CN203894040U - Apparatus for detecting fastening occlusion case of large-scale bolt and large-scale nut - Google Patents
Apparatus for detecting fastening occlusion case of large-scale bolt and large-scale nut Download PDFInfo
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- CN203894040U CN203894040U CN201420243367.1U CN201420243367U CN203894040U CN 203894040 U CN203894040 U CN 203894040U CN 201420243367 U CN201420243367 U CN 201420243367U CN 203894040 U CN203894040 U CN 203894040U
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Abstract
The utility model discloses an apparatus for detecting a fastening occlusion case of a large-scale bolt and a large-scale nut. Supporting plates are welded on the two ends of a sector support. A through hole is arranged on a positive Y-direction of the sector support. Six screw holes and three positioning pin holes are arranged on the periphery of the through hole. A bolt connecting sleeve is composed of an internal screw sleeve and a flange by welding. An internal screw thread of an internal screw sleeve is matched with a screw thread of the bolt to be detected. Holes corresponding to the screw holes of the sector support and the positioning pin holes are arranged on the flange, and are connected with the sector support through a positioning pin and a connection bolt. The detection apparatus provided by the utility model can detect the large-scale bolt and the large-scale nut, verifies the occlusion case that the bolt and the nut fasten to a rated elongation value, hence risks that recondition construction period is delayed, manpower and material resources are wasted, and the bolt is false to fasten and the like are effectively prevented when the large-scale bolt and the large-scale nut are fastened on site to cause teeth chattering and dead lock. Recondition quality of a water turbine generator set or a large-scale apparatus is ensured, and the apparatus safely, stably and reliably runs.
Description
Technical field
The utility model relates to a kind of mechanical detection means, and the pick-up unit of interlock situation specifically occurs when a kind of large-sized bolt and fastening nuts.
Background technology
In the fastening bolt of hydraulic turbine connecting shaft bolt, generator connecting shaft bolt or main equipment; the bolt of large specification is used in capital; and in order to prevent that bolt from getting rusty and obtaining good mechanical property; conventionally can select the bolt of stainless steel; but in assembling process, stainless steel bolt and nut easily occur locked or kill problem.This is that including the securing member of aluminium alloy and titanium alloy material, these metal alloys itself have Corrosion Protection because of stainless steel support, can be in the time of surperficial damaged, and produce the thin oxide layer of one deck in metal surface and prevent further corrosion.In the time that stainless securing member is locked, the pressure producing between tooth line and heat can destroy this oxide layer, make metal threaded to occur to block or shear, and then the phenomenon of adhesion occurs.In the time that this phenomenon continues to occur, will make stainless steel support completely locked, again cannot pull down or continue to lock.Just once there is such problem in certain hydroelectric power plant, bought in the 3rd batch products of double end stainless steel (material the is 3Cr13) coupling bolt that specification is M90*4*456mm to former foreign producer in 2008, find that bolt all occurs that bolts and nuts are grited one's teeth and locked phenomenon when mounted, cause economic loss to a certain degree, also brought serious impact to service work.
After this, this hydroelectric power plant organizes material and the structure of relevant unit to runner coupling bolt to be optimized research, and domesticizes.Ensureing that screw bolt and nut mechanical property meets under the prerequisite of user demand as the load that ensures of the tensile strength of bolt and nut, in manufacture process, the material of bolt and nut changes structural alloy steel 35CrMo into by stainless steel, and nut hardness is fallen first-class level and prepared; In assembling process, before requiring to use, check whether screw thread is coarse, whether have iron filings or dirt between screw thread; Do lubricated with molybdenum disulfide; Note application of force direction and dynamics etc.But, in order to verify whether manufacturer production bolts and nuts out also exist and grit one's teeth and deadlock phenomenon after changing material and taking the measures such as lubricated, but also complete checking before will assembling at the scene, eliminate in time to upgrade to evade and delay the false fastening equivalent risk of maintenance duration, wasting manpower and material resources and bolt, so, the necessary pick-up unit of interlock situation while designing and producing a set of large-sized bolt and fastening nuts, addresses the above problem.
Utility model content
While being a kind of large-sized bolt and fastening nuts, there is the pick-up unit of interlock situation in the technical problems to be solved in the utility model, can detect the bolt and nut of the large specification of large model, interlock situation with checking bolts and nuts in the time being fastened to specified stretch value, detects the STRESS VARIATION of fastening bolt in rundown process.
The utility model solves the problems of the technologies described above with following technical scheme:
The pick-up unit of the utility model large-sized bolt and fastening nuts interlock situation, it is mainly made up of fan 2, two back up pads 1, bolt adapter sleeves 14, a back up pad 1 is welded respectively at the two ends, bottom of fan 2, the positive Y-direction position of fan 2 has than the through hole 9 of being examined bolt 6 slightly larger in diameter, has in the periphery of through hole 97 and 3 dowel holes 10 of uniform 6 screws of arranging; Described bolt adapter sleeve 14 is welded by inner thread sleeve 12 and flange 3, the internal thread of inner thread sleeve 12 mates with the screw thread of being examined bolt 6, on flange 3, have and 7 and 3 holes that dowel hole 10 is corresponding of 6 screws on fan 2, and be connected with fan 2 formation by 11,6 coupling bolts 8 of 3 register pins.
The pick-up unit of the utility model large-sized bolt and fastening nuts interlock situation, uniformly on described fan 2 is provided with four hydraulic spanner buttresses 4, the both sides of through hole 9 two the hydraulic spanner buttresses 4 of arranging respectively.
The utility model pick-up unit can detect the bolt and nut of the large specification of large model, the interlock situation of checking bolts and nuts in the time being fastened to specified stretch value.To purchasing the bolt of each batch of returning, the inspection that nut all passes through the utility model pick-up unit, to out and out the checking on of the large sized bolt of large model that enters on-the-spot formal assembling, qualified access, defective superseded replacing at once.Evade completely because large-sized bolt and nut assemble at the scene and having grited one's teeth when fastening and lock-up condition delays the false fastening equivalent risk of maintenance duration, wasting manpower and material resources and bolt, ensure the repair quality of hydraulic generator unit or main equipment, guaranteed device security, stable, reliability service.
Brief description of the drawings
Fig. 1 is the assembly structure schematic diagram of the utility model device.
Fig. 2 is that A-A of Fig. 1 is to cross-sectional schematic.
In figure:
1---back up pad
2---support
3---flange
4---hydraulic spanner buttress
5---examined bolt hexagon head
6---examined bolt
7---screw
8---coupling bolt
9---through hole
10---dowel hole
11---register pin
12---inner thread sleeve
13---internal thread
14---bolt adapter sleeve
15---examined nut
Embodiment
Below in conjunction with accompanying drawing, the utility model will be further described:
The utility model pick-up unit is mainly made up of fan 2, two back up pads 1, bolt adapter sleeves 14, a back up pad 1 is welded respectively at the two ends, bottom of fan 2, the positive Y-direction of fan 2 has than the through hole 9 of being examined bolt 6 slightly larger in diameter by tip position, has a circle 7 and 3 dowel holes 10 of uniform 6 M30 screws of arranging in the periphery of through hole 9; Described bolt adapter sleeve 14 is welded by inner thread sleeve 12 and flange 3, the internal thread of inner thread sleeve 12 mates with the screw thread of being examined bolt 6, on flange 3, have and 7 and 3 holes that dowel hole 10 is corresponding of 6 M30 screws on fan 2, coordinate with dowel hole 10 by three register pins 11 and 6 M30 coupling bolts 8 form a fixed connection with making flange 3 and fan 2 coordinating of 6 M30 screws 7, thereby bolt adapter sleeve 14 is fixed on support 2; On fan 2, be welded with four uniform cylindrical hydraulic spanner buttresses 4 of arranging, through hole 9 is between second hydraulic spanner buttress and the 3rd hydraulic spanner buttress.
Each part description that the utility model pick-up unit adopts is as follows:
1, support 2 is made into fan-shapedly, and object is examined the hydraulic spanner of nut 15 use and the strong point radian of lifting jack bracing frame is corresponding with tightening, to tighten and nut 15 is examined in dismounting with hydraulic tool.Equally distributed four cylindrical hydraulic spanner buttresses 4, for support jack bracing frame.
2, bolt adapter sleeve 14 can be processed its internal thread 13 according to the bolt of different size, adopts flange connection also for the bolt adapter sleeve 14 that is convenient for changing different size detects accordingly.
3, two back up pads 1 are welded with support 2, play the effect of balance and increase support force area.
Rigidity and strength needs while detection for making this device meet, back up pad 1 should be selected the suitable welded steel plate of thickness with support 2.
The parts of the utility model pick-up unit all adopt Q235A steel to be welded, and two back up pads 1 are welded with support 2.
Use the operation steps explanation of the utility model pick-up unit:
1, the butt end that double end needs being detected is examined bolt 6 is screwed in bolt adapter sleeve 14 and through through hole 9, with the urgent bolt of hand hammer;
2, be torqued into and examined nut 15 from examining bolt hexagon head 5 ends, with the preliminary pretension of hand hammer;
3, coordinate with special double offset ring spanner, hydraulic jack, lifting jack bracing frame and hydraulic pump, progressively go up jack panel.Method is: with lifting jack bracing frame be inserted in left side two hydraulic spanner buttresses 4 on, special double offset ring spanner packs into be examined on nut 15, hydraulic jack upper frame is between lifting jack bracing frame and special double offset ring spanner, and inlay card is good, primer fluid press pump backs down clockwise special double offset ring spanner by lifting jack and rotates, and can go up jack panel 15.When lifting jack stroke arrive its spacing after, can stop solution press pump and pressure release lifting jack expansion link is fallen after rise, again turn the relative distance of special double offset ring spanner and lifting jack bracing frame down, primer fluid press pump jack-up lifting jack expansion link can continue to tighten and examined nut 15 again, is examined bolt 6 stretch value single-candidate provisioning requests until meet.This urgent process of being examined nut 15 also can adopt the mode of manually swinging sledgehammer to carry out fastening.
4, the corner that step measurement is examined the stretch value of bolt 6 or examined nut 15 is to till its ratings.Taking M90*4*456mm bolt as example, its stretch value claimed range is 0.33～0.40mm, and nut corner claimed range is 55 °～60 °, and hydraulic pump on-stream pressure is 70MPa left and right.In detection, taking stretch value as main, nut corner and hydraulic pump on-stream pressure value are as a reference.
Examined in nut 15 processes fastening, if the corner of nut 15 or examined bolt 6 stretch values and do not reach ratings, but prexxure of the hydraulic pump is excessive or nut 15 can not be rotated further, can judge that gritting one's teeth appears in bolt 6 and nut 15 and locked phenomenon, last detachable nut 15 checks to be confirmed.If without this phenomenon, stressed fastening being up to the standards of this nuts and bolt is described.
Claims (2)
1. the pick-up unit of a large-sized bolt and fastening nuts interlock situation, it is characterized in that, it is mainly made up of fan (2), two back up pads (1), bolt adapter sleeve (14), a back up pad (1) is welded respectively at the two ends, bottom of fan (2), the positive Y-direction position of fan (2) has than the through hole (9) of being examined bolt (6) slightly larger in diameter, has in the periphery of through hole (9) arrange uniform 6 screws (7) and 3 dowel holes (10); Described bolt adapter sleeve (14) is welded by inner thread sleeve (12) and flange (3), the internal thread of inner thread sleeve (12) mates with the screw thread of being examined bolt (6), on flange (3), have the hole corresponding with 6 screws (7) of fan (2) and 3 dowel holes (10), and be connected with fan (2) formation by 3 register pins (11), 6 coupling bolts (8).
2. the pick-up unit of large-sized bolt and fastening nuts interlock situation according to claim 1, it is characterized in that, upper uniform four the hydraulic spanner buttresses (4) that are provided with of described fan (2), the both sides of through hole (9) two the hydraulic spanner buttresses of arranging respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420243367.1U CN203894040U (en) | 2014-05-14 | 2014-05-14 | Apparatus for detecting fastening occlusion case of large-scale bolt and large-scale nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420243367.1U CN203894040U (en) | 2014-05-14 | 2014-05-14 | Apparatus for detecting fastening occlusion case of large-scale bolt and large-scale nut |
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| Publication Number | Publication Date |
|---|---|
| CN203894040U true CN203894040U (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420243367.1U Active CN203894040U (en) | 2014-05-14 | 2014-05-14 | Apparatus for detecting fastening occlusion case of large-scale bolt and large-scale nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203894040U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994884A (en) * | 2014-05-14 | 2014-08-20 | 广西桂冠电力股份有限公司大化水力发电总厂 | Detection device for fastening meshing conditions of large bolts and nuts |
| CN114517804A (en) * | 2022-02-14 | 2022-05-20 | 陈国强 | Device capable of effectively preventing bolt from being broken due to fatigue damage |
-
2014
- 2014-05-14 CN CN201420243367.1U patent/CN203894040U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994884A (en) * | 2014-05-14 | 2014-08-20 | 广西桂冠电力股份有限公司大化水力发电总厂 | Detection device for fastening meshing conditions of large bolts and nuts |
| CN103994884B (en) * | 2014-05-14 | 2016-07-06 | 广西桂冠电力股份有限公司大化水力发电总厂 | A kind of large-sized bolt is engaged the detecting device of situation with nut fastening |
| CN114517804A (en) * | 2022-02-14 | 2022-05-20 | 陈国强 | Device capable of effectively preventing bolt from being broken due to fatigue damage |
| CN114517804B (en) * | 2022-02-14 | 2024-01-26 | 陈国强 | Device capable of effectively preventing bolt from being broken due to fatigue damage |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |