CN1233430C - Deriving device of remote after-loading intracavitary unit - Google Patents
Deriving device of remote after-loading intracavitary unit Download PDFInfo
- Publication number
- CN1233430C CN1233430C CN 01129300 CN01129300A CN1233430C CN 1233430 C CN1233430 C CN 1233430C CN 01129300 CN01129300 CN 01129300 CN 01129300 A CN01129300 A CN 01129300A CN 1233430 C CN1233430 C CN 1233430C
- Authority
- CN
- China
- Prior art keywords
- wheel
- source
- ring
- stem piece
- guide block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1007—Arrangements or means for the introduction of sources into the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1007—Arrangements or means for the introduction of sources into the body
- A61N2005/1008—Apparatus for temporary insertion of sources, e.g. afterloaders
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
A driving device can safely drive small radioactive sources of rearmounted machines and can make source driving mechanisms freely rotate. Gaps respectively between a source guiding block and an annular sheave and between a belt guide pulley and the source guiding block are small, and the assembly is easy; accordingly, the source guiding block and the annular sheave are in a self-adapting state in running, and simultaneously, radioactive sources can be easily loaded and unloaded. The device reserves of various advantages of patent 98119833.3; a rearmounted machine can not generate source clamping phenomena or accumulated error when driving radioactive sources, and the security of rearmounted treatment is greatly improved.
Description
Technical field
What the present invention relates to is the let-off gear(stand) of rearmounted radiation source.In patent 98119833.3 described devices, because ring groove wheel, dummy pipe, rear tube and belt guide wheel all are hard-wired, the radioactive source drive mechanism can be rotated flexibly, slit between conduit and ring groove wheel, belt guide wheel and the conduit is very little simultaneously, just the requirement on machining accuracy to each parts is very high for this, the assembling of equipment is also relatively more difficult, and especially to driving the radioactive source below 1 millimeter, the processing of each parts and assembling are just difficult more.
Background technology the objective of the invention is to: promptly kept the various superioritys in the patent 98119833.3, afterloading unit can have been adapted to drive more tiny radioactive source.Can accomplish to make the source drive mechanism to rotate flexibly, the slit between stem piece and ring groove wheel, belt guide wheel and the stem piece is very little, and it is to be in the self adaptation state that stem piece and ring groove wheel are in operation.Assembling adjustment is simultaneously got up very easy, and the loading and unloading radioactive source is also more convenient.
Reaching the object of the invention technical scheme is: a kind of actuating device that can drive more tiny rearmounted radiation source safely, this device comprises: a ring groove wheel is set, the side of ring groove wheel is provided with the preceding stem piece and the back stem piece of band guide rail respectively, guide rail is contained in the groove of ring groove wheel, the outside of ring groove wheel packs tightly with belt by the belt guide wheel, article one, an end of the specific length radioactive source steel wire rope that has a radioactive substance passes through in groove, by frictional drive, fixedly install a master gear above the ring groove wheel, ring groove wheel is by drive motors control.A guide block bracket institution of being made up of guide block carrier base, guide block axle, spiral duct and serpentine pipe overcoat is set, dummy pipe and rear tube are set on the guide block carrier base, and radioactive source is extracted by the stem piece that is supported by the guide block bracket institution from the groove of sheave.A wheel bracket mechanism that is made up of wheel bracket seat, arc shaped groove, support shaft, guide wheel shaft, wheel bracket seat fixed screw is set, and the belt guide wheel can be adjusted belt guide wheel and the gap of stem between the piece easily by wheel bracket mechanism.Three ring position-limit mechanisms of being made up of position limited gear, interior ring, band landslide and the middle ring of block, outer annular gear, toothed position limit arm, spacing stage clip, compression spring sleeve and compression spring sleeve fixed screw are set, position limit arm is provided with a limited post, interior ring and outer annular gear are fixed on the ring groove wheel, in ring can interior ring and outside rotate between the annular gear, position limited gear is meshed with master gear.End at rear tube is provided with an adjustable source of being made up of center microswitch, rail plate, slip cap, bolt and contact pilotage to the center stopping means, and the center microswitch is fixed on the slip cap on the rail plate.Be provided with one by the positioner that goes out the source that prevents out the overlength that source position limited inching switch and microswitch support form.The anglec of rotation that a rotary encoder is used for detecting drive motors is set.On dummy pipe, be provided with one and go out the source location checkout gear by what go out that the source detects that photoswitch and photoswitch support form.A radiation protection jar is set, and dummy pipe therefrom passes through, and forms Z-shaped in the radiation protection jar.A treatment catheter extension is set, in order to be connected with the intravital treatment pipeline of insertion people.
Summary of the invention
Method of the present invention is achieved in that
One, guide block bracket institution and stem piece at first are installed:
1. ring groove wheel is installed on the drive motors axle.
2. the piece that will have its source is installed on the guide block axle on the guide block carrier base, and the stem piece can rotate on the guide block axle, and the guide rail on the stem piece is contained in the groove of ring groove wheel.
3. couple together with will have its source piece and guide block carrier base of spiral duct and serpentine pipe overcoat,, radially adjust the gap between stem piece and ring groove wheel, make it to reach ideal position, then the guide block carrier base is fixed because spiral duct has certain elasticity.
4. dummy pipe and rear tube and guide block carrier base are connected.
Two, wheel bracket mechanism and belt guide wheel are installed:
1. the belt guide wheel is installed on the guide wheel shaft on the wheel bracket seat, the wheel bracket seat is installed on the wheel bracket axle, the wheel bracket seat can rotate on the wheel bracket axle.
2. round wheel bracket axial adjustment wheel bracket seat, make the belt guide wheel and the gap of stem interblock reach ideal position, tighten wheel bracket seat fixed screw, the wheel bracket seat is fixed.
Three, three ring position-limit mechanisms are installed:
1. interior ring, middle ring and outer annular gear are installed on the position limited gear, in the assurance ring can interior ring and outside rotate between the annular gear.
2. the position limit arm that limited post will be housed is installed on the axle of interior ring, guarantees that the teeth on the position limit arm can be meshed with the tooth on the outer annular gear.Load onto spacing stage clip and push down position limit arm, the stage clip outside puts compression spring sleeve, with the compression spring sleeve fixed screw compression spring sleeve is fixed on the interior ring then.
Four, afterloading unit installs radioactive source by following step earlier before bringing into operation:
1. radioactive source is sent to from dummy pipe, the groove by preceding stem piece and ring groove wheel comes out from back stem piece and rear tube again.At this moment radioactive source should be adjusted to radiation protection jar center.
2. adjust the position of center microswitch, make it to push down contact pilotage, at this moment contact pilotage withstands the tail end of radioactive source, bolt is tightened again, and slip cap is fixed on the rail plate.
3. the teeth on the position limit arm are meshed with tooth on the outer annular gear, make go out source side to the time, position limit arm can not rotate, but return source side to the time, position limit arm can also rotate.
When afterloading unit goes out the source operation, drive motors drives ring groove wheel and rotates, radioactive source is sent, because the guide rail on the stem piece is contained in the groove of ring groove wheel, and stem piece and guide block carrier base are flexible coupling by resilient serpentine pipe, so when ring groove wheel some radial and axial beating that are in operation, the stem piece also can be followed the sheave operation adaptively, and stuck phenomenon can not take place.Radioactive source initially goes out the source position as radioactive source during by photoswitch.Limited post when going out the source on the position limit arm rotates along with ring groove wheel and near going out the source position limited inching switch.Because the effect of limited post can not be sent radioactive source and leaves afterloading unit.Exceed greatest length if go out the source, limited post can be run into and the source position limited inching switch, and makes the drive motors stall.
When afterloading unit goes back to the source, when radioactive source begins to calculate the distance of Hui Yuan during by photoswitch, make radioactive source get back to radiation protection jar center, at this moment the end of radioactive source should be run into the center microswitch by contact pilotage.
When changing the source, unloads afterloading unit the source operation:
1. ring in rotating, position limit arm is lifted on the landslide on the middle ring, makes the position of the block on the ring in the position limit arm arrival, and teeth and the tooth on the outer annular gear on the position limit arm are broken away from, and position limit arm just can freely rotate on the axle of interior ring like this.
2. make afterloading unit go out the source,, do not stop so do not have when unloading the source because at this moment position limit arm can freely rotate on the axle of interior ring by the length of whole radioactive source.
Because of radioactive source is to move in the pipeline of a sealing, so can not block the source phenomenon.
Characteristics of the present invention are:
1. make afterloading unit can drive more tiny radioactive source.
2. the adjustment of radioactive source export agency is simple.
3. afterloading unit can not produce cumulative error when operation.
4. can prevent the generation of card source accident.
5. belt of this device and the frictional force between the radioactive source are fixed constants, and frictional force can be transferred very greatly, and adjust easily, radioactive source stable.
6. whole apparatus structure is simple.
7. the loading and unloading source electrode is for convenient.
Description of drawings
A kind of example of this deriving device of remote after-loading intracavitary unit is described with reference to the accompanying drawings.
Accompanying drawing: Fig. 1 is the deriving device of remote after-loading intracavitary unit overall schematic.
Fig. 2 is the deriving device of remote after-loading intracavitary unit schematic side view.
Fig. 3 is outer annular gear sketch map.
Fig. 4 is three ring position-limit mechanism sketch maps.
Ring sketch map among Fig. 5.
Fig. 6 position limit arm sketch map.
Fig. 7 guide block bracket institution sketch map.
Fig. 8 wheel bracket structural scheme of mechanism.
Fig. 9 piece sketch map that has its source.
Figure 10 is that adjustable source is to center stopping means sketch map.
The specific embodiment
Preceding stem piece (30) and back stem piece (31) are installed on the guide block axle (32), preceding stem piece (30) and back stem piece (31) can be gone up rotation at guide block axle (32), and the guide rail (42) before making on stem piece (30) and the back stem piece (31) is contained in the groove (24) of ring groove wheel (1).With spiral duct (38) (40) and serpentine pipe overcoat (39) (41) preceding stem piece (30) and back stem piece (31) are coupled together with guide block carrier base (29).Gap before radially adjusting between stem piece (30) and back stem piece (31) and the ring groove wheel (1) makes it to reach ideal position, then guide block carrier base (29) is fixed on the supporting plate (28).Dummy pipe (4) and rear tube (3) are connected with guide block carrier base (29).Wheel bracket axle (34) is fixed on the supporting plate (28), belt guide wheel (5) is installed on the guide wheel shaft (35) on the wheel bracket seat (33), wheel bracket seat (33) can be gone up at wheel bracket axle (34) and rotate.Adjust wheel bracket seat (33) round wheel bracket axle (34), make the gap between belt guide wheel (5) and stem piece (31) reach ideal position, tighten the wheel bracket seat fixed screw (37) in the arc shaped groove (36), wheel bracket seat (33) is fixed on the supporting plate (28).Interior ring (10), middle ring (11) and outer annular gear (12) are installed on the position limited gear (13), ring in the assurance (11) can interior ring (10) and outside rotate between the annular gear (12).Position limited gear (13) is fixed on the supporting plate (28) by axle (27), and position limited gear (13) can rotate around axle (27).Be provided with limited post (9) on the position limit arm (43) of band teeth (49), in rotating during ring (11), position limit arm (43) is lifted on landslide (47) on the middle ring (11), make the position of the block (48) on the ring (11) in position limit arm (43) arrival, teeth (49) and the tooth on the outer annular gear (12) on the position limit arm (43) are broken away from, and position limit arm (43) just can rotate round axle (27) like this.If ring (11) in the anti-phase again rotation can make the teeth (49) on the position limit arm (43) be meshed with tooth on the outer annular gear (12).Spacing stage clip (45) is housed on position limit arm (43) pushes down position limit arm (43), spacing stage clip (45) outside puts compression spring sleeve (44), uses compression spring sleeve fixed screw (46) that compression spring sleeve (44) is fixed on the axle of interior ring (10) then.Position limited gear (13) and master gear (2) engagement, master gear (2) and coaxial connection of ring groove wheel (1).Ring groove wheel (1) is by drive motors (25) control, and the rear axle of drive motors (25) is connected with rotary encoder (26), and rotary encoder (26) is used for detecting the anglec of rotation of drive motors (25).Stem piece (30) and back stem piece (31) before the side of ring groove wheel (1) is provided with respectively, the outside of ring groove wheel (1) packs tightly with belt (6) by belt guide wheel (5), radioactive source steel wire rope (18) is entered from dummy pipe (4), by preceding spiral duct (38), preceding stem piece (30), in the groove (24) of ring groove wheel (1), pass through, then from back stem piece (31), rear screw conduit (40), come out to enter rear tube (3).Radioactive source (18) is to lean on frictional drive.In order to prevent the leakage of lonizing radiation, be provided with a radiation protection jar (16), dummy pipe (4) therefrom passes through, and forms Z-shaped in radiation protection jar (16).In order to detect the position of radioactive source (18), be provided with a photoswitch (15) and be placed on the photoswitch support (14).Leave afterloading unit in order to prevent that radioactive source (18) is sent, be provided with one and be placed in and go out source position limited inching switch (8) on the microswitch support (7).For with insert the intravital pipeline of people and join, be provided with treatment catheter extension (17) at the front end of dummy pipe (4).In order to guarantee that radioactive source (18) can accurately get back to radiation protection jar (16) center, an adjustable source of being made up of center microswitch (21), rail plate (23), slip cap (20), bolt (19) and contact pilotage (22) is set to the center stopping means at the end of rear tube (3).Center microswitch (21) is fixed on the slip cap (20).
This device also is applicable to the situation of a plurality of driver elements.
This device is specially adapted to drive more tiny rearmounted radiation source, makes the adjustment of equipment and loading and unloading radioactive source easier, and the radioactive source that is in operation can not produce cumulative error, can not block the source accident yet.
Claims (8)
1. actuating device that can drive more tiny rearmounted radiation source safely, this device comprises: a ring groove wheel is set, the side of ring groove wheel is provided with the preceding stem piece and the back stem piece of band guide rail respectively, guide rail is contained in the groove of ring groove wheel, the outside of ring groove wheel packs tightly with belt by the belt guide wheel, article one, an end of the specific length radioactive source steel wire rope that has a radioactive substance passes through in groove, by frictional drive, fixedly install a master gear above the ring groove wheel, ring groove wheel is by drive motors control, it is characterized in that: be provided with one by the guide block carrier base, the guide block axle, the guide block bracket institution that spiral duct and serpentine pipe overcoat are formed, spiral duct one end be connected with preceding stem piece and back stem piece respectively, and the other end is connected with the guide block carrier base, dummy pipe and rear tube are set on the guide block carrier base, radioactive source imports from dummy pipe, enter in the groove of sheave by spiral duct with by the preceding stem piece that the guide block bracket institution supports, derive from rear tube by the back stem piece and the spiral duct that support by the guide block bracket institution again, also be provided with one by the wheel bracket seat, arc shaped groove, the wheel bracket axle, guide wheel shaft, the wheel bracket mechanism that wheel bracket seat fixed screw is formed, when the gap of adjusting between belt guide wheel and the stem piece, unclamp wheel bracket seat fixed screw, the wheel bracket seat is rotated round the wheel bracket axle, rotate thereby drive the belt guide wheel, when reaching satisfied belt guide wheel, tighten wheel bracket seat fixed screw with the gap of having its source between the piece.
2. device according to claim 1, it is characterized in that: three ring position-limit mechanisms of being made up of position limited gear, interior ring, band landslide and the middle ring of block, outer annular gear, toothed position limit arm, spacing stage clip, compression spring sleeve and compression spring sleeve fixed screw are set, position limit arm is provided with a limited post, interior ring and outer annular gear are fixed on the ring groove wheel, in ring can interior ring and outside rotate between the annular gear, position limited gear is meshed with master gear.
3. device according to claim 1, it is characterized in that: the end at rear tube is provided with an adjustable source of being made up of center microswitch, rail plate, slip cap, bolt and contact pilotage to the center stopping means, and the center microswitch is fixed on the slip cap on the rail plate.
4. device according to claim 1 is characterized in that: be provided with one by the positioner that goes out the source that prevents out the overlength that source position limited inching switch and microswitch support form.
5. device according to claim 1 is characterized in that: the anglec of rotation that a rotary encoder is used for detecting drive motors is set.
6. device according to claim 1 is characterized in that: be provided with one and go out the source location checkout gear by what go out that the source detects that photoswitch and photoswitch support form on dummy pipe.
7. device according to claim 1 is characterized in that: a radiation protection jar is set, and dummy pipe therefrom passes through, and forms Z-shaped in the radiation protection jar.
8. device according to claim 1 is characterized in that: a treatment catheter extension is set, in order to be connected with the intravital treatment pipeline of insertion people.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01129300 CN1233430C (en) | 2001-06-21 | 2001-06-21 | Deriving device of remote after-loading intracavitary unit |
| PCT/CN2001/001629 WO2003000342A1 (en) | 2001-06-21 | 2001-12-14 | Rearmounted radiation source guiding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01129300 CN1233430C (en) | 2001-06-21 | 2001-06-21 | Deriving device of remote after-loading intracavitary unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1322578A CN1322578A (en) | 2001-11-21 |
| CN1233430C true CN1233430C (en) | 2005-12-28 |
Family
ID=4669063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01129300 Expired - Lifetime CN1233430C (en) | 2001-06-21 | 2001-06-21 | Deriving device of remote after-loading intracavitary unit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1233430C (en) |
| WO (1) | WO2003000342A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021066648A1 (en) * | 2019-09-30 | 2021-04-08 | Nucletron Operations B.V. | Selector for remotely medical device / afterloading |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8096700B2 (en) | 1999-11-24 | 2012-01-17 | Impulse Devices Inc. | Heat exchange system for a cavitation chamber |
| CN104511097B (en) * | 2014-12-22 | 2017-07-07 | 天津大学 | High dose rate multichannel afterloader indexing head mechanism |
| CN105194805B (en) * | 2015-10-20 | 2018-03-20 | 江苏海明医疗器械有限公司 | A kind of radioactive source conveying device of nucleic afterloader |
| CN107837465B (en) * | 2017-11-21 | 2024-05-14 | 西安大医集团股份有限公司 | Source guiding device and system |
| CN114053601B (en) * | 2021-11-12 | 2023-07-28 | 江苏海明医疗器械有限公司 | Self-correcting device for length of outlet source of rear-loading radiation therapy apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190602A (en) * | 1997-02-14 | 1998-08-19 | 王力平 | Device for correcting operation accumulative error of rear installed radiation source |
| CN1069063C (en) * | 1998-09-18 | 2001-08-01 | 王力平 | Rearmounted radiation source gearing device |
-
2001
- 2001-06-21 CN CN 01129300 patent/CN1233430C/en not_active Expired - Lifetime
- 2001-12-14 WO PCT/CN2001/001629 patent/WO2003000342A1/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021066648A1 (en) * | 2019-09-30 | 2021-04-08 | Nucletron Operations B.V. | Selector for remotely medical device / afterloading |
| NL2023918B1 (en) * | 2019-09-30 | 2021-05-27 | Nucletron Operations Bv | Selector for Remotely Medical Device / Afterloading |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003000342A1 (en) | 2003-01-03 |
| CN1322578A (en) | 2001-11-21 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 300384 Tianjin Nankai District Huayuan Bihuali 24-2-102 Patentee after: Wang Liping Address before: 300060. East Lake 23-57-403, Hexi District, Tianjin Patentee before: Wang Liping |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20051228 |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Wang Liping Document name: Notice of expiration and termination of patent right |