JP4815155B2 - Control valve - Google Patents

Description

  The present invention relates to a control valve, particularly to a control valve used for water distribution and drainage of water and sewage, industrial water, agricultural water, hydroelectric power, and the like, and relates to a control valve capable of performing stable and accurate control.

  Conventionally, the control valve of the kind described above has a configuration as shown in FIG. 2, for example. This conventional example will be briefly described with reference to FIG. 2. In the figure, reference numeral 1 denotes a body (casing). A flow path 2 is formed in the body 1 for flowing water in the direction indicated by the arrow. A partition plate 3 is provided above the flow path 2, and a cylinder 4 is provided in the upper chamber.

  A piston 5 is slidably fitted into the cylinder 4 described above, and a port member 6 having flow holes 6a, 6a,. A coil spring 8 is elastically provided between the piston 5 and the upper cover 7 of the body 1. A rod having a lower end fixed to the upper surface of the piston 5 at the center of the coil spring 8 in the axial direction. 9 is provided.

  The upper end portion of the rod 9 passes through the upper cover 7 and is inserted into a guide 10 provided there, and a cap 11 is mounted around the guide 10.

  In the figure, reference numeral 12 denotes a needle valve for injecting pressure water into the cylinder 4. 13 is a pressure setting mechanism, 14 is a pressure gauge, and 15 is a fully open valve that is normally closed.

  However, in this conventional control valve configuration, the opening area of the needle valve 12 that is passed when injecting the pressure water can be adjusted due to its mechanism, but the opening area can be automatically changed after the adjustment. Therefore, the control becomes unstable when garbage or scale is clogged.

  In addition, the diameter of the flow path in such a control valve is planned and set so as to be able to cope with a large amount of water used in anticipation of demand for future population growth in recent years. Therefore, at the beginning of installation, the amount of water used was extremely small, and there was an unreasonable fact that it did not match the size of the control valve.

  Further, in such a control valve, since the contact surface of the valve body (piston and port member in the conventional example) with water is flat, it may receive a shock of water and generate noise and vibration. May also occur.

  Moreover, the opening degree adjustment of the valve body in such a control valve must be performed with the cover removed, resulting in poor work efficiency.

In some cases, air may accumulate at the inlet and outlet of the control valve, and the control may become unstable due to the influence of the air.
Regarding the invention of the present application, the applicant conducted a search of prior technical documents, but could not find any documents that seem to be particularly relevant.

  The problem to be solved by the present invention is that the opening area of a needle valve that allows pressure water to pass through cannot be automatically changed during use. The size is incompatible with the actual amount of water used, and the impact of running water on the surface of the valve body causes noise, vibration, and cavitation. The point is that the work is cumbersome and inefficient, and air accumulates at the inlet and outlet and the control becomes unstable.

  In order to solve the above-described problems, the control valve according to the present invention has an inlet for pressurized water formed in the upper cover of the casing, and has a rod inserted through the inlet and penetrating in the vertical direction. A valve body is fixed to the lower end, and a portion corresponding to the inlet of the rod is formed in a taper shape that is narrowed downward. A screw is formed at the lower end of the rod, and the screw is connected to the valve. A rubber pad that is screwed to the upper surface of the body and abuts the upper surface of the valve body at the lower end of the rod and has an insertion hole smaller in diameter than the rod diameter and a metal pad for restraining on the surface of the rubber pad are superposed. The rod head is provided with a height position adjusting means for the rod, and the height position adjusting means is a groove for receiving a minus driver. age There.

  Further, the control valve according to the present application is characterized by including a cylindrical body made of a plastic material that is transparent or translucent around the upper end portion of the rod, and the cylindrical body is made of acrylic, An annular constriction is formed in the circumferential direction with an appropriate pitch on the outer periphery, and the cylindrical body is provided with at least one water-stopping means such as an O-ring. The above-described pressure water inlet is provided with a housing through which a rod is inserted, and an upper portion of the housing is provided with a cap that encloses the cylindrical body. A pressure water supply pipe is connected to a part, and an open valve for draining the pressure water and fully opening is connected.

  Furthermore, the control valve according to the present application includes a valve body for opening and closing the flow path formed in the casing, and a liner having an appropriate opening area around the valve body in a replaceable manner. Or a valve body having the function of the liner.

  In addition, the control valve according to the present application includes a valve body that opens and closes a flow path formed in the casing, and a tongue having an appropriate shape such as a spherical arc surface on the front end surface of the valve body. The tongue described above is characterized in that it is fixed from the back side of the valve body using a fastening element such as a bolt.

  Furthermore, the control valve according to the present application is characterized in that an adjustment bolt for restricting the movable distance of the valve body is inserted into a part of the upper cover of the casing, and the adjustment bolt described above is fixed to the upper cover. It is characterized by being inserted through a nut member.

  And the control valve which concerns on this application is equipped with the valve for air venting in the inflow port and outflow port part of the flow path currently formed in the casing, It is characterized by the above-mentioned.

  The control valve according to the present invention is configured as described above. According to the first aspect of the present invention, a part of the rod integrated with the valve body can also serve as a needle function that allows a part of the rod to pass through when injecting the pressure water. Therefore, the opening area can be changed automatically, the supply amount of the pressure water can be changed, and the control can be stably performed.

  In addition, since the conventional needle is fixed, dust and scales are clogged in the nozzle part, which causes the valve body to malfunction. In addition to having an effect, clogging such as dust and scale is less likely to occur. In the unlikely event that clogging occurs, opening the attached release valve makes it unnecessary to disassemble the needle portion, and it is possible to clean it with the force of water flow.

According to the present invention the rotation of the rod becomes to be regulated, also, it becomes possible to perform height adjustment of the rod freely.

According to the present invention , since the highest position of the rod can be visually confirmed, it has an opening degree display function that can also grasp the opening degree of the valve body integrated with the rod. In addition, it is possible to prevent the pressure water from entering the transparent cylindrical body.

According to the present invention , unnecessary pressure water can be released, and the valve body can be fully opened.

According to the present invention, it is possible to adapt to a small amount of water at the time of installation of the control valve, and it is possible to replace the liner as appropriate according to the amount of water used. Will be able to.

According to the present invention , the flow of water in the flow path can be adjusted. Specifically, the turbulent flow of water at the tip of the valve body is rectified and dispersed in the outer peripheral direction of the valve body, and passes through the circulation hole of the liner described above. The amount of water can be made uniform. As a result, noise, vibration, and cavitation can be suppressed and stable control can be performed. In addition, the tongue is fixed from the back side of the valve body with a fastening element such as a bolt, so the head of the bolt or the like does not adversely affect the water flow and is shaped according to the installation work and usage conditions at the site. It is also possible to exchange for different tongues.

According to the present invention , the movable distance of the valve body, that is, the opening degree can be executed by an external work without opening the upper cover. In addition, the ability to adjust the opening makes it possible to control two applications, for example, those used as pressure reducing valves to control pressure reduction and constant flow, and those used as water level adjusting valves to control water level and constant flow. Is possible. Furthermore, even when two pressure reducing valves are operated in parallel, the frequency of use of the pressure reducing valve can be changed by reducing the opening of one of the pressure reducing valves, and the product life of the pressure reducing valve can be extended. By devising the attachment method (structure) with the upper cover, it is possible to supply high-quality water without generating rust.

According to the present invention , the air accumulated at the inlet and outlet or the air at all times can be removed, and stable control can be performed. Further, the characteristics of the control valve itself can be changed by using a small piping valve and an air vent valve.

  This was realized by configuring as in the embodiment shown in the figure.

  Next, an example of a preferred embodiment of the present invention will be described with reference to FIG. FIG. 1 is a sectional view showing a control valve embodying the present invention.

  In FIG. 1, reference numeral 20 denotes a casing (body). A water flow path 21 is formed below the casing 20, with an inflow port 21 a on the left side and an outflow port 21 b on the right side in the drawing. In the middle of the flow path 21, that is, at the boundary between the inlet 21a and the outlet 21b, a valve body 22 having an upward U-shaped cross section and an annular flange 22a integrally formed on the periphery of the upper surface is disposed. . Reference numeral 23 denotes a seat, 22b denotes a valve seat, and 24 denotes a cylinder in which the outer peripheral surface of the annular flange 22a of the valve body 22 is in sliding contact.

  In the figure, reference numeral 25 denotes an upper cover of the casing 20, and an inlet 26 for injecting pressure water into the cylinder 24 and to the upper part of the valve body 22 is provided at a substantially central portion of the upper cover 25. The injection port 26 has a structure in which a lower portion is expanded in a trumpet shape.

  A rod 27 is passed through the inlet 26 described above, and a screw is formed at the lower end of the rod 27 and is screwed into the approximate center of the upper surface of the valve body 22 for integration. A disc-shaped rubber pad 28 having a rod insertion hole having a diameter smaller than the diameter of the rod 27 is disposed in the lower layer at the threaded portion between the rod 27 and the valve body 22, and the rubber pad 28 is disposed on the upper surface of the rubber pad 28. A metal pad 29 having the same size as 28 is superposed, and the rotation of the rod 27 is suppressed by the braking force of the rubber pad 28.

  The portion of the rod 27 corresponding to the inlet 26 is tapered to form a needle portion 27a. Since the needle portion 27 a is formed on the rod 27, the needle portion 27 a is also variable so as to move in synchronization with the vertical movement of the rod 27 or the valve body 22.

  The rod 27 has a large diameter at a portion protruding above the upper cover 25 and is inserted into the housing 30 and guided. The side of the housing 30 is connected to the tip of a water supply pipe 31 for supplying pressure water, and the other side of the housing 30 is used for draining unnecessary pressure water and for opening the valve body 22 fully. A valve 32 is connected.

  Further, the upper end portion of the rod 27 is provided with a cylindrical portion 33 made of transparent acrylic at a portion further protruding from the housing 30, and a plurality of constricted portions are circularly arranged on the cylindrical body 33 with an appropriate pitch. It is formed along the circumferential direction. With such a configuration, the height position of the rod 27, that is, the opening degree of the valve body 22 can be visually confirmed visually. Reference numeral 34 denotes a cap which covers the cylindrical body 33 and is detachably provided above the housing 30.

  Further, a liner 35 is provided on the outer periphery of the valve body 22 so as to be detachable and replaceable. The liner 35 has a cylindrical shape whose inner diameter is substantially the same as the outer diameter of the valve body 22, and has a configuration in which an upper edge flange 35 a is engaged with a flange in the casing 20. On the peripheral wall surface of the liner 35, a water circulation hole 35b is formed with an area as required, and can be appropriately exchanged on site according to the amount of water used.

  Further, a tongue 36 whose surface is a spherical arc surface in the drawing is integrally provided on the lower surface of the distal end of the valve body 22 described above. This tongue 36 is fixed from the back surface (upper side) of the valve body 22 with a bolt (not shown), but it can be replaced with a different surface form if necessary. Yes.

  In addition, a vertical through hole is formed at a position close to the periphery of the upper surface cover 25, and a guide pipe 37 that is integrally provided with a locking flange 37a at the lower end is fitted into the through hole in an airtight manner. Yes. A nut member 38 is attached to a portion of the guide pipe 37 that protrudes to the outside from the upper cover 25, and an adjustment bolt 39 that regulates and adjusts the movable distance of the valve body 22 is inserted through the nut member 38. The tip of the adjustment bolt 39 is brought into contact with the flange 22a of the valve body 22 to regulate the rise of the valve body 22, that is, the opening degree. By rotating the adjustment bolt 39 and changing its tip position, the regulation is adjusted as described above.

  The inlet 21a and the outlet 21b are formed with vent holes 40, 40 for extracting accumulated air, and valves 41, 41, etc. for extracting the air are connected to the vent holes 40, 40. Has been. If a known air valve is used as the valve 41 for extracting the air, the air can be always released without waiting for the air to accumulate. It is also possible to change the characteristics of.

  A groove for adjusting the height position is formed on the top surface of the rod 27 described above, and a screwdriver is rotated along with the groove to rotate the tip of the rod 27. The total amount can be changed and the height can be adjusted. This can be similarly achieved by forming a cross groove on the top surface of the rod 27 and using a Phillips screwdriver.

  Further, the cylindrical body 33 is provided with a water stop mechanism using O-rings, packings, or the like at a plurality of locations, and prevents pressure water from entering the cylindrical body 33. Yes.

  The control valve according to the present invention is configured as described above. In addition to this configuration, the rod position, especially the top surface position, is used to perform mechanical input operations for switching ON and OFF, or to block light in combination with an optical sensor using a light emitting element and a light receiving element. It is also possible to provide functions such as switching on and off by the optical system sensor.

It is sectional drawing which shows the control valve which implemented this invention. It is the partially broken perspective view which shows the control valve as a prior art example.

Explanation of symbols

20 Casing 21 Flow path 21a Inlet 21b Outlet 22 Valve element 22a Annular flange 22b Valve seat 23 Receiving seat 24 Cylinder 25 Upper cover 26 Inlet 27 Rod 27a Needle part 28 Rubber pad 29 Metal pad 30 Housing 31 Water supply pipe 32 Release valve 33 Cylindrical body 34 Cap 35 Liner 35a Flange 35b Flow hole 36 Ton 37 Guide pipe 37a Locking flange 38 Nut member 39 Adjustment bolt 40 Vent hole 41 Valve for air vent

Claims (1)

An inlet for pressurized water is formed in the upper cover of the casing, a rod is inserted through the inlet and penetrates in the vertical direction, a valve body is fixed to the lower end of the rod, and the rod is connected to the inlet. The corresponding portion is formed in a tapered shape that is narrowed downward, and the head portion of the rod is provided with a height position adjusting means for the rod as a groove for receiving a minus driver, and the upper end portion of the rod A transparent or semi-transparent material is made of acrylic around the outer periphery, is formed with an annular constriction in the circumferential direction with an appropriate pitch on its outer periphery, and is provided with at least one O-ring water-stop means. And a housing through which the rod is inserted is provided above the pressure water inlet, and a cap for covering the cylindrical body is provided at the top of the housing. A pressure water supply pipe is connected to a part of the housing, and a screw is formed at the lower end of the rod. The screw is screwed onto the upper surface of the valve body, and a valve body is attached to the lower end of the rod. In the control valve which is in contact with the upper surface and has a rubber pad formed with an insertion hole whose diameter is smaller than the rod diameter and a metal pad for restraining on the surface of the rubber pad, the pressure water is drained and fully opened. And an adjusting bolt is inserted into a part of the upper cover of the casing through a nut member fixed to the upper cover for restricting the movable distance of the valve body. And control valve.

Images