Monitoring flame-retardant embedded protection box for circuit protector

Abstract

The invention discloses a monitoring flame-retardant embedded protective box for a circuit protector, and relates to the technical field of embedded protective boxes for circuit protectors, the monitoring flame-retardant embedded protective box comprises a cabinet body, one end face of the cabinet body is open and is hinged with a cabinet door, the bottom end of the cabinet body is fixedly connected with a ventilation box, one end face of the ventilation box is provided with a rectangular port, and a ventilation assembly is inserted in the rectangular port. A plurality of first wiring holes are symmetrically formed in the two sides of the ventilation box, first heat shrink tubes extending into the inner wall of the ventilation box are fixedly connected to the inner walls of the first wiring holes, a fireproof layer is attached to the inner wall of the cabinet body, and internal thread cylinders are arranged at the four corners of the face, opposite to the cabinet door, of the inner wall of the cabinet body in a protruding mode; through cooperation of the ventilation holes of the ventilation plate and the fireproof gauze element, air circulation is facilitated, impurities are blocked, the heat dissipation efficiency is improved, and then the function of cooling the circuit protector can be achieved; finally, the problems that a circuit protector is easy to burn due to the fact that heat dissipation conditions of an existing embedded protection box are limited, a ventilation opening lacks an effective sealing structure, fire cannot be extinguished rapidly, and flames spread through wiring holes easily are solved, and safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit protector embedded protection box, and particularly relates to a monitoring and flame-retardant embedded protection box for circuit protector. BACKGROUND

[0002] The circuit protector plays an important role in preventing circuit overload, short circuit and other faults in the power system, and its stable operation is directly related to the safety of the power system. Since the circuit protector is often in a complex environment, it is easily affected by dust, water vapor, external force collision and other factors, which may cause poor contact, performance degradation or even damage of the circuit protector, and further cause circuit failure. Therefore, a special protection box needs to be provided for the circuit protector to form a physical barrier to isolate external interference and provide a relatively stable operating environment for the circuit protector, so as to ensure reliable operation of the circuit protector and prolong its service life. Although the embedded protection box can save installation space and better integrate with the surrounding environment, in actual application, the embedded installation of the protection box limits the heat dissipation condition of the protection box, and the internal heat is not easy to dissipate, which may cause short circuit of the circuit protector due to high temperature and further cause combustion. The ventilation opening of the existing embedded protection box often lacks effective sealing structure and is in a constant open state. When the circuit protector fails and causes a fire, the unsealed ventilation opening will continuously introduce external air to provide sufficient oxygen for the flame, causing the fire to spread rapidly and making it difficult to extinguish the fire, which greatly increases the risk of fire expansion and poses a serious threat to the safety of the power system and the surrounding environment. Therefore, the present application designs a monitoring and flame-retardant embedded protection box for circuit protector to solve the above problems. SUMMARY

[0003] The present application aims at solving the problems in the prior art and provides a monitoring and flame-retardant embedded protection box for circuit protector.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a monitoring and flame-retardant embedded protection box for circuit protector, comprising a cabinet body, one end face of the cabinet body is open and is hingedly connected with a cabinet door, a ventilation box is fixedly connected to the bottom end of the cabinet body, a rectangular ventilation opening is formed in one end face of the ventilation box, a ventilation assembly is inserted into the rectangular ventilation opening, a plurality of first wire routing holes are symmetrically formed in the two sides of the ventilation box, a first heat shrink tube is fixedly connected to the inner wall of the ventilation box and extends into the inner wall of the ventilation box, a fireproof layer is attached to the inner wall of the cabinet body, internal thread cylinders are protrudingly arranged at the four corners of the opposite faces of the inner wall of the cabinet body and the cabinet door, a base plate is fixedly connected to one end of the internal thread cylinder through bolts, a plurality of wire slot boxes are arranged in a rectangular shape on the end face of the base plate away from the cabinet body, a slide rail for mounting the circuit protector is fixedly connected to the base plate through bolts, a plurality of second wire routing holes are formed in the inner bottom face of the cabinet body, and a sealing assembly is mounted at the second wire routing hole.

[0005] Preferably, the ventilation assembly comprises a ventilation plate, a plurality of ventilation holes are equidistantly formed on the ventilation plate, a fireproof screen is fixedly connected in the ventilation hole, a partition plate is fixedly connected to the inner wall of the ventilation box at the upper and lower ends of the ventilation plate, a sliding strip is slidably arranged between the gap between the partition plate and the ventilation plate, a plurality of sealing plates are equidistantly fixed between the opposite faces of the two sliding strips and are arranged in a staggered manner with the ventilation holes, and a heat expansion rubber strip is fixed between the opposite faces of the sealing plate and the ventilation plate.

[0006] Preferably, the outer wall of the ventilation plate is fixedly connected with a mounting frame, a sealing rubber pad is fixedly connected to the outer wall of the mounting frame and abuts against the inner wall of the rectangular opening, one end of the sliding strip is fixedly connected with a pull-back spring, one end of the pull-back spring is fixedly connected with the inner wall of the mounting frame, a plurality of limiting baffle plates are equidistantly fixed between the opposite faces of the two partition plates and are located on one side of the ventilation hole, a pin hole coaxially arranged is formed at one end of the opposite faces of the partition plate and the sliding strip, a hot melt pin is inserted into the pin hole, and the hot melt pin is located in the melting section between the pin holes of the partition plate and the sliding strip.

[0007] Preferably, the sealing assembly comprises a combined pipe inserted into the second wiring hole, a collection ring table is fixedly connected to the inner bottom surface of the cabinet at the second wiring hole, a magnetic attraction hoop ring is provided on the outer wall of the combined pipe and is clamped at the inner bottom surface of the collection ring table, a sleeve pipe is fixedly connected to the bottom surface of the cabinet at the second wiring hole, a supporting ring is fixedly connected to the bottom end of the sleeve pipe, and the bottom end of the combined pipe abuts against the top surface of the supporting ring.

[0008] Preferably, the pipe body of the combined pipe inside the cabinet is a melting pipe, and the pipe body of the combined pipe inside the sleeve pipe is a second heat shrinkable pipe.

[0009] Preferably, a fire barrier ring is installed on the inner wall of the first wiring hole section, an installation ring is fixedly connected to one end of the fire barrier ring, a plurality of installation plates are fixedly connected to the circumferential side of the installation ring, and the installation plates are fixedly connected to the outer wall of the cabinet by bolts.

[0010] Preferably, a temperature sensor is installed at a position on the inner top surface of the cabinet, a control panel connected with the temperature sensor through internal wiring is installed on the cabinet door, and a fireproof partition plate is fixedly connected to the opposite faces of the cabinet door and the cabinet.

[0011] Compared with the prior art, the present application has the beneficial effects that: through the cooperation of the ventilation hole of the ventilation plate and the fireproof screen, the present application facilitates air circulation and blocks impurities, improves the heat dissipation efficiency, and thus can realize the function of cooling the circuit protector; through the cooperation of the slide bar, the sealing plate, the hot melt plug and the pull-back spring, the ventilation opening can be quickly closed at high temperature, the fire extinguishing speed is improved, and thus the function of blocking oxygen can be realized; through the effect of the combination pipe, the upper end of the second wire hole is blocked by the melted pipe under the heat, and the lower end of the second heat shrink tube shrinks to wrap the circuit to prevent downward burning, which facilitates the comprehensive prevention of flame spreading along the wire hole, improves the targeting of fire retardation, and thus the function of blocking the flame spreading path can be realized; through the effect of the fire blocking ring, the gap in the first heat shrink tube is blocked by the fire blocking ring under the heat, which facilitates the blocking of the flame spreading through the first wire hole, improves the comprehensiveness of fire retardation, and thus the function of omnidirectional limiting of fire spread can be realized; finally, the problems of easy burning of the circuit protector, lack of effective sealing structure of the ventilation opening, and easy spreading of the flame through the wire hole are solved, and the safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 The overall structure schematic diagram of the present application is shown in the figure; Figure 2 The overall structure schematic diagram of the present application is shown in the figure; Figure 3 The overall structure schematic diagram of the present application is shown in the figure; Figure 4 The overall structure schematic diagram of the present application is shown in the figure; Figure 5 The overall structure schematic diagram of the present application is shown in the figure; Figure 6 The overall structure schematic diagram of the present application is shown in the figure; Figure 7 The overall structure schematic diagram of the present application is shown in the figure.

[0013] In the figure, the serial number is: 1, cabinet body; 2, cabinet door; 3, ventilation box; 4, first heat shrink tube; 5, fireproof layer; 6, base plate; 7, wire slot box; 8, slide rail; 9, ventilation plate; 10, fireproof screen; 11, partition plate; 12, sealing plate; 13, pull-back spring; 14, hot melt plug; 15, combination pipe; 16, collection ring table; 17, magnetic attraction hoop ring; 18, sleeve pipe; 19, fire blocking ring; 20, temperature sensor; 21, control panel; 22, fire retardant partition. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0015] Embodiment: refer to Figures 1 to 7 The monitoring fire-retardant embedded protection box for a circuit protector comprises a cabinet body 1, an opening is formed in one end surface of the cabinet body 1, and a cabinet door 2 is hingedly connected to the cabinet body 1; a ventilation box 3 is fixedly connected to the bottom end of the cabinet body 1; a rectangular opening is formed in one end surface of the ventilation box 3, and a ventilation assembly is inserted into the rectangular opening; a plurality of first wiring holes are symmetrically formed in the two sides of the ventilation box 3, and a first heat shrink tube 4 is fixedly connected to the inner wall of the ventilation box 3 and extends into the inner wall of the ventilation box 3; a fireproof layer 5 is attached to the inner wall of the cabinet body 1; internally threaded cylinders are protrudingly arranged at the four corners of the opposite surface of the inner wall of the cabinet body 1 and the cabinet door 2; a base plate 6 is fixedly connected to one end of the internally threaded cylinders through bolts; a plurality of wire slot boxes 7 are arranged in a rectangular shape on the end surface of the base plate 6, which is away from the opening of the cabinet body 1; slide rails 8 for mounting the circuit protector are fixedly connected to the base plate 6 through bolts; a plurality of second wiring holes are formed in the inner bottom surface of the cabinet body 1, and sealing assemblies are mounted at the second wiring holes; the fireproof layer 5 is formed by brushing expansion fireproof paint, and can expand to form a fireproof and heat insulation layer at high temperature; the slide rails 8 are made of aluminum alloy, the slide rails 8 made of the aluminum alloy facilitate quick mounting and dismounting of the circuit protector, and have light weight and high strength, thereby improving the maintenance efficiency; and the above-mentioned structure cooperates to form a basic frame of the device, thereby providing a basic structure for mounting and protecting the circuit protector.

[0016] In the application, the ventilation assembly comprises a ventilation plate 9, a plurality of ventilation holes are equidistantly formed on the ventilation plate 9, a fireproof screen 10 is fixedly connected in the ventilation hole, a partition plate 11 is fixedly connected to the upper and lower ends of the ventilation plate 9, a sliding strip is slidably arranged between the gap between the partition plate 11 and the ventilation plate 9, a plurality of sealing plates 12 are equidistantly fixedly connected between the opposite faces of the two sliding strips and are arranged in a staggered manner with the ventilation holes, and a ring of thermal expansion adhesive tape is fixedly connected between the opposite faces of the sealing plate 12 and the ventilation plate 9; the fireproof screen 10 is made of glass fiber material and has good fireproof performance and air permeability; the thermal expansion adhesive tape is made of EPDM material and can rapidly expand and seal the gap at high temperature; through the above structure, the ventilation hole cooperates with the fireproof screen 10 to realize effective ventilation and fireproofing, the sealing plate 12 cooperates with the thermal expansion adhesive tape to prepare for sealing in case of fire, and the functionality of the device is improved; the outer wall of the ventilation plate 9 is fixedly connected with a mounting frame, the outer wall of the mounting frame is fixedly connected with a sealing rubber pad abutting against the inner wall of the rectangular through hole, one end of the sliding strip is fixedly connected with a pull-back spring 13, one end of the pull-back spring 13 is fixedly connected with the inner wall of the mounting frame, a plurality of limiting baffle plates are equidistantly fixedly connected between the opposite faces of the two partition plates 11 and are located on one side of the ventilation hole, coaxially arranged pin holes are formed at one end of the opposite faces of the partition plate 11 and the sliding strip, a hot melt pin 14 is inserted into the pin hole, and the fusible section of the hot melt pin 14 located between the pin hole gaps of the partition plate 11 and the sliding strip is a fusible section; the sealing rubber pad is made of nitrile rubber material and has good sealing performance and aging resistance; the pull-back spring 13 is a cylindrical coil spring and has moderate elasticity; the fusible section of the hot melt pin 14 is made of a low-melting-point alloy material with a melting point of 120℃ and can be timely melted and broken at the initial stage of fire; through the above structure, the sealing rubber pad ensures the sealing performance of the ventilation assembly after installation, the pull-back spring 13 cooperates with the hot melt pin 14 to realize automatic closing of the sealing plate 12 in case of fire, and the response speed of the device is improved.

[0017] In the application, the sealing assembly comprises a combined pipe 15 inserted into the second wire hole, a collection ring table 16 fixed to the inner bottom surface of the cabinet body 1 at the second wire hole, a magnetic clamp ring 17 clamped to the outer wall of the combined pipe 15 at the inner bottom surface of the collection ring table 16, a sleeve 18 fixed to the bottom surface of the cabinet body 1 at the second wire hole, a support ring fixed to the bottom end of the sleeve 18, and the bottom end of the combined pipe 15 abutting against the top surface of the support ring. The collection ring table 16 is made of aluminum alloy, which is smooth and easy to clean. The magnetic clamp ring 17 has magnets only on the abutting surfaces of the two rings, and the body is not a magnet, which can stably clamp and fix the combined pipe 15 through magnetic force. The sleeve 18 is made of PVC, which has good insulation and flame retardance. Through the above structure, the collection ring table 16 can collect the molten material, the magnetic clamp ring 17 and the sleeve 18 cooperate to realize the stable installation of the combined pipe 15, and the reliability of the device is improved. The pipe body of the combined pipe 15 inside the cabinet body 1 is a melting pipe, and the pipe body of the combined pipe 15 inside the sleeve 18 is a second heat shrink tube. The melting pipe is made of polyethylene material, and the melting point is 100 DEG C, which is easy to melt under heat. The second heat shrink tube is made of polyolefin material, which can tightly wrap the wire. Through the above structure, the melting pipe and the second heat shrink tube cooperate to realize the bidirectional plugging of the second wire hole, prevent the upward and downward spread of the flame, and improve the flame retardant effect.

[0018] In the application, the first heat shrink tube 4 is provided with a fire barrier ring 19 installed on the inner wall of the first wire hole section, one end of the fire barrier ring 19 is fixedly connected with a mounting ring, a plurality of mounting plates are fixedly connected with the circumferential side of the mounting ring, and the mounting plates are fixedly connected with the outer wall of the cabinet body 1 through bolts. The fire barrier ring 19 is made of flame-retardant expanded core material, which rapidly expands and plugs the first wire hole when encountering flame. The mounting ring is made of Q235 steel material, which has high strength and is convenient for fixing the fire barrier ring 19. Through the above structure, the fire barrier ring 19 can rapidly expand and plug the first wire hole under high temperature, prevent the flame from passing through, and improve the fire safety of the device. A temperature sensor 20 is installed on the inner top surface of the cabinet body 1, a control panel 21 connected with the temperature sensor 20 through internal wire is installed on the cabinet door 2, and a flame-retardant partition plate 22 is fixedly connected with the opposite surfaces of the cabinet door 2 and the cabinet body 1. The temperature sensor 20 is of TW-BCD-9005A type, which has high measurement accuracy. The control panel 21 is a single-chip microcomputer control panel with LCD display, which can display the temperature in real time and give early warning. The flame-retardant partition plate 22 is made of phenolic resin plate material, which has a V0-level flame retardant grade. Through the above structure, the temperature sensor 20 and the control panel 21 cooperate to realize the real-time monitoring and early warning of the internal temperature, and the flame-retardant partition plate 22 further enhances the fireproof capability of the cabinet door 2, and improves the monitoring and protection level of the device.

[0019] Working principle: In the embodiment, the application further provides a use method of the monitoring flame-retardant embedded protection box for circuit protector, which comprises the following steps: Step one, normal ventilation and heat dissipation: the ventilation holes of the ventilation plate 9 in the ventilation assembly are kept unblocked, external air enters the cabinet body 1 inside the protective box through the ventilation holes, and the fire-resistant screen 10 blocks the entry of external dust and other impurities, thereby achieving heat dissipation and cooling of the circuit protector and maintaining its normal working temperature; Step two, ventilation hole closure in case of fire: when a fire occurs in the cabinet body 1, causing the temperature to rise, the fusible section of the hot-melt plug 14 melts, the return spring 13 loses its constraint and pulls the sliding bar to move, the sliding bar drives the sealing plate 12 to move close to the ventilation plate 9 until the sealing plate 12 completely covers the ventilation holes, and the heat-expanding adhesive strip expands to fill the gap between the sealing plate 12 and the ventilation plate 9, thereby quickly closing the ventilation holes to block the entry of external oxygen; Step three, second wiring hole plugging: when a fire occurs, the melting pipe inside the cabinet body 1 melts, and the flowing molten material plugs the second wiring hole at the upper end; the upper end of the second heat-shrinkable tube is fixed to the inner wall of the sleeve 18, and when it shrinks upon heating, it not only tightly wraps the wire passing through to prevent the flame from burning downward along the wire, but also plugs the bottom end of the second wiring hole, preventing the melted melting pipe from flowing directly downward, and completely blocking the path of the flame spreading through the second wiring hole; Step four, first wiring hole fire blocking: when the fire spreads to the first wiring hole, the fire-blocking ring 19 on the inner wall of the first heat-shrinkable tube 4 expands upon heating, quickly filling the gap inside the first heat-shrinkable tube 4, forming a tight seal, blocking the flame from spreading outside the cabinet body 1 through the first wiring hole, and enhancing the overall fire-retardant effect; Step five, temperature monitoring and feedback: the temperature sensor 20 on the top surface of the cabinet body 1 monitors the internal temperature in real time, and when the temperature abnormally rises, it transmits a signal to the control panel 21 on the cabinet door 2, which displays the temperature abnormality information, allowing the staff to promptly detect faults and take countermeasures, thereby improving the safety of the protective box.

[0020] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent substitutions or changes within the technical scope disclosed by the present application according to the technical solution and inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A monitoring fire-retardant embedded protective cabinet for circuit protector, comprising a cabinet body (1), characterized in that: The one end surface of the cabinet body (1) is open, and the cabinet door (2) is hinged, the bottom end of the cabinet body (1) is fixedly connected with the ventilation box (3), one end surface of the ventilation box (3) is provided with a rectangular opening, the ventilation assembly is inserted into the rectangular opening, a plurality of first wiring holes are symmetrically formed on the both sides of the ventilation box (3), the first heat shrink tube (4) is fixedly connected with the inner wall of the ventilation box (3), the inner wall of the cabinet body (1) is attached with the fireproof layer (5), the inner wall of the cabinet body (1) and the opposite surface of the cabinet door (2) are provided with internally threaded cylinders at the four corners, one end of the internally threaded cylinder is fixedly connected with the base plate (6) through bolts, a plurality of wire slot boxes (7) are arranged in a rectangular shape on the one end surface of the base plate (6) facing the opening of the cabinet body (1), the base plate (6) is fixedly connected with the slide rail (8) for installing the circuit protector through bolts, a plurality of second wiring holes are formed on the inner bottom surface of the cabinet body (1), and the sealing assembly is installed at the second wiring hole.

2. A monitoring flame-retardant embedded protective box for circuit protector according to claim 1, characterized in that: The ventilation assembly comprises a ventilation plate (9), a plurality of ventilation holes are equidistantly formed on the ventilation plate (9), the fireproof screen (10) is fixedly connected in the ventilation hole, the partition plate (11) is fixedly connected with the inner wall of the ventilation box (3) at the upper and lower ends of the ventilation plate (9), the sliding strip is slidably installed between the gap between the partition plate (11) and the ventilation plate (9), a plurality of sealing plates (12) are equidistantly fixed between the opposite surfaces of the two sliding strips and are arranged in a staggered manner with the ventilation holes, and a ring of thermal expansion adhesive tape is fixedly connected between the opposite surfaces of the sealing plate (12) and the ventilation plate (9).

3. A monitoring flame-retardant embedded protective box for a circuit protector according to claim 2, characterized in that: The mounting frame is fixedly connected with the outer wall of the ventilation plate (9), the sealing rubber pad is fixedly connected with the outer wall of the mounting frame and abuts against the inner wall of the rectangular opening, one end of the sliding strip is fixedly connected with the back pull spring (13), one end of the back pull spring (13) is fixedly connected with the inner wall of the mounting frame, a plurality of limiting baffle plates are equidistantly fixed between the opposite surfaces of the two partition plates (11) and are located on one side of the ventilation hole, the pin hole is coaxially formed at one end of the opposite surfaces of the partition plate (11) and the sliding strip, the hot melt pin (14) is inserted into the pin hole, and the hot melt pin (14) is located in the melting section between the pin hole gaps of the partition plate (11) and the sliding strip.

4. A monitoring flame-retardant embedded protective box for a circuit protector according to claim 1, characterized in that: The sealing assembly comprises a combined pipe (15) inserted into the second wiring hole, the collecting ring table (16) is fixedly connected with the inner bottom surface of the cabinet body (1) at the second wiring hole, the magnetic attraction hoop ring (17) is provided on the outer wall of the combined pipe (15) and is clamped on the inner bottom surface of the collecting ring table (16), the sleeve pipe (18) is fixedly connected with the bottom surface of the cabinet body (1) at the second wiring hole, the sleeve pipe (18) is fixedly connected with the supporting ring at the bottom end, and the bottom end of the combined pipe (15) abuts against the top surface of the supporting ring.

5. A monitoring flame-retardant embedded protective box for a circuit protector according to claim 4, characterized in that: The pipe body of the combined pipe (15) located in the cabinet body (1) is a melting pipe, and the pipe body of the combined pipe (15) located in the sleeve pipe (18) is a second heat shrink tube.

6. A monitoring flame-retardant embedded protective box for a circuit protector according to claim 1, characterized in that: The fire barrier ring (19) is installed on the inner wall of the first wiring hole section of the first heat shrink tube (4), one end of the fire barrier ring (19) is fixedly connected with the mounting ring, a plurality of mounting plates are fixedly connected with the circumference of the mounting ring, and the mounting plates are fixedly connected with the outer wall of the cabinet body (1) through bolts.

7. A monitoring flame-retardant embedded protective box for a circuit protector according to claim 1, characterized in that: The temperature sensor (20) is installed on one position of the inner top surface of the cabinet body (1), the control panel (21) connected with the temperature sensor (20) through internal wiring is installed on the cabinet door (2), and the fireproof partition plate (22) is fixedly connected on the opposite surface of the cabinet door (2) and the cabinet body (1).

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