Welded pump barrel for horizontal multi-stage pump

Abstract

The utility model belongs to water pump technical field especially points out a kind of welding pump cylinder for horizontal multistage pump, including the hollow and both ends open cylinder and the water inlet body being arranged in the left end of cylinder, be equipped with water outlet pipe on the cylinder, be equipped with water inlet pipe on the water inlet body, the left end of cylinder is bent to form annular plate one inward, the water inlet body is fixed on annular plate one by welding.The utility model can freely lengthen the length of cylinder, when needing to lengthen pump cylinder length, only need to lengthen the length of cylinder, water inlet body does not change, need not to open mould again, and cost is low.

Description

Technical fields:

[0001] This utility model belongs to the field of water pump technology, and specifically refers to a welded pump barrel for a horizontal multistage pump. Background technology:

[0002] Horizontal multistage pumps belong to the category of drainage pumps. They adopt a segmental centrifugal pump structure with multistage impellers connected in series. They are mainly used in water supply and drainage systems in mines, factories, and cities. They can transport clean water without solid particles or liquids with physical and chemical properties similar to clean water.

[0003] Existing horizontal multistage pump casings, such as Figure 1 As shown, it includes a pump barrel body 1, with a water outlet pipe 2 fixedly connected to the top of the pump barrel body 1 by welding, and a water inlet pipe 3 fixedly connected to the left end of the pump barrel body 1 by welding. The pump barrel body 1 is usually formed by integral stamping.

[0004] The shortcomings of existing pump barrels for horizontal multistage pumps are: due to the limitations of stamping die forming, the length of the pump barrel body 1 cannot be designed to be very long, and when the length of the pump barrel body 1 needs to be increased, a new mold needs to be made, which is costly. Utility Model Content:

[0005] The purpose of this utility model is to provide a welded pump barrel for a horizontal multistage pump, which can freely extend the length of the barrel. When it is necessary to extend the length of the pump barrel, only the length of the barrel needs to be extended, while the water inlet remains unchanged. There is no need to re-open the mold, and the cost is low.

[0006] This utility model is implemented as follows:

[0007] A welded pump barrel for a horizontal multistage pump includes a hollow cylinder with openings at both ends and a water inlet body located at the left end of the cylinder. The cylinder is provided with a water outlet pipe, and the water inlet body is provided with a water inlet pipe. The left end of the cylinder is bent inward to form an annular plate, and the water inlet body is fixed to the annular plate by welding.

[0008] In the above-mentioned welded pump barrel for a horizontal multistage pump, the water inlet body includes an end plate, the outer periphery of the end plate is bent to the right to form a cylindrical part, the right end of the cylindrical part is bent outward to form an annular plate two, and the annular plate one and the annular plate two are fixed by welding.

[0009] In the above-mentioned welded pump barrel for a horizontal multistage pump, the second annular plate is attached to the left side of the first annular plate.

[0010] In the above-mentioned welded pump barrel for a horizontal multistage pump, the length of the overlapping portion between the second annular plate and the first annular plate is 4mm-7mm.

[0011] In the above-mentioned welded pump barrel for a horizontal multistage pump, the width of the annular plate is 4.5mm-8mm.

[0012] In the aforementioned horizontal multistage pump barrel for welding, the annular plate has a protrusion for energy storage welding protruding to the left.

[0013] In the above-mentioned welded pump cylinder for a horizontal multistage pump, the cylinder body is a seamless steel pipe, and the left end of the seamless steel pipe is bent inward to form an annular plate.

[0014] In the above-mentioned welded pump cylinder for a horizontal multistage pump, the cylinder body can also be formed by rolling stainless steel plates into a circle and then welding them.

[0015] In the aforementioned welded pump barrel for a horizontal multistage pump, the inlet body is formed by stamping stainless steel plate.

[0016] The outstanding advantages of this utility model compared to the prior art are:

[0017] 1. This utility model divides the pump cylinder into a hollow cylinder with open ends and a water inlet body located at the left end of the cylinder. Compared with a pump cylinder with one end closed, the hollow cylinder with open ends is easier to process, and the shallow water inlet body is also easier to process. At the same time, since the cylinder is not restricted by the mold, the length of the cylinder can be freely increased. When it is necessary to increase the length of the pump cylinder, only the length of the cylinder needs to be increased, while the water inlet body remains unchanged. There is no need to re-open the mold, which reduces costs. Furthermore, the left end of the cylinder is bent inward to form an annular plate. The water inlet body is fixed to the annular plate by welding, which is convenient for welding, and the connection is firm, reliable, and has good sealing performance.

[0018] 2. The water inlet of this utility model includes an end plate. The outer periphery of the end plate is bent to the right to form a cylindrical part. The right end of the cylindrical part is bent outward to form an annular plate two. The annular plate one and the annular plate two are fixed by welding. The water inlet is designed as a stepped shape and is formed by stamping, which is convenient for forming. The cylindrical part has a simple structure and is easy to process. Attached image description:

[0019] Figure 1 This is a cross-sectional view of the prior art;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a cross-sectional view of the cylinder of this utility model when it is not welded;

[0022] Figure 4 This is a left view of the cylinder of this utility model before welding;

[0023] Figure 5 This is a cross-sectional view of the water inlet of this utility model when it is not welded.

[0024] Figure label:

[0025] Figure 1In the middle: 1. Pump cylinder body; 2. Water outlet pipe; 3. Water inlet pipe.

[0026] Figure 2-5 In the middle: 11. Cylinder body; 12. Water inlet body; 121. End plate; 122. Cylindrical part; 123. Annular plate two; 13. Water outlet pipe; 14. Water inlet pipe; 15. Annular plate one; 16. Protrusion. Detailed implementation method:

[0027] The present invention will be further described below with reference to specific embodiments. See also: Figure 2 —5:

[0028] A welded pump barrel for a horizontal multistage pump includes a hollow cylinder 11 with openings at both ends and a water inlet 12 disposed at the left end of the cylinder 11. The cylinder 11 is provided with a water outlet pipe 13, and the water inlet 12 is provided with a water inlet pipe 14. The left end of the cylinder 11 is bent inward to form an annular plate 15, and the water inlet 12 is fixed to the annular plate 15 by welding.

[0029] like Figure 2-5 As shown, this utility model divides the pump cylinder into a hollow cylinder 11 with openings at both ends and a water inlet 12 located at the left end of the cylinder 11. The hollow cylinder 11 with openings at both ends is easier to process than a pump cylinder with one end closed. The shallow water inlet 12 is also easier to process. At the same time, since the cylinder 11 is not restricted by the mold, its length can be freely increased. When it is necessary to increase the length of the pump cylinder, only the length of the cylinder 11 needs to be increased, while the water inlet 12 remains unchanged. There is no need to re-open the mold, which reduces costs. Furthermore, the left end of the cylinder 11 is bent inward to form an annular plate 15. The water inlet 12 is fixed to the annular plate 15 by welding, which is convenient for welding, and the connection is firm, reliable, and has good sealing performance.

[0030] Forming method of the water inlet: The water inlet 12 is formed by stamping stainless steel plate.

[0031] The specific structure of the water inlet body 12: The water inlet body 12 includes an end plate 121, the outer periphery of which is bent to the right to form a cylindrical part 122, and the right end of the cylindrical part 122 is bent outward to form an annular plate 123. The annular plate 15 and the annular plate 123 are fixed by welding. The water inlet body 12 is designed in a stepped shape and is formed by stamping, which is convenient for forming. The cylindrical body 11 has a simple structure and is easy to process.

[0032] Preferably, the second annular plate 123 is attached to the left side of the first annular plate 15.

[0033] To ensure a strong and reliable weld while minimizing material consumption and weight, the overlap length between the second annular plate 123 and the first annular plate 15 is 4mm-7mm. In this embodiment, the overlap length L between the second annular plate 123 and the first annular plate 15 is 5mm.

[0034] To further ensure the connection strength of the cylinder 11, the width of the annular plate 15 is 4.5mm-8mm. In this embodiment, the width W of the annular plate 15 is 5.5mm.

[0035] Furthermore, the annular plate 15 has a protrusion 16 for energy storage welding protruding to the left. First, the annular plate 15 and the water inlet 12 are positioned by energy storage welding. Then, the water inlet 12 is welded to the annular plate 15 around its entire circumference using argon arc welding. The welding is relatively precise and the welding effect is good.

[0036] To facilitate the processing of the cylinder 11, the cylinder 11 is made of seamless steel pipe, with the left end of the seamless steel pipe bent inward to form an annular plate 15. Existing seamless steel pipes are purchased and then cut to the required length.

[0037] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A welded pump barrel for a horizontal multistage pump, characterized in that: It includes a hollow cylinder (11) with openings at both ends and a water inlet (12) located at the left end of the cylinder (11). The cylinder (11) is provided with a water outlet pipe (13), and the water inlet (12) is provided with a water inlet pipe (14). The left end of the cylinder (11) is bent inward to form an annular plate (15), and the water inlet (12) is fixed to the annular plate (15) by welding.

2. The welded pump barrel for a horizontal multistage pump according to claim 1, characterized in that: The water inlet body (12) includes an end plate (121), the outer periphery of which is bent to the right to form a cylindrical part (122), the right end of which is bent outward to form an annular plate (123), and the annular plate (15) and the annular plate (123) are fixed by welding.

3. The welded pump casing for a horizontal multistage pump according to claim 2, characterized in that: The second annular plate (123) is attached to the left side of the first annular plate (15).

4. The welded pump casing for a horizontal multistage pump according to claim 2, characterized in that: The length of the overlapping portion between the second annular plate (123) and the first annular plate (15) is 4mm-7mm.

5. The welded pump casing for a horizontal multistage pump according to claim 1, characterized in that: The width of the annular plate (15) is 4.5mm-8mm.

6. The welded pump barrel for a horizontal multistage pump according to claim 1, characterized in that: The annular plate (15) has protrusions (16) to the left for energy storage welding.

7. The welded pump casing for a horizontal multistage pump according to claim 1, characterized in that: The cylinder (11) is a seamless steel pipe, and the left end of the seamless steel pipe is bent inward to form an annular plate (15).

8. The welded pump barrel for a horizontal multistage pump according to claim 1, characterized in that: The water inlet (12) is formed by stamping stainless steel plate.

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