Heat tracing pipe with joint structure
By installing a joint structure with inner and outer steel wire layers that are electrically heated inside the pipe, the problem of decreased pipe flow performance in low-temperature environments is solved, achieving effective temperature maintenance and improved flow performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU SHENSHI PIPELINE SHARES CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-23
AI Technical Summary
In low-temperature environments, the medium inside the pipeline is easily affected by the external temperature, resulting in condensation, crystallization, and increased viscosity, which leads to a decrease in pipeline flow performance and affects transportation efficiency.
The heat tracing pipe with a joint structure is used. The inner and outer steel wire layers are electrically heated, and combined with the conductive layer and protective layer, the required temperature of the medium inside the pipe is maintained, reducing the decrease in flow performance caused by low temperature.
By energizing the inner and outer steel wire layers, heat is transferred to the inside of the tube, maintaining the temperature of the medium inside the tube, improving flow performance, and preventing performance degradation caused by low temperature.
Smart Images
Figure CN224397431U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat tracing pipe technology, and in particular to a heat tracing pipe with a joint structure. Background Technology
[0002] Pipelines are devices used to transport various media such as liquids and gases, playing a vital role in the stable operation of industrial production and daily life. In low-temperature environments, the media inside pipelines are susceptible to condensation, crystallization, and increased viscosity due to external temperature influences, leading to a decrease in pipeline flow performance and affecting the efficiency of media transport within the pipeline. Utility Model Content
[0003] To reduce the decline in pipeline flow performance caused by low temperatures, this application provides a heat tracing pipeline with a joint structure.
[0004] The heat tracing pipe with a joint structure provided in this application adopts the following technical solution:
[0005] A heat tracing pipe with a joint structure includes a pipe body, a joint inner core inserted inside the pipe body, the joint inner core being sealed to the pipe body, one end of the joint inner core being located outside the pipe body, an inner steel wire layer being provided on the outer ring wall of the pipe body, an inner conductive layer and an isolation layer being provided on the outer ring wall of the inner steel wire layer, an outer steel wire layer being provided on the outer ring wall of the isolation layer, and an outer conductive layer and a protective layer being provided on the outer ring wall of the outer steel wire layer. A joint sleeve is fitted together on the pipe body, the inner conductive layer, the isolation layer, the outer conductive layer, and the protective layer, and the joint inner core and the protective layer are both sealed to the joint sleeve. A set of guide holes are opened through the joint sleeve, and power lines are inserted into the guide holes, one of which is connected to the inner conductive layer, and the other is connected to the outer conductive layer.
[0006] By adopting the above technical solution, the inner and outer steel wire layers generate heat after being energized. The isolation layer serves as an insulating layer, the inner conductive layer electrically connects one power line to the inner steel wire layer, and the outer conductive layer electrically connects the other power line to the outer steel wire layer. The protective layer provides protection for the pipe body, inner steel wire layer, inner conductive layer, isolation layer, outer steel wire layer, and outer conductive layer. After the power lines are energized, the current flows through the inner conductive layer and then through the inner steel wire layer, and through the outer conductive layer and then through the outer steel wire layer, causing the inner and outer steel wire layers to generate heat and transfer heat to the inside of the pipe body. This maintains the required temperature of the medium inside the pipe body and reduces the possibility of decreased pipe flow performance due to low temperatures.
[0007] Preferably, the connector sleeve includes an outer sleeve, a middle sleeve, and an inner sleeve. The outer sleeve is fitted onto the inner core of the connector and is sealed to the inner core. The inner sleeve is fitted onto the protective layer and is sealed to the protective layer. The middle sleeve is located between the outer sleeve and the inner sleeve. One end of the middle sleeve is integrally formed with the outer sleeve, and the other end is integrally formed with the inner sleeve. The inner core, tube body, inner steel wire layer, inner conductive layer, isolation layer, outer steel wire layer, outer conductive layer, and protective layer are all inserted into the middle sleeve. The guide hole is formed through the middle sleeve. A foam layer is provided between the inner wall of the guide hole and the outer wall of the power cord. Both the inner wall of the guide hole and the outer wall of the power cord are tightly bonded to the foam layer.
[0008] By adopting the above technical solution, the foam layer seals the guide hole and the power line.
[0009] Preferably, the inner ring wall of the outer sleeve is provided with an outer sealing layer, which abuts against the outer ring wall of the inner core of the joint and the inner ring wall of the outer sleeve.
[0010] By adopting the above technical solution, the outer sealing layer seals the inner core of the joint with the outer sleeve.
[0011] Preferably, the inner ring wall of the inner sleeve is provided with an inner sealing layer, which abuts against the outer ring wall of the protective layer and the inner ring wall of the inner sleeve.
[0012] By adopting the above technical solution, the inner sealing layer seals the protective layer and the inner sleeve.
[0013] Preferably, the inner conductive layer includes an inner conductive sheet and an inner clamp. The inner clamp is sleeved on the inner steel wire layer, and the inner conductive sheet is located between the inner clamp and the inner steel wire layer. The opposing surfaces of the inner clamp and the inner steel wire layer abut against the inner conductive sheet. One side of the inner conductive sheet is connected to the inner steel wire layer, and the other side of the inner conductive sheet is connected to the power line. The end wall of the inner clamp away from the outer sleeve is in contact with the end wall of the isolation layer facing the outer sleeve.
[0014] By adopting the above technical solution, the inner clamp presses the inner conductive sheet onto the inner steel wire layer, so that the power line and the inner steel wire layer are electrically connected.
[0015] Preferably, an inner rubber layer is fitted on both the inner clamp and the isolation layer. The outer ring wall of the inner clamp and the outer ring wall of the isolation layer abut against the inner ring wall of the inner rubber layer. An inner shrink tube is fitted on the inner rubber layer. The outer ring wall of the inner rubber layer abuts against the inner ring wall of the inner shrink tube. The outer ring wall of the inner shrink tube is flush with the outer ring wall of the outer steel wire layer. The end wall of the inner shrink tube away from the outer sleeve and the opposite end wall of the outer steel wire layer facing the outer sleeve are in contact with each other.
[0016] By adopting the above technical solution, the inner adhesive layer and the inner shrink tube cover the inner conductive sheet and the inner clamp, achieving the effect of insulation and isolation.
[0017] Preferably, the outer conductive layer includes an outer conductive sheet and an outer clamp. The outer clamp is sleeved on the outer steel wire layer, and the outer conductive sheet is located between the outer clamp and the outer steel wire layer. The opposing surfaces of the outer clamp and the outer steel wire layer abut against the outer conductive sheet. One side of the outer conductive sheet is connected to the outer steel wire layer, and the other side of the outer conductive sheet is connected to the power line. The end wall of the outer clamp away from the outer sleeve is in contact with the opposing surface of the end wall of the protective layer facing the outer sleeve.
[0018] By adopting the above technical solution, the outer clamp presses the outer conductive sheet onto the outer steel wire layer, so that the power line and the outer steel wire layer are electrically connected.
[0019] Preferably, an outer rubber layer is fitted onto the outer clamp, the outer ring wall of the outer clamp abuts against the inner ring wall of the outer rubber layer, an outer shrink tube is fitted onto the outer rubber layer, the outer ring wall of the outer rubber layer abuts against the inner ring wall of the outer shrink tube, and the end wall of the outer shrink tube away from the outer sleeve and the opposite side of the end wall of the protective layer facing the outer sleeve are in contact with each other.
[0020] By adopting the above technical solution, the outer adhesive layer and the outer shrink tube cover the outer conductive sheet and the outer clamp, achieving the effect of insulation and isolation.
[0021] In summary, this application includes at least one of the following beneficial technical effects:
[0022] 1. By setting up a pipe body, a joint inner core, an inner steel wire layer, an inner conductive layer, an isolation layer, an outer steel wire layer, an outer conductive layer, a protective layer, a joint sleeve, a guide hole, and a power line, the inner and outer steel wire layers generate heat when energized, transferring heat to the inside of the pipe body to maintain the required temperature of the medium inside the pipe body and reduce the situation where low temperature causes a decrease in the flow performance of the pipeline;
[0023] 2. By setting inner conductive sheets and inner clamps, a conductive connection is made between the power cord and the inner steel wire layer;
[0024] 3. By setting external conductive plates and external clamps, a conductive connection is made between the power cord and the outer steel wire layer. Attached Figure Description
[0025] Figure 1 This is a cross-sectional view of a heat tracing pipe with a joint structure according to an embodiment of this application.
[0026] Figure 2 yes Figure 1 Enlarged view of section A.
[0027] Figure 3 yes Figure 1 Enlarged view of section B.
[0028] Figure 4 yes Figure 1 Enlarged view of section C.
[0029] Figure 5 This is a schematic diagram of a heat tracing pipe structure with a joint structure in an embodiment of this application.
[0030] Figure 6 This is a schematic diagram illustrating the positional relationship between the inner and outer steel wire layers in an embodiment of this application.
[0031] Figure 7 This is a schematic diagram illustrating the positional relationship between the inner and outer clamps in the embodiments of this application.
[0032] Figure 8 yes Figure 7 Enlarged view of section D.
[0033] Figure 9 yes Figure 7 Enlarged view of section E in the middle.
[0034] Figure 10 This is a schematic diagram illustrating the positional relationship between the inner and outer adhesive layers in the embodiments of this application.
[0035] Figure 11 This is a schematic diagram illustrating the positional relationship between the inner and outer retractors in an embodiment of this application.
[0036] Explanation of reference numerals in the attached drawings: 1. Pipe body; 2. Inner core of the connector; 3. Inner steel wire layer; 4. Inner conductive layer; 41. Inner conductive sheet; 42. Inner clamp; 43. Inner rubber layer; 44. Inner shrink tube; 5. Isolation layer; 6. Outer steel wire layer; 7. Outer conductive layer; 71. Outer conductive sheet; 72. Outer clamp; 73. Outer rubber layer; 74. Outer shrink tube; 8. Protective layer; 9. Connector sleeve; 91. Outer sleeve; 911. Outer sealing rubber layer; 92. Inner sleeve; 921. Inner sealing rubber layer; 93. Intermediate sleeve; 931. Guide hole; 932. Power cord; 933. Foam layer. Detailed Implementation
[0037] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.
[0038] This application discloses a heat tracing pipe with a joint structure. (Refer to...) Figures 1 to 5The system includes a tube body 1, with a connector core 2 inserted inside. One end of the connector core 2 is located outside the tube body 1, while the other end is tightly sealed inside the tube body 1, achieving a sealed connection between the connector core 2 and the tube body 1. The outer ring wall of the tube body 1 is wrapped with a mesh-like inner steel wire layer 3 formed by steel wire braiding, which heats up when energized. The outer ring wall of the inner steel wire layer 3 is fitted with an inner conductive layer 4 and a rubber insulating layer 5, covering the inner steel wire layer 3. The inner conductive layer 4 and the insulating layer 5 are electrically connected to the inner steel wire layer 3. The outer ring wall of the insulating layer 5 is wrapped with a mesh-like outer steel wire layer 6 formed by steel wire braiding, which heats up when energized. The outer ring wall of the outer steel wire layer 6 is fitted with an outer conductive layer 7 and a nylon protective layer 8, covering the outer steel wire layer 6. The outer conductive layer 7 and the protective layer 8 are electrically connected to the outer steel wire layer 6. The insulating layer 5 forms insulation between the inner steel wire layer 3 and the outer steel wire layer 6, while the protective layer 8 forms external insulation. Simultaneously, the protective layer 8 protects the pipe body 1, the inner steel wire layer 3, the inner conductive layer 4, the insulating layer 5, the outer steel wire layer 6, and the outer conductive layer 7. A connector sleeve 9 is fitted onto the pipe body 1, the inner conductive layer 4, the insulating layer 5, the outer conductive layer 7, and the protective layer 8. The connector core 2 and the protective layer 8 are both sealed to the connector sleeve 9. A set of guide holes 931 are formed through the connector sleeve 9, and power lines 932 are inserted into the guide holes 931. One power line 932 is electrically connected to the inner conductive layer 4, and the inner conductive layer 4 is electrically connected to the inner steel wire layer 3; the other power line 932 is electrically connected to the outer conductive layer 7, and the outer conductive layer 7 is electrically connected to the outer steel wire layer 6. After the power cord 932 is powered on, the current flows through the inner conductive layer 4 and the inner steel wire layer 3, and the current flows through the outer conductive layer 7 and the outer steel wire layer 6, causing the inner steel wire layer 3 and the outer steel wire layer 6 to be powered and heated, transferring heat to the inside of the pipe body 1, maintaining the temperature required by the medium inside the pipe body 1, and reducing the situation where the flow performance of the pipeline is reduced due to low temperature.
[0039] For a sealed connection between the connector sleeve 9, the connector inner core 2, and the pipe body 1, refer to... Figures 1 to 5The connector sleeve 9 includes an outer sleeve 91, a middle sleeve 93, and an inner sleeve 92. The outer sleeve 91 is fitted onto the inner core 2 of the connector, and sealant is filled between the inner ring wall of the outer sleeve 91 and the outer ring wall of the inner core 2 to form an outer sealant layer 911. The outer sealant layer 911 abuts against the outer ring wall of the inner core 2 and the inner ring wall of the outer sleeve 91, and both the outer ring wall of the inner core 2 and the inner ring wall of the outer sleeve 91 are in close contact with the outer sealant layer 911, thus sealing the inner core 2 and the outer sleeve 91. The inner sleeve 92 is fitted onto the protective layer 8, and sealant is filled between the inner ring wall of the inner sleeve 92 and the outer ring wall of the protective layer 8 to form an inner sealant layer 921. The inner sealing layer 921 abuts against the outer ring wall of the protective layer 8 and the inner ring wall of the inner sleeve 92, and both the outer ring wall of the protective layer 8 and the inner ring wall of the inner sleeve 92 are tightly fitted with the inner sealing layer 921, thus sealing the protective layer 8 and the inner sleeve 92. The intermediate sleeve 93 is located between the outer sleeve 91 and the inner sleeve 92. One end of the intermediate sleeve 93 is integrally formed with the outer sleeve 91, and the other end is integrally formed with the inner sleeve 92. The connector core 2, tube body 1, inner steel wire layer 3, inner conductive layer 4, isolation layer 5, outer steel wire layer 6, outer conductive layer 7, and protective layer 8 are all inserted into the intermediate sleeve 93, and a guide hole 931 is formed through the intermediate sleeve 93. Expanding foam is injected between the inner wall of the guide hole 931 and the outer wall of the power line 932, and after curing, the expanding foam layer 933 is formed. The inner wall of the guide hole 931 and the outer wall of the power cord 932 are both tightly bonded to the foam layer 933, so that the foam layer 933 seals the guide hole 931 and the power cord 932.
[0040] Reference Figures 1 to 9 The inner conductive layer 4 includes an inner conductive sheet 41 and an inner clamp 42. The inner clamp 42 is fitted onto the inner steel wire layer 3, and the inner conductive sheet 41 is located between the inner clamp 42 and the inner steel wire layer 3. The opposing surfaces of the inner clamp 42 and the inner steel wire layer 3 abut against the inner conductive sheet 41, thereby pressing the inner conductive sheet 41 onto the inner steel wire layer 3. The outer conductive layer 7 includes an outer conductive sheet 71 and an outer clamp 72. The outer clamp 72 is fitted onto the outer steel wire layer 6, and the outer conductive sheet 71 is located between the outer clamp 72 and the outer steel wire layer 6. The opposing surfaces of the outer clamp 72 and the outer steel wire layer 6 abut against the outer conductive sheet 71, thereby pressing the outer conductive sheet 71 onto the outer steel wire layer 6. One side of the inner conductive sheet 41 is electrically connected to the inner steel wire layer 3, and the other side of the inner conductive sheet 41 is electrically connected to one of the power lines 932; one side of the outer conductive sheet 71 is electrically connected to the outer steel wire layer 6, and the other side of the outer conductive sheet 71 is electrically connected to another power line 932.
[0041] refer to Figure 1The end wall of the inner clamp 42 away from the outer sleeve 91 is in contact with the end wall of the insulating layer 5 facing the outer sleeve 91. Insulating tape is wrapped around the inner clamp 42 and the insulating layer 5 to form an inner rubber layer 43. The outer ring wall of the inner clamp 42 and the outer ring wall of the insulating layer 5 are both in contact with the inner ring wall of the inner rubber layer 43. An inner shrink tube 44 is fitted on the inner rubber layer 43. The inner shrink tube 44 gradually shrinks under temperature changes. After shrinking, the outer ring wall of the inner shrink tube 44 is flush with the outer ring wall of the outer steel wire layer 6, and the inner ring wall of the inner shrink tube 44 abuts against the outer ring wall of the inner rubber layer 43. The end wall of the inner shrink tube 44 away from the outer sleeve 91 is in contact with the opposite side of the end wall of the outer steel wire layer 6 facing the outer sleeve 91. The inner adhesive layer 43 and the inner shrink tube 44 cover the inner conductive sheet 41 and the inner clamp 42, and the inner clamp 42 and the outer steel wire layer 6 are insulated and isolated by the inner adhesive layer 43 and the inner shrink tube 44.
[0042] Reference Figures 1 to 11 The outer clamp 72, at the end away from the outer sleeve 91, is in contact with the opposite end wall of the protective layer 8 facing the outer sleeve 91. Insulating tape is wrapped around the outer clamp 72 to form an outer adhesive layer 73, with the outer ring wall of the outer clamp 72 abutting against the inner ring wall of the outer adhesive layer 73. An outer shrink tube 74 is fitted onto the outer adhesive layer 73, which gradually shrinks under temperature changes. The inner ring wall of the shrunken outer shrink tube 74 abuts against the outer ring wall of the outer adhesive layer 73, and the end wall of the shrunken outer shrink tube 74, at the end away from the outer sleeve 91, is in contact with the opposite end wall of the protective layer 8 facing the outer sleeve 91. The outer adhesive layer 73 and the outer shrink tube 74 cover the outer conductive sheet 71 and the outer clamp 72, and the outer steel wire layer 6 achieves insulation and isolation through the outer adhesive layer 73, the outer shrink tube 74, and the protective layer 8.
[0043] The implementation principle of a heat tracing pipe with a joint structure according to an embodiment of this application is as follows: After the power cord 932 is energized, the current flows through the inner conductive layer 4 and the inner steel wire layer 3, and the current flows through the outer conductive layer 7 and the outer steel wire layer 6. The inner steel wire layer 3 and the outer steel wire layer 6 generate heat when energized, transferring heat to the inside of the pipe body 1, maintaining the required temperature of the medium inside the pipe body 1, and reducing the possibility of decreased pipe flow performance due to low temperature.
[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A heat tracing pipe with a joint structure, comprising a pipe body, wherein a joint inner core is inserted into the pipe body, the joint inner core is sealed to the pipe body, and one end of the joint inner core is located outside the pipe body, characterized in that: The outer ring wall of the tube is provided with an inner steel wire layer, the outer ring wall of the inner steel wire layer is provided with an inner conductive layer and an isolation layer, the outer ring wall of the isolation layer is provided with an outer steel wire layer, and the outer ring wall of the outer steel wire layer is provided with an outer conductive layer and a protective layer. A joint sleeve is fitted on the tube, the inner conductive layer, the isolation layer, the outer conductive layer and the protective layer. The inner core of the joint and the protective layer are sealed to the joint sleeve. A set of guide holes are opened through the joint sleeve. A power wire is inserted into the guide hole, one of which is connected to the inner conductive layer and the other is connected to the outer conductive layer.
2. A heat tracing pipe with a joint structure according to claim 1, characterized in that: The connector sleeve includes an outer sleeve, a middle sleeve, and an inner sleeve. The outer sleeve is fitted onto the inner core of the connector and is sealed to the inner core. The inner sleeve is fitted onto the protective layer and is sealed to the protective layer. The middle sleeve is located between the outer sleeve and the inner sleeve. One end of the middle sleeve is integrally formed with the outer sleeve, and the other end is integrally formed with the inner sleeve. The inner core, tube body, inner steel wire layer, inner conductive layer, isolation layer, outer steel wire layer, outer conductive layer, and protective layer are all inserted into the middle sleeve. The guide hole is formed through the middle sleeve. A foam layer is provided between the inner wall of the guide hole and the outer wall of the power cord. Both the inner wall of the guide hole and the outer wall of the power cord are tightly bonded to the foam layer.
3. A heat tracing pipe with a joint structure according to claim 2, characterized in that: The inner ring wall of the outer sleeve is provided with an outer sealing layer, which abuts between the outer ring wall of the inner core of the joint and the inner ring wall of the outer sleeve.
4. A heat tracing pipe with a joint structure according to claim 2, characterized in that: The inner ring wall of the inner sleeve is provided with an inner sealing layer, which abuts against the outer ring wall of the protective layer and the inner ring wall of the inner sleeve.
5. A heat tracing pipe with a joint structure according to claim 2, characterized in that: The inner conductive layer includes an inner conductive sheet and an inner clamp. The inner clamp is sleeved on the inner steel wire layer. The inner conductive sheet is located between the inner clamp and the inner steel wire layer. The opposing surfaces of the inner clamp and the inner steel wire layer abut against the inner conductive sheet. One side of the inner conductive sheet is connected to the inner steel wire layer, and the other side of the inner conductive sheet is connected to the power line. The end wall of the inner clamp away from the outer sleeve is in contact with the end wall of the isolation layer facing the outer sleeve.
6. A heat tracing pipe with a joint structure according to claim 5, characterized in that: An inner rubber layer is fitted together on the inner clamp and the isolation layer. The outer ring wall of the inner clamp and the outer ring wall of the isolation layer abut against the inner ring wall of the inner rubber layer. An inner shrink tube is fitted on the inner rubber layer. The outer ring wall of the inner rubber layer abuts against the inner ring wall of the inner shrink tube. The outer ring wall of the inner shrink tube is flush with the outer ring wall of the outer steel wire layer. The end wall of the inner shrink tube away from the outer sleeve and the opposite end wall of the outer steel wire layer facing the outer sleeve are in contact with each other.
7. A heat tracing pipe with a joint structure according to claim 2, characterized in that: The outer conductive layer includes an outer conductive sheet and an outer clamp. The outer clamp is sleeved on the outer steel wire layer. The outer conductive sheet is located between the outer clamp and the outer steel wire layer. The opposite surfaces of the outer clamp and the outer steel wire layer abut against the outer conductive sheet. One side of the outer conductive sheet is connected to the outer steel wire layer, and the other side of the outer conductive sheet is connected to the power line. The end wall of the outer clamp away from the outer sleeve is in contact with the opposite surface of the end wall of the protective layer facing the outer sleeve.
8. A heat tracing pipe with a joint structure according to claim 7, characterized in that: An outer rubber layer is fitted onto the outer clamp, and the outer ring wall of the outer clamp abuts against the inner ring wall of the outer rubber layer. An outer shrink tube is fitted onto the outer rubber layer, and the outer ring wall of the outer rubber layer abuts against the inner ring wall of the outer shrink tube. The end wall of the outer shrink tube away from the outer sleeve and the opposite end wall of the protective layer facing the outer sleeve are in contact with each other.