WO2024037279A1 - 一种无热桥热力管道固定节 - Google Patents

一种无热桥热力管道固定节 Download PDF

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Publication number
WO2024037279A1
WO2024037279A1 PCT/CN2023/108614 CN2023108614W WO2024037279A1 WO 2024037279 A1 WO2024037279 A1 WO 2024037279A1 CN 2023108614 W CN2023108614 W CN 2023108614W WO 2024037279 A1 WO2024037279 A1 WO 2024037279A1
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Prior art keywords
pipe
thermal
working
short pipe
inner sleeve
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PCT/CN2023/108614
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English (en)
French (fr)
Inventor
刘领诚
董霞
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上海科华热力管道有限公司
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Publication of WO2024037279A1 publication Critical patent/WO2024037279A1/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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/028—Composition or method of fixing a thermally insulating material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

Definitions

  • the invention relates to a thermal pipeline used for transmitting high-temperature media, and in particular to a thermal bridge-free fixed joint of the thermal pipeline.
  • FIG. 1 is a schematic diagram of a fixed joint of a directly buried steam insulation pipe in the prior art.
  • a tapered tube 1-1 is provided in the outer shell for the working pipe 1 to pass through.
  • the tapered tube 1-1 provides a radial direction for the inner steel pipe.
  • Support, the outer edge of the tapered tube is connected to the outer shell by welding.
  • the heat of the inner steel pipe will be conducted to the end of the tapered tube 1-1 to form a thermal bridge effect. Therefore, there is a large temperature difference between the surface of the outer tube close to the tapered tube 1-1 and the soil layer.
  • the heat of the thermal pipe network here The loss increased sharply. If things continued like this, the anti-corrosion layer on the surface of the outer steel pipe close to the tapered pipe 1-1 was rapidly damaged, thus affecting the sealing inside the pipe and causing the thermal pipe network to be scrapped early.
  • the invention provides a thermal bridge-free thermal pipeline fixed joint.
  • the thermal pipeline fixed joint is equipped with a working pipe for medium circulation, and at least one short inner sleeve short pipe is fixed on the outer diameter of the working pipe along the circumferential direction.
  • the periphery of the working pipe and the inner casing short pipe are respectively provided with a steel outer casing and a steel outer casing short pipe;
  • Hard insulation materials are filled between the working pipe and the outer steel pipe and between the inner short pipe and the outer short pipe.
  • the hard insulation materials are hard microporous silicic acid from the inside to the outside. Calcium tiles and layers of rigid polyurethane foam.
  • the compressive strength of the hard microporous calcium silicate tile is 0.6Mpa ⁇ 2.0Mpa
  • the compressive strength of the rigid polyurethane foam is 0.3Mpa ⁇ 2.0Mpa.
  • the inner casing short pipe is a steel pipe and is welded to the working pipe.
  • the outer short pipe is a steel pipe and is welded and connected to the outer steel pipe.
  • a plurality of limiting inner sleeve short tubes provided on the outer diameter of the working pipe are evenly arranged in the circumferential direction of the working pipe, or evenly arranged along the axis of the working pipe.
  • the bottom of the outer jacket short pipe is provided with a lower bottom plate, and the lower bottom plate is welded and connected to the outer jacket short pipe to meet the sealing and waterproof requirements.
  • auxiliary thermal insulation layer is thermal insulation cotton.
  • the present invention adopts the above mechanism, replaces the traditional tapered tube used to transmit axial thrust with a hollow support, and fills the inside and outside of the support with insulation cotton and hard insulation materials.
  • the invention eliminates the need for The thermal bridge effect can significantly reduce the additional heat dissipation of the thermal pipe network while achieving the steam pipe positioning requirements; at the same time, it can slow down the failure of the anti-corrosion layer due to overheating on the outer shell surface, greatly increasing the service life of the thermal pipe network.
  • Figure 1 is a cross-sectional view of a directly buried high-temperature steam pipeline that is prone to thermal bridge effects in the prior art
  • Figure 2 is a side cross-sectional view of a thermal bridge-free thermal pipe fixed joint provided by the present invention
  • Figure 3 is a cross-sectional view along the A-A direction in Figure 2 .
  • the present invention provides a thermal bridge-free fixed joint of a thermal pipeline.
  • the fixed joint of the thermal pipeline is equipped with a working pipe 1 for medium circulation. At least one piece is fixed on the outer diameter of the working pipe 1 along the circumferential direction.
  • the limiting inner sleeve short pipe 2, the working pipe 1 and the inner sleeve short pipe 2 are respectively provided with a steel outer sleeve 5 and a steel outer sleeve short pipe 6 on the periphery.
  • Between the working pipe 1 and the outer steel pipe 5 and between the inner short pipe 2 and the outer short pipe 6 are filled with hard insulation materials. From the inside to the outside, the hard insulation materials are hard microporous calcium silicate tiles 3 and Rigid polyurethane foam layer 4.
  • the short tube 2 of the limiting inner sleeve is a hollow structure made of the same material as the working tube 1.
  • the short pipe 2 of the limiting inner sleeve is a steel pipe.
  • the upper end of the steel pipe is provided with a concave arc surface that fits the outer diameter of the working pipe 1.
  • the upper end surface is welded and fixed to the working pipe 1.
  • a lower bottom plate 8 is provided at the bottom of the short jacket pipe 6, and the lower bottom plate 8 and the short jacket pipe 6 are welded and connected to meet the sealing and waterproof requirements.
  • the gap and the inner cavity of the inner casing short tube 2 are filled with an auxiliary insulation layer 7.
  • the auxiliary insulation layer 7 can be made of soft insulation cotton. .
  • the short tube 2 of the limiting inner sleeve is covered with a hard insulation material 3.
  • the hard insulation material 3 can withstand the work of the working pipe 1, the polyurethane foam 4 and the first outer sleeve 5. Therefore, in the present invention, the compressive strength of the hard microporous calcium silicate tile 3 is 0.6Mpa ⁇ 2.0Mpa, and the compressive strength of the rigid polyurethane foam 4 is 0.3Mpa ⁇ 2.0Mpa. Undertake the force of the short pipe 2 of the limiting inner sleeve to ensure the stability of the support structure.
  • the limiting assembly composed of the inner short tube 2, the outer short tube 6, the hard microporous calcium silicate tile 3, and the hard polyurethane foam layer 4 can be provided in one group or in several groups. They can be arranged symmetrically or evenly in the circumferential direction of the working pipe 1 , or evenly arranged along the axis of the working pipe 1 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)

Abstract

一种无热桥热力管道固定节，热力管道固定节配置有供介质流通的工作管（1），在工作管外径沿周向固定有至少一件限位内套短管（2），工作管和内套短管的外围分别设有钢制外套管（5）和钢制外套短管（6）；在工作管和外套钢管之间以及内套短管与外套短管之间均填充有硬质保温材料，硬质保温材料由内向外依次为硬质微孔硅酸钙瓦（3）和硬质聚氨酯泡沫层（4）。将传统用来传递轴向推力的锥形管替换为空心的支撑件，并且在支撑件内外分别填充保温棉和硬质保温材料，在保证承接足够大推力的前提下，消除了热桥效应，进而可以确保蒸汽管的指定位置不产生位移；同时可以减缓外壳体表面因过热使得防腐层失效，大大增加了热力管网的使用寿命。

Description

一种无热桥热力管道固定节 技术领域
本发明涉及用于传输高温介质的热力管道，具体涉及到一种无热桥热力管道固定节。
背景技术
目前，预制保温热力管道技术已在全国普遍推广，对于直埋敷设保温管网系统和架空保温管网系统，管道的外保温已经在广泛研究和优化的过程中日趋完善，有效地降低了整个供热管网系统的热量损失。
图1为现有技术的一种蒸汽直埋保温管固定节示意图，在外壳体内设有供工作管1穿过的锥形管1-1，由锥形管1-1为内钢管提供径向支撑，锥形管的外沿通过焊接与外壳体相连。内钢管的热量会传导到锥形管1-1的末端形成热桥效应，因此靠近锥形管1-1的外套管表面与土层两者存在很大的温度差，此处热力管网热损失急剧升高，长此以往，靠近锥形管1-1的外钢管表面的防腐层迅速损坏，从而影响管道内部的密封，导致热力管网提前报废。
发明内容
本发明提供了一种无热桥热力管道固定节，所述热力管道固定节配置有供介质流通的工作管，在所述工作管外径沿周向固定有至少一件限位内套短管，所述工作管和所述内套短管的外围分别设有钢制外套管和钢制外套短管；
在所述工作管和所述外套钢管之间以及所述内套短管与外套短管之间均填充有硬质保温材料，所述硬质保温材料由内向外依次为硬质微孔硅酸钙瓦和硬质聚氨酯泡沫层。
进一步的，所述硬质微孔硅酸钙瓦的抗压强度为0.6Mpa～2.0Mpa，所述硬质聚氨酯泡沫的抗压强度为0.3Mpa～2.0Mpa。
进一步的，所述内套短管为钢制管道，与所述工作管焊接连接。
进一步的，所述外套短管为钢制管道，与所述外套钢管焊接连接。
进一步的，在所述工作管外径设置的多个限位内套短管在工作管的圆周方向均匀布置，或者沿工作管轴线均匀布置。
进一步的，当固定节用于直埋敷设热力管网时，所述外套短管的底部设有下底板，下底板与外套短管焊接连接，满足密封防水要求。
进一步的，所述内套短管和下底板之间留有间隙，在所述间隙内和所述内套短管的内腔均填充有辅助保温层。
进一步的，所述辅助保温层为保温棉。
本发明采用了上述机构，将传统用来传递轴向推力的锥形管替换为空心的支撑件，并且在支撑件内外分别填充保温棉和硬质保温材料，在保证推力的前提下，消除了热桥效应，进而可以在实现蒸汽管定位要求同时，显著地减少了热力管网的附加散热；同时可以减缓外壳体表面因过热使得防腐层失效，大大增加了热力管网的使用寿命。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单的介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术中容易形成热桥效应的直埋高温蒸汽管道截面图；
图2为本发明提供的一种无热桥热力管道固定节的侧面剖视图；
图3为图2中A-A方向的截面图。
具体实施方式
在下文的描述中，给出了大量具体的细节以便提供对本发明更为彻底的理解。然而，对于本领域技术人员而言显而易见的是，本发明可以无需一个或多个这些细节而得以实施。在其他的例子中，为了避免与本发明发生混淆， 对于本领域公知的一些技术特征未进行描述。
为了彻底理解本发明，将在下列的描述中提出详细的步骤以及详细的结构，以便阐释本发明的技术方案。本发明的较佳实施例详细描述如下，然而除了这些详细描述外，本发明还可以具有其他实施方式。
参照图2-3所示，本发明提供了一种无热桥热力管道固定节，热力管道固定节配置有供介质流通的工作管1，在工作管1外径沿周向固定有至少一件限位内套短管2，工作管1和内套短管2的外围分别设有钢制外套管5和钢制外套短管6。在工作管1和外套钢管5之间以及内套短管2与外套短管6之间均填充有硬质保温材料，硬质保温材料由内向外依次为硬质微孔硅酸钙瓦3和硬质聚氨酯泡沫层4。
限位内套短管2为与工作管1材质相同的空心结构。在一实施例中，限位内套短管2为钢管，钢管的上端设有与工作管1外径相贴合的凹弧面，上端面与工作管1焊接固定。
当本发明用于直埋敷设热力管网时，外套短管6的底部设有下底板8，下底板8与外套短管6焊接连接，满足密封防水要求。作为可选项，内套短管2和下底板8之间留有间隙，在间隙内和内套短管2的内腔均填充有辅助保温层7，辅助保温层7可选用软质的保温棉。通过在空心结构的限位内套短管2内外分别填充保温棉和硬质保温材料，使得本发明具备了良好的隔热保温性能。
在一可选的实施例中，限位内套短管2外围包覆有硬质保温材料3，硬质保温材料3可以承受着工作管1、聚氨酯泡沫4和第一外套管5承受着工作管巨大的轴向力，因此在本发明中，硬质微孔硅酸钙瓦3的抗压强度为0.6Mpa～2.0Mpa，硬质聚氨酯泡沫4的抗压强度为0.3Mpa～2.0Mpa，以承接限位内套短管2的作用力，保障支撑结构的稳定性。
在本发明中，由内套短管2、外套短管6和硬质微孔硅酸钙瓦3、硬质聚氨酯泡沫层4构成的限位组件，可以设一组，也可以设几组，既可以在工作管1的圆周方向对称布置或均匀布置，也可以沿工作管1轴线均匀布置。
本发明的优点在于：
1)采用空心的支撑件，并在空心支撑件的内部以及空心支撑件与底板之间均填充有保温棉，可以大幅度减少传导到支撑件末端的热量，有效避免壳体由于长期经受高温导致外表面防腐层脱落的问题；
2)在支撑件外设有硬质保温材料，在起到保温作用的同时，为上方的管道提供支撑。
以上对本发明的较佳实施例进行了描述。需要理解的是，本发明并不局限于上述特定实施方式，其中未尽详细描述的设备和结构应该理解为用本领域中的普通方式予以实施；任何熟悉本领域的技术人员，在不脱离本发明技术方案范围情况下，都可利用上述揭示的方法和技术内容对本发明技术方案做出许多可能的变动和修饰，或修改为等同变化的等效实施例，这并不影响本发明的实质内容。因此，凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所做的任何简单修改、等同变化及修饰，均仍属于本发明技术方案保护的范围内。

Claims (8)

  1. 一种无热桥热力管道固定节，所述热力管道固定节配置有供介质流通的工作管(1)，其特征在于，在所述工作管(1)外径沿周向固定有至少一件限位内套短管(2)，所述工作管(1)和所述内套短管(2)的外围分别设有钢制外套管(5)和钢制外套短管(6)；
    在所述工作管(1)和所述外套钢管(5)之间以及所述内套短管(2)与外套短管(6)之间均填充有硬质保温材料，所述硬质保温材料由内向外依次为硬质微孔硅酸钙瓦(3)和硬质聚氨酯泡沫层(4)。
  2. 如权利要求1所述无热桥热力管道固定节，其特征在于，所述硬质微孔硅酸钙瓦(3)的抗压强度为0.6Mpa～2.0Mpa，所述硬质聚氨酯泡沫(4)的抗压强度为0.3Mpa～2.0Mpa。
  3. 如权利要求1所述无热桥热力管道固定节，其特征在于，所述内套短管(2)为钢制管道，与所述工作管(1)焊接连接。
  4. 如权利要求1所述无热桥热力管道固定节，其特征在于，所述外套短管(6)为钢制管道，与所述外套钢管(5)焊接连接。
  5. 如权利要求1所述无热桥热力管道固定节，其特征在于，所述工作管(1)外径设置的多个限位内套短管(2)在工作管(1)的圆周方向均匀布置，或者沿工作管(1)轴线均匀布置。
  6. 如权利要求1所述无热桥热力管道固定节，其特征在于，当固定节用于直埋敷设热力管网时，所述外套短管(6)的底部设有下底板(8)，下底板(8)与外套短管(6)焊接连接。
  7. 如权利要求6所述无热桥热力管道固定节，其特征在于，所述内套短管(2)和下底板(8)之间留有间隙，在所述间隙内和所述内套短管(2)的内腔均填充有辅助保温层(7)。
  8. 如权利要求7所述无热桥热力管道固定节，其特征在于，所述辅助保温层(7)为保温棉。
PCT/CN2023/108614 2022-08-18 2023-07-21 一种无热桥热力管道固定节 WO2024037279A1 (zh)

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CN110594533A (zh) * 2019-09-28 2019-12-20 上海科华热力管道有限公司 蒸汽管网固定节及其制造工艺
CN213809333U (zh) * 2020-11-02 2021-07-27 山东省环能设计院股份有限公司 一种无热桥直埋钢套钢蒸汽管道固定支架
CN216408186U (zh) * 2021-08-03 2022-04-29 南京苏夏设计集团股份有限公司 一种预制聚氨酯保温固定隔热管托
CN115183087A (zh) * 2022-08-18 2022-10-14 上海科华热力管道有限公司 一种无热桥热力管道固定节
CN218523235U (zh) * 2022-08-18 2023-02-24 上海科华热力管道有限公司 一种无热桥热力管道固定节

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