CN217518615U - Floating track assembly for iron roughneck and iron roughneck - Google Patents

Abstract

The utility model provides an iron roughneck unsteady track subassembly and iron roughneck relates to mechanical equipment technical field. The floating rail assembly for the iron roughneck comprises an elastic unit, and a first rail and a second rail which are coaxially arranged, wherein the first rail and the second rail are respectively used for being connected with main tongs and back tongs of the iron roughneck; the elastic unit comprises a guide rod, an elastic element and a limiting piece, and the guide rod is arranged on the side wall of the first rail in a penetrating mode and is suitable for being abutted to the second rail; the limiting part is detachably connected with the first rail, the limiting part is located at one end, far away from the second rail, of the guide rod, the elastic element is located between the limiting part and the guide rod, and two ends of the elastic element are respectively abutted to the limiting part and the guide rod. The locating part can be detached from one side of the first rail far away from the second rail, so that the elastic element and the guide rod can be taken out from one side of the first rail far away from the second rail, and the elastic unit is convenient to overhaul and replace.

Description

Floating track assembly for iron roughneck and iron roughneck

Technical Field

The utility model relates to a mechanical equipment technical field particularly, relates to an iron roughneck unsteady track subassembly and iron roughneck.

Background

In the process of the tripping operation of the drilling and repairing well drilling tools, the iron roughneck clamps the two drilling tools through a main clamp (also called a tripping clamp) and a back clamp respectively, and realizes the tripping (also called tripping) or fastening (also called a fastening) of the two drilling tools through the mutual rotation of the main clamp and the back clamp.

Due to factors such as synchronous errors of the main tong clamping oil cylinder and the back tong clamping oil cylinder, centering errors of the tong heads and the like, the center of the drilling tool and the center of the guide rail on the tong heads may deviate. When the center of the drilling tool deviates from the center of the guide rail on the tong head, the main tong and the back-up tong are easy to rotate or block.

At present, limit rails are generally arranged on a main tong (also called a punching tong) and a back-up tong of an iron roughneck respectively, an elastic unit is arranged between the limit rails, and the deviation between the center of a drilling tool and the center of a guide rail is compensated through the deformation of the elastic unit, so that the phenomenon of rotation resistance or locking is prevented. However, because the limiting rail is arranged between the main tong and the back-up tong, when the elastic unit is disassembled and assembled, the main tong and the back-up tong need to be separated, the elastic unit is inconvenient to disassemble and assemble and maintain, and the overhauling and replacing efficiency is affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem how take place to hinder under commentaries on classics or the dead prerequisite of card phenomenon avoiding main pincers and back-up tong, improve the maintenance efficiency of anvil worker.

In order to solve the technical problem, in a first aspect, the present invention provides an iron roughneck floating track assembly, which includes an elastic unit, and a first track and a second track coaxially disposed, wherein the first track and the second track are respectively used for connecting with a main tong and a back-up tong of an iron roughneck; the elastic unit comprises a guide rod, an elastic element and a limiting piece, and the guide rod is arranged on the side wall of the first rail in a penetrating mode and is suitable for being abutted to the second rail; the limiting part is detachably connected with the first rail, the limiting part is located at one end, far away from the second rail, of the guide rod, the elastic element is located between the limiting part and the guide rod, and two ends of the elastic element are respectively abutted to the limiting part and the guide rod.

Thus, by respectively arranging the first track and the second track on the main tong and the back-up tong, the guide rod in the elastic unit is arranged at one side far away from the second track in a penetrating way and is abutted against the second track, the limiting piece is arranged at one end of the guide rod far away from the second track, the limiting piece is detachably connected with the first track, the guide rod can be prevented from being separated from the first track from one side far away from the second track through the limiting piece, the elastic element is arranged between the guide rod and the limiting piece, two ends of the elastic element are respectively abutted against the limiting piece and the guide rod, the guide rod can be kept in a state of being abutted against the second track by utilizing the elastic performance of the elastic element, when the main tong and the back-up tong relatively rotate, the deviation between the center of the drilling tool and the center of the guide rail can be compensated by utilizing the deformation of the elastic element arranged between the limiting piece and the guide rod, and the reliable guiding of the relative rotation of the first track and the second track can be ensured, when the elastic unit is worn due to long-term use and maintenance operation needs to be carried out on the elastic unit, the limiting piece can be detached from one side far away from the second rail, the elastic element and the guide rod can be taken out from the first rail from one side far away from the second rail, and maintenance on the elastic unit can be realized under the condition that the first rail and the second rail are not detached.

Optionally, the position of the limiting member is adjustably disposed on the first rail along the direction in which the guide rod penetrates through the first rail.

So, can adjust elastic element's pretightning force size as required through adjusting the locating part for first orbital position, guarantee that elastic element is normal reset and deformation under long-time operating condition, effectively avoid elastic element's inefficacy.

Optionally, the first rail is provided with a mounting hole structure, the mounting hole structure penetrates through a side wall of the first rail, and the guide rod penetrates through the mounting hole structure and is slidably connected with the mounting hole structure.

So, set up the mounting hole structure at first track to guide bar and mounting hole structure sliding connection provide the direction for the motion of guide bar in the mounting hole structure, avoid the guide bar to lead to guide bar and elastic element's damage at the skew of motion process, improve the stability of elastic unit work, simple structure, the practicality is strong.

Optionally, the mounting hole structure is further adapted to accommodate the elastic element, and the limiting member is located at one end of the mounting hole structure, which is far away from the second rail, and is detachably connected to the mounting hole structure.

So, can realize the installation and the location to locating part, elastic element and guide bar through the mounting hole structure, compare in setting up a plurality of structures at first track and install locating part, elastic element and guide bar respectively, the structure is simpler, and mounting structure is compact.

Optionally, the guide rod includes a first rod segment and a second rod segment, wherein a cross-sectional area of the first rod segment is smaller than a cross-sectional area of the second rod segment, the second rod segment is located between the first rod segment and the second rail, the elastic element is sleeved on the first rod segment, and two ends of the elastic element are respectively abutted to the limiting member and the second rod segment.

So, can establish the elastic element cover on first pole section, and elastic element's both ends respectively with locating part and second pole section butt, avoid elastic element to lead to its position change in the mounting hole structure because of receiving the extrusion, guarantee at guide bar motion in the mounting hole structure in elastic element's stability.

Optionally, the installation hole structure includes a first hole section and a second hole section, wherein the second hole section is disposed near the second rail, a cross-sectional area of the second hole section is smaller than a cross-sectional area of the first hole section, the guide rod further includes a third rod section, the first rod section, the second rod section and the third rod section are distributed in sequence, and a cross-sectional area of the third rod section is smaller than a cross-sectional area of the second rod section; the third rod section is connected with the second hole section in a sliding mode, and the end face, close to the first hole section, of the second hole section is suitable for being abutted to the second rod section.

Therefore, the third rod section is connected with the second hole section in a sliding mode, so that guidance is provided for the movement of the guide rod in the mounting hole structure, and the working stability of the elastic unit is guaranteed; and when the third rod section of the guide rod is in a non-abutting state with the second track, the cross sectional area of the second rod section is larger than that of the second hole section, so that the end surface of the second hole section close to the first hole section limits the guide rod to be separated from the first track towards one side close to the second track, and the guide rod and the elastic element are prevented from being directly popped out from the mounting hole structure.

Optionally, the limiting member is in threaded connection with the mounting hole structure.

Therefore, the position of the limiting part in the mounting hole structure can be set according to the size of the pretightening force for adjusting the elastic element, and the pretightening force required by the elastic element under various working environments can be accurately adjusted.

Optionally, a through hole is formed in the limiting member, and the guide rod is suitable for being slidably inserted into the through hole.

So, when the guide bar received the effort from the second track great, the guide bar was close to the one end of locating part and can be slided and wear to locate the perforation, can avoid guide bar and locating part butt, leads to the damage of guide bar and locating part. In addition, the perforation can also provide guidance for the movement of the guide rod in the mounting hole structure to a certain extent, and the perforation and the mounting hole structure together realize reliable guidance of the guide rod.

Optionally, the first rail is disposed outside the second rail.

Therefore, when the guide rod and the elastic element need to be replaced, the limiting piece can be detached from the first rail on the outer side of the first rail, so that the elastic element and the guide rod are taken out, and the replacement of the elastic unit is completed.

The second aspect of the present invention also provides an iron roughneck, comprising the floating rail assembly of the above first aspect.

The iron roughneck has the beneficial effects of the iron roughneck floating track component, and the details are not repeated herein.

Drawings

Fig. 1 is a schematic structural view of an iron roughneck floating track assembly in an embodiment of the present invention;

fig. 2 is an enlarged schematic view of the present invention at a in fig. 1;

fig. 3 is a schematic structural diagram of the elastic unit in the present invention;

fig. 4 is a schematic structural diagram of another view angle of the floating rail assembly for the iron roughneck according to the embodiment of the present invention.

Description of reference numerals:

1-first rail, 11-first connection hole, 12-mounting hole structure, 121-first hole section, 122-second hole section, 2-second rail, 21-second connection hole, 3-elastic unit, 31-limiting member, 311-through hole, 32-elastic element, 33-guide bar, 331-first bar section, 332-second bar section, 333-third bar section, 4-notch.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the terms "an example," "one example," and "one implementation," etc., mean that a particular feature, structure, material, or characteristic described in connection with the example or implementation is included in at least one example or implementation of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

As shown in fig. 1 and fig. 2, in order to solve the above technical problem, an embodiment of the present invention provides an iron roughneck floating track assembly, which includes an elastic unit 3 and a first track 1 and a second track 2 coaxially disposed, where the first track 1 and the second track 2 are respectively used for connecting with a main tong and a back-up tong of an iron roughneck; the elastic unit 3 comprises a guide rod 33, an elastic element 32 and a limiting piece 31, wherein the guide rod 33 is arranged on the side wall of the first rail 1 from the side far away from the second rail 2 in a penetrating way and is suitable for being abutted with the second rail 2; the limiting member 31 is detachably connected to the first rail 1, the limiting member 31 is located at one end of the guide rod 33 far away from the second rail 2, the elastic element 32 is located between the limiting member 31 and the guide rod 33, and two ends of the elastic element are respectively abutted to the limiting member 31 and the guide rod 33.

It should be noted that the first rail 1 and the second rail 2 are respectively connected to a main tong (not shown in the figure) and a back-up tong (not shown in the figure) of an iron roughneck, where the first rail 1 is connected to the main tong, the second rail 2 is connected to the back-up tong, or the first rail 1 is connected to the back-up tong, the second rail 2 is connected to the main tong, and the connection modes of the first rail 1 and the second rail 2 to the main tong and the back-up tong respectively are detachable connections, such as threaded connection, clamping connection, and the like. The first track 1 and the second track 2 have a certain clearance in the radial direction so that the resilient unit 3 has room to accommodate the offset in compensating the centre of the guide rail and the centre of the drill.

Illustratively, the first rail 1 is provided with a first connecting hole 11, the second rail 2 is provided with a second connecting hole 21, the first rail 1 can be connected with the main tong by a bolt penetrating through the first connecting hole 11 (of course, the first rail 1 and the main tong can also be integrally connected), and the second rail 2 can be connected with the back-up tong by a bolt penetrating through the second connecting hole 21; alternatively, the first rail 1 may be connected to the back-up tong by bolts inserted through the first connection holes 11, and the second rail 2 may be connected to the main tong by bolts inserted through the second connection holes 21.

It should be noted that the present invention will be described in the specification by taking the first rail 1 located outside the second rail 2 as an example, but it should be understood that the first rail 1 may also be located inside the second rail 2.

As shown in fig. 1 and 2, when the first rail 1 is located outside the second rail 2, the guide rod 33 of the elastic unit 3 penetrates the first rail 1 from a side away from the second rail 2 (i.e., outside the first rail 1) and abuts against the outer wall of the second rail 2, and the cross-sectional shape of the guide rod 33 may be a square, a polygon, or various combinations thereof, which is not limited herein. The limiting part 31 is located at one end of the first rail 1 far away from the second rail 2, the limiting part 31 is located on a moving path of the guide rod 33, the limiting part 31 is detachably connected with the first rail 1, and the detachable connection mode can be a threaded connection mode, a clamping connection mode or other detachable connection modes.

It should be noted that the guide rod 33 is inserted into the first rail 1, and is not limited to the first rail 1 being provided with a through hole (for example, the mounting hole structure 12 described later) penetrating in the radial direction, but may also be provided with a T-shaped sliding slot extending in the radial direction on the end surface of the first rail 1, and the guide rod 33 is partially inserted into the T-shaped sliding slot and is connected with the T-shaped sliding slot in a sliding manner.

The manner of mounting the elastic unit is exemplarily illustrated as follows: firstly, the guide rod 33 is inserted into the first rail 1, then one end of the elastic element 32 is abutted with one end of the guide rod 33 far away from the second rail 2, and finally the limiting piece 31 is installed at one end of the first rail 1 far away from the guide rod 33, so that the other end of the elastic element 32 is abutted with the limiting piece 31, thereby completing the installation of the elastic unit 3, and the operation step of detaching the elastic unit 3 is opposite to the installation step, and is not described herein again.

The advantage of such an arrangement is that the first rail 1 and the second rail 2 are respectively arranged on the main tong and the back-up tong, the guide rod 33 in the elastic unit 3 is inserted into the first rail 1 from the side far away from the second rail 2 and is abutted against the second rail 2, the stopper 31 is arranged at the end of the guide rod 33 far away from the second rail 2, the stopper 31 is detachably connected with the first rail 1, the stopper 31 can prevent the guide rod 33 from separating from the first rail 1 from the side far away from the second rail 2, the elastic element 32 is arranged between the guide rod 33 and the stopper 31, the two ends of the elastic element 32 are respectively abutted against the stopper 31 and the guide rod 33, the guide rod 33 can be kept in a state of being abutted against the second rail 2 by using the elastic property of the elastic element 32, when the main tong and the back-up tong relatively rotate, the deformation of the elastic element 32 arranged between the stopper 31 and the guide rod 33 is used, the deviation of the drill centre from the guide centre can be compensated and a reliable guidance of the relative rotation of the first track 1 and the second track 2 can be ensured. When the elastic unit 3 is worn due to long-term use and needs to be maintained, the limiting part 31 can be detached from one side far away from the second rail 2, the elastic element 32 and the guide rod 33 can be taken out from the first rail 1 from one side far away from the second rail 2, the elastic unit 3 can be maintained quickly under the condition that the first rail 1 and the second rail 2 are not detached, the structure is simple, and the practicability is high.

Optionally, the position-limiting member 31 is adjustably disposed on the first rail 1 along the direction in which the guide rod 33 penetrates through the first rail 1.

For example, the limiting member 31 may be a clamping member, the first rail 1 is provided with a plurality of clamping positions along the radial direction, and the clamping position clamped by the clamping member may be selected according to the requirement of the pretightening force of the elastic element 32.

So, because elastic element 32's both ends respectively with locating part 31 and guide bar 33 butt to can adjust elastic element 32's pretightning force size as required through adjusting locating part 31 for first track 1's position, guarantee elastic element 32 normal restoration and deformation under long-time operating condition, effectively avoid elastic element 32's inefficacy.

As shown in fig. 2, optionally, the first rail 1 is provided with a mounting hole structure 12, the mounting hole structure 12 penetrates through a sidewall of the first rail 1, and the guide rod 33 penetrates through the mounting hole structure 12 and is slidably connected with the mounting hole structure 12.

As shown in fig. 1 and fig. 2, the mounting hole structure 12 exemplarily penetrates the first rail 1 in the radial direction, but it should be noted that the size of the mounting hole structure 12 in the radial direction does not necessarily correspond to the radial size of the first rail 1, for example, the first rail 1 may be step-shaped, and the mounting hole structure 12 is installed on a certain level of the first rail 1, in this case, the size of the mounting hole structure 12 in the radial direction may be smaller than the maximum radial size of the first rail 1, which is not limited.

It should be noted that the guide rod 33 may be integrally connected to the mounting hole structure 12 in a sliding manner, or a part of the guide rod 33 may be connected to the mounting hole structure 12 in a sliding manner, which will be described in detail later and will not be described again. The plurality of elastic units 3 are distributed in sequence, for example, equidistantly distributed along the circumferential direction of the first rail 1, and the cross-sectional shape of the mounting hole structure 12 may be circular, square or various combinations thereof, which is not limited herein.

So, set up mounting hole structure 12 at first track 1 to guide bar 33 and mounting hole structure 12 sliding connection provide the direction for the motion of guide bar 33 in mounting hole structure 12, avoid guide bar 33 to lead to the damage of guide bar 33 and elastic element 32 at the skew of motion process, improve the stability of elastic element 3 work, simple structure, the practicality is strong.

Optionally, the mounting hole structure 12 is further adapted to receive an elastic element 32, the limiting member 31 is located at an end of the mounting hole structure 12 away from the second rail 2, and the limiting member 31 is detachably connected to the mounting hole structure 12.

As shown in fig. 2 and 3, the mounting hole structure 12 may be used to mount the limiting member 31, the elastic element 32 and the guide rod 33, the elastic element 32 may be sleeved around the guide rod 33, one end of the elastic element 32 abuts against a second rod segment 332 (described later) of the guide rod 33, the other end abuts against the limiting member 31, or the elastic element 32 may be directly filled between the guide rod 33 and the limiting member 31.

It should be noted that, the elastic element may be a spring, rubber, or the like, and the limiting member 31 may be detachably connected to the mounting hole structure 12 in a manner of screw connection, clamping connection, or other detachable connection manners, which is not limited herein. For example, the limiting member 31 may be a clamping member, and a clamping position clamped with the clamping member is arranged in one end of the first rail 1 away from the guide rod 33, so as to arrange the clamping member on the first rail 1.

In this way, by providing the mounting hole structure 12 on the first rail 1, the mounting and positioning of the limiting member 31, the elastic element 32, and the guide rod 33 can be achieved by the mounting hole structure 12, and compared with the case where a plurality of structures are provided on the first rail 1 to mount the limiting member 31, the elastic element 32, and the guide rod 33, respectively, the structure is simpler and the mounting structure is compact.

As shown in fig. 2 and fig. 3, optionally, the guide rod 33 includes a first rod segment 331 and a second rod segment 332, wherein a cross-sectional area of the first rod segment 331 is smaller than a cross-sectional area of the second rod segment 332, the second rod segment 332 is located between the first rod segment 331 and the second track 2, the elastic element 32 is sleeved on the first rod segment 331, and two ends of the elastic element abut against the limiting member 31 and the second rod segment 332, respectively.

The first pole segment 331 is disposed at an end of the second pole segment 332 away from the second track 2, and the first pole segment 331 and the second pole segment 332 may be integrally connected or detachably connected.

Thus, the cross-sectional area of the first rod segment 331 is smaller than the cross-sectional areas of the second rod segment 332 and the mounting hole structure 12, so that an accommodating cavity structure is formed between the outer wall of the first rod segment 331 and the mounting hole structure 12, the accommodating cavity structure can be used for sleeving the elastic element 32 on the first rod segment 331, and two ends of the elastic element 32 are respectively abutted to the limiting piece 31 and the second rod segment 332, thereby avoiding the deformation and the reset of the elastic element 32 caused by the position change of the elastic element 32 in the mounting hole structure 12 due to extrusion, and ensuring the stability of the elastic element 32 in the movement process of the guide rod 33 in the mounting hole structure 12.

As shown in fig. 2 and 3, optionally, the mounting hole structure 12 includes a first hole section 121 and a second hole section 122, wherein the second hole section 122 is disposed near the second rail 2, the cross-sectional area of the second hole section 122 is smaller than that of the first hole section 121, the guide bar 33 further includes a third rod section 333, the first rod section 331, the second rod section 332 and the third rod section 333 are distributed in sequence, and the cross-sectional area of the third rod section 333 is smaller than that of the second rod section 332; the third rod segment 333 is slidably connected to the second bore segment 122, and the end surface of the second bore segment 122 adjacent to the first bore segment 121 is adapted to abut the second rod segment 332.

The first hole section 121 and the second hole section 122 are communicated with each other, the first hole section 121 is disposed at an end of the second hole section 122 far from the second rail 2, and the third rod section 333 and the second rod section 332 may be integrally connected or detachably connected, which is not limited herein.

In this way, since the third rod segment 333 is slidably connected to the second hole segment 122, the guide rod 33 is guided in the mounting hole structure 12, and the operation stability of the elastic unit 3 is ensured. In addition, the first and second rod segments 331 and 332 are located within the first bore segment 121, and the second rod segment 332 has a cross-sectional area greater than that of the second bore segment, thereby enabling the second rod segment 332 to abut the end face of the second bore segment 122 proximate to the first bore segment 121. When the first rail 1 is separated from the second rail 2, that is, the third rod segment 333 of the guide rod 33 is in a non-abutting state with the second rail 2, since the cross-sectional area of the second rod segment 332 is larger than that of the second hole segment 122, the end surface of the second hole segment 122 close to the first hole segment 121 restricts the guide rod 33 from being separated from the first rail 1 to the side close to the second rail 2, and the guide rod 33 and the elastic element 32 are prevented from being directly ejected from the mounting hole structure 12.

Optionally, the limiting member 31 is screwed with the mounting hole structure 12.

As shown in fig. 2, in the present embodiment, the limiting member 31 is a movable jackscrew, and an internal thread matching with the movable jackscrew is provided in the mounting hole structure 12.

Therefore, the position of the limiting member 31 in the mounting hole structure 12 can be quickly adjusted, and the deformation of the elastic element 32 is changed, so that the pretightening force of the elastic element 32 can be quickly adjusted.

Optionally, a through hole 311 is disposed on the limiting member 31, and the guide rod 33 is adapted to slidably pass through the through hole 311.

As shown in fig. 2 and 3, a through hole 311 is disposed at one end of the limiting member 31 near the guide rod 33, and the cross-sectional area of the through hole 311 is larger than that of the first rod segment 331, so that the first rod segment 331 can be inserted into the through hole 311, and the through hole 311 can be disposed as a through structure, which will not be described in detail herein.

Thus, when the guide rod 33 receives a large acting force from the second rail 2, one end of the guide rod 33 close to the limiting member 31 can be slidably inserted into the through hole 311 (for example, the first rod segment 331 is slidably inserted into the through hole 311), so that the guide rod 33 (for example, the first rod segment 331) can be prevented from abutting against the limiting member 31, and the guide rod 33 and the limiting member 31 can be prevented from being damaged. In addition, the through hole 311 may also provide a certain guide for the movement of the guide rod 33 in the mounting hole structure 12, and together with the mounting hole structure 12, a reliable guide for the guide rod 33 is achieved.

As shown in fig. 4, the first rail 1 is optionally disposed outside the second rail 2.

In this way, when the guide rod 33 and the elastic element 32 need to be replaced, the limiting member 31 can be detached from the first rail 1 at the outer side of the first rail 1, so that the elastic element 32 and the guide rod 33 can be taken out, and the replacement of the elastic unit 3 is completed.

Of course, the first rail 1 may also be disposed inside the second rail 2, and at this time, the limiting member 31 may be detached from the circular hole of the first rail 1, which will not be described in detail herein.

In addition, it should be noted that the first rail 1 and the second rail 2 are both provided with a notch 4, and the notch 4 is used for entering or exiting the drilling tool.

When the first rail 1 is disposed inside the second rail 2, the stopper 31 on the first rail 1 located inside can be removed through the notch 4, the elastic element 32 and the guide rod 33 are taken out, and the replacement of the elastic unit 3 is completed.

Another embodiment of the present invention provides an iron roughneck, comprising the above iron roughneck floating rail assembly. The first rail 1 and the second rail 2 of the floating rail assembly for the iron roughneck are respectively connected with the main clamp and the back clamp.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims (10)

1. The floating rail assembly for the iron roughneck is characterized by comprising an elastic unit (3), a first rail (1) and a second rail (2) which are coaxially arranged, wherein the first rail (1) and the second rail (2) are respectively used for being connected with main tongs and back tongs of the iron roughneck; the elastic unit (3) comprises a guide rod (33), an elastic element (32) and a limiting piece (31), wherein the guide rod (33) is arranged on the side wall of the first track (1) in a penetrating mode and is suitable for being abutted to the second track (2); the limiting part (31) is detachably connected with the first track (1), the limiting part (31) is located at one end, away from the second track (2), of the guide rod (33), the elastic element (32) is located between the limiting part (31) and the guide rod (33), and two ends of the elastic element are respectively abutted to the limiting part (31) and the guide rod (33).

2. The iron roughneck floating rail assembly according to claim 1, characterized in that the stopper (31) is position-adjustably provided to the first rail (1) in a direction in which the guide rod (33) is inserted through the first rail (1).

3. The iron roughneck floating track assembly according to claim 1, characterized in that the first track (1) is provided with a mounting hole structure (12), the mounting hole structure (12) penetrates through a side wall of the first track (1), and the guide rod (33) penetrates through the mounting hole structure (12) and is slidably connected with the mounting hole structure (12).

4. The iron roughneck floating track assembly according to claim 3, characterized in that the mounting hole structure (12) is further adapted to receive the elastic element (32), the stopper (31) is located at an end of the mounting hole structure (12) remote from the second track (2), and the stopper (31) is detachably connected with the mounting hole structure (12).

5. The iron roughneck floating track assembly according to claim 4, characterized in that the guide rod (33) comprises a first rod section (331) and a second rod section (332), wherein the cross-sectional area of the first rod section (331) is smaller than the cross-sectional area of the second rod section (332), the second rod section (332) is located between the first rod section (331) and the second track (2), the elastic element (32) is sleeved on the first rod section (331), and both ends are respectively abutted with the stopper (31) and the second rod section (332).

6. The iron roughneck floating track assembly according to claim 5, characterized in that the mounting hole structure (12) comprises a first hole section (121) and a second hole section (122), wherein the second hole section (122) is arranged close to the second track (2), the cross-sectional area of the second hole section (122) is smaller than the cross-sectional area of the first hole section (121), the guide bar (33) further comprises a third bar section (333), the first bar section (331), the second bar section (332) and the third bar section (333) are distributed in sequence, the cross-sectional area of the third bar section (333) is smaller than the cross-sectional area of the second bar section (332); the third rod segment (333) is slidably connected to the second bore segment (122), and an end surface of the second bore segment (122) adjacent to the first bore segment (121) is adapted to abut the second rod segment (332).

7. The iron roughneck floating track assembly according to claim 4, characterized in that the stop (31) is threadedly connected with the mounting hole structure (12).

8. The iron roughneck floating track assembly according to claim 1, characterized in that the retaining member (31) is provided with a through hole (311), and the guide rod (33) is adapted to be slidably disposed through the through hole (311).

9. The iron roughneck floating rail assembly according to any one of claims 1-8, characterized in that the first rail (1) is arranged outside the second rail (2).

10. An iron roughneck comprising the iron roughneck floating rail assembly of any one of claims 1-9.

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