阅读说明：本技术 一种鼎式三维膨胀节 (Tripod type three-dimensional expansion joint ) 是由 王珂 王鹏程 张海伟 李丽锋 姜平 赵保国 刘立宇 郭曾旭 单霄飞 于 2019-11-12 设计创作，主要内容包括：本发明公开了一种鼎式三维膨胀节,包括第一连接法兰,通过弹簧结构与第一连接法兰相连的第二连接法兰,与第一连接法兰固定相连并穿过第二连接法兰的伸缩管,设置于第二连接法兰上的伸缩管盘根盒,设置于伸缩管盘根盒内的伸缩管密封盘根,以及与第二连接法兰相接的容置管；其中,容置管与第二连接法兰相接的一端设有径向密封盘根,另一端设有外接管线的第三连接法兰,容置管的内径大于伸缩管的外径。本发明安装在管线中时,可以通过伸缩管的轴向上的伸缩移动,同时也通过伸缩管在容置管内的径向位移,实现了管线在径向和轴向上的三维补偿,大大的提升了管线的补偿效果。(The invention discloses a tripod type three-dimensional expansion joint which comprises a first connecting flange, a second connecting flange connected with the first connecting flange through a spring structure, a telescopic pipe fixedly connected with the first connecting flange and penetrating through the second connecting flange, a telescopic pipe packing box arranged on the second connecting flange, a telescopic pipe sealing packing arranged in the telescopic pipe packing box, and a containing pipe connected with the second connecting flange; wherein, the one end that the holding pipe meets with second flange is equipped with radial seal packing, and the other end is equipped with the third flange of external pipeline, and the internal diameter of holding pipe is greater than the external diameter of flexible pipe. When the pipeline compensator is installed in a pipeline, the pipeline can be three-dimensionally compensated in the radial direction and the axial direction through the axial telescopic movement of the telescopic pipe and the radial displacement of the telescopic pipe in the accommodating pipe, so that the compensation effect of the pipeline is greatly improved.)

1. A tripod type three-dimensional expansion joint is characterized in that: the device comprises a first connecting flange (1), a second connecting flange (2) connected with the first connecting flange (1) through a spring structure, a telescopic pipe (3) fixedly connected with the first connecting flange (1) and penetrating through the second connecting flange (2), a telescopic pipe packing box (4) arranged on the second connecting flange (2), a telescopic pipe sealing packing (5) arranged in the telescopic pipe packing box (4), and an accommodating pipe (6) connected with the second connecting flange (2); one end of the accommodating pipe (6) connected with the second connecting flange (2) is provided with a radial sealing packing (7), the other end of the accommodating pipe is provided with a third connecting flange (8) externally connected with a pipeline, and the inner diameter of the accommodating pipe (6) is larger than the outer diameter of the telescopic pipe (3).

2. The tripod type three-dimensional expansion joint of claim 1, wherein: and the first connecting flange (1), the second connecting flange (2), the telescopic pipe packing box (4) and the outer wall of the accommodating pipe (6) are all provided with cooling coils (9).

3. The tripod type three-dimensional expansion joint of claim 2, wherein: and the second connecting flange (2) is communicated with a cooling coil (9) on the telescopic tube packing box (4).

4. A tripod type three-dimensional expansion joint according to claim 2 or 3, wherein: and the cooling coil (9) on the accommodating pipe (6) is spirally arranged around the accommodating pipe (6), or is arranged on the accommodating pipe (6) in an S shape.

5. A tripod type three-dimensional expansion joint according to claim 1 or 2, wherein: the spring structure is arranged between the first connecting flange (1) and the second connecting flange (2) in an evenly distributed mode and provided with at least three groups.

6. The tripod type three-dimensional expansion joint of claim 6, wherein: the spring structure comprises a first spring sleeve (10) fixed on the first connecting flange (1), a second spring sleeve (11) fixed on the second connecting flange (2), and a spring (12) arranged in the first spring sleeve (10) and the second spring sleeve (11); wherein the inner diameter of the first spring sleeve (10) is larger than the outer diameter of the second spring sleeve (11), or the outer diameter of the first spring sleeve (10) is smaller than the inner diameter of the second spring sleeve (11).

7. The tripod type three-dimensional expansion joint of claim 6, wherein: still be equipped with the internal thread in first spring sleeve (10), just the internal thread sets and is used for adjusting spring compression strength's adjusting screw.

8. The tripod type three-dimensional expansion joint of claim 1, wherein: the accommodating pipe (6) and one end that second flange (2) meet are equipped with spacing platform (12), radial seal packing (7) cover is established on spacing platform (12), just the thickness of radial seal packing (7) is greater than the height of spacing platform.

Technical Field

The invention relates to the technical field of process pipelines, in particular to a tripod type three-dimensional expansion joint.

Background

In the operation process of the process pipeline, temperature difference often occurs in media in the process pipeline, due to the characteristic that the pipeline expands with heat and contracts with cold, when the temperature difference occurs, the pipeline stretches and contracts in length, and in order to compensate the stretching and contracting caused by the temperature difference of the pipeline, a corresponding compensation pipe needs to be installed in the pipeline. The existing pipeline compensation device is usually realized by adopting a corrugated pipe expansion joint, although the general corrugated expansion joint device can meet the three-dimensional expansion requirement through corrugated expansion in principle, the defect is obvious, firstly, the expansion amount is completely completed depending on the compensation amount of expansion waves, so the installation height is very high, and the difficulty of field arrangement of equipment is large; secondly, the expansion joint has high temperature and is difficult to cool expansion waves, so that the expansion joint generally has hidden danger of thermal pollution and hidden danger of labor safety; in the prior art, a telescopic compensation pipe is adopted to solve the problem of expansion caused by heat and contraction caused by cold, but the telescopic compensation pipe can only realize telescopic compensation in the axial direction, cannot solve the problem of compensation in the radial direction and cannot form a three-dimensional compensation measure. In order to solve the problems of arrangement space and expansion joint temperature, the tripod type three-dimensional expansion joint is designed.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the tripod type three-dimensional expansion joint is used for realizing axial and radial three-dimensional compensation in the process of expansion with heat and contraction with cold of a pipeline, solving the problem of space layout of a compensation device and solving the problem of high-temperature cooling of the compensation device.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a tripod type three-dimensional expansion joint comprises a first connecting flange, a second connecting flange connected with the first connecting flange through a spring structure, a telescopic pipe packing box, a telescopic pipe sealing packing and a containing pipe, wherein the telescopic pipe packing box is arranged on the second connecting flange; one end of the accommodating pipe, which is connected with the second connecting flange, is provided with a radial sealing packing, the other end of the accommodating pipe is provided with a third connecting flange which is externally connected with a pipeline, and the inner diameter of the accommodating pipe is larger than the outer diameter of the telescopic pipe.

Furthermore, the first connecting flange, the second connecting flange, the telescopic pipe packing box and the outer wall of the containing pipe are all provided with cooling coils.

Further, the second connecting flange is communicated with a cooling coil on the telescopic pipe packing box.

Furthermore, the cooling coil on the accommodating pipe is spirally arranged around the accommodating pipe, or is arranged on the accommodating pipe in an S shape.

Further, the spring structure is provided with at least three groups between the first connecting flange and the second connecting flange in an evenly distributed manner.

Specifically, the spring structure comprises a first spring sleeve fixed on the first connecting flange, a second spring sleeve fixed on the second connecting flange, and springs arranged in the first spring sleeve and the second spring sleeve; wherein the inner diameter of the first spring sleeve is larger than the outer diameter of the second spring sleeve, or the outer diameter of the first spring sleeve is smaller than the inner diameter of the second spring sleeve.

Furthermore, an internal thread is further arranged in the first spring sleeve, and the internal thread is provided with an adjusting screw rod for adjusting the compression strength of the spring.

Furthermore, the holding pipe with the one end that second flange meets is equipped with spacing platform, radial seal packing cover is established spacing bench, just radial seal packing's thickness is greater than spacing platform's height.

Compared with the prior art, the invention has the following beneficial effects:

(1) when the tripod type three-dimensional expansion joint is arranged in a pipeline, the extension pipe can extend and retract along the axial direction under the sealing action of the extension pipe sealing packing when the pipeline expands with heat and contracts with cold, so that the axial extension compensation is realized, and simultaneously, after the pipeline has radial displacement, because the inner diameter of the telescopic pipe is smaller than that of the containing pipe, under the action of radial force, the telescopic pipe and the containing pipe generate relative displacement, meanwhile, the arrangement of the radial sealing packing and the arrangement of the spring structure transmit the elastic acting force to the second connecting flange through the support of the first connecting flange, so that the second connecting flange always keeps an extrusion acting force with the radial sealing packing to realize sealing, therefore, radial compensation is realized, the tripod type three-dimensional expansion joint realizes radial and axial three-dimensional compensation of the pipeline, and the compensation effect of the pipeline is greatly improved.

(2) The first connecting flange, the second connecting flange, the telescopic tube packing box and the outer wall of the accommodating tube are respectively provided with the cooling coil, the cooling coil is externally connected with the circulating pipeline, and the expansion joint is cooled at the temperature by introducing cooling water into the pipeline, so that the service life of each part of the expansion joint is greatly ensured, and the effect of compensation sealing is greatly ensured.

(3) The spring structure is provided with the adjusting screw rod, and the position of the adjusting screw rod in the first spring sleeve is adjusted through the adjusting screw rod, so that the compression elasticity of the spring is adjusted, and the use rationality of the spring is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of the structure of the present invention.

FIG. 2 is a schematic view of the structure of the present invention.

Wherein, the names corresponding to the reference numbers are:

1-a first connecting flange, 2-a second connecting flange, 3-a telescopic pipe, 4-a telescopic pipe packing box, 5-a telescopic pipe sealing packing, 6-a containing pipe, 7-a radial sealing packing, 8-a third connecting flange, 9-a cooling coil, 10-a first spring sleeve, 11-a second spring sleeve and 12-a spring.

Detailed Description

The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.

As shown in FIGS. 1-2:

the utility model provides a three-dimensional expansion joint of tripod type, includes flexible tub of structure part and holding tube structure part, and the flexible tub of structure can insert in the holding tube structure, and the internal diameter of holding tube structure is greater than the external diameter of flexible tub of structure, and the flexible tub of structure can produce displacement in holding tube structure axial and radial two directions and remove to realize pipeline radial and the ascending three-dimensional compensation of axial. The concrete structure is as follows: the telescopic pipe structure comprises a telescopic pipe 3, one end of the telescopic pipe 3 is fixedly connected with a first connecting flange 1, and the first connecting flange 1 is used for connecting with a pipeline needing compensation; first flange 1 is connected with second flange 2 through a plurality of spring structure, and in order to guarantee the stability of first flange 1 and 2 leg joint efforts of second flange, spring structure is equipped with three groups at least, and is evenly distributed's mode. The spring structure can be arranged in various ways as long as the compression acting force of the spring between the first connecting flange and the second connecting flange can be ensured; preferably, the concrete components of the spring structure include a first spring sleeve 10 fixed on the first connecting flange 1, a second spring sleeve 11 fixed on the second connecting flange 2, and a spring 12 disposed in the first spring sleeve 10 and the second spring sleeve 11; the inner diameter and the outer diameter of the first spring sleeve 10 and the second spring sleeve 11 are different in size, and the first spring sleeve 10 and the second spring sleeve 11 can be inserted into each other in a specific mode that the inner diameter of the first spring sleeve 10 is larger than the outer diameter of the second spring sleeve 11, or the outer diameter of the first spring sleeve 10 is smaller than the inner diameter of the second spring sleeve 11. The arrangement of the spring sleeves can ensure that the spring has relatively stable compression elasticity in the spring sleeves so as to improve the action stability of the elasticity, and meanwhile, the two spring sleeves are arranged in a mode of entering each other, so that the compression range of the spring can be further improved. Meanwhile, in order to increase the elastic force adjusting range of the spring again, an internal thread may be arranged on the inner wall of the first spring sleeve 10, and an adjusting screw is provided, so that the adjustment of the magnitude of the compression acting force of the spring is realized by setting different positions of the adjusting screw in the first spring sleeve 10, and the adjusting screw is used for adjusting different expansion and contraction magnitudes of pipelines.

In order to realize the sealing between the telescopic pipe 3 and the second connecting flange 2, a telescopic pipe packing box 4 is arranged on the second connecting flange 2, a telescopic pipe sealing packing 5 is arranged in the telescopic pipe packing box 4, and the telescopic pipe packing 5 and the telescopic pipe 3 are extruded to realize the sealing between the telescopic pipe packing box and the telescopic pipe.

The containing tube structure comprises a radial sealing packing 7 for sealing with the second connecting flange 2, a containing tube 6 for containing the telescopic tube 3 for a telescopic moving space of the telescopic tube, a third connecting flange 8 arranged at one end of the containing tube 6, wherein the third connecting flange 8 is used for externally connecting a pipeline to be compensated, in order to ensure that the telescopic tube 3 can realize axial and radial displacement movement in the containing tube 6, the inner diameter of the containing tube 6 is larger than the outer diameter of the telescopic tube 3, and a large enough gap is ensured to be generated between the two to ensure enough radial displacement; simultaneously, in order to carry out spacingly to radial seal packing 7, avoid radial seal packing to slide at will, be equipped with spacing platform 12 in the one end that holding pipe 6 and second flange 2 meet, radial seal packing 7 cover is established on spacing platform 12, and radial seal packing 7's thickness is greater than the height of spacing platform, and radial seal packing 7 is spacing through spacing of spacing platform 12, has guaranteed that spacing packing is spacing at a fixed position, avoids radial seal packing to slide at will. The limiting table can also be set into a limiting groove form, and the radial sealing packing can be placed in the limiting groove to limit the radial sealing packing.

In order to realize the timely cooling of the expansion joint and prolong the service life of each part of the expansion joint at high temperature, the outer walls of the first connecting flange 1, the second connecting flange 2, the telescopic pipe packing box 4 and the accommodating pipe 6 are respectively provided with a cooling coil 9, each cooling coil is provided with a water inlet and a water outlet, and when the water inlets and the water outlets are respectively externally connected with a circulating pipeline, the circulating water supply of the circulating pipeline is carried out to realize the cooling of each part of the expansion joint and prolong the service life of each part of the expansion joint. Meanwhile, in order to reduce the arrangement of the water inlet and the water outlet, the second connecting flange 2 and the cooling coil 9 on the telescopic tube packing box 4 can be communicated with each other, so that the two can function as the water inlet and the water outlet. The cooling coil on the accommodating tube 6 may be disposed in various manners, such as a spiral manner around the accommodating tube 6, or an S-shaped configuration closely attached to the accommodating tube 6.

The principle of the invention is as follows: when installing extension tube structure part and holding tube structure part in the pipeline that needs the compensation, the spring compressive force among the spring structure makes second flange keep an extrusion effort with radial seal packing always and realizes sealedly, thereby also can produce radial displacement under the effect of radial force simultaneously and realize radial ascending compensation, and the flexible pipe can produce the displacement along the axial direction under the sealed effect of flexible pipe seal packing to realize the ascending compensation of axial.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.