Protection device for underground mining electric locomotive

Abstract

The invention discloses a protection device for an underground mining electric locomotive. The protection device comprises a trailer, a connecting unit, a state monitoring unit and a controller, a storage battery is arranged on the trailer, and the connecting unit comprises a first connecting seat, a second connecting seat and an electromagnet; the first connecting seat is connected to the tail part of the underground mining electric locomotive, and a magnetic attraction part is arranged on the first connecting seat; the second connecting seat is connected to a trailer; and the electromagnet is arranged on the second connecting seat. The storage battery is arranged on the independent trailer, the underground mining electric locomotive and the trailer are connected through the separable connecting unit based on the magnetic attraction principle, the state monitoring unit used for monitoring whether the storage battery is in the abnormal state or not and the controller are matched, power supply can be cut off in time when the storage battery suddenly suffers from a safety accident, and the safety of the storage battery is guaranteed. And the underground mining electric locomotive is separated from the trailer in time, so that the threat to the whole underground mining electric locomotive and personnel on the locomotive can be effectively reduced when the safety accident of the storage battery suddenly occurs.

Description

Technical Field

[0001] The present invention relates to the technical field of underground mining locomotives, and more particularly, to a protection device for an underground mining locomotive. Background Art

[0002] The content of this section only provides background information related to the present invention, which may not constitute prior art.

[0003] Underground mining locomotives play an important role in underground transportation. According to the power source, the known underground mining locomotives can be divided into trolley wire type underground mining locomotives and battery type underground mining locomotives. Compared with trolley wire type underground mining locomotives, since battery type underground mining locomotives are powered by batteries, there is no need to install power supply lines underground, which has high flexibility and lower cost, and is widely used in small mines with poor ventilation conditions.

[0004] However, due to the complex underground environment and poor ventilation conditions, the temperature of the battery may rise sharply under abnormal conditions such as short circuit and over-discharge, so that safety accidents such as fires may occur. Moreover, the known battery type underground mining locomotives generally arrange the battery on the locomotive head, and the safety management of the battery is only limited to monitoring the operating indicators (such as temperature) of the battery. This management method is difficult to effectively deal with sudden safety accidents such as battery fires in the face of emergencies, thus posing a serious threat to the entire underground mining locomotive and the safety of the personnel on the vehicle. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a protection device for an underground mining locomotive, so as to at least overcome the drawbacks brought about by directly arranging the battery on the locomotive head of the known battery type underground mining locomotive and only monitoring the operating indicators of the battery for the safety management of the battery.

[0006] The purpose of the present invention is achieved through the following technical solutions: The present invention discloses a protection device for an underground mining locomotive, including: A trailer, on which a battery for powering the underground mining locomotive is provided; A connection unit, which includes a first connection seat, a second connection seat and an electromagnet; The first connection seat is connected to the tail of the underground mining locomotive, and a magnetic attraction part made of magnetic material is provided on the first connection seat; The second connection seat is connected to the trailer; The electromagnet is disposed on the second connection seat and contacts the magnetic attraction portion; the electromagnet is electrically connected to the battery; the electromagnet is configured to generate an electromagnetic attraction force when powered on, so as to be adsorbed and connected with the magnetic attraction portion; Condition monitoring units and controllers; The state monitoring unit is configured to obtain state information of the battery and send the state information to the controller; The controller is configured to determine whether the battery is in an abnormal state based on the state information; if so, the controller cuts off the power supply of the battery to cut off the power supply to the electromagnet, thereby releasing the adsorption connection between the electromagnet and the magnetic attraction part.

[0007] Optionally, a connecting groove is provided on a side of the first connecting seat away from the underground mining electric locomotive, and the magnetic attraction portion is provided at the innermost side of the connecting groove; The electromagnet is arranged on a side of the second connecting seat away from the trailer; The second connecting seat extends into the connecting groove at a side away from the trailer, so that the electromagnet contacts the magnetic attraction portion.

[0008] Optionally, the connection unit further includes a first power supply connector and a second power supply connector adapted to the first power supply connector; The first power supply connector is arranged at the innermost side of the connection groove, and the first power supply connector is electrically connected to the electrical equipment of the underground mining electric locomotive; The second power supply connector is disposed on a side of the second connection seat away from the trailer, and the second power supply connector is electrically connected to the battery; When the second connection seat extends into the connection groove away from the side of the trailer, the second power supply connector is plugged and matched with the first power supply connector.

[0009] Optionally, the innermost side of the connecting groove is provided with a first mounting groove for mounting the first power supply connector, and a second mounting groove for mounting the magnetic attraction portion; The second installation groove is arranged around the first installation groove; after installation, the first power supply connector and the magnetic attraction portion are in the same plane; A third mounting groove for mounting the second power supply connector and a fourth mounting groove for mounting the electromagnet are provided on a side of the second connecting seat facing away from the trailer; The fourth installation slot is located outside the third installation slot; after installation, the second power supply connector and the electromagnet are in the same plane.

[0010] Optionally, a first wire threading channel is provided on the first connection base; one end of the first wire threading channel communicates with the first mounting groove, and the other end of the first wire threading channel penetrates through the outer side wall of the first connection base; A second wire threading channel is provided on the second connection base; One end of the second wire threading channel communicates with the third mounting groove and the fourth mounting groove, and the other end of the second wire threading channel penetrates through the outer side wall of the second connection base.

[0011] Optionally, an elastic member is provided between the first connection base and the second connection base; The elastic member is configured to store an elastic force that forces the first connection base and the second connection base to separate when the electromagnet is energized and adsorbs and connects with the magnetic adsorption portion.

[0012] Optionally, a receiving groove extending in the direction of the underground mining locomotive is provided on the first connection base; the receiving grooves correspond to the elastic members one by one; One end of the elastic member is fixedly connected to the innermost side of the corresponding receiving groove, and the other end of the elastic member extends horizontally in the direction away from the underground mining locomotive; A pressing portion extending horizontally in the direction away from the trailer and corresponding to the receiving groove one by one is provided on the second connection base, and the pressing portion extends into the corresponding receiving groove to press the elastic member.

[0013] Optionally, there are multiple electromagnets, and the multiple electromagnets are connected in parallel.

[0014] Optionally, the protection device for the underground mining locomotive further includes: An angle monitoring unit configured to obtain the angle information between the underground mining locomotive and the horizontal ground and send the angle information to the controller; An acceleration monitoring unit configured to obtain the acceleration information of the underground mining locomotive and send the acceleration information to the controller; The controller is further configured to determine the angle between the underground mining locomotive and the horizontal ground based on the angle information, and determine the type of driving road condition of the underground mining locomotive based on the acceleration information; the type of driving road condition includes horizontal driving, uphill driving, and downhill driving; And, the controller is further configured to: determine the target number of electromagnets based on the electromagnetic attraction generated under the energized state of a single electromagnet, the total weight of the trailer and the storage battery, the angle between the underground mining locomotive and the horizontal ground, and the type of driving road condition of the underground mining locomotive.

[0015] Optionally, when the driving road condition type is horizontal driving, the calculation formula for the number of target electromagnets is: ; When the driving road condition type is uphill driving, the calculation formula for the number of target electromagnets is: ; When the driving road condition type is downhill driving, the calculation formula for the number of target electromagnets is: ; In the above three formulas, n is the number of target electromagnets, and n takes an integer; W is the total weight of the trailer and the storage battery; μ is the friction coefficient between the underground mining locomotive and the underground track; θ is the angle between the underground mining locomotive and the horizontal ground; F s is the electromagnetic attraction generated when a single electromagnet is in the energized state.

[0016] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: The protection device disclosed in the present invention, by arranging the storage battery on an independent trailer and using a separable connection unit based on the magnetic attraction principle to connect the underground mining locomotive and the trailer, cooperating with the state monitoring unit and the controller for monitoring whether the storage battery is in an abnormal state, can cut off the power supply in time when a safety accident occurs in the storage battery and separate the underground mining locomotive and the trailer in time. This method can effectively reduce the threat to the entire underground mining locomotive and the personnel on the vehicle when a safety accident occurs in the storage battery, and provides a reliable way to ensure the safety of the underground mining locomotive and the personnel on the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the protection device provided by the embodiment of the present invention; Figure 2 is a schematic structural diagram of the connection unit provided by the embodiment of the present invention; Figure 3 is Figure 2 a cross-sectional view of the connection unit shown in Figure 4 is a schematic structural diagram of the first connection seat and the first power supply connector provided by the embodiment of the present invention; Figure 5 is a cross-sectional view of the first connection seat provided by the embodiment of the present invention; Figure 6Schematic diagram of the second connection base, electromagnet, and second power supply connector provided by an embodiment of the present invention; Figure 7 Cross-sectional view of the second connection base provided by an embodiment of the present invention; Figure 8 Electrical principle block diagram of the protection device provided by an embodiment of the present invention.

[0018] Reference numerals: 10 - trailer, 11 - traveling chassis, 12 - battery box, 20 - connection unit, 21 - first connection base, 211 - connection groove, 212 - first installation groove, 213 - second installation groove, 214 - first wire threading channel, 215 - accommodation groove, 216 - first connection plate, 217 - first hinge pin, 218 - first connection portion, 22 - second connection base, 221 - third installation groove, 222 - fourth installation groove, 223 - second wire threading channel, 224 - pressing portion, 225 - second connection plate, 226 - second hinge pin, 227 - second connection portion, 2271 - annular protrusion, 23 - electromagnet, 24 - magnetic attraction portion, 25 - first power supply connector, 26 - second power supply connector, 27 - elastic member, 30 - status monitoring unit, 40 - controller, 50 - angle monitoring unit, 60 - acceleration monitoring unit, 70 - weight monitoring unit. Detailed implementation manners

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the detailed implementation manners. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0020] Compared with the embodiments shown in the drawings, the feasible implementation solutions within the scope of protection of the present invention may have fewer components, have other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0021] Embodiment 1

[0022] Embodiment 1 of the present invention discloses a protection device for an underground mining locomotive, especially a protection device suitable for a battery-powered underground mining locomotive. For the convenience of description, the protection device for an underground mining locomotive disclosed in the embodiments of the present invention will be briefly referred to as the "protection device" hereinafter.

[0023] Figure 1 FIG. 1 is a schematic diagram of the structure of an exemplary protection device disclosed in an embodiment of the present invention. Figure 1 In the illustrated embodiment, the protection device may include a trailer 10 and a connection unit 20 .

[0024] The trailer 10 is mainly used to carry the storage battery (not shown in the figure) required for the underground mining electric locomotive (not shown in the figure) to separate the storage battery from the entire underground mining electric locomotive. In addition, the trailer 10 is connected to the tail of the underground mining electric locomotive through the connecting unit 20, so that the trailer 10 can follow the underground mining electric locomotive to travel on the underground track.

[0025] like Figure 1 As shown, the trailer 10 may include a traveling chassis 11. The traveling chassis 11 is provided with a wheel pair suitable for moving on an underground track. A battery box 12 may be provided on the traveling chassis 11, and the battery box 12 is suitable for loading batteries used in underground mining electric locomotives, so that the battery box 12 plays a role in protecting the battery, and avoids the battery from being damaged by adverse factors such as falling rocks underground as much as possible.

[0026] The connection unit 20 can be connected to the traveling chassis 11 of the trailer 10 so that the underground mining electric locomotive can drive the trailer 10 to travel synchronously.

[0027] It can be understood that by independently arranging the battery used to power the underground mining electric locomotive on the trailer 10, compared with the method of directly arranging the battery on the locomotive head of the underground mining electric locomotive, it is beneficial to reduce the impact on the entire underground mining electric locomotive when sudden safety accidents such as battery fire occur.

[0028] On this basis, the inventor of the present application further discovered that even if the battery is arranged on the trailer 10 located at the rear of the underground mining electric locomotive, if the battery catches fire or other safety accidents in an emergency, it may also affect the underground mining electric locomotive and the personnel on the locomotive. Based on this, the inventor of the present application hopes to design a solution that can separate the trailer 10 from the underground mining electric locomotive in the event of a sudden safety accident of the battery, so as to further reduce the threat to the underground mining electric locomotive and the personnel on the locomotive in the event of a sudden safety accident of the battery.

[0029] In order to achieve the above objectives, the present invention first improves the structure of the connection unit 20, so that the connection unit 20 can separate the trailer 10 from the underground mining electric locomotive when a battery accident occurs.

[0030] Specifically, combined Figure 2 and Figure 3 As shown, the connecting unit 20 may include a first connecting socket 21 , a second connecting socket 22 and an electromagnet 23 .

[0031] The first connecting seat 21 can be connected to the tail of the underground mining locomotive. And, a magnetic attraction part 24 made of magnetic material is arranged on the first connecting seat 21. Among them, the magnetic material can be a permanent magnet.

[0032] The second connecting seat 22 can be connected to the trailer 10, especially can be connected to the running chassis 11 of the trailer 10.

[0033] The electromagnet 23 is arranged on the second connecting seat 22 and contacts with the magnetic attraction part 24. The electromagnet 23 can be electrically connected to the storage battery on the trailer 10 to supply power to the electromagnet 23 through the storage battery.

[0034] And, the electromagnet 23 is configured to generate sufficient electromagnetic attraction force in the energized state to be reliably adsorbed and connected with the magnetic attraction part 24; in the de-energized state, the adsorption connection with the magnetic attraction part 24 is released.

[0035] It can be understood that by adopting the above settings, in the normal running state of the underground mining locomotive, the electromagnet 23 is always in the energized state. At this time, the electromagnet 23 and the magnetic attraction part 24 are firmly adsorbed and connected together, so that the underground mining locomotive can drive the trailer 10 to run synchronously by means of the connecting unit 20; on the contrary, when it is necessary to separate the underground mining locomotive from the trailer 10, for example, when a sudden safety accident such as a fire occurs to the storage battery, only the electromagnet 23 needs to be de-energized. At this time, the electromagnet 23 no longer generates electromagnetic attraction force, and the adsorption connection state between the electromagnet 23 and the magnetic attraction part 24 is released, so that the running underground mining locomotive is separated from the trailer 10 under the action of inertia, and the trailer 10 will gradually stop due to loss of power, thereby reducing the threat to the underground mining locomotive and the personnel on it as much as possible when a sudden safety accident occurs to the storage battery.

[0036] Among them, in order to realize that the electromagnet 23 can be de-energized in time when a sudden safety accident occurs to the storage battery, so that the underground mining locomotive is separated from the trailer 10, the protection device disclosed in Embodiment 1 of the present invention may further include a state monitoring unit 30 and a controller 40.

[0037] Refer to Figure 8 As shown, both the state monitoring unit 30 and the electromagnet 23 are communicatively connected to the controller 40. The state monitoring unit 30 is configured to obtain the state information of the storage battery on the trailer 10 and send the state information to the controller 40.

[0038] Among them, the status information may include the image information of the storage battery. When the image information is used as the status information, the status monitoring unit 30 may be a camera (not shown in the figure) arranged on the trailer 10 and aligned with the storage battery to obtain the image of the storage battery on the trailer 10 in real time through the camera. Further, the camera may be an infrared thermal imaging camera to obtain high-quality image information of the storage battery.

[0039] The controller 40 is configured to determine whether the storage battery is in an abnormal state based on the status information sent by the status monitoring unit 30, that is, to determine whether a safety accident such as a fire has occurred to the storage battery according to the image sent by the camera. If so, the controller 40 cuts off the power supply of the storage battery, so that the electromagnet 23 is powered off, thereby releasing the adsorption connection between the electromagnet 23 and the magnetic attraction part 24, and further separating the underground mining locomotive from the trailer 10; if not, the controller 40 cooperates with the status monitoring unit 30 to continue monitoring the status of the storage battery.

[0040] It can be seen that the protection device disclosed in Embodiment 1 of the present invention, by arranging the storage battery on the independent trailer 10 and using the separable connection unit 20 based on the magnetic attraction principle to connect the underground mining locomotive and the trailer 10, cooperating with the status monitoring unit 30 and the controller 40 for monitoring whether the storage battery is in an abnormal state, can cut off the power supply in time when a safety accident occurs to the storage battery, and separate the underground mining locomotive from the trailer 10 in time. This method can effectively reduce the threat to the entire underground mining locomotive and the personnel on the vehicle when a safety accident occurs to the storage battery, and provides a reliable way to ensure the safety of the underground mining locomotive and the personnel on the vehicle.

[0041] Moreover, by using the cooperation of the electromagnet 23 and the magnetic attraction part 24 to realize the separation of the underground mining locomotive and the trailer 10, based on the excellent response speed of the electromagnet 23, the separation action can be completed in a very short time. And this design structure is simple, reducing the complexity of mechanical components and maintenance costs. When a safety accident occurs to the storage battery, all power supplies can be directly cut off, including the power supply to the underground mining locomotive, ensuring that the entire system can enter a safe state in a shorter time and avoiding potential safety hazards caused by power-off delay.

[0042] In some embodiments, a backup power supply for supplying power to the underground mining locomotive may also be provided on the underground mining locomotive (not shown in the figure). Among them, in the normal state, the backup power supply is not enabled, and the underground mining locomotive relies on the storage battery on the trailer 10 for power supply. When the underground mining locomotive is separated from the trailer 10, resulting in a power outage of the underground mining locomotive, the backup power supply is enabled so that the underground mining locomotive separated from the trailer 10 still has the ability to drive independently, thereby staying away from the trailer 10 where a safety accident has occurred, and further ensuring the safety of the underground mining locomotive and the personnel on the vehicle.

[0043] In some embodiments, in combination with Figure 3 as shown, the connecting unit 20 may further include a first power supply connector 25 and a second power supply connector 26 adapted to the first power supply connector 25. The first power supply connector 25 may be disposed on the first connecting seat 21, and the first power supply connector 25 may be electrically connected to an electrical device on the underground mining locomotive through a cable. The second power supply connector 26 may be disposed on the second connecting seat 22, and the second power supply connector 26 may be electrically connected to the battery on the trailer 10 through a cable, and the second power supply connector 26 and the first power supply connector 25 can be plugged and matched with each other.

[0044] It can be understood that through the arrangement of the first power supply connector 25 and the second power supply connector 26, in the normal state, the first power supply connector 25 and the second power supply connector 26 are plugged and matched, so that the battery can normally supply power to the underground mining locomotive; conversely, when the electromagnet 23 is powered off to separate the underground mining locomotive from the trailer 10, the first power supply connector 25 and the second power supply connector 26 will automatically separate, thereby completely cutting off the power supply of the underground mining locomotive.

[0045] Among them, the first power supply connector 25 and the second power supply connector 26 may be a socket and a plug respectively.

[0046] In some embodiments, in combination with Figure 4 and Figure 5 as shown, a connecting groove 211 extending in the direction of the underground mining locomotive is provided on the side of the first connecting seat 21 facing away from the underground mining locomotive, and the magnetic attraction part 24 is disposed at the innermost side of the connecting groove 211, that is, on the side of the connecting groove 211 close to the underground mining locomotive.

[0047] In combination with Figure 6 as shown, the electromagnet 23 is disposed on the side of the second connecting seat 22 facing away from the trailer 10. The side of the second connecting seat 22 facing away from the trailer 10 extends into the connecting groove 211 in the manner as Figure 3 shown, so that the electromagnet 23 is in contact with the magnetic attraction part 24.

[0048] Such a design helps to optimize the structural design of the connecting unit 20, so that the structure of the connecting unit 20 is more compact and beautiful, and can serve the purpose of protecting the electromagnet 23.

[0049] In some embodiments, the first power supply connector 25 may also be disposed at the innermost side of the connecting groove 211. For example, referring to Figure 4 as shown, the first power supply connector 25 may be disposed at the exact center of the innermost side of the connecting groove 211, and the magnetic attraction part 24 may be disposed in a form surrounding the first power supply connector 25.

[0050] Referring to Figure 6As shown, the second power supply connector 26 can be arranged on the side of the second connector seat 22 away from the trailer 10, and the second power supply connector 26 is located at the exact center of the side of the second connector seat 22 away from the trailer 10. The electromagnet 23 can be arranged around the second power supply connector 26.

[0051] When the side of the second connector seat 22 away from the trailer 10 extends into the connection groove 211, the second power supply connector 26 is inserted and matched with the first power supply connector 25, and at the same time, the electromagnet 23 can also be in contact with the magnetic attraction part 24. With such a design, the purpose of protecting the inserted and matched first power supply connector 25 and second power supply connector 26 can be achieved.

[0052] In some embodiments, as Figure 5 shown, a first installation groove 212 for installing the first power supply connector 25 and a second installation groove 213 for installing the magnetic attraction part 24 are provided at the innermost side of the connection groove 211. The second installation groove 213 can be arranged around the first installation groove 212. And after installation, the first power supply connector 25 and the magnetic attraction part 24 are in the same plane.

[0053] As Figure 7 shown, a third installation groove 221 for installing the second power supply connector 26 and a fourth installation groove 222 for installing the electromagnet 23 are provided on the side of the second connector seat 22 away from the trailer 10. The fourth installation groove 222 is located outside the third installation groove 221. And after installation, the second power supply connector 26 and the electromagnet 23 are in the same plane.

[0054] It can be understood that with such a design, when the side of the second connector seat 22 away from the trailer 10 extends into the connection groove 211, it helps the first power supply connector 25 to be smoothly inserted and matched with the second power supply connector 26, and can make the contact surface between the electromagnet 23 and the magnetic attraction part 24 be a plane, thereby being beneficial to improving the adsorption connection effect between the electromagnet 23 and the magnetic attraction part 24.

[0055] In some embodiments, combining Figure 3 and Figure 5 shown content, a first wire threading channel 214 is provided on the first connector seat 21. One end of the first wire threading channel 214 is communicated with the first installation groove 212, and the other end of the first wire threading channel 214 penetrates through the outer side wall of the first connector seat 21. The first wire threading channel 214 is mainly used for the cable between the underground mine locomotive and the first power supply connector 25 to pass through, so as to smoothly realize the electrical connection between the electrical equipment on the underground mine locomotive and the first power supply connector 25.

[0056] Combining Figure 3 and Figure 7As shown, a second wire threading channel 223 is provided on the second connection base 22. One end of the second wire threading channel 223 communicates with the third installation groove 221 and the fourth installation groove 222, and the other end of the second wire threading channel 223 penetrates through the outer side wall of the second connection base 22. The second wire threading channel 223 is mainly used for the cables between the second power supply connector 26 and the storage battery, and between the electromagnet 23 and the storage battery to pass through, so as to smoothly realize the electrical connection between the second power supply connector 26 and the storage battery, and between the electromagnet 23 and the storage battery.

[0057] It can be understood that through the setting of the wire threading channel, it can also play a role in managing and protecting the cables, which is beneficial to avoiding the entanglement of the cables between the first connection base 21 and the second connection base 22.

[0058] In some embodiments, there can be multiple electromagnets 23, and the multiple electromagnets 23 are connected in parallel. That is, the multiple electromagnets 23 can all work independently or stop working under the control of the controller 40.

[0059] By adopting multiple parallel-connected electromagnets 23, it helps that when some electromagnets 23 are damaged, fail or malfunction, the remaining normal electromagnets 23 can be relied on to adsorb and connect with the magnetic attraction part 24, so as to realize the redundant design of electromagnetic adsorption and further improve the reliability of the connection unit 20.

[0060] Among them, when there are multiple electromagnets 23, the multiple electromagnets 23 can be distributed in a form of a circular array centered on the second power supply connector 26. For example, referring to Figure 6 As shown, the figure of the present invention shows a situation where six electromagnets 23 are provided on the second connection base 22.

[0061] In some embodiments, referring to Figure 3 As shown, an elastic member 27 is further provided between the first connection base 21 and the second connection base 22. The elastic member 27 is configured to store an elastic force that forces the first connection base 21 and the second connection base 22 to separate when the electromagnet 23 is energized so that the electromagnet 23 adsorbs and connects with the magnetic attraction part 24. Among them, the elastic member 27 can be a straight spring.

[0062] Specifically, in the normal state, the electromagnet 23 remains energized. At this time, the elastic member 27 is compressed to store an elastic force that forces the first connection base 21 and the second connection base 22 to separate. When the electromagnet 23 is powered off to release the adsorption connection between the electromagnet 23 and the magnetic attraction part 24, the elastic member 27 can release the stored elastic force, so as to accelerate the separation of the first connection base 21 and the second connection base 22, and further accelerate the separation of the underground mining locomotive and the trailer 10.

[0063] Combined with Figure 4 and Figure 5As shown, a first connection seat 21 is provided with a receiving groove 215 extending in the direction of the underground mining electric locomotive on the side away from the underground mining electric locomotive. The receiving groove 215 corresponds to the elastic member 27 one by one, one end of the elastic member 27 is fixedly connected to the innermost side of the corresponding receiving groove 215, that is, the side of the receiving groove 215 close to the underground mining electric locomotive, and the other end of the elastic member 27 extends horizontally in the direction away from the underground mining electric locomotive.

[0064] Combination Figure 3 or Figure 6 As shown, the second connecting seat 22 is provided with a pressing portion 224 extending horizontally in a direction away from the trailer 10 and corresponding to the receiving groove 215 one by one, and the pressing portion 224 can extend into the corresponding receiving groove 215 to press the elastic member 27 in the receiving groove 215.

[0065] Arranging the elastic member 27 in the above manner can play a guiding role through the cooperation between the accommodating groove 215 and the pressing portion 224, thereby helping to make the elastic force released by the elastic member 27 directly act on the first connecting seat 21 and the second connecting seat 22 in the horizontal direction, thereby avoiding the waste of elastic force as much as possible.

[0066] Furthermore, a plurality of elastic members 27 may be provided, and the plurality of elastic members 27 may be distributed in a ring array around the connection groove 211. This design not only increases the elastic force forcing the first connection seat 21 and the second connection seat 22 to separate, but also helps to make the elastic force acting on the first connection seat 21 and the second connection seat 22 more uniform. Figure 4 As shown, the number of the elastic members 27 can be eight. In this case, the first connecting seat 21 is provided with eight receiving grooves 215 corresponding to the elastic members 27 one by one.

[0067] In some embodiments, in combination Figure 2 As shown in the figure, the first connection seat 21 may include a first connection plate 216, a first hinge pin 217 and a first connection portion 218. The first connection plate 216 is suitable for connecting to the tail of an underground mining electric locomotive, and the first connection portion 218 is hingedly connected to the first connection plate 216 through the first hinge pin 217. The aforementioned magnetic attraction portion 24, the first power supply connector 25, the elastic member 27 and other components may be arranged on the first connection portion 218, see Figure 3 For example, the connecting groove 211 and the containing groove 215 can be opened on the side of the first connecting portion 218 away from the first connecting plate 216. Figure 5 , so as to realize the installation of the magnetic attraction part 24, the first power supply connector 25, the elastic member 27 and other components. The first connecting part 218 can be cylindrical to optimize the structural design of the first connecting seat 21.

[0068] The second connecting seat 22 may include a second connecting plate 225, a second hinge pin 226, and a second connecting portion 227. The second connecting plate 225 is adapted to be connected to the trailer 10, particularly the running chassis 11 of the trailer 10. The second connecting portion 227 is hingedly connected to the second connecting plate 225 through the second hinge pin 226. The aforementioned electromagnet 23, the second power supply connector 26, the pressing portion 224, etc. may be disposed on the second connecting portion 227, see Figure 3 . For example, a third mounting groove 221 and a fourth mounting groove 222 may be formed on a side of the second connecting portion 227 facing away from the second connecting plate 225 to achieve the installation of the electromagnet 23 and the second power supply connector 26. The pressing portion 224 may be directly disposed on the annular protrusion 2271 of the second connecting portion 227, see Figure 6 or Figure 7 . The second connecting portion 227 may also be cylindrical to optimize the structural design of the second connecting seat 22.

[0069] It can be understood that using the connecting seat in the above hinge form helps to improve the freedom between the underground mining locomotive and the trailer 10, so that the underground mining locomotive can at least drive the trailer 10 to turn smoothly (i.e., drive on a curve).

[0070] Embodiment 2

[0071] On the basis of Embodiment 1, considering that when the underground mining locomotive travels on the underground track, its driving road conditions are variable. In addition to the horizontal driving situation, there are also uphill driving and downhill driving situations. These different road condition types pose different requirements for the traction connection between the underground mining locomotive and the trailer 10. Specifically, when the underground mining locomotive travels under different road conditions, the electromagnetic attraction provided by the electromagnet 23 must be sufficient to overcome the additional force generated due to the road condition change to ensure that the electromagnet 23 and the magnetic attraction portion 24 always maintain a reliable adsorption connection and will not become detached.

[0072] For example, when the underground mining locomotive travels horizontally, the electromagnetic attraction provided by the electromagnet 23 is mainly used to overcome the friction between the trailer 10 and the underground track to ensure a reliable adsorption connection between the electromagnet 23 and the magnetic attraction portion 24; when the underground mining locomotive travels uphill, in addition to the friction between the trailer 10 and the underground track, the electromagnetic attraction provided by the electromagnet 23 also needs to overcome the component force of the trailer 10's gravity along the inclined plane, and the required electromagnetic attraction is the largest at this time; when the underground mining locomotive travels downhill, the component force of the trailer 10's gravity along the inclined plane will help to overcome the friction between the trailer 10 and the underground track, thereby reducing the required electromagnetic attraction, and the required electromagnetic attraction is the smallest at this time.

[0073] It is known that the electromagnetic attraction force generated by a single electromagnet 23 in the energized state is fixed. On this basis, although sufficient electromagnetic attraction force can be provided by adding more electromagnets 23 so that the electromagnet 23 and the magnetic adsorption part 24 can always maintain a reliable adsorption connection when the underground mining locomotive travels on different road conditions, if a large number of electromagnets 23 work simultaneously all the time, the energy consumption will be significantly increased. This will not only reduce the energy efficiency of the system, but also may shorten the service life of the storage battery and increase the maintenance cost.

[0074] For this reason, Embodiment 2 of the present invention discloses another protection device. Different from Embodiment 1, in the case where the number of electromagnets 23 is multiple and the multiple electromagnets 23 are connected in parallel, it is expected to monitor the driving road conditions of the underground mining locomotive and combine the weight of the trailer 10 together with the storage battery to dynamically adjust the number of electromagnets 23 required to work under different road conditions, so as to realize the rational utilization of resources while ensuring a reliable adsorption connection between the electromagnet 23 and the magnetic adsorption part 24.

[0075] Specifically, the protection device disclosed in Embodiment 2 of the present invention may further include an angle monitoring unit 50 and an acceleration monitoring unit 60.

[0076] Both the angle monitoring unit 50 and the acceleration monitoring unit 60 can be arranged on the underground mining locomotive, especially on the locomotive head of the underground mining locomotive. And with reference to Figure 8 As shown, both the angle monitoring unit 50 and the acceleration monitoring unit 60 are communicatively connected to the controller 40.

[0077] Among them, the angle monitoring unit 50 is configured to obtain the angle information between the underground mining locomotive and the horizontal ground and send the angle information to the controller 40.

[0078] At this time, the controller 40 is further configured to determine the angle between the underground mining locomotive and the horizontal ground based on the angle information sent by the angle monitoring unit 50. For example, the angle monitoring unit 50 may be an inclination sensor arranged on the underground mining locomotive.

[0079] Through the cooperation of the angle monitoring unit 50 and the controller 40, the angle between the underground mining locomotive and the horizontal ground can be directly obtained, and it can assist in judging whether the underground mining locomotive is traveling horizontally or on an inclined plane.

[0080] The acceleration monitoring unit 60 is configured to obtain the acceleration information of the underground mining locomotive and send the acceleration information to the controller 40.

[0081] The controller 40 is further configured to determine the type of driving road condition of the underground mining locomotive based on the acceleration information sent by the acceleration monitoring unit 60. For example, the acceleration monitoring unit 60 may be an acceleration sensor disposed on the underground mining locomotive.

[0082] It can be understood that the accelerations of the underground mining locomotive during horizontal driving, uphill driving, and downhill driving are often different. Therefore, through the cooperation of the acceleration monitoring unit 60 and the controller 40, the type of driving road condition of the underground mining locomotive can be obtained based on the acceleration during the driving of the underground mining locomotive. Among them, the types of driving road conditions include horizontal driving, uphill driving, and downhill driving.

[0083] Moreover, the controller 40 is configured to: determine the number of target electromagnets 23 based on the electromagnetic attraction generated under the energized state of a single electromagnet 23, the total weight of the trailer 10 and the storage battery, the angle between the underground mining locomotive and the horizontal ground, and the type of driving road condition of the underground mining locomotive, so as to dynamically adjust the number of electromagnets 23 that need to work according to the type of driving road condition of the underground mining locomotive, so as to achieve the rational utilization of resources. Among them, the number of target electromagnets 23 is also the number of electromagnets 23 that need to work.

[0084] Specifically, when the type of driving road condition is horizontal driving, the electromagnetic attraction basically only needs to overcome the friction between the trailer 10 and the underground track, so as to enable a reliable adsorption connection between the electromagnet 23 and the magnetic adsorption part 24. Therefore, the minimum electromagnetic attraction required at this time is approximately the friction between the trailer 10 and the underground track, that is: ; In the above formula, F min is the minimum electromagnetic attraction; W is the total weight of the trailer 10 and the storage battery; μ is the friction coefficient between the underground mining locomotive and the underground track.

[0085] Then at this time, the calculation formula for the number of target electromagnets 23 is: ; In the above formula, n is the number of target electromagnets 23, and n is rounded up; F s is the electromagnetic attraction generated under the energized state of a single electromagnet 23.

[0086] When the driving road condition type is uphill driving, the electromagnetic attraction force not only needs to overcome the friction force between the trailer 10 and the underground track, but also needs to overcome the component force of the gravity of the trailer 10 on the inclined plane, so as to make a reliable adsorption connection between the electromagnet 23 and the magnetic adsorption part 24. At this time, the minimum electromagnetic attraction force required is approximately: ; In the above formula, F min is the minimum electromagnetic attraction force; W is the total weight of the trailer 10 and the storage battery; μ is the friction coefficient between the underground mining locomotive and the underground track; θ is the angle between the underground mining locomotive and the horizontal ground.

[0087] Then at this time, the calculation formula for the number of target electromagnets 23 is: ; In the above formula, n is the number of target electromagnets 23, and n takes an integer; F s is the electromagnetic attraction force generated by a single electromagnet 23 in the energized state.

[0088] When the driving road condition type is downhill driving, the electromagnetic attraction force only needs to overcome the friction force between the trailer 10 and the underground track to make a reliable adsorption connection between the electromagnet 23 and the magnetic adsorption part 24. And the component force of the gravity of the trailer 10 on the inclined plane will offset part of the friction force between the trailer 10 and the underground track. Therefore, the minimum electromagnetic attraction force required at this time is approximately: ; In the above formula, F min is the minimum electromagnetic attraction force; W is the total weight of the trailer 10 and the storage battery; μ is the friction coefficient between the underground mining locomotive and the underground track; θ is the angle between the underground mining locomotive and the horizontal ground.

[0089] Then at this time, the calculation formula for the number of target electromagnets 23 is: ; In the above formula, n is the number of target electromagnets 23, and n takes an integer; F s is the electromagnetic attraction force generated by a single electromagnet 23 in the energized state; θ is the angle between the underground mining locomotive and the horizontal ground.

[0090] Based on this, it only requires the controller 40 to select the corresponding calculation formula according to the driving road condition type, and then the number of target electromagnets 23 can be calculated.

[0091] Generally, the friction coefficient between the underground mine locomotive and the underground track μ is usually between 0.13 and 0.2. To ensure a reliable adsorption connection between the electromagnet 23 and the magnetic adsorption part 24, the maximum friction coefficient can be taken for calculation, that is, 0.2. The electromagnetic attraction generated by a single electromagnet 23 in the energized state F s is determined according to the actually selected model of the electromagnet 23, and the total weight of the trailer 10 and the storage battery W can be calculated by weighing the total mass of the trailer 10 and the storage battery in advance, or can be dynamically obtained by the method to be described below.

[0092] For example, assume that the total weight of the trailer 10 and the storage battery W is 10000N; the friction coefficient between the underground mine locomotive and the underground track μ is 0.2; the electromagnetic attraction generated by a single electromagnet 23 in the energized state F s is 700N; when the underground mine locomotive is driving uphill and downhill, the angle between the underground mine locomotive and the horizontal ground θ is 10°. Then: When the driving road condition type is horizontal driving, the calculation process of the number of target electromagnets 23 is: n =10000×0.2 / 700 = 2.86, then n take 3. That is, when the underground mine locomotive is driving horizontally, the controller 40 needs to control 3 electromagnets 23 to work.

[0093] When the driving road condition type is uphill driving, the calculation process of the number of target electromagnets 23 is: n =(10000×0.2×cos10° + 10000×sin10°) / 700 = 5.3, then n take 6. That is, when the underground mine locomotive is driving uphill, the controller 40 needs to control 6 electromagnets 23 to work.

[0094] When the driving road condition type is downhill driving, the calculation process of the number of target electromagnets 23 is: n =(10000×0.2×cos10° - 10000×sin10°) / 700 = 0.33, then nTake 1. That is, when the underground mine locomotive travels downhill, the controller 40 needs to control 1 electromagnet 23 to work.

[0095] In practice, the controller 40 only needs to control the corresponding number of electromagnets 23 to work according to the determined number of target electromagnets 23, so as to ensure a reliable adsorption connection between the electromagnet 23 and the magnetic adsorption part 24, and at the same time, by reasonably controlling the number of electromagnets 23 that need to work, the rational utilization of resources can be achieved.

[0096] In some embodiments, considering that in the actual application process, there may also be a situation of temporarily increasing or decreasing the batteries on the trailer 10, and, as the service time of the trailer 10 increases, the weight of the battery box 12 may also change due to the influence of foreign objects, dust, etc.

[0097] Therefore, the protection device disclosed in Embodiment 2 of the present invention may further include a weight monitoring unit 70, and the weight monitoring unit 70 may be disposed between the walking chassis 11 of the trailer 10 and the battery box 12. The weight monitoring unit 70 is communicatively connected to the controller 40.

[0098] The weight monitoring unit 70 is configured to obtain the weight information of the battery box 12 and send the weight information to the controller 40. Among them, the weight monitoring unit 70 may be a weight sensor disposed between the walking chassis 11 and the battery box 12.

[0099] At this time, the controller 40 is further configured to determine the total weight of the trailer 10 and the battery based on the weight information sent by the weight monitoring unit 70 and the pre-stored weight information of the walking chassis 11.

[0100] It can be understood that through the cooperation of the weight monitoring unit 70 and the controller 40, the purpose of dynamically determining the total weight of the trailer 10 and the battery can be achieved, which helps to improve the accuracy of the calculated number of target electromagnets 23.

[0101] Embodiment 3

[0102] On the basis of Embodiment 2, combined with the content described in Embodiment 1, when an elastic member 27 is provided between the first connecting seat 21 and the second connecting seat 22, the pre-stored elastic force of all elastic members 27 should also be considered when calculating the number of target electromagnets 23. That is, the magnetic attraction force generated when the target electromagnet 23 is energized also needs to overcome the pre-stored elastic force of all elastic members 27.

[0103] At this time, in different driving road condition types, the calculation formulas for the number of target electromagnets 23 are as follows: When the driving road condition type is horizontal driving, the calculation formula for the number of target electromagnets 23 is: ; When the driving road condition type is uphill driving, the calculation formula for the number of target electromagnets 23 is: ; When the driving road condition type is downhill driving, the calculation formula for the number of target electromagnets 23 is: ; In the above three formulas, n is the number of target electromagnets 23; W is the total weight of the trailer 10 and the storage battery; μ is the friction coefficient between the underground mine locomotive and the underground track; F s is the electromagnetic attraction generated when a single electromagnet 23 is in the energized state; θ is the angle between the underground mine locomotive and the horizontal ground; F t is the elastic force pre-stored in all elastic members 27.

[0104] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A protection device for an underground mine locomotive, characterized in that, include: A trailer, wherein the trailer is provided with a battery for supplying power to an underground mining electric locomotive; A connecting unit, the connecting unit comprising a first connecting seat, a second connecting seat and an electromagnet; The first connection seat is connected to the tail of the underground mining electric locomotive, and the first connection seat is provided with a magnetic attraction portion made of magnetic material; A second connection base is connected to the trailer; The electromagnet is disposed on the second connection seat and contacts the magnetic attraction portion; the electromagnet is electrically connected to the battery; the electromagnet is configured to generate an electromagnetic attraction force when powered on, so as to be adsorbed and connected with the magnetic attraction portion; Condition monitoring units and controllers; The state monitoring unit is configured to obtain state information of the battery and send the state information to the controller; The controller is configured to determine whether the battery is in an abnormal state based on the state information; If so, the controller cuts off the power supply of the battery to cut off the power supply of the electromagnet, thereby releasing the adsorption connection between the electromagnet and the magnetic attraction part.

2. The protection device for an underground mine locomotive according to claim 1, characterized in that, A connecting groove is provided on a side of the first connecting seat away from the underground mining electric locomotive, and the magnetic attraction portion is provided at the innermost side of the connecting groove; The electromagnet is arranged on a side of the second connecting seat away from the trailer; The second connecting seat extends into the connecting groove at a side away from the trailer, so that the electromagnet contacts the magnetic attraction portion.

3. The protection device for an underground mine locomotive according to claim 2, characterized in that, The connecting unit further comprises a first power supply connector and a second power supply connector adapted to the first power supply connector; The first power supply connector is arranged at the innermost side of the connection groove, and the first power supply connector is electrically connected to the electrical equipment of the underground mining electric locomotive; The second power supply connector is disposed on a side of the second connection seat away from the trailer, and the second power supply connector is electrically connected to the battery; When the second connection seat extends into the connection groove away from the side of the trailer, the second power supply connector is plugged and matched with the first power supply connector.

4. The protection device for an underground mine locomotive according to claim 3, characterized in that, The innermost side of the connecting groove is provided with a first mounting groove for mounting the first power supply connector, and a second mounting groove for mounting the magnetic attraction portion; The second installation groove is arranged around the first installation groove; after installation, the first power supply connector and the magnetic attraction portion are in the same plane; A third mounting groove for mounting the second power supply connector and a fourth mounting groove for mounting the electromagnet are provided on a side of the second connecting seat facing away from the trailer; The fourth installation slot is located outside the third installation slot; after installation, the second power supply connector and the electromagnet are in the same plane.

5. The protection device for an underground mine locomotive according to claim 4, characterized in that, A first threading channel is provided on the first connection seat; one end of the first threading channel is connected to the first mounting groove, and the other end of the first threading channel passes through the outer side wall of the first connection seat; The second connecting seat is provided with a second threading channel; One end of the second threading channel is communicated with the third mounting groove and the fourth mounting groove, and the other end of the second threading channel passes through the outer side wall of the second connecting seat.

6. The protection device for an underground mine locomotive according to claim 1, characterized in that, An elastic member is provided between the first connecting seat and the second connecting seat; The elastic member is configured to store an elastic force that forces the first connecting seat and the second connecting seat to separate when the electromagnet is energized and adsorbs and connects to the magnetic attracting portion.

7. The protection device for an underground mine locomotive according to claim 6, characterized in that, A receiving groove extending in the direction of the underground mining locomotive is provided on the first connecting seat; the receiving grooves correspond to the elastic members one by one; One end of the elastic member is fixedly connected to the innermost side of the corresponding receiving groove, and the other end of the elastic member extends horizontally in the direction away from the underground mining locomotive; A pressing portion extending horizontally in the direction away from the trailer and corresponding to the receiving groove one by one is provided on the second connecting seat, and the pressing portion extends into the corresponding receiving groove to press the elastic member.

8. The protection device for an underground mine locomotive according to claim 1, characterized in that,There are multiple electromagnets, and the multiple electromagnets are connected in parallel.

9. The protection device for underground mining locomotives according to claim 8, wherein, It further includes: An angle monitoring unit configured to obtain the angle information between the underground mining locomotive and the horizontal ground and send the angle information to the controller; An acceleration monitoring unit configured to obtain the acceleration information of the underground mining locomotive and send the acceleration information to the controller; The controller is further configured to determine the angle between the underground mining locomotive and the horizontal ground based on the angle information, and determine the driving road condition type of the underground mining locomotive based on the acceleration information; the driving road condition type includes horizontal driving, uphill driving, and downhill driving; Moreover, the controller is further configured to: determine the target number of electromagnets based on the electromagnetic attraction generated under the energized state of a single electromagnet, the total weight of the trailer and the storage battery, the angle between the underground mining locomotive and the horizontal ground, and the driving road condition type of the underground mining locomotive.

10. The protection device for underground mining locomotives according to claim 9, wherein, When the driving road condition type is horizontal driving, the calculation formula for the target number of electromagnets is: ； When the driving road condition type is uphill driving, the calculation formula for the target number of electromagnets is: ； When the driving road condition type is downhill driving, the calculation formula for the target number of electromagnets is: ； In the above three formulas, n is the number of target electromagnets, and n takes an integer; W is the total weight of the trailer and the storage battery; μ is the friction coefficient between the underground mining locomotive and the underground track; θ is the angle between the underground mining locomotive and the horizontal ground; F s is the electromagnetic attraction generated when a single electromagnet is in the energized state.

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