Distribution box

Abstract

The utility model provides a distribution box including a box body, a ground wire, a ground resistance measuring device and a locking device, the locking device is installed on the box body, one end of the ground wire is connected with the box body, the other end of the ground wire is grounded, the ground resistance measuring device is connected with the ground wire, and the locking device is connected with the box body. And the locking device is connected with the grounding resistance measuring equipment.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a distribution box. Background Technology

[0002] Mobile distribution boxes are widely used in temporary power supply and construction sites, making their safety paramount. Poor grounding can lead to accidents such as electric shock and equipment damage. In actual construction, mobile distribution boxes are sometimes used without grounding, posing a significant safety risk and presenting the following problems:

[0003] 1. Lack of automatic locking function: The existing distribution box door can only be manually locked by mechanical lock, which cannot prevent the door from being opened and used when the grounding is poor.

[0004] 2. Significant safety hazards: Poor grounding may lead to operator error, resulting in electric shock or equipment damage. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a distribution box that addresses the shortcomings of the existing technology.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A distribution box includes: a box body, a grounding wire, a grounding resistance measuring device, and a locking device. The locking device is installed on the box body, one end of the grounding wire is connected to the box body, and the other end of the grounding wire is grounded. The grounding resistance measuring device is connected to the grounding wire, and the locking device is connected to the grounding resistance measuring device.

[0007] The beneficial effects of adopting this utility model's technical solution are as follows: The locking device is used to lock or unlock the box door. When the grounding resistance does not meet the requirements, the box door is locked and cannot be opened. Controlling the box door through grounding measurement ensures that the distribution box must be properly grounded before use, thereby improving the safety of the mobile distribution box.

[0008] Furthermore, a door is rotatably installed on one side of the box, and the locking device is installed on the box, or the locking device is installed on the box via the door; a mechanical lock is installed on the door or the box.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are: the interlocking device is installed on the enclosure or door, which facilitates the selection of the installation position of the interlocking device according to actual needs, and facilitates the installation and maintenance of the interlocking device. The mechanical lock is used to ensure that the interlocking device remains unlocked during the use of the distribution box, provided the grounding resistance meets the requirements. The mechanical lock locks the door, preventing unauthorized opening and achieving interlocking during operation.

[0010] Furthermore, the locking device is connected to the grounding resistance measuring device via a control device.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The grounding resistance measuring device is used to measure the grounding resistance value of the distribution box in real time and transmit the measurement result to the control device. The control device is used to receive the data from the grounding resistance measuring device and determine whether the grounding resistance exceeds the set threshold. If it exceeds the threshold, a locking signal is sent to the locking device; if it does not exceed the threshold, an unlocking signal is sent.

[0012] Furthermore, the control device is connected to a power supply device, which is installed inside the enclosure.

[0013] The beneficial effect of adopting the above-mentioned further technical solution is that the power supply equipment provides a stable power supply for the entire system. When the mobile distribution box is moved to the construction site, the built-in power supply equipment enables the box door to be opened during installation, providing real-time power to the grounding resistance measuring equipment and the interlocking device.

[0014] Furthermore, the power supply device includes a lithium battery and an external power adapter, and the power supply device is equipped with a voltage regulator circuit and an overload protection circuit; both the lithium battery and the external power adapter are connected to the control device.

[0015] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The power supply equipment, including a lithium battery and an external power adapter, is adaptable to different operating environments. The power supply equipment includes a voltage regulator circuit and an overload protection circuit to ensure stable system operation. When the mobile distribution box is moved to the construction site, the built-in lithium battery allows the box door to be opened during installation, providing real-time power to the grounding resistance measuring equipment and the interlocking device. The external power adapter is used to charge the lithium battery and power the grounding resistance measuring equipment and the interlocking device.

[0016] Furthermore, the grounding resistance measuring device is a four-wire grounding resistance measuring device.

[0017] The beneficial effects of adopting the above-mentioned further technical solution are: by using the four-wire method for measurement, the influence of wire resistance and contact resistance is eliminated, ensuring measurement accuracy.

[0018] Furthermore, the locking device is an electromagnetic lock or a motor-driven lock. The motor-driven lock is equipped with a motor, and the output shaft of the motor is connected to a rotating rod for mechanical unlocking. The free end of the rotating rod is exposed on the outside of the box or the door. The locking device is connected to a first switch for unlocking by de-energizing the electromagnetic lock or a second switch for unlocking by switching the rotation direction of the motor in the motor-driven lock.

[0019] The beneficial effects of adopting the above-mentioned further technical solution are: the locking device can use an electromagnetic lock or a motor-driven lock, which has a simple structure and high reliability. The first and second switches are used to unlock the locking device as needed, preventing professionals from being unable to open the distribution box or perform installation and maintenance when the locking device is locked. The first switch is used to de-energize the electromagnetic lock, causing the locking device to unlock; the second switch is used to control the motor to reverse, causing the motor-driven lock to unlock automatically. The rotating rod is used to manually rotate the rod to drive the motor to rotate, achieving unlocking and locking, when the motor-driven lock is de-energized.

[0020] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] Figure 1 This is one of the structural schematic diagrams of the distribution box provided in the embodiment of this utility model.

[0022] Figure 2 This is the second structural schematic diagram of the distribution box provided in the embodiment of this utility model.

[0023] Figure 3 This is one of the schematic diagrams of the distribution box provided in the embodiment of this utility model.

[0024] Figure 4 The second schematic diagram of the distribution box provided in this embodiment of the utility model.

[0025] Figure 5 A schematic flowchart illustrating the distribution box control method provided in this embodiment of the utility model.

[0026] Explanation of reference numerals in the attached diagram: 1. Enclosure; 2. Grounding wire; 3. Grounding resistance measuring device; 4. Locking device; 5. Enclosure door; 6. Control equipment; 7. Power supply equipment; 8. Mechanical lock; 9. Motor; 10. Rotating rod; 11. First switch; 12. Second switch. Detailed Implementation

[0027] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0028] like Figures 1 to 4As shown in the figure, this utility model embodiment provides a distribution box, including: a box body 1, a grounding wire 2, a grounding resistance measuring device 3, and a locking device 4. The locking device 4 is installed on the box body 1. One end of the grounding wire 2 is connected to the box body 1, and the other end of the grounding wire 2 is grounded. The grounding resistance measuring device 3 is connected to the grounding wire 2, and the locking device 4 is connected to the grounding resistance measuring device 3.

[0029] The beneficial effects of adopting this utility model's technical solution are as follows: The locking device is used to lock or unlock the box door. When the grounding resistance does not meet the requirements, the box door is locked and cannot be opened. Controlling the box door through grounding measurement ensures that the distribution box must be properly grounded before use, thereby improving the safety of the mobile distribution box.

[0030] The distribution box may be, but is not limited to, a mobile distribution box.

[0031] This utility model relates to the field of power equipment technology, specifically to a mobile distribution box, particularly a mobile distribution box that uses grounding resistance to lock the box door, suitable for temporary power supply, construction sites and other occasions.

[0032] The control of the distribution box door is achieved through grounding measurements, ensuring that the distribution box is properly grounded before use. When the grounding resistance value meets the requirements, the door unlocks and opens, allowing the distribution box to be used. When the grounding resistance does not meet the requirements, the door automatically locks and cannot be opened. This addresses the root cause of ungrounded distribution boxes, improving electrical safety.

[0033] 1. Installation of grounding resistance measuring equipment: Connect the measuring electrodes to the grounding wire of the distribution box, ensuring good contact between the electrodes and the grounding wire.

[0034] The measuring device (grounding resistance measuring device) collects the grounding resistance value in real time and transmits the data to the control device.

[0035] 2. Control equipment workflow: The control equipment receives measurement data and determines whether the grounding resistance exceeds the set threshold (e.g., 10Ω).

[0036] If the threshold is exceeded, the control device sends a locking signal to the locking device; if the threshold is not exceeded, an unlocking signal is sent.

[0037] 3. Locking device operation: After receiving the signal from the control equipment, the locking device drives the electromagnetic lock or motor lock (motor-driven lock) to lock or unlock the box door.

[0038] When the grounding resistance exceeds the standard, the cabinet door will automatically lock and cannot be opened; when the grounding resistance is normal, the cabinet door will unlock and can be used normally.

[0039] 4. Power supply equipment working process: The power supply equipment provides a stable power supply for the grounding resistance measuring equipment, control equipment and interlocking device.

[0040] Lithium batteries or external power adapters can be used to ensure the system works normally in different environments.

[0041] like Figures 1 to 4 As shown, further, a door 5 is rotatably installed on one side of the box body 1, and the locking device 4 is installed on the box body 1, or the locking device 4 is installed on the box body 1 through the door 5; a mechanical lock 8 is installed on the door 5 or the box body 1.

[0042] The beneficial effects of adopting the above-mentioned further technical solution are: the interlocking device is installed on the enclosure or door, which facilitates the selection of the installation position of the interlocking device according to actual needs, and facilitates the installation and maintenance of the interlocking device. The mechanical lock is used to ensure that the interlocking device remains unlocked during the use of the distribution box, provided the grounding resistance meets the requirements. The mechanical lock locks the door, preventing unauthorized opening and achieving interlocking during operation.

[0043] like Figures 1 to 4 As shown, the locking device 4 is further connected to the grounding resistance measuring device 3 via the control device 6.

[0044] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The grounding resistance measuring device is used to measure the grounding resistance value of the distribution box in real time and transmit the measurement result to the control device. The control device is used to receive the data from the grounding resistance measuring device and determine whether the grounding resistance exceeds the set threshold. If it exceeds the threshold, a locking signal is sent to the locking device; if it does not exceed the threshold, an unlocking signal is sent.

[0045] The control device 6 can be installed in the housing 1.

[0046] like Figures 1 to 4 As shown, the control device 6 is further connected to a power supply device 7, which is installed in the housing 1.

[0047] The beneficial effect of adopting the above-mentioned further technical solution is that the power supply equipment provides a stable power supply for the entire system. When the mobile distribution box is moved to the construction site, the built-in power supply equipment enables the box door to be opened during installation, providing real-time power to the grounding resistance measuring equipment and the interlocking device.

[0048] The power supply equipment can be installed inside the enclosure.

[0049] Furthermore, the power supply device 7 includes a lithium battery and an external power adapter, and the power supply device is equipped with a voltage regulator circuit and an overload protection circuit; both the lithium battery and the external power adapter are connected to the control device 6.

[0050] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The power supply equipment, including a lithium battery and an external power adapter, is adaptable to different operating environments. The power supply equipment includes a voltage regulator circuit and an overload protection circuit to ensure stable system operation. When the mobile distribution box is moved to the construction site, the built-in lithium battery allows the box door to be opened during installation, providing real-time power to the grounding resistance measuring equipment and the interlocking device. The external power adapter is used to charge the lithium battery and power the grounding resistance measuring equipment and the interlocking device.

[0051] like Figures 1 to 4 As shown, the grounding resistance measuring device 3 is a four-wire grounding resistance measuring device.

[0052] The beneficial effects of adopting the above-mentioned further technical solution are: by using the four-wire method for measurement, the influence of wire resistance and contact resistance is eliminated, ensuring measurement accuracy.

[0053] The four-wire grounding resistance measuring device may include: a first measuring electrode, a second measuring electrode, a third measuring electrode, a fourth measuring electrode, a signal processing circuit, and a data transmission interface. The first measuring electrode, the second measuring electrode, the third measuring electrode, the fourth measuring electrode, and the data transmission interface are all connected to the signal processing circuit.

[0054] The first and second measuring electrodes are inserted into the ground, while the third and fourth measuring electrodes are connected to the grounding wire 2.

[0055] The distance between the first measuring electrode and the second measuring electrode, and the distance between the second measuring electrode and the grounding wire, can both be 5-10m. The second measuring electrode can be located between the first measuring electrode and the grounding wire.

[0056] The first measuring electrode can be a current electrode, and the second measuring electrode can be a voltage electrode.

[0057] As an alternative to the four-wire grounding resistance measuring device 3 mentioned above, the grounding resistance measuring device can also be a voltage and current meter grounding resistance measuring device, a ratio meter grounding resistance measuring device, or a bridge grounding resistance measuring device.

[0058] like Figures 1 to 4As shown, the locking device 4 is further described as an electromagnetic lock or a motor-driven lock. The motor-driven lock is equipped with a motor 9, and the output shaft of the motor 9 is connected to a rotating rod 10 for mechanical unlocking. The free end of the rotating rod 10 is exposed on the outside of the box body 1 or the box door 5. The locking device 4 is connected to a first switch 11 for unlocking by de-energizing the electromagnetic lock, or the locking device 4 is connected to a second switch 12 for unlocking by switching the rotation direction of the motor 9 in the motor-driven lock.

[0059] The beneficial effects of adopting the above-mentioned further technical solution are: the locking device can use an electromagnetic lock or a motor-driven lock, which has a simple structure and high reliability. The first and second switches are used to unlock the locking device as needed, preventing professionals from being unable to open the distribution box or perform installation and maintenance when the locking device is locked. The first switch is used to de-energize the electromagnetic lock, causing the locking device to unlock; the second switch is used to control the motor to reverse, causing the motor-driven lock to unlock automatically. The rotating rod is used to manually rotate the rod to drive the motor to rotate, achieving unlocking and locking, when the motor-driven lock is de-energized.

[0060] The motor-driven lock may include a motor, a gear, and a rack. The motor is mounted on the housing or door, the gear is mounted on the output shaft of the motor, and the rack is slidably mounted on the housing or door. The gear meshes with the rack, and the door or housing has a corresponding insertion hole adapted to the rack, in which the rack is slidably inserted.

[0061] The free end of the rotating rod can have a polygonal cross-section to facilitate rotation using a wrench or handle. The door or body of the enclosure may have a through hole for the free end of the rotating rod to pass through.

[0062] The present invention provides a power distribution box, which can be a mobile power distribution box, including a box body, a box door, a grounding resistance measuring device, a control device, a locking device, and a power supply device.

[0063] 1. Grounding resistance measuring equipment: used to measure the grounding resistance value of the distribution box in real time and transmit the measurement results to the control equipment.

[0064] The four-wire method is used to eliminate the influence of wire resistance and contact resistance, ensuring measurement accuracy.

[0065] The measuring device (grounding resistance measuring device) may include measuring electrodes, signal processing circuits, and data transmission interfaces.

[0066] 2. Control equipment: Receives data from the grounding resistance measuring device and determines whether the grounding resistance exceeds the set threshold (e.g., 10Ω).

[0067] If the threshold is exceeded, a locking signal is sent to the locking device; if the threshold is not exceeded, an unlocking signal is sent.

[0068] The control device can be implemented using a microcontroller (such as STM32 or Arduino), which has data processing and logic control functions.

[0069] 3. Locking device: Locks or unlocks the cabinet door according to the signal from the control equipment.

[0070] When the grounding resistance exceeds the standard, the door will automatically lock and cannot be opened.

[0071] The locking device can be an electromagnetic lock or a motor-driven lock, which has a simple structure and high reliability.

[0072] 4. Power supply equipment: Provides a stable power supply for the entire system.

[0073] It can be powered by a lithium battery or an external power adapter to adapt to different usage environments.

[0074] Power supply equipment may include voltage regulation circuits and overload protection circuits to ensure stable system operation.

[0075] By incorporating functions such as grounding resistance detection and automatic door locking, the safety shortcomings of using mobile distribution boxes in situations of poor grounding are addressed, offering the following advantages:

[0076] 1. Reliability: Real-time monitoring of grounding resistance value ensures that the distribution box is properly grounded before use.

[0077] 2. Intelligent: Automatic judgment and control are achieved through control equipment, reducing manual intervention.

[0078] 3. Low cost: Simple structure, easy to implement, suitable for large-scale promotion.

[0079] 4. Safety: The box door automatically locks in case of poor grounding to prevent misoperation and electric shock accidents.

[0080] 5. Adaptability: Suitable for various complex environments, such as construction sites and temporary power supply.

[0081] like Figure 5 As shown, in addition, this utility model also provides a distribution box control method. Based on any of the above-mentioned distribution boxes, the distribution box control method includes: measuring the grounding resistance value of the distribution box in real time; determining whether the grounding resistance value exceeds a set threshold; and locking the box door when the grounding resistance value exceeds the set threshold.

[0082] The beneficial effects of adopting this utility model's technical solution are as follows: The locking device is used to lock or unlock the box door. When the grounding resistance does not meet the requirements, the box door is locked and cannot be opened. Controlling the box door through grounding measurement ensures that the distribution box must be properly grounded before use, thereby improving the safety of the mobile distribution box.

[0083] Furthermore, after the step of determining whether the grounding resistance value exceeds the set threshold, the method includes: when the grounding resistance value does not exceed the set threshold, unlocking the door of the distribution box.

[0084] The beneficial effect of adopting the above-mentioned further technical solution is that when the grounding resistance value meets the requirements, the box door is locked and unlocked, the box door is opened, and the distribution box can be used.

[0085] Furthermore, the set threshold is 10Ω or 4Ω.

[0086] The beneficial effects of adopting the above-mentioned further technical solutions are: they are applicable to a variety of high and low voltage systems, thus expanding the scope of application.

[0087] Grounding resistance is the resistance encountered when current flows from a grounding device into the earth and then through the earth to another grounding body or diffuses to a distance. The grounding resistance value reflects the degree of good contact between electrical equipment and the "ground" and reflects the scale of the grounding grid.

[0088] In 380 / 220V low-voltage systems, the grounding current generally does not exceed a few amps, so the grounding resistance is specified to be no more than 4 ohms. When the capacity is below 100 kVA, the grounding resistance can be relaxed to no more than 10 ohms.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A distribution box, characterized in that, include: The enclosure includes a grounding wire, a grounding resistance measuring device, and a locking device. The locking device is installed on the enclosure. One end of the grounding wire is connected to the enclosure, and the other end of the grounding wire is grounded. The grounding resistance measuring device is connected to the grounding wire, and the locking device is connected to the grounding resistance measuring device.

2. A distribution box according to claim 1, characterized in that, A door is rotatably mounted on one side of the enclosure, and a locking device is installed on the enclosure, or the locking device is installed on the enclosure via the door; a mechanical lock is installed on the door or the enclosure.

3. A distribution box according to claim 1, characterized in that, The locking device is connected to the grounding resistance measuring device via a control device.

4. A distribution box according to claim 3, characterized in that, The control device is connected to a power supply device, which is installed inside the enclosure.

5. A distribution box according to claim 4, characterized in that, The power supply device includes a lithium battery and an external power adapter. The power supply device is equipped with a voltage regulator circuit and an overload protection circuit. Both the lithium battery and the external power adapter are connected to the control device.

6. A distribution box according to claim 1, characterized in that, The grounding resistance measuring device is a four-wire grounding resistance measuring device.

7. A distribution box according to claim 1, characterized in that, The locking device is an electromagnetic lock or a motor-driven lock. The motor-driven lock is equipped with a motor, and the output shaft of the motor is connected to a rotating rod for mechanical unlocking. The free end of the rotating rod is exposed on the outside of the box or the door. The locking device is connected to a first switch for unlocking the electromagnetic lock by de-energizing it, or the locking device is connected to a second switch for unlocking the motor by switching the rotation direction of the motor in the motor-driven lock.

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