A multi-channel high-temperature resistant wiring compartment

Abstract

This utility model provides a multi-channel high-temperature resistant wiring compartment, belonging to the technical field of downhole electric heaters. It includes a vertically arranged wiring compartment shell, with cable pipes vertically arranged on both the left and right sides inside the shell. A heat dissipation component for cooling the two cable pipes is provided inside the casing, and a heating rod is vertically arranged below the two cable pipes. This multi-channel high-temperature resistant wiring compartment absorbs heat from inside the wiring compartment and lowers its temperature through forced convection heat transfer in the intensifier, primary spiral cavity, and secondary spiral cavity. It also achieves temperature uniformity through natural convection of gas inside the wiring compartment. Furthermore, the spatial discontinuity of the primary and secondary spiral cavities provides ample space for natural convection of gas inside the wiring compartment.

Description

Technical Field

[0001] This utility model belongs to the technical field of downhole electric heaters, specifically relating to a multi-channel high-temperature resistant wiring compartment. Background Technology

[0002] A cable is a rope-like cable made of several or several groups of conductors twisted together. Each group of conductors has at least two conductors, and each group of conductors is insulated from each other. They are often twisted around a central core and the entire cable is covered with a highly insulating outer layer. Cables are characterized by being internally energized and externally insulated. Depending on their function, cables can be classified as power cables, control cables, compensating cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, and so on.

[0003] In-situ extraction of unconventional energy sources such as oil-rich coal, oil shale, heavy oil, and viscous oil often requires in-situ heating with downhole electric heaters. However, when the cables in the wiring compartment of the downhole electric heater are exposed to high ambient temperatures, their power transmission efficiency may be affected due to excessive external temperatures. Therefore, a wiring compartment that can dissipate heat and cool the cables is needed. Utility Model Content

[0004] To achieve the above objectives, this utility model provides a multi-channel high-temperature resistant wiring compartment, including a vertically arranged wiring compartment shell, with cable pipes vertically arranged on both the left and right sides inside the wiring compartment shell, a heat dissipation component for dissipating heat from the two cable pipes inside the wiring compartment shell, and a heating rod vertically arranged below the two cable pipes.

[0005] Furthermore, the wiring compartment housing includes a vertically arranged upper housing, an upper cover plate fixedly connected to the top of the upper housing, a lower cover plate fixedly connected to the bottom of the housing, and a lower housing fixedly connected to the bottom of the lower cover plate;

[0006] The cable conduit and the heat dissipation assembly are located inside the upper housing, and the heating rod passes vertically through the lower cover plate and is fixedly connected to the lower cover plate.

[0007] Furthermore, the heat dissipation assembly includes a central tube body located between the two cable conduits, with the upper and lower ends of the central tube body passing through the upper cover plate and the lower cover plate, respectively.

[0008] The central tube body located inside the upper shell has a first-stage spiral cavity and a second-stage spiral cavity arranged in a spiral shape from top to bottom. The first-stage spiral cavity and the second-stage spiral cavity are arranged alternately in sequence, and the two cable tubes respectively vertically pass through the first-stage spiral cavity and the second-stage spiral cavity.

[0009] Furthermore, the central tube body includes a vertically arranged upper central tube, the upper end of which passes through the upper cover plate, a partition plate is fixedly connected to the lower end of the upper central tube, a vertical lower central tube is fixedly connected to the bottom of the partition plate, the lower end of the lower central tube passes through the lower cover plate and is located inside the lower housing, and a reinforcing device is provided inside the upper central tube.

[0010] Furthermore, a horizontal isolation plate is fixedly connected inside the upper housing, and a connecting area is separated at the upper part of the upper housing by the isolation plate. The isolation plate is fixedly sleeved on the upper central tube and the two cable tubes.

[0011] The uppermost ends of the primary spiral cavity and the secondary spiral cavity pass through the isolation plate and are located in the connecting area. The lower end of the primary spiral cavity is the first air inlet, the upper end of the primary spiral cavity is the first air outlet, the upper end of the secondary spiral cavity is the second air inlet, and the lower end of the secondary spiral cavity is the second air outlet.

[0012] The first-stage spiral cavity is fixedly connected to the lower end of the upper central tube through the first air inlet, and the first air inlet and the second air inlet are connected in the connection area. The second-stage spiral cavity is fixedly connected to the upper end of the lower central tube through the second air outlet.

[0013] Furthermore, the first air outlet is fixedly connected to and communicates with the second air inlet.

[0014] Furthermore, the port of the first air outlet is positioned directly opposite the port of the second air inlet.

[0015] Furthermore, the reinforcing device includes a vertical central rod, the lower end of which is fixedly connected to the upper surface of the partition plate, and spiral fins are sleeved on the outer side of the central rod.

[0016] Furthermore, the upper end of the cable conduit passes through the upper cover plate, and both the upper and lower ends of the cable conduit are fixedly connected to sealing joints, with the upper sealing joint fixed to the upper surface of the upper cover plate. The two ends of the cable inside the cable conduit pass through the two sealing joints at the upper and lower ends, respectively.

[0017] Furthermore, the sealing joint includes a hollow sealing support with an upward opening, a sealing ball inside the sealing support, a lower gasket at the bottom of the sealing ball, and a vertical preload spring fixedly connected to the bottom of the lower gasket. The lower end of the preload spring is fixedly connected to the inner bottom wall of the sealing support.

[0018] The upper part of the sealing ball is provided with an upper gasket, the upper gasket and the lower gasket are respectively fixedly connected to the inner side wall of the sealing support, and a limiting ring is provided horizontally above the upper gasket, and a number of rolling balance balls are provided on the circumference of the limiting ring.

[0019] The opening above the sealing support is covered with a sealing cap, and the lower surface of the sealing cap is provided with an annular protrusion in the middle. The protrusion is located inside the sealing support and abuts against the balance ball.

[0020] The cable passes sequentially through the sealing support, the preload spring, the lower gasket, the sealing ball, the upper gasket, the upper gasket, the limiting ring, and the sealing cover. Indicators are installed on both the left and right sides of the sealing cover.

[0021] The advantages of this utility model are: This utility model provides a multi-channel high-temperature resistant wiring compartment, which absorbs heat inside the wiring compartment and reduces its temperature through forced convection heat transfer in the intensifier, the primary spiral cavity and the secondary spiral cavity, and achieves the function of uniform temperature through the natural convection of gas inside the wiring compartment. At the same time, the spatial discontinuity of the primary spiral cavity and the secondary spiral cavity provides sufficient space for the natural convection of gas inside the wiring compartment.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the internal structure of the wiring compartment of this utility model.

[0024] Figure 2 This is a schematic diagram of the internal structure of the sealing joint of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1. Wiring compartment housing; 11. Upper housing; 12. Upper cover plate; 13. Lower cover plate; 14. Lower housing; 2. Cable conduit; 3. Heat dissipation assembly; 31. Central tube body; 311. Upper central tube; 312. Partition plate; 313. Lower central tube; 32. First-stage spiral cavity; 33. Second-stage spiral cavity; 34. Isolation plate; 35. Connecting area; 36. First air inlet; 37. First air outlet; 38. Second air inlet; 39. Second air outlet; 4. Intensifier; 41. Central rod; 42. Spiral fins; 5. Sealing joint; 51. Sealing support; 52. Sealing ball; 53. Lower gasket; 54. Preload spring; 55. Upper gasket; 56. Limiting ring; 57. Balance ball; 58. Sealing gland; 59. Boss; 6. Indicator; 7. Cable; 8. Heating rod. Detailed Implementation

[0026] To further illustrate the technical means and effects of this utility model in achieving its intended purpose, the specific implementation methods, structural features and effects of this utility model are described in detail below with reference to the accompanying drawings and embodiments.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "aligned", "overlapping", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] Example 1

[0031] This embodiment provides, for example Figure 1 and Figure 2 The multi-channel high-temperature resistant wiring compartment shown includes a vertically arranged wiring compartment shell 1. Cable tubes 2 are vertically arranged on both the left and right sides inside the wiring compartment shell 1. A heat dissipation component 3 is provided inside the wiring compartment shell 1 for dissipating heat from the two cable tubes 2. A heating rod 8 is vertically arranged below the two cable tubes 2. The cable 7 in the cable tube 2 is electrically connected to the heating rod 8 to supply power to the heating rod. The wiring compartment shell 1 includes a vertically arranged upper shell 11. An upper cover plate 12 is fixedly connected to the top of the upper shell 11, and a lower cover plate 13 is fixedly connected to the bottom of the shell. A lower shell 14 is fixedly connected to the bottom of the lower cover plate 13. A sealed space can be formed by the cooperation of the upper cover plate 12, the upper shell 11 and the lower cover plate 13. The heating rod 8 passes vertically through the lower cover plate 13 and is fixedly connected to the lower cover plate 13.

[0032] The cable conduit 2 and the heat dissipation assembly 3 are located inside the upper housing 11. The heat dissipation assembly 3 includes a central tube 31, which is located between the two cable conduits 2. The upper and lower ends of the central tube 31 pass through the upper cover plate 12 and the lower cover plate 13, respectively. The portion of the central tube 31 inside the upper housing 11 is spirally arranged with a primary spiral cavity 32 and a secondary spiral cavity 33 from top to bottom. The primary spiral cavity 32 and the secondary spiral cavity 33 are arranged alternately. The two cable conduits 2 vertically pass through the primary spiral cavity 32 and the secondary spiral cavity 33, respectively. The cable conduit 2 is used to pass through the cable 7, and passes through the primary spiral cavity 32 and the secondary spiral cavity 33, so that the cable conduit 2 forms an independent space. The space between the cable 7 and the cable conduit 2 is filled with a nanofluid with high thermal conductivity. The heat generated by the cable 7 is carried away by the airflow scouring the cable conduit 2.

[0033] The central tube body 31 includes a vertically arranged upper central tube 311, the upper end of which passes through the upper cover plate 12. The lower end of the upper central tube 311 is fixedly connected to a partition plate 312. The bottom of the partition plate 312 is fixedly connected to a vertical lower central tube 313. The partition plate 312 is used to separate the upper central tube 311 and the lower central tube 313. The lower end of the lower central tube 313 passes through the lower cover plate 13 and is located inside the lower housing 14. A reinforcing device 4 is provided inside the upper central tube 311. A horizontal isolation plate 34 is fixedly connected inside the upper housing 11. The upper part of the upper housing 11 is separated into a connecting area 35 by the isolation plate 34. The isolation plate 34 is fixedly sleeved on the upper central tube 311 and the two cable pipes 2.

[0034] The uppermost ends of the primary spiral cavity 32 and the secondary spiral cavity 33 pass through the partition plate 34 and are located in the connecting area 35. The lower end of the primary spiral cavity 32 is the first air inlet 36, and the upper end of the primary spiral cavity 32 is the first air outlet 37. The upper end of the secondary spiral cavity 33 is the second air inlet 38, and the lower end of the secondary spiral cavity 33 is the second air outlet 39. The primary spiral cavity 32 is fixedly connected to the lower end of the upper central tube 311 through the first air inlet 36. The first air inlet 36 and the second air inlet 38 are located in the connecting area 35. The internal connection, in conjunction with the isolation plate 34, can form a space connecting the primary spiral cavity 32 and the secondary spiral cavity 33. The first air outlet 37 and the second air inlet 38 can be fixedly connected and interconnected; or, the port of the first air outlet 37 and the port of the second air inlet 38 can be set to correspond to each other, as long as the airflow of the primary spiral cavity 32 can be delivered to the secondary spiral cavity 33. The secondary spiral cavity 33 is fixedly connected to the upper end of the lower central tube 313 through the second air outlet 39.

[0035] In use, the gas first enters from the upper end of the upper central tube 311, flows through the intensifier 4 to the lower end of the upper central tube 311, then flows into the first-stage spiral cavity 32 through the first air inlet 36 connected to the lower end of the upper central tube 311, and flows out from the first air outlet 37 at the upper end of the first-stage spiral cavity 32. Then, in the connecting area 35, it flows into the second-stage spiral cavity 33 through the second air inlet 38 connected to the first air outlet 37, and flows into the lower central tube 313 from the second air outlet 39 at the lower end of the second-stage spiral cavity 33. Finally, it is discharged from the lower end of the lower central tube 313. The intensifier 4 includes a vertical central rod 41. The lower end of the central rod 41 is fixedly connected to the upper surface of the partition plate 312. Spiral fins 42 are fixedly sleeved on the outer side of the central rod 41. The spiral fins 42 are used to increase the flow velocity of the airflow on the inner wall of the upper central tube 311 and enhance the heat exchange effect. The central rod 41 is used to support the spiral fins 42 and increase the flow velocity of the airflow in the upper central tube 311.

[0036] Furthermore, the upper end of the cable conduit 2 passes through the upper cover plate 12, and both the upper and lower ends of the cable conduit 2 are fixedly connected with sealing joints 5, and the upper sealing joint 5 is fixed on the upper surface of the upper cover plate 12. The two ends of the cable 7 inside the cable conduit 2 pass through the two sealing joints 5 at the upper and lower ends respectively.

[0037] The sealing joint 5 includes a hollow sealing support 51 with its opening facing upwards. A sealing ball 52 is provided inside the sealing support 51. A lower gasket 53 is provided at the bottom of the sealing ball 52. A vertical preload spring 54 is fixedly connected to the bottom of the lower gasket 53, and the lower end of the preload spring 54 is fixedly connected to the inner bottom wall of the sealing support 51. An upper gasket 55 is provided above the sealing ball 52. The upper gasket 55 and the lower gasket 53 are respectively fixedly connected to the inner side wall of the sealing support 51. The upper gasket 55... A limiting ring 56 is provided horizontally, and several rolling balance balls 57 are provided on the circumference of the limiting ring 56; a sealing cover 58 is provided at the opening above the sealing support 51, and an annular boss 59 is provided in the middle of the lower surface of the sealing cover 58. The boss 59 is located inside the sealing support 51 and abuts against the balance balls 57; the cable 7 passes through the sealing support 51, the preload spring 54, the lower gasket 53, the sealing ball 52, the upper gasket 55, the limiting ring 56 and the sealing cover 58 in sequence.

[0038] The sealing joints 5, located at both the top and bottom of the cable conduit 2, are used to seal the cable conduit 2, reducing the probability of moisture ingress. By setting the sealing joints 5, the hard seal of the cable 7 and the junction box can be effectively improved, thus facilitating the connection and disassembly of the cable 7 and making it more flexible. The preload spring 54 is used to provide a force parallel to the axis of the cable 7 when disassembling the sealing joint 5, and at the same time, it can prevent the sealing cover 58 from loosening during transportation. The balance ball 57 is used to evenly distribute the squeezing force of the sealing cover 58 during the tightening process, preventing the sealing cover 58 and the upper gasket 55 from sticking together. The limiting ring 56 is used to limit the position of the balance ball 57, so that the balance ball 57 is evenly distributed. Indicators 6 are installed on both sides of the sealing cover 58. The indicators 6 can display the clamping force of the sealing joint 5 through laser ranging.

[0039] In summary, this utility model provides a multi-channel high-temperature resistant wiring compartment. Through forced convection heat transfer in the intensifier 4, the primary spiral cavity 32, and the secondary spiral cavity 33, the heat inside the wiring compartment is absorbed, reducing its temperature. The temperature is also uniform through the natural convection of the gas inside the wiring compartment. At the same time, the spatial discontinuity of the primary spiral cavity 32 and the secondary spiral cavity 33 provides ample space for the natural convection of the gas inside the wiring compartment.

[0040] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A multi-channel high-temperature-resistant terminal block, characterized in that: It includes a vertically arranged wiring compartment housing (1), with cable pipes (2) vertically arranged on both the left and right sides inside the wiring compartment housing (1), a heat dissipation component (3) for dissipating heat from the two cable pipes (2) inside the wiring compartment housing (1), and a heating rod (8) vertically arranged below the two cable pipes (2).

2. The multi-channel high-temperature resistant wiring compartment as described in claim 1, characterized in that: The wiring compartment housing (1) includes a vertically arranged upper housing (11), an upper cover plate (12) is fixedly connected to the top of the upper housing (11), a lower cover plate (13) is fixedly connected to the bottom of the housing, and a lower housing (14) is fixedly connected to the bottom of the lower cover plate (13). The cable conduit (2) and the heat dissipation assembly (3) are located inside the upper housing (11), and the heating rod (8) passes vertically through the lower cover plate (13) and is fixedly connected to the lower cover plate (13).

3. The multi-channel high-temperature resistant wiring compartment as described in claim 2, characterized in that: The heat dissipation component (3) includes a central tube (31), which is located between the two cable pipes (2). The upper and lower ends of the central tube (31) pass through the upper cover plate (12) and the lower cover plate (13), respectively. The central tube (31) located inside the upper shell (11) is spirally arranged with a first-stage spiral cavity (32) and a second-stage spiral cavity (33) from top to bottom. The first-stage spiral cavity (32) and the second-stage spiral cavity (33) are arranged alternately. The two cable tubes (2) respectively vertically penetrate the first-stage spiral cavity (32) and the second-stage spiral cavity (33).

4. The multi-channel high-temperature resistant wiring compartment as described in claim 3, characterized in that: The central tube (31) includes a vertically arranged upper central tube (311), the upper end of which passes through the upper cover plate (12), and a partition plate (312) is fixedly connected to the lower end of the upper central tube (311). A vertical lower central tube (313) is fixedly connected to the bottom of the partition plate (312). The lower end of the lower central tube (313) passes through the lower cover plate (13) and is located inside the lower housing (14). A reinforcing device (4) is provided inside the upper central tube (311).

5. A multi-channel high-temperature resistant wiring compartment as described in claim 4, characterized in that: A horizontal isolation plate (34) is fixedly connected inside the upper housing (11). A connecting area (35) is separated at the upper part of the upper housing (11) by the isolation plate (34). The isolation plate (34) is fixedly sleeved on the upper central tube (311) and the two cable tubes (2). The uppermost ends of the primary spiral cavity (32) and the secondary spiral cavity (33) pass through the isolation plate (34) and are located in the connecting area (35). The lower end of the primary spiral cavity (32) is the first air inlet (36), the upper end of the primary spiral cavity (32) is the first air outlet (37), the upper end of the secondary spiral cavity (33) is the second air inlet (38), and the lower end of the secondary spiral cavity (33) is the second air outlet (39). The first-stage spiral cavity (32) is fixedly connected to the lower end of the upper central tube (311) through the first air inlet (36), the first air outlet (37) and the second air inlet (38) are connected in the connecting area (35), and the second-stage spiral cavity (33) is fixedly connected to the upper end of the lower central tube (313) through the second air outlet (39).

6. The multi-channel high-temperature resistant wiring compartment as described in claim 5, characterized in that: The first air outlet (37) is fixedly connected to and communicates with the second air inlet (38).

7. A multi-channel high-temperature resistant wiring compartment as described in claim 5, characterized in that: The port of the first air outlet (37) is positioned directly opposite the port of the second air inlet (38).

8. A multi-channel high-temperature resistant wiring compartment as described in claim 4, characterized in that: The reinforcing device (4) includes a vertical central rod (41), the lower end of which is fixedly connected to the upper surface of the partition plate (312), and a spiral fin (42) is sleeved on the outer side of the central rod (41).

9. A multi-channel high-temperature resistant wiring compartment as described in claim 2, characterized in that... The upper end of the cable pipe (2) passes through the upper cover plate (12). Both the upper and lower ends of the cable pipe (2) are fixedly connected to sealing joints (5), and the upper sealing joint (5) is fixed to the upper surface of the upper cover plate (12). The two ends of the cable (7) inside the cable pipe (2) pass through the two sealing joints (5) at the upper and lower ends respectively.

10. A multi-channel high-temperature resistant wiring compartment as described in claim 9, characterized in that: The sealing joint (5) includes a hollow sealing support (51) with the opening facing upward. The sealing support (51) is provided with a sealing ball (52). The bottom of the sealing ball (52) is provided with a lower gasket (53). The bottom of the lower gasket (53) is fixedly connected to a vertical preload spring (54). The lower end of the preload spring (54) is fixedly connected to the inner bottom wall of the sealing support (51). The upper part of the sealing ball (52) is provided with an upper gasket (55), the upper gasket (55) and the lower gasket (53) are respectively fixedly connected to the inner side wall of the sealing support (51), and a limiting ring (56) is provided horizontally above the upper gasket (55), and a plurality of rolling balance balls (57) are provided on the circumference of the limiting ring (56). The opening above the sealing support (51) is covered with a sealing cap (58), and the lower surface of the sealing cap (58) is provided with an annular boss (59). The boss (59) is located inside the sealing support (51) and abuts against the balance ball (57). The cable (7) passes through the sealing support (51), the preload spring (54), the lower gasket (53), the sealing ball (52), the upper gasket (55), the upper gasket (55), the limiting ring (56), and the sealing cover (58) in sequence. Indicators (6) are installed on both the left and right sides of the sealing cover (58).

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