JP5373204B2 - Rock drilling equipment - Google Patents

Description

Background of the Invention

  The present invention relates to a rock drilling device provided with a connection means to an electric working device and a power supply network.

  Generally, a rock drilling rig working device is electric. In such a case, the rock drilling rig is connected to the power network at least at the work point during the work phase. In particular, at tunnel construction sites and other construction sites, rock drilling rigs are used for a short period of time during the entire construction process. Be transported. Transfer from one site to another will only work if both sites have the same voltage level on the power grid. If the voltage levels of the individual site power grids are different, the voltage level must be transformed with a transformer to adapt to the working equipment of the rock drilling rig. Due to its size, its cumbersomeness and the associated high costs, rock drilling rigs are only used in the field where the voltage level of the power grid that powers the rock drilling rig is adapted to the rig's work equipment.

BRIEF DESCRIPTION OF THE INVENTION

  An object of this invention is to provide a novel rock drilling equipment.

  The rock drilling equipment according to the present invention is characterized by the following points. That is, the rock drilling equipment includes a transforming means for transforming the voltage level from high voltage to low voltage or from low voltage to high voltage as necessary. The rock drilling equipment includes working devices having different voltage levels, and The rock equipment includes connection means for supplying power directly to some of the electric working apparatuses from a power supply network and supplying electric power to some of the electric working apparatuses via a transformer. Therefore, it is possible to select a working device that receives power supply directly from the power supply network according to the voltage level by the connecting means.

  The idea of the present invention is as follows. That is, the rock drilling equipment or the rock drilling device provided with the means for connecting to the electric working device and the power supply network further includes a transformer for transforming the voltage level. Further, the rock drilling equipment is provided with an electric working device having at least two different voltage levels, that is, the rock drilling equipment is provided with an electric working device having voltage levels of different sizes, and further, The rock equipment is provided with connecting means for supplying power directly to some of the electric working apparatuses from the power supply network and supplying electric power to some of the electric working apparatuses via a transformer. Thereby, it is possible to realize a rock drilling device that can be used by being connected to a power supply network having at least two different voltage levels. However, since only some of the working devices of the rock drilling equipment are supplied with electric power through the transformer means, the size of the transformer means provided in the rock drilling equipment is not so large. The transformer means is preferably a transformer, in which case the same device can be used when raising the voltage level or lowering the voltage level. The transformer has a simple and reliable structure, and in the application according to the present invention, its volume and weight are sufficiently suitable as a transformer used for rock drilling equipment.

Some of the embodiments of the present invention will be described in detail with reference to the accompanying drawings.
It is a schematic side view which shows a rock drilling rig. A diagram of the feeding mechanism of the rock drilling rig is shown.

  For the sake of clarity, the figures briefly show some embodiments of the present invention. In the figures, like reference numerals are considered similar elements.

Detailed Description of the Invention

  FIG. 1 shows a rock drilling rig 1, which comprises one or more mining equipment 2. The rock drilling rig 1 includes a carriage 3 that can be moved by a drive unit 4. The drive device 4 includes one or more drive motors 5 and one or more transmission means 6 for transmitting a driving force to one or more wheels 7. The driving force transmission device may include a mechanical gear system and a mechanical transmission member, or the driving force transmission device may be hydraulic or electric. The carriage 3 may be provided with one or more booms 8, and the booms may be equipped in the excavation work device 2. In the embodiment shown in FIG. 1, the first boom 8 a is an excavation boom, and a rock drilling device 9 including a feed beam 10 is provided at the outer end thereof. It can move along. The rock drill 11 may include a striking device 13 that generates a shock pulse in the tool, and a rotating device 15 that rotates the tool 14 about the longitudinal axis. The rock drilling rig may include a plurality of excavating booms 8a as described above. As an example, a state is shown in which the second boom 8b is provided with a bolt driving device 16 for supporting the excavated rock by inserting a lock bolt into a previously excavated hole. In the embodiment of FIG. 1, a measuring device 17 capable of measuring a hole excavated in the third boom 8c is provided. Another excavation apparatus 2 includes, for example, an injector for feeding a sealing material into the rock, an apparatus for loading with a small amount of explosive, an apparatus for supplying explosive, and the like.

  FIG. 1 schematically shows the power supply network 18, and the power supply network may be constructed in a fixed manner or may be composed of a changeable power supply network. The power supply network 18 is generally a three-phase AC network. When the rock rig is at the work site, the rig mining equipment, hydraulic system, and required auxiliary systems are powered primarily by electrical energy available from an external power network. The rock rig 1 can be connected to the power supply network 18 using one or more connection cables 19. The connection cable 19 is disposed on the reel 20, and the reel may be provided with a connector 21 suitable for the application, and the connector may be connected to the power connector of the power supply network 18. Alternatively, the reel 20 and the cable may be fixedly arranged in relation to the power supply network 18, and the connection cable 19 is connected to the rock drilling rig 1. The rock drilling rig 1 further includes a connection device 22, and power supplied from the power supply network 18 is transmitted to another work device of the rock drilling rig 1 through the connection device. The configuration and operation of the connection device 22 will be described in detail with reference to FIG.

  First, the connection device 22 includes a circuit breaker 23 that connects the rock drilling rig 1 to the power supply network 18 and disconnects the rock drilling rig 1 from the power supply network 18. The connection device 22 includes switches 24 a and 24 b that select which side of the transformer 25 is connected to the power supply network 18. The switches 24a and 24b are arranged such that when one of the switches 24a and 24b is closed, the other opens accordingly. Switches 24a and 24b may be controlled manually. Further, the switches 24a and 24b may be automatic, in which case each switch is automatically controlled based on the measured value of the supply voltage.

In FIG. 2, reference numerals 26a to 26e and 27 denote various electric working apparatuses for the rock drilling rig. For example, the reference numerals 26a and 26c may indicate the supply of electricity to the mining work apparatus 2, that is, the reference numerals 26a and 26c represent the power supply apparatus of the rock rig 1 that receives power from the electric motor. Reference numeral 26b represents an electric motor of a squeeze pump of the rock drilling rig 1. Reference numeral 26d also represents a water pump for the rock drilling rig 1. Reference numeral 26e represents, for example, a socket, and the socket is used when an auxiliary function such as an immersion pump is connected to the rock rig 1. Furthermore, reference numeral 27 represents a low voltage auxiliary function of the rock drilling rig, for example a light source or a power supply system required for the control device, which is supplied via a control transformer 28. Usually, the control transformer transforms the voltage of the auxiliary function to 24 volts, for example. Thus, the electric working device of the rock drill rig that receives electric power through the connecting device 22 is, for example, the device 2 for mining work of the rock drill rig, its driving device 4, a squeeze pump, pumps, and other auxiliary devices, As well as other similar motorized devices.

  Regarding the voltage levels of the above devices, the electric working device of the rock drilling rig 1 is classified into two kinds of voltage levels, and these levels are indicated by U1 and U2 in FIG. The transformer 25 is also for transforming from the voltage level U1 to the voltage level U2 or vice versa. The states of the switches 24a and 24b are also switched according to the voltage level of the power supply network 18. When the voltage level of the power supply network 18 is U1, the switch 24a is closed and the switch 24b is opened. In such a case, the electric working device with the voltage level U1 is directly supplied with electric power from the power supply network, whereas the electric working device with the voltage level U2 receives electric power from the transformer 25, and the transformer The voltage level U1 of the network is transformed to the voltage level U2.

  Similarly, when the voltage level of the power supply network 18 is U2, the switch 24b is closed and the switch 24a is opened. In such a case, the electric working device with a voltage level of U2 is supplied with power directly from the power supply network, the electric working device with a voltage level of U1 receives power from the transformer 25, and the transformer is the voltage level of the power supply network. Transform U2 to voltage level U1.

  Accordingly, in both cases, only a few of the electric working devices are supplied with power from the transformer 25. That is, the criterion for determining the scale of the transformer 25 is to make it smaller than the total power of the rock drilling rig. The power of the mining equipment 2, that is, the power supply of the rock drilling rig is about 30 to 100 kW. The power of the squeeze pump is also about 5 to 15 kW, for example. The power of other auxiliary devices is generally about 2 to 3 kilowatts. Therefore, the total power consumption of rock drilling rig is about 250kW. When using such a rock drilling rig at two different voltage levels, the prior art approach would require a 300 kVA transformer. However, in this system, only a few electric working devices need power supply from the transformer, and in this case, the scale of the transformer may be 160 kVA, for example. Thus, the weight, and especially the capacity, of the transformer remains fairly low, so it makes sense to arrange this transformer in relation to the rock drilling rig both structurally and economically.

  Further, it is desirable to divide the voltage level of the electric working device evenly as much as possible, so that the scale of the transformer 25 can be set to about half of the total power of the rock drilling rig. Preferably, the electric work equipment has two voltage levels so that the total electric power of the electric work equipment with high total power does not exceed 75% of the total power of the rock drilling rig, preferably no more than 60%. Divide into

  The basic principle is to divide each power supply of the rock drilling rig into different voltage levels, since the total power of the rock drilling rig is generally the highest. Other electrical devices are also divided into different voltage levels so that power distribution is as uniform as possible. When the number of power supply devices provided in the rock drilling rig is an odd number, one voltage level includes only the power supply device, and the other electric work device is included in the other voltage level. For example, if a rock drilling rig has three power supplies, the first voltage level includes two power supplies, and the second voltage level includes one power supply and all the remaining motorized devices. A work device may be included. If the rock rig has only one power supply, this device is included in the first voltage level and all remaining motorized work devices are included in the second voltage level.

  As an example of the voltage level used, the first voltage level may be 1000V and the second voltage level may be 690V. As another example, the first voltage level may be 1000V and the second voltage level may be 400V. Also, the transformer 25 is provided with two different levels on one side and can be taken out using, for example, an intermediate tap. In such a case, the voltage level on the first side of the transformer may be 1000V and the voltage level on the other side of the transformer may be, for example, 690V and 400V, the latter taking from the middle tap.

  In some cases, the features disclosed in this application may be used by themselves regardless of other features. On the contrary, various combinations may be realized by combining the features disclosed in the present application as necessary.

  The drawings and the associated description merely illustrate the idea of the invention. The details of the invention may be varied within the scope of the claims.

Further, instead of the transformer, any other device capable of transforming the voltage level from high voltage to low voltage and transforming from low voltage to high voltage in another use situation may be used as the transformation means. Such a method may be realized by using, for example, two inverters, and accordingly, a rectifier, an intermediate circuit, and an inverse converter that can select the voltage level as described above may be included.

Claims (3)

Electric work device, and the rock drilling equipment provided with connection means to the power supply network,該削rock equipment is transformed to a lower voltage from a higher voltage in accordance with voltage level required or a low voltage, the high voltage includes a transformer hand stage,該削rock equipment is provided with the magnitude of the voltage levels different electric work apparatus,該削rock equipment, the power supply network directly from the number of the electric work apparatus performed feeding, also to some of the electric work device comprises a connection means for supplying power via the transformer hand stage, by the connecting means, the voltage working device receiving supply of the power supply network directly from power Rock drilling equipment that can be selected based on level. In rock drilling equipment according to claim 1, the rock drilling rig, characterized in that said transformer means is a transformer. In rock drilling equipment according to claim 2, wherein the transformer rock drilling rig, characterized in that it is configured to transform the first voltage level in at least two different voltage levels.

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