Automatic reversing mechanism of hydraulic clamp

Abstract

The utility model relates to an automatic reversing mechanism of a hydraulic clamp. The automatic reversing mechanism comprises a knob assembly and a driving assembly, the knob assembly comprises a reset knob shaft and a first gear, the reset knob shaft is rotationally arranged on a tong head rotating body of the hydraulic tong, and the first gear is arranged on the upper section of the reset knob shaft; the driving assembly comprises a mounting shell, a swing cylinder and a second gear, the mounting shell is arranged on a tong head body of the hydraulic tong, the second gear is rotationally arranged in the mounting shell, and a toothed part of the second gear can rotate out of the mounting shell and can be meshed with the first gear without obstacles; the swing cylinder is arranged on the upper portion of the installation shell, an output shaft of the swing cylinder is in driving connection with the second gear, and the swing cylinder can drive the knob assembly to rotate in the first direction through the second gear to conduct reversing action or drive the knob assembly to rotate in the second direction to reset. According to the automatic reversing mechanism for the hydraulic tongs, the screwing-on state and the screwing-off state of the hydraulic tongs can be automatically switched, and the working efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield pipe power tongs technical field especially relates to a hydraulic tong automatic reversing mechanism. BACKGROUND

[0002] With the improvement of the automation level of oil drilling operation, the automatic operation equipment (such as top drive, iron driller, drilling platform mechanical hand, etc.) is more and more widely applied. At present, the large and small repair automation equipment has been widely applied in various oilfields, and the hydraulic power tongs have realized automatic gear shifting, automatic make and break, automatic opening and closing, and automatic advancing and retreating. However, when making and breaking are reversed, most of the hydraulic power tongs are usually manually rotated by 180° to realize the reset knob.

[0003] Chinese patent document CN216477201U discloses an automatic reversing device for making and breaking, which comprises a knob assembly and a driving mechanism. The knob assembly comprises a knob, and the driving mechanism comprises a fixed seat, a telescopic assembly and an action plate. One end of the telescopic assembly is rotationally connected with the fixed seat, and the other end of the telescopic assembly is connected with the action plate. The telescopic assembly is adapted to extend and rotate relative to the fixed seat to drive the action plate to push the knob to perform a reversing action. The telescopic assembly is adapted to retract and rotate relative to the fixed seat to drive the action plate to reset. The driving mechanism is arranged on the tong head body of the main tong. The knob assembly further comprises a mounting plate arranged on the tong head rotating body of the main tong, and the knob is arranged on the mounting plate. When the telescopic assembly is in the retracted state, the action plate and the mounting plate have a spacing in the axial direction of the telescopic assembly. The automatic reversing device for making and breaking has the defects and deficiencies that the mechanical structure is relatively complex, the operation degree is relatively low, the positioning accuracy is poor, and the execution efficiency is relatively low. UTILITY MODEL CONTENTS

[0004] (I) Technical problem to be solved

[0005] In view of the above-mentioned defects and deficiencies of the prior art, the utility model provides a hydraulic tong automatic reversing mechanism, which solves the technical problems of the existing hydraulic tong automatic reversing mechanism, such as complex structure, low operation degree, poor positioning accuracy and low execution efficiency.

[0006] (II) Technical scheme

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the main technical scheme comprising:

[0008] The utility model embodiment provides a hydraulic tong automatic reversing mechanism, which comprises a knob assembly and a driving assembly.

[0009] The knob assembly comprises a reset knob shaft and a first gear, the reset knob shaft is rotationally arranged on the tong head rotating body of the hydraulic tong, and the first gear is arranged on the upper segment of the reset knob shaft.

[0010] The drive assembly includes a mounting housing, a swing cylinder, and a second gear. The mounting housing is mounted on the jaw body of the hydraulic clamp, and the second gear is rotatably mounted inside the mounting housing. A toothed portion is provided on a part of the side of the second gear, which can rotate out of the mounting housing and mesh with the first gear without obstruction.

[0011] The swing cylinder is located on the upper part of the mounting housing. The output shaft of the swing cylinder is connected to the second gear drive. The swing cylinder can drive the knob assembly to rotate in the first direction to perform a reversing action, or drive the knob assembly to rotate in the second direction to perform a reset action.

[0012] Optionally, another part of the second gear has a toothless portion: when the second gear rotates to the point where the toothed portion faces the first gear, the toothed portion meshes with the first gear and drives the first gear to rotate; when the second gear rotates to the point where the toothless portion faces the first gear, there is a gap between the toothless portion and the first gear.

[0013] Optionally, the side of the second gear is divided into four circumferential sections, two of which are toothed and the other two are toothless.

[0014] Optionally, the side of the second gear is divided into two parts along the circumference, one part being a toothed part and the other part being a toothless part.

[0015] Optionally, the drive assembly also includes a bearing cap, a bearing, and a gear shaft;

[0016] The mounting housing is provided with two bearing caps spaced apart in the vertical direction, and each bearing cap contains a bearing.

[0017] Both ends of the gear shaft pass through bearings, which form a rotational support for the gear shaft. The output shaft of the swing cylinder is connected to the upper end of the gear shaft, and a second gear is fixedly sleeved in the middle of the gear shaft.

[0018] Optionally, the drive assembly also includes a swing cylinder connecting plate;

[0019] A swing cylinder connecting plate is fixedly installed on the upper surface of the bearing cover located at the top of the mounting housing, and a swing cylinder is installed on the swing cylinder connecting plate.

[0020] Optionally, the drive component also includes a protective cover;

[0021] The protective cover is installed around the swing cylinder, and the lower end of the protective cover is connected to the mounting housing.

[0022] Optionally, the knob assembly also includes a knob, which is fixedly mounted on the upper end of the reset knob shaft.

[0023] Optionally, the swing cylinder can be a pneumatic swing cylinder, a hydraulic swing cylinder, or an electric swing cylinder.

[0024] (III) Beneficial Effects

[0025] The beneficial effects of this utility model are as follows: The hydraulic clamp automatic reversing mechanism of this utility model includes a knob assembly and a drive assembly; the knob assembly includes a reset knob shaft and a first gear, the reset knob shaft is rotatably mounted on the clamp head rotating body of the hydraulic clamp, and the first gear is mounted on the upper section of the reset knob shaft; the drive assembly includes a mounting housing, a swing cylinder, and a second gear, the mounting housing is mounted on the clamp head body of the hydraulic clamp, the second gear is rotatably mounted inside the mounting housing, and a toothed portion is provided on a part of the side of the second gear, which can rotate out of the mounting housing and mesh with the first gear without obstruction; the swing cylinder is mounted on the upper part of the mounting housing, and the output shaft of the swing cylinder is drivenly connected to the second gear, the swing cylinder can drive the knob assembly to rotate in a first direction to perform a reversing action, or drive the knob assembly to rotate in a second direction to perform a reset action. Compared to existing automatic reversing devices for upper and lower buckles, this device drives the second gear to rotate via a swing cylinder, causing the second gear to mesh with the first gear and drive the first gear to rotate. This, in turn, drives the reset knob shaft on the rotary hydraulic clamp to rotate and complete the reversing operation. This simplifies the structure, makes it easier to operate, and improves positioning accuracy and execution efficiency. Attached Figure Description

[0026] Figure 1 This is a front view schematic diagram of Embodiment 1 of the hydraulic clamp automatic reversing mechanism of this utility model when it is installed on a hydraulic clamp;

[0027] Figure 2 for Figure 1 A three-dimensional schematic diagram of the driving components in the diagram;

[0028] Figure 3 for Figure 2 A schematic diagram of the internal structure of the driving component in the diagram;

[0029] Figure 4 This is a schematic diagram of the engagement of the first and second gears in Embodiment 1 of the hydraulic clamp automatic reversing mechanism of this utility model;

[0030] Figure 5 This is a three-dimensional schematic diagram of the first gear in Embodiment 1 of the hydraulic clamp automatic reversing mechanism of this utility model;

[0031] Figure 6 This is a three-dimensional schematic diagram of the second gear in Embodiment 1 of the hydraulic clamp automatic reversing mechanism of this utility model.

[0032] [Explanation of Labels in the Attached Image]

[0033] 10: Knob assembly; 11: Reset knob shaft; 12: First gear;

[0034] 20: Drive assembly; 21: Mounting housing; 22: Swing cylinder; 23: Second gear; 231: Toothed part; 232: Toothless part; 24: Swing cylinder connecting plate; 25: Protective cover; 26: Bearing cover; 27: Bearing; 28: Gear shaft;

[0035] 30: Hydraulic clamps; 31: Clamp head body; 32: Clamp head rotating body. Detailed Implementation

[0036] To better explain and facilitate understanding of this utility model, a detailed description of its specific embodiments is provided below with reference to the accompanying drawings. In this document, directional terms such as "upper," "lower," "left," "right," "front," and "rear" are used interchangeably with other directional terms. Figure 1 The orientation is used as a reference.

[0037] Example 1:

[0038] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 This embodiment provides an automated reversing mechanism for hydraulic clamps, including a knob assembly 10 and a drive assembly 20.

[0039] The knob assembly 10 includes a reset knob shaft 11 and a first gear 12. The reset knob shaft 11 is rotatably mounted on the jaw rotating body 32 of the hydraulic clamp 30, and the first gear 12 is located on the upper section of the reset knob shaft 11.

[0040] The drive assembly 20 includes a mounting housing 21, a swing cylinder 22, and a second gear 23. The mounting housing 21 is disposed on the jaw body 31 of the hydraulic clamp 30. The second gear 23 is rotatably disposed inside the mounting housing 21. A toothed portion 231 is provided on a portion of the side of the second gear 23. The toothed portion 231 can rotate out of the mounting housing 21 and can mesh with the first gear 12 without obstruction.

[0041] The swing cylinder 22 is located on the upper part of the mounting housing 21. The output shaft of the swing cylinder 22 is driven and connected to the second gear 23. The swing cylinder 22 can drive the knob assembly 10 to rotate in the first direction to perform a reversing action through the second gear 23, or drive the knob assembly 10 to rotate in the second direction to reset.

[0042] It should be noted that the first gear 12 can be connected to the reset knob shaft 11 on the pliers head rotating body 32 via a keyway. The first gear 12 and the reset knob shaft 32 are axially fixed by a gear cover. The first gear 12 and the reset knob shaft 11 can rotate together via a key connection. Furthermore, the mounting housing 21 serves as the main frame of the hydraulic pliers automatic reversing mechanism, connecting and supporting other structural assemblies. The mounting housing 21 has a reserved mounting interface, allowing for combined installation with external equipment, ensuring the independence and integrity of the hydraulic pliers automatic reversing mechanism.

[0043] The automated hydraulic clamp reversing mechanism of this embodiment requires no changes to the internal structure of the hydraulic clamp 30. It can automatically switch the upper and lower states of the hydraulic clamp 30, and no manual rotation of the reset knob is required during use. This improves the automation level of the hydraulic clamp 30, reduces the safety risks for personnel working at the wellhead, and significantly improves work efficiency in automated equipment operations. In addition, compared with existing automatic upper and lower clamp reversing devices, it simplifies the structure, is easier to operate, and improves positioning accuracy and execution efficiency.

[0044] Preferably, in this embodiment, another part of the side of the second gear 23 is provided with a toothless portion 232. That is, the side of the second gear 23 is divided into a toothed portion 231 and a toothless portion 232 along the circumference: when the second gear 23 rotates to the position where the toothed portion 231 faces the first gear 12, the toothed portion 231 meshes with the first gear 12 and drives the first gear 12 to rotate; when the second gear 23 rotates to the position where the toothless portion 232 faces the first gear 12, there is a gap between the toothless portion 232 and the first gear 12. It should be noted that when the main oil drilling equipment is working, the first gear 12 moves accordingly. To avoid interference between the first gear 12 and the second gear 23, the side of the second gear 23 is provided with a toothless portion 232, and there is a gap between the toothless portion 232 and the first gear 12; there is no connection between the two.

[0045] See Figure 6 In this embodiment, the side of the second gear 23 is divided into four circumferential parts, two of which are toothed portions 231 and the other two are toothless portions 232. Specifically, the toothless portions 232 of the second gear 23 have no teeth, while the toothed portions 231 of the second gear 23 are covered with teeth. The number of teeth in each toothed portion 231 corresponds to the angle through which the first gear 12 rotates. When the second gear 23 rotates 180 degrees, the first gear 12 also rotates 180 degrees through the meshing of the corresponding number of teeth.

[0046] When the hydraulic clamp 30 needs to reverse direction, the first gear 12 is in the standby position. The swing cylinder 22 drives the second gear 23 to rotate. After passing the toothless section 232, the toothed section 231 begins to mesh with the first gear 12. At this time, the first gear 12 and the second gear 23 rotate together, and the toothed section 231 causes the first gear 12 to rotate exactly 180 degrees. When the swing cylinder 22 continues to rotate, it re-enters the toothless section 232, and the first gear 12 disengages from the second gear 23. At this time, the first gear 12 has rotated exactly 180 degrees, and the equipment completes the reversing action.

[0047] Preferably, the drive assembly 20 further includes bearing caps 26, bearings 27, and a gear shaft 28. Two bearing caps 26 are spaced apart vertically on the mounting housing 21, and each bearing cap 26 contains a bearing 27. Both ends of the gear shaft 28 pass through the bearings 27, which provide rotational support for the gear shaft 28. The output shaft end of the swing cylinder 22 is connected to the upper end of the gear shaft 28, and a second gear 23 is fixedly fitted onto the middle of the gear shaft 28.

[0048] It should be noted that the gear shaft 28 and the second gear 23 are connected by a key. The output shaft of the swing cylinder 22 is provided with a first mounting keyway, which cooperates with the second mounting keyway on the gear shaft 28 for installation. The swing cylinder 22 drives the gear shaft 28 to rotate through the key connection, thereby driving the second gear 23 to rotate.

[0049] Preferably, the drive assembly 20 further includes a swing cylinder connecting plate 24. The swing cylinder connecting plate 24 is fixedly mounted on the upper surface of the bearing cover 26 located on the upper part of the mounting housing 21, and the swing cylinder 22 is mounted on the swing cylinder connecting plate 24.

[0050] Preferably, the drive assembly 20 further includes a protective cover 25. The protective cover 25 is disposed around the periphery of the swing cylinder 22, and the lower end of the protective cover 25 is connected to the mounting housing 21. The purpose of providing the protective cover 25 is to protect the swing cylinder 22 and prevent external equipment from colliding with the swing cylinder 22.

[0051] In this embodiment, when the second gear 23 rotates to the position where the toothless portion 232 faces the first gear 12, there is a gap between the toothless portion 232 and the first gear 12, meaning that the second gear 23 is separated from the first gear 12. At this time, the operator can manually rotate the first gear 12 to change direction or reset. In other words, the automated reversing mechanism of the hydraulic clamp in this embodiment does not affect the manual switching operation of the hydraulic clamp 30.

[0052] Furthermore, the knob assembly 10 also includes a knob, which is fixedly mounted on the upper end of the reset knob shaft 11. The purpose of the knob is to facilitate manual rotation of the reset knob shaft 11 by the operator.

[0053] Preferably, the swing cylinder 22 is a pneumatic swing cylinder, a hydraulic swing cylinder, or an electric swing cylinder. When the swing cylinder 22 is an electric swing cylinder, the electric swing cylinder is preferably an explosion-proof stepper motor.

[0054] The working process of the hydraulic clamp automatic reversing mechanism in this embodiment is as follows:

[0055] When the hydraulic clamp 30 needs to change direction during operation, the first gear 12 needs to be returned to the neutral position first, and the hydraulic clamp 30 is in the reset state.

[0056] The swing cylinder 22 then begins to operate, driving the second gear 23 to rotate. After the second gear 23 rotates through a certain angle, its toothed portion 231 meshes with the teeth on the first gear 12. The swing cylinder 22 continues to rotate, and through the meshing of the gears, the reset knob shaft 11 on the hydraulic clamp 30 rotates. When the reset knob shaft 11 rotates 180 degrees, the second gear 23 disengages from the first gear 12, and the second gear 23 continues to rotate while the first gear 12 stops rotating.

[0057] When the swing cylinder rotates 180 degrees, the second gear 23 stops rotating and is in its initial position. At this time, the swing cylinder 22 stops rotating and is in standby mode. The equipment completes the reversing operation and waits for the next reversing operation to begin.

[0058] Example 2:

[0059] This embodiment provides another hydraulic clamp automatic reversing mechanism. Unlike embodiment 1, the side of the second gear 23 in this embodiment is divided into two parts along the circumference, one part being a toothed part 231 and the other part being a toothless part 232.

[0060] The remaining parts that are the same as in Example 1 will not be repeated here.

[0061] In the description of this utility model, 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 utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0062] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0063] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" 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," and "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.

[0064] 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.

[0065] 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. An automated reversing mechanism for hydraulic clamps, characterized in that: Includes a knob assembly (10) and a drive assembly (20); The knob assembly (10) includes a reset knob shaft (11) and a first gear (12). The reset knob shaft (11) is rotatably mounted on the jaw rotating body (32) of the hydraulic clamp (30), and the first gear (12) is located on the upper section of the reset knob shaft (11). The drive assembly (20) includes a mounting housing (21), a swing cylinder (22), and a second gear (23). The mounting housing (21) is disposed on the jaw body (31) of the hydraulic clamp (30). The second gear (23) is rotatably disposed inside the mounting housing (21). A toothed portion (231) is provided on a part of the side of the second gear (23). The toothed portion (231) can rotate out of the mounting housing (21) and can mesh with the first gear (12) without obstruction. The swing cylinder (22) is located on the upper part of the mounting housing (21). The output shaft of the swing cylinder (22) is driven and connected to the second gear (23). The swing cylinder (22) can drive the knob assembly (10) to rotate in the first direction to perform a reversing action through the second gear (23), or drive the knob assembly (10) to rotate in the second direction to perform a reset.

2. The hydraulic clamp automatic reversing mechanism as described in claim 1, characterized in that: Another part of the second gear (23) has a toothless part (232) on its side: when the second gear (23) rotates to the point where the toothed part (231) faces the first gear (12), the toothed part (231) meshes with the first gear (12) and pushes the first gear (12) to rotate; when the second gear (23) rotates to the point where the toothless part (232) faces the first gear (12), there is a gap between the toothless part (232) and the first gear (12).

3. The hydraulic clamp automatic reversing mechanism as described in claim 2, characterized in that: The side of the second gear (23) is divided into four parts along the circumference, of which two opposite parts are toothed (231) and the other two opposite parts are toothless (232).

4. The hydraulic clamp automatic reversing mechanism as described in claim 2, characterized in that: The side of the second gear (23) is divided into two parts along the circumference, one part being a toothed part (231) and the other part being a toothless part (232).

5. The hydraulic clamp automatic reversing mechanism as described in claim 1, characterized in that: The drive assembly (20) also includes a bearing cap (26), a bearing (27), and a gear shaft (28); The mounting housing (21) is provided with two bearing caps (26) spaced apart in the vertical direction, and a bearing (27) is provided inside each of the two bearing caps (26); The two ends of the gear shaft (28) pass through the bearing (27) and the bearing (27) forms a rotational support for the gear shaft (28). The output shaft end of the swing cylinder (22) is connected to the upper end of the gear shaft (28). The second gear (23) is fixedly sleeved in the middle of the gear shaft (28).

6. The hydraulic clamp automatic reversing mechanism as described in claim 5, characterized in that: The drive assembly (20) also includes a swing cylinder connecting plate (24); A swing cylinder connecting plate (24) is fixedly installed on the upper surface of the bearing cover (26) located on the upper part of the mounting housing (21), and a swing cylinder (22) is installed on the swing cylinder connecting plate (24).

7. The hydraulic clamp automatic reversing mechanism as described in claim 6, characterized in that: The drive assembly (20) also includes a protective cover (25); The protective cover (25) is installed around the swing cylinder (22), and the lower end of the protective cover (25) is connected to the mounting housing (21).

8. The hydraulic clamp automatic reversing mechanism as described in claim 1, characterized in that: The knob assembly (10) also includes a knob, which is fixedly mounted on the upper end of the reset knob shaft (11).

9. The hydraulic clamp automatic reversing mechanism as described in claim 1, characterized in that: The swing cylinder (22) is a pneumatic swing cylinder, a hydraulic swing cylinder or an electric swing cylinder.

Images