JP2017071949A - Constant water level valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constant water level valve device capable of stably turning a shaft.SOLUTION: A constant water level valve device 10 of this invention includes: a main body 10A having a water discharge port 12 for discharging water fed through a pilot pipe into a water storage tank, and an opening and closing valve 13 for opening and closing the water discharge port; and a driving body 15 provided in the main body and driving the opening and closing valve. The driving body 15 includes a shaft 40 to which a float 42 is attached, a link mechanism 20 connected to the opening and closing valve 13 and displaced between a closing position and an opening position of the opening and closing valve, and a connecting part 50 for mutually fixing the shaft 40 and the link mechanism 20 while preventing rotation with magnets 60 and 62.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a constant water level valve device used for controlling a water level in a water storage tank such as a water receiving tank or an elevated water tank installed in an office building or a condominium.

  In general, the water tank 1 is supplied with water through a water supply valve 3 connected to a water pipe 2, and the water stored in the water tank 1 is pumped through a water supply pipe 5 (see FIG. It is sent to a predetermined consumption point (see FIG. 1). In this case, since the water level in the water storage tank decreases as it is consumed, the water supply valve 3 is released as the water is consumed so that a certain amount of water is stored. Water is supplied into the tank 1 and the water level is controlled by closing the water supply valve 3 when the water level is set in advance.

  For controlling the water level, it is known to use a constant water level valve device (sometimes referred to as a ball tap) (see, for example, Patent Documents 1 and 2). These known constant water level valve devices are connected to a water supply valve 3 through a pilot pipe 7 in a state of being installed in the water storage tank 1, as indicated by reference numeral 10 in FIGS. 3 is provided with a water outlet 12 for discharging water sent from the pilot pipe 7 through the pilot pipe 7 into the water storage tank 1, an on-off valve (not shown) for opening and closing the water outlet 12, and a driving body 15 for driving the on-off valve. ing. The driving body 15 includes a shaft 40 connected to the opening / closing valve via a link mechanism 20, and a float 42 attached to the tip of the shaft 40 and held in a state of floating in the water in the water storage tank 1. ing.

  In the above-described constant water level valve device 10, when the water level in the water storage tank 1 is lowered and the float 42 is lowered at the same time, the shaft 40 rotates counterclockwise, and the opening / closing valve is lowered via the link mechanism 20. Open the on-off valve. Then, the water stored in the pilot pipe 7 is discharged from the spout 12 into the water storage tank, whereby the water supply valve 3 is opened by reducing the pressure in the pilot pipe, and the water is stored via the inflow pipe 3a. Water is supplied into the tank 1. After that, when the water in the water storage tank 1 rises with the supply of water, the float 42 also rises, and the shaft 40 on which the float 42 is mounted rotates in the opposite direction (clockwise direction). Gradually raise the on-off valve. When the water level reaches a certain level (water supply stop water level), the on-off valve is closed and the pilot pipe 7 is filled with water, so that the water supply valve 3 is closed and the water into the water storage tank 1 is closed. Supply is stopped.

Moreover, the above-described water storage tank 1 is provided with an overflow pipe. This overflow pipe is arranged to allow the water in the water storage tank 1 to flow out to the outside when it exceeds a certain amount (predetermined overflow surface), and is configured as shown in FIG. It has become.
Here, the schematic function of the constant water level valve device 10, the configuration of the overflow pipe, and the overflow surface will be described.

  The overflow pipe is installed on the wall surface 1a of the water storage tank 1, and there are mainly two types (in FIG. 2, two types are shown, but one of them is actually installed).

  One is called a hopper type. As shown on the left side of FIG. 2, the discharge pipe 70 is inserted into the wall surface 1 a, and an end portion thereof is bent upward to install a hopper 71. The position of the opening edge 71a of the hopper 71 coincides with the overflow surface P. When the water exceeds the overflow surface P, the water is discharged from the hopper 71 through the discharge pipe 70 to the outside. The other is called a horizontal drawer system, and as shown on the right side of FIG. 2, the discharge pipe 74 is inserted into the wall surface 1a and the opening 74a is exposed as it is inside the water tank. It is. In this case, according to the Water Supply Law Enforcement Order, the center position of the opening 74a is defined as the overflow surface P. Moreover, according to the enforcement order, the spout space S (the distance from the opening edge of the spout 12 to the overflow surface P) with respect to the diameter D of the spout 12 provided in the main body 10A of the constant water level valve device 10 is: It is required to secure at least about twice the diameter D, and the diameter D1 of the discharge pipe 74 is also required to secure at least about twice the diameter D of the spout 12. That is, if the diameter D of the water outlet 12 is set to 20 mm, for example, the water outlet space S needs to be secured to 40 mm, and the diameter D1 of the opening 74a of the discharge pipe 74 needs to be secured to 40 mm.

  The position of the float 42 where the on-off valve provided in the main body 10A of the constant water level valve device 10 is closed is the water supply stop surface P1, and this water supply stop surface P1 is located below the overflow surface P. . Further, the position of the float 42 at which the on-off valve starts to release is the water supply start surface P2, and when the position of the float 42 falls below the water supply start surface P2, the on-off valve is released via the link mechanism, and the main body 10A discharges. From the water port 12, water is discharged through the pilot pipe 7.

  The water storage tank 1 is obliged to install an alarm device so that early detection is possible when a water leakage accident occurs. The alarm device 80 operates when the water level reaches a predetermined position (full water alarm position) P3 within the range between the water supply stop surface P1 and the overflow surface P, and the water level is the full water alarm position P3. If it exceeds, an alarm is issued to the outside. For example, the alarm device 80 includes two electrode bars 80a and 80b, one electrode bar 80a is installed in the water of the water storage tank 1, and the other electrode bar 80b is connected to a predetermined full water alarm position P3. Position and install so that That is, when the water level rises and reaches the electrode rod 80b, the alarm device is energized and is configured to issue an alarm to the outside.

JP 2003-342980 A JP 2011-231912 A

  As described above, the drive body 15 of the constant water level valve device 10 includes the shaft 40 connected to the on-off valve via the link mechanism 20 and the float 42 attached to the tip of the shaft 40. In this case, the pivotable range (rotatable angle) of the shaft 40 depends on the stroke of the on-off valve installed in the main body 10A of the constant water level valve device 10, and thus is specified to a constant value.

  In addition, as described above, the water outlet space S is required to secure at least about twice the diameter D of the water outlet 12. That is, since the outlet space S is widened, the distance between the overflow surface P and the water supply stop surface P1 is shortened, so that the position where the full water warning position P3 is set becomes severe. In particular, in the case of a horizontal drawer type overflow pipe (discharge pipe 74), the line P ′ from which water actually overflows (the line where water begins to flow into the discharge pipe 74) is the lowest end position 74a ′ of the opening 74a. Therefore, it is necessary to set the full water warning position P3 between the line P ′ where water overflows and the water supply stop surface P1, and the setting position becomes more severe as compared with the hopper type.

  For this reason, the position of the water supply stop surface P1 is lowered so that the setting position of the full water warning position P3 does not become severe. At present, when the constant water level valve device 10 is disposed in the water tank 1 or maintenance is performed, a long shaft 40 is installed to lower the position of the water supply stop surface P1. That is, by using a shaft that is longer than the shaft that has been used so far, the water supply stop surface P1 can be lowered by an amount corresponding to the longer distance.

  Thus, the shaft 40 has its base end fixed to the link mechanism 20 by a fixing member such as a bolt, but as described above, the float 42 floats on the surface of the water. The shaft 40 is likely to vibrate due to the influence of fluctuations in the water level at the time, and loosening occurs in the detent fixing portion at the base end portion of the shaft 40. In this case, when the rotation prevention fixing portion of the shaft 40 is loosened, the initial set position is shifted, thereby causing the water supply stop surface P1 to be displaced or the operation of the on-off valve to become unstable.

  Further, as described above, when the long shaft 40 is installed in order to lower the position of the water supply stop surface P1, handling and installation work become inconvenient, and the weight increases correspondingly due to the long shaft. The shaft itself is also easily bent (is easily vibrated). This is not preferable in consideration of the stable operation of the on-off valve.

  The present invention has been made paying attention to the above-described problems, and an object thereof is to provide a constant water level valve device capable of stably rotating a shaft.

  In order to achieve the above object, the present invention is connected to a water supply valve through a pilot pipe in a state installed in the water tank, and the water sent from the water supply valve through the pilot pipe is stored in the water tank. In the constant water level valve device that opens / closes the water supply valve by switching the internal pressure of the pilot pipe by discharging / stopping in the water, the constant water level valve device is configured to store water sent through the pilot pipe into the water storage tank. A main body having a water outlet for discharging water, and an on-off valve for opening and closing the water outlet; and a driving body provided on the main body for driving the on-off valve, and the driving body is mounted with a float. A shaft, a link mechanism connected to the on-off valve and displaced between a closed position and a release position of the on-off valve, and a link for fixing the shaft and the link mechanism against each other by magnetic force. And having a part.

  According to the constant water level valve device having the above-described configuration, the shaft mounted with the float and the link mechanism connected to the on-off valve are fixed and prevented by the coupling portion by the action of magnetic force. Even if the float vibrates or repeats vertical displacement due to the influence of fluctuations in the water level during water supply, the shaft does not loosen at the connecting portion, and the shaft can rotate stably. Therefore, the operation of the on-off valve can be performed stably, and the water supply stop surface position of the float, which is the initial set position, does not change.

  ADVANTAGE OF THE INVENTION According to this invention, the constant water level valve apparatus which can rotate a shaft stably is obtained.

Schematic which shows an example of the water tank in which the constant water level valve apparatus which concerns on this invention is installed. The figure explaining the function of the outline of a constant water level valve apparatus in the water storage tank shown in FIG. (A) is a top view of the constant water level valve device according to the present invention, (b) is a side view showing a part of the internal structure of the constant water level valve device by cutting away. (A) is a perspective view of the constant water level valve apparatus shown in FIG. 3, (b) is an exploded perspective view. The disassembled sectional view which shows the connection part which fixes a shaft and a link mechanism with rotation prevention.

  Hereinafter, an embodiment of a constant water level valve device according to the present invention will be described with reference to FIGS. 3 to 5. In these drawings, the same reference numerals are given to the portions common to the configurations shown in FIG. 1 and FIG.

  A main body 10A of the constant water level valve device 10 of the present embodiment includes a cylindrical connecting pipe 11 extending in a horizontal direction so that the pilot pipe 7 from the water supply valve 3 shown in FIG. And a cylindrical water discharge port (water discharge pipe) 12 extending in the vertical direction so as to discharge water flowing in through the water. An open / close valve 13 that reciprocates (back and forth) in the horizontal direction, for example, is disposed in the internal space between the connection pipe 11 and the spout 12, and the valve body of the open / close valve 13 is the interior of the main body 10 </ b> A. It is adapted to abut against a flange (valve seat) 10a.

  In this case, the on-off valve 13 is moved to the rear side (right side in FIG. 3) to be in contact with the flange 10a and closed (the packing 89 is disposed between the flange 10a and the valve body of the on-off valve 13). And is moved to the front side (left side in FIG. 3) to be in an open state. The forward / backward movement of the on-off valve 13 for opening / closing the on-off valve 13 is guided by inserting the piston 18 integral with the spindle 39 supporting the on-off valve 13 into the cylinder 19. Yes. An O-ring 90 is inserted between the outer surface of the piston 18 and the inner surface of the cylinder 19 (sliding surface). A cap 10B that closes the internal space of the main body 10A is attached to the front end of the main body 10A.

  The on-off valve 13 described above is driven in the front-rear direction between the closed position and the released position by the drive body 15 connected via the link mechanism 20. In this case, as described above, the driving body 15 is held in a state where the shaft 40 is connected to the on-off valve 13 via the link mechanism 20 and is attached to the tip of the shaft 40 and floats on the water in the water storage tank 1. The float 42 is provided.

Here, the configuration of the link mechanism 20 will be described.
The link mechanism 20 includes a plurality of first to fourth arm members 21, 24, 26, 28 that are rotatably supported with respect to each other, and the fourth arm member 28 is on the shaft 40 side (the driving body 15). The second arm member 24 is connected to the on-off valve 13 side (specifically, the spindle 39 extending from the piston 18 that supports the on-off valve 13).

  The first arm member 21 is rotatably supported by a bracket composed of a pair of opposing support plates 29 and 29 fixed to the upper end surface of the main body 10A. Specifically, the rear end of the first arm member 21 is positioned between a pair of support plates 29 and 29 of the bracket, and is rotatably supported by the screw 22. Further, one end of the second arm member 24 (the upper end in FIGS. 3 and 4B) is rotatably supported by the front end of the first arm member 21. Specifically, the second arm member 24 is positioned between a pair of support portions 21 a and 21 a that are divided into two forks at the front end of the first arm member 21 and is rotatably supported by a screw 23.

  Further, the intermediate portion of the second arm member 24 is rotatably supported by the front end of the spindle 39 that extends outward through the cap 10B. Specifically, the second arm member 24 is formed by a pair of support plates 24 a and 24 a that are joined to each other, and these support plates 24 a and 24 a are separated from each other and are intermediate between the second arm members 24. When the front end of the spindle 39 is inserted into the opening formed in the part, the second arm member 24 is rotatably supported by the screw 25 with respect to the inserted spindle 39.

  The other end of the second arm member 24 (the lower end in FIGS. 3 and 4B) is rotatably supported by the front end of the third arm member 26. Specifically, the third arm member 26 includes a pair of opposing support plates 26a and 26a, and the second arm member 24 is screwed in a state where the other end of the second arm member 24 is sandwiched between the support plates 26a and 26a. 27 is rotatably supported by the third arm member 26. The rear end of the third arm member 26 is rotatably supported by a screw 31 on the rear end of the fourth arm member 28 positioned so as to be sandwiched between the support plates 26a and 26a. Further, an intermediate portion of the fourth arm member 28 is rotatably supported by a screw 30 with respect to a U-shaped bracket 29 extending from the water outlet 12. That is, the on-off valve 13 (valve body 13a) is connected to the link mechanism 20 configured as described above, and the drive body 15 including the shaft 40 and the float 42 is connected to the link mechanism 20 in the front-rear direction. It is designed to be driven.

  Further, as described above, the float 42 is mounted on the distal end side of the shaft 40, and the proximal end side of the shaft is detachably screwed into the arm member 43 that engages with the fourth arm member 28. It is integrated with the member 43. The arm member 43 is pivotally supported with respect to the front end of the fourth arm member 28 that constitutes the link mechanism 20, and is fixed by a connecting portion 50. In this case, the connecting portion 50 is in an engaged state in which the arm member 43 on the drive body 15 side and the fourth arm member 28 on the link mechanism 20 side are locked and fixed (a state in which both cannot rotate relative to each other). It should be. In other words, even if a large force acts on the shaft 40 in the rotation direction, the arm member 43 and the fourth arm member 28 may be in a relationship that does not move relative to each other.

  The engagement relationship for fixing the rotation in the connecting portion 50 of the present embodiment is as follows: the inclination angle of the shaft 40 with respect to the horizontal plane when the on-off valve 13 is in the closed position (initially set angle θ... See FIG. 3B). ) Is easily adjustable. In this adjustment, when the shaft 40 (the arm member 43 in this embodiment) is connected to the fourth arm member 28, the inclination angle θ is set to a desired state so that the shaft 40 can be connected to the fourth arm member 28. It is sufficient if it is configured as follows. That is, the engagement relationship in the connecting portion 50 of the present embodiment is such that when the shaft 40 (arm member 43) is connected to the fourth arm member 28, the inclination angle θ can be easily set to a desired state. It has a combined structure.

  This fitting structure is formed in a portion where the base end of the arm member 43 (shaft 40) and the front end of the fourth arm member 28 of the link mechanism 20 are in contact with each other, and is formed on each of the facing surfaces 43a and 28a. It is comprised by the uneven | corrugated | grooved part 43b, 28b. That is, when the concave and convex portions are fitted to each other, the two are connected so as not to rotate relative to each other, and the inclination angle θ can be set to a desired state by changing the initial setting position in the direction around the axis. Become.

  In this case, the uneven portions 43b and 28b may be formed in plural on the respective opposing surfaces at positions where the inclination angle can be changed. However, as shown in FIG. 4, the arm member 43 with respect to the fourth arm member 28 is provided. It is preferable to continuously form 360 degrees around the support shaft. That is, by forming the concavo-convex portion over 360 °, the initial set angle with respect to the horizontal plane of the shaft 40 (inclination angle θ in FIG. 3B) can be adjusted more finely and easily.

  Specifically, both the concavo-convex portions 43b and 28b are continuously formed over 360 ° around the circular openings 43c and 28c through which the bolts 52 as the support shafts are inserted, and the initial set angle θ of the shaft 40 is set. The two are fitted at an optimum position while adjusting, and the bolt 52 is inserted in that state, and the nut 54 is screwed in from the opposite side, so that both are fixed and prevented from rotating.

  By the way, even if the engagement state as described above, and further, a fitting structure is provided, the float 42 floats on the water surface, so the shaft 40 is likely to vibrate due to the influence of the water surface fluctuation at the time of water supply, There may be a case where loosening occurs in the detent fixing of the connecting portion 50 at the base end portion of the shaft 40. Therefore, in order to further ensure the engagement state in which the above-described rotation prevention is fixed, the connecting portion 50 is configured to reliably prevent the shaft 40 and the link mechanism 20 from rotating against each other by a magnetic force.

  Specifically, the connecting portion 50 includes a pair of opposing magnets 60 and 62 embedded in the arm member 43 of the shaft 40 and the fourth arm member 28 constituting the link mechanism 20. These magnets 60 and 62 are space portions formed in the arm members 28 and 43 in the vicinity of the concavo-convex portions 28b and 43b as shown by broken lines in FIG. The surface is embedded in 28d and 43d without being exposed (the surfaces of the magnets 60 and 62 may be exposed at the opposing surfaces 28a and 43a of the arm members 28 and 43). The magnets 60 and 62 have an annular shape so as to surround the circular openings 28c and 43c from the outside. The material and magnetic force of the magnets 60 and 62 may be arbitrarily set as long as the shaft 40 and the link mechanism 20 can be securely locked against each other.

Next, the operation and effect of the constant water level valve device 10 configured as described above will be described with reference to FIGS.
As shown in FIG. 2, the water level in the water reservoir 1 rises, and the position where the float 42 rises and closes the on-off valve 13 (inclination angle θ in FIG. 3B) becomes the water supply stop surface P <b> 1. Further, when the water level in the water storage tank 1 is lowered due to the use of water, the float 42 is lowered at the same time, and when the water level is lowered to the water supply start surface P2 in FIG. 2, the shaft 40 rotated counterclockwise and the link mechanism 20 The on-off valve 13 is released via Thereby, the pressure in the pilot pipe 7 is lowered, the water supply valve 3 (see FIG. 1) is released, and water is supplied into the water storage tank 1 through the inflow pipe 3a. Then, the float 42 rises with the supply of water, and when the float 42 reaches the water supply stop surface P1, the on-off valve 13 is closed, the pressure in the pilot pipe 7 is increased, the water supply valve 3 is closed, and the water supply is stopped. To do.

  In such a constant water level valve device 10, as described above, the shaft 40 on which the float 42 is mounted and the link mechanism 20 connected to the on-off valve 13 are fixed by the connecting portion 50 by the action of magnetic force. Therefore, even if the float 42 vibrates or repeatedly moves up and down due to the rise / fall of the water level and the fluctuation of the water surface during water supply, the connecting portion 50 does not loosen, and the shaft 40 can rotate stably. Can move. Therefore, the operation of the on-off valve 13 can be performed stably, and the position of the water supply stop surface P1 of the float 42, which is the initial set position, does not change.

  Moreover, in this embodiment, the fitting structure of the connection part 50 also has an advantageous effect. That is, as described above, when the outlet space S is widened, the overflow surface P is lowered, so that the water supply stop surface P1 and the overflow surface P (in the horizontal drawing method, the overflow surface becomes a position P ′). Although the position where the full water warning position P3 is set becomes severe, the full water warning position P3 can be easily set by lowering the position of the water supply stop surface P1 by the constant water level valve device 10. It becomes like this. That is, the uneven portion 43b of the arm member 43 is changed to the uneven portion 28b of the fourth arm member 28 so that the inclination angle (initial setting angle) θ of the shaft 40 (arm member 43) with respect to the fourth arm member 28 is increased. By positioning and fixing both, it is possible to lower the position of the water supply stop surface P1.

  As described above, by increasing the inclination angle (initial setting angle) θ, in FIG. 2, the position of the water supply stop surface P <b> 1 is increased to, for example, the position of the water supply start surface P <b> 2 without increasing the length of the shaft 40. Can be lowered easily. In this case, as described above, the rotatable range (rotatable angle) of the shaft 40 depends on the stroke of the on-off valve 13 and is specified to be a constant value. It is possible to lower the water supply stop surface P1 until the position is less than 90 ° with respect to the horizontal plane (when the shaft 40 reaches 90 ° with respect to the horizontal plane, the float 42 cannot rise).

  As described above, according to the present embodiment, the shaft 40 and the link mechanism 20 are securely fixed to each other by the connecting portion 50 having magnetic force by the action of magnetic force, so that the connecting portion 50 does not loosen. The shaft 40 can be stably rotated over a long period of time, and the position of the water supply stop surface P1 can be finely changed and adjusted without increasing the length of the shaft 40 by the fitting structure described above. Therefore, the setting of the full water alarm position P3 of the alarm device is facilitated, and handling, installation work, maintenance work, etc. of the constant water level valve device 10 can be easily performed.

  Although the embodiments of the present invention have been described above, the present invention can be modified as appropriate in addition to the above-described embodiments. For example, in the present embodiment, the shaft 40 can be attached to and detached from the arm member 43, but the shaft 40 and the arm member 43 may be integrated. Further, the configuration of the link mechanism 20 can be modified as appropriate. For example, the on-off valve 13 of the present embodiment is configured to move in the front-rear direction (horizontal direction) in the main body 10A, but may be configured to move in the up-down direction (vertical direction). Thus, the configuration of the link mechanism 20 can be modified as appropriate.

DESCRIPTION OF SYMBOLS 1 Water tank 3 Water supply valve 10 Constant water level valve apparatus 12 Water discharge port 13 On-off valve 15 Driver 20 Link mechanism 40 Shaft 42 Float 50 Connection part 60,62 Magnet 80 Alarm device P Overflow surface P1 Water supply stop surface P2 Water supply start surface P3 Full water warning position

Claims (5)

It is connected to a water supply valve through a pilot pipe in a state where it is installed in the water storage tank, and water supplied through the pilot pipe from the water supply valve is discharged / stopped into the water storage tank to stop the internal pressure of the pilot pipe. In a constant water level valve device that opens / closes the water supply valve by switching
The constant water level valve device includes a main body comprising a water outlet for discharging water sent through a pilot pipe into a water storage tank, and an on-off valve for opening and closing the water outlet, and the main water level valve device is provided on the main body. A driving body for driving,
The drive body includes a shaft on which a float is mounted, a link mechanism that is connected to the on-off valve and is displaced between a closed position and a release position of the on-off valve, and the shaft and the link mechanism are magnetically coupled to each other. And a fixed water level valve device characterized by having a connecting portion for locking and preventing rotation.   2. The constant water level valve device according to claim 1, wherein the connecting portion has a pair of opposing magnets embedded in each of the shaft and the arm member constituting the link mechanism.   3. The constant water level according to claim 1, wherein the connecting portion has a fitting structure that allows adjustment of an inclination angle of the shaft with respect to a horizontal plane when the on-off valve is in a closed position. Valve device.   The constant water level valve device according to claim 3, wherein the fitting structure has an uneven portion formed at a portion where the shaft and the link mechanism are in contact with each other.   5. The constant water level valve device according to claim 4, wherein the uneven portion is continuously formed over 360 ° around a support shaft that supports the shaft with respect to the link mechanism.

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