Chain drive mechanism for satisfying large floating of dog in oil casing pre-screwing machine

Abstract

The utility model discloses a chain type drive mechanism that satisfies the big floatation of chuck in the petroleum casing pre -screwing machine belongs to petroleum casing processing equipment technical field, mechanism includes treater, conveying platform, kinetic energy mechanism, floating mechanism and hydraulic pressure mechanism, and floating mechanism sets up in conveying platform one side, including fixed sliding block and the floating plate of sliding connection in sliding block, and the one side of floating plate is connected with the mounting block away from conveying platform, and hydraulic pressure mechanism includes telescopic hydraulic column, and the output end drive mounting block of hydraulic column, and one spring is set up in the outside of hydraulic column, and spring sets up between mounting block and the body of hydraulic pressure mechanism. The utility model discloses a rigid drive of hydraulic column is combined with the elastic support of spring, and cooperates with the floating plate that can slide freely on the sliding block, has solved the problem that the floating range of existing clamping mechanism is small, and the self -adaptation ability is poor, has the advantages such as clamping stable and reliable, wide application range, can provide rigid and soft support for pre -screwing.

Description

Technical Field

[0001] This utility model relates to the technical field of oil casing processing equipment, and in particular to a chain transmission mechanism that allows for large floating of the chucks in an oil casing pre-tightening machine. Background Technology

[0002] Oil casing is a key component in the oil drilling process, used to support the wellbore and ensure the normal progress of the drilling process. Before going down into the well, an oil casing pre-tightening machine is usually used to connect multiple sections of casing. The pre-tightening machine clamps the casing and applies pre-tightening torque to ensure that the connection between the casings is firm and reliable.

[0003] Existing oil casing pre-tightening machines typically include a transmission mechanism for conveying the casing and a jaw clamping mechanism for fixing the casing. During operation, the transmission mechanism conveys the casing to a designated position, and then the jaw clamping mechanism moves to firmly fix the casing for pre-tightening. To ensure the reliability of clamping, the existing jaw mechanism is often designed to be relatively rigid, or only has a slight floating adjustment capability.

[0004] In actual production, the oil casings that need to be processed often have a variety of different specifications and outer diameters. When faced with casings of different diameters, the aforementioned rigid or slightly floating jaw mechanism exposes its inherent defects. Its limited stroke and adaptive range make it difficult to effectively fit and clamp all specifications of casings, which can easily lead to unstable clamping of some specifications of casings and fail to provide sufficient support for pre-tightening operations. This not only affects the quality of the pre-tightening connection, but may also damage the casing surface due to slippage, reducing the versatility of the equipment and the reliability of processing.

[0005] Therefore, this utility model proposes a chain transmission mechanism that allows for large floating of the chuck in an oil casing pre-tightening machine to address the shortcomings of existing technologies. Utility Model Content

[0006] In view of the problems in the existing oil casing pre-tightening machine, such as insufficient floating range and adaptive capability of the chuck clamping mechanism, making it difficult to stably clamp and effectively support casings of different specifications, this utility model aims to provide a chain transmission mechanism with improved structure that can effectively solve the above problems and meet the large floating of the chuck in the oil casing pre-tightening machine.

[0007] This utility model provides a chain transmission mechanism for large chuck floating in an oil casing pre-tightening machine, including a processing machine and a conveying platform fixedly installed on the processing machine; as well as a kinetic energy mechanism, a floating mechanism, a hydraulic mechanism, a mounting block and a spring.

[0008] The innovation of the mechanism lies in the synergistic structure between the floating mechanism, the hydraulic mechanism and the spring. The kinetic energy mechanism includes a chain conveyor belt that forms the conveying surface of the conveying platform. The floating mechanism is set on one side of the conveying path of the conveying platform and includes a slider that extends and is fixed along the length of the conveying platform, as well as a floating plate that is slidably connected to the slider. The hydraulic mechanism is installed on the processor.

[0009] Furthermore, the floating plate, mounting block, hydraulic mechanism, and spring are combined in the following way: a mounting block is fixedly connected to the side of the floating plate away from the conveying platform; the hydraulic mechanism includes a retractable hydraulic column, the output end of which reciprocates against the mounting block; the spring is sleeved on the outside of the hydraulic column, one end of which abuts against the mounting block, and the other end abuts against the fixed body of the hydraulic mechanism; the extension of the hydraulic column drives the floating plate to clamp, while compressing the spring to form elastic support.

[0010] Preferably, the kinetic energy mechanism also includes an input block, which is connected to an external power source and used to drive the chain conveyor belt in a cyclical motion. It provides a stable and continuous original power for the entire conveying process, ensuring that the steel pipe can be smoothly conveyed to the processing position.

[0011] Preferably, the kinetic energy mechanism also includes baffle one and baffle two, which are symmetrically fixed to the processor by hexagonal screws and located on both sides of the chain conveyor belt. Together, they form a physical guide channel for constraining the steel pipe, effectively ensuring the high straightness and positional accuracy of the steel pipe during the conveying process.

[0012] Preferably, the cylinder of the hydraulic mechanism has an oil inlet and an oil outlet for controlling the extension and retraction of the hydraulic column. By precisely controlling the oil in the inlet and outlet, the clamping and releasing actions of the floating plate can be automated and responded to quickly, thus improving the overall work efficiency.

[0013] Preferably, the hydraulic mechanism is also connected to a medium pressure regulating valve in the oil inlet circuit. As a pressure stabilizing unit, the medium pressure regulating valve can ensure that the oil pressure entering the hydraulic cylinder is constant, thereby keeping the clamping force of the floating plate on the steel pipe stable and avoiding clamping instability caused by pressure fluctuations.

[0014] Preferably, the hydraulic system is also equipped with a pressure reducing valve. As a safety device, the pressure reducing valve is used to release pressure when the system pressure rises abnormally. This can effectively prevent high pressure impact from damaging the hydraulic cylinder and other precision components, thereby improving the durability and safety of the equipment.

[0015] Preferably, the spring is a helical compression spring, and its axis is parallel to the direction of movement of the hydraulic column. This parallel arrangement ensures that the elastic support force generated by the spring can be applied evenly, avoiding uneven loading, thereby ensuring the stability of the floating plate in motion and clamping states.

[0016] Preferably, the slider is provided with a T-shaped guide groove extending along its length, and the floating plate is provided with a T-shaped slide table that slides in conjunction with the T-shaped guide groove. This T-shaped groove and table mating structure forms a high-precision sliding guide pair, which can resist overturning moment very well and ensure that the floating plate can still move smoothly and without shaking when subjected to huge clamping force.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problems of small floating range, poor adaptability, and difficulty in stably clamping sleeves of different specifications in the existing pre-tightening machine clamping mechanism by setting a floating mechanism that works in coordination with a floating plate, slider and spring, and driving the floating mechanism by a hydraulic mechanism. It achieves the technical effect of enabling the chuck to float over a wide range and adapt to steel pipes of different diameters, thereby significantly improving the clamping stability and processing applicability.

[0019] 2. This utility model solves the problem that existing transmission mechanisms are prone to slippage under heavy hydraulic conditions, resulting in unstable power transmission and easy deviation of steel pipe transportation by using a chain conveyor belt to transport steel pipes and forming guiding constraints with baffles on both sides. It achieves the technical effect of stable and reliable power source and accurate and non-deviation-prone steel pipe transportation, providing a stable guarantee for subsequent pre-tightening processing.

[0020] 3. This utility model combines the linear drive of the hydraulic column with the elastic support of the coaxially arranged spring, which work together on the floating plate. This solves the problem that traditional clamping devices cannot balance strong clamping force and elastic floating support. It achieves the technical effect of providing both strong clamping force and continuous elastic support force through the spring, making the entire clamping process both rigid and flexible. It not only clamps firmly but also has greater adaptability. Attached Figure Description

[0021] Figure 1 This utility model presents a schematic diagram of a chain transmission mechanism that allows for large floating of the chuck jaws in an oil casing pre-tightening machine.

[0022] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0023] Figure 3 This utility model presents a schematic diagram of the hydraulic mechanism of a chain transmission mechanism that allows for large floating of the chucks in an oil casing pre-tightening machine.

[0024] Figure 4 This invention presents a schematic diagram of the spring structure of a chain transmission mechanism that satisfies large floating of the chuck in an oil casing pre-tightening machine.

[0025] Legend:

[0026] 1. Processing machine; 2. Hydraulic mechanism; 201. Hydraulic column; 202. Oil inlet; 203. Oil outlet; 204. Medium pressure regulator; 205. Pressure reducing valve; 3. Floating mechanism; 301. Slider; 302. Mounting block; 303. Floating plate; 304. Spring; 4. Conveying platform; 5. Kinetic energy mechanism; 501. Baffle one; 502. Hexagonal screw; 503. Input block; 504. Chain conveyor belt; 505. Baffle two. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] Example:

[0029] Please refer to Figures 1 to 4 This utility model provides a chain transmission mechanism that allows for large floating of the jaws in an oil casing pre-tightening machine. It aims to solve the problems of insufficient floating range and adaptive capability of the clamping mechanism in existing oil casing pre-tightening machines when handling casings of different specifications, and the risk of slippage of the transmission mechanism under hydraulic heavy load conditions.

[0030] like Figure 1 As shown, a chain drive mechanism that satisfies large floating of the chuck in an oil casing pre-tightening machine includes a processing machine 1 and a conveying platform 4 fixedly installed on the processing machine 1. The processing machine 1 serves as the mounting base and control center of the entire mechanism, providing a stable mounting foundation for all other components. The conveying platform 4 is used to carry the steel pipe that needs to be pre-tightened.

[0031] The mechanism includes a kinetic energy mechanism 5, a floating mechanism 3, and a hydraulic mechanism 2, all mounted on the processor 1.

[0032] The kinetic energy mechanism 5 includes a chain conveyor belt 504 that forms the conveying surface of the conveying platform 4. The kinetic energy mechanism 5 is used to drive the chain conveyor belt 504 to circulate, thereby conveying the steel pipe along a preset path.

[0033] The floating mechanism 3 is set on one side of the conveying path of the conveying platform 4. Specifically, it includes a slider 301 that extends and is fixed along the length of the conveying platform 4, and a floating plate 303 that is slidably connected to the slider 301. The floating plate 303 is used to adaptively conform to the surface of steel pipes of different diameters during operation to achieve stable clamping.

[0034] The hydraulic mechanism 2 is installed on the processor 1 and serves as a drive source to drive the floating mechanism 3 to perform clamping and releasing actions;

[0035] In order to achieve precise transmission of driving force and floating function, the floating plate 303 has a mounting block 302 fixedly connected to the side surface away from the conveying platform 4. The hydraulic mechanism 2 includes a linearly telescopic hydraulic column 201. The output end of the hydraulic column 201 can reciprocate and abut against the mounting block 302, thereby directly transmitting the hydraulic thrust to the floating plate 303.

[0036] To achieve a wide range of floating and provide continuous support, the mechanism also includes a spring 304, which is sleeved on the outside of the hydraulic column 201. One end of the spring 304 abuts against the side of the mounting block 302 facing the hydraulic mechanism 2, and the other end abuts against the fixed body of the hydraulic mechanism 2. The spring 304 is compressed during the process of the hydraulic column 201 driving the floating plate 303 to clamp the steel pipe, thereby providing a stable and elastic support force for the pre-tightening shaft.

[0037] Please refer to Figure 1 and Figure 2 In addition to the chain conveyor belt 504, the kinetic energy mechanism 5 also includes an input block 503, as well as a symmetrically arranged baffle 1 501 and baffle 2 505. The input block 503 is connected to an external power source and forms a drive connection with the chain conveyor belt 504 to stably transmit external power to the chain conveyor belt 504, so that it generates cyclic motion, thereby providing continuous and reliable power for the axial conveying of the steel pipe.

[0038] The first baffle 501 and the second baffle 505 are long strips extending along the conveying direction of the chain conveyor belt 504. They are firmly fixed to the upper surface of the processor 1 by multiple hexagonal screws 502 and are located on both sides of the chain conveyor belt 504 respectively.

[0039] In the assembled state, the inner side of baffle 1 501 and the inner side of baffle 2 505 together form a guide channel for constraining the steel pipe, and the chain conveyor belt 504 is located at the bottom of the guide channel.

[0040] This structure, which combines chain-driven forced transmission with physical guidance constraints on both sides, ensures high straightness and positional accuracy of the steel pipe during transportation and effectively avoids slippage or deviation that may occur under subsequent heavy hydraulic conditions, thus guaranteeing the stable progress of the entire pre-tightening process.

[0041] As a preferred embodiment, in order to achieve precise driving and control of the floating mechanism 3, please refer to... Figure 3 The cylinder of the hydraulic mechanism 2 is specifically provided with an oil inlet 202 and an oil outlet 203 for controlling the extension and retraction of the hydraulic column 201. The processor 1 is electrically connected to the hydraulic valve group through an internally integrated control module, thereby accurately controlling the flow rate and timing of the hydraulic oil entering the oil inlet 202 and flowing out of the oil outlet 203, and realizing the automated control of the clamping and loosening action of the floating plate 303.

[0042] As a further optimization of the above hydraulic system, in order to ensure the continuous and stable hydraulic power, a medium pressure regulating valve 204 is connected in series in the oil inlet circuit of the hydraulic mechanism 2. The medium pressure regulating valve 204 is used to monitor and stabilize the hydraulic oil pressure entering the cylinder in real time, so as to ensure that the floating mechanism 3 can obtain a continuous and suitable hydraulic pressure regardless of the fluctuation of the external load, thereby ensuring the constant clamping force.

[0043] As a safety protection scheme for the above-mentioned hydraulic system, in order to avoid damage to components caused by abnormal system pressure, a pressure reducing valve 205 is connected in parallel in the oil circuit system of the hydraulic mechanism 2. The set pressure of the pressure reducing valve 205 is lower than the maximum safe pressure of the system. It is used to quickly release pressure when the system pressure rises abnormally for some reason, thereby effectively protecting the entire hydraulic mechanism 2 from overload and preventing high pressure impact from damaging the hydraulic cylinder or other precision components.

[0044] For specific structural limitations of the floating mechanism 3, please refer to Figure 4 The spring 304 is preferably a helical compression spring with high stiffness. Its axis is parallel to the movement direction of the hydraulic column 201 after installation. This coaxial or parallel layout ensures that the supporting force of the spring can be evenly applied to the mounting block 302 without generating an eccentric torque, thereby ensuring the stability and guidance of the floating plate 303 during the clamping process.

[0045] As a specific implementation of the guiding structure of the floating mechanism 3, the slider 301 is provided with a T-shaped guide groove extending along its length direction. Correspondingly, the floating plate 303 is provided with an integrally formed T-shaped slide table that slides in cooperation with the T-shaped guide groove. The T-shaped slide table is precisely embedded in the T-shaped guide groove. Together, they form a sliding pair with high rigidity and anti-overturning ability. The structure can precisely limit the floating plate 303 to reciprocate only in a direction perpendicular to the axis of the steel pipe.

[0046] Working principle: The processor 1 is the control center, controlling the start and stop of the kinetic energy mechanism 5 and the hydraulic mechanism 2. When starting, the kinetic energy mechanism 5 is driven first, and the input block 503 transmits power to the chain conveyor belt 504, so that the steel pipe on the conveying platform 4 is conveyed along the preset path. The baffles 1 and 2 on both sides are fixed to the processor 1 by hexagonal screws 502 to form a guiding constraint, ensuring that the steel pipe is not deviated during conveying. This can effectively avoid the drawback of slippage under heavy hydraulic pre-tightening, and provide a good and continuous stable guarantee for the power source of the pre-tightening machine. When the steel pipe reaches the pre-tightening position, the processor 1 sends a command to stop the kinetic energy mechanism 5 to fix the position of the steel pipe, and simultaneously drives the hydraulic mechanism 2. The hydraulic oil enters through the oil inlet 202 and pushes the hydraulic column 201 to extend linearly. The power is transmitted to the spring 304 through the mounting block 302. Because the diameter of the spring 304 has been increased by 3mm, it can achieve the required strength compared with existing products, ensuring the support force and floating function of the pre-tightening shaft when processing various steel pipe specifications.

[0047] Furthermore, the floating plate 303 of the floating mechanism 3 is guided along the slider 301 to approach the steel pipe. In conjunction with the slider 301, it can slide freely on the conveying platform 4, allowing the floating plate 303 to adaptively conform to the surface of the steel pipe, ensuring clamping stability. During this process, the pressure regulating valve 204 stabilizes the hydraulic system pressure, effectively controlling the required pressure and providing continuous and suitable hydraulic pressure for the hydraulic mechanism 2. The pressure reducing valve 205 reduces the local oil circuit pressure in the hydraulic mechanism 2, avoiding damage from high-pressure impact. After the pre-tightening is completed, the processor 1 receives a signal, the hydraulic oil flows back through the oil outlet 203, the hydraulic column 201 retracts, and at the same time, the kinetic energy mechanism 5 is restarted.

Claims

1. A chain drive mechanism for large chuck floating in an oil casing pre-tightening machine, comprising a processing machine (1) and a conveying platform (4) fixedly mounted on the processing machine (1), characterized in that, The mechanism also includes: a kinetic energy mechanism (5), which includes a chain conveyor belt (504) constituting the conveying surface of the conveying platform (4), and the kinetic energy mechanism (5) is used to drive the chain conveyor belt (504) to convey steel pipes; A floating mechanism (3) is disposed on one side of the conveying path of the conveying platform (4). The floating mechanism (3) includes a slider (301) extending and fixed along the length direction of the conveying platform (4), and a floating plate (303) slidably connected to the slider (301). The floating plate (303) is used to adaptively conform to the surface of the steel pipe. A hydraulic mechanism (2) is mounted on the processor (1) and is used to drive the floating mechanism (3). The floating plate (303) is away from the conveying platform. (4) is fixedly connected to one side of the mounting block (302). The hydraulic mechanism (2) includes a telescopic hydraulic column (201). The output end of the hydraulic column (201) reciprocates against the mounting block (302). The mechanism also includes a spring (304). The spring (304) is sleeved on the outside of the hydraulic column (201). One end of the spring abuts against the mounting block (302), and the other end abuts against the fixed body of the hydraulic mechanism (2). It is used to provide elastic support force when the hydraulic column (201) drives the floating plate (303).

2. The chain transmission mechanism for large chuck floating in an oil casing pre-tightening machine according to claim 1, characterized in that, The kinetic energy mechanism (5) also includes an input block (503), which is connected to an external power source and is used to drive the chain conveyor belt (504) to circulate, providing continuous power for the steel pipe conveying.

3. A chain transmission mechanism for large chuck floating in an oil casing pre-tightening machine according to claim 1 or 2, characterized in that, The kinetic energy mechanism (5) also includes a first baffle (501) and a second baffle (505). The first baffle (501) and the second baffle (505) are symmetrically fixed to the processor (1) by hexagonal screws (502) and are located on both sides of the chain conveyor belt (504) to form a guiding constraint.

4. A chain transmission mechanism for large chuck floating in an oil casing pre-tightening machine according to claim 1, characterized in that, The cylinder of the hydraulic mechanism (2) has an oil inlet (202) and an oil outlet (203) for controlling the extension and retraction of the hydraulic column (201), and the processor (1) controls the hydraulic oil entering the oil inlet (202) and flowing out of the oil outlet (203).

5. A chain transmission mechanism for large chuck floating in an oil casing pre-tightening machine according to claim 4, characterized in that, The hydraulic mechanism (2) is also connected to a medium pressure regulating valve (204) in the oil inlet circuit. The medium pressure regulating valve (204) is used to stabilize the hydraulic oil pressure entering the cylinder and provide continuous and suitable hydraulic pressure for the floating mechanism (3).

6. A chain transmission mechanism for large chuck floating in an oil casing pre-tightening machine according to claim 5, characterized in that, The hydraulic mechanism (2) is also connected to a pressure reducing valve (205) in its oil circuit system. The pressure reducing valve (205) is used to reduce the local oil circuit pressure when the system pressure is abnormal, so as to avoid high pressure impact damaging the hydraulic mechanism (2).

7. A chain transmission mechanism for large chuck floating in an oil casing pre-tightening machine according to claim 1, characterized in that, The spring (304) is a helical compression spring, and its axial direction is parallel to the movement direction of the hydraulic column (201), which ensures the stability and guidance of the supporting force.

8. A chain transmission mechanism for large chuck floating in an oil casing pre-tightening machine according to claim 1, characterized in that, The slider (301) is provided with a T-shaped guide groove extending along its length direction, and the floating plate (303) is provided with a T-shaped slide table that slides in cooperation with the T-shaped guide groove. Together, they form a sliding pair that limits the reciprocating motion of the floating plate (303).

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