WO2023071057A1 - 带泄漏报警功能的螺旋板式换热器 - Google Patents

带泄漏报警功能的螺旋板式换热器 Download PDF

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Publication number
WO2023071057A1
WO2023071057A1 PCT/CN2022/085429 CN2022085429W WO2023071057A1 WO 2023071057 A1 WO2023071057 A1 WO 2023071057A1 CN 2022085429 W CN2022085429 W CN 2022085429W WO 2023071057 A1 WO2023071057 A1 WO 2023071057A1
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Prior art keywords
plate
heat conduction
spiral
leakage
heat exchanger
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PCT/CN2022/085429
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English (en)
French (fr)
Inventor
王捷
王电辉
王汪洋
顾临风
李立超
王丽婷
龚智旭
吴善行
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浙江尔格科技股份有限公司
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Publication of WO2023071057A1 publication Critical patent/WO2023071057A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/04—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by spirally-wound plates or laminae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/16—Safety or protection arrangements; Arrangements for preventing malfunction for preventing leakage

Definitions

  • the invention relates to a spiral plate heat exchanger, in particular to a spiral plate heat exchanger with a leakage alarm function, which can alarm in time when liquid leakage occurs.
  • the heat exchange body of the spiral plate heat exchanger is made of two heat-conducting plates (usually steel plates). After the two heat-conducting plates are rolled, two spiral plates are formed. The two spiral plates are arranged in parallel to form two spiral channels. , The two heat transfer media can carry out full countercurrent flow, and the heat exchange effect is good. Even if the two mediums have a small temperature difference, they can also achieve the ideal heat exchange effect.
  • a certain number of spacer columns are arranged in the two spiral channels. In the prior art, the spacer column is usually welded on the spiral plate.
  • the purpose of the present invention is to provide a spiral plate heat exchanger with leakage alarm function.
  • the spiral plate heat exchanger with leakage alarm function of the present invention can quickly guide the leakage to the leakage alarm when leakage occurs at the connection between the spiral plate and the fixed-distance column, triggering an alarm, and avoiding losses and accidents .
  • the spiral plate heat exchanger with leakage alarm function includes a heat exchange body; the heat exchange body includes two spiral plates wound into a spiral shape, and the two spiral plates are arranged in parallel to form a primary medium flow channel and a secondary medium flow channel; the primary medium flow channel and the secondary medium flow channel are provided with spacer columns for positioning the spiral plate; the spiral plate is a composite plate, which consists of the first heat conducting plate and the first heat conducting plate
  • the second heat conduction plate is formed by bonding the plates; the bonding surface of the first heat conduction plate and the second heat conduction plate is provided with a leakage drainage channel; the distribution of the spacer columns along the leakage drainage channel
  • the path is set so that when leakage occurs at the connection between the spiral plate and the distance column, the leakage liquid will enter the leakage drainage channel and flow down along the leakage drainage channel; the lower end of the heat exchange body is provided with a leakage collection
  • the plate is used to collect the leaked liquid flowing out from the lower end of the leaked liquid drainage channel; the leaked liquid
  • the spiral plate forming the heat exchange body is a composite plate, and the composite plate is composed of the first heat conduction plate and the first heat conduction plate.
  • the combined second heat conduction plate is composed of a leakage drainage channel on the bonding surface, and the distance column is arranged along the distribution path of the leakage drainage channel, and a leakage collection plate is provided at the lower end of the heat exchange body to collect the leakage
  • the plate is connected to the leakage alarm through the diversion tube.
  • drainage grooves are processed on the first heat conduction plate and/or the second heat conduction plate, so that the leakage liquid drainage channel is formed after the first heat conduction plate and the second heat conduction plate are bonded together.
  • the leakage liquid drainage channel is obtained by processing the drainage groove on the heat conduction plate, and the structure is reliable and easy to implement.
  • the drainage grooves include inclined grooves arranged in groups, and the inclined grooves extend from the top to the bottom of the fitting surface.
  • the leakage liquid can flow down the chute.
  • the drainage groove further includes at least one horizontal groove, and the horizontal groove communicates each inclined groove with each other.
  • the chutes are connected to each other by setting the horizontal grooves. When liquid leakage occurs at the upper part of the horizontal grooves, the leaked liquid flows down the horizontal grooves to the horizontal grooves, and then can be diverted to other chutes through the horizontal grooves to speed up the downward leakage. The flow speed enables the alarm to be triggered faster.
  • the number of the transverse grooves may be three, which are respectively provided on the upper, middle and lower parts of the bonding surface. Therefore, when liquid leakage occurs at different height positions, the flow can be diverted through the horizontal groove in time.
  • the thickness of the first heat conduction plate is larger than that of the second heat conduction plate, and the drainage groove is arranged on the first heat conduction plate.
  • the drainage grooves are concentrated on the first heat conduction plate, which is beneficial to improve processing efficiency and reduce costs.
  • the thickness of the first heat conduction plate is larger than that of the second heat conduction plate, so that after the first heat conduction plate is grooved, the grooved part still has high strength. long lasting.
  • the thickness of the first heat conducting plate may account for 60-70% of the thickness of the spiral plate.
  • the first heat conduction plates of the two spiral plates face each other to form the primary medium flow channel or the secondary medium flow channel.
  • the thicker first heat conduction plate forms a medium flow channel
  • the thinner second heat conduction plate forms another medium flow channel. It circulates in the flow channel of the medium, and the safety is better.
  • the water for example, in the oil-water cooler used in transformers, once water (secondary medium) enters the transformer, it is likely to cause major losses and safety accidents. Let the water circulate between the two first heat conducting plates. Due to the thickness of the first heat conducting plate Large, high strength, less prone to leakage than the second heat conduction plate.
  • first heat conduction plate and the second heat conduction plate are bonded by heat conduction silica gel.
  • heat conduction silica gel As a result, there is no gap between the first heat conduction plate and the second heat conduction plate, and heat can be quickly conducted through the heat conduction silica gel, further improving heat exchange efficiency.
  • the two heat conduction plates are directly attached, there will be no gaps on the surface, but in fact there will be local small gaps, resulting in the thermal conductivity of the composite board being inferior to that of the single board
  • spiral plate heat exchanger is an oil-water cooler for transformers. Used in transformers, it can improve the reliability and safety of transformer operation.
  • the primary medium flow channel and the secondary medium flow channel are arranged in a fully countercurrent manner.
  • the primary medium and secondary medium flow in the form of full countercurrent, and the heat exchange effect is better.
  • the liquid leakage alarm is a liquid level alarm.
  • the liquid leakage alarm adopts a liquid level alarm, which has guaranteed reliability and is easy to implement.
  • a water sensitive element is provided in the liquid leakage alarm, and the water sensitive element is connected with the controller. Adding a water sensor to the liquid level alarm can detect water leakage faster than the liquid level alarm when water leaks. It is a good supplement to the liquid level alarm and further improves reliability and safety. .
  • Fig. 1 is a schematic diagram of the structure of the main part of the spiral plate heat exchanger with leakage alarm function according to the embodiment of the present invention (the shell and the medium outlet on the side are not shown in the figure);
  • Fig. 2 is the front view of structure among Fig. 1;
  • Fig. 3 is the right side view of Fig. 2 view
  • Fig. 4 is the sectional view of A-A plane place among Fig. 3;
  • Fig. 5 is a partial enlarged view of place B in Fig. 4;
  • Fig. 6 is a schematic structural view of the first heat conduction plate in the embodiment (that is, the first heat conduction plate after rolling);
  • Fig. 7 is a schematic view of the structure of the first heat conducting plate before rolling in the embodiment.
  • FIG. 8 is a top view of the view of FIG. 2 .
  • the marks in the drawings are: 1-spiral plate; 101-first heat conducting plate; 102-second heat conducting plate; 103-chute; 104-transverse groove; 2-first-level medium inlet; 4-Drain tube; 5-Leakage alarm; 6-Secondary medium inlet.
  • the spiral plate heat exchanger with leakage alarm function is a spiral plate oil-water cooler for transformers, which includes a heat exchange body as in the prior art; Plate 1, two spiral plates 1 are arranged in parallel to form a primary medium flow channel and a secondary medium flow channel; both the primary medium flow channel and the secondary medium flow channel are provided with fixed positioning for the spiral plate 1 Distance column; different from the prior art: the spiral plate 1 is a composite plate, which is composed of a first heat conduction plate 101 and a second heat conduction plate 102 bonded to the first heat conduction plate 101; the first heat conduction plate 101 and the second heat conduction plate 102 are provided with a leakage drainage channel; the distance column is arranged along the distribution path of the leakage drainage channel, so that the connection between the spiral plate 1 and the distance column When there is a leak at the leaking liquid, the leaking liquid will enter the leaking liquid drainage channel and flow down along the leaking liquid drainage channel; the lower end of the heat exchange body is provided with a leaking liquid collecting plate 3, which is used
  • the spiral plate 1 forming the heat exchange body is a composite plate, and the composite plate consists of a first heat conduction plate 101 and a second heat conduction plate bonded to the first heat conduction plate 101 102, the bonding surface is provided with a leakage drainage channel, and the distance column is arranged along the distribution path of the leakage drainage channel, and a leakage collection plate 3 is provided at the lower end of the heat exchange body, and the leakage collection plate 3 passes through the guide
  • the flow tube 4 is connected to the leakage alarm 5.
  • drainage grooves are processed on the first heat conduction plate 101 , so that the first heat conduction plate 101 and the second heat conduction plate 102 are bonded together to form the leakage drainage channel.
  • the leakage liquid drainage channel is obtained by processing the drainage groove on the heat conduction plate, and the structure is reliable and easy to implement.
  • the drainage grooves include inclined grooves 103 arranged in groups, and the inclined grooves 103 extend from the top to the bottom of the bonding surface.
  • the leakage liquid can flow down along the chute 103 .
  • the drainage groove further includes a horizontal groove, and the horizontal groove communicates each inclined groove with each other.
  • the chutes are connected to each other by setting the horizontal grooves. When liquid leakage occurs at the upper part of the horizontal grooves, the leaked liquid flows down the horizontal grooves to the horizontal grooves, and then can be diverted to other chutes through the horizontal grooves to speed up the downward leakage. The flow speed enables the alarm to be triggered faster.
  • the number of the transverse grooves 104 is three, which are respectively provided at the upper part, the middle part and the lower part of the bonding surface. Therefore, when liquid leakage occurs at different height positions, the flow can be shunted through the horizontal groove 104 in time.
  • the chute 103 is connected to each other by setting the chute 104. When a liquid leak occurs at the upper part of the chute 104, the leaked liquid flows down to the chute 104 along the chute 103, and then can be diverted to other channels through the chute 104. The chute 103 speeds up the downward flow rate of the leaked liquid, so that the leaked liquid alarm 5 can be triggered to give an alarm faster.
  • the thickness of the first heat conduction plate 101 is greater than that of the second heat conduction plate 102 , and the drainage groove is provided on the first heat conduction plate 101 .
  • the drainage grooves are concentrated on the first heat conduction plate 101, which is beneficial to improve the processing efficiency and reduce the cost.
  • the thickness of the first heat conduction plate 101 is larger than that of the second heat conduction plate 102, so that after the first heat conduction plate 101 is grooved, the grooved part still has High strength, long service life.
  • the first heat conduction plate 101 is a steel plate with a thickness of 2.5 mm
  • the second heat conduction plate is a steel plate with a thickness of 1.5 mm
  • the drainage groove is a pressure groove with a depth of 0.5mm.
  • the first heat conduction plates 101 of the two spiral plates 1 are opposite to form the secondary medium flow channel for the circulation of the secondary medium (water), and the thinner second heat conduction plates 102 are divided into one level
  • the medium flow channel is used for transformer oil circulation (see Figure 8); once water (secondary medium) enters the transformer oil-water cooler, it is likely to cause major losses and safety accidents.
  • the circulation between the heat conduction plates 101 is less likely to leak than the second heat conduction plate 102 due to the thicker thickness and high strength of the first heat conduction plate 101 .
  • the first heat conduction plate 101 and the second heat conduction plate 102 are adhered by heat conduction silica gel.
  • heat conduction silica gel there is no gap between the first heat conducting plate 101 and the second heat conducting plate 102 , and heat can be quickly conducted through the heat conducting silica gel, further improving the heat exchange efficiency.
  • the primary medium flow channel and the secondary medium flow channel are arranged in the form of full counterflow (transformer oil enters from the primary medium inlet 2 on the top of the heat exchange body, and the primary medium flow channel After flowing in a spiral path, it flows out from the oil outlet on the side of the cooler; the cooling water enters from the secondary medium inlet 6 at the bottom of the heat exchange body, flows in the secondary medium flow channel according to the spiral flow channel, and flows out from the side of the cooler out of the water outlet at the bottom).
  • the primary medium and secondary medium flow in the form of full countercurrent, and the heat exchange effect is better.
  • the liquid leakage alarm 5 is a liquid level alarm.
  • the liquid leakage alarm 5 adopts a liquid level alarm, which has guaranteed reliability and is easy to implement.
  • the liquid leakage alarm 5 is provided with a water sensitive element, and the water sensitive element is connected with the controller. Adding a water sensor to the liquid level alarm can detect water leakage more quickly when water leaks, which is a good supplement to the liquid level alarm.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

带泄漏报警功能的螺旋板式换热器，包括换热体；所述换热体包括两张卷制成螺旋状的螺旋板，两张螺旋板平行设置形成一级介质流道和二级介质流道；所述一级介质流道和所述二级介质流道中均设有用于对螺旋板进行定位的定距柱；所述螺旋板为复合板，其由第一导热板以及与第一导热板贴合的第二导热板构成；所述第一导热板与所述第二导热板的贴合面上设有漏液引流通道；所述定距柱沿着所述漏液引流通道的分布路径设置；所述换热体的下端设有漏液收集盘；所述漏液收集盘通过导流管与渗漏报警器连接。本发明通过漏液引流通道将漏液导入报警器中触发报警，避免因漏液造成的损失和安全事故的发生，同时热传导速度快，换热效果好。

Description

带泄漏报警功能的螺旋板式换热器 技术领域
本发明涉及螺旋板式换热器，具体涉及一种带泄露报警功能的螺旋板式换热器，其能在发生漏液时，及时报警。
 背景技术
螺旋板式换热器的换热体由两张导热板（常为钢板）卷制而成，两张导热板卷制后即形成了两张螺旋板，两张螺旋板平行设置形成两个螺旋通道，两种传热介质可进行全逆流流动，换热效果好，即使两种小温差介质，也能达到理想的换热效果。为了对换热体的两张螺旋板进行定位，两个螺旋通道中均设有一定数量的定距柱。现有技术中，定距柱通常焊接于螺旋板上，然而在设备运行过程中，由于受水分冲刷和微量化学介质的腐蚀等作用，焊缝处经常出现渗漏，特别是应用于变压器中的螺旋板式油水冷却器，当水沿着裂缝或孔洞进入油通道，导致水和油出现混合，将对变压器造成极大的损伤，甚至可能导致重大事故，存在安全隐患。因此，亟需研发具有漏液报警功能的螺旋板式换热器，以达到在螺旋板与定距柱连接处出现渗漏时，能够及时报警的目的。
 技术问题
本发明的目的在于提供一种带泄漏报警功能的螺旋板式换热器。本发明的带泄漏报警功能的螺旋板式换热器能在螺旋板与定距柱的连接处出现渗漏时，将漏液快速引至漏液报警器中，触发警报，避免造成损失和发生事故。
 技术解决方案
带泄漏报警功能的螺旋板式换热器，包括换热体；所述换热体包括两张卷制成螺旋状的螺旋板，两张螺旋板平行设置形成一级介质流道和二级介质流道；所述一级介质流道和所述二级介质流道中均设有用于对螺旋板进行定位的定距柱；所述螺旋板为复合板，其由第一导热板以及与第一导热板贴合的第二导热板构成；所述第一导热板与所述第二导热板的贴合面上设有漏液引流通道；所述定距柱沿着所述漏液引流通道的分布路径设置，从而在螺旋板与定距柱的连接处出现渗漏时，漏液会进入漏液引流通道中，顺着漏液引流通道向下流；所述换热体的下端设有漏液收集盘，用于收集从漏液引流通道下端流出的漏液；所述漏液收集盘通过导流管与渗漏报警器连接，出现渗漏后，漏液收集盘收集到的漏液经导流管流入漏液报警器中触发报警。
 有益效果
与现有技术相比，本发明上述技术方案的带泄漏报警功能的螺旋板式换热器中，形成换热体的螺旋板为复合板，复合板由第一导热板以及与第一导热板贴合的第二导热板构成，贴合面上设有漏液引流通道，且定距柱沿漏液引流通道的分布路径设置，并在换热体的下端设有漏液收集盘，漏液收集盘通过导流管与渗漏报警器连接，工作过程中，在螺旋板与定距柱的连接处出现渗漏时，漏液会进入漏液引流通道中，顺着漏液引流通道向下流，最终流入漏液报警器中触发报警，避免因漏液造成的损失和安全事故的发生，且第一导热板与第二导热板呈贴合状态，热传导速度快，换热效果好。
进一步，所述第一导热板和/或第二导热板上加工有引流槽，使第一导热板和第二导热板贴合后形成所述漏液引流通道。通过在导热板上加工引流槽获得漏液引流通道，结构可靠，且易于实施。
进一步，所述引流槽包括成组设置的斜槽，所述斜槽从所述贴合面的顶部延伸至底部。由此，漏液可以沿斜槽向下流。
进一步，所述引流槽还包括至少一条横槽，所述横槽使各斜槽相互连通。通过设置横槽将各斜槽相互连通，在横槽上方部位出现漏液时，漏液顺着斜槽向下流至横槽中后，可以经横槽分流至其它斜槽，加快漏液向下流动速度，使报警器能更快的被触发报警。
进一步，所述横槽的数量可以为3条，分别设于所述贴合面的上部、中部和下部。由此，不同高度位置发生漏液时，都能及时通过横槽分流。
进一步，所述螺旋板中，第一导热板的厚度较第二导热板的厚度大，所述引流槽设于第一导热板上。引流槽集中设于第一导热板上有利于提高加工效率，降低成本，第一导热板的厚度较第二导热板大，保证第一导热板开槽后，开槽部位仍具有较高强度，使用寿命长。
进一步，所述第一导热板的厚度可以占螺旋板的厚度的60-70%。
进一步，两张螺旋板的第一导热板呈相对状，形成所述一级介质流道或二级介质流道。此时，较厚的第一导热板隔成一个介质流道，较薄的第二导热板隔成另一个介质流道，使用时，让危险系数高的介质在较厚的第一导热板隔成介质流道中流通，安全性更好。例如，变压器中用的油水冷却器，水（二级介质）一旦进入到变压器中，很可能造成重大损失和安全事故，让水在两张第一导热板之间流通，由于第一导热板厚度大，强度高，较第二导热板更不容易发生渗漏。
进一步，所述第一导热板和第二导热板通过导热硅胶贴合。由此，第一导热板和第二导热板之间完全没有空隙，热量通过导热硅胶可以快速的传导，进一步提高了热交换效率。（如果两张导热板直接贴合，表面上看没有空隙，实际上会有局部微小空隙，导致复合板的导热效果不及单板）
进一步，所述螺旋板式换热器为变压器用油水冷却器。在变压器中使用，可以提高变压器运行的可靠性和安全性。
进一步，所述一级介质流道和所述二级介质流道呈全逆流形式设置。一级介质和二级介质按照全逆流形式流动，换热效果更好。
进一步，所述漏液报警器为液位报警器。漏液报警器采用液位报警器，可靠性有保障，且易于实施。
进一步，所述漏液报警器中设有水敏元件，所述水敏元件与控制器相连。在液位报警器中增加设置水敏元件，可以在漏水时，相比液位报警能更快速的检测到漏水，是对液位报警的一种很好的补充，进一步提高可靠性和安全性。
 附图说明
图1是本发明实施例的带泄漏报警功能的螺旋板式换热器主体部分结构示意图（图中未画出壳体，以及设于侧部的介质出口）；
图2是图1中结构的主视图；
图3是图2视图的右视图；
图4是图3中A-A面处的剖视图；
图5是图4 中B处的局部放大图；
图6是实施例中第一导热板的结构示意图（即卷制成型后的第一导热板）；
图7是实施例中第一导热板卷制前的结构示意图；
图8是图2视图的俯视图。
附图中的标记为：1-螺旋板；101-第一导热板；102-第二导热板；103-斜槽；104-横槽；2-一级介质入口；3-漏液收集盘；4-导流管；5-漏液报警器；6-二级介质入口。
 本发明的实施方式
下面结合附图和实施例对本发明作进一步的说明，但并不作为对本发明限制的依据。以下实施例中，未详细说明的均为本领域常规技术手段或技术常识。
实施例（参见图1至图8）：
本实施例中，带泄漏报警功能的螺旋板式换热器为变压器用螺旋板式油水冷却器，同现有技术，其包括换热体；所述换热体包括两张卷制成螺旋状的螺旋板1，两张螺旋板1平行设置形成一级介质流道和二级介质流道；所述一级介质流道和所述二级介质流道中均设有用于对螺旋板1进行定位的定距柱；与现有技术不同的是：所述螺旋板1为复合板，其由第一导热板101以及与第一导热板101贴合的第二导热板102构成；所述第一导热板101与所述第二导热板102的贴合面上设有漏液引流通道；所述定距柱沿着所述漏液引流通道的分布路径设置，从而在螺旋板1与定距柱的连接处出现渗漏时，漏液会进入漏液引流通道中，顺着漏液引流通道向下流；所述换热体的下端设有漏液收集盘3，用于收集从漏液引流通道下端流出的漏液；所述漏液收集盘3通过导流管4与渗漏报警器5连接，出现渗漏后，漏液收集盘3收集到的漏液经导流管4流入漏液报警器5中触发报警。
本申请中的带泄漏报警功能的螺旋板式换热器中，形成换热体的螺旋板1为复合板，复合板由第一导热板101以及与第一导热板101贴合的第二导热板102构成，贴合面上设有漏液引流通道，且定距柱沿漏液引流通道的分布路径设置，并在换热体的下端设有漏液收集盘3，漏液收集盘3通过导流管4与渗漏报警器5连接，工作过程中，在螺旋板1与定距柱的连接处出现渗漏时，漏液会进入漏液引流通道中，顺着漏液引流通道向下流，最终流入漏液报警器5中触发报警，避免因漏液造成的损失和安全事故的发生，且第一导热板101与第二导热板102呈贴合状态，热量可以直接在相互贴合的导热板间传递，热传导速度快，换热效果好。
在本实施例中，所述第一导热板101上加工有引流槽，使第一导热板101和第二导热板102贴合后形成所述漏液引流通道。通过在导热板上加工引流槽获得漏液引流通道，结构可靠，且易于实施。
在本实施例中，所述引流槽包括成组设置的斜槽103，所述斜槽103从所述贴合面的顶部延伸至底部。由此，漏液可以沿斜槽103向下流。
在本实施例中，所述引流槽还包括横槽，所述横槽使各斜槽相互连通。通过设置横槽将各斜槽相互连通，在横槽上方部位出现漏液时，漏液顺着斜槽向下流至横槽中后，可以经横槽分流至其它斜槽，加快漏液向下流动速度，使报警器能更快的被触发报警。
在本实施例中，所述横槽104的数量为3条，分别设于所述贴合面的上部、中部和下部。由此，不同高度位置发生漏液时，都能及时通过横槽104分流。进一步，通过设置横槽104将各斜槽103相互连通，在横槽104上方部位出现漏液时，漏液顺着斜槽103向下流至横槽104中后，可以经横槽104分流至其它斜槽103，加快漏液向下流动速度，使漏液报警器5能更快的被触发报警。
在本实施例中，所述螺旋板1中，第一导热板101的厚度较第二导热板102的厚度大，所述引流槽设于第一导热板101上。引流槽集中设于第一导热板101上有利于提高加工效率，降低成本，第一导热板101的厚度较第二导热板102大，保证第一导热板101开槽后，开槽部位仍具有较高强度，使用寿命长。
在本实施例中，所述第一导热板101为2.5mm厚的钢板，第二导热板为1.5mm厚的钢板。引流槽为0.5mm深的压槽。
在本实施例中，两张螺旋板1的第一导热板101呈相对状，形成所述二级介质流道，供二级介质（水）流通，较薄的第二导热板102隔成一级介质流道，供变压器油流通（参见图8）；变压器中用的油水冷却器，水（二级介质）一旦进入到变压器中，很可能造成重大损失和安全事故，让水在两张第一导热板101之间流通，由于第一导热板101厚度大，强度高，较第二导热板102更不容易发生渗漏。
在本实施例中，所述第一导热板101和第二导热板102通过导热硅胶贴合。由此，第一导热板101和第二导热板102之间完全没有空隙，热量通过导热硅胶可以快速的传导，进一步提高了热交换效率。
在本实施例中，所述一级介质流道和所述二级介质流道呈全逆流形式设置（变压器油从设于换热体顶部的一级介质入口2进入，在一级介质流道中按螺旋路径流动后从设于冷却器侧部的油出口流出；冷却水从换热体底部的二级介质入口6进入，在二级介质流道中按螺旋流道流动后从设于冷却器侧部的水出口流出）。一级介质和二级介质按照全逆流形式流动，换热效果更好。
在本实施例中，所述漏液报警器5为液位报警器。漏液报警器5采用液位报警器，可靠性有保障，且易于实施。
在本实施例中，所述漏液报警器5中设有水敏元件，所述水敏元件与控制器相连。在液位报警器中增加设置水敏元件，可以在漏水时，更快速的检测到漏水，是对液位报警的一种很好的补充。
上述对本申请中涉及的发明的一般性描述和对其具体实施方式的描述不应理解为是对该实用新型技术方案构成的限制。本领域所属技术人员根据本申请的公开，可以在不违背所涉及的实用新型构成要素的前提下，对上述一般性描述或/和具体实施方式（包括实施例）中的公开技术特征进行增加、减少或组合，形成属于本申请保护范围之内的其它的技术方案。

Claims (13)

  1. 带泄漏报警功能的螺旋板式换热器，包括换热体；所述换热体包括两张卷制成螺旋状的螺旋板（1），两张螺旋板（1）平行设置形成一级介质流道和二级介质流道；所述一级介质流道和所述二级介质流道中均设有用于对螺旋板（1）进行定位的定距柱；其特征在于：所述螺旋板（1）为复合板，其由第一导热板（101）以及与第一导热板（101）贴合的第二导热板（102）构成；所述第一导热板（101）与所述第二导热板（102）的贴合面上设有漏液引流通道；所述定距柱沿着所述漏液引流通道的分布路径设置，从而在螺旋板（1）与定距柱的连接处出现渗漏时，漏液会进入漏液引流通道中，顺着漏液引流通道向下流；所述换热体的下端设有漏液收集盘（3），用于收集从漏液引流通道下端流出的漏液；所述漏液收集盘（3）通过导流管（4）与渗漏报警器（5）连接，出现渗漏后，漏液收集盘（3）收集到的漏液经导流管（4）流入漏液报警器（5）中触发报警。
  2. 根据权利要求1所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述第一导热板（101）和/或第二导热板（102）上加工有引流槽，使第一导热板（101）和第二导热板（102）贴合后形成所述漏液引流通道。
  3. 根据权利要求2所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述引流槽包括成组设置的斜槽（103），所述斜槽（103）从所述贴合面的顶部延伸至底部。
  4. 根据权利要求3所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述引流槽还包括至少一条横槽（104），所述横槽（104）使各斜槽（103）相互连通。
  5. 根据权利要求4所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述横槽（104）的数量为3条，分别设于所述贴合面的上部、中部和下部。
  6. 根据权利要求2所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述螺旋板（1）中，第一导热板（101）的厚度较第二导热板（102）的厚度大，所述引流槽设于第一导热板（101）上。
  7. 根据权利要求6所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述第一导热板（101）的厚度占螺旋板（1）的厚度的60-70%。
  8. 根据权利要求6所述的带泄漏报警功能的螺旋板式换热器，其特征在于：两张螺旋板（1）的第一导热板（101）呈相对状，形成所述一级介质流道或二级介质流道。
  9. 根据权利要求1所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述第一导热板（101）和第二导热板（102）通过导热硅胶贴合。
  10. 根据权利要求1所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述螺旋板式换热器为变压器用油水冷却器。
  11. 根据权利要求10所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述一级介质流道和所述二级介质流道呈全逆流形式设置。
  12. 根据权利要求10所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述漏液报警器为液位报警器。
  13. 根据权利要求12所述的带泄漏报警功能的螺旋板式换热器，其特征在于：所述漏液报警器中设有水敏元件，所述水敏元件与控制器相连。
PCT/CN2022/085429 2021-11-01 2022-04-07 带泄漏报警功能的螺旋板式换热器 WO2023071057A1 (zh)

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DE3903084A1 (de) * 1989-02-02 1990-08-09 Bergfeld & Heider Gmbh & Co Kg Plattenwaermeaustauscher
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