Outdoor metering box protection device

Abstract

The invention belongs to the technical field of electric power, and discloses an outdoor metering box protection device which comprises a metering box shell, a protection cover installed on the back face of the metering box shell, a door plate hinged to the metering box shell, an air inlet assembly, an air outlet assembly and an air outlet assembly. The air inlet assembly is arranged in the metering box shell and the protective cover; and the cable protection assembly is arranged on the air inlet assembly. Electrical equipment is installed in the metering box shell, after a cable penetrates through the interior of a rubber cover and is in butt joint with the electrical equipment, a door plate is closed to push an L-shaped baffle, a connecting rod and a piston rod to move in a piston cylinder, gas is injected into the rubber cover through a connecting pipe, the rubber cover is expanded to be attached to the exterior of the cable, and the cable is protected; and the phenomenon of cable damage caused by the sharp inner wall of the circular hole formed in the metering box shell is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power, and in particular relates to a protective device for an outdoor meter box. Background Art

[0002] The meter box is a combination of a combination transformer and measuring instruments and meters, including an electric energy meter, voltage and current transformers for metering and their secondary circuits, electric energy metering panels, cabinets, boxes, etc. A sealed box is added on one side of the oil tank of the combined transformer, in which measuring instruments and meters are installed, and the secondary outgoing lines of the combined transformer are connected to the wiring terminals of these instruments and meters in a prescribed manner; there is a door on the outside of the sealed box to facilitate inspection and testing of the instruments and meters therein, and protective elements can also be installed for protection as needed. At present, outdoor meter boxes usually need to be connected to cables, and a circular hole is opened on the outside of the meter box for the cable to enter, but most of the existing meter boxes are made of metal, and the circular hole is not provided with a cable protection structure, resulting in a sharp inner wall of the circular hole opened in the meter box. The cable enters the meter box through the circular hole and contacts the inner wall of the circular hole. The cable will be cut if it contacts the inner wall of the circular hole for a long time, resulting in cable damage, which poses certain safety hazards. Therefore, a protective device for outdoor meter boxes is proposed. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides an outdoor meter box protection device, which solves the problem that the inner wall of the circular hole opened in the existing meter box is relatively sharp, and the cable will be cut when in contact with the inner wall of the circular hole for a long time, causing the cable to be damaged.

[0004] To achieve the above object, the present invention provides the following technical solution: an outdoor meter box protection device, comprising a meter box housing, a protective cover installed on the back of the meter box housing, a door panel hinged on the meter box housing, a seal is formed between the door panel and the meter box housing, and further comprising:

[0005] An air intake assembly, the air intake assembly being installed inside the metering box housing and the protective cover;

[0006] A cable protection assembly, wherein the cable protection assembly is arranged on the air intake assembly;

[0007] A transmission assembly, the transmission assembly is installed inside the meter box housing and the protective cover;

[0008] A heat dissipation component, wherein the heat dissipation component is arranged on the housing of the meter box;

[0009] The air intake assembly includes a bottom plate fixedly mounted inside the metering box housing, an L-shaped baffle is movably mounted inside the metering box housing and at the bottom of the bottom plate through a stabilizing frame, and a spring is arranged between the L-shaped baffle and the protective cover;

[0010] Circular holes are provided at both ends of the bottom plate;

[0011] The cable protection assembly comprises a docking ring fixedly mounted on the bottom plate and located in the circular hole, a rubber cover is fixedly mounted on the inner wall of the docking ring, and the cable passes through the rubber cover and enters the interior of the meter box housing;

[0012] A piston cylinder is fixedly mounted on the top of the bottom plate, a piston rod is sleeved inside the piston cylinder, and one end of the piston cylinder is connected to the rubber cover through a connecting pipe;

[0013] Both ends of the bottom plate are provided with sliding grooves for one end of the piston rod to slide, the bottom of the piston rod is connected to the L-shaped baffle through a connecting rod, and one end of the piston rod is fixed with a guard plate for blocking the sliding groove;

[0014] In the initial state, one end of the bottom of the L-shaped baffle protrudes out of the interior of the metering box shell under the action of the spring, and the rubber cover is in an unexpanded state. After the cable passes through the rubber cover and docks with the equipment in the metering box shell, the door panel is closed to push the L-shaped baffle, and air is injected into the rubber cover through the piston rod and the piston cylinder.

[0015] Preferably, the air intake assembly further comprises a first air intake port provided on the bottom plate, a second air intake hole corresponding to the first air intake port is provided on the L-shaped baffle plate, a top plate is fixedly mounted on the top of the L-shaped baffle plate, and an exhaust port is provided on the top plate.

[0016] Preferably, a dustproof net is provided inside the second air inlet;

[0017] When the door panel is in an open state, the L-shaped baffle protrudes from the inside of the metering box housing under the action of the spring sheet, and the first air inlet and the second air inlet are in a misaligned state;

[0018] When the door panel is closed, the L-shaped baffle is pushed to make the first air inlet overlap with the second air inlet hole. Under the action of air extraction by the heat dissipation component, external air enters the metering box shell through the first air inlet and the second air inlet hole.

[0019] Preferably, the transmission assembly comprises a fixing frame fixedly mounted on the top of the inner wall of the metering box housing, the fixing frame is mounted with a collecting plate via a docking rod, and a kerosene glass tube is fixedly mounted between the fixing frame and the collecting plate;

[0020] A toothed plate is movably mounted on the inner wall of the protective cover, a counterweight is fixedly mounted on the bottom of the toothed plate, lugs are fixedly mounted on both sides of the toothed plate, the lugs are connected to the kerosene glass tube via a connecting rope, and a limiting wheel supporting the connecting rope is installed inside the protective cover.

[0021] Preferably, the air intake assembly also includes a transmission gear movably mounted inside the protective cover and meshing with the toothed plate, a winding wheel is fixedly mounted in the middle of the transmission gear, a rope is wound around the outside of the winding wheel, and the other end of the rope is connected to the L-shaped baffle.

[0022] Preferably, when a fire occurs in the metering box shell, the kerosene glass tube expands and breaks due to the heat, and the toothed plate moves downward under the action of the counterweight block to drive the transmission gear and the winding wheel to rotate to wind up the rope, pulling the L-shaped baffle to compress the spring sheet so that the second air inlet is misaligned with the first air inlet.

[0023] Preferably, the heat dissipation assembly includes an exhaust pipe fixedly mounted on the meter box housing, an exhaust fan is installed inside the exhaust pipe, a fourth exhaust port is opened outside the exhaust pipe, and the fourth exhaust port is located at the blade end of the exhaust fan.

[0024] Preferably, a docking plate is fixedly mounted on the top of the top plate, a sleeve is fixedly mounted on the side of the docking plate, and a third exhaust port corresponding to the fourth exhaust port is opened on the outside of the sleeve;

[0025] When the bottom of the L-shaped baffle protrudes from the inside of the metering box housing, the third exhaust port is located inside the metering box housing, and the fourth exhaust port is blocked by the sleeve;

[0026] When a fire occurs in the metering box housing, the tooth plate moves downward to pull the L-shaped baffle plate and the top plate. At this time, the third exhaust port overlaps with the fourth exhaust port, and the interior of the metering box housing is in a sealed state.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention is installed inside the housing of the meter box through the electrical equipment. After the cable passes through the inside of the rubber cover and docks with the electrical equipment, the door plate is closed to push the L-shaped baffle, the connecting rod and the piston rod move inside the piston cylinder, and the gas is injected into the rubber cover through the connecting pipe, so that the rubber cover expands and fits the outside of the cable, thereby protecting the cable and preventing the inner wall of the circular hole opened in the housing of the meter box from being sharp, which may cause the cable to be damaged.

[0029] The present invention closes the door panel, and when a fire occurs inside the metering box shell, the kerosene glass tube is ruptured by the heat, and the kerosene inside falls onto the collecting plate. After the kerosene glass tube is broken, the connecting rope and the tooth plate lose tension, and the tooth plate is driven downward by the action of the counterweight block, and the transmission gear and the winding wheel are driven to wind up the rope, pulling the L-shaped baffle plate and the top plate. After the L-shaped baffle plate is pulled, the second air inlet and the first air inlet are misaligned and non-overlapping, and the movement of the top plate drives the docking plate and the sleeve to move, and the third exhaust port is separated from the interior of the metering box shell and overlaps with the fourth exhaust port. At this time, the exhaust fan draws air through the fourth exhaust port and the third exhaust port, so that the interior of the metering box shell is in a sealed state, and fire needs oxygen to burn, thereby preventing the fire from spreading. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the back structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the matching structure of the cable protection component and the air intake component of the present invention;

[0033] Figure 4 It is a schematic diagram of the cross-sectional structure of the cable protection component and the air intake component of the present invention;

[0034] Figure 5 This is a schematic diagram of the cross-sectional structure of the meter box housing of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the meter box housing, air intake assembly, heat dissipation assembly and transmission assembly of the present invention;

[0036] Figure 7 It is a schematic diagram of the top cross-sectional structure of the transmission assembly and the heat dissipation assembly of the present invention;

[0037] Figure 8 This is a schematic diagram of the disassembled structure of the air intake assembly and the transmission assembly of the present invention;

[0038] Fig. 9 It is a schematic diagram of the cross-sectional structure of the heat dissipation component of the present invention.

[0039] In the figure: 1, metering box housing; 2, door panel; 3, cable protection assembly; 31, docking ring; 32, rubber cover; 33, connecting pipe; 34, piston cylinder; 35, piston rod; 36, slide groove; 37, guard plate; 38, connecting rod; 4, air intake assembly; 41, L-shaped baffle; 42, bottom plate; 43, first air inlet; 44, second air inlet; 45, top plate; 46, exhaust port; 47, stabilizing frame; 48, spring piece; 411. transmission gear; 412. winding wheel; 413. rope; 5. heat dissipation assembly; 51. docking plate; 52. sleeve; 53. third exhaust port; 54. fourth exhaust port; 55. exhaust pipe; 6. transmission assembly; 61. tooth plate; 62. counterweight; 63. lug; 64. connecting rope; 65. limiting wheel; 66. fixing frame; 67. docking rod; 68. collecting tray; 69. kerosene glass tube; 7. protective cover. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] like Figures 1 to 9 As shown, the present invention provides an outdoor meter box protection device, comprising a meter box housing 1, a protective cover 7 installed on the back of the meter box housing 1, a door panel 2 hinged on the meter box housing 1, a seal is formed between the door panel 2 and the meter box housing 1, and further comprising:

[0042] An air intake assembly 4, which is installed inside the metering box housing 1 and the protective cover 7;

[0043] A cable protection component 3, the cable protection component 3 is arranged on the air intake component 4;

[0044] The transmission assembly 6 is installed inside the metering box housing 1 and the protective cover 7;

[0045] A heat dissipation component 5, which is arranged on the metering box housing 1;

[0046] The air intake assembly 4 includes a bottom plate 42 fixedly mounted inside the metering box housing 1, an L-shaped baffle 41 is movably mounted inside the metering box housing 1 and at the bottom of the bottom plate 42 through a stabilizing frame 47, and a spring 48 is arranged between the L-shaped baffle 41 and the protective cover 7;

[0047] Circular holes are provided at both ends of the bottom plate 42;

[0048] The cable protection assembly 3 includes a docking ring 31 fixedly mounted on the bottom plate 42 and located in the circular hole. A rubber cover 32 is fixedly mounted on the inner wall of the docking ring 31. The cable passes through the rubber cover 32 and enters the interior of the metering box housing 1.

[0049] A piston cylinder 34 is fixedly mounted on the top of the bottom plate 42. A piston rod 35 is sleeved inside the piston cylinder 34. One end of the piston cylinder 34 is connected to the rubber cover 32 through a connecting pipe 33.

[0050] Both ends of the bottom plate 42 are provided with a slide groove 36 for one end of the piston rod 35 to slide. The bottom of the piston rod 35 is connected to the L-shaped baffle 41 through a connecting rod 38. One end of the piston rod 35 is fixed with a guard plate 37 for blocking the slide groove 36.

[0051] In the initial state, one end of the bottom of the L-shaped baffle 41 protrudes out of the interior of the metering box housing 1 under the action of the spring 48, and the rubber cover 32 is in an unexpanded state. After the cable passes through the rubber cover 32 and docks with the equipment in the metering box housing 1, the door panel 2 is closed to push the L-shaped baffle 41, and air is injected into the rubber cover 32 through the piston rod 35 and the piston cylinder 34.

[0052] When the door panel 2 is open, one end of the bottom of the L-shaped baffle 41 protrudes out of the interior of the metering box housing 1 under the action of the spring 48, and at the same time, the piston rod 35 is driven by the connecting rod 38 to move inside the piston cylinder 34 to extract air from the rubber cover 32. After the electrical equipment is installed inside the metering box housing 1, the cable passes through the rubber cover 32 and docks with the electrical equipment. Then, the door panel 2 is closed and the L-shaped baffle 41 is pushed. The connecting rod 38 and the piston rod 35 move inside the piston cylinder 34, and the gas is injected into the rubber cover 32 through the connecting pipe 33, so that the rubber cover 32 expands and fits the outside of the cable, thereby protecting the cable and avoiding the sharp inner wall of the circular hole opened in the metering box housing 1, which may cause cable damage.

[0053] like Figure 3-Figure 6 As shown, the air intake assembly 4 further includes a first air intake port 43 opened on the bottom plate 42, a second air intake hole 44 corresponding to the first air intake port 43 is opened on the L-shaped baffle plate 41, a top plate 45 is fixedly mounted on the top of the L-shaped baffle plate 41, and an exhaust port 46 is opened on the top plate 45;

[0054] A dustproof net is provided inside the second air inlet 44;

[0055] When the door panel 2 is in the open state, the L-shaped baffle 41 protrudes from the inside of the metering box housing 1 under the action of the spring 48, and the first air inlet 43 and the second air inlet 44 are in a misaligned state;

[0056] When the door panel 2 is closed, the L-shaped baffle 41 is pushed to make the first air inlet 43 overlap with the second air inlet hole 44. Under the action of the air extraction of the heat dissipation component 5, the external air enters the metering box housing 1 through the first air inlet 43 and the second air inlet hole 44.

[0057] After the connection between the cable and the electrical equipment inside the meter box housing 1 is completed, the door panel 2 is closed, the rubber cover 32 is inflated and expanded to fix and protect the cable while sealing the circular hole opened on the bottom plate 42, and the L-shaped baffle 41 moves to make the second air inlet 44 coincide with the first air inlet 43, and the heat is dissipated by exhausting air from the meter box housing 1 through the heat dissipation component 5, and the outside air enters the meter box housing 1 through the second air inlet 44 and the first air inlet 43, moves along the inner and upper part of the meter box housing 1 to take away the heat, and is discharged through the heat dissipation component 5.

[0058] like Figure 5-Figure 9 As shown, the transmission assembly 6 includes a fixing frame 66 fixedly mounted on the top of the inner wall of the metering box housing 1, the fixing frame 66 is mounted with a collecting plate 68 through a docking rod 67, and a kerosene glass tube 69 is fixedly mounted between the fixing frame 66 and the collecting plate 68;

[0059] A tooth plate 61 is movably mounted on the inner wall of the protective cover 7, a counterweight block 62 is fixedly mounted on the bottom of the tooth plate 61, lugs 63 are fixedly mounted on both sides of the tooth plate 61, and the lugs 63 are connected to the kerosene glass tube 69 through a connecting rope 64, and a limiting wheel 65 supporting the connecting rope 64 is installed inside the protective cover 7;

[0060] The air intake assembly 4 further includes a transmission gear 411 movably mounted inside the protective cover 7 and meshing with the tooth plate 61. A winding wheel 412 is fixedly mounted in the middle of the transmission gear 411. A rope 413 is wound around the outside of the winding wheel 412. The other end of the rope 413 is connected to the L-shaped baffle 41.

[0061] When a fire occurs in the metering box housing 1, the kerosene glass tube 69 expands and breaks due to the heat, and the toothed plate 61 moves downward under the action of the counterweight 62, driving the transmission gear 411 and the winding wheel 412 to rotate and wind up the rope 413, pulling the L-shaped baffle 41 to compress the spring 48 so that the second air inlet 44 is misaligned with the first air inlet 43;

[0062] The heat dissipation assembly 5 includes an exhaust pipe 55 fixedly mounted on the meter box housing 1, an exhaust fan is installed inside the exhaust pipe 55, and a fourth exhaust port 54 is opened outside the exhaust pipe 55, and the fourth exhaust port 54 is located at the blade end of the exhaust fan;

[0063] A docking plate 51 is fixedly mounted on the top of the top plate 45, a sleeve 52 is fixedly mounted on the side of the docking plate 51, and a third exhaust port 53 corresponding to the fourth exhaust port 54 is formed on the outside of the sleeve 52;

[0064] When the bottom of the L-shaped baffle 41 protrudes from the inside of the metering box housing 1, the third exhaust port 53 is located inside the metering box housing 1, and the fourth exhaust port 54 is blocked by the sleeve 52;

[0065] When a fire occurs in the metering box housing 1, the tooth plate 61 moves downward to pull the L-shaped baffle 41 and the top plate 45. At this time, the third exhaust port 53 overlaps with the fourth exhaust port 54, and the interior of the metering box housing 1 is in a sealed state.

[0066] When the door panel 2 is closed and a fire occurs inside the metering box housing 1, the kerosene glass tube 69 is ruptured by the heat and the kerosene inside falls onto the collecting plate 68. After the kerosene glass tube 69 is broken, the connecting rope 64 and the tooth plate 61 lose tension, and the tooth plate 61 is driven downward by the counterweight 62, and the transmission gear 411 and the winding wheel 412 are driven to wind up the rope 413, pulling the L-shaped baffle 41 and the top plate 45. After the L-shaped baffle 41 is pulled, the second air inlet 44 and the first air inlet 43 are misaligned and non-overlapping.

[0067] At the same time, the movement of the top plate 45 drives the docking plate 51 and the sleeve 52 to move, and the third exhaust port 53 is separated from the interior of the metering box shell 1 and coincides with the fourth exhaust port 54. At this time, the exhaust fan draws air through the fourth exhaust port 54 and the third exhaust port 53, so that the interior of the metering box shell 1 is in a sealed state. Fire requires oxygen to burn, thereby preventing the fire from spreading and reducing the combustion cost of the metering box shell 1.

[0068] The working principle and use process of the present invention:

[0069] When the door panel 2 is open, one end of the bottom of the L-shaped baffle 41 protrudes out of the metering box housing 1 under the action of the spring 48, and at the same time, the piston rod 35 is driven by the connecting rod 38 to move inside the piston cylinder 34 to extract air from the rubber cover 32, and is installed inside the metering box housing 1 through the electrical equipment. After the cable passes through the rubber cover 32 and docks with the electrical equipment, the door panel 2 is closed and the L-shaped baffle 41 is pushed. The connecting rod 38 and the piston rod 35 move inside the piston cylinder 34, and the gas is injected into the rubber cover 32 through the connecting pipe 33, so that the rubber cover 32 expands and fits the outside of the cable, protecting the cable and avoiding the sharp inner wall of the circular hole opened in the metering box housing 1, which may cause the cable to be damaged.

[0070] After the connection between the cable and the power equipment inside the meter box housing 1 is completed, the door panel 2 is closed, the rubber cover 32 is inflated and expanded to fix and protect the cable while sealing the circular hole opened on the bottom plate 42, and the L-shaped baffle 41 moves to make the second air inlet 44 coincide with the first air inlet 43, and the heat is dissipated from the meter box housing 1 through the heat dissipation component 5, and the external air enters the meter box housing 1 through the second air inlet 44 and the first air inlet 43, moves along the inner and upper part of the meter box housing 1 to take away the heat, and is discharged through the heat dissipation component 5;

[0071] When the door panel 2 is closed and a fire occurs inside the metering box housing 1, the kerosene glass tube 69 is ruptured by the heat and the kerosene inside falls onto the collecting plate 68. After the kerosene glass tube 69 is broken, the connecting rope 64 and the tooth plate 61 lose tension, and the tooth plate 61 is driven downward by the counterweight 62, and the transmission gear 411 and the winding wheel 412 are driven to wind up the rope 413, pulling the L-shaped baffle 41 and the top plate 45. After the L-shaped baffle 41 is pulled, the second air inlet 44 is misaligned with the first air inlet 43 and does not overlap.

[0072] At the same time, the movement of the top plate 45 drives the docking plate 51 and the sleeve 52 to move, and the third exhaust port 53 is separated from the interior of the metering box shell 1 and coincides with the fourth exhaust port 54. At this time, the exhaust fan draws air through the fourth exhaust port 54 and the third exhaust port 53, so that the interior of the metering box shell 1 is in a sealed state. Fire requires oxygen to burn, thereby preventing the fire from spreading and reducing the combustion cost of the metering box shell 1.

[0073] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An outdoor meter box protection device, comprising a meter box housing (1), a protective cover (7) mounted on the back of the meter box housing (1), a door panel (2) hinged to the meter box housing (1), a seal formed between the door panel (2) and the meter box housing (1), characterized in that: Also includes: An air intake assembly (4), the air intake assembly (4) being installed inside the metering box housing (1) and the protective cover (7); A cable protection component (3), wherein the cable protection component (3) is arranged on the air intake component (4); A transmission assembly (6), the transmission assembly (6) being installed inside the metering box housing (1) and the protective cover (7); A heat dissipation component (5), wherein the heat dissipation component (5) is arranged on the metering box housing (1); The air intake assembly (4) comprises a bottom plate (42) fixedly mounted inside the metering box housing (1); an L-shaped baffle (41) is movably mounted inside the metering box housing (1) and at the bottom of the bottom plate (42) via a stabilizing frame (47); and a spring sheet (48) is arranged between the L-shaped baffle (41) and the protective cover (7); The bottom plate (42) has circular holes at both ends. The cable protection assembly (3) comprises a docking ring (31) fixedly mounted on the bottom plate (42) and located in the circular hole, a rubber cover (32) fixedly mounted on the inner wall of the docking ring (31), and the cable passes through the rubber cover (32) and enters the interior of the metering box housing (1); A piston cylinder (34) is fixedly mounted on the top of the bottom plate (42), a piston rod (35) is sleeved inside the piston cylinder (34), and one end of the piston cylinder (34) is connected to the rubber cover (32) through a connecting pipe (33); Both ends of the bottom plate (42) are provided with sliding grooves (36) for one end of the piston rod (35) to slide, the bottom of the piston rod (35) is connected to the L-shaped baffle (41) through a connecting rod (38), and one end of the piston rod (35) is fixedly provided with a guard plate (37) for blocking the sliding groove (36); In the initial state, one end of the bottom of the L-shaped baffle (41) protrudes from the inside of the metering box housing (1) under the action of the spring sheet (48), and the rubber cover (32) is in an unexpanded state. After the cable passes through the rubber cover (32) and docks with the equipment in the metering box housing (1), the door panel (2) is closed to push the L-shaped baffle (41), and air is injected into the rubber cover (32) through the piston rod (35) and the piston cylinder (34).

2. The outdoor meter box protection device according to claim 1 is characterized in that: The air intake assembly (4) further comprises a first air intake port (43) provided on the bottom plate (42); a second air intake hole (44) corresponding to the first air intake port (43) is provided on the L-shaped baffle plate (41); a top plate (45) is fixedly mounted on the top of the L-shaped baffle plate (41); and an exhaust port (46) is provided on the top plate (45).

3. The outdoor meter box protection device according to claim 2 is characterized in that: A dustproof net is arranged inside the second air inlet (44); When the door panel (2) is in an open state, the L-shaped baffle (41) protrudes from the inside of the metering box housing (1) under the action of the spring sheet (48), and the first air inlet (43) and the second air inlet hole (44) are in a misaligned state; When the door panel (2) is closed, the L-shaped baffle (41) is pushed to make the first air inlet (43) overlap with the second air inlet hole (44), and under the action of the air extraction of the heat dissipation component (5), external air enters the metering box housing (1) through the first air inlet (43) and the second air inlet hole (44).

4. The outdoor meter box protection device according to claim 2 is characterized in that: The transmission assembly (6) comprises a fixing frame (66) fixedly mounted on the top of the inner wall of the metering box housing (1); the fixing frame (66) is mounted with a collecting plate (68) via a docking rod (67); a kerosene glass tube (69) is fixedly mounted between the fixing frame (66) and the collecting plate (68); A toothed plate (61) is movably mounted on the inner wall of the protective cover (7), a counterweight (62) is fixedly mounted on the bottom of the toothed plate (61), lugs (63) are fixedly mounted on both sides of the toothed plate (61), the lugs (63) are connected to the kerosene glass tube (69) via a connecting rope (64), and a limiting wheel (65) supporting the connecting rope (64) is mounted inside the protective cover (7).

5. The outdoor meter box protection device according to claim 4 is characterized in that: The air intake assembly (4) further comprises a transmission gear (411) movably mounted inside the protective cover (7) and meshing with the toothed plate (61); a winding wheel (412) is fixedly mounted in the middle of the transmission gear (411); a rope (413) is wound around the outside of the winding wheel (412); and the other end of the rope (413) is connected to the L-shaped baffle (41).

6. The outdoor meter box protection device according to claim 5 is characterized in that: When a fire occurs in the metering box housing (1), the kerosene glass tube (69) expands and breaks due to the heat, and the toothed plate (61) moves downward under the action of the counterweight (62), driving the transmission gear (411) and the winding wheel (412) to rotate and wind up the rope (413), pulling the L-shaped baffle (41) to compress the spring sheet (48) so that the second air inlet (44) is misaligned with the first air inlet (43).

7. The outdoor meter box protection device according to claim 6 is characterized in that: The heat dissipation assembly (5) comprises an exhaust pipe (55) fixedly mounted on the metering box housing (1); an exhaust fan is installed inside the exhaust pipe (55); a fourth exhaust port (54) is opened outside the exhaust pipe (55); and the fourth exhaust port (54) is located at the blade end of the exhaust fan.

8. The outdoor meter box protection device according to claim 7 is characterized in that: A docking plate (51) is fixedly mounted on the top of the top plate (45), a sleeve (52) is fixedly mounted on the side of the docking plate (51), and a third exhaust port (53) corresponding to the fourth exhaust port (54) is formed on the outside of the sleeve (52); When the bottom of the L-shaped baffle (41) protrudes from the inside of the metering box housing (1), the third exhaust port (53) is located inside the metering box housing (1), and the fourth exhaust port (54) is blocked by the sleeve (52); When a fire occurs in the metering box housing (1), the tooth plate (61) moves downward to pull the L-shaped baffle (41) and the top plate (45), and the third exhaust port (53) and the fourth exhaust port (54) overlap, and the interior of the metering box housing (1) is in a sealed state.

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