An electric energy metering box with a security structure

Abstract

The present invention discloses an electric energy metering box with a security structure, comprising: a protective shell, a partition slidably arranged in the placement plate, a lifting mechanism arranged in the left baffle, a composite lock core arranged on the left baffle, and a composite key. The protective shell includes a placement plate with an opening, a left baffle and a right baffle connected to the placement plate, and a revolving door rotatably arranged on the right baffle. A limiting sleeve is arranged inside the revolving door. A storage space is formed between the partition and the closed surface of the placement plate. An ammeter and an air switch are installed in the storage space. The lifting mechanism is connected to the partition. The composite lock core includes a main lock core rotatably arranged and a secondary lock disc fixedly arranged. Through the double insurance setting, it is necessary to raise the internal partition of the box before opening the box door to access the internal electrical appliances when opening the box door.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy metering boxes, and specifically, to an electric energy metering box with a security structure. Background Art

[0002] At present, traditional electric energy metering boxes mainly use a single door lock as the main security measure. Although this door lock can play a role in preventing theft to a certain extent, in reality, due to the limitations of lock technology and the continuous progress of the technical means of lawbreakers, the possibility of a single door lock being breached is relatively high. Lawbreakers can easily open the electric energy metering box, affecting the accuracy of electric energy metering and damaging power equipment.

[0003] After retrieval, it is found that a Chinese patent with the publication number CN119595959A discloses an electric energy metering box with a security structure. This patent has a security structure, including an electric energy meter, a box body with an open front end and a door cover, and heat dissipation holes. The adjustment assembly drives the adjustment seat and the symmetrically installed adjustment plates to move up and down, flexibly adjusting the area covering the heat dissipation holes to control the heat dissipation effect. The treatment of security aspects in this patent mainly lies in its own factors to avoid the influence of heat dissipation problems on the electric energy meter. However, compared with its own reasons, the influence of external factors on electric energy metering is more serious. This patent uses a traditional single door lock and is extremely easy to be opened when facing lawbreakers, unable to ensure the accuracy of electric energy metering. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects existing in the prior art and provide an electric energy metering box with a security structure. It has a double insurance setting, and the inner partition needs to be raised before the box door can be opened to access the internal electrical appliances.

[0005] To solve the above technical problem, the technical solution of the present invention is an electric energy metering box with a security structure, including:

[0006] A protective shell, the protective shell includes a placement plate with an opening, a left baffle and a right baffle connected to the placement plate, and a revolving door rotatably arranged on the right baffle. A limiting sleeve is arranged inside the revolving door;

[0007] A partition slidably arranged in the placement plate. A storage space is formed between the partition and the closed surface of the placement plate. An electric energy meter and an air switch are installed in the storage space;

[0008] A lifting mechanism arranged in the left baffle, the lifting mechanism being connected to the partition;

[0009] A composite lock core disposed on the left baffle, the composite lock core includes a main lock core rotatably disposed and a secondary lock disc fixedly disposed, a first channel is provided in the main lock core, and a second channel is provided in the secondary lock disc;

[0010] A composite key, the composite key includes an outer key and an inner key movably disposed within the outer key, the outer key is adapted to be inserted into and rotate the main lock core to change the mating relationship between the main lock core and the limit sleeve, thereby controlling the opening and closing state of the revolving door, and the inner key is adapted to pass through the first channel and the second channel and dock with the lifting mechanism when the main lock core is rotated to a position where the first channel communicates with the second channel.

[0011] Further, the main lock core is rotatably disposed on the left baffle and passes through the left baffle, a limiting portion is provided on the main lock core outside the left baffle, when the main lock core is rotated to a position where the limiting portion is within the limit sleeve, the revolving door is in a closed state, and when the main lock core is rotated to a position where the limiting portion is outside the limit sleeve, the revolving door is in an open state;

[0012] The end face of the main lock core inside the left baffle is connected to one end of the secondary lock disc by a rotating shaft, a support plate is connected inside the left baffle, and one side of the support plate is fixedly connected to the other end of the secondary lock disc.

[0013] Further, a return spring is sleeved on the portion of the main lock core inside the left baffle, and both ends of the return spring are connected to the outer peripheral surface of the main lock core and the inner wall of the left baffle respectively;

[0014] A limiting plate is provided within the limit sleeve, the limiting plate is adapted to limit the extreme position of the clockwise rotation of the limiting portion to be vertically downward, when the limiting portion is vertically downward and within the limit sleeve, and the return spring will not be distorted;

[0015] A magnetic attraction plate is provided on the left baffle, a magnetic attraction portion is provided on the limiting portion, the magnetic attraction plate is adapted to attract the magnetic attraction portion when the limiting portion rotates counterclockwise by ninety degrees from the vertically downward state, and when the limiting portion is rotated counterclockwise by ninety degrees, it is outside the limit sleeve;

[0016] When the limiting portion is vertically downward, the first channel and the second channel are not in communication, when the limiting portion is at a position rotated counterclockwise by forty-five degrees from the vertically downward state, the first channel and the second channel are completely in communication, and when the magnetic attraction portion attracts the magnetic attraction plate, the first channel and the second channel are not in communication.

[0017] Further, the lifting mechanism includes a driving bevel gear, a driven bevel gear, a connecting rod, a first driving gear, a first driven gear, a threaded rod, and a first transmission sleeve;

[0018] The driving bevel gear is rotatably installed on the other side of the support plate. A third channel is formed in the driving bevel gear. A docking hole penetrating through the support plate is formed on the support plate. The third channel and the second channel are always in a communicating state;

[0019] The connecting rod is rotatably installed in the left baffle. The driven bevel gear is fixedly sleeved on the outer peripheral surface of the connecting rod. The driven bevel gear meshes with the driving bevel gear. The threaded rod is rotatably installed in the left baffle. The first driving gear is fixedly sleeved on the outer peripheral surface of the connecting rod. The first driven gear is fixedly sleeved on the outer peripheral surface of the threaded rod. The first driving gear and the first driven gear mesh with each other. The first transmission sleeve is assembled outside the threaded rod. A first sliding groove is formed in the placing plate. The first sliding groove communicates with the inside of the left baffle. The first transmission sleeve passes through the first sliding groove and is connected to the partition board;

[0020] The inner key is adapted to pass through the first channel and the second channel and insert into the third channel when the first channel and the second channel are in communication, thereby driving the driving bevel gear to rotate, so as to control the lifting state of the partition board. Two sliding rails are arranged in the placing plate. The partition board is slidably arranged in the sliding rails.

[0021] Further, a guiding rod is fixedly arranged in the right baffle. A second transmission sleeve is slidably arranged on the outer part of the guiding rod. A second sliding groove is formed in the placing plate. The second sliding groove communicates with the inside of the right baffle. The second transmission sleeve passes through the second sliding groove and is connected to the partition board;

[0022] A groove is formed in the sliding rail. A convex block is arranged on the partition board. The convex block is inserted into the groove;

[0023] A cavity is formed in the partition board. A plurality of second heat dissipation holes are formed on one side of the partition board close to the electricity meter. The second heat dissipation holes communicate with the cavity. A first heat dissipation hole is formed at the top of the partition board. The first heat dissipation hole communicates with the cavity;

[0024] A through groove is formed at the top of the placing plate. The partition board is adapted to move outwards of the placing plate through the through groove.

[0025] Further, a fitting groove is formed on the part of the main lock core located outside the left baffle. A fitting part is arranged on the outer part of the outer key. The fitting part is adapted to be inserted into the fitting groove to drive the main lock core to rotate;

[0026] An activity slot is formed inside the outer key, the inner key is movably arranged in the activity slot, a connecting block is arranged on the outer peripheral surface of the inner key, a straight slot is formed in the activity slot, and when the inner key linearly moves in the activity slot, the connecting block slides in the straight slot;

[0027] An outer ring slot is formed in the activity slot, the outer ring slot communicates with the straight slot, and the outer ring slot is adapted to provide a space for the inner key to rotate in the activity slot when the inner key linearly moves in the activity slot until the connecting block enters the outer ring slot;

[0028] A connecting sleeve is rotatably arranged outside the inner key, a bracket is arranged on the outer key, a telescopic spring is sleeved outside the inner key, two ends of the telescopic spring are respectively connected to the bracket and the connecting sleeve, an inner ring slot is formed in the activity slot, the inner ring slot communicates with the straight slot, and when the inner key moves in the activity slot, the connecting sleeve moves in the inner ring slot;

[0029] A handle is arranged on the inner key.

[0030] Further, the first channel, the second channel, the third channel and the docking hole are all round holes with the same size, and the inner key is a cylinder;

[0031] At least one clamping slot is formed in the third channel, a contraction slot corresponding to the clamping slot is formed in a part of the inner key that needs to be inserted into the third channel, a spring telescopic rod is arranged in the contraction slot, a clamping block is connected to the telescopic end of the spring telescopic rod, a blocking part is arranged on the contraction slot, the blocking part is adapted to limit the clamping block from completely extending out of the outer part of the inner key, and the clamping block is adapted to follow the inner key to be inserted into the third channel and extend into the clamping slot in the third channel, so that the inner key is docked with the driving bevel gear;

[0032] A first arc part is arranged on the clamping block, a second arc part is formed in the activity slot, and a third arc part is arranged on the support plate.

[0033] Further, the electric energy metering box with a security structure further includes a self-locking assembly, and the self-locking assembly includes a mounting plate, a fixing rod, a second driving gear, a second driven gear and a rotating rod;

[0034] An upper fixing plate and a lower fixing plate are arranged on the right baffle, a switch shaft is rotatably installed between the upper fixing plate and the lower fixing plate, and the rotating door is fixedly sleeved outside the switch shaft;

[0035] One end of the switch shaft passes through and extends into the lower fixing plate. The second driving gear is fixedly sleeved on the part of the switch shaft located inside the lower fixing plate. The rotating rod is rotatably installed in the right baffle. The second driven gear is fixedly sleeved on the rotating rod. The second driving gear meshes with the second driven gear. The mounting plate is connected to the second transmission sleeve. The fixing rod is fixedly connected inside the mounting plate. A first limiting ring is fixedly sleeved on the fixing rod. A second limiting ring is fixedly sleeved on the rotating rod.

[0036] The mounting plate is adapted to move along with the partition plate. When the partition plate is completely located inside the placing plate and does not move upward, the rotating door is rotated open, driving the second limiting ring to rotate towards the fixing rod and contact the first limiting ring and the fixing rod. The second limiting ring is located above the first limiting ring, making the rotating door unable to be completely opened and the partition plate unable to move upward.

[0037] Furthermore, a docking plate is connected to the second limiting ring. An infrared receiver is installed on the docking plate. An infrared emitter and a control box are installed inside the mounting plate. A buzzer, a controller, and a power supply group are arranged inside the control box. The power supply group is connected to the infrared emitter. The infrared receiver is adapted to correspond to the position of the infrared emitter and receive the light beam emitted by the infrared emitter when the second limiting ring contacts the fixing rod, and then feedback the signal to the controller. The controller drives the buzzer after receiving the signal.

[0038] Furthermore, a plurality of accommodating grooves arranged at intervals are formed inside the left baffle. A pushing assembly is arranged inside the accommodating groove. The pushing assembly includes a driving shaft, a cam, and a torsion spring.

[0039] The driving shaft is rotatably installed inside the accommodating groove. The cam is fixedly sleeved outside the driving shaft. The torsion spring is sleeved on the driving shaft. One end of the torsion spring is connected to the inner wall of the accommodating groove. The other end of the torsion spring is connected to the cam.

[0040] A contact part is arranged on the cam. In the initial state of the cam, the contact part extends outside the accommodating groove. When the rotating door is closed, the contact part is squeezed, causing the cam to rotate and retract into the accommodating groove. When the rotating door is opened, the torsion spring drives the cam to reset, causing the contact part to generate a thrust on the rotating door.

[0041] Adopting the above technical solutions, the present invention has the following beneficial effects:

[0042] Through the settings of structures such as a composite lock core and a composite key, when in use, it is necessary to first dock the outer key in the composite key with the main lock core in the composite lock core. By rotating, the main lock core loses its restriction on the limit sleeve, causing the revolving door to open. During the process of rotating the main lock core, it is necessary to align the first channel of the main lock core with the second channel in the secondary lock plate of the composite lock core. Then, the inner key in the composite key passes through the first channel and the second channel to dock with the lifting mechanism. Only after the partition is lifted by the lifting mechanism can electrical appliances such as the electricity meter inside be accessed.

[0043] Through the settings of structures such as a return spring, a limiting plate, and a magnetic attraction plate, the function of the return spring is that as long as the outer key is pulled out, the main lock core will automatically reset. Under the cooperation of the limiting plate and the magnetic attraction plate, the rotation range of the main lock core is restricted between vertically downward and counterclockwise rotation of 90 degrees. To open the door, it is necessary to rotate counterclockwise by 90 degrees to make the magnetic attraction plate and the magnetic attraction part adsorb and fix the position of the main lock core. However, after rotating 90 degrees, the first channel and the second channel will not be connected, and the partition cannot be lifted. Without rotating 90 degrees, the restriction of the main lock core on the limit sleeve cannot be released, and the revolving door cannot be opened. Only by operating correctly, rotating 45 degrees without pulling out the outer key to align the first channel and the second channel, and then inserting the inner key into it to control the lifting mechanism to lift the partition first and then open the revolving door can the electricity meter be accessed.

[0044] Through the settings of structures such as a first limiting ring, a second limiting ring, and a fixing rod, directly opening the revolving door without first lifting the partition will cause the second limiting ring to contact both the first limiting ring and the fixing rod at the same time. The contact between the second limiting ring and the fixing rod causes the revolving door not to be fully opened. The incompletely opened revolving door restricts the method of lawbreakers opening the revolving door first and then manually adjusting the alignment of the first channel and the second channel and then lifting the partition. At the same time, when the second limiting ring contacts the first limiting ring, the second limiting ring is located above the first limiting ring, which also restricts the space for the partition to move upward. It is necessary to close the revolving door first to make the partition move upward. At this time, the closed revolving door requires the composite key of the outer key and the inner key to achieve the effects of opening the door and lifting the partition. Brief Description of the Drawings

[0045] Figure 1 It is a schematic diagram of the overall external structure of the protective shell of the present invention;

[0046] Figure 2 It is a schematic diagram of the internal structure of the protective shell of the present invention Figure 1 ;

[0047] Figure 3 It is a schematic diagram of the internal structure of the protective shell of the present invention Figure 2 ;

[0048] Figure 4 It is of the present invention Figure 3 The enlarged view at A in

[0049] Figure 5 Schematic diagram of the internal structure of the left baffle of the present invention;

[0050] Figure 6 Of the present invention Figure 5 Enlarged view at B in;

[0051] Figure 7 Schematic diagram of the main lock core structure of the present invention;

[0052] Figure 8 Schematic diagram of the secondary lock disk structure of the present invention;

[0053] Figure 9 Schematic diagram of the limiting sleeve structure of the present invention;

[0054] Figure 10 Schematic diagram of the cooperation between the composite key and the composite lock core of the present invention;

[0055] Figure 11 Schematic diagram of the overall structure of the composite key of the present invention;

[0056] Figure 12 Schematic diagram of the movable slot structure of the present invention;

[0057] Figure 13 Of the present invention Figure 12 Enlarged view at C in;

[0058] Figure 14 Schematic diagram of the internal key structure of the present invention;

[0059] Figure 15 Schematic diagram of the internal structure of the right baffle of the present invention Figure 1 ;

[0060] Figure 16 Of the present invention Figure 15 Enlarged view at D in;

[0061] Figure 17 Schematic diagram of the internal structure of the right baffle of the present invention Figure 2 ;

[0062] Figure 18 Of the present invention Figure 17 Enlarged view at E in;

[0063] Figure 19 Of the present invention Figure 17 Enlarged view at F in.

[0064] In the figure: 1, protective shell; 11, placement plate; 12, left baffle; 13, right baffle; 14, rotating door; 15, limiting sleeve; 16, limiting plate; 17, magnetic attraction plate; 18, magnetic attraction part; 19, upper fixing plate; 110, lower fixing plate; 111, switch shaft;

[0065] 2. Ammeter; 3. Air switch;

[0066] 4. Composite lock core; 41. Main lock core; 42. Fitting groove; 43. Limiting part; 44. First channel; 45. Return spring; 46. Sub-lock disc; 47. Support plate; 48. Second channel; 49. Third arc part;

[0067] 5. Composite key; 51. Outer key; 52. Fitting part; 53. Inner key; 54. Straight groove; 55. Inner ring groove; 56. Outer ring groove; 57. Connecting sleeve; 58. Telescopic spring; 59. Bracket; 510. Spring telescopic rod; 511. Block; 512. Blocking part; 513. First arc part; 514. Second arc part; 515. Connecting block; 516. Handle;

[0068] 6. Lifting mechanism; 61. Driving bevel gear; 62. Third channel; 63. Card slot; 64. Driven bevel gear; 65. Connecting rod; 66. First driving gear; 67. First driven gear; 68. Threaded rod; 69. First transmission sleeve; 610. Slide rail; 611. Groove; 612. Guide rod; 613. Second transmission sleeve;

[0069] 7. Partition board; 71. First heat dissipation hole; 72. Second heat dissipation hole; 73. Convex block;

[0070] 8. Self-locking component; 81. Mounting plate; 82. Fixed rod; 83. First limiting ring; 84. Second driving gear; 85. Second driven gear; 86. Rotating rod; 87. Second limiting ring; 88. Docking plate; 89. Infrared receiver; 810. Infrared transmitter; 811. Control box;

[0071] 91. Driving shaft; 92. Cam; 93. Twisted spring; 94. Contact part. Detailed implementation mode

[0072] In order to make the content of the present invention easier to be clearly understood, the present invention will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

[0073] Embodiment 1: As Figure 1-3 . Figure 5-8 shown, an electric energy metering box with a security structure includes:

[0074] A protective shell 1, the protective shell 1 includes a placement plate 11 provided with an opening, a left baffle 12 and a right baffle 13 connected to the placement plate 11, and a revolving door 14 rotatably arranged on the right baffle 13, and a limiting sleeve 15 is arranged inside the revolving door 14;

[0075] The partition plate 7 is slidably arranged in the placement plate 11, and a storage space is formed between the partition plate 7 and the closed surface of the placement plate 11. An ammeter 2 and an air switch 3 are installed in the storage space;

[0076] The lifting mechanism 6 is arranged in the left baffle 12, and the lifting mechanism 6 is connected to the partition plate 7;

[0077] The composite lock core 4 is arranged on the left baffle 12. The composite lock core 4 includes a main lock core 41 rotatably arranged and a secondary lock disc 46 fixedly arranged. A first channel 44 is opened in the main lock core 41, and a second channel 48 is opened in the secondary lock disc 46;

[0078] The composite key 5 includes an outer key 51 and an inner key 53 movably arranged inside the outer key 51. The outer key 51 is adapted to be inserted into and rotate the main lock core 41 to change the matching relationship between the main lock core 41 and the limit sleeve 15, thereby controlling the opening and closing state of the revolving door 14. The inner key 53 is adapted to pass through the first channel 44 and the second channel 48 and dock with the lifting mechanism 6 when the main lock core 41 is rotated to make the first channel 44 communicate with the second channel 48.

[0079] As Figure 6-9 shown, the main lock core 41 is rotatably arranged on the left baffle 12 and passes through the left baffle 12. A limit portion 43 is arranged on the main lock core 41 outside the left baffle 12. When the main lock core 41 is rotated so that the limit portion 43 is located inside the limit sleeve 15, the revolving door 14 is in the closed state. When the main lock core 41 is rotated so that the limit portion 43 is located outside the limit sleeve 15, the revolving door 14 is in the open state;

[0080] The end face of the main lock core 41 inside the left baffle 12 is connected to one end of the secondary lock disc 46 through a rotating shaft. A support plate 47 is connected inside the left baffle 12, and one side of the support plate 47 is fixedly connected to the other end of the secondary lock disc 46.

[0081] As Figure 9-10 shown, a return spring 45 is sleeved on the part of the main lock core 41 inside the left baffle 12. Two ends of the return spring 45 are respectively connected to the outer peripheral surface of the main lock core 41 and the inner wall of the left baffle 12;

[0082] A limiting plate 16 is arranged inside the limit sleeve 15. The limiting plate 16 is adapted to limit the extreme position of the clockwise rotation of the limit portion 43 to be vertically downward. When the limit portion 43 is vertically downward, it is located inside the limit sleeve 15, and the return spring 45 will not be distorted;

[0083] A magnetic attraction plate 17 is arranged on the left baffle 12, and a magnetic attraction portion 18 is arranged on the limit portion 43. The magnetic attraction plate 17 is adapted to attract the magnetic attraction portion 18 when the limit portion 43 rotates counterclockwise by ninety degrees from the vertically downward state. When the limit portion 43 is rotated counterclockwise by ninety degrees, it is located outside the limit sleeve 15;

[0084] When the limiting part 43 is vertically downward, the first channel 44 is not communicated with the second channel 48. When the limiting part 43 is in the position rotated counterclockwise by 45 degrees from the vertically downward state, the first channel 44 and the second channel 48 are completely communicated. When the magnetic attraction part 18 is attracted to the magnetic attraction plate 17, the first channel 44 and the second channel 48 are not communicated.

[0085] As Figure 5 shown in the figure, the lifting mechanism 6 includes a driving bevel gear 61, a driven bevel gear 64, a connecting rod 65, a first driving gear 66, a first driven gear 67, a threaded rod 68 and a first transmission sleeve 69;

[0086] The driving bevel gear 61 is rotatably installed on the other side of the support plate 47. A third channel 62 is opened in the driving bevel gear 61. A docking hole penetrating through itself is opened in the support plate 47. The third channel 62 and the second channel 48 are always in a communicated state;

[0087] The connecting rod 65 is rotatably installed in the left baffle 12. The driven bevel gear 64 is fixedly sleeved on the outer peripheral surface of the connecting rod 65. The driven bevel gear 64 is meshed with the driving bevel gear 61. The threaded rod 68 is rotatably installed in the left baffle 12. The first driving gear 66 is fixedly sleeved on the outer peripheral surface of the connecting rod 65. The first driven gear 67 is fixedly sleeved on the outer peripheral surface of the threaded rod 68. The first driving gear 66 and the first driven gear 67 are meshed with each other. The first transmission sleeve 69 is assembled outside the threaded rod 68. A first sliding groove is opened in the placing plate 11. The first sliding groove is communicated with the inside of the left baffle 12. The first transmission sleeve 69 passes through the first sliding groove and is connected with the partition plate 7;

[0088] The inner key 53 is adapted to pass through the first channel 44 and the second channel 48 and insert into the third channel 62 when the first channel 44 and the second channel 48 are communicated, so as to drive the driving bevel gear 61 to rotate, thereby controlling the lifting state of the partition plate 7. Two sliding rails 610 are arranged in the placing plate 11. The partition plate 7 is slidably arranged in the sliding rails 610.

[0089] As Figure 3-5 、 Figure 15 shown, a guide rod 612 is fixedly arranged in the right baffle 13. A second transmission sleeve 613 is slidably arranged on the outer part of the guide rod 612. A second sliding groove is opened in the placing plate 11. The second sliding groove is communicated with the inside of the right baffle 13. The second transmission sleeve 613 passes through the second sliding groove and is connected with the partition plate 7;

[0090] A groove 611 is opened in the sliding rail 610. A convex block 73 is arranged on the partition plate 7. The convex block 73 is inserted into the groove 611;

[0091] A cavity is formed in the partition plate 7. A plurality of second heat dissipation holes 72 are formed in one side of the partition plate 7 close to the electricity meter 2. The second heat dissipation holes 72 communicate with the cavity. A first heat dissipation hole 71 is formed in the top of the partition plate 7. The first heat dissipation hole 71 communicates with the cavity.

[0092] A through groove is formed in the top of the placement plate 11. The partition plate 7 is adapted to pass through the through groove and move towards the outside of the placement plate 11.

[0093] The working principle of this embodiment is as follows:

[0094] An electricity meter 2, an air switch 3 and related electrical appliances are arranged in the placement plate 11. A revolving door 14 is rotatably arranged at the opening of the placement plate 11. The revolving door 14 realizes the opening and closing of the opening of the placement plate 11 by rotating. A partition plate 7 is arranged between the electricity meter 2 and the opening. The partition plate 7 serves as another layer of insurance outside the revolving door 14. To operate the electricity meter 2 and related electrical appliances, it is necessary to open the revolving door 14 and raise the partition plate 7.

[0095] When the revolving door 14 is in the closed state, the limiting part 43 of the main lock core 41 is located inside the limiting sleeve 15 on the revolving door 14. At this time, the revolving door 14 cannot be directly opened. It is necessary to drive the main lock core 41 to rotate by inserting an external key 51 matching the main lock core 41 into the main lock core 41, so that the limiting part 43 rotates to leave the inside of the limiting sleeve 15 before it can be opened. The setting of the main lock core 41 is relatively simple. Only the matching external key 51 can realize the opening of the revolving door 14 by a single rotation. Since the door lock principle in the prior art has been overcome, the traditional method is not adopted. It takes a lot of time for illegal personnel to make an external key 51 matching the main lock core 41, so as to increase the difficulty of unlocking. If a tool with a size close to that is directly inserted into the main lock core 41 by an interference fit method to drive the main lock core 41 to open the revolving door 14, it is easy to have the problem that the tool gets stuck and cannot be removed.

[0096] Even if the revolving door 14 is successfully opened, it is impossible to directly operate the electrical appliances in the placement board 11 because the partition board 7 has not been raised. When illegal persons discover that the partition board 7 needs to be raised to see the internal electrical appliances, they need to study the main lock core 41. Only when they find that the first channel 44 of the main lock core 41 can be aligned with the second channel 48 on the fixedly arranged auxiliary lock disc 46 after rotating the main lock core 41, and then use a tool to pass through the first channel 44 and the second channel 48 to probe the docking part of the internal driving bevel gear 61. After probing, a tool that can drive the driving bevel gear 61 to rotate is manufactured. At this time, the manufacturing difficulty of the tool is greater. The driving bevel gear 61 located in the left baffle 12 is far from the outside and it is difficult to probe the structure docked with it. And at this time, it is not appropriate to directly insert the tool into the first channel 44, the first channel 44 and the driving bevel gear 61 by means of interference fit, which is likely to cause the tool to get stuck and unable to drive the driving bevel gear 61 to rotate normally. The normal and continuous rotation of the driving bevel gear 61 is required to raise the partition board 7 so that the electrical appliances in the placement board 11 can be operated. Illegal persons need to overcome three major problems: the main lock core 41, the auxiliary lock disc 46, and how to dock with the driving bevel gear 61 before they can carry out illegal operations, which greatly increases the difficulty and thus improves the safety of the metering box;

[0097] The normal operation should be to insert the external key 51 matching the main lock core 41 into the main lock core 41 to drive the main lock core 41 to rotate, rotate the limiting part 43 of the main lock core 41 to the outside of the limiting sleeve 15, then open the revolving door 14, and then manually rotate the main lock core 41 until the first channel 44 communicates with the second channel 48. Then insert the internal key 53 into the first channel 44 and the second channel 48 to dock with the driving bevel gear 61, and then raise the partition board 7. However, since it is a staff member who knows the opening method and has the corresponding composite key 5, it is possible to directly rotate the main lock core 41 to make the first channel 44 communicate with the second channel 48 by the external key 51 without opening the revolving door 14, and then without pulling out the external key 51, directly extend the internal key 53 on the external key 51 into the first channel 44 and the second channel 48 to dock with the driving bevel gear 61, or after opening and rotating, insert the external key 51 into the main lock core 41 and rotate it until the two channels communicate, then without pulling out the external key 51, directly extend the internal key 53 without the need for hand assistance;

[0098] When the inner key 53 is inserted into the first channel 44 and the second channel 48 to dock with the driving bevel gear 61, the inner key 53 needs to be continuously rotated, thereby driving the continuous rotation of the driving bevel gear 61. The rotation of the connecting rod 65 is realized through the meshing of the driving bevel gear 61 and the driven bevel gear 64. The connecting rod 65 drives the first driving gear 66 to rotate. The rotation of the threaded rod 68 is realized through the meshing of the first driving gear 66 and the first driven gear 67. The first transmission sleeve 69 outside the threaded rod 68 moves along the axis of the threaded rod 68 under the rotation of the threaded rod 68. The first transmission sleeve 69 is connected to the partition plate 7, thereby driving the rising or falling of the partition plate 7. The rising and falling need to be realized through the forward and reverse rotation of the inner key 53. It should be noted that the secondary transmission through the first driving gear 66 and the second driving gear 84 is because the composite lock core 4 is arranged at the center position of the left baffle 12, which is convenient for the operator to use. The moving distance of the partition plate 7 is close to the height of the entire placement plate 11. To avoid insufficient stroke, two transmissions are set. At the same time, a ball nut can be used for the assembly between the first transmission sleeve 69 and the threaded rod 68. The rotation movement of the threaded rod 68 driving the linear movement is a prior art, and its specific working principle will not be elaborated in detail here;

[0099] During the lifting process of the partition plate 7, it is located inside the slide rail 610. The stability of the lifting of the partition plate 7 can be improved inside the slide rail 610. To prevent illegal personnel from directly violently disassembling the slide rail 610 after opening the revolving door 14 to remove the partition plate 7, a convex block 73 is provided on the partition plate 7, and a groove 611 is provided on the slide rail 610. The partition plate 7 is clamped in the slide rail 610 through the cooperation between the convex block 73 and the groove 611. When illegal personnel violently disassemble the slide rail 610, the part of the groove 611 will be squeezed, and the squeezed part of the groove 611 will further squeeze the convex block 73. At this time, the difficulty of violent disassembly is greatly increased;

[0100] At the same time, a guide rod 612 is arranged inside the right baffle 13. A second transmission sleeve 613 connected to the partition plate 7 is slidably arranged outside the guide rod 612. When the partition plate 7 is driven to move, it will also drive the second transmission sleeve 613 to move on the guide rod 612. The friction force generated between the second transmission sleeve 613 and the guide rod 612 can make the movement of the partition plate 7 more stable. A second heat dissipation hole 72 is opened on the surface of the partition plate 7 close to the ammeter 2, and a first heat dissipation hole 71 is opened at the top of the partition plate 7. The two heat dissipation holes can ensure that the electrical appliances meet the heat dissipation conditions when the partition plate 7 is located inside the placement plate 11. At the same time, the side of the partition plate 7 facing the opening of the placement plate 11 is not provided with heat dissipation holes, which can confuse illegal personnel and prevent them from knowing immediately that the electrical appliances are behind the partition plate 7. The first heat dissipation hole 71 at the top communicates with the through groove on the placement plate 11 for the movement of the partition plate 7, that is, the heat dissipation of the first heat dissipation hole 71 is realized, and at the same time, illegal personnel are confused into thinking that this is only a heat dissipation treatment rather than a liftable partition plate 7.

[0101] Embodiment 2: As Figure 7 、 Figure 10-13 shown, on the basis of Embodiment 1, this embodiment further includes the following structure: A mating groove 42 is formed on the part of the main lock core 41 located outside the left baffle 12. A mating portion 52 is provided on the outside of the outer key 51. The mating portion 52 is adapted to be inserted into the mating groove 42 to drive the main lock core 41 to rotate;

[0102] An activity groove is formed inside the outer key 51. The inner key 53 is movably arranged in the activity groove. A connecting block 515 is arranged on the outer peripheral surface of the inner key 53. A straight groove 54 is formed in the activity groove. When the inner key 53 moves linearly in the activity groove, the connecting block 515 slides in the straight groove 54;

[0103] An outer ring groove 56 is formed in the activity groove. The outer ring groove 56 communicates with the straight groove 54. The outer ring groove 56 is adapted to provide a space for the inner key 53 to rotate in the activity groove when the inner key 53 moves linearly in the activity groove until the connecting block 515 enters the outer ring groove 56;

[0104] A connecting sleeve 57 is rotatably arranged on the outside of the inner key 53. A bracket 59 is arranged on the outer key 51. A telescopic spring 58 is sleeved on the outside of the inner key 53. Two ends of the telescopic spring 58 are respectively connected to the bracket 59 and the connecting sleeve 57. An inner ring groove 55 is formed in the activity groove. The inner ring groove 55 communicates with the straight groove 54. When the inner key 53 moves in the activity groove, the connecting sleeve 57 moves in the inner ring groove 55;

[0105] A handle 516 is arranged on the inner key 53.

[0106] As Figure 10 、 Figure 13-14 shown, the first channel 44, the second channel 48, the third channel 62 and the docking hole are all round holes with the same size. The inner key 53 is a cylinder;

[0107] At least one card slot 63 is formed in the third channel 62. A contraction groove corresponding to the card slot 63 is formed in the part of the inner key 53 that needs to be inserted into the third channel 62. A spring telescopic rod 510 is arranged in the contraction groove. A card block 511 is connected to the telescopic end of the spring telescopic rod 510. A blocking portion 512 is arranged on the contraction groove. The blocking portion 512 is adapted to limit the card block 511 from completely protruding to the outside of the inner key 53. The card block 511 is adapted to follow the inner key 53 to be inserted into the third channel 62 and extend into the card slot 63 in the third channel 62, so that the inner key 53 is docked with the active bevel gear 61;

[0108] A first arc portion 513 is arranged on the card block 511. A second arc portion 514 is formed in the activity groove. A third arc portion 49 is arranged on the support plate 47.

[0109] The working principle of this embodiment is as follows:

[0110] In order to further increase the difficulty of opening the revolving door 14 and the partition 7, the mating groove 42 on the main lock core 41 is set in the form of a circle plus multiple grooves 611, which increases the difficulty for illegal personnel to manufacture a matching external key 51;

[0111] At the same time, the rotation range of the main lock core 41 is restricted. A return spring 45 is arranged on the main lock core 41, and the return spring 45 connects the main lock core 41 and the inner wall of the left baffle 12. When the return spring 45 is not distorted, that is, when the main lock core 41 is in the initial state, this initial state is set to be vertically downward. When the limiting part 43 of the main lock core 41 is located within the limiting sleeve 15, the vertically downward state can block the limiting sleeve 15, achieving the effect of closing the revolving door 14. A limiting plate 16 is arranged within the limiting sleeve 15. Under the limitation of the limiting plate 16, the main lock core 41 in the vertical state cannot further rotate clockwise and can only rotate counterclockwise. When the main lock core 41 rotates counterclockwise by ninety degrees, it just completely disengages from the inside of the limiting sleeve 15. At this time, the revolving door 14 can be opened. However, when the main lock core 41 rotates to ninety degrees, the magnetic attraction part 18 on the limiting part 43 will attract the magnetic attraction plate 17, thereby fixing the main lock core 41 at the position of rotating counterclockwise by ninety degrees. The limitation of the rotation angle of the main lock core 41 in this part is to provide services for the alignment of the first channel 44 and the second channel 48. When the main lock core 41 is in the initial position, that is, in the vertically downward state, the revolving door 14 is locked. At this time, the first channel 44 and the second channel 48 are not aligned, and illegal personnel cannot peek into the second channel 48, nor can they try to dock with the internal driving bevel gear 61. When illegal personnel rotate the main lock core 41 to the limit position, that is, rotate counterclockwise by ninety degrees, the main lock core 41 is adsorbed and fixed. When the main lock core 41 is in the position after rotating counterclockwise by ninety degrees, the first channel 44 and the second channel 48 are still not aligned. At this time, even if illegal personnel open the revolving door 14, they still cannot peek into the second channel 48. When illegal personnel do not know the specific opening method, they will be helpless in the face of the partition 7. But if they know the specific opening method, they need to turn the main lock core 41 to the position of rotating counterclockwise by forty-five degrees from the initial state. Only at this time can the first channel 44 and the second channel 48 be aligned and the internal structure can be peeked into. This part mainly improves the alignment difficulty of the first channel 44 and the second channel 48 to improve the protection effect, but there are still defects;

[0112] Therefore, the first channel 44, the second channel 48, and the third channel 62 for docking on the driving bevel gear 61 are all set to be circular. After an illegal person successfully rotates counterclockwise by forty-five degrees and aligns the first channel 44 and the second channel 48, it is found that a cylindrical inner key 53 is required to rotate the driving bevel gear 61. It should be noted that if the size of the cylindrical inner key 53 is too small, it cannot drive the driving bevel gear 61 to rotate. If the size is too large, it will get stuck in the second channel 48 and cannot rotate. If it gets stuck in the first channel 44, it will drive the rotation of the main lock core 41 during the rotation process, resulting in a change in the position of the first channel 44 and will also get stuck. Moreover, even if the correct size is manufactured, it cannot be docked with the third channel 62 on the driving bevel gear 61. The circular channel and the cylindrical key simply cannot be docked;

[0113] An illegal person needs to observe and probe for a long time to discover the card slot 63 in the third channel 62. The third channel 62 has the same size as the first channel 44 and the second channel 48. It is very difficult for an illegal person to observe the specific position and size of the card slot 63 in the third channel 62. At the same time, the card block 511 on the inner key 53 that matches the card slot 63 needs to retract into the inner key 53 when passing through the first channel 44 and the second channel 48 and can only expand in the third channel 62 to be docked with the card slot 63. This setting further increases the difficulty for an illegal person to manufacture tools;

[0114] The correct way for the staff to open it should be to insert the outer key 51 corresponding to the mating groove 42 of the main lock core 41 into the main lock core 41 and then rotate it counterclockwise by 45 degrees to align the first channel 44 and the second channel 48. After alignment, push the inner key 53 in the outer key 51. The connecting block 515 on the inner key 53 moves in the straight groove 54. At this time, the inner key 53 still cannot rotate. When the front end of the inner key 53 passes through the first channel 44 and the second channel 48 and enters the third channel 62, the position of the connecting block 515 comes to the outer ring groove 56. In the outer ring groove 56, the inner key 53 can freely rotate within the outer key 51. As for the docking of the latch block 511 and the card slot 63, when the inner key 53 is still within the outer key 51, the latch block 511 is completely retracted into the inner key 53 under the extrusion of the outer ring groove 56 and will be squeezed and contracted when passing through the first channel 44 and the second channel 48 in sequence. Only when it reaches the third channel 62, the card slot 63 cannot squeeze the latch block 511. Therefore, the latch block 511 partially pops out of the inner key 53 under the action of the spring telescopic rod 510 and enters the inside of the card slot 63 to achieve docking. It should be noted that a blocking portion 512 is provided in the groove for accommodating the latch block 511. The blocking portion 512 can prevent the entire latch block 511 from being popped out by the spring telescopic rod 510, resulting in the inability to retract the inner key 53 later. When the docking between the latch block 511 and the card slot 63 is completed, rotating the inner key 53 can achieve the effect of driving the driving bevel gear 61 to rotate. The spring telescopic rod 510 is a combination of an ordinary telescopic rod and a spring, rather than a telescopic rod with a damping setting. The telescopic rod only needs to complete contraction and support the spring from being bent;

[0115] To avoid the inconvenience of carrying and storing the outer key 51 and the inner key 53, a connecting member is provided between the two keys to form an integral composite key 5. A connecting sleeve 57 is rotatably arranged outside the inner key 53, a bracket 59 is arranged on the outer key 51, and a telescopic spring 58 is arranged between the bracket 59 and the connecting sleeve 57. An inner ring groove 55 is formed in the movable groove for placing the inner key 53. When the inner key 53 needs to be inserted into the first channel 44 and the second channel 48, the inner key 53 is pushed to move linearly. At this time, the connecting sleeve 57 moves with the inner key 53 in the inner ring groove 55. When the connecting block 515 enters the outer ring groove 56, the connecting sleeve 57 also enters the outer ring groove 56. At the same time, since the connecting sleeve 57 is rotatably arranged on the inner key 53, the rotation of the inner key 53 will not affect the connecting sleeve 57, the telescopic spring 58 and the bracket 59, that is, the rotation of the inner key 53 will not twist the telescopic spring 58. After the partition 7 is successfully raised, the connecting block 515 is moved to the position of the straight groove 54 and then released. The telescopic spring 58 can drive the inner key 53 to automatically reset. It should be noted that in order to smoothly retract the latch 511 when the inner key 53 exits the third channel 62, a third arc portion 49 is arranged on the support plate 47. The third arc portion 49 directly presses against the first arc portion 513 to smoothly retract the latch 511 into the inner key 53. When the inner key 53 exits the second channel 48 and the first channel 44 and enters the outer key 51, the first arc portion 513 contacts the second arc portion 514 again, further improving the stability of the retraction of the latch 511;

[0116] At the same time, a handle 516 is also arranged on the inner key 53. The handle 516 can improve the convenience of rotating the inner key 53. It takes a long time to rotate the inner key 53 to fully raise the partition 7, which also brings trouble to the actions of illegal personnel. Multiple notches are formed on the handle 516. When an operator operates normally, an electric rotary tool such as a pistol drill can be used. A connector matching the notch is installed, and the automatic rotation is realized through the docking of the connector with the handle 516, so as to improve the opening speed of the partition 7.

[0117] Embodiment Three: As Figure 15-18 shown, this embodiment further includes the following structure on the basis of Embodiment One: The electric energy metering box with a security structure further includes a self-locking assembly 8. The self-locking assembly 8 includes a mounting plate 81, a fixed rod 82, a second driving gear 84, a second driven gear 85 and a rotating rod 86;

[0118] An upper fixing plate 19 and a lower fixing plate 110 are arranged on the right baffle 13. A switch shaft 111 is rotatably installed between the upper fixing plate 19 and the lower fixing plate 110. The revolving door 14 is fixedly sleeved outside the switch shaft 111;

[0119] One end of the switch shaft 111 passes through and extends into the lower fixing plate 110. The second driving gear 84 is fixedly sleeved on the part of the switch shaft 111 located inside the lower fixing plate 110. The rotating rod 86 is rotatably installed in the right baffle 13. The second driven gear 85 is fixedly sleeved on the rotating rod 86. The second driving gear 84 meshes with the second driven gear 85. The mounting plate 81 is connected to the second transmission sleeve 613. The fixing rod 82 is fixedly connected inside the mounting plate 81. A first limiting ring 83 is fixedly sleeved on the fixing rod 82. A second limiting ring 87 is fixedly sleeved on the rotating rod 86;

[0120] The mounting plate 81 is adapted to move along with the partition plate 7. When the partition plate 7 is completely located inside the placing plate 11 and does not move upward, the rotating door 14 is rotated to open, driving the second limiting ring 87 to rotate towards the fixing rod 82 and contact the first limiting ring 83 and the fixing rod 82. The second limiting ring 87 is located above the first limiting ring 83, making the rotating door 14 unable to be completely opened and the partition plate 7 unable to move upward.

[0121] As Figure 15-18 shown, a docking plate 88 is connected to the second limiting ring 87. An infrared receiver 89 is installed on the docking plate 88. An infrared emitter 810 and a control box 811 are installed inside the mounting plate 81. A buzzer, a controller and a power supply group are arranged inside the control box 811. The power supply group is connected to the infrared emitter 810. The infrared receiver 89 is adapted to correspond to the position of the infrared emitter 810 and receive the light beam emitted by the infrared emitter 810 when the second limiting ring 87 contacts the fixing rod 82, and then feedback the signal to the controller. The controller drives the buzzer after receiving the signal.

[0122] As Figure 19 shown, a plurality of accommodating grooves arranged at intervals are formed in the left baffle 12. A pushing component is arranged inside the accommodating groove. The pushing component includes a driving shaft 91, a cam 92 and a torsion spring 93;

[0123] The driving shaft 91 is rotatably installed in the accommodating groove. The cam 92 is fixedly sleeved on the outside of the driving shaft 91. The torsion spring 93 is sleeved on the driving shaft 91. One end of the torsion spring 93 is connected to the inner wall of the accommodating groove, and the other end of the torsion spring 93 is connected to the cam 92;

[0124] A contact part 94 is arranged on the cam 92. In the initial state of the cam 92, the contact part 94 extends out of the accommodating groove. When the rotating door 14 is closed, the contact part 94 is squeezed, causing the cam 92 to rotate and retract into the accommodating groove. When the rotating door 14 is opened, the torsion spring 93 drives the cam 92 to reset, so that the contact part 94 generates a thrust on the rotating door 14.

[0125] The working principle of this embodiment is as follows:

[0126] The above-mentioned methods improve security and avoid, as much as possible, illegal personnel from opening the placement board 11 to damage the electrical appliances inside. However, the most crucial problem is that the revolving door 14 can still be opened, and there is still a risk of the second passage 48 being discovered after the revolving door 14 is opened, that is, the partition board 7 may still be raised.

[0127] Therefore, a self-locking component 8 that restricts the revolving door 14 is provided. Under abnormal operation, when the main lock core 41 is rotated counterclockwise by 90 degrees, the position of the main lock core 41 is fixed. At this time, when trying to open the revolving door 14 for the next operation, the external key 51 inserted into the main lock core 41 needs to be pulled out. After the external key 51 is pulled out, the main lock core 41 fixed at the 90-degree rotation position hides the second passage 48. It should be noted in this process that after rotating counterclockwise by 90 degrees, the alignment problem of the second passage 48 cannot be processed without opening the revolving door 14. After knowing that rotating counterclockwise by 45 degrees can align the first passage 44 and the second passage 48, without the composite key 5, it is impossible to operate without opening the revolving door 14. Therefore, without the composite key 5, even if illegal personnel know how to align the first passage 44 and the second passage 48, they must open the revolving door 14 to completely release the limit of the limit sleeve 15 from the main lock core 41.

[0128] When operating the revolving door 14 in the case where the revolving door 14 must be opened, it will drive the switch shaft 111 for realizing the rotation of the revolving door 14 to rotate synchronously. The rotation of the switch shaft 111 drives the second driving gear 84 to rotate. The rotation of the second driving gear 84 and the second driven gear 85 meshes to realize the rotation of the rotating rod 86. When the rotating rod 86 rotates, it drives the first limiting ring 83 to generate an angular offset. Since the alignment problem of the first passage 44 and the second passage 48 needs to be processed by opening the revolving door 14, the partition board 7 does not move at this time. Therefore, the second transmission sleeve 613 and the mounting plate 81 do not move either. Under the angular offset of the second limiting ring 87, it contacts the fixed rod 82 inside the mounting plate 81 in the initial state. A first limiting ring 83 is also provided on the fixed rod 82. At this time, the second limiting ring 87 contacts both the fixed rod 82 and the first limiting ring 83, and the second limiting ring 87 is located above the first limiting ring 83. At this time, the revolving door 14 cannot be opened further, and even if the first passage 44 and the second passage 48 are aligned by force, the partition board 7 cannot be raised under the restriction of the second limiting ring 87. It should be noted that the allowable opening degree of the revolving door 14 is controlled by the initial position of the second limiting ring 87. The closer the initial position of the second limiting ring 87 is to the fixed rod 82, the greater the restriction on the opening degree of the revolving door 14, but the initial position of the second limiting ring 87 cannot be directly in contact with the fixed rod 82, as this will affect the operator's normal raising of the partition board 7.

[0129] When the revolving door 14 can only be slightly opened, after an illegal person closes the revolving door 14 again, without the composite key 5, it is still impossible to damage the internal electrical appliances. When not closing the revolving door 14 again and trying to move the main lock core 41 to the state where the first channel 44 and the second channel 48 are aligned by force, the main lock core 41 without magnetic attraction restriction automatically resets to the vertically downward state under the action of the return spring 45. At this time, the first channel 44 and the second channel 48 are still not aligned. Or after the magnetic attraction is released, a supporting force is continuously provided to the main lock core 41 so that it will not automatically reset under the drive of the return spring 45, and finally the second channel 48 is opened. However, since the main lock core 41 is at the position rotated counterclockwise by 45 degrees in the initial state at this time, this position interferes with the limit sleeve 15, and it is impossible to close the revolving door 14 when the main lock core 41 is in this position. If the revolving door 14 is not closed, the partition 7 still cannot be raised. The above settings prevent illegal persons from opening the revolving door 14 and the partition 7 simultaneously through an interlocking method. It should be noted that when the revolving door 14 has been slightly opened due to the illegal operation of an illegal person, but the main lock core 41 is in the vertically downward state due to the automatic reset of the return spring 45 and cannot normally close the revolving door 14, it can be solved by maintenance and will not cause the equipment to be unable to continue to be used;

[0130] To prevent illegal persons from having enough time to further consider strategies after opening the revolving door 14, a docking plate 88 is provided on the second limiting ring 87, and an infrared receiver 89 is provided on the docking plate 88. The infrared receiver 89 can be powered continuously by a battery, and the power supply part can be set on the docking plate 88, but it cannot be externally powered outside the protective shell 1. Therefore, the infrared receiver 89 needs to rotate with the rotating rod 86. An infrared emitter 810 and a control box 811 are installed inside the mounting plate 81. A power supply group, a controller, and a buzzer are provided inside the control box 811. The power supply group powers the electrical appliances other than the infrared receiver 89. Similarly, since the mounting plate 81 needs to move, it cannot be externally powered either. The infrared emitter 810 continuously emits light beams. When an illegal person opens the rotation without raising the partition 7, the second limiting ring 87 contacts the fixed rod 82. After rotation, the second limiting ring 87 drives the position of the infrared receiver 89 to change. After the position changes, the infrared receiver 89 is opposite to the infrared emitter 810. After receiving the light beam of the infrared emitter 810, the infrared receiver 89 feeds back a signal to the controller, and the controller starts the buzzer to work. The sounding of the buzzer can alert the staff and deter illegal persons. At the same time, a remote alarm system can also be set inside the control box 811. The connection between these components is prior art and will not be described in detail here;

[0131] To prevent illegal personnel from unlocking the restriction between the main lock core 41 and the limit sleeve 15 after turning the main lock core 41 counterclockwise by 90 degrees and then not opening the revolving door 14, but thinking about subsequent strategies for a long time, in this case, the buzzer cannot be triggered as soon as possible. Therefore, a cam 92 is provided. When the revolving door 14 is closed, it will squeeze the contact part 94 of the cam 92, forcing the drive shaft 91 and the cam 92 to rotate, and at the same time twisting the torsion spring 93, so that the entire cam 92 is retracted into the left baffle 12. When the restriction between the main lock core 41 and the limit sleeve 15 is released, as long as the outer key 51 inserted into the main lock core 41 is pulled out, if the revolving door 14 is not firmly held by hand at this time, the unrestricted cam 92 will be reset through the reset of the torsion spring 93. During the reset process, the cam 92 rotates, and the contact part 94 of the cam 92 generates a thrust on the revolving door 14, forcing the revolving door 14 to be slightly pushed open, triggering the alarm of the buzzer and the restricting effects of the first limiting ring 83 and the fixing rod 82;

[0132] In summary, to access the internal electrical appliances, one needs to clearly understand the methods of opening the revolving door 14 and the partition 7, and at the same time, the cooperation of the composite key 5 is required. Even if the separate outer key 51 and inner key 53 are matched, it is difficult to operate. The following is the correct opening method for the operator:

[0133] Insert the outer key 51 into the main lock core 41, drive the main lock core 41 to rotate counterclockwise by 45 degrees to align the first channel 44 and the second channel 48. Without pulling out the held outer key 51, directly insert the combined inner key 53 into the third channel 62 to dock with the driving bevel gear 61. After docking, drive the lifting mechanism 6 to start, raise the partition 7. After the partition 7 is raised, retract the inner key 53 into the outer key 51. At this time, continue to rotate the main lock core 41 until the magnetic attraction part 18 and the magnetic attraction plate 17 are attracted to each other, and then open the revolving door 14. At this time, the mounting plate 81 will not trigger the self-locking component 8 following the raising of the partition 7. On the contrary, when the revolving door 14 and the partition 7 need to be closed, first close the revolving door 14, press the revolving door 14 by hand to prevent it from being pushed by the cam 92, then insert the outer key 51 into the main lock core 41. With the restriction of the outer key 51, the hand pressing the revolving door 14 can be released. At this time, the cam 92 cannot push the revolving door 14. Then rotate the main lock core 41 to disconnect the adsorption effect, rotate to the 45-degree position, insert the inner key 53, reverse the inner key 53 to lower the partition 7 to reset. After resetting, retract the inner key 53 into the outer key 51, and then pull out the outer key 51. Without the restriction of the outer key 51, the return spring 45 drives the main lock core 41 to move vertically downward, locking the limit sleeve 15 and closing the alignment state of the first channel 44 and the second channel 48 at the same time. It should be noted that when rotating to the 45-degree position, it is already inside the limit sleeve 15, which can achieve the effect of closing the revolving door 14.

[0134] In the above-described specific embodiments, the technical problems solved by the present invention, the technical solutions and the beneficial effects have been further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electric energy metering box with a security structure, characterized in that, Comprising: A protective case (1), the protective case (1) includes a placement plate (11) provided with an opening, a left baffle (12) and a right baffle (13) connected to the placement plate (11), and a revolving door (14) rotatably arranged on the right baffle (13), and a limit sleeve (15) is arranged inside the revolving door (14); A partition plate (7) slidably arranged in the placement plate (11), a storage space is formed between the partition plate (7) and the closed surface of the placement plate (11), and a power meter (2) and an air switch (3) are installed in the storage space; A lifting mechanism (6) arranged in the left baffle (12), the lifting mechanism (6) is connected to the partition plate (7); A composite lock core (4) arranged on the left baffle (12), the composite lock core (4) includes a rotatably arranged main lock core (41) and a fixedly arranged auxiliary lock disc (46), a first channel (44) is opened in the main lock core (41), and a second channel (48) is opened in the auxiliary lock disc (46); A composite key (5), the composite key (5) includes an outer key (51) and an inner key (53) movably arranged in the outer key (51), the outer key (51) is adapted to be inserted into and rotate the main lock core (41) to change the cooperation relationship between the main lock core (41) and the limit sleeve (15), thereby controlling the opening and closing state of the revolving door (14), and the inner key (53) is adapted to pass through the first channel (44) and the second channel (48) and dock with the lifting mechanism (6) when the main lock core (41) is rotated to make the first channel (44) communicate with the second channel (48).

2. The electricity metering box with a security structure according to claim 1, characterized in that The main lock core (41) is rotatably arranged on the left baffle (12) and passes through the left baffle (12), a limit portion (43) is arranged on the main lock core (41) outside the left baffle (12), when the main lock core (41) is rotated so that the limit portion (43) is located inside the limit sleeve (15), the revolving door (14) is in a closed state, and when the main lock core (41) is rotated so that the limit portion (43) is located outside the limit sleeve (15), the revolving door (14) is in an open state; The end surface of the main lock core (41) inside the left baffle (12) is connected to one end of the auxiliary lock disc (46) through a rotating shaft, and a support plate (47) is connected inside the left baffle (12), and one side of the support plate (47) is fixedly connected to the other end of the auxiliary lock disc (46).

3. The electric energy metering box with a security structure according to claim 2, characterized in that, A return spring (45) is sleeved on the part of the main lock core (41) inside the left baffle (12), and both ends of the return spring (45) are connected to the outer peripheral surface of the main lock core (41) and the inner wall of the left baffle (12) respectively; A limiting plate (16) is arranged inside the limit sleeve (15), the limiting plate (16) is adapted to limit the limit position of the limit portion (43) rotating clockwise to be vertically downward, when the limit portion (43) is vertically downward, it is located inside the limit sleeve (15), and the return spring (45) will not be distorted; A magnetic attraction plate (17) is provided on the left baffle (12), a magnetic attraction part (18) is provided on the limiting part (43), and the magnetic attraction plate (17) is adapted to attract the magnetic attraction part (18) when the limiting part (43) rotates counterclockwise by 90 degrees from the vertically downward state, and is located outside the limiting sleeve (15) when the limiting part (43) is rotated counterclockwise by 90 degrees. When the limiting part (43) is vertically downward, the first channel (44) is not communicated with the second channel (48). When the limiting part (43) is in the position rotated counterclockwise by 45 degrees from the vertically downward state, the first channel (44) and the second channel (48) are completely communicated. When the magnetic attraction part (18) attracts the magnetic attraction plate (17), the first channel (44) and the second channel (48) are not communicated.

4. The electric energy metering box with a security structure according to claim 2 or 3, characterized in that, The lifting mechanism (6) includes a driving bevel gear (61), a driven bevel gear (64), a connecting rod (65), a first driving gear (66), a first driven gear (67), a threaded rod (68) and a first transmission sleeve (69). The driving bevel gear (61) is rotatably installed on the other side of the support plate (47). A third channel (62) is opened in the driving bevel gear (61). A docking hole penetrating through itself is opened in the support plate (47), and the third channel (62) is always in a communicated state with the second channel (48). The connecting rod (65) is rotatably installed in the left baffle (12). The driven bevel gear (64) is fixedly sleeved on the outer peripheral surface of the connecting rod (65). The driven bevel gear (64) meshes with the driving bevel gear (61). The threaded rod (68) is rotatably installed in the left baffle (12). The first driving gear (66) is fixedly sleeved on the outer peripheral surface of the connecting rod (65). The first driven gear (67) is fixedly sleeved on the outer peripheral surface of the threaded rod (68). The first driving gear (66) meshes with the first driven gear (67). The first transmission sleeve (69) is assembled outside the threaded rod (68). A first sliding groove is opened in the placing plate (11), and the first sliding groove is communicated with the inside of the left baffle (12). The first transmission sleeve (69) passes through the first sliding groove and is connected to the partition plate (7). The inner key (53) is adapted to pass through the first channel (44) and the second channel (48) and insert into the third channel (62) when the first channel (44) and the second channel (48) are communicated, thereby driving the driving bevel gear (61) to rotate, so as to control the lifting state of the partition plate (7). Two slide rails (610) are arranged in the placing plate (11), and the partition plate (7) is slidably arranged in the slide rails (610).

5. The electric energy metering box with a security structure according to claim 4, characterized in that, A guide rod (612) is fixedly arranged inside the right baffle (13). A second transmission sleeve (613) is slidably arranged outside the guide rod (612). A second chute is formed inside the placement plate (11). The second chute communicates with the inside of the right baffle (13). The second transmission sleeve (613) passes through the second chute and is connected to the partition plate (7). A groove (611) is formed inside the slide rail (610). A convex block (73) is arranged on the partition plate (7). The convex block (73) is inserted into the groove (611). A cavity is formed inside the partition plate (7). A plurality of second heat dissipation holes (72) are formed on one side of the partition plate (7) close to the electricity meter (2). The second heat dissipation holes (72) communicate with the cavity. A first heat dissipation hole (71) is formed at the top of the partition plate (7). The first heat dissipation hole (71) communicates with the cavity. A through groove is formed at the top of the placement plate (11). The partition plate (7) is adapted to move through the through groove towards the outside of the placement plate (11).

6. The electric energy metering box with a security structure according to claim 5, characterized in that, A mating groove (42) is formed on the part of the main lock core (41) located outside the left baffle (12). A mating part (52) is arranged outside the outer key (51). The mating part (52) is adapted to be inserted into the mating groove (42) to drive the main lock core (41) to rotate. An activity groove is formed inside the outer key (51). The inner key (53) is movably arranged in the activity groove. A connecting block (515) is arranged on the outer peripheral surface of the inner key (53). A straight groove (54) is formed inside the activity groove. When the inner key (53) moves linearly in the activity groove, the connecting block (515) slides in the straight groove (54). An outer ring groove (56) is formed inside the activity groove. The outer ring groove (56) communicates with the straight groove (54). When the inner key (53) moves linearly in the activity groove until the connecting block (515) enters the outer ring groove (56), the outer ring groove (56) provides a space for the inner key (53) to rotate in the activity groove. A connecting sleeve (57) is rotatably arranged outside the inner key (53). A bracket (59) is arranged on the outer key (51). A telescopic spring (58) is sleeved outside the inner key (53). Two ends of the telescopic spring (58) are respectively connected to the bracket (59) and the connecting sleeve (57). An inner ring groove (55) is formed inside the activity groove. The inner ring groove (55) communicates with the straight groove (54). When the inner key (53) moves in the activity groove, the connecting sleeve (57) moves in the inner ring groove (55). A handle (516) is arranged on the inner key (53).

7. The electric energy metering box with a security structure according to claim 6, characterized in that, The first channel (44), the second channel (48), the third channel (62) and the docking hole are all round holes with the same size. The inner key (53) is a cylinder. At least one clamping groove (63) is formed in the third channel (62). A contraction groove corresponding to the clamping groove (63) is formed in a part of the inner key (53) that needs to be inserted into the third channel (62). A spring telescopic rod (510) is arranged in the contraction groove. A clamping block (511) is connected to the telescopic end of the spring telescopic rod (510). A blocking part (512) is arranged on the contraction groove. The blocking part (512) is adapted to limit the clamping block (511) from completely extending out of the inner key (53). The clamping block (511) is adapted to follow the inner key (53) to be inserted into the third channel (62) and extend into the clamping groove (63) in the third channel (62), so that the inner key (53) is docked with the driving bevel gear (61). A first arc part (513) is arranged on the clamping block (511). A second arc part (514) is formed in the moving groove. A third arc part (49) is arranged on the support plate (47).

8. The electricity meter box with a security structure according to claim 5 or 6 or 7, characterized in that, It further includes a self-locking component (8). The self-locking component (8) includes a mounting plate (81), a fixed rod (82), a second driving gear (84), a second driven gear (85), and a rotating rod (86). An upper fixing plate (19) and a lower fixing plate (110) are arranged on the right baffle (13). A switch shaft (111) is rotatably installed between the upper fixing plate (19) and the lower fixing plate (110). The revolving door (14) is fixedly sleeved outside the switch shaft (111). One end of the switch shaft (111) passes through and extends into the lower fixing plate (110). The second driving gear (84) is fixedly sleeved on the part of the switch shaft (111) located in the lower fixing plate (110). The rotating rod (86) is rotatably installed in the right baffle (13). The second driven gear (85) is fixedly sleeved on the rotating rod (86). The second driving gear (84) meshes with the second driven gear (85). The mounting plate (81) is connected to the second transmission sleeve (613). The fixed rod (82) is fixedly connected in the mounting plate (81). A first limiting ring (83) is fixedly sleeved on the fixed rod (82). A second limiting ring (87) is fixedly sleeved on the rotating rod (86). The mounting plate (81) is adapted to move along with the partition plate (7). When the partition plate (7) is completely located in the placing plate (11) and does not move upward, the revolving door (14) is rotated to open, driving the second limiting ring (87) to rotate towards the fixed rod (82) and contact with the first limiting ring (83) and the fixed rod (82). The second limiting ring (87) is located above the first limiting ring (83), so that the revolving door (14) cannot be completely opened and the partition plate (7) cannot move upward.

9. The electricity metering box with a security structure according to claim 8, characterized in that, A docking plate (88) is connected to the second limiting ring (87). An infrared receiver (89) is installed on the docking plate (88). An infrared emitter (810) and a control box (811) are installed in the mounting plate (81). A buzzer, a controller and a power supply group are arranged in the control box (811). The power supply group is connected to the infrared emitter (810). The infrared receiver (89) is adapted to correspond to the position of the infrared emitter (810) and receive the light beam emitted by the infrared emitter (810) when the second limiting ring (87) contacts the fixed rod (82), and then feedback a signal to the controller. The controller drives the buzzer after receiving the signal.

10. The electric energy metering box with a security structure according to claim 9, characterized in that, A plurality of accommodating grooves arranged at intervals are formed in the left baffle (12). A pushing assembly is arranged in the accommodating groove. The pushing assembly includes a driving shaft (91), a cam (92) and a torsion spring (93). The driving shaft (91) is rotatably installed in the accommodating groove. The cam (92) is fixedly sleeved outside the driving shaft (91). The torsion spring (93) is sleeved on the driving shaft (91). One end of the torsion spring (93) is connected to the inner wall of the accommodating groove, and the other end of the torsion spring (93) is connected to the cam (92). A contact portion (94) is arranged on the cam (92). In the initial state of the cam (92), the contact portion (94) extends out of the accommodating groove. When the revolving door (14) is closed, the contact portion (94) is squeezed, so that the cam (92) rotates and retracts into the accommodating groove. When the revolving door (14) is opened, the torsion spring (93) drives the cam (92) to reset, so that the contact portion (94) generates a thrust on the revolving door (14).

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