Manufacturing method of controllable constant-resistance deformation anchorage device

Abstract

A manufacturing method of a controllable constant-resistance deformation anchorage device comprises the following steps that S1, an anchorage device body with the length being L, the breaking force being Fb and the outer diameter being R1 is selected according to a current application scene; s2, a constant-pressure deformation sleeve is arranged on the outer side of the anchorage device body in a sleeving mode; the radial bearing force of the constant-pressure deformation sleeve is N, and N is smaller than Fb; s3, a lock is arranged at one end of the anchorage device body, and the constant-pressure deformation sleeve is moved to abut against the lock; s4, the end, away from the lock, of the anchorage device body penetrates through a ball pad, the inner diameter of the end, away from the lock, of the ball pad is R2, the inner diameter of the end, close to the lock, of the ball pad is R3, and the two sections of inner diameters are in smooth transition through a guide slope with the angle of alpha; the constant-pressure deformation sleeve is provided with a diagonal plane corresponding to the guide inclined plane, the radial force of the constant-pressure deformation sleeve is N, and N is smaller than necking force P; and S5, the end, away from the lock, of the anchorage device body penetrates through the tray, and the tray abuts against the end, away from the lock, of the ball pad. And the deformation of the constant-pressure deformation sleeve can be controlled under controllable conditions.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to a method for manufacturing a controllable constant resistance deformation anchor. Background Art

[0002] In a method for using a new type of external expansion friction constant resistance energy absorption anchor rod with announcement number CN112922654B, an anchor structure is disclosed. The above-mentioned anchor rod can prevent the anchor rod from being stretched and then broken by the external expansion deformation by setting an external expansion elastic ring and a conical nut. The external expansion deformation method cannot obtain a constant resistance effect due to the uncertainty of the external expansion shape and deformation state. Moreover, due to its structural characteristics, it cannot be controlled to deform within a certain extent and maintain the energy absorption effect through a pre-designed method. Moreover, due to the uncontrollability of the cracking position and cracking state, its deformation range is also unpredictable. Summary of the Invention

[0003] In order to solve the problem of too many uncontrollable factors in the above-mentioned external expansion deformation, the present invention provides a method for manufacturing a controllable constant resistance deformation anchor.

[0004] The technical solutions of the present invention are as follows:

[0005] A method for manufacturing a controllable constant resistance deformation anchor comprises the following steps:

[0006] S1. Select the length L and breaking force F according to the current application scenario. b , the anchor body has an outer diameter of R1;

[0007] S2. A constant pressure deformation sleeve is sleeved on the outer side of the anchor body;

[0008] The radial bearing capacity of the constant pressure deformation casing is N, and N<F b ;

[0009] S3, setting a lock at one end of the anchor body, and moving the constant pressure deformation sleeve until it contacts the lock;

[0010] S4, passing through the ball pad at the end of the anchor body away from the lock, wherein the inner diameter of the ball pad at the end away from the lock is R2, and the inner diameter of the end close to the lock is R3, and the two inner diameters are smoothly transitioned by a guide slope with an angle of α;

[0011] The constant pressure deformation sleeve is provided with an oblique cut surface corresponding to the guide inclined surface, and the radial force of the constant pressure deformation sleeve is N, and N is less than the shrinking force P;

[0012] S5. The end of the anchor body away from the lock passes through the tray, and the tray contacts the end of the ball pad away from the lock.

[0013] The way to set the yield force is to preset the yield force to F p , and F b =1.2*F p , and the above shrinkage force P=F p .

[0014] The method of presetting the specifications of the constant pressure deformation sleeve by the shrinking force is that the initial radius R0 of the constant pressure deformation sleeve, the radius after shrinking r0 and the thickness t of the constant pressure deformation sleeve meet the following calculation formula:

[0015] P=-2.2πR0tσ b (1+μcotα)*(1-r0 / R0)(3-2cosα);

[0016] where σ b is the strength limit of the constant pressure deformation casing material, and μ is the friction coefficient between the constant pressure deformation casing and the ball pad.

[0017] In order to avoid shaking of the anchor body, the initial radius R0 of the constant pressure deformation sleeve is within the range of 1.3*R1<R0<1.4*R1.

[0018] As a preferred solution, the calculation formula of the radial bearing force N is:

[0019]

[0020] Stability coefficient of axially compressed members (determined by looking up the table);

[0021] A: cross-sectional area of ​​constant pressure deformation casing;

[0022] f: Design value of compressive strength of steel (determined by the material, obtain from specifications).

[0023] In order to ensure sufficient radial bearing capacity, the calculation formula for the cross-sectional area of ​​the constant pressure deformation casing is:

[0024]

[0025] As a preferred solution, λ is the slenderness ratio, and its calculation formula is:

[0026] According to λ and steel yield strength f, check Appendix C (Stability Factor Table of Axially Compression Members) of the specification to obtain Value, L is the length of the constant pressure deformation casing.

[0027] To ensure normal installation and controllable status, R1<R0<R2<R0+t<R3.

[0028] In order to limit the anchor body, the ball pad is away from the end of the lock, and a guide sleeve is provided on its inner wall. The initial thickness of the guide sleeve is j, the maximum compression thickness is k, and j<k+t≤R2-R1.

[0029] In order to prevent the anchor from bending, the contact surface between the ball pad and the tray is a spherical surface.

[0030] The beneficial effects of the present invention are: the present invention is a method for manufacturing a controllable constant resistance deformation anchor, which can be deformed by internal collapse to avoid the breakage of the anchor body, and in the above structure, since the structure of the ball pad is controllable, the shrinking force of its guide slope and the constant pressure deformation sleeve is controllable, so the inner and outer diameters and length design of the constant pressure deformation sleeve can be controlled according to the preset requirements, thereby achieving the preset effect, and the process is controllable, the deformation method is controllable, and the deformation process is controllable. Compared with the external expansion method, various parameters can be preset according to requirements to achieve the preset effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By reading the detailed description of the preferred embodiment below, the solutions and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only for illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0032] In the attached figure:

[0033] Figure 1 This is a line arrangement curve diagram after applying the constant pressure deformation casing of the present invention;

[0034] Figure 2 Schematic diagram of the structure of the present invention (normal state);

[0035] Figure 3 Schematic diagram of the structure of the present invention (stressed state);

[0036] Figure 4 For the present invention Figure 2 Schematic diagram of local structure;

[0037] Figure 5 For the present invention Figure 3 Structural diagram;

[0038] The components represented by the reference numerals in the figure are:

[0039] 1. Tray; 2. Ball pad; 21. Guide slope; 3. Guide sleeve; 31. Pressure-bearing part; 4. Constant pressure deformation sleeve; 5. Anchor body; 6. Lock. DETAILED DESCRIPTION

[0040] Example

[0041] A method for manufacturing a controllable constant resistance deformation anchor comprises the following steps:

[0042] S1. Select the length L and breaking force F according to the current application scenario. b , the anchor body 5 has an outer diameter of R1, and the anchor body 5 can be an anchor rod or an anchor cable, wherein the specifications of the anchor body 5 are completely determined according to the actual application scenario, so all the above values ​​are preset values. After selecting the corresponding anchor body 5, the specification information can be obtained, and it should be noted that the maximum deformation length of the above anchor body 5 is less than 20% of the total length. After determining the application specifications of the above anchor body 5, the subsequent steps can be carried out;

[0043] S2. A constant pressure deformation sleeve 4 is sleeved on the outer side of the anchor body 5;

[0044] The radial bearing force of the constant pressure deformation sleeve 4 is N, and N<F b The above method can ensure that the above constant pressure deformation sleeve 4 can be under the preset conditions, that is, lower than the breaking force F b The deformation is completed under the condition of the anchor rod, and the anchor body 5 structure can be protected by replacing the anchor rod for deformation. The deformation process is the same as that of the anchor body 5 and follows Hooke's law. Therefore, the deformation distance of the original anchor body 5 can be extended and the protection can be completed.

[0045] S3. A lock 6 is provided at one end of the anchor body 5, and the constant pressure deformation sleeve 4 is moved to contact the lock 6. By setting the lock 6, the constant pressure deformation sleeve 4 can be pressed and tightened, and the stress is transmitted. The lock 6 is generally a lock buckle or nut structure. Since its structure is a conventional means, it will not be described in detail.

[0046] S4. After step S3, the end of the anchor body 5 away from the lock 6 passes through the ball pad 2, and the inner diameter of the end of the ball pad 2 away from the lock 6 is R2, and the inner diameter of the end close to the lock is R3, and the two inner diameters are smoothly transitioned by a guide slope 21 with an angle of α. By setting the guide slope 21, a shrinking force can be provided, thereby causing the above-mentioned constant pressure deformation sleeve 4 to undergo plastic deformation;

[0047] To this end, the constant-pressure deformation sleeve 4 is provided with an oblique surface corresponding to the guide inclined surface 21, and the radial force of the constant-pressure deformation sleeve 4 is N, and N<shrinking force P. Through the above method, it can be ensured that after the constant-pressure deformation sleeve 4 is pressurized, shrinking is achieved through the above method, and after shrinking, it can be deformed. During the deformation process, the constant-pressure deformation sleeve 4 can be deformed simultaneously with the anchor body 5 and follow Hooke's law, thereby achieving different feedback effects under different stresses. After the above feedback, it can have a larger deformation stroke than the original anchor body 5, thereby obtaining a better protection effect.

[0048] The method of presetting the specifications of the constant pressure deformation sleeve 4 by the shrinking force is that the initial radius R0 of the constant pressure deformation sleeve 4, the radius after shrinking r0 and the thickness t of the constant pressure deformation sleeve 4 satisfy the following calculation formula:

[0049] P=-2.2πR0tσ b (1+μcotα)*(1-r0 / R0)(3-2cosα);

[0050] where σ b is the strength limit of the constant pressure deformation sleeve 4 material, μ is the friction coefficient between the constant pressure deformation sleeve 4 and the ball pad 2. Except for the specification value of the constant pressure deformation sleeve 4, other values ​​can be directly obtained or preset. Therefore, it is only necessary to bring the specifications of the constant pressure deformation sleeve 4 to be installed into the above formula. After calculation, it can be found out whether its specifications can meet the requirements. If it meets the requirements, it can be applied. If it does not meet the requirements, it cannot be applied, and its specifications need to be changed until it meets the requirements.

[0051] Moreover, as a preferred solution, the calculation formula of the radial bearing force N is:

[0052]

[0053] Stability coefficient of axially compressed members (determined by looking up the table);

[0054] A: cross-sectional area of ​​constant pressure deformation casing 4;

[0055] f: Design value of compressive strength of steel (determined by the material, obtain from specifications).

[0056] In order to ensure sufficient radial bearing capacity, the cross-sectional area of ​​the constant pressure deformation sleeve 4 is calculated as follows:

[0057]

[0058] As a preferred solution, λ is the slenderness ratio, and its calculation formula is:

[0059] According to λ and steel yield strength f, check Appendix C (Stability Factor Table of Axially Compression Members) of the specification to obtain Value, L is the length value of the constant pressure deformation sleeve 4, by bringing in the specifications of the above-mentioned constant pressure deformation sleeve 4 vertically and bringing them into the above-mentioned formula respectively and comparing them to obtain the structure, it can be judged whether the above-mentioned specifications can meet the requirements, and if Figure 1As shown in the figure, the requirements are met, and its line curve is shown in the figure. It can be deformed under different stress conditions and can provide constant resistance to avoid damage to the anchor body 5. However, the above-mentioned constant pressure deformation sleeve 4 also has a deformation upper limit. When it is completely collapsed and when the ball pad 2 contacts the lock 6, it will not be able to play a role. If the stress continues to increase, the above-mentioned anchor body 5 will still be damaged. However, in this process, the above-mentioned anchor body 5 can be protected by the constant pressure deformation sleeve 4, and the design process of the constant pressure deformation sleeve 4 is not limited to a few fixed specifications. Since the anchor body 5 is freely designed according to the environment, after meeting the corresponding design requirements, it is substituted into the above formula for calculation and comparison. As long as it meets the conditions, it can be applied. After application, the anchor body 5 can be protected.

[0060] In order to facilitate installation, and in the above structure, in order to ensure normal installation and controllable status, R1<R0<R2<R0+t<R3, the above method can facilitate the installation and use of each structure, and ensure that each structure is in the preset position, and there will be no phenomenon of being unable to install or the installation position being staggered.

[0061] Afterwards, in order to achieve the limitation of the anchor body 5, the ball pad 2 is away from the end of the lock 6, and a guide sleeve 3 is provided on its inner wall, and the initial thickness of the guide sleeve 3 is j, the maximum compression thickness is k, and j<k+t≤R2-R1. Through the above-mentioned setting method, it can avoid the situation where the above-mentioned constant pressure deformation sleeve 4 cannot shrink normally.

[0062] S5. The end of the anchor body 5 away from the lock 6 passes through the tray, and the tray contacts the end of the ball pad 2 away from the lock 6. Finally, in order to prevent the anchor from bending, the contact surface between the ball pad 2 and the tray is a spherical surface.

[0063] As a preferred embodiment, the yield force is set as follows: the yield force is preset to F p , and F b =1.2*F p , and the above shrinkage force P=F p The above-mentioned yield force, shrinkage force and radial bearing capacity can all adopt range values, that is, an interval of 10% fluctuation, which is convenient for designing the constant pressure deformation sleeve 4.

[0064] Finally, it should be noted that in order to avoid shaking of the anchor body 5, the initial radius R0 of the constant pressure deformation sleeve 4 is within the range of 1.3*R1<R0<1.4*R1.

Claims

1. A method for manufacturing a controllable constant resistance deformation anchor, characterized in that: The following steps are involved: S1. Select the length L and breaking force F according to the current application scenario. b , the anchor body has an outer diameter of R1; S2. A constant pressure deformation sleeve is sleeved on the outer side of the anchor body; The radial bearing capacity of the constant pressure deformation casing is N, and N<F b ; S3, setting a lock at one end of the anchor body, and moving the constant pressure deformation sleeve until it contacts the lock; S4, passing through the ball pad at the end of the anchor body away from the lock, wherein the inner diameter of the ball pad at the end away from the lock is R2, and the inner diameter of the end close to the lock is R3, and the two inner diameters are smoothly transitioned by a guide slope with an angle of α; The constant pressure deformation sleeve is provided with an oblique cut surface corresponding to the guide inclined surface, and the radial force of the constant pressure deformation sleeve is N, and N is less than the shrinking force P; S5. The end of the anchor body away from the lock passes through the tray, and the tray contacts the end of the ball pad away from the lock.

2. The method for manufacturing a controllable constant resistance deformation anchor according to claim 1, characterized in that: The default yield strength is F p , and F b =1.2*F p , and the above shrinkage force P=F p .

3. The method for manufacturing a controllable constant resistance deformation anchor according to claim 2, characterized in that: The initial radius R0, the radius after shrinkage r0 and the thickness t of the constant pressure deformation sleeve satisfy the following calculation formula: P=-2.2πR0tσ b (1+μcotα)*(1-r0 / R0)(3-2cosα); where σ b is the strength limit of the constant pressure deformation casing material, and μ is the friction coefficient between the constant pressure deformation casing and the ball pad.

4. The method for manufacturing a controllable constant resistance deformation anchor according to claim 3, characterized in that: The initial radius R0 of the constant pressure deformation sleeve is in the range of 1.3*R1<R0<1.4*R1.

5. The method for manufacturing a controllable constant resistance deformation anchor according to claim 1, characterized in that: The calculation formula of the radial bearing force N is: Stability factor of axially compressed members; A: cross-sectional area of ​​constant pressure deformation casing; f: Design value of compressive strength of steel.

6. The method for manufacturing a controllable constant resistance deformation anchor according to claim 5, characterized in that: The calculation formula for the cross-sectional area of ​​the constant pressure deformation casing is:

7. The method for manufacturing a controllable constant resistance deformation anchor according to claim 6, characterized in that: The λ is the slenderness ratio, and its calculation formula is: According to λ and steel yield strength f, check the stability coefficient table of axially compressed members to obtain Value, L is the length of the constant pressure deformation casing.

8. The method for manufacturing a controllable constant resistance deformation anchor according to claim 1, characterized in that: R1<R0<R2<R0+t<R3.

9. The method for manufacturing a controllable constant resistance deformation anchor according to claim 1, characterized in that: The end of the ball pad away from the lock has a guide sleeve on its inner wall, and the initial thickness of the guide sleeve is j, the maximum compression thickness is k, and j<k+t≤R2-R1.

10. The method for manufacturing a controllable constant resistance deformation anchor according to claim 1, characterized in that: The contact surface between the ball pad and the tray is a spherical surface.

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