JP6892291B2 - Water supply device - Google Patents

Description

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

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

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

FIG. 16 is a schematic view showing the structure of the water supply device 200 shown in FIG. The water supply device 200 includes a base 208 made of synthetic resin, a pump 210 for pressurizing water, an electric motor 211 for rotating 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 divided 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 the compressed air acts on the water in the liquid chamber 218. In the water supply device 200, when the faucet 207 is closed and the water is no longer used, the pump 210 is stopped. By accumulating pressure in the pressure tank 213 before stopping the pump 210, the pressure of the water pressurized by the pump 210 is held by the pressure tank 213.

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

A flow path tube 220 is arranged in the base 208. The flow path pipe 220 is used as a drain pipe for draining water in the water supply device 200 when the pump 210 is not operated for a long time, or as a spare discharge pipe for changing the water discharge direction. Is also used. Normally, the open end of the flow path pipe 220 is closed with a drain plug 221. A plurality of notches 208a (in the figure, only one notch 208a is shown) are formed on the side wall of the base 208, which functions as a handle for making the entire water supply device 200 portable. Further, since the water supply device 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.

Japanese Unexamined Patent Publication No. 2004-84507

As shown in FIG. 15, the water supply device 200 is usually 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, if the cold air of the foundation 222 rises in the base 208 and comes into contact with the flow path pipe 220 and there is no use of water such as at midnight, the water in the flow path pipe 220 freezes. The notch 208a formed in the base 208 forms a path for the outside air and has a role of letting the cold air trapped in the base 208 escape to the outside. However, since the flow path pipe 220 is arranged at a position higher than the notch 208a, the flow of the outside air does not allow the cold air around the flow path pipe 220 to escape to the outside so much. In particular, when there is no wind or a weak wind, the flow of outside air is not formed in the base 208, and the cold air from the foundation 222 stays in the base 208, and as a result, the water in the flow path pipe 220 freezes.

The flow path tube 220 is made of metal, while the base 208 is made of synthetic resin. Synthetic resin has low ductility at temperatures such as freezing outdoors, and is vulnerable to impact due to expansion during freezing of water. Therefore, when the water in the flow path pipe 220 freezes, the portion of the base 208 in contact with the flow path pipe 220 may be damaged by the impact at the time of freezing in the flow path pipe 220.

Further, since the water supply device 200 described above is installed at home, weight reduction is required. Therefore, synthetic resin may be used for the wetted parts (piping, casing (not shown), etc.) which are the flow paths of the liquid handled by the pump 210. Normally, the above-mentioned wetted parts are filled with a handling liquid (water) so that the pump 210 does not suck air during operation. As described above, when the cold air from the foundation 222 stays in the base 208, the base 208 is cooled, and the entire inside of the cover 212 is further cooled, the synthetic resin part of the wetted part is formed by freezing water (handling liquid). There is a risk of damage.

In cold regions, a heater that operates when the temperature drops can be attached to the flow path pipe 220 to prevent water from freezing. Further, when the pump 210 is not used for a long period of time, the water in the wetted portion can be prevented from being damaged due to freezing by draining the water in the pump 210. However, even in a warm area where freezing cannot be predicted, if the above-mentioned installation environment and adverse conditions such as cold waves due to recent abnormal weather overlap, the water in the water supply device 200 freezes and comes into contact with resin. The liquid part may be damaged.

Therefore, an object of the present invention is to provide a water supply device capable of preventing freezing of water in the water supply device due to cold air from the installation surface.

In order to achieve the above-mentioned object, one aspect of the present invention includes an impeller for pressurizing water, an electric motor for rotating the impeller, and a casing in which water pressurized by the impeller flows inside. A base for partitioning the installation surface of the water supply device, a pressure tank arranged above the base and communicating with the casing, and a heat insulating member arranged below the upper wall of the base. the base of the side wall, at least two air vents are formed, the heat insulating member is located above the said vent hole, said heat insulating member, wherein the cover member der Rukoto fixed to the base It is a water supply device.

A preferred embodiment of the present invention is further provided with a heat insulating material arranged between the upper wall of the base and the heat insulating member.
A preferred embodiment of the present invention is further provided with a height adjusting member for supporting the base and the heat insulating member.
A preferred embodiment of the present invention is characterized in that a leg portion is connected to the heat insulating member, and the height adjusting member is attached to the leg portion.
A preferred embodiment of the present invention is characterized in that the base is made of a synthetic resin.

According to the present invention, since the cold air from the installation surface is blocked by the heat insulating member, it is possible to prevent the water in the water supply device from freezing. Further, since the heat insulating member is located above the ventilation hole of the base, the cold air in the base can escape to the outside from the ventilation hole.

It is a perspective view of the water supply device which concerns on one Embodiment. It is a top view of the water supply device when the cover is removed. It is a vertical sectional view of the water supply device shown in FIG. It is a side view of the water supply device shown in FIG. It is a figure which shows the state which the fastener and the lid member were removed from a base. It is a top view of the lid member. It is a side view which shows the other embodiment of a water supply device. It is a side view which shows the other embodiment of a water supply device. It is a side view which shows the other embodiment of a water supply device. FIG. 5 is an enlarged cross-sectional view showing another embodiment of the height adjusting member. FIG. 5 is an enlarged cross-sectional view showing another embodiment of the height adjusting member. FIG. 5 is an enlarged cross-sectional view showing another embodiment of the fastener. It is a schematic diagram which shows the water supply device provided with the submersible pump. It is a figure which shows the main body part of the water supply device shown in FIG. It is a schematic diagram which shows the self-priming type water supply device. It is a schematic diagram which shows the internal structure of the water supply device shown in FIG.

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

As shown in FIG. 1, the water supply device 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, operation of the pump 2). It includes a control unit 13 that controls the pump 2, a pressure tank 9 that holds the pressure of water while the pump 2 is stopped, and a base 10 on which the pump 2, the motor 3, and the inverter 7 are arranged. In the present embodiment, the control unit 13 is arranged inside the inverter 7, but may be arranged outside the inverter 7. The inverter 7 is connected to the motor 3 by an electric cable (not shown). The control unit 13 transmits a command value of the target rotation speed to the inverter 7, and the inverter 7 is configured to rotate the electric motor 3 at the target rotation speed. Further, if it is not necessary to control the pump 2 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. Further, as one embodiment, the electric motor 3 and the pressure tank 9 are fixed to the pump 2. The water supply device 1 further includes a cover 12 that houses a pump 2, an electric motor 3, a pressure tank 9, and an inverter 7 (and a control unit 13). The cover 12 is detachably attached to the base 10.

FIG. 2 shows a top view of the water supply device 1 when the cover 12 is removed. As shown in FIG. 2, by arranging the pump 2, the motor 3, the pressure tank 9, and the inverter 7 (and the control unit 13) on the projection plane of the base 10 and above the base 10, the base 10 The installation surface of the water supply device 1 can be partitioned. Further, the cover 12 plays a role of protecting 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 motor 3 and the pressure tank 9 may be separated from the installation surface by the base 10 without being fixed to the pump 2. Specifically, as long as the motor 3 and the pressure tank 9 are arranged above the base 10 and housed in the cover 12, their positions and fixing methods are not particularly limited.

The water supply device 1 has a suction port 18 to which a suction pipe extending from a water source (for example, see reference numeral 202 in FIG. 15) is connected, and a water distribution pipe (for example, see 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 the inlet pipe 20 connected to the suction side of the pump 2, and the discharge port 19 is provided in the outlet pipe 21 connected to the discharge side of the pump 2.

FIG. 3 is a vertical cross-sectional view of the water supply device 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 rotation 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 self-priming property, it is suitable for pumping water stored in a water source having a water surface lower 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 located upstream of the impeller chamber 23 and a gas-liquid separation chamber 27 located 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 flow path 30 communicating with the suction port 18 (see FIG. 1) is provided upstream of the suction chamber 26, and communicates with the discharge port 19 (see FIG. 1) downstream of the gas-liquid separation chamber 27. A discharge flow path 31 is provided. The casing 6 has a fluid inlet 6a and a fluid outlet 6b below it. The fluid inlet 6a of the casing 6 is connected to the inlet pipe 20 having the suction port 18 shown in FIG. 1, and the fluid outlet 6b of the casing 6 is connected to the outlet pipe 21 having the discharge port 19 shown in FIG.

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

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

In the present embodiment, the check valve 14 not only has a function of preventing backflow of water, but also has a function of a small amount of water detector for detecting 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 drops to a predetermined small amount of water, the check valve 14 issues 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 amount of water 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 retainer for holding the pressure of the water pressurized by the impeller 15, and the pressure of the water is held by the pressure tank 9 while the pump 2 is stopped. The pressure tank 9 is located downstream of the impeller 15 and the impeller chamber 23. Since the configuration of the pressure tank 9 is the same as that of the pressure tank 213 shown in FIG. 16, the overlapping description thereof will be omitted.

Before the pump 2 is first operated, with the pump 2 stopped, the cap 29 is removed from the priming inlet 6c formed on the upper part of the casing 6, and the suction chamber 26, the impeller chamber 23, and the impeller chamber 23 are removed through the priming inlet 6c. And water is supplied to the gas-liquid separation chamber 27. The water supplied from the priming inlet 6c is referred to as "priming water". When the priming water is supplied to the suction chamber 26, the impeller chamber 23, and the gas-liquid separation chamber 27, the valve body 14a of the check valve 14 is fixed to the downstream end of the suction flow path 30 by its own weight. It is pressed against the valve seat 14c. Therefore, it is prevented that the priming water flows back from the suction chamber 26 to the suction flow path 30. After the priming water supply is complete, the priming inlet 6c is closed by the cap 29.

Subsequently, when the impeller 15 is rotated by the drive of 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 opens), so that the air in the suction pipe 202 (see FIG. 15) is sucked into the suction flow path. It flows into the impeller chamber 23 through the 30 and the suction chamber 26. 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 on which the fluid discharged from the impeller chamber 23 collides. When the pump 2 is performing 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 gas-liquid separation chamber 27 through the discharge flow path 31 and from the discharge port 19 of the water supply device 1. Water is returned to the impeller chamber 23 through the circulation hole 28 formed in the lower part of the gas-liquid separation chamber 27. The water returned to the impeller chamber 23 is remixed with the air flowing into the suction chamber 26. By repeating such an operation, the air existing 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.

A pressure sensor 11 for measuring the pressure of the fluid in the gas-liquid separation chamber 27, that is, the pressure on the discharge side is connected to the upper part of the gas-liquid separation chamber 27. During the self-priming operation, the only fluid existing in the upper part of the gas-liquid separation chamber 27 is air, and the measured value of the pressure is approximately 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 wetted parts in the water supply device 1, and a part or all of them may be molded of synthetic resin.

The pressure sensor 11 is connected to the control unit 13 via a signal line (not shown). The control unit 13 determines the operating speed of the pump 2 during the pumping operation based on the pressure signal output from the pressure sensor 11. That is, the rotation speed of the impeller 15) is controlled. In general, constant discharge pressure control that controls the operating speed of the pump 2 so that the discharge pressure of the pump 2 matches the target pressure, or water pressure at the end of a faucet or other faucet by appropriately changing the target pressure. Estimated end pressure constant control is performed. 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 the 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 operating speed of the pump 2. A command is issued to the inverter 7, the pressure is accumulated 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 the water existing in the casing 6 from flowing back, and can store the water in the casing 6. If water is used in the building while the pump 2 is stopped, first, the water whose pressure is held in the pressure tank 9 is sent into the building. After that, when the pressure on the discharge side of the pump 2 drops to a preset starting pressure, the pump 2 is started, and the operation of the pump 2 (“constant pressure control” or “estimated constant end pressure control” described above) causes the pump 2. Water is transferred to the building. After that, when the amount of water used in the building decreases during the operation of the pump 2, the small amount of water stops. In this way, the operation of the pump 2 (“constant pressure control” or “constant control of estimated terminal pressure”, etc.) and the stoppage of a small amount of water in accordance with the use of water in the building are called automatic water supply operation.

FIG. 4 is a side view of the water supply device 1 shown in FIG. FIG. 4 shows a cross section of the base 10. The water supply device 1 includes a flow path pipe 51 communicating with the discharge side of the casing 6, a drain plug 70 detachably attached to the open end of the flow path pipe 51, and a lid member 55 fixed to the base 10. Further prepared. The base 10 has a hollow shape in which the lower end thereof is open. In the present embodiment, the base 10 seen 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 forming the lid member 55 may be of the same type or different types.

The flow path 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 on which the pump 2, the inverter 7, and the like are installed, and the flow path pipe 51 is the upper wall of the base 10. It is fixed at 61. The flow path pipe 51 fluidly communicates with the discharge side of the pump 2. Therefore, the pressure of the water pressurized by the pump 2 acts on the flow path pipe 51, but as long as the open end of the flow path pipe 51 is closed by the drain plug 70, the pressurized water flows. It is not discharged from the road pipe 51. When the water supply device 1 is not operated for a long period of time, the water remaining in the water supply device 1 can be discharged by removing the drain plug 70 from the flow path pipe 51. In this way, the flow path pipe 51 not only functions as a drainage pipe, but also by changing the attachment position of the drainage plug 70 from the open end of the flow path pipe 51 to the discharge port 19 shown in FIG. The open end of the pipe 51 can be used as a discharge port.

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

The base 10 has an upper wall 61 on which a pump 2, an inverter 7, and the like are installed, and a side wall 62 extending downward from the entire edge of the upper wall 61. In order to make the entire water supply device 1 easy to carry, the two side walls 62 of the base 10 are each provided with two ventilation holes 10a 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 composed of a notch formed in the side wall 62 of the base 10, but may be a hole having a size capable of functioning as a handle.

Steps 63 are provided on the lower side of the upper wall 61 and on the inside 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 path pipe 51. The step portion 63 has a horizontal lower surface 63a, and the lid member 55 is fixed to the lower surface 63a 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 portion 63 are integrally formed of synthetic resin. In one embodiment, the step 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 arranged below the upper wall 61 of the base 10 and is arranged 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 by the fastener 68 in a state of being in contact with the step portion 63 of the base 10. The lid member 55 is located below the flow path 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 path pipe 51 is arranged in this 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 flow path pipe 51 is covered with a lid member 55. The space 65 may be a closed space or an unclosed space.

The lid member 55 has a side surface having a shape along the inner surface surface of the base 10. A plurality of (four in this embodiment) legs 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 83 are integrally formed of a synthetic resin such as polypropylene. The screw holes 73 are 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 the passage of the outside air is formed in the base 10 as shown by the arrow in FIG. doing.

The fastener 68 extends through the base 10 and the lid member 55, and the tip of the fastener 68 is fitted to the leg 83. Screws, screws, bolts, and the like are used for the fastener 68 that fixes 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 diagram 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 is opened on the upper surface of the base 10, and the other end of the through hole 71 is opened on the lower surface 63a of the step portion 63 of the base 10. In the present embodiment, the base 10 viewed from above has a rectangular shape, and four through holes 71 are formed at the four corners of the base 10. An open 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 seen from above has a rectangular shape. The open ends of the screw holes 73 described above are formed at the four corners of the lid member 55. Further, the lid member 55 is an example of a heat insulating member, and may be molded of a synthetic resin or the like having a low thermal conductivity. Further, a part of the lid member 55 may be formed by using a heat insulating material, a non-woven fabric, or the like. The lid member 55 may function as a heat insulating member and can block cold air from the installation surface.

According to the present embodiment, a lid member 55, which 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), and freezes water in the flow path pipe 51 or water in the wetted portion of the liquid handled by the pump 2. It is possible to prevent freezing. Further, it is possible to prevent water intrusion, insects, slugs and the like from entering through the ventilation holes 10a. Although not shown, a heater that operates when the temperature drops may be installed in the space 65 (for example, the flow path pipe 51). By doing so, it is possible to prevent the heat of the heater from escaping from the ventilation hole 10a, and it is possible to effectively prevent freezing in the water supply device 1 with a smaller heat source.

FIG. 7 is a side view showing another embodiment of the water supply device 1. Since the configuration and operation of the present embodiment not particularly described are the same as those of the above-described embodiments shown in FIGS. 1 to 6, the duplicate description thereof will be omitted. In the present embodiment, the water supply device 1 further includes a heat insulating material 88 arranged in the space 65 between the lid member 55 which is a heat insulating member and the upper wall 61 of the base 10. In this embodiment, the heat insulating material 88 is arranged on the upper surface of the lid member 55. The heat insulating material 88 preferably covers the entire upper surface of the lid member 55. The heat insulating material 88 is sandwiched between the lower surface 63a of the step 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, a fiber-based heat insulating material such as glass wool, rock wool, and cellulose fiber.

The heat insulating material 88 arranged on the lid member 55 prevents the temperature in the space 65 between the lid member 55 and the base 10 from dropping, and the resin wetted portion and the wetted portion made of resin due to freezing of the liquid in the water supply device 1. It is possible to make sure that the resin parts in contact with the wetted parts are damaged. Further, the heat insulating material 88 also functions as a cushioning material, can prevent the vibration of the pump 2 from being transmitted to the lid member 55, and can prevent the fastener 68 from loosening.

As shown in FIG. 8, in-situ foam heat insulating material 89 such as sprayed urethane foam heat insulating material may be used in place of or in addition to the lid member 55 which is the heat insulating member described above. Since the base 10 has a complicated shape in order to reinforce the flow path pipe 51 and the strength, if the on-site foamed heat insulating material 89 is sprayed into close contact with the upper wall 61 of the base 10, the heat insulating effect can be further improved. Can be done. In this case, it is preferable to spray the on-site foam insulation material 89 on the ground contact surface side of the upper wall 61 of the base 10 and above the ventilation hole 10a. Further, by sandwiching the sheet-shaped member 91 between the upper wall 61 of the base 10 and the on-site foamed heat insulating material 89, the sprayed on-site foamed heat insulating material 89 can be removed, so that the maintainability of the flow path pipe 51 and the like can be improved. ..

FIG. 9 is a side view showing another embodiment of the water supply device 1. The configuration and operation of the present embodiment, which are not particularly described, are the same as those of the embodiment shown in FIG. 7 described above, and thus the duplicate description thereof will be omitted. The water supply device 1 of the present embodiment further includes a plurality of height adjusting members 90 (four in the present embodiment) that support the base 10 and the lid member 55. The height adjusting member 90 is attached to the bottom of each of the four legs 83 connected to the lid member 55. Each height adjusting member 90 is composed of screws, and the height of the base 10 can be adjusted by rotating the height adjusting 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 device 1 according to the present embodiment is a cascade pump. The impeller 15 (see FIG. 3) of this type of pump 2 is configured to be movable in the axial direction. This is to prevent the impeller 15 from stopping even if foreign matter is mixed in the water. However, if the entire water supply device 1 is tilted, a part of the impeller 15 may come into contact with the casing 6 when the pump 2 is stopped. If the stop time is long with a part of the impeller 15 in contact with the casing 6, the contact portion will rust and stick, and the next time the pump 2 is started, a start failure may occur. .. 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, the four bottom plates 93 are fixed to the four legs 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 of the bottom plate 93 protruding from the base 10. Each height adjusting member 90 includes a bolt 95 and at least two nuts 96. The bolt 95 penetrates the bottom plate 93, and the nut 96 is screwed into 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 composed of a screw, and the lower portion (head of the screw) of the fastener 68 projects downward from the leg 83. The fastener 68 extends through the lid member 55 and the leg portion 83, and is screwed into the screw hole 97 formed in the lower surface 63a of the step portion 63 of the base 10. In the present embodiment, the heat insulating material 88 is arranged 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 is composed of claws 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 integrally formed with the lid member 55 by a synthetic resin. The claw 98 can be bent to some extent. The lid member 55 can be removed from the base 10 by disengaging the claws 98 from the side wall 62 of the base 10.

It should be noted that each embodiment of the height adjusting member 90 described above can also be applied to the embodiments shown in FIGS. 4 and 12.

The embodiment described so far is a water supply device 1 including a self-priming pump 2 composed of a cascade pump, but the present invention is also applied to a water supply device including a submersible pump as shown in FIG. Can be done. The water supply device shown in FIG. 13 includes a submersible pump 101 separated from the main body 100. The submersible pump 101 has a built-in 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 via a pumping pipe 107. A chamber 6d through which water pressurized by the impeller of the pump 102 flows is formed in the casing 6. One end of the flow path pipe 51 is connected to a fluid outlet 6b formed in the lower part of the casing 6, and the open end of the flow path pipe 51 is closed by a drain plug 70.

FIG. 14 is a diagram showing the main body 100. The same components as those in the above-described embodiment are designated by the same reference numerals, and the duplicated description thereof will be omitted. The main body 100 includes a check valve (small amount of water 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 path pipe 51, and a drainage pipe. It includes components such as a stopper 70, a base 10, a cover 12, and a lid member 55. 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 the type of water supply device shown in FIGS. 13 and 14.

The above-described embodiment is described for the purpose of enabling a person having ordinary knowledge in the technical field to which the present invention belongs to carry out 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. Therefore, the present invention is not limited to the described embodiments, but is construed in the broadest range according to the technical idea defined by the claims.

1 Water supply device 2 Pump 3 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 pipe 21 Outlet pipe 23 Impeller chamber 26 Suction chamber 27 Gas-liquid separation chamber 29 Cap 30 Suction flow path 31 Discharge flow path 35 Baffle 51 Flow tube 55 Lid member (insulation member)
61 Upper wall 62 Side wall 63 Step 65 Space 68 Fastener 70 Drain plug 71 Through hole 73 Screw hole 83 Leg 88 Insulation material 89 In-situ foam insulation 90 Height adjustment 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 Water pumping pipe

Claims (5)

An impeller for pressurizing water and
An electric motor that rotates the impeller and
A casing through which water pressurized by the impeller flows inside,
A base for partitioning the installation surface of the watering system and
A pressure tank located above the base and communicating with the casing,
It has a heat insulating member arranged below the upper wall of the base.
At least two ventilation holes are formed on the side wall of the base.
The heat insulating member is located above the ventilation hole and is located above the ventilation hole .
The heat insulating member, a water supply device, wherein the lid member der Rukoto fixed to the base. The water supply device according to claim 1, further comprising a heat insulating material arranged between the upper wall of the base and the heat insulating member. The water supply device according to claim 1 or 2 , further comprising a height adjusting member for supporting the base and the heat insulating member. The water supply device according to claim 3 , 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 4 , wherein the base is made of a synthetic resin.

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