Water supply device

Abstract

To apply a water supply device to various pump specifications, and easily perform maintenance work.SOLUTION: A water supply device comprises a pump 101, a suction side ball valve 202 and a discharge side ball valve 302 for releasing or blocking a flow of liquid in a pipe, and a handle 401 for opening and closing operating valve elements of the ball valves. The suction side ball valve 202 includes a spindle 208 for opening and closing the valve element by interlocking with the operation of the handle 401. The discharge side ball valve 302 includes a spindle 308 for opening and closing the valve element by interlocking with the operation of the handle 401. A rotation axis 208a of the spindle 208 and a rotation axis 308a of the spindle 308 are arranged on different straight lines. The water supply device comprises an interlocking part 400 for opening and closing the suction side and discharge side ball valves by interlocking them due to the operation of the handle 401.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a water supply device in which a plurality of pumps, a control unit, and a piping unit are provided within a housing. [Background technology]

[0002] Among water supply devices such as direct-connected water supply devices, there is known a package-type water supply device in which components such as a pump device with a motor, piping, an accumulator, and a control panel are housed in a housing section consisting of a stand and a drip-proof pump cover.

[0003] Regarding such a water supply device, Patent Document 1 discloses a water supply device configured to facilitate maintenance work by simultaneously opening and closing the suction and discharge side valves of each pump device with a single operation. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-190295 Summary of the Invention [Problem to be solved by the invention]

[0005] In the water supply device described in Patent Document 1, the rotation axes of the suction side and discharge side valves are arranged on the same straight line and in the same plane, so that the suction side and discharge side valves can be opened and closed simultaneously with a single operation.

[0006] However, when the pump specifications (direction and height of the discharge port) differ between the suction side and the discharge side, and the position of the on-off valve changes up, down, left, and right, it is difficult to apply the configuration of Patent Document 1 in order to achieve space saving and ensure the required pump pressure, because the rotation axes of the on-off valves are arranged on the same straight line and in the same plane.

[0007] Therefore, there is a demand for a water supply device that can be applied even when the opening and closing valve positions are not on the same plane due to pump specifications, and that allows maintenance work to be performed easily.

[0008] An object of the present invention is to provide a water supply device that can be applied to various pump specifications and that allows maintenance work to be easily performed.

[0009] The above objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings. [Means for solving the problem]

[0010] A brief summary of a representative embodiment of the present invention will be given below.

[0011] In one embodiment, the water supply device includes a pump, a first pipe connected to the pump's intake port, a second pipe connected to the pump's discharge port, a first gate valve that opens or closes the flow of liquid in the first pipe by opening or closing a first valve body, a second gate valve that opens or closes the flow of liquid in the second pipe by opening or closing a second valve body, and a handle for operating the opening and closing operations of the first and second valve bodies. Furthermore, the first gate valve includes a first spindle that rotates in conjunction with operation of the handle to change the opening or closing degree of the first valve body, and the second gate valve includes a second spindle that rotates in conjunction with operation of the handle to change the opening or closing degree of the second valve body. The rotation axes of the first spindle and the second spindle are arranged on different straight lines, and a linkage unit is provided that links and opens and closes the first and second gate valves in conjunction with operation of the handle. [Effects of the Invention]

[0012] The effects obtained by the representative inventions disclosed in this application will be briefly explained as follows.

[0013] This can be applied to a variety of pump specifications in water supply devices, making it possible to easily carry out maintenance work. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a front view of a water supply device according to a first embodiment of the present invention. [Figure 2] 2 is a perspective view showing the structure of a piping section in the water supply device shown in FIG. [Figure 3] FIG. 3 is a plan view showing the structure of the piping section shown in FIG. 2. [Figure 4] FIG. 3 is a horizontal cross-sectional view of the piping section shown in FIG. 2. [Figure 5] 3 is a perspective view showing the structure of a gate valve and an interlocking part provided in the piping part shown in FIG. 2. FIG. [Figure 6] FIG. 3 is a front view showing the structure of the piping section shown in FIG. 2. [Figure 7] 7 is a cross-sectional view showing the structure of a suction junction pipe in the piping section shown in FIG. 6. [Figure 8] FIG. 7 is a cross-sectional view showing the structure of a discharge junction pipe in the piping section shown in FIG. 6. [Figure 9] FIG. 10 is a front view showing the structure of a first modified example (increasing the number of pump stages) of the piping section of the water supply apparatus of the first embodiment. [Figure 10] FIG. 10 is a perspective view showing the structure of the piping section shown in FIG. [Figure 11] FIG. 10 is a front view showing the structure of a second modified example (reduced number of pump stages) of the piping section of the water supply apparatus of the first embodiment. [Figure 12] FIG. 12 is a perspective view showing the structure of the piping section shown in FIG. [Figure 13] FIG. 10 is a front view showing the structure of the piping section of a water supply apparatus according to a second embodiment of the present invention. [Figure 14] FIG. 14 is a perspective view showing the structure of the piping section shown in FIG. [Figure 15] FIG. 10 is a front view showing the structure of the piping section of a water supply apparatus according to a third embodiment of the present invention. [Figure 16] FIG. 16 is a perspective view showing the structure of the piping section shown in FIG. [Figure 17] FIG. 11 is a front view showing the structure of a modified example of the piping section of the water supply apparatus of the third embodiment. [Figure 18] FIG. 18 is a perspective view showing the structure of the piping section shown in FIG. [Figure 19] FIG. 10 is a front view showing the structure of the piping section of a water supply apparatus according to a fourth embodiment of the present invention. [Figure 20] FIG. 20 is a perspective view showing the structure of the piping section shown in FIG. [Figure 21] FIG. 10 is a front view showing the structure of a modified example of the piping section of the water supply apparatus of embodiment 4. [Figure 22] FIG. 22 is a perspective view showing the structure of the piping section shown in FIG. 21. [Figure 23] FIG. 10 is a front view showing the structure of the piping section of a water supply apparatus according to a fifth embodiment of the present invention. [Figure 24] FIG. 24 is a perspective view showing the structure of the piping section shown in FIG. 23. [Figure 25] FIG. 24 is a horizontal cross-sectional view of the piping section shown in FIG. 23. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, functionally identical elements may be designated by the same reference numerals.

[0016] (Embodiment 1) The water supply apparatus of the first embodiment is a pump system 100, for example, a pump system 100 equipped with an interlocking valve. FIG. 1 is a front view of the pump system 100 according to the first embodiment. To simplify the explanation, the front door is not shown in the pump system 100 shown in FIG. 1. The pump system 100 is box-shaped and surrounded by frames, and its left-right direction is defined as X1, its up-down direction as Y1, and its depth direction as Z1. Note that in the pump system 100, the left-right direction X1 may also be called the horizontal direction, the up-down direction Y1 as the height direction or vertical direction, and the depth direction Z1 as the front-to-rear direction.

[0017] The following describes the overall configuration of pump system 100. Pump system 100 is composed of a housing frame (pump housing) 102 that supports the entire device, a control frame 104 that is installed on housing frame 102 and houses control unit 103, unit unit 105 that is a unit device housed in control frame 104, and control unit 103 that controls equipment in unit unit 105 such as pump 101.

[0018] The unit section 105 includes a No. 1 pump (first pump) 106, a No. 2 pump (second pump) 107, a pressure reducing backflow preventer 108, a pressure tank 109, a bypass pipe 110, a No. 1 check valve 111, a No. 2 check valve 112, a suction gate valve 113, a discharge elbow 114, a discharge pressure sensor 116, a suction junction pipe (first junction pipe) 201, and a discharge junction pipe (second junction pipe) 301.

[0019] 1, two pumps 101 are provided, but at least one pump is sufficient, and three or more pumps may be provided. As described above, pump system 100 includes No. 1 pump (first pump) 106 and No. 2 pump (second pump) 107 as pumps 101. No. 1 pump (first pump) 106 and No. 2 pump (second pump) 107 are arranged side by side in the horizontal direction (left-right direction) X1 of pump system 100, and are also arranged at the same height in the vertical direction (height direction) Y1 of pump system 100.

[0020] A pump suction port (suction port) 118 of the No. 1 pump 106 is connected to a pump suction pipe (first pipe) 118a, and a pump suction port (suction port) 119 of the No. 2 pump 107 is connected to a pump suction pipe (first pipe) 119a. Meanwhile, a pump discharge port (discharge port) 122 of the No. 1 pump 106 is connected to a pump discharge pipe (second pipe) 120, and a pump discharge port (discharge port) 123 of the No. 2 pump 107 is connected to a pump discharge pipe (second pipe) 121.

[0021] In the unit section 105, the fluid inside the piping flows from the suction gate valve 113 to the pressure reducing backflow preventer 108, the suction junction pipe (first junction pipe) 201, the No. 1 pump 106 or the No. 2 pump 107, the No. 1 check valve 111 or the No. 2 check valve 112, the discharge junction pipe (second junction pipe) 301, and the discharge bend pipe 114. When the inflow pressure is sufficiently high, the fluid is supplied to the demand side via the bypass pipe 110 without passing through the pump 101.

[0022] Control unit 103 is housed in control frame 104 installed on top of housing frame 102, and although not shown, mainly includes an earth leakage breaker, an inverter, a control board, and other electronic devices. In the water supply unit, pressure values ​​obtained from a suction pressure sensor (not shown) and a discharge pressure sensor 116 are input to the control board, and the inverter is controlled to operate pump 101 at variable speeds.

[0023] A pressure-reducing backflow preventer 108 is connected to one end of the suction junction pipe 201. The pressure-reducing backflow preventer 108 is provided between the suction junction pipe 201 and the suction gate valve 113. The pressure-reducing backflow preventer 108 has the function of restricting the flow direction of the liquid in the flow path to one direction.

[0024] A relief valve unit 117 is provided at the bottom of the pressure-reducing backflow preventer 108. The relief valve unit 117 extends downward from the pressure-reducing backflow preventer 108. A water leak detection electrode may be provided at the drain outlet at the tip of the lower part of the relief valve unit 117. The water leak detection electrode detects water leakage from the pressure-reducing backflow preventer 108. A detected water leak signal can be sent to a water leak detection board.

[0025] Fig. 2 is a perspective view of the piping section provided in the pump system 100, such as the suction junction pipe 201, the discharge junction pipe 301, the bypass pipe 110, and the discharge bent pipe 114, Fig. 3 is a plan view of the piping section, Fig. 4 is a cross-sectional view of the piping section, and Fig. 5 is a perspective view of the gate valve and interlocking section provided in the piping section.

[0026] 1, the piping section provided in pump system 100 is provided with a suction junction pipe (first junction pipe) 201 that connects pump suction pipe 118a connected to No. 1 pump 106 and pump suction pipe 119a connected to No. 2 pump 107. The piping section further is provided with a discharge junction pipe (second junction pipe) 301 that connects pump discharge pipe 120 connected to No. 1 pump 106 and pump discharge pipe 121 connected to No. 2 pump 107.

[0027] As shown in FIG. 2, the suction junction pipe 201 is connected to the secondary side of the pressure-reducing backflow preventer 108. The suction junction pipe 201 and the discharge junction pipe 301 are arranged side by side in the depth direction Z1 of the pump system 100. Specifically, the suction junction pipe 201 is arranged on the rear side, and the discharge junction pipe 301 is arranged on the front side. The suction junction pipe 201 is arranged below and on the rear side of the No. 1 pump 106 and the No. 2 pump 107, along the arrangement direction W1 (see FIG. 1) of the No. 1 pump 106 and the No. 2 pump 107. The arrangement direction W1 is approximately parallel to the horizontal direction X1. The discharge junction pipe 301 is arranged on the front side, along the arrangement direction W1 of the No. 1 pump 106 and the No. 2 pump 107, and approximately parallel to the suction junction pipe 201. The suction junction pipe 201 and the discharge junction pipe 301 are disposed at approximately the same height in the height direction Y1.

[0028] Here, the first gate valve and second gate valve provided in pump system 100 will be described. Pump system 100 is provided with a suction-side ball valve (first gate valve) 202 that releases or blocks the flow of liquid in pump suction pipe 118a, and a discharge-side ball valve (second gate valve) 302 that releases or blocks the flow of liquid in pump discharge pipe 120. Suction-side ball valve 202 has a suction-side ball valve element (first valve element) 202a shown in FIG. 4, and releases or blocks the flow of liquid in pump suction pipe 118a by opening or closing suction-side ball valve element 202a. Discharge-side ball valve 302 has a discharge-side ball valve element (second valve element) 302a shown in FIG. 4, and releases or blocks the flow of liquid in pump discharge pipe 120 by opening or closing discharge-side ball valve element 302a.

[0029] The pump system 100 is also provided with a handle 401 for operating the opening and closing operations of the suction side ball valve element 202a and the discharge side ball valve element 302a. The handle 401 is provided so as to be rotatable.

[0030] As shown in Figures 2 to 4, the suction-side ball valve 202 of the No. 1 pump 106 includes a sensor rod (first spindle) 208 that rotates in conjunction with the rotation of the handle 401 to change the degree of opening or closing of the suction-side ball valve element 202a. That is, when the sensor rod 208 is rotated, the degree of opening or closing of the suction-side ball valve element 202a changes. Similarly, the discharge-side ball valve 302 of the No. 1 pump 106 includes a sensor rod (second spindle) 308 that rotates in conjunction with the rotation of the handle 401 to change the degree of opening or closing of the discharge-side ball valve element 302a. That is, when the sensor rod 308 is rotated, the degree of opening or closing of the discharge-side ball valve element 302a changes.

[0031] In pump system 100, rotation shaft 208a of sensor rod 208 and rotation shaft 308a of sensor rod 308 are arranged on different straight lines. In other words, rotation shaft 208a of sensor rod 208 and rotation shaft 308a of sensor rod 308 are not arranged on the same straight line. Pump system 100 has interlocking unit 400 for rotating rotation shafts 208a and 308a, which are not arranged on the same straight line, by operating a single handle. In other words, pump system 100 has interlocking unit 400 for interlocking and opening and closing suction side ball valve 202 and discharge side ball valve 302 by operating a single handle 401.

[0032] The interlocking unit 400 transmits the operation of one handle 401 from one ball valve to the other. In the example shown in Fig. 2, the handle 401 is attached to the rotating shaft 308a of the sensor rod 308 of the discharge-side ball valve element 302a of the discharge-side ball valve 302 located on the front side. Rotating the handle 401 rotates the rotating shaft 208a of the sensor rod 208 of the suction-side ball valve element 202a of the suction-side ball valve 202 located on the back side via the interlocking unit 400. In other words, rotating the handle 401 attached to the rotating shaft 308a of the sensor rod 308 of the discharge-side ball valve 302 on the front side opens or closes the discharge-side ball valve element 302a on the front side, and the operation of the interlocking unit 400 also opens or closes the suction-side ball valve element 202a on the back side in conjunction with the opening or closing of the discharge-side ball valve element 302a on the front side.

[0033] Similarly, the suction-side ball valve (first gate valve) 203 of the No. 2 pump 107 includes a sensor rod 208 that rotates in conjunction with the rotation of the handle 401 to change the degree of opening or closing of the suction-side ball valve element (first valve element) 203a. In other words, rotating the sensor rod 208 changes the degree of opening or closing of the suction-side ball valve element 203a. Similarly, the discharge-side ball valve (second gate valve) 303 of the No. 2 pump 107 includes a sensor rod 308 that rotates in conjunction with the rotation of the handle 401 to change the degree of opening or closing of the discharge-side ball valve element (second valve element) 303a. In other words, rotating the sensor rod 308 changes the degree of opening or closing of the discharge-side ball valve element 303a.

[0034] In the No. 2 pump 107, as in the No. 1 pump 106, the rotation shaft 208a of the sensor rod 208 and the rotation shaft 308a of the sensor rod 308 are arranged on different straight lines. In other words, the rotation shaft 208a of the sensor rod 208 and the rotation shaft 308a of the sensor rod 308 are not arranged on the same straight line. The No. 2 pump 107 also has an interlocking unit 400 that interlocks and opens and closes the suction-side ball valve 203 and the discharge-side ball valve 303 by operating a handle 401. That is, the interlocking unit 400 in the No. 2 pump 107 also transmits the operation of the handle 401 to the suction-side ball valve 203 and the discharge-side ball valve 303. In the example shown in FIG. 2, the handle 401 is attached to the rotation shaft 308a of the sensor rod 308 of the discharge-side ball valve element 303a of the discharge-side ball valve 303 located on the near side. Rotation of handle 401 rotates shaft 208a of sensor rod 208 of suction-side ball valve element 203a of suction-side ball valve 203 located at the back via interlocking unit 400. In other words, rotation of handle 401 attached to shaft 308a of sensor rod 308 of discharge-side ball valve 303 at the front opens or closes discharge-side ball valve element 303a at the front, and operation of interlocking unit 400 also opens or closes suction-side ball valve element 203a at the back in conjunction with the opening or closing of discharge-side ball valve element 303a at the front.

[0035] In this way, on the No. 1 pump 106 side, suction side ball valve 202 in pump suction pipe 118a connected to No. 1 pump 106 and discharge side ball valve 302 in pump discharge pipe 120 connected to No. 1 pump 106 are interlocked via interlocking unit 400. On the other hand, on the No. 2 pump 107 side, suction side ball valve 203 in pump suction pipe 119a connected to No. 2 pump 107 and discharge side ball valve 303 in pump discharge pipe 121 connected to No. 2 pump 107 are interlocked via interlocking unit 400.

[0036] One end of the suction junction pipe 201 is connected to the No. 1 pump 106 via a suction-side ball valve 202, and the other end is connected to the No. 2 pump 107 via a suction-side ball valve 203. Specifically, the suction junction pipe 201 has an upwardly extending suction opening 204 integrally therewith to connect to the No. 1 pump 106 disposed in the vertical direction Y1, and also has an upwardly extending suction opening 205 integrally therewith to connect to the No. 2 pump 107 disposed in the vertical direction Y1. The suction-side ball valve 202 is disposed at a node where the central axis of the suction opening 204 intersects with the horizontal axis of the suction junction pipe 201, and the suction-side ball valve 203 is disposed at a node where the central axis of the suction opening 205 intersects with the horizontal axis of the suction junction pipe 201. In addition, the lower part of the suction side ball valve 202 facing the suction opening 204 and the lower part of the suction side ball valve 203 facing the suction opening 205 can be removed during assembly or maintenance work of the suction side ball valve 202 or the suction side ball valve 203.

[0037] 1 has one end connected to pump discharge port 122 located on the side wall of No. 1 pump 106, and one end of pump discharge pipe 121 connected to pump discharge port 123 located on the side wall of No. 2 pump 107. Pump discharge pipe 120 extends forward from pump discharge port 122, then bends and extends downward, and pump discharge pipe 121 also extends forward from pump discharge port 123, then bends and extends downward. Furthermore, pump discharge pipe 120 is provided with No. 1 check valve 111 that restricts the flow direction of the liquid to one direction, and pump discharge pipe 121 is provided with No. 2 check valve 112 that restricts the flow direction of the liquid to one direction.

[0038] The lower end of pump discharge pipe 120 is connected to connecting pipe 118b and is connected to discharge junction pipe 301 provided below via discharge-side ball valve 302 shown in Fig. 2, and the lower end of pump discharge pipe 121 is connected to connecting pipe 119b and is connected to discharge junction pipe 301 provided below via discharge-side ball valve 303 shown in Fig. 2. Specifically, discharge junction pipe 301 has integral discharge openings 304 and 305 extending upward to connect to pump discharge pipes 120 and 121 arranged in the vertical direction Y1, and discharge-side ball valves 302 and 303 are arranged at the nodes where the central axes of discharge openings 304 and 305 intersect with the horizontal axis of discharge junction pipe 301. The lower part of discharge side ball valve 302, which faces discharge opening 304, and the lower part of discharge side ball valve 303, which faces discharge opening 305, can be removed during assembly or maintenance of discharge side ball valve 302 or discharge side ball valve 303. Furthermore, a discharge bent pipe 114, which discharges liquid that has flowed into discharge junction pipe 301 to the outside, is connected to the lower parts of discharge side ball valves 302 and 303.

[0039] Further, bypass connectors 206, 306 are provided at the intermediate portions of the suction junction pipe 201 and the discharge junction pipe 301, respectively, extending downward, and a bypass pipe 110 is connected to the bypass connectors 206, 306. Furthermore, a bypass check valve 124 is disposed in the bypass pipe 110 on the side closer to the discharge junction pipe 301.

[0040] The detailed structure of each ball valve will be explained using Figures 5 to 8. Suction-side ball valves 202, 203 and discharge-side ball valves 302, 303 house suction-side ball valve bodies 202a, 203a and discharge-side ball valve bodies 302a, 303a in the center of their interiors, respectively, and through-holes 207, 307 (see Figure 4) are formed around rotation axes 208a, 308a that pass through the centers of the valve bodies. Sen rods (first spindle, second spindle) 208, 308 are fitted into these through-holes 207, 307 and rotatably supported. Annular packings 209, 309 are provided above and below suction-side ball valves 202, 203 and discharge-side ball valves 302, 303. In this way, by providing annular packings 209, 309 above and below suction side ball valve bodies 202a, 203a and discharge side ball valve bodies 302a, 303a, suction side ball valve bodies 202a, 203a and discharge side ball valve bodies 302a, 303a, the suction side ball valve bodies 202a, 203a and discharge side ball valve bodies 302a, 303a are sealed in the piping, thereby preventing water leakage. In addition, by rotating annular packings 209, 309 and suction side ball valve bodies 202a, 203a and discharge side ball valve bodies 302a, 303a, water flow can be controlled and the flow direction can be changed.

[0041] The suction side ball valve bodies 202a, 203a and the discharge side ball valve bodies 302a, 303a are three-way valves with T-shaped holes in three directions perpendicular to the rotation shafts 208a, 308a.

[0042] As shown in Figure 4, two O-rings 210, 310 are provided concentrically with the rotation axis 208a, 308a of the sensor rod 208, 308 at the fitting portion of the sensor rod 208, 308 to prevent liquid from leaking from the flow path and isolate it from the outside space. The ends of the sensor rods 208, 308 are parallel to the rotation axis 208a, 308a and have two surfaces. Each ball valve is fitted into a rectangular groove in the suction-side ball valve element 202a, 203a and the discharge-side ball valve element 302a, 303a to transmit rotation. A handle 401 is attached to one end of the discharge-side ball valve 302, 303 on the front side for adjusting the rotation angle of the ball valve element. In other words, the handle 401 is attached to the rotation shaft 308a of the discharge-side ball valves 302, 303 in the piping connected to the discharge junction pipe 301 located on the near side of the suction junction pipe 201 and the discharge junction pipe 301 arranged side by side in the depth direction Z1. Furthermore, as shown in Fig. 8, the bypass pipe 110 connected to the discharge junction pipe 301 via the bypass connection part 306 is provided with a valve body 124a of the bypass check valve 124, and the valve body 124a can suppress the backflow of water flowing in the bypass pipe 110.

[0043] 5, the rotation axis 208a of the sensor rod 208 of the suction side ball valve 202 and the rotation axis 208a of the sensor rod 208 of the suction side ball valve 203 are provided at different positions in the arrangement direction W1 of the No. 1 pump 106 and the No. 2 pump 107 shown in FIG. 1. In other words, the rotation axis 208a of the sensor rod 208 of the suction side ball valve 202 and the rotation axis 208a of the sensor rod 208 of the suction side ball valve 203 are arranged with a deviation in the arrangement direction W1 of the No. 1 pump 106 and the No. 2 pump 107. In this case, the arrangement direction W1 is the same as the horizontal direction X1 of the pump system 100. In other words, the rotation axis 208a of the sensor rod 208 and the rotation axis 308a of the sensor rod 308 are not arranged on the same straight line, but are arranged with a deviation in the horizontal direction X1. For this reason, pump system 100 has interlocking unit 400 for rotating rotating shafts 208a and 308a, which are not arranged on the same straight line, by operating a single handle. In other words, pump system 100 has interlocking unit 400 for interlocking and opening and closing suction side ball valve 202 and discharge side ball valve 302 by operating a single handle 401.

[0044] Here, the interlocking unit 400 of the pump system 100 will be described.

[0045] 5, the interlocking unit 400 of the pump system 100 includes a first plate 402a rotatably attached to the rotation shaft 208a of the sensor rod 208 on the side facing the suction-side ball valves 202, 203, and a second plate 402b rotatably attached to the rotation shaft 308a of the sensor rod 308 on the side facing the ball valves of the discharge-side ball valves 302, 303. The interlocking unit 400 further includes two third plates 403 that connect the first plate 402a and the second plate 402b. The third plate 403 is longer than the first plate 402a and the second plate 402b.

[0046] Specifically, a first plate 402a is attached to the rotating shaft 208a of the sensor rod 208 of the suction side ball valves 202, 203. A second plate 402b is attached to the opposite side of the rotating shaft 308a of the discharge side ball valves 302, 303. Link holes 402c are formed at both ends of the first plate 402a. Link holes 402d are formed at both ends of the second plate 402b. Link holes 403a are formed at both ends of the third plate 403. Link holes 402c of the first plate 402a and 403a of the third plate 403, and link holes 402c of the second plate 402b and 403a of the third plate 403 are rotatably connected by link pins 404. Spacers 405 and 406 are interposed between the first plate 402a and the third plate 403, and between the second plate 402b and the third plate 403, respectively.

[0047] In the example shown in Figure 5, link mechanism 407 consisting of first plate 402a, second plate 402b, third plate 403, link pin 404, and spacers 405 and 406 constitutes interlocking part 400, and this link mechanism 407 is configured to allow suction side ball valves 202 and 203 and discharge side ball valves 302 and 303 to operate in conjunction with each other.

[0048] 9 and 10 are a front view and a perspective view showing a first modified example of the piping section of the first embodiment (increasing the number of pump stages). That is, the structure of the piping section including the link mechanism 407 (interlocking unit 400) when the number of pump stages of the No. 1 pump 106 and the No. 2 pump 107 shown in FIG. 1 is increased is shown. Increasing the number of pump stages increases the height of the pump in the rotational axis direction. As the height of the pump in the rotational axis direction increases, the heights of the pump discharge ports 122 and 123 also increase. This increases the installation positions of the No. 1 check valve 111, the No. 2 check valve 112, the discharge junction pipe 301, and the discharge bent pipe 114. In this case, the rotation axis 208a of the sensor rod 208 of the suction-side ball valves 202 and 203 and the rotation axis 308a of the sensor rod 308 of the discharge-side ball valves 302 and 303 are located at different positions in the height direction Y1 of the pump system 100. In the example shown in FIGS. 9 and 10, the rotation axis 308a of the sensor rod 308 of the discharge side ball valves 302, 303 is positioned higher than the rotation axis 208a of the sensor rod 208 of the suction side ball valves 202, 203.

[0049] Even if the pump specifications are changed, the suction side ball valves 202, 203 and the discharge side ball valves 302, 303 can be interlocked by adjusting the length of the third plate 403 according to the distance between the rotation axes of the suction side ball valves 202, 203 and the discharge side ball valves 302, 303. In other words, even if the pump specifications are changed, the suction side ball valves 202, 203 and the discharge side ball valves 302, 303 can be interlocked by the link mechanism 407 (interlocking part 400) consisting of the first plate 402a, the second plate 402b, the link pin 404, and the spacers 405, 406.

[0050] 11 and 12 are a front view and a perspective view showing a second modified example of the piping section of the first embodiment (reducing the number of pump stages). That is, they show the structure of the piping section including the link mechanism 407 (interlocking section 400) when the number of pump stages of the No. 1 pump 106 and the No. 2 pump 107 shown in FIG. 1 is reduced. Reducing the number of pump stages reduces the height of the pump in the direction of the rotation axis. As a result, the installation positions of the No. 1 check valve 111, the No. 2 check valve 112, the discharge junction pipe 301, and the discharge bent pipe 114 are lowered. In this case, the rotation axis 208a of the sensor rod 208 of the suction side ball valves 202, 203 and the rotation axis 308a of the sensor rod 308 of the discharge side ball valves 302, 303 are at different positions in the height direction Y1 of the pump system 100, and the rotation axis 308a of the sensor rod 308 of the discharge side ball valves 302, 303 is at a lower position than the rotation axis 208a of the sensor rod 208 of the suction side ball valves 202, 203.

[0051] As with the first modified example, even if the pump specifications are changed, the suction side ball valves 202, 203 and the discharge side ball valves 302, 303 can be interlocked by adjusting the length of the third plate 403 according to the distance between the rotation axes of the suction side ball valves 202, 203 and the discharge side ball valves 302, 303. In other words, even if the pump specifications are changed, the suction side ball valves 202, 203 and the discharge side ball valves 302, 303 can be interlocked by the link mechanism 407 (interlocking part 400) consisting of the first plate 402a, the second plate 402b, the link pin 404, and the spacers 405, 406.

[0052] In pump system 100 of the first embodiment, rotating shaft 208a of sensor rod 208 of suction-side ball valves 202, 203 and rotating shaft 308a of sensor rod 308 of discharge-side ball valves 302, 303 are not aligned on the same line but are offset from each other. Furthermore, pump system 100 includes interlocking unit 400 for rotating non-aligned rotating shafts 208a and 308a with a single handle to open and close the two ball valves. This allows pump system 100 to be applied even when pump specifications (such as discharge port orientation and height) vary and ball valve positions change vertically or horizontally. This means that pump system 100 can be applied to a variety of pump specifications, facilitating maintenance work.

[0053] For example, even if the height of the piping changes due to the installation of the pump, the two ball valves on the front and back sides can be opened and closed in conjunction with each other by providing the interlocking unit 400 such as the link mechanism 407 in the pump system 100. This makes it easy to operate the two ball valves when inspecting or maintaining the pump and ball valves.

[0054] Furthermore, in pump system 100, suction-side ball valves 202, 203 and discharge-side ball valves 302, 303 are opened and closed in conjunction with one handle operation. This reduces the burden of handle operation. Furthermore, since there is no need to attach handle 401 to suction-side ball valves 202, 203 of suction junction pipe 201 located at the back, space for installation and operation can be saved.

[0055] Furthermore, even if the number of pump stages in the interlocking unit 400 of the pump system 100 is increased or decreased, the change in the number of pump stages can be accommodated by adjusting the length of the third plate 403 in accordance with the center-to-center distance of the installed ball valves. In other words, pumps with various numbers of stages can be used in the pump system 100. By adjusting the length of the third plate 403 of the interlocking unit 400 in accordance with the change in the number of pump stages in this way, the length of the discharge pipe does not need to be changed, so it is possible to easily accommodate changes in the number of pump stages while suppressing increases in costs due to component replacement, etc.

[0056] Furthermore, in the pump system 100, the rotation axes 208a, 308a of the gate valves are set perpendicular to the flow of the liquid, so it is preferable to use ball valves (suction side ball valves 202, 203, discharge side ball valves 302, 303) as the gate valves.

[0057] 2 and 3, in the interlocking portion 400, by interposing a spacer 405 at the connecting portion between the second plate 402b and the third plate 403, it is possible to avoid interference between the third plate 403 and the sensor rods 208, 308. This allows the rotation angle of the ball valve to be increased.

[0058] Furthermore, by making the size of the three-way holes of the suction side ball valve bodies 202a, 203a and the discharge side ball valve bodies 302a, 303a the same diameter as the inner diameter of the flow paths of the suction junction pipe 201 and the discharge junction pipe 301, changes in the liquid flow rate can be suppressed, thereby reducing pressure loss.

[0059] Furthermore, by arranging the suction junction pipe 201 and the discharge junction pipe 301 side by side in the depth direction Z1, the length of the pipe from the suction port to the discharge port can be reduced, and pressure loss can be suppressed.

[0060] In the first embodiment, the suction junction pipe 201 and the discharge junction pipe 301 have the same structure and shape, which allows the same piping to be used and improves mass productivity. Furthermore, by making the junction pipes on the suction side and the discharge side the same shape, the link mechanism 407 can also be shared between the No. 1 and No. 2 sides of the ball valve.

[0061] (Embodiment 2) 13 and 14 are a front view and a perspective view of the piping section of the second embodiment. In the second embodiment, the link mechanism 407, which is the interlocking section 400, includes a short first plate 402e attached to the rotation shaft 208a of the suction-side ball valves 202 and 203 and the rotation shaft 308a of the discharge-side ball valves 302 and 303, and a third plate 403 connected to the two first plates 402e. The third plate 403 is provided with a bent portion 403b. The bent portion 403b is bent along the arrangement direction W2 of the suction junction pipe 201 and the discharge junction pipe 301, and the bent portions 403b are provided at at least two locations on the third plate 403. The arrangement direction W2 is substantially parallel to the depth direction Z1 of the pump system 100.

[0062] This prevents the third plate 403 from coming into contact with the suction junction pipe 201 and the discharge junction pipe 301, and eliminates restrictions on the rotation angle of the ball valve. As a result, the spacing between the suction junction pipe 201 and the discharge junction pipe 301 can be shortened, allowing the suction junction pipe 201 and the discharge junction pipe 301 to be positioned closer to each other. This allows the pump system 100 to be made more compact.

[0063] Furthermore, as in the above-mentioned embodiment 1, even if the installation position of the ball valve rotating shafts 208a, 308a changes up, down, left, or right depending on the pump specifications, the suction side ball valves 202, 203 and the discharge side ball valves 302, 303 are configured to be able to move in conjunction with each other by adjusting the length of the third plate 403.

[0064] In the pump system 100 of the second embodiment configured as described above, in addition to the effects of the first embodiment, interference between the interlocking part 400 and the sensor rods 208, 308, the suction junction pipe 201, and the discharge junction pipe 301 can be avoided, so that the valve can be operated without limiting the rotation angle of the ball valve.

[0065] (Embodiment 3) 15 and 16 are a front view and a perspective view of the piping section of the third embodiment. In this third embodiment, interlocking unit 400 includes a disk-shaped suction-side sprocket 408 rotatably attached to the rotation shaft 208a of the sensor rod 208 on the side opposite the suction-side ball valves 202 and 203, and a disk-shaped discharge-side sprocket 409 rotatably attached to the rotation shaft 308a of the sensor rod 308 on the side opposite the ball valves of discharge-side ball valves 302 and 303. Furthermore, interlocking unit 400 includes a roller chain 410 that meshes with suction-side sprocket 408 and discharge-side sprocket 409. That is, roller chain 410 is attached to suction-side sprocket 408 and discharge-side sprocket 409 to connect the sprockets. The suction side ball valves 202, 203 and the discharge side ball valves 302, 303 are configured to be interlocked by the suction side sprocket 408, the discharge side sprocket 409, and the roller chain 410.

[0066] Furthermore, as in the above-mentioned embodiment 1, even if the installation position of the ball valve rotating shafts 208a, 308a changes up, down, left, or right depending on the pump specifications, the suction side ball valves 202, 203 and the discharge side ball valves 302, 303 are configured to be able to move in conjunction with each other by adjusting the length of the roller chain 410.

[0067] In the pump system 100 of the third embodiment configured as described above, in addition to the effects of the first embodiment described above, interference with the interlocking part 400 can be avoided, so that the valve can be operated without limiting the rotation angle of the ball valve.

[0068] In this case, as an example, if the number of teeth on the suction side sprocket 408 and the discharge side sprocket 409 are both 26, the rotation angles of the suction side ball valve bodies 202a, 203a and the discharge side ball valve bodies 302a, 303a can be synchronized.

[0069] 17 and 18 are a front view and a perspective view showing the structure of a modified piping section of the third embodiment. In this modified example, the number of teeth of suction-side sprocket 408 shown in FIG. 15 is increased to 13. A small-diameter, disk-shaped suction-side sprocket 408a is rotatably attached to the rotating shaft 208a of the sensor rod 208 on the side facing the suction-side ball valves 202 and 203. A disk-shaped discharge-side sprocket 409 is attached to the rotating shaft 308a of the sensor rod 308 on the side facing the ball valves of discharge-side ball valves 302 and 303. Therefore, the diameter of suction-side sprocket 408a attached to the rotating shaft 208a of the ball valve at the back is smaller than the diameter of discharge-side sprocket 409 attached to the rotating shaft 308a of the ball valve at the front.

[0070] With this configuration, when handle 401 is rotated 90 degrees, discharge-side ball valve elements 302a, 303a rotate by 90 degrees. On the other hand, suction-side ball valve elements 202a, 203a rotate by 180 degrees because suction-side sprocket 408a has half the number of teeth of discharge-side sprocket 409. Therefore, by changing the number of teeth of suction-side sprocket 408 and discharge-side sprocket 409, any combination of rotation angles can be achieved in the ball valve.

[0071] (Fourth embodiment) 19 and 20 are a front view and a perspective view of the piping section of the fourth embodiment. In this fourth embodiment, the interlocking unit 400 includes a suction-side toothed pulley (first toothed pulley) 411 rotatably attached to the rotation shaft 208a of the sensor rod 208 on the side facing the ball valves of the suction-side ball valves 202 and 203, and a discharge-side toothed pulley (second toothed pulley) 412 rotatably attached to the rotation shaft 308a of the sensor rod 308 on the side facing the ball valves of the discharge-side ball valves 302 and 303. The suction-side toothed pulley 411 and the discharge-side toothed pulley 412 are each disk-shaped. Furthermore, the interlocking unit 400 includes a toothed belt 413 that meshes with the suction-side toothed pulley 411 and the discharge-side toothed pulley 412. That is, a toothed belt 413 is attached to connect the suction side toothed pulley 411 and the discharge side toothed pulley 412. The suction side toothed pulley 411, the discharge side toothed pulley 412, and the toothed belt 413 enable the suction side ball valves 202, 203 and the discharge side ball valves 302, 303 to move in conjunction with each other.

[0072] Furthermore, as in the above-mentioned embodiment 1, even if the installation position of the ball valve rotating shafts 208a, 308a changes up, down, left, or right depending on the pump specifications, the suction side ball valves 202, 203 and the discharge side ball valves 302, 303 are configured to be able to move in conjunction with each other by adjusting the length of the toothed belt 413.

[0073] In pump system 100 of the fourth embodiment configured as described above, in addition to the effects of the third embodiment, toothed belt 413 is made of rubber or resin, which makes it possible to reduce the weight of interlocking unit 400. Furthermore, there is no need for rust prevention or oil lubrication, which reduces the frequency of maintenance work on the ball valve.

[0074] 21 and 22 are a front view and a perspective view showing a modification of the piping section of Embodiment 4. In this modification, the number of teeth of suction-side toothed pulley 411 shown in FIG. 19 is increased to 13, and a small-diameter, disk-shaped suction-side toothed pulley 411a is rotatably attached to the rotating shaft 208a of the sensor rod 208 on the side facing the ball valves of suction-side ball valves 202 and 203. Therefore, the diameter of suction-side toothed pulley (first toothed pulley) 411a attached to the rotating shaft 208a of the ball valve on the far side is smaller than the diameter of discharge-side toothed pulley 412 attached to the rotating shaft 308a of the ball valve on the near side.

[0075] With this configuration, when handle 401 is rotated 90 degrees, discharge-side ball valve elements 302a and 303a rotate by 90 degrees. Meanwhile, suction-side toothed pulley 411a and discharge-side toothed pulley 412 have different numbers of teeth, with suction-side toothed pulley 411a having fewer teeth than discharge-side toothed pulley 412. As a result, suction-side ball valve elements 202a and 203a rotate by 180 degrees because suction-side toothed pulley 411a has half the number of teeth of discharge-side toothed pulley 412. Therefore, by changing the number of teeth of suction-side toothed pulley 411 and discharge-side toothed pulley 412, any combination of rotation angles can be achieved in the ball valve.

[0076] (Embodiment 5) 23 and 24 are a front view and a perspective view showing the piping section of the fifth embodiment. FIG. 25 is a cross-sectional view of the piping section shown in FIG. 23. In the fifth embodiment, bypass openings 211, 311 (see FIG. 25) are formed on the opposing side surfaces of the suction junction pipe 201 and the discharge junction pipe 301, which are arranged side by side along the arrangement direction W2, and a bypass flow path 414 is formed to connect these openings. In other words, a short bypass flow path 414 is formed integrally with each of the two junction pipes arranged side by side. A bypass check valve 415 is built into the bypass flow path 414.

[0077] A short first plate 402e is attached to one end of the sensor rod 208, 308 on the side opposite the ball valve (tip side) where the suction side ball valves 202, 203 and the discharge side ball valves 302, 303 face each other. A link hole 402c is formed at the end of the first plate 402e. A third plate 403, which also has a link hole 403a, is connected to each of the first plates 402e on the No. 1 pump 106 side and the No. 2 pump 107 side. The link holes 402c, 403a of the first plate 402e and the third plate 403 are rotatably connected by a link pin 404. Spacers 405, 406 are interposed between the first plate 402e and the third plate 403.

[0078] Therefore, in the structure shown in Figures 23 to 25, the interlocking section 400 is provided with a link mechanism 407 consisting of a first plate 402e, a third plate 403, a link pin 404, and spacers 405 and 406, and the link mechanism 407 enables the suction side ball valves 202 and 203 and the discharge side ball valves 302 and 303 to be interlocked.

[0079] In the pump system 100 of the fifth embodiment configured as described above, the bypass pipe (bypass flow path 414) can be made smaller and lighter, and the amount of material used for the piping can be reduced. Furthermore, by extending the first plate 402e to one side with respect to the rotation axis of the ball valve, interference with the bypass flow path 414 can be avoided by operating the handle. Furthermore, because the bypass pipe (bypass flow path 414) can be made smaller, a large space can be provided below the suction junction pipe 201 and the discharge junction pipe 301, making it easier to handle the piping and to perform work such as inspection and maintenance. Furthermore, because the bypass pipe (bypass flow path 414) can be shortened, the pressure loss of the fluid can be reduced.

[0080] As described above, the present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to an embodiment having all of the described configurations.

[0081] Furthermore, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add a configuration of another embodiment to a configuration of one embodiment. Furthermore, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration. Note that the components and relative sizes shown in the drawings are simplified and idealized to make the present invention easier to understand, and in reality, some components may have more complex shapes.

[0082] For example, in the above embodiment, the gate valve is a ball valve, but the gate valve may be a needle valve or the like other than a ball valve. [Explanation of symbols]

[0083] 100 Pump system (water supply system) 101 Pump 102 Housing Frame 103 Control Unit 104 Control Frames 105 Unit Section 106 No. 1 Pump (1st Pump) 107 No. 2 Pump (Second Pump) 108 Pressure reducing backflow preventer 109 Pressure Tank 110 Bypass pipe 111 No. 1 check valve 112 No. 2 check valve 113 Suction gate valve 114 Discharge bend 116 Discharge pressure sensor 117 Relief valve section 118 Pump intake (intake) 118a Pump suction pipe (first piping) 118b Connecting pipe 119 Pump intake (intake) 119a Pump suction pipe (first piping) 119b Connecting pipe 120 Pump discharge pipe 121 Pump discharge pipe 122 Pump discharge port (discharge port) 123 Pump discharge port (discharge port) 124 Bypass check valve 124a Valve body 201 Suction junction pipe (first junction pipe) 202 Suction side ball valve (first gate valve) 202a Suction side ball valve body (first valve body) 203 Suction side ball valve (first gate valve) 203a Suction side ball valve body (first valve body) 204 Intake opening 205 Intake opening 206 Bypass Connection 207 Through Hole 208 Sen rod (first spindle) 208a Rotation axis 209 Annular packing 210 O-ring 211 Bypass opening 301 Discharge junction pipe (second junction pipe) 302 Discharge side ball valve (second gate valve) 302a Discharge side ball valve body (second valve body) 303 Discharge side ball valve (second gate valve) 303a Discharge side ball valve body (second valve body) 304 Discharge opening 305 Discharge opening 306 Bypass Connection 307 Through Hole 308 Sen rod (second spindle) 308a Rotating shaft 309 Annular packing 310 O-ring 311 Bypass opening 400 Interlocking part 401 Handle 402a Plate 1 402b 2nd Plate 402c Link hole 402d link hole 402e 1st Plate 403 Third Plate 403a Link hole 403b Bent part 404 link pin 405 Spacer 406 Spacer 407 Link Mechanism 408 Intake sprocket 408a Intake sprocket 409 Discharge sprocket 410 Roller Chain 411 Suction side toothed pulley (first toothed pulley) 411a Suction side toothed pulley 412 Discharge side toothed pulley 413 Toothed Belt 414 Bypass flow path 415 Bypass check valve W1 Array direction W2 Array Direction X1 Horizontal Y1 Vertical direction (height direction) Z1 depth direction

Claims

1. A pump and a first pipe connected to the suction port of the pump; a second pipe connected to the discharge port of the pump; a first gate valve that opens or closes the flow of liquid in the first pipe by opening or closing a first valve body; a second gate valve that opens or closes the flow of liquid in the second pipe by opening or closing a second valve body; a handle for operating the first valve body and the second valve body to open and close; A water supply device having the first gate valve includes a first spindle that rotates in conjunction with the operation of the handle to change the opening / closing degree of the first valve body, the second gate valve includes a second spindle that rotates in conjunction with the operation of the handle to change the opening / closing degree of the second valve body, the rotation axis of the first spindle and the rotation axis of the second spindle are disposed on different straight lines, A water supply device having a linkage section that links and opens and closes the first gate valve and the second gate valve by operating the handle.

2. The water supply device according to claim 1, The pump includes a first pump and a second pump, the first gate valve in the first pipe connected to the first pump and the second gate valve in the second pipe connected to the first pump are interlocked with each other; A water supply device in which the first gate valve in the first pipe connected to the second pump and the second gate valve in the second pipe connected to the second pump are linked together.

3. The water supply device according to claim 2, a first junction pipe connecting the first pipe connected to the first pump and the first pipe connected to the second pump; a second junction pipe connecting the second pipe connected to the first pump and the second pipe connected to the second pump; and A water supply device, wherein the first junction pipe and the second junction pipe are arranged side by side in the depth direction of the water supply device.

4. The water supply device according to claim 3, A water supply device in which the handle is attached to the rotating shaft of a spindle provided in a check valve in a pipe connected to the junction pipe located closer to the front of the first junction pipe and the second junction pipe.

5. The water supply device according to claim 2, A water supply device, wherein the rotation axis of the first spindle and the rotation axis of the second spindle are provided at different positions in an arrangement direction of the first pump and the second pump.

6. The water supply device according to claim 2, A water supply device, wherein the rotation axis of the first spindle and the rotation axis of the second spindle are provided at different positions in a height direction of the water supply device.

7. The water supply device according to claim 3, The interlocking portion is a first plate rotatably attached to the rotation shaft of the first spindle; a second plate rotatably attached to the rotation shaft of the second spindle; a third plate connecting the first plate and the second plate; A water supply device comprising:

8. The water supply device according to claim 7, The water supply device, wherein the third plate has a bent portion that bends in the arrangement direction of the first junction pipe and the second junction pipe.

9. The water supply device according to claim 1, The interlocking portion is a first toothed pulley rotatably attached to the rotary shaft of the first spindle; a second toothed pulley rotatably attached to the rotary shaft of the second spindle; a toothed belt that meshes with the first toothed pulley and the second toothed pulley; A water supply device comprising:

10. The water supply device according to claim 9, The first toothed pulley and the second toothed pulley have different numbers of teeth.

Images