Junction box and gas turbine generator set

Abstract

The utility model discloses a junction box and a gas turbine generator set, comprising a box body, a box cover detachably connected with the box body, and a sealing mechanism arranged on the box body and used for passing through and holding a cable. The sealing mechanism comprises square sealing blocks used for allowing a cable to penetrate through and square fasteners used for applying pressure to the square sealing blocks, at least two square sealing blocks are tightly arranged in the first direction to form sealing assemblies, and the multiple sealing assemblies are arranged in the second direction perpendicular to the first direction. The square fastener applies pressure to the multiple sealing assemblies in the second direction; the cable dismounting device is ingenious in structure, easy and convenient to operate, capable of greatly shortening the cable dismounting time and improving the cable dismounting efficiency, and wide in application range.

Description

Technical Field

[0001] This utility model relates to the field of gas turbine technology, and in particular, to a junction box. Furthermore, this utility model also relates to a gas turbine generator set including the aforementioned junction box. Background Technology

[0002] The core components inside the enclosure 100 of the gas turbine generator set are the gas turbine and fuel system. To ensure the safe operation of the gas turbine, the main unit is equipped with numerous measuring points, including temperature, pressure, speed, and vibration. These measuring points are installed on the surface of the gas turbine or on the pipelines. The generator set controller is located in the control room outside the enclosure 100. The junction box 200's function is to transfer these measuring point signals to the generator set controller. Therefore, the existing junction box 200 is installed nearby inside the enclosure 100, such as... Figure 1 As shown, the junction box 200 is installed in the high-temperature area inside the enclosure 100. The high temperature will cause certain damage to the wiring terminals, thermocouple compensation cables, cable shells, etc. inside the junction box 200, affecting the service life of the cables.

[0003] like Figure 2 As shown, the existing junction box 200 has multiple mounting holes 201 on its side, and cable glands are arranged on the mounting holes 201. Cables are fixed by entering and exiting through the cable glands. When installing the cable glands, the outer diameter of each cable needs to be checked and tightened one by one. The installation is time-consuming and inefficient. Utility Model Content

[0004] This utility model provides a junction box and a gas turbine generator set to solve the technical problems of long installation time and low efficiency of existing junction boxes.

[0005] According to one aspect of the present invention, a junction box is provided, including a box body, a box cover detachably connected to the box body, and a sealing mechanism arranged on the box body for passing through and holding cables. The sealing mechanism includes a square sealing block for passing through the cable and a square fastener for applying pressure to the square sealing block. At least two of the square sealing blocks are closely arranged along a first direction to form a sealing assembly, and a plurality of the sealing assemblies are arranged along a second direction perpendicular to the first direction. The square fastener applies pressure to the plurality of sealing assemblies along the second direction.

[0006] Furthermore, the square fastener includes a first trapezoidal block, a second trapezoidal block, a third trapezoidal block symmetrically arranged with respect to the first trapezoidal block, and a fastening screw. The two ends of the first trapezoidal block and the two ends of the second trapezoidal block are respectively connected by two of the third trapezoidal blocks. The enclosed space of the first trapezoidal block, the second trapezoidal block, and the third trapezoidal block forms an X-shaped fastening gap. The fastening screw passes through the first trapezoidal block and is screwed to the second trapezoidal block. Rotating the fastening screw causes the inclined surfaces of the first trapezoidal block and the second trapezoidal block to abut against the inclined surfaces of the two third trapezoidal blocks respectively. By adjusting the distance between the first trapezoidal block and the second trapezoidal block, the pressure applied to the sealing assembly by the third trapezoidal block is adjusted.

[0007] Furthermore, the box body is provided with windows, and the sealing mechanism is embedded in the windows.

[0008] Furthermore, a partition plate is provided between two adjacent sealing components.

[0009] Furthermore, the square sealing block is connected to the isolation plate and / or two adjacent square sealing blocks through a slot-block structure.

[0010] Furthermore, the square sealing block has a through hole for the cable to pass through, and the inner wall of the through hole is provided with multiple diameter adjustment layers.

[0011] According to another aspect of the present invention, a gas turbine generator set is also provided, which includes the aforementioned junction box.

[0012] Furthermore, the exterior of the gas turbine generator set housing is provided with mounting bases for connecting the housing, and the mounting bases are connected to the housing via vibration damping connectors.

[0013] Furthermore, a second sealing element is provided at the connection between the vibration damping connector and the housing.

[0014] Furthermore, a first sealing element is provided at the joint between the box body and the box cover.

[0015] This utility model has the following beneficial effects:

[0016] This utility model's junction box features a rectangular sealing block with two square end faces, each with a through hole perpendicular to the square end face for cable passage. Multiple rectangular sealing blocks with identical end face dimensions are closely arranged along a first direction to form a sealing assembly. These sealing assemblies are then closely arranged along a second direction, allowing for free combination based on cable outer diameter and the number of cables of different specifications. In use, a preset pressure is first applied to the sealing assembly using square fasteners, causing multiple sealing assemblies to form a single unit. The cable is then passed through a square sealing block of the corresponding specification. The pressure applied to the sealing assembly is then increased by the square fasteners, causing the square sealing block to tightly grip the cable passing through, thus sealing and securing the cable without the need for individual cable tightening. When the cable needs to be removed, the pressure applied to the sealing assembly is reduced by the square fasteners, allowing the cable to be pulled out of the square sealing block without disassembling individual glands. Its ingenious structure and simple operation significantly reduce cable installation and removal time, improve efficiency, and have a wide range of applications.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 It is an assembly diagram of a gas turbine generator set and junction box in the existing technology;

[0020] Figure 2 This is a structural diagram of a junction box in the prior art;

[0021] Figure 3 This is a front view of the junction box according to a preferred embodiment of the present invention;

[0022] Figure 4 This is a bottom view of the junction box according to a preferred embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the sealing mechanism of a preferred embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of a square fastener according to a preferred embodiment of the present invention; wherein, Figure 6 (a) is a structural diagram of the initial state of the square fastener; Figure 6 (b) is a schematic diagram of the structure when the square fastener applies pressure to the sealing assembly;

[0025] Figure 7 This is a perspective view of a square fastener according to a preferred embodiment of the present invention; wherein, Figure 7 (a) is a three-dimensional view of the initial state of the square fastener; Figure 7 (b) is a perspective view of the square fastener applying pressure to the sealing assembly;

[0026] Figure 8 This is a schematic diagram of the structure of the square sealing block according to a preferred embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of a preferred embodiment of the present invention, showing how two adjacent square sealing blocks are connected by a slot-block structure.

[0028] Figure 10 This is a schematic diagram of the structure in which the square sealing block and the isolation plate are connected by a slot and block structure according to a preferred embodiment of the present invention;

[0029] Figure 11 This is a schematic diagram of the structure of a gas turbine generator set according to a preferred embodiment of the present invention.

[0030] Legend:

[0031] 100. Enclosure; 101. Mounting base; 200. Junction box; 201. Mounting hole; 1. Enclosure body; 11. Window; 2. Enclosure cover; 3. Sealing mechanism; 31. Square sealing block; 311. Through hole; 312. Adjusting layer; 313. Locking block; 314. Locking groove; 32. Square fastener; 321. First trapezoidal block; 322. Second trapezoidal block; 323. Third trapezoidal block; 324. Fastening screw; 325. X-shaped fastening gap; 33. Sealing assembly; 33a. First sealing assembly; 33b. Second sealing assembly; 33c. Third sealing assembly; 33d. Fourth sealing assembly; 34. Isolation plate; 4. First sealing element; 5. Vibration damping connector; 6. Second sealing element. Detailed Implementation

[0032] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0033] Please refer to the following: Figures 3 to 11The junction box of this embodiment includes a box body 1, a box cover 2 detachably connected to the box body 1, and a sealing mechanism 3 arranged on the box body 1 for passing through and holding cables. The sealing mechanism 3 includes a square sealing block 31 for passing through the cable and a square fastener 32 for applying pressure to the square sealing block 31. At least two square sealing blocks 31 are arranged closely along a first direction to form a sealing assembly 33. A plurality of sealing assemblies 33 are arranged along a second direction perpendicular to the first direction. The square fastener 32 applies pressure to the plurality of sealing assemblies 33 along the second direction.

[0034] In this embodiment, the junction box has a rectangular sealing block 31, with two square end faces and through holes 311 for cables to pass through, perpendicular to the square end faces. Figure 5As shown, multiple square sealing blocks 31 with identical square end face dimensions are closely arranged along a first direction (lateral) to form a sealing assembly 33. Multiple sealing assemblies 33 are also closely arranged along a second direction (longitudinal). For example, the first sealing assembly 33a consists of two square sealing blocks 31 closely arranged along the first direction, the second sealing assembly 33b consists of three square sealing blocks 31 closely arranged along the first direction, the third sealing assembly 33c consists of four square sealing blocks 31 closely arranged along the first direction, and the fourth sealing assembly 33d consists of six square sealing blocks 31 closely arranged along the first direction. The sealing mechanism 3 is formed by freely combining the first sealing assembly 33a, the second sealing assembly 33b, the third sealing assembly 33c, and the fourth sealing assembly 33d, and is closely arranged along the second direction. It is understood that the sealing assembly 33 can also be formed by arranging more square sealing blocks 31, depending on the cable outer diameter. The specifications and quantity of cables of different specifications can be freely combined. In use, a preset pressure is first applied to the sealing assembly 33 using the square fastener 32 (ensuring that adjacent sealing assemblies 33 can remain relatively stationary without external force), causing multiple sealing assemblies 33 to form a whole. The cable is then passed through the corresponding specification square sealing block 31. The pressure applied to the sealing assembly 33 is then increased using the square fastener 32, causing the square sealing block 31 to tightly grip the cable passing through, thus achieving sealing and fixing of the cable without the need to tighten each cable individually. When the cable needs to be removed, the pressure applied to the sealing assembly 33 by the square fastener 32 is reduced, allowing the cable to be pulled out from the square sealing block 31 without disassembling each gland individually. Its ingenious structure and simple operation significantly shorten cable installation and removal time, improve efficiency, and have a wide range of applications. Optionally, through holes 311 with different inner diameters are formed on the square sealing blocks 31 with the same square end face size. Optionally, the enclosure 1 and the cover 2 are connected by screws, which is simple in structure, stable in connection, and can prevent the cover 2 from vibrating relative to the enclosure 1. Optionally, the enclosure 1 and the cover 2 are hinged on one side by a hinge, and connected on the other side by a pin or lock, which facilitates opening the cover 2 for maintenance.

[0035] like Figure 6 and Figure 7As shown, in this embodiment, the square fastener 32 includes a first trapezoidal block 321, a second trapezoidal block 322 symmetrically arranged with respect to the first trapezoidal block 321, a third trapezoidal block 323, and a fastening screw 324. The two ends of the first trapezoidal block 321 and the two ends of the second trapezoidal block 322 are respectively connected by two third trapezoidal blocks 323. The enclosed space of the first trapezoidal block 321, the second trapezoidal block 322, and the third trapezoidal block 323 forms an X-shaped fastening gap 325. The fastening screw 324 passes through the first trapezoidal block 321 and is screwed onto the second trapezoidal block 322. Rotating the fastening screw 324 causes the inclined surfaces of the first trapezoidal block 321 and the second trapezoidal block 322 to abut against the inclined surfaces of the two third trapezoidal blocks 323, respectively. By adjusting the distance between the first trapezoidal block 321 and the second trapezoidal block 322, the distance between the two third trapezoidal blocks 323 changes, thereby adjusting the pressure applied by the third trapezoidal blocks 323 to the sealing assembly 33. The fastener 32 has an ingenious structure. The length of the hypotenuse of the third trapezoidal block 323 is greater than that of the first trapezoidal block 321. When the fastening screw 324 is rotated, the inclined surfaces of the first trapezoidal block 321 and the second trapezoidal block 322 slide relative to the inclined surfaces of the two third trapezoidal blocks 323. This ensures that the distance between the two third trapezoidal blocks 323 changes uniformly along the second direction, and that the third trapezoidal blocks 323 apply uniform pressure to the sealing assembly 33. On the one hand, by applying pressure to the sealing assembly 33 through the square fastener 32, the sealing mechanism 3 can grip the cable tightly, ensuring the sealing effect between the square sealing block 31 and the cable. On the other hand, the adjustment space of the square fastener 32 in the second direction can provide clearance space for the combination of square sealing blocks 31 of different specifications, thereby improving the applicability. In addition, the square fastener 32 will not produce gaps during the extension and retraction along the second direction, ensuring the sealing effect of the sealing mechanism 3.

[0036] like Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, a window 11 is provided on the bottom surface of the housing 1, and the sealing mechanism 3 is embedded in the window 11. Since the outer diameter of cables varies, different sizes of square sealing blocks 31 are selected and assembled into the window 11 to accommodate cables of the same type but different outer diameters, ensuring the sealing performance between the sealing mechanism 3 and the cable. Optionally, at least one square fastener 32 is provided along the second direction in the window 11, such as... Figure 5 In this case, it is sufficient to install a square fastener 32 at the top of the window 11 to meet the usage requirements; it is understood that a square fastener 32 can also be installed at the bottom of the window 11, or a square fastener 32 can be installed at the top and bottom of the window 11 respectively. If the length of the window 11 along the second direction is long, a square fastener 32 can also be installed between two adjacent sealing components 33, which can be adjusted according to specific usage requirements.

[0037] like Figure 5 As shown, in this embodiment, an isolation plate 34 is provided between two adjacent sealing components 33. The isolation plate 34 can make the square sealing blocks 31 of each group of sealing components 33 more regular and avoid gaps between two adjacent square sealing blocks 31. After the sealing components 33 and the isolation plate 34 are installed, they are fastened with square fasteners 32. By rotating the fastening screws 324 on the square fasteners 32, the square fasteners 32 deform and expand outward in the second direction, thereby pressing and sealing the layers of sealing components 33, which can enhance the sealing performance of the overall structure of the sealing mechanism 3.

[0038] like Figure 9 As shown, in this embodiment, two adjacent square sealing blocks 31 are connected by a slot 314 and a block 313. Both the slot 314 and the block 313 are arranged along the second direction, which increases the overall rigidity of the sealing mechanism 3 and prevents the square sealing blocks 31 from slipping when passing through cables. Optionally, the slot 314 penetrates the side wall of the square sealing block 31, and the block 313 has the same extension length as the slot 314, ensuring no gap between the block 313 and the slot 314. This strengthens the sealing effect between the two adjacent square sealing blocks 31 and prevents external moisture and impurities from entering the junction box. Optionally, the slot 314 is a dovetail groove, and the block 313 is adapted to the slot 314, resulting in a simple structure and a firm connection.

[0039] like Figure 10 As shown, in this embodiment, the square sealing block 31 and the isolation plate 34 are connected by a slot 314 and a locking block 313. Both the slot 314 and the locking block 313 are arranged along the first direction. On the one hand, this increases the overall rigidity of the sealing mechanism 3, preventing the square sealing block 31 from slipping off the isolation plate 34 when the cable passes through. On the other hand, it strengthens the sealing effect between two adjacent square sealing blocks 31, preventing external moisture and impurities from entering the junction box. Optionally, the slot 314 is a dovetail groove, and the locking block 313 is adapted to the slot 314, resulting in a simple structure and a firm connection.

[0040] like Figure 8As shown in this embodiment, the square sealing block 31 has a through hole 311 for the cable to pass through. Three adjusting layers 312 are arranged on the inner wall of the through hole 311. It can be understood that the number of adjusting layers 312 on the inner wall of the through hole 311 can be one, two, four, or more, depending on the usage requirements. Since the outer diameter of cables varies, the through hole 311 may not perfectly match the outer diameter of the cable. Customizing a square sealing block 31 of this specification would take a long time and affect the normal assembly of the gas turbine generator set. If a smaller square sealing block 31 is used for manual processing, the inner wall of the through hole 311 may not fit the outer diameter of the cable, resulting in poor sealing. Therefore, multiple adjusting layers 312 are provided on the inner wall of the through hole 311 so that the inner diameter of the through hole 311 can be adjusted according to the outer diameter of the cable. Removing one or more adjusting layers 312 allows the cable to be clamped. Optionally, the thickness of the adjusting layer 312 is 0.5–1 mm.

[0041] like Figure 11 As shown, a gas turbine generator set includes the aforementioned junction box. In use, a preset pressure is first applied to the sealing assembly 33 using square fasteners 32 (ensuring that adjacent sealing assemblies 33 can remain relatively stationary without external force), causing multiple sealing assemblies 33 to form a single unit. The cable is then passed through a square sealing block 31 of the corresponding specification. The pressure applied to the sealing assembly 33 is then increased using the square fasteners 32, causing the square sealing block 31 to tightly grip the cable passing through it, thus achieving sealing and fixing of the cable without the need to tighten each cable individually. When the cable needs to be removed, the pressure applied to the sealing assembly 33 by the square fasteners 32 is reduced, allowing the cable to be pulled out from the square sealing block 31 without disassembling each gland individually. Its ingenious structure and simple operation significantly shorten the time for cable installation and removal, improving the efficiency of cable installation and removal in gas turbine generator sets. It is applicable to different models of gas turbine generator sets.

[0042] like Figure 3 , Figure 4 and Figure 11As shown, in this embodiment, the exterior of the gas turbine generator set enclosure 100 is provided with a mounting base 101 for connecting the enclosure 1. The junction box is located outside the enclosure 100, placing it in ambient temperature. This prevents the components inside the junction box from being affected by high temperatures, extending their service life, reducing downtime for maintenance, and improving the utilization rate of the gas turbine generator set. The mounting base 101 and the enclosure 1 are connected by a vibration damping connector 5. Optionally, the vibration damping connector 5 includes a bolt and nut assembly and an elastic buffer. The elastic buffer is located between the mounting base 101 and the enclosure 1. The bolt passes through the mounting base 101, the elastic buffer, and the enclosure 1, and is locked with a nut, providing stable support for the junction box and preventing damage to the junction box caused by gas turbine vibration. Optionally, the elastic buffer is a rubber pad or a spring, which has a simple structure, low cost, and is easy to procure. Optionally, the junction box is positioned directly aligned with the gas turbine, and the cable is accessed from the bottom of the junction box. This reduces the cable bending path and saves wire. Furthermore, the sealing mechanism 3 is located on the bottom of the junction box to prevent rainwater from flowing into the junction box.

[0043] like Figure 3 and Figure 4 As shown, in this embodiment, a second sealing element 6 is provided at the connection between the vibration damping connector 5 and the housing 1, which can improve the waterproof rating of the junction box and ensure that the junction box can work normally even outside the housing 100. Optionally, the second sealing element 6 is a sealing gasket or sealant.

[0044] like Figure 4 As shown, in this embodiment, a first sealing element 4 is provided at the joint between the box body 1 and the box cover 2, which can improve the waterproof rating of the junction box and ensure that the junction box can work normally even outside the box body 100. Optionally, the first sealing element 4 is a sealing ring, a sealing edge, or sealant.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A junction box, characterized in that, The device includes a housing (1), a cover (2) detachably connected to the housing (1), and a sealing mechanism (3) arranged on the housing (1) for passing through and holding a cable. The sealing mechanism (3) includes a square sealing block (31) for passing through the cable and a square fastener (32) for applying pressure to the square sealing block (31). At least two of the square sealing blocks (31) are arranged closely along a first direction to form a sealing assembly (33). A plurality of the sealing assemblies (33) are arranged along a second direction perpendicular to the first direction. The square fastener (32) applies pressure to the plurality of sealing assemblies (33) along the second direction.

2. The junction box according to claim 1, characterized in that, The square fastener (32) includes a first trapezoidal block (321), a second trapezoidal block (322) symmetrically arranged with respect to the first trapezoidal block (321), a third trapezoidal block (323), and a fastening screw (324). The two ends of the first trapezoidal block (321) and the two ends of the second trapezoidal block (322) are respectively connected by two of the third trapezoidal blocks (323). The enclosed space of the first trapezoidal block (321), the second trapezoidal block (322), and the third trapezoidal block (323) forms an X-shaped fastening gap (3). 25) The fastening screw (324) passes through the first trapezoidal block (321) and is screwed to the second trapezoidal block (322). Rotating the fastening screw (324) causes the inclined surfaces of the first trapezoidal block (321) and the second trapezoidal block (322) to abut against the inclined surfaces of the two third trapezoidal blocks (323) respectively. By adjusting the distance between the first trapezoidal block (321) and the second trapezoidal block (322), the pressure applied by the third trapezoidal block (323) to the sealing assembly (33) is adjusted.

3. The junction box according to claim 1 or 2, characterized in that, The box (1) is provided with a window (11), and the sealing mechanism (3) is embedded in the window (11).

4. The junction box according to claim 3, characterized in that, A partition plate (34) is provided between two adjacent sealing assemblies (33).

5. The junction box according to claim 4, characterized in that, The square sealing block (31) is connected to the isolation plate (34) and / or two adjacent square sealing blocks (31) are connected by a slot and block structure.

6. The junction box according to claim 1, characterized in that, The square sealing block (31) has a through hole (311) for the cable to pass through, and the inner wall of the through hole (311) is provided with multiple diameter adjustment layers (312).

7. A gas turbine generator set, characterized in that, The junction box includes any one of claims 1 to 6.

8. The gas turbine generator set according to claim 7, characterized in that, The exterior of the enclosure (100) of the gas turbine generator set is provided with a mounting base (101) for connecting the enclosure (1), and the mounting base (101) and the enclosure (1) are connected by a vibration damping connector (5).

9. The gas turbine generator set according to claim 8, characterized in that, A second sealing element (6) is provided at the connection between the vibration damping connector (5) and the housing (1).

10. The gas turbine generator set according to claim 7, characterized in that, A first sealing element (4) is provided at the joint between the box body (1) and the box cover (2).

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