CN112523704A

CN112523704A - Dead rope fixer

Info

Publication number: CN112523704A
Application number: CN202011400445.0A
Authority: CN
Inventors: 易先中; 张仕帆; 侯松; 刘航铭; 贺育贤; 葛先驰; 杨泽红; 彭紫俊
Original assignee: Yangtze University
Current assignee: Yangtze University
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-03-19

Abstract

The invention provides a dead rope fixer, which comprises a rope wheel, a sensor support arm, a rope clamp support arm, an ear block and a wheel core, wherein the center of the rope wheel is provided with the wheel core; the dead line fixer is cast by Q345E steel, the transition fillet radius of the sensor arm is 130mm and 150mm, and the thickness of the sensor arm is 40-50 mm. By optimizing the size of the sensor support arm, the maximum equivalent stress of the dead line fixator is reduced, the requirement on materials is reduced, and the cost is further reduced.

Description

Dead rope fixer

Technical Field

The invention relates to the technical field of petroleum drilling tools, in particular to a dead line fixer.

Background

The dead line fixer is a device which is arranged at the corresponding position of the inner side of a derrick or a drill floor structure and is used for fixing the dead line end of a drilling big line. In addition, the device can also play a role in measuring the tension of a dead line so as to monitor the bit pressure in real time, can also play a role in guiding when the drilling is carried out and the line is changed, and is very key equipment in a drilling hoisting system.

Fig. 1 is an JZG18 model dead line anchor comprising a sheave, a sensor arm, a rope clamp arm, and a wheel core. The rope sheave center is provided with the wheel core, wheel core upwards evenly is provided with a plurality of floor in the circumference, the floor is with wheel core fixed connection at the rope sheave inner wall. One side of the rope wheel is provided with a rope clamp support arm, and the other side of the rope wheel is provided with a sensor support arm. Because the dead line fixator with the type shows the problem that the service life does not reach the standard in the trial process, the dead line fixator with the structure is subjected to static load calculation by using ANSYS Workbench software, the maximum equivalent stress value is 500.8MPa, the maximum equivalent stress value is greater than 345MPa of yield strength of Q345E for preparing the dead line fixator material, and the safety coefficient is only 0.69, so that the requirement cannot be met. Parts such as the rope wheel of the dead rope fixer and the sensor support arm of the model have complex shapes, and common manufacturers adopt integral casting, so that casting defects exist in castings to different degrees. The elimination of casting defects can add significant manufacturing costs.

The influence of each part of the sensor of the model on the maximum equivalent stress of the dead line fixator is analyzed, and the influence of the sensor support arm on the maximum equivalent stress is found to be the maximum. The radius of the transition fillet of the traditional support arm sensor support arm is 150mm, the thickness of the sensor support arm is 30mm, and the calculation result of the static load shows that the maximum equivalent stress value of the part can be effectively reduced and the safety coefficient of the part can be effectively improved through the optimization of the sizes of the parts.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides an improved dead line fixer, which can effectively reduce the maximum equivalent stress and improve the safety factor by optimizing the size of a sensor support arm.

The technical scheme of the invention is as follows:

a dead rope fixer comprises a rope wheel, a sensor support arm, a rope clamp support arm and a wheel core, wherein the center of the rope wheel is provided with the wheel core, the wheel core is uniformly provided with a plurality of rib plates in the circumferential direction, the rib plates fixedly connect the wheel core to the inner wall of the rope wheel, one side of the rope wheel is provided with the rope clamp support arm, and the other side of the rope wheel is provided with the sensor support arm; the dead line fixer is cast by Q345E steel, the transition fillet radius of the sensor arm is 130mm and 150mm, and the thickness of the sensor arm is 40-50 mm.

Further, the transition fillet radius of the sensor support arm is 130-150mm, and the thickness of the sensor support arm is 45-50 mm.

Further, the radius of the transition fillet of the sensor support arm is 130mm, and the thickness of the sensor support arm is 50 mm.

In some embodiments, the maximum equivalent stress value of the dead-line fixation device is within 237.79 MPa.

Further, the maximum equivalent stress value of the dead line fixator is within 267.20 MPa.

The invention has the beneficial effects that:

by optimizing the size of the key parts, the maximum equivalent stress is effectively reduced, the safety coefficient is improved, the requirements on materials and manufacturing processes are reduced, and the cost is further reduced.

Drawings

Fig. 1 is a schematic structural view of a dead line anchor on the market.

In the drawings, the components represented by the respective reference numerals are listed below:

1 rope sheave, 2 sensor support arms, 3 rope card support arms, 7 floor, 9 wheel cores.

Detailed Description

The invention improves a dead rope fixer commonly available in the market, in particular to the improvement of the transition fillet radius of a sensor arm and the thickness of the sensor arm. The remaining components are prepared according to the prior art.

The structure of the dead line fixer is shown in figure 1, and comprises a rope wheel 1, a sensor support arm 2, a rope clamp support arm 3 and a wheel core 9. The rope sheave 1 center is provided with wheel core 9, wheel core 9 evenly is provided with a plurality of floor 7 in circumference, floor 7 is with wheel core 9 fixed connection at rope sheave 1 inner wall. One side of the rope wheel 1 is provided with a rope clamp support arm 3, and the other side is provided with a sensor support arm 2.

The radius of the transition fillet of the sensor support arm refers to the radius of a circle tangent to an included angle formed by the outer diameter of the rope wheel and the sensor support arm. The sensor arm thickness refers to the end thickness of the sensor arm, as shown at d in FIG. 1.

Example 1

This embodiment provides an enhanced dead line anchor with sheave rib thickness, sheave wall thickness, sensor arm transition fillet radius and sensor arm thickness dimensions as shown in table 1.

Table 1 part sizes of example 1

Details of the components	Size/mm
		Sensor support arm transition fillet radius	130
Thickness of sensor arm	40

Example 2

This embodiment provides an enhanced dead line anchor with sensor arm transition fillet radii and sensor arm thickness dimensions as shown in table 2.

Table 2 part dimensions of example 2

Details of the components	Size/mm
		Sensor support arm transition fillet radius	130
Thickness of sensor arm	45

Example 3

This embodiment provides an enhanced dead line anchor with sensor arm transition fillet radii and sensor arm thickness dimensions as shown in table 3.

Table 3 component dimensions of example 3

Details of the components	Size/mm
		Sensor support arm transition fillet radius	130
Thickness of sensor arm	50

Example 4

This embodiment provides an enhanced dead line anchor with sensor arm transition fillet radii and sensor arm thickness dimensions as shown in table 4.

Table 4 part sizes of example 4

Example 5

This embodiment provides an enhanced dead line anchor with sensor arm transition fillet radii and sensor arm thickness dimensions as shown in table 5.

Table 5 part sizes of example 5

Details of the components	Size/mm
		Sensor support arm transition fillet radius	140
Thickness of sensor arm	45

Example 6

This embodiment provides an enhanced dead line anchor with sensor arm transition fillet radii and sensor arm thickness dimensions as shown in table 6.

Table 6 part sizes of example 6

Details of the components	Size/mm
		Sensor support arm transition fillet radius	140
Thickness of sensor arm	50

Example 7

This embodiment provides an enhanced dead line anchor with sensor arm transition fillet radii and sensor arm thickness dimensions as shown in table 7.

Table 7 part sizes of example 7

Details of the components	Size/mm
		Sensor support arm transition fillet radius	140
Thickness of sensor arm	40

Example 8

This embodiment provides an enhanced dead line anchor with sensor arm transition fillet radii and sensor arm thickness dimensions as shown in table 8.

Table 8 dimensions of parts of example 8

Details of the components	Size/mm
		Sensor support arm transition fillet radius	150
Thickness of sensor arm	45

Example 9

This embodiment provides an enhanced dead line anchor with sensor arm transition fillet radii and sensor arm thickness dimensions as shown in table 9.

TABLE 9 part sizes of example 9

Details of the components	Size/mm
		Sensor support arm transition fillet radius	150
Thickness of sensor arm	50

Comparative example 1

The dead line fixer of this comparison example is JZG18 type dead line fixer, the material that the dead line fixer adopted is steel Q345E. The thickness of the rib plate of the rope wheel, the thickness of the wall of the rope wheel, the radius of the transition fillet of the sensor support arm and the thickness dimension of the sensor support arm are shown in the table 10.

TABLE 10 part sizes for comparative example 1

Details of the components	Size/mm
		Sensor support arm transition fillet radius	150
Thickness of sensor arm	30

Examples of the experiments

The maximum equivalent stress of the dead-line fixation devices prepared in examples 1-9 and comparative example 1 was tested. The test results are shown in Table 11.

The safety factor in the table is the yield stress value of the material/maximum equivalent stress value of the dead line anchor.

TABLE 11 test results for dead-line anchors prepared in examples 1-9 and comparative example 1

As can be seen from Table 11, the maximum isoeffect force of the JZG18 type dead-line anchor is up to 500.8MPa, and the maximum equivalent stress can be reduced to 267.20MPa after improvement.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A dead rope fixer comprises a rope wheel, a sensor support arm, a rope clamp support arm and a wheel core, wherein the center of the rope wheel is provided with the wheel core, the wheel core is uniformly provided with a plurality of rib plates in the circumferential direction, the rib plates fixedly connect the wheel core to the inner wall of the rope wheel, one side of the rope wheel is provided with the rope clamp support arm, and the other side of the rope wheel is provided with the sensor support arm; the dead line fixer is cast by Q345E steel and is characterized in that the transition fillet radius of the sensor arm is 130mm and 150mm, and the thickness of the sensor arm is 40-50 mm.

2. The dead line holder of claim 1 wherein the sensor arm transition radius is 130-140mm and the sensor arm thickness is 45-50 mm.

3. The dead line fixation device of claim 2 wherein the sensor arm transition fillet radius is 130mm and the sensor arm thickness is 50 mm.

4. The dead line fixation device as claimed in any one of claims 1 to 3, wherein said dead line fixation device has a maximum equivalent stress value within 267.20 MPa.