WO2017086527A1 - Écrou hydraulique - Google Patents

Écrou hydraulique Download PDF

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Publication number
WO2017086527A1
WO2017086527A1 PCT/KR2015/013124 KR2015013124W WO2017086527A1 WO 2017086527 A1 WO2017086527 A1 WO 2017086527A1 KR 2015013124 W KR2015013124 W KR 2015013124W WO 2017086527 A1 WO2017086527 A1 WO 2017086527A1
Authority
WO
WIPO (PCT)
Prior art keywords
nut
metal seal
seating jaw
hydraulic
seal
Prior art date
Application number
PCT/KR2015/013124
Other languages
English (en)
Korean (ko)
Inventor
추정민
Original Assignee
주식회사 디티앤씨뉴밀
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 디티앤씨뉴밀 filed Critical 주식회사 디티앤씨뉴밀
Publication of WO2017086527A1 publication Critical patent/WO2017086527A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/04—Screwed connections specially modified in view of tensile load; Break-bolts for maintaining a tensile load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down

Definitions

  • the present invention relates to a hydraulic nut, and more particularly, a metal seal according to a new form that can be easily processed and assembled, prevents occurrence of breakage due to accurate and excellent durability, and can prevent occurrence of pressure leakage. It relates to a hydraulic nut having a.
  • the hydraulic nut is a component that is required for a large fastening force or for the purpose of maintaining the fastening force for a long time stably.
  • Such a hydraulic nut is configured to include an inner nut, an outer nut, and a binding nut, and is coupled to a bolt installed to penetrate two fastening objects in an overlapping state, and is configured to prevent an unwanted release of the bolt.
  • a hydraulic nut it is as disclosed in Patent Nos. 10-0915866, 10-1178479, 10-1202652, 10-2010-0070726, and the like.
  • the above-described hydraulic nut according to the related art is provided as an inner metal seal and an outer metal seal for maintaining the airtightness of the cylinder chamber formed between the inner nut and the outer nut, respectively, and the grooves formed in the respective metal seals.
  • the directions of are to be arranged so as to face in opposite directions, there is a high possibility that the direction is changed due to carelessness of the operator, and the problem of frequent assembly defects is caused by the small size and the small space of the assembly position. there was.
  • the hydraulic nut according to the related art described above always has a fear that its breakage or damage may occur as the bending portion at which the bending deformation of each metal seal is made weak, thereby causing periodic safety checks or replacements. There was a problem that required maintenance.
  • the present invention has been made to solve the various problems according to the prior art described above, the object of the present invention is to facilitate the processing and assembly, to prevent the occurrence of breakage due to accurate and excellent durability, and to prevent the occurrence of pressure leakage It is to provide a hydraulic nut having a metal seal according to a new form that can be prevented.
  • Hydraulic nut of the present invention for achieving the above object forms an outer body, the inner peripheral surface of the ring-shaped outer nut is formed by the lower cylinder groove and the lower seating jaw are sequentially formed;
  • the inner nut is formed in the outer nut so that the bolt is fastened and fixed, and an inner nut is formed on the bottom of the outer nut and the upper seating jaw so as to be sequentially stepped toward the outer circumferential surface and the upper end is exposed to the outside of the outer nut;
  • a binding nut which is screwed around an upper end of the inner nut and binds the inner nut; And, the upper end is seated in the space between the inner nut and the outer nut formed by the upper seating jaw, and the lower end is seated in the space between the inner nut and the outer nut formed by the lower seating jaw, and the lower cylinder groove and the upper cylinder
  • a tubular metal seal configured to partition the cylinder chamber formed by the groove from the external environment.
  • the metal seal forms the upper periphery of the outer sealing end seated in the upper seating jaw, the lower sealing cylinder of the inner sealing end and the outer sealing end and the inner sealing end forming the lower circumference, the lower cylinder It characterized in that it comprises a connecting end formed to be bent along the inner wall surface of the groove.
  • outer sealing end and the inner sealing end of the metal seal is formed in a corrugated pipe structure having a rounded acid and valley to provide elastic restoring force while repeatedly contacting and spaced between the outer circumferential surface of the inner nut and the inner circumferential surface of the outer nut. It features.
  • the acid seal and the valley of the outer seal end and the inner seal end of the metal seal is formed in a plurality of repetitive successively, characterized in that it is configured to be in contact with at least two parts to the inner peripheral surface of the outer nut, or the outer peripheral surface of the inner nut. do.
  • edge portion formed by the lower seating jaw of the outer nut is formed to be rounded to induce a gentle bending when the metal seal is tensioned.
  • the hydraulic nut according to the present invention is capable of performing the same function as a plurality of metal seals provided to a conventional general hydraulic nut through the provision of a single metal seal, while also causing damage such as breakage.
  • This provides a good clamping force, such as a reactor head, but also prevents its loosening for a long time, thereby increasing maintenance periods, and causing a shutdown of the facility (eg, a reactor). It has an effect that can be minimized.
  • the metal seal of the hydraulic nut according to the present invention has a single inner sealing end and an outer sealing end as a single type, the assembly between the outer nut and the inner nut can be made simple and accurate, thereby preventing assembly defects. Has the effect.
  • the hydraulic nut according to the present invention can be produced by a press operation, etc., rather than the manufacturing of a single metal seal by the conventional machining, it is possible to achieve a reduction in the manufacturing cost Have too.
  • FIG. 1 is an exploded cross-sectional view illustrating a hydraulic nut according to an embodiment of the present invention.
  • Figure 2 is a cross-sectional view shown to explain the hydraulic nut according to an embodiment of the present invention
  • FIG. 3 is an enlarged view of a portion “A” of FIG. 2;
  • 4 to 9 is a state diagram for each process shown to explain the process of fastening the bolt and the hydraulic nut according to an embodiment of the present invention.
  • FIG. 10 is a state diagram shown to explain a state in which the pressure fluid is injected through the pressure oil injection hole of the hydraulic nut according to an embodiment of the present invention
  • FIG. 11 is an enlarged view of a portion “B” of FIG. 10.
  • FIG. 12 is a state diagram shown to explain a state of additionally binding a hydraulic nut with a binding nut according to an embodiment of the present invention.
  • FIG. 1 is an exploded cross-sectional view illustrating a hydraulic nut according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view illustrating a hydraulic nut according to an embodiment of the present invention.
  • the hydraulic nut according to the embodiment of the present invention is largely composed of the outer nut 100, the inner nut 200, the binding nut 300, and the metal seal 400, in particular, the metal seed.
  • the work 400 is formed in the shape of a single tube, characterized in that configured to close the cylinder chamber 500 formed between the outer nut 100 and the inner nut 200 from the external environment.
  • the outer nut 100 is a portion that forms the outer body of the hydraulic nut according to an embodiment of the present invention.
  • the outer nut 100 is formed in a ring shape in which a through hole 110 is formed to penetrate the bolt 20 therein, and a lower cylinder groove is formed on the inner circumferential surface of the through hole 110 of the outer nut 100.
  • the 120 and the lower seating jaw 130 are formed to be stepped sequentially.
  • the lower seating jaw 130 is formed to be recessed in the central portion of the inner circumferential surface of the through hole 110
  • the lower cylinder groove 120 is the lower seating jaw of the inner circumferential surface of the through hole 110 It is made by forming the upper portion of the 130 again stepped.
  • the embodiment of the present invention further proposes that the corner portion formed by the lower seating jaw 130 of the outer nut 100 is rounded. That is, by forming a rounded corner portion of the lower seating jaw 130, a gentle bend may be made while the portion located at the corner of the lower seating jaw 130 of the metal seal 400 to be described later increases. Through this, the tension of the metal seal 400 can be made to be stable and smooth.
  • the inner nut 200 is a portion that is fastened and fixed to the bolt 20 while being positioned in the outer nut 100.
  • the inner nut 200 has a lower end portion located inside the outer nut 100, and an inner circumferential surface of the inner nut 200 is formed of a threaded tube such that the bolt 20 penetrating the inner nut 100 is screwed into place. .
  • the upper cylinder groove 210 for forming the cylinder chamber 500 together with the lower cylinder groove 120 forming the outer nut 100 is formed around the bottom surface of the inner nut 200.
  • the upper seating jaw 230 is formed to be stepped on the outer circumferential surface of the upper cylinder groove 210 again.
  • a pressure oil injection hole 210 for injecting pressure oil into the cylinder chamber 500 is formed on the upper surface of the inner nut 200 to penetrate up and down.
  • the pressure oil injection hole 210 is preferably configured to provide a uniform pressure to all parts in the cylinder chamber 500 by providing a plurality of two or more in a symmetrical area.
  • the binding nut 300 is a nut for binding the inner nut 200 to be fixed to the outer nut 100.
  • the binding nut 300 is coupled to the outer peripheral surface of the upper end of the inner nut 200 to bind the inner nut 200.
  • the outer diameter of the binding nut 300 is formed to be the same as the outer diameter of the outer nut 100, and the bottom surface of the binding nut 300 is downwardly moved by the fastening with the inner nut 200 when the outer nut ( It is formed to be placed on the upper surface of 100).
  • the metal seal 400 is a portion that seals and seals the cylinder chamber 500 formed between the inner nut 200 and the outer nut 100 from an external environment.
  • the metal seal 400 has a space between the inner nut 200 and the outer nut 100 formed by the upper seating jaw 230 at the top (hereinafter, referred to as “upper clearance space”).
  • upper clearance space the space between the inner nut 200 and the outer nut 100 formed by the lower seating jaw 130 (hereinafter referred to as “lower clearance space”)
  • lower clearance space the lower end of the space between the inner nut 200 and the outer nut 100 formed by the lower seating jaw 130
  • the cylinder chamber 500 formed by the lower cylinder groove 120 and the upper cylinder groove 220 may be partitioned from the external environment.
  • the metal seal 400 forms an inner circumferential end 410 seated in the lower gap space by the lower seating jaw 130 while forming a lower circumference, and the upper circumference forming an upper circumference.
  • the metal seal 400 forms an inner circumferential end 410 seated in the lower gap space by the lower seating jaw 130 while forming a lower circumference, and the upper circumference forming an upper circumference.
  • the inner wall surface of the lower cylinder groove 120 while connecting the outer sealing end 420 and the inner sealing end 410 and the outer sealing end 420 seated in the upper gap space by the seating jaw 230. It is proposed to be made of a monolithic tubular including a connecting end 430 formed to be bent.
  • the inner sealing end 410, the outer sealing end 420 and the connecting end 430 are formed to form a single tubular shape, the corresponding metal seed in each gap space between the inner nut 200 and the outer nut 100 While the work 400 can be installed accurately, the operation for installation of the metal seal 400 is made to be made easily and easily.
  • the inner sealing end 410 and the outer sealing end 420 of the metal seal 400 repeatedly repeat the outer circumferential surface of the inner nut 200 and the inner circumferential surface of the outer nut 100. It is proposed to form a corrugated tube structure with rounded acid and valleys to provide elastic restorative force while being in contact and spaced apart. That is, due to the metal seal 400 of the corrugated pipe structure is to facilitate the tension and restoration in the axial direction.
  • the peaks and valleys of the inner sealing end 410 and the outer sealing end 420 of the metal seal 400 are at least two portions on the inner circumferential surface of the outer nut 100 or the outer circumferential surface of the inner nut 200, respectively. It is further suggested that it is configured to be contacted. That is, even if pressure leakage occurs in any one of the above-mentioned hills and valleys, the hills and valleys of the other sites may be in contact with the inner circumferential surface of the outer nut 100 or the outer circumferential surface of the inner nut 200, thereby causing pressure leakage. This is to be prevented.
  • reference numeral 600 is a tapered washer.
  • the tapered washer 600 has a surface where the surface of the hydraulic nut is fastened does not form a flat surface, or a groove is formed in the area where the hydraulic nut is fastened by using only the hydraulic nut, or the hydraulic nut is loosened. Washer to prevent.
  • the two flanges 10 to be coupled to each other are penetrated through the bolts 20 so that the upper ends of the bolts 20 are exposed to the upper surfaces of the two flanges 10.
  • the tapered washer 600 is coupled to the bolt 20 exposed to the upper surfaces of the two flanges 10. At this time, the tapered washer 600 is such that the tapered surface is located at the top.
  • the outer nut 100 is further coupled to the bolt 20 as shown in FIG. 6. At this time, the outer nut 100 has its bottom surface in contact with the upper surface (taper surface) of the tapered washer 600.
  • the metal seal 400 according to the embodiment of the present invention is inserted into the outer nut 100 in the outer nut 100.
  • the metal seal 400 is such that the inner sealing end 410 is seated in the lower seating jaw (130).
  • the metal seal 400 is connected to the end 430 and the outer sealing end 420 is made of the inner sealing end 410 and a single body so that only the inner sealing end 410 can be placed in place. If so, the other parts will naturally be in place.
  • the inner nut 200 is fastened and coupled to the bolt 20 as shown in FIG. 8.
  • the lower end portion of the inner nut 200 is located inside the outer nut 100, whereby a cylinder chamber 500 is formed between the outer nut 100 and the inner nut 200 and the upper portion thereof.
  • the clearance gap and the lower clearance gap are respectively formed.
  • the inner sealing end 410 of the metal seal 400 is located in the gap of the lower gap space (a gap between the lower seating jaw of the outer nut and the outer peripheral surface of the lower end of the inner nut). ) And the gap between the upper gap space (the upper seating jaw of the inner nut and the inner end of the outer end of the outer nut) with the outer sealing end 420 of the metal seal 400 located in the upper gap space. To close the gap). At this time, the connection end 430 of the metal seal 400 is maintained along the inner wall surface of the lower cylinder groove 120 formed in the outer nut in the cylinder chamber 500.
  • the binding nut 300 is coupled to the outer circumferential surface of the inner nut 200.
  • the binding nut 300 is coupled so that its bottom surface is in contact with the upper surface of the outer nut (100).
  • high-pressure pressure fluid is injected into the cylinder chamber 500 through the pressure oil injection hole 210 of the inner nut 200.
  • the outer nut 100 forming a part of the cylinder chamber 500 is pressed by the tapered washer 600 while pressing the two flanges 10 while the pressing force is provided downward in the drawing by the influence of the pressure fluid. More compact.
  • the inner nut 200 forming another part of the cylinder chamber 500 is provided with a pressing force upward in the drawing due to the influence of the pressure fluid, which causes the inner nut 200 to move upward. Tension the bolt 10.
  • the metal seal 400 is the inner sealing end 410 and the outer sealing end 420 made of a corrugated pipe structure, even if the tension of the bolt 20 is made of at least two points of the outer nut 100 Since it keeps in close contact with the inner circumferential surface or the outer circumferential surface of the inner nut 200, the leakage of the pressure fluid is completely prevented.
  • connection portion between the connection end 430 and the inner sealing end 410 is performed, but the outer nut ( As the corner portion formed by the lower seating jaw 130 of 100 is rounded, the connection part can be bent gently, so that the tension of the metal seal 400 can be made stable and smooth.
  • the binding nut 300 is spaced apart from the upper surface of the outer nut 100 by the tensile distance thereof. This is as shown in FIG.
  • the binding nut 300 is further bound as far as the top surface of the outer nut 100.
  • the bolt 20 is provided with a restoring force to be restored to its original state.
  • the reaction force is provided at the contact surface between the binding nut 300 and the outer nut 100, the bolt 20 is maintained in its tension, while the bolt 20 is connected to the hydraulic nut. Stronger fastening can be achieved.
  • the above-mentioned fastening process may be performed in the reverse order of the above-described fastening process.
  • the hydraulic nut according to the present invention can perform the same function as a plurality of metal seals provided to the conventional general hydraulic nut through the provision of the metal seal 400 made of a single type, while causing damage such as breakage.
  • This provides a good clamping force, such as a reactor head, but also prevents its loosening for a long time, thereby increasing maintenance periods, and causing a shutdown of the facility (eg, a reactor). It can be minimized.
  • the metal seal (4000) of the hydraulic nut according to the present invention because the inner sealing end 410 and the outer sealing end 420 is made of a single type assembly between the outer nut 100 and the inner nut 200 is Simple and accurate can be achieved.
  • the hydraulic nut according to the present invention can achieve a reduction in the manufacturing cost because the manufacturing of the metal seal 400 of the single type can be carried out by a press operation, etc., rather than by a conventional machining process. Will be.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)

Abstract

La présente invention concerne un écrou hydraulique, qui comprend un joint métallique tubulaire ayant une extrémité supérieure logée dans un espace entre un écrou interne et un écrou externe formé par une mâchoire de logement supérieure et une extrémité inférieure logée dans un espace entre l'écrou externe et l'écrou interne formé par une mâchoire de logement inférieure, le joint métallique tubulaire étant conçu pour séparer une chambre de cylindre formée par une rainure de cylindre inférieure et une rainure de cylindre supérieure de l'environnement externe. Par conséquent, la présente invention concerne un écrou hydraulique ayant un nouveau type de joint métallique qui peut être traité et assemblé facilement et avec précision, empêcher une rupture grâce à une excellente durée de vie, et empêcher l'apparition d'une fuite de pression.
PCT/KR2015/013124 2015-11-20 2015-12-03 Écrou hydraulique WO2017086527A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20150163361 2015-11-20
KR10-2015-0163361 2015-11-20

Publications (1)

Publication Number Publication Date
WO2017086527A1 true WO2017086527A1 (fr) 2017-05-26

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ID=58717454

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Application Number Title Priority Date Filing Date
PCT/KR2015/013124 WO2017086527A1 (fr) 2015-11-20 2015-12-03 Écrou hydraulique

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WO (1) WO2017086527A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800010642A1 (it) * 2018-11-28 2020-05-28 Vetroresina Eng Development Srl Metodo di assiemaggio di giunti flangiati in tubature

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010010709A (ko) * 1999-07-22 2001-02-15 이경호 유압식 피스턴 너트
KR100621129B1 (ko) * 2004-06-16 2006-09-19 이영식 유공압 너트
KR100915866B1 (ko) * 2008-10-10 2009-09-07 유원주 유압식 너트
KR20100070726A (ko) * 2008-12-18 2010-06-28 배정식 유압식 너트
JP2011202760A (ja) * 2010-03-26 2011-10-13 Nok Corp 密封装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010010709A (ko) * 1999-07-22 2001-02-15 이경호 유압식 피스턴 너트
KR100621129B1 (ko) * 2004-06-16 2006-09-19 이영식 유공압 너트
KR100915866B1 (ko) * 2008-10-10 2009-09-07 유원주 유압식 너트
KR20100070726A (ko) * 2008-12-18 2010-06-28 배정식 유압식 너트
JP2011202760A (ja) * 2010-03-26 2011-10-13 Nok Corp 密封装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800010642A1 (it) * 2018-11-28 2020-05-28 Vetroresina Eng Development Srl Metodo di assiemaggio di giunti flangiati in tubature

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