CN107957310B - Measuring device for threaded fastener of oil pipe joint - Google Patents
Measuring device for threaded fastener of oil pipe joint Download PDFInfo
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- CN107957310B CN107957310B CN201711157265.2A CN201711157265A CN107957310B CN 107957310 B CN107957310 B CN 107957310B CN 201711157265 A CN201711157265 A CN 201711157265A CN 107957310 B CN107957310 B CN 107957310B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0042—Force sensors associated with force applying means applying a torque
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
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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
- Y02E10/20—Hydro energy
Abstract
The invention relates to the field of performance test of oil pipe joints and discloses a measuring device for a threaded fastener of an oil pipe joint, which comprises a torque applying mechanism, an external threaded part of the oil pipe joint coaxially connected with the output end of the torque applying mechanism, an adapter joint matched with the external threaded part, and a force conduction detecting mechanism connected with the adapter joint, wherein the force conduction detecting mechanism is used for conducting and detecting the pretightening force and friction torque of the external threaded part on the conical surface part in the screwing process, an oil pipe is arranged in the external threaded part, one end of the oil pipe passes through the torque applying mechanism and is connected with the external threaded part, the other end of the oil pipe is connected with the pipe torque detecting mechanism, and the force conduction detecting mechanism, the pipe torque detecting mechanism and the output end of the torque applying mechanism are coaxially arranged. The device has compact structure and simple operation, and is convenient for popularization and promotion.
Description
Technical Field
The invention relates to the field of performance test of oil pipe joints, in particular to a measuring device for threaded fasteners of oil pipe joints.
Background
The threaded fastener connecting system is most widely applied in the form of a bolt-nut connecting pair, and most of the threaded fastener connecting system is applied under the action of pretightening force, so that the reliability of the bolt connection can be improved, and the tightness and the rigidity of a connected body can be enhanced. In a threaded fastener connection system, when the pre-tightening force is not available or insufficient, the connection cannot be truly performed, which is generally called under-tightening; too high a preload or over-threading can also lead to failure of the threaded connection.
For special construction of threaded fasteners such as tubing connectors in brake pipe, it is required according to the congren standard of the german public to determine the forces and moments acting in the connection when tightening a brake pipe bolt, which forces and moments depend on the magnitude of the tightening torque. The bolting of the brake pipe bolts is determined by the bolts, nuts, pipes with fittings and their surface structure, and these moments and forces should be measured in a suitable test apparatus, including pretension, friction torque, pipe torque, thread torque, tightening torque, etc. The screw pairing can be performed with either a raw bolt and brake pipe, a nut made of raw material or a material that has proved to have equivalent properties, or alternatively with a pipe bolt and nut thread made of an alternative material, in which case the results of the surface pairing of pipe bolt-nut threads used in the respective modes are proved to be comparable in one principle test. At present, no machine capable of testing the physical parameters, particularly the pretightening force is available at home, enterprises in industry mainly adopt Korean manufactured machines, and the external screw thread piece and an iron plate with an internal screw hole are used for measuring the physical parameters in a screw pairing mode.
Disclosure of Invention
The invention provides a measuring device for a threaded fastener of an oil pipe joint, which solves the problems that the existing measuring equipment mainly depends on import, and has long period, inconvenient maintenance, low measuring accuracy and the like.
The invention can be realized by the following technical scheme:
the utility model provides a measuring device for oil pipe joint threaded fastener, includes the moment of torsion applying mechanism, with the coaxial outer screw member that links to each other of output of moment of torsion applying mechanism, with outer screw member complex crossover sub, the crossover sub include separated internal thread portion and conical surface portion, with the force conduction detection mechanism that the crossover sub links to each other, force conduction detection mechanism is used for the conduction and detects the pretightning force and the friction torque of screw member to conical surface portion in the screwing up in-process, the inside oil pipe that is provided with of outer screw member, the one end of oil pipe passes moment of torsion applying mechanism and links to each other with the outer screw member, and the other end links to each other with pipe moment of torsion detection mechanism, pipe moment of torsion measuring mechanism is arranged in detecting the pipe moment of torsion of screwing up in-process introduction, force conduction detection mechanism, pipe moment of torsion detection mechanism and the coaxial setting of output of moment of torsion applying mechanism.
Further, the force conduction detection mechanism comprises an internal thread part fixing piece, a conical surface part fixing piece and a force conduction rod which are coaxially sleeved in sequence, one end of the force conduction rod is horizontally connected with the conical surface part fixing piece, the other end of the force conduction rod is connected with the friction torque detection mechanism, the friction torque detection mechanism is used for detecting friction torque of the external thread part to the conical surface part in the screwing process, a first force sensor and a pressure bearing are sleeved on the force conduction rod, the pressure bearing is used for transmitting pretightening force of the external thread part to the conical surface part to the first force sensor, and the first force sensor is used for measuring pretightening force of the external thread part to the conical surface part in the screwing process.
Further, the friction torque detection mechanism comprises a force arm rod, one end of the force arm rod is vertically connected with the other end of the force transmission rod, the other end of the force arm rod is in contact with a second force sensor, the second force sensor is used for measuring friction torque of the external screw thread piece to the conical surface part in the screwing process, or the other end of the force arm rod is fixed, a plurality of strain gauges are adhered to the surface of the force transmission rod, and the strain gauges are used for measuring mechanical deformation of the force transmission rod due to friction torque of the external screw thread piece to the conical surface part in the screwing process; or the friction torque detection mechanism comprises a first static torque sensor which is sleeved at the other end of the force transmission rod and is used for measuring the friction torque of the external screw thread piece to the conical surface part in the screwing process.
Further, the one end of power conducting rod is provided with the jack that the degree of depth extends along axial direction, the jack cooperates with the one end of the facial mounting of circular cone, the other end of the facial mounting of circular cone cooperates with the circular cone, the radial cross-section of jack is C type, and the C type opening part of perpendicular to jack is provided with the locking bolt, be provided with the ring board on the power conducting rod, the ring board is in the same place fixed with first force transducer through pressure bearing.
Furthermore, the conical surface fixing piece adopts a cross rod-shaped structure, the internal thread fixing piece adopts a sleeve structure, and the internal thread and the conical surface are nested in the internal thread fixing piece.
Further, the pipe torque detection mechanism comprises an oil pipe locking clamp and a second static torque sensor connected with the oil pipe locking clamp, through holes for the oil supply pipe to pass through are formed in the centers of the oil pipe locking clamp and the second static torque sensor, and the second static torque sensor is used for measuring pipe torque led into the oil pipe in the screwing process.
Further, the torque applying mechanism comprises a servo motor, an output shaft of the servo motor is connected with one end of a belt transmission mechanism, the other end of the belt transmission mechanism is connected with one end of a hollow transmission shaft, the other end of the transmission shaft is connected with a rotating shaft of one end of a dynamic torque sensor through a coupler, the rotating shaft of the other end of the dynamic torque sensor is connected with an external screw through a clamp sleeve and a sleeve nested in the center of the clamp sleeve, a through hole for an oil supply pipe to pass through is formed in the center of the dynamic torque sensor and used for measuring tightening torque in a tightening process, and the sleeve is used for fixing the external screw.
Further, the force transmission detection mechanism is arranged on a moving platform, and the moving platform is used for enabling the force transmission detection mechanism to move along the direction of the central line of the output end of the torque application mechanism.
Further, a tightness detection device of the oil pipe joint is arranged on the side face of the moving platform, and the moving platform is used for enabling the tightness detection device to move along the direction perpendicular to the central line of the output end of the torque applying mechanism.
Further, moving platform includes L type base plate, L type base plate's top surface is provided with the power conduction detection mechanism, and the bottom surface is provided with one or more first slide rail that is parallel to each other, the setting direction of first slide rail is parallel with the central line of the output of mechanism is applyed to the moment of torsion, first slide rail sets up on horizontal base plate, horizontal base plate's bottom surface is provided with one or more second slide rail that is parallel to each other, the second slide rail sets up on the bottom plate, and is perpendicular mutually with the setting direction of first slide rail.
Further, the tightness detection device comprises a gas introduction mechanism arranged on the long side of the L-shaped substrate and an adapter fixing piece arranged on the short side of the L-shaped substrate, the gas introduction mechanism comprises a gas storage tank, a gas introduction port and an oil pipe connecting port are arranged at the top end of the gas storage tank, pressure sensors are arranged at the gas introduction port and the oil pipe connecting port, a through hole for the adapter to pass through is formed in the center of the adapter fixing piece, and the center of the through hole is located on the central line of the output end of the torque applying mechanism.
The beneficial technical effects of the invention are as follows:
the internal thread part and the conical surface part of the adapter are separated and fixed, the torque applying mechanism is utilized to drive the external thread part to rotate, the external thread part is matched with the internal thread part of the adapter, and then the binding force is conducted to the detection mechanism, so that the pretightening force of the oil pipe joint can be directly detected, the blank of the test in China is filled, meanwhile, the friction torque, the pipe torque and the tightness of the oil pipe joint can be detected, the one-time detection of each effective physical parameter of the oil pipe joint is realized, the basis is provided for the analysis of the oil pipe joint, the operation steps and time are saved, the test accuracy is improved, and in addition, the whole device has a compact structure and simple operation, is convenient to popularize and popularize, and has important significance for improving the quality of the oil pipe joint and scientifically using the oil pipe joint.
Drawings
FIG. 1 is a schematic overall construction of the whole of the present invention;
FIG. 2 is a schematic axial cross-section of the whole of the present invention;
FIG. 3 is a schematic view of the oil pipe joint according to the present invention;
FIG. 4 is an enlarged schematic view of portion A of FIG. 2 in accordance with the present invention;
FIG. 5 is a schematic structural view of a torque applying mechanism and a tube torque sensing mechanism of the present invention;
FIG. 6 is a schematic diagram of a force transmission detection mechanism according to the present invention;
FIG. 7 is a schematic view of a force-transmitting rod of the present invention;
FIG. 8 is a schematic diagram of a mobile platform and a seal detection mechanism according to the present invention;
the device comprises a 1-torque applying mechanism, a 11-servo motor, a 12-belt transmission mechanism, a 13-transmission shaft, a 14-coupling, a 15-dynamic torque sensor, a 16-clamp sleeve, a 17-sleeve, a 2-oil pipe joint, a 21-external screw member, a 22-adapter, a 221-internal screw portion, a 222-conical surface portion, a 3-force transmission detection mechanism, a 31-internal screw portion fixing member, a 32-conical surface portion fixing member, a 33-force transmission rod, a 331-jack, a 332-annular plate, a 34-first force sensor, a 35-pressure bearing, a 36-force arm rod, a 37-second force sensor, a 4-pipe torque detection mechanism, a 41-oil pipe locking clamp, a 42-second static torque sensor, a 5-moving platform, a 51-L-shaped substrate, a 52-first sliding rail, a 53-horizontal substrate, a 54-second sliding rail, a 55-bottom plate, a 6-tightness detection device, a 61-adapter fixing member, a 62-air storage tank, a 63-gas inlet and a 64-pressure sensor.
Detailed Description
Specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, 2, 3 and 4, the invention provides a measuring device for a threaded fastener of an oil pipe joint, which comprises a torque applying mechanism 1, an external screw member 21 of the oil pipe joint 2 coaxially connected with the output end of the torque applying mechanism 1, and an adapter 22 matched with the external screw member 21, wherein the adapter 22 comprises a separated internal screw thread part 221 and a conical surface part 222, a force conduction detecting mechanism 3 connected with the adapter 22, the force conduction detecting mechanism 3 is used for conducting and detecting the pretightening force and friction torque of the external screw member 21 to the conical surface part 222 in the screwing process, an oil pipe 23 is arranged inside the external screw member 21, one end of the oil pipe 23 passes through the torque applying mechanism 1 and is connected with the external screw member 21, the other end of the oil pipe 23 is connected with a pipe torque detecting mechanism 4, and the force conduction detecting mechanism 3 and the pipe torque detecting mechanism 4 are coaxially arranged with the output end of the torque applying mechanism 1, so that the detection of each effective physical parameter of the oil pipe joint 2 can be simultaneously realized, and the operating efficiency is improved.
Referring to fig. 5, the torque applying mechanism 1 includes a servo motor 11, an output shaft of the servo motor 11 is connected to one end of a belt transmission mechanism 12, the other end of the belt transmission mechanism 12 is connected to one end of a hollow transmission shaft 13, the other end of the transmission shaft 13 is connected to a rotation shaft of one end of a dynamic torque sensor 15 through a coupling 14, the rotation shaft of the other end of the dynamic torque sensor 15 is connected to an external screw member 21 through a clamp sleeve 16 and a sleeve 17 nested in the center of the clamp sleeve 16, the dynamic torque sensor 15 is used for measuring tightening torque during tightening, and a through hole through which an oil supply pipe passes is provided in the center thereof.
One end of the clamp sleeve 16 is connected with the rotating shaft at the other end of the dynamic torque sensor 15, the other end of the clamp sleeve is connected with the sleeve 17, the sleeve 17 is used for fixing the external screw member 21, a Schdan sleeve can be adopted, the sleeve size is selected according to the external screw members with different sizes, in this way, the clamp sleeve 16 can be made into a fixed size, and the clamp sleeve is similar to a structure for disassembling or assembling an inner hexagon bolt by utilizing an electric gun and an inner hexagon tool matched with the electric gun, so that the clamp sleeve 16 with various sizes is saved to be manufactured to be suitable for the sleeve 17.
The belt drive 12 comprises a main drive wheel connected to the output shaft of the servomotor 11, which is connected to a secondary drive wheel via a flexible belt, the centre of which is provided with a drive shaft 13, which can be driven with a friction belt or with a meshing belt.
Referring to fig. 6, the force transmission detecting mechanism 3 includes an internal screw part fixing member 31, a conical surface part fixing member 32 and a force transmission rod 33 coaxially sleeved in sequence, one end of the force transmission rod 33 is horizontally connected with the conical surface part fixing member 32, a first force sensor 34 and a pressure bearing 35 are sleeved on the force transmission rod 33, the pressure bearing 35 is used for transmitting the pretightening force of the external screw part 21 to the conical surface part 222 to the first force sensor 34, and the first force sensor 34 is used for measuring the pretightening force.
One end of the force transmission rod 33 is vertically connected with one end of the force arm rod 36, the force transmission rod 33 and the force arm rod 36 can be connected through flat keys, splines and the like, the other end of the force arm rod 36 is contacted with a second force sensor 37, the second force sensor 37 is used for measuring friction torsion of the external screw 21 to the conical surface 222 in the screwing process, the force transmission rod can be horizontally placed or vertically placed, according to actual needs, and then according to a calculation formula of the torsion, the length of the binding force arm rod 36 can obtain the friction torsion of the external screw 21 to the conical surface 222; or the measurement of the friction torque can be realized in other ways, for example, the other end of the force arm rod 36 is fixed, a plurality of strain gauges are stuck on the surface of the force transmission rod 33, the strain gauges are used for measuring the friction torque of the external screw thread piece 21 on the conical surface 222 in the screwing process, the mechanical deformation caused on the force transmission rod 33 can also be used for obtaining the friction torque through some circuit conversion; for example, the other end of the force transmission rod 33 is directly sleeved with a first static torque sensor, so that the friction torque of the external screw 21 to the conical surface 222 in the screwing process can be directly measured by using the first static torque sensor.
Referring to fig. 7, one end of the force transmission rod 33 is provided with a socket 331 having a depth extending in an axial direction, the socket 331 is engaged with one end of the conical surface part 32, the other end of the conical surface part 32 is engaged with the conical surface part 221, a radial cross section of the socket 331 is C-shaped, a locking bolt is provided at a C-shaped opening perpendicular to the socket 331, a circular plate 332 is provided on the force transmission rod 33, and the circular plate 332 is fixed with the first force sensor 34 through a pressure bearing 35.
The internal thread part fixing piece 31 adopts a sleeve structure, the conical surface part fixing piece 32 adopts a cross rod-shaped structure, thus, the separated internal thread part 221 and the conical surface part 222 are simultaneously nested in the internal thread part fixing piece 31, one end of the conical surface part fixing piece 32 of the cross rod-shaped structure is inserted into the conical surface part 222, the other end of the conical surface part fixing piece 32 of the cross rod-shaped structure is inserted into the insertion hole 331 of the force transmission rod 33, the two parts are locked and fixed together by using a locking bolt, when the size of the conical surface part 222 of the detected oil pipe joint changes, only the conical surface part fixing piece 32 of the cross rod-shaped structure needs to be replaced, and for the conical surface part fixing piece 32, the detection of the oil pipe joints with various different sizes can be met as long as the outer diameter of one end of the cross rod-shaped structure is changed, so that the cost is saved, and the application range of the whole device can be expanded.
Referring to fig. 5, the pipe torque detecting mechanism 4 includes a pipe locking clamp 41, a second static torque sensor 42 connected to the pipe locking clamp 41, and through holes through which the oil pipe 23 passes are provided in the centers of the pipe locking clamp 41 and the second static torque sensor 42, so that the oil pipe 23 can be directly fixed to the second static torque sensor 42 through the pipe locking clamp 42, thereby realizing the measurement of the pipe torque.
In addition, referring to fig. 1, 2 and 8, the whole force transmission detecting mechanism 3 is provided on the moving platform 5, the force transmission detecting mechanism 3 can be moved along the direction of the center line of the output end of the torque applying mechanism 1 by the moving platform 5, the external screw member 21 is driven to rotate by the torque applying mechanism 1, and the internal screw portion 221 in the force transmission detecting mechanism 3 is screwed in with the external screw member 21 until contacting the conical surface portion 222 by the moving platform 5, thereby completing the whole measuring process. The measuring device can measure pretightening force, tightening torque, friction torque and pipe torque, and can calculate the screw torque according to the PV3227 chapter of the Congress standard of the German public, thereby completing the measurement of all effective physical parameters.
Referring to fig. 8, a tightness detecting device 6 of the oil pipe joint 2 is disposed on a side surface of a moving platform 5, the moving platform 5 is used for moving the tightness detecting device 6 along a direction perpendicular to a central line of an output end of the torque applying mechanism 1, and the moving platform 5 is used for moving the force transmission detecting mechanism 3 and the tightness detecting device along two mutually perpendicular directions, so that the tightness of another performance parameter of the oil pipe joint 2 is conveniently tested, and therefore measurement of a plurality of parameters is achieved on the same device.
Referring to fig. 8, the moving platform 5 includes an L-shaped base plate 51, a force transmission detecting mechanism 3 is disposed on a top surface of the L-shaped base plate 51, one or more first sliding rails 52, such as two, parallel to each other are disposed on a bottom surface of the L-shaped base plate 51, a direction of disposing the first sliding rails 52 is parallel to a center line of an output end of the torque applying mechanism 1, the first sliding rails 52 are disposed on a horizontal base plate 53, one or more second sliding rails 54, such as two, parallel to each other are disposed on a bottom surface of the horizontal base plate 53, the second sliding rails 54 are perpendicular to a direction of disposing the first sliding rails 52, and the second sliding rails 54 are disposed on a bottom plate 55, so that movement in two directions of the force transmission detecting mechanism 3 and the tightness detecting device 6 disposed on the L-shaped base plate 51 is achieved by the first sliding rails 52 and the second sliding rails 54 disposed perpendicular to each other.
Referring to fig. 8, the tightness detecting apparatus 6 includes a gas introduction mechanism provided on a long side of the L-shaped substrate 51, and a crossover sub mount 61 provided on a short side of the L-shaped substrate 51, the gas introduction mechanism including a gas tank 62, a gas introduction port 63 and a fuel pipe connection port provided at a tip of the gas tank 62, pressure sensors 64 provided at both the gas introduction port 63 and the fuel pipe connection port, a through hole provided at a center of the crossover sub mount 61 for passing through the crossover sub 22, the through hole being centered on a center line of an output end of the torque applying mechanism 1, so that a relevant part of the fuel pipe joint 2 to be measured is mounted on a corresponding position, the male screw 21 and the crossover sub 22 are automatically engaged and screwed by the torque applying mechanism 1, and then the gas is introduced into the gas tank 62 through the gas introduction port 63, and whether or not detection values of the pressure sensors 64 provided at the gas introduction port and the fuel pipe connection port are identical is checked, thereby determining whether or not the fuel pipe joint 2 to be measured is leaked.
According to the invention, the internal thread part and the conical surface part of the adapter are separated and fixed, the torque applying mechanism is utilized to drive the external thread part to rotate and is matched with the internal thread part of the adapter, and then the binding force is conducted to the detection mechanism, so that the pretightening force of the oil pipe joint can be directly detected, the blank of the test in China is filled, meanwhile, the friction torque, the pipe torque and the tightness of the oil pipe joint can be detected, the one-time detection of each effective physical parameter of the oil pipe joint is realized, the basis is provided for the analysis of the oil pipe joint, the operation steps and time are saved, the test accuracy is improved, and in addition, the whole device has a compact structure, is simple to operate, is convenient to popularize and popularize, and has important significance in improving the quality of the oil pipe joint and scientifically using the oil pipe joint.
While particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely illustrative, and that many changes and modifications may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (8)
1. A measuring device for threaded fasteners of oil pipe joints, characterized in that: the device comprises a torque applying mechanism, an external screw thread part of an oil pipe joint coaxially connected with the output end of the torque applying mechanism, and an adapter joint matched with the external screw thread part, wherein the adapter joint comprises a separated internal screw thread part and a conical surface part, and a force conduction detecting mechanism connected with the adapter joint;
the force conduction detection mechanism comprises an internal thread part fixing piece, a conical surface part fixing piece and a force conduction rod which are coaxially sleeved in sequence, one end of the force conduction rod is horizontally connected with the conical surface part fixing piece, the other end of the force conduction rod is connected with the friction torque detection mechanism, the friction torque detection mechanism is used for detecting friction torque of the external thread part to the conical surface part in the screwing process, a first force sensor and a pressure bearing are sleeved on the force conduction rod, the pressure bearing is used for transmitting pretightening force of the external thread part to the conical surface part to the first force sensor, and the first force sensor is used for measuring pretightening force of the external thread part to the conical surface part in the screwing process;
the friction torque detection mechanism comprises a force arm rod, one end of the force arm rod is vertically connected with the other end of the force transmission rod, the other end of the force arm rod is in contact with a second force sensor, the second force sensor is used for measuring friction torque of an external thread piece on a conical surface part in the screwing process, or the other end of the force arm rod is fixed, a plurality of strain gauges are adhered to the surface of the force transmission rod, and the strain gauges are used for measuring mechanical deformation of the force transmission rod due to friction torque of the external thread piece on the conical surface part in the screwing process; or the friction torque detection mechanism comprises a first static torque sensor which is sleeved at the other end of the force transmission rod and is used for measuring friction torque of the external screw thread piece to the conical surface part in the screwing process.
2. The measurement device for an oil pipe joint threaded fastener of claim 1, wherein: the utility model discloses a force transmission device, including power transmission rod, conical surface mounting, pressure bearing, locking bolt, force transmission rod, pressure bearing, the one end of power transmission rod is provided with the jack that the degree of depth extends along axial direction, the jack cooperates with the one end of conical surface mounting, the other end and the conical surface cooperation of conical surface mounting, the radial cross-section of jack is C, and the C opening part of perpendicular to jack is provided with locking bolt, be provided with the ring board on the power transmission rod, the ring board is in the same place fixed with first force transducer through pressure bearing.
3. The measurement device for an oil pipe joint threaded fastener of claim 2, wherein: the conical surface fixing piece adopts a cross rod-shaped structure, the internal thread fixing piece adopts a sleeve structure, and the internal thread and the conical surface are nested in the internal thread fixing piece.
4. The measurement device for an oil pipe joint threaded fastener of claim 1, wherein: the pipe torque detection mechanism comprises an oil pipe locking clamp and a second static torque sensor connected with the oil pipe locking clamp, wherein through holes for the oil pipe to pass through are formed in the centers of the oil pipe locking clamp and the second static torque sensor, and the second static torque sensor is used for measuring the pipe torque led into the oil pipe in the screwing process.
5. The measurement device for an oil pipe joint threaded fastener of claim 1, wherein: the torque applying mechanism comprises a servo motor, an output shaft of the servo motor is connected with one end of a belt transmission mechanism, the other end of the belt transmission mechanism is connected with one end of a hollow transmission shaft, the other end of the transmission shaft is connected with a rotating shaft of one end of a dynamic torque sensor through a coupler, the rotating shaft of the other end of the dynamic torque sensor is connected with an external screw through a clamp sleeve and a sleeve nested in the center of the clamp sleeve, a through hole for an oil supply pipe to pass through is formed in the center of the dynamic torque sensor and used for measuring tightening torque in a tightening process, and the sleeve is used for fixing the external screw.
6. The measurement device for an oil pipe joint threaded fastener of claim 1, wherein: the force conduction detection mechanism is arranged on the moving platform, an oil pipe joint tightness detection device is arranged on the side face of the moving platform, and the moving platform is used for enabling the force conduction detection mechanism to move along the direction of the central line of the output end of the torque application mechanism and enabling the tightness detection device to move along the direction perpendicular to the central line of the output end of the torque application mechanism.
7. The measurement device for an oil pipe joint threaded fastener of claim 6, wherein: the mobile platform comprises an L-shaped substrate, wherein a force conduction detection mechanism is arranged on the top surface of the L-shaped substrate, one or more first sliding rails which are parallel to each other are arranged on the bottom surface of the L-shaped substrate, the arrangement direction of the first sliding rails is parallel to the central line of the output end of the torque applying mechanism, the first sliding rails are arranged on the horizontal substrate, one or more second sliding rails which are parallel to each other are arranged on the bottom surface of the horizontal substrate, and the second sliding rails are arranged on the bottom plate and are perpendicular to the arrangement direction of the first sliding rails.
8. The measurement device for an oil pipe joint threaded fastener of claim 7, wherein: the tightness detection device comprises a gas introduction mechanism arranged on the long side of the L-shaped substrate and an adapter fixing piece arranged on the short side of the L-shaped substrate, wherein the gas introduction mechanism comprises a gas storage tank, the top end of the gas storage tank is provided with a gas introduction port and an oil pipe connecting port, pressure sensors are arranged at the gas introduction port and the oil pipe connecting port, the center of the adapter fixing piece is provided with a through hole for the adapter to pass through, and the center of the through hole is positioned on the central line of the output end of the torque applying mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711157265.2A CN107957310B (en) | 2017-11-20 | 2017-11-20 | Measuring device for threaded fastener of oil pipe joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711157265.2A CN107957310B (en) | 2017-11-20 | 2017-11-20 | Measuring device for threaded fastener of oil pipe joint |
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| CN107957310A CN107957310A (en) | 2018-04-24 |
| CN107957310B true CN107957310B (en) | 2023-07-04 |
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|---|---|---|---|---|
| CN108956077A (en) * | 2018-07-23 | 2018-12-07 | 上汽通用五菱汽车股份有限公司 | Multi-functional screw connection structure pilot system and performance optimization method |
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