JP2018145949A - Water supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water supply device that can prevent water in the water supply device from being frozen by cold air from an installation surface.SOLUTION: A water supply device comprises an impeller for pressurizing water, an electric motor 3 for rotating the impeller, a casing 6 inside which water pressurized by the impeller flows, a base 10 for partitioning an installation surface for the water supply device, a pressure tank 9 arranged above the base and communicating with the casing, and a heat insulating member 55 arranged below an upper wall 61 of the base. At least two ventilating holes 10a are formed in a side wall of the base, and the heat insulating member is located above the ventilating holes.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a water supply apparatus for pumping water from a water source such as a well or a water tank and supplying the water into a building such as a house.

  Conventionally, in order to supply water to a building such as a house, a water supply device that draws water from a well or a water tank has been used. Such a water supply device includes a type having a submersible pump and a self-priming type using a cascade pump. In both types, the water supply device is installed outdoors and is configured to transfer water indoors from a water source located outdoors.

  FIG. 15 is a schematic diagram showing a self-priming type water supply apparatus. As shown in FIG. 15, the water supply apparatus 200 is installed on the ground adjacent to the house 201. The suction port of the water supply apparatus 200 is connected to the suction pipe 202, and the tip of the suction pipe 202 is located in the well. A discharge port of the water supply apparatus 200 is connected to a water pipe 205 installed in the house 201. The water distribution pipe 205 is connected to a faucet (for example, a faucet) 207.

  FIG. 16 is a schematic diagram showing the structure of the water supply apparatus 200 shown in FIG. The water supply apparatus 200 includes a base 208 made of synthetic resin, a pump 210 that pressurizes water, an electric motor 211 that rotates the pump 210, and a pressure tank 213 connected to the discharge side of the pump 210. The pump 210 is installed on the base 208. The inside of the pressure tank 213 is partitioned into an air chamber 217 and a liquid chamber 218 by a diaphragm 215. The water sent from the pump 210 into the liquid chamber 218 compresses the air in the air chamber 217 via the diaphragm 215, and the pressure of this compressed air acts on the water in the liquid chamber 218. In the water supply apparatus 200, when the faucet 207 is closed and water is no longer used, the pump 210 is stopped. Before the pump 210 is stopped, the pressure of the water pressurized by the pump 210 is held by the pressure tank 213 by accumulating pressure in the pressure tank 213.

  When the faucet 207 in the house 201 is opened while the pump 210 is stopped, first, water held in the pressure tank 213 is sent into the house 201. When the pressure on the discharge side of the pump 210 is reduced to a preset starting pressure, the pump 210 is activated and water is transferred to the house 201 by the operation of the pump 210.

  A channel tube 220 is disposed in the base 208. This flow path pipe 220 is used as a drain pipe for draining water in the water supply apparatus 200 when the pump 210 is not operated for a long time, or as a spare discharge pipe for changing the water discharge direction. Also used. Usually, the open end of the flow channel 220 is closed with a drain plug 221. A plurality of cutouts 208a (only one cutout 208a is shown in the figure) are formed on the side wall of the base 208 to function as handles for enabling the entire water supply apparatus 200 to be carried. Moreover, since the water supply apparatus 200 is installed outdoors, it has a cover 212 for protecting each device such as the pump 210, the electric motor 211, and the pressure tank 213.

JP 2004-84507 A

  As shown in FIG. 15, the water supply apparatus 200 is normally installed on a foundation 222 such as concrete. When the temperature is low in winter, the foundation 222 itself may freeze. In such a case, when the cold air of the foundation 222 rises in the base 208 and contacts the flow channel tube 220 and water is not used at midnight or the like, the water in the flow channel tube 220 is frozen. The notch 208a formed in the base 208 forms a passage for the outside air and has a role of releasing the cool air trapped in the base 208 to the outside. However, since the channel tube 220 is arranged at a position higher than the notch 208a, the cool air around the channel tube 220 does not escape much from the outside air flow. In particular, when there is no wind or light wind, the flow of outside air is not formed in the base 208, and the cold air from the base 222 stays in the base 208. As a result, the water in the flow channel tube 220 freezes.

  The channel tube 220 is made of metal, while the base 208 is made of synthetic resin. Synthetic resins have low ductility at temperatures that freeze outside, and are less susceptible to impacts due to expansion during freezing of water. For this reason, when the water in the flow channel tube 220 is frozen, the portion of the base 208 that is in contact with the flow channel tube 220 may be damaged by an impact during freezing in the flow channel tube 220.

  Moreover, since the water supply apparatus 200 mentioned above is installed in a household, weight reduction is calculated | required. For this reason, a synthetic resin may be used for a liquid contact portion (pipe, casing (not shown), etc.) that is a flow path of the handling liquid of the pump 210. Normally, the liquid contact part described above is filled with the handling liquid (water) so that the pump 210 does not suck air during operation. As described above, when the cool air from the base 222 stays in the base 208, the base 208 is cooled, and the entire cover 212 is further cooled, the synthetic resin portion of the wetted portion is frozen by water (handling liquid). There is a risk of damage.

  In a cold region, a heater that operates when the temperature falls can be attached to the flow path tube 220 to prevent water from freezing. Further, when the pump 210 is not used for a long time, the water in the pump 210 can be removed to prevent the liquid contact portion from being damaged due to freezing of water. However, even in a warm region where freezing cannot be predicted, if the installation environment as described above overlaps with an adverse condition such as a cold wave due to recent abnormal weather, the water in the water supply apparatus 200 freezes and the resin contact is made. The liquid part may be damaged.

  Then, an object of this invention is to provide the water supply apparatus which can prevent freezing of the water in the water supply apparatus by the cold air from an installation surface.

  In order to achieve the above-described object, one embodiment of the present invention includes an impeller for pressurizing water, an electric motor that rotates the impeller, and a casing through which water pressurized by the impeller flows. A base for partitioning the installation surface of the water supply device, a pressure tank disposed above the base and communicating with the casing, and a heat insulating member disposed below the upper wall of the base, At least two ventilation holes are formed in the side wall of the base, and the heat insulation member is located above the ventilation holes.

In a preferred aspect of the present invention, the heat insulating member is a lid member fixed to the base.
In a preferred aspect of the present invention, the heat insulating member is an in-situ foam heat insulating material in close contact with the base.
In a preferred aspect of the present invention, a heat insulating material is further provided between the upper wall of the base and the heat insulating member.
In a preferred aspect of the present invention, a height adjusting member for supporting the base and the heat insulating member is further provided.
In a preferred aspect of the present invention, a leg portion is connected to the heat insulating member, and the height adjusting member is attached to the leg portion.
In a preferred aspect of the present invention, the base is made of a synthetic resin.

  According to the present invention, since the cool air from the installation surface is blocked by the heat insulating member, it is possible to prevent the water in the water supply apparatus from freezing. Moreover, since the heat insulation member is located above the ventilation hole of a base, the cool air in a base can be escaped outside from a ventilation hole.

It is a perspective view of the water supply apparatus which concerns on one Embodiment. It is a top view of a water supply apparatus when a cover is removed. It is a longitudinal cross-sectional view of the water supply apparatus shown by FIG. It is a side view of the water supply apparatus shown by FIG. It is a figure which shows the state which removed the fastener and the cover member from the base. It is a top view of a lid member. It is a side view which shows other embodiment of a water supply apparatus. It is a side view which shows other embodiment of a water supply apparatus. It is a side view which shows other embodiment of a water supply apparatus. It is an expanded sectional view showing other embodiments of a height adjustment member. It is an expanded sectional view showing other embodiments of a height adjustment member. It is an expanded sectional view showing other embodiments of a fastener. It is a schematic diagram which shows the water supply apparatus provided with the submersible pump. It is a figure which shows the main-body part of the water supply apparatus shown in FIG. It is a schematic diagram which shows a self-priming type water supply apparatus. It is a schematic diagram which shows the internal structure of the water supply apparatus shown in FIG.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a water supply apparatus according to an embodiment. The water supply apparatus 1 is used for the purpose of pumping water from a water source such as a well or a water tank and supplying the water into a building such as a house. For example, as in the example shown in FIG. 15, the water supply apparatus 1 is installed outdoors and supplies water to an indoor faucet (for example, a faucet). Moreover, the water supply apparatus 1 is also used for the water supply of pressurized water when the water main pressure is insufficient on the second or third floor.

  As shown in FIG. 1, a water supply apparatus 1 controls a pump 2 that pressurizes water, an electric motor 3 that drives the pump 2, an inverter 7 that makes the electric motor 3 variable speed, and a water supply operation (that is, the operation of the pump 2). And a base 10 on which the pump 2, the electric motor 3, and the inverter 7 are arranged. In the present embodiment, the control unit 13 is disposed inside the inverter 7, but may be disposed outside the inverter 7. The inverter 7 is connected to the electric motor 3 by an electric cable (not shown). The control unit 13 transmits a command value for the target rotational speed to the inverter 7, and the inverter 7 is configured to rotate the electric motor 3 at the target rotational speed. If the pump 2 does not need to be controlled at a variable speed, the inverter 7 may be omitted.

  The pump 2 and the inverter 7 are supported by the base 10. More specifically, the bottom of the pump 2 and the bottom of the inverter 7 are fixed to the upper surface of the base 10. In one embodiment, the electric motor 3 and the pressure tank 9 are fixed to the pump 2. The water supply apparatus 1 further includes a cover 12 that houses the pump 2, the electric motor 3, the pressure tank 9, and the inverter 7 (and the control unit 13). The cover 12 is detachably attached to the base 10.

  FIG. 2 shows a top view of the water supply apparatus 1 when the cover 12 is removed. As shown in FIG. 2, by arranging the pump 2, the electric motor 3, the pressure tank 9, and the inverter 7 (and the control unit 13) on the projection surface of the base 10 and above the base 10, the base 10 The installation surface of the water supply apparatus 1 can be partitioned. The cover 12 serves to protect the pump 2, the electric motor 3, the pressure tank 9, and the inverter 7 (and the control unit 13) from the outdoor environment (from direct sunlight, wind and rain, dust, etc.). Here, the electric motor 3 and the pressure tank 9 are not fixed to the pump 2 but may be partitioned from the installation surface by the base 10. Specifically, the position and fixing method of the electric motor 3 and the pressure tank 9 are not particularly limited as long as the electric motor 3 and the pressure tank 9 are disposed above the base 10 and stored in the cover 12.

  The water supply apparatus 1 includes a suction port 18 to which a suction pipe extending from a water source (for example, reference numeral 202 in FIG. 15) is connected, and a water distribution pipe (for example, reference numeral 205 in FIG. 15) installed in a building such as a house. It has a discharge port 19 to be connected. The suction port 18 is provided in an inlet pipe 20 connected to the suction side of the pump 2, and the discharge port 19 is provided in an outlet pipe 21 connected to the discharge side of the pump 2.

  FIG. 3 is a longitudinal sectional view of the water supply apparatus shown in FIG. As shown in FIG. 3, the pump 2 of the present embodiment is a self-priming pump composed of a cascade pump, and includes an impeller 15 for pressurizing water. The rotating shaft of the electric motor 3 is connected to the impeller 15, and the impeller 15 is rotated by the electric motor 3. The impeller 15 is composed of a disk having a large number of grooves extending radially. Since the cascade pump has a self-priming property, it is suitable for pumping water stored in a water source having a water surface at a lower position than the pump 2 such as a water tank or a well.

  The pump 2 has a casing 6 in which an impeller chamber 23 for accommodating the impeller 15 is formed. The casing 6 further includes a suction chamber 26 positioned upstream of the impeller chamber 23 and a gas-liquid separation chamber 27 positioned downstream of the impeller chamber 23. The suction chamber 26 is connected to the impeller chamber 23, and the impeller chamber 23 is connected to the gas-liquid separation chamber 27. A suction channel 30 communicating with the suction port 18 (see FIG. 1) is provided upstream of the suction chamber 26, and communicating with the discharge port 19 (see FIG. 1) downstream of the gas-liquid separation chamber 27. A discharge channel 31 is provided. The casing 6 has a fluid inlet 6a and a fluid outlet 6b at the lower part thereof. The fluid inlet 6a of the casing 6 is connected to an inlet pipe 20 having a suction port 18 shown in FIG. 1, and the fluid outlet 6b of the casing 6 is connected to an outlet pipe 21 having a discharge port 19 shown in FIG.

  The pump 2 is a self-priming pump that can discharge the air in the suction pipe 202 (see FIG. 16) by the operation of the pump 2 itself only by priming water, which will be described later, inside the casing 6. The pump 2 performs a self-priming operation for discharging the air in the suction pipe 202 from the discharge port 19, and then performs a pumping operation for discharging only water from the discharge port 19. Therefore, the self-priming pump is suitable as a well pump for home use in which water in the suction pipe 202 may be dropped when the pump 2 is started. Water (and air) flows through the inside of the casing 6 in the order of the suction channel 30, the suction chamber 26, the impeller chamber 23, the gas-liquid separation chamber 27, and the discharge channel 31.

  The suction flow path 30 extends from the fluid inlet 6 a of the casing 6 to the suction chamber 26. A check valve 14 is disposed at the downstream end of the suction flow path 30. The check valve 14 allows water to flow from the suction flow path 30 of the casing 6 into the suction chamber 26 during operation of the pump 2, while water from the suction chamber 26 is stopped when the operation of the pump 2 is stopped. Back flow to the suction flow path 30 is prevented.

  In the present embodiment, the check valve 14 has not only a function of preventing a back flow of water but also a function of a small water amount detector that detects that the flow rate of water flowing through the pump 2 is equal to or less than a predetermined small amount of water. . More specifically, when the flow rate of water passing through the casing 6 is reduced to a predetermined small amount of water, the check valve 14 generates a small amount of water detection signal. The check valve 14 is connected to a control unit 13 (see FIG. 1) via a signal line (not shown), and a small water amount detection signal is transmitted to the control unit 13.

  The pressure tank 9 is connected to the discharge side of the casing 6. More specifically, the pressure tank 9 is connected to the gas-liquid separation chamber 27. The pressure tank 9 is a pressure holder for holding the pressure of the water pressurized by the impeller 15, and the pressure of the water while the pump 2 is stopped is held by the pressure tank 9. The pressure tank 9 is located downstream of the impeller 15 and the impeller chamber 23. The configuration of the pressure tank 9 is the same as that of the pressure tank 213 shown in FIG.

  Before operating the pump 2 for the first time, with the pump 2 stopped, the cap 29 is removed from the priming inlet 6c formed in the upper part of the casing 6, and the suction chamber 26, the impeller chamber 23, And water is supplied to the gas-liquid separation chamber 27. The water supplied from the priming water inlet 6c is referred to as “priming water”. When priming water is supplied to the suction chamber 26, the impeller chamber 23, and the gas-liquid separation chamber 27, the valve body 14 a of the check valve 14 is fixed to the downstream end of the suction flow path 30 by its own weight. Pressed against the valve seat 14c. Therefore, the priming water is prevented from flowing back from the suction chamber 26 to the suction flow path 30. After the priming water supply is completed, the priming water inlet 6 c is closed by the cap 29.

  Subsequently, when the impeller 15 is rotated by driving the electric motor 3, the water in the impeller chamber 23 is agitated, and a negative pressure is formed in the suction chamber 26 upstream of the impeller chamber 23. Due to this negative pressure, the valve body 14a of the check valve 14 is pushed up and separated from the valve seat 14c (that is, the check valve 14 is opened), so that the air in the suction pipe 202 (see FIG. 15) is sucked into the suction flow path. 30 and the suction chamber 26 and flows into the impeller chamber 23. The air flowing into the impeller chamber 23 is mixed with the water in the impeller chamber 23, and the mixed fluid of air and water is discharged from the impeller chamber 23 to the gas-liquid separation chamber 27.

  The gas-liquid separation chamber 27 is provided with a baffle 35 with which the fluid discharged from the impeller chamber 23 collides. When the pump 2 is performing the self-priming operation, the mixed fluid of water and air collides with the baffle 35, so that the air is separated from the water. Air is discharged from the discharge port 19 of the water supply apparatus 1 through the discharge channel 31 from the gas-liquid separation chamber 27. Water is returned to the impeller chamber 23 through a circulation hole 28 formed in the lower portion of the gas-liquid separation chamber 27. The water returned to the impeller chamber 23 is mixed again with the air flowing into the suction chamber 26. By repeating such an operation, the air present in the suction pipe 202 (see FIG. 15) is discharged through the casing 6. When the suction pipe 202 is filled with water, the pump 2 starts a pumping operation for discharging only water.

  Connected to the upper part of the gas-liquid separation chamber 27 is a pressure sensor 11 for measuring the pressure of the fluid in the gas-liquid separation chamber 27, that is, the discharge side pressure. During the self-priming operation, the only fluid present in the upper part of the gas-liquid separation chamber 27 is air, and the measured pressure value is almost atmospheric pressure. On the other hand, during the pumping operation, since the gas-liquid separation chamber 27 is filled with water, the pressure sensor 11 measures the pressure of the water pressurized by the rotation of the impeller 15.

  The casing 6 and the gas-liquid separation chamber 27 are liquid contact portions in the water supply apparatus 1, and a part or all of them may be molded with a synthetic resin.

  The pressure sensor 11 is connected to the control unit 13 via a signal line (not shown). The control unit 13 is based on the pressure signal output from the pressure sensor 11 and operates at the operating speed of the pump 2 during the pumping operation ( That is, the rotational speed of the impeller 15 is controlled. In general, the discharge pressure is constant so as to control the operation speed of the pump 2 so that the discharge pressure of the pump 2 matches the target pressure, or the water pressure at the end of the faucet such as a faucet by appropriately changing the target pressure. The estimated terminal pressure constant control or the like is performed to control the constant pressure. The pressure on the discharge side of the pump 2 is measured by the pressure sensor 11 and monitored by the control unit 13.

  When the amount of water used in the building is small during operation of the pump 2 and a small water amount detection signal is transmitted from the check valve 14 to the control unit 13, the control unit 13 temporarily increases the operation speed of the pump 2. The inverter 7 is instructed to accumulate the pressure in the pressure tank 9, and then the operation of the pump 2 is stopped (small water amount stop operation). When the operation of the pump 2 is stopped, the inflow of water into the casing 6 is stopped and the check valve 14 is closed. The check valve 14 prevents water existing in the casing 6 from flowing backward, and can store water in the casing 6. When water is used in the building when the pump 2 is stopped, first, water held in the pressure tank 9 is sent into the building. After that, when the pressure on the discharge side of the pump 2 is reduced to a preset starting pressure, the pump 2 is started, and the operation of the pump 2 (the above-described “constant pressure constant control” or “estimated terminal pressure constant control”) is performed. Water is transferred to the building. Thereafter, when the amount of water used in the building decreases during the operation of the pump 2, the small amount of water is stopped. In this way, the operation of the pump 2 (“constant pressure control” or “presumed terminal pressure constant control”, etc.) and the small amount of water stop with the use of water in the building are called automatic water supply operation.

  FIG. 4 is a side view of the water supply apparatus 1 shown in FIG. FIG. 4 shows a cross section of the base 10. The water supply apparatus 1 includes a flow path pipe 51 communicating with the discharge side of the casing 6, a drain plug 70 detachably attached to the opening end of the flow path pipe 51, and a lid member 55 fixed to the base 10. It has more. The base 10 has a hollow shape with an open lower end. In the present embodiment, the base 10 viewed from above has a rectangular shape. The base 10 and the lid member 55 are made of a synthetic resin such as polypropylene. The synthetic resin forming the base 10 and the synthetic resin constituting the lid member 55 may be the same type or different types.

  The channel pipe 51 is made of metal. In one embodiment, a part of the flow path pipe 51 is arranged below the upper wall 61 of the base 10 where the pump 2, the inverter 7, and the like are installed. 61 is fixed. The flow channel 51 is in fluid communication with the discharge side of the pump 2. Therefore, the pressure of the water pressurized by the pump 2 acts on the channel pipe 51, but the pressurized water does not flow as long as the opening end of the channel pipe 51 is closed by the drain plug 70. It is not discharged from the channel 51. When the water supply apparatus 1 is not operated for a long period of time, water remaining in the water supply apparatus 1 can be discharged by removing the drain plug 70 from the flow path pipe 51. Thus, the channel pipe 51 not only functions as a drain pipe, but also changes the attachment position of the drain plug 70 from the opening end of the channel pipe 51 to the discharge port 19 shown in FIG. The open end of the tube 51 can be used as a discharge port.

  The channel pipe 51 is a liquid contact part in the water supply apparatus 1 that is in contact with the carrier liquid (water) of the pump 2. In one embodiment, part or all of the channel tube 51 may be formed integrally with the base 10. In that case, the channel tube 51 is formed of a synthetic resin. Even when the base 10 and the metal flow pipe 51 are provided separately, only a part of the flow pipe 51 may be formed of a synthetic resin, and at least a part of the metal pipe may be formed. A pipe covered with a synthetic resin may be used as the flow path pipe 51.

  The base 10 includes an upper wall 61 on which the pump 2 and the inverter 7 are installed, and a side wall 62 that extends downward from the entire edge of the upper wall 61. In order to make it easy to carry the entire water supply apparatus 1, the two side walls 62 of the base 10 are each provided with two ventilation holes 10 a that function as handles. In FIG. 4, only one of the two ventilation holes 10a is drawn. In the present embodiment, the ventilation hole 10a is configured by a notch formed in the side wall 62 of the base 10, but may be a hole having a size that can function as a handle.

  A step portion 63 is provided on the lower side of the upper wall 61 and on the inner side of the side wall 62. The step portion 63 extends along the entire circumference of the side wall 62 so as to surround the flow channel pipe 51. The step portion 63 has a horizontal lower surface 63 a, and the lid member 55 is fixed to the lower surface 63 a of the step portion 63 by a fastener 68. In the present embodiment, the step portion 63 is connected to the lower surface of the upper wall 61 and the inner surface of the side wall 62. The upper wall 61, the side wall 62, and the step part 63 are integrally formed of synthetic resin. In one embodiment, the stepped portion 63 may be connected only to either the lower surface of the upper wall 61 or the inner surface of the side wall 62.

  The lid member 55 is disposed below the upper wall 61 of the base 10 and is disposed in the internal space of the base 10 formed by the upper wall 61 and the side wall 62 of the base 10. The lid member 55 is fixed to the base 10 with a fastener 68 in contact with the stepped portion 63 of the base 10. The lid member 55 is located below the flow channel pipe 51. A space 65 is formed between the upper surface of the lid member 55 and the inner surface of the base 10, and the flow channel pipe 51 is disposed in the space 65. The space 65 is formed by at least the upper wall 61 and the step portion 63 of the base 10 and the lid member 55. The channel pipe 51 is covered with a lid member 55. The space 65 may be a closed space or a non-closed space.

  The lid member 55 has a side surface shaped along the inner side surface of the base 10. A plurality of (four in this embodiment) leg portions 83 are connected to the lower surface of the lid member 55. In one embodiment, the legs 83 may not be present. The lid member 55 and the leg portion 83 are integrally formed from a synthetic resin such as polypropylene. The screw hole 73 is formed in the lid member 55 and the leg portion 83. The lid member 55 is positioned above the ventilation hole 10a so that the ventilation hole 10a of the base 10 can function as a handle and a passage of outside air is formed in the base 10 as indicated by an arrow in FIG. doing.

  The fastener 68 extends through the base 10 and the lid member 55, and the distal end of the fastener 68 is fitted to the leg portion 83. Screws, screws, bolts, or the like are used for the fasteners 68 that fix the lid member 55 to the base 10. When the fastener 68 is removed, the lid member 55 can be removed from the base 10.

  FIG. 5 is a view showing a state in which the fastener 68 and the lid member 55 are removed from the base 10. As shown in FIG. 5, the base 10 is formed with a through hole 71 into which the fastener 68 is inserted. One end of the through hole 71 opens at the upper surface of the base 10, and the other end of the through hole 71 opens at the lower surface 63 a of the step portion 63 of the base 10. In the present embodiment, the base 10 viewed from above is rectangular, and four through holes 71 are formed at the four corners of the base 10. An opening end of a screw hole 73 into which the fastener 6 is inserted is formed on the upper surface of the lid member 55.

  FIG. 6 is a top view of the lid member 55. The lid member 55 viewed from above has a rectangular shape. At the four corners of the lid member 55, the open ends of the screw holes 73 described above are formed. The lid member 55 is an example of a heat insulating member, and may be formed of a synthetic resin having a low thermal conductivity. Moreover, you may form a part of lid member 55 using a heat insulating material, a nonwoven fabric, etc. FIG. The lid member 55 only needs to function as a heat insulating member and to block cool air from the installation surface.

  According to the present embodiment, the lid member 55 that is a heat insulating member is attached to the upper wall 61 of the base 10 on which the pump 2, the inverter 7, and the like are installed. The lid member 55, which is a heat insulating member, blocks cold air from a foundation such as concrete (see reference numeral 222 in FIG. 16), so that water in the flow path pipe 51 or water in the wetted part of the liquid handled by the pump 2 is removed. Freezing can be prevented. Furthermore, it is possible to prevent intrusion of water, insects, slugs and the like from the vent hole 10a. Although not shown, a heater that operates when the temperature drops may be attached in the space 65 (for example, the flow path pipe 51). If it does so, the heat of a heater can be prevented from escaping from the ventilation hole 10a, and the freezing in the water supply apparatus 1 can be prevented effectively with fewer heat sources.

  FIG. 7 is a side view showing another embodiment of the water supply apparatus 1. Since the configuration and operation of the present embodiment not specifically described are the same as those of the above-described embodiment shown in FIGS. 1 to 6, redundant description thereof is omitted. In this embodiment, the water supply apparatus 1 is further provided with the heat insulating material 88 arrange | positioned in the space 65 between the cover member 55 which is a heat insulating member, and the upper wall 61 of the base 10. FIG. In the present embodiment, the heat insulating material 88 is disposed on the upper surface of the lid member 55. The heat insulating material 88 preferably covers the entire top surface of the lid member 55. The heat insulating material 88 is sandwiched between the lower surface 63 a of the stepped portion 63 of the base 10 and the upper surface of the lid member 55. Examples of the heat insulating material 88 include rigid urethane foam used as a heat insulating material for a house, and fiber-based heat insulating materials such as glass wool, rock wool, and cellulose fiber.

  The heat insulating material 88 disposed on the lid member 55 prevents the temperature in the space 65 between the lid member 55 and the base 10 from decreasing, and the resin wetted part due to freezing of the liquid in the water supply apparatus 1 and It is possible to more reliably damage the resin part in contact with the wetted part. Furthermore, the heat insulating material 88 also functions as a buffer material, and can prevent the vibration of the pump 2 from being transmitted to the lid member 55 and prevent the fastener 68 from loosening.

  As shown in FIG. 8, an in-situ foam heat insulating material 89 such as a spray urethane foam heat insulating material may be used instead of or in addition to the lid member 55 that is the heat insulating member described above. Since the base 10 has a complicated shape to reinforce the flow pipe 51 and strength, if the in-situ foam heat insulating material 89 is brought into close contact with the upper wall 61 of the base 10 by spraying, the heat insulating effect can be further increased. Can do. In this case, the in-situ foam heat insulating material 89 may be sprayed on the grounding surface side of the upper wall 61 of the base 10 and above the ventilation hole 10a. Further, by sandwiching the sheet-like member 91 between the upper wall 61 of the base 10 and the in-situ foam heat insulating material 89, the sprayed in-situ foam heat insulating material 89 can be removed, so that the maintainability of the flow channel pipe 51 and the like can be improved. .

  FIG. 9 is a side view showing another embodiment of the water supply apparatus 1. Since the configuration and operation of the present embodiment that are not particularly described are the same as those of the embodiment shown in FIG. 7 described above, redundant description thereof is omitted. The water supply apparatus 1 of this embodiment further includes a plurality of (four in this embodiment) height adjustment members 90 that support the base 10 and the lid member 55. The height adjusting members 90 are respectively attached to the bottoms of the four leg portions 83 connected to the lid member 55. Each height adjustment member 90 is composed of a screw, and the height of the base 10 can be adjusted by rotating the height adjustment member 90. In order to prevent cold air from staying in the base 10, the height adjusting member 90 is preferably an elongated member such as a screw or a bolt.

  The pump 2 of the water supply apparatus 1 according to the present embodiment is a cascade pump. This type of pump 2 is configured such that its impeller 15 (see FIG. 3) is movable in the axial direction. This is to prevent rotation of the impeller 15 from stopping even if foreign matter is mixed in the water. However, if the entire water supply apparatus 1 is inclined, a part of the impeller 15 may come into contact with the casing 6 when the pump 2 is stopped. If a part of the impeller 15 is in contact with the casing 6 and the stop time is extended for a long time, the contact portion rusts and adheres, and there is a risk of starting failure when the pump 2 is started next time. . The height adjusting member 90 described above can install the base 10 horizontally even if the installation location is uneven, and as a result, it is possible to prevent the pump 2 from starting poorly.

  FIG. 10 is an enlarged cross-sectional view showing another embodiment of the height adjusting member 90. In this embodiment, four bottom plates 93 are fixed to the four leg portions 83 connected to the lid member 55, respectively. Each bottom plate 93 projects outward from the base 10. The height adjusting member 90 is attached to a portion protruding from the base 10 of the bottom plate 93. Each height adjusting member 90 includes a bolt 95 and at least two nuts 96. The bolt 95 passes through the bottom plate 93, and the nut 96 is screwed to the bolt 95 so as to sandwich the bottom plate 93.

  FIG. 11 is an enlarged cross-sectional view showing another embodiment of the height adjusting member 90. In this embodiment, the fastener 68 for fixing the lid member 55 to the base 10 also functions as a height adjusting member. Each fastener 68 is formed of a screw, and a lower portion (head portion of the screw) of the fastener 68 protrudes downward from the leg portion 83. The fastener 68 extends through the lid member 55 and the leg portion 83, and is screwed into a screw hole 97 formed in the lower surface 63 a of the step portion 63 of the base 10. In the present embodiment, a heat insulating material 88 is disposed on the upper surface of the lid member 55, and the fastener 68 extends through the heat insulating material 88.

  FIG. 12 is an enlarged cross-sectional view showing another embodiment of the fastener 68. In this embodiment, the fastener 68 includes a claw 98 provided on the lid member 55. A hole 99 is formed in the side wall 62 of the base 10. The claw 98 is inserted into the hole 99 and engaged with the side wall 62 of the base 10. The claw 98 is formed integrally with the lid member 55 by synthetic resin. The claw 98 can be bent to some extent. The lid member 55 can be removed from the base 10 by releasing the engagement between the claw 98 and the side wall 62 of the base 10.

  Each embodiment of the height adjusting member 90 described above can also be applied to the embodiments shown in FIGS. 4 and 12.

  Although the embodiment described so far is the water supply apparatus 1 including the self-priming pump 2 composed of the cascade pump, the present invention is also applied to the water supply apparatus including the submersible pump as shown in FIG. Can do. The water supply apparatus shown in FIG. 13 includes a submersible pump 101 that is separated from the main body 100. The submersible pump 101 includes a pump 102 and an electric motor 103, and an impeller (not shown) of the pump 102 is driven by the electric motor 103. The submersible pump 101 is installed in a water source such as a well. The submersible pump 101 is connected to the casing 6 of the main body 100 through a pumping pipe 107. A chamber 6 d through which water pressurized by the impeller of the pump 102 flows is formed in the casing 6. One end of the channel pipe 51 is connected to a fluid outlet 6 b formed in the lower part of the casing 6, and the opening end of the channel pipe 51 is closed by a drain plug 70.

  FIG. 14 is a diagram showing the main body 100. The same components as those of the above-described embodiment are denoted by the same reference numerals, and redundant description thereof is omitted. The main body 100 includes a check valve (small water amount detector) 14, a casing 6, a pressure sensor 11, a pressure tank 9, an inverter 7, a control unit 13 (not shown in FIG. 14), a flow channel 51, a drain Components such as the plug 70, the base 10, the cover 12, and the lid member 55 are provided. The check valve 14, the pressure sensor 11, and the pressure tank 9 are attached to the casing 6. Each embodiment shown in FIGS. 1 to 12 can also be applied to a water supply device of the type shown in FIGS. 13 and 14.

  The embodiment described above is described for the purpose of enabling the person having ordinary knowledge in the technical field to which the present invention belongs to implement the present invention. Various modifications of the above embodiment can be naturally made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. Accordingly, the present invention is not limited to the described embodiments, but is to be construed in the widest scope according to the technical idea defined by the claims.

DESCRIPTION OF SYMBOLS 1 Water supply apparatus 2 Pump 3 Electric motor 6 Casing 7 Inverter 9 Pressure tank 10 Base 10a Ventilation hole (handle)
11 Pressure sensor 12 Cover 13 Control unit 14 Check valve 15 Impeller 18 Suction port 19 Discharge port 20 Inlet tube 21 Outlet tube 23 Impeller chamber 26 Suction chamber 27 Gas-liquid separation chamber 29 Cap 30 Suction channel 31 Discharge channel 35 Baffle 51 Channel pipe 55 Lid member (heat insulation member)
61 Upper wall 62 Side wall 63 Step part 65 Space 68 Fastener 70 Drain plug 71 Through hole 73 Screw hole 83 Leg part 88 Insulation material 89 In-situ foam insulation material 90 Height adjusting member 91 Sheet-like member 93 Bottom plate 95 Bolt 96 Nut 97 Screw hole 98 Claw 99 Hole 100 Main body 101 Submersible pump 102 Pump 103 Electric motor 107 Pumping pipe

Claims (7)

An impeller for pressurizing water;
An electric motor for rotating the impeller;
A casing through which water pressurized by the impeller flows;
A base for partitioning the installation surface of the water supply device;
A pressure tank disposed above the base and communicating with the casing;
Comprising a heat insulating member disposed below the upper wall of the base;
At least two ventilation holes are formed in the side wall of the base,
The water insulating device, wherein the heat insulating member is located above the ventilation hole.   The water supply device according to claim 1, wherein the heat insulating member is a lid member fixed to the base.   The water supply device according to claim 1, wherein the heat insulating member is an in-situ foam heat insulating material in close contact with the base.   The water supply apparatus according to claim 1, further comprising a heat insulating material disposed between the upper wall of the base and the heat insulating member.   The water supply apparatus according to any one of claims 1 to 4, further comprising a height adjusting member that supports the base and the heat insulating member.   The water supply device according to claim 5, wherein a leg portion is connected to the heat insulating member, and the height adjusting member is attached to the leg portion.   The water supply device according to any one of claims 1 to 6, wherein the base is made of a synthetic resin.

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