JPS607144B2 - Gotsuguru valve loosening device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a goggle valve loosening device.

The goggle valve has a valve body slidably arranged orthogonal to the flow path for a fluid flow hole formed in the goggle valve, and includes a through hole through which fluid passes and a groove that blocks the flow path. The valve body is pressed against a seal ring of a short pipe provided above the flow hole of the valve sparrow, and the flow hole is closed fluid-tightly.Recently, a hydraulic cylinder device has been adopted as a loosening device for the valve body, and the valve body Attempts have been made to simplify the structure of

As shown in FIG. 5, the above device connects a hydraulic cylinder 2 to a movable short pipe 3 that presses a valve body 6, and connects a switching valve 41 and a pilot type check valve 42 between the hydraulic cylinder 2 and an oil tank 40. They are connected by conduits 43, 44, and 45 equipped with.

In order to establish airtightness between the flow hole and the valve body 6, first, one solenoid (SOLB) of the switching valve 41 is energized to connect the pipes 44 and 4.
5 through the lotus to enable the oil in the hydraulic cylinder 2 to be discharged. Therefore, the spring 21 built into the cylinder 2 is not subjected to hydraulic resistance, so it is extended and the piston rod 22 is pushed out, and the movable short pipe 3 is moved to the outflow side short pipe 13.
Elastic seal rings 5, 51 attached to each short pipe 3, 13
is secretly supported by the valve body 6. Next, the solenoid (SOLB)
is demagnetized to cut off conduits 44 and 45.

However, when the valve is closed and the seal rings 5, 51 are pressed against the valve element 6 as described above to make it airtight, when the upstream fluid pressure increases, the valve element 6 is pressed against the seal ring 5 on the outflow side.
is elastically deformed and transferred to the outflow side.

At this time, in the cylinder 2 connected to the moving short pipe 3, the oil pipe 45 is blocked, and the oil in the cylinder 2 fills the cylinder and the pipe and is not discharged from the cylinder 2. , the spring 21 is prevented from expanding, and the piston rod 22 cannot follow the movement of the valve body 6. Therefore, a gap was created between the seal ring 5 of the movable short pipe 3 and the valve body 6, causing leakage. In view of the above circumstances, the present invention provides an accumulator in the hydraulic circuit of the cylinder connected to the moving short pipe, so that when the valve body is moved by the fluid pressure upstream of the valve body, the piston of the loosening device follows the valve body. The object of the present invention is to provide a loosening device for a goggle valve that maintains complete liquid tightness. The present invention will be specifically described below based on embodiments shown in the drawings.

As is well known, the valve bonito 1 of the goggle valve is formed into a fan-flat hollow body, and the front and rear walls 11 and 12 of the valve weight 1 have short pipes 13 and 14 formed through the fluid circulation holes facing each other on the same line. A movable short pipe 3 having approximately the same inner diameter as the communication holes of the short pipes 13 and 14 is arranged between the base end surfaces of the short pipes 13 and 14 in the valve 1 so as to be able to freely slide in the direction of the communication holes. Ru.

The proximal end surface of the short pipe 13 on the outflow side and the outflow end of the movable short pipe 3 are fluid-tightly connected by an extensible pipe 31 that can be expanded and contracted like a bellows. A flange 32 on which piston rods 22 of a plurality of hydraulic cylinder devices arranged in a circle toward the outer circumference of the pipe 3 protrudes from the circumference of the movable short pipe 3.
Connect to. The cylinder 2 of the hydraulic cylinder device is connected to a hydraulic circuit device 4 to be described later, and when the circuit device 4 is switched, the piston rod 22 is pushed out by the biasing force of a spring 21 built into the cylinder 2, and the movable short pipe 3 is moved to the outflow side. The moving short pipe 3 is moved toward the short pipe 13, or the working oil is allowed to flow into the cylinder 2, and the piston rod 22 is pushed back against the spring 21, thereby moving the moving short pipe 3 in the direction away from the short pipe 13 on the outflow side. It is something. Outflow side short pipe 13
Elastic seal rings 5, 51 are provided on the opposing end surfaces of the movable short pipe 3, and both seal rings 5, 51 are provided.
In the gap therebetween, a valve body 6 is disposed so as to be slidable laterally perpendicular to the flow hole. The valve body 6 has two annular contact surfaces 61 having the same inner diameter as the communication hole between the connecting villages 9 arranged vertically.
62 were arranged side by side, one annular contact surface 61 constituted a valve closing body 63 made of iron as a closing plate on the inside, and the other annular contact surface 62 constituted a valve opening body 64 with a through hole opened inside. It is something.

The valve cover 1 has a rail 7 above the base end of the short pipe 13 on the outflow side.
A groove hole 71 is provided on the lower surface of the rail 7 along its entire length.

A hanging punch 65 protrudes from the upper side of the valve body 6 into the slot 71 of the rail 7.
rollers 6 installed on both front and rear sides of the upper end of the hanging village 65.
6 and 66 are placed on the rail surfaces 70 and 70 on both sides of the slot 71, respectively, and the valve body 6 is suspended from the rail surfaces 70 and 7 and is moved back and forth along the rail surfaces 70. A reciprocating drive device 73 such as a hydraulic cylinder device is attached to one end of the rail 7, and the drive device 73 and the valve body 6 are connected.

By the operation of the reciprocating drive device 73, the valve body 6 is reciprocated along the rail 7, and the barrier body 64 or the valve closing body 63 alternately enters the valve lotus 1 and moves into the short moving tube 3. Short pipe 13 on the outflow side
In between, it coincides with the communication hole.

Above and below the valve body 6, vertical locking plates 92 are installed in parallel over the entire length of the valve body via arm punches 91 that protrude from the connection village 9 toward the inflow side. A bracket 33 is provided to protrude from the upper flange 32 toward the outflow side of the vertical locking plate 92, and a roller 34 is fixed on the bracket 33.
4 is opposed to the outflow side side surface of the vertical locking plate 92 to constitute a locking means 93 for the valve body.

The gap 52 between the short pipe 13 and the seal rings 5, 51 of the movable short pipe 3, which face each other with the valve body 6 in between, is sufficiently wider than the thickness of the annular contact surfaces 61, 62 of the valve body 6. slot 7
1 is also formed to be sufficiently wider than the thickness of the suspension 65, so that the valve body 6 not only moves back and forth along the rail 7, but also moves within the range allowed by the width of the gap 52 and the slot 71. The body 6 can also be moved away from the sealing ring 51 of the outlet short pipe 13.

In the above goggle valve, the hydraulic circuit device 4 of the loosening hydraulic cylinder 2 includes a suction pipe 43 connected to a metering hydraulic pump 46 and a discharge pipe 44 with a check valve 47 interposed therebetween.
is connected to the switching valve 41, the lower ends of each of the pipe passages 43 and 44 are connected to the oil tank 401, and the switching valve 41 and the above-mentioned loosening cylinder 2 are connected via a pilot check valve 42 through a pipe 45. At the same time, an accumulator 8 is provided in the pipe line 45 between the pilot type check valve 42 and the cylinder 2.

The above-mentioned accumulator 8 has a hydraulic chamber 82 and a gas chamber 8 separated by a partition wall 81 that is movable within the accumulator tank.
The gas chamber 83 is filled with an inert gas such as nitrogen gas, or a compression spring (not shown) is attached to the partition wall 81.
The hydraulic pressure is absorbed by the elastic deformation of gas or springs.

The switching valve 41 is an electromagnetic 3-boat 3-position switching type, and when the solenoid (SOLA) of the switching valve 41 is energized, the suction pipe 43 and the cylinder 2 are passed through, and the solenoid (SOLB) is energized.
) is energized, the discharge pipe 44 cylinder 2 is operated,
When each solenoid (SOLA, SOLB) is demagnetized, the switching valve 41 is in a neutral position.

As shown in FIG. 3, when the moving short alarm 3 is pressed against the valve body 6 by the spring 21 of the cylinder 2, the switching valve
is in the neutral position and blocks off the pipe 45 on the cylinder 2 side, the discharge pipe 44, and the suction pipe 43.However, when the goggle valve is opened and closed, the solenoid (SOLA) of the switching valve 41 ) is excited to pass through the pipes 43 and 45, and the pump 46 is operated to send working oil into the cylinder 2, compressing the spring 21 and pushing back the piston rod 22.

At this time, the movable short pipe 3 is separated from the valve body 6, and then the valve body 6 is separated from the outflow side short pipe 13 by the rollers 34 of the movable short pipe 3. After releasing the valve body 6 from the seal rings 5, 51 as described above, the solenoid (SOLA) is demagnetized and the switching valve 4
1 to return to the neutral position.

The plate and valve body 6 in the above state are moved to a predetermined position by the reciprocating drive device 73. When the valve body 6 is stationary, the solenoid (S
When the spring 2
1 extends and pushes out the piston rod 22, and the valve body 6 is sandwiched between the movable short pipe 3 and the outflow side short pipe. When the seal rings 5, 51 of each short pipe 3, 13 come into close contact with the valve body 6, the solenoid (SOLB) is extinguished to return the switching valve 41 to the neutral position.

In the above state, fluid pressure acts on the valve closing body 63, and the valve body 63
is pushed toward the outflow side, and the valve body 6 moves against the seal ring 5 of the short pipe 3.
When the cylinder 2 and the pipe 45 move away from each other, the working oil in the cylinder 2 and the pipe 45 is discharged into the accumulator 8 by the biasing force of the spring 21, so the spring 21 can follow the movement of the valve body 6 without delay, and the spring 21
The piston rod 22 is pushed out by the extension of the piston rod 22, causing the movable short pipe 3 to follow the movement of the valve body 6.

That is, the seal ring 5 of the movable short tube 3 and the valve body 6 are prevented from coming apart, and airtightness is always maintained. As described above, the present invention connects the accumulator 8 to the hydraulic circuit of the hydraulic cylinder 2 for driving the movable short pipe 3 that presses the valve body 6,
Because it forms an escape area for the working oil in cylinder 2,
Even if fluid pressure acts on the valve body 6 and the valve body 6 moves in the direction in which the piston rod 22 of the cylinder 2 extends, the working oil flows out to the accumulator 8 due to the biasing force of the spring 21 of the cylinder 2, and the piston The rod 22 can be pushed out without delaying the movement of the valve body 6, and there is no gap between the valve body 6 and the seal ring 5 of the movable short tube 3, which has the advantage that the valve is always kept completely airtight. vinegar.

Brief description of the drawings: Figure 1 is a front view of the goggle valve, Figure 2 is a side view of the goggle valve, Figure 3 is an explanatory diagram of the hydraulic circuit device, Figure 4 is a cross-sectional view of the valve body when it opens and closes. FIG. 5 is an explanatory diagram of a conventional hydraulic circuit device.

2...Hydraulic cylinder, 3...Moving short pipe, 4...Hydraulic circuit device 6...Valve body,
8... Accumulator.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A valve body is slidably provided perpendicular to the flow hole in the valve housing,
A goggle valve that connects a hydraulic cylinder device with a built-in spring to a short pipe placed on the same axis as the flow hole, facing the transition path of the valve body, and presses the short pipe against the valve body by the biasing force of the spring against the piston rod. The hydraulic cylinder device is characterized in that a hydraulic pump is connected through a three-position switching valve having a neutral position, and an accumulator is connected to a conduit connecting between the switching valve and the cylinder. Loosening device.