CN108019515B - A split-half packing gland - Google Patents

Abstract

A split-half packing gland includes an upper half body and a lower half body. The flange plate joint surface of the line is combined with the intermediate pressure ring joint surface passing through the axis line, and there is a gap on both sides of the intermediate pressure ring joint surface. The two halves each have two bolt holes, one bolt hole is provided with a shallow convex stop, and the size of the other bolt hole is set to the corresponding concave stop. The invention can make the middle split surfaces of the two halves of the prior art Chinese patent ZL2010202612870 "split-and-half packing gland for pump" closely fit, and the two halves can be very closely connected.

Description

A split-half packing gland

technical field

The invention belongs to the technical field of machinery, and relates to a packing gland, especially a packing gland which can be disassembled in half in the middle of a rotating shaft.

Background technique

The packing gland is an important part used for axial sealing between the fluid machinery shaft such as water pump or valve and the casing, and its function is mainly to compress the packing. Chinese patent ZL2010202612870 "split packing gland for pump", which better solves the problem that the original integral gland cannot be disassembled from the middle of the main shaft, which causes the increase of axial length and the original split packing that is tightly tightened by bolts. It is a problem that the gland is troublesome to assemble and disassemble. However, in this patent, there must be rounding or chamfering at the right angles on both sides of the middle split surface of the two halves, so the two split surfaces cannot be closely fitted during assembly. In addition, since the two halves of the patent are only connected by bolts passing through the screw holes, and there is a large gap between the bolts and the screw holes, the connection between the two halves is very loose.

SUMMARY OF THE INVENTION

The present invention aims to provide a split-half packing gland, which solves the problems of the above-mentioned prior art that the split surfaces cannot be closely fitted together and the loose connection of the split-half bodies.

The technical scheme adopted by the present invention to solve its technical problems is:

A split-half packing gland, including an upper half body and a lower half body, the two half bodies have the same structure, and each of the two half bodies has two bolt holes. The flange plate joint surface of the line is combined with the intermediate pressure ring joint surface passing through the axis line, and there is a gap on both sides of the intermediate pressure ring joint surface.

Each of the two halves has two bolt holes, one bolt hole is provided with a shallow convex stop, and the other bolt hole is set to the size of the corresponding concave stop.

Beneficial effects of the present invention: Since there is a gap on both sides of the joint surface of the intermediate pressure ring, the middle split surfaces of the two half-body bodies similar to the Chinese patent ZL2010202612870 "half-type packing gland for pumps" can be closely attached ; Since a shallow convex stop is set at one bolt hole, and a concave stop is set at the other bolt hole, the two halves can be very tightly connected through the stop when they are combined.

Description of drawings

Figure 1 is a schematic diagram of the assembly structure of ZL2010202612870 "Half-type packing gland for pump".

Figure 2 is a schematic diagram of the half-body structure of ZL2010202612870 "Half-type packing gland for pump".

Fig. 3 is a schematic diagram of the assembly structure of a split-half packing gland of the present invention.

Fig. 4 is a schematic diagram of a half body of a split-half packing gland according to the present invention.

In the picture: 1. Upper half body, 2. Lower half body, 3. Flange plate joint surface, 4. Middle pressure ring joint surface, 5. Notch, 6. Convex stop, 7. Set to corresponding concave stop size of the bolt holes.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 4, the split-half packing gland includes an upper half body 1 and a lower half body 2. The two half bodies have the same structure, and the two half bodies pass through the flange plate perpendicular to the axis line. The joint surface 3 is combined with the joint surface 4 of the intermediate pressure ring passing through the axis line, and there is a gap 5 on both sides of the joint surface 4 of the intermediate pressure ring. Each of the two halves has two bolt holes, one bolt hole is provided with a shallow convex stop 6 , and the size of the other bolt hole is set to the corresponding concave stop size 7 .

When combined, the gaps 5 of the two halves can make the two ends of the joint surface 4 of the intermediate pressure ring not have any chamfers or roundings left in the production process, so that they can be completely and tightly fitted. A shallow convex stop 6 is set at one of the connecting bolt holes in the half body, and the size of the other connecting bolt hole is set to the corresponding concave stop size 7 . When assembling, rotate one of the two halves by 180 degrees, and the two halves are formed into a whole through the combination of the convex and concave two mouths.

Claims (1)

1. The utility model provides a divide half formula gland, includes and divides the halfbody and divide the halfbody down on the last, and the structure of two halves is the same, and two halves respectively have two bolt holes, and these two halves of dividing combine its characterized in that through the flange board faying surface of perpendicular to axial lead and the middle clamping ring faying surface through the axial lead: two sides of the middle pressing ring joint surface are respectively provided with a notch, and the notches of the two half bodies ensure that the two ends of the middle pressing ring joint surface are not provided with chamfers or roundings left when being manufactured, so that the two half bodies can be completely and tightly attached; when the split half bodies are assembled, one of the split half bodies is rotated by 180 degrees, the two split half bodies form a whole through the matching of the convex and concave rabbets, and the split half bodies can be separated only by withdrawing the rabbets when the split half bodies are disassembled.

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