Electric energy metering box

Abstract

This invention provides an anti-theft electricity metering box, comprising a transparent box body and an electricity meter assembly disposed within the box body; an anti-theft drive device connected to a mounting base capable of moving the mounting base towards the anti-theft paper, and an anti-theft locking device capable of restricting the movement of the mounting base, the anti-theft locking device having a locked state and a disengaged state; in the locked state, the anti-theft locking device abuts against the mounting base to restrict the movement of the mounting base; in the disengaged state, the anti-theft locking device disengages from the mounting base, allowing the anti-theft drive device to drive a piercing element to pierce the anti-theft paper; the box body can maintain a positive pressure state, when the box body is in a positive pressure state, the anti-theft locking device is in the locked state; when the box body is deflated, the anti-theft locking device switches to the disengaged state. With the above structure, maintenance personnel can directly observe the pierced anti-theft paper through the transparent box body, achieving a warning effect to check for electricity theft.

Description

Technical Field

[0001] This invention relates to electricity metering boxes, specifically to electricity metering boxes designed to prevent electricity theft. Background Technology

[0002] As a key piece of terminal metering equipment in the power system, the security and reliability of electricity metering boxes directly affect the economic benefits of power supply companies and the normal maintenance of electricity consumption order. Traditional electricity metering boxes mostly use mechanical or electronic locks for physical protection and prevent unauthorized opening through lead seals and sealed enclosures. However, these protective measures have significant limitations: mechanical locks are easily pried open or technically opened, and while lead seals provide a one-time sealing effect, they are easily forged or replaced after damage, and cannot record acts of vandalism in real time. Some improvement solutions attempt to introduce electronic alarm systems, such as monitoring the box door status through sensors; however, interference from outdoor environments such as animal activity and rustling grass can easily trigger false alarms, reducing the reliability of the alarm system and weakening the actual protective effect.

[0003] To further enhance protection capabilities, various mechanisms for detecting electricity theft have emerged in existing technologies. For example, current transformers and voltage sensors are used to monitor abnormal electrical parameters, or cameras are used to record activities around the enclosure. While these solutions enable active monitoring, they rely on power supply and complex circuitry, failing in the event of power outages or deliberate damage to communication lines. Furthermore, their high cost hinders widespread adoption. Additionally, some designs employ mechanically triggered alarm devices, such as audible and visual alarms triggered by pressing a switch when the door is opened. However, these structures are easily circumvented and lack concealment; thieves can quickly reset them after tampering with them, leaving no evidence.

[0004] Therefore, there is an urgent need for a simple, low-cost anti-electricity-theft solution that can provide irreversible evidence to make up for the shortcomings of existing technologies. Summary of the Invention

[0005] To overcome the existing technical problems, the present invention provides an anti-theft electricity meter box that can provide irreversible evidence of theft.

[0006] The present invention adopts the following technical solution.

[0007] An anti-theft electricity metering box includes a transparent box and an electricity meter assembly disposed inside the box. It also includes a mounting base that slides inside the box, the mounting base is equipped with a puncture device, the box is also equipped with an anti-theft paper located within the working range of the puncture device, the mounting base is connected to an anti-theft drive device that can drive the mounting base to move toward the anti-theft paper, and an anti-theft locking device that can restrict the movement of the mounting base, the anti-theft locking device having a locked state and a disengaged state. When locked, the anti-theft locking device abuts against the mounting base to restrict the movement of the mounting base; When in the disengaged state, the anti-theft locking device disengages from the mounting base, allowing the anti-theft drive device to drive the piercing element to pierce the anti-theft paper; The enclosure can maintain a positive pressure state, and when the enclosure is under positive pressure, the anti-theft locking device is locked. When the enclosure deflates, the anti-theft locking device switches to the disengaged state.

[0008] As a further improvement of the present invention, the mounting base is provided with a sliding cavity, and a sealing piston is slidably connected in the sliding cavity. The first end of the sealing piston is connected to the puncturing element, and the second end of the sealing piston forms a pressure chamber with the sliding cavity. The pressure chamber communicates with the inside of the box through a vent hole. The first end of the sealed piston is connected to an air bladder, which can contract or expand to move the puncture device closer to or away from the anti-theft paper.

[0009] As a further improvement of the present invention, the housing is connected to a pressurizing device, which includes a hollow pressurizing shell, a pressurizing rod disposed inside the pressurizing shell, a first piston disposed on the pressurizing rod and slidably connected to the pressurizing shell, and a one-way valve disposed on the pressurizing shell and capable of communicating with the outside of the housing. One end of the pressurizing rod is located outside the housing, and the pressurizing shell is also provided with a pressurizing vent hole capable of communicating with the inside of the housing. The enclosure is also equipped with a pressure relief valve.

[0010] As a further improvement of the present invention, the pressurized housing includes a first cavity, a second cavity, and a third cavity, wherein the one-way valve, the first piston, and the pressurized vent are all located in the first cavity; The pressurizing device also includes a second piston disposed on the pressurizing rod and slidably connected to the pressurizing housing, and a reset elastic element disposed on the pressurizing rod and the pressurizing housing. The second piston is located at the connection between the second cavity and the third cavity. It also includes a heat exchange assembly, which includes a heat-releasing structure disposed in the second cavity, a heat-absorbing structure that exchanges heat with the energy meter assembly, and a heat-conducting component connected to the heat-releasing structure and the heat-absorbing structure. When the gas in the second chamber expands due to heat, it drives the pressure rod to move upward through the second piston, and the one-way valve switches to the open state to allow the gas to flow into the first chamber. When the second piston moves into the third chamber, the second chamber connects to the third chamber to reset the pressure rod downward, driving the first piston to pressurize the gas and flow into the box.

[0011] As a further improvement of the present invention, the heat-absorbing structure is attached to the surface of the energy meter assembly, the heat-conducting component has multiple heat-conducting fins on the surface located in the second cavity, and the heat-releasing structure is a liquid.

[0012] As a further improvement of the present invention, the mounting base is provided with a first locking hole and a second locking hole; The anti-theft locking device includes a first locking seat and a second locking seat disposed inside the box, a first locking member and a second locking member slidably disposed on the first locking seat, a locking sliding member capable of pushing the first locking member out of the first lock hole and capable of abutting the second locking member in the second lock hole, a locking piston that is sealed and slidably disposed in the second locking seat and connected to the locking sliding member, and a locking elastic member disposed between the locking piston and the second locking seat. When the box is under positive pressure, the locking elastic element is in a compressed state, the locking sliding element pushes the second locking element into the second lock hole, and pushes the first locking element out of the first lock hole, so that the anti-theft locking device is in a locked state. When the enclosure deflates, the locking elastic element, through the locking piston, drives the locking sliding element to disengage from the first and second locking elements, thereby switching the anti-theft locking device to the disengaged state.

[0013] As a further improvement of the present invention, the anti-theft drive device includes a light rod fixed at both ends in the housing, the mounting base is provided with a mating through hole through which the light rod can pass, and the anti-theft drive device also includes a drive elastic element sleeved on the light rod.

[0014] As a further improvement of the present invention, the box body is provided with a pair of clamping devices for holding the anti-theft paper. The clamping devices include a clamping base and elastic clips disposed on the clamping base.

[0015] The beneficial effects of this invention are as follows: When someone opens the enclosure, the enclosure connects to the outside, and the enclosure, which is under positive pressure, will deflate, causing the anti-theft locking device to switch to the disengaged state, releasing the lock on the mounting base. The anti-theft drive device then drives the piercing element to puncture the anti-theft paper. Maintenance personnel can directly observe the punctured anti-theft paper through the transparent enclosure, achieving a warning effect to check for any electricity theft. The anti-theft paper is printed with a unique anti-counterfeiting code to prevent electricity thieves from replacing it with counterfeit anti-theft paper. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is one of the cross-sectional structural schematic diagrams of the present invention (at this time, the second piston is at the lowest point of its stroke); Figure 3 yes Figure 2 A cross-sectional view along the AA direction; Figure 4 This is the second cross-sectional structural schematic diagram of the present invention (at this time, the second piston is at the highest point of its stroke). Figure 5 This is one of the structural cross-sectional views of the anti-theft locking device of the present invention (at this time, the second locking member is inserted into the second lock hole, and the first locking member is disengaged from the first lock hole). Figure 6 This is the second structural cross-sectional view of the anti-theft locking device of the present invention (at this time, the opening size formed by the piercing element on the anti-theft paper is relatively large). Figure 7 This is the third structural cross-sectional view of the anti-theft locking device of the present invention (at this time, the opening size formed by the piercing element on the anti-theft paper is relatively small).

[0018] Explanation of reference numerals in the attached figures: 1. Housing; 11. Mounting base; 111. Piercing element; 112. Sliding cavity; 113. Sealing piston; 114. Vent hole; 115. Airbag; 116. First lock hole; 117. Second lock hole; 118. Mating through hole; 12. Anti-theft paper; 2. Electricity meter assembly; 3. Anti-theft drive device; 31. Light rod; 32. Drive elastic element; 4. Anti-theft locking device; 41. First locking seat; 42. Second locking seat; 43. First locking element; 44. Second locking element; 45. Locking sliding element; 46. Locking active element 47. Locking elastic element; 5. Pressurizing device; 51. Pressurizing shell; 511. First cavity; 512. Second cavity; 513. Third cavity; 52. Pressurizing rod; 53. First piston; 54. One-way valve; 55. Pressurizing vent; 56. Second piston; 57. Reset elastic element; 58. Heat dissipation fins; 6. Pressure relief valve; 7. Heat exchange assembly; 71. Heat release structure; 72. Heat absorption structure; 73. Heat conduction element; 731. Heat conduction fins; 8. Clamping device; 81. Clamping base; 82. Elastic clamp. Detailed Implementation

[0019] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0020] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Reference Figures 1 to 7 As can be seen, an anti-theft electricity metering box includes a transparent box body 1 and an electricity meter assembly 2 installed inside the box body 1; It also includes a mounting base 11 that is slidably disposed in the housing 1, the mounting base 11 is provided with a puncture element 111, the housing 1 is also provided with an anti-theft paper 12 located within the working range of the puncture element 111, the mounting base 11 is connected to an anti-theft drive device 3 that can drive the mounting base 11 to move toward the anti-theft paper 12, and an anti-theft locking device 4 that can restrict the movement of the mounting base 11, the anti-theft locking device 4 having a locked state and a disengaged state; When locked, the anti-theft locking device 4 abuts against the mounting base 11 to restrict the movement of the mounting base 11; When in the disengaged state, the anti-theft locking device 4 disengages from the mounting base 11, so that the anti-theft driving device 3 drives the piercing piece 111 to pierce the anti-theft paper 12. The enclosure 1 can maintain a positive pressure state. When the enclosure 1 is in a positive pressure state, the anti-theft locking device 4 is in a locked state. When the box 1 is deflated, the anti-theft locking device 4 switches to the disengaged state.

[0022] When someone opens the enclosure 1, it connects to the outside environment. The enclosure 1, which is under positive pressure, will release air, causing the anti-theft locking device 4 to disengage. The anti-theft locking device 4 releases its lock on the mounting base 11, and the anti-theft drive device 3 drives the piercing element 111 to puncture the anti-theft paper 12. Maintenance personnel can directly observe the punctured anti-theft paper 12 through the transparent enclosure 1, serving as a warning to check for electricity theft. The anti-theft paper 12 is printed with a unique anti-counterfeiting code to prevent thieves from replacing it with a counterfeit. After maintenance personnel complete the inspection, they manually reset the mounting base 11 and lock it using the anti-theft locking device 4, then replace the anti-theft paper 12 with a new one.

[0023] Reference Figures 5 to 7 As can be seen, the mounting base 11 is provided with a sliding cavity 112, and a sealing piston 113 is slidably connected in the sliding cavity 112. The first end of the sealing piston 113 is connected to the puncturing member 111, and the second end of the sealing piston 113 forms a pressure chamber with the sliding cavity 112. The pressure chamber is connected to the inside of the box 1 through the vent hole 114. The first end of the sealing piston 113 is connected to an airbag 115, which can contract or expand to move the puncture component 111 closer to or away from the anti-theft paper 12.

[0024] Based on the structure of the airbag 115, it is possible to determine whether the air leakage in the box 1 is due to a small crack or because the box 1 was opened by someone else by observing the state of the anti-theft paper 12. The principle is that when the air pressure in the box is less than the air pressure in the airbag 115, the airbag 115 will continuously expand, thereby pushing the sealing piston 113 to move upward, thus reducing the volume of the pressure chamber, allowing the air in the pressure chamber to be discharged through the vent hole 114, and the effective cross-sectional area of ​​the vent hole 114 is constant.

[0025] When a gap appears in the enclosure, causing pressure to leak, the enclosure 1 deflates slowly, the air pressure in the enclosure decreases gradually, and the locking elastic element 47 gradually recovers, thereby causing the locking sliding element 45 to move downwards. During this process, the air in the pressure chamber is also continuously discharged through the vent hole 114, and the deflating speed of the enclosure 1 is equal to or close to the deflating speed of the pressure chamber, causing the airbag 115 to expand continuously, thereby causing the piercing element 111 to gradually move away from the anti-theft paper 12. When the locking sliding element 45 disengages from the second locking element 44, causing the second locking element 44 to disengage from the second lock hole 117, the driving elastic element 32 drives the mounting base 11 and the piercing element 111 to quickly pierce the anti-theft paper 12. At this time, since the piercing element 111 has already moved a certain distance away from the anti-theft paper 12 under the action of the airbag 115, when the mounting base 11 moves to the lowest end of its stroke, the distance that the piercing element 111 extends from the mounting base is small, resulting in a smaller opening size formed by the piercing element 111 on the anti-theft paper 12.

[0026] When the housing 1 is opened directly, causing air leakage, the leakage speed of the housing 1 is much greater than the leakage speed of the pressure chamber. The locking elastic element 47 quickly returns to its original position, causing the locking sliding element 45 to move downwards rapidly. The locking sliding element 45 disengages from the second locking element 44, causing the second locking element 44 to disengage from the second lock hole 117. This drives the elastic element 32 to drive the mounting base 11 and the piercing element 111 to quickly pierce the anti-theft paper 12. At this time, because the air in the pressure chamber cannot be discharged in time through the vent hole 114, the airbag 115 does not have enough time to inflate. Therefore, when the mounting base 11 moves to the lowest end of its stroke, the piercing element 111 extends a large distance from the mounting base, resulting in a larger opening size formed by the piercing element 111 on the anti-theft paper 12.

[0027] In this situation, maintenance personnel can directly observe whether the air leakage in enclosure 1 is due to a small crack or because enclosure 1 was opened by someone else, without opening enclosure 1.

[0028] Furthermore, if the puncture on the anti-theft paper 12 is small, it suggests that the leakage in the enclosure 1 is due to a minor crack, but it does not necessarily mean that there is no electricity theft. Maintenance personnel need to consider various factors to determine whether the crack is naturally occurring, such as the location, size, and shape of the crack, and check for any potential electricity theft. This is to prevent electricity thieves from artificially creating cracks to create the illusion of leakage before directly opening the enclosure 1 to steal electricity. If the crack is naturally occurring and there is no evidence of electricity theft, the cause and location of the crack can be recorded for subsequent targeted improvements. When checking the location of the crack, the pressure rod 52 of the pressure device 5 can be manually pressed to apply pressure.

[0029] In addition, it should be noted that if the airbag 115 is set at the second end of the sealing piston 113, the effect will be exactly the opposite. When a small crack causes air leakage, the size of the puncture on the anti-theft paper 12 will be larger. However, this result is not conducive to practical use because the hole punctured on the anti-theft paper 12 can be faked from small to large, but it cannot be faked from large to small.

[0030] Reference Figure 1 , Figure 2 and Figure 4 As can be seen, the housing 1 is connected to a pressurizing device 5. The pressurizing device 5 includes a hollow pressurizing shell 51, a pressurizing rod 52 disposed inside the pressurizing shell 51, a first piston 53 disposed on the pressurizing rod 52 and slidably connected to the pressurizing shell 51, and a one-way valve 54 disposed on the pressurizing shell 51 and capable of communicating with the outside of the housing 1. One end of the pressurizing rod 52 is located outside the housing 1. The pressurizing shell 51 is also provided with a pressurizing vent 55 capable of communicating with the inside of the housing 1. The housing 1 is also equipped with a pressure relief valve 6.

[0031] The pressure relief valve 6 prevents excessive air pressure in the housing 1, which could damage some of the structure. When pressurization is required, the pressure lever 52 can be pressed directly, and under the action of the one-way valve 54, gas is continuously pumped into the housing 1 to achieve the pressurization effect.

[0032] Reference Figure 1 , Figure 2 and Figure 4 As can be seen, the pressurized housing 51 includes a first cavity 511, a second cavity 512, and a third cavity 513. The one-way valve 54, the first piston 53, and the pressurized vent 55 are all located in the first cavity 511. The pressurizing device 5 also includes a second piston 56 disposed on the pressurizing rod 52 and slidably connected to the pressurizing housing 51, and a reset elastic element 57 disposed on the pressurizing rod 52 and the pressurizing housing 51. The second piston 56 is located at the connection between the second cavity 512 and the third cavity 513. It also includes a heat exchange assembly 7, which includes a heat-dissipating structure 71 disposed in the second cavity 512, a heat-absorbing structure 72 that exchanges heat with the energy meter assembly 2, and a heat-conducting component 73 connected to the heat-dissipating structure 71 and the heat-absorbing structure 72. When the gas in the second chamber 512 expands due to heat, it drives the pressure rod 52 to move upward through the second piston 56. The one-way valve 54 switches to the open state to allow the gas to flow into the first chamber 511. When the second piston 56 moves into the third chamber 513, the second chamber 512 connects to the third chamber 513 to reset the pressure rod 52 downward, driving the first piston 53 to pressurize the gas and flow into the housing 1.

[0033] When the housing 1 has been used for a long time, some cracks will inevitably appear, leading to air leakage. However, it is not feasible to frequently pressurize by manually pressing the pressure rod 52. Therefore, this technical solution can achieve automatic pressurization by utilizing the heat of the electricity meter component 2. Specifically, refer to... Figure 3 As can be seen, the heat-absorbing structure 72 is attached to the surface of the electricity meter assembly 2, the heat-conducting component 73 has multiple heat-conducting fins 731 on its surface located inside the second cavity 512, and the heat-releasing structure 71 is a liquid. The automatic pressurization principle involves absorbing heat and cooling the energy meter assembly 2 through the heat-absorbing structure 72. The heat is then transferred to the heat-releasing structure 71 located in the second cavity 512 via the heat-conducting component 73. When the temperature reaches a certain level, the heat-releasing structure 71, being a liquid, evaporates some of the vapor to form water vapor, which in turn pressurizes the second cavity 512, pushing the second piston 56 upward. This, in turn, moves the pressurizing rod 52 upward. This process is equivalent to manually pressing the pressurizing rod 52. The one-way valve 54 switches to the open state, and gas flows into the first cavity 511. When the second piston 56 moves into the third cavity 513, the second cavity 512 connects to the third cavity 513. The high-pressure water vapor in the second cavity 512 flows into the third cavity 513, reducing the gas pressure in the second cavity 512. Driven by the reset elastic component 57, the second piston 56 resets, which in turn moves the pressurizing rod 52 downward, causing the first piston 53 to pressurize the gas in the first cavity 511 and flow it into the housing 1. Furthermore, when the high-pressure, high-temperature steam in the second chamber 512 flows into the third chamber 513, the third chamber 513 cools the high-pressure, high-temperature steam, causing it to cool back into liquid. When the second piston 56 moves into the third chamber 513 again, the liquid flows back into the second chamber 512.

[0034] Specifically, the pressurized outer shell 51 is provided with a plurality of heat dissipation fins 58 at the corresponding third cavity 513 to accelerate the cooling of water vapor in the third cavity 513.

[0035] Reference Figures 5 to 7 As can be seen, the mounting base 11 is provided with a first locking hole 116 and a second locking hole 117; The anti-theft locking device 4 includes a first locking seat 41 and a second locking seat 42 disposed inside the housing 1, a first locking member 43 and a second locking member 44 slidably disposed on the first locking seat 41, a locking sliding member 45 capable of pushing the first locking member 43 out of the first lock hole 116 and capable of abutting the second locking member 44 into the second lock hole 117, a locking piston 46 sealed and slidably disposed in the second locking seat 42 and connected to the locking sliding member 45, and a locking elastic member 47 disposed between the locking piston 46 and the second locking seat 42; When the box 1 is under positive pressure, the locking elastic member 47 is in a compressed state, the locking sliding member 45 pushes the second locking member 44 into the second lock hole 117, and pushes the first locking member 43 out of the first lock hole 116, so that the anti-theft locking device 4 is in a locked state. When the housing 1 is deflated, the locking elastic element 47 drives the locking sliding element 45 to disengage from the first locking element 43 and the second locking element 44 through the locking piston 46, so that the anti-theft locking device 4 switches to the disengaged state.

[0036] It should be noted that the engagement of the first lock hole 116 and the first locking member 43 is for manual locking and unlocking via the locking slider 45, while the engagement of the second lock hole 117 and the second locking member 44 is entirely via the locking slider 45. The operating procedure of the anti-theft locking device 4 is as follows: After maintenance is completed, the maintenance personnel hold the lever on the left side of the mounting base 11 and pull the mounting base 11 upward against the elastic force of the driving elastic member 32. At the same time, the first locking member 43 is moved towards the mounting base 11. When the first lock hole 116 corresponds to the first locking member 43, the first locking member 43 is inserted into the first lock hole 116, achieving the effect of manually locking the mounting base 11. Subsequently, replace the anti-theft paper 12, close the door, and manually press the pressure rod 52 to pressurize the gas in the box 1. The air pressure in the box 1 gradually increases, and the locking elastic element 47 is also gradually compressed, which drives the locking sliding element 45 to move upward, push the second locking element 44 into the second lock hole 117, and then move upward a distance to push the first locking element 43 out of the first lock hole 116.

[0037] Reference Figures 5 to 7 As can be seen, the anti-theft drive device 3 includes a light rod 31 with both ends fixed inside the housing 1, and the mounting base 11 is provided with a mating through hole 118 through which the light rod 31 can pass. The anti-theft drive device 3 also includes a drive elastic element 32 sleeved on the light rod 31.

[0038] Reference Figures 5 to 7 As can be seen, the box 1 is provided with a pair of clamping devices 8 for clamping the anti-theft paper 12. The clamping device 8 includes a clamping base 81 and an elastic clip 82 disposed on the clamping base 81.

[0039] When the anti-theft paper 12 needs to be replaced, simply pull out the elastic clip 82 to clamp the anti-theft paper 12 onto the clamping base 81.

[0040] The complete operation process of this invention is as follows: After maintenance is completed, the maintenance personnel hold the lever on the left side of the mounting base 11 to overcome the elastic force of the drive elastic element 32 and pull the mounting base 11 upward. At the same time, the first locking element 43 is moved towards the mounting base 11. When the first locking hole 116 corresponds to the first locking element 43, the first locking element 43 is inserted into the first locking hole 116, thereby achieving the effect of manually locking the mounting base 11. Subsequently, replace the anti-theft paper 12, close the cabinet door, and manually press the pressure lever 52 to pressurize the gas in the cabinet 1. The first piston 53 moves upward, increasing the volume of the first chamber 511, thereby reducing the air pressure in the first chamber 511. This causes the one-way valve 54 to switch to the open state, and the gas flows into the first chamber 511. Under the action of the reset elastic element 57 or by hand, the first piston 53 moves downward, causing the gas in the first chamber 511 to be forced into the cabinet 1 through the pressurized vent 55. Repeat this operation, and the air pressure in the cabinet 1 gradually increases. The locking elastic element 47 is also gradually compressed, causing the locking sliding element 45 to move upward, pushing the second locking element 44 into the second lock hole 117. After moving upward a certain distance, it pushes the first locking element 43 out of the first lock hole 116.

[0041] When the air pressure in the chamber is less than the air pressure in the airbag 115, the airbag 115 will continuously expand, thereby pushing the sealing piston 113 to move upward, thus reducing the volume of the air pressure chamber, allowing the air in the air pressure chamber to be discharged through the vent hole 114, and the effective cross-sectional area of ​​the vent hole 114 is constant.

[0042] When a gap appears in the enclosure, causing pressure to leak, the enclosure 1 deflates slowly, the air pressure in the enclosure decreases gradually, and the locking elastic element 47 gradually recovers, thereby causing the locking sliding element 45 to move downwards. During this process, the air in the pressure chamber is also continuously discharged through the vent hole 114, and the deflating speed of the enclosure 1 is equal to or close to the deflating speed of the pressure chamber, causing the airbag 115 to expand continuously, thereby causing the piercing element 111 to gradually move away from the anti-theft paper 12. When the locking sliding element 45 disengages from the second locking element 44, causing the second locking element 44 to disengage from the second lock hole 117, the driving elastic element 32 drives the mounting base 11 and the piercing element 111 to quickly pierce the anti-theft paper 12. At this time, since the piercing element 111 has already moved a certain distance away from the anti-theft paper 12 under the action of the airbag 115, when the mounting base 11 moves to the lowest end of its stroke, the distance that the piercing element 111 extends from the mounting base is small, resulting in a smaller opening size formed by the piercing element 111 on the anti-theft paper 12.

[0043] When the housing 1 is opened directly, causing air leakage, the leakage speed of the housing 1 is much greater than the leakage speed of the pressure chamber. The locking elastic element 47 quickly returns to its original position, causing the locking sliding element 45 to move downwards rapidly. The locking sliding element 45 disengages from the second locking element 44, causing the second locking element 44 to disengage from the second lock hole 117. This drives the elastic element 32 to drive the mounting base 11 and the piercing element 111 to quickly pierce the anti-theft paper 12. At this time, because the air in the pressure chamber cannot be discharged in time through the vent hole 114, the airbag 115 does not have enough time to inflate. Therefore, when the mounting base 11 moves to the lowest end of its stroke, the piercing element 111 extends a large distance from the mounting base, resulting in a larger opening size formed by the piercing element 111 on the anti-theft paper 12.

[0044] In daily use, when a gap appears in the casing causing pressure loss, the pressurizing device 5 can automatically pressurize the casing. The process involves: the heat-absorbing structure 72 absorbs heat and cools the energy meter assembly 2; the heat is then transferred through the heat-conducting component 73 to the heat-releasing structure 71 located within the second cavity 512. When the temperature reaches a certain level, the heat-releasing structure 71, being a liquid, evaporates some of its liquid, forming water vapor, which pressurizes the second cavity 512, pushing the second piston 56 upwards, thereby causing the pressurizing rod 52 to move upwards. This process is similar to... When the pressure lever 52 is manually pressed, the one-way valve 54 switches to the open state, and gas flows into the first chamber 511. When the second piston 56 moves into the third chamber 513, the second chamber 512 connects to the third chamber 513, and the high-pressure water vapor in the second chamber 512 flows into the third chamber 513. The gas pressure in the second chamber 512 decreases, and under the drive of the reset elastic element 57, the second piston 56 is reset, which in turn drives the pressure lever 52 to move downward, causing the first piston 53 to pressurize the gas in the first chamber 511 and flow it into the housing 1. In addition, when the high-pressure, high-temperature water vapor in the second chamber 512 flows into the third chamber 513, the third chamber 513 cools the high-pressure, high-temperature water vapor, causing it to cool back into liquid. When the second piston 56 moves into the third chamber 513 again, the liquid flows back into the second chamber 512.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An anti-theft electricity metering box, characterized in that, It includes a transparent enclosure and an electricity meter assembly housed inside the enclosure; It also includes a mounting base that is slidably disposed inside the box, the mounting base having a puncture component, and the box containing anti-theft paper within the working range of the puncture component. The mounting base is connected to an anti-theft drive device that can move the mounting base toward the anti-theft paper, and an anti-theft locking device that can restrict the movement of the mounting base. The anti-theft locking device has a locked state and a disengaged state. When in the locked state, the anti-theft locking device abuts against the mounting base to restrict the movement of the mounting base; When in the disengaged state, the anti-theft locking device disengages from the mounting base, allowing the anti-theft driving device to drive the piercing element to pierce the anti-theft paper; The enclosure is under positive pressure, and when the enclosure is under positive pressure, the anti-theft locking device is locked. When the enclosure deflates, the anti-theft locking device switches to the disengaged state; The anti-theft paper is printed with a unique anti-counterfeiting code; The mounting base is provided with a first locking hole and a second locking hole; The anti-theft locking device includes a first locking seat and a second locking seat disposed inside the box, a first locking member and a second locking member slidably disposed on the first locking seat, a locking sliding member capable of pushing the first locking member out of the first lock hole and capable of abutting the second locking member in the second lock hole, a locking piston that is sealed and slidably disposed in the second locking seat and connected to the locking sliding member, and a locking elastic member disposed between the locking piston and the second locking seat. When the box is under positive pressure, the locking elastic element is in a compressed state, the locking sliding element pushes the second locking element into the second lock hole, and pushes the first locking element out of the first lock hole, so that the anti-theft locking device is in a locked state. When the box is deflated, the locking elastic element drives the locking sliding element to disengage from the first locking element and the second locking element through the locking piston, so that the anti-theft locking device switches to the disengaged state; The anti-theft drive device includes a light rod fixed at both ends inside the housing, the mounting base is provided with a mating through hole through which the light rod can pass, and the anti-theft drive device also includes a drive elastic element sleeved on the light rod; When the locking slider disengages from the second locking member, the second locking member disengages from the second lock hole, driving the elastic member to drive the mounting base and the piercing member to pierce the anti-theft paper.

2. The anti-theft electricity metering box according to claim 1, characterized in that, The mounting base is provided with a sliding cavity, and a sealing piston is slidably connected in the sliding cavity. The first end of the sealing piston is connected to the puncturing element, and the second end of the sealing piston forms a pressure chamber with the inner wall of the sliding cavity. The pressure chamber communicates with the inside of the box through a vent hole. The first end of the sealed piston is connected to an air bladder, which can contract or expand to move the puncture device closer to or away from the anti-theft paper.

3. The anti-theft electricity metering box according to claim 1, characterized in that, The housing is connected to a pressurizing device, which includes a hollow pressurizing shell, a pressurizing rod disposed inside the pressurizing shell, a first piston disposed on the pressurizing rod and slidably connected to the pressurizing shell, and a one-way valve disposed on the pressurizing shell and capable of communicating with the outside of the housing. One end of the pressurizing rod is located outside the housing, and the pressurizing shell is also provided with a pressurizing vent that can communicate with the inside of the housing. The enclosure is also equipped with a pressure relief valve.

4. The anti-theft electricity metering box according to claim 3, characterized in that, The pressurized housing includes a first cavity, a second cavity, and a third cavity, and the one-way valve, the first piston, and the pressurized vent are all located in the first cavity; The pressurizing device further includes a second piston disposed on the pressurizing rod and slidably connected to the pressurizing housing, and a reset elastic element disposed on the pressurizing rod and the pressurizing housing, wherein the second piston is located at the connection between the second cavity and the third cavity; It also includes a heat exchange assembly, which includes a heat-releasing structure disposed in the second cavity, a heat-absorbing structure that exchanges heat with the energy meter assembly, and a heat-conducting component connected to the heat-releasing structure and the heat-absorbing structure. When the gas in the second chamber expands due to heat, it drives the pressure rod to move upward through the second piston, and the one-way valve switches to the open state to allow the gas to flow into the first chamber. When the second piston moves into the third chamber, the second chamber connects to the third chamber to allow the pressure rod to return to its original position downward, driving the first piston to pressurize the gas and flow into the box.

5. The anti-theft electricity metering box according to claim 4, characterized in that, The heat-absorbing structure is attached to the surface of the electricity meter assembly, the heat-conducting component has multiple heat-conducting fins on the surface located in the second cavity, and the heat-releasing structure is a liquid.

6. The anti-theft electricity metering box according to claim 1, characterized in that, The box is equipped with a pair of clamping devices for holding the anti-theft paper. The clamping devices include a clamping base and elastic clips disposed on the clamping base.

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