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    • 2. 发明授权
    • Method and apparatus for molding splices in cables
    • 用于在电缆中成型接头的方法和设备
    • US3970488A
    • 1976-07-20
    • US556519
    • 1975-03-07
    • Arthur L. Nelson
    • Arthur L. Nelson
    • H02G1/14F16G11/00H02G15/196B21F15/02
    • H02G15/196
    • A molded cable splice is formed by wrapping strip-formed semiconducting and insulative thermosetting molding compounds about a layer of semiconducting tape covering a connector and exposed central conductors of a pair of cable ends joined by the connector, and bonding the insulative molding compound to the cable insulation layer in a heated mold having opposing end clamp portions each with an inner surface of a predetermined radius and length. The radius is selected in accordance with the formula ##EQU1## , WHERE R IS THE RADIUS OF THE CABLES TO BE JOINED AND X is a numerical quantity called the cable clamp factor. For cables having an ethylene propylene rubber insulation layer, X lies in the range from about 0.20 to about 0.50; for cables with a cross-linked polyethylene insulation layer, X is partially dependent on insulation thickness W and lies between a lower range of from about 0.50 to about 0.76 for W = 0.175 inch and an upper range of from about 0.87 to about 1.00 for W = 0.900 inch. The axial length of the end clamp portions optimally lies in the range from about 2.5 to about 3.5 inches. The end clamp portions may also be tapered in the outward direction, with the taper angle preferably in the range from 2.degree. to 4.degree., and the radius at substantially the mid-point between the inner and outer boundary of each end clamp portion selected in accordance with the above formula.
    • 通过将带状半导体和绝缘热固性模塑化合物缠绕在覆盖连接器的半导体带的层和通过连接器连接的一对电缆端部的暴露的中心导体之间并将绝缘模塑料粘合到电缆上而形成模制电缆接头 在加热模具中的绝缘层具有相对的端部夹持部分,每个端部夹具部分具有预定半径和长度的内表面。 半径根据公式2rX R = 2ROOT + r2 pi选择,其中R是要加入的电缆的半径,X是称为电缆夹紧因子的数字量。 对于具有乙丙橡胶绝缘层的电缆,X在约0.20至约0.50的范围内; 对于具有交联聚乙烯绝缘层的电缆,X部分地取决于绝缘厚度W,并且对于W = 0.175英寸而言位于约0.50至约0.76的较低范围和对于W的约0.87至约1.00的较高范围 = 0.900英寸。 端部夹持部分的轴向长度最佳地在约2.5至约3.5英寸的范围内。 端部夹持部分也可以在向外的方向上锥形,锥形角优选在2°至4°的范围内,并且在每个端部夹紧部分的内部和外部边界之间的中点处的半径在 按照上述公式。
    • 5. 发明授权
    • Cable molding apparatus for accomplishing same
    • 用于实现其的电缆成型装置
    • US4145176A
    • 1979-03-20
    • US863257
    • 1977-12-22
    • Arthur L. Nelson
    • Arthur L. Nelson
    • B29C45/14B29C45/46B29C73/00H01B13/10H02G1/14H02G1/16B29C6/00
    • H02G1/16B29C45/14549B29C45/46B29C73/00H01B13/103H02G1/145B29C2045/14557
    • A method and apparatus for forming cured polyethylene insulation about high voltage cables by applying uncured polyethylene around a core of the cable. The polyethylene is heated, cured and then cooled to room temperature in a pressurized nitrogen gas atmosphere. In one form the molding apparatus comprises first and second mold forms which define a cavity and which include means for heating the mold halves to the polyethylene curing temperature. Means is also provided to introduce the pressurized nitrogen into the cavity and for subjecting cable portions that extend beyond the mold to pressurized nitrogen until such cable portions are sufficiently cooled to prevent their deformation under pressure, to prevent the oxidation of polyethylene and/or to prevent the formation of voids or enclosures. In another embodiment, the apparatus includes cooling openings for receiving a coolant preselectedly along the molding apparatus, a number of spaced-apart temperature gauges for indicating temperature at various locations along the apparatus, a pressure gauge for indicating pressure in the mold cavity, a heat source and a nitrogen source. At each end of the apparatus are recesses in which soft resilient strips are located. During the molding process, the ends of the molding apparatus are kept at a reduced temperature and the pressure in the mold cavity is varied, the nitrogen being used to pressurize the mold cavity during curing. This method insures a quality repair or splice without detracting from the quality of the cable.
    • 一种用于通过在电缆的芯部周围施加未固化的聚乙烯来形成关于高压电缆的聚乙烯绝缘的方法和装置。 将聚乙烯加热,固化,然后在加压氮气气氛中冷却至室温。 在一种形式中,模制设备包括限定空腔的第一和第二模具形式,并且包括用于将半模加热到聚乙烯固化温度的装置。 还提供了将加压的氮气引入空腔中并且用于使延伸超过模具的电缆部分经受加压氮气直到这种电缆部分被充分冷却以防止其在压力下变形以防止聚乙烯氧化和/或防止的装置 形成空隙或外壳。 在另一个实施例中,该装置包括冷却开口,用于沿模制设备预先接收冷却剂,多个间隔开的温度计,用于指示沿设备的不同位置的温度,用于指示模腔中的压力的​​压力计, 来源和氮源。 在设备的每一端是软弹性条所在的凹槽。 在成型过程中,模制装置的端部保持在降低的温度并且模腔中的压力改变,氮在用于在固化期间对模腔加压。 这种方法确保质量修复或拼接,而不会降低电缆的质量。
    • 6. 发明授权
    • High voltage cable splice apparatus
    • 高压电缆拼接装置
    • US4004867A
    • 1977-01-25
    • US552903
    • 1975-02-25
    • Arthur L. Nelson
    • Arthur L. Nelson
    • H01R43/00H02G1/14B29H5/16B29C27/00
    • H02G1/145Y10S425/802Y10S425/812
    • Apparatus for molding insulation about a relatively short section of an uninsulated conductor of a high voltage cable. The apparatus has a pair of mold forms that define a cavity in which the new insulation is molded. Heat and pressure applying platens on each side of the mold forms are fitted with perpendicularly extending stress bars and removable means mounted to the platen for biasing the latter and, therewith, the mold forms towards each other. The mold forms and at least one platen include a series of cavity vent holes which are tapered and have a major diameter proximate the cavity. A transfer pot is provided for injecting a softened insulating material into the cavity via a passage. One or move transverse bars extend across the center of the passage and prevent entrapped gas or air disposed in the center of the transfer pot from being transferred into cavity. A band heater is applied about a length of cable contiguous with and extending from the mold forms to avoid the formation of permanent bulges in existing cable insulation during the application of heat and pressure to the new insulating material in the mold form cavity.
    • 用于在高压电缆的非绝缘导体的相当短的部分上模制绝缘的装置。 该设备具有一对模具形式,其限定了在其中模制新绝缘体的空腔。 在模具的每一侧上的加热和压力施加压板装配有垂直延伸的应力杆和安装到压板上的可移除装置,用于偏压压板并且因此模具朝向彼此。 模具形成并且至少一个压板包括一系列空腔通气孔,其是锥形的并且具有靠近空腔的大直径。 提供了一个转移盆,用于通过通道将软化的绝缘材料注入空腔。 一个或移动的横杆横过通道的中心延伸,并且防止设置在转移罐中心的夹带的气体或空气被转移到空腔中。 带状加热器围绕与模具形式相邻并延伸的电缆长度施加,以避免在将模具形状空腔中的新绝缘材料施加热和压力期间在现有电缆绝缘体中形成永久的凸起。
    • 7. 发明授权
    • Molding method for splicing electrical cable
    • 电缆拼接成型方法
    • US3970735A
    • 1976-07-20
    • US545948
    • 1975-01-31
    • Arthur L. Nelson
    • Arthur L. Nelson
    • B29C45/14B29C45/46H01B13/10H02G1/14B29C6/00
    • H02G1/145B29C45/14549B29C45/14639B29C45/46H01B13/103B29C2045/14557
    • A method for making splices in high voltage electrical cable and particularly for replacing relatively short sections of previously removed, original insulation. Ends of the original insulation adjoining the section are tapered and fresh insulating material is placed over the section and heated to fluidize it. Pressure is applied to intimately combine the original cable insulation and the newly added splice insulation to thereby effect an interfacing of the original and newly added insulating material. The new insulating material is placed inside the cavity of a mold which includes small apertures communicating the cavity with the exterior and being spaced over the length of the cavity. The fresh insulating material is pressurized by forcing additional material into the cavity to thereby vent entrapped air through the apertures to the exterior. Some of the apertures are selectively opened and closed to effect the venting while propagating the insulating material and the applied pressure throughout the cavity.
    • 一种用于在高压电缆中制作接头的方法,特别是用于替换先前去除的原始绝缘体的较短部分。 邻近该部分的原始绝缘体的端部是锥形的,并且将新鲜的绝缘材料放置在该部分上并加热使其流化。 施加压力以将原有的电缆绝缘层与新添加的接合绝缘层紧密结合,从而实现原始和新添加的绝缘材料的接口。 新的绝缘材料放置在模具的空腔内,该模具包括将空腔与外部连通并且在空腔的长度上间隔开的小孔。 新鲜的绝缘材料通过迫使额外的材料进入空腔而被加压,从而将通过孔的被捕获的空气排出到外部。 一些孔被选择性地打开和关闭,以在传播绝缘材料和施加的整个空腔的压力下实现排气。
    • 8. 发明授权
    • Cable molding method
    • 电缆成型法
    • US4091062A
    • 1978-05-23
    • US541298
    • 1975-01-15
    • Arthur L. Nelson
    • Arthur L. Nelson
    • B29C33/00B29C37/00B29C45/14B29C45/46H01B13/10H02G1/14H02G1/16B29C6/00
    • H01B13/103B29C33/0044B29C37/005B29C45/14549B29C45/46H02G1/145H02G1/16B29C2045/14557Y10S425/13Y10S425/223
    • A method and apparatus for forming cured polyethylene insulation about high voltage cables by applying uncured polyethylene around a core of the cable. The polyethylene is heated, cured and then cooled to room temperature in a pressurized nitrogen gas atmosphere. In one form the molding apparatus comprises first and second mold forms which define a cavity and which include means for heating the mold halves to the polyethylene curing temperature. Means is also provided to introduce the pressurized nitrogen into the cavity and for subjecting cable portions that extend beyond the mold to pressurized nitrogen until such cable portions are sufficiently cooled to prevent their deformation under pressure, to prevent the oxidation of polyethylene and/or to prevent the formation of voids or enclosures. In another embodiment, the apparatus includes cooling openings for receiving a coolant preselectedly along the molding apparatus, a number of spaced-apart temperature gauges for indicating temperature at various locations along the apparatus, a pressure gauge for indicating pressure in the mold cavity, a heat source and a nitrogen source. At each end of the apparatus are recesses in which soft resilient strips are located. During the molding process, the ends of the molding apparatus are kept at a reduced temperature and the pressure in the mold cavity is varied, the nitrogen being used to pressurize the mold cavity during curing. This method insures a quality repair or splice without detracting from the quality of the cable.
    • 一种用于通过在电缆的芯部周围施加未固化的聚乙烯来形成关于高压电缆的聚乙烯绝缘的方法和装置。 将聚乙烯加热,固化,然后在加压氮气气氛中冷却至室温。 在一种形式中,模制设备包括限定空腔的第一和第二模具形式,并且包括用于将半模加热到聚乙烯固化温度的装置。 还提供了将加压的氮气引入空腔中并且用于使延伸超过模具的电缆部分经受加压氮气直到这种电缆部分被充分冷却以防止其在压力下变形以防止聚乙烯氧化和/或防止的装置 形成空隙或外壳。 在另一个实施例中,该装置包括冷却开口,用于沿模制设备预先接收冷却剂,多个间隔开的温度计,用于指示沿设备的不同位置的温度,用于指示模腔中的压力的​​压力计, 来源和氮源。 在设备的每一端是软弹性条所在的凹槽。 在成型过程中,模制装置的端部保持在降低的温度并且模腔中的压力改变,氮在用于在固化期间对模腔加压。 这种方法确保质量修复或拼接,而不会降低电缆的质量。