Emergency power supply equipment for shield tunneling machine

Abstract

Compared with the prior art, the emergency power supply equipment for the shield tunneling machine comprises a safety circuit breaker, a power supply device and a power supply device, the EMS energy management module is connected with the safety circuit breaker; a PCS bidirectional inverter connected with the EMS energy management module and used for bidirectional AC / DC and DC / DC conversion; the energy storage battery module is connected with the EMS energy management module; the energy safety device is connected with the energy storage battery module; the safety circuit breaker is used for being connected to a low-voltage busbar of a shield main transformer so as to discharge the low-voltage busbar to drive application equipment in an emergency state. Compared with the prior art, the emergency power supply equipment for the shield tunneling machine is applied to the shield tunneling machine, so that the threat to the personal safety of tunnel personnel due to the use of a diesel generator can be effectively reduced, and the safety of a tunnel emergency construction environment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machines, and in particular to an emergency power supply device for shield machines. Background Art

[0002] The shield machine is a special engineering machine for tunnel excavation. Its power supply is usually from the municipal 10kV ground power supply, which is converted into 0.4kV or 0.69kV by a transformer and connected to the terminal loads at all levels through various levels of control and protection devices. Due to the particularity of the tunnel environment, the power outage of the shield machine will lead to the tunnel without lighting and ventilation, which will not be able to ensure the safe evacuation of personnel and the maintenance personnel will not be able to carry out maintenance in time, which may eventually cause huge economic losses due to personnel safety accidents or long-term project shutdowns. Therefore, in the design process of the shield machine, according to the importance of the shield machine's power load, emergency power supplies will be configured for relatively important load types, such as ventilation, drainage, lighting, air compressors, vacuum suction cups and other equipment.

[0003] In the prior art, the emergency power supply designed and configured for the shield machine is mainly based on the emergency diesel generator set, which is a power generation equipment composed of a diesel engine that drives an AC generator. It is suitable for places where the power interruption time is allowed to be more than 15 minutes. Usually, the working time of the emergency power supply should be considered according to the allowed power outage time, which should not be less than 10 minutes. As an emergency power supply equipment, the diesel generator has certain economic applicability and flexibility. However, due to the characteristics of relatively narrow space, high density of construction personnel, and very poor natural ventilation conditions in tunnel construction, the exhaust gas and noise emitted by the diesel generator set during operation will cause great harm to the workers and the surrounding environment, greatly affecting the actual use effect of the diesel generator on the shield, and also posing a threat to the personal safety of on-site personnel. In addition, the diesel emergency generator takes a long time from preparation to formal startup and stable power supply, which is difficult to meet the needs of emergency power generation for the shield.

[0004] Therefore, how to provide an emergency power supply device for a shield machine, which can effectively reduce the threat to the personal safety of tunnel personnel caused by the use of diesel generators and ensure the safety of the tunnel emergency construction environment when used on the shield machine, has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an emergency power supply device for a shield machine. Its application on the shield machine can effectively reduce the threat to the personal safety of tunnel personnel caused by the use of diesel generators and ensure the safety of the tunnel emergency construction environment.

[0006] The technical solution provided by the utility model is as follows:

[0007] The utility model provides an emergency power supply device for a shield machine, comprising: a safety circuit breaker;

[0008] An EMS energy management module connected to the safety circuit breaker;

[0009] A PCS bidirectional inverter connected to the EMS energy management module for bidirectional AC / DC and DC / DC conversion;

[0010] An energy storage battery module connected to the EMS energy management module;

[0011] An energy safety device connected to the energy storage battery module;

[0012] The safety circuit breaker is used to be connected to the low-voltage busbar of the shield main transformer so as to discharge the low-voltage busbar to drive application equipment in an emergency state.

[0013] Furthermore, in a preferred embodiment of the present invention, it also includes: a BMS battery management system connected to the energy storage battery module.

[0014] Furthermore, in a preferred embodiment of the present invention, the BMS battery cell management system includes: a battery cell power status management module; a charge and discharge voltage management module; and a current and temperature management module.

[0015] Furthermore, in a preferred embodiment of the present invention, the energy storage battery module comprises: a solid-state lithium iron phosphate cylindrical battery pack that is physically isolated from a chain of thermal runaway single cells.

[0016] Furthermore, in a preferred embodiment of the present invention, the EMS energy management module includes: a battery pack management module; and a collection module, wherein CAN communication is adopted between the collection module and the battery pack management module.

[0017] Furthermore, in a preferred embodiment of the present invention, a communication management module is also included, and the communication management module is communicatively connected with the BMS battery management system and the EMS energy management module.

[0018] Furthermore, in a preferred embodiment of the utility model, the energy safety device includes: an aerosol fire extinguishing protection layer in the PACK box, a cluster-level active safety isolation functional layer, and a single-cabinet heptafluoropropane fire extinguishing device.

[0019] Furthermore, in a preferred embodiment of the present invention, the application equipment includes: a cutter head and a pump station connected to a low-voltage busbar.

[0020] The utility model provides an emergency power supply device for a shield machine, which, compared with the prior art, includes: a safety circuit breaker; an EMS energy management module connected to the safety circuit breaker; a PCS bidirectional inverter connected to the EMS energy management module for bidirectional AC / DC and DC / DC conversion; an energy storage battery module connected to the EMS energy management module; an energy safety device connected to the energy storage battery module; the safety circuit breaker is used to connect to the low-voltage busbar of the shield main transformer to discharge the low-voltage busbar to drive the application device in an emergency state. Compared with the prior art, the emergency power supply device for a shield machine involved in the utility model can effectively reduce the threat to the personal safety of tunnel personnel caused by the use of diesel generators when applied to a shield machine, and ensure the safety of the tunnel emergency construction environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the principle of the emergency power supply equipment for a shield machine provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions in the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0024] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "first", "second", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0027] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present utility model can be implemented, so they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present utility model without affecting the effects and purposes that can be achieved by the present utility model.

[0028] like Figure 1 As shown, the emergency power supply equipment for a shield machine provided by an embodiment of the utility model includes: a safety circuit breaker 2; an EMS energy management module 4 connected to the safety circuit breaker 2; a PCS bidirectional inverter 3 connected to the EMS energy management module 4 and used for bidirectional AC / DC and DC / DC conversion; an energy storage battery module 6 connected to the EMS energy management module 4; an energy safety device 7 connected to the energy storage battery module 6; the safety circuit breaker 2 is used to be connected to the low-voltage busbar of the shield main transformer 8 to discharge the low-voltage busbar to drive the application equipment in an emergency state.

[0029] The utility model provides an emergency power supply device for a shield machine. Compared with the prior art, the emergency power supply device 1 specifically includes: a safety circuit breaker 2; an EMS energy management module 4 connected to the safety circuit breaker 2; a PCS bidirectional inverter 3 connected to the EMS energy management module 4 and used for bidirectional AC / DC and DC / DC conversion; an energy storage battery module 6 connected to the EMS energy management module 4; an energy safety device 7 connected to the energy storage battery module 6; the safety circuit breaker 2 is used to be connected to a low-voltage busbar of a shield main transformer 8, so as to discharge the low-voltage busbar to drive an application device in an emergency state. Compared with the prior art, the emergency power supply device 1 is directly connected to the low-voltage busbar of the shield transformer through the safety circuit breaker 2, and can be directly charged through the transformer power supply under normal circumstances; in an emergency, the low-voltage busbar can be directly discharged to drive systems such as a cutter head and a pump station. Its application to a shield machine can effectively reduce the threat to the personal safety of tunnel personnel caused by the use of diesel generators, and ensure the safety of the tunnel emergency construction environment.

[0030] The technical solution of the utility model is described in detail below in conjunction with specific embodiments:

[0031] Specifically, in a specific embodiment of the present utility model, it also includes: a BMS battery management system 5 connected to the energy storage battery module 6.

[0032] Specifically, in a specific embodiment of the present utility model, the BMS battery management system 5 includes: a battery power status management module; a charge and discharge voltage management module; and a current and temperature management module.

[0033] Among them, the safety circuit breaker 2 is controlled by the EMS energy management module 4, and the circuit is disconnected to protect the equipment when the busbar voltage exceeds the limit or the energy itself is out of control. The bidirectional inverter 3 can realize bidirectional AC / DC and DC / DC conversion, and effectively ensure that the system platform voltage meets the actual needs through high and low voltage conversion. In the embodiment of the utility model, the online charging and discharging function of the emergency power supply system is realized, and the BMS battery management system 5 can manage the power status, charging and discharging voltage, current and temperature of each group of battery cells to prevent overcharging and over-discharging of the battery and extend the battery life.

[0034] Specifically, in a specific embodiment of the utility model, the energy storage battery module 6 includes: a solid-state lithium iron phosphate cylindrical battery pack that is physically isolated by a single battery chain thermal runaway. The battery cell uses a safer solid-state lithium iron phosphate cylindrical battery, and the battery cell arrangement uses a single battery chain thermal runaway physical isolation technology, which improves the overall safety of the battery cell compared to the prior art.

[0035] Specifically, in a specific embodiment of the present utility model, the EMS energy management module 4 includes: a battery pack management module; a collection module, and the collection module and the battery pack management module use CAN communication.

[0036] Specifically, in a specific embodiment of the present utility model, a communication management module is also included, and the communication management unit is communicatively connected with the BMS battery management system 5 and the EMS energy management module 4 .

[0037] Specifically, in the specific embodiment of the utility model, the energy safety device 7 includes: an aerosol fire extinguishing protection layer in the PACK box, a cluster-level active safety isolation function layer, and a single-cabinet heptafluoropropane fire extinguishing device. In this embodiment, the energy safety device 7 adopts a triple function protection of aerosol fire extinguishing protection in the PACK box + cluster-level active safety isolation function + single-cabinet heptafluoropropane fire extinguishing device, so that compared with the prior art, the product safety is more guaranteed.

[0038] Specifically, in a specific embodiment of the present utility model, the application equipment includes: a cutter head and a pump station connected to a low-voltage busbar.

[0039] To be more specific, as a large-scale electromechanical equipment used for underground tunnel construction, the existing technology mainly adopts the ground 10kV municipal high-voltage power supply when designing the shield machine power supply system due to the particularity of its underground working environment. The equipment is equipped with a 10kV / 0.4kV transformer design, and the 10kV power supply from the ground substation is introduced into the equipment through a high-voltage cable as the power source of the whole machine. During the shield construction process, and the tunnel excavated is getting deeper and deeper, the energy configuration and other material supply of the entire shield machine will become more and more difficult. In some large-scale water diversion projects, the tunnel length is often more than 10 kilometers, and it takes more than two hours for personnel and materials to enter and exit. In this case, the shield machine gradually presents an "island" effect, that is, all energy supply in the tunnel depends entirely on the high-voltage transformer configured by itself. Once the transformer fails or the ground power fails, the entire shield machine immediately enters a "disabled" state, which not only affects the safe use of the equipment itself, but also poses a great threat to the personal safety of relevant personnel in the tunnel.

[0040] In order to solve this problem, shield machines are generally designed to be equipped with diesel generators as emergency power sources. However, the storage of diesel in the sealed space of the tunnel and the noise, heat, and toxic and harmful gases caused by the use of diesel generators will affect the health of construction workers in the tunnel.

[0041] The shield machine is a special engineering machine for tunnel excavation. Its power supply is usually from the municipal 10kV ground power supply, which is converted into 0.4kV or 0.69kV by a transformer and connected to the terminal loads at all levels through various levels of control and protection devices. Due to the particularity of the tunnel environment, the power outage of the shield machine will lead to the tunnel without lighting and ventilation, which will not be able to ensure the safe evacuation of personnel and the maintenance personnel will not be able to repair it in time. In the end, it may cause huge economic losses due to personnel safety accidents or long-term shutdown of the project. Therefore, in the design process of the shield machine, according to the importance of the shield machine power load, emergency power supplies will be configured for relatively important load types, such as ventilation, drainage, lighting, air compressors, vacuum suction cups and other equipment.

[0042] In the existing designs, the emergency power supply of the shield machine is mainly based on the emergency diesel generator set, which is a power generation equipment composed of a diesel engine driving an AC generator. It is suitable for places where the power interruption time is allowed to be more than 15 minutes. Usually, the working time of the emergency power supply should be considered according to the allowed power outage time, which should not be less than 10 minutes.

[0043] As an emergency power supply equipment, diesel generators have certain economic applicability and flexibility. However, because tunnel construction has the characteristics of relatively narrow space, high density of construction personnel, and very poor natural ventilation conditions, the exhaust gas and noise emitted by diesel generator sets during operation will cause great harm to workers and the surrounding environment, greatly affecting the actual use effect of diesel generators on shield machines. When used in a closed environment of a tunnel, diesel generators will not only emit a large amount of exhaust gas and make noise, threatening the safety of on-site construction personnel, but also consume a large amount of residual oxygen in the tunnel during the diesel combustion process, further exacerbating the threat to the personal safety of on-site personnel. In addition, it takes a long time for the diesel emergency generator to be prepared, officially started, and provide stable power supply, which does not meet the relevant requirements of shield emergency power generation. The technical solution involved in the embodiment of the utility model can be used on a shield machine. The use of this device can effectively reduce the threat of diesel generators to the personal safety of tunnel personnel and ensure the safety of the tunnel emergency construction environment. In addition, the device can also effectively meet the requirements of the time consumption of the start-up of the tunnel emergency power supply, and finally realize the "zero delay" online switching related functions.

[0044] according to Figure 1As shown, in the scheme involved in the embodiment of the utility model, the emergency power supply device 1 includes: a safety circuit breaker 2, a PCS bidirectional inverter 3, an EMS energy management module 4, a BMS battery management system 5, an energy storage battery module 6, and an energy safety device 7. The emergency power supply device 1 is directly connected to the low-voltage busbar of the shield transformer through the safety circuit breaker 2. Under normal circumstances, it can be directly charged through the transformer power supply; in an emergency, the low-voltage busbar can be directly discharged to drive the cutter head, pump station and other systems. The safety circuit breaker 2 is controlled by the EMS energy management module 4. When the busbar voltage exceeds the limit or the energy itself is out of control, the circuit is disconnected to protect the equipment. The bidirectional inverter 3 can realize bidirectional AC / DC and DC / DC conversion, effectively ensure that the system platform voltage meets the actual needs through high and low voltage conversion, and realize the online charging and discharging function of the emergency power supply system. The BMS battery management system 5 can manage the power status, charging and discharging voltage, current and temperature of each group of batteries, prevent the battery from overcharging and over-discharging, extend the service life of the battery, and ensure the safety of the battery. The energy storage battery module 6, i.e. the battery cell part, uses a safer solid-state lithium iron phosphate cylindrical battery. The battery cell layout adopts a single battery chain thermal runaway physical isolation technology to improve the overall safety of the battery cell. The energy safety device 7 adopts a triple function protection of aerosol fire extinguishing protection in the PACK box + cluster-level active safety isolation function + single-cabinet heptafluoropropane fire extinguishing device, which is more guaranteed in terms of product safety.

[0045] In summary, the technical solution provided by the utility model can effectively avoid the impact of exhaust gas and noise emitted during the operation of diesel generators on the personal safety of construction workers after replacing diesel generators, and can realize online charging and discharging and automatic switching functions through PCS and EMS, and can completely realize zero delay in power switching. At the same time, the emergency power supply equipment involved in the utility model is provided with a safety circuit breaker, which can effectively determine the external power environment and the operating status of the equipment through EMS, and immediately remove the energy device from the system after finding any abnormality, thereby protecting the equipment. In addition, solid-state lithium iron phosphate cylindrical battery cells are used in this solution, and the single-cell battery chain thermal runaway physical isolation technology is adopted, which can effectively improve the safety performance of the battery cells, and a triple-function protection integrated system of aerosol fire extinguishing protection in the PACK box + cluster-level active safety isolation function + single-cabinet heptafluoropropane fire extinguishing device is adopted, which is more guaranteed in product safety and has significant technical effects compared with the prior art.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An emergency power supply device for a shield machine, characterized in that: include: Safety circuit breaker (2); An EMS energy management module (4) connected to the safety circuit breaker (2); A PCS bidirectional inverter (3) connected to the EMS energy management module (4); An energy storage battery module (6) connected to the EMS energy management module (4); An energy safety device (7) connected to the energy storage battery module (6); The safety circuit breaker (2) is used to be connected to the low-voltage busbar of the shield main transformer (8) so as to discharge the low-voltage busbar to drive application equipment in an emergency state.

2. The emergency power supply device for a shield machine according to claim 1, characterized in that: Also includes: A BMS battery management system (5) connected to the energy storage battery module (6).

3. The emergency power supply device for a shield machine according to claim 2, characterized in that: The BMS battery management system (5) comprises: Battery cell power status management module, charge and discharge voltage management module, and current and temperature management module.

4. The emergency power supply device for a shield machine according to claim 1, characterized in that: The energy storage battery module (6) comprises: Solid-state lithium iron phosphate cylindrical battery pack treated by physical isolation of chain thermal runaway of single cells.

5. The emergency power supply device for a shield machine according to claim 1, characterized in that: The EMS energy management module (4) includes: A battery pack management module; a collection module, wherein the collection module and the battery pack management module communicate with each other using CAN.

6. The emergency power supply device for a shield machine according to claim 5, characterized in that: Also includes: A communication management module, wherein the communication management module is communicatively connected with the BMS battery management system (5) and the EMS energy management module (4).

7. The emergency power supply device for a shield machine according to claim 1, characterized in that: The energy safety device (7) includes: an aerosol fire extinguishing protection layer in the PACK box, a cluster-level active safety isolation functional layer, and a single-cabinet heptafluoropropane fire extinguishing device.

8. The emergency power supply device for a shield machine according to any one of claims 1 to 7, characterized in that: The application equipment includes: a cutter head and a pump station connected to the low-voltage busbar.

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