JPS6220981A - Valve device for pressure fluid - Google Patents

Abstract

PURPOSE:To make the body compact and increase operating number per unit time by interposing a movable valve between an electromagnetic housing and a fluid control housing and disposing an outlet pipe along an extension between both ends of an electromagnet. CONSTITUTION:A movable valve 19 made of a soft iron plate is movably disposed between an electromagnetic housing 8 and a fluid control housing 10. When the movable valve 19 is attracted by an electromagnet 4, the end 6 of a soft iron core 2 and the end 5 of an L-shaped soft iron plate 3 constituting the attractive element of the electromagnet 4 attract a half portion of the width of the movable valve 19 instead of substantially the central portion thereof. The other half portion of the movable valve 19 comes in contact with a stepped portion 15, which functions as a fulcrum P, so that the movable valve 19 can be easily attracted by the electromagnet 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement in a pressure fluid valve device, and in particular to a color sorting system in which different colored particles mixed in granules are classified by color and excluded and sorted using high-pressure air. Concerning the machine's bub device.

Prior art In a conventional color sorting ejector device, the reflected light of particulate matter flowing down from a supply gutter is incident on a light receiving device, and the converted detection signal is sent to a solenoid valve attached to an air nozzle to identify particles of different colors. When the particles pass, the detection signal changes and a solenoid valve is activated, which injects compressed air from an air nozzle, ejecting the unusual particles and causing them to flow down into the discharge gutter.

However, according to the above-mentioned device, the opening and closing of the solenoid valve itself is mechanical, and the time required for opening and closing is long, and because the delay time of operation cannot be ignored, a large number of unique particles pass through in a short period of time. In this case, there was a drawback that the solenoid valve could not respond to all input signals.

In order to eliminate the above drawbacks, a light receiving device and an air nozzle are provided between the supply gutter and the receiving gutter, and a solenoid valve attached to the air nozzle is connected to the light receiving device. Utility Model No. 55-17788 discloses an ejector device for a color sorting machine in which a plurality of stands are arranged in parallel and the solenoid valve is connected to the light receiving device via a signal distribution device.
It has been proposed as Publication No. 8.

In addition, grains containing different color grains flow down from the supply hopper to the downflow gutter via the vibrating grain feed gutter, and the grains linearly flowing out from the flowdown gutter along the flow path are illuminated to determine the difference in the amount of reflected or transmitted light. In a sorting device equipped with a photoelectric sorting chamber that connects a signal from a light-receiving element that detects grains to a control circuit to operate a sorting actuator that scatters and sorts out different-colored grains, an electromagnet installed in the amplitude adjustment section of the vibrating grain feeder is used. A drive circuit and a circuit of an actuating device provided in the sorting actuator are interconnected via a photocoupler provided in the amplitude control electric circuit, and the number of actuations of the sorting actuator is determined relative to an arbitrary reference number of times. An automatic flow rate control device for a color sorter is disclosed in Japanese Patent Application Laid-Open No. 1983-1981, which adjusts the control output to increase or decrease according to the difference rate signal of the increasing or decreasing signals, and changes the amplitude of the vibrating grain feeding trough to adjust the amount of grain flowing out. It is known as Publication No. 53784.

Problems to be Solved by the Invention In the above-mentioned Japanese Utility Model Publication No. 55-177888, a plurality of electromagnetic valves of the ejector device are provided in parallel and connected to the light receiving device via a signal distribution device, so that the light receiving element This system prevents non-response of the solenoid valves and improves the sorting accuracy for the unusually colored particles detected by the system.However, since multiple solenoid valves are required, a large space is required for their installation, and the width of the supply gutter is limited. It was not possible to reduce the width of the machine by shortening the length, and problems such as high configuration costs remained unresolved.

Furthermore, the method disclosed in Japanese Patent Application Laid-open No. 56-53784 deals with changes in the mixing rate of different color particles mixed into the supplied granules,
In order to sort within the safety limits of the injection capacity of the injection electromagnet of the injection nozzle device, a standard number of operations of the injection nozzle device is set, and when the number of operations of the injection nozzle device increases beyond the standard number of times, the supply amount of granules is reduced. When the number of operations decreases below the standard number, the supply amount is gradually increased to maintain the sorting rate and sorting capacity within the capacity limits of the injection nozzle device. The amount of different color particles mixed into the raw material granules is limited, and the sorting time will vary greatly depending on the rate of different color particles mixed into the raw material granules, which will cause problems in shipping plans for refined products. It was necessary to introduce large-scale equipment.

The present invention is an improvement in view of the above-mentioned problems, and it is possible to miniaturize the valve device, significantly increase the number of operations per unit time, miniaturize the color sorting device, and reduce the configuration cost. The technical problem is to provide a valve device.

Means for Solving the Problems In order to achieve the above technical problem, the present invention connects an L-shaped soft iron plate to a soft iron core around which a coil is wound to form an integrated electromagnet, and the electromagnet is made of resin. Both ends of the soft iron core and the molded soft iron plate are partially exposed and buried in a non-magnetic material such as, and a fluid storage chamber is provided around both ends to form an electromagnetic housing, and a pressure fluid can flow in. For fluid control, a pipe and an outflow pipe for pressure fluid are separately provided, the pipe body of the outflow pipe is made to protrude beyond the inflow pipe, and a space is provided between the outflow pipe and the inflow pipe to form a fluid storage part. A housing is formed in substantially the same shape as the electromagnetic housing, and one of the electromagnetic housing and the fluid control housing is provided with a peripheral wall to provide a space in which a movable fluid valve is inserted, and one side end of the movable valve is provided with a peripheral wall. A small hole for gas circulation is formed in the part, the movable valve is interposed between the electromagnetic housing and the fluid control housing, and the two housings are fastened to form a valve device, and the outflow pipe The movable range of the movable valve is restricted by both ends of the electromagnet and a gap, the gas inflow pipe and the small hole of the movable valve are communicated, and the outflow pipe is placed on an extension line between both ends of the electromagnet. It has an arranged configuration.

Effect With the above configuration, when the electromagnetic housing and the fluid control housing are integrally connected and the outer end of the inflow pipe is connected to a pressure fluid source such as a compressor via a pipe, pressurized fluid, such as high pressure air, cannot flow in. High-pressure air flows in from the pipe and fills the fluid storage section in the fluid control housing and the fluid storage chamber in the electromagnet housing through the small gas flow hole of the movable valve, filling the fluid storage section and the fluid storage chamber. The high pressure air is balanced and the movable valve is held adhesively on the outlet pipe end face. When the electromagnet is energized, the movable valve is attracted to the electromagnet by the magnetic force of the electromagnet, and the high-pressure air filling the fluid reservoir and the high-pressure air flowing in from the inflow pipe flow through the outflow pipe and flow out of the valve device. When power to the electromagnet is cut off, the movable valve is pressed against the end face of the outflow pipe by the high pressure air stored in the fluid storage chamber, and the outflow of the high pressure air to the outside of the valve device is blocked.

During the above-mentioned movement, since the adsorption surface of the electromagnet is half on one side of the approximate midpoint of the full width of the movable valve, the other end of the movable valve is used as a fulcrum, and the movable valve attracts and separates from the electromagnet. Even if the volume of the electromagnet is reduced in size, the movable valve operates easily, and high-pressure air can flow out from a point with a large movable width away from the movable fulcrum of the movable valve, so the movable range of the movable valve can be improved compared to conventional devices. Therefore, the operating speed of the movable valve can be greatly improved, and especially if the valve device of the present invention is adopted in a color sorter, the configuration of the different color particle sorting section, i.e., the supply section of the color sorter, can be reduced. This has great effects, such as being able to downsize the entire device such as the charging chamber, reducing the construction cost, and improving the sorting ability.

EXAMPLE The present invention will be explained based on FIGS. 1 and 2. A coil 1 is wound around a soft iron core 2, and an L-shaped soft iron plate 3 is connected to the soft iron core 2 to form an electromagnet 4.

The electromagnet 4 is connected to an end 5 of the L-shaped soft iron plate 3 and an end 6 of the soft iron core 2.
One part of the electromagnet housing 8 is made to dew quickly and the other part is buried in a non-magnetic material such as resin, and the exposed space around both ends 5.6 is formed as a fluid storage chamber 7 in the electromagnet housing 8.

, 9 are lead wires connected to the coil 1.

Reference numeral 10 denotes a fluid control housing, which is formed to have approximately the same external shape as the electromagnet housing 8.

The fluid control housing 10 is provided with a penetrating pressure fluid inflow pipe 11, and a penetrating pressure fluid outflow pipe 12 located slightly opposite to the inflow pipe 11 from approximately the center of the housing 10. , a ring 13 provided with a thread is embedded in the inner wall of the housing 10, and a thread provided on the outer peripheral surface of the outflow pipe 12 is screwed into the thread of the ring 13, so that the end 12 of the outflow pipe 12 is
The degree of protrusion of A into the housing 10 can be adjusted in and out. A stepped portion 1 is provided on the inner wall portion 14 of the fluid control housing 10.
5, the movable valve 16 is loosely inserted into the stepped portion 1.
The upper end surface 11A of the inflow pipe 11 is located at a lower position than 5, and 17 is a fluid reservoir provided in the space of the housing 10;
18A and 18B are screws for fastening the electromagnet housing 8 and the fluid control housing 10.

(See Figure 2) One movable valve is made of a soft iron plate, and its shape is the same as the step 15 provided on the inner wall 14 of the control housing 10, and one end 19A of the movable valve 19 A small hole 20 for gas circulation is bored in the hole 20.
is in communication with the inflow pipe 11.

The operation of the above configuration will be explained below. Connect the electromagnet housing 8 and the fluid control housing 10 with the screw 18.
The valve device 21 formed by fastening the inflow tubes 11 and 18B is connected to a pressure fluid source (not shown) such as a compressor at the outer end of the inflow pipe 11 via a pipe etc. High-pressure air flows in from the inflow pipe and fills the fluid storage section 17 and the fluid storage chamber 7 through the small hole 20 of the movable valve 19 . The movable valve 19 is connected to the fluid reservoir 17
The high-pressure air filling the fluid storage chamber 7 is balanced, the movable valve 19 is held adhesively to the upper end surface 12Δ of the outflow pipe 12, and the high-pressure air supplied from the inflow pipe 11 does not flow out from the outflow pipe 12. . When the electromagnet 4 is energized.

One movable valve is attracted to the electromagnet 4 by the magnetic force of the electromagnet 4, and at the same time, the high-pressure air filling the fluid reservoir 17 and the high-pressure air flowing in from the inflow pipe 11 flow through the outflow pipe 12 and flow out of the valve device 21. . When the power to the electromagnet 4 is cut off, the movable valve 19 is pressed and adhered to the upper end surface 12A of the outflow pipe 12 by the high pressure air stored in the fluid storage chamber 7, and the high pressure air flows out of the valve device 21. is blocked.

When the electromagnet 4 of the movable valve is attracted to the electromagnet 4, the end 6 of the soft iron core 2, which is the adsorption action part of the electromagnet 4, and the end 5 of the L-shaped soft iron plate 3 are located approximately in the middle of the full width of the movable valve 19. The movable valve 19 is attracted to the other half of the small hole 20 rather than the point, and the small hole 2o side of the movable valve contacts the stepped portion 15 and acts as a fulcrum P, and the movable valve 19 is easily attracted to the electromagnet 3. Ru. In addition, since the high-pressure air outflow pipe 12 is located further away from P, which is the fulcrum during operation of the movable valve 19, the movable valve 19
A gap between the lower surface of the outlet pipe 9 and the upper end surface 12A of the outflow pipe 12 is sufficiently opened to allow a large amount of high-pressure air to flow out. When the valve device of the present invention is used in a color sorter that does not require a large amount of high-pressure air to flow out and whose performance is important, the outflow pipe 1
2 to adjust the degree of protrusion of the upper end surface 12A, and narrow the gap between the movable valve 19 and the end surfaces 5° and 6 of the electromagnet 4 to the required amount of outflow of high-pressure air. The speed at which the valve device 21 operates can be increased, and the electromagnetic capacity t required for its operation can be reduced to save power, and the form of the electromagnet 4 can be made smaller, so that the entire valve device 21 can be made smaller.

3 and 4 show an embodiment in which the valve device 21 of the present invention is mounted on a polygonal body 22 to reduce the area of the valve device in the width direction. Valve devices 2IA, 21B, and 21C are attached to the polygonal surfaces 22A, 228.22G of the polygonal body 22, respectively, and the polygonal surfaces 22A, 22B, and 22C have pressure fluid inlets communicating with the outflow pipe 12 of the valve device 21. 23A, 23B, 23
A crimp plate 25 with a plurality of pores 24A, 24B, and 24C formed on one side end surface 22r of the polygonal body 22 is fixed with screws 26A and 26B, and the jets 24A,
24B, 24G and inflow ports 23A, 23B, 23G are communicated through air circulation holes 27A, 27B, 27C.

The one shown in FIG. 5 is a color sorting machine, in which the lower part of the supply hopper 20 is connected to a vibrating supply gutter 32 equipped with an electromagnet 31, and the tip of the supply gutter 32 is connected to a falling gutter 33, so that the raw material for granular material is Formed in the supply section. In the sorting room 34, there is a drainage gutter 33.
A light source 3 is placed near the trajectory A of the particulate matter flowing down into the air.
5. Background 36. A light-receiving element 37 is provided, and a fine uF output tube 38 is erected on an extension of the flow trajectory A. The bottom opening 39 of the sorting chamber 34 is used as an outlet 40 for dissimilar particles, and a valve device 21 is provided in the flow path of the flow path A of the granules. The light receiving element 37 and the valve device 21 are the control device 4
Contacted via 1.

The operation of the color sorter will be explained below. The mixed particles of different colors of the sorted raw material that flowed down from the supply hopper 30 to the vibrating supply gutter 32 are transferred to the vibrating supply gutter 3 by the vibration action of the electromagnetic field 531.
The mixed particles flow from the discharge section 2 to the downflow gutter 33 of the raw material supply section, and the particles mixed with the different color slide down the bridge surface of the flowdown gutter 133 and are discharged from the end of the downflow gutter to the downward trajectory A in the air in the sorting chamber 34. A light source 35 irradiates particles flowing down on a falling trajectory A, the amount of light obtained from the particles and a background 36 is detected by a light receiving element 37, and the detection signal is communicated to a control device 41.

The light receiving element 37
When the detection signal deviates from the reference light amount value, the control device 41 issues an output signal to the valve device @ 21, operates the valve device 21, and uses its jet to eliminate the different color particles from the falling trajectory A. are discharged outside the machine from the unusual particle discharge port 40, and normal particles within the reference light amount value flow down the flow trajectory A and are taken out from the fine product discharge fi 38.

In color sorting machines that require large capacity, the total width of the sorting chamber, which is equipped with multiple particulate material supply devices, light sources, backgrounds, light receiving elements, etc., has conventionally been limited to the size of the valve device. The valve device 2 of the present invention was the maximum that could be configured with the minimum width by closely installing the valve device in parallel.
1 as shown in Figures 3 and 4, the width of the jet ports can be formed to the width of the machine where multiple rows are arranged in parallel, the overall width of the sorting machine can be made smaller, and the configuration cost can be reduced, as well as the above-mentioned As described above, the number of operations per unit time of the valve device is greatly improved compared to the conventional valve device, and there is a remarkable effect that the sorting accuracy and capacity of the sorting machine can be increased.

Effects of the Invention As explained above, in the present invention, since the adsorption action part of the electromagnet is located in one half of the movable valve from approximately the middle part,
The other end of the movable valve becomes a movable fulcrum of the movable valve, and can be easily attracted even with the magnetic force of a small electromagnet, and the movable valve can be operated at high speed. In addition, since the high-pressure air outflow part when the movable valve is operated is located further away from the fulcrum of the movable valve, a sufficient gap is provided for the high-pressure air outflow, allowing a large amount of high-pressure air to flow out even if the operating range of the movable valve is small. I can do it. If the present invention is installed in a color sorting machine that requires a valve device that has a small outflow of high-pressure air and operates many times per unit time, the sorting accuracy and capacity of the sorting machine can be increased.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing the valve device of the present invention, Fig. 2 is a plan view of the same movable valve, and Fig. 3 shows an embodiment in which a plurality of the same valve devices are installed! 4 is a front view of FIG. 3, and FIG. 5 is a side view of an embodiment in which the same valve device is installed in a color sorter. DESCRIPTION OF SYMBOLS 1... Coil, 2... Soft iron core, 3... L-shaped soft iron plate, 4... Electromagnet, 5... End of L-shaped soft iron plate, 6...
- End of soft iron core, 7...Fluid storage part, 8...Magnet housing, 9...Lead wire, 10...Fluid control housing, 11...Inflow pipe, 12...Outflow tube, 13
...Ring, 14...Inner wall part, 15...Step part, 1
7... Fluid storage part, 18A, 18B... Fastening screw, 19... Movable valve, 19A... One end of movable valve, 20... Small hole, 21... Valve device, 22・
... Polygon, to 23, 23B, 23G... inlet,
24A. 248.240... Ejection port, 25... Crimping plate, 26A. 26B... Screw, 27A, 27B, 27C... Electricity distribution hole, 31... Electromagnet, 32... Supply gutter, 33.
...Flowing gutter, 34...Sorting room, 35...Light source, 36
...Background, 37...Photodetector, 38...
- Precious product discharge pipe, 39...bottom opening, 30...discharge port for uniquely colored particles, 41...control device.

Claims (3)

[Claims] (1) An L-shaped soft iron plate is connected to a soft iron core around which a coil is wound to form an integrated electromagnet, and the electromagnet is connected to both ends of the soft iron core and the L-shaped soft iron plate using a non-magnetic material such as resin. A fluid storage chamber is provided around both ends to form an electromagnet housing, and a pressure fluid inflow pipe and a pressure fluid outflow pipe are separately provided, and a pipe body of the outflow pipe is provided. A fluid control housing is made to protrude beyond the inflow pipe, and a space is provided between the outflow pipe and the inflow pipe to serve as a fluid storage portion, and the fluid control housing is formed in substantially the same shape as the electromagnet housing, and A peripheral wall is provided on one side of the fluid control housing to provide a space in which a movable valve for fluid is inserted, a small hole for gas circulation is bored at one end of the movable valve, and the electromagnetic housing and The movable valve is interposed between the fluid control housing and the two housings are fastened together to form a valve device, and the movable valve is controlled by a gap between the outflow pipe and both ends of the electromagnet. A pressure fluid valve device, characterized in that the range is regulated, the inflow pipe of the fluid communicates with the small hole of the movable valve, and the outflow pipe is disposed on an extension line between both ends of the electromagnet. . (2) The pressure fluid valve device according to claim (1), wherein the pipe body of the outflow pipe is installed so that the degree of protrusion into and out of the fluid control housing can be adjusted. (3), individual jet ports are arranged in parallel on one side end face of the polygon,
A pressure fluid inlet is formed in the polygonal surface and communicates with the jet outlet, and a plurality of the valve devices are installed so that the inlet of each of the polygonal surfaces communicates with the outlet pipe. A pressure fluid valve device according to range (1) or (2).