JP4316058B2 - Water supply equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water supply apparatus that supplies water to a home, for example.
[0002]
[Prior art]
Water supply systems such as apartments and condominiums use a water supply device installed outdoors or indoors to supply water to each household.
[0003]
In such a water supply apparatus, an apparatus having an occupied floor area as small as possible is desired so as not to be restricted by the installation location.
[0004]
Therefore, a water supply device that places importance on a small occupied floor area is detachably assembled with a vertical pump in the main body of the device formed by a case, base, pump cover, etc. that opens in the front direction. It has been practiced to shorten and instead increase the height dimension to reduce the occupied floor space.
[0005]
By the way, from the idea that the water supply device needs a spare pump (in order to replace a failed pump with a healthy pump), it is possible to connect the pipes to these pumps using two pumps arranged in parallel. Has been done.
[0006]
Therefore, in a water supply apparatus using a vertical pump, that is, a pump in which a motor is arranged at the upper part and a pump part driven by the motor is arranged in the lower part, a pump suction port that opens downward is provided at the lower end of the pump part. In addition, a pump part having a pump discharge port that opens upward at the top of the pump part is employed, and a pipe on the suction side is connected to the pump suction port of this pump part. A pipe on the discharge side directed downward through one side of the pump is connected.
[0007]
[Problems to be solved by the invention]
However, with this water supply device, a confluence pipe is arranged among the discharge side pipes above the vertical pump, so the unit that becomes taller due to the adoption of the vertical pump further increases the height dimension, and the water supply device considerably The total height of becomes high. For this reason, the installed water supply apparatus tends to be unstable.
[0008]
The present invention has been made paying attention to the above circumstances, and an object of the present invention is to provide a water supply apparatus that can achieve a low overall height.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a water supply apparatus according to claim 1 is a water supply apparatus configured by detachably assembling a vertical pump in an apparatus body whose front direction is open. The turbine pump unit has a multi-stage turbine pump unit driven by the motor at the lower part and is configured as a unit, and the turbine pump unit has a pump suction port that opens downward at the lower end. And, it is configured to have a pump discharge port that opens in the front direction of the apparatus at the top, a suction pipe is connected to the pump suction port, a discharge pipe that is directed downward is connected to the pump discharge port, The pump is sucked from the lower side of the vertical pump and discharged from the front side of the apparatus. The pump suction port is detachably connected to the suction pipe, and the discharge pipe is connected to the pump suction port. While being divided at a point below the position, divided both are to structure which is detachably connected via an on-off valve.
[0010]
With this water supply device, the discharge pipe of the vertical pump extends slightly toward the front of the water supply device and then moves downward, so that the discharge pipe is not disposed above the vertical pump, and the height dimension is suppressed. .
[0011]
Therefore, the total height of the water supply device can be reduced.
[0012]
In addition to the above purpose, the water supply device according to claim 2 further connects the pump suction port to the suction pipe so that the faulty pump can be easily removed from the place where the pump is installed, and connects the discharge pipe to the pump suction port. It divided | segmented in the point below a connection position, and this both were connected so that attachment or detachment was possible via the on-off valve.
[0013]
As a result, when the vertical pump is taken out from the installed location for maintenance or the like, the on-off valve is first closed, and then the divided end of the divided discharge pipe is removed from the on-off valve.
[0014]
Here, since the divided end of the discharge pipe is below the connection position of the pump suction port located at the lower end of the vertical pump, there is an obstacle that obstructs removal of the pump from the front of the vertical pump to be taken out. There will be no state.
[0015]
Therefore, the vertical pump can be easily taken out by releasing the coupling between the pump suction port and the suction pipe and pulling out the entire vertical pump in the front direction. Of course, the pump may be taken out after the divided discharge pipe alone is taken out first.
[0016]
In addition to the above object, the water supply device according to claim 3 further includes a discharge pipe with a portion continuing from the pump discharge port in the front direction of the water supply device so that air accumulated at the top of the vertical pump portion can be easily discharged. A swing-type valve body that is formed with a horizontal portion extending in a substantially horizontal direction and has a valve seat on the pump discharge port side and that is in contact with and separated from the valve seat in the horizontal portion is swingably stored. The check valve is built in the discharge pipe near the pump discharge port.
[0017]
According to this water supply device, the swing type check valve in the horizontal part near the pump discharge port is a valve with weak closing force that closes due to gravity, so it easily discharges the air mixed in the pump part and accumulated in the top part be able to. In other words, it is excellent in air exhaustability. Thereby, it can prevent beforehand that the sliding part of the mechanical seal in the uppermost part of the pump part is not cooled by water and wears. In addition, a horizontal part is formed in the discharge pipe connected to the pump discharge port as a storage place, a valve seat is formed in the pump discharge port, and a check valve structure that houses a swing type valve body in the horizontal part is compact. It is also structurally simple.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on an embodiment shown in FIGS.
[0019]
1 is a front view of a water supply apparatus to which the present invention is applied, FIG. 2 is a front sectional view of the water supply apparatus, and FIGS. 3 (a), (b) to FIG. 5 are views A to D in FIG. FIG. 6 is a view showing the periphery of the water supply pump, FIG. 7 is a view showing the structure of each part of the water supply device, and reference numeral 1 in FIG.
[0020]
As shown in FIG. 7, the gantry 1 is a self-supporting shape in which at least the front direction is opened, which is a combination of a square back wall 2, a U-shaped skirt plate 7, and a pair of left and right anchor plates 15. It is formed with a wall structure.
[0021]
Specifically, the back wall 2 includes a rectangular back plate 3 extending vertically in the vertical direction, an inward top plate 4 formed on the entire upper edge of the back plate 3, and a back plate continuous with the top plate 4. 3 and an inward side plate 5 formed on the entire left and right edges. The top plate 4 and the side plate 5 at the three-way edges are both protruded by a small amount, for example, about 40 mm in the front direction, and due to the rigidity provided by the top plate 4 and the side plate 5 protruding inward, the back formed by the plate is formed. The wall 3 ensures a mechanical strength that is sufficiently satisfactory for mounting the pump, without causing problems such as stickiness. Further, a band-shaped plate bent in a U-shape protrudes in the front direction from the lower part of both the left and right side plates 5, and a U-shaped skirt plate 7 is formed in the lower portion of the back wall 3. On one wall of the skirt plate 7, for example, the left wall, a through hole 9 for a suction pipe, a drain hole 10, and a cable hole 11 are formed in order from the depth side in order to make piping connection with the outside from the lateral direction. ing. On the right wall of the skirt plate 7, a through hole 12 for a discharge pipe and a drain hole 13 are formed in order from the front (front side) side to make piping connection with the outside from the lateral direction. Further, a band plate is attached from the lower left and right sides of the skirt plate 7 to the lower ends of the side plates 5, and a pair of left and right anchor plates 15 are formed in the lower part of the gantry 1. As a result, the gantry 1 having a narrow depth dimension and a high height dimension, which is self-supporting with the gantry anchor plate 15 facing down and the back plate 3 as the back, is configured. An anchor bolt insertion hole 15a (shown only in FIG. 7) is formed on the plate surface of each anchor plate 15.
[0022]
A water supply pump device 20 is assembled to the inner surface of the back plate 3 that forms the gantry 1. That is, on the upper left side of the back plate 3, a square box-shaped control panel 21 incorporating various control devices such as an inverter is assembled via a bracket 21a. An accumulator 22 is assembled below the control panel 21. On the right side of the back plate 3, a vertical pump unit 23 is assembled adjacent to the control panel 21 and the accumulator 22.
[0023]
Specifically, the pump unit 23 has a motor, for example, a brushless DC motor 24 using a permanent magnet as a rotor (hereinafter simply referred to as a DC motor 24) in an upper part, and a multistage turbine pump unit directly connected to the DC motor 24 in a lower part. A plurality of, for example, two vertical multistage turbine pumps 26 having 25 (hereinafter simply referred to as a pump section) are arranged in parallel in the left-right direction, and a suction-side merging pipe 27 (suction pipe) is provided therewith. The discharge side junction pipe 28 (discharge pipe) is combined. Specifically, a fully closed motor is used as the DC motor 24. In the upper part of the fully closed motor, a cooling fan 29 (as shown in FIG. 2 only) is sucked from the upper suction port 29a and blown out from the lower outlet 29b along the outer peripheral surface of the motor body. ) Is built-in. The multi-stage turbine pump unit 25 includes a suction casing 31 having a pump suction port 30 opening downward in a lower portion and a discharge casing 33 having a pump discharge port 32 opening in a front direction in the upper portion (both shown in FIG. A plurality of intermediate casings 35 containing impellers 34 are fastened to each other, and a structure in which each impeller 34 and a motor shaft 24 a extending from the DC motor 24 are connected is used. The pump suction port 30 is formed at the lower end of the suction casing 31. A suction side merging pipe 27 extending in the left-right direction is detachably connected to each pump suction port 30 of the multi-stage turbine pump 26 via a maintenance on-off valve, for example, a ball valve 36, for example, connected by a flange connection. is there. The suction side merging pipe 27 is closed at the left end with a plug 37 and bent at the right end so as to draw an inverted L shape and extends downward. The pipe portion 27a extending in the lateral direction of the suction side merging pipe 27 is assembled with a freezing prevention heater 38 on both sides. Each pump discharge port 32 of the multistage turbine pump unit 25 is connected to an L-shaped connection pipe 40 (discharge pipe) extending downward (vertical direction) from the discharge port 32 (shown in FIG. 6). The connecting pipe 40 is a pipe member divided from the discharge side joining pipe 28. At the upper end of the connecting pipe 40, an elbow part 40 a (a part that bends approximately 90 °) that extends slightly in the horizontal direction and then goes downward is formed following the pump discharge port 32. A swing type check valve 40b is incorporated in a horizontal discharge pipe portion near the pump discharge port 32, that is, in a horizontal portion 40x of the elbow portion 40a. As shown in FIG. 6, the check valve 40 b is formed with an inclined valve seat 40 c at the opening end of the pump suction port 30, and a swing type between the flange of the pump suction port 30 and the flange of the connecting pipe 40. The support portion 40e of the valve body 40d is sandwiched. By this pinching, the swing type valve element 40d is housed in the horizontal portion 40x so as to be swingable in the front-rear direction.
[0024]
The lower end of the connecting pipe 40 extends from the connection position of the pump suction port 30 to a lower point. At the end of the connecting pipe 40 shifted downward from the pump suction port 30, as with the suction side, a discharge side merging pipe that bends in an inverted L shape via a maintenance on-off valve, for example, a ball valve 41. 28 is detachably connected by flange connection. Thereby, the connection pipe 40 can be separated from the discharge side merging pipe 28 from a point below the pump suction port 30.
[0025]
A pressure detector 17 for detecting the discharge pressure is assembled to the left end of the pipe portion 28a extending in the lateral direction of the discharge side merge pipe 28. Further, the pipe portion 28 b extending downward of the discharge side merging pipe 28 is arranged so as to face (substantially parallel) the pipe portion 27 b extending downward of the suction side merging pipe 27. And the middle of these pipe parts 27b and 28b is connected via the bypass part 43 which bypasses to a discharge side at the time of high water distribution (when the pressure on a suction side is higher than a target pressure) (illustrated in FIG. 4). The bypass unit 43 includes a bypass pipe 44 that communicates between the pipe part 27b and the pipe part 28b, and a bypass check that has a function of opening only in the direction toward the discharge side merging pipe 28 that is housed in the bypass pipe 44. And a valve 45. A flow rate detector for stopping a small amount of water (in order to stop the pump as the amount of water becomes smaller than the target amount of water) is provided in the vertical pipe portion 27b of the suction side merging tube 27 from the bypass check valve 45 to the pump suction side. For example, a paddle type flow detector 46 is incorporated. A freezing prevention heater 47 is also attached to the pipe portion 28a extending in the lateral direction of the discharge side joining pipe 28.
[0026]
In the pump unit 23, the pipe portions 27a (portions extending in the horizontal direction) of the suction side merging pipe 27 are alternately extended laterally across the pipe portions 27 as shown in FIG. Two rectangular support bases 48 are formed. A rectangular support base 49 (extending toward the tube portion 27a) is provided at the end (pressure detector 17 side) of the tube portion 28a of the discharge-side merging tube 28 that is arranged to be shifted downward from the tube portion 27a. 1) is formed.
[0027]
On the other hand, a support member 50 for installing the pump unit is attached to the right middle part of the back plate 3 as shown in FIG. The support member 50 has one end of a support member 51 formed of, for example, a U-shaped sheet metal fixed to the inner surface of the back plate 3, and both end walls 52 of the sheet metal are arranged in two upper and lower stages. A structure in which the other end of 52 is protruded from the inner surface of the back plate 3 is used. Specifically, the upper and lower end walls 52 have a triangular shape on the upper side and a band shape on the lower side, both of which have a dimension equal to or longer than the overhang length of the top plate 4 and the side wall 5 of the gantry 1. Sticks out. Of these, a flat rectangular elastic member 53 formed by combining, for example, a rubber member and a spring member is attached to the distal end side and the base side of the upper end wall 52 corresponding to the position of each support base 48. Has been. Further, a similar flat rectangular elastic member 54 is attached to the front end side of the lower end wall 52 corresponding to the position of the support base 49.
[0028]
The pump unit 23 mounts each support base 48 on each installation seat formed by the elastic member 53, and mounts the support base 49 on the installation seat formed by the elastic member 54. The gaps between the side merging pipes 28 are placed on the support member 50 in a stable posture with the support span as the support span. Then, as shown in FIG. 3, the support base 48 (only one base) of the suction side merging pipe 27 protruding in the front direction is fixed to the support member 50 with fasteners and bolts 50a, thereby providing a heavy pump. The entire unit 23 is stably in such a posture that the suction port 29a of the cooling fan 29 is arranged at the uppermost part of the gantry 1 and the suction side / discharge side pipes connected to the multistage turbine pump unit 25 are arranged below. It is assembled to the gantry 1. By this assembly, suction is performed from the lower side of the turbine pump 26 and discharge can be performed from the front direction of the water supply device.
[0029]
The pump unit 23 is supplementarily supported at a high position of the unit 23 so that the head side does not swing due to the elasticity of the elastic members 53 and 54. For example, as shown in FIGS. 2 and 6, a support 55 elastically supported by an elastic member 56 such as a rubber member such as a support member in which a bracket 55 protruding from the discharge casing 33 is attached to the inner surface of the back plate 3 so as to be elastically displaceable. The pump unit 23 is restricted from swinging by supporting it from the lateral direction with the bolt 57 so that the pump load does not act.
[0030]
Further, a damping member, for example, a plate-like damping material 58 having a high viscosity is attached to the inner surface of the back plate 3 in the vicinity of the support member 50, and the turbine pump 26 that transmits the back plate 3 from the support member 50. The structure does not shake due to the vibration (shown in FIG. 7). However, 3a is a reinforcing material provided continuously in the width direction on the inner surface of the back plate 3 so as to pass through the vicinity of the support member 50 (shown in FIG. 7).
[0031]
Similarly to the pump unit 23, the accumulator 22 also has a lower portion of the accumulator 22 at the tip of a support member 59 (for example, made of a channel member) that protrudes in the front direction from the inner surface of the back plate 3 to the length of the side plate 5. The support base 22a formed on the base 1 is fastened, for example, fastened with bolts, and is assembled to the gantry 1. The inlet / outlet 22b of the accumulator 22 is connected to a point of the discharge side merging pipe 28 downstream of the check valve 45 via a maintenance on / off valve, for example, a ball valve 60 and a flexible pipe 61.
[0032]
On the other hand, as shown in FIGS. 2 to 4, a drain receiving tray 65 is provided in the rectangular opening 1 a surrounded by the back plate 3, the side plate 4 and the skirt plate 7 so as to close the opening. The tray 65, for example, stores a plate bent in a V shape in a rectangular frame formed by the back plate 3, the side plate 5, and the skirt plate 7, and closes the opening 1a at a height away from the ground. The peripheral edge of the plate is joined to the inner surfaces of the back plate 3, the side plate 5 and the skirt plate 7 so as to be watertight. Of course, the plate is assembled at a point below the through-holes 9 and 12 and the cable hole 11 so as not to lose contact with the outside. The tray 65 receives drainage such as condensed water dripping from the pump unit 23 or piping, and accumulates it at the lowest part where the V-shaped inclined surfaces intersect. Thus, the water supply device can be used indoors. In addition, on the plate surface of the tray 65, through holes 66 for suction piping and discharge piping for forming piping connection with the outside from the vertical direction are formed. However, the through-hole 66 is closed with a cap 67 when not in use.
[0033]
Further, on the lower portions on both sides of the lowermost portion of the tray 61 forming the collecting portion, a joint for leading drain water from the lowermost portion to the left and right drain holes 10 (below the lowermost portion of the tray 61) of the skirt plate 7, for example An elbow pipe 68 is attached. The end of the elbow pipe 68 facing the outside (the outer surface of the skirt plate 7) is normally closed with a cap (not shown). If the cap is removed and a drain pipe (not shown) is connected instead, The drain water accumulated in the tray 65 can be drained at a desired place.
[0034]
Further, a suction pipe in which a backflow prevention device 70 (a combination of an intermediate chamber 70a and a pair of check valves 70b disposed between the intermediate chambers 70a) is attached to the lower stage of the back plate 3 so as to extend in the left-right direction. 71 is assembled in the same manner as in the pump unit 23. Reference numeral 70c denotes a water leakage port of the backflow prevention device 70 (an outlet for draining backflowed water).
[0035]
That is, the suction pipe 71 is configured by connecting, in order from the left side, a downward elbow pipe 72 (input side), a maintenance on-off valve 73, a strainer 74, a backflow prevention device 70, and an upward elbow pipe 75 (exit side). . And the pressure detector 72a which detects suction pressure (pressure of a water main pipe) is assembled | attached to the corner part of the elbow pipe 72 used as the primary side of the backflow prevention apparatus 70. As shown in FIG. Further, a plate 77 having leg portions 76 on the left and right sides is attached to the side of the suction pipe 71. However, the leg portion 76 is formed of an L-shaped plate portion that projects from the side portion of the suction pipe 71 to the lower side of the suction pipe 71.
[0036]
Support members 78 protruding in the front direction beyond the length of the side plate 5 are attached to the left and right sides of the lower stage of the back plate 3. The support member 78 has an L-band plate in which one end is fixed to the inner surface of the back plate 3 and the other end is fixed to the upper surface of the tray 65, and a flat rectangular elastic member attached to the upper surface of the front end of each plate. A member 79 (for example, a member formed by combining a rubber member and a spring member) is attached.
[0037]
As shown in FIGS. 2 to 4, the suction pipe 71 including the backflow prevention device 70 mounts a leg portion 76 on each installation seat formed by the elastic member 79 and supports it with a fastener, for example, a bolt. By being fastened to the member 78, it is assembled to the back plate 3.
[0038]
The elbow pipe 75 (upward) end of the suction pipe 71 is detachably connected to the inlet end of the suction side merging pipe 27 via, for example, a maintenance on-off valve, for example, a ball valve 80, for example, by flange connection. . Thus, a directly connected water supply type pressure-increasing water supply device that is directly connected to a water main (not shown) is configured. A water supply apparatus that is not a direct water supply type may be configured to remove the suction pipe 71. A freezing prevention heater 81 is attached in the vicinity of the pressure detector 72a placed in an environment that is most likely to freeze, for example, on the side surface of the elbow pipe 72.
[0039]
The base 1 on which the various devices are assembled and the pump cover 85 that covers the open part of the base 1 are combined to form a device body S having a small depth and a high height as shown in FIGS. The various water supply pump devices 20 are housed in an outdoor specification water supply device. In addition, the apparatus main body S refers to a generic name on the side where the pump is assembled, and in the indoor specification, only the gantry 1 may be indicated.
[0040]
Specifically, the pump cover 85 has a box shape in which the inner dimensions are slightly larger than the outer shape of the gantry 1 as viewed from the front, and the two surfaces of the back surface and the bottom surface are open. And this pump cover 85 is covering the stand 1 so that each apparatus may be covered from the front direction. Specifically, the pump cover 85 has an upper edge inner surface overlapping the top plate 4, a left and right edge inner surface overlapping the left and right side plates 5, and a lower peripheral edge inner surface being the skirt plate 7 and the pump cover 85. The region where various devices are located is almost sealed so as to overlap with the side plate 5 portion that follows the front plate 1. The pump cover 85 and the gantry 1 are placed between the eyebolts 86 (members used when suspending the entire water supply device) for suspending the device, which are inserted on both sides of the top plate 4 from both sides of the upper edge. It is fastened with a seal member interposed therebetween. Reference numeral 89a denotes a bolt hole for an eyebolt formed at the upper edge of the top plate 4 and the pump cover 85.
[0041]
As shown in FIGS. 3 and 4, the pump cover 85 is inclined in such a direction that the front wall 85 a facing the turbine pump 26 becomes narrower from the DC motor 24 as it goes upward from near the middle of the connecting pipe 40. In addition, due to the space restriction by the inclined portion 85b, a short circuit (a phenomenon in which the blown air from the suction port 29a is directly sucked into the blowout port 29b) hardly occurs on the front side of the DC motor 24. is doing. A sound absorbing material 87 is provided on the inner surface of the inclined portion 85b approaching the turbine pump 26 so as to effectively absorb noise from each portion of the turbine pump.
[0042]
In addition, the inner surface of the pump cover 85 has heat insulation so as to surround the suction pipe 71 including the backflow prevention device 70 from the same position as the upper end position of the skirt plate 7 or slightly above the upper position to an upper position. The sound absorbing material 88 is attached, and the lower part of the apparatus where the internal atmosphere is cooled is kept warm, and at the same time, the internal noise is not leaked from the lower end of the pump cover 85.
[0043]
In addition, a sound absorbing material 89 is attached to each part of the inner surface of the pump cover 85 to prevent noise from leaking from the pump cover 85 to the outside. Furthermore, a metal plate for preventing overturning, that is, a plate 90 having a bolt insertion hole 90a is attached to the upper rear surface of the back plate 3, and when the water supply device is installed, if the plate 90 is fastened to a wall surface of a building or the like, The installed water supply equipment is prevented from falling.
[0044]
In addition, a water leak check window 91 is provided below the front wall 85a of the pump cover 85 for visually checking the leak state of the backflow prevention device 70 from the outside. In addition, a window 92a for viewing various display units 21b of the control unit 21 from the outside and a window 92b for viewing the pump state are provided on the upper stage.
[0045]
Thus, when installing such a water supply device, the anchor plate 15 is fastened with an anchor bolt 93 at an outdoor or indoor installation location, and the fall prevention plate 90 is bolted to the wall of the building along the back of the gantry 1. After stopping and fixing the water supply device, the water pipe 94 separated from the water main pipe (not shown) is connected to the inlet of the suction pipe 71 using, for example, the through holes 9 and 12 of the skirt plate 7 and discharged similarly. What is necessary is just to connect the exit of the side junction pipe 28 to the water supply piping 95 connected to a faucet (not shown).
[0046]
Here, the control panel 21 is connected to each device through cables (not shown) wired along the inner surface of the back plate 3.
[0047]
When the control panel 21 detects that one side (one unit) of the turbine pump 26 detects that the discharge pressure is lower than the target pressure from the pressure signal from the pressure detector 17 on the discharge side, the target pressure is kept constant. Inverter operation (constant pressure control) is performed. That is, the turbine pump 26 increases the water from the water pipe 94 sucked through the suction pipe 71 and the suction-side merging pipe 27 so as to become a constant pressure, and the increased water is connected to the connecting pipe 40 and the discharge-side merging pipe 28. , And supplied to the faucet through the water supply pipe 95.
[0048]
When the amount of water used decreases, the rotational speed (capacity) of the turbine pump 26 is reduced according to the flow rate signal of the flow rate detector 46. Further, when the amount of water used becomes equal to or less than the predetermined amount of water used, the operating turbine pump 26 is stopped, and the water supply by the accumulator 22 is started. During operation of the turbine pump 26, each part in the pump cover 85 is cooled by the cooling fan 29 of the DC motor 24. Specifically, the uppermost layer air in the pump cover 85 is sucked from the suction port 29a, and the air is blown out from the blower outlet 29b along the motor body of the DC motor 24. As a result, the blown air cools the DC motor 24 and flows to the pump unit 25 through which the water on the lower side passes, and also to the piping. At this time, the exhaust flow (hot air) whose temperature has risen due to the cooling of the DC motor 24 is cooled by exchanging heat by touching the outer wall surface of the pump unit 25 and the outer wall surface of the piping member that are cooled by the supplied water. The Then, the cooled exhaust stream is guided to each part in the pump cover 85 to cool each part.
[0049]
Further, when the water main pressure exceeds the target pressure during operation (during high water distribution), the water directed to the turbine pump 26 is bypassed (short-circuited) to the discharge-side merging pipe 28 through the bypass check valve 45. . The flow rate detector 46 between the check valve 45 and the pump suction port 30 detects a decrease in the amount of water (small amount of water) toward the turbine pump 26 and stops the operation of the turbine pump 26. As a result, the pressure water from the water main is directly led to the faucet without increasing the pressure in the water supply device.
[0050]
In such a water supply apparatus, the discharge pipe of the vertical turbine pump 26, that is, the connecting pipe 40 extends slightly toward the front of the water supply apparatus and then moves downward, so that the discharge pipe is disposed above the vertical turbine pump 26. The height dimension of the water supply device can be suppressed.
[0051]
Moreover, it is possible to easily take out the failed turbine pump 26 after switching from one failed turbine pump 26 to a sound operation of the other turbine pump 26. Specifically, when removing the failed turbine pump 26 from the water supply device (device main body S), first, the pump cover 85 is removed, and then the ball valve 36 on the suction side of the failed turbine pump 26 is the same. The ball valve 41 on the discharge side is closed. Next, the flange of the pump suction port 30 is removed from the closed ball valve 36, and the lower end flange of the connecting pipe 40 is removed from the closed ball valve 41. Thereafter, the support of the pump unit 25 of the failed turbine pump 26 and the support of the DC motor 24 are released, and the entire failed turbine pump 26 may be pulled out together with the connecting pipe 40 in the front direction.
[0052]
That is, as shown in FIG. 6B, the lower end (divided end) of the connecting pipe 40 of the turbine pump 26 that has failed is lower than the position of the pump suction port 30 at the lower end of the pump 26 by a sign δ. The turbine pump 26 is easily removed from the front of the water supply device. That is, the front surface of the turbine pump 26 is in a state where there is no obstacle that blocks the removal of the turbine pump 26 as shown in FIG. If the water pump is pulled out in the front direction, it can be easily taken out from the place where the failed turbine pump 26 is installed. Of course, the connecting pipe 40 alone may be taken out from the water supply device first, and then the turbine pump 26 may be taken out from the water supply device.
[0053]
Further, since the swing type check valve 40b is provided in the horizontal portion 40x near the pump discharge port 32, the air that is mixed into the pump portion 25 and accumulated in the uppermost portion of the pump portion 26, that is, the discharge casing 33 is easily discharged. it can. That is, the swing type check valve 40b is a valve having a weak closing force that closes due to gravity, so that the air in the discharge casing 33 is easily discharged, and the air discharge performance is excellent. In particular, since the turbine pump 26 is operated by an inverter (to make a slow stop), a quick closing function is not necessary, and a swing type check valve 40b that closes by gravity is sufficient. Thereby, it is possible to prevent the sliding portion of the mechanical seal 25a at the uppermost portion of the pump portion 25 from being worn by being cooled by water.
[0054]
In addition, the swing type check valve 40b has a horizontal part 40x of the connection pipe 40 as a storage location, a valve seat 40c is formed at the pump discharge port 32, and a swing type valve element 40d is accommodated in the horizontal part 40x. Since it is a structure utilizing the piping portion from 40 lateral direction to the downward direction, it is compact, simple in structure, and inexpensive in cost.
[0055]
In addition, in one Embodiment mentioned above, although the direct water supply type water supply apparatus is mentioned as an example, it is not restricted to this, A water supply apparatus without a backflow prevention apparatus may be used.
[0056]
【The invention's effect】
As described above, according to the first aspect of the present invention, the discharge pipe of the vertical pump extends slightly toward the front of the water supply device and then moves downward, so that the discharge pipe is disposed above the vertical pump. As a result, the height of the water supply device can be reduced.
[0057]
Therefore, the overall height of the water supply device can be reduced.
[0058]
According to invention of Claim 2, in addition to the said effect, there exists an effect that it can take out from a water supply apparatus easily from the place which installed the failed pump.
[0059]
According to the third aspect of the present invention, in addition to the above effects, the air accumulated at the uppermost portion in the vertical pump portion can be easily discharged. In addition, the swing type check valve is incorporated in the horizontal part of the discharge pipe by using the pipe part, so that there is an advantage that the structure is simple and the cost is low.
[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 a front view of a cross section of a pump cover of the water supply device.
FIG. 3A is a side sectional view taken along line AA in FIG.
(B) is a sectional side view along BB in FIG.
4 is a side sectional view taken along the line CC in FIG. 2. FIG.
FIG. 5 is a cross-sectional plan view along DD in FIG.
FIG. 6 is a cross-sectional view for explaining an operation of taking out a failed turbine pump from an installation place.
FIG. 7 is an exploded perspective view for explaining the entire structure of the water supply pump.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Back wall 15 ... Plate 23 for anchors ... Vertical pump unit 24 ... Brushless DC motor (motor)
25 ... Multi-stage turbine pump unit 26 ... Multi-stage turbine pump 27 ... Suction side merging pipe 28 ... Discharge side merging pipe 30 ... Pump suction port 32 ... Pump discharge port 41 ... Ball valve (open / close valve)
40 ... Connecting pipe (split discharge pipe)
40a ... Elbow part 40b ... Swing check valve 40c ... Valve seat 40d ... Swing type valve element 40x ... Horizontal part S ... Device main body.

Claims (2)

In the water supply apparatus configured by detachably assembling the vertical pump in the apparatus main body opened in the front direction,
The vertical pump comprises a turbine pump configured in a unit having a motor in the upper part and a multistage turbine pump unit driven by the motor in the lower part,
And the turbine pump part has a pump suction port that opens to the lower side at the lower end, and has a pump discharge port that opens in the front direction of the device at the upper part,
A suction pipe is connected to the pump suction port, a discharge pipe directed downward is connected to the pump discharge port, and suction is made from the lower side of the vertical pump to discharge from the front direction of the device.
The pump suction port is detachably connected to the suction pipe,
The discharge pipe is divided at a point below the connection position of the pump suction port, and both of the divided pipes are detachably connected via an on-off valve. In the water supply apparatus configured by detachably assembling the vertical pump in the apparatus main body opened in the front direction,
The vertical pump comprises a turbine pump configured in a unit having a motor in the upper part and a multistage turbine pump unit driven by the motor in the lower part,
And the turbine pump part has a pump suction port that opens to the lower side at the lower end, and has a pump discharge port that opens in the front direction of the device at the upper part,
A suction pipe is connected to the pump suction port, a discharge pipe directed downward is connected to the pump discharge port, and suction is made from the lower side of the vertical pump to discharge from the front direction of the device.
The discharge pipe has a horizontal portion extending from the pump discharge port in a substantially horizontal direction along the front direction of the water supply device,
Furthermore, it has a valve seat on the pump discharge port side, and a swing type valve body that comes in contact with and separates from the valve seat in the horizontal portion is housed in a swingable manner,
A water supply apparatus, wherein a check valve is built in a discharge pipe portion near the pump discharge port.

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