line. The final imaging is performed under the MRI equipment, which can perform imaging diagnosis on the lesion.
[0003] The existing high-pressure syringe shielding system is only suitable for low-field strength environments. Once used in ultra-high field strength (specifically 5.0T and above magnetic field), its anti-interference performance is poor. The signal authenticity drops significantly under ultra-high magnetic field strength, resulting in abnormal data, which in turn affects the normal operation of the high-pressure injection system. In addition, the high-pressure syringe shielding system itself will radiate electromagnetic waves. These electromagnetic waves will be captured by the nuclear magnetic resonance equipment and will produce artifacts in the final imaging, thereby interfering with the doctor's correct diagnosis. Summary of the invention
[0004] In view of the shortcomings of the prior art, the utility model provides a high-pressure injector magnetic field shielding enhancement system under ultra-high field strength, which can improve the electromagnetic compatibility performance of the system and meet the use requirements under ultra-high magnetic field strength.
[0005] The technical solution provided by the utility model is as follows:
[0006] The utility model provides a high-pressure injector magnetic field shielding enhancement system under ultra-high field strength, comprising an injection device and a control device, wherein the injection device forms a first shielding cavity through an upper shell, a lower shell and a front shell, a non-magnetic metal sealing conductive rubber ring is provided at the connection between the front shell, the upper shell and the lower shell, and a non-magnetic metal paint surface is attached inside, the control device forms a second shielding cavity through a square shell, a front panel and a rear panel, the square shell is a non-magnetic metal shell, the front panel and the rear panel are non-magnetic metal plates, a non-magnetic metal sealing conductive rubber strip is provided at the connection between the square shell and the front panel and the rear panel, and the injection device is connected to the control device through an anti-magnetic field interference cable.
[0007] Furthermore, the non-magnetic metal paint surface includes an inner paint surface and an outer paint surface, the inner paint surface is a metal copper spray paint with a thickness of 0.5 mm, and the outer paint surface is a varnish with a thickness of 25 um.
[0008] Furthermore, the lower shell is provided with a groove for accommodating the non-magnetic metal sealing conductive rubber ring.
[0009] Furthermore, the control device is crimped with the anti-magnetic field interference cable through a heavy-duty connector arranged on the front panel.
[0010] Furthermore, the anti-magnetic field interference cable includes an inner layer and an outer layer, the inner layer includes an inner ring cable located in the center and an outer ring cable arranged around the inner ring cable, the inner layer is also dispersed with fillers, and the outer layer is provided with aluminum foil Mylar, pure copper wire braided shielding net, non-woven fabric and outer cover from the inside to the outside.
[0011] Furthermore, the inner ring cable includes 2 groups of digital signal cables and 2 groups of analog signal cables, and the outer ring cable includes 7 groups of power cables. The cores of the digital signal cables, analog signal cables and power cables are all twisted pair cables. The periphery of the digital signal cables and analog signal cables is wrapped with pure copper braided shielding mesh, aluminum foil Mylar and polytetrafluoroethylene tape in sequence, and the periphery of the power cables is wrapped with polytetrafluoroethylene tape, and fillers are also dispersed inside the power cables.
[0012] Furthermore, the upper shell, the lower shell and the front shell of the injection device and the square shell, the front panel and the rear panel of the control device are all fixedly connected by copper screws.
[0013] Furthermore, the injection device is fixed to the top of the supporting device through a non-magnetic bent pipe arranged on one side of the upper shell and the lower shell.
[0014] Furthermore, a handle is provided on the rear panel of the control device.
[0015] Furthermore, the front shell, the upper shell and the lower shell are all ABS plastic shells. Beneficial Effects
[0016] The utility model can improve the ability of the high-pressure injector to resist magnetic field interference, so that it will not be interfered by the ultra-high magnetic field to produce erroneous data signals and fail to work normally. It reduces the external radiation level of the electromagnetic signal of the high-pressure injector and does not affect the doctor's imaging diagnosis results. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The utility model is a schematic diagram of the overall structure of a high-pressure injector magnetic field shielding enhancement system under ultra-high field strength.
[0018] Figure 2 It is a schematic diagram of the structure of the injection device.
[0019] Figure 3 It is a structural diagram of the control device.
[0020] Figure 4 It is a structural diagram of a cable that is resistant to magnetic field interference.
[0021] Explanation of the reference numerals: 1. non-magnetic bent pipe; 2. supporting device; 3. injection device; 4. cable with resistance to magnetic field interference; 5. control device; 6. heavy-duty connector; 7. handle; 8. front shell; 9. non-magnetic metal sealed conductive rubber ring; 10. lower shell; 11. upper shell; 12. groove; 13. square shell; 14. front non-magnetic metal sealed conductive rubber strip; 15. front panel; 16. rear panel; 17. rear non-magnetic metal sealed conductive rubber strip; 18. outer cover; 19. non-woven fabric; 20. pure copper braided shielding mesh; 21. aluminum foil Mylar; 22. filler; 23. power cable core; 24. digital signal cable core; 25. analog signal cable core; 26. polytetrafluoroethylene tape. DETAILED DESCRIPTION
[0022] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.
[0023] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example 1
[0025] like Figure 1As shown, an embodiment of the utility model provides a high-pressure injector magnetic field shielding enhancement system under ultra-high field strength, including an injection device 3 and a control device 5, wherein the injection device 3 forms a first shielding cavity through an upper shell 11, a lower shell 10 and a front shell 8, and a non-magnetic metal sealing conductive rubber ring 9 is provided at the connection between the front shell 8, the upper shell 11 and the lower shell 10, and a non-magnetic metal paint surface is attached to the inside, and the control device 5 forms a second shielding cavity through a square shell and a front panel 15 and a rear panel 16, wherein the square shell 13 is a non-magnetic metal shell, and the front panel 15 and the rear panel 16 are non-magnetic metal plates, and a non-magnetic metal sealing conductive rubber strip is provided at the connection between the square shell 13 and the front panel 15 and the rear panel 16, and the injection device 3 is connected to the control device 5 through an anti-magnetic field interference cable 4.
[0026] By adopting the above technical solution, through the carefully designed shielding cavity and anti-magnetic field interference cables, comprehensive protection of the internal components of the high-pressure syringe is achieved, ensuring its stable and efficient operation in an ultra-high field strength environment, and improving the performance and use effect of the medical equipment. Such a design has extremely high practical value for application scenarios of precision medical operations in ultra-high field strength (specifically 5.0T and above magnetic field). Example 2
[0027] like Figure 1-4 As shown, the embodiment of the utility model provides a high-pressure injector magnetic field shielding enhancement system under ultra-high field strength, including a non-magnetic curved tube 1, a support device 2, an injection device 3, an anti-magnetic field interference cable 4 and a control device 5. The injection device 3 is fixed to the top of the support device 2 through the non-magnetic curved tube 1 to provide support for the injection device 3. A motor connected to the motor anti-magnetic field interference cable 4 is provided inside the injection device 3. A main circuit board is provided inside the control device 5. The main circuit board inside the control device 5 switches the power supply of the injection device 3 on and off through the anti-magnetic field interference cable 4 and communicates with the injection device 3.
[0028] In this embodiment, the anti-magnetic field interference cable 4 includes an inner layer and an outer layer, the inner layer includes an inner ring cable located in the center and an outer ring cable arranged around the inner ring cable, the inner layer is also dispersed with fillers 22, and the outer layer is provided with aluminum foil Mylar 21, pure copper wire braided shielding net 20, non-woven fabric 19 and outer sheath 18 from the inside to the outside.
[0029] In this embodiment, the inner ring cable includes 2 groups of digital signal cables and 2 groups of analog signal cables, and the outer ring cable includes 7 groups of power cables. The cores of the digital signal cables, analog signal cables and power cables are all twisted pair cables. The periphery of the digital signal cables and analog signal cables is wrapped with a pure copper braided shielding mesh 20, an aluminum foil Mylar 21 and a polytetrafluoroethylene tape 26 in sequence. The periphery of the power cables is wrapped with a polytetrafluoroethylene tape 26, and fillers 22 are also dispersed inside the power cables.
[0030] Specifically, the coverage rate of the aluminum foil Mylar 21 and the polytetrafluoroethylene tape 26 is 100%, the overlap rate is not less than 50%, the pure copper braided shielding net 20 is made of 288 pure copper wires with a diameter of 0.12 mm, and the braiding rate of the pure copper braided shielding net 20 reaches 80%; the maximum lay length of the power cable core 23 is 20 times the sum of the outer diameters of the two twisted pair wires, the maximum lay length of the digital signal cable core 24 and the analog signal cable core 26 is 5 times the sum of the outer diameters of the two twisted pair wires, and the digital signal cable and the analog signal cable need to meet the characteristic impedance requirement of 100 ohms.
[0031] like Figure 2 As shown, the injection device 3 includes a front shell 8, a non-magnetic metal sealing conductive rubber ring 9, a lower shell 10 and an upper shell 11. The materials of the front shell 8, the upper shell 11 and the lower shell 10 are all ABS plastic materials, and the inner sides of the front shell 8, the upper shell 11 and the lower shell 10 are uniformly sprayed with non-magnetic metal paint. The lower shell 10 is provided with a groove 12 for accommodating the non-magnetic metal sealing conductive rubber ring 9, and a circle of non-magnetic metal sealing conductive rubber ring 9 is attached to the edge of the front shell 8. The front shell 8, the upper shell 11 and the lower shell 10 are fixed by copper screws to form a closed metal shielding cavity. The anti-magnetic field interference cable 4 enters the injection device through the threading hole at the bottom of the lower shell 10 and is connected to the motor, and the anti-magnetic field interference cable 4 is reliably in contact with the non-magnetic metal paint surface inside the upper shell 11 of the injection device 3, and then the aluminum foil Mylar 21 and the pure copper wire braided shielding net 20 on the outer layer of the cable are also connected to the system.
[0032] Specifically, the width of the non-magnetic metal sealed conductive rubber ring 9 is 6 mm, the thickness is 0.5 mm, and the internal conductive medium is a glass-plated silver material. The rubber ring can be embedded in the groove 12 of the lower shell 10. When the upper shell 11 and the lower shell 10 are installed, the force is applied to form a conductive effect, thereby connecting the front shell 8 and the conductive paint inside the upper shell 11 and the lower shell 10, and finally forming a complete shielding cavity.
[0033] In this embodiment, the non-magnetic metal paint surface includes an inner paint surface and an outer paint surface, the inner paint surface is a metal copper spray paint with a thickness of 0.5 mm, and the outer paint surface is a varnish with a thickness of 25 um.
[0034] In this embodiment, the injection device 3 is fixed to the top of the support device 2 through a non-magnetic curved tube 1 provided on one side of the upper shell 11 and the lower shell 10 .
[0035] like Figure 3As shown, the control device 5 includes a square shell 13, a front non-magnetic metal sealing strip 14, a front panel 15, a rear panel 16 and a rear non-magnetic metal sealing strip 17. The square shell 13, the front panel 15 and the rear panel 16 are all made of non-magnetic metal materials. The square shell 13, the front panel 15 and the rear panel are fixed by copper screws, and the whole is wrapped into a shielding cavity by the front non-magnetic metal sealing strip 14 and the non-magnetic metal sealing strip 17. The aluminum foil Mylar 21 and the pure copper wire braided shielding net of the outer layer of the anti-magnetic field interference cable 4 are crimped on the heavy-load connector 6 provided on the front panel 15 and are connected to the main circuit board inside the control device 5 through the heavy-load connector 6, and finally the control device 5 and the injection device 3 form a complete shielding system.
[0036] Specifically, the thickness of the front non-magnetic metal sealing strip 14 and the rear non-magnetic metal sealing strip 17 is 2 mm. The sealing strips are made of a mixture of metal silver particles and rubber material. The front non-magnetic metal sealing strip 14 and the rear non-magnetic metal sealing strip 17 are attached to the inner sides of the front panel 15 and the rear panel 16.
[0037] In this embodiment, a handle 7 is further provided on the rear panel of the control device 5 .
[0038] The utility model can improve the ability of the high-pressure injector to resist magnetic field interference, so that it will not be interfered by the ultra-high magnetic field to produce erroneous data signals and fail to work normally. It reduces the external radiation level of the electromagnetic signal of the high-pressure injector and does not affect the doctor's imaging diagnosis results.
[0039] The present invention is disclosed above with preferred embodiments, but they are not intended to limit the present invention. Any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims
1. A high-pressure injector magnetic field shielding enhancement system under ultra-high field strength, characterized in that: It includes an injection device and a control device. The injection device forms a first shielding cavity through an upper shell, a lower shell and a front shell. The connection between the front shell, the upper shell and the lower shell is provided with a non-magnetic metal sealing conductive rubber ring and a non-magnetic metal paint surface is attached inside. The control device forms a second shielding cavity through a square shell, a front panel and a rear panel. The square shell is a non-magnetic metal shell, and the front panel and the rear panel are non-magnetic metal plates. The connection between the square shell and the front panel and the rear panel is provided with a non-magnetic metal sealing conductive rubber strip. The injection device and the control device are connected through an anti-magnetic field interference cable.
2. The high-pressure injector magnetic field shielding enhancement system under ultra-high field strength according to claim 1 is characterized in that: The non-magnetic metal paint surface includes an inner paint surface and an outer paint surface, the inner paint surface is a metal copper spray paint with a thickness of 0.5 mm, and the outer paint surface is a varnish with a thickness of 25 um.
3. The high-pressure injector magnetic field shielding enhancement system under ultra-high field strength according to claim 1 is characterized in that: The lower shell is provided with a groove for accommodating the non-magnetic metal sealing conductive rubber ring.
4. The high-pressure injector magnetic field shielding enhancement system under ultra-high field strength according to claim 1 is characterized in that: The control device is crimped with the anti-magnetic field interference cable through a heavy-duty connector arranged on the front panel.
5. The high-pressure injector magnetic field shielding enhancement system under ultra-high field strength according to claim 1 is characterized in that: The anti-magnetic field interference cable includes an inner layer and an outer layer, the inner layer includes an inner ring cable located in the center and an outer ring cable arranged around the inner ring cable, the inner layer is also dispersed with fillers, and the outer layer is provided with aluminum foil Mylar, pure copper wire braided shielding net, non-woven fabric and outer cover from the inside to the outside.
6. The high-pressure injector magnetic field shielding enhancement system under ultra-high field strength according to claim 5 is characterized in that: The inner ring cables include 2 groups of digital signal cables and 2 groups of analog signal cables, and the outer ring cables include 7 groups of power cables. The cores of the digital signal cables, analog signal cables and power cables are all twisted pair cables. The peripheries of the digital signal cables and analog signal cables are wrapped with pure copper braided shielding mesh, aluminum foil Mylar and polytetrafluoroethylene tape in sequence. The peripheries of the power cables are wrapped with polytetrafluoroethylene tape, and fillers are also dispersed inside the power cables.
7. The high-pressure injector magnetic field shielding enhancement system under ultra-high field strength according to claim 1 is characterized in that: The upper shell, the lower shell and the front shell of the injection device as well as the square shell, the front panel and the rear panel of the control device are fixedly connected by copper screws.
8. The high-pressure injector magnetic field shielding enhancement system under ultra-high field strength according to claim 1 is characterized in that: The injection device is fixed to the top of the supporting device through a non-magnetic curved pipe arranged on one side of the upper shell and the lower shell.
9. The high-pressure injector magnetic field shielding enhancement system under ultra-high field strength according to claim 1, characterized in that: A handle is also provided on the rear panel of the control device.
10. The high-pressure injector magnetic field shielding enhancement system under ultra-high field strength according to claim 1, characterized in that: The front shell, the upper shell and the lower shell are all ABS plastic shells.