JP2002106727A - Slide valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide valve allowing easy change of maximum opening area of a port. SOLUTION: A tapered inflow side flow passage 2a is formed from an inflow port opened on an upper part of a valve box 1 toward a port P. A cone member 3A is provided at a lower end of the inflow side flow passage 2a. A seat ring 11 is attachably/detachably mounted on the cone member 3A. A valve element 5 advancing/retracting in a horizontal direction and opening/closing the port P is arranged on a lower side of the seat ring 11. An upper through hole 12 and a lower through hole 13 for forming the port P are formed on each of the cone member 3A and the seat ring 11. An inclined surface is formed from an upper end opening 13b where an inner peripheral surface of the lower through hole 13 coincides with the upper through hole 12 toward a lower end opening 13c for forming the port P of set opening area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-temperature slide valve interposed in a flow path for flowing a high-temperature fluid including a powdered powder such as a chemical catalyst in, for example, an oil refinery.

[0002]

2. Description of the Related Art This type of high-temperature slide valve is, for example, as shown in FIGS. The valve box 1 has a flow path 2 through which a high-temperature fluid including a powder fluid flows, and the flow path 2 has an inflow-side flow path 2a having a tapered shape. At the lower end of the inflow-side flow path 2a, a cone member 3A and a seat ring 3B provided on the lower end surface of the cone member 3A are arranged, and through-holes 3a and 3b forming ports are provided in the cone member 3A and the seat ring 3B, respectively. .

A pair of left and right guide rails 4 provided on the lower end surface of the seat ring 3B support a valve body 5 for opening and closing the flow path 2 so as to be slidable in a horizontal direction. Connected to an actuator (not shown) such as a hydraulic cylinder.

The valve box 1 has a heat-resistant material 8 disposed on the inner surface thereof, and the cone member 3A and the valve box 1 are integrally connected by a connecting member 9. A wear-resistant material 10 is lined in a portion where the high-temperature fluid is strongly applied. ing.

[0005]

In the above construction, the valve element 5 is supported by the guide rail 4 and retreats in the horizontal direction to control the flow rate by changing the degree of opening in the through holes 3a and 3b. By the way, the opening area (maximum effective area) of the through holes 3a and 3b formed in the cone member 3A and the seat ring 3B is determined according to the design conditions of the plant, but for the purpose of increasing the processing capacity after the valve is installed. The plant may be expanded or modified, in which case the cone member 3A and the seat ring 3
It is necessary to change the opening area (maximum effective area) of the through holes 3a and 3b of B. However, when changing the opening areas of the through-holes 3a and 3b of the cone member 3A and the seat ring 3B, it is not possible to cope only with replacement or modification of the cone member 3A and the seat ring 3B. As ancillary work, the heat-resistant material 8 applied to the inner surface of the valve box 1 is temporarily removed, and the inflow-side flow path 2a is re-constructed into a new tapered shape. , 3b, it is necessary to adapt to the shape of the opening, and it is difficult to construct on site.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a slide valve capable of easily changing a maximum opening area of a port.

[0007]

In order to solve the above-mentioned problems, a slide valve according to the present invention has a port formed in the middle of a flow path formed in a valve box, and has a port formed at an upper portion of the valve box. A tapered inflow-side flow path is formed toward the port, a valve seat support member is provided at the lower end of the inflow-side flow path, a valve seat is detachably mounted on the valve seat support member, and a horizontal position is provided below the valve seat. A valve body that moves back and forth in the direction to open and close a port, wherein an upper through hole and a lower through hole that form a port are formed in the valve seat support member and the valve seat, respectively, and an inner periphery of the lower through hole is formed. The surface forms an inclined surface from an upper end opening corresponding to the upper through hole to a lower end opening forming a port having a set opening area.

[0008] With the above structure, the fluid flowing from the inlet of the valve box passes through the tapered inflow-side flow path and passes through the upper through-hole of the valve seat support member and the lower through-hole of the valve seat. The valve body moves horizontally to change the opening degree of the port at the lower end opening of the lower through hole of the valve seat, and controls the flow rate of the fluid passing through the port.

The port has a set opening area determined by the design conditions of the plant at the lower end opening of the lower through hole of the valve seat, and has a marginal redundant opening area in the upper through hole of the valve seat support member. ing. For this reason, when changing the control target range flow rate of the valve, without changing the structure of the valve box, only replacing or remodeling the valve seat and changing the shape of the lower through hole, the port setting opening is changed. The area can be easily changed and adjusted to cope with the situation.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Since the basic structure of the slide valve for high temperature of the present invention is the same as that shown in FIGS. 2 to 3 previously, members performing the same operation are denoted by the same reference numerals and description thereof is omitted.

FIG. 1 shows a main part of a high temperature slide valve according to an embodiment of the present invention. In FIG. 1, an inflow-side flow path 2a is formed in a tapered shape from an inflow opening opening at an upper portion of the valve box 1 toward a port P, and a cone member as a valve seat support member is provided at a lower end of the inflow-side flow path 2a. 3A is provided. A seat ring 11 as a valve seat is detachably attached to the cone member 3A by a connecting member 9 together with the guide rail 4. The cone member 3A and the seat ring 11 are respectively formed with an upper through hole 12 and a lower through hole 13 which form a port P, and an inner peripheral surface 13a of the lower through hole 13 matches the upper through hole 12 with an upper end opening 13b. From the lower end opening 13c forming a port having a set opening area.

The operation of the above configuration will be described below. Fluid flowing from the inlet of the valve box 1 passes through the upper through hole 12 of the cone member 3A and the lower through hole 13 of the seat ring 11 through the tapered inflow side flow passage 2a. The flow rate is controlled by moving the valve element 5 horizontally so that the lower through hole 1
3 by changing the opening of the port P at the lower end opening.

The port P secures a set opening area determined by plant design conditions at the lower end opening 13c of the lower through hole 13 of the seat ring 11, and has a marginal redundant opening at the upper through hole 12 of the cone member 3A. Has an area.

For this reason, when the flow rate (upper limit) of the control target range of the valve is changed, only the seat ring 11 is replaced or modified to change the shape of the lower through hole 13 so that the opening area of the lower end opening 13c is reduced. By changing, it is possible to easily change and adjust the set opening area of the port P without changing the structure of the valve box 1.

[0015]

As described above, according to the present invention, the set opening area of the port is ensured at the lower end opening of the lower through hole of the valve seat, and the upper through hole of the valve seat supporting member has a sufficient redundant opening. By setting the area, only the valve seat is replaced or modified to change the shape of the lower through-hole, so that the set opening area of the port can be easily changed and adjusted.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a slide valve according to an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional slide valve.

FIG. 3 is a sectional view of a main part of the slide valve.

[Explanation of symbols]

 P port 1 Valve box 2a Inlet-side flow path 3A Cone member 5 Valve 9 Connecting member 11 Seat ring 12 Upper through hole 13 Lower through hole 13a Inner peripheral surface 13b Upper opening 13c Lower opening

Claims (1)

[Claims] 1. A port is formed in the middle of a flow path formed in a valve box, a tapered inflow-side flow path is formed from an inflow port opened in an upper part of the valve box toward the port, and an inflow-side flow path is formed. A valve seat support member is provided at a lower end of the valve seat, a valve seat is detachably mounted on the valve seat support member, and a valve body that opens and closes horizontally and is opened and closed below the valve seat is disposed. An upper through-hole and a lower through-hole forming ports in the valve seat support member and the valve seat, respectively, and a lower end forming a port of a set opening area from an upper end opening in which an inner peripheral surface of the lower through-hole matches the upper through-hole. A slide valve characterized by forming an inclined surface toward an opening.