CN108506606A - A kind of high-temperature-resistant high-pressure-resistant seal nipple - Google Patents
A kind of high-temperature-resistant high-pressure-resistant seal nipple Download PDFInfo
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- CN108506606A CN108506606A CN201810571569.1A CN201810571569A CN108506606A CN 108506606 A CN108506606 A CN 108506606A CN 201810571569 A CN201810571569 A CN 201810571569A CN 108506606 A CN108506606 A CN 108506606A
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- pressure
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- 210000002445 nipple Anatomy 0.000 title claims abstract 12
- 230000006835 compression Effects 0.000 claims abstract description 40
- 238000007906 compression Methods 0.000 claims abstract description 40
- 230000004888 barrier function Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 24
- 239000012530 fluid Substances 0.000 description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 description 7
- 239000011707 mineral Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0206—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe
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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
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
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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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Pressure Members (AREA)
Abstract
Description
技术领域technical field
本发明涉及密封接头技术领域，具体涉及一种用于耐高温耐高压的密封接头。The invention relates to the technical field of sealing joints, in particular to a sealing joint for high temperature and high pressure resistance.
背景技术Background technique
接头处的连接密封，航空航天、矿石机械、石油化工、电线电缆、汽车等行业领域都有涉及，目前主要是采用机械和焊接两种途径来实现连接处的密封。焊接的方式多采用电焊、氩弧焊等工艺实现，通过这种方式连接密封的结构虽然可靠有效，但是对操作工艺要求高，很容易因缺陷而造成泄漏；在机械连接方面，不同领域的设计人员给出了不同的连接密封方案，但在高、低温频变的环境，或高温环境中使用，这些方案几乎都没有密封效果。在电缆应用领域，特别是矿物绝缘电缆的安装使用过程中，行业内还没有给出一种能够在高温环境下，防止电缆绝缘层(氧化镁)吸潮的密封连接方案。The connection sealing of joints is involved in aerospace, ore machinery, petrochemical, wire and cable, automobile and other industries. At present, mechanical and welding are mainly used to realize the sealing of joints. Welding methods are mostly realized by electric welding, argon arc welding and other processes. Although the structure connected by this method is reliable and effective, it has high requirements on the operation process, and it is easy to cause leakage due to defects; in terms of mechanical connection, the design of different fields Personnel have given different connection sealing schemes, but these schemes have almost no sealing effect when used in environments with frequent changes in high and low temperatures, or in high-temperature environments. In the field of cable application, especially during the installation and use of mineral insulated cables, the industry has not provided a sealing connection solution that can prevent the cable insulation layer (magnesia) from absorbing moisture in a high temperature environment.
发明内容Contents of the invention
本发明提供一种在高温高压环境下使用的密封接头，这种接头使用锥度密封，结构简单。The invention provides a sealing joint used in a high temperature and high pressure environment. The joint uses taper sealing and has a simple structure.
为解决上述技术问题，本发明采用如下技术方案：In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:
一种耐高温耐高压密封接头，包括：A high temperature and high pressure resistant sealing joint, comprising:
一个接头本体；a connector body;
两个锁紧螺母，其同轴等径设置的接头本体的两端，以及two jam nuts coaxially and equally diametrically disposed at both ends of the fitting body, and
两个压缩锥，其密封连接在接头本体与锁紧螺母之间，该压缩锥与接头本体和锁紧螺母同轴设置。Two compression cones are sealingly connected between the joint body and the lock nut, and the compression cones are arranged coaxially with the joint body and the lock nut.
进一步地，所述压缩锥朝向接头本体的一端形成有第一倒角，压缩锥朝向锁紧螺母的另一端形成有第二倒角，所述接头本体朝向压缩锥的一端形成有与第一倒角配合的第一斜面，所述锁紧螺母朝向压缩锥的一端形成有与第二倒角配合的第二斜面，所述第一斜面的角度大于第一倒角的角度，所述第二斜面的角度大于第二倒角的角度。Further, a first chamfer is formed at one end of the compression cone facing the joint body, a second chamfer is formed at the other end of the compression cone facing the lock nut, and a second chamfer is formed at one end of the joint body facing the compression cone. A first bevel fitted with an angle, the end of the lock nut facing the compression cone is formed with a second bevel matched with the second chamfer, the angle of the first bevel is greater than the angle of the first bevel, and the second bevel is The angle of is greater than the angle of the second chamfer.
优选地，所述第一斜面的角度小于第二斜面的角度，所述第一倒角的角度小于第二倒角的角度。Preferably, the angle of the first bevel is smaller than the angle of the second bevel, and the angle of the first chamfer is smaller than the angle of the second chamfer.
进一步地，所述接头本体一端与锁紧螺母螺纹连接，另一端内置有浅牙螺纹。Further, one end of the joint body is threadedly connected to the lock nut, and the other end is built with a shallow thread.
进一步地，所述压缩锥的内径比接头本体和锁紧螺母的内径小0.1mm～0.5mm。Further, the inner diameter of the compression cone is 0.1 mm to 0.5 mm smaller than the inner diameters of the joint body and the lock nut.
由以上技术方案可知，本发明通过多道密封屏障的作用，在满足常温常压条件下使用的同时，达到密封接头能够在高温且较高压强下使用的要求。It can be seen from the above technical solutions that the present invention meets the requirement that the sealed joint can be used at high temperature and relatively high pressure while meeting the conditions of normal temperature and pressure through the function of multiple sealing barriers.
附图说明Description of drawings
图1为本发明密封接头的轴向剖视图，并示出了管路件的安装位置；Fig. 1 is an axial sectional view of the sealing joint of the present invention, and shows the installation position of the pipeline parts;
图2为本发明压缩锥的使用状态图。Fig. 2 is a diagram of the use state of the compression cone of the present invention.
具体实施方式Detailed ways
如图1所示，所述耐高温耐高压密封接头由同轴设置的一个接头本体1、两个锁紧螺母2和两个压缩锥3构成，其中接头本体和锁紧螺母的内径相同，与管路件的外径相适配，锁紧螺母设置在接头本体两端。As shown in Figure 1, the high temperature and high pressure resistant sealing joint is composed of a joint body 1, two lock nuts 2 and two compression cones 3 arranged coaxially, wherein the inner diameters of the joint body and the lock nut are the same, and The outer diameters of the pipe fittings are matched, and the locking nuts are arranged at both ends of the joint body.
所述压缩锥3的内径可以与接头本体1和锁紧螺母2的内径相同，也可以比接头本体和锁紧螺母的内径小0.1mm～0.5mm，该内径差是在设计阶段就设置好的，具体根据需要连接密封的管路件种类决定的，当管路件为不锈钢材质的流体管道时，压缩锥与流体管道之间的间隙控制在0.2mm～0.5mm的范围内，当管路件为矿物绝缘电缆时，压缩锥与绝缘电缆之间的间隙控制在0.1mm～0.25mm的范围内。具有内径差是为了使安装初始阶段，压缩锥与管路件之间具有间隙，这样可以增大适配管路件尺寸的范围，压缩锥初始阶段不接触管路件，有效保护密封连接处。The inner diameter of the compression cone 3 can be the same as the inner diameter of the joint body 1 and the lock nut 2, or can be 0.1 mm to 0.5 mm smaller than the inner diameters of the joint body and the lock nut. The inner diameter difference is set at the design stage , depending on the type of pipeline parts that need to be connected and sealed. When the pipeline parts are stainless steel fluid pipes, the gap between the compression cone and the fluid pipes should be controlled within the range of 0.2mm to 0.5mm. For mineral insulated cables, the gap between the compression cone and the insulated cable is controlled within the range of 0.1mm to 0.25mm. The difference in inner diameter is to make a gap between the compression cone and the pipe fitting at the initial stage of installation, which can increase the size range of the fitting pipe fitting, and the compression cone does not touch the pipe fitting at the initial stage, effectively protecting the sealing connection.
如图2所示，所述压缩锥3朝向接头本体1的一端形成有第一倒角31，压缩锥朝向锁紧螺母2的另一端形成有第二倒角32，所述接头本体1朝向压缩锥的一端形成有与第一倒角配合的第一斜面11，所述锁紧螺母2朝向压缩锥的一端形成有与第二倒角配合的第二斜面21，所述第一斜面的角度α大于第一倒角的角度β，所述第二斜面的角度δ大于第二倒角的角度γ。当锁紧螺母达到拧紧状态时，压缩锥被压缩，这样接头本体与压缩锥、锁紧螺母与压缩锥就能够形成两道密封屏障，对连接处起到密封作用。As shown in FIG. 2 , the compression cone 3 has a first chamfer 31 formed at one end facing the joint body 1 , and a second chamfer 32 is formed at the other end of the compression cone facing the lock nut 2 , and the joint body 1 faces the compression One end of the cone is formed with a first bevel 11 matched with the first chamfer, and one end of the lock nut 2 facing the compression cone is formed with a second bevel 21 matched with the second chamfer, and the angle of the first bevel α greater than the angle β of the first chamfer, and the angle δ of the second chamfer is greater than the angle γ of the second chamfer. When the lock nut reaches the tightened state, the compression cone is compressed, so that the joint body and the compression cone, and the lock nut and the compression cone can form two sealing barriers to seal the connection.
所述第一斜面的角度α小于第二斜面的角度δ，所述第一倒角的角度β小于第二倒角的角度γ。The angle α of the first slope is smaller than the angle δ of the second slope, and the angle β of the first chamfer is smaller than the angle γ of the second chamfer.
本实施例中，所述第一斜面的角度α为7°～12°，所述第二斜面的角度δ为32°～40°，所述第一倒角的角度β为5°～10°，所述第二倒角的角度γ为24°～30°。In this embodiment, the angle α of the first slope is 7°-12°, the angle δ of the second slope is 32°-40°, and the angle β of the first chamfer is 5°-10° , the angle γ of the second chamfer is 24°-30°.
本实施例中，第一斜面的角度α典型但非限制性包括有：7％、8％、9％、10％、11％或12％；第二斜面的角度δ典型但非限制性包括有：32％、33％、34％、35％、36％、37％、38％、39％或40％；第一倒角的角度β典型但非限制性包括有：5％、6％、7％、8％、9％或10％；第二倒角的角度γ典型但非限制性包括有：24％、25％、26％、27％、28％、29％或30％。In this embodiment, the angle α of the first slope typically but not limited includes: 7%, 8%, 9%, 10%, 11% or 12%; the angle δ of the second slope typically but not limited includes : 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39% or 40%; the angle β of the first chamfer is typically but not limited to include: 5%, 6%, 7% %, 8%, 9% or 10%; the angle γ of the second chamfer typically but not limited includes: 24%, 25%, 26%, 27%, 28%, 29% or 30%.
为了进一步增强密封效果，所述接头本体1一端与锁紧螺母2螺纹连接，另一端内置有浅牙螺纹12，该螺纹为非标浅牙螺纹，在连接时，先将其拧在管路件上，这种螺纹牙咬合在管路件表面，能够形成另一道密封屏障。在连接像矿物绝缘电缆这样的管路件时，接头本体的另一端可以不设置螺纹。In order to further enhance the sealing effect, one end of the joint body 1 is threadedly connected with the lock nut 2, and the other end has a built-in shallow thread 12, which is a non-standard shallow thread. When connecting, first screw it on the pipe fitting On the surface, this thread bites on the surface of the pipe fitting and can form another sealing barrier. When connecting pipeline components such as mineral insulated cables, the other end of the connector body may not be provided with threads.
为了能够满足密封接头能够在不同的温度范围内使用，尤其是高温下使用，需选择与管路件膨胀系数相近且耐高温性能优异的材料，来加工各零部件，通常我们选择某一牌号的不锈钢作为各零部件的材料。In order to meet the requirement that the sealing joints can be used in different temperature ranges, especially at high temperatures, it is necessary to select materials with a similar expansion coefficient to the piping parts and excellent high temperature resistance to process each part. Usually we choose a certain brand Stainless steel is used as the material of each component.
由于这种密封接头能够在耐高温耐高压下起到密封作用，关键点在于压缩锥与接头本体的角度配合、压缩锥与锁紧螺母的角度配合，以及压缩锥与密封管件之间的间隙选择。下面结合具体实施例对本发明作进一步描述，但本发明的保护范围不仅局限于实施例。下表列出了每个具体的实施例实际参数及应用对象情况。Because this kind of sealing joint can play a sealing role under high temperature and high pressure resistance, the key points are the angle fit between the compression cone and the joint body, the angle fit between the compression cone and the lock nut, and the selection of the gap between the compression cone and the sealing pipe . The present invention will be further described below in conjunction with specific examples, but the protection scope of the present invention is not limited to the examples. The following table has listed the actual parameters and application object situation of each specific embodiment.
实施例1Example 1
先分别将干净的锁紧螺母2、压缩锥3装在需要连接的两个流体管道4的相对一端，流体管道4的规格为Φ25.4*2.1mm，材质也是316L不锈钢。根据流体管道4的外径大小，确定压缩锥3与流体管道4之间的间隙需控制在0.2mm～0.5mm之间。Install the clean lock nut 2 and compression cone 3 on the opposite ends of the two fluid pipes 4 to be connected. The size of the fluid pipe 4 is Φ25.4*2.1mm, and the material is also 316L stainless steel. According to the outer diameter of the fluid pipeline 4, it is determined that the gap between the compression cone 3 and the fluid pipeline 4 needs to be controlled within 0.2mm-0.5mm.
用扳手将接头本体1同时拧在两个流体管道4的一端，这里接头本体4内的非标浅牙螺纹能够容易拧紧流体管道4上，形成第一道密封屏障11。Use a wrench to screw the joint body 1 on one end of the two fluid pipelines 4 at the same time. Here, the non-standard shallow thread in the joint body 4 can be easily tightened on the fluid pipeline 4 to form the first sealing barrier 11 .
分别将压缩锥2和锁紧螺母2推向接头本体1，并用扳手将锁紧螺母2拧紧，直至压缩锥3被完全压缩为止。这时在接头处有形成了另外两道密封屏障13与23。Push the compression cone 2 and lock nut 2 to the joint body 1 respectively, and tighten the lock nut 2 with a wrench until the compression cone 3 is completely compressed. At this time, two other sealing barriers 13 and 23 are formed at the joint.
接头连接完成后，在管道内部注入高压液体，并时刻检测管道内部的压力变化，经过一段时间的测试管道内的压力并无明显变化，说明密封接头无泄漏。且当管道内的液体升至200℃时，亦无泄漏情况出现。After the joint connection is completed, inject high-pressure liquid into the pipeline and check the pressure change inside the pipeline at all times. After a period of testing, the pressure in the pipeline does not change significantly, indicating that the sealed joint has no leakage. And when the liquid in the pipeline rises to 200°C, there is no leakage.
实施例2Example 2
先分别将干净的锁紧螺母2、压缩锥3装在需要连接的两矿物绝缘电缆一端。这里的矿物绝缘电缆是一种铜芯铜护套、氧化镁粉作为绝缘层的防火电缆，外径选择为20.4mm。根据物绝缘电缆的外径大小，确定压缩锥3与矿物绝缘电缆之间的间隙需控制0.10mm～0.25mm之间。Install the clean lock nut 2 and the compression cone 3 respectively at one end of the two mineral insulated cables to be connected. The mineral insulated cable here is a fireproof cable with copper core and copper sheath and magnesium oxide powder as the insulation layer, and the outer diameter is selected as 20.4mm. According to the outer diameter of the physical insulated cable, it is determined that the gap between the compression cone 3 and the mineral insulated cable needs to be controlled between 0.10 mm and 0.25 mm.
将接头本体1装在其中一个矿物绝缘电缆一端，然后用压接工具将电缆线芯连接到一起，对连接处做好绝缘。由于考虑到实际安装困难，这里的接头本体1内部没有螺纹，因此只需将其套在连接位置中间即可。Install the connector body 1 on one end of one of the mineral insulated cables, and then use a crimping tool to connect the cable cores together and insulate the connection. Due to the difficulty of actual installation, the joint body 1 has no thread inside, so it only needs to be inserted in the middle of the connection position.
分别将压缩锥2和锁紧螺母2推向接头本体1，并用扳手将锁紧螺母2拧紧，直至压缩锥3被完全压缩为止。这时在接头处有形成了两道密封屏障13与23。Push the compression cone 2 and lock nut 2 to the joint body 1 respectively, and tighten the lock nut 2 with a wrench until the compression cone 3 is completely compressed. At this time, two sealing barriers 13 and 23 are formed at the joint.
连接完成后测量其绝缘电阻，然后将电缆放在放在电阻炉中，连接好电路，将电缆持续加热到1000℃度，并保温10min，观察灯泡变化。After the connection is completed, measure its insulation resistance, then place the cable in a resistance furnace, connect the circuit, heat the cable continuously to 1000°C, keep it warm for 10 minutes, and observe the change of the bulb.
加热完成后快速拿出电缆，并用冷水喷淋5min，测量其绝缘电阻并重新连接电路，观察灯泡变化。通过试验发现，灯泡一直在亮，说明接头处绝缘良好。After the heating is completed, take out the cable quickly, and spray it with cold water for 5 minutes, measure its insulation resistance and reconnect the circuit, and observe the change of the bulb. Through the test, it is found that the bulb is always on, indicating that the insulation at the joint is good.
以上所述实施方式仅仅是对本发明的优选实施方式进行描述，并非对本发明的范围进行限定，在不脱离本发明设计精神的前提下，本领域普通技术人员对本发明的技术方案作出的各种变形和改进，均应落入本发明的权利要求书确定的保护范围内。The above-mentioned embodiments are only descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, those skilled in the art may make various modifications to the technical solutions of the present invention. and improvements, all should fall within the scope of protection determined by the claims of the present invention.
Claims (9)
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| CN111906532A (en) * | 2020-06-22 | 2020-11-10 | 黑龙江建筑职业技术学院 | Assembled heating radiator for heat supply engineering and assembling method thereof |
| CN115201983A (en) * | 2022-08-16 | 2022-10-18 | 浙江大学 | Submarine optical cable splitter capable of being replaced and expanded quickly and used for submarine monitoring |
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