A fireproof power metering box

Abstract

This invention belongs to the field of metering box technology, specifically a fireproof energy metering box. It includes a metering box body, a moisture-proof mechanism located on the upper right side wall of the metering box body, and a pressure relief mechanism located on top of the moisture-proof mechanism. The pressure relief mechanism includes a shell, with a limiting plate fixedly connected inside the shell. A ball groove with a tube groove is formed at the center of the limiting plate. A blocking ball is placed on top of the limiting plate, and the blocking ball is adapted to the ball groove. A connecting rod is fixedly connected to the top of the blocking ball, and a fixing spring is connected to the top of the connecting rod. During heat dissipation, the airflow pushes the blocking ball upwards, allowing heat to escape through the louvers. In case of fire, the blocking plate closes, and the fixing spring pushes the blocking ball downwards to block the ball groove. When the internal pressure is too high, the airflow pushes the blocking ball upwards, achieving pressure relief inside the metering box and solving the problem of increased pressure and explosion risk during a fire.

Description

Technical Field

[0001] This invention belongs to the field of metering box technology, specifically a fireproof electrical energy metering box. Background Technology

[0002] A metering box is a collection of metering instruments and auxiliary equipment necessary for measuring electrical energy. It includes electricity meters, voltage and current transformers and their secondary circuits, electricity metering panels, cabinets, boxes, etc. Metering boxes can be installed in a suspended or floor-mounted manner. To ensure installation quality, the suspended box must be fixed with built-in expansion bolts. The bolt size must meet the requirements of safety and firmness and outdoor installation conditions.

[0003] In the existing technology, a fireproof power metering box with publication number CN116316124A allows for the use of fire-extinguishing dry powder to extinguish fires on electrical components below when the thin rope is burned through, thus achieving timely fire suppression and effectively controlling the spread of fire; it also improves the overall fire resistance of the box and ensures safety. However, it still has the following problems:

[0004] The aforementioned metering box uses fire extinguishing dry powder to extinguish fires when the thin rope is burned through. However, when a fire starts inside the metering box, the internal temperature rises and the internal pressure increases, posing a risk of explosion. Furthermore, the thin rope is prone to brittleness and breakage after prolonged use, which can cause the fire extinguishing box to open even when it is not on fire, thus activating its internal electronic components.

[0005] Therefore, a fireproof power metering box is proposed to address the above problems. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies and solve the problems of increased pressure in the metering box during fire, which poses an explosion risk, and the thin rope easily becoming brittle and breaking, causing the fire extinguisher box to open prematurely and affecting the operation of internal electronic components, a fireproof power metering box is proposed.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: a fireproof power metering box, comprising a metering box body, a moisture-proof mechanism located above the right side wall of the metering box body, and a pressure relief mechanism located at the top of the moisture-proof mechanism. The pressure relief mechanism includes a shell, a limiting plate fixedly connected inside the shell, a ball groove with a tube groove opened at the center of the limiting plate, a blocking ball placed on the top of the limiting plate, the blocking ball being adapted to the ball groove, a connecting rod fixedly connected to the top of the blocking ball, a fixing spring connected to the top of the connecting rod, the connecting rod being elastically connected to the shell through the fixing spring, louvers connected to both sides above the outer wall of the shell, and a waterproof top fixedly connected to the top of the shell, the waterproof top being conical.

[0010] Preferably, the metering box body includes a box body, a box door is movably connected to the front of the box body, a fire extinguisher box placement slot is provided on the top of the box body, and guide grooves are provided on both sides of the fire extinguisher box placement slot.

[0011] Preferably, a fire extinguishing mechanism is provided on the inner top of the metering box body. The fire extinguishing mechanism includes a fire extinguishing box, which is placed inside the fire extinguishing box placement slot. Guide sliders adapted to guide slides are fixedly connected to both the left and right sides of the fire extinguishing box. Toothed grooves are opened on the opposite side of the two guide sliders. Movable plates are movably connected to both the left and right sides of the bottom of the fire extinguishing box. Fixed bases are fixedly connected to the opposite side of the two movable plates.

[0012] Preferably, a pull rod is slidably connected to the left side of the fixed base on the left side, a magnet is fixedly connected to the left side of the pull rod, an electromagnet is magnetically connected to the left side of the magnet, a thermal sensor is fixedly connected to the bottom of the movable plate on the left side, a movable plug is fixedly connected to the right side of the pull rod, a support spring is sleeved on the outside of the pull rod, and the movable plug is elastically connected to the fixed base through the support spring.

[0013] Preferably, the upper and lower outer walls of the movable plug are movably connected with adjusting rods, and the upper and lower sides of the fixed base on the right side are provided with insertion holes. The right side of the adjusting rod is movably connected with a limiting rod that matches the insertion hole.

[0014] Preferably, the outer wall of the fire extinguishing mechanism is provided with an installation mechanism, which includes two fixed gears. The two fixed gears are meshed on opposite sides of the tooth grooves. Locking blocks are meshed on opposite sides of the two fixed gears. Locking screws are movably connected to opposite sides of the two locking blocks. Rotary handles are fixedly connected to opposite sides of the two locking screws.

[0015] Preferably, a heat dissipation mechanism is provided at the bottom of the main body of the metering box. The heat dissipation mechanism includes a heat dissipation box, which is fixedly connected to the bottom of the main body of the metering box. Several air inlets are provided at the front of the heat dissipation box, and a fixing plate is fixedly connected inside the heat dissipation box. Several exhaust vents are provided inside the fixing plate.

[0016] Preferably, a first sprocket is provided on the left side of the bottom of the fixed plate. The first sprocket is fixedly connected to the output end of the first motor via a shaft. A transmission chain is meshed with the outside of the first sprocket. A second sprocket is meshed with the right side of the transmission chain. The first sprocket and the second sprocket are chain-driven. Heat dissipation fins are fixedly connected to the top of both the first sprocket and the second sprocket via shafts. A supporting top plate is fixedly connected to the top of the heat dissipation box. A fireproof filter is fixedly connected to the middle of the supporting top plate.

[0017] Preferably, the top of the heat dissipation mechanism is connected to a barrier mechanism, which includes two barrier plates. The two barrier plates are slidably connected to the left and right sides of the supporting top plate, respectively. A supporting slide rod is fixedly connected to the opposite side of each of the two barrier plates. A sliding sleeve block is slidably connected to the front and rear sides of the outer wall of each supporting slide rod. A movable rod is movably connected to the opposite side of each of the two sliding sleeve blocks. The two movable rods are arranged crosswise and movably connected. A lead screw sleeve block is movably connected to the opposite side of each of the movable rods. The same bidirectional lead screw is threaded into the internal threads of the two lead screw sleeve blocks. The rear of the left bidirectional lead screw is fixedly connected to the output end of the second motor. A first bevel gear is fixedly connected to the front of each bidirectional lead screw. A second bevel gear is meshed with the left side of each first bevel gear. The same drive shaft is fixedly connected inside the two second bevel gears.

[0018] Preferably, the moisture-proof mechanism includes a moisture-proof box, which is fixedly connected to the left side of the outer wall of the box body. The top of the moisture-proof box is fixedly connected to the outer shell. A desiccant placement box is slidably connected to the bottom of the inside of the moisture-proof box. Several through holes are opened on the inner wall of the moisture-proof box.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the present invention provides a fireproof power metering box, which has the following beneficial effects:

[0021] 1. When the present invention dissipates heat, the airflow blows the baffle ball upward, allowing heat to be discharged through the louvers. When a fire occurs, the baffle plate closes, and the baffle ball is pushed downward by the fixed spring to block the ball groove. When the internal pressure is too high, the airflow pushes the baffle ball upward, thereby realizing the pressure relief treatment inside the metering box and solving the problem of the metering box increasing pressure and posing an explosion risk when it catches fire.

[0022] 2. This invention uses a second motor to control two movable rods to move closer together, pushing the barrier plates on both sides to close and seal the inside of the metering box, preventing oxygen from entering. High temperature triggers a thermal sensor, de-energizing the electromagnet. A support spring controls the limit rod to leave the insertion hole. Under the action of gravity, the fire extinguishing dry powder presses the two movable plates to rotate, allowing the fire extinguishing dry powder to be sprinkled into the metering box for fire extinguishing. This solves the problem that using thin ropes can easily become brittle and break, causing the fire extinguishing box to open prematurely and affecting the operation of internal electronic components.

[0023] 3. This invention pushes the fire extinguisher box into the fire extinguisher box placement slot, and controls the locking block to mesh with the fixed gear through the rotating handle, thereby realizing the installation and fixation of the fire extinguisher box. The first motor controls the heat dissipation fins on both sides to rotate together, blowing external air into the interior and carrying away the heat of the electronic components through the louvers, thus realizing heat dissipation inside the metering box and solving the problems of fire extinguisher box installation and heat dissipation of the metering box. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the internal structure of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the fire extinguishing mechanism of the present invention;

[0028] Figure 4 This is a three-dimensional structural diagram of the installation mechanism of the present invention;

[0029] Figure 5 This is a three-dimensional structural diagram of the heat dissipation mechanism of the present invention;

[0030] Figure 6 This is a three-dimensional structural schematic diagram of the pressure relief mechanism of the present invention;

[0031] Figure 7 This is the present invention. Figure 4 A magnified view of the structure at point A in the middle;

[0032] Figure 8 This is the present invention. Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0033] Figure 9 This is the present invention. Figure 5 A magnified schematic diagram of the structure at point C.

[0034] In the picture:

[0035] 1. Metering box body; 101. Box body; 102. Box door; 103. Fire extinguisher box placement slot;

[0036] 2. Fire extinguishing mechanism; 201. Fire extinguishing box; 202. Guide slider; 203. Gear groove; 204. Movable plate; 205. Fixed base; 206. Pull rod; 207. Magnet block; 208. Electromagnet; 209. Thermal sensor; 2010. Movable insert; 2011. Support spring; 2012. Adjusting rod; 2013. Limiting rod;

[0037] 3. Mounting mechanism; 301. Fixed gear; 302. Locking block; 303. Locking screw; 304. Rotary handle;

[0038] 4. Heat dissipation mechanism; 401. Heat dissipation box; 402. Air inlet; 403. Fixing plate; 404. First sprocket; 405. First motor; 406. Transmission chain; 407. Second sprocket; 408. Heat dissipation blades; 409. Support top plate; 4010. Fireproof filter screen;

[0039] 5. Barrier mechanism; 501. Barrier plate; 502. Support slide rod; 503. Sliding sleeve block; 504. Movable rod; 505. Two-way lead screw; 506. Lead screw sleeve block; 507. Second motor; 508. First bevel gear; 509. Second bevel gear; 5010. Drive shaft;

[0040] 6. Moisture-proof mechanism; 601. Moisture-proof box; 602. Desiccant placement box; 603. Through hole;

[0041] 7. Pressure relief mechanism; 701. Housing; 702. Barrier ball; 703. Connecting rod; 704. Fixing spring; 705. Louver; 706. Waterproof roof. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Specific implementation examples are given below.

[0044] Please see Figures 1-9The present invention provides a fireproof power metering box, including a metering box body 1, a moisture-proof mechanism 6 located above the right side wall of the metering box body 1, and a pressure relief mechanism 7 located at the top of the moisture-proof mechanism 6. A fire extinguishing mechanism 2 is provided at the inner top of the metering box body 1, an installation mechanism 3 is provided on the outer wall of the fire extinguishing mechanism 2, a heat dissipation mechanism 4 is provided at the inner bottom of the metering box body 1, and a barrier mechanism 5 is connected to the top of the heat dissipation mechanism 4.

[0045] like Figure 1 ... Figure 2 , Figure 3 , Figure 4 and Figure 7 Figure 8 As shown, the metering box body 1 includes a box body 101, a box door 102 movably connected to the front of the box body 101, a fire extinguisher box placement slot 103 opened on the top of the box body 101, and guide grooves opened on both sides of the fire extinguisher box placement slot 103. A fire extinguishing mechanism 2 is provided inside the top of the metering box body 1. The fire extinguishing mechanism 2 includes a fire extinguisher box 201, which is placed inside the fire extinguisher box placement slot 103. Guide sliders 202 adapted to the guide grooves are fixedly connected to both the left and right sides of the fire extinguisher box 201. The two guide sliders 202 have toothed grooves 203 on the opposite side. Movable plates 204 are movably connected to both the left and right sides of the bottom of the fire extinguisher box 201. Fixed bases 205 are fixedly connected to the opposite side of the two movable plates 204. A pull rod 206 is slidably connected to the left side of the left fixed base 205. A magnet 207 is fixedly connected to the left side of the pull rod 206. An electromagnet 208 is magnetically connected to the left side of the magnet 207. A thermal sensor 209 is fixedly connected to the bottom of the left movable plate 204. A movable plug 2010 is fixedly connected to the right side of the pull rod 206. A support spring 2011 is sleeved on the outside of the pull rod 206. The movable plug 2010 is elastically connected to the fixed base 205 through the support spring 2011. Adjusting rods 2012 are movably connected to the outer walls of the upper and lower sides of the movable plug 2010. Insertion holes are opened on the upper and lower sides of the inside of the right fixed base 205. A limiting plug 2013 that matches the insertion hole is movably connected to the right side of the adjusting rod 2012.

[0046] Through the above scheme: when a fire occurs, the high temperature triggers the thermal sensor 209, causing the electromagnet 208 to be de-energized. Since the movable plug 2010 is elastically connected to the fixed base 205 through the support spring 2011, under the elastic force of the support spring 2011, the movable plug 2010 is pushed to the right. Since the upper and lower outer walls of the movable plug 2010 are movably connected to the adjusting rods 2012, under the action of the adjusting rods 2012, the limiting plug 2013 is moved away from the plug hole. Thus, under the action of gravity, the fire extinguishing dry powder presses the two movable plates 204 to rotate, thereby causing the fire extinguishing dry powder to fall into the metering box for fire extinguishing.

[0047] like Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the mounting mechanism 3 includes two fixed gears 301, both of which are meshed on the opposite side of the tooth groove 203. Both fixed gears 301 are meshed on the opposite side of the two fixed gears 301 and are connected to locking blocks 302. Both locking blocks 302 are movably connected to locking screws 303 on the opposite side of the two locking screws 303 and are fixedly connected to handles 304 on the opposite side of the two locking screws 303.

[0048] The above method involves pushing the fire extinguisher box 201 into the fire extinguisher box placement slot 103, rotating the handle 304 to drive the locking screw 303 to rotate, and under the action of the thread, pushing the locking block 302 to mesh and fix with the fixed gear 301, thereby installing and fixing the fire extinguisher box 201.

[0049] like Figure 1 , Figure 2 , Figure 5 and Figure 9 As shown, a heat dissipation mechanism 4 is provided at the bottom of the main body 1 of the metering box. The heat dissipation mechanism 4 includes a heat dissipation box 401, which is fixedly connected to the bottom of the main body 1 of the metering box. Several air inlets 402 are provided at the front of the heat dissipation box 401. A fixing plate 403 is fixedly connected inside the heat dissipation box 401. Several exhaust ports are provided inside the fixing plate 403. A first sprocket 404 is provided on the left side of the bottom of the fixing plate 403. The first sprocket 404 is connected to the first motor 405 via a shaft. The output end is fixedly connected. The external part of the first sprocket 404 is meshed with a transmission chain 406. The right side of the transmission chain 406 is meshed with a second sprocket 407. The first sprocket 404 is chain driven by the transmission chain 406 and the second sprocket 407. The top of the first sprocket 404 and the second sprocket 407 are both fixedly connected with heat dissipation blades 408 via shafts. The top of the heat dissipation box 401 is fixedly connected with a support plate 409. The middle part of the support plate 409 is fixedly connected with a fireproof filter screen 4010.

[0050] Through the above scheme: the first motor 405 starts and drives the first sprocket 404 to rotate. Since the first sprocket 404 is chain-driven with the second sprocket 407 through the transmission chain 406, under the action of friction, the transmission chain 406 pushes the second sprocket 407 to rotate synchronously, thereby driving the heat dissipation blades 408 to rotate together, blowing external air into the interior, and carrying away the heat of electronic components from the louvers 705, thus completing the internal heat dissipation.

[0051] like Figure 2 , Figure 5 and Figure 9As shown, a blocking mechanism 5 is connected to the top of the heat dissipation mechanism 4. The blocking mechanism 5 includes two blocking plates 501, which are slidably connected to the left and right sides of the supporting top plate 409, respectively. Supporting slide rods 502 are fixedly connected to the opposite side of each of the two blocking plates 501. Sliding sleeve blocks 503 are slidably connected to the front and rear sides of the outer wall of each supporting slide rod 502. Movable rods 504 are movably connected to the opposite side of each of the two sliding sleeve blocks 503. The two movable rods 504 are cross-shaped and movably connected. On the opposite side of the movable rod 504, a lead screw sleeve 506 is movably connected. The two lead screw sleeves 506 are internally threaded with the same bidirectional lead screw 505. The rear of the left bidirectional lead screw 505 is fixedly connected to the output end of the second motor 507. A first bevel gear 508 is fixedly connected to the front of each bidirectional lead screw 505. A second bevel gear 509 is meshed with the left side of each first bevel gear 508. The two second bevel gears 509 are internally fixedly connected with the same drive shaft 5010.

[0052] The above scheme works as follows: When a fire occurs, the second motor 507 starts, driving the bidirectional lead screw 505 to rotate. Under the meshing action of the gears, the first bevel gear 508 drives the second bevel gear 509 to rotate, thus causing the two bidirectional lead screws 505 to rotate together. Under the action of the threads, the lead screw sleeves 506 on both sides drive the two movable rods 504 to move closer to each other, thereby pushing the baffle plates 501 on both sides to move closer to each other and close, sealing the inside of the metering box and preventing oxygen from entering the metering box, thus performing the fire extinguishing operation.

[0053] like Figure 1 , Figure 2 and Figure 6 As shown, the moisture-proof mechanism 6 includes a moisture-proof box 601, which is fixedly connected to the left side of the outer wall of the box body 101. The top of the moisture-proof box 601 is fixedly connected to the outer shell 701. A desiccant placement box 602 is slidably connected to the bottom inside the moisture-proof box 601. Several through holes 603 are opened on the inner wall of the moisture-proof box 601.

[0054] The above method involves placing the desiccant inside the desiccant placement box 602. The moisture inside the metering box comes into contact with the desiccant through the through hole 603 via airflow, thereby drying the inside of the metering box.

[0055] like Figure 1 , Figure 2 and Figure 6As shown, the pressure relief mechanism 7 includes a housing 701. A limiting plate is fixedly connected inside the housing 701. A ball groove with a pipe groove is opened at the center of the limiting plate. A blocking ball 702 is placed on the top of the limiting plate. The blocking ball 702 is adapted to the ball groove. A connecting rod 703 is fixedly connected to the top of the blocking ball 702. A fixing spring 704 is connected to the top of the connecting rod 703. The connecting rod 703 is elastically connected to the housing 701 through the fixing spring 704. Louvers 705 are connected to both sides of the upper part of the outer wall of the housing 701. A waterproof top 706 is fixedly connected to the top of the housing 701. The waterproof top 706 is conical.

[0056] The above scheme works as follows: during heat dissipation, the airflow blows the barrier ball 702 upward, allowing heat to escape from the louver 705. In case of fire, the barrier plate 501 closes. Since the connecting rod 703 is elastically connected to the outer shell 701 through the fixing spring 704, the barrier ball 702 is pushed downward to block the ball groove under the elastic force of the fixing spring 704. When the internal pressure is too high, the barrier ball 702 is pushed upward to relieve pressure.

[0057] Working principle:

[0058] In actual use, firstly, the fire extinguisher box 201 is pushed into the fire extinguisher box placement slot 103. The locking screw 303 is rotated by the rotating handle 304, thereby pushing the locking block 302 to mesh and fix with the fixed gear 301, thus installing and fixing the fire extinguisher box 201.

[0059] Secondly, the first motor 405 starts and drives the first sprocket 404 to rotate. Under the action of friction, the transmission chain 406 pushes the second sprocket 407 to rotate synchronously, which drives the heat dissipation blades 408 to rotate together, blowing external air into the interior and carrying the heat of electronic components out through the louvers 705, thus completing the internal heat dissipation.

[0060] Next, the second motor 507 drives the bidirectional lead screw 505 to rotate. Under the meshing action of the gears, the two bidirectional lead screws 505 rotate together. Under the action of the thread, the lead screw sleeves 506 on both sides drive the two movable rods 504 to move closer to each other, thereby pushing the baffle plates 501 on both sides to move closer to each other and close, sealing the inside of the metering box and preventing oxygen from entering the metering box for fire extinguishing operation.

[0061] Then, the high temperature triggers the thermal sensor 209, which de-energizes the electromagnet 208. The support spring 2011 pushes the movable plug 2010 to the right. Under the action of the adjusting rod 2012, the limiting plug 2013 leaves the plug hole. As a result, the fire extinguishing dry powder is pressed by gravity, causing the two movable plates 204 to rotate, thus causing the fire extinguishing dry powder to fall into the metering box for fire extinguishing.

[0062] Finally, during heat dissipation, the airflow blows the baffle ball 702 upward, allowing heat to escape from the louver 705. In case of fire, the baffle plate 501 closes, and the fixed spring 704 pushes the baffle ball 702 downward to block the ball groove. When the internal pressure is too high, the baffle ball 702 is pushed upward to relieve pressure.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A fireproof power metering box, comprising a metering box body (1), a moisture-proof mechanism (6) located above the right side wall of the metering box body (1), and a pressure relief mechanism (7) located on top of the moisture-proof mechanism (6), characterized in that, The pressure relief mechanism (7) includes a housing (701), a limiting plate is fixedly connected inside the housing (701), a ball groove with a pipe groove is opened at the center of the limiting plate, a blocking ball (702) is placed on the top of the limiting plate, the blocking ball (702) is adapted to the ball groove, a connecting rod (703) is fixedly connected to the top of the blocking ball (702), a fixing spring (704) is connected to the top of the connecting rod (703), the connecting rod (703) is elastically connected to the housing (701) through the fixing spring (704), louvers (705) are connected to both sides of the upper part of the outer wall of the housing (701), and a waterproof top (706) is fixedly connected to the top of the housing (701), the waterproof top (706) is conical; The bottom of the metering box body (1) is provided with a heat dissipation mechanism (4). The heat dissipation mechanism (4) includes a heat dissipation box (401). The heat dissipation box (401) is fixedly connected to the bottom of the metering box body (1). Several air inlets (402) are opened in front of the heat dissipation box (401). A fixing plate (403) is fixedly connected inside the heat dissipation box (401). Several exhaust vents are opened inside the fixing plate (403). The top of the heat dissipation mechanism (4) is connected to a barrier mechanism (5). The barrier mechanism (5) includes two barrier plates (501). The two barrier plates (501) are slidably connected to the left and right sides of the supporting top plate (409). Supporting slide rods (502) are fixedly connected to the opposite sides of the two barrier plates (501). Sliding sleeve blocks (503) are slidably connected to the front and rear sides of the outer wall of each supporting slide rod (502). Movable rods (504) are movably connected to the opposite sides of the two sliding sleeve blocks (503). The two movable rods (504) are cross-shaped and movably connected. Each of the movable rods (504) is movably connected to a lead screw sleeve (506) on one side facing away from the other. The two lead screw sleeves (506) are internally threaded with the same bidirectional lead screw (505). The rear of the left bidirectional lead screw (505) is fixedly connected to the output end of the second motor (507). A first bevel gear (508) is fixedly connected to the front of each bidirectional lead screw (505). A second bevel gear (509) is meshed with the left side of each first bevel gear (508). The two second bevel gears (509) are internally fixedly connected with the same drive shaft (5010).

2. The fireproof power metering box according to claim 1, characterized in that: The metering box body (1) includes a box body (101), a box door (102) is movably connected to the front of the box body (101), a fire extinguishing box placement slot (103) is opened on the top of the box body (101), and guide grooves are opened on both sides of the fire extinguishing box placement slot (103).

3. A fireproof power metering box according to claim 1, characterized in that: The metering box body (1) is provided with a fire extinguishing mechanism (2) at the top inside. The fire extinguishing mechanism (2) includes a fire extinguishing box (201). The fire extinguishing box (201) is placed inside the fire extinguishing box placement slot (103). The left and right sides of the fire extinguishing box (201) are fixedly connected with guide sliders (202) that are adapted to guide slides. The two guide sliders (202) have toothed grooves (203) on the opposite side. The left and right sides of the bottom of the fire extinguishing box (201) are movably connected with movable plates (204). The two movable plates (204) are fixedly connected with fixed bases (205) on the opposite side.

4. A fireproof power metering box according to claim 3, characterized in that: A pull rod (206) is slidably connected to the left side of the fixed base (205) on the left side. A magnet (207) is fixedly connected to the left side of the pull rod (206). An electromagnet (208) is magnetically connected to the left side of the magnet (207). A thermal sensor (209) is fixedly connected to the bottom of the movable plate (204) on the left side. A movable plug (2010) is fixedly connected to the right side of the pull rod (206). A support spring (2011) is sleeved on the outside of the pull rod (206). The movable plug (2010) is elastically connected to the fixed base (205) through the support spring (2011).

5. A fireproof power metering box according to claim 4, characterized in that: The upper and lower outer walls of the movable plug (2010) are movably connected with adjusting rods (2012). The upper and lower sides of the fixed base (205) on the right side are provided with insertion holes. The right side of the adjusting rod (2012) is movably connected with a limiting rod (2013) that matches the insertion hole.

6. A fireproof power metering box according to claim 3, characterized in that: The fire extinguishing mechanism (2) is provided with an installation mechanism (3) on its outer wall. The installation mechanism (3) includes two fixed gears (301). The two fixed gears (301) are meshed and connected to the opposite side of the tooth groove (203). The opposite side of the two fixed gears (301) is meshed and connected to a locking block (302). The opposite side of the two locking blocks (302) is movably connected to a locking screw (303). The opposite side of the two locking screws (303) is fixedly connected to a handle (304).

7. A fireproof power metering box according to claim 1, characterized in that: A first sprocket (404) is provided on the left side of the bottom of the fixed plate (403). The first sprocket (404) is fixedly connected to the output end of the first motor (405) via a shaft. A transmission chain (406) is meshed with the outside of the first sprocket (404). A second sprocket (407) is meshed with the right side of the transmission chain (406). The first sprocket (404) and the second sprocket (407) are chain driven by the transmission chain (406). Heat dissipation blades (408) are fixedly connected to the top of the first sprocket (404) and the second sprocket (407) via a shaft. A support plate (409) is fixedly connected to the top of the heat dissipation box (401). A fireproof filter (4010) is fixedly connected to the middle of the support plate (409).

8. A fireproof power metering box according to claim 2, characterized in that: The moisture-proof mechanism (6) includes a moisture-proof box (601), which is fixedly connected to the left side of the outer wall of the box body (101). The top of the moisture-proof box (601) is fixedly connected to the outer shell (701). A desiccant placement box (602) is slidably connected to the bottom inside the moisture-proof box (601). Several through holes (603) are opened on the inner wall of the moisture-proof box (601).

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