Combined multi-way end face sealing rotary compensator
阅读说明：本技术 组合式多道端面密封旋转补偿器 (Combined multi-way end face sealing rotary compensator ) 是由 潘文浩 于 2019-09-14 设计创作，主要内容包括：本发明创造涉及组合式多道端面密封旋转补偿器,包括旋转座、旋转芯管和填料压盖,密封腔内设有密封填料,旋转座内壁设有内凸环,旋转芯管右端设有台阶形外凸台,外凸台与内凸环之间的装配间隙位于密封腔底部中间位置；旋转芯管外凸台至少设有两级台阶,台阶侧面与内凸环之间嵌设有端面密封环。密封填料包括压变式金属环和非金属柔性填料,压变式金属环在外力作用下产生径向扩张和变形,其内外两侧边与密封腔侧壁紧密配合。本发明旋转芯管外凸台与外套管内凸环之间设有多级端面密封环,密封环随着管道介质压力的变化形成正相关自密封作用,从而达到增强密封的效果。本发明具有较强耐高温、高压性能,密封效果好,使用寿命长,安装方便。(The invention relates to a combined multi-channel end face sealing rotary compensator which comprises a rotary seat, a rotary core pipe and a packing gland, wherein sealing packing is arranged in a sealing cavity; the outer boss of the rotating core pipe is at least provided with two steps, and an end face sealing ring is embedded between the side face of each step and the inner convex ring. The sealing packing comprises a pressure variable metal ring and a nonmetal flexible packing, the pressure variable metal ring radially expands and deforms under the action of external force, and the inner side and the outer side of the pressure variable metal ring are tightly matched with the side wall of the sealing cavity. According to the invention, the multistage end face sealing ring is arranged between the outer boss of the rotating core pipe and the inner collar of the outer sleeve, and the sealing ring forms positive correlation self-sealing action along with the change of medium pressure of a pipeline, so that the effect of enhancing sealing is achieved. The invention has the advantages of strong high temperature and high pressure resistance, good sealing effect, long service life and convenient installation.)
1. The utility model provides a modular multichannel end face seal rotary compensator, includes roating seat, rotatory core pipe and gland, and rotatory core pipe box is established in the roating seat, and gland's terminal surface constitutes the sealed chamber of packing with the internal surface of roating seat, the surface of rotatory core pipe, and sealed intracavity is equipped with sealing filler, characterized by: an inner convex ring is arranged on the inner wall of the rotating seat, a step-shaped outer boss matched with the inner convex ring is arranged at the right end of the rotating core pipe, and an assembly gap formed between the outer boss and the inner convex ring is positioned in the middle of the bottom of the sealing cavity;
the outer boss of the rotating core pipe is at least provided with two steps, and an end face sealing ring is embedded between the side face of each step and the opposite face of the inner convex ring.
2. The combined multi-pass end face seal rotary compensator of claim 1, wherein: the sealing packing comprises a pressure variable metal ring and a nonmetal flexible packing, and the pressure variable metal ring radially expands and deforms under the action of external force to enable the inner side edge and the outer side edge of the pressure variable metal ring to be tightly matched with the side wall of the sealing cavity; meanwhile, the pressure variable metal ring is tightly combined with the nonmetal flexible packing, so that the sealing effect is achieved.
3. The combined multi-pass end face seal rotary compensator of claim 2, wherein: the pressure-variable metal ring is formed by bending a hollow metal pipe or a metal sheet with a semicircular, arc-shaped or V-shaped section; the metal hollow pipe comprises a hollow round pipe or an oval hollow pipe.
4. The combined multi-pass end face seal rotary compensator of claim 2, wherein: the pressure-variable metal ring comprises a closed metal ring or a C-shaped metal ring with one side opened.
5. The combined multi-pass end face seal rotary compensator of claim 2, wherein: the sealing packing comprises at least two layers of variable metal rings and two layers of non-metal flexible packing, wherein the first variable metal ring is arranged at the bottom of the sealing cavity, and then the first non-metal flexible packing, the second variable metal ring and the second non-metal flexible packing are sequentially arranged.
6. The combined multi-pass end face seal rotary compensator of claim 5, wherein: the first pressure variable metal ring is formed by bending a hollow metal pipe, and the second pressure variable metal ring is formed by bending an arc-shaped or V-shaped metal sheet.
7. The combined multi-pass end face seal rotary compensator of claim 6, wherein: the first pressure variable metal ring is a closed metal ring with a welded port, and the second pressure variable metal ring is a C-shaped metal ring with an opening at one side.
8. The combined multi-pass end face seal rotary compensator of any of claims 2 to 7, wherein: the pressure-variable metal ring is a copper ring or an aluminum alloy ring, and the non-metal flexible packing is a graphite packing or an asbestos packing.
9. The combined multi-pass end face seal rotary compensator of claim 1, wherein: the outer boss of the rotating core pipe is provided with an upper step, a middle step and a lower step, and end face sealing rings which are respectively embedded between the side faces of the upper step and the middle step and the opposite face of the inner convex ring are metal plane sealing rings; the right end face of the rotating core pipe is set to be an arc-shaped face.
10. The combined multi-pass end face seal rotary compensator of claim 1, wherein: the rotary seat is an integrally formed integral structure reducer pipe, a left flange is arranged at the left end of the rotary seat, a conical pipe with the diameter gradually reduced is arranged at the right end of the rotary seat, and the packing gland and the left flange are connected and fixed through a bolt and nut assembly.
Technical Field
The invention relates to the technical field of pipeline compensators, in particular to a combined multi-channel end face sealing rotary compensator.
Background
The pipe compensator generally needs to adopt a sealing filler to keep the pipe sealed and prevent the medium from leaking. The existing sleeve compensator compensates the displacement of a pipeline through the extension of the sliding core pipe, the sealing between the sliding core pipe and the filler cannot keep a good state for a long time, and the leakage is easy to generate after long-term use. A sealing filler cavity is arranged between the inner pipe and the outer pipe of the rotary compensator, sealing filler is filled in the sealing cavity, and the sealing filler is compressed by a filler gland to realize sealing. The fit clearance is great between rotary compensator's the rotary part, receives pipeline thrust effect, and the poor stability of interior outer tube relative rotation easily produces the eccentric deflection of disalignment, increases the rotation resistance for wearing and tearing easily or by crushing in the high-pressure pipeline, can influence the sealing performance of sealing filler after using a period promptly, lead to sealed inefficacy, appear leaking. If the detection and the maintenance are not timely, safety production accidents can even be caused.
The existing pipeline compensator generally adopts graphite packing or asbestos packing as sealing packing, and has a good sealing effect under a common working condition. For pipelines for conveying high-temperature and high-pressure media, the packing materials are greatly lost in the deflection and displacement processes of the compensator due to the inevitable assembly clearance of the pipeline compensator and the lower strength of the traditional sealing packing and the action of the high-temperature and high-pressure media. On the other hand, the assembly gap of the conventional pipe compensator is usually designed to be tightly attached to the outer surface of the inner core pipe, and in the working process, a medium can permeate to the root of the sealing filler along the assembly gap, so that the sealing filler is accelerated to be lost and blown away. The labyrinth effect failure of the function of preventing the medium leakage is easily caused by the design, so that the loss of the sealing packing of the compensator is large, the leakage is easy, and the service life is prolonged.
Disclosure of Invention
The invention aims to provide a combined multi-channel end face sealing rotary compensator which has the advantages of strong high temperature and high pressure resistance, good sealing effect, flexible operation, long service life and convenient installation.
The purpose of the invention is realized by adopting the following technical scheme:
the combined type multi-end face sealing rotary compensator comprises a rotary seat, a rotary core pipe and a packing gland, wherein the rotary core pipe is sleeved in the rotary seat, the end face of the packing gland, the inner surface of the rotary seat and the outer surface of the rotary core pipe form a packing sealing cavity, sealing packing is arranged in the sealing cavity, an inner convex ring is arranged on the inner wall of the rotary seat, a stepped outer boss matched with the inner convex ring is arranged at the right end of the rotary core pipe, and an assembly gap formed between the outer boss and the inner convex ring is positioned in the middle of the bottom of the sealing cavity; the outer boss of the rotating core pipe is at least provided with two steps, and an end face sealing ring is embedded between the side face of each step and the opposite face of the inner convex ring.
As the preferred technical scheme of the invention, the sealing packing comprises a pressure variable metal ring and a nonmetal flexible packing, wherein the pressure variable metal ring radially expands and deforms under the action of external force, so that the inner side edge and the outer side edge of the pressure variable metal ring are tightly matched with the side wall of a sealing cavity in which the pressure variable metal ring is arranged; meanwhile, the pressure variable metal ring is tightly combined with the nonmetal flexible packing, so that the sealing effect is achieved.
As the preferred technical scheme of the invention, the pressure-variable metal ring is formed by bending a hollow metal pipe or a metal sheet with a semicircular, arc-shaped or V-shaped section; the metal hollow pipe comprises a hollow round pipe or an oval hollow pipe.
As a preferred technical scheme of the invention, the pressure-variable metal ring comprises a closed metal ring or a C-shaped metal ring with one side opened.
As a preferred technical scheme of the invention, the sealing filler comprises at least two layers of pressure-variable metal rings and two layers of non-metal flexible fillers, wherein the first pressure-variable metal ring is arranged at the bottom of the sealing cavity, and then the first non-metal flexible filler, the second pressure-variable metal ring and the second non-metal flexible filler are sequentially arranged.
In a preferred embodiment of the present invention, the first dilatant metal ring is formed by bending a hollow metal tube, and the second dilatant metal ring is formed by bending an arc-shaped or V-shaped metal piece.
In a preferred embodiment of the present invention, the first dilatant metal ring is a closed metal ring with a welded end, and the second dilatant metal ring is a C-shaped metal ring with an opening at one side.
As a preferred technical scheme of the invention, the pressure-variable metal ring is a copper ring or an aluminum alloy ring, and the non-metal flexible packing is a graphite packing or an asbestos packing.
As the preferred technical scheme of the invention, the outer boss of the rotating core pipe is provided with an upper step, a middle step and a lower step, and end face sealing rings respectively embedded between the side faces of the upper step and the middle step and the opposite face of the inner convex ring are metal plane sealing rings; the right end face of the rotating core pipe is set to be an arc-shaped face.
As a preferred technical scheme of the invention, the rotating seat is an integrally formed reducer pipe with an integral structure, the left end of the rotating seat is provided with a left flange, the right end of the rotating seat is provided with a conical pipe with the diameter gradually reduced, and the packing gland and the left flange are connected and fixed through a bolt-nut assembly.
The invention has the beneficial effects that: compared with the prior art, the invention adopts the pressing variable metal ring which is soft and easy to stretch and the nonmetal flexible packing to form the composite sealing structure under the action of external force, so that the metal ring and the flexible packing are expanded in the radial direction, and the edges of the inner side and the outer side of the metal ring and the flexible packing are tightly matched with the side wall of the sealing cavity; meanwhile, a multistage end face metal sealing ring is embedded between the outer boss of the rotating core pipe and the inner convex ring of the outer sleeve, and the multistage end face sealing ring can form positive correlation self-sealing effect along with the change of the medium pressure of the pipeline, so that the sealing effect is further enhanced.
When the compensator works, the multistage end face sealing ring and the pressure-variable metal ring can separate direct contact of high-temperature and high-pressure media and the flexible sealing filler, effectively reduce the loss of the flexible filler, and simultaneously achieve the effects of prolonging the service life of the sealing filler and strengthening sealing. The multistage metal sealing ring forms end face sealing in a pressure-bearing state, has small friction force and good sealing effect, and is favorable for flexible operation of the compensator. Not only forming end face seal, but also playing the roles of anti-drop and antifriction.
The invention has the advantages of strong high temperature and high pressure resistance, good sealing effect, large bearing strength, long service life and convenient installation. It is especially suitable for high temperature and high pressure heat distribution pipe network, and is safe and reliable in use, and favorable for energy saving and environment protection.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. the device comprises a rotary core pipe, 2, a packing gland, 3, a rotary seat, 4, a bolt and nut assembly, 5, a pressure variable metal ring, 6, an end face sealing ring, 7, a nonmetal flexible packing, 11, an outer boss, 31, a left flange, 32, an inner convex ring, 33 and a conical pipe.
Detailed Description
The invention will be further described with reference to the following detailed description of embodiments and with reference to the accompanying drawings in which:
as shown in fig. 1, the combined multi-channel end face sealing rotary compensator comprises a
In the embodiment, the sealing filler comprises a pressure variable metal ring 5 and a nonmetal flexible filler 7, and the pressure variable metal ring 5 radially expands and deforms under the action of external force, so that the inner side edge and the outer side edge of the pressure variable metal ring are tightly matched with the side wall of the sealing cavity; meanwhile, the pressure-variable metal ring 5 is tightly combined with the nonmetal flexible packing 7, so that the sealing effect is achieved. The pressure-variable metal ring 5 is formed by bending a metal hollow pipe or a metal sheet with a semicircular, arc-shaped or V-shaped section; the metal hollow pipe comprises a hollow round pipe or an oval hollow pipe. The pressure-variable metal ring 5 includes a closed metal ring or a C-shaped metal ring having one side opened.
The sealing filler comprises at least two layers of variable metal rings 5 and two layers of non-metal flexible fillers 7, wherein a first variable metal ring is arranged at the bottom of a sealing cavity, and then the first non-metal flexible filler, a second variable metal ring and a second non-metal flexible filler are sequentially arranged. The first pressure variable metal ring is formed by bending a hollow metal pipe, and the second pressure variable metal ring is formed by bending an arc-shaped or V-shaped metal sheet. The first pressure-variable metal ring is a closed metal ring with a welded port, and the second pressure-variable metal ring is a C-shaped metal ring with an opening at one side. The pressure-variable metal ring 5 is a copper ring or an aluminum alloy ring, and the non-metal flexible packing 7 is a graphite packing or an asbestos packing.
The
The above examples are only for illustrating the concept and technical features of the present invention, and are intended to enable those skilled in the art to understand the technical scheme and implementation manner of the present invention, and the protection scope of the present invention is not limited thereby. All equivalents and changes equivalent to the technical solution of the present invention should be covered within the protection scope of the present invention.
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