WO2021098203A1 - 大口径钢塑组合螺纹保护器 - Google Patents

大口径钢塑组合螺纹保护器 Download PDF

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Publication number
WO2021098203A1
WO2021098203A1 PCT/CN2020/096607 CN2020096607W WO2021098203A1 WO 2021098203 A1 WO2021098203 A1 WO 2021098203A1 CN 2020096607 W CN2020096607 W CN 2020096607W WO 2021098203 A1 WO2021098203 A1 WO 2021098203A1
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Prior art keywords
plastic core
iron shell
plastic
loosening
thread
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PCT/CN2020/096607
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English (en)
French (fr)
Inventor
乔士军
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无锡市红叶塑钢制品有限公司
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Publication of WO2021098203A1 publication Critical patent/WO2021098203A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D59/00—Plugs, sleeves, caps, or like rigid or semi-rigid elements for protecting parts of articles or for bundling articles, e.g. protectors for screw-threads, end caps for tubes or for bundling rod-shaped articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D59/00—Plugs, sleeves, caps, or like rigid or semi-rigid elements for protecting parts of articles or for bundling articles, e.g. protectors for screw-threads, end caps for tubes or for bundling rod-shaped articles
    • B65D59/02—Plugs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D59/00—Plugs, sleeves, caps, or like rigid or semi-rigid elements for protecting parts of articles or for bundling articles, e.g. protectors for screw-threads, end caps for tubes or for bundling rod-shaped articles
    • B65D59/06—Caps
    • 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
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear

Definitions

  • the utility model relates to a cap used to protect steel pipe threads and pipe heads, in particular to a thread protector suitable for steel pipes for oil and natural gas with a large diameter of 20 inches or more (including 20 inches).
  • the thread protector is mainly used to prevent oil and natural gas pipe threads and pipe heads from being damaged during normal loading and unloading and transportation, preventing steel pipe threads from penetrating dust and water during transportation and normal storage, and helping to prevent the intrusion of wet gas Or the corrosion caused by retention is minimized.
  • the known thread protector is a fully plastic structure, and mainly has the following defects: 1) The temperature changes plastic thermal deformation, the product size of the protector and the precision of the steel pipe thread cannot be controlled; the thread protector is easy to fall off at high temperature, and the thread protects at low temperature 2) The impact strength of the all-plastic thread protector cannot meet the requirements of API Spec 5CT/ISO 11960; 3) The large-diameter thread protector is difficult to manufacture, and the product is thick and heavy, and it is inconvenient to install and disassemble.
  • the purpose of the utility model is to provide a thread protector with a large diameter above 20 inches (including 20 inches) to prevent the protector from falling off the pipeline.
  • the utility model adopts the following technical solutions:
  • a large-caliber steel-plastic combined thread protector used to protect the tube head 7 of a steel pipe includes an iron shell 1, a bayonet 2, a plastic core 3 with a thread 4, and an anti-loosening accessory 6.
  • the plastic with a thread 4 The core 3 is threaded with the tube head 7; the iron shell 1 and the plastic core 3 are interference fit;
  • a plastic core 3 is arranged inside the iron shell 1, and the iron shell 1 and the plastic core 3 are connected and fixed by a bayonet 2, and the thread 4 is arranged inside the plastic core 3;
  • the iron shell 1 is arranged on the inner side of the plastic core 3, and the iron shell 1 and the plastic core 3 are connected and fixed by the bayonet 2, and the thread 4 is arranged on the outer side of the plastic core 3;
  • the iron shell 1 or the plastic core 3 has an anti-loosening fitting hole 8, and the anti-loosing accessory 6 is installed between the anti-loosing fitting hole 8 and the pipe head 7 on the iron shell 1.
  • the pipe head 7 corresponding to the anti-loosening fitting hole 8 has a recessed space 13, and the anti-loosing body 9 of the anti-loosening accessory 6 is placed In the recessed space, the pin 11 of the anti-loosening accessory 6 can be inserted into the anti-loosing fitting hole 8 and the hole 10 of the anti-loosing body 9; or when the iron shell 1 is arranged inside the plastic core 3, the anti-loosing accessory 6 is The cotter pin is inserted into the corresponding hole of the anti-loosening fitting hole 8 and the pipe head 7.
  • the iron shell 1 is also provided with a wrench hole 5 for assisting in installation and disassembly.
  • the anti-loosening body 9 is provided with an arc 12 matching the tube head 7.
  • the top of the iron shell 1 is stamped into a circular arc shape.
  • a bayonet 2 is formed by stamping on the iron shell 1.
  • the bayonet 2 is cut into the plastic core 3 to form a barb effect, so that the iron shell 1 and the plastic core 3 are integrated.
  • the plastic core 3 is manufactured by compression molding process.
  • the anti-loosening accessory is a bolt design, which is convenient to install and easy to disassemble.
  • the thread 4 is formed by machining on a machine tool.
  • the iron shell 1 and the plastic core 3 of the utility model are connected by a bayonet 2 so that the iron shell 1 and the plastic core 3 are not separated after being impacted.
  • the hard iron shell 1 has good impact resistance, and the plastic core has good cushioning and shock absorption, which effectively protects all parts of the tube head inside.
  • the anti-loosening accessory of the large-caliber thread protector is in the form of a bolt, which is convenient to install and disassemble.
  • the iron shell 1 is also provided with a wrench hole 5 for assisting in installation and disassembly. This technical solution makes the utility model easy to install and disassemble.
  • the utility model can effectively prevent the pipe threads and pipe ends for oil and natural gas from being damaged during normal loading and unloading and transportation, prevent the threads from infiltrating dust and water during transportation and normal storage, and help to prevent the intrusion or retention of moist gas
  • the corrosion caused is minimized, and the protector is equipped with a wrench hole and a pin attachment, which is convenient to install and disassemble, and it is not easy to fall off. And can be easily processed and manufactured, cost-effectively produced and versatile.
  • Figure 1 is a schematic diagram of the structure of the first embodiment
  • FIG. 2 is a schematic view of the front view and the top view of the anti-loosening body 9;
  • Figure 3 is a schematic diagram of a pin 9
  • FIG. 4 is a schematic diagram of the concave space 13 in the lower left foot of FIG. 1;
  • Figure 5 is a schematic structural diagram of the second embodiment
  • Fig. 6 is a plan view of Fig. 5.
  • the oil and natural gas special pipes are steel pipes, which are connected by threads. One end of the steel pipe is an external thread and the other end is an internal thread. Both internal and external threads need to be protected.
  • Example 1 is a protection method for the external thread of a steel pipe
  • Example 2 is a protection method for the internal thread of a steel pipe.
  • this specific embodiment adopts the following technical solutions: it includes iron shell 1, bayonet 2, plastic core 3, thread 4, wrench hole 5 and anti-loosening accessory 6, iron shell 1 A plastic core 3 is arranged inside, and the iron shell 1 and the plastic core 3 are connected and fixed by a bayonet 2, and the thread 4 is arranged inside the plastic core 3.
  • the plastic core 3 with the internal thread 4 is threadedly matched with the external thread of the pipe head 7.
  • the iron shell 1 and the plastic core 3 are bayonet connected to prevent the iron shell 1 and the plastic core 3 from being separated.
  • the hard iron shell 1 has good impact resistance
  • the plastic core has good cushioning and shock absorption, which effectively protects all parts of the tube head inside.
  • the iron shell 1 is stamped to form a bayonet 2 which cuts into the plastic core 3 to form a barb effect, so that the iron shell 1 and the plastic core 3 become one body .
  • the plastic core 3 has an anti-loosening fitting hole 8, and the anti-loosing accessory 6 is installed between the anti-loosing fitting hole 8 and the pipe head 7 on the iron shell 1.
  • the anti-loosening accessory 6 is installed after the protector is installed and screwed on the pipe head 7.
  • the pipe head 7 has a recessed space 13
  • the anti-loosing accessory 6 The anti-loosening body 9 is placed in the recessed space, and the fastening object 11 of the anti-loosing accessory 6 (using a pin design or with a fastening screw) can be inserted into the anti-loosing matching hole 8 and the socket 10 of the anti-loosing body 9, and on the protector
  • the wrench hole 5 design is convenient for loading and unloading the protector.
  • This embodiment can effectively prevent oil and natural gas pipe threads and pipe ends from being damaged during normal loading and unloading and transportation, prevent steel pipe threads from infiltrating dust and water during transportation and normal storage, and help to prevent the intrusion of moist gas Or the corrosion caused by detention is minimized, and the wrench hole structure design is convenient for installation and disassembly. And it can be produced and used in a cost-effective manner.
  • the iron shell 1 has an anti-loosening fitting hole 8, and the anti-loosing accessory 6 is installed between the anti-loosing fitting hole 8 and the pipe head 7 on the iron casing 1.
  • the anti-loosening accessory 6 is a cotter pin of the fastening object 11, and the cotter pin of the fastening object 11 is inserted into the anti-loosing fitting hole 8 and the corresponding hole of the pipe head 7.
  • the anti-loosening accessory 6 is installed after the protector is installed and screwed on the pipe head.
  • the anti-loosing accessory is a fastening object 11 (using a pin or a fastening screw or a split pin), which can specifically be a split pin, It is flexible and easy to install and disassemble.
  • the protector has 8 holes in four places for installing the anti-loosening accessory 6, which can be installed at any two places, which can effectively prevent the protector from falling off during transportation and avoid pipe threads and pipes. The end is damaged or polluted or corroded.
  • Other components and connection relationships are the same as those in the first embodiment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Abstract

一种大口径钢塑组合螺纹保护器，用于保护钢管的管头（7），它包括铁壳（1）、卡口（2）、带螺纹（4）的塑芯（3）及防松附件（6），带螺纹（4）的塑芯（3）与管头（7）螺纹配合；铁壳（1）和塑芯（3）过盈配合；铁壳（1）的内部设置塑芯（3），且铁壳（1）与塑芯（3）通过卡口（2）连接固定，螺纹（4）设置在塑芯（3）内侧；或者铁壳（1）设置在塑芯（3）的内侧，且铁壳（1）与塑芯（3）通过卡口（2）连接固定，螺纹（4）设置在塑芯（3）的外侧；铁壳（1）或塑芯（3）上有防松配合孔（8），防松附件（6）安装在防松配合孔（8）与管头（7）之间。

Description

大口径钢塑组合螺纹保护器 技术领域
本实用新型涉及一种用于保护钢管螺纹和管头的帽子，具体涉及一种适用于20英寸以上(包括20英寸)大口径的石油、天然气用钢管的螺纹保护器。
背景技术
螺纹保护器主要用于防止石油、天然气用管螺纹和管头在正常的装卸和运输途中受损，防止钢管螺纹在运输过程中和正常贮存期间渗入灰尘和水，有助于使由潮湿气体侵入或滞留造成的腐蚀降至最低。
已知的螺纹保护器为全塑结构，主要存在以下几个缺陷：1)气温变化塑料热变形，保护器产品尺寸和钢管螺纹配合精度无法控制；高温时螺纹保护器易脱落，低温时螺纹保护器难以拆卸；2)全塑螺纹保护器抗冲击强度无法满足API Spec 5CT/ISO 11960的要求；3)大口径螺纹保护器尺寸大制造困难，产品厚重，安装、拆卸不方便。
实用新型内容
本实用新型的目的是提供一种20英寸以上(包括20英寸)大口径螺纹保护器，防止保护器从管道上脱落。本实用新型是采用以下技术方案：
一种大口径钢塑组合螺纹保护器，用于保护钢管的管头7，它包括铁壳1、卡口2、带螺纹4的塑芯3及防松附件6，所述带螺纹4的塑芯3与管头7螺纹配合；铁壳1和塑芯3过盈配合；
铁壳1的内部设置塑芯3，且铁壳1与塑芯3通过卡口2连接固 定，螺纹4设置在塑芯3内侧；
或者铁壳1设置在塑芯3的内侧，且铁壳1与塑芯3通过卡口2连接固定，螺纹4设置在塑芯3的外侧；
所述铁壳1或塑芯3上有防松配合孔8，所述防松附件6安装在铁壳1上防松配合孔8与管头7之间。
当铁壳1的内部设置有塑芯3时，所述在防松配合孔8对应的管头7对应处，管头7有下凹空间13，所述防松附件6的防松本体9置于下凹空间，防松附件6的销类物件11可插入防松配合孔8和防松本体9的插孔10中；或铁壳1设置在塑芯3的内侧时，防松附件6为开口销，开口销插入防松配合孔8和管头7对应的孔中。
所述铁壳1上还设有用于帮助安装、拆卸的扳手孔5。
所述防松本体9设置有与管头7相吻合的弧形12。
铁壳1顶部冲压成圆弧形。
铁壳1压入塑芯3后，通过在铁壳1上冲压形成卡口2，该卡口2切入塑芯3，形成倒刺作用，使铁壳1与塑芯3两者成为一体。
塑芯3采用压塑工艺模压制造。
防松附件为插销设计，安装方便，容易拆卸。
螺纹4是在机床上机加工形成的。
本实用新型铁壳1和塑芯3采用卡口2连接，使铁壳1和塑芯3在受到冲击后不分离。坚硬的铁壳1具有良好的抗冲击能力，塑芯具有良好的缓冲吸收冲击力，有效保护里面的管头各部分。大口径螺纹保护器防松附件采用插销的形式，安装、拆卸比较方便。
铁壳1上还设有用于帮助安装、拆卸的扳手孔5。该技术方案使得本实用新型安装、拆卸方便。
本实用新型能有效防止石油、天然气用管螺纹和管端在正常的装卸和运输途中受损，防止螺纹在运输过程中和正常贮存期间渗入灰尘和水，有助于使由潮湿气体侵入或滞留造成的腐蚀降至最低，保护器设有扳手孔及插销附件，安装、拆卸方便，不易脱落。且能简便加工制造在成本上有利地生产和通用。
附图说明：
图1是实施例一的结构示意图；
图2是防松本体9的主视图和俯视图示意；
图3是销类物件9示意图；
图4是图1左下脚下凹空间13的示意图；
图5是实施例二的结构示意图；
图6是图5的俯视图。
附图标记说明：铁壳1、卡口2、塑芯3、螺纹4、扳手孔5及防松附件6、管头7、防松配合孔8、防松本体9、插孔10、紧固物件11、弧形12、下凹空间13。
具体实施方式
石油、天然气专用管是钢管，采用螺纹连接，钢管一端为外螺纹，另一端为内螺纹，都需要对内外螺纹进行保护。实施例1是对钢管外螺纹的保护方式，实施例2是对钢管内螺纹的保护方式。
具体实施例一：参看图1～4，本具体实施方式采用以下技术方案：它包括铁壳1、卡口2、塑芯3、螺纹4、扳手孔5及防松附件6，铁壳1的内部设置有塑芯3，且铁壳1与塑芯3通过卡口2连接固定，螺纹4设置在塑芯3内侧。带内螺纹4的塑芯3与管头7的外螺纹进行螺纹配合。
本具体实施方式铁壳1和塑芯3卡口连接，防止铁壳1和塑芯3分离。坚硬的铁壳1具有良好的抗冲击能力，塑芯具有良好的缓冲吸收冲击力，有效保护里面的管头各部分。
塑芯3被铁壳1压入后，由于在铁壳1上有冲压形成卡口2，该卡口2切入塑芯3，形成倒刺作用，使铁壳1与塑芯3两者成为一体。
塑芯3上有防松配合孔8，防松附件6安装在铁壳1上防松配合孔8与管头7之间。
本具体实施方式防松附件6在保护器安装旋紧在管头7上后安装，在防松配合孔8对应的管头7对应处，管头7有下凹空间13，防松附件6的防松本体9置于下凹空间，防松附件6的紧固物件11(采用插销设计或者配紧固螺钉)可插入防松配合孔8和防松本体9的插孔10中，保护器上预留有安装防松附件6的孔位四处，任意安装一处即可，有效的防止管子在运输过程中保护器脱落，避免管子螺纹和管端受损或是污染、腐蚀。扳手孔5设计，便于保护器装卸。
本具体实施方式能有效防止石油、天然气用管螺纹和管端在正常的装卸和运输途中受损，防止钢管螺纹在运输过程中和正常贮存期间渗入灰尘和水，有助于使由潮湿气体侵入或滞留造成的腐蚀降至最低，扳手孔结构设计，安装、拆卸方便。并能在成本上有利地生产和通用。
具体实施例二：参看图5和6，本具体实施方式与具体实施方式一的不同之处在于所述的铁壳1设置在塑料3的内侧，且铁壳1与塑料3通过卡口连接，螺纹4设置在塑料3的外侧。
铁壳1上有防松配合孔8，防松附件6安装在铁壳1上防松配合孔8与管头7之间。具体的，防松附件6为紧固物件11开口销，紧 固物件11开口销插入防松配合孔8和管头7对应的孔中。
本具体实施方式防松附件6在保护器安装旋紧在管头上后安装，防松附件是一个紧固物件11(采用插销或者配紧固螺钉或开口插销)，具体可以是一个开口销，，有弹性，便于安装拆卸，保护器上预留有安装防松附件6的孔位四处8孔，任意安装两处即可，有效的防止管子在运输过程中保护器脱落，避免管子螺纹和管端受损或是污染、腐蚀。其他组成与连接关系与具体实施方式一相同。

Claims (7)

  1. 一种大口径钢塑组合螺纹保护器，用于保护钢管的管头(7)，其特征在于它包括铁壳(1)、卡口(2)、带螺纹(4)的塑芯(3)及防松附件(6)，所述带螺纹(4)的塑芯(3)与管头(7)螺纹配合；铁壳(1)和塑芯(3)过盈配合；
    铁壳(1)的内部设置塑芯(3)，且铁壳(1)与塑芯(3)通过卡口(2)连接固定，螺纹(4)设置在塑芯(3)内侧；
    或者铁壳(1)设置在塑芯(3)的内侧，且铁壳(1)与塑芯(3)通过卡口(2)连接固定，螺纹(4)设置在塑芯(3)的外侧；
    所述铁壳(1)或塑芯(3)上有防松配合孔(8)，所述防松附件(6)安装在防松配合孔(8)与管头(7)之间。
  2. 根据权利要求1所述的大口径钢塑组合螺纹保护器，其特征在于:当铁壳(1)的内部设置有塑芯(3)时，所述在防松配合孔(8)对应的管头(7)处，管头(7)有下凹空间(13)，所述防松附件(6)的防松本体(9)置于下凹空间，防松附件(6)的紧固物件(11)可插入防松配合孔(8)和防松本体(9)的插孔(10)中；或铁壳(1)设置在塑芯(3)的内侧时，防松附件(6)为紧固物件(11)，紧固物件(11)插入防松配合孔(8)和管头(7)对应的孔中。
  3. 根据权利要求2所述的大口径钢塑组合螺纹保护器，其特征在于:的所述铁壳(1)上还设有用于帮助安装、拆卸的扳手孔(5)。
  4. 根据权利要求3所述的大口径钢塑组合螺纹保护器，其特征在于:所述防松本体(9)设置有与管头(7)相吻合的弧形(12)。
  5. 根据权利要求4所述的大口径钢塑组合螺纹保护器，其特征在于:铁壳(1)顶部冲压成圆弧形。
  6. 根据权利要求5所述的大口径钢塑组合螺纹保护器，其特征在于:铁壳(1)压入塑芯(3)后，通过在铁壳(1)上冲压形成卡口(2)，该卡口(2)切入塑芯(3)，形成倒刺作用，使铁壳(1)与塑芯(3)两者成为一体。
  7. 根据权利要求6所述的大口径钢塑组合螺纹保护器，其特征在于:塑芯(3)采用压塑工艺模压制造。
PCT/CN2020/096607 2019-11-19 2020-06-17 大口径钢塑组合螺纹保护器 WO2021098203A1 (zh)

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US1774569A (en) * 1928-01-20 1930-09-02 Pittsburgh Screw And Bolt Corp Thread protector
US2022189A (en) * 1935-03-29 1935-11-26 Engstrom Birger Pipe thread protector
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