WO2021047670A1 - 金属压环复合密封填料装置及其制作方法 - Google Patents

金属压环复合密封填料装置及其制作方法 Download PDF

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Publication number
WO2021047670A1
WO2021047670A1 PCT/CN2020/115048 CN2020115048W WO2021047670A1 WO 2021047670 A1 WO2021047670 A1 WO 2021047670A1 CN 2020115048 W CN2020115048 W CN 2020115048W WO 2021047670 A1 WO2021047670 A1 WO 2021047670A1
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Prior art keywords
metal
ring
metal ring
packing
sealing packing
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PCT/CN2020/115048
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English (en)
French (fr)
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潘文浩
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江苏永力管道有限公司
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Priority to DE212020000700.4U priority Critical patent/DE212020000700U1/de
Publication of WO2021047670A1 publication Critical patent/WO2021047670A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/064—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions
    • F16J15/065—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions fire resistant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F16J15/20—Packing materials therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
    • F16L27/125—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement having longitudinal and rotary movement

Definitions

  • the invention relates to the technical field of pipeline packing sealing, in particular to a metal pressure ring composite sealing packing device and a manufacturing method thereof.
  • Packing seal is also called gland packing (Gland Packings) seal, commonly known as packing (Packings).
  • the mechanism of the packing seal is as follows: After the packing is loaded into the packing cavity, it is compressed axially by the gland. When the shaft and the packing move relative to each other, due to the plasticity of the packing, it generates radial force and is in close contact with the shaft. At the same time, the lubricant impregnated in the filler is squeezed out, forming an oil film between the contact surfaces.
  • the contact part will appear “boundary lubrication” state, which is called “bearing effect”; while the uncontacted concave part forms a small oil groove with a thicker oil film, and the contact part and the non-contact part form an irregularity
  • the labyrinth which plays a role in preventing the leakage of the medium, is called the “labyrinth effect”.
  • the sleeve type compensator compensates the displacement of the pipeline through the expansion and contraction of the sliding core tube.
  • the seal between the sliding core tube and the packing cannot be maintained in good condition for a long time. It is easy to leak afterwards.
  • a sealed packing cavity is arranged between the inner and outer pipes of the rotating compensator, and the sealed packing is installed in the sealed cavity, and the packing is compressed by the packing gland to achieve sealing.
  • the matching clearance between the rotating parts of the rotating compensator is large, and the relative rotation stability of the inner and outer pipes is poor due to the thrust of the pipeline, and it is easy to produce eccentric deflection of different shafts, which increases the rotation resistance.
  • the sealing performance of the sealing packing will be affected, resulting in sealing failure and leakage. If it is discovered and maintained not in time, it may even cause safety production accidents.
  • the existing pipeline compensator generally uses graphite packing or asbestos packing as the sealing filler, which has a better sealing effect under ordinary working conditions.
  • graphite packing or asbestos packing As the sealing filler, which has a better sealing effect under ordinary working conditions.
  • the deflection and displacement process of the packing material in the compensator The medium loss is relatively large. After a period of use, the "labyrinth effect" that prevents the leakage of the medium fails, causing the compensator to fail and leak.
  • the purpose of the present invention is to provide a metal pressure ring composite sealing packing device with strong high temperature resistance and high pressure performance, good sealing performance, high pressure bearing strength, long service life and convenient installation and a manufacturing method thereof.
  • the metal pressure ring composite sealing packing device includes a sealing cavity and a sealing packing.
  • the sealing packing is arranged in the sealing cavity.
  • the composite sealing packing device includes a metal ring and a non-metallic sealing packing.
  • the non-metallic sealing packing includes a graphite packing and a fiber disc.
  • the metal ring includes a closed metal ring or a C-shaped metal ring with one side opening; the metal ring is formed by bending a metal hollow tube, or is made of a semicircular, arc, or V-shaped metal cross section The metal ring is compressed by external force to flatten the metal ring, and expand and deform in the radial direction, so that the edges of the inner and outer sides of the metal ring are closely matched with the side wall of the sealed cavity. At the same time, the metal ring and the non- The metal seal packing is tightly combined to achieve the effect of strengthening the seal.
  • the composite sealing packing device includes at least two layers of metal rings and two layers of non-metallic sealing packing.
  • the first metal ring is arranged at the bottom of the sealed cavity, and the first non-metallic sealing packing is arranged on the first metal.
  • the second metal ring is arranged between the first non-metallic sealing packing and the second non-metallic sealing packing.
  • the first metal ring is formed by bending a metal hollow tube
  • the second metal ring is formed by bending a V-shaped metal sheet.
  • the first metal ring is a closed metal ring welded by a port
  • the second metal ring is a C-shaped metal ring with an opening on one side.
  • the metal ring is a copper ring or an aluminum alloy ring
  • the non-metallic sealing packing is graphite packing or asbestos packing.
  • the sealed cavity is composed of an inner core tube, an outer tube and a packing gland, the inner core tube is arranged in the outer tube, the inner wall of the outer tube is provided with an inner convex ring, and the end of the inner core tube is provided with There is a stepped outer flange matched with the inner convex ring, and the assembly gap formed between the outer flange and the inner convex ring is located at the middle position of the bottom of the sealed cavity.
  • the packing gland is press-fitted and connected with the non-metallic sealing packing through a metal ring.
  • a manufacturing method of a metal pressure ring composite sealing packing device includes the following steps:
  • the multiple metal rings include a first metal ring formed by bending a metal hollow tube, and a second metal ring formed by bending a semicircular or arc-shaped metal sheet. It is a third metal ring formed by bending a V-shaped metal sheet;
  • step (3) Place the first non-metallic sealing packing on the first metal ring of step (3), and then place the second metal ring.
  • the second metal ring is flattened and expanded and deformed by a special mold to make the second metal ring
  • the inner and outer edges are closely matched with the side walls of the sealed cavity;
  • the metal ring is a copper ring or an aluminum alloy ring
  • the non-metallic sealing packing is graphite packing or asbestos packing.
  • the beneficial effect of the present invention is that compared with the prior art, the present invention adopts a soft and easy-stretchable metal pressure ring and a non-metallic sealing packing to be compressed under the action of an external force to form a composite connection state, and at the same time to make the metal ring and the non-metallic sealing packing It is expanded in the radial direction, and the edges on both sides of the inner and outer sides are closely matched with the side wall of the sealed cavity or stuffing box, thus achieving the effect of strengthening the seal.
  • the metal pressure ring When working, the metal pressure ring is placed at the bottom of the sealed cavity, which can block the direct contact between high temperature and high pressure medium and the non-metallic sealing packing, effectively reducing the loss of the non-metallic sealing packing, and at the same time extending the service life of the sealing packing and strengthening the sealing effect.
  • the metal pressure ring forms an end face seal under pressure, with low friction and good sealing effect, which is conducive to the flexible operation of the compensator. It not only forms the end face seal, but also plays the role of anti-falling and anti-friction.
  • the invention has strong high temperature resistance and high pressure performance, good sealing performance, high pressure bearing strength, long service life and convenient installation. It is especially suitable for high temperature and high pressure heat pipe network, safe and reliable to use, and is conducive to energy saving and environmental protection.
  • Fig. 1 is a schematic diagram of the structure of the present invention.
  • Fig. 2 is a partial enlarged schematic diagram of A in Fig. 1.
  • Fig. 3 is a schematic cross-sectional view of the sealed cavity of the present invention.
  • Figure 4 is a schematic view of the structure of the closed metal ring of the present invention.
  • Fig. 5 is a schematic diagram of the structure of the split C-shaped metal ring of the present invention.
  • Fig. 6 is a schematic cross-sectional view of a metal ring with a V-shaped cross section.
  • Figure 7 is a schematic cross-sectional view of a metal ring with an arc-shaped cross-section.
  • Fig. 8 is a schematic cross-sectional view of the structure of a semicircular metal ring.
  • Fig. 9 is a gradual schematic diagram of the pressing process of the metal ring of the present invention.
  • the metal pressure ring composite sealing packing device includes a sealing cavity and a sealing packing.
  • the sealing packing is arranged in the sealing cavity.
  • the composite sealing packing device includes a metal ring 4 and a non-metallic sealing packing 5.
  • the metal sealing packing 5 includes graphite packing, fiber packing, and tetrafluoroethylene packing;
  • the metal ring 4 includes a closed metal ring or a C-shaped metal ring with one side opening;
  • the metal ring 4 is formed by bending a metal hollow tube, or It is formed by bending a semicircular, arc-shaped, and V-shaped metal sheet;
  • the metal ring 4 is compressed by external force to flatten the metal ring 4, and expand and deform in the radial direction, so that the inner and outer sides of the metal ring 4
  • the edge is closely matched with the side wall of the sealed cavity, and at the same time, the metal ring 4 is tightly combined with the non-metallic sealing packing 5, so as to achieve the effect of strengthening the sealing.
  • the composite sealing packing device of this embodiment includes four layers of metal rings 4 and three layers of non-metallic sealing packing 5.
  • the first metal ring is arranged at the bottom of the sealed cavity, and the first non-metallic sealing packing is arranged on the first metal.
  • the second metal ring is arranged between the first non-metallic sealing packing and the second non-metallic sealing packing, and the third metal ring, the third non-metallic sealing packing and the fourth metal are arranged on the second non-metallic sealing packing in sequence. ring.
  • the first metal ring is formed by bending a metal hollow tube, and the second to fourth metal rings are formed by bending a V-shaped metal sheet.
  • the first metal ring is a closed metal ring welded with a port, and the second to fourth metal rings are C-shaped metal rings with one side open.
  • the metal ring can flexibly adopt a hollow tube, or a structure with a semicircular, arc, or V-shaped cross section; the metal ring can also adopt a closed or C-shaped structure with one side open.
  • the metal ring 4 in this embodiment is a copper ring or an aluminum alloy ring, and the non-metallic sealing packing 5 is graphite packing or asbestos packing.
  • the sealed cavity is composed of an inner core tube 1, an outer tube 2 and a packing gland 3.
  • the inner core tube 1 is arranged in the outer tube 2, the inner wall of the outer tube 2 is provided with an inner convex ring 21, and the end of the inner core tube is provided with There is a stepped outer flange 11 matched with the inner convex ring 21, and the assembly gap 6 formed between the outer flange 11 and the inner convex ring 21 is located in the middle of the bottom of the sealed cavity.
  • the packing gland 3 is press-fitted and connected with the non-metallic sealing packing 5 through a metal ring 4.
  • the manufacturing method of the metal pressure ring composite sealing packing device includes the following steps:
  • the multiple metal rings include a first metal ring formed by bending a metal hollow tube, and a second metal ring formed by bending a semicircular or arc-shaped metal sheet. It is a third metal ring formed by bending a V-shaped metal sheet;
  • step (3) Place the first non-metallic sealing packing on the first metal ring of step (3), and then place the second metal ring.
  • the second metal ring is flattened and expanded and deformed by a special mold to make the second metal ring
  • the inner and outer edges are closely matched with the side walls of the sealed cavity;
  • the metal ring is a copper ring or an aluminum alloy ring
  • the non-metallic sealing packing is graphite packing or asbestos packing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)
  • Sealing Devices (AREA)

Abstract

一种金属压环复合密封填料装置，包括金属环（4）和非金属密封填料（5），金属环（4）包括封闭式金属环或一侧开口的C形金属环；金属环（4）由金属空心管，或者由截面为半圆形、弧形、V形的金属片弯曲构成；金属环（4）通过外力加压使金属环（4）压扁，并在径向扩张和变形，使金属环（4）内外两侧的边沿与所在密封腔的侧壁紧密配合。还包括上述金属压环复合密封填料装置的制作方法，包括：加工多个金属环，在密封腔底部放置第一金属环，通过专用模具将第一金属环压扁并扩张变形，第一金属环上面放置第一非金属密封填料，然后放置第二金属环，压扁并扩张变形。本装置及其制作方法具有较强耐高温、高压性能，密封性能好，承压强度大，使用寿命长。特别适用于高温、高压热力管网，使用安全可靠。

Description

金属压环复合密封填料装置及其制作方法 技术领域
本发明涉及管道填料密封技术领域，尤其是一种金属压环复合密封填料装置及其制作方法。
背景技术
填料密封又称为压盖填料(Gland Packings)密封，俗称盘根(Packings)。填料密封的机理如下：填料装入填料腔以后，经压盖对它作轴向压缩，当轴与填料有相对运动时，由于填料的塑性，使它产生径向力，并与轴紧密接触。与此同时，填料中浸渍的润滑剂被挤出，在接触面之间形成油膜。由于接触状态并不是特别均匀，接触部位便出现“边界润滑”状态，称为“轴承效应”；而未接触的凹部形成小油槽，有较厚的油膜，接触部位与非接触部位组成一道不规则的迷宫，起阻止介质泄漏的作用，此称“迷宫效应”。
现有套筒式补偿器和旋转补偿器都需要采用填料密封，套筒式补偿器通过滑动芯管的伸缩补偿管道的位移，滑动芯管与填料之间的密封不能持久保持良好状态，长期使用后容易产生泄漏。旋转补偿器的内外管之间设有密封填料腔，密封填料装进密封腔内，通过填料压盖压紧密封填料来实现密封。旋转补偿器的旋转部件之间配合间隙较大，受管道推力作用，内外管相对旋转的稳定性差，易产生不同轴偏心偏转，增加旋转阻力，用于高压管道中容易磨损或被压坏，使用一段时间后即会影响密封填料的密封性能，导致密封失效，出现泄漏。如果发现和维护不及时，甚至会引发安全生产事故。
现有管道补偿器一般采用石墨盘根或石棉盘根作为密封填料，在普通工况下具有较好的密封效果。对于输送高温、高压介质的管道来说，由于管道补偿 器不可避免的装配间隙以及传统密封填料强度较低的原因，加上高温、高压介质的作用，盘根材料在补偿器的偏转和位移过程中损耗较大，使用一段时间后，起阻止介质泄漏作用的“迷宫效应”失效，导致补偿器密封失效，出现泄漏。
发明内容
本发明的目的是提供一种具有较强耐高温、高压性能，密封性能好，承压强度大，使用寿命长，安装方便的金属压环复合密封填料装置及其制作方法。
本发明的目的是通过采用以下技术方案来实现的：
金属压环复合密封填料装置，包括密封腔和密封填料，密封填料设在密封腔内，所述复合密封填料装置包括金属环和非金属密封填料，非金属密封填料包括石墨盘根、纤维类盘根、四氟盘根；所述金属环包括封闭式金属环或一侧开口的C形金属环；金属环由金属空心管弯曲构成，或者由截面为半圆形、弧形、V形的金属片弯曲构成；所述金属环通过外力加压使金属环压扁，并在径向扩张和变形，使金属环内外两侧的边沿与所在密封腔的侧壁紧密配合，同时，金属环与非金属密封填料紧密结合，从而达到加强密封的效果。
作为本发明的优选技术方案，所述复合密封填料装置包括至少两层金属环和两层非金属密封填料，第一金属环设在密封腔的底部，第一非金属密封填料设在第一金属环的上面，第二金属环设在第一非金属密封填料与第二非金属密封填料之间。
作为本发明的优选技术方案，所述第一金属环由金属空心管弯曲构成，所述第二金属环由V形金属片弯曲构成。
作为本发明的优选技术方案，所述第一金属环是端口焊接的封闭式金属环，所述第二金属环是一侧开口的C形金属环。
作为本发明的优选技术方案，所述金属环是铜环或铝合金环，所述非金属 密封填料是石墨盘根或石棉盘根。
作为本发明的优选技术方案，所述密封腔由内芯管、外套管和填料压盖构成，内芯管设在外套管内，外套管的内壁设有内凸环，内芯管的端部设有与所述内凸环相配合的台阶形外凸缘，所述外凸缘与内凸环之间形成的装配间隙位于密封腔底部的中间位置。
作为本发明的优选技术方案，所述密封腔内设有四层金属环和三层非金属密封填料。
作为本发明的优选技术方案，所述填料压盖通过金属环与非金属密封填料压合连接。
金属压环复合密封填料装置的制作方法，所述制作方法包括以下步骤：
(1)按照图纸分别机加工内芯管、外套管和填料压盖，使得内芯管、外套管和填料压盖构成密封腔；
(2)按照图纸分别加工多个金属环，多个金属环包括由金属空心管弯曲构成的第一金属环，由截面为半圆形或弧形金属片弯曲构成的第二金属环，由截面为V形金属片弯曲构成的第三金属环；
(3)在密封腔的底部放置第一金属环，通过专用模具将第一金属环压扁并扩张变形，使第一金属环的内外侧边沿与密封腔的侧壁紧密配合；
(4)在步骤(3)的第一金属环上面放置第一非金属密封填料，然后再放置第二金属环，通过专用模具将第二金属环压扁并扩张变形，使第二金属环的内外侧边沿与密封腔的侧壁紧密配合；
(5)根据图纸要求分别在密封腔内依次放入第二非金属密封填料和第三金属环，通过专用模具将第三金属环压扁并扩张变形，使第三金属环的内外侧边 沿与密封腔的侧壁紧密配合；
(6)通过填料压盖将第三金属环与第二非金属密封填料压紧，形成紧密结合连接，从而达到加强密封的效果。
作为本发明的优选技术方案，所述金属环是铜环或铝合金环，所述非金属密封填料是石墨盘根或石棉盘根。
本发明的有益效果是：相对于现有技术，本发明采用软质易拉伸的金属压环与非金属密封填料在外力作用下压紧形成复合连接状态，同时使金属环及非金属密封填料在径向得到扩张，内外两侧的边沿与所在密封腔或填料函侧壁紧密配合，从而达到加强密封的效果。
工作时，金属压环放置在密封腔底部，能够阻隔高温、高压介质与非金属密封填料的直接接触，有效减少非金属密封填料的损耗，同时达到延长密封填料使用寿命和加强密封效果。金属压环在承压状态下形成端面密封，摩擦力小，密封效果好，有利于补偿器的灵活运转。既形成端面密封，又能起到防脱和减摩作用。
本发明具有较强耐高温、高压性能，密封性能好，承压强度大，使用寿命长，安装方便。特别适用于高温、高压热力管网，使用安全可靠，并且有利于节能和保护环境。
附图说明
图1是本发明的结构示意图。
图2是图1中A处的局部放大示意图。
图3是本发明密封腔的剖视结构示意图。
图4是本发明封闭式金属环的结构示意图。
图5是本发明开口式C形金属环的结构示意图。
图6是截面为V形的金属环剖视结构示意图。
图7是截面为弧形的金属环剖视结构示意图。
图8截面为半圆形的金属环剖视结构示意图。
图9是本发明金属环压制过程的渐变示意图。
图中：1、内芯管，2、外套管，3、填料压盖，4、金属环，5、非金属密封填料，6、装配间隙，11、台阶形外凸缘，21、内凸环。
具体实施方式
下面结合附图与具体实施例对本发明作进一步说明：
如图1至图9所示，金属压环复合密封填料装置，包括密封腔和密封填料，密封填料设在密封腔内，所述复合密封填料装置包括金属环4和非金属密封填料5，非金属密封填料5包括石墨盘根、纤维类盘根、四氟盘根；所述金属环4包括封闭式金属环或一侧开口的C形金属环；金属环4由金属空心管弯曲构成，或者由截面为半圆形、弧形、V形的金属片弯曲构成；所述金属环4通过外力加压使金属环4压扁，并在径向扩张和变形，使金属环4内外两侧的边沿与所在密封腔的侧壁紧密配合，同时，金属环4与非金属密封填料5紧密结合，从而达到加强密封的效果。
如图3所示，本实施例复合密封填料装置包括四层金属环4和三层非金属密封填料5，第一金属环设在密封腔的底部，第一非金属密封填料设在第一金属环的上面，第二金属环设在第一非金属密封填料与第二非金属密封填料之间，第二非金属密封填料上面依次设置第三金属环、第三非金属密封填料、第四金属环。
所述第一金属环由金属空心管弯曲构成，第二至第四金属环由V形金属片弯曲构成。第一金属环是端口焊接的封闭式金属环，第二至第四金属环是一侧 开口的C形金属环。根据不同的应用要求，金属环可以灵活采用空心管，或者截面为半圆形、弧形、V形的结构；金属环也可以采用封闭式或一侧开口的C形结构。
本实施例所述金属环4是铜环或铝合金环，非金属密封填料5是石墨盘根或石棉盘根。所述密封腔由内芯管1、外套管2和填料压盖3构成，内芯管1设在外套管2内，外套管2的内壁设有内凸环21，内芯管的端部设有与所述内凸环21相配合的台阶形外凸缘11，所述外凸缘11与内凸环21之间形成的装配间隙6位于密封腔底部的中间位置。所述填料压盖3通过金属环4与非金属密封填料5压合连接。
金属压环复合密封填料装置的制作方法，包括以下步骤：
(1)按照图纸分别机加工内芯管、外套管和填料压盖，使得内芯管、外套管和填料压盖构成密封腔；
(2)按照图纸分别加工多个金属环，多个金属环包括由金属空心管弯曲构成的第一金属环，由截面为半圆形或弧形金属片弯曲构成的第二金属环，由截面为V形金属片弯曲构成的第三金属环；
(3)在密封腔的底部放置第一金属环，通过专用模具将第一金属环压扁并扩张变形，使第一金属环的内外侧边沿与密封腔的侧壁紧密配合；
(4)在步骤(3)的第一金属环上面放置第一非金属密封填料，然后再放置第二金属环，通过专用模具将第二金属环压扁并扩张变形，使第二金属环的内外侧边沿与密封腔的侧壁紧密配合；
(5)根据图纸要求分别在密封腔内依次放入第二非金属密封填料和第三金属环，通过专用模具将第三金属环压扁并扩张变形，使第三金属环的内外侧边 沿与密封腔的侧壁紧密配合；
(6)通过填料压盖将第三金属环与第二非金属密封填料压紧，形成紧密结合连接，从而达到加强密封的效果。
本实施例中，所述金属环是铜环或铝合金环，所述非金属密封填料是石墨盘根或石棉盘根。
上述实施例仅限于说明本发明的构思和技术特征，其目的在于让本领域的技术人员了解发明的技术方案和实施方式，并不能据此限制本发明的保护范围。凡是根据本发明技术方案所作的等同替换或等效变化，都应涵盖在本发明的保护范围之内。

Claims (10)

  1. 一种金属压环复合密封填料装置，包括密封腔和密封填料，密封填料设在密封腔内，其特征是：所述复合密封填料装置包括金属环和非金属密封填料，非金属密封填料包括石墨盘根、纤维类盘根、四氟盘根；
    所述金属环包括封闭式金属环或一侧开口的C形金属环；金属环由金属空心管弯曲构成，或者由截面为半圆形、弧形、V形的金属片弯曲构成；
    所述金属环通过外力加压使金属环压扁，并在径向扩张和变形，使金属环内外两侧的边沿与所在密封腔的侧壁紧密配合，同时，金属环与非金属密封填料紧密结合，从而达到加强密封的效果。
  2. 根据权利要求1所述的金属压环复合密封填料装置，其特征是：所述复合密封填料装置包括至少两层金属环和两层非金属密封填料，第一金属环设在密封腔的底部，第一非金属密封填料设在第一金属环的上面，第二金属环设在第一非金属密封填料与第二非金属密封填料之间。
  3. 根据权利要求2所述的金属压环复合密封填料装置，其特征是：所述第一金属环由金属空心管弯曲构成，所述第二金属环由V形金属片弯曲构成。
  4. 根据权利要求3所述的金属压环复合密封填料装置，其特征是：所述第一金属环是端口焊接的封闭式金属环，所述第二金属环是一侧开口的C形金属环。
  5. 根据权利要求2所述的金属压环复合密封填料装置，其特征是：所述金属环是铜环或铝合金环，所述非金属密封填料是石墨盘根或石棉盘根。
  6. 根据权利要求1所述的金属压环复合密封填料装置，其特征是：所述密封腔由内芯管、外套管和填料压盖构成，内芯管设在外套管内，外套管的内壁设有内凸环，内芯管的端部设有与所述内凸环相配合的台阶形外凸缘，所述外 凸缘与内凸环之间形成的装配间隙位于密封腔底部的中间位置。
  7. 根据权利要求6所述的金属压环复合密封填料装置，其特征是：所述密封腔内设有四层金属环和三层非金属密封填料。
  8. 根据权利要求7所述的金属压环复合密封填料装置，其特征是：所述填料压盖通过金属环与非金属密封填料压合连接。
  9. 一种如权利要求1至8任一项所述金属压环复合密封填料装置的制作方法，其特征是：所述制作方法包括以下步骤：
    (1)按照图纸分别机加工内芯管、外套管和填料压盖，使得内芯管、外套管和填料压盖构成密封腔；
    (2)按照图纸分别加工多个金属环，多个金属环包括由金属空心管弯曲构成的第一金属环，由截面为半圆形或弧形金属片弯曲构成的第二金属环，由截面为V形金属片弯曲构成的第三金属环；
    (3)在密封腔的底部放置第一金属环，通过专用模具将第一金属环压扁并扩张变形，使第一金属环的内外侧边沿与密封腔的侧壁紧密配合；
    (4)在步骤(3)的第一金属环上面放置第一非金属密封填料，然后再放置第二金属环，通过专用模具将第二金属环压扁并扩张变形，使第二金属环的内外侧边沿与密封腔的侧壁紧密配合；
    (5)根据图纸要求分别在密封腔内依次放入第二非金属密封填料和第三金属环，通过专用模具将第三金属环压扁并扩张变形，使第三金属环的内外侧边沿与密封腔的侧壁紧密配合；
    (6)通过填料压盖将第三金属环与第二非金属密封填料压紧，形成紧密结合连接，从而达到加强密封的效果。
  10. 根据权利要求9所述的金属压环复合密封填料装置的制作方法，其特征是：所述金属环是铜环或铝合金环，所述非金属密封填料是石墨盘根或石棉盘根。
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