CN211401522U - Portable ultrasonic probe installs tool - Google Patents

Abstract

The utility model discloses a portable ultrasonic probe installs tool, including grip slipper, ultrasonic transducer, installation piece and clamp splice, the installation piece is opened has the installation piece screw hole that the axial link up, and ultrasonic transducer and installation piece threaded connection, installation piece are equipped with the draw-in groove, and the clamp splice have with draw-in groove complex fixed part with be used for the clamping part of clamping bolt head, the grip slipper is equipped with screws up the groove, and the fixed part is arranged in screwing up the groove. The ultrasonic probe is tightly attached to the head of the bolt, and the monitoring of the pretightening force of the bolt is more accurate.

Description

Portable ultrasonic probe installs tool

Technical Field

The utility model relates to a bolt assembly field, more specifically the saying so, it relates to a portable ultrasonic probe installs tool.

Background

Bolt connection is widely applied to various industrial fields, such as aerospace, automobiles, rail transit, bridges, wind power and the like. The bolt pretightening force is an axial force which is generated between the bolt and the connected piece along the axial lead direction of the bolt under the action of the tightening torque in the bolt screwing process. The bolt pre-tightening force control has important influence on the consistency of the assembling performance and the performance stability of the whole machine.

The bolt torsion-tension test platform is used as a basic test platform in the fastener test industry and is used for measuring the torque-pretightening force conversion capability and other properties of the bolt. The traditional test platform needs an operator to press the ultrasonic probe on the bolt head by hand, the data of the sensor is acquired at a single time, the ultrasonic bolt pretightening force monitoring is a high-precision process requirement, when the test time is too long or the test conditions are limited, the operator hardly ensures that the ultrasonic probe is firmly and tightly attached to the bolt head, the pressure is more difficult to be continuously consistent, larger errors are more caused when the bolt pretightening force monitoring is carried out, and the requirement of accurate pretightening force monitoring cannot be met. The magnetic ultrasonic probe is adsorbed on the bolt head to realize tight attachment, but for high-strength light alloy fasteners used in the field of aerospace, such as titanium alloy and high-temperature alloy fasteners which are most widely applied, the high-strength light alloy fasteners are not magnetic, and the ultrasonic probe cannot be stably attached to the bolt head in assembly.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portable ultrasonic probe installation tool has realized the inseparable laminating of ultrasonic probe and bolt head, and bolt pretightning force monitoring is more accurate.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a portable ultrasonic probe installation tool, includes grip slipper, ultrasonic transducer, installation piece and clamp splice, and the installation piece is opened has the installation piece screw hole that the axial is link up, and ultrasonic transducer and installation piece threaded connection, installation piece are equipped with the draw-in groove, and the clamp splice has with draw-in groove complex fixed part and the clamping part that is used for the clamping bolt head, and the grip slipper is equipped with screws up the groove, and the fixed part is arranged in screwing up the groove.

Preferably, the clamping groove comprises a transverse groove and a vertical groove, the transverse groove is formed along the circumferential direction of the side wall of the mounting block, the vertical groove is formed along the longitudinal direction of the side wall of the mounting block, and the vertical groove is communicated with the transverse groove.

Preferably, the clamping groove is T-shaped.

Preferably, the fixing portion is fixed to the clamping portion, and the clamping portion has a flat surface capable of being fitted to the head of the bolt.

Preferably, the bottom wall of the tightening groove is provided with a groove hole, the groove hole is communicated with the tightening groove, the mounting block comprises a thin shaft and a thick shaft, the thin shaft is in threaded fit with the groove hole, and the thick shaft is in clearance fit with the tightening groove.

Preferably, the thick shaft is in a circular truncated cone shape with a small upper part and a large lower part, and the tightening groove is matched with the thick shaft.

Preferably, the holder head is a tightening part.

Preferably, the tightening part is a plane symmetrically arranged along the axis of the clamping seat.

Preferably, the tightening part has a regular hexagonal shape.

The utility model has the advantages that:

1. the actual measurement installation jig realizes the close fitting of the ultrasonic probe and the bolt head, and the monitoring of the bolt pretightening force is more accurate.

2. The actual measurement installation jig is simple in structure, easy to carry, capable of being used for field assembly and use and simple to use.

3. This actual measurement installation tool dismantles conveniently.

Drawings

Fig. 1 is a schematic perspective view of a bolt force measurement experiment device.

Fig. 2 is a front view of the bolt force measurement experiment device.

Fig. 3 is a cross-sectional view taken along the line a-a in fig. 2.

Fig. 4 is a schematic structural diagram of the base.

Fig. 5 is a bottom view of the base.

Fig. 6 is a schematic structural view of the fixing block.

Fig. 7 is a schematic structural diagram of the lock block.

Fig. 8 is a schematic structural diagram of the working platform.

Fig. 9 is a schematic diagram of a twist-pull calibration structure.

Fig. 10 is a first form of actual measurement mounting jig.

Fig. 11 is a front view of the first jig.

Fig. 12 is a schematic structural view of the mounting block.

Fig. 13 is a schematic structural view of the splint.

Fig. 14 is a second form of actual measurement mounting jig.

Fig. 15 is a front view of the second jig.

Fig. 16 is a cross-sectional view taken along line B-B of fig. 15.

Fig. 17 is a schematic view of the engagement of the clamping block and the clamping groove.

Fig. 18 is a schematic structural view of the mounting block.

Fig. 19 is a schematic structural view of the holder.

Fig. 20 shows a third form of actual measurement mounting jig.

Fig. 21 is a front view of the third jig.

Fig. 22 is a cross-sectional view taken along line C-C of fig. 21.

Fig. 23 is a schematic structural view of a holder with a hexagonal socket as a receptacle.

Fig. 24 is a cross-sectional view taken along line D-D of fig. 23.

Fig. 25 is a schematic structural view of a mounting block.

Figure 26 shows an embodiment in which the receptacle is threaded.

Figure 27 is a schematic view of the physical assembly of the receptacle with threaded holes.

Fig. 28 is a schematic structural view of a third fixture with a press cover.

Fig. 29 is a front view of a third jig with a gland.

FIG. 30 is a cross-sectional view taken along line E-E of FIG. 23

Fig. 31 is a schematic structural view of the capping jig removed.

Fig. 32 is a physical assembly view of the third fixture.

The labels in the figure are: the bolt force measurement experiment device 1, a base 11, a through hole 111, a groove 112, a spring plunger 113, a mounting hole 1131, a through groove 114, an opening 115, a positioning groove 116, a fixed block 12, a cavity 121, a fixed block threaded hole 122, a pit 123, a chamfer 124, an unloading groove 125, an ultrasonic probe 13, a pressure ring 14, a terminal 141 and a gasket 15; the torsion-pull calibration system 2 comprises a locking block 21, a baffle 211, a groove 212, an inserting block 213, a working platform 22, a T-shaped protrusion 221, a gap 222, a bolt 23 (experimental device), a nut 24, a connected piece 25 and a hole position 251; mounting jig 3, bolt 4 (actual measurement jig), elastic element 300, clamping base 301, clamping plate 3011, elastic element fixing section 30111, movable connecting section 30112, clamping section 30113, clamping face 30114, fixing plate 30115, pin 3019, mounting block 302, mounting block threaded hole 3021, fixing hole 3022, ultrasonic probe 303, sponge 304, through hole 3041, clamping block 305, fixing portion 3051, clamping portion 3052, tightening slot 3012, tightening portion 3013, clamping slot 30223023, transverse slot 30233024, vertical slot 30243025, thin shaft 30253026, thick shaft 30263027, slotted hole 3010, cavity 306, shaft hole 3014, thick hole 30141, 30142, mounting hole 3015, tangent plane 3016, depression 30273028, flange 3029,

gland 307, pressure groove 3070, pressure groove face 3071, terminal extension hole 3072, connecting hole 3073, clamping screw 3074, annular groove 30156, cutting plane 3017 and plane bearing 308.

Detailed Description

The structures referred to in the present invention or these terms of art used are further described below. These illustrations are merely exemplary of how the present invention may be implemented and are not intended to limit the present invention in any way.

The present invention will be further described with reference to the accompanying drawings and the following detailed description. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated position or element must have a specific orientation, be constituted in a specific orientation, and be operated, and thus, are not to be construed as limitations of the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present invention, unless otherwise explicitly stated or limited, the terms "connected" and "fixed" are to be understood in a broad sense, for example, "fixed" may be a fixed connection, a detachable connection, or an integral part; either directly or indirectly through intervening media, or may be interconnected between two elements or in a relationship wherein the two elements interact, unless expressly limited otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Bolt force measuring experimental device

The utility model provides a bolt dynamometry experimental apparatus 1 can be used to the turn round of experiment assembly bolt and draw demarcation, refer to fig. 1-6. The utility model discloses a make ultrasonic probe and fixed block threaded connection, realize the in close contact with of ultrasonic probe tip and bolt head, bolt pretightning force monitoring is more accurate.

Specifically, the bolt force measurement experiment device 1 comprises a base 11, a fixing block 12 and an ultrasonic probe 13, wherein the base 11 is provided with a through hole 111 through which a bolt rod penetrates, one end of the fixing block 12 is provided with a cavity 121 matched with the head of a bolt, the other end of the fixing block is provided with a fixing block threaded hole 122 axially communicated with the cavity 121, the ultrasonic probe 13 is in threaded connection with the fixing block 12, and the through hole 111, the cavity 121 and the fixing block threaded hole 122 are located on the same axis when the fixing block 12 is installed on the base. During installation, the ultrasonic probe 13 is screwed into the fixed block 12 through the fixed block threaded hole 122, so that the end part of the ultrasonic probe 13 extends out of the cavity 121, the bolt head is placed in the cavity 121, the bolt rod part penetrates through the through hole 111, and the nut is screwed until the bolt head is tightly contacted with the end part of the probe. It should be noted that when the ultrasonic probe 13 is screwed in, the probe end must protrude into the cavity 121, and the protruding length is required to satisfy that the cavity 121 must have a certain space for placing the bolt head.

Ultrasonic bolt

The ultrasonic bolt is characterized in that a piezoelectric ceramic patch is attached to the head of the bolt so as to realize the interface effect with the bolt under the ultrasonic excitation effect. Bolt connection is widely applied to various fields, such as aerospace, automobiles, rail transit, bridges, wind power and the like. The bolt pretightening force is an axial force which is generated between the bolt and the connected piece along the axial lead direction of the bolt under the action of the tightening torque in the bolt screwing process. For a particular bolt, the amount of preload force is related to the tightening torque of the bolt, the friction between the bolt and the nut, and the friction between the nut and the connected member. The bolt pre-tightening force control has important influence on the consistency of the assembling performance and the performance stability of the whole machine. The utility model provides a bolt head is the hexagon head, the dodecagonal head, D type head etc. best, with the cavity adaptation of fixed block to satisfy the requirement of restriction bolt head rotational degree of freedom.

Ultrasonic probe

The ultrasonic probe is a sensor for converting an ultrasonic signal into other energy signals (usually electrical signals), the bolt pretightening force can be directly measured in real time by adopting ultrasonic waves, and the specific structure and the measurement principle are the prior art and are not described herein again. The utility model discloses in, ultrasonic probe has made the improvement on current ultrasonic probe basis, sets up the screw thread promptly at its outer wall, but principle, basic structure do not change.

Cavity and screw hole of fixed block

The cavity of the fixing block should limit the rotational freedom of the bolt head so that the bolt head can be fixed during the process of tightening the bolt. The fixed block is used as a single part which can be separated from the base and can be replaced, so that the bolt heads of different models can be matched. It can be understood that the existing ultrasonic probe has different shapes and sizes due to different manufacturers and application fields, and the aperture and the depth of the threaded hole of the fixed block are set according to the selected ultrasonic probe. The cavity is axially through the fixed block threaded hole, preferably centrally aligned.

As a specific embodiment, as shown in fig. 4, the base 11 is provided with a groove 112, the fixing block 12 is disposed in the groove 112, and the through hole 111 is provided on the bottom wall of the groove and penetrates the groove 112.

Preferably, the base 11 and the fixed block 12 are connected by bolts, screws or spring plungers. The fixing block 12 is prevented from falling down in use, and the fixing block 12 is also prevented from rotating when the bolt is tightened. The connection mode of the base 11 and the fixed block 12 is not limited to the above. In this embodiment, the spring plunger 113 is adopted for connection, the side wall of the groove 112 is provided with a mounting hole 1131, the side wall of the fixing block 12 is provided with a pit 123 adapted to the head of the spring plunger, the pit 123 corresponds to the mounting hole 1131, and the spring plunger 113 sequentially passes through the mounting hole 1131 and the pit 123 to fix the fixing block on the base.

Preferably, the slot 112 is provided with a fixed block limiting mechanism that limits the rotational freedom of the fixed block. The fixing block 12 is fitted with a fixing block limit mechanism to limit the rotational degree of freedom of the fixing block 12, thereby fixing the bolt in the process of tightening the bolt. Preferably, the fixing block limiting mechanism comprises a stop plane, the stop plane is arranged on a side wall of the groove, the side wall of the groove is a plane wall, and the fixing block 12 is matched with the groove 112. Preferably, the groove 112 is square. Thus, the degree of freedom of rotation of the fixed block 12 is restricted.

As shown in fig. 6, the corners of the fixing block 12 are provided with arc-shaped chamfers 124. The fixing block 12 is convenient to mount.

As shown in fig. 5 and 6, the corner of the fixed block 12 is provided with an unloading groove 125, and the bottom of the base 11 is provided with a through groove 114 corresponding to the unloading groove 125. When the fixing block 12 is mounted, the unloading groove 125 corresponds to the through groove 114, so that the fixing block 12 is inserted into the through groove 114 by using an in-line wrench, and then the fixing block 12 is tilted out of the base 11 in the insertion unloading groove 125, so that the fixing block 12 can be taken out conveniently. It should be noted that the unloading slot 125 is near the bottom of the fixed block 12.

Preferably, as shown in fig. 3, a pressure ring 14 is disposed above the fixed block 12, and the pressure ring 14 is disposed in the groove 112. In the traditional calibration, one end of a tensile machine is buckled with a bolt head, the other end of the tensile machine is buckled with a nut, the tensile force is directly applied, so that the bolt has an extension deformation, and the time difference between the tensile machine and ultrasonic sound is recorded for calibration; however, this calibration does not allow the bolt to be extended by the actual tightening process, and only the tensile stress is calibrated. However, in the process of screwing the real bolt, the nut is screwed in, and the bolt simultaneously generates twisting and stretching effects under the action of bearing the torque of the wrench. The utility model discloses a set up the pressure ring, survey the pretightning force curve that the pretightning force must screw up the in-process with the pressure ring at the bolt tightening in-process, combine ultrasonic probe synchronous survey bolt elongation simultaneously also can convert into the sound time difference, the pretightning force curve that surveys through the pressure ring is markd with the sound time difference that the supersound obtained and is realized turning round and drawing the mark, so, just can obtain supersound pretightning force mark in the true operating mode, this is markd and more accords with the true stress state of bolt, it is more accurate to mark.

As shown in fig. 5, the slot 112 has an opening 115 in the sidewall thereof, and the terminal 141 of the pressure ring 14 faces the opening 115. The slot 112 is of limited length and the opening 115 is provided so as not to interfere with the installation of the pressure ring 14, and the installation within the slot can also be observed through the opening 115.

Preferably, as shown in fig. 3, a gasket 15 is disposed at the bottom of the pressure ring 14. Since the pressure ring 14 obtains a pressure value by pressing the lower end face thereof, the flatness and hardness requirements of the end face are satisfied by providing the gasket 15. It will be appreciated that the thickness of the spacer 15 is not adjustable since the fixing block 12 is fixed to the base 11. In addition, the gasket 15 should satisfy the requirement of having no rotational freedom, and as a specific embodiment, the gasket 15 and the groove 112 are square bodies matched with each other. It should be noted that the groove 112 of the base 11 can accommodate the pressure ring 14, the gasket 15 and the anchor block 12, at least ensuring that the anchor block 12 is flush with the opening of the groove 112.

Preferably, the base 11 is provided with a connected member limiting mechanism for limiting the degree of freedom of rotation of the connected member. In a real assembly environment, the connected member is required to be in a fixed state, and therefore, when the nut is tightened, the connected member is prevented from rotating by limiting the rotational degree of freedom thereof. Preferably, the connected member limiting mechanism comprises a stop plane. Preferably, the top of the base is provided with a positioning groove 116, the stop plane is a wall of the positioning groove, and the through hole is provided in the positioning groove 116. The positioning groove 116 is used for placing the connected piece 25.

Torsion-pull calibration system

The utility model also provides a calibration system 2 is drawn to the bolt turn round, as shown in fig. 7-9, turn round and draw calibration system and include foretell experimental apparatus and locking piece 21, work platform 22, bolt 23, nut 24, by connecting piece 25, can be fixed with the laboratory bench for what experiment assembly bolt turned round draws the calibration.

The bolt torsion calibration system comprises a bolt 23, a nut 24 and a connected piece 25, wherein the connected piece 25 is provided with a hole 251, and the connected piece 25 is matched with the positioning groove 116, see fig. 9. The shapes of the positioning groove 116 and the connected piece 25 are not limited, and can be rectangle, square, diamond, polygon and the like, so that the degree of freedom of rotation of the connected piece can be limited, and the series connected pieces can be conveniently exchanged according to different bearing surface conditions. It should be noted that the connected member used for simulating the actual contact surface state of the bolt connection is a key element for determining the friction coefficient of the bearing surface, and can be changed at any time according to the test requirements. As a specific example, the positioning groove and the connected piece are both rectangular, the thickness of the connected piece is 4mm, and the minimum length of the required test bolt is 35 mm.

Preferably, as shown in fig. 9, the holes 251 are provided in plural and equally spaced. This is for the convenience of changing the hole site, and a quilt connecting piece can be used for many times of experiments. If the single-plate single hole is adopted, the replacement is troublesome, and the arrangement is inconvenient due to a large quantity.

In order to engage the universal work platform 22 with the force measuring laboratory apparatus, a locking block 21 is provided, as shown in fig. 7. The two sides of the locking block 21 extend to form a baffle 211, and the middle part is provided with a groove 212 for accommodating the tail part of the ultrasonic probe 13. The device is placed on the locking block 21, the terminal of the ultrasonic probe is positioned in the groove 212, the rotation of the device during working is avoided, and the baffle plates 211 on the two sides prevent the device from falling. Preferably, the base 11 is square. Thus, the device can be placed horizontally and vertically.

The working platform 22 belongs to a general equipment platform, as shown in fig. 8. The working platform 22 is provided with a plurality of T-shaped protrusions 221, the T-shaped protrusions 221 are spaced at intervals 222, the T-shaped protrusions 221 are distributed at equal intervals, and the bottom of the locking block 21 is provided with inserting blocks 213 matched with the intervals 222. It should be noted that the height of the insertion block 213 does not affect the movement of the locking block 21, so the height of the insertion block 213 is less than the height of the T-shaped protrusion 221. The bottom plane of the locking piece 21 is attached to the plane of the T-shaped protrusion, and the plane of the T-shaped protrusion 221 covers the bottom plane of the locking piece. The system is fixed with the experiment table and used for torsion and pull calibration of the bolt.

The assembly process of the system is as follows: firstly assembling the device: the ultrasonic probe 13 is screwed into the fixed block 12, so that the end part of the probe extends out of the cavity 121, the bolt head is placed in the cavity 121, the end part of the probe is in contact with the bolt head, the rod part of the bolt sequentially penetrates through the pressure ring 14, the gasket 15, the base 11 and the connected piece 25, the bolt head is tightly attached to the end part of the probe through the locking nut, and the device is assembled. Reassembling the system: the locking piece 21 is placed in the space 222 of the working platform 22, and the assembled device is placed in the locking piece 21, either horizontally or vertically, as shown in fig. 9.

Actual measurement installation tool

The utility model also provides an actual measurement installation tool 3, as shown in fig. 10-32, this tool simple structure, it is small, easily carry, can be used to the on-the-spot assembly entity, measure actual assembly bolt's pretightning force.

Specifically, the actual measurement mounting jig 3 includes a holder 301, a mounting block 302 and an ultrasonic probe 303, the mounting block 302 is provided with a mounting block threaded hole 3021 which is axially through, the ultrasonic probe 303 is in threaded connection with the mounting block 302, the holder 301 is provided with a clamping portion for mounting the head or the rod of the bolt 4, and when the mounting block 302 is mounted on the holder 301, the clamping portion enables the mounting block threaded hole 3021 and the head or the rod to be located on the same axis. The structural improvement of the ultrasonic probe is as described above, and will not be described in detail herein. By providing a screw on the outer wall of the ultrasonic probe, the ultrasonic probe 303 is screwed to the mounting block 302, thereby securing the fixation of the ultrasonic probe 303.

Clamping part

The form of the clamping portion is various.

The first method comprises the following steps: as shown in fig. 10-13, the clamping portion comprises two movably connected clamping plates 3011, which are connected at their upper ends by a resilient member 300 and at their lower ends have a clamping surface 30114 for clamping the head of the bolt. The mounting block 302 is fixed on the clamp plate 3011, the ultrasonic probe 303 is screwed into the mounting block 302, the end of the ultrasonic probe 303 extends into the mounting block threaded hole 3021, and the clamping surface 30114 exerts a clamping force under the action of the elastic element 300 to clamp the head of the bolt and make the end of the probe and the head of the bolt tightly fit. When the ultrasonic probe is installed, the terminal of the ultrasonic probe does not interfere with the elastic element. It should be noted that when the head of the bolt is clamped, the resilient member 300 is in a compressed state, so that a clamping force can be applied to the bolt. Because the clamping surface is fixed, the jig in the form is more suitable for clamping hexagonal-head and dodecagonal-head bolts.

As shown in fig. 11, two splints 3011 are movably connected by pins 3019. Of course, the form of the movable connection of the two splints 3011 is not limited to the connection of the pins 3019.

As shown in fig. 12, fixing holes 3022 are formed on the side of the mounting block 302, and a pin 3019 fixes the clamp plate 3011 to the mounting block 302 through the fixing holes 3022. The pin 3019 extends into the fixing hole 3022 to fix the splint 3011 to the mounting block 302, which facilitates installation.

As shown in fig. 13, the two clamp plates 3011 have the same structure, the clamp plate 3011 includes an elastic element fixing section 30111, a movable connecting section 30112 and a clamping section 30113, which are connected in sequence, two ends of the elastic element 300 are respectively fixed with the elastic element fixing sections 30111 of the two clamp plates, fixing plates 30115 extend vertically on two sides of the movable connecting section 30112, the fixing plates 30115 of the two clamp plates are connected by pins 3019, the clamping section 30113 is provided with a clamping surface 30114, and the clamping surface 30114 is a plane capable of being attached to the head of the bolt.

As shown in fig. 10, the clamping face 30114 covers the side of the head of the hex bolt. The clamping surface is large in area attached to the head of the hexagonal bolt, and clamping is more stable.

As shown in fig. 10, the elastic member is a spring. Forms of the elastic element include, but are not limited to: leaf springs, bellows, pressure spring tubes, etc.

As shown in FIG. 11, a sponge 304 is provided below the mounting block 302, the sponge having perforations. Since the plane of the clamping plate 3011 for clamping the bolt is fixed, for bolts of different types, only line contact can be performed due to different rotation angles, and in addition, since the mounting block only has one line support, the bolt head is not necessarily perpendicular to the bolt head when clamped, and the ultrasonic probe is ensured to be fixed by the bonding sponge 304. Due to the different thicknesses and the large difference of the heads of the different bolts, the sponge 304 needs to be deformed by more than 5 MM, but not too long, otherwise the sponge 304 is twisted and possibly pressed against the probe.

Preferably, the mounting block is cylindrical or square in shape. When the square body is formed, the clamping plate is in surface contact with the mounting block, and the clamping plate can clamp the mounting block more stably. In this embodiment, the mounting block is a cylinder, as shown in fig. 12. Preferably, the area of the bottom of the mounting block is no greater than the area of the head of the bolt, so that it is ensured that the clamping plate clamps the bolt.

The installation process of this form tool: the ultrasonic probe 303 is screwed into the mounting block 302, a pin 3019 is inserted to fix the two clamping plates 3011 to the mounting block 302, a sponge 304 is bonded to the bottom of the mounting block 302, and finally the head of the bolt is clamped by the clamping surfaces 30114 of the clamping plates 3011.

And the second method comprises the following steps: as shown in fig. 14 to 19, the clamping portion includes a clamping block 305 and a tightening slot 3012, the mounting block 302 is provided with a clamping slot 3023, the clamping block 305 has a fixing portion 3051 matched with the clamping slot 3023 and a clamping portion 3052 for clamping the head of the bolt, the tightening slot 3012 is provided on the clamping base 301, and the fixing portion 3051 is located in the tightening slot 3012.

Specifically, as shown in fig. 17, the fixing portion 3051 and the clamping portion 3052 are fixed to each other, and the contact surface of the clamping portion 3052 is a flat surface that can contact the head of the bolt. Preferably, the clamping portion length covers the height of the bolt head. Thus, the bolt can be stably clamped.

As shown in fig. 18, the card slot 3023 includes a transverse slot 3024 and a vertical slot 3025, the transverse slot 3024 is formed along the circumferential direction of the side wall of the mounting block 302, the vertical slot 3025 is formed along the longitudinal direction of the side wall of the mounting block 302, and the vertical slot 3025 is communicated with the transverse slot 3024. Preferably, the slot 3023 is T-shaped, and the fixing portion 3051 is T-shaped to fit with the slot. Preferably, the lateral groove is an annular groove, so that it suffices regardless of how long the portion of the fixing portion fitted with the lateral groove.

Preferably, as shown in fig. 19, a slot 3010 is formed in the bottom wall of the tightening slot 3012, the slot 3010 is through the tightening slot 3012, the mounting block 302 includes a thin shaft 3026 and a thick shaft 3027, the thin shaft 3026 is screwed with the slot 3010, and the thick shaft 3027 is in clearance fit with the tightening slot 3012. The clamping blocks clamp the bolt by tightening the clamping base 301.

Preferably, as shown in fig. 18 and 19, the thick shaft 3027 has a circular truncated cone shape with a small top and a large bottom, and the tightening groove 3012 is fitted to the thick shaft 3027. By the clamping with a certain inclination, the clamping of the bolt is ensured.

As shown in fig. 15, the holder head is a tightening portion 3013. The bolt can be conveniently screwed by the spanner. Preferably, the tightening part 3013 is a plane symmetrically arranged along the axis of the holder. As a specific example, the tightening part has a regular hexagonal shape. The shape of the head of the holder is not limited to a hexagonal bolt, and may be any other shape that facilitates the tightening of a bolt with a wrench.

The assembly process of this tool: screwing the ultrasonic probe 303 into the mounting block 302 to ensure that the end of the probe extends out of the threaded hole 3021 of the mounting block, placing the clamping block 305 into the clamping groove 3023, sleeving the clamping seat 301 on the outer portion of the mounting block 302, placing the whole jig on the head of the bolt, slightly screwing the clamping seat 302 to enable the clamping block to clamp the head of the bolt, and then screwing the bolt with a wrench.

And the third is that: as shown in fig. 20-32, the clamping portion is a cavity 306 disposed on the clamping base 301, the clamping base 301 is provided with a shaft hole 3014 for mounting the mounting block 302, the shaft hole 3014 is axially through the cavity 306, and the mounting block 302 is in clearance fit with the shaft hole 3014. During installation, the installation block 302 is placed in the shaft hole 3014, the external part of the ultrasonic probe 13 is provided with threads, the ultrasonic probe 13 is screwed into the installation block 302 to ensure that the end part of the probe extends out of the cavity 306, and then the head part or the rod part of the bolt is placed in the cavity 306, so that the end part of the probe is tightly attached to the head part or the rod part of the bolt. The cavity is in the shape of the head of the adapting bolt or a threaded hole matched with the thread of the rod part. When the cavity is in the shape of the head of the bolt, the head of the bolt is in the shape capable of being limited to rotate by the cavity, such as a hexagonal head, a D-shaped head and the like, so that the bolt is fixed in the process of screwing the bolt by limiting the rotation freedom degree of the head of the bolt in the cavity. In addition, the adaptation of different model bolts is realized to the accessible change grip slipper.

Preferably, as shown in fig. 22, the mounting block 302 is fixed to the holder 301. Here, "fixed" means that the mounting block 302 is immovably located at a specific position and is stationary relative to the holder 301. On one hand, because the mounting block 302 is in clearance fit with the shaft hole 3014, the mounting block 302 still has translational freedom, and the mounting block 302 is fixed on the clamping seat 301, so that the translational freedom of the mounting block 302 can be limited, and the bolt pretightening force can be accurately monitored. On the other hand, the mounting block can not fall off when the jig is turned over.

Preferably, the mounting block 302 and the clamping seat 301 are fixed by bolts, screws or spring plunger bolts. The fixing manner of the mounting block and the clamping seat is not limited to the above list. In this embodiment, a spring plunger is used for connection, a mounting hole 3015 is formed in the side portion of the clamping base 301, a recess 3028 adapted to the spring plunger head is formed in the side wall of the mounting block 302, the recess 3028 corresponds to the mounting hole 3015, as shown in fig. 24-25, the spring plunger sequentially passes through the mounting hole 3015 and the recess 3028, and the mounting block 302 is fixed on the clamping base 301. Preferably, the spring plunger connections are arranged in two sets axially symmetrically along the grip holder 301. Securing and stabilizing the connection between the ultrasonic mounting block 302 and the holder 301.

Preferably, as shown in fig. 25, the mounting block head has a flange 3029. The mounting block is convenient to take out.

Preferably, as shown in fig. 24, the shaft hole 3014 is a stepped hole and includes a coarse hole 30141 and a fine hole 30142, the coarse hole 30141 is located on the upper side, the fine hole 30142 is located on the lower side, and the coarse hole 30141 is in clearance fit with the mounting block 302. The perforations 30142 are of a length to allow the probe tip to protrude.

Preferably, the wide hole 30141 is a kidney-shaped hole, and the mounting block 302 is shaped to fit the wide hole. To limit the rotational freedom of the mounting block 302.

Preferably, as shown in fig. 20, the holder 301 is provided with a cut-out plane 3017, and the cut-out plane 3017 is axially symmetrically arranged along the holder 301. The cut-out surface 3017 is configured to allow a wrench to engage the cut-out surface 3017 to facilitate twisting of the holder 301.

Preferably, as shown in fig. 28-31, the jig is provided with a gland 307, and the gland 307 has a pressing portion 3071 contacting the holder 301. When the bolt is locked, the pressing cover needs to be pressed by hands to ensure that the ultrasonic probe is always contacted with the head of the bolt, so that the operation is simple and the reliability is high.

Preferably, as shown in fig. 30, the bottom of the pressing cover 307 is provided with a pressing groove 3070, the lower pressing part is a pressing groove surface 3071, the top is provided with a terminal protruding hole 3072, the terminal protruding hole 3072 is axially communicated with the pressing groove 3070, the pressing groove 3070 is in clearance fit with the clamping seat, and the aperture of the terminal protruding hole is smaller than the groove diameter of the pressing groove 3070. The terminal extending hole is used for enabling the terminal of the ultrasonic probe to extend outwards.

Preferably, the gland 307 is attached to the holder. Thus, the loss of the gland is prevented.

Preferably, the gland 307 is rotatably mounted to the holder. I.e., the gland 307 is rotatable about the holder so that the gland can be quickly attached to the holder regardless of placement.

Preferably, as shown in fig. 31, the side of the holder 301 is circumferentially provided with an annular groove 3016, the gland 307 is provided with a connecting hole 3073, and the gland is connected with the holder by a retaining screw 3074. Although the connection between the pressing cover 307 and the holder 301 is provided in a rotatable manner, a mounting manner that restricts the rotational degree of freedom of the pressing cover 307 is still applicable, for example, the side of the holder 301 is provided with only a hole and is fixed to the pressing cover 307 by a bolt.

Preferably, as shown in fig. 31, a flat bearing 308 is provided between the gland 307 and the holder 301. The flat bearing 308 is used in the assembly to carry axial loads.

Preferably, the width of the annular groove 3016 is larger than the diameter of the connecting hole 3073. Thus, the gland 307 has a space to move up and down, thereby reserving an assembly space of the flat bearing 308. Moreover, when the gland 307 is installed, the connecting hole 3073 does not need to be accurately aligned with the annular groove, and the installation is more convenient and quicker.

The assembly process of this tool: the mounting block 302 is placed in the shaft hole 3014, the clamping seat 301 and the mounting block 302 are fixed by a spring plunger, the ultrasonic probe 303 is screwed into the mounting block 302 to ensure that the end of the probe extends out of the cavity 306, the gland 307 is pressed on the clamping seat 301, a flat bearing is placed between the gland 307 and the clamping seat 301 as required, the gland 307 is mounted on the clamping seat 301 by a clamping screw, and then the head or the rod of the bolt is placed in the cavity 306.

Two specific field assembly embodiments will now be described. The first is that the cavity is the shape that is applicable to the bolt head, and the connecting piece is the ring flange bucket, twists the bolt into the ring flange bucket, and the tool card that will assemble is gone into the bolt head to push down the gland, through the vertical direction pressure of plane bearing transmission, guarantee ultrasonic probe and bolt in close contact with, use the opening wrench, the card is gone into the tool and is cut the plane, and rotating the wrench, the base is rotatory thereupon, screws up when motionless locking bolt promptly, see fig. 27. The second is that the cavity is a threaded hole suitable for the rod part of the bolt, the connecting piece is a flange barrel, the bolt is installed and penetrates the flange barrel, the nut is screwed in, then the jig is screwed in the rod part of the bolt, the probe is confirmed to be in contact with the bolt, and finally the nut is screwed by using an open spanner, see fig. 32.

Torsion-tension calibration method

On the other hand, the utility model also provides a turning round of bolt draws calibration method turns round through combining the bolt and draws calibration system and actual measurement installation tool to obtain actual assembly bolt's pretightning force.

The torsion and pull calibration method of the bolt comprises the following steps:

the method comprises the following steps: calibrating a corresponding relation between the ultrasonic signal propagation time increment of the bolt to be tested and the pre-tightening force in the bolt tightening through a bolt twisting and pulling calibration system to obtain a calibration curve of the ultrasonic sound time difference and the real pre-tightening force of the bolt;

step two: measuring ultrasonic signal propagation time increment data of an actual assembly bolt in actual assembly by using an actual measurement and installation jig;

step three: and comparing the ultrasonic signal propagation time increment data of the actual assembling bolt measured in the step two with the calibration curve in the step one to obtain the pretightening force of the actual assembling bolt.

The utility model shown and described herein may be implemented in the absence of any element, limitation, or limitations specifically disclosed herein. The terms and expressions which have been employed are used as terms of description and not of limitation, and there is no intention in the use of such terms and expressions of excluding any equivalents of the features shown and described or portions thereof, and it is recognized that various modifications are possible within the scope of the invention. It should therefore be understood that although the present invention has been specifically disclosed by various embodiments and optional features, modification and variation of the concepts herein described may be resorted to by those skilled in the art, and that such modifications and variations are considered to be within the scope of this invention as defined by the appended claims.

The contents of the articles, patents, patent applications, and all other documents and electronically available information described or cited herein are hereby incorporated by reference in their entirety to the same extent as if each individual publication was specifically and individually indicated to be incorporated by reference. Applicants reserve the right to incorporate into this application any and all materials and information from any such articles, patents, patent applications, or other documents.

Claims (9)

1. The utility model provides a portable ultrasonic probe installation tool, its characterized in that includes grip slipper, ultrasonic transducer, installation piece and clamp splice, and the installation piece is opened has the installation piece screw hole that the axial is link up, and ultrasonic transducer and installation piece threaded connection, installation piece are equipped with the draw-in groove, and the clamp splice has with draw-in groove complex fixed part and the clamping part that is used for the clamping bolt head, and the grip slipper is equipped with screws up the groove, and the fixed part is arranged in screwing up the groove.

2. The portable ultrasonic probe mounting jig of claim 1, wherein the clamping groove comprises a transverse groove and a vertical groove, the transverse groove is formed along the circumferential direction of the side wall of the mounting block, the vertical groove is formed along the longitudinal direction of the side wall of the mounting block, and the vertical groove is communicated with the transverse groove.

3. The portable ultrasonic probe mounting jig of claim 2, wherein the slot is T-shaped.

4. The portable ultrasonic probe mounting jig of claim 1, wherein the fixing portion is fixed with a clamping portion having a flat surface capable of being fitted with a head of a bolt.

5. The portable ultrasonic probe mounting jig of claim 1, wherein the bottom wall of the tightening groove is provided with a slot hole, the slot hole is communicated with the tightening groove, the mounting block comprises a thin shaft and a thick shaft, the thin shaft is in threaded fit with the slot hole, and the thick shaft is in clearance fit with the tightening groove.

6. The portable ultrasonic probe mounting jig of claim 5, wherein the thick shaft is in a truncated cone shape with a small upper part and a large lower part, and the tightening groove is matched with the thick shaft.

7. The portable ultrasonic probe mounting jig of claim 1, wherein the holder head is a tightening portion.

8. The portable ultrasonic probe mounting jig of claim 7, wherein the tightening part is a plane symmetrically disposed along the axis of the holder.

9. The portable ultrasonic probe mounting jig of claim 8, wherein the tightening part is in a regular hexagonal shape.

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