A three-phase six-wire based fireproof cable monitoring grounding box

Abstract

The application discloses a kind of fireproof cable monitoring grounding box based on three-phase six-wire type in the field of cable monitoring grounding box safety protection, including sealed box, the sealed box is equipped with the current signal of the current loop detection instrument of the current loop between acquisition cable, the sealed box is equipped with protector, the sealed box is provided with several joints;The joint nut extrudes waterproof nut on joint;The waterproof ring is placed in joint;The side of the sealed box is equipped with impact fireproof outer hanging piece, the impact fireproof outer hanging piece can release fire extinguishing ball when being impacted by external force.The impact fireproof outer hanging piece in the application releases fire extinguishing ball to extinguish fire for equipment, when impact occurs, the impact fireproof outer hanging piece can release part of fire extinguishing ball by impact and start the fire extinguishing function of fire extinguishing ball.

Description

Technical Field

[0001] This invention relates to the field of safety protection for cable monitoring grounding boxes, specifically a three-phase six-wire fireproof cable monitoring grounding box. Background Technology

[0002] Currently, existing cable monitoring grounding boxes use traditional electrical equipment boxes and have wiring terminals (terminal blocks) inside. Although the structure is simple, the protection is poor and the installation is not secure.

[0003] Based on this, electrical fires occur frequently in existing technologies, and cable monitoring grounding boxes are usually located at a certain distance from fire-fighting facilities. In the records of fires involving cable grounding boxes, equipment fires caused by deformation after impact are relatively common. Therefore, how to enable cable grounding boxes to have a certain degree of self-fire protection capability and buy time for fire rescue has become an urgent problem to be solved in the field of cable monitoring grounding box safety protection. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies, such as poor protection leading to poor installation stability and lack of fire resistance. It provides a three-phase six-wire fireproof cable monitoring grounding box. By improving the structure of the sealed box, the installation stability is enhanced. Impact-resistant fireproof external brackets are installed on the side of the sealed box. These external brackets can effectively prevent the equipment inside the sealed box from catching fire quickly after an impact, thus buying enough time for fire rescue.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] A three-phase six-wire fireproof cable monitoring and grounding box includes a sealed enclosure. A circulating current detector for collecting current signals circulating between cables is mounted on the sealed enclosure. A protector is installed inside the sealed enclosure. The protector's outlet is connected to a grounding wire. The protector is connected to a copper sleeve. A perforated assembly that engages with the copper sleeve is fitted onto the front end of the cable's copper wire. A waterproof ring is fitted onto the cable insulation layer. A waterproof nut penetrating the sealed enclosure is fitted onto the waterproof ring. A connector nut for securing the cable is provided on the sealed enclosure. The connector nut and the waterproof nut are threaded together. Several connectors are provided on the sealed enclosure. The connector nut presses the waterproof nut onto the connector. The waterproof ring is placed inside the connector.

[0007] The sides of the sealed enclosure are equipped with impact-resistant fireproof external attachments, which can release fire extinguishing balls when subjected to external impact.

[0008] This three-phase six-wire cable monitoring grounding box includes a sealed enclosure, a circulating current detector mounted on the sealed enclosure to collect the circulating current signal between cables, a protector mounted inside the sealed enclosure, a grounding wire connected to the protector's outlet for grounding, a copper sleeve connected to the protector, a perforated assembly fitted onto the front end of the cable's copper wire and secured to the copper sleeve, a waterproof ring fitted onto the cable insulation layer, a waterproof nut fitted onto the waterproof ring and penetrating the sealed enclosure, and a connector nut threaded to the waterproof nut to secure the cable to the sealed enclosure. Several connectors are located on the sealed enclosure. The connector nuts press the waterproof nut onto the connectors, and the waterproof ring is placed inside the connectors. Several anti-rotation latches are located at the front end of the waterproof nut. The connector nuts are threaded to the waterproof nuts, pressing the anti-rotation latches. The connector nuts press the waterproof nuts onto the connectors, and the waterproof rings ensure a sealed connection.

[0009] Since the protector, spline assembly, and copper bushing are electrical equipment components, they generate heat during operation. To relieve pressure within the sealed enclosure, a pressure relief valve is installed. A grounding copper bushing base is located inside the sealed enclosure, and the protector is fixed to this base with the grounding wire connected to it. Furthermore, a flat copper wire connects the protector and the copper bushing. A copper bushing mounting base is located at the bottom of the bushing.

[0010] The impact-resistant fireproof external attachment in this embodiment extinguishes fires on equipment by releasing fire extinguishing balls. When an impact occurs, the impact-resistant fireproof external attachment can release some fire extinguishing balls and activate their fire extinguishing function. If a fire occurs, the remaining fire extinguishing balls will continue to activate their fire extinguishing function under the action of heat. This embodiment miniaturizes and densifies the function of a large fire extinguishing device, enabling the fire extinguishing balls to act more effectively on the fire source, thereby making fire extinguishing smoother.

[0011] Furthermore, the front end of the waterproof nut is provided with several anti-rotation retainers; the connector nut and the waterproof nut are connected by threads and the anti-rotation retainers are pressed together.

[0012] Furthermore, a grounding copper sleeve base is provided inside the sealed box; the protector is fixed on the grounding copper sleeve base; and the grounding wire is connected to the grounding copper sleeve base.

[0013] Furthermore, a steel ball retainer groove is provided inside the copper sleeve; the plum blossom assembly includes a plum blossom contact at the front end of the copper wire of the cable, a contact spring and a spring steel ball disposed on the plum blossom contact; the spring steel ball is inserted into the steel ball retainer groove.

[0014] Furthermore, the fireproof outer casing includes a fireproof shell, one side of which is provided with an impact-breaking component and the other side with a buffer component, and the fireproof shell is filled with the fire extinguishing ball.

[0015] In this embodiment, the fireproof shell is used to hold the fire extinguishing ball. Under sufficient impact force, the fireproof shell releases the fire extinguishing ball by breaking. The impact-breaking component can break and release the fire extinguishing ball when impacted, and squeeze and puncture the fire extinguishing ball, thereby activating the fire extinguishing function of the fire extinguishing ball. The buffer component is used to prevent the sealed box from being subjected to severe impact, and to a certain extent protects the sealed box.

[0016] Furthermore, the fire extinguishing ball includes a spherical shell, inside which are provided several connecting rods, and at the center of the spherical shell is an ABC dry powder compartment. One end of each connecting rod is connected to the spherical shell, and the other end is connected to the ABC dry powder compartment. When the spherical shell deforms, the connecting rod can tear the ABC dry powder compartment.

[0017] In this embodiment, the spherical outer shell is used to house the ABC dry powder compartment. Fire extinguishing is achieved by releasing the dry powder from the ABC dry powder compartment. The connecting rod can tear the ABC dry powder compartment by deformation, thereby releasing the ABC dry powder.

[0018] Furthermore, the ABC dry powder hopper includes a vertical cylinder and a collar, the collar being sleeved outside the vertical cylinder, and a high-pressure gas tank being provided inside the vertical cylinder.

[0019] Both the vertical section and the collar section are filled with ABC dry powder fire extinguishing agent.

[0020] In this embodiment, the high-pressure gas tank inside the vertical cylinder can burst open when the vertical cylinder ruptures, thereby bursting the collar section, so that the ABC dry powder extinguishing agent in the ABC dry powder chamber can cover the cable monitoring grounding box and play a fire extinguishing function.

[0021] Furthermore, the impact-breaking assembly includes an impact plate, and the side of the impact plate near the fire extinguishing ball is provided with a plurality of spikes, which are evenly distributed on the impact plate.

[0022] In this embodiment of the application, the impact plate is used to support the spikes, which are used to puncture part of the fire extinguishing ball, thereby activating the fire extinguishing function of part of the fire extinguishing ball.

[0023] Furthermore, the buffer assembly is elastically filled, with one side of the elastic filler fixed to the sealed box and the other side in contact with the fire extinguishing ball.

[0024] The buffer component in this embodiment uses elastic filling to form a barrier between the impact-resistant fireproof outer fitting and the sealed box, so that the impact-resistant fireproof outer fitting can effectively absorb part of the impact force and reduce the impact on the sealed box.

[0025] In summary, the present invention has the following advantages compared with the prior art:

[0026] (1) The present invention provides a pressure relief valve for the sealed housing. A grounding copper sleeve base is installed inside the sealed housing, and the protector is fixed to the grounding copper sleeve base, with the grounding wire connected to the grounding copper sleeve base. Furthermore, the protector and the copper sleeve are connected by a flat copper wire. A copper sleeve mounting base is provided at the bottom of the copper sleeve.

[0027] (2) The impact fireproof external attachment in this invention extinguishes the fire on the equipment by releasing fire extinguishing balls. When an impact occurs, the impact fireproof external attachment can release part of the fire extinguishing balls and activate the fire extinguishing function of the fire extinguishing balls.

[0028] (3) In this invention, the high-pressure gas tank inside the vertical cylinder can burst open when the vertical cylinder breaks, thereby bursting the collar section, so that the ABC dry powder extinguishing agent in the ABC dry powder chamber can cover the cable monitoring grounding box and play the role of extinguishing fire. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the installation structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the impact-resistant fireproof external attachment structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the fire extinguishing ball structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the connection structure between the vertical cylinder and the collar part of the present invention;

[0034] Figure 5 This is a schematic diagram of the first angle structure after the sealing box body of the present invention has been removed;

[0035] Figure 6 This is a top view of the present invention after the sealing housing has been removed;

[0036] Figure 7 For the present invention Figure 6 Schematic diagram of the BB cross section;

[0037] Figure 8 This is a schematic diagram of the structure of the sealed housing of the present invention;

[0038] Figure 9 This is a schematic diagram of the copper sleeve in this invention;

[0039] Figure 10 This is a partial schematic diagram of the present invention.

[0040] The reference numerals in the attached diagram represent: 1. Sealed housing; 2. Circulating current detector; 3. Connector nut; 4. Waterproof nut; 5. Anti-detachment fastening mechanism; 6. Cable insulation layer; 7. Cable copper wire; 8. Impact-resistant fireproof outer fitting; 81. Fireproof outer shell; 82. Fire extinguishing ball; 821. Vertical cylinder; 822. Loop; 823. Sphere outer shell; 824. Connecting rod; 83. Impact plate; 84. Spiked nail; 85. Elastic filler; 9. Grounding wire head; 10. Grounding copper sleeve base; 11. Protector; 12. Flat copper wire; 13. Waterproof ring; 14. Copper sleeve mounting base; 15. Plum blossom contact; 16. Contact spring; 17. Copper sleeve; 18. Spring steel ball; 41. Anti-rotation bayonet; 171. Steel ball slot; 101. Connector. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0042] Example:

[0043] like Figures 1-10 As shown, in this embodiment, the three-phase six-wire cable monitoring grounding box includes a sealed box 1, a circulating current detector 2 mounted on the sealed box 1 to collect the circulating current signal between cables, a protector 11 mounted inside the sealed box 1, a grounding wire 9 connected to the outlet of the protector 11 and grounded, a copper sleeve 17 connected to the protector 11, a plum blossom assembly fitted onto the front end of the copper wire 7 of the cable and snapped into the copper sleeve 17, a waterproof ring 13 fitted onto the cable insulation layer 6, a waterproof nut 4 fitted onto the waterproof ring 13 and penetrating the sealed box 1, and a connector nut 3 threadedly connected to the waterproof nut 4 and fixing the cable to the sealed box 1. Several connectors 101 are provided on the sealed box 1, the connector nut 3 presses the waterproof nut 4 onto the connector 101, and the waterproof ring 13 is placed inside the connector 101. Here, several anti-rotation bayonets 41 are provided at the front end of the waterproof nut 4. The connector nut 3 is threadedly connected to the waterproof nut 4, and the anti-rotation bayonets 41 are pressed together. In this embodiment, the connector nut 3 presses the waterproof nut 4 onto the connector 101, and a sealed connection is achieved under the action of the waterproof ring 13.

[0044] The sides of the sealed box 1 are equipped with impact-resistant fireproof external attachments 8, which can release fire extinguishing balls 82 when subjected to external impact.

[0045] In this embodiment, the impact-resistant fireproof external attachment 8 extinguishes fires on equipment by releasing fire extinguishing balls 82. When an impact occurs, the impact-resistant fireproof external attachment 8 releases some of the fire extinguishing balls 82 and activates their fire extinguishing function. If a fire breaks out, the remaining fire extinguishing balls 82 will continue to activate their fire extinguishing function under the influence of heat. This embodiment miniaturizes and densifies the functions of a large fire extinguishing device, allowing the fire extinguishing balls 82 to act more effectively on the fire source, thus making fire extinguishing smoother. Furthermore, it can adaptively activate different numbers of fire extinguishing balls 82 according to the size of the fire, thereby preventing small fires from triggering large fire extinguishing responses. This embodiment aims to mitigate the occurrence of fires, thus buying sufficient response time for fire rescue, and does not require the ability to completely resolve all types of fires.

[0046] Since the protector 11, the plum blossom assembly, and the copper sleeve 17 are electrical equipment components, they generate heat during operation. To relieve pressure in the sealed housing 1, a pressure relief valve is installed on the sealed housing 1. A grounding copper sleeve base 10 is installed inside the sealed housing 1, and the protector 11 is fixed to the grounding copper sleeve base 10. The grounding wire 9 is connected to the grounding copper sleeve base 10. Furthermore, the protector 11 and the copper sleeve 17 are connected by a flat copper wire 12. A copper sleeve mounting base 14 is provided at the bottom of the copper sleeve 17.

[0047] In this embodiment, current transformers and voltage transformers are electrically connected to the circulating current detector 2. The current transformers are mounted on each copper wire 7 of the cable; that is, six current transformers are used in this embodiment to monitor the current of each line in real time. Additionally, the voltage transformers are connected to the grounding wire 9 for voltage detection. In this embodiment, the circulating current detector 2, current transformers, and voltage transformers are all commercially available and mature products, and will not be described in detail here.

[0048] To prevent deformation at the connection between the cable and the sealed enclosure 1 due to stress, such as when the cable is long or insufficiently supported, excessive stress at the connection could lead to damage to the cable insulation layer 6 in severe cases. Therefore, this embodiment includes an anti-detachment fastening mechanism 5 at the rear end of the waterproof nut 4. This anti-detachment fastening mechanism 5 presses against the surface of the cable insulation layer 6. In this embodiment, the anti-detachment fastening mechanism 5 provides support, distributing the stress and ensuring the reliability of the connection.

[0049] In this embodiment, to ensure the reliability and ease of electrical connection, a ball bearing slot 171 is provided within the copper sleeve 17. The sprite assembly includes a sprite contact 15 at the front end of the copper wire 7 of the cable, a contact spring 16 on the sprite contact 15, and a spring ball 18. Here, the spring ball 18 is inserted into the ball bearing slot 171.

[0050] In this embodiment, the fireproof external accessory includes a fireproof shell 81. One side of the fireproof shell 81 is provided with an impact-breaking component, and the other side is provided with a buffer component. The fireproof shell 81 is filled with the fire extinguishing ball 82.

[0051] The fire extinguishing ball 82 includes a spherical shell 823, inside which are provided several connecting rods 824. The center of the spherical shell 823 is provided with an ABC dry powder compartment. One end of the connecting rod 824 is connected to the spherical shell 823, and the other end is connected to the ABC dry powder compartment. When the spherical shell 823 is deformed, the connecting rod 824 can tear the ABC dry powder compartment.

[0052] The ABC dry powder silo includes a vertical cylinder 821 and a collar 822. The collar 822 is sleeved on the outside of the vertical cylinder 821, and a high-pressure gas tank is provided inside the vertical cylinder 821.

[0053] Both the vertical cylinder section 821 and the collar section 822 are filled with ABC dry powder fire extinguishing agent.

[0054] The impact-breaking assembly includes an impact plate 83, and the side of the impact plate 83 near the fire extinguishing ball 82 is provided with a plurality of spikes 84, which are evenly distributed on the impact plate 83.

[0055] The buffer assembly is an elastic filler 85, one side of which is fixed to the sealed box, and the other side is in contact with the fire extinguishing ball 82.

[0056] In this embodiment, when subjected to an external impact, the fireproof shell 81 deforms, and the deformed fireproof shell 81 releases fire extinguishing balls through deformation and cracking. The impact cracking component can also release fire extinguishing balls 82 through cracking. Under the action of the deformation of the fireproof shell 81, the impact cracking component activates the fire extinguishing function of some fire extinguishing balls 82 by squeezing and puncturing. If the fire is successfully extinguished, the remaining fire extinguishing balls 82 will not be activated and can be reused.

[0057] When a fire occurs and the initial fire extinguishing ball 82 is insufficient to extinguish the fire, the high-pressure gas tank inside the outer shell 823 is ruptured due to the heat generated by the ball. The impact force of the high-pressure gas tank ruptures the ABC dry powder compartment, covering the fire source with ABC dry powder extinguishing agent. The connecting rod 824 is used to support the ABC dry powder compartment, but when the outer shell 823 deforms, the connecting rod 824 can also tear the ABC dry powder compartment.

[0058] In this embodiment, the fire extinguishing ball 82 is small in size, so that its bursting will not have a significant impact on the sealed box 1. Due to its small size, the fire extinguishing ball 82 can scatter over a large area near the sealed box 1 and burst upon heating, thereby covering the fire source. Furthermore, some fire extinguishing balls 82 can be activated adaptively according to the size of the fire, thereby reducing the environmental impact.

[0059] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A three-phase six-wire fireproof cable monitoring grounding box, comprising a sealed box (1), wherein a circulating current detector (2) for collecting current signals circulating between cables is provided on the sealed box (1), a protector (11) is provided inside the sealed box (1), a grounding wire head (9) is connected to the outlet of the protector (11), a copper sleeve (17) is connected to the protector (11), a plum blossom assembly that is locked and connected to the copper sleeve (17) is provided at the front end of the copper wire (7) of the cable, a waterproof ring (13) is provided on the cable insulation layer (6), a waterproof nut (4) penetrating the sealed box (1) is provided on the waterproof ring (13), and a connector nut (3) for fixing the cable is provided on the sealed box (1), wherein the connector nut (3) and the waterproof nut (4) are connected by threads, characterized in that, The sealed box (1) is provided with several joints (101); the joint nut (3) presses the waterproof nut (4) onto the joint (101); the waterproof ring (13) is placed inside the joint (101); the sides of the sealed box (1) are provided with impact fireproof external accessories (8), which can release fire extinguishing balls (82) when subjected to external impact. in, The copper sleeve (17) is provided with a steel ball slot (171); the plum blossom assembly includes a plum blossom contact (15) provided at the front end of the copper wire (7) of the cable, a contact spring (16) and a spring steel ball (18) provided on the plum blossom contact (15); the spring steel ball (18) is inserted into the steel ball slot (171); The fireproof outer fitting includes a fireproof shell (81), one side of which is provided with an impact-breaking component and the other side with a buffer component, and the fireproof shell (81) is filled with the fire extinguishing ball (82). The fire extinguishing ball (82) includes a spherical shell (823), and a plurality of connecting rods (824) are provided inside the spherical shell (823). An ABC dry powder compartment is provided in the center of the spherical shell (823). One end of the connecting rod (824) is connected to the spherical shell (823), and the other end is connected to the ABC dry powder compartment. When the spherical shell (823) is deformed, the connecting rod (824) can tear the ABC dry powder compartment. The ABC dry powder silo includes a vertical cylinder (821) and a collar (822), the collar (822) being fitted over the vertical cylinder (821), and a high-pressure gas tank being installed inside the vertical cylinder (821); both the vertical cylinder (821) and the collar (822) are filled with ABC dry powder extinguishing agent. The impact rupture assembly includes an impact plate (83), and the side of the impact plate (83) near the fire extinguishing ball (82) is provided with a number of spikes (84), which are evenly distributed on the impact plate (83).

2. The three-phase six-wire fireproof cable monitoring grounding box according to claim 1, characterized in that, The front end of the waterproof nut (4) is provided with several anti-rotation bayonets (41); the connector nut (3) is threadedly connected to the waterproof nut (4) and presses against the anti-rotation bayonets (41).

3. The three-phase six-wire fireproof cable monitoring grounding box according to claim 1, characterized in that, A grounding copper sleeve base (10) is provided inside the sealed box (1); the protector (11) is fixed on the grounding copper sleeve base (10); the grounding wire head (9) is connected to the grounding copper sleeve base (10).

4. A three-phase six-wire fireproof cable monitoring grounding box according to claim 1, characterized in that, The buffer assembly is an elastic filler (85), one side of which is fixed to the sealed box, and the other side is in contact with the fire extinguishing ball (82).

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