JP2688307B2 - Slide sealing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a slide seal device for a valve chamber through which a fluid containing dust such as high temperature iron ore particles or powder passes.

[0002]

2. Description of the Related Art A conventional thermal fluid seal device of this type is provided with an opening / closing valve in a fluid passage pipe through which a high temperature fluid of 900 ° C. or higher passes, and by closing the opening / closing valve, the inside of the fluid passage pipe is moved into the valve chamber. It stopped the inflow of high temperature dust and gas.

[0003]

However, in the conventional slide seal device as described above, the sealing surface of the valve body of the on-off valve provided in the fluid passage pipe is easily damaged by high temperature, and the life is extremely short. However, there is a drawback that it is very difficult to maintain a good sealing condition.

In view of the above-mentioned conventional drawbacks, an object of the present invention is to provide a slide seal device capable of avoiding damage to the seal surface due to high temperature, having a long life, and maintaining a good seal state for a long period of time. Especially.

[0005]

In order to achieve the above object, the gist of the present invention is to provide an airtight valve chamber formed of a wall surface having a heat radiation property, and to arrange the valve chamber approximately at the center of the valve chamber. 1
A partition wall capable of dividing the valve chamber into two parts, an introduction pipe for guiding a fluid to the valve chamber, a second valve body capable of shielding the opening of the introduction pipe at the inlet of the valve chamber, and the valve. A discharge pipe for discharging fluid from the chamber, a third valve body arranged so as to be able to shield the discharge pipe opening, and slidably fitted on the outer periphery of the introduction pipe, and the introduction pipe is provided in the valve chamber. A slide seal device comprising a sliding pipe connecting the opening and the discharge pipe opening and a drive mechanism for driving the outer sliding pipe, wherein the valve chamber includes an auxiliary chamber, It is configured to retract the sliding tube.

[0006]

In the slide seal device according to the present invention, the radiant heat from the introducing pipe is supplied to the second valve body and the radiant heat from the discharge pipe is supplied to the third valve body.
Since the gas is hermetically sealed by the first valve element provided on the partition wall while being shielded by the second valve element, deterioration of the first valve element due to residual heat is prevented and a reliable sealed state is maintained. Further, since each valve body is not directly exposed to the high temperature fluid, it is not distorted or deteriorated at a high temperature.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of a main part showing a fluid cutoff state of a slide seal device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a main part showing an open state of a slide seal device according to an embodiment of the present invention.

In the figure, reference numeral 11 denotes an airtight valve chamber, which is composed of a wall surface 10 having a heat radiation property. Further, the valve chamber 11 is divided into two parts by a partition wall 13 at a substantially central portion, and a first valve body 12 is arranged at a central opening portion of the partition wall 13 so as to be openable and closable. The valve chamber 11 includes an upper plate, a lower plate, both side plates,
Both the front plate and the back plate are made of a steel plate having no heat insulating material and having heat dissipation and airtightness.

An opening portion of an introduction pipe 14 for introducing a fluid into the valve chamber 11 and a second opening capable of blocking the introduction pipe 14 at the inlet of the valve chamber 11.
The valve body 15 is arranged to be openable and closable. Also, valve chamber 1
An opening portion of a discharge pipe 16 for discharging the fluid from 1 and a third valve body 17 arranged so as to shield the discharge pipe 16 are arranged to be openable and closable.

An auxiliary chamber 20 is connected to the valve chamber 11, and the introduction pipe 14 penetrates the auxiliary chamber 20. On the other hand, the sliding tube 18 is slidably arranged so that it can be retracted into the auxiliary chamber 20 by a drive mechanism 19 composed of an air cylinder or the like. Also, the driving mechanism 1
When the sliding tube 18 is extended into the valve chamber 11 by 9,
The sliding pipe 18 connects the opening of the introduction pipe 14 and the opening of the discharge pipe 16, and the fluid is guided from the introduction pipe 14 to the discharge pipe 16 through the sliding pipe 18, and the temperature inside the valve chamber 11 is increased. The rise can be prevented.

Thermal insulation materials 14a, 18a, 16a are lined on the inner peripheral surfaces of the introduction pipe 14, the sliding pipe 18, and the discharge pipe 16 so that high heat in the pipe line is unlikely to leak to the outside. Further, as shown in FIG. 3, an annular projection 27 is erected on a part of the outer circumference of the introduction tube 14, and an annular projection 28 is erected on the inner circumference of the rear end of the sliding tube 18. Therefore, when the drive mechanism 19 is extended, the protrusion 27 and the protrusion 28
Abut on each other, and the amount of protrusion of the sliding tube 18 can be adjusted.

The first valve body 12 is rotatably supported by an air cylinder (not shown) about a shaft 24. When the sliding pipe 18 is extended, it is retracted from the movement path of the sliding pipe 18. When the sliding tube 18 is stored, it abuts on the valve seat 12a to divide the valve chamber 11 into two parts.

The second valve body 15 is rotatably supported by an air cylinder (not shown) about a shaft 25, and a sliding pipe 18 is provided.
Is retracted from the movement path of the sliding tube 18 when the sliding tube 18 is extended, abuts the valve seat 15a when the sliding tube 18 is housed, closes the inlet of the valve chamber 11, and slides the sliding tube 18 into the auxiliary chamber 20. Store inside.

Further, the third valve body 17 is also the second valve body 1
Similar to 5, the shaft 26 is rotatably supported by an air cylinder (not shown), and when the sliding pipe 18 extends, the sliding pipe 18 is retracted from the movement path of the sliding pipe 18. When it is stored, it contacts the valve seat 17a, closes the opening of the discharge pipe 16 and closes the discharge port of the valve chamber 11.

A part of the auxiliary chamber 20 opens into the valve chamber 11, and the introduction pipe 14 penetrates through the opening from the other end. The sliding tube 18 inserted through the outer circumference of the introduction tube 14 is connected to the moving rod 23 of the air cylinder, which is the drive mechanism 19, by the arm 22. Here, when the moving rod 23 of the air cylinder is extended to the maximum extent, the tip portion of the sliding tube 18 comes into contact with the opening portion of the discharge pipe 16, and when it is contracted to the minimum, the tip portion of the sliding tube 18 is introduced to the introduction tube. It is substantially at the same position as the end of 14. That is, the sliding tube 18 is completely stored in the auxiliary chamber 20 when it is reduced.

Next, the operation of the slide seal device configured as described above will be described. First, when the slide seal device is opened to allow passage of high temperature fluid, each valve element 1
2, 15 and 17 are opened and the driving mechanism 19 is operated to operate the sliding tube 1.
8 is slid into the valve chamber 11 to project (see FIG. 2). When projecting in this way and coming to a predetermined position, the introduction pipe 14 and the discharge pipe 16 are directly connected by the sliding pipe 18, and the introduction pipe 14 in which the high temperature fluid is lined with a heat insulating material,
Since it flows in the sliding pipe 18 and the discharge pipe 16, the valve seats 15a, 1
Neither 2a nor 17a is directly exposed to the high temperature fluid. Therefore, the valve seat does not deteriorate due to heat.

Explaining the case of shutting off the high temperature fluid, first, a cut valve (not shown) provided on the path side of the introduction pipe 14 is closed to stop the high temperature powder and slide by operating the drive mechanism 19. The pipe 18 is moved from the valve chamber 11 to the auxiliary chamber 20. After that, the second valve body 15, the first valve body 12, and the third valve body 17 are closed.

At this time, since the valve seat 12a is located away from the high temperature member, the influence of heat can be reduced. In particular, the second valve body 15 and the valve seat 15a block the hot gas between the metals and the valve seat 12a and the first valve seat 12a provided on the partition wall.
Since the member that has been in contact with the high temperature fluid does not remain in the valve body 12 part, the material such as rubber or asbestos can be used. Therefore, a perfect seal can be obtained.

According to the above embodiment of the present invention, the sliding tube 18
Is stored in the auxiliary chamber 20 and covered with the second valve body 15, heat transfer to the inside of the valve chamber 11 can be effectively prevented, and the second valve body 15 and the valve seat 15a are made of metal. The advantage is that it can sufficiently withstand the heat transmitted from the introduction pipe 14 and the sliding pipe 18.

The present invention is not limited to the above embodiment, and a hydraulic cylinder may be used as a drive mechanism instead of an air cylinder, and is also applied to the case of handling powder other than granules as fluid. Various modifications are possible without departing from the spirit of the invention.

[0021]

As described above, according to the present invention, there are provided an airtight valve chamber having a wall surface having a heat dissipation property and a valve chamber having a first valve body arranged substantially in the center of the valve chamber. A separable partition wall, an introduction pipe for guiding the fluid to the valve chamber, a second valve body capable of shielding the introduction pipe opening at the inlet of the valve chamber, and a discharge pipe for discharging the fluid from the valve chamber, A third valve body, which is arranged so as to shield the discharge pipe opening, and slidably fitted around the outer circumference of the introduction pipe, and connects the introduction pipe opening and the discharge pipe opening in the valve chamber. Since the slide tube and the drive mechanism for driving the slide tube are provided, it is possible to reliably shut off the thermal fluid. Further, since heat does not reach the partition wall portion provided at the substantially center of the valve chamber and provided with the first valve body, a reliable sealed state can be maintained for a long period of time.

[Brief description of the drawings]

FIG. 1 is a sectional view of essential parts showing a fluid cutoff state of a slide seal device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts showing an open state of the slide seal device according to the embodiment of the invention.

FIG. 3 is an enlarged cross-sectional view of a sliding tube portion of a slide seal device according to an embodiment of the present invention.

[Explanation of symbols]

 10 wall surface 11 valve chamber 12 first valve body 12a valve seat 13 partition wall 14 introduction pipe 15 second valve body 15a valve seat 16 discharge pipe 17 third valve body 17a valve seat 18 sliding pipe 19 drive mechanism 20 auxiliary chamber 21 Opening 22 Arm 23 Moving Rod 24, 25, 26 Shaft 27, 28 Annular Protrusion

Claims (2)

(57) [Claims] 1. An airtight valve chamber formed of a wall surface having a heat dissipation property, a partition wall which is provided at a substantially central portion of the valve chamber, and is capable of dividing the valve chamber into two partitions, and the valve chamber. An inlet pipe for guiding fluid to the valve, a second valve body capable of shielding the inlet pipe opening at the inlet of the valve chamber, a discharge pipe for discharging the fluid from the valve chamber, and a shield for the discharge pipe opening. A disposed third valve body, a sliding pipe slidably fitted on the outer periphery of the introduction pipe and connecting the introduction pipe opening and the discharge pipe opening in the valve chamber, and the sliding pipe. And a drive mechanism for driving the slide seal device. 2. The slide seal device according to claim 1, wherein the valve chamber has an auxiliary chamber for accommodating the sliding pipe, and the sliding pipe is retracted into the auxiliary chamber.