Automatic reversing device for main tongs of hydraulic power tongs

Abstract

The invention discloses a hydraulic power tong main tong automatic reversing device which comprises a ratchet wheel assembly, a pawl assembly and a driving assembly, the ratchet wheel assembly comprises a ratchet wheel and a reset rotating shaft, the driving assembly drives the ratchet wheel and the reset rotating shaft to rotate synchronously, the pawl assembly is matched with the ratchet wheel, and the pawl assembly is matched with the ratchet wheel. And the ratchet wheel rotates in one direction. According to the automatic reversing device for the main tongs of the hydraulic power tongs, the internal structure of the original hydraulic power tongs does not need to be changed at all, and the screwing-on and screwing-off operation of the manual conversion main tongs is not influenced. According to the switching device, the screwing-on state and the screwing-off state of the main tong of the hydraulic power tong can be remotely switched, a reset knob does not need to be manually rotated in the using process of minor repair automation equipment, the automation degree of the equipment is improved, the safety risk of workers in wellhead operation is reduced, and the operation efficiency can be remarkably improved in automatic plug valve installation or automatic sand washing operation.

Description

Technical Field

[0001] The invention relates to a well repairing equipment, more specifically, to an automatic reversing device for main tongs of a hydraulic power tong. Background Art

[0002] At present, minor repair automation equipment has been widely used in various oil fields. Hydraulic power tongs have realized automatic shifting, automatic make-up and break-out, automatic opening and automatic advance and retreat. However, when making and breaking up, most hydraulic power tongs still rely on manual rotation of the reset knob 180° to achieve this, and the work efficiency needs to be further improved. Summary of the invention

[0003] Based on this, it is necessary to provide an automatic reversing device for the main tongs of a hydraulic power tongs to address the above technical problems.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A hydraulic power tongs main tongs automatic reversing device, the hydraulic power tongs main tongs automatic reversing device comprises a ratchet assembly, a pawl assembly and a drive assembly, the ratchet assembly comprises a ratchet and a reset rotating shaft, the drive assembly drives the ratchet and the reset rotating shaft to rotate synchronously, the pawl assembly cooperates with the ratchet and causes the ratchet to rotate unidirectionally.

[0005] As a preferred embodiment of the present invention, the driving component is a pneumatic component.

[0006] As a preferred embodiment of the present invention, the ratchet assembly comprises a positioning seat, the center of the positioning seat is provided with a positioning center hole, the two sides of the positioning seat are provided with positioning seat fixing holes, the positioning seat fixing holes are fixedly connected to the brake steel plate of the hydraulic power pliers through positioning seat screws, the reset rotating shaft is rotatably arranged in the positioning center hole, the top of the reset rotating shaft is provided with a reset knob, the reset knob comprises a long strip-shaped knob body, the center of the knob body is provided with an annular knob sleeve, the side wall of the knob sleeve is provided with a sleeve pin hole, the top of the reset rotating shaft is provided with a reset rotating shaft pin hole, the reset rotating shaft pin hole and the sleeve pin hole are connected by a pin, the head of the reset rotating shaft passes through the knob sleeve, and the reset rotating shaft is fixedly connected to the knob sleeve, the ratchet is arranged on the upper part of the reset knob, the ratchet comprises a plate-shaped ratchet base plate, the ratchet base plate is welded to the reset knob, and four driving columns are provided on the ratchet base plate. The pawl assembly comprises a pawl base plate, the pawl base plate is provided with a first base plate hole, a second base plate hole, a spring fixing column and a limiting column, the first base plate hole is fixedly connected to the brake steel plate of the hydraulic power pliers through a pawl screw, a pawl screw is provided in the second base plate hole, the pawl screw passes through the second base plate hole and is fixedly connected to the brake steel plate of the hydraulic power pliers, a rotatable long strip pawl is provided on the top of the pawl screw, a pawl center hole is provided in the middle of the pawl, a pawl side hole is provided on one side of the pawl center hole, the head of the pawl screw passes through the pawl center hole and is fixedly connected to the pawl nut, a spring fixing screw is provided in the pawl side hole, and a reset spring is provided between the fixing screw and the spring fixing column, The driving assembly comprises a cylinder assembly, the head of the piston rod of the cylinder assembly is provided with a driving hinge seat, and the driving hinge seat is provided with a rotatable pushing block.

[0007] As a preferred embodiment of the present invention, the driving hinge seat includes a pair of first hinge circles, the pushing block includes a plate-shaped pushing plate, a pair of second hinge circles are provided on the inner side of the pushing plate, the second hinge circle is connected to the first hinge circle through a connecting pin, and the connecting pin is provided with a pushing torsion spring and a pushing pin.

[0008] As a preferred embodiment of the present invention, the driving assembly also includes a first adjusting bracket, a second adjusting bracket and a third bracket, the cylinder assembly is arranged on the third bracket, the first adjusting bracket is provided with a first adjusting mounting slot, the second adjusting bracket is provided with a second adjusting mounting slot, and the third bracket is provided with a third adjusting mounting slot.

[0009] As a preferred embodiment of the present invention, the automatic reversing device for the main tongs of the hydraulic power tongs further comprises a sensor assembly, and the sensor assembly is used to monitor the position of the reset knob.

[0010] As a preferred embodiment of the present invention, the sensor assembly includes a sensor mounting bracket, on which a pair of sensing probes are provided, and on the side walls of the ratchet substrate, a pair of positioning screws are provided, and the positioning screws cooperate with the sensing probes.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an automatic reversing device for the main tongs of a hydraulic power tong, which does not require any changes to the internal structure of the original hydraulic power tongs, and does not affect the manual switching of the make-up and make-out operations of the main tongs. The conversion device can realize remote switching of the make-up and make-out states of the main tongs of the hydraulic power tongs, and there is no need to manually turn the reset knob during the use of the minor repair automation equipment, thereby improving the automation level of the equipment, reducing the safety risks of personnel working at the wellhead, and significantly improving the operating efficiency in the automatic installation of plug valves or automatic sand flushing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the scheme of the present invention, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the automatic reversing device of the main tongs of the hydraulic power tongs of the present invention; Figure 2 for Figure 1 A schematic diagram of the exploded three-dimensional structure of the automatic reversing device of the main tongs of the hydraulic power tongs; Figure 3 for Figure 1 A three-dimensional structural schematic diagram of a ratchet assembly of an automatic reversing device of a main tong of a hydraulic power tong; Figure 4 for Figure 3 A schematic diagram of a three-dimensional structure decomposition of a ratchet assembly; Figure 5 for Figure 1 A three-dimensional structural schematic diagram of a pawl assembly of an automatic reversing device of a main tong of a hydraulic power tong; Figure 6 for Figure 5 A schematic diagram of a three-dimensional structure decomposition of a pawl assembly; Figure 7 for Figure 1 A three-dimensional structural diagram of a driving assembly of an automatic reversing device for a main tong of a hydraulic power tong; Figure 8 for Figure 7 A schematic diagram of the three-dimensional structure of the cylinder assembly of the driving assembly; Fig. 9 for Figure 8 A detailed enlarged schematic diagram of area A in FIG. Fig.10 This is a schematic diagram of the operation of the automatic reversing device for the main tongs of the hydraulic power tongs of the present invention, at which time the cylinder assembly is not started; Fig.11 for Fig.10A detailed enlarged schematic diagram of area B in FIG. Fig.12 This is a schematic diagram of the operation of the automatic reversing device for the main tongs of the hydraulic power tongs of the present invention. At this time, the cylinder assembly is started; Fig.13 for Fig.12 A detailed enlarged schematic diagram of the C region in FIG. Fig.14 It is a schematic diagram of the operation of the cylinder assembly of the present invention; Fig.15 for Fig.14 A detailed enlarged schematic diagram of the D region in FIG. Fig.16 A schematic diagram of the structure of another embodiment of the present invention; Fig.17 for Fig.16 A detailed enlarged schematic diagram of area E in FIG. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0015] like Figure 1 and Figure 2 As shown, the automatic reversing device of the main tongs of the hydraulic power tongs comprises a ratchet assembly S1, a pawl assembly S2 and a driving assembly S3. The driving assembly S3 drives the ratchet assembly S1 to rotate. The pawl assembly S2 cooperates with the ratchet assembly S1 and causes the ratchet assembly S1 to rotate in one direction.

[0016] like Figure 3 and Figure 4 As shown, the ratchet assembly S1 includes a positioning seat 3, a positioning center hole 31 is provided at the center of the positioning seat 3, positioning seat fixing holes 32 are provided on both sides of the positioning seat 3, and the positioning seat fixing hole 32 is fixedly connected to the brake steel plate 11 of the hydraulic power pliers through the positioning seat screw 6. A rotatable reset rotation shaft 2 is provided in the positioning center hole 31, and a reset knob 4 is provided on the top of the reset rotation shaft 2. The reset knob 4 includes a long strip of knob body 41, and an annular knob sleeve 42 is provided at the center of the knob body 41. The head of the reset rotation shaft 2 passes through the knob sleeve 42, and the reset rotation shaft 2 is fixedly connected to the knob sleeve 42. A ratchet 5 is provided on the upper part of the reset knob 4, and the ratchet 5 includes a plate-shaped ratchet base plate 51, and the ratchet base plate 51 is welded to the reset knob 4, and four driving columns 52 are provided on the ratchet base plate 51.

[0017] It should be noted that a sleeve pin hole 421 is provided on the outer wall of the knob sleeve 42, and a reset rotation shaft pin hole 211 is provided on the top of the reset rotation shaft 2. The reset rotation shaft pin hole 211 is connected to the sleeve pin hole 421 through a pin, thereby realizing the synchronous rotation of the reset rotation shaft 2 and the reset knob 4.

[0018] like Figure 5 and Figure 6 As shown, the pawl assembly S2 includes a pawl substrate 20, on which a first substrate hole 204, a second substrate hole 201, a spring fixing column 202 and a limit column 203 are provided. The first substrate hole 204 is fixedly connected to the brake steel plate 11 of the hydraulic power tongs through a pawl screw 50. A pawl screw 40 is provided in the second substrate hole 201. The pawl screw 40 passes through the second substrate hole 201 and is fixedly connected to the brake steel plate 11 of the hydraulic power tongs. A rotatable long strip pawl 30 is provided on the top of the pawl screw 40. A pawl center hole 301 is provided in the middle of the pawl 30. A pawl side hole 302 is provided on one side of the pawl center hole 301. The head of the pawl screw 40 passes through the pawl center hole 301 and is fixedly connected to the pawl nut 80. A spring fixing screw 60 is provided in the pawl side hole 302. A reset spring 70 is provided between the fixing screw 60 and the spring fixing column 202.

[0019] like Figures 7 to 9 As shown, the driving assembly S3 comprises a first adjusting bracket 200, a second adjusting bracket 300 and a third bracket 400, and the third bracket 400 is provided with a cylinder assembly 500. The first adjusting bracket 200 is fixed to the main tong housing of the hydraulic power tongs by means of a screw.

[0020] The head of the piston rod of the cylinder assembly 500 is provided with a driving hinge seat 501, and a rotatable pushing block 502 is provided on the driving hinge seat 501. The driving hinge seat 501 includes a pair of first hinge circles 5011, and the pushing block 502 includes a plate-shaped pushing plate 5021. The inner side of the pushing plate 5021 is provided with a pair of second hinge circles 5022. The second hinge circle 5022 is connected to the first hinge circle 5011 by a connecting pin 503, and the connecting pin 503 is provided with a pushing torsion spring 504 and a pushing latch 505.

[0021] It should be noted that the drive assembly S3 is remotely controlled via a pneumatic pipeline. In addition, the piston rod of the cylinder assembly 500 is hexagonal, so that the piston rod will not rotate circumferentially in the cylinder.

[0022] The working mode of the automatic reversing device of the main tongs of the hydraulic power tongs is described below. For the convenience of description, the driving column 52A and the driving column 52B are marked respectively.

[0023] like Fig.10 and Fig.11 As shown, in a normal state, the cylinder assembly 500 is in a retracted state.

[0024] like Fig.12 and Fig.13 As shown, when it is necessary to switch the direction of make-up and make-off, the hydraulic power tongs of the minor repair automation device have automatically aligned the opening, that is, the opening of the main tong jaw frame is aligned with the opening of the main tong large gear, and the opening of the main tong large gear is aligned with the opening of the main tong housing. The cylinder assembly 500 is started, and the push block 502 begins to contact the drive column 52A. The piston rod continues to push out, and the push block 502 pushes the drive column 52A, so that the entire ratchet base plate 51 rotates 90° counterclockwise along the direction F1. During the counterclockwise rotation of the ratchet base plate 51, the drive column 52B contacts the pawl 30 and squeezes the pawl 30, so that the pawl 30 rotates clockwise at a small angle along the direction F2, and at the same time, the reset spring 70 is stretched. When the drive column 52B slides over the pawl 30 and breaks away from the contact with the pawl 30, under the action of the reset spring 70, the pawl 30 is quickly reset and presses against the limit column 203 again.

[0025] Then, the piston rod of the cylinder assembly 500 is retracted, and the above-mentioned action is repeated, the push block 502 pushes the driving column 52B, and the ratchet base plate 51 rotates 90° counterclockwise along the direction F1. At this time, the entire ratchet base plate 51 rotates 180°.

[0026] Since the ratchet base plate 51 synchronously drives the reset knob 4 and the reset rotating shaft 2, the reset knob 4 also rotates 180 degrees. Therefore, through the two telescopic actions of the cylinder assembly 500, the reset knob 4 can be rotated 180 degrees, thereby achieving the purpose of switching the direction of buckling and unbuckling.

[0027] It should be noted that if Fig.14 and Fig.15 As shown, during the retraction of the piston rod, the push block 502 will flip up, so the push block 502 will not be blocked by the drive column 52B. After the piston rod is retracted, the entire drive assembly S3 is not within the rotation range of the main pliers rotating component, and the drive assembly S3 does not affect the main pliers buckling and shackle.

[0028] like Fig.16 and 17 FIG. 2 is another embodiment of the present invention.

[0029] The automatic reversing device for the main tongs of the hydraulic power tongs further comprises a sensor assembly 33, and the sensor assembly 33 is arranged on the tongs head cover.

[0030] The sensor assembly 33 is used to monitor the position of the reset knob 4. In this way, the make-up and make-down status of the hydraulic pliers can be automatically identified, and this signal can be written into the control program of the minor repair automation equipment, so that the automatic installation of the plug valve and the automatic sand flushing operation are more intelligent and the process switching is smoother. Specifically, the sensor assembly 33 includes a sensor mounting bracket 331, on which a pair of induction probes 332 are provided, and a pair of positioning screws 53 are provided on the side wall of the ratchet base plate 51, and the positioning screws 53 cooperate with the induction probes 332.

[0031] The automatic reversing device for the main tongs of the hydraulic power tongs does not need to change the internal structure of the original hydraulic power tongs, and does not affect the manual conversion of the main tongs. The conversion device can realize the remote switching of the main tongs of the hydraulic power tongs. There is no need to manually turn the reset knob during the use of the minor repair automation equipment, which improves the automation level of the equipment, reduces the safety risks of personnel working at the wellhead, and can significantly improve the operation efficiency in the automatic installation of the plug valve or automatic sand flushing operations.

[0032] Without limitation to this, any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A hydraulic power tongs main tongs automatic reversing device, characterized in that: The hydraulic power tongs main tongs automatic reversing device comprises a ratchet assembly (S1), a pawl assembly (S2) and a drive assembly (S3). The ratchet assembly (S1) comprises a ratchet (5) and a reset rotation shaft (2), and the driving assembly (S3) drives the ratchet (5) and the reset rotation shaft (2) to rotate synchronously. The pawl assembly (S2) cooperates with the ratchet wheel (5) and causes the ratchet wheel (5) to rotate in one direction.

2. The automatic reversing device for the main tongs of the hydraulic power tongs according to claim 1 is characterized in that: The driving component (S3) is a pneumatic component.

3. The automatic reversing device for the main tongs of the hydraulic power tongs according to claim 1 is characterized in that: The ratchet assembly (S1) comprises a positioning seat (3), a positioning center hole (31) is provided at the center of the positioning seat (3), positioning seat fixing holes (32) are provided on both sides of the positioning seat (3), the positioning seat fixing holes (32) are fixedly connected to the brake steel plate (11) of the hydraulic power pliers through positioning seat screws (6), the reset rotation shaft (2) is rotatably arranged in the positioning center hole (31), a reset knob (4) is provided on the top of the reset rotation shaft (2), the reset knob (4) comprises a long strip-shaped knob body (41), a ring-shaped knob sleeve (42) is provided at the center of the knob body (41), and the knob sleeve (42) A sleeve pin hole (421) is provided on the side wall of the reset rotary shaft (2); a reset rotary shaft pin hole (211) is provided on the top of the reset rotary shaft (2); the reset rotary shaft pin hole (211) and the sleeve pin hole (421) are connected via a latch; the head of the reset rotary shaft (2) passes through the knob sleeve (42); and the reset rotary shaft (2) and the knob sleeve (42) are fixedly connected; the ratchet (5) is arranged on the upper part of the reset knob (4); the ratchet (5) comprises a plate-shaped ratchet base plate (51); the ratchet base plate (51) is welded to the reset knob (4); and four driving columns (52) are provided on the ratchet base plate (51). The ratchet assembly (S2) comprises a ratchet base plate (20), the ratchet base plate (20) being provided with a first base plate hole (204), a second base plate hole (201), a spring fixing column (202) and a limiting column (203), the first base plate hole (204) being fixedly connected to a brake steel plate (11) of a hydraulic power tongs via a ratchet screw (50), the second base plate hole (201) being provided with a ratchet screw (40), the ratchet screw (40) passing through the second base plate hole (201) and being fixedly connected to the brake steel plate (11) of the hydraulic power tongs The top of the ratchet screw (40) is provided with a rotatable strip-shaped ratchet (30), the middle of the ratchet (30) is provided with a ratchet center hole (301), one side of the ratchet center hole (301) is provided with a ratchet side hole (302), the head of the ratchet screw (40) passes through the ratchet center hole (301) and is fixedly connected to the ratchet nut (80), a spring fixing screw (60) is provided in the ratchet side hole (302), and a return spring (70) is provided between the fixing screw (60) and the spring fixing column (202), The driving assembly (S3) comprises a cylinder assembly (500), the head of the piston rod of the cylinder assembly (500) is provided with a driving hinge seat (501), and the driving hinge seat (501) is provided with a rotatable pushing block (502).

4. The automatic reversing device for the main tongs of the hydraulic power tongs according to claim 3 is characterized in that: The driving hinge seat (501) includes a pair of first hinge rings (5011), the pushing block (502) includes a plate-shaped pushing plate (5021), a pair of second hinge rings (5022) are provided on the inner side of the pushing plate (5021), the second hinge ring (5022) is connected to the first hinge ring (5011) via a connecting pin (503), and the connecting pin (503) is provided with a pushing torsion spring (504) and a pushing latch (505).

5. The automatic reversing device for the main tongs of the hydraulic power tongs according to claim 3 is characterized in that: The driving assembly (S3) further comprises a first adjustment bracket (200), a second adjustment bracket (300) and a third bracket (400); the cylinder assembly (500) is arranged on the third bracket (400); the first adjustment bracket (200) is provided with a first adjustment mounting notch (2001); the second adjustment bracket (300) is provided with a second adjustment mounting notch (3001); and the third bracket (400) is provided with a third adjustment mounting notch (5001).

6. The automatic reversing device for the main tongs of the hydraulic power tongs according to claim 3 is characterized in that: The hydraulic power tongs main tongs automatic reversing device further comprises a sensor assembly (33), wherein the sensor assembly (33) is used to monitor the position of the reset knob (4).

7. The automatic reversing device for the main tongs of the hydraulic power tongs according to claim 6 is characterized in that: The sensor assembly (33) comprises a sensor mounting bracket (331), a pair of sensing probes (332) are provided on the sensor mounting bracket (331), and a pair of positioning screws (53) are provided on the side wall of the ratchet base plate (51), and the positioning screws (53) cooperate with the sensing probes (332).

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