CN221227751U - Multitube sealing structure of quartz internal plating heating tube - Google Patents
Multitube sealing structure of quartz internal plating heating tube Download PDFInfo
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- CN221227751U CN221227751U CN202322663881.2U CN202322663881U CN221227751U CN 221227751 U CN221227751 U CN 221227751U CN 202322663881 U CN202322663881 U CN 202322663881U CN 221227751 U CN221227751 U CN 221227751U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 92
- 238000007789 sealing Methods 0.000 title claims abstract description 73
- 239000010453 quartz Substances 0.000 title claims abstract description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000007747 plating Methods 0.000 title claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 80
- 239000011521 glass Substances 0.000 claims abstract description 54
- 239000012774 insulation material Substances 0.000 claims abstract description 4
- 239000000523 sample Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 2
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 2
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 6
- 238000005485 electric heating Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides a multi-tube sealing structure of a quartz inner plating heating tube, which comprises a protection tube, a glass tube, a heat insulation material arranged between the protection tube and the glass tube, at least two heating tubes arranged in the glass tube, and a liquid inlet end and a liquid outlet end which are detachably connected with the two ends of the glass tube and the heating tubes respectively through sealing components, wherein the heating tubes are quartz inner plating heating tubes, and the at least two heating tubes are equidistantly arranged in the glass tube by taking the axis of the glass tube as the center.
Description
Technical Field
The utility model relates to the field of heating pipe sealing, in particular to a multi-pipe sealing structure of a quartz inner plating heating pipe.
Background
The conventional electric heaters for heating liquid are mostly formed by placing an electric heating plate, an electric heating rod, an electric heating wire or the like in a space made of plastic or metal, carrying out storage heating or heat exchange by means of the container, wherein a heating body or a part contacted with the liquid of the electric heaters is made of metal, metal molecules or ions cannot be generated in the heating process of the liquid, the heated liquid also contains the metal molecules or the ions, the use requirement of special equipment which does not need to contain metal ions or conductive ions is not met, and the conventional electric heaters have the conditions of poor heat insulation, insulation and sealing effects, so that energy waste is easily caused, the efficiency of the electric heaters is reduced, accidents of electric leakage and heat burning people are also generated.
Although related art has been used to address such problems, certain drawbacks remain in these techniques. For example, the utility model patent CN218181708U discloses a quartz heating pipe sealing structure, which avoids the heating liquid with metal molecules or ions and has the advantages of energy saving, safety, reliability and better sealing effect, but the heating pipe still in the utility model patent CN218181708U is an electrothermal film external spray pipe, and the defects that the heat of the outer wall of the heating pipe cannot be fully absorbed by the liquid and the heat utilization rate is low still exist.
Disclosure of utility model
In order to solve the technical problems, the utility model provides a multi-tube sealing structure of a quartz inner plating heating tube, and aims to solve the technical problems that in the prior art, heat of the quartz inner plating heating tube cannot be fully utilized and the heat utilization rate is low.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
The utility model provides a quartzy interior heating tube multitube seal structure that plates, includes protection tube, glass tube, sets up the insulating material between protection tube and glass tube, sets up at least two heating pipes in the glass tube and can dismantle continuous feed liquor end and the play liquid end through seal assembly respectively with glass tube and heating pipe both ends, the heating pipe is quartzy interior heating tube that plates, at least two heating pipes use the axle center of glass tube as the center, the equidistance sets up in the inside of glass tube.
Compared with the prior art, the multi-tube sealing structure of the quartz inner plating heating tube provided by the utility model has the advantages that at least two heating tubes are equidistantly arranged in the glass tube by taking the axis of the glass tube as the center, and the heat generated by the quartz inner plating heating tube can be taken away by the liquid flowing in the glass tube, so that the heat generated by the quartz inner plating heating tube can be fully absorbed by the liquid, and the heat utilization rate is high.
Further, the liquid inlet end and the liquid outlet end are respectively provided with a plurality of liquid inlet channels and a plurality of liquid outlet channels, and the liquid inlet channels and the liquid outlet channels are respectively communicated with the inside of the glass tube.
In the utility model, the heat of the quartz inner plating heating pipe is taken away by the liquid in the liquid inlet and outlet channels by the arrangement, so that the liquid can fully absorb the heat of the inner plating heating pipe.
Further, the liquid inlet end and the liquid outlet end have the same structure, and the difference is that the liquid outlet end is provided with a temperature sensing probe mounting hole for mounting the temperature sensing probe, so that the temperature of the flowing liquid can be accurately detected.
Further, the multi-tube sealing structure of the quartz inner plating heating tube further comprises two mounting seats, wherein the two mounting seats are arranged at two ends of the glass tube, the liquid inlet end and the liquid outlet end are respectively welded and sealed with the two mounting seats, the mounting seats are provided with a first mounting groove and two second mounting grooves, two ends of the heating tube are respectively arranged in the first mounting groove, and two ends of the glass tube are respectively arranged in the second mounting groove;
Further, gaps are formed at the contact positions of the two ends of the heating pipe and the side surfaces of the first mounting groove, the gaps comprise first gaps and second gaps, and the surfaces of the second gaps are provided with first threads.
Further, the seal assembly comprises a seal and a screw rod fixing piece, the seal comprises a first seal and a second seal, the first seal comprises a first seal ring, a pressing block nut and a seal ring nut, the pressing block nut is used for pressing the first seal, the first seal is sleeved at the front end parts of the two ends of the heating pipe and is arranged in a first gap, the side face of the pressing block nut is provided with a second thread, the second thread and the seal ring nut are matched with the first thread on the surface of the second gap, the first seal ring nut is rotationally inserted into the second gap, and the pressing block nut is tightly pressed in the second gap, so that the first seal ring can be tightly pressed, and the purpose of sealing the heating pipe is achieved.
Further, the second sealing piece comprises a flat gasket sealing ring, a second sealing ring and a pressing block, the flat gasket sealing ring is sleeved at the end part of the glass tube and is arranged in the second mounting groove, the second sealing ring is sleeved at the front end part of the glass tube and is arranged at the inner side of the flat gasket sealing ring, and the pressing block can press the second sealing ring horizontally.
Further, the multi-tube sealing structure of the quartz inner plating heating tube further comprises two mounting shells which are arranged at two ends of the protection tube, and the mounting shells are provided with channels.
Further, the screw fixing piece comprises a first fixing piece, a second fixing piece, a fixing screw, a fixing nut and a stud matched with the fixing nut;
The first fixing piece and the second fixing piece are respectively provided with a plurality of through holes for the fixing screw rods and the studs to pass through, the fixing screw rods and the studs are respectively arranged in the through holes of the first fixing piece and the second fixing piece in a penetrating way, the first fixing piece is arranged on the outer side of the mounting seat, the fixing nuts comprise first fixing nuts and second fixing nuts, the studs comprise first studs and second studs, the first fixing nuts are arranged on the mounting shell, one ends of the first studs are arranged in the first nuts, and the other ends of the first studs are connected with the seat on the first fixing piece;
The second fixing piece is arranged on the inner side of the pressing block, the second stud is sequentially provided with a second fixing nut and a through hole of the second fixing piece and is connected with the first fixing piece, the second stud is further arranged adjacent to the fixing screw, and threads of the second stud are matched with threads of the fixing screw.
In the utility model, the planes at the two ends of the glass tube and the flat gasket sealing ring of the glass tube can be tightly pressed and sealed by the locking of the second fixing piece, the fixing screw and the second fixing nut.
In the utility model, the first fixing piece and the second fixing piece can be locked by the stud and the fixing nut, so that the second sealing ring is tightly sealed (the sealing can be ensured when the sealing of the horizontal gasket sealing ring of the glass tube fails).
Further, compression springs are sleeved on two sides of the fixing screw, one ends of the compression springs are adjacent to the first fixing pieces, positioning of the first fixing pieces is facilitated, a stop block is arranged at the other ends of the compression springs, and the stop block is sleeved at the end part of the fixing screw and used for blocking the compression springs.
Further, the heating pipe is provided with an electrode, and the electrode is connected with an external power line, so that the heating pipe is convenient to be electrified and heated.
Further, the liquid inlet end and the liquid outlet end are made of non-metal materials, so that heated liquid does not contain metal molecules or ions, the liquid inlet end and the liquid outlet end are made of teflon or one of high-temperature-resistant PP materials, and the heat insulation material is made of ceramic fiber heat insulation cotton and can be used for heat insulation and preventing burn of a shell of the protection tube.
Compared with the prior art, the utility model has the beneficial effects that:
(1) According to the multi-tube sealing structure of the quartz inner plating heating tube, provided by the utility model, at least two heating tubes are arranged in the glass tube at equal intervals by taking the axis of the glass tube as the center, so that heat generated by the quartz inner plating heating tube can be taken away, the heat generated by the quartz inner plating heating tube can be fully absorbed by liquid, and the heat utilization rate is high.
(2) The quartz inner plating heating tube multi-tube sealing structure integrally formed by the utility model has the advantages of more energy saving, safer and more reliable, and more accurate control of heating temperature.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an enlarged schematic view of the portion A of FIG. 1;
FIG. 3 is an enlarged schematic view of the portion B of FIG. 1;
Wherein, the technical characteristics that each reference sign indicates are as follows:
1. A protective tube; 2. a glass tube; 3. a heat insulating material; 4. heating pipes; 5. a liquid inlet end; 6. a liquid outlet end;
7. a mounting base;
81. A first seal; 82. a second seal; 811. a first seal ring; 812. pressing a block nut; 813. a seal ring nut; 821. a flat gasket seal ring; 822. a second seal ring; 823. briquetting;
91. A first fixing piece; 92. a second fixing piece; 93. a fixed screw; 96. a compression spring; 911. a seat; 941. a first fixing nut; 942. a second fixing nut; 951. a first stud; 952. a second stud;
10. a mounting shell;
11. A temperature sensing probe.
Detailed Description
The present utility model will be further described in detail with reference to the following examples, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, but the scope of the present utility model is not limited to the following specific examples.
Examples
As shown in fig. 1-3, this embodiment provides a multitube sealing structure of a quartz internal plating heating tube, which comprises a protection tube 1, a glass tube 2, a heat insulation material 3 arranged between the protection tube 1 and the glass tube 2, at least two heating tubes 4 (2 in this embodiment) arranged in the glass tube 2, and a liquid inlet end 5 and a liquid outlet end 6 which are detachably connected with two ends of the glass tube 2 and the heating tubes 4 respectively through sealing components, wherein the liquid inlet end 5 and the liquid outlet end 6 are both made of nonmetallic materials, in this embodiment are made of high temperature resistant PP materials, so that heated liquid can be prevented from having metal molecules or ions, the heating tubes 4 are quartz internal plating heating tubes, and the two heating tubes 4 are equidistantly arranged inside the glass tube 2 by taking the axis of the glass tube 2 as the center.
According to the multi-tube sealing structure of the quartz inner plating heating tube, provided by the embodiment, the two heating tubes 4 are arranged in the glass tube 2 at equal intervals by taking the axis of the glass tube 2 as the center, so that heat generated by the heating tubes 4 can be taken away, the heat generated by the heating tubes 4 can be fully absorbed by liquid, and the heat utilization rate is high.
Specifically, the liquid inlet end 5 and the liquid outlet end 6 are respectively provided with a plurality of liquid inlet channels and liquid outlet channels, and the liquid inlet channels and the liquid outlet channels are communicated with the inside of the glass tube 2, so that heat of the heating tube 4 is taken away by liquid in the liquid inlet channels and the liquid outlet channels, and the liquid can fully absorb heat of the heating tube 4.
Specifically, the liquid inlet end 5 and the liquid outlet end 6 have the same structure, and the difference is that the liquid outlet end 6 is provided with a temperature sensing probe mounting hole for mounting the temperature sensing probe 11, so that the temperature of the flowing liquid can be accurately detected.
Specifically, the multi-tube sealing structure of the quartz inner plating heating tube further comprises two mounting seats 7, the two mounting seats 7 are arranged at two ends of the glass tube 2, the liquid inlet end 5 and the liquid outlet end 6 are respectively welded and sealed with the two mounting seats 7, the mounting seats 7 are provided with a first mounting groove (not identified in the figure) and a second mounting groove (not identified in the figure), two ends of the heating tube 4 are respectively arranged in the first mounting groove, and two ends of the glass tube 2 are respectively arranged in the second mounting groove;
the two ends of the heating pipe 4 are in contact with the side surfaces of the first mounting groove to form gaps, the gaps comprise a first gap and a second gap (not marked in the figure), and the surface of the second gap is provided with first threads.
Further, the seal assembly comprises a seal member and a screw rod fixing member, the seal member comprises a first seal member 81 and a second seal member 82, the first seal member 81 comprises a first seal ring 811, a press block nut 812 and a seal ring nut 813 for pressing the first seal ring 811, the first seal ring 811 is sleeved at the front end parts of the two ends of the heating pipe 4 and is arranged in the first gap, the side surface of the press block nut 812 is provided with a second thread, the second thread and the seal ring nut 813 are matched with the first thread on the surface of the second gap, and the seal ring nut 813 is rotatably inserted into the second gap and compresses the press block nut 812.
By this arrangement, the seal ring nut 813 can press the press block nut 812 in the second space, so that the first seal ring 811 can be pressed, and the purpose of sealing the heating pipe 4 can be achieved.
Specifically, the second sealing member 82 includes a flat gasket sealing ring 821, a second sealing ring 822, and a pressing block 823, where the flat gasket sealing ring 821 is sleeved at the end of the glass tube 2 and is disposed in the second mounting groove, the second sealing ring 822 is sleeved at the front end of the glass tube 2 and is disposed at the inner side of the flat gasket sealing ring 821, and the pressing block 823 horizontally presses the second sealing ring 822.
Further, the multi-tube sealing structure of the quartz inner plating heating tube further comprises two mounting shells 10 which are arranged at two ends of the protection tube 1, the mounting shells 10 are provided with channels, and the liquid inlet end 5 and the liquid outlet end 6 are conveniently arranged outside the mounting shells 10.
Further, the screw fixing piece comprises a first fixing piece 91, a second fixing piece 92, a fixing screw 93, a fixing nut and a stud matched with the fixing nut;
The first fixing piece 91 and the second fixing piece 92 are respectively provided with a plurality of through holes for the fixing screw 93 and the studs to pass through, the fixing screw 93 and the studs are respectively arranged in the through holes of the first fixing piece 91 and the second fixing piece 92 in a penetrating way, the first fixing piece 91 is arranged on the outer side of the mounting seat 7, the fixing nuts comprise a first fixing nut 941 and a second fixing nut 942, the studs comprise a first stud 951 and a second stud 952, the first fixing nut 941 is arranged on the mounting shell 10, one end of the first stud 951 is arranged in the first fixing nut 941, and the other end of the first stud 951 is connected with a seat on the first fixing piece 91;
The second fixing piece 92 is disposed at the inner side of the pressing block 823, the second stud 952 sequentially passes through the second fixing nut 942 and the through hole of the second fixing piece 92 and is connected with the first fixing piece 91, the second stud 952 is further disposed adjacent to the fixing screw 93, and the threads of the second stud 952 are matched with the threads of the fixing screw 93.
In the present embodiment, the flat surfaces of both ends of the glass tube 2 are tightly sealed with the flat gasket 821 by the locking of the second fixing piece 92, the fixing screw 93 and the second fixing nut 942.
And in this embodiment, the stud and the fixing nut lock the first fixing piece 91 and the second fixing piece 92, so that the second sealing ring 822 tightens and seals (when the flat gasket sealing ring of the glass tube fails, the sealing of the glass tube can still be ensured).
Further, compression springs 96 are further sleeved on two sides of the fixing screw 93, one end of each compression spring 96 is adjacent to the corresponding first fixing piece 91, positioning of the corresponding first fixing piece 91 is facilitated, a stop block is arranged at the other end of each compression spring 96, and the stop block is sleeved on the end portion of the fixing screw 93 and used for blocking the corresponding compression spring.
Further, the heating pipe 4 is provided with an electrode, and the electrode is connected with an external power line, so that the heating pipe is convenient to be electrified and heated.
When the quartz inner plating heating tube multi-tube sealing structure is used, liquid flows through the heating tubes 4 (quartz inner plating heating tubes) through the liquid inlet ends 5, the heating tubes 4 start to heat, heat generated by the two heating tubes 4 is taken away through the liquid flowing in the glass tube 2, so that the heat generated by the heating tubes 4 is fully absorbed by the liquid, and then the liquid comes out from the liquid outlet ends 7.
Variations and modifications to the above would be obvious to persons skilled in the art to which the utility model pertains from the foregoing description and teachings. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the utility model should be also included in the scope of the claims of the utility model. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not constitute any limitation on the utility model.
Claims (10)
1. The utility model provides a plate heating tube multitube seal structure in quartz, includes protection tube (1), glass tube (2), sets up insulating material (3) between protection tube (1) and glass tube (2), sets up two at least heating pipes (4) in glass tube (2), and can dismantle continuous feed liquor end (5) and play liquid end (6) through seal assembly respectively with glass tube (2) and heating pipe (4) both ends, heating pipe (4) are Dan Yingna plate heating pipe, its characterized in that, two at least heating pipes (4) use the axle center of glass tube (2) as the center, the equidistance sets up in the inside of glass tube (2).
2. The multi-tube sealing structure of the quartz inner plating heating tube according to claim 1, wherein the liquid inlet end (5) and the liquid outlet end (6) are respectively provided with a plurality of liquid inlet channels and liquid outlet channels, and the liquid inlet channels and the liquid outlet channels are communicated with the inside of the glass tube (2).
3. The multi-tube sealing structure of the quartz inner plating heating tube according to claim 2, wherein the liquid inlet end (5) and the liquid outlet end (6) have the same structure, and the difference is that the liquid outlet end (6) is provided with a temperature sensing probe mounting hole.
4. The multi-tube sealing structure of the quartz inner plating heating tube according to claim 1, further comprising two mounting seats (7), wherein the two mounting seats (7) are arranged at two ends of the glass tube (2), the liquid inlet end (5) and the liquid outlet end (6) are respectively welded and sealed with the two mounting seats (7), the mounting seats (7) are provided with a first mounting groove and a second mounting groove, two ends of the heating tube (4) are respectively arranged in the first mounting groove, and two ends of the glass tube (2) are respectively arranged in the second mounting groove;
The two ends of the heating pipe (4) are in contact with the side surfaces of the first mounting groove to form gaps, the gaps comprise first gaps and second gaps, and the surfaces of the second gaps are provided with first threads.
5. The quartz inner plating heating tube multitube sealing structure according to claim 4, wherein the sealing assembly comprises a sealing member and a screw rod fixing member, the sealing member comprises a first sealing member (81) and a second sealing member (82), the first sealing member (81) comprises a first sealing ring (811), a press block nut (812) and a sealing ring nut (813) which press the first sealing ring (811), the first sealing ring (811) is sleeved at the front end parts of the two ends of the heating tube (4) and is arranged in the first gap, the side surface of the press block nut (812) is provided with a second thread, the second thread and the sealing ring nut (813) are matched with the first thread of the surface of the second gap, and the sealing ring nut (813) is rotatably inserted into the second gap and presses the press block nut (812).
6. The quartz inner plating heating tube multi-tube sealing structure according to claim 5, wherein the second sealing member (82) comprises a flat gasket sealing ring (821), a second sealing ring (822) and a pressing block (823), the flat gasket sealing ring (821) is sleeved at the end part of the glass tube (2) and is arranged in the second mounting groove, the second sealing ring (822) is sleeved at the front end part of the glass tube (2) and is arranged at the inner side of the flat gasket sealing ring (821), and the pressing block (823) horizontally presses the second sealing ring (822).
7. The multi-tube sealing structure for a quartz inner plated heating tube according to claim 6, further comprising two mounting cases (10) provided at both ends of the protective tube (1), the mounting cases (10) being provided with passages.
8. The quartz inner plating heating tube multi-tube sealing structure according to claim 7, wherein the screw fixing member comprises a first fixing piece (91), a second fixing piece (92), a fixing screw (93), a fixing nut, a stud mated with the fixing nut;
The fixing device comprises a first fixing piece (91) and a second fixing piece (92), wherein a plurality of through holes for allowing a fixing screw rod (93) and a stud to pass through are formed in the first fixing piece (91) and the second fixing piece (92), the fixing screw rod (93) and the stud are respectively arranged in the through holes of the first fixing piece (91) and the second fixing piece (92) in a penetrating mode, the first fixing piece (91) is provided with the outer side of an installation seat (7), the fixing nut comprises a first fixing nut (941) and a second fixing nut (942), the stud comprises a first stud (951) and a second stud (952), the first fixing nut (941) is arranged on an installation shell (10), one end of the first stud (951) is arranged in the first nut, and the other end of the first stud (951) is connected with a seat (911) on the first fixing piece (91).
The second fixing piece (92) is arranged on the inner side of the pressing block (823), the second stud (952) sequentially penetrates through a second fixing nut (942) and a through hole of the second fixing piece (92) and is connected with the first fixing piece (91), the second stud (952) is further arranged adjacent to the fixing screw (93), and threads of the second stud (952) are matched with threads of the fixing screw (93).
9. The quartz inner plating heating tube multi-tube sealing structure according to claim 1, wherein the heating tube (4) has an electrode connected to an external power supply line.
10. The multi-tube sealing structure of the quartz inner plating heating tube according to claim 1, wherein the liquid inlet end (5) and the liquid outlet end (6) are made of nonmetallic materials, the liquid inlet end (5) and the liquid outlet end (6) are made of one of teflon or high-temperature-resistant PP material, and the heat insulation material (3) is made of ceramic fiber heat insulation cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322663881.2U CN221227751U (en) | 2023-09-28 | 2023-09-28 | Multitube sealing structure of quartz internal plating heating tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322663881.2U CN221227751U (en) | 2023-09-28 | 2023-09-28 | Multitube sealing structure of quartz internal plating heating tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221227751U true CN221227751U (en) | 2024-06-25 |
Family
ID=91567596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322663881.2U Active CN221227751U (en) | 2023-09-28 | 2023-09-28 | Multitube sealing structure of quartz internal plating heating tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221227751U (en) |
-
2023
- 2023-09-28 CN CN202322663881.2U patent/CN221227751U/en active Active
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