JPH08100797A - Protection cover for pump casing penetrating potary shaft - Google Patents

Abstract

PURPOSE: To carry out tightening work safely during operation by providing a pair of half cylinders with a flange surrounding the circumferece of rotary shaft on the outer side of a gland presser. CONSTITUTION: A boss 1 is provided to from the seal part of the rotary shaft penetrating part of a pump casing, and also a gland packing 3 which is inserted and packed from an outside is provided on an annulus ring shaped space to be formed between outer circumferences of a rotary shaft 6, and the outer end surface of the packed gland packing 3 is push-pressed on the cylindrical end surface of a gland pressure foot 4. At this time, as a protection cover, a push bolt 5 is penetrated in bolt inserting holes of a half flange part 11a, 12a, and the gland pressure foot 4, and screwed down in the screw hole 1a of the boss 1, and the gland packing 3 is push-pressed and compressed by the gland pressure foot 4 through the half flanges 12a, 12b so as to improve sealing property. It is thus possible to carry out tightening work safely without stopping operation, and also it is possible to prevent leakage from the seal part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary shaft protective cover for protecting an operator from a rotary shaft which is exposed and rotated when a gland of a seal portion of a rotary shaft which penetrates a pump casing is retightened. It is about.

[0002]

2. Description of the Related Art At a place where a rotary shaft of a pump penetrates a casing, a space for accommodating a gland packing is provided at the penetrating position, the gland packing is packed in this space, and the gland packing is pressed from the outside by a gland presser. , It prevents the fluid from leaking to the outside. The gland packing wears out during use and cannot be sealed. In such a case, the gland packing is pressed by the gland presser by screwing the presser bolt to increase the packing density of the gland packing and to perform the "re-tightening" work to enhance the sealing property.

[0003]

[Problems to be Solved by the Invention]
As shown in FIG. 3, since the head of the presser bolt 5 of the gland presser 4 is exposed and is close to the rotating shaft 6, the worker's hand or body comes into contact with the rotating shaft 6 at high speed. , There is a risk of injury. For this reason, when performing "re-tightening" work, turn off the power, stop the pump, re-tighten,
It was necessary to perform a series of so-called condition setting work of confirming that there was no liquid leakage by turning on the power and performing a trial run. This work requires a long time of 60 to 90 minutes,
Therefore, productivity may be reduced in some cases. In addition, in some cases, the necessary number of times of retightening is omitted, and there is a problem that liquid leakage increases and the peripheral equipment is contaminated or corroded.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems by rotating a pump casing through which a rotary shaft of the pump casing penetrates and is provided adjacent to an outside of a flange of a gland presser provided outside the boss. A shaft protection cover comprising two half-cylinders with flanges, the half-cylinders being arranged so as to surround the exposed part of the rotating shaft, and each of the flange of the gland press and the two half-cylinders with a flange This is solved by the protective cover of the rotary shaft that penetrates the pump casing, which is attached to the multiple screw holes provided on the boss end surface of the pump casing by the multiple bolts that pass through the multiple bolt insertion holes provided on the flange of the pump casing. To do.

[0005]

[Operation] Since two half-cylinders with a flange surrounding the rotating shaft are provided outside the gland presser, the hands and body of the worker performing the retightening work do not contact the rotating shaft, Re-tightening work can be safely performed (while the shaft is rotating).

Since it is possible to safely perform the additional tightening work even during operation, it is not necessary to omit the necessary number of times of the additional tightening work, and it is possible to prevent the liquid from leaking from the seal portion. Stain the surrounding equipment,
It will not corrode.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a seal portion to which a protective cover according to an embodiment of the present invention is attached, and FIG. 2 is a right side view of FIG. Reference numeral 1 denotes a boss that forms a seal portion of the rotary shaft penetrating portion of the pump casing, and 3 is a gland packing that is inserted into the annular space formed between the outer periphery of the boss 1 and the rotary shaft 6 from the outside and packed. . On the boss 1 of the casing, a plurality of screw holes 1a that open to the outer end surface are formed in concentric circles at equal intervals. The gland presser 4 is formed of a cylinder with a flange, and the flange has a plurality of holes through which bolts are inserted on the same diameter circle as the mounting circle of the screw hole 1a of the boss of the casing. Ground presser 4
The end surface of the cylinder is a portion that presses the outer end surface of the gland packing 3 packed in the annular space.

The protective cover used in the present invention comprises a flanged half-split cylinder portion 11 and a flanged half-split cylinder portion 12. The flanged half cylinder portion 11 includes a half flange portion 11a and a half cylinder portion 11b.
The half-flange portion 11a is provided with a plurality of bolt holes for inserting the holding bolt 5 on the same diameter circle as the mounting circle of the screw hole 1a of the casing boss portion. Further, the flanged half-divided cylinder portion 12 is composed of a half-divided flange portion 12a and a half-divided cylindrical portion 12b. A plurality of bolt holes for inserting the bolts 5 are formed. Protective cover (11 and 12)
However, the inner diameter formed in the state of being attached to the casing boss portion is 1.1 to 1.3 times the outer diameter of the rotating shaft 6, and its length is preferably 100 to 500 mm.

The protective cover is attached by inserting the holding bolt 5 into the bolt insertion holes of the half flange portion 11a and the half flange portion 12a and the gland presser 4, and screwing the press bolt 5 into the screw hole 1a of the boss 1. Done in. Further, by screwing the holding bolt 5, the gland packing 3 is pressed and compressed by the gland presser 4 via the half-split flanges 12a and 12b to improve the hermeticity.

As the protective cover, a stainless plate or a resin plate is used in consideration of corrosion resistance and durability depending on the liquid leaking from the seal portion.

When the protective cover of the present invention was attached and additional tightening was performed during operation, the conventional condition setting work became unnecessary, and the additional tightening work was completed in 10 to 15 minutes. In addition, since the additional tightening can be performed in a short time during operation, the additional tightening work can be performed at a fixed cycle, and the number and amount of liquid leaks from the seal part are reduced, and Fouling and deterioration are greatly reduced.
Although the above-described embodiment describes a pump that handles a liquid, it goes without saying that the invention is not limited to a pump that handles a liquid such as water and oil, and can be applied to other devices having a similar structure.

[0012]

Since the protective cover of the present invention is attached to the outside of the gland press so as to surround the rotating shaft, the tightening work can be safely performed without stopping the operation. Further, the time required for the additional tightening is reduced, and the additional tightening can be performed in a predetermined cycle, so that the stain and deterioration of the peripheral equipment can be significantly reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a seal portion to which a protective cover according to an embodiment of the present invention is attached.

FIG. 2 is a right side view of FIG.

FIG. 3 is an explanatory view of a conventional seal portion without a protective cover.

[Explanation of symbols]

 1 Boss 3 Gland packing 4 Gland presser 5 Presser bolt 11, 12 Protective cover 11a, 12a Half flange part 11b, 12b Half cylinder part

Claims (1)

[Claims] 1. A pump casing penetrating rotary shaft protective cover provided adjacent to an outer side of a flange of a gland presser provided outside a boss through which a rotary shaft of the pump casing penetrates, the half cylinder having two flanges. A plurality of half-cylindrical cylinders are arranged so as to surround the exposed portion of the rotary shaft, and a plurality of bolt-penetrating holes are provided in the flange of the gland retainer and the flanges of the two half-cylinders with two flanges. A protective cover for the rotary shaft passing through the pump casing, which is attached to a plurality of screw holes provided on the boss end surface of the pump casing by the bolts and presses the gland retainer.