CN111676339A - Structure for preventing gas leakage from air port - Google Patents
Structure for preventing gas leakage from air port Download PDFInfo
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- CN111676339A CN111676339A CN202010674412.9A CN202010674412A CN111676339A CN 111676339 A CN111676339 A CN 111676339A CN 202010674412 A CN202010674412 A CN 202010674412A CN 111676339 A CN111676339 A CN 111676339A
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- Prior art keywords
- tuyere
- sleeve
- plate
- preventing
- pin
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- 238000003825 pressing Methods 0.000 claims abstract description 32
- 239000003034 coal gas Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002585 base Substances 0.000 description 23
- 239000011449 brick Substances 0.000 description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
The invention relates to a structure for preventing a tuyere from leaking coal gas, which comprises a tuyere small sleeve, a tuyere middle sleeve and a tuyere large sleeve, wherein the inner cavity of the tuyere small sleeve forms an air supply channel of the tuyere, and the large-diameter end of the tuyere small sleeve is hermetically sleeved on the inner side of the small-diameter end of the tuyere middle sleeve; the large-diameter end of the tuyere medium sleeve is hermetically arranged at the inner side of the small-diameter end of the tuyere large sleeve; at least 3 pin rods are arranged on the end face of the large-diameter end of the tuyere large sleeve in an extending manner in the direction far away from the tuyere medium sleeve, and each pin rod is arranged along the axial direction of the tuyere large sleeve; and pressing plates capable of being fixed in the axial direction and the circumferential direction are respectively sleeved on the pin rods, and one end, far away from the pin rods, of each pressing plate can be clamped and abutted against the end face of one end with the large diameter of the tuyere medium sleeve. The structure adopts the pressing plate to connect the tuyere large sleeve and the tuyere medium sleeve together, thereby effectively preventing the problem that gas leaks from a gap between the tuyere large sleeve and the tuyere medium sleeve, effectively avoiding the problem that the tuyere medium sleeve and the tuyere small sleeve are difficult to replace and realizing the safe and low-consumption production of the blast furnace.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy, in particular to a structure for preventing coal gas leakage from a tuyere.
Background
In the blast furnace smelting process, complex physical and chemical reactions can be carried out in the furnace, a plurality of harmful elements such as alkali metal, zinc and the like can be brought into furnace materials, the harmful elements are reduced at high temperature, one part of the harmful elements are discharged out of the furnace along with blast furnace gas and furnace slag, the other part of the harmful elements are circularly enriched in the furnace, a large amount of alkali metal and zinc can be found particularly in a tuyere area when a tuyere is replaced, and in addition, the alkali metal and the zinc can permeate into refractory materials to cause abnormal expansion of the refractory materials. The erosion mechanism is as follows: the alkali metal (K, Na) is liable to form a low-melting substance in the blast furnace, and chemically reacts with the refractory, causing a decrease in strength and abnormal expansion of the refractory. Reaction of alkali vapor in the furnace: 2R + CO ═ R2O + C (reaction temperature: 850 ℃ -900 ℃), R produced2The O and the graphite carbon simultaneously permeate into brick seams or brick lining air holes to be deposited, and the brick lining is abnormally expanded. Compared with potassium and sodium, zinc vapor has larger particle mass and smaller ionic radius, has larger momentum and penetrating power at high temperature and is easier to enter the interior of the brick lining. The zinc vapor that permeates the brick lining condenses in the brick lining and oxidizes to Zn0, resulting in an abnormal expansion of the brick lining volume. The abnormal expansion of the brick lining can cause the upwarp deformation of the tuyere middle sleeve above the brick lining, the tuyere middle sleeve and the tuyere large sleeve generally adopt a hard sealing mode of conical surface combination, once the tuyere middle sleeve upwarps, the contact length of the lower joint surface can be reduced until a gap is generated, and therefore the phenomenon of coal gas leakage occurs.
Although relevant specifications of blast furnace iron making require the content of harmful elements in raw materials entering the furnace, most of domestic blast furnaces still do not meet the specifications for various reasons, and some blast furnaces mainly taking 'economic materials' even seriously exceed the standards. Therefore, the phenomenon that gas leaks from the tuyere of the domestic blast furnace after the blast furnace is put into operation generally occurs, the working environment in front of the blast furnace is worsened, and potential safety hazards are brought to the production field. In addition, the upturned deformation of the tuyere middle sleeve can also cause the difficulty in replacing the tuyere middle sleeve and the tuyere small sleeve, prolong the damping-down maintenance time of the blast furnace and influence the yield and the economic benefit of the blast furnace.
Therefore, the inventor provides a structure for preventing the gas leakage of the tuyere by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
The invention aims to provide a structure for preventing a tuyere from leaking coal gas, which solves the problems of easy leakage, difficult maintenance and replacement and the like of a tuyere middle sleeve due to deformation in the prior art.
The structure for preventing the coal gas leakage of the tuyere comprises a small tuyere sleeve, a middle tuyere sleeve and a large tuyere sleeve which are sleeved inside and outside in a stacked mode and are arranged in a taper sleeve structure, wherein an inner cavity of the small tuyere sleeve forms an air supply channel of the tuyere, and one end with the large diameter of the small tuyere sleeve is sleeved on the inner side of one end with the small diameter of the middle tuyere sleeve in a sealing mode; the large-diameter end of the tuyere medium sleeve is hermetically arranged at the inner side of the small-diameter end of the tuyere large sleeve; at least 3 pin rods are arranged on the end face of the large-diameter end of the tuyere large sleeve in an extending manner in the direction far away from the tuyere medium sleeve, and each pin rod is arranged along the axial direction of the tuyere large sleeve; and pressing plates capable of being fixed in the axial direction and the circumferential direction are respectively sleeved on the pin rods, and one end, far away from the pin rods, of each pressing plate can be clamped and abutted against the end face of one end with the large diameter of the tuyere medium sleeve.
In a preferred embodiment of the present invention, at least 3 fixing bases are circumferentially spaced on an end surface of the large-diameter end of the tuyere medium sleeve, each fixing base is respectively disposed corresponding to each pin rod, and one end of each pressing plate far away from the pin rod can be clamped and abutted against each fixing base.
In a preferred embodiment of the present invention, each of the pressure plates is disposed in an L shape, and includes an axial plate disposed along an axial direction of the tuyere large sleeve, a radial plate disposed along a radial direction of the tuyere large sleeve is disposed at a first end of the axial plate, a through hole is disposed on the radial plate, the radial plate is sleeved on the pin rod through the through hole, a second end of the axial plate abuts against the fixed base, a wedge plate is disposed between one end of the pin rod away from the tuyere medium sleeve and the radial plate, and the wedge plate is used for axially compressing and fixing the pressure plate.
In a preferred embodiment of the present invention, a wedge plate mounting groove is disposed on one end of each pin rod away from the tuyere medium sleeve, and the wedge plate can be inserted into the wedge plate mounting groove to axially push and press the pressing plate.
In a preferred embodiment of the present invention, each of the fixing bases includes a base body, a locking groove is recessed inward from a radial outer side of the tuyere middle sleeve on the base body, a circumferential side of each locking groove is opened to form a circumferential opening, and a circumferential opening direction of at least one locking groove is opposite to a circumferential opening direction of the other locking grooves; the end surfaces of the second ends of the axial plates axially abut against the inside of the clamping grooves respectively, and one side surface of the second end of each axial plate circumferentially abuts against the circumferential side surface of each clamping groove respectively.
In a preferred embodiment of the present invention, each of the base bodies is protruded on an end surface of the large-diameter end of the tuyere medium sleeve.
In a preferred embodiment of the present invention, each of the base bodies is recessed on an end surface of the large-diameter end of the tuyere medium sleeve.
In a preferred embodiment of the present invention, the end face of the end with the large diameter of the tuyere large sleeve is provided with 3 pin rods, and the circumferential included angles between the adjacent pin rods are 125 °, 130 ° and 105 °, respectively.
In a preferred embodiment of the present invention, pin rod mounting holes are axially formed in the side wall of the tuyere large sleeve, and each pin rod is inserted and fixed in each pin rod mounting hole in a cast-in manner.
In a preferred embodiment of the invention, a closed first annular cavity is arranged on the side wall of the tuyere medium sleeve, and a first water inlet pipe and a first water discharge pipe are communicated with one end of the first annular cavity, which is far away from the tuyere small sleeve; a closed second annular cavity is arranged on the side wall of the tuyere small sleeve, and a second water inlet pipe and a second water drain pipe are communicated with one end of the second annular cavity, which is positioned in the tuyere middle sleeve; first inlet tube, first drain pipe, second inlet tube, second drain pipe and each the clamp plate is the circumference interval setting.
From the above, the structure for preventing the gas leakage from the tuyere provided by the invention has the following beneficial effects:
according to the structure for preventing the tuyere from leaking the coal gas, the tuyere large sleeve and the tuyere medium sleeve are connected together by the pressing plate, one end of the pressing plate is sleeved with the pin rod, and the other end of the pressing plate is propped against the end surface of one end with the large diameter of the tuyere medium sleeve to form a complete connecting system, so that the tuyere medium sleeve is propped tightly, and the structure can effectively prevent the problem that the gap between the tuyere large sleeve and the tuyere medium sleeve leaks the coal gas due to deformation and axial movement of the tuyere medium sleeve; the pressure plate is used as an axial propping and positioning structure, and is convenient to disassemble, so that the structure can effectively avoid the problem that the tuyere middle sleeve and the tuyere small sleeve are difficult to replace.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1: is a side view of the structure for preventing the tuyere from leaking gas of the present invention.
FIG. 2: is a cross-sectional view taken along the line A in FIG. 1.
FIG. 3: is a schematic view of the tuyere large sleeve of the invention.
FIG. 4: the schematic diagram of the tuyere large sleeve provided with the pin rod is shown.
FIG. 5: is a schematic view of the tuyere medium sleeve of the present invention.
FIG. 6: is a side view of the tuyere medium sleeve of the present invention.
FIG. 7: is a schematic view of the using state of the structure for preventing the tuyere from leaking the gas.
In the figure:
100. a structure for preventing the gas leakage of the tuyere;
1. a tuyere small sleeve; 11. a second ring cavity; 12. a second water inlet pipe; 13. a second drain pipe;
2. a tuyere medium sleeve; 21. a first ring cavity; 22. a first water inlet pipe; 23. a first drain pipe;
3. a tuyere large sleeve; 31. a pin mounting hole;
4. a pin rod; 41. a wedge plate; 42. a wedge plate mounting groove;
5. pressing a plate; 51. an axial plate; 52. a radial plate;
6. a fixed base; 61. a base body; 62. a locking groove;
91. an air supply device; 92. a furnace shell.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
The specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" 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 "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique 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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 7, the present invention provides a structure 100 for preventing a tuyere from leaking gas, which is used for providing a passage for supplying air to a blast furnace for an air supply device, and comprises a tuyere small sleeve 1, a tuyere medium sleeve 2 and a tuyere large sleeve 3 (the prior art) which are nested inside and outside and are all arranged in a taper sleeve structure, wherein an inner cavity of the tuyere small sleeve 1 forms an air supply passage of a tuyere, an outlet of the air supply device 91 is inserted into the structure 100 for preventing the tuyere from leaking gas, and an outlet of the air supply device 91 is communicated with the inner cavity of the tuyere small sleeve 1 in a sealing manner so as to supply air to the blast furnace; the large-diameter end of the tuyere small sleeve 1 is hermetically sleeved on the inner side of the small-diameter end of the tuyere medium sleeve 2; the large-diameter end of the tuyere medium sleeve 2 is hermetically arranged at the inner side of the small-diameter end of the tuyere large sleeve 3; the tuyere large sleeve 3 hermetically penetrates through a large sleeve flange fixed on a blast furnace shell 92 (the prior art);
at least 3 pin rods 4 are arranged on the end surface of the large-diameter end of the tuyere large sleeve 3 in an extending manner in the direction far away from the tuyere medium sleeve 2, and each pin rod 4 is arranged along the axial direction of the tuyere large sleeve; each pin rod 4 is sleeved with a pressing plate 5 which can be fixed in the axial direction and the circumferential direction, and one end of each pressing plate 5, which is far away from the pin rod 4, can be clamped and abutted against the end face of one end with the large diameter of the tuyere medium sleeve 2.
In the structure for preventing the coal gas leakage of the tuyere, the tuyere large sleeve and the tuyere medium sleeve are connected together by adopting the pressing plate, one end of the pressing plate is sleeved into the pin rod, and the other end of the pressing plate is propped against the end surface of one end with the large diameter of the tuyere medium sleeve to form a complete connecting system to play a role of propping up the tuyere medium sleeve; the pressure plate is used as an axial propping and positioning structure, and is convenient to disassemble, so that the structure can effectively avoid the problem that the tuyere middle sleeve and the tuyere small sleeve are difficult to replace.
Further, as shown in fig. 1, 5, and 6, at least 3 fixing bases 6 are circumferentially arranged on the end surface of the large-diameter end of the tuyere medium sleeve 2 at intervals, each fixing base 6 is respectively arranged corresponding to each pin rod 4, and one end of each pressing plate 5, which is far away from each pin rod 4, can be clamped and abutted against each fixing base 6.
Further, as shown in fig. 2, each pressing plate 5 is disposed in an L shape, and includes an axial plate 51 disposed along the axial direction of the tuyere large sleeve 3, a radial plate 52 disposed along the radial direction of the tuyere large sleeve is disposed at a first end of the axial plate 51, a through hole is disposed on the radial plate 52, the radial plate 52 is sleeved on the pin rod 4 through the through hole, a second end of the axial plate 51 abuts against the fixing base 6, a wedge plate 41 is disposed between one end of the pin rod 4 away from the tuyere medium sleeve 2 and the radial plate 52, and the wedge plate 41 is used for axially compressing the fixing pressing plate 5.
As shown in fig. 2 and 4, in the present embodiment, a wedge plate mounting groove 42 is provided at one end of each pin rod 4 away from the tuyere medium sleeve 2, and the wedge plate 41 can be inserted into the wedge plate mounting groove 42 to axially abut against the pressing plate 5. The wedge plate type fixing mode enables the fixing mode of the pressing plate 5 to be more flexible, and the wedge plate type fixing device is suitable for pressing plates or pin rods with different lengths.
Further, as shown in fig. 5 and 6, each fixing base 6 includes a base body 61, a locking groove 62 is recessed inward from the radial outer side of the tuyere middle sleeve on the base body 61, one circumferential side of each locking groove 62 is opened to form a circumferential opening, and the circumferential opening direction of at least one locking groove 62 is opposite to the circumferential opening direction of the other locking grooves; the end face of the second end of each axial plate 51 is respectively and axially abutted against each clamping groove 62, and one side face of the second end of each axial plate 51 is respectively and circumferentially abutted against the circumferential side face of each clamping groove 62, so that the circumferential fixation of the second end of the axial plate 51 is further ensured, the axial plate 51 is prevented from slipping due to the deformation of the tuyere middle sleeve 2, the axial plate 51 can be axially and circumferentially fixedly abutted against the fixed base 6, the relative fixation between the tuyere middle sleeve and the tuyere large sleeve is further ensured, and the occurrence of air leakage is avoided.
In the present embodiment, each base body 61 may be disposed on the end surface of the large diameter end of the tuyere medium sleeve 2 in a protruding manner, or may be disposed on the end surface of the large diameter end of the tuyere medium sleeve 2 in a recessed manner (the end surface of the large diameter end of the tuyere medium sleeve 2 is provided with a groove, and the base body is disposed in the groove, which is not shown in the figure).
In a specific embodiment of the present invention, 3 pin rods 4 are provided on the end surface of the end with the large diameter of the tuyere large sleeve 3, the circumferential included angles between the adjacent pin rods 4 are 125 °, 130 ° and 105 °, respectively, and accordingly, the number of the pressing plates 5 and the fixing bases 6 is also 3, and the angles set at intervals in the circumferential direction correspond to the pin rods 3. Pin 4, clamp plate 5 and unable adjustment base 6 are certain angle and arrange and can avoid taking place to interfere with the water pipe (inlet tube and drain pipe, prior art) to the equipartition is as far as possible in order to reach each point atress even, does benefit to the stability of wind gap middle cover.
Further, as shown in fig. 3, pin rod mounting holes 31 are axially formed in the side wall of the tuyere large sleeve 3, and the pin rods 4 are inserted and fixed in the pin rod mounting holes 31 in a cast-in manner.
Further, as shown in fig. 1, a closed first annular cavity 21 is arranged on the side wall of the tuyere medium sleeve 2, and a first water inlet pipe 22 and a first water discharge pipe 23 are communicated with one end of the first annular cavity 21 far away from the tuyere small sleeve 1; a closed second annular cavity 11 is arranged on the side wall of the tuyere small sleeve 1, and a second water inlet pipe 12 and a second water outlet pipe 13 are communicated with one end of the second annular cavity 11, which is positioned in the tuyere medium sleeve 2; first inlet tube 22, first drain pipe 23, second inlet tube 12, second drain pipe 13 and each clamp plate 5 are circumference interval setting, avoid taking place to interfere. The first water inlet pipe 22 and the first water outlet pipe 23 are inlet and outlet pipelines for cooling water of the tuyere medium sleeve 2, the second water inlet pipe 12 and the second water outlet pipe 13 are inlet and outlet pipelines for cooling water of the tuyere small sleeve 1, and the cooling water is mainly used for preventing cooling equipment from being burnt out.
The installation method of the structure 100 for preventing the gas leakage of the tuyere of the invention is as follows:
firstly, a tuyere large sleeve 3 is arranged on a large sleeve flange fixed on a blast furnace shell 92, and the tuyere large sleeve 3 and a tuyere medium sleeve 2 are in a horizontal state and a tuyere small sleeve 1 is in a horizontal or inclined state (determined according to requirements, in a specific embodiment of the invention, the tuyere small sleeve 1 is in a downward inclined state from outside to inside, namely the tuyere small sleeve 1 is in the innermost and lowermost position) in order to ensure smooth air supply;
then, the tuyere medium sleeve 2 and the tuyere small sleeve 1 are pushed into the tuyere large sleeve 3, so that the joint surfaces between the adjacent structures are ensured to be in close contact and in a sealing state; in the process, attention is paid to adjusting the tuyere medium sleeve 2 to enable the fixed base 6 on the tuyere medium sleeve to correspond to the pin rods 4 on the tuyere large sleeve 3 one by one;
then, the pressing plates 5 are respectively sleeved on the pin rods 4, the second ends of the axial plates 51 are abutted against the clamping grooves 62 on the fixed base 6, the circumferential position is adjusted, and circumferential abutting is guaranteed;
finally, the wedge plate 41 is wedged into the wedge plate mounting groove 42 and is axially abutted against the pressing plate 5.
From the above, the structure for preventing the gas leakage from the tuyere provided by the invention has the following beneficial effects:
according to the structure for preventing the tuyere from leaking the coal gas, the tuyere large sleeve and the tuyere medium sleeve are connected together by the pressing plate, one end of the pressing plate is sleeved with the pin rod, and the other end of the pressing plate is propped against the end surface of one end with the large diameter of the tuyere medium sleeve to form a complete connecting system, so that the tuyere medium sleeve is propped tightly, and the structure can effectively prevent the problem that the gap between the tuyere large sleeve and the tuyere medium sleeve leaks the coal gas due to deformation and axial movement of the tuyere medium sleeve; the pressure plate is used as an axial propping and positioning structure, and is convenient to disassemble, so that the structure can effectively avoid the problem that the tuyere middle sleeve and the tuyere small sleeve are difficult to replace.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (10)
1. A structure for preventing a tuyere from leaking coal gas is characterized by comprising a tuyere small sleeve, a tuyere middle sleeve and a tuyere large sleeve which are internally and externally overlapped and are arranged in a taper sleeve structure, wherein the inner cavity of the tuyere small sleeve forms an air supply channel of the tuyere, and the large-diameter end of the tuyere small sleeve is hermetically sleeved on the inner side of the small-diameter end of the tuyere middle sleeve; the large-diameter end of the tuyere medium sleeve is hermetically arranged at the inner side of the small-diameter end of the tuyere large sleeve; at least 3 pin rods are arranged on the end face of the large-diameter end of the tuyere large sleeve in an extending manner in the direction far away from the tuyere medium sleeve, and each pin rod is arranged along the axial direction of the tuyere large sleeve; and pressing plates capable of being fixed in the axial direction and the circumferential direction are respectively sleeved on the pin rods, and one end, far away from the pin rods, of each pressing plate can be clamped and abutted against the end face of one end with the large diameter of the tuyere medium sleeve.
2. The structure for preventing tuyere from leaking gas as claimed in claim 1, wherein at least 3 fixing bases are provided on the end surface of the large-diameter end of the tuyere medium sleeve at intervals in the circumferential direction, each fixing base is provided corresponding to each pin rod, and one end of each pressing plate, which is far away from the pin rod, can be engaged and abutted against each fixing base.
3. The structure for preventing coal gas leakage from a tuyere of claim 2, wherein each of the pressure plates is arranged in an L shape and comprises an axial plate arranged along the axial direction of the tuyere large sleeve, a radial plate arranged along the radial direction of the tuyere large sleeve is arranged at a first end of the axial plate, a through-rod through hole is arranged on the radial plate, the radial plate is sleeved on the pin rod through the through-rod through hole, a second end of the axial plate abuts against the fixed base, a wedge plate is arranged between one end of the pin rod, which is far away from the tuyere medium sleeve, and the radial plate, and the wedge plate is used for axially compressing and fixing the pressure plates.
4. The structure for preventing tuyere from leaking gas as claimed in claim 3, wherein a wedge plate mounting groove is provided at one end of each pin rod away from the tuyere medium sleeve, and the wedge plate can be inserted into the wedge plate mounting groove to axially abut against and press the pressing plate.
5. The structure for preventing gas leakage from a tuyere of claim 3, wherein each of the fixing bases comprises a base body, a locking groove is inwardly formed in the base body from a radial outer side of the tuyere middle sleeve, one circumferential side of each locking groove is opened to form a circumferential opening, and the circumferential opening direction of at least one locking groove is opposite to the circumferential opening direction of the other locking grooves; the end surfaces of the second ends of the axial plates axially abut against the inside of the clamping grooves respectively, and one side surface of the second end of each axial plate circumferentially abuts against the circumferential side surface of each clamping groove respectively.
6. The structure for preventing tuyere from leaking gas as claimed in claim 5, wherein each of the base bodies is protruded on an end surface of one end of the large diameter of the tuyere medium sleeve.
7. The structure for preventing tuyere from leaking gas as claimed in claim 5, wherein each of the base bodies is concavely provided on an end surface of the large-diameter end of the tuyere medium sleeve.
8. The structure for preventing tuyere from leaking gas as claimed in claim 3, wherein 3 pin rods are provided on the end surface of the end of the large diameter of the tuyere large sleeve, and the circumferential included angles between the adjacent pin rods are 125 °, 130 ° and 105 °, respectively.
9. The structure for preventing tuyere leakage of gas as claimed in claim 3, wherein pin-bar mounting holes are axially provided in the side wall of the tuyere large sleeve, and each of said pin bars is inserted and fixed in each of said pin-bar mounting holes in a cast-in manner.
10. The structure for preventing the tuyere from leaking the gas as claimed in claim 3, wherein a closed first annular cavity is arranged on the side wall of the tuyere middle sleeve, and a first water inlet pipe and a first water discharge pipe are communicated with one end of the first annular cavity, which is far away from the tuyere small sleeve; a closed second annular cavity is arranged on the side wall of the tuyere small sleeve, and a second water inlet pipe and a second water drain pipe are communicated with one end of the second annular cavity, which is positioned in the tuyere middle sleeve; first inlet tube, first drain pipe, second inlet tube, second drain pipe and each the clamp plate is the circumference interval setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010674412.9A CN111676339A (en) | 2020-07-14 | 2020-07-14 | Structure for preventing gas leakage from air port |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112553393A (en) * | 2020-12-29 | 2021-03-26 | 盐城市联鑫钢铁有限公司 | Method for preventing blast furnace tuyere sleeve from sinking |
| CN115747397A (en) * | 2022-11-17 | 2023-03-07 | 石横特钢集团有限公司 | Novel structure is administered in gas leakage prevention in wind gap |
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| CN203007289U (en) * | 2012-12-27 | 2013-06-19 | 安阳钢铁股份有限公司 | Tuyere sleeve sealing device of large blast furnace |
| CN204455156U (en) * | 2015-01-13 | 2015-07-08 | 中冶东方工程技术有限公司 | A kind of blast-furnace tuyere |
| CN205368409U (en) * | 2016-02-16 | 2016-07-06 | 河北钢铁股份有限公司承德分公司 | Overlap in wind gap that can prevent to upwarp |
| CN208791676U (en) * | 2018-10-08 | 2019-04-26 | 高金平 | A kind of blast-furnace tuyere for preventing from upwarping |
| CN212270147U (en) * | 2020-07-14 | 2021-01-01 | 中冶京诚工程技术有限公司 | Structure for preventing gas leakage from air port |
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| JP2001152219A (en) * | 1999-11-19 | 2001-06-05 | Sankyu Inc | Sealing device for tuyere part at stopping of blasting |
| CN203007289U (en) * | 2012-12-27 | 2013-06-19 | 安阳钢铁股份有限公司 | Tuyere sleeve sealing device of large blast furnace |
| CN204455156U (en) * | 2015-01-13 | 2015-07-08 | 中冶东方工程技术有限公司 | A kind of blast-furnace tuyere |
| CN205368409U (en) * | 2016-02-16 | 2016-07-06 | 河北钢铁股份有限公司承德分公司 | Overlap in wind gap that can prevent to upwarp |
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| CN212270147U (en) * | 2020-07-14 | 2021-01-01 | 中冶京诚工程技术有限公司 | Structure for preventing gas leakage from air port |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112553393A (en) * | 2020-12-29 | 2021-03-26 | 盐城市联鑫钢铁有限公司 | Method for preventing blast furnace tuyere sleeve from sinking |
| CN115747397A (en) * | 2022-11-17 | 2023-03-07 | 石横特钢集团有限公司 | Novel structure is administered in gas leakage prevention in wind gap |
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