CN109874219B - Dental X-ray machine and packaging method thereof - Google Patents
Dental X-ray machine and packaging method thereof Download PDFInfo
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- CN109874219B CN109874219B CN201910260061.4A CN201910260061A CN109874219B CN 109874219 B CN109874219 B CN 109874219B CN 201910260061 A CN201910260061 A CN 201910260061A CN 109874219 B CN109874219 B CN 109874219B
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 105
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims description 86
- 238000009434 installation Methods 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000004846 x-ray emission Methods 0.000 claims description 3
- 239000000306 component Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000012858 packaging process Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 208000014151 Stomatognathic disease Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Abstract
The invention provides a dental X-ray machine, which comprises a top sealing cover sealing assembly, an insulating cover, a voltage doubling PCB assembly, an aluminum plate shell, a cylindrical X-ray tube shell and a beam light tube, wherein a closed cavity is formed after the X-ray tube shell is assembled; the beam light tube mounting table is connected with a tube opening nut for mounting and fixing the beam light tube; a U-shaped transparent sealing cup is also arranged between the tube opening nut and the beam tube mounting table in a flip-chip manner, after transformer insulating oil is injected into the closed cavity, the U-shaped transparent sealing cup is inserted into the ray guiding-out hole so as to further raise and overflow the liquid level and extrude bubbles around the threaded connection hole, and the U-shaped transparent sealing cup is also used for observing whether gas exists in the X-ray tube shell after the transformer insulating oil is injected; the invention also provides a packaging method of the dental X-ray machine.
Description
[ field of technology ]
The invention relates to an X-ray tube manufacturing technology, in particular to a dental X-ray machine and a packaging method thereof.
[ background Art ]
Dental hospitals and clinics are places integrating examination, diagnosis and treatment, and in many oral treatment operations, dental X-ray machines are often required, and in the process of diagnosing and treating dental diseases, dental X-ray machines increasingly play a role.
The X-ray generator component is a core component of a dental X-ray machine, the inside of the X-ray generator component is composed of a step-up transformer, a rectifying circuit and an X-ray tube, the working voltage of the X-ray tube component is about 70KV, when the X-ray tube component works, electrons emitted by a filament of a cathode of the X-ray tube impact a metal target surface of an anode to generate high-voltage X-rays after being accelerated by high voltage, in order to generate the X-rays, tens of thousands of volts of voltage needs to be applied to the X-ray tube, and the high-speed electrons bombard the metal target surface, 1% of the electrons are converted into the X-rays, and 99% of the X-rays are converted into heat.
Therefore, insulation and heat dissipation in the X-ray tube are necessary, and the existing heat dissipation mode of filling insulating oil in the high-voltage environment of the cylinder, namely, adopting a vacuum oiling process to ensure that the air content in the assembly is as small as possible, is one of the most effective insulation measures at present. In specific operation, the existing X-ray generator component is packaged in an oiling mode in the whole oil drum, in order to ensure no bubbles after oiling, the whole X-ray generator component is soaked in the oil drum for oiling, the oil level is over the component, the whole component can be ensured to be full of oil when the air is deflated, and then the oil drum is sealed by a plug.
However, the oil filling port of the existing X-ray generator component is basically flush and is arranged at the surface position of the shell, and the sealing mode of the oil filling port samples a common rubber plug; when oiling, take to follow the oiling mouth alone and annotate the oiling, the oil level descends when gassing, because oiling mouth and shell surface parallel and level set up, lead to transformer oil to fill not full subassembly, and gas gets into the subassembly.
In addition, because whole X-ray tube subassembly shell all soaks at the oil drum, need extra more oil, remain a lot of transformer oil after the oiling is accomplished, because the X-ray subassembly shell soaks in transformer oil, impurity such as iron fillings in some fixed screw holes of shell, dust can all fall to the transformer oil in the oil drum, lead to remaining impurity in the subassembly to mix together with the transformer oil of injection, this mode can not carry out oil circulation, lead to transformer oil pollution serious, only need long-time filtration just can reach the operation requirement when retrieving again, cause manufacturing cost to improve greatly. Meanwhile, in the process of generating X-rays, insulating oil in a sealing state of the existing X-ray generator assembly is heated to expand, so that the expanded insulating oil generates larger pressure on the sealing device, and the sealing device is not tight due to the larger pressure, so that oil leakage is generated.
[ invention ]
The dental X-ray machine and the packaging method thereof provided by the invention have the advantages of simple and reliable structure, convenience in air exhaust and observation effect, high efficiency, good reliability and low energy consumption, and can be used for directly exhausting the X-ray tube assembly, greatly shortening the oil filling time, improving the production efficiency and reducing the production cost.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the dental X-ray machine comprises a top sealing cover sealing assembly, an insulating cover, a voltage doubling PCB assembly, an aluminum plate shell, a cylindrical X-ray tube shell and a light beam tube, wherein the top sealing cover sealing assembly, the insulating cover and the voltage doubling PCB assembly are sequentially assembled in the X-ray tube shell and then fixed by the aluminum plate shell in a sealing manner;
the X-ray tube shell is assembled to form a closed cavity, a beam tube mounting table which is higher than the outer edge of the closed cavity and is arranged in a flush manner on the outer end face is arranged on the front side of the X-ray tube shell in an outwards protruding manner, and a ray guiding hole which is higher than the outer edge of the closed cavity and is communicated with the closed cavity and is convenient for guiding X-rays in the X-ray tube shell and injecting insulating oil into the closed cavity is formed in the center of the beam tube mounting table;
the beam tube mounting table is connected with a tube opening nut for mounting and fixing the beam tube, and a threaded connection hole communicated with the ray guiding-out hole is formed in the center of the tube opening nut;
a U-shaped transparent sealing cup which is used for further raising and overflowing the liquid level of the transformer insulating oil and extruding bubbles around the threaded connection hole is also inversely fixed between the nozzle nut and the beam tube mounting table, and is also used for observing whether gas exists inside the X-ray tube shell after the transformer insulating oil is injected when the nozzle nut which corresponds to the flat-placed X-ray tube shell is positioned at the highest position of the horizontal plane, the transformer insulating oil is injected from the threaded connection hole and the ray guiding-out hole in a vacuum state, and the liquid level of the transformer insulating oil after the vacuum is released is not lower than the lowest position of the threaded connection hole;
the annular lead sheet for controlling the X-ray emission and the optical filter for filtering the X-rays are sequentially sleeved in the threaded connecting hole of the barrel opening nut, and the annular lead sheet and the optical filter are fixed at the bottom end of the threaded connecting hole of the barrel opening nut after the rear end of the beam light barrel is in threaded connection with the threaded connecting hole.
Further, the periphery of the top end of the U-shaped transparent sealing cup is provided with a circular skirt, a stepped groove matched with the circular skirt is formed at the corresponding ray guiding-out hole port, and the thickness of the circular skirt is higher than the depth of the stepped groove.
Further, the U-shaped transparent sealing cup is sleeved with an O-shaped ring which is positioned at the rear side of the annular skirt edge and is in contact with the side surface of the bottom of the stepped groove, and the side surface of the corresponding stepped groove bottom is provided with a concave ring groove which is convenient for installing and fixing the O-shaped ring.
Further, a hard pressing and fixing piece which is positioned at the rear side of the bottom of the nozzle nut and used for locking and fixing the U-shaped transparent sealing cup at the position of the ray guiding-out hole is further arranged on the upper side of the annular skirt of the U-shaped transparent sealing cup.
Further, the hard press-fixing piece is annular and the diameter is smaller than the internal diameter of the threaded connection hole of the barrel head nut, the outer periphery Xiang Xiangwai of the hard press-fixing piece extends and is provided with at least two pressing convex edges which are uniformly distributed on the outer periphery and the outer edge of which is positioned in the threaded connection hole, the bottom side wall of the threaded connection hole of the corresponding barrel head nut extends inwards and is provided with a positioning annular with the diameter larger than the diameter of the hard press-fixing piece and limiting each pressing convex edge to pass through, the positioning annular is provided with a notch groove which is convenient for each pressing convex edge to pass through the threaded connection hole, the rear side of the positioning annular is also provided with a plane pressing buckling groove which is convenient for each pressing convex edge on the hard press-fixing piece to pass through the notch groove and is rotationally embedded and buckled on the rear side of the positioning annular by a certain angle, and the joint of the plane pressing buckling groove and the notch groove is also provided with an inclined leading-in surface which is convenient for the pressing of the hard press-fixing piece into the plane pressing buckling groove, and the rotating a certain angle to be abutted against the annular skirt edge of the U-shaped transparent sealing cup so as to press and buckle the U-shaped transparent sealing cup to be fixed on the radiation guiding-out hole.
Further, a locating hole which is matched with the jackscrew and used for limiting the hard pressing piece rotating for a certain angle to slide out from the plane pressing buckle groove at the rear side of the locating circular ring is also formed in the beam barrel mounting table corresponding to one notch groove at the inner side of the barrel opening nut.
Further, the back side of the positioning ring of the barrel opening nut is also provided with at least one positioning groove which is convenient to be in positioning connection with the beam light barrel installation table, and the corresponding beam light barrel installation table surface is provided with a positioning block matched with each positioning groove.
Further, the hard pressing and fixing piece is a rigid metal piece body, and three pushing holes which are uniformly distributed in the circumferential direction and are convenient for clamping the clamping and fixing piece of the caliper to rotate are also formed in the hard pressing and fixing piece.
Further, at least two lugs uniformly distributed on the periphery of the circumference extend from the outer edge of the barrel opening nut, through holes are formed in each lug, convex columns matched with each lug and provided with threaded holes are arranged on the outer edge of the corresponding beam barrel installation table in an extending mode, and the barrel opening nut is fastened to the threaded holes of each convex column on the outer edge of the beam barrel installation table through holes in each lug in a locking mode through screws.
A method of packaging a dental X-ray machine, comprising the steps of:
firstly, when the dental X-ray machine is assembled, a positioning groove at the rear side of a barrel opening nut corresponds to a positioning block on a beam barrel installation table, then a screw penetrates through a through hole on each lug on the barrel opening nut to be matched with a threaded hole on a corresponding convex prism on the outer edge of the beam barrel installation table, and the barrel opening nut is fixed on the beam barrel installation table;
step two, sequentially assembling the top sealing cover sealing assembly, the insulating cover and the voltage doubling PCB assembly in the X-ray tube shell, and sealing and fixing the top sealing cover sealing assembly, the insulating cover and the voltage doubling PCB assembly by an aluminum plate shell;
thirdly, horizontally placing the assembled whole dental X-ray machine in a vacuum sealing box, wherein a barrel opening nut is positioned at the highest position of a horizontal plane and is opposite to an oil filling port in the vacuum sealing box, and closing a cover body on the vacuum sealing box;
step four, a power supply of a vacuum pump is turned on, an extraction valve arranged on an air pipe between the vacuum sealing box and the vacuum pump is turned on, and after air is exhausted, the extraction valve is turned off after the barometer on the vacuum sealing box shows that the vacuum degree reaches minus 0.06 MPA;
step five, then, opening an oil inlet valve arranged on a communicating pipeline with the oil filling port, slowly injecting transformer insulating oil into a closed cavity of the X-ray tube shell from the oil filling port through the threaded connecting hole and the ray guiding hole in a negative pressure vacuum state, and closing the oil inlet valve when the oil level is over a cylinder port nut;
step six, opening a release valve arranged on the air pipe, opening a cover body on the vacuum sealing box when the barometer on the vacuum sealing box shows that the vacuum degree is close to zero, sleeving an O-shaped ring at the rear side of the circular skirt of the U-shaped transparent sealing cup when the liquid level of the transformer insulating oil after the vacuum is released is not lower than the lowest position of the threaded connection hole, inserting the inverted U-shaped transparent sealing cup into the ray guiding hole through the threaded connection hole of the nozzle nut to further raise and overflow the liquid level of the transformer insulating oil in the threaded connection hole and extrude bubbles around the threaded connection hole, and observing whether gas exists in the X-ray tube shell after the transformer insulating oil is injected by using the U-shaped transparent sealing cup, wherein the fact that no gas exists indicates that the X-ray tube shell is successfully injected with oil;
step seven, a pushing hole on a clamping hard pressing and fixing piece is utilized, after each pressing convex edge on the hard pressing and fixing piece passes through a notch groove on a positioning circular ring on the inner side of a threaded connection hole, the clamping jaw drives the hard pressing and fixing piece to rotate by a certain angle and is embedded and buckled in a plane pressing and buckling groove on the rear side of the positioning circular ring, and meanwhile the lower side surface of the hard pressing and fixing piece is abutted against the circular skirt edge of the U-shaped transparent sealing cup, so that the U-shaped transparent sealing cup is rigidly pressed and buckled and fixed at a ray guiding hole;
step eight, installing jackscrews from a notch groove at the inner side of a barrel opening nut at the position corresponding to a positioning hole on the beam barrel mounting table, screwing the jackscrews into the positioning hole to limit the hard pressing and fixing piece rotating by a certain angle to slide out from a plane pressing and fixing groove at the rear side of the positioning circular ring;
and step nine, finally, sequentially sleeving an annular lead sheet and an optical filter in a threaded connection hole of a barrel opening nut, and screwing the beam light barrel to complete the whole packaging connection.
The beneficial effects of the invention are as follows:
according to the invention, a U-shaped transparent cover cup is inverted between a barrel opening nut and a beam barrel mounting table, after transformer insulating oil is injected into a closed cavity of the whole assembled dental X-ray machine, the U-shaped transparent cover cup is inserted into a ray guiding hole to further raise and overflow the liquid level and extrude bubbles around a threaded connection hole, and meanwhile, the U-shaped transparent cover cup is convenient for observing whether gas exists in an X-ray tube shell after the transformer insulating oil is injected; greatly shortens the oil filling time, improves the production efficiency and reduces the cost.
According to the packaging method corresponding to the dental X-ray machine, the whole assembly is not required to be soaked in the oil drum of the vacuum sealing box during packaging, transformer insulating oil is only required to be slowly injected into the closed cavity of the X-ray tube shell from the protruding threaded connection hole and the ray guiding-out hole, the transformer insulating oil is not required to be additionally used for the whole assembly after passing through the barrel opening nut, whether the whole assembly leaks oil or not can be obviously seen, the subsequent leakage test procedure is reduced, and the packaging process is time-saving, efficient, energy-saving and environment-friendly.
In addition, when the transformer insulating oil is injected, as the oil injection process needs to be carried out in a vacuum state, the volume of the transformer insulating oil can be increased in a vacuum environment, and the transformer insulating oil is slowly deflated after the oil injection is finished, at the moment, the volume of the oil is reduced to some extent, and the oil level is reduced, the height of the nozzle nut designed by the invention ensures that the highest oil level of the transformer insulating oil after deflation is not lower than the lowest installation position of the nozzle nut, and the gas is prevented from entering the closed cavity of the dental X-ray machine again; when the U-shaped transparent sealing cover cup penetrates through the threaded connection hole of the barrel opening nut and is inserted into the ray guiding hole after the vacuum sealing box is opened, the oil surface is further raised and overflows due to embedding and extrusion of the U-shaped transparent sealing cover, the oil surface is prevented from rotating under high pressure due to the fact that the oil surface is over the upper port of the threaded connection hole of the barrel opening nut, no air is guaranteed to enter the sealed cavity of the dental X-ray machine again, the hard pressing piece is placed at the moment, the clamping hard pressing piece is clamped by the calipers and screwed down, the lower side face of the hard pressing piece is abutted to the annular skirt of the U-shaped transparent sealing cover cup, the U-shaped transparent sealing cover cup is rigidly pressed and buckled and fixed to the ray guiding hole, the hard pressing piece made of metal materials is connected through the rigid seal, and the hard pressing piece is prevented from rotating under high pressure due to the fact that the jackscrew is locked, and in the X-ray machine is in the X-ray production process, even if insulating oil in a sealed state is heated, the expanded insulating oil is produced to expand, the corresponding sealing cavity and the sealing connection position cannot be caused to be loose, and leakage of the sealing connection position can be effectively prevented.
Moreover, in the whole oiling and packaging process, the dental X-ray machine is fixed in a threaded connection manner before packaging, the X-ray tube shell is not soaked during packaging, and impurities such as scrap iron, dust and the like in some fixed screw holes on the shell can not fall into transformer insulating oil in an oil drum at all, so that pollution of the transformer insulating oil in the packaging process is effectively prevented, the packaging quality is greatly improved, and the time and the efficiency are improved.
[ description of the drawings ]
FIG. 1 is a schematic view of an exploded construction of a dental X-ray machine according to the present invention;
fig. 2 is an enlarged schematic view of a portion a in fig. 1;
FIG. 3 is an enlarged schematic view of the port nut of the present invention;
FIG. 4 is an enlarged cross-sectional view of the port nut of the present invention;
fig. 5 is a schematic diagram of an assembly structure of the vacuum sealing box at the time of oil filling according to the present invention.
The following describes the embodiments of the present invention in further detail with reference to the drawings.
[ detailed description ] of the invention
A dental X-ray machine, as shown in fig. 1 to 4, comprises a top sealing cover sealing component 1, an insulating cover 2, a voltage doubling PCB component 3, an aluminum plate shell 4, a cylindrical X-ray tube shell 5 and a beam tube 6, wherein the top sealing cover sealing component 1, the insulating cover 2 and the voltage doubling PCB component 3 are assembled in the X-ray tube shell 5 in sequence and are fixed by the sealing cover of the aluminum plate shell 4; the X-ray tube housing 5 is assembled to form a closed cavity, a beam tube mounting table 7 which is protruded outwards from the front side of the X-ray tube housing 5 and is higher than the outer edge of the closed cavity and is arranged with the outer end face flush is arranged, a ray guiding hole 70 which is higher than the outer edge of the closed cavity and is communicated with the closed cavity and is convenient for guiding X-rays in the X-ray tube housing 5 and injecting insulating oil into the closed cavity is arranged in the center of the beam tube mounting table 7; the top sealing component 1 is sequentially a top lead plate, a fastening ring and a rubber sealing cover, and the bottom of the X-ray tube shell 5 is also provided with the lead plate.
As shown in fig. 1 to 4, a barrel nut 8 for installing and fixing the beam barrel 6 is connected to the beam barrel mounting table 7, a threaded connection hole 80 communicated with the ray guiding hole 70 is arranged in the center of the barrel nut 8, three lugs 81 uniformly distributed on the periphery in the circumferential direction are extended from the outer edge of the barrel nut 8, a through hole 810 is arranged on each lug 81, a rib post 71 which is matched with each lug 81 and provided with a threaded hole is extended from the outer edge of the corresponding beam barrel mounting table 7, and the barrel nut 8 is locked and fixed on the threaded hole of each rib post 71 on the outer edge of the beam barrel mounting table 7 through the through hole 810 on each lug 81 by a screw 811; a U-shaped transparent sealing cup 9 which is fixed between the nozzle nut 8 and the beam tube mounting table 7 in a flip-chip manner, is inserted into the ray guiding hole 70 for further raising and overflowing the liquid level of the transformer insulating oil and extruding bubbles around the threaded connecting hole 80 when the nozzle nut 8 corresponding to the flat-placed assembled X-ray tube housing 5 is positioned at the highest position of the horizontal plane, transformer insulating oil is injected from the threaded connecting hole 80 and the ray guiding hole 70 in a vacuum state, and the liquid level of the transformer insulating oil after the vacuum is released is not lower than the lowest position of the threaded connecting hole 80, and the U-shaped transparent sealing cup 9 is also used for observing whether the gas exists in a sealed cavity inside the X-ray tube housing 5 after the transformer insulating oil is injected; an annular lead sheet 10 for controlling the X-ray emission and an optical filter 11 for filtering the X-ray are sequentially sleeved in a threaded connection hole 80 of a barrel opening nut 8, and the rear end of the beam barrel 6 is in threaded connection with the threaded connection hole 80 and then the annular lead sheet 10 and the optical filter 11 are fastened and fixed at the bottom end of the threaded connection hole 80 of the barrel opening nut 8.
As further shown in fig. 1 and 2, the periphery of the top end of the U-shaped transparent cover cup 9 is provided with a circular skirt 90, and the corresponding port of the radiation guiding hole 70 is provided with a step groove 700 matched with the circular skirt 90, and the thickness of the circular skirt 90 is higher than the depth of the step groove 700. The U-shaped transparent sealing cup 9 is sleeved with an O-shaped ring 12 which is positioned at the rear side of the annular skirt 90 and is contacted with the bottom side surface of the stepped groove 700 for sealing the ray guiding-out hole 70, and the bottom side surface of the corresponding stepped groove 700 is provided with a concave ring groove 701 which is convenient for installing and fixing the O-shaped ring 12; the upper side of the circular skirt 90 of the U-shaped transparent cover cup 9 is also provided with a hard pressing and fixing piece 13 which is positioned at the rear side of the bottom of the nozzle nut 8 and is used for locking and fixing the U-shaped transparent cover cup 9 at the position of the ray guiding-out hole 70.
As further shown in fig. 2 to 4, the hard pressing plate 13 is in a circular ring shape and has a diameter smaller than the inner diameter of the threaded connection hole 80 of the nozzle nut 8, three pressing convex edges 130 uniformly distributed in the outer circumference direction and having the outer edges located in the threaded connection hole 80 are arranged on the outer circumference direction of the hard pressing plate 13, a positioning circular ring 82 having a diameter larger than the diameter of the hard pressing plate 13 and limiting the passage of each pressing convex edge 130 is arranged on the bottom side wall of the threaded connection hole 80 of the corresponding nozzle nut 8, a notch groove 820 is arranged on the positioning circular ring 82, each pressing convex edge 130 is convenient to pass through the threaded connection hole, a plane pressing buckling groove 821 is arranged on the rear side of the positioning circular ring 82 and is convenient for being embedded and buckled on the rear side of the positioning circular ring 82 after each pressing convex edge 130 on the hard pressing plate 13 passes through the notch groove 820, an inclined leading-in surface 822 is also arranged at the joint of the plane pressing buckling groove 821 and the notch groove 820, and the pressing convex edges 130 of the hard pressing plate 13 is convenient for being pushed and buckled on the transparent cup 9 by rotating a certain angle to lead out the transparent cup 70 to the transparent cup 9. Wherein, the hard pressing and fixing piece 13 is a rigid metal sheet, and three pushing holes 131 which are uniformly distributed along the circumferential direction and are convenient for clamping the caliper and rotating the hard pressing and fixing piece are also arranged on the hard pressing and fixing piece 13; in addition, a positioning hole 72 which is matched with the jackscrew 14 and used for limiting the hard pressing and fixing piece 13 rotating for a certain angle to slide out from a plane pressing and buckling groove 821 on the rear side of the positioning circular ring 82 is also arranged on the beam barrel mounting table 7 corresponding to one notch 820 on the inner side of the barrel opening nut 8; and, the back side of the positioning ring 82 of the nozzle nut 8 is also provided with three positioning grooves 823 which are convenient to be positioned and connected with the beam tube mounting table 7, and the corresponding beam tube mounting table 7 is provided with square positioning blocks 73 matched with the positioning grooves 823.
Due to the fact that the U-shaped transparent sealing cup 9 is inverted between the nozzle nut 8 and the beam tube mounting table 7, after transformer insulating oil is injected into the closed cavity of the whole assembled dental X-ray machine, the U-shaped transparent sealing cup 9 is inserted into the ray guiding-out hole 70, so that the liquid level at the port of the nozzle nut 8 is further raised and overflowed, bubbles around the threaded connection hole 80 are extruded, meanwhile, the U-shaped transparent sealing cup 9 is convenient for observing whether gas exists in the X-ray tube shell after transformer insulating oil is injected, oil filling time is greatly shortened, production efficiency is improved, and cost is reduced.
The packaging method of the dental X-ray machine, as shown in fig. 1 to 5, comprises the following steps:
firstly, when the dental X-ray machine is assembled, a positioning groove 823 on the rear side of a barrel nut 8 corresponds to a positioning block 73 on a beam barrel installation table 7, then a screw 811 penetrates through a through hole 810 on each lug 81 on the barrel nut 8 to be matched with a threaded hole on a corresponding convex prism 71 on the outer edge of the beam barrel installation table 7, and the barrel nut 8 is fixed on the beam barrel installation table 7;
step two, after the top sealing cover sealing component 1, the insulating cover 2 and the voltage doubling PCB component 3 are assembled in the X-ray tube shell 5 in sequence, the top sealing cover sealing component is fixed by a cylindrical aluminum plate shell 4;
thirdly, as shown in fig. 5, the assembled whole dental X-ray machine is horizontally placed in a vacuum sealing box 15, wherein a nozzle nut 8 is positioned at the highest position of a horizontal plane and faces an oil filling port 16 in the vacuum sealing box 15, and a cover body on the vacuum sealing box 15 is closed;
step four, a power supply of a vacuum pump is turned on, an extraction valve 18 arranged on an air pipe 17 between the vacuum sealing box 15 and the vacuum pump (not shown in the figure) is turned on, after air is exhausted, an air pressure gauge 19 on the vacuum sealing box 15 shows that the vacuum degree reaches minus 0.06MPA, and the extraction valve 18 is turned off;
step five, then, opening an oil inlet valve 20 arranged on a pipeline communicating with the oil filling port 16, slowly injecting transformer insulating oil into a closed cavity of the X-ray tube shell 5 from the oil filling port 16 through a threaded connecting hole 80 and a ray guiding hole 70 under a negative pressure vacuum state, and closing the oil inlet valve 20 when the oil level is over a barrel port nut 8;
step six, opening a release valve 21 arranged on the inner side of an extraction valve 18 on the air pipe 18, opening a cover body on the vacuum seal box 15 when the air gauge 19 on the vacuum seal box 15 shows that the vacuum degree is close to zero, sleeving an O-shaped ring 12 on the rear side of the circular skirt 90 of the U-shaped transparent cover cup 9 when the liquid level of transformer insulating oil after the vacuum is released is not lower than the lowest position of the threaded connection hole 80, then inserting the inverted U-shaped transparent cover cup 9 into the ray guide hole 70 through the threaded connection hole 80 of the nozzle nut 8 so that the liquid level of the transformer insulating oil in the threaded connection hole 80 is further raised and overflowed, extruding bubbles around the threaded connection hole 80, and observing whether gas exists in the X-ray tube shell 5 after the transformer insulating oil is injected by using the U-shaped transparent cover cup 9, wherein no oil injection indicates that the X-ray tube shell is successful;
step seven, then, after each pressing convex edge 130 on the hard pressing sheet 13 passes through the notch groove 820 on the positioning circular ring 82 at the inner side of the threaded connection hole 80 by utilizing the pushing hole 131 on the clamping and clamping hard pressing sheet 13 of the caliper, the caliper drives the hard pressing sheet 13 to rotate by a certain angle and be embedded and buckled in the planar buckling groove 821 at the rear side of the positioning circular ring 82, and meanwhile, the lower side surface of the hard pressing sheet 13 is abutted against the circular skirt edge 90 of the U-shaped transparent sealing cup 9, so that the U-shaped transparent sealing cup 9 is rigidly buckled and fixed at the position of the ray guiding hole 70;
step eight, installing jackscrews 14 from a notch groove 820 at the inner side of the barrel opening nut 8 at the position corresponding to the positioning hole 72 on the beam barrel mounting table 7, screwing the jackscrews 14 into the positioning hole 72 to limit the rotation of the hard pressing and fixing piece 13 with a certain angle to slide out of the plane pressing and fixing groove 821 at the rear side of the positioning circular ring 82; in the process of generating X-rays, even if the insulating oil in a sealed state is heated and expands, the expanded insulating oil generates larger pressure on the whole sealed cavity and the sealed connection part, the looseness of the sealed part corresponding to the hard pressing and fixing piece 13 cannot be caused, so that the leakage of the connection part is effectively prevented, and the reliability of the sealed connection is improved;
step nine, step eight, finally, sleeving the annular lead sheet 10 and the optical filter 11 in the threaded connection hole 80 of the barrel head nut 8 in sequence, and screwing the beam light barrel 6 to complete the whole packaging connection.
According to the packaging method corresponding to the dental X-ray machine, the whole assembly is not required to be soaked in the oil drum of the vacuum sealing box 15 during packaging, transformer insulating oil is only required to be slowly injected into the sealed cavity of the X-ray tube shell 5 from the raised threaded connecting hole 80 and the radiation guiding hole 70, the transformer insulating oil is not required to be additionally used for the whole assembly after passing through the barrel opening nut 8, whether the whole assembly leaks oil or not can be obviously seen under the vacuum condition, the subsequent leakage test procedure is reduced, and the packaging process is time-saving, efficient, energy-saving and environment-friendly.
In addition, when the transformer insulating oil is injected, as the oil injection process needs to be carried out in a vacuum state, the volume of the transformer insulating oil is increased in a vacuum environment, and the oil is slowly deflated after the oil injection is completed, the volume of the oil is reduced to some extent, and the oil level is reduced, the height of the nozzle nut 8 designed by the invention ensures that the highest oil level of the transformer insulating oil after deflation is not lower than the lowest installation position of the nozzle nut 8, and the gas is prevented from entering the closed cavity of the dental X-ray machine again; when the U-shaped transparent sealing cup 9 is inserted into the ray guiding hole 70 after the vacuum sealing box 15 is opened and passes through the threaded connection hole 80 of the nozzle nut 8, the oil level is further raised and overflowed due to the embedding and extrusion of the U-shaped transparent sealing cup 9, the oil level is over the upper port of the threaded connection hole 80 of the nozzle nut 8, no air is ensured to enter the closed cavity of the dental X-ray machine again, the hard pressing piece 13 is placed at the moment, the clamping hard pressing piece is clamped by the calipers and screwed, the lower side surface of the hard pressing piece 13 is abutted against the annular skirt 90 of the U-shaped transparent sealing cup 9, the U-shaped transparent sealing cup 9 is rigidly pressed and buckled at the ray guiding hole 70, and the dental X-ray machine is in a high-pressure working environment, the hard pressing piece 13 made of metal is connected through rigid sealing, so that leakage is prevented from occurring at the connecting port, and the reliability of sealing connection is improved.
Moreover, in the whole oiling and packaging process, the dental X-ray machine is fixed in a threaded connection manner before packaging, the X-ray tube shell is not soaked during packaging, and impurities such as scrap iron, dust and the like in some fixed screw holes on the shell can not fall into transformer insulating oil in an oil drum at all, so that pollution of the transformer insulating oil in the packaging process is effectively prevented, the packaging quality is greatly improved, and the time and the efficiency are improved.
The above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, but all equivalent changes according to the shape, construction and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The dental X-ray machine comprises a top sealing cover sealing assembly, an insulating cover, a voltage doubling PCB assembly, an aluminum plate shell, a cylindrical X-ray tube shell and a light beam tube, wherein the top sealing cover sealing assembly, the insulating cover and the voltage doubling PCB assembly are sequentially assembled in the X-ray tube shell and then fixed by the aluminum plate shell in a sealing manner; the method is characterized in that:
the X-ray tube shell is assembled to form a closed cavity, a beam tube mounting table which is higher than the outer edge of the closed cavity and is arranged in a flush manner on the outer end face is arranged on the front side of the X-ray tube shell in an outwards protruding manner, and a ray guiding hole which is higher than the outer edge of the closed cavity and is communicated with the closed cavity and is convenient for guiding X-rays in the X-ray tube shell and injecting insulating oil into the closed cavity is formed in the center of the beam tube mounting table;
the beam tube mounting table is connected with a tube opening nut for mounting and fixing the beam tube, and a threaded connection hole communicated with the ray guiding-out hole is formed in the center of the tube opening nut;
a U-shaped transparent sealing cup which is used for further raising and overflowing the liquid level of the transformer insulating oil and extruding bubbles around the threaded connection hole is also inversely fixed between the nozzle nut and the beam tube mounting table, and is also used for observing whether gas exists inside the X-ray tube shell after the transformer insulating oil is injected when the nozzle nut which corresponds to the flat-placed X-ray tube shell is positioned at the highest position of the horizontal plane, the transformer insulating oil is injected from the threaded connection hole and the ray guiding-out hole in a vacuum state, and the liquid level of the transformer insulating oil after the vacuum is released is not lower than the lowest position of the threaded connection hole;
the annular lead sheet for controlling the X-ray emission and the optical filter for filtering the X-rays are sequentially sleeved in the threaded connecting hole of the barrel opening nut, and the annular lead sheet and the optical filter are fixed at the bottom end of the threaded connecting hole of the barrel opening nut after the rear end of the beam light barrel is in threaded connection with the threaded connecting hole.
2. The dental X-ray machine according to claim 1, wherein a circular skirt is arranged at the periphery of the top end of the U-shaped transparent cover cup, a stepped groove matched with the circular skirt is arranged at the port of the corresponding ray guiding-out hole, and the thickness of the circular skirt is higher than the depth of the stepped groove.
3. The dental X-ray machine according to claim 2, wherein the U-shaped transparent cover cup is sleeved with an O-ring positioned at the rear side of the circular skirt and contacted with the side surface of the bottom of the stepped groove for sealing the radiation guiding hole, and the side surface of the corresponding stepped groove bottom is provided with a concave ring groove for installing and fixing the O-ring.
4. A dental X-ray machine according to claim 2, wherein the upper side of the circular skirt of the U-shaped transparent cover cup is further provided with a hard press-fixing piece located at the rear side of the bottom of the nozzle nut for locking and fixing the U-shaped transparent cover cup at the radiation guiding-out hole.
5. The dental X-ray machine according to claim 4, wherein the hard pressing piece is in a circular shape and has a diameter smaller than an inner diameter of the threaded connection hole of the nozzle nut, at least two pressing convex edges uniformly distributed on the outer circumference and the outer edge located in the threaded connection hole are arranged on the outer circumference Xiang Xiangwai of the hard pressing piece, a positioning circular ring with a diameter larger than the diameter of the hard pressing piece and capable of limiting each pressing convex edge to pass through is arranged on the bottom side wall of the threaded connection hole of the corresponding nozzle nut and extends inwards, a notch groove for allowing each pressing convex edge to pass through the threaded connection hole is arranged on the positioning circular ring, a plane pressing buckling groove for allowing each pressing convex edge on the hard pressing piece to pass through the notch groove and to be embedded and buckled on the rear side of the positioning circular ring by a certain angle is further arranged at a joint of the plane pressing buckling groove and the notch groove, and a slope leading-in surface for allowing the pressing convex edge of the hard pressing piece to enter the plane pressing buckling groove is further arranged at a joint of the plane pressing buckling groove, and the hard pressing piece rotates at a certain angle on the skirt-shaped cup abutting against the U-shaped edge to enable each pressing convex edge to pass through the notch groove to pass through the threaded connection hole, and the plane pressing buckling groove is further arranged at the plane pressing buckling groove.
6. The dental X-ray machine of claim 5, wherein a beam tube mounting table corresponding to a notch groove on the inner side of the tube opening nut is further provided with a positioning hole which is matched with the jackscrew and used for limiting the hard pressing piece rotating for a certain angle to slide out of a plane pressing groove on the rear side of the positioning circular ring.
7. The dental X-ray machine of claim 5, wherein the back side of the positioning ring of the nozzle nut is further provided with at least one positioning groove for facilitating positioning connection with the beam tube mounting table, and a positioning block matched with each positioning groove is arranged on the corresponding beam tube mounting table surface.
8. The dental X-ray machine of claim 5, wherein the hard pressing and fixing piece is a rigid metal piece, and three pushing holes which are uniformly distributed in the circumferential direction and are convenient for clamping the clamp and fixing piece to rotate are further formed in the hard pressing and fixing piece.
9. The dental X-ray machine of claim 1, wherein at least two lugs uniformly distributed on the periphery of the periphery are extended from the outer edge of the nozzle nut, a through hole is formed in each lug, a convex rib post which is matched with each lug and provided with a threaded hole is extended from the outer edge of the corresponding beam tube mounting table, and the nozzle nut is fastened on the threaded hole of each convex rib of the outer edge of the beam tube mounting table through a screw passing through the through hole lock on each lug.
10. A method of packaging a dental X-ray machine according to any one of claims 1 to 9, comprising the steps of:
firstly, when the dental X-ray machine is assembled, a positioning groove at the rear side of a barrel opening nut corresponds to a positioning block on a beam barrel installation table, then a screw penetrates through a through hole on each lug on the barrel opening nut to be matched with a corresponding threaded hole on a convex prism at the outer edge of the beam barrel installation table, and the barrel opening nut is fixed on the beam barrel installation table;
step two, sequentially assembling the top sealing cover sealing assembly, the insulating cover and the voltage doubling PCB assembly in the X-ray tube shell, and sealing and fixing the top sealing cover sealing assembly, the insulating cover and the voltage doubling PCB assembly by an aluminum plate shell;
thirdly, horizontally placing the assembled whole dental X-ray machine in a vacuum sealing box, wherein a barrel opening nut is positioned at the highest position of a horizontal plane and is opposite to an oil filling port in the vacuum sealing box, and closing a cover body on the vacuum sealing box;
step four, a power supply of a vacuum pump is turned on, an extraction valve arranged on an air pipe between the vacuum sealing box and the vacuum pump is turned on, and after air is exhausted, the extraction valve is turned off after the barometer on the vacuum sealing box shows that the vacuum degree reaches minus 0.06 MPA;
step five, then, opening an oil inlet valve arranged on a communicating pipeline with the oil filling port, and slowly injecting transformer insulating oil into a closed cavity of the X-ray tube shell from the oil filling port through the threaded connecting hole and the ray guiding hole in a negative pressure vacuum state, and closing the oil inlet valve when the oil level is over a cylinder port nut;
step six, opening a release valve arranged on the air pipe, opening a cover body on the vacuum sealing box when the barometer on the vacuum sealing box shows that the vacuum degree is close to zero, sleeving an O-shaped ring at the rear side of the circular skirt of the U-shaped transparent sealing cup when the liquid level of the transformer insulating oil after the vacuum is released is not lower than the lowest position of the threaded connection hole, inserting the inverted U-shaped transparent sealing cup into the ray guiding hole through the threaded connection hole of the nozzle nut to further raise and overflow the liquid level of the transformer insulating oil in the threaded connection hole and extrude bubbles around the threaded connection hole, and observing whether gas exists in the X-ray tube shell after the transformer insulating oil is injected by using the U-shaped transparent sealing cup, wherein the fact that no gas exists indicates that the X-ray tube shell is successfully injected with oil;
step seven, a pushing hole on a clamping hard pressing and fixing piece is utilized, after each pressing convex edge on the hard pressing and fixing piece passes through a notch groove on a positioning circular ring on the inner side of a threaded connection hole, the clamping jaw drives the hard pressing and fixing piece to rotate by a certain angle and is embedded and buckled in a plane pressing and buckling groove on the rear side of the positioning circular ring, and meanwhile the lower side surface of the hard pressing and fixing piece is abutted against the circular skirt edge of the U-shaped transparent sealing cup, so that the U-shaped transparent sealing cup is rigidly pressed and buckled and fixed at a ray guiding hole;
step eight, installing jackscrews from a notch groove at the inner side of a barrel opening nut at the position corresponding to a positioning hole on the beam barrel mounting table, screwing the jackscrews into the positioning hole to limit the hard pressing and fixing piece rotating by a certain angle to slide out from a plane pressing and fixing groove at the rear side of the positioning circular ring;
and step nine, finally, sequentially sleeving an annular lead sheet and an optical filter in a threaded connection hole of a barrel opening nut, and screwing the beam light barrel to complete the whole packaging connection.
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