Pump body sealing ring structure suitable for sand-containing water medium

Abstract

The utility model relates to a pump body sealing ring structure suitable for a sand-containing water medium, which comprises a sealing ring and a pump body and is characterized in that boss ring edges are arranged on two sides of the sealing ring, two O-shaped ring grooves are arranged on the circumferential surface of the sealing ring, each O-shaped ring groove is tightly attached to the side of the corresponding boss ring edge, and a pin counter bore is arranged on the circumferential surface of the bottom of the sealing ring. The sealing ring has the advantages that due to the fact that the whole ring design is adopted, two end faces are formed to be matched, equivalently, a labyrinth is formed, and large pressure drop is formed when sand-containing water enters the sealing ring. And the O-shaped ring and the flushed part of the pump body are staggered, so that the gap flushed firstly cannot be diffused to the O-shaped ring to damage the O-shaped ring. Therefore, the first labyrinth prevents the O-shaped ring from being directly scoured by sand-containing water. And the O-shaped ring is intact, so that high-pressure water can be prevented from continuously entering a matching gap. Practice proves that the structure has a remarkable effect on prolonging the service life of the sealing ring of the pump body.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal pumps, in particular to a pump body sealing ring structure suitable for sand-containing water media. Background Art

[0002] Centrifugal pumps have been widely used in the Yellow River Basin, but there are still problems such as low service life of vulnerable parts, fast wear of sealing rings, and low service life. There are still cases where the three-way mouth of the pump body where the sealing ring is installed is washed out by muddy water and quickly spreads and damages. This situation requires timely repair welding of the pump body, which is time-consuming and labor-intensive, and has always troubled the vast number of pump station managers and maintenance personnel. The current sealing ring structure is mostly the sealing ring structure and installation form used on conventional double-suction pumps (see Figure 1 , Figure 2 ). This sealing ring 20 is annular, and a boss 21 is provided in the lower half of the circle. The boss is inserted into the groove of the pump body and is used to position the sealing ring. O-ring grooves 22 are provided on both sides of the sealing ring to install O-rings to prevent the high-pressure water in the water pressure chamber of the pump body 23 from flowing into the water suction chamber. This structure is completely applicable to clean water, but it is not reliable enough for the silt water of the Yellow River, because the high-speed flowing sand-containing water flow wears the substrate very quickly, even for cast steel and ductile iron materials. The existing structure is a linear fit between the pump cover 24 and the sealing ring. Due to the existence of a gap, a gap is easily eroded between the pump body and the sealing ring. When the gap spreads to the O-ring, the O-ring is quickly damaged, which leads to the erosion and damage of the sealing ring and the pump body three-way mouth 25 in a short time. If it is not discovered in time, the pump body will be scrapped, resulting in the water pump being unusable. Summary of the invention

[0003] The purpose of the utility model is to invent a new alternative solution to solve the problem of the sealing ring and pump body being damaged by the Yellow River water in the prior art and having a short service life. A new pump body sealing ring structure is provided, which can improve the service life of the sealing ring and the pump body under the premise of convenient operation and reliable structure.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a new type of sealing ring structure, including a sealing ring, a pump body, and a pump cover, characterized in that there are boss ring edges on both sides of the sealing ring, two O-ring grooves are arranged on the circumferential surface of the sealing ring, each O-ring groove is close to the boss ring edge, and a pin countersunk hole is arranged on the bottom circumferential surface of the sealing ring. An O-ring is placed in each O-ring groove. The lower parts of the two boss rings of the sealing ring are embedded in the mounting convex ring of the pump body, and a pump body pin hole is arranged on the pump body mounting convex ring. A cylindrical pin is installed in the pump body pin hole, and the upper part of the cylindrical pin is embedded in the pin countersunk hole on the bottom circumferential surface of the sealing ring, and the upper parts of the two boss rings of the sealing ring are embedded in the mounting convex ring of the pump cover.

[0005] The advantage of the utility model is that it is a whole-circle design, forming two end faces to match, which is equivalent to forming a maze. When sand-containing water enters the sealing ring, a large pressure drop is formed. In addition, the O-ring and the flushed part of the pump body are staggered, and the first gap flushed will not spread to the O-ring and damage the O-ring. Therefore, the first maze prevents the O-ring from being directly flushed by sand-containing water. The integrity of the O-ring can prevent high-pressure water from continuously entering the matching gap. Practice has proved that this structure has a significant effect on increasing the service life of the pump body sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a structural schematic diagram of the prior art.

[0007] Figure 2 It is a schematic diagram of the sealing ring structure of the prior art.

[0008] Figure 3 for Figure 2 AA cross-section diagram of .

[0009] Figure 4 It is a schematic diagram of the cross-sectional structure of the sealing ring of the utility model.

[0010] Figure 5 It is a partial schematic diagram of the installation of the sealing ring and the pump body of the utility model.

[0011] Figure 6 It is a partial schematic diagram of the installation of the sealing ring and pump cover of the utility model. DETAILED DESCRIPTION

[0012] The present invention is described in detail below in conjunction with the specific implementation and drawings.

[0013] A new type of sealing ring structure shown in the figure includes a sealing ring 1, a pump body 2, and a pump cover 3, characterized in that there are boss ring edges 4 on both sides of the sealing ring, two O-ring grooves 5 are arranged on the circumferential surface of the sealing ring, each O-ring groove is close to the boss ring edge, and a pin countersunk hole 6 is arranged on the bottom circumferential surface of the sealing ring. An O-ring 7 is placed in each O-ring groove. The lower parts of the two boss rings of the sealing ring are embedded in the mounting convex ring 8 of the pump body, and a pump body pin hole 9 is arranged on the pump body mounting convex ring. A cylindrical pin 10 is installed in the pump body pin hole 9, and the upper part of the cylindrical pin is embedded in the pin countersunk hole 6 on the bottom circumferential surface of the sealing ring, and the upper parts of the two boss rings of the sealing ring are embedded in the mounting convex ring 11 of the pump cover.

[0014] This utility model structure see Figure 3As shown, the pump body sealing ring is an annular structure, with two circles of bosses designed on both sides of the sealing ring, and a groove is formed inside the two circles of bosses. The grooves cooperate with the pump cover and the pump body to form two end face stops 12 after installation. A pin countersink is opened in the middle of the groove. The pin countersink is a blind hole, and its size is slightly larger than the cylindrical pin. Two O-ring grooves are opened on the sides of the bosses. A pin hole is opened on the pump body, and the size of the hole is consistent with the outer diameter of the cylindrical pin. During installation, first install the O-ring in the O-ring groove of the sealing ring, insert the cylindrical pin on the pump body, align the pin hole of the pump body sealing ring with the cylindrical pin, and then clamp the sealing ring on the pump body, and finally cover the pump cover to press the sealing ring.

[0015] The middle groove formed by the bosses on both sides of the pump body sealing ring is embedded in the pump body. Due to the full circle design, two end faces are matched, which is equivalent to forming a maze. When sand-containing water enters the sealing ring, a large pressure drop is generated. In addition, the O-ring and the flushed part of the pump body are staggered, and the gap flushed first will not spread to the O-ring and damage the O-ring. Therefore, the first maze prevents the O-ring from being directly flushed by sand-containing water. The integrity of the O-ring can prevent high-pressure water from continuously entering the matching gap. Practice has proved that this structure has a significant effect on improving the service life of the pump body sealing ring.

Claims

1. A new type of sealing ring structure, including a sealing ring, a pump body, and a pump cover, characterized in that: There are boss ring edges on both sides of the sealing ring, two O-ring grooves are arranged on the circumferential surface of the sealing ring, each O-ring groove is close to the boss ring edge, and a pin countersunk hole is arranged on the circumferential surface of the bottom of the sealing ring.

2. A new type of sealing ring structure according to claim 1, characterized in that: An O-ring is placed in each O-ring groove.

3. A new type of sealing ring structure according to claim 1, characterized in that: The lower parts of the two boss rings of the sealing ring are embedded in the mounting convex ring of the pump body. A pump body pin hole is provided on the pump body mounting convex ring. A cylindrical pin is installed in the pump body pin hole. The upper part of the cylindrical pin is embedded in the pin countersunk hole on the circumferential surface of the bottom of the sealing ring. The upper parts of the two boss rings of the sealing ring are embedded in the mounting convex ring of the pump cover.

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