# US 4,393,703 A · Sealing assembly for furnace probe bore

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- Number: US 4,393,703 A
- Document ID: US4393703A
- Status: Granted
- Kind: A
- Application number: 06/213,917
- Filed: 1980-12-08
- Granted: 1983-07-19
- Earliest claimed: 1979-12-15
- Assignees: Dango & Dienenthal Maschinenbau GmbH
- Inventors: Werner Schneider
- Web page: https://patentgrep.com/patent/US4393703A

## CPC

- C21B 7/24: Test rods or other checking devices
- C21B: MANUFACTURE OF IRON OR STEEL (preliminary treatment of ferrous ores or scrap C22B1/00)

## Abstract

The bore in the shaft wall of a blast furnace through which a furnace probe is inserted is formed with a valve mechanism for shutting the probe bore when the probe is removed and with a sealing assembly located outwardly of the valve mechanism to prevent outburst of heat from the furnace while the probe is removed. A hose seal which bears against the blast furnace probe is connected to the sealing assembly on the side thereof opposite the valve mechanism.

## Claims

### Claim 1

An attachment for a bore in the shaft wall of a blast furnace through which a blast furnace probe is received comprising, stop valve means, a sealing assembly, and a hose seal including an annular flexible element for slidably engaging said probe which bears against said blast furnace probe and which is connected to said sealing assembly.

### Claim 2 (depends on 1)

An attachment according to claim 1 wherein said hose seal is arranged in a housing connected to said sealing assembly.

### Claim 3 (depends on 1, 2)

An attachment according to claim 1 or 2 wherein a connecting line for the admission of a working medium is provided for said hose seal.

### Claim 4 (depends on 1)

An attachment according to claim 1 wherein said hose seal has an inner circumference which is provided with a nonabrasive lining.

### Claim 5 (depends on 1)

An attachment according to claim 1 wherein said hose seal has a front opposite to said sealing assembly which is provided with a grease chamber.

### Claim 6 (depends on 1)

An attachment according to claim 1 wherein sealing rings are arranged on opposite sides of said stop valve means taken axially of said bore.

### Claim 7 (depends on 6)

An attachment according to claim 6 wherein said sealing rings on one side of said valve means bear against said valve means with a given pressure.

### Claim 8 (depends on 6, 7)

An attachment according to claims 6 or 7 wherein said stop valve means is radially moveable.

### Claim 9 (depends on 1)

An attachment according to claim 1 wherein said stop valve means includes a stop valve member and an annular piston arranged within said stop valve means on a side of said stop valve member nearest said furnace, with sealing rings being provided on a head of said annular piston between said annular piston and said stop valve member.

### Claim 10

An attachment for a bore in a shaft wall of a blast furnace through which an elongate blast furnace probe is operatively received by longitudinal movement of said probe through said attachment and bore into and out of said furnace, said attachment comprising, in combination, stop valve means for effecting a fluid seal when said probe is moved through said attachment, a hose seal comprising a toroidal hose member surrounding said probe and including an inner circumference pressed in direct contact against said probe during movement of said probe inwardly and outwardly of said furnace, said hose seal including fluid pressure means for applying a fluid pressure urging said hose member into sealing contact against said probe and an additional sealing assembly arranged adjacent said hose seal longitudinally of said probe for providing an additional sealing function between the outer surface of said probe and said attachment.

### Claim 11

An attachment for a bore in the shaft wall of a blast furnace through which a blast furnace probe is received comprising, stop valve means, a sealing assembly, and a hose seal which bears against said blast furnace probe and which is connected to said sealing assembly wherein said stop valve means includes a stop valve member and an annular piston arranged within said stop valve means on a side of said stop valve member nearest said furnace, with sealing rings being provided on a head of said annular piston between said annular piston and said stop valve member and wherein annular chambers leading to lubricant bores are provided between said sealing rings for said stop valve member.