JPS59215271A - Fluid opening/closing valve - Google Patents

Abstract

PURPOSE:To enable the operator to operate simultaneously many cutters by providing a mechanism which feeds several kinds of fluids or stops the supply by opening and closing consecutively and automatically several pieces of valves with specified sequence according to the sequence for gas cutting. CONSTITUTION:Passages 2 on a fluid inlet side are provided to a valve body 1 and a sliding rod 8 is freely slidably fitted into a communicating hole 8. Valve plugs 4 are pressed by springs 7 to valve seats 3 so that the heads 5 of actuating rods 6 can be fitted into the ring grooves 10 of the rod 8. The grooves 10 are pierced to the width conforming to the sequence for gas cutting and the supply of gaseous fuel, preheating gas and cutting oxygen or the stop of their supply is performed according to whether the heads 5 are brought into contact with the outside circumferential wall of the body of the rod 8 or fitted into the grooves 10. A mechanism which fixes the rod 8 in the open state and a mechanism which releases the fixing and returns the same to the closed state are provided to said rod. Flowing of various kinds of gases to be used for gas cutting and the instantaneous interruption thereof are made possible by a series of operations.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluid opening/closing pulp that can perform the flow of preheating oxygen, fuel gas, and cutting oxygen in a series of operations when cutting steel materials, and can instantly shut off the flow. be.

When cutting steel materials by installing a conventional gas cutting torch into a Vortapu automatic cutting machine, the preheating acid, fuel gas, and cutting oxygen pulps are opened and closed as appropriate, but each pulp is cut off each time the cutting starts. It is necessary to adjust the spread and form a preheated flame and high pressure oxygen for cutting, which has the disadvantage of poor work efficiency.

In addition, in automatic gas cutting machines, an electromagnetic on-off valve is installed in each fluid supply path, and the movement of the cutting machine is stopped via a limit switch that detects a predetermined position while the cutting machine is running, and the electromagnetic on-off valve is instantly closed. Means for automating the completion of the cutting operation has been used, but this method requires a plurality of electromagnetic on-off valves and their control devices, making the device large and complicated, resulting in high manufacturing costs.

The present invention relates to a novel pulp that has a simple structure, is reliable and quick to operate, and has been developed in view of the above-mentioned drawbacks of the conventional pulp.

One embodiment of the present invention will be explained with reference to the drawings. In FIGS. 1 to 4, A is the openable pulp according to the present invention,
The pulp body 1 is provided with passages 2 which communicate the inlet and outlet of the fluid in parallel so as to be able to supply fuel gas preheating gas and cutting oxygen, respectively, and a valve seat 6 is installed on the inlet side of these passages 2. , has been.

Reference numeral 4 denotes a valve body that can freely slide within the passage 2 on the inlet side of the main body 10, and an actuating rod 6 having a hemispherical head 5 at the rear.
are connected to each other, and the valve body 4 is connected to the passage 2 by a spring 7.
The valve seat 3 is in contact with the valve seat 3 provided in the valve seat 3. Next, 8 is main body 1
A slide rod is slidably fitted into a hole 9 drilled at the rear end, and the groove width is determined according to the cutting sequence so that the head 5 of the actuating part 6 can fit therein. Three ring grooves 10 are bored. Note that the rear end of the passage 2 on which the actuating rod 6 can slide is a hole 9 into which the slide rod 8 is fitted.
Therefore, the head 5 of the actuating rod 6 is connected to the spring 70.
The operating rod 8 is always pressed against the slide rod 8 in the hole 9 by the action, and the heads of the three actuating rods 6 are constructed so as to be able to fit into the three ring grooves 1o of the slide rod 8. Further, a spring 11 is fitted into one end of the slide rod 8, and a mold 12 having a convex portion is fixed, and the mold 12 communicates with a limit switch 16 to form an operating portion 14 of the slide rod 8. A ring groove 15 is bored at the other end, and an operating lever 19 is attached and swung by a pin 16 and an auxiliary bar 17, which is rotatable around a fixed point of the bracket 18. Reference numeral 2o denotes a spring attached to the end of the bracket 18, the end of which is configured so that it can be inserted into the ring groove 15 of the slide rod 8, and is rotatably attached to the bracket 18 via a pin 21. Shaped trigger 2
By rotating 2, the engagement state between the spring 20 and the ring groove 15 can be released.
One end of this trigger 22 is in contact with a stopper 26. - Also, a nipple 24 for connecting a hose is screwed into the fluid inlet of the main body 1, and an 01J ring 25 for preventing gas leakage is provided at a predetermined position of this nipple 24 and the operating rod 6.
is provided. 26 is a nipple provided at the fluid outlet.

In the above embodiment, the opening/closing relationship between the actuating rod 6 and the slide rod 8 and the relationship between them and the fluid are such that when the head 5 of the actuating rod 6 is inserted into the ring groove 10 of the slide rod 8, the valve body 4 is closed. When the head 5 comes into contact with the outer circumferential wall of the main body of the slide rod 8, the valve body 4 is moved in the distal direction by the outer circumferential wall of the slide rod 8 together with the operating rod 6. When pressed, the valve seat 6 is opened and fluid can flow through the valve seat 6.

Next, the operation of the valve according to the present invention will be explained as shown in FIG.
The heads 5 of the actuating rods 6 are respectively fitted into the ring grooves 10, and the valve body 4 is pressed by the spring 7 to close the valve seat 3, so that all fluid flow is stopped. Next, when the lever 19 is moved to the Y position, as shown in FIG. , the upper two valve seats 6 are opened, allowing only the fuel gas fluid and the preheated oxygen fluid to flow, thereby preheating the steel plate to be cut.Finally, the lever 19 is moved to the Z position. When the slide rod 8 is moved, the head of the lowest operating rod 6 also escapes from the ring groove 10, and is pressed by the outer circumferential wall of the slide rod 8, so that the lowermost valve seat 6 also disengages from the ring groove 10. It is opened as shown in FIG. 4, thereby allowing the cutting oxygen fluid to also flow out and allowing the cutting of the steel plate to be cut to be started. At this time, the end of the spring 20 fits into the ring 815 of the slide rod 8, keeping the valve open.

When the prescribed gas cutting work is completed, the trigger 22 hits the stopper 26 due to the external force that collided with the block for stopping the carriage, and the trigger 22 rotates as shown by the broken line in FIG. 2 and fits into the ring groove 15. The end of the spring 20 is pushed down to release the fitted state between the ring groove 15 and the spring 20. As a result, the slide rod 8 is instantly slid by the ring 110 attached to the other end of the slide rod 8, as shown in FIG. The valve is inserted into the valve and shuts off the flow of all fluids, instantly and automatically stopping the gas cutting operation.At this time, the opening/closing state of the valve is determined by the mold 12 fixed to the end of the slide rod 8. and is automatically determined and transmitted by the limit switch 16.

With conventional automatic porta-pull gas cutting machines, the gas opening and closing operations were manual, and the operator had to stand by near the cutting machine at the end of the cutting process, so it could only be operated by one worker. Although there was a limit to the number of units, in the present invention, as described above, several valves are opened and closed automatically in a certain order according to the gas cutoff sequence to supply or stop several types of fluids. Therefore, one worker can perform gas cutting work using several cutting machines at the same time.Furthermore, the valve according to the present invention has a simple structure, can be made compact, and can be produced at low cost. It has features such as high performance and low failure rate.

[Brief explanation of the drawing]

FIGS. 1 to 4 are explanatory diagrams showing the main parts and operating states of the valve of the present invention. Person is the opening/closing valve, 1 is the valve body, 2 is the passage,
3 is the seat, 4 is the valve body, 5 is the head, 6 is the operating rod,
7.11.20 is the spring, 8 is the slide salary,
10. 15 is a groove, 19 is an operating lever, 22
is a trigger, and 26 is a stopper. Patent applicant: Koike Oxygen Industry Co., Ltd. Figure 3 Figure 4

Claims (1)

[Scope of Claims] A valve body with an operating rod connected to the rear thereof is slidably inserted into a flow path of a pulp body having a valve seat inside, and the R and the connecting rod are inserted in the rear part of the pulp body. Holes that intersect the passages are drilled, a slide rod with a cutting sequence programmed is inserted into the hole, and by sliding the slide rod, the actuating rod in contact with the outer circumferential surface of the slide rod is slid to open and close the valve. In the fluid-opening/closing pulp that performs A fluid opening/closing pulp characterized in that a mechanism for releasing the fixing mechanism is provided. (2) A patent claim characterized in that a mold is fixed to one end of a slide rod, and a limit switch is provided on the bracket that is activated by the movement of the mold, and the driving power source is opened and closed in response to opening and closing of the pulp. The fluid-openable pulp according to item 1.