WO2015184755A1 - 电加热管管头多功能防护连接器及电加热管管头密封方法 - Google Patents

电加热管管头多功能防护连接器及电加热管管头密封方法 Download PDF

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Publication number
WO2015184755A1
WO2015184755A1 PCT/CN2014/093091 CN2014093091W WO2015184755A1 WO 2015184755 A1 WO2015184755 A1 WO 2015184755A1 CN 2014093091 W CN2014093091 W CN 2014093091W WO 2015184755 A1 WO2015184755 A1 WO 2015184755A1
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Prior art keywords
electric heating
tube
heating tube
center conductor
metal outer
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PCT/CN2014/093091
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English (en)
French (fr)
Inventor
谭克
Original Assignee
镇江东方电热有限公司(中外合资)
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Priority claimed from CN201410249985.1A external-priority patent/CN104066214B/zh
Priority claimed from CN201420301421.3U external-priority patent/CN203912225U/zh
Application filed by 镇江东方电热有限公司(中外合资) filed Critical 镇江东方电热有限公司(中外合资)
Publication of WO2015184755A1 publication Critical patent/WO2015184755A1/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
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes

Definitions

  • the invention belongs to the technical field of electric heating elements, in particular to a multi-function protective connector for an electric heating tube head and a sealing method for an electric heating tube head.
  • an end portion of an electric heating tube (also referred to as an electric heating tube tube head, see FIG. 1) is usually connected to a power terminal in the junction box through a lead end conductor 33, and is electrically heated.
  • the tubular outer casing 31 of the tube is typically sealingly coupled to the container to ensure that the heated medium within the container does not leak.
  • part of the electric heating tube casing located in the container sometimes breaks due to overheating, causing the heated medium to enter the electric heating tube casing, and then passing through the electrically conductive insulating medium (such as oxidation) in the inner core 32 of the electric heating tube.
  • the electrically conductive insulating medium such as oxidation
  • Magnesium powder oozes from the end of the electric heating tube, causing the heated medium to leak.
  • the existing electric heating tube also has the problem that external moisture easily enters the electric heating tube inner core 32, thereby affecting the insulating property of the thermally conductive insulating medium.
  • the overcurrent protection system of the existing electric heating tubes monitors the overall current of all electric heating tubes, so when a single electric When the heating pipe is overcurrent, the overcurrent protection system is difficult to find and protect in time, thereby causing overcurrent damage of the electric heating pipe.
  • the first object of the present invention is to provide a multi-function protection of an electric heating pipe head which can effectively prevent the heat medium from being leaked from the heat conductive insulating medium of the electric heating tube inner core and ensure the thermal insulation property of the electric heating tube inner core. Connector.
  • a second object of the present invention is to provide an electric heating pipe head sealing method which can effectively prevent leakage of a heat-conductive insulating medium of a heating medium from an inner core of an electric heating pipe and ensure insulation performance of a heat-conductive insulating medium of an inner core of the electric heating pipe.
  • a technical solution for achieving the first object of the present invention is: an electric heating pipe head multifunctional protection connector comprising a pipe joint and a sealing pipe assembly; the sealing pipe assembly comprising a section of a metal outer pipe and a center located at a center of the metal outer pipe a conductor having a structure at one end that can be mated with the lead-out conductor of the electric heating tube, the other end of the center conductor having an extraction rod that can be connected to an external power source; and a sealing sleeve made of a Teflon material between the center conductor and the metal outer tube Sealing the filling; the pipe joint is capable of sealingly connecting the metal outer tube to the tubular outer casing of the electric heating tube.
  • the center conductor is composed of a front conductive rod located at the front stage, a rear conductive rod located at the rear stage, and a fuse connected between the front conductive rod and the rear conductive rod.
  • the front conductive bar can be connected to the lead-out conductor of the electric heating tube, and the rear end of the rear conductive rod is the lead-out rod.
  • the outer periphery of the fuse is sleeved with an inner sleeve of a polytetrafluoroethylene material, and the inner sleeve is located inside the sealing sleeve.
  • the pipe joint is a known tube joint.
  • a technical solution for achieving the second object of the present invention is: a method for sealing a tube of an electric heating tube, comprising the steps of: 1 placing a sleeve of a piece of polytetrafluoroethylene material on a fuse, both ends of the fuse and the front conductive rod The post-conductor bar is crimped to form a center conductor. The center conductor is inserted into a sealing sleeve of a piece of polytetrafluoroethylene material, and the sealing sleeve is matched with the front and rear conductive rods. 2 Insert the sealing sleeve inserted into the center conductor into a metal outer tube, and the sealing sleeve is matched with the metal outer tube.
  • the metal outer tube inserted into the sealing sleeve is subjected to a diameter reduction treatment on the reducing device, and the sealing sleeve is squeezed to seal the sealing sleeve between the front and rear conductive rods and the metal outer tube.
  • 3 inserting the reduced diameter outer metal tube and the tubular outer end of the electric heating tube from both ends of the tube joint, and simultaneously connecting the lead end conductor of the electric heating tube and the front conductive rod, and then passing the metal through the tube joint
  • the outer tube is sealingly connected to the tubular outer casing of the electric heating tube.
  • FIG. 1 is a schematic structural view of a prior art electric heating pipe head.
  • FIG. 2 is a longitudinal cross-sectional view showing a multi-function protective connector for an electric heating tube head according to Embodiment 1 of the present invention.
  • FIG. 3 is a longitudinal cross-sectional view showing a multi-function protective connector for an electric heating tube head according to Embodiment 2 of the present invention.
  • the electric heating pipe head multifunctional protection connector of the present embodiment includes a pipe joint 1 and a sealed pipe assembly 2.
  • the sealed tube assembly 2 includes a length of metal outer tube 21 and a center conductor 22 at the center of the metal outer tube 21, and the central conductor 22 and the metal outer tube 21 are hermetically sealed by a sealing sleeve 24 of polytetrafluoroethylene material.
  • One end of the center conductor 22 has a structure that can be mated with the lead-out conductor 33 of the electric heating tube 3, and the other end of the center conductor 22 has an extraction rod 23 that can be connected to an external power source.
  • the pipe joint 1 (using a known ferrule pipe joint) can seal the metal outer pipe 21 to the tubular outer casing 31 of the electric heating pipe 3.
  • the multi-function protective connector of the electric heating tube head of the embodiment can effectively prevent the heated medium from leaking from the thermal conductive insulating medium of the electric heating tube inner core 32, and can effectively prevent external moisture from entering the inner core 32 of the electric heating tube, thereby ensuring The insulating property of the thermally conductive insulating medium of the inner core 32 of the electric heating tube is realized, thereby achieving multifunctional protection.
  • the electric heating pipe head multifunctional protection connector of the present embodiment includes a pipe joint 1 and a sealed pipe assembly 2.
  • the sealed tube assembly 2 includes a length of metal outer tube 21 and a center conductor 22 at the center of the metal outer tube 21, and the central conductor 22 and the metal outer tube 21 are hermetically sealed by a sealing sleeve 24 of polytetrafluoroethylene material.
  • the center conductor 22 is composed of a front conductive bar 221 located at the front stage, a rear conductive bar 222 located at the rear stage, and a fuse 223 connected between the front conductive bar 221 and the rear conductive bar 222.
  • the front end of the front conductive bar 221 of the center conductor 22 has a structure that can be mated with the lead-out conductor 33 of the electric heating tube 3, and the rear end of the rear conductive bar 222 of the center conductor 22 has a lead-out bar 23 connectable to an external power source.
  • the outer periphery of the fuse 223 is sleeved with an inner sleeve 25 of a polytetrafluoroethylene material, and the inner sleeve 25 is located inside the sealing tube 24.
  • the fuse 223 may be in the shape of a coil spring so that it can be elastically stretched in the axial direction.
  • the pipe joint 1 (using a known ferrule pipe joint) can seal the metal outer pipe 21 to the tubular outer casing 31 of the electric heating pipe 3.
  • the multi-function protective connector of the electric heating tube head of the embodiment can effectively prevent the heated medium from leaking from the thermal conductive insulating medium of the electric heating tube inner core 32, and can effectively prevent external moisture from entering the electric heating tube inner core 32, thereby ensuring electric heating.
  • the insulating property of the thermally conductive insulating medium of the inner core 32 of the tube in particular, can also effectively protect the single electric heating tube from overcurrent protection, thereby further achieving multifunctional protection.
  • a central conductor 22 is inserted into a portion of a Teflon material sealing sleeve 24 that is in clearance engagement with the center conductor 22.
  • One end of the center conductor 22 has a structure that can be mated with the lead-out conductor 33 of the electric heating tube 3, and the other end of the center conductor 22 has an extraction rod 23 that can be connected to an external power source.
  • the sealing sleeve 24 after the center conductor 22 is inserted is inserted into a section of the metal outer tube 21, and the sealing sleeve 24 is in clearance fit with the metal outer tube 21.
  • the metal outer tube 21 after the sealing sleeve 24 is inserted is subjected to a diameter reducing treatment on the reducing device, and the sealing sleeve 24 is pressed to seal the sealing sleeve 24 between the center conductor 22 and the metal outer tube 21.
  • the outer diameter of the metal outer tube 21 and the tubular outer casing 31 of the electric heating tube 3 are respectively inserted from both ends of the pipe joint 1, and the lead end conductor 33 of the electric heating pipe 3 is screwed with the center conductor 22 Then, the metal outer tube 21 is sealingly connected to the tubular outer casing 31 of the electric heating tube 3 through the pipe joint 1.
  • the inner sleeve 25 of a piece of polytetrafluoroethylene material is placed on a section of the fuse 223, and the ends of the fuse 223 are press-bonded to the front conductive rod 221 and the rear conductive rod 222 to form a center conductor 22.
  • the center conductor 22 is inserted into a sealing sleeve 24 of a Teflon material, and the sealing sleeve 24 is mated with the front and rear conductive bars 221, 222.
  • the sealing sleeve 24 after the center conductor 22 is inserted is inserted into a section of the metal outer tube 21, and the sealing sleeve 24 is in clearance fit with the metal outer tube 21.
  • the metal outer tube 21 after the sealing sleeve 24 is inserted is subjected to a diameter reducing treatment on the reducing device, and the sealing sleeve 24 is pressed to seal the sealing sleeve 24 between the front and rear conductive rods 221 and 222 and the metal outer tube 21. .
  • the outer diameter of the metal outer tube 21 and the tubular outer casing 31 of the electric heating tube 3 are inserted from both ends of the pipe joint 1, and the lead end conductor 33 of the electric heating tube 3 is screwed to the front conductive rod 221 Then, the metal outer tube 21 and the tubular outer casing 31 of the electric heating tube 3 are hermetically connected by a pipe joint 1.
  • the multifunctional protective connector of the present invention can reliably seal the electric heating tube head, thereby effectively preventing the leakage of the heated medium from the thermal conductive insulating medium of the inner core of the electric heating tube, and effectively preventing external moisture from entering the electric heating.
  • the inner core of the tube ensures the insulation performance of the thermally conductive insulating medium of the inner core of the electric heating tube.
  • the center conductor of the present invention is effectively sealed by a built-in fuse, so that an overcurrent protection of a single electric heating pipe can be effectively performed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Heating (AREA)

Abstract

一种电加热管管头多功能防护连接器及电加热管管头密封方法，该电加热管管头多功能防护连接器包括管接头（1）和密封管组件（2）；所述密封管组件包括一段金属外管（21）和位于金属外管中心的中心导体（22），中心导体一端具有能够与电加热管（3）引出端导体（33）配合连接的结构，中心导体另一端具有能够与外部电源连接的引出棒（23）；中心导体和金属外管之间由聚四氟乙烯材料的密封套（24）密封填充；管接头能够将金属外管与电加热管的管状外壳（31）密封连接。多功能防护连接器既能有效防止被加热介质从电加热管内芯的导热绝缘介质泄漏，又能有效防止外部潮气进入电加热管内芯，保证了电加热管内芯的导热绝缘介质的绝缘性能，还能够有效地对单根电加热管进行过流保护。

Description

电加热管管头多功能防护连接器及电加热管管头密封方法 技术领域
本发明属于电加热元件技术领域，具体是一种电加热管管头多功能防护连接器及电加热管管头密封方法。
背景技术
采用电加热管作为电热元件的电加热器中，电加热管的端部(也称电加热管管头，见图1)通常通过引出端导体33与接线盒内的电源端子进行连接，电加热管的管状外壳31则通常与容器密封连接，以保证容器内的被加热介质不会泄漏。
但是，在实际使用中，位于容器内的部分电加热管外壳有时会因过热而产生破裂，导致被加热介质进入电加热管外壳内，再通过电加热管内芯32中的导热绝缘介质(如氧化镁粉)从电加热管的端部渗出，从而导致被加热介质泄漏。
另外，现有的电加热管还存在外部潮气容易进入电加热管内芯32、从而影响导热绝缘介质绝缘性能的问题。
对于一些大功率的工业电加热器，通常需要采用较多数量的电加热管同时工作，现有的电加热管的过流保护系统监控的是所有电加热管的整体电流，因此当单根电加热管过流时，过流保护系统难以及时发现和保护，从而造成电加热管过流损坏。
发明内容
本发明的第一目的在于提供一种既能有效防止被加热介质从电加热管内芯的导热绝缘介质泄漏、又能保证电加热管内芯的导热绝缘介质绝缘性能的电加热管管头多功能防护连接器。
本发明的第二目的在于提供一种既能有效防止被加热介质从电加热管内芯的导热绝缘介质泄漏、又能保证电加热管内芯的导热绝缘介质绝缘性能的电加热管管头密封方法。
实现本发明第一目的的技术方案是：一种电加热管管头多功能防护连接器，包括管接头和密封管组件；所述密封管组件包括一段金属外管和位于金属外管中心的中心导体，中心导体一端具有能够与电加热管引出端导体配合连接的结构，中心导体另一端具有能够与外部电源连接的引出棒；中心导体和金属外管之间由聚四氟乙烯材料的密封套密封填充；所述管接头能够将金属外管与电加热管的管状外壳密封连接。
进一步地，为了能够对单根电加热管进行过流保护，所述中心导体由位于前段的前导电棒、位于后段的后导电棒及连接在前导电棒和后导电棒之间的保险丝组成，前导电棒能够连接电加热管的引出端导体，后导电棒后端为所述引出棒。所述保险丝外围套有一段聚四氟乙烯材料的内套管，内套管位于密封套内。
所述管接头为已知的卡套管接头。
实现本发明第二目的的技术方案是：一种电加热管管头密封方法，包括以下步骤：①将一段聚四氟乙烯材料的内套管套在一段保险丝上，保险丝两端与前导电棒和后导电棒压接连接，形成中心导体。将中心导体插入一段聚四氟乙烯材料的密封套中，密封套与前、后导电棒间隙配合。②将插好中心导体后的密封套插入一段金属外管中，密封套与金属外管间隙配合。在缩径设备上对插好密封套后的金属外管进行缩径处理，挤压密封套，使密封套密封填充在前、后导电棒与金属外管之间。③将缩径处理后的金属外管与电加热管的管状外壳端部从管接头的两端插入，同时将电加热管的引出端导体与前导电棒通过螺纹连接，然后通过管接头将金属外管与电加热管的管状外壳密封连接。
附图说明
图1为现有技术的电加热管管头的结构示意图。
图2为本发明的实施例1的电加热管管头多功能防护连接器的纵剖面示意图。
图3为本发明的实施例2的电加热管管头多功能防护连接器的纵剖面示意图。
具体实施方式
(实施例1)
如图2所示，本实施例的电加热管管头多功能防护连接器包括管接头1和密封管组件2。
密封管组件2包括一段金属外管21和位于金属外管21中心的中心导体22，中心导体22与金属外管21之间由聚四氟乙烯材料的密封套24密封填充。
中心导体22的一端具有能够与电加热管3的引出端导体33配合连接的结构，中心导体22的另一端具有能够与外部电源连接的引出棒23。
管接头1(可采用已知的卡套式管接头)能够将金属外管21与电加热管3的管状外壳31密封连接。
本实施例的电加热管管头多功能防护连接器既能有效防止被加热介质从电加热管内芯32的导热绝缘介质泄漏，又能有效防止外部潮气进入电加热管内芯32，保证 了电加热管内芯32的导热绝缘介质的绝缘性能，从而实现多功能防护。
(实施例2)
如图3所示，本实施例的电加热管管头多功能防护连接器包括管接头1和密封管组件2。
密封管组件2包括一段金属外管21和位于金属外管21中心的中心导体22，中心导体22与金属外管21之间由聚四氟乙烯材料的密封套24密封填充。
中心导体22由位于前段的前导电棒221、位于后段的后导电棒222及连接在前导电棒221与后导电棒222之间的保险丝223组成。
中心导体22的前导电棒221的前端具有能够与电加热管3的引出端导体33配合连接的结构，中心导体22的后导电棒222的后端具有能够与外部电源连接的引出棒23。
保险丝223外围套有一段聚四氟乙烯材料的内套管25，内套管25位于密封管24内。该保险丝223可以为螺旋弹簧形状，从而使其可轴向弹性伸缩。
管接头1(可采用已知的卡套式管接头)能够将金属外管21与电加热管3的管状外壳31密封连接。
本实施例的电加热管管头多功能防护连接器既能有效防止被加热介质从电加热管内芯32的导热绝缘介质泄漏，又能有效防止外部潮气进入电加热管内芯32，保证了电加热管内芯32的导热绝缘介质的绝缘性能，尤其是还能够有效地对单根电加热管进行过流保护，从而进一步实现多功能防护。
(实施例3)
本实施例的电加热管管头密封方法包括以下步骤：
①将一中心导体22插入一段聚四氟乙烯材料的密封套24中，密封套24与中心导体22间隙配合。
中心导体22的一端具有能够与电加热管3的引出端导体33配合连接的结构，中心导体22的另一端具有能够与外部电源连接的引出棒23。
②将插好中心导体22后的密封套24插入一段金属外管21中，密封套24与金属外管21间隙配合。
在缩径设备上对插好密封套24后的金属外管21进行缩径处理，挤压密封套24，使密封套24密封填充在中心导体22与金属外管21之间。
③将缩径处理后的金属外管21与电加热管3的管状外壳31端部分别从管接头1的两端插入，同时将电加热管3的引出端导体33与中心导体22通过螺纹连接，然后通过管接头1将金属外管21与电加热管3的管状外壳31密封连接。
(实施例4)
本实施例的电加热管管头密封方法包括以下步骤：
①将一段聚四氟乙烯材料的内套管25套在一段保险丝223上，保险丝223两端与前导电棒221和后导电棒222压接连接，形成中心导体22。
将中心导体22插入一段聚四氟乙烯材料的密封套24中，密封套24与前、后导电棒221、222间隙配合。
②将插好中心导体22后的密封套24插入一段金属外管21中，密封套24与金属外管21间隙配合。
在缩径设备上对插好密封套24后的金属外管21进行缩径处理，挤压密封套24，使密封套24密封填充在前、后导电棒221、222与金属外管21之间。
③将缩径处理后的金属外管21和电加热管3的管状外壳31端部从管接头1的两端插入，同时将电加热管3的引出端导体33与前导电棒221通过螺纹连接，然后通过管接头1将金属外管21和电加热管3的管状外壳31密封连接。
工业应用性
本发明具有的积极效果：
(1)本发明的多功能防护连接器能够对电加热管管头进行可靠密封，这样既能有效防止被加热介质从电加热管内芯的导热绝缘介质泄漏，又能有效防止外部潮气进入电加热管内芯，保证了电加热管内芯的导热绝缘介质的绝缘性能。
(2)本发明的中心导体通过内置保险丝并有效进行密封，从而能够有效地对单根电加热管进行过流保护。

Claims (8)

  1. 一种电加热管管头多功能防护连接器，其特征是：
    包括管接头(1)和密封管组件(2)；
    所述密封管组件(2)包括一段金属外管(21)、位于所述金属外管(21)中心的中心导体(22)及密封填充在所述金属外管(21)与所述中心导体(22)之间的密封套(24)；
    所述中心导体(22)的一端具有能够与电加热管(3)的引出端导体(33)配合连接的结构，所述中心导体(22)的另一端具有能够与外部电源连接的引出棒(23)；
    所述管接头(1)能够将所述金属外管(21)与所述电加热管(3)的管状外壳(31)密封连接。
  2. 根据权利要求1所述的电加热管管头多功能防护连接器，其特征是：所述密封套(24)为聚四氟乙烯材料。
  3. 根据权利要求1或2所述的电加热管管头多功能防护连接器，其特征是：所述中心导体(22)由位于前段的前导电棒(221)、位于后段的后导电棒(222)及连接在所述前导电棒(221)与所述后导电棒(222)之间的保险丝(223)组成；所述能够与电加热管(3)的引出端导体(33)配合连接的结构设于所述前导电棒(221)的前端，所述引出棒(23)设于所述后导电棒(222)的后端，所述保险丝(223)外围套有一段内套管(25)，所述内套管(25)位于所述密封套(24)内。
  4. 根据权利要求3所述的电加热管管头多功能防护连接器，其特征是：所述内套管(25)为聚四氟乙烯材料。
  5. 一种电加热管管头密封方法，其特征是包括以下步骤：
    ①将一中心导体(22)插入一段密封套(24)中，所述密封套(24)与所述中心导体(22)间隙配合；所述中心导体(22)的一端具有能够与电加热管(3)的引出端导体(33)配合连接的结构，所述中心导体(22)的另一端具有能够与外部电源连接的引出棒(23)；
    ②将插好所述中心导体(22)后的密封套(24)插入一段金属外管(21)中，所述密封套(24)与所述金属外管(21)间隙配合；
    在缩径设备上对插好所述密封套(24)后的金属外管(21)进行缩径处理，挤压所述密封套(24)，使所述密封套(24)密封填充在所述中心导体(22)与所述金属外管(21)之间；
    ③将缩径处理后的金属外管(21)与电加热管(3)的管状外壳(31)端部分别从管接头(1)的两端插入，同时将电加热管(3)的引出端导体(33)与所述中心导体(22)通过螺纹连接，然后通过管接头(1)将金属外管(21)与电加热管(3)的管状外壳(31)密封连接。
  6. 根据权利要求5所述的电加热管管头密封方法，其特征是：所述的密封套(24)为聚四氟乙烯材料。
  7. 根据权利要求5或6所述的电加热管管头密封方法，其特征是：
    步骤①中所述的中心导体(22)是将一段内套管(25)套在一段保险丝(223)上，并使所述保险丝(223)的前后两端分别与一前导电棒(221)及一后导电棒(222)压接连接而形成；所述能够与电加热管(3)的引出端导体(33)配合连接的结构设于所述前导电棒(221)的前端，所述引出棒(23)设于所述后导电棒(222)的后端；所述密封套(24)与所述中心导体(22)中的前、后导电棒(221、222)间隙配合；
    步骤②中所述密封套(24)密封填充在所述前、后导电棒(221、222)与所述金属外管(21)之间；
    步骤③中所述电加热管(3)的引出端导体(33)与所述前导电棒(221)通过螺纹连接。
  8. 根据权利要求7所述的电加热管管头密封方法，其特征是：所述的内套管(25)为聚四氟乙烯材料。
PCT/CN2014/093091 2014-06-06 2014-12-05 电加热管管头多功能防护连接器及电加热管管头密封方法 WO2015184755A1 (zh)

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