CN114264424A - Sealing performance testing tool and method for preform sintering furnace - Google Patents
Sealing performance testing tool and method for preform sintering furnace Download PDFInfo
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- CN114264424A CN114264424A CN202111349864.0A CN202111349864A CN114264424A CN 114264424 A CN114264424 A CN 114264424A CN 202111349864 A CN202111349864 A CN 202111349864A CN 114264424 A CN114264424 A CN 114264424A
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- sintering furnace
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- heat insulation
- cover plate
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- 238000007789 sealing Methods 0.000 title claims abstract description 92
- 238000005245 sintering Methods 0.000 title claims abstract description 67
- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims description 18
- 238000009413 insulation Methods 0.000 claims abstract description 56
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 239000000523 sample Substances 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 24
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 238000010998 test method Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 description 7
- 239000001307 helium Substances 0.000 description 5
- 229910052734 helium Inorganic materials 0.000 description 5
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 5
- -1 polytetrafluoroethylene Polymers 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention relates to a sealing test tool for a preform sintering furnace, which is used for connecting and sealing a central tube of the sintering furnace to be tested, wherein the central tube of the sintering furnace to be tested comprises a first tube section and a second tube section which are arranged from top to bottom, and the bottom of the second tube section is provided with an air inlet, and the sealing test tool comprises: the sealing assembly is arranged on the detection tube; an insulation assembly disposed at a top end of the second pipe segment to seal a top port of the second pipe segment; one end of the detection tube penetrates through the sealing assembly and the heat insulation assembly in sequence to the center tube of the sintering furnace. According to the sealing performance testing tool for the sintering furnace of the preform rod, disclosed by the invention, the heat insulation assembly is arranged at the top end opening of the second pipe section, so that the influence of high temperature on workers during operation can be avoided, the whole sealing environment is ensured through the sealing assembly and the heat insulation assembly, and when the oxygen content in the detection pipe is higher, the leakage problem of the central pipe of the sintering furnace is indicated, so that the sealing performance of the central pipe of the sintering furnace is tested under the condition of not cooling.
Description
Technical Field
The invention relates to the technical field of tightness testing, in particular to a tool and a method for testing the tightness of a sintering furnace of a preform rod.
Background
The process gas is required to be introduced in the sintering process of the prefabricated rod, the prefabricated rod is changed into a glass rod from powder through high temperature, and meanwhile, impurities and hydroxyl in the glass rod are removed, so that the quality of the prefabricated rod is ensured.
In the sintering production, helium is generally required to be introduced for effective heat transfer, and chlorine is introduced for removing impurities and moisture, so that the sealing performance of the sintering furnace is easily reduced due to the high corrosivity of chlorine, the helium has small molecules and is easy to leak, the yield of the preform is reduced, the chlorine has toxicity, the personal safety is threatened after the leakage, and the sealing performance of the sintering furnace is required to be periodically checked.
The temperature of the sintering furnace needs to be kept above 1000 ℃, if the sintering furnace is frequently cooled due to the detection of the sealing performance, the equipment is easily damaged, and therefore the sealing performance of the sintering furnace needs to be tested at a high temperature.
The authorization notice number is: the patent of CN213357354U discloses a take optical fiber perform sintering furnace of gaseous recovery function, including the furnace body, set up in the intake pipe of furnace body lower extreme, extend to the pin in the furnace body, be equipped with the fire door that is located the upper end on the furnace body, its characterized in that: the optical fiber preform sintering furnace with the gas recovery function further comprises a gas collecting frame arranged at the upper end of the furnace opening, a recovery pipe arranged on the gas collecting frame, a first cover plate and a second cover plate, wherein the first cover plate and the second cover plate are arranged on the guide rod, the recovery pipe is communicated with the inside of the gas collecting frame, the first cover plate can cover the upper surface of the gas collecting frame, and the second cover plate can be contained in the gas collecting frame and cover the upper surface of the furnace opening.
The technical problem to be solved is as follows: helium serves as filling gas and heat conducting gas in a muffle tube of a preform sintering furnace due to the properties of high chemical stability, good heat conducting property, non-flammability and the like, and the direct discharge of the helium after the use is not beneficial to energy conservation.
The technical scheme is as follows: set up the gas collection frame through the upper end at the fire door, and set up the recovery tube on the gas collection frame to can concentrate on the gas collection frame with the waste gas that produces in the furnace body, then retrieve through the recovery tube, thereby can prevent that waste gas from directly discharging, reduce environmental pollution, and can realize that waste gas includes the cyclic utilization of helium, practice thrift the cost. However, it is still impossible to detect the sealing property thereof in a state where the temperature is kept high.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the problem that equipment is damaged due to frequent cooling when the sealing performance of the sintering furnace is tested in the prior art after cooling is needed, and provide a tool and a method for testing the sealing performance of the sintering furnace of the preform rod, which are convenient and fast to test.
In order to solve the technical problem, the invention provides a sealing performance testing tool for a preform rod sintering furnace, which is used for connecting and sealing a central tube of the sintering furnace to be tested, wherein the central tube of the sintering furnace to be tested comprises a first tube section and a second tube section which are arranged from top to bottom, the outer diameter of the first tube section is larger than that of the second tube section, and the bottom of the second tube section is provided with an air inlet, and the sealing performance testing tool comprises:
a seal assembly for sealing a top port of the first pipe section;
an insulation assembly disposed at a top end of the second pipe segment to seal a top port of the second pipe segment;
one end of the detection pipe penetrates through the sealing assembly and the heat insulation assembly in sequence to the sintering furnace central pipe;
and the oxygen analyzer is connected with the other end of the probe tube and is used for detecting the oxygen content in the central tube of the sintering furnace through the probe tube after the top ports of the first tube section and the second tube section are sealed so as to test the sealing property of the central tube of the sintering furnace.
As a further improvement of the present invention, the heat insulation assembly includes a heat insulation cover plate and a first sealing ring, the heat insulation cover plate is sleeved on the probe tube, the heat insulation cover plate is adapted to the top end port of the second tube section to seal the second tube section, and the first sealing ring is sleeved on the probe tube and attached to the upper surface of the heat insulation cover plate.
As a further improvement of the present invention, the heat insulation assembly further includes a heat insulation ring, the heat insulation ring is sleeved on the probe tube, and the heat insulation ring is attached to the lower surface of the heat insulation cover plate.
As a further improvement of the present invention, the sealing assembly includes a sealing cover plate and a second sealing ring, the sealing cover plate is sleeved on the probe tube, the sealing cover plate is adapted to the top end opening of the first tube section to seal the first tube section, and the second sealing ring is sleeved on the probe tube and attached to the upper surface of the sealing cover plate.
As a further improvement of the present invention, the sealing assembly further includes a support ring, the support ring is sleeved on the probe tube, and the support ring is connected with the second sealing ring.
As a further improvement of the present invention, the probe tube is further sleeved with a positioning ring, and the positioning ring is located above the supporting ring.
As a further development of the invention, the retaining ring is made of polytetrafluoroethylene.
As a further improvement of the invention, the first pipe section is also provided with an air outlet in the lateral direction.
In order to solve the technical problem, the invention also provides a sealing performance testing method of the preform sintering furnace, which utilizes the sealing performance testing tool of the preform sintering furnace to test and comprises the following steps:
s1: positioning an insulation assembly and a seal assembly at a top port of the second pipe segment and a top port of the first pipe segment, respectively;
s2: introducing process gas into the central tube of the sintering furnace from the gas inlet;
s3: the oxygen content in the probe tube was analyzed by an oxygen analyzer.
As a further improvement of the present invention, in S1: the heat insulation cover plate is arranged at the top port of the second pipe section, and meanwhile, the sealing cover plate is arranged at the top port of the first pipe section.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the sealing performance testing tool for the sintering furnace of the preform rod, disclosed by the invention, the heat insulation assembly is arranged at the top end opening of the second pipe section, so that the influence of high temperature on workers during operation can be avoided, the whole sealing environment is ensured through the sealing assembly and the heat insulation assembly, and when the oxygen content in the detection pipe is higher, the leakage problem of the central pipe of the sintering furnace is indicated, so that the sealing performance of the central pipe of the sintering furnace is tested under the condition of not cooling;
the sealing performance test method of the preform sintering furnace isolates the heat of the central pipe of the sintering furnace by placing and positioning the heat insulation assembly to the top port of the second pipe section, and maintains the sealing performance of the central pipe of the sintering furnace by placing and positioning the heat insulation assembly to the top port of the first pipe section.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of a sealing test tool for a sintering furnace of a preform rod according to a preferred embodiment of the present invention;
fig. 2 is a flow chart of a preform sintering furnace tightness test method in a preferred embodiment of the present invention.
The specification reference numbers indicate: 1. a first tube section; 2. a second tube section; 3. an air inlet; 4. a probe tube; 5. an oxygen analyzer; 6. a heat insulating cover plate; 7. a first seal ring; 8. a heat insulating ring; 9. sealing the cover plate; 10. a second seal ring; 11. a support ring; 12. a retaining ring.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
It will be understood that when an element is referred to as being "disposed on," "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured" to, or "fixedly coupled" to another element, it can be removably secured or non-removably secured to the other element. When an element is referred to as being "connected," "pivotally connected," to another element, it can be directly connected to the other element or intervening elements may also be present. The use of the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are for illustrative purposes only and do not denote a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terms "first," "second," "third," and the like in the description herein do not denote any particular quantity or order, but rather are used to distinguish one element from another.
In some embodiments, referring to fig. 1, the preform sintering furnace tightness testing tool according to the present invention is used for connecting and sealing a central tube of a sintering furnace to be tested, where the central tube of the sintering furnace to be tested includes a first tube section 1 and a second tube section 2 arranged from top to bottom, an outer diameter of the first tube section 1 is larger than an outer diameter of the second tube section 2, and a bottom of the second tube section 2 is provided with an air inlet 3, and includes:
a seal assembly for sealing the top port of the first pipe section 1;
the heat insulation assembly is arranged at the top end of the second pipe section 2 to seal the top end opening of the second pipe section 2;
one end of the detection tube 4 penetrates through the sealing assembly and the heat insulation assembly in sequence to the center tube of the sintering furnace;
and the oxygen analyzer 5 is connected with the other end of the probe tube 4, and the oxygen analyzer 5 is used for detecting the oxygen content in the central tube of the sintering furnace through the probe tube 4 after the top ports of the first tube section 1 and the second tube section 2 are sealed so as to test the sealing property of the central tube of the sintering furnace.
The heat insulation assembly is arranged at the top port of the second pipe section 2, the temperature of the central pipe of the sintering furnace is isolated through the heat insulation assembly, the sealing assembly is arranged at the top port of the first pipe section 1, the top port of the first pipe section 1 is sealed, the sealing performance of the central pipe of the sintering furnace at the top port during the sealing performance test is further ensured, and therefore the accuracy of the test result is improved;
it should be noted that when the oxygen content in the gas in the center tube of the sintering furnace exceeds 100ppm, it indicates that the center tube of the sintering furnace is broken and leaked.
In some embodiments, referring to fig. 1, the heat insulation assembly includes a heat insulation cover plate 6 and a first sealing ring 7, the heat insulation cover plate 6 is disposed on the probe tube 4, the heat insulation cover plate 6 is adapted to the top end opening of the second tube section 2 to seal the second tube section 2, and the first sealing ring 7 is disposed on the probe tube 4 and attached to the upper surface of the heat insulation cover plate 6. Through the cooperation of the top port of thermal-insulated apron 6 with second pipeline section 2 for the temperature is isolated by thermal-insulated apron, thereby is convenient for keep under the state of fritting furnace high temperature, tests its leakproofness, in addition, can keep the leakproofness that thermal-insulated apron 6 and detecting tube 4 cup jointed through first sealing ring 7, further improves the precision of test.
In some embodiments, referring to fig. 1, the heat insulation assembly further includes a heat insulation ring 8, the heat insulation ring 8 is sleeved on the probe tube 4, and the heat insulation ring 8 is attached to the lower surface of the heat insulation cover plate 6. High-temperature process gas in the central tube of the sintering furnace can be isolated from the probe tube 4 by arranging the heat insulation ring 8, so that the service life of the probe tube 4 is prolonged, and the probe tube is convenient to take out.
In some embodiments, referring to fig. 1, the sealing assembly includes a sealing cover plate 9 and a second sealing ring 10, the sealing cover plate 9 is disposed on the probe tube 4, the sealing cover plate 9 is adapted to the top end of the first tube section 1 to seal the first tube section 1, and the second sealing ring 10 is disposed on the probe tube 4 and attached to the upper surface of the sealing cover plate 9. Seal through sealed apron 9 the top port of first pipeline section 1, avoid process gas to reveal through the top port of first pipeline section 1, on the other hand, improve the leakproofness of sealed apron 9 and detecting tube 4 junction through second sealing ring 10, further improve the accuracy of test result.
In some embodiments, referring to fig. 1, the sealing assembly further comprises a support ring 11, the support ring 11 is sleeved on the probe tube 4, and the support ring 11 is connected with the second sealing ring 10. The second sealing ring 10 is connected with the second sealing ring 10 through the support ring 11 due to the thin wall thickness of the second sealing ring 10, and the support ring 11 is externally connected with a fixing piece, so that the second sealing ring 10 is reinforced.
In some embodiments, referring to fig. 1, the probe tube 4 is further sleeved with a positioning ring 12, and the positioning ring 12 is located above the supporting ring 11. After the detection tube 4 passes through the positioning ring 12, the detection tube 4 can be locked after being placed in place by the tightness of the positioning ring 12.
In some embodiments, referring to FIG. 1, the retaining ring 12 is made of polytetrafluoroethylene. Because of the high temperature resistance of the polytetrafluoroethylene, the polytetrafluoroethylene cannot be influenced by high temperature in the using process, and meanwhile, the positioning ring 12 can be conveniently operated by personnel.
In some embodiments, referring to fig. 1, the first pipe section 1 is further provided with an air outlet in the lateral direction. The air outlet is arranged in the lateral direction of the first pipe section 1, so that process gas can be discharged in time after leakage between the heat insulation assembly and the second pipe section 2, and the safety during testing is improved;
it should be noted that the air outlet can be connected with a recovery device to recover and independently store the process gas.
The method for testing the sealing performance of the preform sintering furnace utilizes the sealing performance testing tool of the preform sintering furnace to test, and comprises the following steps of:
s1: placing and positioning an insulation assembly and a sealing assembly at the top port of the second pipe section 2 and the top port of the first pipe section 1 respectively;
s2: introducing process gas into the central tube of the sintering furnace from the gas inlet 3;
s3: the oxygen content in the probe tube 4 is analyzed by an oxygen analyzer 5.
Placing thermal-insulated subassembly through the top port at second pipeline section 2 for the heat in the fritting furnace center tube is isolated, and the operating personnel of being convenient for operates test fixture, places seal assembly at the top port of first pipeline section 1 afterwards, forms secondary seal to the fritting furnace center tube, thereby leakproofness when further improving the test, makes the result of test more accurate.
In some embodiments, referring to fig. 1, in S1: an insulating cover 6 is placed at the top port of the second pipe section 2, while a sealing cover 9 is placed at the top port of the first pipe section 1. The top port of the second pipe section 2 is sealed through the heat insulation cover plate 6, so that the heat insulation effect on the process gas in the second pipe section 2 is achieved while the second pipe section 2 is sealed; the top port of the first pipe section 1 is sealed through the sealing cover plate 9 to form secondary sealing when the heat insulation cover plate 6 leaks, so that the sealing performance of the central pipe of the sintering furnace during testing is further improved, and the testing accuracy is improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. The utility model provides a prefabricated excellent fritting furnace leakproofness test fixture for connect and sealed fritting furnace center tube that awaits measuring, the fritting furnace center tube that awaits measuring includes first pipeline section and the second pipeline section that top-down set up, the external diameter of first pipeline section is greater than the external diameter of second pipeline section, the bottom of second pipeline section is equipped with the air inlet, its characterized in that includes:
a seal assembly for sealing a top port of the first pipe section;
an insulation assembly disposed at a top end of the second pipe segment to seal a top port of the second pipe segment;
one end of the detection pipe penetrates through the sealing assembly and the heat insulation assembly in sequence to the sintering furnace central pipe;
and the oxygen analyzer is connected with the other end of the probe tube and is used for detecting the oxygen content in the central tube of the sintering furnace through the probe tube after the top ports of the first tube section and the second tube section are sealed so as to test the sealing property of the central tube of the sintering furnace.
2. The preform sintering furnace tightness testing tool according to claim 1, wherein the heat insulation assembly comprises a heat insulation cover plate and a first sealing ring, the heat insulation cover plate is sleeved on the probe tube, the heat insulation cover plate is matched with the top port of the second tube section to seal the second tube section, and the first sealing ring is sleeved on the probe tube and attached to the upper surface of the heat insulation cover plate.
3. The preform sintering furnace tightness testing tool according to claim 2, wherein the heat insulation assembly further comprises a heat insulation ring, the heat insulation ring is sleeved on the probe tube, and the heat insulation ring is attached to the lower surface of the heat insulation cover plate.
4. The preform sintering furnace tightness testing tool according to claim 1, wherein the sealing assembly comprises a sealing cover plate and a second sealing ring, the sealing cover plate is sleeved on the probe tube, the sealing cover plate is matched with the top port of the first tube section to seal the first tube section, and the second sealing ring is sleeved on the probe tube and attached to the upper surface of the sealing cover plate.
5. The tooling of claim 4, wherein the sealing assembly further comprises a support ring, the support ring is sleeved on the probe tube, and the support ring is connected with the second sealing ring.
6. The tooling for testing the tightness of a sintering furnace for a preform rod according to claim 5, wherein a positioning ring is further sleeved on the probe tube, and the positioning ring is positioned above the supporting ring.
7. The preform sintering furnace tightness testing tool according to claim 6, wherein the positioning ring is made of PTFE.
8. The preform sintering furnace tightness testing tool according to claim 1, wherein an air outlet is further formed in the lateral direction of the first pipe section.
9. A preform sintering furnace tightness testing method, characterized in that the preform sintering furnace tightness testing tool according to any one of claims 1-8 is used for testing, and the method comprises the following steps:
s1: positioning an insulation assembly and a seal assembly at a top port of the second pipe segment and a top port of the first pipe segment, respectively;
s2: introducing process gas into the central tube of the sintering furnace from the gas inlet;
s3: the oxygen content in the probe tube was analyzed by an oxygen analyzer.
10. The preform sintering furnace tightness test method according to claim 9, wherein in S1: the heat insulation cover plate is arranged at the top port of the second pipe section, and meanwhile, the sealing cover plate is arranged at the top port of the first pipe section.
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| CN202111349864.0A CN114264424A (en) | 2021-11-15 | 2021-11-15 | Sealing performance testing tool and method for preform sintering furnace |
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| CN202111349864.0A CN114264424A (en) | 2021-11-15 | 2021-11-15 | Sealing performance testing tool and method for preform sintering furnace |
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