CN205047614U - Blast furnace pinhole bolted connection subassembly - Google Patents
Blast furnace pinhole bolted connection subassembly Download PDFInfo
- Publication number
- CN205047614U CN205047614U CN201520668740.2U CN201520668740U CN205047614U CN 205047614 U CN205047614 U CN 205047614U CN 201520668740 U CN201520668740 U CN 201520668740U CN 205047614 U CN205047614 U CN 205047614U
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- CN
- China
- Prior art keywords
- pin hole
- pin
- hole bolt
- cotter pilotage
- blast furnace
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Abstract
The utility model belongs to blast furnace field in the iron -smelting especially relates to a blast furnace pinhole bolted connection subassembly, including the pinhole bolt, plain washer, nut and cotter pilotage form bears the static load, can dismantle connection structure, sets up an oval pinhole on the pinhole shank of bolt, and the width of oval pinhole equals with the width of trapezoidal cotter pilotage that the the arc RADIUS of oval pinhole equals with the hypotenuse chamfer radius of trapezoidal cotter pilotage. The utility model discloses in, the axis of pinhole bolt, must with two flange expert hole center line of blast furnace air supply straight tube and belly pipe should rigorously enforce concentric, the utility model provides a when the structure has been overcome installation air supply straight tube just and has been twisted the screw special charges with the belly pipe in -process, hard problem. Pinhole bolted connection subassembly is dismantled simply, convenient, swift, and it only need be unscrewed the nut, then extracts the cotter pilotage and accomplish promptly and demolish. The utility model discloses owing to saved when dismantling preceding beam worker and the rest and reorganization man -hour after dismantling, can improve 3~5 times work efficiency.
Description
Technical field
The utility model belongs to blast furnace field in ironmaking, particularly relates to a kind of blast furnace Pin hole bolt connection part.
Background technique
At present, known plain bolt forms by head with externally threaded cylindrical body screw rod two-part, needs and nut screw connection, for being fastenedly connected blast furnace air-supply straight tube and belly pipe two parts with flange through hole.Because site space position is narrow, during fastening nut, spanner is put to good use not open, firmly uneven, often occurs that hot blast sprays from the gap between air-supply straight tube and belly pipe two adpting flanges, even burns air-supply straight tube and belly pipe, cause blast furnace stopping.
In addition, the working principle of plain bolt adopts the frictional force between nuts and bolt to carry out self-locking, but air-supply straight tube and belly pipe are in hot environment, and hot-blast pressure is also fluctuation, this just may cause the thread of plain bolt to deform, and causes the change of pretightening force to cause bolt looseness.Therefore, in air-supply straight tube and belly pipe installation process, two nuts equally must be taked to be screwed on same support bolt, the locking measure of an additional screw-down torque between two nuts, the reliability of guarantee nut check.
In addition, after plain bolt tightens, mechanical structure changes, and moment of torsion also likely increases, and indivedual bolt high temperature deformation, corrosion even cannot be dismantled.Needing to weld leading screw to remove it, putting hydraulic jack, cutting off with gas welding, by methods such as sledgehammer knock, but this destructiveness dismounting technique is still taken a lot of work, is taken material and poor stability, very easily causes personal safety accident.
In addition, change in air-supply straight tube and belly pipe process in interim repairing, because plain bolt installation and removal are particularly troublesome, the time is oversize, causes furnace outage time long, has a strong impact on blast furnace and normally produces.
Model utility content
Technical problem to be solved in the utility model is to provide a kind of blast furnace Pin hole bolt connection part, oversize to solve the installation and removal time in prior art, causes furnace outage time long, has a strong impact on the normal production problem of blast furnace.
The utility model realizes like this, a kind of blast furnace Pin hole bolt connection part, comprise Pin hole bolt, plain washer, nut, and cross section be quadrilateral cotter pilotage formed bear static load, Detachable connection structure, a wherein long limit of described cotter pilotage is vertical with the bar of Pin hole bolt, be a hypotenuse corresponding to this long limit, the upper end of described Pin hole bolt arranges an oval pin-and-hole, the width of oval pin-and-hole is equal with the width of cotter pilotage, the radius of arc of oval pin-and-hole is equal with the hypotenuse chamfer radius of cotter pilotage, Pin hole bolt puts plain washer, to screw on nut, through fastener through hole center line, then to aim at oval pin-and-hole firmly urgent for trapezoidal cotter pilotage.
Further, the length of oval pin-and-hole is greater than the minimum constructive height of cotter pilotage.
Further, cotter pilotage is have parallel trapezoidal in both sides, and the long limit of cotter pilotage is vertical with two parallel edges.
Further, the lower end of Pin hole bolt arranges the screw thread identical with plain washer internal diameter size, be enclosed within Pin hole bolt at described plain washer, effect is the area of contact strengthening Pin hole bolt and fastener, eliminates the infringement to fastener surface when dismantling Pin hole bolt.
Further, the lower end of Pin hole bolt arranges the screw thread with nut internal diameter equivalent specifications, at the screw thread of described nut by inner side, together with being screwed in Pin hole bolt, is used for playing the role of fastening.
Further, the upper end of Pin hole bolt arranges the oval pin-and-hole equal with trapezoidal cotter pilotage width, and Pin hole bolt puts plain washer, nut of screwing on, and through fastener through hole center line, then to aim at oval pin-and-hole firmly urgent for trapezoidal cotter pilotage.
Compared with prior art, beneficial effect is the utility model:
1, first Pin hole bolt is put plain washer before installing, nut is screwed to the position that distance pin hole lower end and fastener thickness is less than 10mm, then pass fastener through hole center line with plain washer from bottom to up together with the Pin hole bolt of nut, finally cotter pilotage is aimed at oval pin-and-hole firmly urgent.Two axis centre that in the utility model, Pin hole bolt is connected with fastener through hole should be strict concentric, when squeezing into cotter pilotage must accurately with oval pin-and-hole nature centering, urgent, otherwise gap will be produced between air-supply straight tube and belly pipe two adpting flanges, Pin hole bolt causes very large stress, the hot blast of 1230 DEG C in blast furnace, with the blast of 400Kpa, spray from the gap between air-supply straight tube and belly pipe two adpting flanges with the wind speed of 260m/s, even burn air-supply straight tube and belly pipe, cause blast furnace stopping.The direction of oval pin-and-hole can need with the axis of Pin hole bolt for the arbitrarily angled adjustment of axle according to scene, and blowing, straight tube and belly pipe two fastening parts connect into an entirety, and compact structure, intensity are high, good seal performance, convenient disassembly.Pin hole bolt in fastener through hole can 360 ° rotate arbitrarily, only find the openst direction, space of oval pin-and-hole opening accurately, could in time, exactly cotter pilotage to be aimed at oval pin-and-hole firmly urgent.When structure in the utility model overcomes just and installs thread special charges in air-supply straight tube and belly pipe process, hard problem.
2, the dismounting of Pin hole bolt connection part is simple, convenient, fast, and it only needs nut to unscrew, and then extracts cotter pilotage and namely completes dismounting.In rest and reorganization man-hour when the utility model is owing to eliminating the beam worker before dismounting and after dismounting, work efficiency 3 ~ 5 times can be improved.
3, due to the axis of Pin hole bolt, must and blast furnace air-supply straight tube and belly pipe two adpting flange through hole center lines should be strict concentric, Pin hole bolt is in use almost without unbalance loading, additional drag when so not only can eliminate dismounting, also contributes to the integrity ensureing to be disassembled Pin hole bolt.Pin hole bolt connection part in the utility model can Reusability, without the need to consuming auxiliary material, greatly can reduce spare parts cost.
4, Pin hole bolt connection part is in unloading process, not by surrounding space limited influence, does not need larger dynamic load, so do not need welding and gas cutting, adds Security.
5, Pin hole bolt connection part in use, and if there is loosening, only needing to exert oneself urgent trapezoidal cotter pilotage can be fastening, without any need for loosening device.
Accompanying drawing explanation
Fig. 1 is the device structure decomposing schematic representation that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of blast furnace Pin hole bolt connection part, comprise Pin hole bolt 1, plain washer 2, nut 3 and cross section be quadrilateral cotter pilotage 4 formed bear static load, Detachable connection structure, the bar of Pin hole bolt 1 is arranged an oval pin-and-hole, the width of oval pin-and-hole is equal with the width of cotter pilotage, and the radius of arc of oval pin-and-hole is equal with the hypotenuse chamfer radius of cotter pilotage.A wherein long limit of cotter pilotage is vertical with the bar of Pin hole bolt, be a hypotenuse corresponding to this long limit, the radius of arc of oval pin-and-hole is equal with the hypotenuse chamfer radius of cotter pilotage, Pin hole bolt puts plain washer, to screw on nut, through fastener through hole center line, then to aim at oval pin-and-hole firmly urgent for trapezoidal cotter pilotage.The length of oval pin-and-hole is greater than the minimum constructive height of cotter pilotage, the beeline namely between hypotenuse to long limit.In one embodiment, cotter pilotage is have parallel trapezoidal in both sides, and the long limit of cotter pilotage is vertical with two parallel edges.
In the present embodiment, Pin hole bolt 1, the size of plain washer 2, nut 3 and cotter pilotage 4 is respectively: M48 × 280mm, Φ 48mm, M48,45 × 65 × 150mm.The lower end of Pin hole bolt 1 arranges the screw thread identical with plain washer 2 internal diameter size, is enclosed within Pin hole bolt at described plain washer 2, and effect is the area of contact strengthening Pin hole bolt and fastener, eliminates the infringement to fastener surface when dismantling Pin hole bolt.Meanwhile, the lower end of Pin hole bolt 1 arranges the screw thread with nut 3 internal diameter equivalent specifications, at the screw thread of described nut 3 by inner side, together with being screwed in, is used for playing the role of fastening with Pin hole bolt 1.Meanwhile, pin-and-hole spiral shell, the upper end of 1 arranges the oval pin-and-hole equal with cotter pilotage 4 width, and Pin hole bolt 1 puts plain washer 2, nut 3 of screwing on, and through fastener through hole center line, then to aim at oval pin-and-hole firmly urgent for cotter pilotage 4.
In use, if there is loosening, only needing to exert oneself urgent cotter pilotage 4 can be fastening, without any need for loosening device for Pin hole bolt connection part.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. a blast furnace Pin hole bolt connection part, it is characterized in that, comprise Pin hole bolt, plain washer, nut, and cross section be quadrilateral cotter pilotage formed bear static load, Detachable connection structure, a wherein long limit of described cotter pilotage is vertical with the bar of Pin hole bolt, be a hypotenuse corresponding to this long limit, the upper end of described Pin hole bolt arranges an oval pin-and-hole, the width of oval pin-and-hole is equal with the width of cotter pilotage, the radius of arc of oval pin-and-hole is equal with the hypotenuse chamfer radius of cotter pilotage, Pin hole bolt puts plain washer, to screw on nut, through fastener through hole center line, then to aim at oval pin-and-hole firmly urgent for trapezoidal cotter pilotage.
2. according to blast furnace Pin hole bolt connection part according to claim 1, it is characterized in that, the length of oval pin-and-hole is greater than the minimum constructive height of cotter pilotage.
3. according to blast furnace Pin hole bolt connection part according to claim 1, it is characterized in that, cotter pilotage is have parallel trapezoidal in both sides, and the long limit of cotter pilotage is vertical with two parallel edges.
4. according to blast furnace Pin hole bolt connection part according to claim 1, it is characterized in that, the lower end of Pin hole bolt arranges the screw thread identical with plain washer internal diameter size, be enclosed within Pin hole bolt at described plain washer, effect is the area of contact strengthening Pin hole bolt and fastener, eliminates the infringement to fastener surface when dismantling Pin hole bolt.
5. according to blast furnace Pin hole bolt connection part according to claim 1, it is characterized in that, the lower end of Pin hole bolt arranges the screw thread with nut internal diameter equivalent specifications, at the screw thread of described nut by inner side, together with being screwed in Pin hole bolt, is used for playing the role of fastening.
6. according to blast furnace Pin hole bolt connection part according to claim 1, it is characterized in that, the upper end of Pin hole bolt arranges the oval pin-and-hole equal with trapezoidal cotter pilotage width, Pin hole bolt puts plain washer, to screw on nut, through fastener through hole center line, then to aim at oval pin-and-hole firmly urgent for trapezoidal cotter pilotage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520668740.2U CN205047614U (en) | 2015-08-31 | 2015-08-31 | Blast furnace pinhole bolted connection subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520668740.2U CN205047614U (en) | 2015-08-31 | 2015-08-31 | Blast furnace pinhole bolted connection subassembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205047614U true CN205047614U (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520668740.2U Expired - Fee Related CN205047614U (en) | 2015-08-31 | 2015-08-31 | Blast furnace pinhole bolted connection subassembly |
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| CN (1) | CN205047614U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201988A (en) * | 2015-08-31 | 2015-12-30 | 本钢板材股份有限公司 | Pin hole bolt connection assembly for blast furnace and use method |
-
2015
- 2015-08-31 CN CN201520668740.2U patent/CN205047614U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201988A (en) * | 2015-08-31 | 2015-12-30 | 本钢板材股份有限公司 | Pin hole bolt connection assembly for blast furnace and use method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20200831 |