CN217800126U

CN217800126U - Flange opening adjusting device

Info

Publication number: CN217800126U
Application number: CN202222345980.1U
Authority: CN
Inventors: 李天帅; 霍军涛; 张鹏; 徐树凯; 南海传; 冷本宇; 李金峰; 肖明月
Original assignee: China Nuclear Industry Fifth Construction Co Ltd
Current assignee: China Nuclear Industry Fifth Construction Co Ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-11-15
Anticipated expiration: 2032-09-02

Abstract

A flange opening adjusting device comprises an anchor ear, a limiting connecting screw and an adjusting device, wherein the anchor ear comprises a first anchor ear and a second anchor ear which are respectively used for clamping pipelines at two sides of a flange to be separated; the plurality of limiting connecting screws sequentially penetrate through the first hoop and the second hoop along the axial direction of the hoop and are fixedly connected with the first hoop, and the interval between every two adjacent limiting connecting screws is not more than 180 degrees; the limiting connecting screw rod is connected with the second hoop through the adjusting device so as to allow the adjusting device to adjust the distance between the first hoop and the second hoop. The device can improve the efficiency of pipeline operation, shortens the field operation time, reduces the operation risk.

Description

Flange opening adjusting device

Technical Field

The utility model belongs to the industrial pipeline overhauls field, concretely relates to flange flaring adjusting device.

Background

With the energy structure change and the increase of industrial demand, the construction number and scale of the LNG storage tank are continuously increased, and the maintenance demand for the LNG pipeline is also continuously increased. The maintenance operation of the LNG pipeline, particularly the maintenance operation without stopping the pipeline, is usually accompanied by the escape of flammable and explosive gas, and belongs to high-risk operation, so that the maintenance efficiency is improved as much as possible, the field operation time is shortened, and the method has important significance for reducing safety risks and saving the maintenance cost. When the LNG pipeline is partially maintained and blocked by a blind plate, a pair of double flanges in a butt joint state need to be separated, however, the flange opening adjusting device used in the industry at present is inconvenient to operate due to single function, cannot be positioned in the flange separation process, easily influences alignment of bolt holes after the flange is reset, reduces the operation efficiency, and increases potential safety hazards.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flange mouth of a river adjusting device can keep the flange of separation to adjust well when carrying out the operation to the pipeline flange.

According to an aspect of an embodiment of the present invention, a flange opening adjusting device is provided, which includes an anchor ear, a limiting connection screw and an adjusting device, wherein the anchor ear includes a first anchor ear and a second anchor ear, and the first anchor ear and the second anchor ear are respectively used for clamping pipelines at two sides of a flange to be separated; the plurality of limiting connecting screw rods sequentially penetrate through the first hoop and the second hoop along the axial direction of the hoop and are fixedly connected with the first hoop, and the interval between every two adjacent limiting connecting screw rods is not more than 180 degrees; the adjusting device is used for adjusting the relative position of the limiting connecting screw rod and the second hoop so as to adjust the distance between the first hoop and the second hoop.

The existing flange opening tool often only applies acting force from one side of a pipeline, axial offset is easily caused in the separation and reset processes of the flange, mounting screw holes cannot be aligned, the flange end face is possibly damaged due to overlarge resolving power, extra time is consumed for adjustment and centering, and the risk of field operation is increased in dangerous pipeline operation. The utility model provides a flange opening adjusting device treats the pipeline of separation through first staple bolt and second staple bolt centre gripping respectively to utilize a plurality of connecting screw to provide drive and guide for the separation process of flange, avoid the pipeline that the unilateral application of force leads to deflect, guarantee that flange separation process is along pipeline axial motion all the time, thereby keep the flange screw to keep the state of adjusting well each other all the time, effectively improved the operating efficiency that flange separation and reset.

Furthermore, the limit connecting screw rods are symmetrically arranged about the axis of the hoop. The limiting connecting screws are symmetrically arranged to enable the pipeline and the hoop to be uniformly stressed, and the stability of the device is maintained in the operation process.

Furthermore, the number of the limit connecting screws is 4, and the limit connecting screws are arranged at equal intervals. 4 spacing connecting screw arrange in the hoop week side with the cross, realize better balance between the stability of the simplicity and convenience of operation and device.

Further, the distance between at least one pair of limiting connecting screws is larger than the outer diameter of the flange to be separated. Sufficient space is reserved between the limiting connecting screw rods so as to facilitate the blind plate plugging and other operations.

Further, the adjusting device is configured to be an adjusting nut which is arranged on the limiting connecting screw in a penetrating mode. The adjusting nut is screwed through the wrench, so that the distance between the first hoop and the second hoop can be quickly adjusted, and the operation is simple and convenient without an additional tool.

Further, a lubricating washer is arranged between the adjusting nut and the second hoop. Set up lubricated packing ring between adjusting nut and second staple bolt and be favorable to protecting staple bolt and bolt, avoid wearing and tearing increase of service life.

Furthermore, the first anchor ear and the second anchor ear respectively comprise two semicircular anchor ear sub-pieces, and the anchor ear sub-pieces are fastened through bolts. The paired hoop components are convenient to rapidly disassemble and assemble, and the bolts can connect the pair of hoops into a whole and can also adjust the holding force between the hoops and the pipeline to a certain degree.

Furthermore, an elastic gasket is arranged on the contact surface of the hoop member and the pipeline. The liner is used for protecting the surface of the pipeline from abrasion, and meanwhile, the friction force between the hoop and the pipeline is improved.

Furthermore, the device still includes a plurality of positioning bolts, a plurality of positioning bolts wear to establish respectively on the staple bolt and the butt in treat the terminal surface of the flange of dismantling, with to the staple bolt with treat that the flange of separating is fixed a position. The positioning bolts are used for ensuring that the distance between the hoop and the end face of the flange is equal, and the operation is prevented from being influenced by the deviation of the installation position of the hoop.

Furthermore, the positioning bolt is arranged on a connecting line of the limiting connecting screw rod and the axle center of the hoop. The positioning bolt is arranged on the connecting line of the limiting connecting screw rod and the axle center of the hoop, so that the position precision of the limiting connecting screw rod can be ensured.

Drawings

FIG. 1 is a front view of a flange flare adjusting apparatus according to an embodiment;

fig. 2 is a left side view of a structure of the flange flare adjusting device in one embodiment.

The drawings are intended to illustrate the present invention in detail so that those skilled in the art can understand the technical idea of the present invention, and are not intended to limit the present invention. For the sake of clarity, the drawings described above schematically illustrate structures associated with features of the present invention and do not show the complete apparatus, device and full details strictly to scale.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description of preferred embodiments thereof, which is illustrated in the accompanying drawings.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment herein. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive. Those skilled in the art will appreciate that embodiments described herein may be combined with other embodiments without structural conflict.

In the description herein, unless otherwise expressly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly, as meaning movable connections, fixed connections, or integral connections, for example. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the description herein, terms indicating orientation or positional relationship, such as "upper," "lower," "left," "right," "axial," "circumferential," and the like, are intended for accurate description and simplified description, rather than limiting the referenced parts or structures to a particular orientation, to be mounted or operated in a particular orientation, and are not to be construed as limiting the embodiments herein.

In the description herein, the terms "first", "second", and the like are used only for distinguishing between different objects and are not to be construed as indicating relative importance or defining the number, specific order, or primary and secondary relationship of the technical features described. In the description herein, "plurality" means at least two.

An embodiment of the utility model provides a flange mouth of a mouth adjusting device for realize the quick maintenance operation to flange structure on the pressure pipeline. The structure of the device is shown in fig. 1 and fig. 2, and comprises a first anchor ear 11, a second anchor ear 12,4 limit connecting screw rods 13 which are arranged on the periphery of the anchor ear in a cross shape at equal intervals, a supporting arm 112 of the first anchor ear 11 and a supporting arm (not shown) of the second anchor ear 12 sequentially pass through along the axial direction, and the limit connecting screw rods 13 and the first anchor ear 11 are fixedly connected together by a locking nut 19. A pair of adjusting

nuts

14a, 14b are arranged on the limit connecting screw 13 in a penetrating manner and are respectively located at two sides of the second hoop 12, and the rotating adjusting

nuts

14a or 14b can push the second hoop 12 to be close to or far away from the first hoop 11 by the end surface thereof. The clamping portion 111 of the first anchor ear 11 and the clamping portion (not shown) of the second anchor ear 12 respectively clamp on the outer wall of the pipe 21 on both sides of the

flanges

22a and 22b to be separated.

In some embodiments, the number of the limit connecting screws 13 may also be 2 or more, which are symmetrical about the center of the axle center of the hoop, and the interval between adjacent limit connecting screws 13 does not exceed 180 °, so as to avoid the deflection caused by the force applied to a single side during the flange separation process. In some preferred embodiments, the limit connecting screws 13 are arranged in a centrosymmetric manner to improve the balance of the flange flare adjusting device. In some preferred embodiments, the distance between at least one pair of limit connecting screws 13 in the device is larger than the outer diameter of the

flanges

22a and 22b to be separated, so that blind plate plugging and other operations can be performed, and the control of the distance between the limit connecting screws 13 can be realized by reasonably designing the length of the supporting arm 112. The flange opening adjusting device with the small spacing of the limiting connecting screw rods 13 cannot be used for blind plate plugging, but can still be used for flange bolt replacement and other operations.

In some embodiments, the adjusting

nuts

14a and 14b may be replaced by a screw or the like having an adjusting device for adjusting the position along the length direction of the limit connecting screw 13. In some preferred embodiments, a lubricating washer, such as an oiled metal washer, is disposed between the

adjustment nuts

14a, 14b and the second anchor ear 12 to reduce friction-induced damage to the parts.

In some alternative embodiments, the first and

second anchor ears

11 and 12 include first and second

semicircular sub-members

17 and 18, respectively, which are previously fixedly connected by the connecting bolt 16. The structure is convenient for the disassembly and assembly of the hoop, and meanwhile, the tightness of the hoop can be adjusted to a certain degree through the connecting bolt 16. In some preferred embodiments, the contact surfaces of the inner sides of the first sub-member 17 and the second sub-member 18 and the pipeline are provided with elastic gaskets to protect the pipe wall and increase the friction force, and the gaskets can be made of metal materials or non-metal materials such as engineering plastics, rubber or fiber fabrics.

In some embodiments, the first anchor ear 11 and the second anchor ear 12 are further provided with a plurality of positioning bolts 15, and the positioning bolts can pass through the first anchor ear 11 and the second anchor ear 12 to adjust the length of one end, so that the distance between the anchor ear and the flange can be quickly determined when the anchor ear is installed, and the anchor ear installation can be prevented from deviating or skewing. In the preferred embodiment, the positioning bolt 15 is mounted on the supporting arm 112 on the line connecting the limit connecting screw 13 and the anchor ear axis, so as to better position the fixed position of the limit connecting screw 13.

Taking the blind plate plugging operation of a low-temperature pressure pipeline of a certain LNG storage tank as an example, the use method of the flange opening adjusting device is as follows:

first, a corresponding flange-opening adjusting device is selected according to the diameter of the pipe 21. Firstly, a first anchor ear 11 and a second anchor ear 12 are installed, a first sub-piece 17 and a second sub-piece 18 are butted, the clamping part 111 is made to be attached to the outer wall of the pipeline 21, and the sub-pieces of the first anchor ear 11 and the second anchor ear 12 are respectively and primarily connected through a connecting bolt 16. And installing a limiting connecting screw rod 13, enabling the limiting connecting screw rod to sequentially pass through the first hoop 11 and the second hoop 12, and screwing a locking nut 19 to enable the limiting connecting screw rod 13 and the first hoop 11 to be relatively fixed. The lengths of the parts, penetrating through the first anchor ear 11 and the second anchor ear 12, of the positioning bolts 15 are adjusted to enable the penetrating lengths of the positioning bolts 15 to be the same, the positions of the first anchor ear 11 and the second anchor ear 12 are adjusted to enable the tail ends of the positioning bolts 15 to be abutted to the end faces of the flange 22a and the flange 22b together, so that the axial consistency of the first anchor ear 11 and the second anchor ear 12 with the pipeline 21 is ensured, and the installation deviation is avoided. The connecting bolt 16 is tightened to clamp the pipeline 21 by the first hoop 11 and the second hoop 12.

And then, carrying out blind plate plugging removal operation. It is assumed that the

flanges

22a, 22b are spaced from each other without bolting, but that the spacing is less than the blind thickness. First, the adjusting nuts 14a and 14b are screwed to abut against the two end faces of the second anchor ear 12, respectively, and the bolts 23 on the

flanges

22a and 22b are removed according to the operating rules. After the disassembly is completed, each adjusting nut 14b is rotated to move in a direction away from the first anchor ear 11, so that the

flanges

22a and 22b are separated from each other to a natural distance, and the adjusting nut 14b is continuously rotated to have a sufficient gap with the second anchor ear 12. The adjusting nuts 14a are rotated to abut against and push the second anchor ear 12 to move in a direction away from the first anchor ear 11. At this time, because the anchor ear is clamped on the pipeline 21, the

flanges

22a and 22b are continuously away from each other under the action of the flange opening adjusting device until the interval meets the blind plate plugging operation requirement, the inserting plate 24 is quickly inserted between the

flanges

22a and 22b, the adjusting nut 14a is rotated to enable the first anchor ear 11 and the second anchor ear 12 to be close to each other until no gap exists between the inserting plate 24 and the

flanges

22a and 22b, and the bolt 23 is installed again to complete the operation.

The removal of the plug board 24 can be accomplished by reversing the above steps using the apparatus.

The flange opening adjusting device can realize blind plate plugging operation of the LNG storage tank pipeline without stopping the pipeline, shortens the field operation time from 220 seconds to within 45 seconds, greatly reduces the NG gas leakage time of an operation field, and effectively improves the safety of construction operation.

The above embodiments are intended to explain the technical idea of the present invention in further detail by referring to the drawings, and are not intended to limit the present invention. Within the scope of the claims of the present invention, the optimization or equivalent replacement of the related component structures, and the combination of the embodiments in different embodiments without conflict between the structure and principles, all fall within the protection scope of the present invention.

Claims

1. A flange opening adjusting device is characterized by comprising a hoop, a limit connecting screw rod and an adjusting device,

the hoops comprise a first hoop and a second hoop, and the first hoop and the second hoop are respectively used for clamping pipelines on two sides of the flange to be separated;

the plurality of limiting connecting screw rods sequentially penetrate through the first hoop and the second hoop along the axial direction of the hoop and are fixedly connected with the first hoop, and the interval between every two adjacent limiting connecting screw rods is not more than 180 degrees;

the adjusting device is used for adjusting the relative position of the limiting connecting screw rod and the second hoop so as to adjust the distance between the first hoop and the second hoop.

2. The flange flare adjusting device according to claim 1, wherein the limit connecting screws are symmetrically arranged about an axial center of the hoop.

3. The device for adjusting the opening degree of a flange as claimed in claim 1 or 2, wherein the number of the limit connecting screws is 4, and the limit connecting screws are arranged at equal intervals.

4. The flange flaring device of claim 1 or 2, wherein the distance between at least one pair of limiting connecting screws is larger than the outer diameter of the flange to be separated.

5. The device according to claim 1, wherein said adjusting device is configured as an adjusting nut threaded onto said limit connecting screw.

6. The flange flare adjusting device according to claim 5, wherein a lubricating washer is arranged between the adjusting nut and the second anchor ear.

7. The device for adjusting the opening of a flange according to claim 1 or 2, wherein the first and second hoops respectively comprise two semicircular hoop components, and the hoop components are fastened by bolts.

8. A flange opening adjusting device according to claim 7, wherein a gasket with elasticity is arranged on the contact surface of the hoop member and the pipeline.

9. The device for adjusting the opening of a flange according to claim 1 or 2, further comprising a plurality of positioning bolts, wherein the plurality of positioning bolts are respectively arranged on the hoop in a penetrating manner and abut against the end surface of the flange to be separated so as to position the hoop and the flange to be separated.

10. A flange opening adjusting device according to claim 9, wherein the positioning bolt is disposed on a connecting line between the limit connecting screw and the axle center of the hoop.