JP3970132B2 - Water supply equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water supply device, and more particularly to a cabinet-type water supply device that supplies water to a building such as a general building or an apartment using two vertical pump devices.
[0002]
[Prior art]
In buildings such as ordinary buildings and condominiums, from the viewpoint of effective use of land, a pump room is rarely provided, so that it can be used outdoors and space-saving requirements are met. It is widely practiced to install tap water that has been pressurized to a predetermined pressure by this water supply device to each household. As this type of water supply device, there are two vertical pump devices, various pipes connected to the suction side and the discharge side of the pump device, sensors such as a pressure sensor for detecting the pressure in the pipe, and pressure It is generally known that a tank or the like is provided and these various devices are integrally accommodated in a cabinet. In this type of cabinet-type water supply apparatus, since it is often installed at a distance close to the residents' residence, low noise is regarded as important.
[0003]
Therefore, noise is generated by the sound (vibration) generated inside the cabinet being transmitted to the cabinet by air propagation and vibrating the cabinet. Therefore, as a noise reduction measure for a cabinet-type water supply device, the inner surface of the cabinet has been conventionally used. It has been widely practiced to attach a sound-absorbing material or a damping material that suppresses vibrations, to increase the mass by increasing the thickness of the cabinet itself, and to make the cabinet difficult to vibrate.
[0004]
[Problems to be solved by the invention]
However, increasing the thickness of the cabinet itself to reduce the noise of the water supply system not only increases the weight, but it becomes an obstacle during transportation and installation, as well as increasing the amount of material used and increasing costs. In addition, the cabinet lid becomes heavy, and the workability when performing maintenance by attaching and detaching the cabinet lid is deteriorated.
[0005]
The present invention has been made in view of the above-described circumstances, and provides a water supply device that can reduce the noise and reduce the weight of the cabinet without increasing the thickness of the cabinet itself. Objective.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is a water supply apparatus in which various devices such as a pump device and piping are integrally stored in a cabinet having a cabinet body and a cabinet lid, and the pump device is provided at one corner of the cabinet. together is positioned, in the front plate and the rear surface plate of the cabinet body of the cabinet lid, a motor unit facing position sandwiching the front and back the motor unit to face the motor unit of the said pump device housed in the cabinet, the motor parts is a water supply device, wherein the setting digit partial thick part approximately point the two positions symmetrical positions facing position and around the center of the front plate and the rear face plate.
The front panel of the cabinet lid and the rear panel of the cabinet body, which are formed by bending a plate with a uniform thickness, are generally quite large in area. Thus, the noise can be reduced without increasing the thickness of the cabinet itself and thus reducing the weight of the cabinet.
[0007]
Site In the water supply apparatus, the most intense vibration generated by the motor of the pump device, therefore, in general, since a position facing the said motor of the cabinet are most vibrations, facing the motor section of the cabinet By suppressing the vibration of the cabinet here with the thick wall portion, noise can be reduced more efficiently.
[0008]
Motor unit facing position in order to position the corner Generally, by providing the thick portion at a position along the diagonal in this structure, uniform plate rear face plate of the front plate and the cabinet body of the cabinet lid The thick portion can be prevented from spreading over a wide range, and noise can be further reduced.
[0009]
According to a second aspect of the invention, the water supply of said thick portion, according to claim 1, characterized in that formed by pasting a different plate member on the front plate and the rear plate of the cabinet body of the cabinet lid Device.
Thereby, a partial thick part can be easily and promptly formed at an arbitrary position by a relatively simple operation of attaching another member to the cabinet.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG.1 and FIG.2 shows the external view of the water supply apparatus of embodiment of this invention. This water supply apparatus includes a cabinet main body 12 having a rectangular box shape that opens forward, and a cabinet lid 14 that detachably closes the opening of the cabinet main body 12. 10 and an inspection window 16 is provided at a predetermined position of the cabinet lid 14.
[0011]
3 and 4 show the internal structure of the cabinet 10. Inside the cabinet 10, two vertical pump devices 18 are arranged in parallel along the vertical direction at the front of each device. Each of the vertical pump devices 18 is, for example, a booster pump having a pump unit 20 and a motor unit 22.
[0012]
On the suction side of the vertical pump device 18, a suction header 24 that extends in the horizontal direction and incorporates a ball valve (not shown) is disposed at a connection portion with each vertical pump device 18, and the vertical pump device 18. The decompression type backflow preventer 30 is disposed between the suction header 24 and the suction pipe 28 including the ball valve 26 with a strainer. A pressure sensor 32 that detects the pressure on the suction side is attached to the suction pipe 28. As a result, the main water pipe is connected to the strainer portion of the ball valve 26 with strainer, and the vertical pump device 18 is operated with the ball valve 26 open, so that the tap water is drawn into the suction pipe 28 and the decompression type backflow preventer. 30 and the suction header 24 are sucked into each vertical pump device 18.
[0013]
On the other hand, a discharge elbow pipe 34 is connected to the discharge side of each vertical pump device 18, and a discharge side check valve 36 for preventing the backflow of discharged water is connected to the discharge elbow pipe 34. Connected to the side check valve 36 is a discharge collecting pipe 40 that has a flow switch 38 that detects a small amount of water and sends a signal to collect (merge) the water discharged from the vertical pump device 18. The discharge collecting pipe 40 is connected to the upper end of a bypass header 44 having a pressure sensor 42 for detecting the pressure on the discharge side, and the pressure extending from the pressure tank 46 at a predetermined position along the length direction of the bypass header 44. A tank pipe 48 is connected. Further, the lower end of the bypass header 44 is connected to a discharge pipe 52 having a ball valve 50, and the discharge pipe 52 has a check valve built in and communicated with the suction header 24.
[0014]
Thereby, the water discharged from the vertical pump device 18 along with the operation of the vertical pump device 18 passes through the discharge elbow pipe 34, the discharge side check valve 36, the discharge collecting pipe 40, and the bypass header 44. It is discharged from the discharge pipe 52 to the outside. When the water pressure in the suction header 24 is sufficiently high, the water in the suction header 24 is directly discharged from the discharge pipe 52 and the check valve built in the flange mating surface of the suction header 24. Is discharged to the outside. The pressure tank 46 accumulates pressurized water discharged from the vertical pump device 18 to prevent frequent start and stop of the vertical pump device 18 and to keep the feed water pressure smoothly and constant.
[0015]
At an upper position of the vertical pump device 18, an inverter case 56 in which an inverter device (not shown) is placed and housed is disposed so as to be openable and closable forward via a hinge 58. The inverter device is for driving each motor unit 22 at a variable speed by supplying AC power to each motor unit 22 of each vertical pump device 18 by changing the frequency and voltage.
[0016]
Control which performs the control etc. which operate | move the vertical pump apparatus 18 at variable speed so that the water supply water pressure in a terminal consumer may become predetermined | prescribed pressure in response to signals from the pressure sensors 32, 42, etc. A board 60 is provided.
[0017]
In this example, the vertical pump device 18 is arranged on the front side of each device in order to facilitate the installation and removal of the vertical pump device 18 and facilitate maintenance. That is, in the conventional cabinet-type water supply apparatus, a general-purpose pump having a rotational speed of about 3000 rpm (50 Hz) or 3600 rpm (60 Hz) is generally used as the pump. In such a rotational speed pump, since the diameter of the impeller is large, the diameter of the pump casing that houses the impeller becomes larger than the mounting pitch of the discharge flange of the pump, and the pump is directed with the discharge flange facing forward. If the flange portion of the discharge side pipe is not connected to the discharge flange, the pump cannot be removed during maintenance. For this reason, various piping was given to the front side of the pump. However, when various pipes are arranged on the front side of the pump as described above, when the pump is removed at the time of replacement of the mechanical seal or the like, it is necessary to first remove the pipe, and it takes a considerable time to remove the pump.
[0018]
Therefore, in this example, as the vertical pump device 18, a dedicated pump whose rotational speed is significantly increased to, for example, about 7200 rpm is used, whereby the impeller and the pump casing that accommodates the impeller are used. The diameter is set smaller than the pipe mounting pitch of the discharge flange of the vertical pump device 18, and the vertical pump device 18 can be disposed on the front side of each device.
[0019]
FIG. 5 shows the cabinet 10, and the cabinet lid 14 of the cabinet 10 is formed into a flat plate having a thickness of 1 mm, for example, and has a rectangular front plate 70. The cabinet body 12 is formed by, for example, pressing a plate body having a plate thickness of 2 mm and has a rectangular rear plate 72. In addition, when various devices are accommodated in a predetermined place on the inner surface side of the front plate 70 of the cabinet lid 14, in this example, the cabinet 10, a position facing the motor unit 22 of the vertical pump device 18, and this position In addition, for example, rectangular anti-vibration plates 74a and 74b having a plate thickness of 1.6 mm are attached to two locations that are substantially point-symmetric with respect to the center of the front plate 70 and the thick portions 76a and 76b are formed. Is formed. Similarly, a predetermined position on the inner surface side of the rear plate 72 of the cabinet body 12, in this example, when various devices are stored in the cabinet 10, a position facing the motor unit 22 of the vertical pump device 18, and this position In addition, rectangular vibration preventing plates 78a and 78b having a plate thickness of 1.6 mm, for example, are attached to two locations that are substantially point-symmetric with respect to the center of the rear plate 72, and the thick portions 80a and 80b are formed. Is formed.
[0020]
As described above, in general, the thick plate portions 76a and 76b are partially provided on the front plate 70 of the cabinet lid 14 having a considerably large area, and the thick plate portions 80a and 80b are also partially provided on the rear plate 72 of the cabinet body 12, respectively. By providing this, it is possible to suppress considerable vibrations, thereby reducing the noise while reducing the weight of the cabinet 10 without increasing the thickness of the cabinet lid 14 and the cabinet body 12 itself. it can.
[0021]
In particular, in the water supply device, the most intense vibration is generated in the motor unit 22 of the pump device 18, and, therefore, normally, the portion of the cabinet 10 facing the motor unit 22 is most vibrated. The thick portion 76a is located at the motor portion facing position of the front panel 70 of the cabinet lid 14 facing the motor portion 22, and the thick portion is similarly positioned at the motor portion facing position of the rear plate 72 of the cabinet body 12 facing the motor portion 22. Noise can be more efficiently reduced by providing 80a and suppressing vibration of the front plate 70 of the cabinet lid 14 and the rear plate 72 of the cabinet body 12 here.
[0022]
Further, the thick wall portion 76b is also provided at a position substantially symmetrical with respect to the position of the front plate 70 of the cabinet lid 14 facing the motor portion and the center of the front plate 70. Similarly, the motor portion of the rear plate 72 of the cabinet body 12 is also provided. Thick portions 80b are also provided at positions that are substantially point-symmetric with respect to the opposite position and the center of the rear plate 72, so that the front plate 70 of the cabinet lid 14 and the rear plate 72 of the cabinet body 12 have a uniform thickness. Can be prevented from spreading over a wide range, and noise can be further reduced.
[0023]
Further, the vibration preventing plates 74a and 74b are attached to the front plate 70 of the cabinet lid 14, and the thick portions 76a and 76b are attached. The vibration preventing plates 78a and 78b are attached to the rear plate 72 of the cabinet body 12, and the thick portion 80a. , 80b respectively, it is possible to easily and quickly form a partial thick portion at an arbitrary position by a relatively simple operation.
[0024]
In FIG. 6, the result of having investigated the noise spectrum of the water supply apparatus which has the cabinet 10 comprised as mentioned above is shown as a graph (A). For comparison, in the same figure, the noise spectrum when a flat plate having a thickness of 3.2 mm is formed to form a cabinet is shown in graph (B), and the flat plate having a thickness of 2.0 mm is formed. The noise spectrum when comprising is shown as a graph (C). From this figure, it can be seen that, according to this example, there is almost the same noise prevention effect as when the cabinet is constituted by a flat plate with an increased thickness.
[0025]
【The invention's effect】
As described above, according to the present invention, it is possible to suppress considerable vibration by providing a thick portion partly on the front plate of the cabinet lid and the rear plate of the cabinet body, which generally have a considerably large area, As a result, the noise can be reduced without increasing the thickness of the cabinet itself, and thus reducing the weight of the cabinet. As a result, the cost can be reduced, and the cabinet lid can be easily attached and detached during maintenance.
[Brief description of the drawings]
FIG. 1 is a front view of a water supply apparatus according to an embodiment of the present invention.
FIG. 2 is also a side view of FIG. 1;
FIG. 3 is a front view of the inside of the cabinet.
FIG. 4 is a side view of the inside of the cabinet.
FIG. 5 is an exploded perspective view showing the cabinet.
FIG. 6 is a graph showing a noise spectrum in the water supply device according to the embodiment of the present invention and the conventional water supply device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Cabinet 12 Cabinet main body 14 Cabinet lid 18 Pump apparatus 20 Pump part 22 Motor part 24 Suction header 28 Suction pipe 30 Depressurization type backflow preventer 34 Discharge elbow pipe 36 Discharge side check valve 38 Flow switch 40 Discharge collecting pipe 44 Bypass header 46 Pressure tank 48 Pressure tank piping 52 Discharge pipe 56 Inverter case 70 Front plate 72 Rear plates 74a and 74b Vibration prevention plates 76a and 76b Thick portions 78a and 78b Vibration prevention plates 80a and 80b Thick portions

Claims (2)

In a water supply device that integrally stores various devices such as pump devices and piping inside a cabinet having a cabinet body and a cabinet lid,
While positioning the pump device at one corner of the cabinet,
On the front plate of the cabinet lid and the rear plate of the cabinet main body, the motor unit facing position that sandwiches the motor unit from the front and back facing the motor unit of the pump device housed in the cabinet , and the motor unit facing position 2. A water supply apparatus according to claim 1, wherein partial thick portions are provided at two positions substantially symmetrical with respect to the center of the front plate and the rear plate. It said thick portion, the water supply apparatus according to claim 1, wherein the forming paste another plate member on the front plate and the rear plate of the cabinet body of the cabinet lid.

Images