JP5917500B2 - Three-way valve and water supply device - Google Patents

Description

  The present invention relates to a three-way valve and a water supply apparatus including the three-way valve.

  Water supply equipment is installed in condominiums and buildings. Such a water supply device cannot stop the supply of water even if the pump fails. For this reason, it is common to install a plurality of pumps in parallel. FIG. 1 is a diagram illustrating a configuration example of a water supply apparatus including two pumps. The water supply apparatus 100 includes two pumps, a first pump 101 and a second pump 102. A first water supply side valve 103 is connected to the suction port of the first pump 101 via a first water supply side pipe, and a first check valve 105 and a first water distribution are connected to the discharge port via a first water supply side pipe. The side valve 107 is connected in this order. The second valve 104 is connected to the suction port of the second pump 102 via a second water supply side pipe, and the second check valve 106 and the second water supply side are connected to the discharge port via a second water distribution side pipe. Valves 108 are connected in this order. A water supply side common pipe 109 is connected to the first water supply side valve 103 and the second water supply side valve 104, and a water supply side common pipe 110 is connected to the first water supply side valve 107 and the second water supply side valve 108. Yes. In addition, a pressure tank 111 and a water distribution side common valve 112 are connected to the water distribution side common pipe 110.

  In the water supply apparatus 100 having the above configuration, when either the first pump 101 or the second pump 102 fails, the first water supply side valve 103, the second water supply side valve 104, the first water supply side valve 107, the second water supply side By combining opening and closing of the valve 108 and the water distribution side common valve 112, the pump to be operated is switched and the supply of water is continued. For example, when the second pump 102 breaks down and the second pump is removed to repair the failed portion, the first water supply side valve 103 is opened, the second water supply side valve 104 is closed, the first water distribution side valve 107 is opened, The second water distribution side valve 108 is closed, the water distribution side common valve 112 is opened, and the second pump 102 is removed while continuing to supply water through the water supply side common pipe 109 and the water distribution side common pipe 110 only by the first pump 101. . Further, for example, when the first pump 101 fails and the first pump 101 is removed to repair the failed part, the first water supply side valve 103 is closed, the second water supply side valve 104 is opened, and the first water distribution side valve 107 is closed, the second water distribution side valve 108 is opened, the water distribution side common valve 112 is opened, and the water supply is continued through the water supply side common pipe 109 and the water distribution side common pipe 110 only by the second pump 102, Remove the pump 101.

JP 2008-261276 A JP 2001-165039 A

  In recent years, as shown in FIG. 2, the water supply device has a structure using a three-way valve 120 on the water distribution side so that it can be installed even in a narrow place, and space saving has been promoted (for example, see Patent Document 1). Further, as shown in FIG. 3, this type of recent water supply apparatus has a configuration in which the water supply apparatus 100 is arranged in the cabinet 130 using a cabinet 130 having an opening surface 132 that can be opened and closed by a cabinet door 131. There are many things. 3A is a plan view of the water supply apparatus 100 housed in the cabinet 130, and FIG. 3B is a front view when the cabinet door 131 is removed. In the configuration in which the water supply device 100 is housed in the cabinet 130 as described above, the first pump 101 and the second pump 102 are provided with each pump (the first pump 101 and the first pump 101) so that the repair and maintenance of the failure can be easily performed. The two pumps 102) are arranged on the opening surface 132 side in the cabinet 130. On the other hand, the three-way valve 120 must be installed behind the first pump 101 and the second pump 102. When the three-way valve 120 is installed on the back side of the first pump 101 and the second pump 102, in the narrow cabinet 130, each valve for switching the communication / closing of each flow path of the three-way valve 120 is accurately and reliably opened and closed. Work may be difficult. In the following description, an example in which a valve is individually installed in each flow path of the three-way valve 120 will be described. However, the present invention is of a type in which one valve body is rotated to switch communication / closing of the flow path. Is also included in the scope of rights.

  In order to open and close each valve of the three-way valve 120 disposed in the cabinet 130, a dedicated handle is usually provided (see, for example, Patent Document 1). However, when a dedicated handle is provided in this way, a space for opening and closing work is required, and thus a large space in the cabinet 130 must be taken. Further, if the handle or the like is always attached, there is a concern that the work may be hindered during maintenance and inspection of the first and second pumps 101 and 102. When the cabinet 130 of the water supply apparatus 100 is made smaller, it is necessary to open and close each valve in a space where it is difficult to perform work such as the back side of each pump 101 and 102 in a limited narrow space. . In addition, in the utility space where the cabinet 130 is installed, there is no problem as long as sufficient lighting is provided for all utilities. However, in the place where the cabinet 130 is placed, the lighting is not sufficient. There are many. Thus, even in a place where the illumination of the place where the cabinet 130 is placed is not sufficient, the opening / closing operation of each valve for stopping the target pump must be performed accurately and reliably.

  The target pump cannot be stopped unless each valve is correctly opened and closed. In addition, if the valve opening is insufficient, pressure loss occurs in the vicinity of the valve during normal water supply, and satisfactory water cannot be supplied. In addition, the veteran is not the only person who manages utilities, so even inexperienced people should be able to open and close valves accurately and reliably. Therefore, each valve of the three-way valve 120 must be opened and closed accurately and reliably even if the person in charge of handling it is inexperienced even if the lighting etc. are insufficient even in an extremely narrow space. Don't be.

  In the case of a water supply device using a ball valve, as a general feature of the ball valve, the flow path area can be increased, and the flow resistance is low because there are no obstacles in the flow path. However, when the rotational angle position of the valve body is not appropriate, a step is formed at the joint between the flow path of the valve box and the flow path of the valve body, and flow resistance occurs there. For example, a valve box in which flow paths are formed in two opposing directions (i.e., first and second flow paths are formed linearly), and a third flow path is formed in a direction orthogonal to the two directions; A three-way valve having a configuration that includes a valve body that arbitrarily connects a third flow path that rotates in the valve box and that is orthogonal to the first and second flow paths in two directions facing each other is assumed. In this three-way valve, the basic state is a state in which three flow paths, in which the fluid flows from the first and second flow paths facing each other and flows out to the third flow path, are connected, and the flow resistance at this time is reduced. Is the most important.

  On the other hand, in a ball valve, a stopper is often provided at a position rotated to the rightmost (clockwise direction) and a position rotated to the leftmost (counterclockwise direction). As shown in FIG. 2, in the water supply apparatus 100 having a configuration in which the three-way valve 120 is arranged on the water distribution side, the position where the first pump 101 side is closed and the position where the second pump 102 side is closed correspond to this. Therefore, the angle at which the rotational angle position of the valve body must be set most accurately is the position between the position rotated to the right and the position rotated to the left. However, since the angle can be freely adjusted at this rotational angle position, a step is likely to occur at the joint between each flow path of the valve box and the valve body as described above.

  Moreover, the wrench which operates the three-way valve 120 is removed at the position where the first flow path on the first pump 101 side of the three-way valve 120 is closed or the second flow path on the second pump 102 side is closed (pump maintenance is performed). Therefore, after closing, the wrench naturally gets in the way, so remove it), and refit the wrench after maintenance. As a result, the first, second, and third flow paths are brought into communication with each other. At this time, if the fitting direction of the wrench is wrong by 180 degrees, the stopper on the wrench side is not brought into contact with the original contact surface. In other words, a portion that is not the abutting surface of the oppositely opposite stopper comes into contact with the fixed block. For this reason, there exists a problem that the angle of a valve body will be set accidentally.

  The present invention has been made in view of the above points, and provides a three-way valve capable of opening and closing each valve accurately and reliably even in a narrow place where illumination is not sufficient, and a water supply device including the three-way valve. Objective. In addition, when the wrench is fitted again after maintenance and the three flow paths are made to communicate with each other, the three-way valve and the three-way valve are not misplaced by 180 degrees. An object is to provide a water supply apparatus provided.

  In order to solve the above problems, the present invention provides a valve box in which first and second flow paths are formed in directions opposite to each other, and a third flow path is formed in a direction orthogonal to the facing direction, A valve body that can rotate within the valve box and selectively communicates the first, second, and third flow paths, and a valve that can rotate integrally with the valve body and protrudes outside the valve box A rod, a fixed block fixed to the valve box, a valve-side stopper that rotates integrally with the valve rod and can come into contact with the fixed block by the rotation of the valve rod, and detachable from the valve rod A valve opening and closing wrench for rotating the valve stem, and a valve fitted to the valve opening and closing wrench at a specific angle in the rotation direction of the valve stem at the end of the valve stem A rod-side fitting portion is provided, and the fixed block is configured such that the valve body is in a state where the two flow paths in the facing direction are communicated with each other. The valve is brought into contact with a wrench-side stopper provided on the valve opening / closing wrench when it is rolled, and only one direction of the first and second channels is in communication with the third channel. The three-way valve is configured to contact the valve-side stopper when the body rotates.

A valve box having first, second, and third flow paths; a valve body that can arbitrarily communicate the three flow paths; and a valve rod that protrudes from the valve box and can rotate with the valve body;
A fixed block provided in the valve box, a valve-side stopper that can rotate together with the valve stem and can come into contact with the fixed block as the valve stem rotates, and a removable valve for rotating the valve stem An opening / closing wrench, and an end of the valve stem is formed as a valve stem-side fitting portion, and the valve stem-side fitting portion opens and closes the valve when the valve stem is at a predetermined rotational angle position. The fixed block can be fitted with a wrench for the valve, in a position where it abuts a wrench-side stopper attached to the valve opening / closing wrench when the three flow paths communicate with each other, and A three-way valve, characterized in that either one of the first flow path and the second flow path is provided at a position where it comes into contact with the valve-side stopper when communicating with the third flow path. is there.

  Further, the present invention is the above-mentioned three-way valve, wherein two surfaces of the wrench-side stopper that contact the fixed block are provided symmetrically in the left-right direction as viewed in the rotation axis direction of the valve rod, Two surfaces that come into contact with the fixed block are provided symmetrically in the left-right direction as viewed in the direction of the axis of rotation of the valve stem.

  Further, the present invention is any one of the above three-way valves, wherein the valve opening / closing wrench includes a wrench side fitting portion that fits the valve stem side fitting portion, a handle, and the wrench side fitting portion. And a shaft for connecting the handle, the handle showing a display indicating a flow path in at least one direction of the opposed first and second flow paths, and closing the displayed flow path And a display indicating a direction in which the handle is rotated.

  Further, the present invention is any one of the above three-way valves, wherein the valve opening / closing wrench is a T-type wrench, and the wrench side fitting portion is fitted to the valve stem side fitting portion, When the handle and the facing direction are made parallel, the valve body has an angle connecting the first flow path and the second flow path.

  Further, according to the present invention, two surfaces of the wrench-side stopper that contact the fixed block are provided at two positions symmetrical with respect to a plane including the rotation axis of the valve rod, and the wrench-side stopper contacts the fixed block of the valve-side stopper. The contacting surface is also a three-way valve characterized by being provided at two positions symmetrical with respect to the plane including the rotation axis of the valve stem.

  The present invention also provides a cabinet having an openable / closable opening surface, two pumps positioned on the opening surface side in the cabinet and having discharge ports in a direction opposite to the opening surface, and the two units. A pipe for guiding the flow path from the discharge port of the pump in a direction opposite to each other, and each of the pipe lines to the first and second flow paths facing each other of the three-way valve of the three-way valve. The two pumps are arranged so that a gap is formed between the two pumps when viewed from the opening surface side, and the valves are opened and closed via the gap between the two pumps from the opening surface side. The water supply device is characterized in that a wrench and the valve stem are detachable.

  Further, the present invention provides a valve box in which first and second flow paths are formed in directions opposite to each other, and a third flow path is formed in a direction orthogonal to the opposing direction, and can be rotated in the valve box. The valve body communicating arbitrarily with the first to third flow paths, the valve body which can rotate integrally with the valve body and protrudes to the outside of the valve box, and is fixed to the valve box A fixed block, a valve-side stopper that rotates integrally with the valve stem and can come into contact with the fixed block by the rotation of the valve stem, and a pressing mechanism that presses a predetermined pressing member against the valve stem by a spring force A depression is provided on a side surface of the valve stem, and the pressing member is fitted into the depression when the valve body rotates in a state where the opposed first flow path and the second flow path are communicated with each other. And only one of the first and second channels is connected to the third channel. Said valve body when rotated, a three-way valve which is characterized by being configured to abut with the valve-side stopper.

  The three-way valve according to the present invention includes a fixed block fixed to the valve box, a valve-side stopper that can rotate integrally with the valve stem, and can come into contact with the fixed block by the rotation of the valve stem, and is detachable from the valve stem. A valve opening / closing wrench for rotating the valve stem, and the end of the valve stem protruding to the outside of the valve box is fitted with the valve opening / closing wrench at a specific angle in the rotation direction of the valve stem. And a fixed block is in contact with a wrench-side stopper provided on the valve opening / closing wrench when the valve body rotates in a state where the opposing two-way flow paths communicate with each other, Since the valve body is configured to come into contact with the valve-side stopper when the first and second flow paths are in communication with only the flow path in one direction and the third flow path, in a narrow space, Providing a three-way valve that allows even inexperienced workers to easily and accurately open and close the valve. That. Further, since the three-way valve is opened and closed accurately and reliably, pressure loss due to incomplete opening of the valve is eliminated, and an energy-saving three-way valve can be provided.

  The handle has a display indicating a flow path in at least one direction of the first and second flow paths facing each other and a display indicating a direction in which the handle is rotated when the displayed flow path is closed. Therefore, it is possible to provide a three-way valve that does not mistake the fitting direction of the wrench by 180 degrees when the wrench is fitted again after the maintenance and the three flow paths are connected.

  As described above, the opening and closing of the three-way valve can be performed accurately, reliably and easily in a narrow space. By using this three-way valve in the water supply device housed in the cabinet, a pump requiring maintenance and inspection can be installed in the cabinet. It becomes possible to arrange the three-way valve on the back side of the pump by arranging it on the open / close door side, and it is possible to provide a water supply device that facilitates maintenance and inspection of the pump. In addition, since the valve can be opened and closed accurately and reliably in a narrow space, the cabinet of the water supply apparatus can be downsized, and a water supply apparatus that can be installed even when the installation volume is small and can be easily installed can be provided.

It is a figure which shows the structural example of the conventional water supply apparatus. It is a figure which shows the structural example of the water supply apparatus using the three-way valve which concerns on this invention. It is a figure which shows the structural example of the water supply apparatus accommodated in the cabinet using the three-way valve which concerns on this invention, Fig.3 (a) is a top view which abbreviate | omitted the top plate, FIG.3 (b) excludes an opening / closing door. FIG. It is a figure which shows the example of an external appearance structure of the three-way valve which concerns on this invention, Fig.4 (a) is a top view, FIG.4 (b) is a front view. It is a figure which shows the structural example of the T-type wrench used for opening / closing operation | movement of the three-way valve based on this invention, FIG.5 (a) is the figure seen from the fitting part, FIG.5 (b) is a top view, 5 (c) is a front view. It is a figure for demonstrating opening and closing of the three-way valve which concerns on this invention, FIG. 6-1 (a) is a three-way valve, FIG. 6-1 (b) is a figure which shows the open / close state of each flow path of a three-way valve. 6-1 (c) is a diagram showing a handle lever of the wrench. It is a figure for demonstrating opening and closing of the three-way valve which concerns on this invention, FIG. 6-2 (a) is a three-way valve, FIG. 6-2 (b) is a figure which shows the opening-and-closing state of each flow path of a three-way valve. FIG. 6C is a view showing the handle lever of the wrench. It is a figure for demonstrating opening and closing of the three-way valve which concerns on this invention, FIG. 7-1 (a) is a three-way valve, FIG. 7-1 (b) is a figure which shows the opening-and-closing state of each flow path of a three-way valve. FIG. 7C is a diagram illustrating a handle lever of the wrench. It is a figure for demonstrating opening and closing of the three-way valve which concerns on this invention, FIG. 7-2 (a) is a three-way valve, FIG. 7-2 (b) is a figure which shows the opening-and-closing state of each flow path of a three-way valve. FIG. 7C is a diagram showing the handle lever of the wrench. It is a figure which shows the cross-sectional shape example of the valve stem of the three-way valve concerning this invention, Fig.8 (a) is a case of a deformation | transformation hexagon, FIG.8 (b) is a case of a rectangle, FIG.8 (c). Is the shape of a combination of straight lines and curves. It is a figure which shows the example of an external appearance structure of the three-way valve which concerns on this invention, Fig.9 (a) is a top view of a three-way valve, FIG.9 (b) is a front view of a three-way valve, FIG.9 (c) is FIG.9 (a). FIG. It is a conceptual diagram explaining the communication state of each flow path in the valve box 11, and FIG. 10 (a) shows a state where the first flow path 11a, the second flow path 11b, and the third flow path 11c are all in communication. FIG. 10B shows a state where only the second flow path 11b and the third flow path 11c are in communication, and FIG. 10C shows only the first flow path 11a and the third flow path 11c in communication. It shows the state. It is a perspective view which shows the three-way valve and T type wrench which concern on one Embodiment of this invention. It is the schematic explaining the case where a T type wrench fits 180 degrees, and Drawing 12 (a) shows the state fitted normally, and Drawing 12 (b) fitted 180 degrees. FIG. 12 (c) shows a state in which the valve rod is rotated counterclockwise from the state of FIG. 12 (b).

  Hereinafter, an embodiment of the present invention will be described in detail. 4A and 4B are diagrams showing an external configuration example of the three-way valve 10 according to the present invention. FIG. 4A is a plan view of the three-way valve 10, and FIG. 4B is a front view of the three-way valve 10. The three-way valve 10 includes a valve box 11 and a valve body (not shown) housed in the valve box 11. Although not shown in the figure, the valve box 11 has first and second flow paths formed in two opposing directions, and a third flow path formed in a direction orthogonal to the two directions. Reference numeral 11a is a fluid inlet of the first channel, reference numeral 11b is a fluid inlet of the second channel, and reference numeral 11c is a fluid outlet of the third channel. The valve body rotates within the valve box 11 and can selectively (arbitrarily) communicate / close the three flow paths including the first to third flow paths. FIG. 10 is a conceptual diagram for explaining the communication state of each flow path in the valve box 11, and FIG. 10 (a) shows that the first flow path 11a, the second flow path 11b, and the third flow path 11c are all in communication. FIG. 10 (b) shows a state where only the second flow path 11b and the third flow path 11c are in communication, and FIG. 10 (c) shows the first flow path 11a and the third flow path 11c. Only the state where it communicates is shown.

  In FIG. 4, reference numeral 12 can rotate integrally with the valve body, is a valve rod protruding outside the front of the valve box 11, and reference numeral 13 is a fixed block fixed to the valve box 11. The end of the valve stem 12 that protrudes to the outside of the valve casing 11 has a polygonal cross section that fits into a fitting portion (wrench-side fitting portion) of a T-wrench described later at a specific angular position in the rotational direction of the valve stem 12. A hexagonal fitting portion (valve stem side fitting portion) 12a is provided. The opposite sides of the fitting portion 12a having a hexagonal cross section are parallel and have the same length, the two sets of sides have the same length, and the other set is longer than the length of the other set of two sides. It has become. That is, it is a deformed hexagon. Reference numeral 14 denotes a valve-side stopper that rotates integrally with the valve stem 12 and contacts the fixed block 13 under predetermined conditions by the rotation of the valve stem 12. Here, two surfaces of the valve-side stopper 14 that come into contact with the fixed block 13 are provided symmetrically in the left-right direction as viewed in the rotation axis direction of the valve rod. In other words, two surfaces of the valve-side stopper 14 that are in contact with the fixed block 13 are provided at two positions that are plane-symmetric with respect to a plane including the rotation axis of the valve rod.

  FIG. 5 is a view showing a configuration example of a T-type wrench for rotating the valve stem 12, FIG. 5 (a) is a view seen from the fitting portion, FIG. 5 (b) is a plan view, and FIG. ) Is a front view. The T-type wrench 20 includes a wrench-side fitting portion 21 formed with a concave fitting portion 21a into which the fitting portion 12a having a polygonal cross section of the valve rod 12 is fitted, a rod-like handle lever 22, and the wrench side. The fitting portion 21 and a shaft 23 that couples the handle lever 22 are included. The T-type wrench 20 is provided with a wrench-side stopper 24. Two surfaces of the wrench-side stopper 24 that come into contact with the fixed block 13 are provided symmetrically in the left-right direction as viewed in the rotational axis direction of the valve stem. In other words, two surfaces of the wrench-side stopper 24 that are in contact with the fixed block 13 are provided at two positions symmetrical with respect to a plane including the rotation axis of the valve stem.

  FIG. 11 is a perspective view of the three-way valve 10 and the T-type wrench 20. As can be seen from this figure, when communicating / closing the flow paths 11a, 11b, and 11c of the three-way valve 10, the T-type wrench 20 is directed horizontally and fitted to the valve stem 12 of the three-way valve. It will be done together.

Next, the opening / closing operation of the three-way valve 10 will be described with reference to FIGS. 6-1, 6-2, 7-1, and 7-2. In addition, since the piping structure of the water supply apparatus using this three-way valve 10 and the arrangement | positioning structure in the cabinet of a water supply apparatus are the same as FIG.2 and FIG.3, the description is abbreviate | omitted. FIGS. 6-1 and 6-2 are explanatory views when the first pump 101 (see FIG. 2) is stopped without stopping the water supply, and FIGS. 7-1 and 6-2 are the second without stopping the water supply. It is explanatory drawing in the case of stopping the pump 102 (refer FIG. 2). Before the first pump 101 is stopped, both the first pump 101 and the second pump 102 are in operation, so that the three-way valve 10 is as shown in FIG. 6A (see FIG. 4). the same). As a result, as shown in FIG. 6B, all of the first pump side valve V1, the second pump side valve V2, and the water distribution side valve V3 are opened. In the following description, it is assumed that the three-way valve 10 is provided with three valves V1, V2, and V3 for convenience of explanation. However, there is a configuration in which communication / closing of the three flow paths is switched using one valve body, and the present invention is intended to include such a configuration within the scope of the right.
[When stopping the first pump 101]
From the state shown in FIG. 6-1 (a) in which all the three valves V1, V2, and V3 are open, the valve necessary to stop the first pump 101 is closed by closing the first pump-side valve V1. If the 2nd pump side valve V2 is opened and the water distribution side valve V3 is made into the open state, there will be no trouble in water supply. First, when all of the first pump-side valve V1, the second pump-side valve V2, and the water distribution-side valve V3 of the three-way valve 10 are open, as shown in FIG. As for the fitting part 12a, the long sides 12b and 12c of the hexagonal cross section are located up and down mutually. When the fitting portion 21a of the fitting portion 21 of the T-type wrench 20 is fitted to the fitting portion 12a of the valve stem 12 in this state, the handle lever 22 of the T-type wrench 20 is not in the horizontal position. The mold wrench 20 does not fit (match) the valve stem 12. This is because the longitudinal direction of the hexagon of the valve stem 12 is parallel to the longitudinal direction of the hexagon formed in the fitting portion 21a of the T-wrench, and the longitudinal direction of the handle lever 22 is also parallel to these longitudinal directions. It is. As shown in FIGS. 5C and 6-1C, the handle lever 22 of the T-wrench 20 has “1-stop ↓” and “2-stop ↑” at both ends in the longitudinal direction (left and right). "Is engraved (engraved). These indications are engraved in a state where one is rotated 180 degrees with respect to the other, and the fitting portion 21a of the fitting portion 21 of the T-wrench 20 is fitted to the fitting portion 12a of the valve stem 12. In this case, the character “1-stop ↓” is in a normal direction (the character is facing upward). On the other hand, the character “2-stop ↑” is in the opposite direction (the upper side of the character is facing down).

  If the first pump 101 is stopped as described above, the first flow path is closed. However, the handle lever 22 is moved horizontally so that the letters “1-stop ↓” can be read in a normal direction. You can do it. Accordingly, the “1-stop ↓” display is necessarily positioned on the left side of the handle lever 22 of the T-type wrench 20. For this reason, you may remember to bring the one with the number of the pump you want to stop on the left side in the horizontal direction. In addition, it is only necessary to remember that the handle lever 22 should be set so that the number of the pump to be stopped can be read in a normal direction. For this reason, it is very easy to correctly perform the intended opening / closing operation of the three-way valve. After the handle lever 22 is set as shown in FIG. 6-1 (c), the handle lever 22 is rotated in the direction indicated by the arrow engraved on the left side (rotated counterclockwise), and the valve-side stopper 14 becomes the three-way valve. Rotate until 10 fixed blocks 13 abut. The position where the valve-side stopper 14 abuts against the fixed block 13 of the three-way valve 10 (see FIG. 6-2 (a)) is the fully closed rotational position of the first pump-side valve V1. At this time, the handle lever 22 of the T-type wrench 20 is in a state as shown in FIG.

  On the other hand, with the display of “1-stop ↓” on the left side of the handle lever 22 in a normal orientation, the handle lever 22 was tried to rotate in the direction opposite to the left arrow (clockwise). Assume a case. In this case, if no contrivance is applied to the three-way valve 10 or the T-type wrench 20, the valve stem 12 rotates in the clockwise direction, and the second pump side valve V2 is closed. However, in this case, the wrench-side stopper 24 attached to the T-type wrench 20 is in contact with the fixed block 13 fixed to the valve box 11 as shown in FIG. This prevents rotation in the reverse direction (clockwise direction). Therefore, when it is desired to stop the first pump 101, the handle lever 22 of the T-type wrench 20 is leveled when the first pump-side valve V1 is closed, and the “1-stop ↓” display can be read normally. Thus, if the fitting part 21a of the fitting part 21 of the T-type wrench 20 is fitted into the polygonal (hexagonal) fitting part 12a of the valve stem 12 and rotated until the handle lever 22 stops in a rotatable direction. (See FIGS. 6-2 (a) and 6-2 (c)) and FIG. 6-2 (b), the first pump side valve V1 is completely closed, and the second pump side valve V2 and the water distribution side The valve V3 is opened.

When the first pump side valve V1 of the three-way valve 10 is closed, the T-type wrench 20 is removed, the working space is widened, the first water supply side valve 103 (see FIG. 2) is closed, and the first pump 101 is repaired. Do. When the repair is completed, the fitting portion 21 a of the fitting portion 21 of the T-wrench 20 is fitted into the polygonal (hexagonal) fitting portion 12 a of the valve stem 12. As a result, the handle lever 22 of the T-wrench 20 is as shown in FIG. By rotating the handle lever 22 in the opposite direction (clockwise) until the wrench-side stopper 24 comes into contact with the fixed block 13, the initial state shown in FIG. Accordingly, as shown in FIG. 6B, all of the first pump side valve V1, the second pump side valve V2, and the water distribution side valve V3 are opened. Also in this case, the wrench-side stopper 24 contacts the fixed block 13, and the handle lever 22 cannot be rotated in the opposite direction. For this reason, all the valves V1, V2, and V3 are stopped at a rotational position where they are appropriately opened.
[When stopping the second pump 102]
Next, a case where the second pump 102 is stopped and repaired due to a failure or the like is described. Before stopping the second pump 102, both the first pump 101 and the second pump 102 are in an operating state, so the three-way valve 10 is as shown in FIG. 7-1 (a) (FIG. 6-1 (a )Same as). As a result, as shown in FIG. 7-1 (b), all of the first pump side valve V1, the second pump side valve V2, and the water distribution side valve V3 are open.

  From the state shown in FIG. 7-1 (a) in which all the three valves V1, V2, and V3 are opened, the valves V1, V2, and V3 necessary for stopping the second pump 102 are opened and closed on the second pump side. If the valve V2 is closed, the first pump side valve V1 is opened, and the water distribution side valve V3 is opened, there is no problem in water supply. First, when all of the second pump side valve V2, the first pump side valve V1 and the water distribution side valve V3 of the three-way valve 10 are open, the long side 12b having a hexagonal cross section of the fitting portion 12a of the valve rod 12 is used. 12c are positioned one above the other. When fitting the fitting portion 21a of the fitting portion 21 of the T-type wrench 20 into the fitting portion 12a of the valve stem 12 in this state, the handle lever 22 of the T-type wrench 20 must be in the horizontal position. The T-type wrench 20 does not fit (match) the valve stem 12.

  On the handle lever 22 of the T-type wrench 20, as shown in FIG. 7-1 (c), “2-stop ↑” and “1-stop ↑” are engraved (engraved). These indications are engraved with one of them rotated 180 degrees with respect to the other. When the second pump 102 is stopped (the second flow path is closed), the characters “2-stop ↑” are displayed. The fitting portion 12a of the valve stem 12 is fitted to the fitting portion 21a of the fitting portion 21 of the T-type wrench 20 so as to have a normal orientation (the upper side of the character is facing upward).

  As described above, if the second pump 102 is to be stopped, the handle lever 22 may be set so that the characters “2-stop ↑” can be read in a normal direction. This will inevitably place “2-stop ↑” on the left side of the handle lever 22 of the T-wrench 20, so remember to bring the one with the number of the pump to be stopped on the left side. Also good. Moreover, it is only necessary to remember that the handle lever 22 should be set so that the number of the pump to be stopped can be read in a normal direction, and the opening / closing operation of the three-way valve becomes extremely easy. After setting the handle lever 22 in this way, the handle lever 22 is rotated in the direction indicated by the left arrow (clockwise in FIG. 7-1 (c)), and as shown in FIG. The valve-side stopper 14 is rotated until it comes into contact with the fixed block 13 of the three-way valve 10. As shown in FIG. 7B, the rotational angle position at which the valve-side stopper 14 contacts the fixed block 13 of the three-way valve 10 is such that the first pump-side valve V1 is open and the second pump-side valve V2 is completely The closed and water distribution side valve V3 is in the open position.

  On the other hand, the handle lever 22 is displayed in the state of “2-stop ↑” (the state shown in FIG. 7-1 (a)) and the three-way valve 10 and the T-type wrench 20 are not devised. If 22 is rotated in a direction opposite to the left arrow (counterclockwise direction), the first pump-side valve V1 is closed. However, in this case, as shown in FIG. 7-1 (a), the wrench-side stopper 24 attached to the T-type wrench 20 contacts the fixed block 13 fixed to the valve box 11, and the reverse direction (counterclockwise) Direction) cannot be rotated. Accordingly, when it is desired to stop the second pump 102, the handle lever 22 of the T-type wrench 20 is leveled when the second pump side valve V2 is closed. Then, the fitting portion 21a of the fitting portion 21 of the T-type wrench 20 is fitted into the polygonal (hexagonal) fitting portion 12a of the valve stem 12 so that the indication “2-stop ↑” can be read normally. . From this state, if the handle lever 22 is rotated in a rotatable direction until it stops (see FIGS. 7-1 (a) and 6-2 (c)), the second state as shown in FIG. The pump side valve V2 is completely closed, and the first pump side valve V1 and the water distribution side valve V3 are opened.

  When the second pump side valve V2 of the three-way valve 10 is closed, the T-type wrench 20 is removed, the working space is widened, the second water supply side valve 104 (see FIG. 2) is closed, and the second pump 102 is repaired. Do. When the repair is completed, the handle lever 22 of the T-type wrench 20 is fitted by fitting the fitting part 21a of the fitting part 21 of the T-type wrench 20 into the polygonal (hexagonal) fitting part 12a of the valve stem 12. The state shown in FIG. 7-2 (c) is obtained. From this state, the handle lever 22 is rotated in the opposite direction (counterclockwise direction) until the wrench-side stopper 24 comes into contact with the fixed block 13 to obtain the state shown in FIG. Then, as shown in FIG. 7-1 (b), the first pump side valve V1, the second pump side valve V2, and the water distribution side valve V3 are all opened. Also in this case, the valve-side stopper 14 contacts the fixed block 13 and prevents the handle lever 22 from rotating further in the opposite direction (counterclockwise direction) from the state of FIG.

  As described above, if the three-way valve 10 is used in the water supply device, the T-wrench 20 can be used even when the first pump 101 or the second pump 102 is maintained or inspected even in a very narrow space in the cabinet 130. Even if an inexperienced worker is engaged with the valve stem 12 in a state where the number indicating the number of the valve to be closed displayed on the handle lever 22 is in a normal direction, and rotated. The first pump side valve V1 or the second pump side valve V2 can be opened and closed accurately and reliably. In addition, although the example which attached this three-way valve 10 to the water supply apparatus 100 was shown in the said embodiment, the use and opening-and-closing means of this three-way valve 10 are not limited to a water supply apparatus. That is, it can be used for piping for supplying a liquid other than water, and further, can be used for piping for conveying powder having fluidity.

  As described above, in the present embodiment, the position of the valve rod 12 that rotates integrally with the valve body is the rightmost position (clockwise direction) and the leftmost position (counterclockwise direction). The fixed block 13 and the wrench side stopper 24 are in contact with each other to prevent the valve stem 12 from rotating further. However, since the valve stem 12 itself must be turned in any direction from the position where it is prevented from turning in order to switch the open / closed state of the valves V1, V2, the wrench side stopper 24 (which is a stopper) It is an essential condition that it is possible to select whether the detachable or the T-type wrench 20 itself is detachable. In order to realize this, in this embodiment, the T-type wrench 20 itself is detachable from the valve stem 12.

  Further, as described above, the T-type wrench 20 is removed while the first pump side valve V1 or the second pump side valve V2 is closed, and maintenance of the first pump or the second pump is performed. Then, after the maintenance is completed, the T-type wrench 20 is fitted to the valve rod 12 again so that all the first to third flow paths communicate with each other. At this time, however, the handle lever 22 of the T-type wrench 20 may be fitted to the valve stem 12 in a state where the direction of the handle lever 22 is shifted by 180 degrees. FIG. 12 is a diagram of a three-way valve for explaining this. And in order to help an understanding, the arrow is attached | subjected to the fitting part 21a of the fitting part 21 of the T-type wrench 20, and the angle position of the fitting part 21a is known.

  Here, FIG. 12A shows the same state as FIG. 6-2A. That is, the state of the three-way valve 10 when the first pump side valve V1 is closed and the second pump side valve V2 is open is shown. This is a state where the fitting state between the valve stem 12 and the T-shaped wrench 20 is appropriate. On the other hand, FIG. 12B shows a case where the T-type wrench 20 is fitted to the valve stem 12 in a state where the direction of the handle lever 22 is shifted by 180 degrees. Even in this case, since the valve-side stopper 14 comes into contact with the contact surface 13b on the opposite side of the fixed block 13, the valve stem 12 cannot be rotated in the clockwise direction. Conversely, it can be rotated counterclockwise as shown in FIG. However, the wrench-side stopper 24 comes into contact with the fixed block 13, and the angle of the valve body is set erroneously at a certain rotation angle position (a position rotated about 35 ° counterclockwise in FIG. 12C). . That is, since the handle lever 22 stops at an angular position that is considerably different from the horizontal, it can be noticed that the fitting direction is opposite depending on the angle of the handle lever 22. In order to clarify this action, it is important that the distance between the two contact surfaces 13a and 13b with which the wrench-side stopper 24 of the fixed block 13 abuts is large and that the wrench-side stopper 24 is thick. Here, the thickness of the wrench-side stopper 24 is, for example, in FIG. 12C, the surface of the wrench-side stopper 23 that contacts the fixed block 13 and the surface opposite to the wrench-side stopper 24 that is parallel to this surface. This is the distance indicated by the symbol T in the figure.

  Further, in the above embodiment, the cross-sectional shape of the fitting portion 12a of the valve stem 12 is a hexagonal cross-sectional shape as shown in FIG. 8A, but the present invention is not limited to this, for example, A rectangular shape as shown in FIG. 8B or a chamfered circular shape as shown in FIG. 8C may be used. In short, if the handle lever 22 of the T-wrench is in a horizontal position and the letters “1-stop ↓” or “2-stop ↑” can be fitted to the valve stem so that it can be seen normally in the vertical direction, Good.

  Moreover, although the said embodiment demonstrated the case where the three-way valve 10 was installed in the downstream of each pump (1st pump 101 and 2nd pump 102) of the water supply apparatus 100, it installed in the upstream of each pump of the water supply apparatus 100. It can also be applied to

  FIG. 9 is a diagram showing another external configuration example of the three-way valve according to the present invention. FIG. 9 (a) is a plan view of the three-way valve, FIG. 9 (b) is a front view of the three-way valve, and FIG. It is AA sectional drawing. A recess 15 is provided in the valve stem 12, which is a shaft connected to the ball valve. A mechanism for pressing a ball 17 as a pressing member against the valve stem 12 by a spring 16 is provided at the same position in the length direction of the recess 15 and the valve stem 12. The valve body and the valve stem 12 are adjusted so that the ball 17 fits into the recess 15 at a position where the ball valve of the three-way valve 10 communicates with all three flow paths of the first to third flow paths. With such a configuration, when closing one of the opposing first or second flow paths, the valve rod 12 can be turned firmly until the fixed block 13 and the valve-side stopper 14 come into contact with each other. .

  Further, when the three flow paths of the first to third flow paths are communicated, the resistance of rotating the valve rod 12 by the ball 17 fitting in the recess 15 changes, so that the valve body is in an accurate position without fluid resistance. Can be determined. In the case of this configuration, the wrench-side stopper 24 is not necessary, and the length of the fixed block 13 extending in parallel with the rotation axis direction of the valve rod 12 can be shortened accordingly. In addition, even when the handle for rotating the valve stem 12 is fixed to the tip of the valve stem 12 without using the T-type wrench 20, the valve body can be accurately operated.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. Note that any shape or structure not directly described in the specification and drawings is within the technical scope of the present invention as long as the effects of the present invention are achieved.

  For example, in the embodiment described above, the first flow path and the second flow path are in a mutually corresponding relationship, in other words, the case where the two flow paths are positioned in a straight line. However, even in the case of a valve box in which the three channels are evenly directed at an angular interval of 120 °, the communication / closing of each channel is switched by rotation of 120 °, and the valve side stopper or The same effect can be obtained by setting the wrench-side stopper so as to contact the fixed block.

  The present invention is composed of a fixed block fixed to a valve box, a valve side stopper that rotates integrally with the valve stem, and contacts the fixed block by the rotation of the valve stem, and the valve stem is detachable, and rotates the valve stem. A valve opening / closing wrench for causing the valve stem to protrude to the outside of the valve box, and provided with a fitting portion that fits the valve opening / closing wrench at a specific angle in the rotation direction of the valve stem, The fixed block abuts against a wrench-side stopper provided on the valve opening / closing wrench when the valve body rotates in a state where the two opposing flow paths are connected, and the fixed block is in one direction of the first and second flow paths. Even when inexperienced workers in a small space, the valve can be opened and closed because it is configured to contact the valve-side stopper when the valve body rotates with only the flow path and the third flow path connected. As a three-way valve that can be easily and accurately executed, the valve is opened and closed accurately and reliably. And eliminates the pressure loss due to incomplete opening of the valve, it can be utilized as a three-way valve for energy saving.

DESCRIPTION OF SYMBOLS 10 Three-way valve 11 Valve box 12 Valve rod 13 Fixed block 14 Valve side stopper 15 Depression 16 Spring 17 Ball 20 T type wrench 21 Fitting part 22 Handle lever 23 Shaft 24 Wrench side stopper

Claims (7)

A three-way valve,
A valve box having first, second and third flow paths;
A valve body capable of selectively communicating the three flow paths;
A valve stem that protrudes from the valve box and can rotate with the valve body;
A fixed block provided in the valve box;
A valve-side stopper that can rotate together with the valve stem and can abut on the fixed block as the valve stem rotates;
A removable valve opening / closing wrench for rotating the valve stem,
An outer end portion of the valve stem is formed as a valve stem side fitting portion, and the valve stem side fitting portion can be fitted with the valve opening / closing wrench when the valve stem is at a predetermined rotational angle position. Yes,
The fixed block is positioned so as to contact a wrench-side stopper attached to the valve opening / closing wrench when the three flow paths communicate with each other, and the first flow path or the second flow path. The three-way valve is provided at a position so as to come into contact with the valve-side stopper when any one of them communicates with the third flow path. A valve box in which first and second flow paths are formed in directions facing each other, and a third flow path is formed in a direction perpendicular to the facing direction;
A valve body capable of rotating in the valve box and selectively communicating the first, second and third flow paths;
A valve stem that can rotate integrally with the valve body and protrudes to the outside of the valve box;
A fixed block fixed to the valve box;
A valve-side stopper that rotates integrally with the valve stem and can come into contact with the fixed block as the valve stem rotates;
It is configured to be detachable with respect to the valve stem, and has a valve opening / closing wrench for rotating the valve stem,
On the outer end of the valve stem, there is provided a valve stem side fitting portion that fits with the valve opening / closing wrench at a specific angle in the rotation direction of the valve stem,
The fixed block abuts against a wrench-side stopper provided on the valve opening / closing wrench when the valve body rotates in a state where the two flow paths in the opposing direction communicate with the third flow path. And when the said valve body rotates in the state where only the flow path of one direction among the 2nd flow paths and the said 3rd flow path were connected, it was comprised so that it might contact | abut with the said valve side stopper. Three-way valve to do. The three-way valve according to claim 1 or 2,
Two surfaces of the wrench-side stopper that come into contact with the fixed block are provided symmetrically in the left-right direction as viewed in the rotational axis direction of the valve stem,
The three-way valve is characterized in that two surfaces of the valve-side stopper that come into contact with the fixed block are provided symmetrically in the left-right direction as viewed in the rotation axis direction of the valve stem. The three-way valve according to claim 1 or 2,
Two surfaces of the wrench-side stopper that come into contact with the fixed block are provided at two positions symmetrical with respect to a plane including the rotation axis of the valve stem,
The three-way valve characterized in that two surfaces of the valve-side stopper that come into contact with the fixed block are also provided at two positions symmetrical with respect to a plane including the rotation axis of the valve stem. The three-way valve according to any one of claims 1 to 4,
The valve opening / closing wrench is:
A wrench-side fitting portion to be fitted with the valve stem-side fitting portion;
A handle,
A shaft connecting the wrench-side fitting portion and the handle;
The handle has a display indicating a flow path in at least one direction of the first and second flow paths, and a display indicating a direction in which the handle is rotated when the displayed flow path is closed. Three-way valve to do. The three-way valve according to claim 5,
The first and second flow paths are formed in directions facing each other,
The valve opening / closing wrench is a T-type wrench, and when the wrench-side fitting portion is fitted to the valve stem-side fitting portion so that the handle and the facing direction are parallel, the valve body is The three-way valve is characterized in that the angle is such that the first flow path and the second flow path communicate with each other. A cabinet with an openable opening surface;
Two pumps located on the opening surface side in the cabinet and having discharge ports in a direction opposite to the opening surface;
A conduit that guides the flow paths from the discharge ports of the two pumps in mutually opposing directions;
Each said pipe line is connected to the said 1st and 2nd flow path of the three-way valve as described in any one of Claims 1-5 , A clearance gap is mutually seen when seeing the said 2 pumps from the said opening surface side. The water supply device is characterized in that the valve opening / closing wrench and the valve rod are detachable from the opening surface side through a gap between the two pumps while being arranged so as to be formed.

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