JP2023093798A - Power supply device and attachment method of the same - Google Patents

Abstract

To provide a power supply device which achieves good attachability and maintainability, and to provide an attachment method of the power supply device.SOLUTION: A power supply device 30 includes: a back surface metal fitting 40; arm metal fittings 48, 49 fixed to the back surface metal fitting 40 and extending forward; and two device housings 31, 31 which house a converter part and are fixed to the arm metal fittings 48, 49. The two device housings 31, 31 are disposed to face each other in a horizontal direction so as to sandwich the arm metal fittings 48, 49 and fixed to the arm metal fitting 48 from above.SELECTED DRAWING: Figure 6

Description

One aspect of the present invention relates to a power supply device and a mounting method thereof.

Patent Literature 1 discloses a power supply cabinet installed outdoors.

Patent No. 6562146

A mobile phone base station uses a DC power supply that supplies DC power rectified from AC input power to a wireless device as a load. When such a base station is to be installed outdoors and at a high place such as on a utility pole or on the roof of a building, it is required that the direct-current power supply is easy to install. In the fifth generation mobile communication system (so-called “5G”), many base stations are expected to be installed at high places.

For example, two converters (power supply units) are used in the DC power supply so that parallel redundant operation can be performed. Normally, the two power supply devices share power supply to the load, and when one of them fails, the other takes charge of power supply to the load. A failed power supply is replaced by a worker.

One aspect of the present invention provides a power supply device that is easy to install and easy to maintain, and a method for installing the same.

A power supply device according to an aspect of the present invention includes a back metal fitting, an arm metal fitting fixed to the back metal fitting and extending forward, and two device housings each containing a converter unit and fixed to the arm metal fitting. , provided. The two device housings are arranged facing each other in the horizontal direction so as to sandwich the arm fittings and are fixed to the arm fittings from above.

According to the above aspect, it is possible to provide a power supply device that is easy to install and easy to maintain.

1 is a front perspective view of a DC power supply; FIG. It is a perspective view showing two device housings, an arm metal fitting, and a back metal fitting. It is a perspective view which shows the attachment surface of one apparatus housing|casing. FIG. 4 is a perspective view showing how a first device housing is attached to an arm metal fitting; FIG. 3 is a perspective view showing a first device housing fixed to an arm metal fitting; FIG. 5 is a perspective view showing how a second device housing is attached to an arm metal fitting; FIG. 4 is a perspective view showing a state in which two device housings are fixed to an arm metal fitting;

First, the outline of the power supply device and the mounting method thereof according to the embodiment of the present invention will be described.

The power supply device includes a rear metal fitting, an arm metal fitting fixed to the rear metal fitting and extending forward, and two device housings each accommodating a converter section and fixed to the arm metal fitting. The two device housings are arranged facing each other in the horizontal direction so as to sandwich the arm fittings and are fixed to the arm fittings from above.

It is desired that the work of installing the power supply device at a high place such as a utility pole is carried out by a single worker. A power supply device is required to have good mountability so that it can be mounted safely and reliably even by a worker who works in a restricted standing position or movement. A worker attaches the back surface of the power supply device to the metal fitting attached to the utility pole in a standing position facing the utility pole. In that case, it is assumed that the back side of the power supply device is difficult for the worker to see visually and that it is out of reach.

According to the power supply device having the above configuration, two device housings can be fixed to one back metal fitting through the arm metal fitting. These back metal fittings, arm metal fittings, and two device housings may be assembled in an environment where work is easy, such as on the ground. In a high place, two apparatus housings can be attached by performing the work of attaching the back metal fittings to the metal fittings attached to the utility pole once, which is efficient. The two device housings are fixed from above to arm metal fittings extending forward from the back metal fittings. Therefore, when a failure occurs, the operator does not need to access the back side of the power supply device, and can relatively easily remove the device housing from above the arm fitting. The power supply device may output DC power, or may output AC power.

The arm fitting may have a first hooking portion and a second hooking portion that are vertically spaced apart from each other. Each of the device housings has, on a mounting surface facing the other device housing, a first hook disposed on the upper side and hooked on the first hook, and a second hook disposed on the bottom and hooked on the second hook. Two hooks and may have.

According to the above configuration, by hooking the second hook on the second hook on the lower side and hooking the first hook on the first hook on the upper side, the vertical position of the device housing is determined, and You can reduce the chances of your body falling. Therefore, when a failure occurs, the operator can safely perform the task of attaching the replacement device housing to the arm metal fitting extending forward at a high place.

As for the mounting method, the device housing for housing the converter section is mounted on the first and second hooking portions of the arm metal fitting extending forward from the rear metal fitting, which are spaced apart in the vertical direction. The mounting method is such that the second hook arranged at the bottom of the device housing is hooked on the second hook portion, and the first hook arranged at the top of the device housing is hooked to the first hook with play. The device housing is hooked to the hooking portion, the device housing is set in a fixed posture, and the device housing is fixed to the arm metal fitting from above the arm metal fitting.

According to the mounting method described above, the second hook is hooked on the second hook on the lower side, and the first hook is hooked on the first hook on the upper side, thereby reducing the possibility of the device housing falling. In this state, the operator supports the device housing with one hand to bring it into a fixing posture, and easily fixes the device housing to the arm metal fitting from above with the other hand (for example, by screwing). can. At the time of removal, when the worker removes the screws and bolts to release the fixation between the arm bracket and the device housing, the clearance between the arm bracket and the first hook is used to lift the device housing from the fixed position. Can be tilted slightly. Therefore, the device housing can be easily removed, and maintainability is improved.

Hereinafter, embodiments will be described in detail with reference to the drawings. FIG. 1 is a front view of a DC power supply device 100 for mobile phone base stations, and FIG.

As shown in FIG. 1, a DC power supply device 100 includes a first metal fitting 10 and a second metal fitting 20 which are vertically spaced apart and extend horizontally, and rectify AC input power to output DC power. and a storage battery box 50 that outputs DC power in place of the power supply 30 in an emergency. The first metal fitting 10 and the second metal fitting 20 may be attached to a pole such as a utility pole, or may be attached to a radio pedestal. The "horizontal direction" in this specification also includes a direction that is slightly inclined from the perfectly horizontal direction.

The power supply device 30 houses an AC/DC converter section in a device housing 31 . The power supply device 30 receives a commercial AC power supply and supplies DC power to load equipment such as a wireless device. In this embodiment, two power supply units 30, 30 are used so as to enable parallel redundant operation. Normally, the two power supply devices 30, 30 share the power supply to the load, and when one of them fails, the other power supply to the load. Therefore, one power supply device 30 can be replaced without cutting off the power supply to the load. The number of power supply devices 30 is not limited to two.

The storage battery box 50 accommodates an assembled battery in which a plurality of cells are connected in series or in parallel in a housing 51 . In this embodiment, lithium-ion battery cells are used as the cells, and the assembled battery is configured as a battery pack having a battery management system (BMS) that manages the plurality of lithium-ion battery cells.

In this specification, the surface of the power supply device 30 and the storage battery box 50 near the first metal fitting 10 and the second metal fitting 20 (facing surface) is called the rear surface, and the surface opposite to the rear surface is called the front surface. The two power supply devices 30 , 30 have one rear metal fitting 40 arranged on their rear surfaces and spanning the first metal fitting 10 and the second metal fitting 20 .

As shown in FIG. 2 , device housings 31 , 31 of the two power supply devices 30 , 30 are fixed to the rear metal fitting 40 . The rear metal fitting 40 has a first rear hook 41 and a second rear hook 42 that are hooked on the first metal fitting 10 and the second metal fitting 20 shown in FIG. 1, respectively.

The back metal fitting 40 has a back plate 45 extending in the vertical direction, and a top plate 44 provided above the back plate 45 and extending away from the power supply device 30 . A first rear hook 41 is provided at the tip of the top plate 44 . The top plate 44 is provided with through holes through which fixing bolts 46 a pass, and a bolt fixing plate 47 is arranged below the top plate 44 . A second rear hook 42 is provided below the back plate 45 .

Two apparatus housings 31 and 31 are attached to the back plate 45 and are mounted on the substantially L-shaped first and second arm fittings 48 and 49 in a horizontal direction. In this embodiment, the arm fittings 48 and 49 formed separately from the back plate 45 are bolted to the back plate 45, but alternatively, the arm fittings are integrally formed with the back plate 45. good too. Although vertically spaced first and second arm fittings 48, 49 are used in this embodiment, a single arm fitting may alternatively be used.

FIG. 3 shows how the first mounting bracket 35 and the second mounting bracket 36 are fixed to the mounting surface 33 of one device housing 31 . In this embodiment, the mounting surface 33 is a radiator surface (a surface provided with radiation fins), and the opposite side of the mounting surface 33 is a design surface 32 decorated with a logo or the like. A bracket-like first mounting member 35 is fixed to the upper portion of the mounting surface 33 via a screw 37 and insulating bushes 38 and 39 . A bracket-shaped second mounting member 36 is fixed to the lower portion of the mounting surface 33 via a screw 37 and insulating bushes 38 and 39 .

The first mounting bracket 35 includes one or more (two in this embodiment) flanges 35b, 35b projecting in the horizontal direction from the mounting surface 33 of the device housing 31, and provided at the tip of at least one of the flanges 35b. and a first hook 35a. In this embodiment, the first hook 35a has a shape in which the end of the flange 35b is bent, and extends downward from the flange 35b. The flange 35b is provided with a through hole through which a screw described later passes.

The second mounting bracket 36 has one or more (two in this embodiment) second hooks 36 a projecting obliquely downward from the mounting surface 33 of the device housing 31 .

As shown in FIG. 4 , the first arm fitting 48 and the second arm fitting 49 are fixed to the rear fitting 40 with a vertical gap therebetween and extend forward in parallel with the mounting surface 33 of the device housing 31 . The first arm fitting 48 has an upper flange 48a and a lower flange 48b, and the second arm fitting 49 has an upper flange 49a and a lower flange 49b. In this embodiment, these upper flanges 48a, 49a and lower flanges 48b, 49b are provided continuously along the longitudinal direction of the arm fitting, but they may be intermittently provided on the arm fitting.

In this embodiment, the tip of the upper flange 48a of the first arm metal fitting 48, which horizontally protrudes from the mounting surface 33, functions as a first hooking portion on which the first hook 35a is hooked. Although not shown, a hole or notch provided in the side plate connecting the upper flange 48a and the lower flange 48b of the first arm fitting 48 may function as the first hook.

In this embodiment, the slit 49c formed in the connecting portion between the lower flange 49b and the side plate of the second arm metal fitting 49 functions as a second hooking portion on which the second hook 36a is hooked. Although not shown, a hole or notch provided in the side plate of the second arm fitting 49 may function as the second hook.

The method of attaching the device housing 31 to the first arm fitting 48 and the second arm fitting 49 is as follows.
(1) With the device housing 31 slightly tilted, insert the second hook 36a arranged at the bottom of the device housing 31 into the through hole of the side plate of the second arm metal fitting 49, and further the second hook ( It is hooked (inserted) into the slit 49c).
(2) The first hook 35a arranged on the upper part of the device housing 31 is hooked on the first hooking portion (tip of the upper flange 48a) with some play.
(3) The device housing 31 is set to the fixing posture, and the device housing 31 is fixed to the first arm metal fitting 48 from above. In this embodiment, the flange 35b of the first mounting bracket 35, which is arranged on the upper flange 48a of the first arm bracket 48, is fixed to the upper flange 48a by screws 46b.

The width dimension of the lower surface of the flange 35b provided with the first hook 35a is set larger than the width dimension of the upper flange 48a of the first arm metal fitting 48 . Therefore, in the above step (2), the first hook 35a can be hooked on the first hooking portion with play. In this state, the device housing 31 is slightly tilted between a position parallel to the side plate of the first arm fitting 48 and a position slightly inclined around the contact point between the lower second hook 36a and the slit 49c. can be tilted to Next, in the above step (3), for example, the operator supports the apparatus housing 31 with one hand to take it in a fixed posture (a posture parallel to the side plate of the first arm metal fitting 48), and , the flange 35b is screwed to the upper flange 48a of the first arm fitting 48 from above the first arm fitting 48. It should be noted that if the apparatus housing 31 is in a fixed posture or a posture close to it even if the device housing 31 is not supported by one hand, the device housing 31 does not need to be supported by one hand.

In the fixed state of the device housing 31 shown in FIG. is set. As shown in the enlarged perspective view at the bottom right of FIG. 5, the dimensions are set so that the second hook 36a is inserted into the right half of the slit 49c (second hooking portion).

A method of attaching the second device housing 31 to the first arm fitting 48 and the second arm fitting 49 will be described with reference to FIG. A first mounting bracket 35 and a second mounting bracket 36 are attached to the mounting surface of the second device housing in the same manner as in the case of the first device. It is preferable to use the first mounting bracket 35 and the second mounting bracket 36 having the same shape and dimensions as those used for the first unit in order to reduce costs and improve assembling efficiency by using common parts.

The first hook 35a of the first mounting bracket 35 attached to the device housing 31 of the first unit (right side in FIG. 6) is located on the tip side of the first arm bracket 48, and the second hook (left side in FIG. 6) The first hook 35a of the first mounting bracket 35 attached to the device housing 31 faces the side opposite to that of the first device, so it is arranged on the base side of the first arm bracket 48 . Therefore, the second first hook 35a does not interfere with the first first hook 35a.

The first hook 35a of the second device housing 31 is hooked on the corner of the connecting portion between the upper flange 48a of the first arm metal fitting 48 and the side plate with play, and the flange 35b is secured to the upper flange by the screw 46b. 48a.

The second hook 36a of the second mounting bracket 36 attached to the second device housing 31 is hooked on the slit 49c formed in the connecting portion between the lower flange 49b and the side plate of the second arm bracket 49 . Specifically, the second hook 36a of the second device housing 31 is inserted into the remaining left half of the slit 49c.

With the two device housings 31 attached to the arm fittings shown in FIG. 7, each device housing 31 has a design surface on the side opposite to the mounting surface. The appearance is good because the mounting surface, which is a non-designed surface, is not exposed.

Each device housing 31 has a radiator surface as a mounting surface, and is horizontally spaced apart from the radiator surface of the other device housing 31 without contact. Interposition of the first arm fitting 48 and the second arm fitting 49 forms a flow path through which an upward air current can pass between the radiator surfaces of the two device housings 31 , 31 . Therefore, heat dissipation is good.

In the state shown in FIG. 7, if the second power supply from the left fails, the operator first accesses the screw 46b from above and removes the screw 46b with a tool (not shown). Then, the device housing 31 can be tilted around the contact point between the lower second hook 36a and the slit 49c. With the device housing 31 slightly tilted, the operator lifts the device housing 31 upward to pull out the second hook 36a on the lower side from the slit 49c, and then pulls out the device housing 31 upward. can. Similarly, when the storage battery boxes 50 are adjacent to each other as shown in FIG. 1, the device housing 31 second from the left can be pulled out.

The invention is not limited to the embodiments described above.
In the embodiments, a direct-current power supply for a mobile phone base station has been described, but the present invention can be applied to other uses such as a power supply, a storage battery box, and a direct-current power supply to improve the efficiency of installation work. In particular, it is preferable to apply the present invention to applications in which a large number of power supply devices and storage battery boxes are installed in various locations.

In the embodiment, an example has been described in which the arm fitting has a U-shaped cross section having an upper flange, a lower flange, and a side plate connecting them. Alternatively, the arm fitting may have a square cross section having an upper flange, a lower flange, and a pair of side plates connecting them. In this case, a pair of side plates of the second arm metal fitting are appropriately formed with through holes through which the lower hooks 36a are inserted.

In the embodiment, the example in which the flange 35b of the upper mounting bracket 35 is arranged on the upper flange 48a of the first arm bracket 48 has been described. Alternatively, the flange 35b may be placed on the lower flange 48b of the first arm fitting 48. In this case, a through hole is formed in the upper flange 48a of the first arm fitting 48 to allow the tool to be inserted from above.

30 power supply device 31 device housing 40 rear metal fitting 48 first arm metal fitting (arm metal fitting)
49 second arm fitting (arm fitting)

Claims (5)

back bracket,
an arm metal fitting fixed to the back metal fitting and extending forward;
and two device housings each containing a converter unit and fixed to the arm fitting,
A power supply device, wherein the two device housings are arranged facing each other in a horizontal direction so as to sandwich the arm metal fittings and are fixed to the arm metal fittings from above. The arm fitting has a first hook portion and a second hook portion spaced apart in the vertical direction,
Each of the device housings has a mounting surface facing the other device housing,
a first hook disposed on the upper portion and hooked on the first hook;
The power supply device according to claim 1, further comprising: a second hook arranged at a lower portion and hooked on the second hook. The power supply device according to claim 2, wherein each device housing has a design surface on the side opposite to the mounting surface. The power supply device according to claim 2 or 3, wherein the mounting surface of each of the device housings is a radiator surface, and the radiator surface of the other device housing is horizontally separated from the other device housing. A method for attaching a device housing for housing a converter section to a first hook and a second hook provided by an arm metal fitting extending forward from a back metal fitting with a space therebetween in the vertical direction, wherein the device housing is arranged at the bottom of the device housing. hooking the second hook on the second hook,
hooking a first hook arranged at the top of the device housing on the first hooking portion with play;
The mounting method, wherein the device housing is set in a fixing posture and the device housing is fixed to the arm metal fitting from above the arm metal fitting.

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