Floating Clamping Device for Continuous Oil Pipe Injection Head
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Solution Overview
Problem
Existing clamping devices for continuous oil pipe injection heads have poor maintainability, are prone to wear, and suffer from uneven clamping forces, leading to damage and reduced flexibility due to their large size and inflexible pushing plate structure.
Innovation Solution
A floating clamping device with a supporting plate, a pin shaft connecting a pushing plate, clamping oil cylinders, and a clamping assembly featuring ceramic rollers and a spherical plain bearing, allowing the pushing plate to float and adapt to the continuous oil pipe's position, ensuring uniform clamping and preventing hard extrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an integral pushing plate with wheel bearings is used, then the clamping device can effectively clamp the continuous oil pipe, but the device becomes large in size and has poor maintainability
Solution Approach 1:
The patent removes the complex bearing assembly from the pushing plate, extracting only the essential clamping function. The pushing plate becomes a simple structural component that guides the clamping blocks without requiring bearings, thereby reducing device size and improving maintainability while preserving clamping effectiveness.
Solution Approach 2:
The clamping device is segmented into independent clamping blocks that can move separately along the pushing plate. This segmentation allows each clamping block to independently adjust to the oil pipe position, maintaining effective clamping without requiring a complex integrated bearing system on the pushing plate.
2Stability of the object's composition
If the pushing plate is rigidly fixed to the supporting plate, then the structure is stable, but the pushing plate may offset and seize, causing uneven stress and damage
Solution Approach 1:
The pushing plate is designed to move dynamically relative to the supporting plate along guide rails. This dynamic capability allows the pushing plate to adapt to position changes of the continuous oil pipe while maintaining structural stability through the guide rail constraints, preventing offset and seizure.
Solution Approach 2:
The position of the pushing plate relative to the supporting plate can change within the guide rail constraints, allowing adjustment of clamping position and stress distribution. This parameter change capability enables the system to adapt to different oil pipe positions while maintaining stable operation.
3Ease of operation
If the clamping block seat slides on bearings, then the clamping assembly can move smoothly, but the seat is worn easily and is difficult to replace
Solution Approach 1:
The clamping block seat is designed as a simple, inexpensive component that can be easily replaced when worn. Rather than using expensive bearings that are difficult to replace, the seat itself becomes a replaceable component with a simple structure that facilitates easy maintenance and repair.
4Reliability
If the pushing plate carries bearing bracket and bearings, then the clamping function is achieved, but the clamping device becomes large in size and compromises injector head flexibility
Solution Approach 1:
The bearing assembly is completely removed from the pushing plate structure. The pushing plate retains only its essential function of guiding and supporting the clamping blocks, eliminating the volume occupied by bearing brackets and bearings, thereby reducing overall device size and improving injector head flexibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances maintainability, reduces wear, and provides a compact, flexible clamping mechanism that prevents deformation and misalignment, improving the oil tube clamping effect and maintaining even stress on the continuous oil pipe.
Implementation Method 1
on end of the pin shaft is connected to the pushing plate via a spherical plain bearing
Implementation Method 2
the rollers employ ceramic rolling shaft sleeves and don't have lubrication requirement
Implementation Method 3
the rollers employ ceramic rolling shaft sleeves and don't have lubrication requirement, the injector head moves more reliably
Implementation Method 4
a plurality of hydraulic oil cylinders are arranged at inner side of the two chains respectively, the pushing plate is pushed by the hydraulic oil cylinders
Data Source
AI summary
A floating clamping device for an injection head of a continuous oil pipe, including a drive sprocket, a transmission chain, a supporting plate, a pushing plate, clamping oil cylinders and a clamping assembly. At least two clamping oil cylinders are installed on the supporting plate fixedly. The pushing plate is fixed on the supporting plate through a pin shaft. The clamping assembly includes a saddle-shaped clamping block, a clamping block seat and rollers which are mounted on the clamping block seat. The clamping assembly is mounted on the transmission chain. A piston rod of the clamping oil cylinder is pressed on one face of the pushing plate, while the other face of the pushing plate is pressed on the rollers. The pushing plate has a simple structure and is convenient for maintenance; the clamping device has a compact structure and a reduced volume.