A marine five-prevention interlock device with a U-shaped support and a grounding switch linkage

Abstract

The present application relates to a kind of U-shaped support and grounding switch linkage marine five-prevent interlock device, comprising: electrical interlock, be set in the main distribution board control screen bus grounding and circuit breaker test position;Cable room door interlock, for the cable room door interlock of main distribution board control screen;Circuit breaker room door and handcart position interlock, be set in handcart position interlock, respectively for 4kV cabinet and 10kV cabinet increase a interlock, ensure electrical equipment and personal safety;Grounding switch interlock mechanism, for the grounding switch device suitable for large torque of main distribution board control screen grounding operating mechanism, can realize the five-prevent mechanical interlock function of main distribution board control screen;Middle door interlock mechanism, for the interlock of circuit breaker room door, meet the requirement of main distribution board control screen to prevent misentry live interval, when circuit breaker is in working position, ensure that middle door is not opened, guarantee equipment and personnel safety;Back upper door interlock, for 4kV back door and grounding switch interlock.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of ship power system transmission and distribution system, especially a kind of five-proof interlocking device of ship power system main distribution board. BACKGROUND

[0002] The five-proof interlocking device of marine distribution board is a safety measure to prevent misoperation in the power system, thereby ensuring the safety of operating personnel and stable operation of the power system. To ensure the safe operation of the switch cabinet, in addition to strictly following the procedures, the reliability of the mechanical interlocking of the switch cabinet should be improved. At present, there are many types of switch cabinets on the market, most of which have a relatively complete interlocking mode. However, the interlocking of many high-voltage switch cabinets, especially the mechanical interlocking, is not perfect and cannot fully meet the "five-proof" requirements.

[0003] The development of five-proof interlocking device has gone through mechanical five-proof, electromagnetic five-proof, and microcomputer five-proof. The future development direction is distributed five-proof. The conventional misoperation prevention locking modes mainly include mechanical locking, program locking, electrical interlocking, and electromagnetic lock. The development and application of these technologies provide an important guarantee for the safe operation of the power system. With the advancement of technology, the five-proof interlocking device is constantly improving and perfecting.

[0004] The development of the current integrated power system not only requires the switchgear in the power system to have measurement, monitoring, control, protection, and other functions, but also further requires the operation of the switchgear to have remote, intelligent, secure, and automatic characteristics. The DC circuit breaker plays an important role in the integrated power system main distribution board. Generally, the DC circuit breaker setting needs to have "five-proof" interlocking function. SUMMARY

[0005] The present application is based on the original DC circuit breaker "five-proof" interlocking device. To adapt to the current trend of complexity and refinement of integrated power systems, a U-shaped support and grounding switch interlocking marine five-proof interlocking device is proposed to meet the new requirements of the DC main distribution board system.

[0006] To achieve the above-mentioned purpose, the technical solution of the present application is: a U-shaped support and grounding switch interlocking marine five-proof interlocking device, including electrical interlocking, cable room door interlocking, circuit breaker room door and trolley position interlocking, grounding switch interlocking mechanism, middle door interlocking mechanism, and rear upper door interlocking,

[0007] The electrical interlocking is set at the middle voltage main distribution board control screen bus grounding and circuit breaker test position;

[0008] The cable room door interlocking is the cable room door interlocking of the middle voltage main distribution board control screen, which is realized by the grounding switch operating mechanism;

[0009] The circuit breaker room door is interlocked with the handcart position, and is arranged at the handcart position interlocking position. On the basis of the original handcart position interlocking, one interlocking is added for the 4kV cabinet and the 10kV cabinet respectively, so as to ensure the safety of electrical equipment and personnel.

[0010] The grounding switch interlocking mechanism is matched with the grounding operation mechanism of the medium voltage main distribution board control panel and is suitable for grounding switch devices with large torque, so as to realize the five-prevention mechanical interlocking function of the medium voltage main distribution board control panel.

[0011] The middle door interlocking mechanism is used for the interlocking of the circuit breaker room door, so as to meet the requirement of the medium voltage main distribution board control panel to prevent misentry into the live interval. When the circuit breaker is in the working position, the middle door is ensured not to be opened, so as to ensure the safety of the equipment and personnel.

[0012] The rear upper door interlocking is used for the interlocking of the 4kV rear door and the grounding switch interlocking, which is maintained through the waist-shaped support on the lower left. The rear door interlocking of the 10kV cabinet is directly made on the grounding switch, which directly uses the u-shaped support in the rear door. When the grounding switch is opened, the rear door cannot be opened. Conversely, the rear door can be opened.

[0013] Further, the cable room door interlocking mechanism realizes the safety protection requirement of the lower door under normal circumstances. When the circuit breaker is closed, the cable room is live, the grounding switch cannot be closed, the lower door cannot be opened, and personnel misentry into the live cable room is prevented. Only when the circuit breaker is opened, the grounding switch is closed, and the cable room is not live, the lower door can be opened to enter the cable room.

[0014] Further, when the grounding switch is opened, the cam on the grounding switch operating rod locks the pin shaft in the lower door interlocking mechanism and fixes the tongue plate on the lower door, so that the lower door cannot be opened. When the grounding switch is closed, the cam on the grounding switch operating rod lowers the pin shaft, so that the neck part on the pin shaft is located at the tongue plate position. The tongue plate can be separated from the pin shaft, and the lower door can be opened.

[0015] Further, the circuit breaker room door is interlocked with the handcart position, including that the 4kV cabinet enhances the handcart position interlocking through the emergency opening lever, and the 10kV cabinet enhances the handcart position interlocking by opening the lock hole below the middle operation hole with a key. The operation hole on the left side of the 10kV cabinet is used for emergency opening.

[0016] Further, the grounding switch interlocking mechanism adopts a grounding interlocking device to realize the transmission rotation, deceleration rotation, and the five-prevention mechanical interlocking function of the medium voltage main distribution board control panel.

[0017] Further, the grounding interlocking device uses a lead screw transmission, and the speed reducer device realizes the respective work of the front shaft and the rear shaft. The front shaft is moved by rotation, the grounding device rotates three circles, the sliding block drives the pressing plate to realize the front shaft interlocking, and the tail part is rotated and decelerated through the planetary gear reducer.

[0018] Further, the middle door interlocking mechanism adopts a four-link slider mechanism, cooperates with the distribution board inner valve mechanism, the cabinet frame and the middle door to realize the breaker rocking in, the valve pressing down, the linkage of the middle door interlocking mechanism, the middle door unable to open, the avoidance of the mistake into the live interval; the breaker is in the test position, the valve mechanism rebounds, the middle door interlocking mechanism is unlocked, and the middle door can be opened.

[0019] The beneficial effects of the present application are:

[0020] 1. The present application realizes the five-prevention functions through the design of the electrical interlocking, the cable chamber door interlocking, the breaker chamber door and handcart position interlocking, the grounding switch interlocking mechanism, the middle door interlocking mechanism and the rear upper door interlocking.

[0021] 2. The electrical interlocking ensures the completion of the mistake opening and closing of the breaker or contactor, and the opening and closing operation can be performed only when the breaker or contactor is in the working, test or moving position.

[0022] 3. The cable chamber door interlocking can realize the safety protection requirement of the lower door, ensures the function of preventing the mistake into the live interval, and when the breaker or contactor is not in the working position, the valve mechanism acts to prevent the approach to the busbar. When the grounding switch is in the non-closed position, the rear door plate cannot be opened. When the breaker or contactor is in the test position, the breaker or contactor chamber door can be opened.

[0023] 4. The breaker chamber door and handcart position interlocking ensure the completion of the functions of preventing the live closing of the grounding switch and preventing the load pushing and pulling of the handcart, and when the circuit breaker or contactor is in the working state, the grounding switch operating handle is not allowed to be inserted into the operating hole.

[0024] 5. The design of the grounding switch interlocking mechanism ensures the completion of the function of preventing the grounding switch from closing the breaker or contactor in the grounding position, and when the grounding switch is in the closed position, the breaker or contactor cannot enter the working position.

[0025] 6. The design of the middle door interlocking mechanism and the rear upper door interlocking ensures the function of preventing the mistake into the live interval, and when the breaker or contactor is not in the working position, the valve mechanism acts to prevent the approach to the busbar. When the grounding switch is in the non-closed position, the rear door plate cannot be opened. When the breaker or contactor is in the test position, the breaker or contactor chamber door can be opened. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of a 4kV cabinet emergency tripping lever;

[0027] Figure 2 is a schematic diagram of a 10kV cabinet interlocking operating hole;

[0028] Figure 3 is a schematic diagram of a grounding switch interlocking mechanism;

[0029] Figure 4 is the middle door interlock schematic diagram;

[0030] Figure 5 is the 4kV rear door and grounding switch interlock schematic diagram;

[0031] Figure 6 is the 10kV rear door and grounding switch interlock schematic diagram. DETAILED DESCRIPTION

[0032] The application will be further described below in conjunction with the drawings and embodiments.

[0033] As shown in Figures 1 to 6 The application provides a U-shaped support and grounding switch interlocking marine five-prevention interlocking device, which comprises electrical interlocking, cable chamber door interlocking, circuit breaker chamber door and trolley position interlocking, grounding switch interlocking mechanism, middle door interlocking mechanism and rear upper door interlocking.

[0034] The application improves the circuit breaker chamber door and trolley position interlocking and rear door interlocking on the basis of the original five-prevention interlocking device.

[0035] (1) For the circuit breaker chamber door and trolley position interlocking, the 4kV cabinet is enhanced by the emergency tripping lever; the 10kV cabinet is enhanced by the key to open the lock hole below the middle operating hole, and the operating hole on the left side is used for emergency tripping.

[0036] (2) For the rear door interlocking, the 4kV rear door and grounding switch interlocking are maintained by the left lower waist-shaped support; the 10kV rear door interlocking is directly made on the grounding switch, directly using the u-shaped support in the rear door, and when the grounding switch is tripped, the rear door cannot be opened, and vice versa.

[0037] For the above interlocking structure and function, the specific content is as follows

[0038] (1) Electrical interlocking

[0039] When the generator screen cable is grounded or the circuit breaker is in the test position and the generator is in the live state, the electrical interlocking is realized; the medium voltage main distribution board control screen bus grounding and circuit breaker test position have electrical interlocking.

[0040] (2) Cable chamber door interlocking

[0041] The cable chamber door interlocking of the medium voltage main distribution board control screen is realized by the grounding switch operating mechanism, which is as follows:

[0042] When the grounding switch is tripped, the cam on the grounding switch operating lever locks the pin shaft in the lower door interlocking mechanism, and the tongue plate fixed to the lower door cannot be opened.

[0043] When the grounding switch is closed, the cam on the grounding switch operating rod will press down the pin shaft, and the neck on the pin shaft will be in the tongue position, so that the tongue can be separated from the pin shaft, and the lower door can be opened.

[0044] Normally, this interlock can achieve the safety protection requirements of the lower door: when the circuit breaker is closed, the cable chamber is live, the grounding switch cannot be closed, and the lower door cannot be opened, preventing personnel from entering the live cable chamber; only when the circuit breaker is open, the grounding switch is closed, and the cable chamber is not live, can the lower door be opened to enter the cable chamber.

[0045] (3) Interlock between circuit breaker chamber door and handcart position

[0046] The 4kV cabinet enhances the handcart position interlock through the emergency tripping lever, and the 10kV cabinet enhances the handcart position interlock by opening the lock hole below the middle operating hole with a key. The operating hole on the left side is used for emergency tripping.

[0047] The protection level of the medium voltage main distribution board control panel is high. When the circuit breaker is in the working position and needs to be manually energized, closed, and opened, the circuit breaker chamber door is opened, the protection level between the person and the live body is reduced, and there is a safety hazard. If there is a phase-to-phase or single-phase ground fault in the high-voltage circuit at this time, the circuit breaker operation may cause personal safety accidents.

[0048] The solution to the above problems is that the opening and closing of the circuit breaker chamber door can control the circuit breaker handcart position. The interlock scheme of the circuit breaker itself is adopted to realize the interlock with the cabinet door. When the circuit breaker chamber door is opened, the handle of the handcart cannot be inserted to shake the handcart into the working position, and only the circuit breaker chamber door can be opened to enter the working state. By controlling the position of the handcart and the interlock with the circuit breaker chamber door, the accident hazard caused by such problems is solved. When the middle door is opened, the handle of the handcart cannot be inserted to shake the handcart.

[0049] The present application adds an interlock to the original handcart position interlock for 4kV and 10kV cabinet bodies respectively to ensure the safety of electrical equipment and personnel.

[0050] The 4kV cabinet can expose the handle operating hole to push in and exit the handcart by twisting the emergency tripping lever 1 to the left, as shown in Figure 1 .

[0051] The 10kV cabinet can open the handle operating hole to push in and exit the handcart by opening the lock hole 2 below the middle operating hole with a key, and the operating hole 3 on the left side is used for right rotation to perform emergency tripping, as shown in Figure 2 .

[0052] (4) Grounding switch interlock mechanism

[0053] The grounding operation mechanism matched with the medium voltage main distribution board control panel is suitable for grounding switch device with large torque. The mechanism needs a complete set of mechanism to undertake this function: transmission rotation, speed reduction rotation, and can realize the five-prevention mechanical interlocking function of the medium voltage main distribution board control panel. In combination with the existing grounding device products, in order to meet the interlocking requirements, a non-standard grounding interlocking device is designed.

[0054] By using the mechanical characteristics of the screw rod, the front shaft is changed from rotation to movement, the grounding device rotates three turns, the slider drives the pressing plate to realize the front shaft interlocking, and the rear shaft can only rotate half a turn through the planetary gear reducer. Figure 3 (a), (b), (c), (d).

[0055] The non-standard mechanical device includes screw rod 4, reducer 5, slider 6, interlocking pressing plate 7, lock sleeve 8, etc., which realizes the work of front shaft and rear shaft by using screw rod transmission and reducer device. The screw rod 4 and reducer 5 in the device can be variously selected and evolved, and the evolved non-standard grounding interlocking device can be applied to various medium and high voltage distribution board equipment.

[0056] (5) Middle door interlocking mechanism

[0057] The medium voltage main distribution board control panel requires to prevent misentry into the live interval. Only when the circuit breaker is in the test position, the circuit breaker room door can be opened. When the circuit breaker is in the working position, the middle door cannot be opened.

[0058] The newly developed circuit breaker and contactor do not have a direct matching middle door interlocking kit. In order to meet the product interlocking requirements, a non-standard interlocking device is designed.

[0059] The interlocking device uses a four-bar slider mechanism, cooperates with the distribution board inner valve mechanism 10, cabinet frame, middle door 9, realizes the circuit breaker swing-in, valve pressing down, linkage middle door interlocking mechanism, middle door 9 cannot be opened, avoids misentry into the live interval. When the circuit breaker is in the test position, the valve mechanism rebounds, the middle door interlocking mechanism retracts and unlocks, and the middle door 9 can be opened, see Figure 4 (a), (b), (c). When the circuit breaker is in the working position, it is ensured that the middle door 9 is not opened, and the safety of the equipment and personnel is ensured.

[0060] (6) Rear upper door interlocking

[0061] According to the structural characteristics of the cabinet, the cable chamber pressure relief channel is communicated with the rear upper door. When the cable chamber is live, if the rear upper door is opened, misentry into the live interval at this time is contrary to the design of five-prevention, the solution to this problem is that the opening of the rear upper door is after the opening of the cable door, the design principle is shown in the figure, only when the cable chamber door is opened, the rear upper door is allowed to be opened, which eliminates the safety hazard. Meet the requirement of five-prevention "prevent misentry into the live interval".

[0062] On the basis of the above-mentioned back door interlock, the improvement is to add an interlock on the basis of the original back door interlock for 4kV cabinet and 10kV cabinet respectively, to ensure the safety of electrical equipment and personal safety.

[0063] 4kV back door and grounding switch interlock is maintained by the waist type support 12 on the left lower side, when the grounding switch is opened, the back door is hooked, and when the grounding switch is closed, the back door can be opened, see Figure 5 .

[0064] The 10kV back door interlock is directly made on the grounding switch, and there is a hook on the shaft, which directly hooks the u-shaped support 13 inside the back door. When the grounding switch is opened, the back door is hooked and cannot be opened. When the grounding switch is closed, the back door can be opened. See Figure 6 .

Claims

1. A marine five-protection interlocking device in which a U-shaped support is linked to a grounding switch, characterized in that: The electrical interlocking, cable chamber door interlocking, circuit breaker chamber door and handcart position interlocking, grounding switch interlocking mechanism, middle door interlocking mechanism and rear upper door interlocking are included, wherein: The electrical interlocking is arranged at the bus grounding of the medium voltage main distribution board control panel and the test position of the circuit breaker. The cable chamber door interlocking is arranged at the cable chamber door of the medium voltage main distribution board control panel and is realized by the grounding switch operating mechanism. Under normal circumstances, the cable chamber door interlocking realizes the safety protection requirement of the lower door. When the circuit breaker is closed, the cable chamber is electrified, the grounding switch cannot be closed, the lower door cannot be opened, and the personnel is prevented from entering the electrified cable chamber. Only when the circuit breaker is opened, the grounding switch is closed, and the cable chamber is not electrified, the lower door can be opened to enter the cable chamber. The circuit breaker chamber door and handcart position interlocking is arranged at the handcart position interlocking. On the basis of the original handcart position interlocking, one interlocking is added for the 4kV cabinet and the 10kV cabinet respectively, so as to ensure the safety of the electrical equipment and the personnel. The 4kV cabinet enhances the handcart position interlocking through the emergency opening lever. The 10kV cabinet enhances the handcart position interlocking by opening the lock hole below the middle operating hole with a key. The left operating hole is used for emergency opening. The grounding switch interlocking mechanism is matched with the grounding switch device suitable for large torque for the grounding operating mechanism of the medium voltage main distribution board control panel, and can realize the five-protection mechanical interlocking function of the medium voltage main distribution board control panel. The grounding switch interlocking mechanism adopts the grounding interlocking device to realize the transmission rotation, deceleration rotation, and the five-protection mechanical interlocking function of the medium voltage main distribution board control panel. The middle door interlocking mechanism is used for the interlocking of the circuit breaker chamber door, meets the requirement of the medium voltage main distribution board control panel to prevent entering the electrified interval, ensures that the middle door is not opened when the circuit breaker is in the working position, and guarantees the safety of the equipment and the personnel. The middle door interlocking mechanism adopts the four-bar slider mechanism, cooperates with the distribution board inner valve mechanism, the cabinet frame, the middle door, realizes the circuit breaker rocking in, the valve pressing down, the linkage middle door interlocking mechanism, the middle door cannot be opened, and avoids entering the electrified interval. When the circuit breaker is in the test position, the valve mechanism rebounds, the middle door interlocking mechanism is unlocked, and the middle door can be opened. The rear upper door interlocking is used for the interlocking of the 4kV rear door and the grounding switch interlocking, and is maintained by the left lower waist type support. The rear door interlocking of the 10kV is directly made on the grounding switch, directly uses the u-shaped support in the rear door, hooks the rear door when the grounding switch is opened, and cannot open the rear door. Conversely, it can be opened.

2. The U-shaped bracket and grounding switch linkage marine five-prevention interlock device according to claim 1, characterized in that: When the grounding switch is opened, the cam on the grounding switch operating lever locks the pin shaft in the lower door interlocking mechanism, and fixes the tongue plate on the lower door, so that the lower door cannot be opened. When the grounding switch is closed, the cam on the grounding switch operating lever lowers the pin shaft, and the neck part on the pin shaft is located at the tongue plate position. The tongue plate can be separated from the pin shaft, and the lower door can be opened.

3. The U-shaped bracket and grounding switch linkage marine five-prevention interlock device according to claim 1, characterized in that: The grounding interlocking device utilizes the screw rod transmission, the reducer device realizes the work of the front shaft and the rear shaft respectively, the front shaft is moved by rotation, the grounding device rotates three circles, the slider drives the pressing plate to realize the front shaft interlocking, and the tail part is rotated and decelerated by the planet wheel reducer. The rear shaft can only rotate half a circle.

Images