Stainless steel pump head of oil immersion pump

Abstract

The utility model provides a stainless steel pump head of an oil immersion pump, and belongs to the technical field of mechanical equipment. The technical problems that an existing oil immersion pump head is long in production period, low in production efficiency and the like are solved. The stainless steel pump head of the oil immersion pump comprises a pump head main body, an upper flange and a lower flange, the pump head main body is a cylindrical step part which is formed by stamping a stainless steel plate and is uniform in wall thickness, and the cylindrical step part comprises a small cylinder, a large cylinder and a connecting plate; the inner surface, connected with the large cylinder, of the connecting plate is a mounting contact surface I; the upper flange is a hollow small annular plate made of a stainless steel plate, and the lower flange is a hollow large annular plate made of a stainless steel plate; the small cylinder and the small annular plate are fixed through laser welding; the large cylinder and the large annular plate are fixed through laser welding. The utility model has the advantages of more convenience in processing, shorter production cycle, higher efficiency and reduced environmental pollution.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment, in particular to a stainless steel pump head of an oil-immersed pump. Background Art

[0002] The pump heads of oil-immersed pumps on the market are generally cast in one piece. Casting requires molding with a mold first, cooling after casting, aging treatment for a period of time, and machining. The castings need to be machined for mounting contact surfaces, and then drilled and tapped for fastening screw holes. During machining, tooling fixtures are also required to clamp the parts. Due to uneven wall thickness of parts and changes in production environment conditions, there is a risk of various casting defects during the casting production process. The production process from casting to machining has a long production cycle and low production efficiency.

[0003] For stainless steel castings, the mounting contact surface needs to be machined, and the threaded holes need to be drilled and tapped. Since stainless steel has poor machinability, the wear on tools and drill bits is higher than that on cast iron. There is also a risk of tap breakage during drilling and tapping. Due to surface defects during stainless steel casting, or the influence of impurities mixed into the material, after metal processing, the surface of stainless steel castings needs to be shot blasted or treated with other chemicals, which has a certain pollution effect on the environment. Summary of the invention

[0004] In view of the shortcomings of the prior art, an oil-immersed pump stainless steel pump head is proposed. The problem to be solved by the utility model is: how to make the production of the pump head more convenient, shorten the production cycle, increase the efficiency and reduce the pollution to the environment.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a stainless steel pump head for an oil-immersed pump, comprising a pump head body, an upper flange and a lower flange, the pump head body being a cylindrical stepped portion with uniform wall thickness formed by stamping of stainless steel sheet material, the cylindrical stepped portion comprising an upper small cylinder and a lower large cylinder and a connecting plate connecting the small cylinder and the large cylinder; the inner surface of the connecting plate connected to the large cylinder is a mounting contact surface one that does not require further machining, and the mounting contact surface one is used to abut against the guide vane; the upper flange is a hollow small circular ring plate made by laser cutting of stainless steel sheet material; the lower flange is a hollow large circular ring plate made by laser cutting of stainless steel sheet material; the small cylinder is fixed to the small circular ring plate by welding, and the large cylinder is fixed to the large circular ring plate by welding.

[0006] This solution directly forms the pump head body with a cylindrical stepped portion of uniform wall thickness through the stamping process of stainless steel sheet material. This process has a short production cycle and high production efficiency. The dimensional accuracy of the pump head body after stamping is high, so that the inner surface of the connecting plate connected to the large cylinder does not need to be machined to form the installation contact surface 1, and the size of the installation contact surface 1 matches the size of the guide vane. The upper flange and the lower flange are also directly formed by laser cutting of stainless steel sheet material. After forming, the dimensional accuracy is high, the production cycle is short, and the production efficiency is high. The pump head body and the upper and lower flanges are welded and fixed, making the overall processing convenient, the production cycle is shortened, and the efficiency is increased. The surface of the stainless steel sheet material does not need to be shot blasted, which reduces pollution to the environment. At the same time, compared with the integrally cast stainless steel material, the cost of the existing stainless steel sheet material is lower.

[0007] In the above-mentioned stainless steel pump head, the upper part of the small cylinder extends into the small circular plate, and the outer circumference of the small cylinder and the inner circumference of the small circular plate are abutted and fixed by laser welding; the lower part of the large cylinder extends into the large circular plate, and the outer circumference of the large cylinder and the inner circumference of the large circular plate are abutted and fixed by laser welding; the small circular plate is evenly distributed with a number of fastening holes cut by laser; the lower flange is a hollow large circular plate made by laser cutting of stainless steel sheet material. The upper flange and its fastening hole one are directly formed by laser cutting of stainless steel sheet material, and the lower flange and its fastening hole two are directly formed by laser cutting of stainless steel sheet material. The dimensional accuracy after forming is high, the generation cycle is short, and the production efficiency is high; the pump head body and the upper and lower flanges are fixed by laser welding, and the laser welding speed is fast, the shape is good, the size is stable, and there are few defects. It can achieve high-precision welding, which makes the overall processing convenient, the production cycle is shortened, and the efficiency is increased.

[0008] In the above-mentioned stainless steel pump head, a plurality of reinforcing ribs are fixed by laser welding between the connecting plate, the small cylinder and the small annular plate, and the reinforcing ribs are evenly distributed on the outer circumference of the small cylinder. The connecting plate, the small cylinder and the small annular plate are fixed by laser welding using the reinforcing ribs, so that the overall structure is more solid and convenient for processing.

[0009] In the above-mentioned stainless steel pump head, the reinforcing rib is in the shape of a rectangular parallelepiped, and its upper end face is fixed by laser welding to the lower end face of the small circular ring plate, its lower end face is fixed by laser welding to the upper end face of the connecting plate, and its inner side face is fixed by laser welding to the outer peripheral surface of the small cylinder. There are four reinforcing ribs. The rectangular reinforcing rib has three faces that can respectively abut against the small circular ring plate, the connecting plate and the small cylinder for laser welding, making the whole more solid and convenient for processing.

[0010] In the above stainless steel pump head, the upper end surface of the guide vane is abutted against the top surface of the mounting contact surface 1, and the maximum outer peripheral surface of the guide vane is abutted against the side surface of the mounting contact surface 1. The pump head body has high dimensional accuracy after stamping, which makes assembly more convenient, shortens the production cycle, and improves production efficiency.

[0011] In the above-mentioned stainless steel pump head, the bottom surface of the large circular plate is the second installation contact surface that does not need to be machined, the impeller cover is abutted and connected below the guide vane, the lower part of the impeller cover has a boss protruding outward, the upper end surface of the boss abuts and cooperates with the second installation contact surface, the large circular plate is fixedly connected with the water inlet part through the second fastening hole, the top surface of the water inlet part abuts against the second installation contact surface, and the boss is fixed between the water inlet part and the large circular plate. This makes the matching accuracy of the lower flange, impeller cover and water inlet part higher, the assembly is more convenient, the production cycle is shortened, and the production efficiency is improved.

[0012] In the above-mentioned stainless steel pump head, the lower end surface of the large cylinder does not extend beyond the lower end surface of the large circular plate, and the lower end surface of the large cylinder and the inner circumferential surface of the large circular plate form a sealing groove that does not require machining.

[0013] In the above-mentioned stainless steel pump head, the top surface of the small circular plate is the installation contact surface 3 which needs to be machined, the water outlet part is fixedly connected to the top of the small circular plate through the fastening hole 1, and the installation contact surface 3 is abutted against the lower end surface of the water outlet part, so that the matching accuracy of the upper flange and the water outlet part is higher, the assembly is more convenient, the production cycle is shortened, and the production efficiency is improved.

[0014] In the above-mentioned stainless steel pump head, the upper end surface of the small cylinder does not extend beyond the upper end surface of the small annular plate, and the upper end surface of the small cylinder and the inner circumference of the small annular plate form a sealing groove 2 which does not require machining.

[0015] Compared with the prior art, the technical effects of the utility model are:

[0016] 1. The overall production cycle is short, the production efficiency is high, the molding size accuracy is high, the installation contact surface does not need to be machined, the assembly is more convenient, the production cycle is shortened, and the production efficiency is increased.

[0017] 2. The appearance is more beautiful than the overall casting, and there will be no casting defects.

[0018] 3. Compared with cast stainless steel, the surface does not require shot blasting, which reduces pollution to the environment. At the same time, compared with the integral cast stainless steel material, the cost of existing stainless steel sheets is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a sectional view of the pump head of the utility model.

[0020] Figure 2 It is a three-dimensional diagram of the pump head of the utility model.

[0021] Figure 3 The utility model is a cross-sectional view Figure 2 .

[0022] Figure number marking: 1. Cylindrical stepped portion; 101. Small cylinder; 102. Large cylinder; 103. Connecting plate; 104. Mounting contact surface one; 2. Small circular ring plate; 201. Fastening hole one; 202. Mounting contact surface three; 3. Large circular ring plate; 301. Fastening hole two; 302. Mounting contact surface two; 4. Reinforcing rib; 5. Guide vane; 6. Impeller cover; 601. Boss; 7. Sealing groove one; 8. Water outlet; 9. Sealing groove two; 10. Water inlet. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] according to Figures 1 to 3 As shown: a stainless steel pump head for an oil-immersed pump consists of a pump head body, an upper flange and a lower flange. The pump head body is a cylindrical stepped portion 1 with uniform wall thickness formed by stamping of stainless steel sheet; the upper flange is a hollow small circular plate 2 made by laser cutting of stainless steel sheet, including a number of fastening holes 201 evenly distributed on the small circular plate 2, which are also directly cut by laser; the lower flange is a hollow large circular plate 3 made by laser cutting of stainless steel sheet, including a number of fastening holes 301 evenly distributed on the large circular plate 3, which are also cut by laser.

[0025] The cylindrical stepped portion 1 is composed of a small cylinder 101 at the top, a large cylinder 102 at the bottom, and a connecting plate 103 connecting the small cylinder 101 and the large cylinder 102; the inner surface of the connecting plate 103 connected to the large cylinder 102 is a mounting contact surface 104 that does not need to be machined, and the mounting contact surface 104 is used to abut against the guide vane 5. The upper end surface of the guide vane 5 abuts against the top surface of the mounting contact surface 104, and the maximum outer peripheral surface of the guide vane 5 abuts against the side surface of the mounting contact surface 104. The dimensional accuracy of the pump head body after stamping is high, which makes it more convenient to assemble and install the guide vane 5 and the pump head body, shortens the production cycle, and improves production efficiency.

[0026] The bottom surface of the large circular plate 3 is the second installation contact surface 302 which does not need to be machined. The impeller cover 6 is abutted and connected below the guide vane 5. The lower part of the impeller cover 6 has a boss 601 protruding outward. The upper end surface of the boss 601 abuts and matches with the second installation contact surface 302. The large circular plate 3 is fixedly connected with the water inlet part 10 through the second fastening hole 301. The top surface of the water inlet part 10 abuts against the second installation contact surface 302, and the boss 601 is fixed between the water inlet part 10 and the large circular plate 3. This makes the matching accuracy of the lower flange, the impeller cover 6 and the water inlet part 10 higher, the assembly is more convenient, the production cycle is shortened, and the production efficiency is improved.

[0027] The upper part of the small cylinder 101 extends into the small circular plate 2, and the outer circumference of the small cylinder 101 abuts against the inner circumference of the small circular plate 2 and is fixed by laser welding; the lower part of the large cylinder 102 extends into the large circular plate 3, and the outer circumference of the large cylinder 102 abuts against the inner circumference of the large circular plate 3 and is fixed by laser welding.

[0028] A number of reinforcing ribs 4 are fixed by laser welding between the connecting plate 103, the small cylinder 101 and the small circular ring plate 2, and the reinforcing ribs 4 are evenly distributed on the outer circumference of the small cylinder 101. The connecting plate 103, the small cylinder 101 and the small circular ring plate 2 are fixed by laser welding using the reinforcing ribs 4, so that the overall structure is more solid and convenient for processing. The reinforcing ribs 4 are in the shape of a rectangular parallelepiped, and their upper end faces are fixed by laser welding to the lower end faces of the small circular ring plate 2, their lower end faces are fixed by laser welding to the upper end faces of the connecting plate 103, and their inner side faces are fixed by laser welding to the outer circumference of the small cylinder 101. There are four reinforcing ribs 4. The rectangular reinforcing ribs 4 have three faces that can respectively abut against the small circular ring plate 2, the connecting plate 103 and the small cylinder 101 for laser welding, making the overall structure more solid and convenient for processing.

[0029] The lower end surface of the large cylinder 102 does not extend out of the lower end surface of the large circular plate 3, and the lower end surface of the large cylinder 102 and the inner circumference of the large circular plate 3 form a sealing groove 7 that does not require machining. The top surface of the small circular plate 2 is a mounting contact surface 3 202 that needs to be machined. The water outlet part 8 is fixedly connected to the top of the small circular plate 2 through a fastening hole 1 201, and the mounting contact surface 3 202 is abutted against the lower end surface of the water outlet part 8. This makes the matching accuracy between the upper flange and the water outlet part 8 higher, the assembly is more convenient, the production cycle is shortened, and the production efficiency is increased. The upper end surface of the small cylinder 101 does not extend out of the upper end surface of the small circular plate 2, and the upper end surface of the small cylinder 101 and the inner circumference of the small circular plate 2 form a sealing groove 2 9 that does not require machining.

[0030] The pump head body with a cylindrical stepped portion 1 having uniform wall thickness is directly formed by stamping stainless steel sheet material, so that the production cycle of such processing is short and the production efficiency is high, and the dimensional accuracy of the pump head body by stamping is high, so that the inner surface of the connecting plate 103 connected to the large cylinder 102 does not need to be machined to form a mounting contact surface 104, and the size of the mounting contact surface 104 matches the size of the guide vane 5; the upper flange and its fastening hole 1 201 are also directly formed by laser cutting of stainless steel sheet material, and the lower flange and its fastening hole 2 301 are also directly formed by laser cutting of stainless steel sheet material, and the dimensional accuracy after forming is high, the production cycle is short, and the production efficiency is high; the pump head body and the upper and lower flanges are fixed by laser welding, and the laser welding speed is fast, the shape is good, the size is stable, and the defects are few, and high-precision welding can be achieved, so that the overall processing is convenient, the production cycle is shortened, and the efficiency is increased. The surface of the stainless steel sheet material does not need shot blasting treatment, which reduces the pollution to the environment. At the same time, compared with the integrally cast stainless steel material, the cost of the existing stainless steel sheet material is lower.

[0031] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A stainless steel pump head for an oil-immersed pump, comprising a pump head body, an upper flange and a lower flange, characterized in that: The pump head body is a cylindrical stepped portion (1) with uniform wall thickness formed by stamping of stainless steel sheet material, the cylindrical stepped portion (1) comprising an upper small cylinder (101) and a lower large cylinder (102) and a connecting plate (103) connecting the small cylinder (101) and the large cylinder (102); the inner surface of the connecting plate (103) connected to the large cylinder (102) is a mounting contact surface (104) which does not need to be machined, and the mounting contact surface (104) is used to abut against the guide vane (5); the upper flange is a hollow small circular plate (2) made by laser cutting of stainless steel sheet material; the lower flange is a hollow large circular plate (3) made by laser cutting of stainless steel sheet material; the small cylinder (101) is fixed to the small circular plate (2) by welding, and the large cylinder (102) is fixed to the large circular plate (3) by welding.

2. The stainless steel pump head of an oil-immersed pump according to claim 1, characterized in that: The upper portion of the small cylinder (101) extends into the small circular plate (2), and the outer circumferential surface of the small cylinder (101) is abutted against the inner circumferential surface of the small circular plate (2) and then fixed by laser welding; the lower portion of the large cylinder (102) extends into the large circular plate (3), and the outer circumferential surface of the large cylinder (102) is abutted against the inner circumferential surface of the large circular plate (3) and then fixed by laser welding; the small circular plate (2) is evenly provided with a plurality of first fastening holes (201) cut by laser, and the large circular plate (3) is evenly provided with a plurality of second fastening holes (301) cut by laser.

3. The stainless steel pump head of an oil-immersed pump according to claim 2, characterized in that: A plurality of reinforcing ribs (4) are fixed between the connecting plate (103), the small cylinder (101) and the small annular plate (2) by laser welding, and the reinforcing ribs (4) are evenly distributed on the outer peripheral surface of the small cylinder (101) in the circumferential direction.

4. The stainless steel pump head of an oil-immersed pump according to claim 3, characterized in that: The reinforcing rib (4) is in the shape of a cuboid, its upper end face is fixed to the lower end face of the small annular plate (2) by laser welding, its lower end face is fixed to the upper end face of the connecting plate (103) by laser welding, and its inner side face is fixed to the outer peripheral surface of the small cylinder (101) by laser welding.

5. The stainless steel pump head of an oil-immersed pump according to claim 4, characterized in that: There are four reinforcing ribs (4).

6. The stainless steel pump head for an oil-immersed pump according to any one of claims 1 to 5, characterized in that: The upper end surface of the guide vane (5) is in abutment with the top surface of the first mounting contact surface (104), and the maximum outer peripheral surface of the guide vane (5) is in abutment with the side surface of the first mounting contact surface (104).

7. The stainless steel pump head of an oil-immersed pump according to claim 6, characterized in that: The bottom surface of the large circular plate (3) is a second mounting contact surface (302) that does not require further machining. The guide vane (5) is abutted against an impeller cover (6) below. The lower part of the impeller cover (6) has a boss (601) protruding outward. The upper end surface of the boss (601) abuts against the second mounting contact surface (302). The large circular plate (3) is fixedly connected to the water inlet component (10) through the second fastening hole (301). The top surface of the water inlet component (10) abuts against the second mounting contact surface (302). The boss (601) is fixed between the water inlet component (10) and the large circular plate (3).

8. The stainless steel pump head of an oil-immersed pump according to claim 7, characterized in that: The lower end surface of the large cylinder (102) does not extend beyond the lower end surface of the large circular plate (3), and the lower end surface of the large cylinder (102) and the inner circumferential surface of the large circular plate (3) form a sealing groove (7) that does not require machining.

9. The stainless steel pump head of an oil-immersed pump according to claim 1, characterized in that: The top surface of the small circular plate (2) is a mounting contact surface three (202) that needs to be machined. A water outlet component (8) is fixedly connected to the top of the small circular plate (2) via a fastening hole one (201). The mounting contact surface three (202) is in abutment with the lower end surface of the water outlet component (8).

10. The stainless steel pump head of an oil immersed pump according to claim 9, characterized in that: The upper end surface of the small cylinder (101) does not extend beyond the upper end surface of the small annular plate (2), and the upper end surface of the small cylinder (101) and the inner circumferential surface of the small annular plate (2) form a sealing groove 2 (9) which does not require machining.

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