JPS59226298A - Liner of pump casing - Google Patents

Abstract

PURPOSE:To elongate the life of the pump casing by a method wherein the liner main body is provided on the innr peripheral surface of the pump casing in parallel therewith while a bolt, plated into the liner main body, is penetrated through and projected from the pump casing and the bolt is tightened by a nut through a packing. CONSTITUTION:The liner main body 1 is formed by a wear resistant material and the bolt 2 is cast together with the liner main body 1 so as to be planted thereinto. The liner is arranged in parallel with the inner peripheral surface of the pump casing, therefore, one side surface of the liner main body 1 is configured so as to be coinciding with the inner peripheral surface of the casing. The bolt 2 is inserted into the rubber packing 4A and is inserted into the hole of the casing 3, thereafter, is inserted into an O-ring 4B and a washer 5, then, the liner main body 1 is clamped to the casing 3 by the nut 6. Accoding to this method, the casing main body may be used continuously by exchanging the liner main body 1 in case the casing 3 is worn.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liner lined on the inner circumferential surface of a casing of a pump such as a sand pump that undergoes severe wear.

The blades and casings of sand pumps and the like used for dredging are subject to severe wear, so they are generally made of wear-resistant materials. However, when it comes to the pump casing,
The entire pump casing does not wear uniformly;
Partially unusable. It is possible to extend the life of the casing to a certain extent by making the casing thicker in this area, but if the depth of uneven wear on the inner surface of the casing increases, the flow of water within the casing will be disturbed and the efficiency of the pump will be reduced. This will result in a decline.

An object of the present invention is to provide a pump casing that can be lined with a pump casing to extend the life of the pump casing, and that can be easily replaced in the case of wear and gradual loading into pump gauging in order to increase the usage yield of the casing. To provide lining liner.

The inner liner of the pump casing according to the present invention is made of a wear-resistant material, is fitted circumferentially on the heavily worn inner circumferential surface of the pump casing, and is cast in the wear-resistant material so as to extend in the radial direction of the pump. The bolt, which was set upright, penetrated the pump casing and came out! It protrudes from the pump casing and is tightened to the pump casing with a nut via a packing between the pump casing and the pump casing.

Hereinafter, the inner liner of the pump casing of the present invention will be explained in detail based on the drawings of the embodiments. Figures 1 and 2 (a)
2(b) is a side view of another embodiment, and FIG. 3 is a sectional view showing another embodiment installed in a pump casing.

The main body 1 of this steel is made of a wear-resistant material, such as high chromium fishing steel or high chromium cast iron, which has wear resistance equal to or higher than that of the material of the pump casing.

The main body 1 has a bolt 2 (generally made of mild steel) erected around the main body 1. Since these shears are fitted circumferentially in the inner circumferential direction of the bomb casing song, one side of the main body 1 (1 (11) on the right in Fig. 2 corresponds to the inner circumferential surface of the casing). The liner shown in Fig. 2(b) has a shape in which all the opening faces coincide with the inner circumferential surface of the casing.
For the liner a), the left and right sides ``(1'' and the bottom surface can be brought into close contact with the inner circumferential surface of the casing, but the slope connecting the bottom surface with 1111jlfo is not in close contact with the inner circumference σ7i of the casing. Even with this shape, the casing There is no problem with fitting it in, but rather this form allows for more reliable connection with the inner circumferential direction of the casing. The main bodies of the sheathers are shaped so that they are closely spaced 4' when fitted side by side in the circumferential direction.

The direction of the bolt 2, which is cast in the main body 1 and stands upright, is the third direction.
As shown in the figure, this liner is fitted into the casing 3 in a direction radially outward of the pump, more precisely perpendicularly outward to the arc of the casing at the central cut plane of the casing. This is the direction. Bolt 2.

The main body 1 is inserted through a hole provided in the casing 3 so as to protrude outward, and is lined up and fitted on the inner circumferential surface of the coo-thong 3.

My father, this Shiina, before inserting the bolt 2 into the hole of the casing 3, put a rubber gasket 4 on the bolt 2. Insert A-Q. After inserting into the hole of 0-casing 3,
Insert the Q ring 4B and the ring 5 into the bolt 2, and tighten the main body 1 to the casing 3 with the nut 6.

This liner is fitted onto the inner peripheral surface of the casing 3.

Although they are arranged in close layers, the holes in the casing 3 through which the bolts 2 are inserted are aligned with the bolts 2 in order to absorb dimensional errors.
It is larger than the diameter of. However, since a gasket is inserted between the casing 3, the main body 1, and the nut 6 (washer 5), the water inside the casing 3 will not leak to the outside.

Embodiment F of a casing for a sand pump for dredging lined with the liner of the present invention: It is shown in FIGS. 4 and 5. FIG. 4 is a sectional view perpendicular to the axis passing through the center of the coosong, and FIG. 5 is a sectional view taken along the line 2--v in FIG. In the drawing, 2 and 3A are discharge ports. Both the casing 3 and the housing body 1 are made of high chromium iron. On the inner peripheral surface of the casing 3, approximately at the circumferential portion away from the discharge port 3A, there is a U-shape extending outward. ^γ is formed, liners are lined up and fitted in this groove, and a curve (((j) is made to form a J shape. In this embodiment, liner In order to easily connect the main body 1 and the casing 3, a sheather having the shape shown in FIG. 2(a) is used.

Since the liner of the present invention is grooved and used as described above, when the heavily worn portion of the pump casing lined with the liner of the present invention wears out, the liner of the present invention is replaced and the inside of the casing 3 is replaced. Since the casing can be used continuously, the life of the casing is extended and it is time-saving. Furthermore, the liner of the present invention is easy to attach to the casing and easy to replace when worn, and is therefore extremely effective.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the pump casing lining live according to the present invention, FIG. 2(a) is a side view thereof, and FIG. Figure 3 is a cross-sectional view showing another embodiment installed in a pump pump/puffer; Figure 4 is a vertical cross-sectional view of the casing of a dredging pump lined with the liner of the present invention; Figure 5 is the fourth
It is a sectional view taken along the line v-v in the figure. 1...Liner body 2...Cast bolt 3°°
゛Bongkaizong 4A, 4B...Patsukin
5...Washer 6...Natsuto inventor Hirai
Akio Inventor Masahiro Hara Inventor Kubo 1) Yasuo Inventor Shigeru Aruki Applicant Kawasaki Heavy Industries, Ltd. Figure 1 Figure 2 (a) Figure 2 (b) Third collapse Figure 4 fi50

Claims (1)

[Claims] Bolts are made of wear-resistant material and are fitted circumferentially on the inner circumference of the pump casing, where wear is severe, and are cast in the wear-resistant material and erected in the radial direction of the pump. An inner liner for a pump casing, which protrudes outward through the casing and is tightened to the pump casing with a nut via a packing between the liner and the pump casing.