Explosion-proof high-voltage cable junction box

Abstract

The invention discloses an explosion-proof high-voltage cable junction box, and relates to the technical field of high-voltage cable junction boxes. According to the explosion-proof high-voltage cable junction box, through cooperation of the annular main shell and the middle connecting annular frame, the junction box can be conveniently disassembled, the assembling convenience of a high-voltage cable is effectively improved, meanwhile, through cooperation of an inner sliding rod and an arc-shaped pressing rod, the high-voltage cable can be pressed down when the high-voltage cable is assembled, and the high-voltage cable can be conveniently assembled. And during use, through cooperation of the inner sliding rod and the positioning sleeve rod, the force borne by the end part of the high-voltage cable can be buffered, and the use safety and the connection stability of the high-voltage cable are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage cable junction boxes, and particularly to an explosion-proof high-voltage cable junction box. Background Art

[0002] The explosion-proof enclosure of the junction box is of steel plate structure, the cover adopts a bolted pressing form, both sides are power lead terminals, and a control line introduction device is provided. There are three main wiring terminals inside the housing, and the cable head is pressed by a pressing plate on the wiring post; the base is made of high-voltage electric porcelain, and an auxiliary wiring terminal is provided; the cable junction box is mainly used to install a cable cone to connect the external transmission cable, with a total of three-phase input cables. Its main problem is that arcing is extremely likely to occur at the cable cone interface, resulting in a sharp expansion of the internal SF6 gas and explosion, which will not only damage the entire main body of the switchgear, but also cause the power supply line to be cut off; referring to the Chinese patent, the publication number is: "CN111106591A", "An explosion-proof ultra-high voltage cable junction box for GIS", this patent points out that the existing cable junction box is extremely likely to cause arcing, and it only designs a grounding block OKT105 on the outside of the annular main housing NDK100 near the cable cone interface to conduct the current generated by internal discharge into the ground, with a low safety factor; however, this device still has problems with the assembly convenience of high-voltage cables and poor protection effect. For this reason, we propose an explosion-proof high-voltage cable junction box to solve the above problems. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides an explosion-proof high-voltage cable junction box, which solves the problems raised in the above background art.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: An explosion-proof high-voltage cable junction box includes an annular main housing, a positioning flange is fixedly installed on the outside of the annular main housing, a middle connecting ring frame and an annular upper sealing plate are respectively installed above the annular main housing, and a plurality of positioning screws are connected between the annular main housing and the middle connecting ring frame and the annular upper sealing plate, and are fixedly connected into one body through the plurality of positioning screws;

[0005] An arc detector interface and a plurality of cable connection ports are fixedly installed inside the annular main housing;

[0006] A plurality of positioning sleeve rods are fixedly installed at the bottom of the annular upper sealing plate, an inner sliding rod is slidably installed inside the positioning sleeve rod, a support spring is fixedly installed between one end of the inner sliding rod located inside the positioning sleeve rod and the inside of the positioning sleeve rod, and an arc-shaped pressing rod is fixedly installed at the end of the inner sliding rod away from the positioning sleeve rod, and the arc-shaped pressing rod is used to press down the high-voltage cable penetrating into the annular main housing.

[0007] Preferably, a plurality of limiting holes are penetrated inside the middle connecting ring frame, and a plurality of threaded holes adapted to the limiting holes are symmetrically opened on the top surface of the annular main housing, so that the positioning screw can pass through the limiting holes and then be connected to the threaded holes.

[0008] Preferably, sealing sheets are fixedly installed between the middle connecting ring frame and the annular main housing, and between the annular upper sealing plate and the middle connecting ring frame.

[0009] Preferably, through holes are symmetrically opened inside the annular main housing and the middle connecting ring frame, and the installation position of the arc-shaped positioning frame is located outside the corresponding through holes.

[0010] Preferably, an arc-shaped surface is opened inside the through hole opened inside the annular main housing, and a plurality of spherical bodies are rotatably connected inside the arc-shaped surface.

[0011] Preferably, a plurality of grounding blocks are fixedly installed inside the annular main housing.

[0012] Preferably, arc-shaped positioning frames are fixedly installed on the outer sides of the annular main housing and the middle connecting ring frame, and the installation positions of the upper and lower arc-shaped positioning frames correspond to each other, for limiting the high-voltage cable.

[0013] Preferably, a plurality of elastic sealing plates are fixedly installed inside the arc-shaped positioning frame. The elastic sealing plates are used to deform when stressed when contacting the high-voltage cable, and seal between the arc-shaped positioning frame and the high-voltage cable.

[0014] Preferably, the installation height of the arc-shaped positioning frame is flush with the installation height of the cable connection port.

[0015] Preferably, positioning ears are fixedly installed on the outer side of the arc-shaped positioning frame, and positioning bolts are fixedly installed inside the positioning ears.

[0016] The present invention provides an explosion-proof high-voltage cable junction box. Compared with the prior art, it has the following beneficial effects:

[0017] (1) For this explosion-proof high-voltage cable junction box, through the cooperation of the annular main housing and the middle connecting ring frame, it is convenient to disassemble the junction box, effectively improving the assembly convenience of the high-voltage cable. At the same time, through the cooperation of the inner sliding rod and the arc-shaped pressing rod, when assembling the high-voltage cable, the high-voltage cable can be pressed down. When in use, through the cooperation of the inner sliding rod and the positioning sleeve rod, the force received by the end of the high-voltage cable can be buffered, further improving the use safety and connection stability of the high-voltage cable.

[0018] (2) The explosion-proof high-voltage cable terminal box, through the settings of the arc-shaped positioning frame and the elastic sealing plate, when assembling the high-voltage cable, the elastic sealing plate can contact the outer surface of the high-voltage cable, and through the combination of the two arc-shaped positioning frames, the elastic sealing plate can be deformed under pressure to wrap the high-voltage cable. On the one hand, it can be applicable to the assembly process of high-voltage cables with different diameters, and at the same time, it can complete the limit and sealing of the high-voltage cable, further improving the use stability and applicable range of the high-voltage cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 is a schematic sectional view structure diagram;

[0021] Figure 3 For the present invention Figure 2 is a schematic front view structure diagram;

[0022] Figure 4 For the present invention Figure 3 is an enlarged structure diagram at A in the present invention;

[0023] Figure 5 is a schematic sectional view structure diagram of the middle connecting ring frame and the annular upper sealing plate of the present invention;

[0024] Figure 6 For the present invention Figure 5 is an enlarged structure diagram at B in the present invention;

[0025] Figure 7 is a schematic structure diagram of the annular main housing and the middle connecting ring frame of the present invention;

[0026] Figure 8 For the present invention Figure 7 is a schematic explosion structure diagram.

[0027] In the figure: 1, annular main housing; 101, positioning flange; 2, middle connecting ring frame; 201, limiting hole; 3, annular upper sealing plate; 4, positioning screw; 5, arc-shaped positioning frame; 501, positioning ear; 502, positioning bolt; 6, sealing piece; 7, elastic sealing plate; 8, grounding block; 9, positioning sleeve rod; 901, support spring; 10, inner sliding rod; 1001, arc-shaped pressing rod; 11, through hole; 1101, arc-shaped surface; 1102, spherical body; 12, arc detector interface; 13, cable connection port. DETAILED DESCRIPTION OF THE INVENTION

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-8 , the present invention provides two technical solutions, specifically including the following embodiments:

[0030] Embodiment 1:

[0031] In the embodiment of the present invention, specifically, an explosion-proof high-voltage cable terminal box includes an annular main housing 1. A positioning flange 101 is fixedly installed on the outer side of the annular main housing 1. A middle connection ring frame 2 and an annular upper sealing plate 3 are respectively installed above the annular main housing 1. A plurality of positioning screws 4 are connected between the annular main housing 1 and the middle connection ring frame 2 and the annular upper sealing plate 3, and are fixedly connected into one body through the plurality of positioning screws 4;

[0032] In the embodiment of the present invention, specifically, the positioning flange 101 is used to assemble the annular main housing 1;

[0033] In the embodiment of the present invention, specifically, an arc detector interface 12 and a plurality of cable connection ports 13 are fixedly installed inside the annular main housing 1;

[0034] In the embodiment of the present invention, specifically, when assembling the high-voltage cable, first separate the annular main housing 1 from the middle connection ring frame 2 and the annular upper sealing plate 3 by rotating the positioning screw 4, then connect the high-voltage cable to the corresponding cable connection port 13 in sequence, and then install the middle connection ring frame 2 and the annular upper sealing plate 3 to the annular main housing 1 in sequence, and complete the positioning of the annular main housing 1 between the middle connection ring frame 2 and the annular upper sealing plate 3 through the plurality of positioning screws 4, so as to facilitate the disassembly and assembly operation of the high-voltage cable;

[0035] In the embodiment of the present invention, specifically, a plurality of positioning sleeve rods 9 are fixedly installed at the bottom of the annular upper sealing plate 3. An inner sliding rod 10 is slidably installed inside the positioning sleeve rod 9. A support spring 901 is fixedly installed between one end of the inner sliding rod 10 located inside the positioning sleeve rod 9 and the inside of the positioning sleeve rod 9. An arc-shaped pressing rod 1001 is fixedly installed at the end of the inner sliding rod 10 away from the positioning sleeve rod 9. The arc-shaped pressing rod 1001 is used to press down the high-voltage cable penetrating into the annular main housing 1;

[0036] In an embodiment of the present invention, specifically, after the high-voltage cable is connected to the corresponding cable connection port 13, as the middle connection ring frame 2 and the annular upper sealing plate 3 are installed on the annular main housing 1, the arc-shaped pressing rod 1001 at the end of the inner sliding rod 10 can be brought into contact with the corresponding high-voltage cable. As the annular upper sealing plate 3 is pressed down, the high-voltage cable can be pressed down through the cooperation of the positioning sleeve rod 9, the inner sliding rod 10, and the arc-shaped pressing rod 1001. Thus, when the device is in use and the high-voltage cable is stressed, the inner sliding rod 10 and the arc-shaped pressing rod 1001 can be stressed and move upward, enabling the inner sliding rod 10 to slide inside the positioning sleeve rod 9 and compress the support spring 901, effectively improving the use safety and connection stability of the high-voltage cable;

[0037] In an embodiment of the present invention, specifically, a plurality of limiting holes 201 are penetrated through the middle connection ring frame 2, and a plurality of threaded holes adapted to the limiting holes 201 are symmetrically opened on the top surface of the annular main housing 1 for enabling the positioning screw 4 to pass through the limiting holes 201 and then be connected to the threaded holes;

[0038] In an embodiment of the present invention, the threaded holes are not shown in the figure and are used to fix the annular upper sealing plate 3 and the middle connection ring frame 2 to the annular main housing 1 by screwing the positioning screw 4;

[0039] In an embodiment of the present invention, specifically, sealing sheets 6 are fixedly installed between the middle connection ring frame 2 and the annular main housing 1 and between the annular upper sealing plate 3 and the middle connection ring frame 2. Through the arrangement of the sealing sheets 6, the sealing performance between the middle connection ring frame 2 and the annular main housing 1 and between the annular upper sealing plate 3 and the middle connection ring frame 2 can be further improved;

[0040] In an embodiment of the present invention, further, through holes 11 are symmetrically opened inside the annular main housing 1 and the middle connection ring frame 2, and the installation position of the arc-shaped positioning frame 5 is located outside the corresponding through holes 11;

[0041] In an embodiment of the present invention, an arc-shaped surface 1101 is opened inside the through hole 11 opened in the annular main housing 1, and a plurality of spherical bodies 1102 are rotatably connected inside the arc-shaped surface 1101;

[0042] In an embodiment of the present invention, when the high-voltage cable moves downward under the pressure of the arc-shaped pressing rod 1001 during assembly and when the high-voltage cable moves back and forth under stress during use, it can contact the plurality of spherical bodies 1102 inside the arc-shaped surface 1101, further improving the protection effect on the high-voltage cable;

[0043] In an embodiment of the present invention, further, a plurality of grounding blocks 8 are fixedly installed inside the annular main housing 1. Through the arrangement of the grounding blocks 8, the current generated by internal discharge of the device can be introduced into the ground to ensure the use safety of the device;

[0044] In an embodiment of the present invention, further, arc-shaped positioning frames 5 are fixedly installed on the outer sides of the annular main housing 1 and the middle connecting ring frame 2, and the installation positions of the arc-shaped positioning frames 5 on the upper and lower sides correspond to each other for limiting the high-voltage cable.

[0045] In an embodiment of the present invention, the installation height of the arc-shaped positioning frame 5 is flush with the installation height of the cable connection port 13.

[0046] In an embodiment of the present invention, a positioning ear 501 is fixedly installed on the outer side of the arc-shaped positioning frame 5, and a positioning bolt 502 is fixedly installed inside the positioning ear 501.

[0047] Embodiment 2: Based on Embodiment 1, a high-voltage cable junction box for explosion-proof use includes an annular main housing 1. A positioning flange 101 is fixedly installed on the outer side of the annular main housing 1. A middle connecting ring frame 2 and an annular upper sealing plate 3 are respectively installed above the annular main housing 1. A plurality of positioning screws 4 are connected between the annular main housing 1 and the middle connecting ring frame 2 and the annular upper sealing plate 3, and are fixedly connected into one body through the plurality of positioning screws 4.

[0048] In an embodiment of the present invention, specifically, the positioning flange 101 is used to assemble the annular main housing 1.

[0049] In an embodiment of the present invention, specifically, an arc detector interface 12 and a plurality of cable connection ports 13 are fixedly installed inside the annular main housing 1.

[0050] In an embodiment of the present invention, specifically, when assembling the high-voltage cable, first separate the annular main housing 1 from the middle connecting ring frame 2 and the annular upper sealing plate 3 by rotating the positioning screws 4, then connect the high-voltage cable to the corresponding cable connection port 13 in sequence, and then install the middle connecting ring frame 2 and the annular upper sealing plate 3 to the annular main housing 1 in sequence, and complete the positioning of the annular main housing 1 between the middle connecting ring frame 2 and the annular upper sealing plate 3 through the plurality of positioning screws 4, thereby facilitating the disassembly and assembly operations of the high-voltage cable.

[0051] In an embodiment of the present invention, specifically, a plurality of positioning sleeve rods 9 are fixedly installed at the bottom of the annular upper sealing plate 3. An inner sliding rod 10 is slidably installed inside the positioning sleeve rod 9. A support spring 901 is fixedly installed between one end of the inner sliding rod 10 located inside the positioning sleeve rod 9 and the inside of the positioning sleeve rod 9. An arc-shaped pressing rod 1001 is fixedly installed at the end of the inner sliding rod 10 away from the positioning sleeve rod 9. The arc-shaped pressing rod 1001 is used to press down the high-voltage cable penetrating into the annular main housing 1.

[0052] In an embodiment of the present invention, specifically, after the high-voltage cable is connected to the corresponding cable connection port 13, as the middle connection ring frame 2 and the annular upper sealing plate 3 are installed on the annular main housing 1, the arc-shaped pressing rod 1001 at the end of the inner sliding rod 10 can be brought into contact with the corresponding high-voltage cable. As the annular upper sealing plate 3 is pressed down, the high-voltage cable can be pressed down through the cooperation of the positioning sleeve rod 9, the inner sliding rod 10, and the arc-shaped pressing rod 1001. Thus, when the device is in use and the high-voltage cable is stressed, the inner sliding rod 10 and the arc-shaped pressing rod 1001 can be stressed and move upward, enabling the inner sliding rod 10 to slide inside the positioning sleeve rod 9 and compress the support spring 901, effectively improving the use safety and connection stability of the high-voltage cable;

[0053] In an embodiment of the present invention, specifically, a plurality of limiting holes 201 are formed through the middle connection ring frame 2, and a plurality of threaded holes adapted to the limiting holes 201 are symmetrically formed on the top surface of the annular main housing 1 for enabling the positioning screw 4 to pass through the limiting holes 201 and then be connected to the threaded holes;

[0054] In an embodiment of the present invention, the threaded holes are not shown in the figure and are used to fix the annular upper sealing plate 3 and the middle connection ring frame 2 to the annular main housing 1 by screwing the positioning screw 4;

[0055] In an embodiment of the present invention, specifically, sealing sheets 6 are fixedly installed between the middle connection ring frame 2 and the annular main housing 1 and between the annular upper sealing plate 3 and the middle connection ring frame 2. Through the arrangement of the sealing sheets 6, the sealing performance between the middle connection ring frame 2 and the annular main housing 1 and between the annular upper sealing plate 3 and the middle connection ring frame 2 can be further improved;

[0056] In an embodiment of the present invention, further, through holes 11 are symmetrically formed inside the annular main housing 1 and the middle connection ring frame 2, and the installation position of the arc-shaped positioning frame 5 is located outside the corresponding through holes 11;

[0057] In an embodiment of the present invention, an arc-shaped surface 1101 is formed inside the through hole 11 formed in the annular main housing 1, and a plurality of spherical bodies 1102 are rotatably connected inside the arc-shaped surface 1101;

[0058] In an embodiment of the present invention, when the high-voltage cable is pressed down by the pressure of the arc-shaped pressing rod 1001 during assembly and when the high-voltage cable moves back and forth under stress during use, it can come into contact with the plurality of spherical bodies 1102 inside the arc-shaped surface 1101, further improving the protection effect on the high-voltage cable;

[0059] In an embodiment of the present invention, further, a plurality of grounding blocks 8 are fixedly installed inside the annular main housing 1. Through the arrangement of the grounding blocks 8, the current generated by internal discharge of the device can be introduced into the ground to ensure the use safety of the device;

[0060] In an embodiment of the present invention, further, arc-shaped positioning frames 5 are fixedly installed on the outer sides of the annular main housing 1 and the middle connecting ring frame 2, and the installation positions of the arc-shaped positioning frames 5 on the upper and lower sides correspond to each other for limiting the high-voltage cable.

[0061] In an embodiment of the present invention, a plurality of elastic sealing plates 7 are fixedly installed inside the arc-shaped positioning frame 5. The elastic sealing plates 7 are used to deform under force when contacting the high-voltage cable to seal between the arc-shaped positioning frame 5 and the high-voltage cable.

[0062] In an embodiment of the present invention, the installation height of the arc-shaped positioning frame 5 is flush with the installation height of the cable connection port 13.

[0063] In an embodiment of the present invention, a positioning ear 501 is fixedly installed on the outer side of the arc-shaped positioning frame 5, and a positioning bolt 502 is fixedly installed inside the positioning ear 501.

[0064] In an embodiment of the present invention, through the setting of the arc-shaped positioning frame 5 and the elastic sealing plate 7, when assembling the high-voltage cable, the elastic sealing plate 7 can contact the outer surface of the high-voltage cable, and through the combination of the two arc-shaped positioning frames 5, the elastic sealing plate 7 can be deformed under pressure to wrap the high-voltage cable. On the one hand, it can be suitable for assembling high-voltage cables with different diameters, and at the same time, it can complete the limiting and sealing of the high-voltage cable, further improving the sealing performance and use stability of the high-voltage cable.

[0065] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0066] The above has described in detail an embodiment of the present invention, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the present invention.

Claims

1. An explosion-proof high-voltage cable junction box, comprising an annular main housing (1), a positioning flange (101) being fixedly mounted on the outer side of the annular main housing (1), characterized in that: A middle connecting ring frame (2) and an annular upper sealing plate (3) are respectively installed above the annular main shell (1); a plurality of positioning screws (4) are connected between the annular main shell (1), the middle connecting ring frame (2) and the annular upper sealing plate (3), and the annular main shell (1) is fixedly connected as a whole by the plurality of positioning screws (4); An arc detector interface (12) and a plurality of cable connection ports (13) are fixedly installed inside the annular main housing (1); A plurality of positioning sleeves (9) are fixedly mounted on the bottom of the annular upper sealing plate (3); an inner sliding rod (10) is slidably mounted inside the positioning sleeve (9); a support spring (901) is fixedly mounted between one end of the inner sliding rod (10) located inside the positioning sleeve (9) and the inside of the positioning sleeve (9); an arc-shaped pressure rod (1001) is fixedly mounted on one end of the inner sliding rod (10) away from the positioning sleeve (9); the arc-shaped pressure rod (1001) is used to press down a high-voltage cable that has penetrated into the annular main shell (1).

2. The explosion-proof high-voltage cable junction box according to claim 1, characterized in that: The middle connecting ring frame (2) is provided with a plurality of limiting holes (201) extending therethrough, and the top surface of the annular main shell (1) is provided with a plurality of threaded holes symmetrically matched with the limiting holes (201) so as to allow the positioning screw (4) to pass through the limiting holes (201) and then be connected to the threaded holes.

3. The explosion-proof high-voltage cable junction box according to claim 1, characterized in that: A sealing sheet (6) is fixedly installed between the middle connecting ring frame (2) and the annular main shell (1), and between the annular upper sealing plate (3) and the middle connecting ring frame (2).

4. The explosion-proof high-voltage cable junction box according to claim 1, characterized in that: The annular main shell (1) and the middle connecting ring frame (2) are both symmetrically provided with through holes (11), and the installation position of the arc-shaped positioning frame (5) is located outside the corresponding through holes (11).

5. The explosion-proof high-voltage cable junction box according to claim 4, characterized in that: An arc surface (1101) is provided on the inner side of the through hole (11) provided inside the annular main shell (1), and a plurality of spherical bodies (1102) are rotatably connected inside the arc surface (1101).

6. The explosion-proof high-voltage cable junction box according to claim 1, characterized in that: A plurality of grounding blocks (8) are fixedly installed inside the annular main housing (1).

7. The explosion-proof high-voltage cable junction box according to claim 1, characterized in that: The outer sides of the annular main housing (1) and the middle connecting ring frame (2) are both fixedly mounted with arc-shaped positioning frames (5), and the installation positions of the arc-shaped positioning frames (5) on the upper and lower sides correspond to each other, so as to limit the position of the high-voltage cable.

8. The explosion-proof high-voltage cable junction box according to claim 7, characterized in that: A plurality of elastic sealing plates (7) are fixedly mounted inside the arc-shaped positioning frame (5), and the elastic sealing plates (7) are used to deform under force when in contact with the high-voltage cable, thereby sealing between the arc-shaped positioning frame (5) and the high-voltage cable.

9. The explosion-proof high-voltage cable junction box according to claim 7, characterized in that: The installation height of the arc-shaped positioning frame (5) is kept flush with the installation height of the cable connection port (13).

10. The explosion-proof high-voltage cable junction box according to claim 1, characterized in that: A positioning ear (501) is fixedly mounted on the outer side of the arc-shaped positioning frame (5), and a positioning bolt (502) is fixedly mounted inside the positioning ear (501).

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