JPH07158748A - Bulkhead piercing metal piece - Google Patents

Abstract

PURPOSE:To provide a bulkhead piercing metal piece which allows keeping airtightness even when an intermediate shaft penetrating the bulkhead stops rotating. CONSTITUTION:A housing 9 is airtightly installed at an airtight bulkhead 1 which partitions the given space into two rooms, and an intermediate shaft 6 is inserted through a hole 9a in the housing, and the gap between this shaft and the housing is sealed with a sealing member 7, whereto a lubricant is fed. A gas tube 10 is provided in a void 9d in housing 9 adjacent to the sealing member 7, and a gap is reserved between the inner surface 10a of this tube and the intermediate shaft 6. When a compressed gas is injected into the gas tube 11, it inflates and the gap to the intermediate shaft is sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partition wall penetrating metal piece that passes in a liquid-tight or gas-tight (hereinafter referred to as "air-tight") partition wall part which separates a room by an intermediate shaft for driving a cargo handling pump of a tanker ship. .

[0002]

2. Description of the Related Art A cargo handling pump room in a tanker or the like must be surrounded by a liquid-tight partition wall with a cargo tank and by an air-tight partition wall with an engine room in accordance with the Ship Safety Law and each classification regulation. When the shaft penetrates the airtight partition or the liquidtight partition, a flexible joint must be provided between the pump and the prime mover, and a penetrating metal object of an airtight structure must be provided at the place where the shaft penetrates the partition. Has become. The reason is that if the toxic or flammable cargo liquid leaks from the shaft seal of the cargo handling pump or the valve seal of the pump room, it evaporates in the pump room, and the vaporized gas passes through the penetrating object and is adjacent to it. When you enter the engine room,
This is because it may cause an unexpected accident.

A partition wall penetrating metal piece used for a conventional airtight partition wall has a structure as shown in FIG. In the figure, reference numeral 1 denotes a partition wall which airtightly separates the left pump chamber 2 and the right engine chamber 3. The partition wall 1 is provided with a hole 1a.
The flange 4a of the housing 4 is attached in an airtight manner with bolts and nuts (not shown) sandwiching the doubling 5. The housing 4 has a through hole 4b at the center, and an intermediate shaft 6 for driving the cargo handling pump penetrates through the through hole 4b. A sealing member 7 such as a gland packing or an oil seal is inserted between the intermediate shaft 6 and the space 4c of the housing 4. In order to ensure airtightness with the intermediate shaft 6, a lubricant injection port Inject oil or grease from 8. The oil or grease injected in this way becomes soft due to sliding heat when the intermediate shaft 6 rotates, and closes a small gap to improve airtightness. At the same time, it also serves for lubrication between the sealing member 7 and the intermediate shaft 6 and for cooling.

The above lubricant such as oil or grease is supplied only when the intermediate shaft 6 is rotating, and when the intermediate shaft 6 is stopped, the supply is stopped to prevent runoff. ing. Therefore, the airtightness is slightly reduced during the stop. Therefore, if the gas has a strong diffusivity, there is a possibility that the intermediate shaft 6 may pass through the partition penetrating metal object while the intermediate shaft 6 is stopped.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems and is capable of maintaining airtightness even when the intermediate shaft penetrating the partition wall stops rotating. Is intended to provide.

[0006]

To achieve the above object, the present invention provides a through hole in an airtight partition which separates two chambers, a housing is airtightly attached to the hole, and an intermediate shaft is inserted into the hole of the housing. In a partition wall penetrating metal member that penetrates through the intermediate shaft and the housing is sealed with a sealing member, and a lubricant injection port for supplying a lubricant to the sealing member is provided. A tube is provided, and a gas supply port for injecting a compressed gas is formed in the gas tube, and the gas tube expands due to the filling of the compressed gas so that the gas tube and the intermediate shaft and the gas tube and the housing are airtight It is characterized by a structure of sealing in.

Further, the gas tube may be provided in a cavity formed in the housing, the gas tube may be hermetically coupled to an inner wall of the cavity, or the gas tube may be When not filled with gas, a gap may be formed between the inner surface of the gas tube and the outer diameter of the intermediate shaft.

[0008]

[Operation] When the intermediate shaft passing through the partition is rotating,
A lubricant such as oil or grease is injected from the lubricant injection port as before to ensure airtightness.When the intermediate shaft is stopped, supply of the lubricant is stopped and compressed gas is supplied into the gas tube. To expand and secure the airtightness between the intermediate shaft and the gas tube and between the intermediate shaft and the housing.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the structure of the penetrating metal article of the present invention. Since many parts are common to the conventional example of FIG. 3, differences will be mainly described.

Like the conventional housing 4, the housing 9 has a doubling 5 between the flange portion 9a and the partition wall 1.
It is attached to the partition wall 1 in an airtight manner by sandwiching. Housing 9
Has a through hole 9b formed therein, and a space 9c is formed facing the through hole 9b to accommodate the sealing member 7.
Further, a space 9d is formed adjacent to the space 9c, and the gas tube 10, which is a feature of the present invention, is accommodated therein. The gas tube 10 is made of rubber or resin having an annular shape, and has a C-shaped cross section with an open outside. Also,
The inner surface 10a facing the intermediate shaft 6 is a cylindrical surface, and the outer open portion is closed by a reinforcing ring 11 formed of a rigid material such as metal or hard plastic.

A gas supply cap 12 for injecting a compressed gas into a gas tube 10 is provided in a space 9d of the housing 9.
Is screwed, and a pipe and a valve (not shown) are connected to the hole 12a of the base 12 and connected to an inert high-pressure gas source. A packing 13 is for keeping airtightness between the gas supply cap 12 and the reinforcing ring 11. In the gas tube 10 shown in FIG. 1, a gap is formed between the inner surface 10 a and the shaft 6 when the compressed gas is not supplied.

When a cargo handling pump (not shown) is operated, the intermediate shaft 6 rotates. At this time, the lubricant is supplied to the sealing member 7 by the oil supply means 14 such as a pressure type grease cup or a dripping type oiler, and the airtightness between the intermediate shaft 6 and the sealing member 7 is secured as described above. .

When the cargo handling pump is stopped and the rotation of the intermediate shaft 6 is stopped, the supply of the lubricant is stopped to stop the gas supply port 12a.
Compressed air or an inert gas is supplied into the gas tube 10 from. The gas tube 10 has a housing 9 on the outside.
Since it is surrounded by a high-rigidity material such as the wall and the reinforcing ring 11, it cannot expand in the direction of increasing the outer diameter, and expands in the axial direction (left and right directions in the figure) and the inner surface 1
It deforms in the direction in which the diameter of 0a decreases.

FIG. 2 is a view showing a state where the gas tube 10 is inflated. As shown in the drawing, the gas tube 10 is airtightly adhered to the left and right inner walls of the space 9d, and the inner surface 10a is in contact with the outside of the intermediate shaft 10, A tight seal can be secured while the intermediate shaft 6 is stopped. Before operating the cargo handling pump again, the air or gas in the gas tube 10 may be evacuated before that operation.

In order to obtain airtightness between the gas tube 10 and the space 9d, the gas tube may be adhered to the inner wall of the space 9d with an adhesive or the like.

According to the present invention, electric signals for operating and stopping the cargo handling pump are received, and the cargo handling pump automatically supplies the lubricant from the lubricant inlet 8 while the cargo handling pump is in operation. When stopped, the supply can be automatically stopped.

Similarly, when the cargo handling pump is in operation, the supply of compressed gas or the like from the gas supply port 12a is automatically stopped to release the gas in the gas tube 10, and when the cargo handling pump is stopped, it is automatically stopped. It becomes possible to fill the gas in the gas tube 10 with gas and to seal it.

Various modifications can be considered for the above-described embodiment. For example, the reinforcing ring 11 may be omitted, and the wall of the housing 9 may be configured to directly suppress the expansion of the gas tube 10 to the outside. Further, the cross-sectional shape of the gas tube 10 may be a round shape instead of the C shape. In addition, the gas tube 10 is not housed in the space 9d of the housing 9, but is adhered to the outside of the housing in an airtight state, and when gas is injected, the gas tube swells to hermetically seal the intermediate shaft. You can also do it.

[0019]

As described above, according to the present invention,
With a very simple structure, it is possible to secure a high degree of airtightness of the metal material penetrating the partition even when the intermediate shaft penetrating the partition is stopped. Moreover, since the structure is simple, opening and assembling for maintenance and inspection are easy, and maintenance is also easy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the structure of a partition wall through metal article of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a compressed gas is filled in a gas tube in the partition penetrating metal article of FIG.

FIG. 3 is a cross-sectional view showing the structure of a conventional partition wall penetrating metal article.

[Explanation of symbols]

 1 Partition 2 Pump Room 3 Engine Room 6 Intermediate Shaft 7 Sealing Member 8 Lubricant Injection Port 9 Housing 9b Through Hole 9d Void 10 Gas Tube 11 Reinforcement Ring 12a Gas Supply Port

Claims (4)

[Claims] 1. A through hole (1a) is opened in an airtight partition (1) separating two chambers, a housing (9) is airtightly attached to the hole, and a through hole (9b) is formed in the housing to form the through hole. A lubricant injection port (8) for penetrating the intermediate shaft (6), sealing the space between the intermediate shaft and the housing with a sealing member (7), and supplying a lubricant to the sealing member. In the partition penetrating metal piece, a gas tube (10) is provided adjacent to the housing, and a gas supply port (12a) for injecting a compressed gas is formed in the gas tube, and the gas tube is expanded by filling the compressed gas. A partition wall penetrating metal article, characterized in that the gas tube and the intermediate shaft (6) and the gas tube and the housing (9) are hermetically sealed. 2. The partition penetrating metal article according to claim 1, wherein the gas tube (10) is provided in an empty space (9d) formed in the housing. 3. The partition penetrating metal article according to claim 2, wherein the gas tube (10) is airtightly coupled to the inner wall of the void (9d). 4. The inner surface (10a) of the gas tube (10a) when the gas tube (10) is not filled with gas.
A partition penetrating metal article according to claim 1, wherein a gap is formed between the outer diameter of the intermediate shaft and the outer diameter of the intermediate shaft.