阅读说明：本技术 一种具有过载保护功能的管道恒力吊挂装置 (Pipeline constant force cable suspension device with overload protection function ) 是由 陈尚军 王军民 安付立 邓玲慧 康豫军 李楠林 程肖军 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种具有过载保护功能的管道恒力吊挂装置,包括过载装置筒体、承载端盖、第一拉杆及管夹抱箍；过载装置筒体内自上而下依次设置有过载阈值调节螺栓、弹簧压板及过载弹簧,过载装置筒体的顶部开口与承载端盖连接,过载阈值调节螺栓穿过承载端盖与弹簧压板相接触,第一拉杆的下端与承载端盖相连接,第一拉杆的上端与外界结构件连接；第二拉杆的上端插入于过载装置筒体内并穿过过载弹簧及弹簧压板后套接有承载螺母,第二拉杆的下端与管夹抱箍相连接,该装置具有吊挂载荷低于过载阈值时刚度为零、吊挂载荷高于过载阈值时刚度恒定、过载阈值可调的特点。(The invention discloses a pipeline constant-force hanging device with an overload protection function, which comprises an overload device cylinder, a bearing end cover, a first pull rod and a pipe clamp hoop, wherein the overload device cylinder is provided with a bearing end cover; an overload threshold adjusting bolt, a spring pressing plate and an overload spring are sequentially arranged in the overload device barrel from top to bottom, the top opening of the overload device barrel is connected with the bearing end cover, the overload threshold adjusting bolt penetrates through the bearing end cover to be in contact with the spring pressing plate, the lower end of the first pull rod is connected with the bearing end cover, and the upper end of the first pull rod is connected with an external structural member; the upper end of the second pull rod is inserted into the overload device cylinder and penetrates through the overload spring and the spring pressing plate to be sleeved with the bearing nut, the lower end of the second pull rod is connected with the pipe clamp hoop, and the device has the characteristics that the rigidity is zero when the hanging load is lower than the overload threshold value, the rigidity is constant when the hanging load is higher than the overload threshold value, and the overload threshold value is adjustable.)

1. A pipeline constant-force hanging device with an overload protection function is characterized by comprising an overload device cylinder (6), a bearing end cover (16), a first pull rod (51) and a pipe clamp hoop (8);

an overload threshold value adjusting bolt (10), a spring pressing plate (12) and an overload spring (13) are sequentially arranged in an overload device cylinder body (6) from top to bottom, the top opening of the overload device cylinder body (6) is connected with a bearing end cover (16), the overload threshold value adjusting bolt (10) penetrates through the bearing end cover (16) to be in contact with the spring pressing plate (12), the lower end of a first pull rod (51) is connected with the bearing end cover (16), and the upper end of the first pull rod (51) is connected with an external structural member;

the upper end of the second pull rod (52) is inserted into the overload device cylinder (6) and penetrates through the overload spring (13) and the spring pressing plate (12) to be sleeved with the bearing nut (17), and the lower end of the second pull rod (52) is connected with the pipe clamp hoop (8).

2. The pipeline constant-force hanging device with the overload protection function according to claim 1, wherein the upper end of the first pull rod (51) is connected with one side of the first turnbuckle (41), the other side of the first turnbuckle (41) is connected with the lower side of the constant-force hanging bracket (3), and the upper side of the constant-force hanging bracket (3) is connected with an external structural member.

3. The pipeline constant-force hanging device with the overload protection function as claimed in claim 2, wherein the upper side of the constant-force hanging bracket (3) is connected with an external structural member through a pin shaft (2) and a single-lug hanging plate (1).

4. The pipeline constant-force hanging device with the overload protection function as claimed in claim 2, wherein the first locking nut (141) is sleeved on the first pull rod (51).

5. The pipeline constant-force hanging device with the overload protection function as claimed in claim 1, wherein the lower end of the second pull rod (52) is connected with one side of the second turnbuckle (42), the upper end of the third pull rod (53) is connected with the other side of the second turnbuckle (42), the lower end of the third pull rod (53) is connected with one side of the pipe clamp hoop (8) through an eyenut (7) and a first pipe clamp bolt (91), and the other side of the pipe clamp hoop (8) is provided with a second pipe clamp bolt (92).

6. The pipeline constant-force hanging device with the overload protection function as recited in claim 5, wherein the third pull rod (53) is sleeved with a second lock nut (142).

7. The pipeline constant-force hanging device with the overload protection function as claimed in claim 1, wherein a slotted hole is formed in the side face of the overload device cylinder (6), the spring pressing plate (12) is provided with an overload displacement pointer (15), the overload displacement pointer (15) penetrates through the slotted hole, and the outer wall of the overload device cylinder (6) is provided with a scale matched with the overload displacement pointer (15).

8. The pipeline constant-force hanging device with the overload protection function is characterized in that the overload spring (13) is a cylindrical spiral spring with a circular section.

9. The pipeline constant-force hanging device with the overload protection function is characterized in that the top opening of the overload device cylinder (6) is connected with the bearing end cover (16) through the connecting bolt (11).

Technical Field

The invention relates to a pipeline constant force hanging device, in particular to a pipeline constant force hanging device with an overload protection function.

Background

The pipeline is a transportation system for connecting two or more devices to transport media, and is widely applied to the energy industry fields of thermal power plants, nuclear power plants, petrochemical industry and the like. In the service process, in order to overcome the effects of mechanical load, displacement load and thermal load, a hanging device needs to be arranged at a proper position on the pipeline so as to ensure the safe operation of the pipeline. A common pipe hanging device is: the device comprises a rigid hanging device, a constant force spring hanging device, a variable force spring hanging device and the like, wherein the constant force hanging device is usually used for places with large vertical displacement of a pipeline or needing to limit transfer load and is a vital component in a pipeline hanging system.

In practical engineering application, when the actual thermal displacement of the pipeline at the lifting point exceeds the displacement allowance of the constant-force hanger from the cold state to the hot state, the displacement pointer of the constant-force hanger is often in the limit position in the hot state, at the moment, the response rigidity of the constant-force hanger is changed from zero to infinite, the thermal displacement of the pipeline is limited, and the phenomena of structural part damage and hanger load loss can be caused under extreme conditions. In addition, when the load at the lifting point is too large, the abnormal problems of exceeding the stress of the pipeline and the like can be caused, and further the pipeline is deformed and cracked.

Therefore, there is a need for a more reasonable and effective constant-force pipeline hanging device, which needs to have the following functions: the integral rigidity is zero when the hanging load is lower than the overload threshold, the rigidity is constant when the hanging load is higher than the overload threshold, and the overload threshold is adjustable.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a pipeline constant-force hanging device with an overload protection function.

In order to achieve the purpose, the pipeline constant-force hanging device with the overload protection function comprises an overload device cylinder, a bearing end cover, a first pull rod and a pipe clamp hoop;

an overload threshold adjusting bolt, a spring pressing plate and an overload spring are sequentially arranged in the overload device barrel from top to bottom, the top opening of the overload device barrel is connected with the bearing end cover, the overload threshold adjusting bolt penetrates through the bearing end cover to be in contact with the spring pressing plate, the lower end of the first pull rod is connected with the bearing end cover, and the upper end of the first pull rod is connected with an external structural member;

the upper end of the second pull rod is inserted into the overload device cylinder and penetrates through the overload spring and the spring pressing plate to be sleeved with the bearing nut, and the lower end of the second pull rod is connected with the pipe clamp hoop.

The upper end of first pull rod is connected with one side of first turnbuckle screw, and the opposite side of first turnbuckle screw is connected through the downside of constant force gallows, and the upside and the external structure of constant force gallows are connected.

The upper side of the constant-force hanger is connected with an external structural member through a pin shaft and a single-lug hanger plate.

The first pull rod is sleeved with a first locking nut.

The lower extreme of second pull rod is connected with one side of second turnbuckle, and the upper end of third pull rod is connected with the opposite side of second turnbuckle, and the lower extreme of third pull rod is connected with one side of pipe clamp staple bolt through eyenut and first pipe clamp bolt, and the opposite side of pipe clamp staple bolt is provided with second pipe clamp bolt.

And a second locking nut is sleeved on the third pull rod.

The side surface of the overload device barrel is provided with a slotted hole, the spring pressing plate is provided with an overload displacement pointer, the overload displacement pointer penetrates through the slotted hole, and the outer wall of the overload device barrel is provided with scales matched with the overload displacement pointer.

The overload spring is a cylindrical spiral spring with a circular section.

The top opening of the overload device cylinder is connected with the bearing end cover through a connecting bolt.

The invention has the following beneficial effects:

when the pipeline constant-force hanging device with the overload protection function is operated specifically, the overload threshold value adjusting bolt is rotated to move in the axial direction of the overload device cylinder, so that the spring pressing plate is controlled to compress/release the overload spring, and the rotation amount of the overload threshold value adjusting bolt is controlled to accurately control the pre-tightening force of the overload spring, namely the overload threshold value. When the constant-force hanger normally works, the overload spring does not deform because the overload threshold value is greater than the working load of the hanger at the hanging point, and the response rigidity of the hanging device is zero; when the constant force hanger is at the limit position, the actual load at the hanging point is larger than the overload threshold value, the overload spring is further compressed, the response rigidity of the hanging device is the macroscopic rigidity of the overload spring, and the numerical value of the response rigidity is far smaller than the infinite rigidity of the constant force hanger after being blocked. Therefore, when the constant-force hanging bracket is blocked, the overload protection can be realized, and the pipeline stress at the hanging point is effectively reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the inside of the cylinder 6 of the overload device according to the invention;

FIG. 3 is a diagram illustrating the relationship between design parameters according to the present invention.

Wherein, 1 is a single lug hanger plate, 2 is a pin shaft, 3 is a constant force hanger, 41 is a first turnbuckle, 42 is a second turnbuckle, 51 is a first pull rod, 52 is a second pull rod, 53 is a third pull rod, 6 is an overload device cylinder, 7 is an eye nut, 8 is a pipe clamp hoop, 91 is a first pipe clamp bolt, 92 is a second pipe clamp bolt, 10 is an overload threshold value adjusting bolt, 11 is a connecting bolt, 12 is a spring press plate, 13 is an overload spring, 141 is a first lock nut, 142 is a second lock nut, 15 is an overload displacement pointer, 16 is a bearing end cover, and 17 is a bearing nut.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.

Referring to fig. 1 and 2, the pipeline constant-force hanging device with overload protection function of the present invention includes a constant-force hanger 3, an overload device cylinder 6, an overload threshold adjusting bolt 10, a spring pressing plate 12, an overload spring 13 and a pipe clamp anchor 8;

an overload threshold adjusting bolt 10, a spring pressing plate 12 and an overload spring 13 are sequentially arranged in an overload device cylinder 6 from top to bottom, the top opening of the overload device cylinder 6 is connected with a bearing end cover 16 through a connecting bolt 11, the overload threshold adjusting bolt 10 penetrates through the bearing end cover 16 to be contacted with the spring pressing plate 12, the lower end of a first pull rod 51 is connected with the bearing end cover 16, the upper end of the first pull rod 51 is connected with one side of a first turnbuckle 41, the other side of the first turnbuckle 41 is connected with the lower side of a constant force hanging bracket 3, the upper side of the constant force hanging bracket 3 is connected with an external structural member through a pin shaft 2 and a single lug hanging plate 1, and a first locking nut 141 is sleeved on the first pull rod 51;

the upper end of the second pull rod 52 is inserted into the overload device cylinder 6 and penetrates through the overload spring 13 and the spring pressing plate 12 to be sleeved with the bearing nut 17, the lower end of the second pull rod 52 is connected with one side of the second turnbuckle 42, the upper end of the third pull rod 53 is connected with the other side of the second turnbuckle 42, the lower end of the third pull rod 53 is connected with one side of the pipe clamp hoop 8 through the lifting ring nut 7 and the first pipe clamp bolt 91, the other side of the pipe clamp hoop 8 is provided with the second pipe clamp bolt 92, and the third pull rod 53 is sleeved with the second locking nut 142.

The side surface of the overload device cylinder 6 is provided with a slotted hole, the spring pressing plate 12 is provided with an overload displacement pointer 15, the overload displacement pointer 15 penetrates through the slotted hole, and the outer wall of the overload device cylinder 6 is provided with scales matched with the overload displacement pointer 15. The overload spring 13 is a cylindrical coil spring with a circular cross section.

The working principle of the invention is as follows:

working load F according to constant-force hanger 33_gzDetermining the preload F of the overload spring 13_turnSo that it satisfies: f_turn＝(1+η)F_gzWhere eta is an overload coefficient and the compression stiffness of the overload spring 13 is K₂The compression amount of the overload spring 13 by the spring pressure plate 12 is adjusted by rotating the overload threshold adjusting bolt 10 so as to accurately control the pretightening force F of the overload spring 13_turn. The rigidity of the constant force hanger 3 in normal operation is K₁Said K is₁Much less than K₂. When the constant force hanger 3 is at the cold state, the hot state and the limit position, the displacement pointer is respectively at D_LT、D_RTAnd D_turnThe actual thermal displacement in the hanging direction at the hanging point of the constant-force hanger 3 is L₁The thermal displacement from cold state to hot state at the suspension point is designated as L₂The displacement allowance of the constant force hanger 3 from the cold state to the hot state is L₃. When L is₁≤L₂At this time, the overload spring 13 is not compressed, and the actual load F on the boom is F_gzThe integral rigidity K of the hanging device is equal to K₁(ii) a When L is₂<L₁≤L₃At this time, the overload spring 13 is not compressed, and the actual load F on the boom is F_gzThe overall stiffness K of the suspension device being K₁(ii) a When L is₁>L₃Then, the overload displacement pointer 15 is dead to the limit position, the overload spring 13 is further compressed from the pre-pressing state, and the actual load F on the suspension rod is F_turn+K₂·(L₁-L₃) The overall stiffness K of the suspension device being K₂。

Therefore, the constant force hanger 3 can keep the original constant force characteristic in the displacement allowance stroke from the cold state to the hot state; when the actual thermal displacement at the lifting point exceeds the displacement allowance from the cold state to the hot state of the constant-force hanger 3, the hanging device can allow the pipeline to continue to generate displacement, so that the problem of local stress surge of the pipeline caused by the clamping of the constant-force hanger 3 is effectively avoided, namely, an overload protection function is formed on the pipeline, and the safe operation reliability of the pipeline is greatly improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention shall be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.