Generator-equipped heavy machinery system

Abstract

To provide a generator-mounted heavy machinery system that integrates a generator and heavy machinery. [Solution] The generator-equipped heavy equipment system 1 includes a hydraulic pump unit for boosting hydraulic oil, a heavy equipment 2 for performing a specified task using the hydraulic oil, a generator unit 4 provided in the heavy equipment 2 for generating electricity using the hydraulic oil when the specified task is stopped, and a switching circuit provided in the heavy equipment 2 for switching from a main circulation path for the hydraulic oil when the specified task is in operation to a sub-circulation path for circulating hydraulic oil from the hydraulic pump unit to the generator unit 4 when the specified task is stopped.

Description

[Technical field]

[0001] The present invention relates to a generator-mounted heavy machinery system. [Background technology]

[0002] 2. Description of the Related Art Conventionally, various heavy machinery has been used at construction sites. Among the various heavy machinery, for example, there is a heavy machinery for driving piles into the ground to reinforce the ground.

[0003] As an example of technology related to the present invention, Patent Document 1 discloses a heavy machinery system for use in construction, which has a first running section that runs near both sides of the width of a linear construction site, a platform that moves across the construction site, and a construction section that is fixed on the platform and moves together with the platform to carry out specified construction work at the construction site.

[0004] Patent Document 2 discloses a portable heavy machinery unit comprising an installation stand that is equipped with heavy machinery and can be placed on the bed of a vehicle, jack devices provided at the four corners of the installation stand to move the installation stand up and down relative to the ground, and support legs that are separate from the jack devices and are detachably provided at the four corners of the installation stand to support the installation stand, and the jack devices are positioned outside the support legs in the fore-and-aft direction of the installation stand at the four corners of the installation stand. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2022-36792 A [Patent Document 2] JP 2017-154847 A Summary of the Invention [Problem to be solved by the invention]

[0006] In some cases, piles must be driven deep into the ground to strengthen it, and in such cases, multiple piles are welded together to increase their length. Electricity is required to operate the welding machine that welds the piles together. Therefore, it is desirable to integrate the generator with the heavy machinery.

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a generator-mounted heavy machinery system in which a generator and heavy machinery are integrated together. [Means for solving the problem]

[0008] The generator-equipped heavy machinery system of the present invention is characterized in that it comprises a heavy machinery having a hydraulic pump unit for pressurizing hydraulic oil and for performing a specified task using the hydraulic oil, a generator unit provided in the heavy machinery and generating electricity using the hydraulic oil while the specified task is stopped, and a switching circuit provided in the heavy machinery and switching from a main circulation path of the hydraulic oil while the specified task is being performed to a sub-circulation path for circulating the hydraulic oil from the hydraulic pump unit to the generator unit when the specified task is stopped.

[0009] In addition, in the generator-equipped heavy equipment system of the present invention, it is preferable that the heavy equipment is a machine for driving multiple piles to reinforce the ground, and the generator unit has a power supply path that supplies power to a welding machine for connecting the multiple piles to each other.

[0010] In addition, in the generator-equipped heavy machinery system of the present invention, it is preferable that the hydraulic pump section is composed of a plurality of hydraulic pumps, and the sub-distribution path is a path through which the hydraulic oil is supplied from a stopped hydraulic pump among the plurality of hydraulic pumps to the generator section when the specified work is stopped. Effect of the Invention

[0011] According to this invention, the generator and the heavy machinery can be integrated. [Brief description of the drawings]

[0012] [Figure 1] 1 is a diagram showing a generator-equipped heavy machinery system according to an embodiment of the present invention; [Diagram 2] 1 is a plan view of a generator-equipped heavy machinery system according to an embodiment of the present invention. [Diagram 3] 1 is a diagram showing a switching circuit for switching between a main circulation path and a sub circulation path in a generator-equipped heavy machinery system according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following, the same elements in all the drawings will be given the same reference numerals, and duplicated explanations will be omitted. In addition, in the description in the text, the reference numerals previously described will be used as necessary.

[0014] Fig. 1 is a diagram showing a generator-mounted heavy machinery system 1 according to an embodiment of the present invention, Fig. 2 is a plan view of the generator-mounted heavy machinery system 1 according to an embodiment of the present invention.

[0015] FIG. 3 is a diagram showing the switching circuit 6 that switches between the main distribution path 7a and the sub-distribution path 7b in the generator-mounted heavy machinery system 1 according to the embodiment of the present invention.

[0016] The generator-mounted heavy machinery system 1 includes a heavy machinery 2, a generator unit 4, and a switching circuit 6. The generator-mounted heavy machinery system 1 has a function of driving a plurality of piles to reinforce the ground, while supplying power to a welding machine 8 that connects the plurality of piles to each other. Here, the heavy machinery 2 is described as a pile driver for strengthening the ground, but of course the system can be applied to other heavy machinery.

[0017] The heavy equipment 2 is a pile driver equipped with a base machine 14 consisting of a lower running body 12 equipped with left and right crawlers and an upper rotating body 13 rotatably mounted on the lower running body 12, a leader 15 that can stand up on the front of the upper rotating body 13, and a raising and lowering cylinder 16 that supports the leader 15.

[0018] The heavy equipment 2 has a function of driving multiple piles into the ground to reinforce the ground. The multiple piles are connected in the longitudinal direction, and the connecting parts of the multiple piles are welded to realize a long pile. The welding of the connecting parts of the piles is performed by a welding machine 8.

[0019] A leader support that supports the leader 15 so that it can be raised and lowered is provided at the front of the upper rotating body 13, and a pipe support member that supports pipes is provided above the front of the upper rotating body 13.

[0020] A cab 19 is mounted on the right side of the upper rotating body 13, and a hydraulic drive unit 22 serving as a power source for the heavy equipment 2 is mounted on the left side. Furthermore, jacks 21 are provided at four locations on the front, rear, left and right sides of the upper rotating body 13 to be in contact with the ground and to stabilize the base machine 14.

[0021] The heavy equipment 2 is equipped with a hydraulic drive system 22. The hydraulic drive system 22 includes a hydraulic pump section 5 having hydraulic pumps P1, P2, P4, and P5, various hydraulic actuators such as a hydraulic motor 32 and hydraulic cylinders that are operated by pressure oil (hydraulic oil) discharged from the hydraulic pumps P1, P2, P4, and P5, and various hydraulic devices such as valves and sensors that are incorporated in hydraulic circuits between the hydraulic pumps and the hydraulic actuators.

[0022] The hydraulic pumps P1, P2, P4, and P5 constituting the hydraulic pump section 5 have the function of boosting hydraulic oil, and are made up of a total of four hydraulic pumps: two main hydraulic pumps P1 and P2, and two sub hydraulic pumps P4 and P5 with smaller capacities than the main hydraulic pumps P1 and P2. Here, the pump capacity is the discharge flow rate per one rotation of the pump.

[0023] The generator section 4 includes a generator 4a installed on the ceiling side of the upper revolving body 13, and a power supply path 4b that connects the generator 4a and the welding machine 8 to supply electric power to the welding machine 8.

[0024] The generator 4a has a function of converting hydraulic power supplied from the hydraulic pump unit 5 into electrical energy. When the heavy equipment 2 is stopped performing a predetermined operation (pile driving operation), the generator 4a generates electricity using hydraulic oil discharged from the hydraulic pump unit 5. The generator 4a is controlled by a control circuit (not shown).

[0025] Here, a main flow path 7a is provided for supplying the pressurized oil discharged from each hydraulic pump P1, P2, P4, P5 to various hydraulic equipment such as a hydraulic motor 32 required for the heavy equipment 2 to function as a pile driver.

[0026] The switching circuit 6 is provided in the heavy equipment 2 and has a function of switching from a main flow path 7a of hydraulic oil during pile driving work to a sub-flow path 7b for flowing hydraulic oil from the hydraulic pump unit 5 to the generator unit 4 when the pile driving work is stopped. The switching of the switching circuit 6 will be described as being performed automatically by a control circuit (not shown), but it may also be performed manually.

[0027] Here, the hydraulic pump P1 out of the hydraulic pumps P1, P2, P4, and P5 is described as being connected to the switching circuit 6, but it goes without saying that the hydraulic pumps P2, P4, and P5 may be connected to each other.

[0028] The sub-circulation path 7b is a path through which hydraulic oil is supplied from a stopped hydraulic pump among the hydraulic pumps P1, P2, P4, and P5 when the pile driving operation is stopped to the generator unit 4. The sub-circulation path 7b is a path that connects the switching circuit 6 and the generator 4a.

[0029] Next, a description will be given of the operation of the above-configured generator-mounted heavy machinery system 1. Conventionally, at a construction site using heavy machinery 2 such as a pile driver, piles are driven in to reinforce the ground.

[0030] At some construction sites, in order to secure the length of the piles, multiple piles are connected longitudinally to extend their length. In such cases, it is necessary to weld the joints of the piles with a welding machine 8. To operate the welding machine 8, electricity is required.

[0031] Therefore, it is possible to mount the power generation device on the heavy equipment 2, but as shown in Fig. 1, in order to run the heavy equipment 2 on a road, the leader 15 must be laid down. Generally, power generation devices are very large in size, so they cannot be installed in a laid-down state with the leader 15 laid down. The generator-mounted heavy equipment system 1 according to the present invention is a remarkable solution to such problems.

[0032] When the heavy equipment 2 is operating as a pile driver, the switching function of the switching circuit 6 causes the hydraulic oil discharged from the hydraulic pump P1 to be supplied via the main distribution path 7a to devices etc. required for the heavy equipment 2 to perform pile driving work.

[0033] When the heavy equipment 2 is stopped as a pile driver, the connecting members of multiple piles are being welded by the welding machine 8, so the hydraulic oil discharged from the hydraulic pump P1 is supplied to the generator 4a via the sub-distribution path 7b by the switching function of the switching circuit 6. As a result, the electricity generated by the generator 4a is supplied to the welding machine 8 via the power supply path 4b.

[0034] In this way, according to the generator-mounted heavy machinery system 1, since the hydraulic pump unit 5 mounted on the heavy machinery 2 supplies oil to the generator 4a by utilizing the period when the hydraulic pump unit 5 is normally stopped, there is no need to provide a special supply source of pressurized oil, so the generator unit 4 can be made compact, and as shown in Fig. 1, there is an advantage that it can be mounted on the heavy machinery 2 so as not to get in the way of the leader 15. This has the remarkable effect of improving the work efficiency of pile driving work and welding work for strengthening the ground. [Explanation of symbols]

[0035] 1 Generator-equipped heavy equipment system, 2 Heavy equipment, 4 Generator section, 4a Generator, 4b Power supply path, 5 Hydraulic pump section, 6 Switching circuit, 7a Main distribution path, 7b Sub-distribution path, 8 Welding machine, 12 Lower running body, 13 Upper rotating body, 14 Base machine, 15 Leader, 16 Drilling cylinder, 19 Operator's cab, 21 Jack, 22 Hydraulic drive unit, 32 Hydraulic motor, P1, P2, P4, P5 Hydraulic pump.

Claims

[Claim 1] A heavy machine having a hydraulic pump unit for pressurizing hydraulic oil and for performing pile driving work using the hydraulic oil; A generator unit provided in the heavy equipment and generating electricity using the hydraulic oil while the pile driving work is stopped; A switching circuit is provided in the heavy equipment and switches from a main flow path of the hydraulic oil during the pile driving operation to a sub-flow path for flowing the hydraulic oil from the hydraulic pump unit to the generator unit when the pile driving operation is stopped; Equipped with The heavy machinery is a machine for driving a plurality of piles to reinforce the ground, the generator unit has a power supply path for supplying power to a welding machine for connecting the plurality of piles to each other, The hydraulic pump unit is a shared pump capable of supplying hydraulic fluid to both the main circulation path and the sub circulation path, A generator-equipped heavy machinery system, characterized in that the generator unit is a compact device that does not have a hydraulic pump device so that it can be mounted on the heavy machinery.

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