JPH0443645Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a valve that interrupts the downstream transportation of various powders such as coal powder. The present invention relates to a powder-containing gas valve having a sliding valve body in a substantially horizontal position.

[Conventional technology]

Conventionally, in the above-mentioned powder-containing gas valve, the annular seat on the valve body side relative to the sliding valve body in the horizontal position is composed of a fixed seat, and the valve body is closed by a wedge action as the valve body slides toward the valve closing side. A wedge was provided to press the valve body against the fixed annular seat on the valve box side, and sealing was achieved by pressing the valve body.

[Problem that the invention attempts to solve]

However, in the case of the conventional structure described above, during the sliding of the valve body toward the valve closing side, transported powder tends to get caught in the gap between the valve body and the fixed annular seat on the valve box side. There are problems such as the valve body becoming difficult to operate due to congestion, or in the worst case, becoming impossible to operate, or increasing the leakage of the primary side gas in the piping. Since the sliding valve body is pressed by the wedge action of There was a problem that the sealing performance was deteriorated due to insufficient sealing performance.

The purpose of the present invention is to prevent malfunction of the valve body caused by trapped transported powder and leakage of the gas body by simply improving the assembly structure of the annular seat on the valve box side, and to prevent leakage of the gas body caused by wear and tear. The purpose is to avoid deterioration in sealing performance.

[Means for solving problems]

The characteristic configuration of the valve for powder-containing gas according to the present invention is that a fixed annular seat on the valve body side is provided on one of the upstream and downstream sides with respect to the valve body, and a movable annular seat on the valve body side is provided on the other side. A disc spring interposed between the spring receiving part of the box and the spring locking part of the movable annular seat on the valve box side presses and urges the movable annular seat on the valve body side toward the valve body, and The stop portion and the spring locking portion are formed in a shape that abuts the disc spring, and a gap is formed between the valve box side movable annular seat and the valve box. Its action and effects are as follows.

[Effect]

The disc spring maintains the fixed and movable annular seats and the valve body in a press contact state, and seals the space between the seat and the valve body so that the transported powder is contained, and prevents wear of the seat etc. and transported powder. Maintains a seal regardless of body bite.

The disc spring is supported by the spring receiving part of the valve box so that it does not shift in the sliding direction of the valve body, and the movable annular seat is attached to the valve body in order to make contact with the spring retaining part of the movable annular seat. Support it so that it does not move.
Furthermore, due to the ring shape of the disc spring,
The movable annular seat and the valve box are connected to separate the flow path inside the valve box from the outside, and the leakage of powder from this area is prevented. A large gap is formed so that even if transported powder gets into the space between the movable annular seat and the valve box, it can be pulled out relatively easily and is unlikely to remain clogged.
In addition, the movable annular sheet can be held even if the sheet is made to be less prone to wear, and the gap can be sealed without the need for special sealing materials such as bellows or O-rings.

[Effect of idea]

By pressing and holding the movable annular seat with the disc spring, it is possible to prevent powder from clogging between the valve box and the movable seat, and to prevent powder from getting caught between the valve body and the seal. In addition to preventing jamming, even if the seal is worn out due to jamming, the seal is effective and high reliability is achieved so that a good seal can be maintained over a long period of time. Summer.

Furthermore, it is only necessary to interpose a disc spring between the valve box and the movable annular seat, making it easy to remodel and requiring no special sealing materials such as bellows or O-rings, making it possible to obtain the valve at low cost.

〔Example〕

Next, an embodiment will be described based on FIGS. 1 to 3. In addition, Fig. 1 shows that the sealing direction when the valve is closed is
FIG. 2 shows a case where the sealing direction is in the same direction as the flow direction when the valve is opened, and FIG. 2 shows a case where the sealing direction is in the opposite direction to the flow direction.

A plate-shaped valve body 2 in a horizontal state is connected to an upstream flow passage and a downstream flow passage through a valve body hole 24 formed in the vertical right cylindrical flow passage F formed in the valve box 1. It is provided so as to be able to freely slide in the direction of the plate surface between the open valve position where the valve communicates and the closed position where the flow path F is blocked by the blank plate-shaped portion 2B, and to contact the valve body 2. Valve box-side annular sheets 3 and 4 are provided on the upstream side and the downstream side of the valve body 2, respectively, to prevent leakage at the valve body insertion portion of the flow path F. A powder-containing gas valve is configured to interrupt passage of the transported powder across the flow path outlet.

As shown in FIG. 1, one of the valve body side annular sheets 4 is arranged to form a gap S with the valve body 1, and the valve body side annular sheet 4 is pressed against the valve body side. The valve body 1 is attached to the valve body 1 via an annular disc spring 5 which acts as a biasing force. The annular disc spring 5 is connected to a spring receiving portion 1C of the valve box 1 and a spring locking portion 4A of the valve box side annular seat 4.
and the spring receiving part 1C.
The shape of the spring locking portion 4A is such that it comes into contact with the inner peripheral side edge of the annular disc spring 5 toward the outside of the disc spring, and the shape of the spring locking portion 4A is such that it comes into contact with the outer peripheral side edge of the annular disc spring 5 toward the inside of the disc spring. Due to the shape, the spring receiving part 1
C and the spring locking portion 4A are configured to prevent the annular disc spring 5 from moving in the sliding direction of the valve body.

That is, the valve box side movable annular seat 4 is held by the valve box 1 via the disc spring 5, and the disc spring 5
The elastic biasing force causes the valve body side movable annular seat 4 to be constantly elastically pressed into contact with the valve body 2 and the valve body side fixed annular seat 3 of the valve body 2, thereby creating a seal. It is configured to do this.

Hereinafter, to explain the usage pattern shown in FIG. 2, each of the valve box-side annular sheets 3 and 4 is
The upstream annular seat 3 to be positioned above the valve body 2 is formed into a right cylindrical shape and arranged concentrically with the flow path F to form the valve body. Portion 1 corresponding to the upstream flow path outlet of box 1
It is fixedly attached to A in a mated state.

For the downstream annular seat 4 located below the valve body 2, the inner circumferential surface of the valve box in the portion 1B corresponding to the inlet of the downstream flow path to which the downstream annular seat 4 is attached is cut with a larger diameter toward the upstream side. The downstream side annular seat 4 is formed into a truncated conical shape and also has a truncated conical shape with a larger diameter toward the upstream side. An annular disk spring 5 is arranged on the downstream side, which is arranged concentrically with the flow path F so that a clearance S is formed around the circumference, and which presses and urges the downstream annular sheet 4 toward the valve box 2 side. It is installed in the valve box 1 so that it can be elastically displaced only in the axial direction of the flow path, interposed between it and the flow path inlet corresponding portion 1B. The annular disc spring 5 is interposed between the spring receiving portion 1C at the flow path inlet portion 1B of the valve box 1 and the spring locking portion 4A of the downstream annular seat 4, and the spring receiving portion 1C is The shape is such that the annular disc spring 5 is prevented from moving in the sliding direction of the valve body due to its shape in contact with the outer peripheral side edge of the annular disc spring 5, and the spring locking portion 4A has an annular shape. The valve body 1 is configured to prevent the annular disc spring 5 from moving in the sliding direction of the valve body due to its shape in contact with the inner peripheral side edge of the disc spring 5 toward the outside of the disc spring. The structure is such that the downstream annular sheet 4 can be held by the disc spring 5 and the downstream annular sheet 4 can be pressed and biased by the disc spring 5.

In other words, the elastic biasing force of the disc spring 5 causes the downstream valve box side movable annular seat 4 to move toward the valve body 2, and
The valve body 2 is configured to be always elastically pressed into contact with the upstream fixed annular sheet 3 on the valve box side to achieve sealing.

Further, in a state where the downstream valve box side movable annular seat 4 formed in a truncated cone shape with a larger diameter toward the upstream side is used as a downstream guide member, the downstream side flow path inlet corresponding part 1B of the valve box 1 is
This prevents transported powder from being caught between the movable annular sheet 4 and the movable annular sheet 4, thereby maintaining the elastic displacement operation of the movable annular sheet 4 on the downstream side of the valve box in a good manner.

6 in the figure is a sleeve pipe attached to the upstream flow path, and purge fluid is supplied under pressure from the purge fluid supply pipe 7 between the sleeve pipe 6 and the inner peripheral surface of the valve box, and the purge fluid is By ejecting the powder from the lower end side of the sleeve pipe 6 into the flow path F, the powder accumulated on the blank plate-like portion 2B of the valve body 2 is removed, thereby removing the powder that accompanies the opening sliding of the valve body 2. It is configured to more effectively prevent accumulated powder from being caught between the valve body 2 and the upstream fixed annular sheet 3.

Further, 8 in the figure is a seal ring.

[Another example]

Next, another embodiment will be described.

The specific shapes of the upstream valve box side fixed annular seat 3 and the downstream valve box side movable annular seat 4 can be modified in various ways.

Furthermore, various improvements can be made to the shape and structure of the valve box portion 1B that holds the downstream valve box side movable annular seat 4 via the disc spring 5.

[Brief explanation of drawings]

The drawings show an embodiment of the valve for powder-containing gas according to the present invention, in which FIG. 1 is an enlarged sectional view of the valve seat, FIG. 2 is an overall sectional view, and FIG. 3 is a plate view of the valve body. It is. 1... Valve box, 2... Valve body, 3... Fixed annular seat on the valve box side, 4... Movable annular seat on the valve box side, 5...
Disc spring, F...flow path in the valve box, 1C...spring receiving part, 4A...spring locking part, S...gap.

Claims (1)

[Scope of Claim for Utility Model Registration] A valve for powder-containing gas, which is provided with a sliding valve body 2 in a substantially horizontal position with respect to an upwardly oriented flow path F in a valve box, with respect to said valve body 2. A valve box-side fixed annular seat 3 is provided on one of the upstream and downstream sides, and a valve box-side movable annular seat 4 is provided on the other, and the spring receiving portion 1C of the valve box 1 and the valve box-side movable annular seat 4 are provided. The valve box side movable annular sheet 4 is pressed and biased toward the valve body 2 side by an interposed disc spring 5 between the spring catch part 4A and the spring catch part 1C and the spring catch part 4A.
is formed in a shape that contacts the spring 5 in a direction that prevents the disc spring 5 from moving in the sliding direction of the valve body, and is formed between the valve box side movable annular seat 4 and the valve box 1. A valve for powder-containing gas with a gap S formed at the sides.