JPH09196229A - High temperature slide valve - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To reliably discharge a powdered fluid such as a chemical catalyst accumulated in a recess with a simple structure. A valve seat (3) is provided substantially in the center of a flow path (2) in which a high temperature fluid containing a powdered fluid (a) flows in a valve box (1), and a valve seat (3) in the valve box (1) is located downstream of the valve seat (3). A valve body 6 for opening and closing the flow path 2 is formed on a guide rail 5 having a recess 4 formed therein and extending from the recess 4 to the downstream end surface of the valve seat 3.
In a slide valve for high temperature, which is slidably disposed, the powder fluid accumulated in the concave portion 4 at the tip of the operating rod 16 penetrating the valve box 1 and movably inserted in the concave portion 4. scraper 1 for pushing a into the flow path 2
7 is fixed.

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 installed in the middle of a flow path through which a high temperature fluid containing a powdered fluid such as a chemical catalyst flows in a petroleum refining facility.

[0002]

2. Description of the Related Art Conventionally, an example of this kind of high temperature slide valve is shown in FIG. This is because a valve seat 3 is provided in a substantially central portion of a flow path 2 for circulating a high temperature fluid containing a powder fluid in the valve box 1, and a recess 4 is formed in the valve box 1 on the downstream side of the valve seat 3. And a valve body 6 for opening and closing the flow passage 2 is slidably disposed on a pair of guide rails 5 extending from the recess 4 to the downstream end surface of the valve seat 3.
An opening 7 communicating with the recess 4 is formed on the side wall of the valve box 1, and a cylindrical bearing 9 is integrally projectingly provided on an end plate 8 that closes the opening 7 and is movably inserted into the bearing 9. The tip of the slide rod 10 is connected to the valve body 6, and the slide rod 10 is reciprocated by a hydraulic cylinder such as a hydraulic cylinder (not shown). In addition, 11 is a heat-resistant material lined on the inner surfaces of the valve box 1 and the end plate 8, 12 is a connecting member that integrally connects the valve seat 3 and the valve box 1, 13 is the flow path 2, the valve seat 3 and the valve body 6 Which is a wear-resistant material lined in a portion where the high-temperature fluid is strongly hit, and which is made of a mesh-shaped stainless steel material having a large number of hexagonal holes, and a wear-resistant lining filled in the mesh of the hex steel. It is formed from wood.

In the above structure, as shown in FIG. 3, when the slide rod 10 is retracted from the state where the flow passage 2 is closed by the valve body 6, the valve body 6 slides along the pair of guide rails 5. Then, it is stored in the recess 4. Thereby, the flow path 2 is opened, and the high temperature fluid can be circulated in the flow path 2 in the arrow A direction.

[0004]

SUMMARY OF THE INVENTION In the above conventional configuration,
In the recess 4 and the pair of guide rails 5, powder fluid a such as a catalyst contained in the high-temperature fluid flowing in the flow path 2 may be accumulated, which may hinder the sliding movement of the valve body 6.

Therefore, a purge pipe that penetrates the end plate 8 and the heat-resistant material 11 and extends into the recess 4 is provided, and the powder gas a deposited in the recess 4 and the pair of guide rails 5 by the purge gas injected through the purge pipe. It is conceivable that the powder is blown away and discharged into the flow path 2. However, in this case, in order to reliably discharge the powder fluid a accumulated in the recess 4, it is necessary to dispose a large number of purge pipes, and the structure is It becomes complicated and the production cost is high.

In view of the above problems, the present invention provides a slide valve for a high temperature fluid, which has a simple structure and is capable of reliably discharging powdered fluid such as a chemical catalyst deposited or attached to a recess or a guide rail. The purpose is to do.

[0007]

In order to achieve the above object, the invention according to claim 1 is provided with a valve seat in a substantially central portion of a flow path for circulating a high temperature fluid containing powdered fluid in a valve box,
A recess is formed laterally downstream of the valve seat in the valve box,
In a high temperature slide valve in which a valve body for opening and closing the flow path is slidably arranged on a guide rail extending from the inside of the recess to the downstream end surface of the valve seat, the recess is formed by penetrating the valve box. It is characterized in that a scraper for pushing out the powder fluid accumulated in the concave portion into the flow path is fixed to the tip end portion of the operating rod movably inserted therein.

In the above structure, by pushing the operating rod into the recess, the scraper fixed to the tip of the operating rod can be pushed out and the powdery fluid accumulated in the recess can be discharged into the channel.

In this case, the powder fluid accumulated in the recess over a wide range can be discharged by the scraper simply by sticking out the operating rod, and the structure is simple and the manufacturing cost can be reduced.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, a purge gas injection port for injecting a purge gas toward the guide rail is formed in the scraper.

In the above structure, the powder fluid adhering to each guide rail can be blown off by only injecting the purge gas from the purge gas injection port in a state where the scraper is pushed out and the purge gas injection port is brought close to the guide rail.

In this case, the scraper can be pushed out to discharge the powder fluid accumulated in the recess, and at the same time, the purge gas can be sprayed from the purge gas injection port to blow away the powder fluid adhering to the guide rail, and the scraper can be used. Since the purge gas injection port is formed, the structure is simple and the manufacturing cost can be reduced.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a high temperature slide valve according to an embodiment of the present invention, in which through holes are formed on both sides of a bearing portion 9 in parallel with the bearing portion 9 and through the end plate 8 and the heat resistant material 11. A pair of support cylinders 15 are inserted and fixed, a pipe-shaped operation rod 16 is movably inserted into each of the support pipes 15, a scraper 17 is fixed to a tip end portion of each operation rod 16, and a purge gas is jetted to each scraper 17. A mouth 18 is formed. Since the configuration other than the above is substantially the same as the conventional example shown in FIG. 3, the same portions are denoted by the same reference numerals and description thereof will be omitted.

Each of the scrapers 17 has a rectangular plate shape and is disposed on both sides of the slide rod 10 in the recess 4 with the slide rod 10 interposed therebetween. The operation rods 16 are removed from the states shown by the solid lines in FIGS. 1 and 2. By pushing out manually, each scraper 17 can be pushed out and the powder fluid a accumulated in the recess 4 can be discharged into the flow path 2 as shown by the phantom line in the figure.

In this case, simply pushing out the operating rod 16
The scraper 17 allows the powder fluid a accumulated in the recess 4 to be discharged over a wide range, and the structure is simple and the manufacturing cost can be reduced.

Each of the operating rods 16 is arranged substantially concentrically with each of the guide rails 5, and the purge gas injection port 18 communicating with the tip end of each of the operating rods 16 faces the end face of each of the guide rails 5. The inside of each of the operating rods 16 serves as a flow path for the purge gas, and the base end portion of each of the operating rods 16 and the valve box 1
Inside is a pipe 19 with an on-off valve 19a and a flexible pipe 2
It is communicated through 0. In addition, 20 is a sealing material.

In the above structure, the scraper 17 is pushed out from the state shown by the solid lines in FIGS. 1 and 2, and each purge gas injection port 18 is brought close to the end face of each guide rail 5 (see the phantom line in the figure). By opening the valve 19a, each purge gas injection port 18 can be connected to each guide rail 5
It is possible to inject the purge gas toward and to blow away the powder fluid a adhering to each guide rail 5.

In this case, since the scraper 17 is used to form the purge gas injection port 18, the structure is simple and the manufacturing cost can be reduced.

[0019]

According to the first aspect of the present invention, the powder fluid accumulated in the concave portion over a wide range can be discharged by the scraper only by protruding the operating rod, the structure is simple, and the manufacturing cost is reduced. be able to.

According to the second aspect of the present invention, the scraper can be pushed out to discharge the powder fluid accumulated in the recess, and at the same time, the purge gas can be jetted from the purge gas injection port to blow away the powder fluid attached to the guide rail. You can
Moreover, since the purge gas injection port is formed by using the scraper, the structure is simple and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a high temperature slide valve according to an embodiment of the present invention.

FIG. 2 is a transverse sectional view of the same.

FIG. 3 is a longitudinal sectional view of a conventional example.

[Explanation of symbols]

 1 valve box 2 flow path 3 valve seat 4 recess 5 guide rail 6 valve body 16 operating rod 17 scraper 18 purge gas injection port a powdered fluid

Claims (2)

[Claims] 1. A valve seat is provided in a substantially central portion of a flow path for circulating a high temperature fluid containing a powdered fluid in a valve box, and a recess is formed in a side of the valve box downstream of the valve seat. In a high temperature slide valve in which a valve body for opening and closing the flow path is slidably arranged on a guide rail extending from the inside of the recess to the downstream end surface of the valve seat, the recess is formed by penetrating the valve box. A high temperature slide valve, characterized in that a scraper for pushing out the powder fluid accumulated in the recess into the flow channel is fixed to the tip of the operating rod movably inserted therein. 2. The high temperature slide valve according to claim 1, wherein the scraper is formed with a purge gas injection port for injecting a purge gas toward the guide rail.