Safety type electric energy metering box

Abstract

The invention relates to the technical field of metering boxes, in particular to a safety type electric energy metering box which comprises a metering box body, one end of the metering box body is fixedly connected with a butt joint sleeve, electrical parts can be installed through the metering box body, then current is metered, and when the metering box body needs to be connected with the outside, the butt joint sleeve is fixedly connected with the butt joint sleeve. The butt joint rod is inserted into the butt joint sleeve, and the plurality of power connection terminals are sleeved on the plurality of power transmission terminals, so that the current in the metering box body can be transmitted to the conductive cable through the power transmission terminals, the power connection terminals and the butt joint rod, and then is transmitted to the outer side through the conductive cable, and when the butt joint rod is inserted into the butt joint sleeve, the current in the metering box body can be transmitted to the outer side through the conductive cable. The butt-joint sleeve and the butt-joint rod are preliminarily fixed through the fastening mechanism, when current transmitted by the power transmission terminal is too large, fixation is relieved through the clamping mechanism, the pushing disc is pushed outwards through natural elastic expansion of the plastic spring, then the butt-joint rod is pushed outwards, the power connection terminal is separated from the power transmission terminal, and power-off protection during overload is completed.

Description

Technical Field

[0001] This invention relates to the field of metering box technology, specifically a safety-type electricity metering box. Background Technology

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

[0003] Currently, most common current metering box terminals adopt traditional bolt-fastened or plug-in structures. The core function of these terminals is to achieve mechanical fixation and conductive conduction of electrical connections. Their design focuses on ensuring low contact resistance, high mechanical strength, and good anti-loosening performance. However, existing terminals are essentially passive connection points. When the circuit is overloaded, the current will far exceed the rated value, causing the terminal and connected conductor to heat up rapidly. Since the terminal itself does not have the ability to detect and disconnect, if no subsequent treatment is done, heat will continue to accumulate, which can easily cause insulation carbonization, metal melting, or even electrical fires, posing a serious threat to equipment and personal safety. Summary of the Invention

[0004] The purpose of this invention is to provide a safe electricity metering box to solve the problem mentioned in the background art that the power connection terminal cannot quickly separate from the external power connection terminal when overloaded, resulting in a continuous rise in temperature and thus posing a safety hazard.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A safety-type electricity metering box includes a metering box body. A docking sleeve is fixedly connected to one end of the metering box body. Multiple power transmission terminals are fixedly connected to the inner wall of one side of the docking sleeve. A docking rod is movably inserted into the docking sleeve. Multiple power receiving terminals are fixedly connected to one end of the docking rod. The multiple power receiving terminals are respectively sleeved on the circumferential surface of the multiple power transmission terminals. A conductive cable is fixedly connected to one end of the docking rod. Two sets of fastening mechanisms and clamping mechanisms are symmetrically arranged inside the docking sleeve. The fastening mechanisms are used to improve the tightness of the insertion and connection between the power receiving terminals and the power transmission terminals. The clamping mechanisms are magnetically connected to the fastening mechanisms and are used to clamp the conductive cable by magnetic repulsion when the current is turned on.

[0006] Furthermore, a plastic spring is fixedly connected to one side of the inner wall of the docking sleeve, and a pusher plate is fixedly connected to one end of the plastic spring.

[0007] Furthermore, each set of fastening mechanisms comprises a sliding groove, a sliding block, a movable groove, a snap-fit ​​spring, an electromagnet snap-fit ​​block, a pull-back assembly, and a snap-fit ​​groove. The sliding groove is formed on the inner wall of the mating sleeve. The sliding block is fixedly connected to the circumferential surface of the mating rod and slidably connected within the sliding groove. The movable groove is formed at the upper end of the sliding block. The snap-fit ​​spring is fixedly connected to the bottom surface of the movable groove. The electromagnet snap-fit ​​block is fixedly connected to the upper end of the snap-fit ​​spring. The snap-fit ​​groove is formed on the lower inner wall of the sliding groove and engages with the electromagnet snap-fit ​​block. The pull-back assembly is located within the sliding block and is electrically connected to the conductive cable. It is used to pull back the electromagnet snap-fit ​​block and disengage it from the snap-fit ​​groove by the deformation caused by temperature changes when the circuit current is overloaded.

[0008] Furthermore, the pull-back assembly consists of a pull-back plate, a pull-back groove, and a pulling rod. The pull-back groove is formed inside the sliding block and is connected to the movable groove. The pulling rod is fixedly connected to the lower end of the electromagnet locking block, and the lower end of the pulling rod movably passes through the movable groove and extends into the interior of the pull-back groove. The two ends of the pull-back plate are respectively fixedly connected to the bottom surface of the pull-back groove and the lower end of the pulling rod.

[0009] Furthermore, each clamping mechanism consists of a clamping rod, a hoop, a lever, a insertion slot, and a permanent magnet insertion rod. The insertion slot is opened at one end of the mating sleeve. The lever is rotatably connected to the circumferential surface of the mating sleeve via a rotating shaft. The clamping rod is integrally formed at one end of the lever. The hoop is fixedly connected to one end of the clamping rod. The permanent magnet insertion rod is fixedly connected to one end of the lever and is movably inserted into the insertion slot. The permanent magnet insertion rod and the electromagnet locking block are magnetically connected and repel each other when energized.

[0010] Furthermore, limit grooves are provided on both inner walls of the pull-back groove, and two limit blocks are fixedly connected to the circumferential surface of the pull rod, with the two limit blocks slidably connected in the two limit grooves respectively.

[0011] Furthermore, a sealing door is movably hinged to one end of the metering box body, and a door lock is provided at one end of the sealing door.

[0012] Furthermore, the inner circumferential wall of the hoop is integrally formed with multiple anti-slip rods.

[0013] The technical solution provided by this invention has the following advantages compared with the known prior art: 1. Electrical components can be installed through the metering box body, and then the current can be measured. When it is necessary to connect the metering box body to the outside, the docking rod is inserted into the docking sleeve, and multiple connecting terminals are sleeved onto multiple transmission terminals. The current in the metering box body can be transmitted to the conductive cable through the transmission terminals, connecting terminals, and docking rod, and then transmitted to the outside by the conductive cable. When the docking rod is inserted into the docking sleeve, the docking sleeve and docking rod are initially fixed by the fastening mechanism. When the current transmitted to the transmission terminal is too large, the fixing is released by the clamping mechanism, and the push plate is pushed outward by the natural elasticity of the plastic spring, which in turn pushes the docking rod outward, so that the connecting terminal is detached from the transmission terminal, thus completing the power-off protection in case of overload. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 This is a front perspective view of the present invention; Figure 2 This is a perspective view of the main cross-section of the present invention; Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle; Figure 4 For the present invention Figure 3 A magnified view of a section at point B in the middle; Figure 5 This is a rear perspective view of the present invention; Figure 6 For the present invention Figure 5 A magnified view of a section at point C.

[0016] In the diagram: 1. Metering box body; 101. Sealing door; 2. Connecting sleeve; 201. Power transmission terminal; 202. Connecting rod; 203. Power connection terminal; 204. Conductive cable; 3. Plastic spring; 301. Pushing disc; 4. Clamping rod; 401. Hoop; 402. Lever; 403. Permanent magnet plug rod; 5. Sliding groove; 501. Sliding block; 502. Movable groove; 503. Snap-fit ​​spring; 504. Electromagnet snap-fit ​​block; 505. Snap-fit ​​groove; 506. Pull rod; 507. Limit groove; 508. Limit block; 509. Retract groove; 510. Retract plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] The present invention will be further described below with reference to embodiments.

[0019] Example: A safety-type electricity metering box, such as Figures 1-6 As shown, the device includes a metering box body 1. A docking sleeve 2 is fixedly connected to one end of the metering box body 1. Multiple power transmission terminals 201 are fixedly connected to the inner wall of one side of the docking sleeve 2. A docking rod 202 is movably inserted into the docking sleeve 2. Multiple power receiving terminals 203 are fixedly connected to one end of the docking rod 202. The multiple power receiving terminals 203 are respectively sleeved on the circumferential surface of the multiple power transmission terminals 201. A conductive cable 204 is fixedly connected to one end of the docking rod 202. Two sets of fastening mechanisms and clamping mechanisms are symmetrically arranged inside the docking sleeve 2. The fastening mechanism is used to improve the tightness of the insertion and engagement of the power receiving terminals 203 and the power transmission terminals 201. The clamping mechanism is magnetically connected to the fastening mechanism and is used to clamp the conductive cable 204 by magnetic repulsion when the current is turned on. A plastic spring 3 is fixedly connected to one side of the inner wall of the docking sleeve 2, and a pusher plate 301 is fixedly connected to one end of the plastic spring 3; Each fastening mechanism consists of a sliding groove 5, a sliding block 501, a movable groove 502, a snap-fit ​​spring 503, an electromagnet snap-fit ​​block 504, a pull-back assembly, and a snap-fit ​​groove 505. The sliding groove 5 is opened on the inner wall of the docking sleeve 2. The sliding block 501 is fixedly connected to the circumferential surface of the docking rod 202 and is slidably connected in the sliding groove 5. The movable groove 502 is opened at the upper end of the sliding block 501. The snap-fit ​​spring 503 is fixedly connected to the bottom surface of the movable groove 502. The electromagnet snap-fit ​​block 504 is fixedly connected to the upper end of the snap-fit ​​spring 503. The snap-fit ​​groove 505 is opened on the lower inner wall of the sliding groove 5 and is snap-fitted with the electromagnet snap-fit ​​block 504. The pull-back assembly is located in the sliding block 501 and is electrically connected to the conductive cable 204. It is used to pull back the electromagnet snap-fit ​​block 504 and disengage it from the snap-fit ​​groove 505 by the deformation caused by the temperature change when the circuit current is overloaded. The pull-back assembly consists of a pull-back plate 510, a pull-back groove 509, and a pull rod 506. The pull-back groove 509 is opened inside the sliding block 501 and is connected to the movable groove 502. The pull rod 506 is fixedly connected to the lower end of the electromagnet latching block 504, and the lower end of the pull rod 506 movably passes through the movable groove 502 and extends into the interior of the pull-back groove 509. The two ends of the pull-back plate 510 are fixedly connected to the bottom surface of the pull-back groove 509 and the lower end of the pull rod 506, respectively. Each clamping mechanism consists of a clamping rod 4, a hoop 401, a lever 402, an insertion slot, and a permanent magnet insertion rod 403. The insertion slot is opened at one end of the docking sleeve 2. The lever 402 is rotatably connected to the circumferential surface of the docking sleeve 2 via a rotating shaft. The clamping rod 4 is integrally formed at one end of the lever 402. The hoop 401 is fixedly connected to one end of the clamping rod 4. The permanent magnet insertion rod 403 is fixedly connected to one end of the lever 402, and the permanent magnet insertion rod 403 is movably inserted into the insertion slot. The permanent magnet insertion rod 403 and the electromagnet locking block 504 are magnetically connected and repel each other when energized.

[0020] The docking rod 202 integrates a current sensor and a controller. The current sensor is electrically connected to the docking rod 202, the controller is signal-connected to the current sensor, and the controller is signal-connected to the permanent magnet plug rod 403.

[0021] In a specific embodiment of the present invention, electrical components can be installed through the metering box body 1, and then the current can be measured. When it is necessary to connect the metering box body 1 to the outside, the docking rod 202 is inserted into the docking sleeve 2, and multiple electrical terminals 203 are sleeved onto multiple power transmission terminals 201. The current in the metering box body 1 can be transmitted to the conductive cable 204 through the power transmission terminal 201, electrical terminal 203, and docking rod 202, and then transmitted to the outside by the conductive cable 204. When the docking rod 202 is inserted into the docking sleeve 2, the sliding block 501 will slide to the innermost part through the sliding groove 5. At this time, through the elastic expansion of the snap-fit ​​spring 503, the electromagnet snap-fit ​​block 504 is pushed outward and snapped into the snap-fit ​​groove 505, thereby completing the initial fixation of the docking sleeve 2 and the docking rod 202. Afterwards, the power transmission terminal 201 and the power receiving terminal 203 are energized. When the current passes through the docking rod 202 and the conductive cable 204, the electromagnet clamping block 504 itself will also be energized synchronously. Then the electromagnet clamping block 504 becomes magnetic and generates a repulsive force with the permanent magnet insertion rod 403, pushing the permanent magnet insertion rod 403 outward. Then the lever 402 is pushed upward. The clamping rod 4 at the other end moves downward through the hinge of the pivot point. At the same time, the hoop 401 moves towards the circumferential surface of the conductive cable 204 to clamp the conductive cable 204, further strengthening the tightness of the connection between the docking rod 202 and the docking sleeve 2. When the current transmitted through the power transmission terminal 201 is too large, the current is transmitted to the current sensor. When the current sensor detects that the current is too large, it transmits a signal to the controller, which then cuts off the power to the electromagnet latch block 504. At this time, the electromagnet latch block 504 will not have magnetism and therefore will not have repulsive force. Since the pivot point of the lever 402 uses an elastic pivot, when the repulsive force is lost, the lever 402 will automatically move downward, thereby moving the clamping rod 4 and the hoop 401 away from the conductive cable 204 and releasing the fixation. At the same time, the pull-back tab 510 and the conductive cable 204 are electrically connected. When the current is too large, the current passing through the pull-back tab 510 will also increase synchronously. Since the resistance of the pull-back tab 510 is constant, its temperature will rise when the current is too large. Moreover, the pull-back tab 510 is a temperature-sensitive memory metal. When the temperature rises, it will begin to contract and pull the pull rod 506 downward, thereby pulling the electromagnet locking block 504 downward and disengaging it from the locking groove 505, thus releasing the fixation in the second step. When the connecting rod 202 is inserted into the connecting sleeve 2, it will compress the plastic spring 3 and the push plate 301, causing the plastic spring 3 to accumulate force. After the fixation is released, the reaction force generated by the deformation of the plastic spring 3 will push the push plate 301 outward, and then push the connecting rod 202 outward, causing the connection terminal 203 to disconnect from the transmission terminal 201, thus completing the power-off protection in case of overload. Through the above design, once the current is overloaded, the transmission terminal 201 and the connection terminal 203 will be quickly disconnected, preventing damage to subsequent electrical appliances, improving safety, and preventing the temperature of the connection terminal from rising, thus preventing a series of safety problems that may be caused by the temperature rise.

[0022] Please refer to the details. Figure 1-6 Limiting grooves 507 are provided on both sides of the inner wall of the pull-back groove 509. Two limiting blocks 508 are fixedly connected to the circumferential surface of the pull rod 506. The two limiting blocks 508 are slidably connected in the two limiting grooves 507 respectively. A sealing door 101 is movably hinged to one end of the metering box body 1, and a door lock is provided at one end of the sealing door 101. The inner circumference of the hoop 401 is integrally formed with multiple anti-slip rods.

[0023] In this embodiment: when the pull rod 506 moves, it can simultaneously drive the two limit blocks 508 to slide in the two limit grooves 507, thereby improving the vertical movement stability of the pull rod 506. The metering box body 1 can be sealed by the sealing door 101. The connection security between the sealing door 101 and the metering box body 1 can be improved by the door lock. The clamping tightness of the clamping ring 401 on the conductive cable 204 can be improved by the multiple anti-slip rods integrally formed on the inner circumference of the hoop 401.

[0024] Working principle: Electrical components can be installed through the metering box body 1, and then the current is measured. When it is necessary to connect the metering box body 1 to the outside, the docking rod 202 is inserted into the docking sleeve 2, and multiple electrical terminals 203 are sleeved onto multiple power transmission terminals 201. The current in the metering box body 1 can be transmitted to the conductive cable 204 through the power transmission terminal 201, electrical terminal 203, and docking rod 202, and then transmitted to the outside by the conductive cable 204. When the docking rod 202 is inserted into the docking sleeve 2, the sliding block 501 will slide to the innermost part through the sliding groove 5. At this time, through the elastic expansion of the snap-fit ​​spring 503, the electromagnet snap-fit ​​block 504 is pushed outward and snapped into the snap-fit ​​groove 505, thereby completing the initial fixation of the docking sleeve 2 and the docking rod 202. Afterwards, the power transmission terminal 201 and the power receiving terminal 203 are energized. When the current passes through the docking rod 202 and the conductive cable 204, the electromagnet clamping block 504 itself will also be energized synchronously. Then the electromagnet clamping block 504 becomes magnetic and generates a repulsive force with the permanent magnet insertion rod 403, pushing the permanent magnet insertion rod 403 outward. Then the lever 402 is pushed upward. The clamping rod 4 at the other end moves downward through the hinge of the pivot point. At the same time, the hoop 401 moves towards the circumferential surface of the conductive cable 204 to clamp the conductive cable 204, further strengthening the tightness of the connection between the docking rod 202 and the docking sleeve 2. When the current transmitted through the power transmission terminal 201 is too large, the current is transmitted to the current sensor. When the current sensor detects that the current is too large, it transmits a signal to the controller, which then cuts off the power to the electromagnet latch block 504. At this time, the electromagnet latch block 504 will not have magnetism and therefore will not have repulsive force. Since the pivot point of the lever 402 uses an elastic pivot, when the repulsive force is lost, the lever 402 will automatically move downward, thereby moving the clamping rod 4 and the hoop 401 away from the conductive cable 204 and releasing the fixation. At the same time, the pull-back tab 510 and the conductive cable 204 are electrically connected. When the current is too large, the current passing through the pull-back tab 510 will also increase synchronously. Since the resistance of the pull-back tab 510 is constant, its temperature will rise when the current is too large. Moreover, the pull-back tab 510 is a temperature-sensitive memory metal. When the temperature rises, it will begin to contract and pull the pull rod 506 downward, thereby pulling the electromagnet locking block 504 downward and disengaging it from the locking groove 505, thus releasing the fixation in the second step. When the connecting rod 202 is inserted into the connecting sleeve 2, it will compress the plastic spring 3 and the push plate 301, causing the plastic spring 3 to accumulate force. After the fixation is released, the reaction force generated by the deformation of the plastic spring 3 will push the push plate 301 outward, and then push the connecting rod 202 outward, causing the connection terminal 203 to disconnect from the transmission terminal 201, thus completing the power-off protection in case of overload. Through the above design, once the current is overloaded, the transmission terminal 201 and the connection terminal 203 will be quickly disconnected, preventing damage to subsequent electrical appliances, improving safety, and preventing the temperature of the connection terminal from rising, thus preventing a series of safety problems that may be caused by the temperature rise.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A safety-type electricity metering box, comprising a metering box body (1), characterized in that: One end of the metering box body (1) is fixedly connected to a docking sleeve (2). A plurality of power transmission terminals (201) are fixedly connected to the inner wall of one side of the docking sleeve (2). A docking rod (202) is movably inserted into the docking sleeve (2). A plurality of power receiving terminals (203) are fixedly connected to one end of the docking rod (202). The plurality of power receiving terminals (203) are respectively sleeved on the circumferential surface of the plurality of power transmission terminals (201). A conductive cable (204) is fixedly connected to one end of the docking rod (202). Two sets of fastening mechanisms and clamping mechanisms are symmetrically arranged in the docking sleeve (2). The fastening mechanism is used to improve the tightness of the insertion and engagement of the power receiving terminals (203) and the power transmission terminals (201). The clamping mechanism is magnetically connected to the fastening mechanism and is used to clamp the conductive cable (204) by magnetic repulsion when the current is turned on.

2. The safety-type electricity metering box according to claim 1, characterized in that: A plastic spring (3) is fixedly connected to one side of the inner wall of the docking sleeve (2), and a pusher plate (301) is fixedly connected to one end of the plastic spring (3).

3. A safety-type electricity metering box according to claim 2, characterized in that: Each fastening mechanism consists of a sliding groove (5), a sliding block (501), a movable groove (502), a snap-fit ​​spring (503), an electromagnet snap-fit ​​block (504), a pull-back assembly, and a snap-fit ​​groove (505). The sliding groove (5) is formed on the inner wall of the mating sleeve (2). The sliding block (501) is fixedly connected to the circumferential surface of the mating rod (202) and is slidably connected in the sliding groove (5). The movable groove (502) is formed at the upper end of the sliding block (501). The snap-fit ​​spring (503) is fixedly connected to the sliding sleeve (202). The electromagnet snap block (504) is fixedly connected to the upper end of the snap spring (503) and connected to the bottom surface of the movable groove (502). The snap groove (505) is opened on the lower inner wall of the sliding groove (5) and the snap groove (505) is snapped into the electromagnet snap block (504). The pull-back assembly is located in the sliding block (501) and is electrically connected to the conductive cable (204). It is used to pull back the electromagnet snap block (504) and disengage it from the snap groove (505) by the deformation caused by the temperature change when the circuit current is overloaded.

4. A safety-type electricity metering box according to claim 3, characterized in that: The pull-back assembly consists of a pull-back plate (510), a pull-back groove (509), and a pull rod (506). The pull-back groove (509) is located inside the sliding block (501), and the pull-back groove (509) and the movable groove (502) are connected. The pull rod (506) is fixedly connected to the lower end of the electromagnet locking block (504), and the lower end of the pull rod (506) moves through the movable groove (502) and extends into the interior of the pull-back groove (509). The two ends of the pull-back plate (510) are fixedly connected to the bottom surface of the pull-back groove (509) and the lower end of the pull rod (506), respectively.

5. A safety-type electricity metering box according to claim 4, characterized in that: Each clamping mechanism consists of a clamping rod (4), a hoop (401), a lever (402), a insertion slot, and a permanent magnet insertion rod (403). The insertion slot is opened at one end of the docking sleeve (2). The lever (402) is rotatably connected to the circumferential surface of the docking sleeve (2) through a rotating shaft. The clamping rod (4) is integrally formed at one end of the lever (402). The hoop (401) is fixedly connected to one end of the clamping rod (4). The permanent magnet insertion rod (403) is fixedly connected to one end of the lever (402), and the permanent magnet insertion rod (403) is movably inserted into the insertion slot. The permanent magnet insertion rod (403) and the electromagnet clamping block (504) are magnetically connected and repel each other when energized.

6. A safety-type electricity metering box according to claim 5, characterized in that: Limiting grooves (507) are provided on both inner walls of the pull-back groove (509). Two limiting blocks (508) are fixedly connected to the circumferential surface of the pull rod (506). The two limiting blocks (508) are slidably connected in the two limiting grooves (507).

7. A safety-type electricity metering box according to claim 6, characterized in that: One end of the metering box body (1) is movably hinged to a sealing door (101), and one end of the sealing door (101) is provided with a door lock.

8. A safety-type electricity metering box according to claim 7, characterized in that: The inner circumference of the hoop (401) is integrally formed with multiple anti-slip rods.

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