CN109630795B - PP/PPH/PPS/PE soft ripple compensator - Google Patents

PP/PPH/PPS/PE soft ripple compensator Download PDF

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CN109630795B
CN109630795B CN201811357709.1A CN201811357709A CN109630795B CN 109630795 B CN109630795 B CN 109630795B CN 201811357709 A CN201811357709 A CN 201811357709A CN 109630795 B CN109630795 B CN 109630795B
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wall
corrugated
supporting
antioxidant
distance
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CN109630795A (en
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刘星
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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
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/03—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube comprising two or more bellows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/112—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having reinforcements embedded in the wall
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • 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
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/025—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with several corrugations
    • 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
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/026—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with interior reinforcement
    • 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
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/027—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with external reinforcement

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention provides a PP/PPH/PPS/PE soft corrugated plate, which comprises two connecting flanges or socket sleeves and a soft corrugated compensator welded and fixed between the two connecting flanges or socket sleeves; wherein, the soft corrugated plate comprises the following components in percentage by mass: SEBS: 63-67%, linear low density polyethylene: 28-32% and antioxidant: 0.5-1.2%, color master batch: the balance; the soft corrugated plate can be directly welded with PP, PPH, PPS or PE materials, can be freely butted according to the caliber of a user ventilation pipeline, is convenient to operate, good in welding firmness, good in stability, corrosion-resistant and high-temperature-resistant, and prolongs the service life of the compensator.

Description

PP/PPH/PPS/PE soft ripple compensator
Technical Field
The invention relates to a ripple compensator, in particular to a PP/PPH/PPS/PE soft ripple compensator.
Background
The corrugated compensator is mainly used for absorbing pipeline accessories of the ventilating pipeline which expands with heat and contracts with cold, and due to the corrugated structure, the local resistance is large when a medium flows, and dirt is easy to deposit at the corrugated position, so that a lining flow guide sleeve is arranged in the corrugated compensator when necessary to reduce the resistance and the dirt deposition.
The existing corrugated compensator generally comprises a corrugated pipe and a connecting flange, wherein the corrugated pipe is welded and fixed on the connecting flange, but due to the limitation of materials, the welding effect of the existing corrugated pipe and the connecting flange is not ideal, and the corrugated pipe and the connecting flange are easy to loosen.
Disclosure of Invention
The invention provides a PP/PPH/PPS/PE soft corrugated compensator aiming at the problems, wherein the soft corrugated pipe can be directly welded with PP, PPH, PPS or PE materials, the operation is convenient, the welding firmness is good, the stability is good, the soft corrugated compensator is corrosion-resistant and high-temperature-resistant, and the service life of the compensator is prolonged.
The specific technical scheme is as follows:
the PP/PPH/PPS/PE soft corrugated compensator comprises two connecting flanges or socket sleeves and a soft corrugated pipe welded and fixed between the two connecting flanges or socket sleeves;
the soft corrugated pipe comprises the following components in percentage by mass:
SEBS：63-67％、
linear low density polyethylene: 28-32 percent,
Antioxidant: 0.5 to 1.2 percent of,
Color master batch: and (4) the balance.
Further, of linear low density polyethyleneThe density is 0.92-0.93g/cm3。
Further, the antioxidant is one or a mixture of two of antioxidant 1010 and antioxidant 168.
Further, the antioxidant is antioxidant 1010 and antioxidant 168, and the weight ratio of antioxidant 1010 to antioxidant 168 is 3: 1 by mass portion ratio.
Further, the preparation method of the soft ripple compensator comprises the following steps:
(1) stirring the SEBS, the linear low-density polyethylene, the antioxidant and the color master batch by a high-speed centrifugal stirrer, and then extruding and granulating in a particle extruder to obtain a particle raw material;
(2) extruding the granulated particle raw materials through an extruder, and performing water cooling molding to obtain a soft corrugated plate;
(3) and welding and fixing the soft corrugated plate on the connecting flange or the socket sleeve to obtain the soft corrugated compensator.
Furthermore, the flexible corrugated pipe comprises two outer fixed pipes, a plurality of outer corrugated structures are arranged between the outer fixed pipes and protrude outwards, and the two outer fixed pipes are respectively welded and fixed on the two connecting flanges.
Further, the outer corrugated structure comprises two outer supporting walls arranged in a mirror image mode and a top wall connected to the tops of the two outer supporting walls;
the two outer supporting walls are obliquely arranged, so that the distance between the two outer supporting walls is gradually increased from outside to inside, and the section of the top wall is of an arc-shaped structure;
the two outer corrugated structures are connected through a connecting wall, and the cross section of the connecting wall is of an arc-shaped structure protruding inwards, so that the cross section of each outer corrugated structure is of an S-shaped structure;
in a free state, the included angle a between the two outer supporting walls is 38 degrees, the distance between the inner sides of the two outer supporting walls is L1, the distance between the two adjacent outer corrugated structures is L2, L1 is greater than L2, and L1-L2 is less than 8 mm.
Furthermore, the outer corrugated structure comprises a first supporting wall and a second supporting wall which are arranged in a mirror image mode, the first supporting wall and the second supporting wall are arranged in an inclined mode, the section of the whole outer corrugated structure is of a V-shaped structure, and the distance between the first supporting wall and the second supporting wall gradually increases from outside to inside;
in a free state, an included angle c between the first supporting wall and the second supporting wall is 68 degrees, the distance between the inner sides of the first supporting wall and the second supporting wall is L5, the distance between two adjacent outer corrugated structures is L6, and L5 is L6.
Furthermore, the end face of the connecting flange is of a circular structure or a rectangular structure.
Furthermore, a connecting channel is arranged in the middle of the connecting flange, a transfer wall is vertically arranged on the inner ring of the connecting channel, and an inner corrugated pipe is fixed between the two transfer walls;
the inner corrugated pipe comprises two inner fixed pipes, and a plurality of inner corrugated structures are arranged between the two inner fixed pipes and protrude inwards;
the inner corrugated structure comprises two inner supporting walls arranged in a mirror image manner, and the two inner supporting walls are obliquely arranged, so that the distance between the two inner supporting walls is gradually reduced from outside to inside;
in a free state, an included angle b between the two inner supporting walls is 124 degrees, the distance between the inner sides of the two inner supporting walls is L3, the distance between the two adjacent inner corrugated structures is L4, L3 is L4, and L3 is L2L 1;
the tip of internal fixation pipe is perpendicular outside to be equipped with a plurality of connecting terminals, and connecting terminal passes the switching wall, locks fixedly through fastening structure, makes the internal fixation pipe press to be established on the inside wall of external fixation pipe.
Further, the height of the outer corrugated structure is h1, the height of the inner corrugated structure is h3, and h1 is h 3.
Further, the thickness of the outer support wall is h2, the thickness of the inner support wall is h4, and h2 is less than h 4.
Furthermore, the outer wall of the inner fixing pipe is provided with a plurality of fastening pressing blocks, and the fastening pressing blocks are of a circular truncated cone-shaped structure.
Furthermore, the fastening structure comprises a crimping ring, a crimping groove with an inward opening is formed in the crimping ring, the crimping ring is sleeved outside the transfer wall, the connecting terminal is inserted into the crimping groove, and the fastening structure is locked and fixed through a bolt and a nut.
Further, the inner corrugation structure comprises a stainless steel lining layer and a plastic protection layer coated and arranged on the outer portion of the stainless steel lining layer.
The invention has the beneficial effects that:
the outer wall of the S-shaped or V-shaped flexible corrugated pipe is welded and fixed on the connecting flange and is pressed between the connecting flange and the inner corrugated pipe, so that the S-shaped or V-shaped flexible corrugated pipe is convenient to install and good in connection stability;
the inner corrugated pipe effectively provides elastic supporting force for the S-shaped flexible corrugated pipe and can help the S-shaped flexible corrugated pipe to rebound;
the invention is suitable for the bidirectional flow of the medium, can prevent dirt from entering the corrugation, and improves the service life of the compensator;
in conclusion, the flexible corrugated pipe can be directly welded with PP, PPH, PPS or PE materials, is convenient to operate, good in welding firmness, good in stability, corrosion-resistant and high-temperature-resistant, and prolongs the service life of the compensator.
Drawings
Fig. 1 is a cross-sectional view of the present invention in a first embodiment and a second embodiment.
Fig. 2 is a partial cross-sectional view of the bellows of fig. 1.
Fig. 3 is an enlarged view of a portion a of fig. 1.
FIG. 4 is a partial cross-sectional view of the inner bellows of FIG. 1.
FIG. 5 is a cross-sectional view of an inner bellows.
Fig. 6 is a partial sectional view of a bellows according to a third embodiment of the present invention.
Detailed Description
In order to make the technical scheme of the invention clearer and clearer, the invention is further described with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent replacement and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention.
Description of the reference numerals
The corrugated pipe comprises a connecting flange 1, an S-shaped flexible corrugated pipe 2, an outer fixing pipe 3, an outer corrugated structure 4, an outer supporting wall 5, a top wall 6, a connecting wall 7, a connecting channel 8, a switching wall 9, an inner corrugated pipe 10, an inner fixing pipe 11, an inner corrugated structure 12, an inner supporting wall 13, a connecting terminal 14, a fastening structure 15, a fastening pressing block 16, a crimping ring 17, a crimping groove 18, a stainless steel lining layer 19, a plastic protection layer 20, a first supporting wall 21 and a second supporting wall 22.
Example one
The PP/PPH/PPS/PE soft corrugated compensator comprises two connecting flanges or socket sleeves and a soft corrugated pipe welded and fixed between the two connecting flanges or socket sleeves;
the soft corrugated pipe comprises the following components in percentage by mass:
SEBS：65％、
linear low density polyethylene: 30 percent of,
Antioxidant: 1 percent of,
Color master batch: 4 percent.
Further, the linear low density polyethylene has a density of 0.925g/cm3。
Further, the antioxidant is one or a mixture of two of antioxidant 1010 and antioxidant 168.
Further, the antioxidant is antioxidant 1010 and antioxidant 168, and the weight ratio of antioxidant 1010 to antioxidant 168 is 3: 1 by mass portion ratio.
Further, the preparation method of the soft ripple compensator comprises the following steps:
(1) stirring the SEBS, the linear low-density polyethylene, the antioxidant and the color master batch by a high-speed centrifugal stirrer, and then extruding and granulating in a particle extruder to obtain a particle raw material;
(2) extruding the granulated particle raw materials through an extruder, and performing water cooling molding to obtain a soft corrugated plate;
(3) and welding and fixing the soft corrugated pipe on the connecting flange or the socket sleeve to obtain the soft corrugated compensator.
As shown in the figure, in the present embodiment, the PP/PPH/PPs/PE soft corrugated compensator includes two connecting flanges 1 and an S-shaped soft corrugated pipe 2 fixed between the two connecting flanges;
the flexible corrugated pipe comprises two outer fixed pipes 3, a plurality of outer corrugated structures 4 are arranged between the outer fixed pipes and protrude outwards, and the two outer fixed pipes are respectively welded and fixed on two connecting flanges;
the outer corrugated structure comprises two outer supporting walls 5 arranged in a mirror image mode and a top wall 6 connected to the tops of the two outer supporting walls;
the two outer supporting walls are obliquely arranged, so that the distance between the two outer supporting walls is gradually increased from outside to inside, and the section of the top wall is of an arc-shaped structure;
the two outer corrugated structures are connected through a connecting wall 7, and the cross section of the connecting wall is of an arc-shaped structure protruding inwards, so that the cross section of each outer corrugated structure is of an S-shaped structure;
in a free state, the included angle a between the two outer supporting walls is 38 degrees, the distance between the inner sides of the two outer supporting walls is L1, the distance between the two adjacent outer corrugated structures is L2, L1 is greater than L2, and L1-L2 is less than 8 mm.
Furthermore, the end face of the connecting flange is of a circular structure or a rectangular structure.
Furthermore, a connecting channel 8 is arranged in the middle of the connecting flange, a transfer wall 9 is vertically arranged on the inner ring of the connecting channel, and an inner corrugated pipe 10 is fixed between the two transfer walls;
the inner corrugated pipe comprises two inner fixed pipes 11, and a plurality of inner corrugated structures 12 are arranged between the two inner fixed pipes and protrude inwards;
the inner corrugated structure comprises two inner supporting walls 13 which are arranged in a mirror image manner, and the two inner supporting walls are obliquely arranged, so that the distance between the two inner supporting walls is gradually reduced from outside to inside;
in a free state, an included angle b between the two inner supporting walls is 124 degrees, the distance between the inner sides of the two inner supporting walls is L3, the distance between the two adjacent inner corrugated structures is L4, L3 is L4, and L3 is L2L 1;
the end of the inner fixing pipe is vertically provided with a plurality of connecting terminals 14 outwards, and the connecting terminals penetrate through the transfer wall and are locked and fixed through a fastening structure 15, so that the inner fixing pipe is pressed on the inner side wall of the outer fixing pipe.
Further, the height of the outer corrugated structure is h1, the height of the inner corrugated structure is h3, and h1 is h 3.
Further, the thickness of the outer support wall is h2, the thickness of the inner support wall is h4, and h2 is less than h 4.
Furthermore, the outer wall of the inner fixing pipe is provided with a plurality of fastening pressing blocks 16, and the fastening pressing blocks are of a circular truncated cone-shaped structure.
Furthermore, the fastening structure comprises a crimping ring 17, a crimping groove 18 with an inward opening is formed in the crimping ring, the crimping ring is sleeved outside the transfer wall, the connecting terminal is inserted into the crimping groove, and the fastening structure is locked and fixed through a bolt and a nut.
Further, the inner corrugation structure comprises a stainless steel lining layer 19 and a plastic protection layer 20 covering the stainless steel lining layer.
Example two
The difference between the PP/PPH/PPs/PE soft bellows compensator of the embodiment one is that the soft bellows comprises the following components by mass percent:
SEBS：63％、
linear low density polyethylene: 29 percent,
Antioxidant: 1 percent of,
Color master batch: 7 percent.
EXAMPLE III
The difference between the PP/PPH/PPs/PE soft bellows compensator of the embodiment one is that the soft bellows comprises the following components by mass percent:
SEBS：66％、
linear low density polyethylene: 31 percent of,
Antioxidant: 0.5 percent,
Color master batch: 2.5 percent.
Further, the outer corrugated structure comprises a first supporting wall 21 and a second supporting wall 22 which are arranged in a mirror image mode, the first supporting wall and the second supporting wall are arranged in an inclined mode, the section of the whole outer corrugated structure is of a V-shaped structure, and the distance between the first supporting wall and the second supporting wall gradually increases from outside to inside;
in a free state, an included angle c between the first supporting wall and the second supporting wall is 68 degrees, the distance between the inner sides of the first supporting wall and the second supporting wall is L5, the distance between two adjacent outer corrugated structures is L6, and L5 is L6.

Claims (4)

1. The soft corrugated compensator comprises two connecting flanges and a soft corrugated pipe welded and fixed between the two connecting flanges;
the corrugated pipe is characterized by comprising the following components in percentage by mass:
SEBS：63-67％、
linear low density polyethylene: 28-32 percent,
Antioxidant: 0.5 to 1.2 percent of,
Color master batch: the balance;
the flexible corrugated pipe comprises two outer fixed pipes, a plurality of outer corrugated structures are arranged between the outer fixed pipes and protrude outwards, and the two outer fixed pipes are respectively welded and fixed on the two connecting flanges;
the outer corrugated structure comprises two outer supporting walls arranged in a mirror image mode and a top wall connected to the tops of the two outer supporting walls;
the two outer supporting walls are obliquely arranged, so that the distance between the two outer supporting walls is gradually increased from outside to inside, and the section of the top wall is of an arc-shaped structure;
the two outer corrugated structures are connected through a connecting wall, and the cross section of the connecting wall is of an arc-shaped structure protruding inwards, so that the cross section of each outer corrugated structure is of an S-shaped structure;
in a free state, an included angle a between two outer supporting walls is 38 degrees, the distance between the inner sides of the two outer supporting walls is L1, the distance between two adjacent outer corrugated structures is L2, L1 is more than L2, and L1-L2 is less than 8 mm;
or the outer corrugated structure comprises a first supporting wall and a second supporting wall which are arranged in a mirror image mode, the first supporting wall and the second supporting wall are arranged in an inclined mode, the section of the whole outer corrugated structure is of a V-shaped structure, and the distance between the first supporting wall and the second supporting wall gradually increases from outside to inside;
in a free state, an included angle c between the first supporting wall and the second supporting wall is 68 degrees, the distance between the inner sides of the first supporting wall and the second supporting wall is L5, the distance between two adjacent outer corrugated structures is L6, and L5 is L6;
the end face of the connecting flange is of a circular structure or a rectangular structure;
a connecting channel is arranged in the middle of the connecting flange, a transfer wall is vertically arranged on the inner ring of the connecting channel, and an inner corrugated pipe is fixed between the two transfer walls;
the inner corrugated pipe comprises two inner fixed pipes, and a plurality of inner corrugated structures are arranged between the two inner fixed pipes and protrude inwards;
the inner corrugated structure comprises two inner supporting walls arranged in a mirror image manner, and the two inner supporting walls are obliquely arranged, so that the distance between the two inner supporting walls is gradually reduced from outside to inside;
in a free state, an included angle b between the two inner supporting walls is 124 degrees, the distance between the inner sides of the two inner supporting walls is L3, the distance between the two adjacent inner corrugated structures is L4, L3 is L4, and L3 is L2L 1;
the end part of the inner fixing pipe is vertically and outwards provided with a plurality of connecting terminals, and the connecting terminals penetrate through the transfer wall and are locked and fixed through the fastening structure, so that the inner fixing pipe is pressed on the inner side wall of the outer fixing pipe;
the height of the outer corrugated structure is h1, the height of the inner corrugated structure is h3, and h1 is h 3;
the thickness of the outer support wall is h2, the thickness of the inner support wall is h4, and h2 is less than h 4;
the outer wall of the inner fixed pipe is provided with a plurality of fastening pressing blocks which are of a round table structure;
the fastening structure comprises a compression joint ring, the compression joint ring is provided with a compression joint groove with an inward opening, the compression joint ring is sleeved outside the transfer wall, so that the connecting terminal is inserted into the compression joint groove and is locked and fixed through a bolt and a nut;
the inner ripple structure comprises a stainless steel lining layer and a plastic protection layer coated and arranged outside the stainless steel lining layer.
2. The soft bellows compensator of claim 1, wherein the linear low density polyethylene has a density of 0.92 to 0.93g/cm3。
3. The soft ripple compensator of claim 1, wherein the antioxidant is one or a mixture of two of antioxidant 1010 and antioxidant 168.
4. The soft bellows compensator of claim 3, wherein the antioxidant is antioxidant 1010 and antioxidant 168 is present in a ratio of 3: 1 by mass portion ratio.
CN201811357709.1A 2018-11-15 2018-11-15 PP/PPH/PPS/PE soft ripple compensator Active CN109630795B (en)

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CN114542842A (en) * 2022-01-17 2022-05-27 江苏同方机械制造有限公司 Double-isolation high-temperature-resistant metal corrugated expansion joint
CN114110289B (en) * 2022-01-26 2022-04-29 中国空气动力研究与发展中心设备设计与测试技术研究所 Large-compensation compact compensator

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CN2187250Y (en) * 1994-03-21 1995-01-11 汪文良 Pipe-line compensator
WO2002030649A1 (en) * 2000-10-09 2002-04-18 Zapf Creation Ag Method for the production of at least one body and a pourable mixture for use in such a method
CN102153800A (en) * 2011-02-22 2011-08-17 青岛致远帕克塑料有限公司 Composite mixture and preparation method thereof
CN104251361A (en) * 2013-06-25 2014-12-31 泰州市立山机械有限公司 Corrugated expansion joint
CN204201358U (en) * 2014-10-15 2015-03-11 青岛绿科汽车燃气开发有限公司 The effective corrugated expansion joint of a kind of vacuum insulation
CN205991245U (en) * 2016-08-30 2017-03-01 洛阳双瑞特种装备有限公司 A kind of variable-diameter corrugated pipe
CN108533870A (en) * 2018-06-16 2018-09-14 江苏新高波纹管有限公司 A kind of lower link bar axis lateral type compensator

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