A power tongs apparatus

Abstract

The present application relates to the technical field of drilling wellhead operation equipment, and particularly relates to a power tong device, which comprises a power tong, a lifting mechanism for driving the power tong to lift, and a rack main body for driving the lifting mechanism to slide forward and backward; the lifting mechanism comprises a first sliding inner rack and a second sliding inner rack, the second sliding inner rack, the first sliding inner rack and the rack main body are sequentially and slidably connected from inside to outside; the power tong is suspended on the front side of the second sliding inner rack, the top of the second sliding inner rack is connected with a floating mechanism; the top of the first sliding inner rack is provided with a pulley, and a steel wire rope of the second sliding inner rack is connected with the floating mechanism by passing through the pulley.

Description

Technical Field

[0001] This invention relates to the field of drilling wellhead operation equipment technology, and in particular to a power clamp device. Background Technology

[0002] Running in and out of the well is a crucial part of the drilling process, requiring the connection of the drill string at the wellhead. The workload increases with drilling depth. A power tong is a device that can be moved to the wellhead to connect or disconnect two drill pipes. Traditionally, a power tong is used by suspending a steel cable from it and then manually pushing it to the wellhead to perform the connection / disconnection of the two drill pipes. When not disconnecting the drill pipes, the power tong must be pushed away from the wellhead to prevent it from obstructing the operation. Furthermore, the position of the drill string from the bottom of the wellhead is not fixed during connection / disconnection, and the required thread height varies each time. Existing methods involve high manual labor intensity, poor working conditions, low safety, and are prone to accidents.

[0003] Therefore, there is an urgent need for a power clamp device that can replace the traditional manual operation of power clamps to tighten and loosen tubing, thereby improving the efficiency and safety of tubing tightening and loosening operations. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a power clamp device, which solves the technical problems of existing power clamps requiring manual pulling, resulting in low work efficiency and high danger.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] A power clamp device includes: a power clamp, a lifting mechanism for driving the power clamp to move up and down, and a frame body for driving the lifting mechanism to slide back and forth.

[0009] The lifting mechanism includes a first sliding inner frame and a second sliding inner frame, and the second sliding inner frame, the first sliding inner frame and the frame body are slidably connected from the inside to the outside.

[0010] The power clamp is suspended on the front side of the second sliding inner frame, and the top of the second sliding inner frame is connected to a floating mechanism;

[0011] The top of the first sliding inner frame is provided with a pulley, which is used to pull the steel wire rope of the second sliding inner frame through the pulley and connect to the floating mechanism.

[0012] The floating mechanism includes: a floating cylinder, a guide rod fixed vertically inside the floating cylinder, a spring sleeved on the guide rod, a support plate connected to the bottom of the spring, and a connecting shaft for pulling the support plate to compress the spring;

[0013] The top of the floating cylinder is fixedly connected to the second sliding inner frame, the top of the connecting shaft extends out of the floating cylinder, passes through the top of the second sliding inner frame, and is connected to the wire rope, and the bottom of the connecting shaft is connected to the support plate.

[0014] It also includes a suspension device for suspending the power clamp, the suspension device comprising: a connecting cylinder, a pin shaft, and a spherical bearing;

[0015] The connecting cylinder includes a first connecting cylinder and a second connecting cylinder. The top of the first connecting cylinder is fixedly connected to the second sliding inner frame. The interior of the first connecting cylinder is provided with a groove, and the joint bearing is rotatably connected to the groove.

[0016] The bottom of the first connecting cylinder is provided with a through hole through which the pin can pass, and the diameter of the through hole is larger than the diameter of the pin;

[0017] The top of the pin abuts against the spherical bearing.

[0018] The second connecting cylinder is equipped with a preload spring. The pin passes through the spherical bearing, the first connecting cylinder, the preload spring and the second connecting cylinder in sequence. The bottom end of the pin is equipped with a limiting nut to limit the bottom of the second connecting cylinder.

[0019] The top of the preload spring abuts against the bottom of the first connecting cylinder, and the bottom of the preload spring abuts against the bottom of the second connecting cylinder, with a gap between the first connecting cylinder and the second connecting cylinder;

[0020] The outer side of the second connecting cylinder is provided with a suspension bracket for connecting the power clamp.

[0021] It also includes a sliding base frame, which includes a first sliding base frame arranged along the front-to-back direction and a second sliding base frame arranged along the left-to-right direction. The inner side of the first sliding base frame is provided with a first sliding groove, and the frame body is slidably connected to the first sliding groove.

[0022] The second sliding base is disposed at the bottom of the first sliding base, and the top of the second sliding base is provided with a second sliding groove. The bottom of the first sliding base is fixedly provided with a bolt, the head of which is inserted into the second sliding groove and slidably connected with the second sliding groove.

[0023] It also includes a drive device, which includes a first drive device for driving the frame body to move back and forth, and a second drive device for driving the lifting mechanism to move up and down.

[0024] The first drive device is disposed on both sides of the frame body. The telescopic end of the first drive device is connected to the first sliding base frame, and the connecting end of the first drive device is connected to the frame body. The first drive device drives the frame body to slide along the first slide groove.

[0025] The second drive device is located on the rear side of the first sliding inner frame. The connecting end of the second drive device is connected to the main body, and the telescopic end of the second drive device is connected to the first sliding inner frame. The second drive device drives the first sliding inner frame to slide along the vertical direction of the frame main body.

[0026] The power pliers include an outer frame and a screw-down jaw. Both the outer frame and the jaw have openings for inserting tubing. The outer frame is connected to the suspension bracket, and the jaw is rotatable relative to the outer frame.

[0027] A sensor is fixedly installed on the top of the outer frame of the clamp, and the sensor is used to determine whether the opening of the unscrewing jaw is aligned with the opening of the outer frame of the clamp.

[0028] (III) Beneficial Effects

[0029] The beneficial effects of this invention are as follows: This invention provides a power clamp device, which, through the combination of a frame body and a sliding base, allows the power clamp device to move back and forth. During working hours, it moves to the orifice to perform clamping and unclamping operations, and during non-working hours, it moves away from the orifice without obstructing it. A lifting mechanism is provided to drive the power clamp to rise and fall, meeting the clamping and unclamping requirements at different heights of the tubing string.

[0030] The wire rope is connected to the lifting mechanism through a floating device, which allows the lifting mechanism to float in the vertical direction. This serves as a distance compensation for the vertical floating when the power clamp is tightening or loosening the coupling (unscrewing the pipe string), thus preventing rigid damage between the lifting mechanism and the power clamp.

[0031] The front side of the lifting mechanism is equipped with a suspension device for suspending the power clamp, which serves as the lifting point of the power clamp. Through the setting of the joint bearing, the power clamp can rotate within a small range around the lifting point, avoiding rigid damage to the connection structure between the power clamp and the lifting mechanism. After the power clamp rotates and deviates, it can automatically reset by gravity. Attached Figure Description

[0032] Figure 1 This is a perspective view of the power clamp device of the present invention;

[0033] Figure 2 for Figure 1 A magnified view of a portion of the frame A in the center;

[0034] Figure 3 This is a side view of the power clamp device of the present invention;

[0035] Figure 4 This is a cross-sectional view of the floating device of the present invention;

[0036] Figure 5 This is a perspective view of the second sliding inner frame and suspension device of the present invention;

[0037] Figure 6 This is a cross-sectional view of the suspension device of the present invention;

[0038] Figure 7 This is a top view of the power clamp of the present invention.

[0039] [Explanation of Labels in the Attached Image]

[0040] 1: Sliding base frame; 11: First sliding base frame; 111: First slide groove; 112: Bolt; 12: Second sliding base frame; 121: Second slide groove;

[0041] 2: Main frame; 21: Pipeline support;

[0042] 3: Lifting mechanism; 31: First sliding inner frame; 32: Second sliding inner frame; 33: Pulley;

[0043] 4: Power clamp; 41: Clamp outer frame; 42: Unscrewing jaws; 43: Sensor;

[0044] 5: Drive unit; 51: First drive unit; 52: Second drive unit;

[0045] 6: Floating device; 61: Floating cylinder; 62: Guide rod; 63: Spring; 64: Support plate; 65: Connecting shaft;

[0046] 7: Suspension device; 71: Suspension frame; 72: Connecting cylinder; 721: First connecting cylinder; 722: Second connecting cylinder; 73: Pin; 74: Preload spring; 75: Joint bearing;

[0047] 8: Control device. Detailed Implementation

[0048] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "front" and "rear" are used interchangeably with respect to... Figure 1 The orientation is used as a reference.

[0049] This invention provides a power clamp device, applied in the field of drilling wellhead operation equipment technology. It includes: a sliding base frame 1, and a frame body 2 slidably connected to the sliding base frame 1. The frame body 2 is equipped with a lifting mechanism 3, and a power clamp 4 is connected to the front of the lifting mechanism 3. The frame body 2 is connected to a drive device 5, which pushes the frame body 2 to slide back and forth along the sliding base frame 1. This allows the power clamp 4 to be away from the wellhead during non-operational times and to move to the wellhead during operation times for tightening and loosening the clamp. The lifting mechanism 3 drives the power clamp 4 to rise and fall, meeting the operational needs of tightening and loosening the tubing string at different heights.

[0050] The lifting mechanism 3 is also equipped with a floating device 6, which allows the lifting mechanism 3 to float a distance in the vertical direction, serving as a distance compensation for the up-and-down floating of the power clamp 5 when tightening and loosening the buckle.

[0051] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0052] This invention provides a power clamp device, comprising: a sliding base frame 1, a frame body 2, a lifting mechanism 3, a power clamp 4, a drive device 5, and a control device 8. The frame body 2 is slidably connected to the top of the sliding base frame 1. The lifting mechanism 3 is vertically connected to the front side of the frame body 2. The power clamp 4 is located in front of the lifting mechanism 3. The drive device 5 drives the frame body 2 to move back and forth along the sliding base frame 1, allowing the power clamp 4 to move away from the orifice during non-operating times and to move to the orifice during operating times for attaching and detaching clamps. The drive device 5 drives the lifting mechanism 3 to raise and lower the power clamp 4, meeting the operational requirements of the power clamp 4 for tightening and detaching pipe columns at different heights. The power clamp 4 and the drive device 5 are connected to the control device 8 to achieve automated control of the power clamp device.

[0053] The drive unit 5 includes a first drive unit 51 for driving the frame body 2 to move back and forth, and a second drive unit 52 for driving the lifting mechanism 3 to move up and down. The first drive unit 51 is connected to the frame body 2 and pushes the frame body 2 to move back and forth along the sliding base frame 1. The second drive unit 52 is connected to the lifting mechanism 3 to push the lifting mechanism 3 to rise or fall along the frame body 2. In this embodiment, the first drive unit 51 is a translation cylinder, and the second drive unit 52 is a lifting cylinder.

[0054] The sliding base 1 includes a first sliding base 11 arranged along the front-back direction and a second sliding base 12 arranged along the left-right direction. The first sliding base 11 is disposed on top of the second sliding base 12 and is slidably connected to the second sliding base 12.

[0055] The inner side of the first sliding base frame 11 is provided with a corresponding first sliding groove 111, and the frame body 2 is slidably connected to the first sliding groove 111. The outer side of the first sliding base frame 11 is provided with a mounting groove, and the bolt 112 is fixed in the mounting groove. By providing a mounting groove on the side of the first sliding base frame 11, the bolt 112 does not protrude from the outer surface of the first sliding base frame 11, thus avoiding obstruction of the operation of other mechanisms.

[0056] The top of the second sliding base 12 is provided with a second sliding groove 121. The head of the bolt 112 passes through the first sliding base 11 in the vertical direction and is inserted into the second sliding groove 121, and is slidably connected with the second sliding groove 121 so that the first sliding base 11 can slide along the second sliding groove 121, thereby realizing the sliding adjustment of the first sliding base 11 in the left and right directions.

[0057] The frame body 2 has a frame structure, and the inner sidewalls of the frame body 2, which are opposite to each other, are provided with sliding grooves for connecting the lifting mechanism 3. The bottom of the frame body 2 is provided with pulleys, which are slidably connected to the first sliding groove 111 so that the frame body 2 can slide back and forth along the first sliding base 11.

[0058] The first drive device 51 is installed on both sides of the frame body 2. The telescopic end of the first drive device 51 is connected to the first sliding base frame 11, and the connecting end of the first drive device 51 is connected to the frame body 2. The first drive device 51 is extended and retracted to push the frame body 2 to slide along the first slide groove 111, thereby realizing the forward or backward movement of the power clamp device.

[0059] The main frame 2 is also equipped with a pipeline support 21 for connecting pipelines. The pipeline support 21 serves as a load-bearing structure for the equipment pipelines, meeting the equipment's usage requirements.

[0060] The lifting mechanism 3 includes a first sliding inner frame 31 and a second sliding inner frame 32. The first sliding inner frame 31 and the second sliding inner frame 32 are disposed inside the frame body 2. The second sliding inner frame 32, the first sliding inner frame 31 and the frame body 2 are slidably connected from the inside to the outside.

[0061] The second drive device 52 is located on the rear side of the first sliding inner frame 31. The connecting end of the second drive device 52 is connected to the frame body 2, and the telescopic end of the second drive device 52 is connected to the side of the first sliding inner frame 31. The first sliding inner frame 31 is pushed to slide along the frame body 2 by the telescopic end of the second drive device 52, thereby realizing the raising or lowering of the power clamp device.

[0062] The power clamp 4 is located on the front side of the second sliding inner frame 32. The top of the first sliding inner frame 31 is provided with a pulley 33. One end of the wire rope (not shown) is connected to the second sliding inner frame 32 through the pulley 33, and the other end of the wire rope (not shown) is connected to the frame body 2. The second drive device 52 pushes the first sliding inner frame 31, and at the same time, the wire rope drives the second sliding inner frame 32 to rise or fall along the vertical direction of the first sliding inner frame 31, so as to realize the speed-multiply lifting and lowering of the power clamp 4 relative to the frame body 2.

[0063] It also includes a floating mechanism 6, which is connected to a steel wire rope. The floating mechanism 6 is located on the top of the second sliding inner frame 32. The floating mechanism 6 includes: a floating cylinder 61, a guide rod 62 fixed in the floating cylinder 61 in the vertical direction, a spring 63 sleeved on the guide rod 62, a support plate 64 connected to the bottom of the spring 63, and a connecting shaft 65 for pulling the support plate 64 to compress the spring 63.

[0064] The floating cylinder 61 is fixedly connected to the top of the second sliding inner frame 32. A guide rod 62 is fixedly installed vertically inside the floating cylinder 61. A spring 63 is sleeved on the guide rod 62. The bottom end of the spring 63 is connected to a support plate 64, the top end of the spring 63 abuts against the top of the floating cylinder 61, and the support plate 64 at the bottom end of the spring 63 abuts against the bottom of the floating cylinder 61. A connecting shaft 65 passes through the floating cylinder 61, with its top end extending out of the floating cylinder 61 and passing through the top of the second sliding inner frame 32. The bottom end of the connecting shaft 65 is connected to the support plate 64, passes through the support plate 64, and is fixed by a limiting nut. A wire rope connector is provided at one end of the connecting shaft 65 extending out of the top of the second sliding inner frame 32.

[0065] A steel wire rope passes from the rear of the first sliding inner frame 31, around the pulley 33, and connects to the top of the connecting shaft 65. Pulling the steel wire rope upwards pulls the connecting shaft 65, causing the connecting shaft 65 to drive the support plate 64 to compress the spring 63. The top of the spring 63 abuts against the top of the floating cylinder 61, thereby causing the second sliding inner frame 32, which is fixedly connected to the floating cylinder 61, to rise or fall. By connecting a floating device 6 between the steel wire rope and the second sliding inner frame 32, after the steel wire rope pulls the second sliding inner frame 32, the second sliding inner frame 32 can still have a floating distance in the vertical direction. This serves as compensation for the vertical floating distance when the power clamp 4 is tightening or loosening the buckle (tightening or loosening the pipe column), preventing rigid damage between the lifting mechanism 3 and the power clamp 4.

[0066] A suspension device 7 is provided on the front side of the second sliding inner frame 32. The suspension device 7 is used to suspend the power clamp 4 on the front side of the second sliding inner frame 32, serving as the lifting point of the power clamp 4. The bottom end of the suspension device 7 is connected to the power clamp 4. By setting the suspension device 7, the power clamp 4 can have a small range of rotation around the lifting point, avoiding rigid damage to the connection structure between the power clamp 4 and the second sliding inner frame 32. After the power clamp 4 rotates and deviates, it can automatically reset by gravity.

[0067] The suspension device 7 includes a suspension frame 71, a connecting cylinder 72, a pin 73, a preload spring 74, and a spherical bearing 75. The connecting cylinder 72 is fixed to the front end of the second sliding inner frame 32. The connecting cylinder 72 is segmented, including a first connecting cylinder 721 and a second connecting cylinder 722. The first connecting cylinder 721 and the second connecting cylinder 722 are cylindrical, and the diameter of the first connecting cylinder 721 is larger than that of the second connecting cylinder 722. The interior of the first connecting cylinder 721 has a groove for installing the spherical bearing 75, and the spherical bearing 75 is rotatably connected to the groove. In this embodiment, the spherical bearing 75 is a lubricated thrust spherical bearing. The spherical bearing 75 includes an inner ring and an outer ring. The outer surface of the inner ring is arc-shaped, and the inner surface of the outer ring matches the outer surface of the inner ring. The inner ring and the outer ring are rotatably connected. The top of the pin 73 abuts against the inner ring of the spherical bearing 75, and the bottom of the pin 73 passes through the inner ring. By setting the spherical bearing 75 on the top of the pin 73, the power clamp 4 can be reset under the action of gravity when it deflects in the horizontal direction.

[0068] A preload spring 74 is disposed inside the second connecting cylinder 722. In this embodiment, the preload spring 74 is preloaded by 3mm. The bottom of the first connecting cylinder 721 has a through hole through which the pin 73 can pass. The diameter of the through hole is larger than the diameter of the pin 73 and smaller than the diameter of the second connecting cylinder 722. The pin 73 passes sequentially through the spherical bearing 75, the first connecting cylinder 721, the preload spring 74, and the second connecting cylinder 722. A limiting nut is provided at the bottom end of the pin 73 to limit the bottom of the second connecting cylinder 722, so that the first connecting cylinder 721 and the second connecting cylinder 722 are connected by the pin 73.

[0069] The top of the preload spring 74 abuts against the bottom of the first connecting cylinder 721, and the bottom of the preload spring 74 abuts against the bottom of the second connecting cylinder 722. There is a gap between the first connecting cylinder 721 and the second connecting cylinder 722. By setting the two ends of the preload spring 74 to give the bottom of the first connecting cylinder 721 and the bottom of the second connecting cylinder 722 a prestress, the preload spring 74 can reset the pin 73 when the power clamp 4 drives it to deviate.

[0070] The suspension bracket 71 is connected to the second connecting cylinder 722, and the bottom of the suspension bracket 71 is connected to the power clamp 4. When the power clamp 4 is driven to deviate by the tubing column, the suspension bracket 71 drives the second connecting cylinder 722, which in turn drives the pin 73 to deflect. At the same time, it drives the joint bearing 75 to rotate, compressing the internal preload spring 74. The preload spring 74 generates a reverse force to help the pin 73 return to its original position, thereby resetting the power clamp 4.

[0071] By combining the segmented connecting cylinder 72, the joint bearing 75 and the preload spring 74, the power clamp 4 can have a certain offset in the horizontal direction through the suspension device 7, which avoids rigid damage to the connection structure. At the same time, the power clamp 4 can automatically reset by gravity after rotational offset.

[0072] The power clamp 4 includes an outer frame 41 and a screw-down jaw 42. Both the outer frame 41 and the jaw 42 have openings for inserting the tubing string into the jaw 42. The jaw 42 is rotatable relative to the outer frame 41. A sensor 43 is fixedly installed on the top of the outer frame 41. The sensor 43 is used to determine the rotation position of the jaw 42 and whether the opening of the jaw 42 is aligned with the opening of the outer frame 41. After the jaw 42 rotates to a preset position, the sensor sends feedback to the control device 8 to stop the jaw 42 from rotating.

[0073] When in use, the power clamp device first controls the first drive device 51 to drive the frame body 2 to slide along the sliding base frame 1, moving the power clamp 4 to the orifice position. Then, the second drive device 52 drives the first sliding inner frame 31 to raise the power clamp 4 to the unhooking position of the pipe column and controls the power clamp 4 to clamp the pipe column. The fixed end of the wire rope is connected to the frame body 2, and the other end is connected to the second sliding inner frame 32 through the top pulley 33 of the first sliding inner frame 31. The second drive device 52 drives the first sliding inner frame 31, so that the wire rope moves the second sliding inner frame 32 to rise or fall along the vertical direction of the first sliding inner frame 31, thereby driving the power clamp 4 to rise or fall at a speed of twice the normal speed to the upper unhooking position of the pipe column.

[0074] This invention provides a power clamp device. Through the combined arrangement of the frame body 2 and the sliding base 1, the power clamp device can move back and forth. During working hours, it moves to the orifice to perform clamping and unclamping operations, and during non-working hours, it moves away from the orifice to avoid obstructing it. A lifting mechanism 3 drives the power clamp 4 to rise and fall, meeting the clamping and unclamping requirements for pipe columns at different heights.

[0075] The wire rope is connected to the lifting mechanism 3 through the floating device 6, so that the lifting mechanism 3 has a floating distance in the vertical direction. This serves as a distance compensation for the vertical floating when the power clamp 4 is tightening or loosening the buckle (tightening or loosening the pipe column), thus avoiding rigid damage between the lifting mechanism 3 and the power clamp 4.

[0076] The front side of the lifting mechanism 3 is provided with a suspension device 7 for suspending the power clamp 4. This device serves as the suspension point for the power clamp 4, allowing the power clamp 4 to rotate within a small range around the suspension point. This prevents rigid damage to the connection structure between the power clamp 4 and the lifting mechanism 3. Furthermore, the power clamp 4 can automatically reset by gravity after rotational deviation.

[0077] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0078] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0079] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0080] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0081] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A power clamp device, characterized in that, include: The power clamp (4), the lifting mechanism (3) for driving the power clamp (4) to rise and fall, and the frame body (2) for driving the lifting mechanism (3) to slide back and forth. The lifting mechanism (3) includes a first sliding inner frame (31) and a second sliding inner frame (32), and the second sliding inner frame (32), the first sliding inner frame (31) and the frame body (2) are slidably connected from the inside to the outside. The power clamp (4) is suspended on the front side of the second sliding inner frame (32), and the top of the second sliding inner frame (32) is connected to the floating mechanism (6). The top of the first sliding inner frame (31) is provided with a pulley (33) for the steel wire rope that pulls the second sliding inner frame (32) through the pulley (33) and connects to the floating mechanism (6). It also includes a suspension device (7) for suspending the power clamp (4), the suspension device (7) comprising: a connecting cylinder (72), a pin (73) and a spherical bearing (75); The connecting cylinder (72) includes a first connecting cylinder (721) and a second connecting cylinder (722). The top of the first connecting cylinder (721) is fixedly connected to the second sliding inner frame (32). The interior of the first connecting cylinder (721) is provided with a groove, and the joint bearing (75) is rotatably connected to the groove. The bottom of the first connecting cylinder (721) is provided with a through hole through which the pin (73) can pass, and the diameter of the through hole is larger than the diameter of the pin (73); The top of the pin (73) abuts against the spherical bearing (75); The second connecting cylinder (722) is provided with a preload spring (74), and the pin (73) passes through the spherical bearing (75), the first connecting cylinder (721), the preload spring (74) and the second connecting cylinder (722) in sequence. The bottom end of the pin (73) is provided with a limiting nut to limit the bottom of the second connecting cylinder (722). The top of the preload spring (74) abuts against the bottom of the first connecting cylinder (721), and the bottom of the preload spring (74) abuts against the bottom of the second connecting cylinder (722). A gap is left between the first connecting cylinder (721) and the second connecting cylinder (722). The second connecting cylinder (722) has a suspension bracket (71) on its outer side for connecting the power clamp (4).

2. The power clamp device according to claim 1, characterized in that, The floating mechanism (6) includes: a floating cylinder (61), a guide rod (62) fixed in the floating cylinder (61) in the vertical direction, a spring (63) sleeved on the guide rod (62), a support plate (64) connected to the bottom of the spring (63), and a connecting shaft (65) for pulling the support plate (64) to squeeze the spring (63). The top of the floating cylinder (61) is fixedly connected to the second sliding inner frame (32), the top end of the connecting shaft (65) extends out of the floating cylinder (61), passes through the top of the second sliding inner frame (32), and is connected to the wire rope, and the bottom of the connecting shaft (65) is connected to the support plate (64).

3. The power clamp device according to claim 1, characterized in that, It also includes a sliding base frame (1), which includes a first sliding base frame (11) arranged along the front-back direction and a second sliding base frame (12) arranged along the left-right direction. The inner side of the first sliding base frame (11) is provided with a first sliding groove (111), and the frame body (2) is slidably connected to the first sliding groove (111).

4. The power clamp device according to claim 3, characterized in that, The second sliding base (12) is located at the bottom of the first sliding base (11). The top of the second sliding base (12) is provided with a second sliding groove (121). The bottom of the first sliding base (11) is fixedly provided with a bolt (112). The head of the bolt (112) is inserted into the second sliding groove (121) and is slidably connected with the second sliding groove (121).

5. The power clamp device according to claim 3, characterized in that, It also includes a drive device (5), which includes a first drive device (51) for driving the frame body (2) to move back and forth, and a second drive device (52) for driving the lifting mechanism (3) to lift.

6. The power clamp device according to claim 5, characterized in that, The first drive device (51) is disposed on both sides of the frame body (2). The telescopic end of the first drive device (51) is connected to the first sliding base frame (11), and the connecting end of the first drive device (51) is connected to the frame body (2). The first drive device (51) drives the frame body (2) to slide along the first slide groove (111).

7. The power clamp device according to claim 5, characterized in that, The second drive device (52) is located on the rear side of the first sliding inner frame (31). The connecting end of the second drive device (52) is connected to the frame body (2), and the telescopic end of the second drive device (52) is connected to the first sliding inner frame (31). The second drive device (52) drives the first sliding inner frame (31) to slide along the vertical direction of the frame body (2).

8. The power clamp device according to claim 1, characterized in that, The power clamp (4) includes a clamp body frame (41) and a screw-off jaw (42). Both the clamp body frame (41) and the screw-off jaw (42) are provided with openings for inserting tubing. The clamp body frame (41) is connected to the suspension bracket (71), and the screw-off jaw (42) is rotatable relative to the clamp body frame (41). A sensor (43) is fixedly provided on the top of the outer frame (41) of the clamp, and the sensor (43) is used to determine whether the opening of the unscrewing jaw (42) is aligned with the opening of the outer frame (41) of the clamp.

Images