JP2016065572A - Multifunctional discharge pipe or multifunctional valve and pump facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve having functions of a check valve and a stopper valve, improving operability or maintainability of a multifunctional valve also having a water-hammer preventing function, eliminating disadvantage caused by a crossing at a right angle between flow-in flow passage and flow-out flow passage and showing less occurrence of cavitation or less loss coefficient.SOLUTION: This invention relates to a multifunctional discharging pipe or a multifunctional valve comprising a flow-in passage having a flow-in port 1 at an upstream side; a flow-out passage having a flow-out port 2 at a downstream side communicating with the flow-in passage; an evacuation passage 3 branched at a middle branching point between the flow-in port 1 and the flow-out port 2; a valve body 5 having a check valve function arranged to move between a valve seat 4 arranged at the branch point and the evacuation passage 3; a valve body 5 having a function of stopper valve for closing between the flow-in port 1 and the flow-out port 2 at the branch point; and a center line of the flow-out passage and a center line of the evacuation passage 3 form an acute angle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pump facility equipped with a multi-function discharge pipe or a multi-function valve used in various plants.

A pumping facility is essential for fluid pumping. FIG. 3 is a schematic view showing an external appearance of a general pump facility installed in a manhole or the like. In FIG. 3, 20 is a manhole, 21 is a header pipe, 22 is an inflow pipe, 23a and 23b are rising pipes, 24a and 24b are air vent valves, 25a and 25b are check valves, 26a and 26b are water stop valves, 27a, 27b is a pump, 28a and 28b are water inlets, and 29 is a pressure feed pipe.

  As shown in FIG. 3, in a pump facility installed in a manhole or the like, two pumps 27a and 27b are generally arranged, and either one or both pumps are operated according to the processing amount. The sucked water is pumped through the header pipe 21. For this reason, each pump needs a rising pipe, a check valve, a water stop valve, and a valve body with a water hammer prevention function, which leads to an increase in manufacturing cost and installation work cost.

  FIG. 4 is a view showing an example of a conventional general pump facility, in which 31 is a pump, 32 is a check valve, 33 is a water stop valve, and FIG. 5 is provided in the pump device of FIG. It is a figure which shows an example of the check valve which is shown in this figure, and the check valve shown here is attached to the pump device via a flange and is shown in the figure with a pivot shaft provided in the upper part in the figure as the center. It operates in the direction of the arrow shown, and when water flows backward from the right side in the figure, the flow path is closed.

  6 and 7 are diagrams showing examples of water stop valves provided in the pump facility of FIG. FIG. 6 shows an example of a valve called a gate valve. This valve has a structure in which a plate-like valve body descends from the upper direction in the drawing to close the flow path. This feature is low in fluid resistance when fully opened, but has a large opening / closing stroke and is not suitable for rapid opening / closing. Further, as shown in FIG. 6B, the flow path shape when the valve body is stopped halfway becomes a crescent shape, and there is a problem that turbulent flow and vortex flow are large and impurities are easily caught.

  FIG. 7 is a diagram illustrating an example of a valve called a butterfly valve. In this valve, as shown in FIG. 7 (b), the valve rotates in the direction of the arrow shown in the drawing around a rotation shaft provided at the center of the flow path. For this reason, it has a high closing capability and is suitable for automation because of its small opening / closing torque. In the butterfly valve, in the intermediate state between the closed state and the released state, as shown in FIG. 7C, the shape of the flow path becomes two crescents, and a lot of cavitation and noise are generated, and impurities are easily caught. There is the same problem as the gate valve.

FIG. 8 is a view showing an example of a valve called a globe valve. In this valve, the fluid flow is S-shaped. It has good closing ability and is used as a flow adjustment, but it tends to generate cavitation and has a high loss factor.

  FIG. 9 is a diagram showing an example of a multi-function valve by the present inventor. In this multi-function valve, one valve body has the functions of a check valve and a water stop valve. In the intermediate state between the closed state and the released state, as shown in FIG. Thus, there is a feature that there is little generation of foreign matter, cavitation and noise.

  In addition, the water hammer means that when the flow of the fluid being conveyed in the pipe at a constant pressure is suddenly stopped by an operation such as stopping the pump, a sudden pressure rise or impact is caused in the pipe due to the inertia of the fluid. In order to cope with this phenomenon, a pump with a flyhole, an air vessel, and the like are required, and a great cost is imposed.

  As a countermeasure against this, the present inventor, in Patent Document 1, Patent Document 2, and Patent Document 3, provides a check valve, a water stop valve, and a water hammer prevention function which are integrated into a discharge pipe. It is disclosed that the number of parts can be reduced by reducing the manufacturing cost and the installation cost. However, in the pump equipment disclosed here, the number of parts is reduced and the size is reduced, the frequency of occurrence of trouble is reduced, and there is no tool and the response to troubles such as blockage is insufficient in a short time. The actual situation is that it has not been able to cope with drainage of the downstream pumping pipe necessary for trouble-solving work.

Patent No. 4960520 Japanese Patent No. 5150859 Patent No. 5298281

  Accordingly, an object of the present invention is to improve the operability and maintainability of the multi-function valve provided with the functions of the check valve and the water stop valve and also provided with the water hammer prevention function. The purpose is to eliminate the problems caused by the orthogonal flow paths. Another object is to further improve cavitation generation and loss factor.

  In view of the above problems, the present invention has been made as a result of reexamination of the configuration of the valve body forced release device and the flow path of the multi-function valve, particularly the moving direction of the valve body.

  That is, the present invention is branched at an inflow path having an inlet on the upstream side, an outflow path having an outlet on the downstream side communicating with the inflow path, and a branch point between the inlet and the outlet. A retraction path, a check valve arranged to move between the retraction path and a valve seat provided at the branch point, and a block between the inlet and the outlet at the branch point A multi-function discharge pipe or a multi-function valve having a valve body having a function of a water stop valve, wherein a direction formed by a center line of the outflow passage and a center line of the retraction passage is oblique. The function of the valve body is manifested when the valve body is biased toward the valve seat by the backflow water and the weight of the valve body from the outlet, and the function of the valve body as the water stop valve is the retraction Threaded to a female screw provided on a closing member that closes the side of the road facing the branch point It is formed by a multifunctional discharge pipe or multifunction valve characterized by expression by rotation water cutoff handle having a male thread.

  Further, the present invention is characterized in that a water hammer preventing function is provided, having a repulsion device by a compression spring or a magnet arranged between the closing member and the valve body or a combination of both, The multi-function discharge pipe or multi-function valve according to claim 1.

  Further, in the present invention, the valve body is fastened to a cable joined to a drainage handle having a second male screw, which is screwed to a second female screw provided in the closing member, and the water The valve body forced movement function and the valve body inoperable release are made possible by draining the inside of the multi-function discharge pipe or multi-function valve by being moved to the retreat path via the cable by the rotation of the drain handle. The multi-function discharge pipe or multi-function valve according to claim 1 or 2, characterized by having a function.

  The present invention also provides a pump facility including the multifunction discharge pipe or the multifunction valve.

  In the multi-function discharge pipe or multi-function valve according to the present invention, since the inflow path and the outflow path are arranged substantially in a straight line, problems such as pressure loss due to the bending of the flow path can be solved. Further, in the multi-function discharge pipe or multi-function valve according to the present invention, the valve body having the functions of the check valve and the water stop valve has a branch point provided between the inlet and the outlet, and a branch point. Since it is provided in a state branched from the point and is arranged so as to move between a retreat path whose angle with the outflow path is 30 to 60 °, the above-described function can be expressed depending on the situation.

  Further, in the multi-function discharge pipe or multi-function valve according to the present invention, magnets are disposed on the side of the closing member that closes the retreat path that faces the valve body, and on the side that faces the closing member of the valve body, A water hammer preventing function can be provided by forming a magnetic field in which each magnet repels each other or by providing a compression coil spring between the closing member and the valve body. The pair of magnets and the compression coil spring can be used alone or in combination.

Sectional drawing which shows an example of the multifunction discharge pipe or multifunction valve which concerns on this invention. The figure which shows the example of the member for water hammer prevention, FIG. 2 (a) is a magnet, FIG.2 (b) is a compression coil spring. Schematic showing the appearance of a typical pumping facility installed in manholes, etc. The figure which shows an example of the conventional common pump apparatus. The figure which shows an example of a non-return valve. Diagram showing an example of a valve called a gate valve The figure which shows an example of the valve | bulb called a butterfly valve. The figure which shows an example of the valve | bulb called a globe valve. The figure which shows an example of this multifunctional valve.

  Next, embodiments of the present invention will be described with reference to specific drawings.

  FIG. 1 is a cross-sectional view showing an example of a multi-function discharge pipe or multi-function valve according to the invention. In FIG. 1, in FIG. 1, 1 is an inflow port, 2 is an outflow port, 3 is a retraction path, 4 is a valve seat, 5 is a valve body, 6 is a valve body moving cable, 7 is a water stop handle, and 8 is a water drain. Handle, 9a is a first flange provided with an inlet, 9b is a second flange provided at an outlet, 9c is a third flange provided at an end of the escape path, and 10 is a closure of the escape path The members 11a and 11b are magnets for preventing a water hammer.

  In a state where water is pumped from the pump (not shown) to the inflow port, the valve body 5 opens the flow path away from the valve seat 4 disposed at the branch point by the flow of water, and the water flow In the state of stopping or reversely flowing, the valve body 5 is pressed against the valve seat 4 by flowing due to the weight of the valve body 5 or backwardly flowing water, and the flow path is blocked at the branch point. Therefore, it functions as a check valve.

  When the flow path is to be closed or the flow rate is to be adjusted, the water stop handle is rotated so that the male screw provided on the rod-shaped member constituting the handle is screwed with the male screw. The valve body 5 can be pressed against or squeezed to the valve seat 4 by the action of a female screw provided on the member 10.

  In addition, when it is necessary to discharge water inside the multifunction discharge pipe or multifunction valve for trouble occurrence or maintenance, the drain handle 8 is rotated to provide the rod-like member constituting the handle. The valve body 5 is moved to the side of the closing member 10 via the valve body moving cable 6 by the action of the male screw and the female screw provided on the closing member 10 so as to be screwed to the male screw, that is, the left in the figure. It can be lifted diagonally upward.

  By operating the drain handle 8, it becomes possible to discharge water remaining on the downstream side of the branch point, that is, in the outflow path or the retreat path 3 in the upward direction in the figure. The main factors for setting the desired angle formed by the center line of the outflow path and the retreat path 3 to be in the range of 30 to 60 ° are the handling of each member constituting the multifunction discharge pipe or the multifunction valve, and the fluid dynamic pressure. It is convenient.

  FIG. 2 is a view showing an example of a water hammer preventing member. FIG. 2 (a) shows a magnet, and FIG. 2 (b) shows a compression coil spring. The magnet shown here is a circular ring having a square or rectangular cross section perpendicular to the circumferential direction, and is magnetized in the thickness direction. There is no particular limitation on the material used, and it is possible to use a ferrite magnet typified by Ba ferrite or a rare earth magnet typified by Nd-Fe-B magnet to prevent the occurrence of surface loss or rust due to friction. In addition, it is desirable to coat the surface with a polymer material or metal.

  As described above, by using these alone or in combination, when the flow of water stops abruptly, the valve body 5 can quickly close the flow path and suppress water hammer. As described above, according to the present invention, it is possible to provide a multi-function valve having functions of a check valve and a water stop valve and also having a water hammer preventing function, and can contribute to downsizing of pump equipment. The present invention is not limited to the above-described embodiment, and does not depart from the gist of the present invention, including various modifications and corrections that can be conceived by those having ordinary knowledge in the field of the present invention. Of course, even if there is a design change in the range, it is included in the present invention.

DESCRIPTION OF SYMBOLS 1 ... Inlet 2 ... Outlet 3 ... Retraction way 4 ... Valve seat 5 ... Valve body 6 ... Valve body moving cable 7 ... Water stop handle 8 ... Water Pull-out handle 9a ... 1st flange 9b ... 2nd flange 3rd flange 10 provided ... Closure member 11a, 11b of retraction path Magnet 20 ... Manhole 21 ... Header pipe 22 ... Inflow pipes 23a, 23b ... Rising pipes 24a, 24b ... Vent valves 25a, 25b ... Check valves 26a, 26b ... Stop valves 27a, 27b ... Pumps 28a, 28b ... Water inlet 29 ... Pressure feed pipe 31 ... Pump 32 ... Member with built-in check valve 33 ... Member with built-in water stop valve

  FIG. 9 is a diagram showing an example of a multi-function valve by the present inventor. In this multi-function valve, one valve body has the functions of a check valve and a water stop valve. In the intermediate state between the closed state and the released state, as shown in FIG. Thus, there is a feature that there is little generation of foreign matter, cavitation and noise.

  Further, the present invention provides at least one of a pair of magnets or a compression spring provided so that respective magnetic poles are repelled on the retreat path side of the closing member and the side of the valve body facing the closing member. It is a header pipe or a discharge pipe provided with a water hammer prevention function.

In a state where water is pumped from the pump (not shown) to the inflow port, the valve body 5 opens the flow path away from the valve seat 4 disposed at the branch point by the flow of water, and the water flow In the state of stopping or reversely flowing, the valve body 5 is pressed against the valve seat 4 by flowing due to the weight of the valve body 5 or backwardly flowing water, and the flow path is blocked at the branch point. Therefore, it functions as a check valve.

Claims (4)

  An inflow path having an inlet on the upstream side, an outflow path having an outlet on the downstream side communicating with the inflow path, a retreat path branched at a branch point between the inlet and the outlet, and Functions of a check valve arranged to move between a valve seat provided at a branch point and the retreat path, and a water stop valve that closes between the inlet and the outlet at the branch point A multi-function discharge pipe or a multi-function valve in which the center line of the outflow path and the center line of the retraction path form an acute angle, the function of the valve body as a check valve is the outlet port The valve body is urged to the valve seat side by the dynamic pressure of the backflow water and the dead weight of the valve body, and the function of the valve body as a water stop valve is the branch point of the retreat path A male screw that is screwed into a female screw provided on a closing member that closes the opposite side Multifunctional discharge pipe or multifunction valve characterized by expression by rotation water cutoff handle having.   2. The water hammer prevention function according to claim 1, further comprising a means for repelling the closing member and the valve body, which is disposed between the closing member and the valve body. Multi-function discharge pipe or multi-function valve.   The valve body is fastened to a cable joined to a drain handle having a second male screw, which is screwed to a second female screw provided on the closing member, and by rotation of the drain handle, It has a valve body forced movement function and a valve body malfunction failure release function that enables drainage inside the multi-function discharge pipe or multi-function valve by being moved to the retreat path via the cable. The multi-function discharge pipe or multi-function valve according to claim 1, wherein the multi-function discharge pipe or the multi-function valve is characterized. A pump facility comprising the multi-function discharge pipe or multi-function valve according to any one of claims 1 to 3.