CN113478436A - Large-diameter large-pitch thread tightening device and manufacturing method thereof - Google Patents
Large-diameter large-pitch thread tightening device and manufacturing method thereof Download PDFInfo
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- CN113478436A CN113478436A CN202110730315.1A CN202110730315A CN113478436A CN 113478436 A CN113478436 A CN 113478436A CN 202110730315 A CN202110730315 A CN 202110730315A CN 113478436 A CN113478436 A CN 113478436A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention relates to a large-diameter large-pitch thread fastener tightening device for tightening and disassembling a large-diameter large-pitch thread fastener connected to an end face and a manufacturing method thereof Convenient connection and disassembly, safety and reliability.
Description
Technical Field
The invention belongs to the technical field of machine manufacturing, and particularly relates to a large-diameter large-pitch thread fastener tightening device and a manufacturing method thereof when a large-diameter large-pitch thread fastener is connected and tightened and disassembled on an end face.
Background
At present, China is developing aerospace industry vigorously, and the basis of the development is to establish various types of wind tunnel test equipment, and the main components of a wind tunnel are high-pressure gas generating devices: high pressure pipe systems, which are generally composed of 8-15 branch pipes, are sealed at the end faces, and are connected in the form of a hoop, or a large-pitch thread. The pipe body is connected in a threaded mode, and the pipe body is difficult to tighten and disassemble due to the fact that the diameter of a workpiece is large, the weight is heavy, the thread pitch of a thread buckle is large, and therefore a reasonable method is needed for tightening and disassembling.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a large-diameter large-pitch thread tightening device and a manufacturing method thereof, wherein the large-diameter large-pitch thread tightening device can butt-joint a positive-thread pipe body, a negative-thread pipe body and a positive-thread sleeve with large diameter, large pitch and heavy weight.
The purpose of the invention is realized as follows: the utility model provides an end connection major diameter coarse pitch thread fastener tightening device, including the major diameter, the body is detained to the positive screw thread of coarse pitch, the body is detained to the left-hand thread, detain the body with the positive screw thread, the left-hand thread detains the positive and negative thread sleeve that the body docks together, it has the outer hoop of sawtooth to pass through the bolt fastening outside the positive and negative thread sleeve, respectively have a caliper group on positive and negative thread sleeve both sides and detain the body respectively with the positive screw thread, the body chucking is detained to the left-hand thread and is connected, two caliper groups are in the same place through cross axle fixed connection, install the jack base on the cross axle, install hydraulic jack on the jack base, hydraulic jack, the jack base, the cross axle links together with caliper group, the jack is in turn pushed up the vacancy department on sawtooth outer hoop both sides.
The clamping jaw group clamps the positive thread buckle pipe body and the negative thread buckle pipe body through the flat jaw inside the clamping jaw group and is connected with the pipe body together.
The hydraulic jack extends upwards to prop to the vacant positions on two sides of the outer sawtooth hoops, the outer sawtooth hoops drive the forward and reverse threaded sleeves to rotate, the forward and reverse threaded sleeves rotate relative to the forward and reverse threaded sleeves, and the purpose of tightening the threaded fasteners is achieved; if the hydraulic jack extends downwards to prop to the vacant positions on the two sides of the sawtooth outer hoop, the purpose of loosening the thread button is achieved.
The jack base is movably arranged on the cross shaft.
The tightening device for the end face connection large-diameter and large-pitch thread button has the beneficial effects that the large-diameter and large-pitch thread button can be easily tightened or loosened by using a hydraulic jack. The invention uses a hydraulic jack, a jack base and a cross shaft to connect a caliper group, a pipe body, a sawtooth outer hoop and a threaded sleeve together to form a closed acting force circulation system, so that two caliper groups on two sides of the threaded sleeve are respectively connected with the pipe body and then connected with the cross shaft, the jack base is seated on the cross shaft, the jack can alternatively jack to the vacant positions on two sides of the sawtooth outer hoop, the upper part of the hydraulic jack extends to the sawtooth outer hoop, the sawtooth outer hoop transmits force to the threaded sleeve, and the lower part of the hydraulic jack presses downwards at the same time, so that the force is transmitted to the pipe body through the jack base, the cross shaft and the caliper group. The hydraulic jack extends to prop the gap of the outer saw-tooth hoop, the outer saw-tooth hoop drives the threaded sleeve, the threaded sleeve rotates relative to the pipe body, the purpose of tightening the threaded fastener is achieved, and the threaded fastener can be loosened by pushing downwards after the hydraulic jack is placed downwards. Therefore, the invention has the advantages of novel structure, convenient connection and disassembly, safety and reliability.
Drawings
FIG. 1 is a schematic view showing the connection of the end surfaces of a large-diameter large-pitch threaded box male and female pipe bodies and a threaded box male and female sleeve according to the present invention.
Figure 2 is a tightening schematic of the present invention.
FIG. 3 is a schematic sectional view A-A of the present invention.
FIG. 4 is a schematic cross-sectional view B-B of the present invention.
Detailed Description
As shown in fig. 1, the invention comprises a large-diameter large-pitch positive thread buckle pipe body 1, a large-pitch negative thread buckle pipe body 3, and a positive and negative thread buckle sleeve 2 for butting the positive thread buckle pipe body 1 and the negative thread buckle pipe body 3 together.
As shown in figure 2, the invention comprises a positive thread buckle pipe body 1 and a negative thread buckle pipe body 3 which are large in diameter and large in thread pitch, a positive and negative thread buckle sleeve 2 which butt-joints the positive thread buckle pipe body 1 and the negative thread buckle pipe body 3 together, a sawtooth outer hoop 4 is fixed outside the positive and negative thread buckle sleeve 2 through a bolt 7, a caliper group 5 is respectively arranged at two sides of the positive and negative thread buckle sleeve 2 and is tightly connected with the positive thread buckle pipe body 1 and the negative thread buckle pipe body 3, the two caliper groups 5 are fixedly connected together through a cross shaft 6, a jack base 9 is arranged on the cross shaft 6, a hydraulic jack 8 is arranged on the jack base 9, the hydraulic jack 8, the jack base 9 and the cross shaft 6 are connected with the caliper groups 5, and the jack alternately jacks the vacancy positions at two sides of the sawtooth outer hoop 4. On the way, the sawtooth outer hoop 4 is connected with the positive and negative thread sleeve 2 through the bolt 7, and then connected with the caliper group 5 through the hydraulic jack 8, the jack base 9 and the cross shaft 6, and the caliper group 5 clamps the positive thread buckle pipe body 1 and the negative thread buckle pipe body 3.
As shown in fig. 3, how the clamping jaw set 5 clamps the positive thread fastening pipe body 1 and the negative thread fastening pipe body 3 is shown.
As shown in fig. 4, the lower part of the hydraulic jack 8 is shown to be pressed downwards, force is transmitted to the positive thread buckle pipe body 1 and the negative thread buckle pipe body 3 through the jack base, the cross shaft and the caliper group, so that the upper part of the hydraulic jack 8 extends to prop against the sawtooth outer hoop 4, the force is transmitted to the positive and negative thread buckle threaded sleeve 2, the positive and negative thread buckle threaded sleeve 2 rotates relative to the positive thread buckle pipe body 1 and the negative thread buckle pipe body 3, and the purpose of tightening the thread buckle is achieved.
The invention designs a clamp group, which can clamp a pipe body with a positive thread and a negative thread through a flat jaw and is connected with the pipe body. See figure 3 for details. A sawtooth outer hoop is designed and is connected with a positive and negative threaded sleeve through a bolt. A hydraulic jack jacking device is designed and comprises a hydraulic jack, a jack base and a cross shaft. Using a hydraulic jack to jack the device: the hydraulic jack, the jack base and the cross shaft connect the caliper group, the pipe body, the sawtooth outer hoop and the threaded sleeve together to form a closed acting force circulating system. Thus, the two sides of the threaded sleeve are respectively provided with a caliper group which is connected with the pipe body and then connected through the cross shaft, the base of the jack is seated on the cross shaft, and the jack can alternatively jack the vacant positions on the two sides of the sawtooth outer hoop. The upper part of the hydraulic jack is extended to the sawtooth outer hoop, and the force is transmitted to the threaded sleeve through the sawtooth outer hoop. Meanwhile, the lower part of the hydraulic jack is pressed downwards, and force is transmitted to the pipe body through the jack base, the cross shaft and the caliper group. The hydraulic jack extends to prop the gap of the outer saw-tooth hoop, the outer saw-tooth hoop drives the threaded sleeve, and the threaded sleeve rotates relative to the pipe body to achieve the purpose of tightening the threaded fastener. If the hydraulic jack is placed downwards and pushed downwards, the thread buckle can be loosened.
The manufacturing method of the large-diameter large-pitch thread tightening device comprises the following steps:
step 1), according to the distance L between the two clamp groups 5 and the pre-tightening force F of the thread tightening, a round bar stress moment formula is used
Calculating the diameter of the transverse shaft 6;
step 2), the caliper group 5 is made of an A3 steel plate with the thickness of 60mm, the inner diameter of the caliper group is 1mm larger than the diameter of the tube body, the width of the notch at the flat part is consistent with that of the tube body, and the diameter of the notch is more than or equal to 1/5mm of the diameter of the tube body.
And step 3), the inner diameter of the sawtooth outer hoop 4 is 1mm larger than that of the positive and negative threaded sleeve 2, the wall thickness is 60mm thick, the sawtooth gap depth is 50mm, the sawtooth gap width is 100mm, and the total width of the sawtooth outer hoop 4 is 200 mm.
And step 4), the hydraulic jack requires the telescopic length to be more than or equal to 150mm and the pressure to be more than or equal to F.
Example (c): according to the method, a YS 880X 60 end face connecting pipe body and a threaded sleeve group are manufactured, the diameter of the pipe body is phi 880mm, the distance between clamping parts of caliper groups at two ends of a thread is 1500mm, the diameter of a positive and negative threaded sleeve 2 is phi 1080mm, the tightening force requirement is 40000N, and therefore a thread screwing and unscrewing device is designed, and the specific manufacturing process is as follows:
step 1, manufacturing a round bar by using a hardened and tempered 35CrMo material according to the condition that the distance L between two caliper groups 5 is 1500mm and the pretightening force F of thread tightening is 40000N, wherein the allowable stress of the 35CrMo material is [ sigma ]]230MPa, force moment formula through round bar
Calculate the diameter of the horizontal axis 6
D is 110mm after rounding.
And 2, the caliper group 5 is made of A3 steel plates with the thickness of 60mm, and the inner diameter of the caliper group 5 is 1mm larger than the diameter phi 880mm of the positive thread buckle pipe body 1 and the diameter phi of the negative thread buckle pipe body 3, namely phi 881 mm. Since 880/5 is 176, the width of the notch at the flat part is 176 mm.
And 3, the inner diameter of the sawtooth outer hoop 4 is 1mm larger than the inner diameter phi 1080mm of the positive and negative threaded sleeve 2, namely phi 1081mm, the wall thickness is 60mm, the depth of a sawtooth gap is 50mm, the width is 100mm, the total width of the sawtooth outer hoop 4 is 200mm, and the material is also 35CrMo material.
And 4, ordering a hydraulic jack with the required pressure of 50000N and the telescopic length of 180mm, and carrying a movable hydraulic station jack.
The YS 880X 60 end face connecting pipe body and the threaded sleeve group dismounting device manufactured by the method can smoothly connect and dismount the threaded sleeve and the pipe body.
Claims (5)
1. The utility model provides a major diameter coarse pitch thread tightening device, includes that the positive thread of major diameter, coarse pitch detains body (1), the body is detained to the left-hand thread body (3), detains body (1), the left-hand thread body (3) butt joint positive and negative knot threaded sleeve (2) that are in the same place, its characterized in that with the positive thread: the outer hoop (4) of sawtooth is fixed with through bolt (7) in positive and negative knot threaded sleeve (2) outside, respectively have a caliper group (5) on positive and negative knot threaded sleeve (2) both sides and detain body (1) with positive screw thread respectively, body (3) chucking is detained to the reverse screw thread and is connected, two caliper groups (5) are in the same place through cross axle (6) fixed connection, install jack base (9) on cross axle (6), install hydraulic jack (8) on jack base (9), hydraulic jack (8), jack base (9), cross axle (6) link together with caliper group (5), the jack is in the same place to the vacancy department on sawtooth outer hoop (4) both sides in turn.
2. A large diameter large pitch thread make-up device according to claim 1, wherein: the clamp group (5) clamps the positive thread buckle pipe body (1) and the negative thread buckle pipe body (3) through the flat jaw inside the clamp group and is connected with the positive thread buckle pipe body (1) or the negative thread buckle pipe body (3).
3. A large diameter large pitch thread make-up device according to claim 1, wherein: the hydraulic jack (8) extends upwards to prop to the vacant positions on two sides of the sawtooth outer hoop (4), the sawtooth outer hoop (4) drives the positive and negative thread sleeve (2) to rotate, and the positive and negative thread sleeve (2) rotates relative to the positive thread buckle pipe body (1) and the negative thread buckle pipe body (3) to achieve the purpose of tightening the thread buckles; if the hydraulic jack extends downwards to prop to the vacant positions on the two sides of the sawtooth outer hoop (4), the purpose of loosening the thread button is achieved.
4. A large diameter large pitch thread make-up device according to claim 1, wherein: the jack base (9) is movably arranged on the transverse shaft (6).
5. A method of manufacturing a large diameter large pitch thread tightening apparatus according to any one of claims 1 to 4, characterized by: the preparation method comprises the following steps:
step 1), according to the distance L between the two clamp groups (5) and the pretightening force F of the thread tightening, the round bar is stressedFormula of moment
Calculating the diameter of the transverse shaft (6);
step 2), the caliper group (5) is made of an A3 steel plate with the thickness of 60mm, the inner diameter of the caliper group is 1mm larger than the diameter of the tube body, the width of a notch at the flat part is consistent with that of the tube body, and the diameter of the notch is more than or equal to 1/5mm of the diameter of the tube body;
step 3), the inner diameter of the sawtooth outer hoop (4) is 1mm larger than the inner diameter of the positive and negative threaded sleeve (2), the wall thickness is 60mm thick, the sawtooth gap is 50mm deep and 100mm wide, and the total width of the sawtooth outer hoop is 200 mm;
and 4) the hydraulic jack requires the telescopic length to be more than or equal to 150mm and the pressure to be more than or equal to F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110730315.1A CN113478436B (en) | 2021-06-30 | 2021-06-30 | Large-diameter large-pitch thread tightening device and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110730315.1A CN113478436B (en) | 2021-06-30 | 2021-06-30 | Large-diameter large-pitch thread tightening device and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113478436A true CN113478436A (en) | 2021-10-08 |
| CN113478436B CN113478436B (en) | 2023-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110730315.1A Active CN113478436B (en) | 2021-06-30 | 2021-06-30 | Large-diameter large-pitch thread tightening device and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112284A (en) * | 2021-11-17 | 2022-03-01 | 河南中原特钢装备制造有限公司 | Sawtooth thread buckle for connecting ultrahigh pressure pipe body of wind tunnel |
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| KR20140105207A (en) * | 2013-02-22 | 2014-09-01 | 한전케이피에스 주식회사 | Locknut disassembly device for oversize impeller |
| CN204711968U (en) * | 2015-05-25 | 2015-10-21 | 上海东方泵业(集团)有限公司 | A kind of bearing lock nut erecting device |
| CN208697330U (en) * | 2018-06-21 | 2019-04-05 | 永城煤电控股集团有限公司 | The disassembly of hydraulic support column threaded guide sleeve and assembly tool |
| CN208914019U (en) * | 2018-08-29 | 2019-05-31 | 山东能源重装集团莱芜装备制造有限公司 | A kind of dynamic device of hydraulic tongs |
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2021
- 2021-06-30 CN CN202110730315.1A patent/CN113478436B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07223169A (en) * | 1994-02-10 | 1995-08-22 | Masaharu Kubokawa | Attaching and detaching jig for large diameter nut |
| US5893291A (en) * | 1998-08-21 | 1999-04-13 | Salazar; Javier | Crimping tool |
| CN101844339A (en) * | 2009-11-07 | 2010-09-29 | 广东三和管桩有限公司 | Wrench for disassembling tubular pile riveting nut |
| CN102001071A (en) * | 2010-11-18 | 2011-04-06 | 大庆井井源油田科技开发有限公司 | Bidirectional powerful socket combination wrench |
| CN202530116U (en) * | 2012-01-31 | 2012-11-14 | 宝山钢铁股份有限公司 | Big nut fastening tool for large converter three-point spherical surface support device |
| CN102756350A (en) * | 2012-07-20 | 2012-10-31 | 朱云阁 | Hydraulic wrench device |
| KR20140105207A (en) * | 2013-02-22 | 2014-09-01 | 한전케이피에스 주식회사 | Locknut disassembly device for oversize impeller |
| CN204711968U (en) * | 2015-05-25 | 2015-10-21 | 上海东方泵业(集团)有限公司 | A kind of bearing lock nut erecting device |
| CN208697330U (en) * | 2018-06-21 | 2019-04-05 | 永城煤电控股集团有限公司 | The disassembly of hydraulic support column threaded guide sleeve and assembly tool |
| CN208914019U (en) * | 2018-08-29 | 2019-05-31 | 山东能源重装集团莱芜装备制造有限公司 | A kind of dynamic device of hydraulic tongs |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112284A (en) * | 2021-11-17 | 2022-03-01 | 河南中原特钢装备制造有限公司 | Sawtooth thread buckle for connecting ultrahigh pressure pipe body of wind tunnel |
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| CN113478436B (en) | 2023-03-31 |
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