CN210830898U

CN210830898U - Anti-sliding tool for flange connecting surface

Info

Publication number: CN210830898U
Application number: CN201921737485.7U
Authority: CN
Inventors: 李爱平; 江华; 张贺; 徐伟; 韩鲁明
Original assignee: Shanghai Zhidi Machinery Equipment Co ltd
Current assignee: Shanghai Zhidi Machinery Equipment Co ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-06-23
Anticipated expiration: 2029-10-16

Abstract

The utility model relates to an anti-sliding tool for flange joint face, a through-diameter expansion sleeve and a limiting expansion sleeve are respectively inserted into the through holes of two connected flanges, a shaft shoulder with the limiting expansion sleeve is in limiting connection with the rear end face of the through hole of one flange, a spacer ring is sleeved on a left end shaft with a taper pin shaft, the spacer ring on the left end shaft is tightly propped against the rear end face of the unthreaded hole of the flange by a fastener, a jacking ring is screwed on a right end shaft, the front end face of the jacking ring is tightly propped against the rear end face of the through-diameter expansion sleeve, the rear end of the jacking ring is provided with the spacer ring, a plurality of adjusting gaskets are arranged between the front end face of the spacer ring and the rear end face of the unthreaded hole of the other flange, the spacer ring is tightly propped against the rear end face of the through the adjusting gasket by the fastener on the right end shaft, the taper pin shaft can generate axial tension and displacement by adjusting the fastener, and the through-diameter expansion sleeve and the limiting expansion sleeve are circumferentially connected with the two expansion sleeves by, and screwing the left fastener and the right fastener to realize the connection and the clinging of the two flanges.

Description

Anti-sliding tool for flange connecting surface

Technical Field

The utility model relates to a flange joint frock, especially an anti-skidding frock that is used for flange joint face.

Background

A common flange connection is to align the two flange faces with the unthreaded holes, as shown in fig. 1, and then tightly join the two flanges by pre-tightening bolts (studs), the tight joint being used for sealing, connection, force transmission, torque, etc.

Generally, holes are formed in the periphery of the flange plate, and bolts are passed through the holes; for convenient installation, the inner diameter of the hole is generally 0.5-2mm larger than the outer diameter of the screw (depending on the size of the hole diameter, the larger the diameter of the screw is, the larger the difference between the inner diameter and the outer diameter of the hole is); the friction force generated between the two contact surfaces by the pretightening of the bolt group is used for force transmission, and the connection is of a friction type. A friction type connection; for the conditions that high-frequency vibration or large deformation exists between the two flange plates, or the contact surfaces are locally broken due to pressure, embedding, microscopic diffusion and the like in the long-term use process, the friction coefficient between the contact surfaces of the two flanges is changed, further the friction force is reduced, and the friction force between the contact surfaces is not enough to transfer the system torque any more, so that the connection failure is caused. Great hidden danger is brought to the safe operation of the system.

Generally, holes are formed in the periphery of the flange plate, and bolts are passed through the holes; the hole is a reamed hole, and the inner diameter of the hole is close to the inner diameter of the bolt; after the installation is finished, the bolt is tightly attached to the inner wall of the flange hole; when the torque is transmitted, the torque is transmitted by means of shearing force of the bolt and the inner wall of the flange hole, and the connection is in a shearing type. Shearing type connection; the moment of torsion relies on the transmission of shearing screw, though avoided the danger because of the connection inefficacy that contact surface coefficient of friction changes the production, nevertheless because ream hole and bolt external diameter size are unanimous, lead to the installation very difficult, the bolt often needs the copper hammer to squeeze into, and the installation just appears the installation improper easily when on-the-spot installation, even will on-the-spot ream hole. The installation efficiency is extremely low, and the installation is not frequently used in engineering practice unless special designs and tools are used.

Disclosure of Invention

The utility model aims at providing an anti-skidding frock for flange joint face, this anti-skidding frock has traditional friction type concurrently and connects the convenient characteristics of installation, has traditional shearing type again concurrently and connects the direct shear force transmission friction that leans on, does not receive the characteristics of friction surface state influence.

In order to achieve the above purpose, the technical scheme of the utility model is that: an anti-sliding tool for flange connection surface comprises a tapered pin shaft, a through-diameter expansion sleeve, a limiting expansion sleeve and a jacking ring, wherein the through-holes of two connected flanges are respectively inserted into the through-diameter expansion sleeve and the limiting expansion sleeve, a shaft shoulder with the limiting expansion sleeve is in limiting connection with the rear end surface of the through-hole of one flange, a left end shaft with the tapered pin shaft is sleeved with a spacer ring, the spacer ring on the left end shaft is tightly jacked on the rear end surface of a unthreaded hole of the flange by a fastener, the jacking ring is screwed on a right end shaft, the front end surface of the jacking ring is tightly jacked on the rear end surface of the through-diameter expansion sleeve, the rear end of the jacking ring is provided with the spacer ring sleeved on the right end shaft, a plurality of adjusting gaskets are arranged between the front end surface of the spacer ring and the rear end surface of the unthreaded hole of the other flange, the spacer ring is tightly jacked on the spacer ring by the fastener screwed on the right end shaft, the spacer ring is tightly jacked on the rear end surface of the through adjusting gaskets, and the diameter expanding sleeve and the expansion sleeve with the limit are circumferentially connected with the two expansion parts through the conical surfaces, and the left fastener and the right fastener are screwed, so that the two flanges are connected and tightly attached.

Furthermore, the pin shaft with the taper is a slender rod with the taper at the middle section, the two ends of the pin shaft are threaded double-end screws, and the threads and the middle section are in transition connection through arcs.

Furthermore, the taper of the middle section of the tapered pin shaft is 1: 20-1: 70.

Further, the pin shaft with the taper is of a bolt structure or a bolt and screw structure, and both ends of the pin shaft with the taper of the bolt structure are blind hole threaded holes; and one end of the bolt and screw rod structure with the taper pin shaft is a screw rod, and the other end of the bolt and screw rod structure is a blind hole threaded hole.

Further, the latus rectum cover that expands and take spacing cover that expands are the sleeve structure of interior awl of excircle, adopt cast copper material, and the excircle is the face of cylinder, and the interior circle is the awl face of cylinder, and four grooves are opened altogether to the circumferencial direction to 90 degrees equipartitions, two liang of alternately, and latus rectum cover that expands and take spacing cover inner wall tapering all the same with the external taper of taking the tapering round pin axle.

Furthermore, two grooves of the four grooves on the drift diameter expansion sleeve and the expansion sleeve with the limit position extend from the left end to the bottom of the right end and are not communicated with the bottom of the right end, so that the bottom of the right end is kept continuous and complete; the other two grooves at intervals of 90 degrees extend to the bottom of the left end from the right end and are not communicated with the bottom of the left end, so that the bottom of the left end is continuous and complete; the external diameters of the drift diameter expansion sleeve and the expansion sleeve with the limiting function have elasticity, and the installation and the sequential gradual stress application are facilitated.

Further, the drift diameter expansion sleeve and the expansion sleeve with the limit are made of one of aluminum bronze alloy, tin bronze, beryllium bronze, aluminum alloy and stainless steel.

Further, the isolating ring is circular or polygonal.

The utility model has the advantages that:

the utility model discloses a "round pin axle-cover" combination fastening structure that expands has contained tapered pin axle (stud, screw rod) and the cover that rises, thereby adopts the round pin axle to bear the anti structure that slides of shear force, through certain axial pretightning force, lets closely laminate between taper pin, the cover that rises and the outer hole, lets the round pin axle bear the purpose of the shearing force that causes because the trend of sliding between the two flange faces. The expansion sleeve is stressed and expanded to fill the gap, and torque is transmitted through shearing force, so that torque transmission of the whole structure is realized (the torque transmission mode is changed from friction surface transmission into transmission by virtue of a pin shaft or transmission by virtue of combination of the friction surface and the pin shaft shearing), and no relative sliding exists between the two flange surfaces. Meanwhile, the expansion sleeve has the function of adjusting the outer diameter and is convenient to install.

Different with traditional flange joint mode, the utility model discloses a frock has further ensured the vice safety of connection on the basis of traditional connection, is particularly useful for two flange faces and has because of relative slip and then destroy flange joint's engineering actual case. The slippage can be macroscopic slippage, and can also be microscopic dislocation which damages the flange joint surface due to the relative movement trend and the relative deformation trend generated by the external force on one side or two sides of the flange.

The utility model discloses an antiskid frock simple structure, the cost is lower, and the installation is rapid, uses few economic cost to improve greatly and connects vice factor of safety, ensures system safety.

Drawings

FIG. 1 is a schematic view of a conventional flange structure;

fig. 2 is a schematic view of the overall structure of the anti-sliding tool for flange joint surfaces of the present invention;

FIG. 3 is a schematic view of a tapered pin structure;

FIG. 4 is a schematic structural view of a latus rectum expansion sleeve;

FIG. 5 is a schematic view of an expansion sleeve with a limit;

fig. 6-13 are flow charts of installation processes using anti-sliding tooling for flange joint faces.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 2 to 5, the utility model discloses an anti-sliding frock for flange joint face, including taking tapering round pin axle 1, latus rectum to expand set 2, taking spacing expansion sleeve 3, pushing ring 4, spacer ring 5, adjusting shim A6, adjusting shim B7, collar 8, left and right standard nut 9, 10, standard gasket etc..

After the flange I20 is in contact connection with the flange II 21 on the structural surface A, the flange I20 is aligned with a unthreaded hole in the flange II 21, a tapered pin shaft 1 is inserted into the unthreaded holes of the flange I20 and the flange II 21, a drift diameter expansion sleeve 2 and a limiting expansion sleeve 3 are in matched sleeve connection on the taper of the tapered pin shaft 1, the outer cylinders of the drift diameter expansion sleeve 2 and the limiting expansion sleeve 3 are respectively in contact connection with the unthreaded hole walls of the flange II 21 and the flange I20, a shaft shoulder with the limiting expansion sleeve 3 is in limiting connection with the unthreaded hole rear end surface of the flange I20, a left threaded shaft and a right threaded shaft are respectively arranged at two ends of the tapered pin shaft 1, a spacer ring 5 is sleeved on the left threaded shaft, the spacer ring 5 at the end is tightly pressed on the unthreaded hole rear end surface of the flange I20 by using a left standard nut 9 and a standard gasket, a jacking ring 4 is screwed on the right threaded shaft, the front end surface of the jacking ring 4 is tightly pressed on the rear end surface of the drift diameter sleeve 2, a spacer ring 5 sleeved on the right threaded shaft, an adjusting gasket A6 and an adjusting gasket B7 are arranged between the front end face of the isolating ring 5 and the back end face of the unthreaded hole of the flange II 21, the isolating ring 5 is tightly propped against the isolating ring 5 by a right standard nut 10 and a standard gasket which are screwed on a right threaded shaft, the isolating ring 5 is tightly propped against the back end face of the unthreaded hole of the flange II 21 by the adjusting gasket A6 and the adjusting gasket B7, the pin shaft 1 with the taper can generate axial tension and displacement by adjusting the left and right standard nuts 9 and 10, and the through-diameter expanding sleeve 2 and the expanding sleeve 3 with the limit are circumferentially connected with the flange I20 and the flange II 21 in an expanding manner through conical surfaces. The two ends of the pin shaft 1 with the taper are screwed with nuts to realize the connection and the close attachment of the two flanges.

The utility model discloses an anti-skidding frock for flange joint face is served and is relied on the nut at stud both ends to compress tightly the contact surface of two flanges with flange one 20 and flange two 21, produces frictional force between the contact surface to make flange one 20 and flange two 21 produce the stable connection, and then carry out the transmission of power and moment of torsion.

In particular, in the present invention, in order to prevent the torque from being transmitted through the contact surface (friction surface), and then causing the damage of the friction surface, thereby causing the friction force to be reduced, the provided friction force can no longer provide sufficient transmission for the force and the torque. Loading the two flanges from two sides with a diameter expanding sleeve 2 and a limiting expanding sleeve 3 respectively, and finally tightly matching the outer circular surface with the inner wall of the hole; the pin shaft 1 with the taper is installed from the left side, an axial force is formed by pre-tightening the nut, and the middle outer conical surface is finally tightly attached to the inner hole walls of the two expansion sleeves. Take spacing expansion sleeve 3 and flange one to closely laminate to because the axial tension that the bolt was screwed up and is produced, act on the inclined plane, form circumference bloated tight power.

As shown in fig. 3, the pin shaft 1 with taper is a slender rod with taper in the middle section, and two threaded double-head screws are arranged at two ends; structurally viewed as a double-ended stud/rod with a taper in the middle. The transition sections of the thread and the conical section are inverted arcs, so that the problems that the transition between the thread and the polish rod is not smooth or not ideal during processing and stress concentration is generated when the screw is stressed are avoided. In the design, a crossed groove is formed in the middle-area limiting expansion sleeve 3, the inner side of the crossed groove is a tapered hole, after the left shaft is positioned on the end face of the hole, the tapered pin shaft 1 with the taper is inserted from the left side, the right side of the tapered pin shaft is pre-tightened by a right nut to form axial tension, the tapered surface in the middle section of the tapered pin shaft 1 is in contact with the inner tapered surface of the limiting expansion sleeve 3, when a gap exists between the outer circumferential surface of the limiting expansion sleeve 3 with the taper and the inner hole of the flange plate, the groove part of the limiting expansion sleeve 3 with the taper can deform and expand under the action of the axial force.

As shown in fig. 4, the diameter expanding sleeve 2 is of a sleeve structure, and is provided with a cross groove, the inner side of the sleeve is a tapered hole, when the right side is extruded leftwards by the sleeve, the diameter expanding sleeve 2 moves leftwards, the inner conical surface of the diameter expanding sleeve is contacted with the tapered surface at the middle section of the tapered pin shaft 1, when a gap exists between the outer circumferential surface of the diameter expanding sleeve 2 and the inner hole of the flange plate, the groove part of the diameter expanding sleeve 2 deforms and expands under the action of axial force, and finally the diameter expanding sleeve is tightly attached to the inner circle of the hole.

When the drift diameter expansion sleeve 2 and the expansion sleeve 3 with the limit are tightly attached to the tapered pin shaft and the flange inner hole, the torque between the flanges is transmitted through the tapered pin shaft 1 (stud/screw), the potential possibility of transmission through the flange contact surface is eliminated, and the sliding risk is further eliminated.

As shown in fig. 5, the expansion sleeve 3 with a limit is of a sleeve structure, and the expansion sleeve 3 with a limit is provided with a shaft shoulder which is used for axial stopping and positioning the whole fastening system.

As shown in fig. 4 and 5, the drift diameter expansion sleeve 2 and the expansion sleeve with a limit 3 are both sleeve structures with outer circles and inner cones; the copper casting material is adopted, the outer circle is a cylindrical surface, the inner circle is a conical cylindrical surface, 4 grooves are formed in the circumferential direction, the grooves are uniformly distributed at 90 degrees, and every two grooves are crossed. The conicity of the inner wall of the expansion sleeve is the same as that of the pin shaft 1 with the conicity, when the system is tensioned, the inner wall of the expansion sleeve is tightly attached to the pin shaft 1 with the conicity, and certain pressure is kept according to the pretightening force of the system; the outer wall of the expansion sleeve is a cylindrical surface, when the system is tensioned, the outer wall of the expansion sleeve is respectively tightly attached to the inner hole of the first flange and the inner hole of the second flange, and certain pressure is kept between contact surfaces.

The slotting direction of the expansion sleeve is as follows: two deep grooves are formed from the left side, but the deep grooves are not formed to the bottom of the right end, and the right end is kept continuous and complete; similarly, two deep grooves are formed on the right side at intervals of 90 degrees, but the deep grooves are not formed at the bottom of the left end, and the left end is continuous and complete. The outer diameter of the whole expansion sleeve has certain size elasticity, so that the installation is facilitated, and the sequential gradual stress application is facilitated; meanwhile, the left side and the right side are provided with the grooves at intervals instead of the four grooves which are arranged on the same side, so that the deformation in the circumferential directions of the left side and the right side is uniform, and the phenomenon that one sections of the left end and the right end are stressed greatly and the stress of one end is small due to the fact that the four grooves are arranged on the same side is avoided.

The drift diameter expansion sleeve 2 and the expansion sleeve with limit 3 are made of aluminum bronze alloy materials; the material can also be tin bronze, beryllium bronze, aluminum alloy, stainless steel, steel materials and the like, and has certain plasticity and can transmit force and torque.

The pin shaft 1 with the taper is of a screw rod structure, nuts at two ends of the pin shaft are screwed, and a bolt structure can be adopted, and a bolt is screwed on one side of the pin shaft; also can be screw rod structure, and one end is the blind hole screw hole, and the other end nut is screwed up. The taper of the screw of the tapered pin shaft 1 is 1: 20-1: 70. In the structure with the tapered pin shaft 1 subjected to shearing force and anti-sliding, in the installation process, the length shown in fig. 6-13 is the theoretical ideal length or the recommended length which is convenient to select for description, and the moving distance of each step in actual operation can be adjusted according to the actual field condition.

The isolation ring 5 can be circular, square, polygonal and other structures which can play a role in supporting and isolating at will.

The utility model discloses an anti-skidding frock installation step for flange joint face:

the first step is as follows: installing a belt limiting expansion sleeve 3:

inserting the expansion sleeve 3 with the limit into the unthreaded hole of the first flange from the left side, and using a hammer to assist knocking as shown in figure 6;

the second step is that: installing a menstrual flow expansion sleeve 2:

the menstrual expansion sleeve 2 is inserted into the unthreaded hole of the flange II from the right side, as shown in fig. 7, the insertion depth is deep, (the proper distance is reserved on the outer side, and the example is 60 mm), and a plastic hammer can be used for assisting in knocking;

the third step: the position of the pin shaft 1 with taper is arranged and the expansion sleeve 2 for clearing the channels is adjusted

Inserting the tapered pin shaft 1 into a hole from the left side, simultaneously installing the isolating ring 5, a left nut and a standard gasket, reserving a proper distance (assumed to be 65mm) at the end of the left nut as shown in fig. 8, screwing in the right-side end nut, pressing the menstrual flow expansion sleeve 2 to a position with a flush end surface, then installing the installing ring 8, and continuously screwing in the right nut by 10mm as shown in fig. 9;

the fourth step: continuously screwing in the right nut until the menstrual flow expansion sleeve 2 and the tapered pin shaft 1 are completely attached tightly, then screwing out the left nut by 5mm, and screwing in the right nut by 10mm, as shown in figure 9; repeating step 1, as shown in fig. 10 to 13; the maximum precession torque does not exceed the specified torque value, and if no precession is found midway, the repeating step is terminated.

The fifth step: final pre-tightening tapered pin shaft 1

The mounting ring 8 is detached, the adjusting gaskets A6, the adjusting gaskets B7 and the isolating ring 5 are replaced on the right side, and the number of the adjusting gaskets A6 and the adjusting gaskets B7 can be adjusted. Finally, the whole system is screwed down, and all fastening and mounting processes are completed.

Claims

1. The utility model provides an anti-skidding frock for flange joint face, includes that take tapering round pin axle, latus rectum expand the cover, take spacing expand the cover, the ring is advanced in the top, its characterized in that: the through holes of two connected flanges are respectively inserted into a through-diameter expansion sleeve and a limiting expansion sleeve, a shaft shoulder with the limiting expansion sleeve is in limiting connection with the rear end face of the through hole of one flange, a left end shaft with a taper pin shaft is sleeved with a spacer ring, the spacer ring on the left end shaft is tightly pressed against the rear end face of a smooth hole of the flange by a fastener, a right end shaft is screwed with a jacking ring, the front end face of the jacking ring is tightly pressed against the rear end face of the through-diameter expansion sleeve, the rear end of the jacking ring is provided with a spacer ring sleeved on a right end shaft, a plurality of adjusting gaskets are arranged between the front end face of the spacer ring and the rear end face of the smooth hole of the other flange, the spacer ring is tightly pressed against the rear end face of the through hole of the other flange by the fastener screwed on the right end shaft, the taper pin shaft can generate axial tension and displacement by adjusting the fastener, and the through conical faces, the through-diameter expansion sleeve and the limiting expansion sleeve are circumferentially connected with the two, and screwing the left fastener and the right fastener to realize the connection and the clinging of the two flanges.

2. The anti-sliding tool for the flange joint face according to claim 1, characterized in that: the pin shaft with the taper is a slender rod with the taper at the middle section, the two ends of the pin shaft are threaded double-end screws, and the threads and the middle section are in transition connection through arcs.

3. The anti-sliding tool for the flange joint face according to claim 2, characterized in that: the taper of the middle section of the tapered pin shaft is 1: 20-1: 70.

4. The anti-sliding tool for the flange joint face according to claim 1, characterized in that: the pin shaft with the taper is of a bolt structure or a bolt and screw structure, and both ends of the pin shaft with the taper of the bolt structure are blind hole threaded holes; and one end of the bolt and screw rod structure with the taper pin shaft is a screw rod, and the other end of the bolt and screw rod structure is a blind hole threaded hole.

5. The anti-sliding tool for the flange joint face according to claim 1, characterized in that: the latus rectum expands the cover and takes spacing cover that expands and be the sleeve structure of interior awl of excircle, adopts cast copper material, and the excircle is the face of cylinder, and the interior circle is the awl face of cylinder, and four grooves are seted up altogether to the circumferencial direction to 90 degrees equipartitions, two liang of alternately, and latus rectum expands the cover and takes spacing cover inner wall tapering all the same with the external taper of taking the tapering round pin axle.

6. The anti-sliding tool for the flange joint face according to claim 5, wherein: the two grooves extend from the left end to the bottom of the right end and are not communicated with the bottom of the right end, so that the bottom of the right end is kept continuous and complete; the other two grooves at intervals of 90 degrees extend to the bottom of the left end from the right end and are not communicated with the bottom of the left end, so that the bottom of the left end is continuous and complete; the external diameters of the drift diameter expansion sleeve and the expansion sleeve with the limiting function have elasticity, and the installation and the sequential gradual stress application are facilitated.

7. The anti-sliding tool for the flange joint face according to claim 1, characterized in that: the drift diameter expansion sleeve and the expansion sleeve with the limit are made of one of aluminum bronze alloy, tin bronze, beryllium bronze, aluminum alloy and stainless steel.

8. The anti-sliding tool for the flange joint face according to claim 1, characterized in that: the isolating ring is circular or polygonal.