JP4157432B2 - Independent operation bypass piping unit and independent operation pump device with the bypass piping unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bypass piping unit used in, for example, a water supply apparatus and a pump device for independent operation with the bypass piping unit.
[0002]
[Prior art]
In apartment buildings such as apartments and condominiums, a pump device for water supply is connected between the water pipe extending from the main water pipe and the water supply pipe connected to the household faucet, and the pressure water from the water pipe is directly pumped by the pump device. The pressure is increased and supplied to the home (direct water supply type).
[0003]
The pump device used for such water supply is supplied with pressure water directly from the water pipe at high water distribution, that is, when the required water pressure is secured by the pressure of the water pipe (when the pushing pressure is sufficiently high). In order to be able to guide to the pipe, a bypass pipe structure is assembled on the suction / discharge port side.
[0004]
Conventionally, the bypass piping structure is provided with a general-purpose three-way valve between each suction port and suction header pipe of each pump unit equipped with a plurality of pumps, and between each discharge port and discharge header pipe. A structure in which a bypass pipe is assembled between the discharge header and a general-purpose check valve (backflow prevention device) is connected to the middle of the bypass pipe and the inlet of the suction header is used (see, for example, Patent Document 1). . As a result, the pump device can be operated alternately (by switching the flow path using a three-way valve), and when the suction pressure of the pump device exceeds the target pressure while preventing backflow from the pump device, the pressure water from the water pipe is bypassed. Bypass to the discharge side through the passage.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-164606
[Problems to be solved by the invention]
Even in detached houses, there are many places where water is used on the upper floor, and in the same way as described above, there are many cases where water is supplied by increasing the pressure water from the water pipe using the direct water supply system.
[0007]
In many detached houses, pipes and equipment attached to pipes are laid in a limited space in as little space as possible, so a pump device with a compact outer shape, that is, a pump device that supplies water by operating a single pump, especially suction A single operation pump unit in which the mouth and the discharge port are arranged in parallel in the same direction is often used.
[0008]
By the way, the above-described conventional bypass piping structure is a structure in which general-purpose three-way valves, piping members, and check valves are connected. Moreover, the outer shape of the general-purpose check valve is quite large. For this reason, the whole structure tends to be large and complicated due to the structure.
[0009]
In the case of a detached house, such a bypass piping structure is assembled to the above-described single operation pump unit. Usually, the suction port and the discharge port of the single operation pump unit are relatively close to each other. Therefore, the bypass piping structure cannot be directly connected to the suction port and the discharge port. For this reason, in the case of a detached house, the bypass piping structure is forced to be installed separately from the pump of the pump unit for independent operation and connected to the pump indirectly.
[0010]
For this reason, the bypass piping structure has a drawback that the pump unit is complicated or large.
[0011]
Therefore, an object of the present invention is to provide a compact and simple bypass pipe unit suitable for a single operation pump unit in which the suction port and the discharge port are arranged in the same direction, and a single operation with the bypass pipe unit. It is to provide a pump.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 corresponds to the suction port and the discharge port that are arranged in parallel in the same direction of the pump unit for single operation. Connectable suction-side three-way valve and discharge-side discharge valve are arranged, and the third ports of the suction-side and discharge-side three-way valves are extended to the other side, and both ends are inserted and bypassed. The structure which united the check valve part in the bypass path and the inlet part of the suction side three-way valve connected to the inlet of the pump unit was adopted.
[0013]
With this configuration, the bypass path is a structure that utilizes a part of the three-way valve that can be connected to the suction port and discharge port of the single operation pump unit, and is formed between the suction port and discharge port of the single operation pump unit. Is done. In addition, the check action is ensured in the check valve portion housed in the bypass passage and the mouth portion formed by a part of the three-way valve.
[0014]
Therefore, the bypass piping unit has a structure suitable for a single operation pump unit, that is, can be directly connected to a single operation pump unit, unlike a structure in which a general-purpose piping member or check valve is combined. A simple structure with excellent space and a compact structure.
[0015]
In the invention according to claim 2, in addition to the above object, the bypass passage is formed by the shortest path connecting the suction side three-way valve and the discharge side three-way valve with the shortest distance so that the structure is as compact as possible.
[0016]
In addition to the above object, the invention according to claim 3 further includes a first check valve portion of the bypass passage so that the compactness is not impaired even if the pump unit for independent operation is controlled by detecting the suction pressure. An installation seat on which the pressure detector can be installed is formed on the wall of the mouth that forms the flow path from the suction side to the suction side three-way valve.
[0017]
According to a fourth aspect of the present invention, there is provided an independent operation pump unit having a suction port and a discharge port arranged in parallel in the same direction so as to provide a more compact isolated operation pump device. In addition, a configuration in which the bypass piping unit for independent operation according to any one of claims 3 is assembled is adopted.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.
[0019]
FIG. 1A is a side sectional view of an independent operation pump device P used for, for example, domestic water supply, FIG. 1B is a partial front view of the device P, and FIG. 2 is a plan sectional view of the device P. FIG. 3 shows a schematic configuration of the apparatus P.
[0020]
In the drawings, reference numeral 1 denotes a single operation pump unit (hereinafter simply referred to as a pump unit). The pump unit 1 includes, for example, a rectangular pump base 2 and a vertical pump 5 (one unit) in which a motor 3 and a pump unit 4 are directly connected, an accumulator 6, a control panel 7 including an electrical box, and the like. The structure is used. A suction port portion 8 that continues from the pump portion 4 extends toward one side of the base 2, and an end portion is opened at a point closer to one side of the same side. This end is formed in a flange shape, for example. The laterally open end forms a suction port 9 that opens in the lateral direction. Further, the discharge port portion 10 continuing from the pump portion 4 also extends toward one side of the base 2 and opens an end at a point closer to the other side of the same side. This end is formed in a flange shape, for example. A discharge port 11 disposed in parallel with the suction port 9 is formed by the laterally open end. The accumulator 6 communicates with a discharge flow path formed by the discharge port 10. Further, as shown in FIGS. 1 to 3, a pressure detector 12 for detecting the discharge pressure in the flow path (shown only in FIG. 3: discharge side pressure) Detector) and a flow rate detection detector 13 (discharge side flow rate detector) for detecting the discharge flow rate. The control panel 7 has a function of controlling the capacity of the pump 5 by controlling the motor 3 according to the detection information from the pressure detector 12 and the flow rate detector 13. The periphery of each device on the pump base 2 is covered with a pump cover 14.
[0021]
A bypass piping unit 16 is directly connected to the suction port 9 and the discharge port 11 facing in the same direction of the pump unit 1.
[0022]
The structure of the bypass piping unit 16 will be described. 20 is a suction side three-way valve arranged according to the position where the suction port 9 is provided, and 21 is a discharge side three-way valve arranged according to the point where the discharge port 11 is provided. is there.
[0023]
Of the three-way valves 20, 21 arranged corresponding to the suction port 9 and the discharge port 11, the suction-side three-way valve 20 is, for example, a valve chamber 23 a formed by a valve housing 23 as shown in FIGS. 2 and 3. A structure in which a ball-shaped valve body 24 is accommodated (shown only in FIG. 3) is used. Specifically, a port portion 25 (corresponding to the second suction port portion of the present application) protruding from the valve housing 23 toward the suction port 9 in a short tubular shape is formed. The mouth portion 25 communicates with the valve chamber 23a. The end portion of the mouth portion 25 is opened, for example, in a flange shape, and forms an outlet on the suction side combined with the suction port 9. Further, in the valve housing 23, from the opposite side of the mouth 24 and the valve chamber 23a, for example, from the portion of the valve housing 23 that is opposite by 180 °, a mouth 26 extending in the same direction (in the first suction mouth of the present application). Equivalent) is formed. At the tip of the mouth portion 26, for example, a cylindrical fastening component 28 having a threaded portion 27 formed on the inner surface is fixed, and a suction-side inlet 29 that can be connected to a water pipe (not shown) is formed. ing. The mouth portion 26 communicates with the valve chamber 23a. Further, an intermediate port 30 (in the third port) extending from the middle between the inlet 29 and the outlet, for example, from the portion on the discharge side three-way valve 21 side of the valve housing 23 toward the discharge side three-way valve 21 as a counterpart. Equivalent) is formed. The mouth portion 30 communicates with the valve chamber 23a. On the other hand, as shown in FIG. 3, a T port 31 is formed inside the valve body 24 to allow communication between the mouth portions 25, 26, and 30. Further, the valve body 24 is connected to a valve operation part, for example, an I-shaped operation handle 32 disposed outside the valve housing 23, for example, directly above the valve housing 23, and is manually operated clockwise or counterclockwise by the operation handle 32. By switching the direction, the flow path connecting the mouth portions 25, 26, and 30 as shown in FIG. 3 is switched (corresponding to the first mode of the present application), or the mouth as shown in FIG. The structure is such that the switching of the flow path communicating only between the portion 26 and the mouth portion 30 (corresponding to the second mode of the present application) is performed.
[0024]
Similarly to the suction-side three-way valve 20, the discharge-side three-way valve 21 has a ball-like valve body in a valve chamber 33a (shown only in FIG. 3) formed by, for example, a valve housing 33 as shown in FIGS. A structure containing 34 is used. The discharge side three-way valve 21 has the same structure as the suction side three-way valve 20. Specifically, a port portion 35 (corresponding to the first discharge port portion of the present application) protruding from the valve housing 33 toward the discharge port 11 in a short tubular shape is formed. The end portion of the mouth portion 35 is opened in a flange shape, for example, and forms a discharge-side inlet that is combined with the discharge port 11. Further, the valve housing 33 has a mouth portion 36 extending in the same direction from the portion of the valve housing 33 opposite to the mouth portion 35 and the valve chamber 33a, for example, 180 ° opposite (in the second discharge mouth portion of the present application). Equivalent) is formed. For example, a cylindrical fastening part 38 having a threaded portion 37 formed on the inner surface is fixed to the distal end portion of the mouth portion 36, and discharge that can be connected to a water supply pipe (not shown) connected to a household faucet. A side outlet 39 is formed. Further, an intermediate port 40 (into the third port) extending from the intermediate portion between the inlet and the outlet 39, for example, from the portion on the suction side three-way valve 20 side of the valve housing 33 toward the suction side three-way valve 20 as a counterpart. Equivalent) is formed. The mouth portions 35, 36, and 40 communicate with the valve chamber 33a. On the other hand, as shown in FIG. 3, a T port 41 is formed inside the valve body 33a so that the mouth portions 35, 36, 40 can communicate with each other. Further, the valve body 33a is connected to a valve operation portion, for example, an I-shaped operation handle 42 disposed outside the valve housing 33, for example, directly above the valve housing 33, and is manually operated clockwise or counterclockwise by the operation handle 42. By switching the direction, the flow path connecting the mouth portions 35, 36, and 40 as shown in FIG. 3 is switched (corresponding to the first mode of the present application), or the mouth as shown in FIG. The flow path is switched between the portion 36 and the mouth portion 40 (corresponding to the second mode of the present application).
[0025]
Further, the end portions of the mouth portions 30 and 40 are inserted into each other as shown in FIG. A seal member, for example, an O-ring 45 is interposed between the two wall surfaces to be fitted, and the inserted portion serves as a seal. With this structure, a bypass passage 46 is formed between the three-way valves 20 and 21 by connecting the intermediate mouth portions 30 and 40 with a straight path having the shortest distance. As a result, when the operation handles 32 and 42 are positioned at the first water passing position, that is, communication between the mouth portions 25, 26, and 30 and communication between the mouth portions 35, 36, and 40, water received from the water pipe ( Pressure water (fluid) is introduced into the suction port 9 of the pump unit 1. At the same time, it is possible to bypass to the discharge side three-way valve 21 side. When the operation handles 32 and 42 are positioned at the second water passing position where only the mouth portion 26 and the mouth portion 30 communicate with each other and only the mouth portion 36 and the mouth portion 40 communicate with each other, the operation handles 32 and 42 receive from the water pipe. All of the water (pressure water: fluid) is bypassed to the three-way valve 21 side through the bypass 46.
[0026]
As shown in FIG. 2, a valve chamber 46 a formed, for example, at a part having a larger diameter than the other part is provided in a part of the bypass passage 46. In the valve chamber 46a, for example, a check valve portion 48 (first check valve portion) constituted by a check valve component in which a valve body (not shown) that is opened and closed by the elastic force of a spring is incorporated. Is equivalent). The check valve portion 48 is arranged in a direction to restrict the flow from the discharge side three-way valve 21 to the suction side three-way valve 20, and at the first water flow position, the suction pressure of the pump unit 1, that is, water in the water pipe When the pressure exceeds a predetermined pressure (target pressure), the pressure water from the water pipe is introduced into the discharge side three-way valve 21 through the bypass 46.
[0027]
Further, as shown in FIG. 2, the inside of the mouth portion 25 of the suction side three-way valve 20 is constituted by a check valve component having a built-in valve body (not shown) that is opened and closed by the elastic force of a spring, for example. And a check valve portion 49 (corresponding to a second check valve portion). The check valve portion 49 is arranged in a direction to restrict the flow from the suction port 9 to the suction side three-way valve 2. The check valve portion 49 prevents backflow from the pump unit 1 at the first water flow position.
[0028]
In addition, the wall portion of the bypass passage 46 on the suction side three-way valve 20 side sandwiching the check valve portion 48 has an attachment seat 50 (corresponding to the installation seat of the present application) on the upper wall portion as shown in FIG. ) Is formed. A suction pressure pressure detector 51 (corresponding to the pressure detector of the present application; hereinafter simply referred to as the pressure detector 51) for detecting the suction pressure is assembled to the mounting seat 50 via a cap 51a. However, 50b shows the cock attached to the nozzle | cap | die part 51a. The pressure detector 51 detects the primary side suction pressure of the pump 5. Of course, the pressure detector 51 is connected to the control panel 7. The control panel 7 stops the operation of the pump 5 (the operation of the pump unit 1) when the suction pressure from the pressure detector 51 falls below, for example, a predetermined lower limit value in order to suppress the influence on the water main. The function is set.
[0029]
With such a configuration, a bypass piping unit 16 suitable for the pump unit 1 in which the suction port 9 and the discharge port 13 are arranged in the same direction is configured. And, the port 25 of the bypass piping unit 16 is detachably connected to the suction port 9 of the pump 5, for example, is flange-coupled, and the port 35 of the bypass piping unit 16 is detachably connected to the discharge port 11 of the pump 5, For example, it is flange-coupled to constitute a single operation pump device P with a bypass piping unit 16. Water supply pipes (both not shown) connected to the water pipes and faucets from the main water pipe are connected to the respective mouth portions 26 and 36 of the pump unit P for independent operation with the bypass pipe unit 16 to increase the pressure of the tap water. It enables water supply or water supply only with water mains pressure.
[0030]
That is, in the automatic water supply operation (operation in which the start / stop control of the pump 5 is performed by the detection information of the pressure detector 12 and the flow rate detector 13), the three-way valve 20 on the suction side is operated by the operation handle 32. Thus, as shown in FIG. 3, the three-way valve 21 on the discharge side is positioned at the water passage position where the mouth portions 25, 26, 30 communicate with each other, and the mouth portion 35 is operated as shown in FIG. 3 by operating the operation handle 42. , 36, 40 are positioned at the water passage position where they communicate.
[0031]
At this time, it is assumed that the pressure water (fluid) from the water pipe is lower than the target pressure. Then, the pressure water passes through the mouth portion 26 of the suction side three-way valve 20, the valve body 24, the check valve portion 49, and the mouth portion 25 as shown by the solid arrow A in FIG. 9 leads to. And the pressure of the same pressure water is increased with the pump 5 to drive | operate, and it raises to a required water supply pressure. The tap water having the required water supply pressure is discharged from the discharge port 11 of the pump 5, and the tap water is supplied to the water supply pipe through the port 35, the valve body 34, and the port 36 of the discharge side three-way valve 21. The
[0032]
It is assumed that during operation of the pump 5, the pressure from the water main is high and the pressure of the water pipe exceeds the target pressure suitable for high distribution. Then, the check valve portion 48 in the bypass passage 46 is opened, and tap water is discharged from the mouth portion 30 of the suction side three-way valve 20 through the bypass passage 46 as shown by the broken line arrow B in FIG. It flows into the mouth 40 of the valve 21. On the other hand, the operation of the pump 5 stops when the discharge pressure (by the pressure detector 12 on the discharge side) becomes equal to or higher than a predetermined target pressure. Here, since the check valve portion 49 is incorporated in the mouth portion 25 of the suction side three-way valve 20, the tap water from the water pipe is bypassed to the water supply pipe without backflow, and the operation of the pump 5 is suppressed. Water supply is performed.
[0033]
However, during the operation of the pump unit 1, when the suction pressure (by the suction side pressure detector 51) falls below the lower limit predetermined pressure value, the operation of the pump 5 is stopped and the water main by the operation (start) of the pump 5 is stopped. To avoid impacts.
[0034]
If the pump 5 cannot be expected due to a failure or maintenance of the pump 5, the suction side three-way valve 20 is moved from the operation of the operation handle 32 to the mouth portion 26, as shown in FIG. Positioning at the water passing position where 30 communicates, the discharge side three-way valve 21 is positioned at the water passing position where the mouth portions 36 and 40 communicate from the operation of the operation handle 42, and all tap water from the water pipe is checked. It introduces into the bypass 46 with the valve part 48. Thereby, even in a situation where the pump 5 cannot be used, if the water pipe pressure exceeds the target pressure, water can be supplied only by the water main pipe pressure, and water shut-off is avoided.
[0035]
Thus, the bypass piping unit 16 arranges the three-way valves 20 and 21 on the suction side and the discharge side in accordance with the positions of the suction port 9 and the discharge port 11 of the pump unit 1, and a part of these three-way valves 20 and 21 is arranged. Since the bypass passage 46 is formed by utilizing it and the check valve portions 48 and 49 are housed in the bypass passage 46 and further in the mouth portion 25 of the suction side three-way valve 20, the conventional general-purpose piping is used. Unlike the bypass piping structure that combines members and check valves, it is a compact and simple structure that saves space, but when the suction pressure exceeds the target pressure while preventing backflow from the pump unit 1, The function of allowing the pressure water from the pipe to be bypassed from the bypass passage 46 to the discharge side, or to supply only the water main pipe pressure is ensured.
[0036]
Therefore, the bypass piping unit 16 can be easily connected to the pump unit 1 which is directly connected and has the suction port 9 and the discharge port 11 having considerable restrictions arranged in the same direction without being separately provided as in the prior art. Can be connected. That is, the bypass piping unit 16 suitable for the pump unit 1 with restrictions can be provided. In particular, since the bypass passage 46 is formed by the shortest route connecting the suction side three-way valve 20 and the discharge side three-way valve 21 with the shortest distance, the bypass piping unit 16 is excellent in terms of compactness.
[0037]
In addition, the wall portion of the bypass passage 46 has a structure that forms a mounting seat 50 on which the pressure detector 51 is installed. Therefore, a structure in which the pressure detector 51 is installed and the operation of the pump 5 is controlled by the suction pressure is used. However, the compact bypass piping unit 16 can be kept intact.
[0038]
In particular, the independent operation pump device P in which the bypass piping unit 16 is assembled in advance can realize an apparatus excellent in space saving by utilizing the compactness of the bypass piping unit 16.
[0039]
FIG. 5 shows a second embodiment of the present invention.
[0040]
This embodiment is not a structure in which the pressure detector 51 is installed in the bypass passage 46 as in the first embodiment, but in the mouth portion 25 of the suction side three-way valve 20, for example, the valve chamber 23a and the check valve portion 49. A mounting seat 50 is formed on the wall portion of the mouth portion 25 between them, and a pressure detector 51 is mounted on the mounting seat 50.
[0041]
Even if it does in this way, there exists an effect similar to 1st Embodiment. However, in FIG. 5, the same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0042]
In addition, this invention is not limited to each embodiment mentioned above, You may implement in various changes within the range which does not deviate from the main point of this invention.
[0043]
【The invention's effect】
As described above, according to the first aspect of the present invention, the bypass formed by utilizing a part of the suction / discharge side three-way valve and the three-way valve connectable to the suction port and discharge port of the pump unit for independent operation. A structure suitable for a single operation pump unit, that is, a suction / discharge port arranged in the same direction of the single operation pump unit, with a structure in which the check valve portion is housed in the passage and in the inlet of the suction side three-way valve. A bypass piping unit having a compact and simple structure that can be directly connected easily can be provided.
[0044]
According to the invention described in claim 2, there is an effect that the bypass piping unit can be further reduced in size.
[0045]
According to the third aspect of the present invention, there is an effect that even if the pump unit for single operation is controlled by detecting the suction pressure, the compactness is not impaired.
[0046]
According to invention of Claim 4, there exists an effect that the pump apparatus for independent operation which is compact and excellent in space-saving property can be provided using a bypass piping unit.
[Brief description of the drawings]
FIG. 1A is a side sectional view showing a bypass piping unit according to a first embodiment of the present invention together with a pump unit to which the unit is attached. (B) is also a partial front view.
FIG. 2 is a cross-sectional view of the same.
FIG. 3 is a diagram schematically showing the configuration.
FIG. 4 is a diagram showing a flow when pressure water from a water main is supplied to water as it is.
FIG. 5 is a diagram showing a main part of a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Pump unit, 5 ... Pump, 9 ... Suction port, 11 ... Discharge port, 16 ... Bypass piping unit, 20 ... Suction side three-way valve, 21 ... Discharge side three-way valve, 24 ... Valve body, 25, 26, 30 ... Mouth (first suction port, second suction port, third port), 34 ... valve, 35, 36, 40 ... mouth (first discharge port, second discharge port, third port) Part), 46 ... bypass path, 48, 49 ... first and second check valve parts, 50 ... mounting seat (installation seat), 51 ... pressure detector, P ... pump device for independent operation.

Claims (4)

A first suction port portion that is arranged corresponding to the suction port of the pump unit for single operation having a suction port and a discharge port that are arranged in parallel in the same direction and receives fluid from the outside, and the suction of the fluid A second suction port portion connectable to the suction port leading to the mouth, and a third mouth portion, wherein the first suction port portion communicates with the second suction port portion and the third mouth portion. A three-way valve on the suction side capable of switching between a mode and a second mode in which the first suction port and the third suction port communicate with each other;
A first discharge port portion arranged corresponding to the discharge port of the single operation pump unit and connectable to the discharge port receiving fluid from the discharge port; a second discharge port portion for guiding the fluid to the outside; and A first mode having a third port, wherein the first discharge port communicates with the second discharge unit and the third port; and the second discharge port communicates with the third port. A three-way valve on the discharge side that is switchable between the second mode and
A bypass passage configured by extending each third port of the suction-side and discharge-side three-way valves to the counterpart three-way valve and inserting each end;
A first check valve portion that is housed in the bypass passage and regulates the flow from the discharge-side three-way valve to the suction-side three-way valve;
A bypass pipe unit for independent operation, comprising: a second check valve portion that is housed in a second suction port portion of the three-way valve on the suction side and restricts the flow into the second suction port portion. . 2. The bypass pipe for independent operation according to claim 1, wherein the bypass passage is formed by a shortest path connecting the three-way valve on the suction side and the three-way valve on the discharge side with a shortest distance. unit. The bypass passage has an installation seat on which a pressure detector can be installed on a wall portion of a third port portion that forms a flow path from the first check valve portion to the three-way valve on the suction side. The bypass piping unit for independent operation according to claim 1 or 2, wherein the bypass piping unit is for independent operation. The pump unit for independent operation having a suction port and a discharge port arranged in parallel in the same direction, and connected to the suction port and the discharge port. A single-operation pump device comprising the single-operation bypass pipe unit described in 1 above.

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