A kit of inlet and outlet pipes for an engineering plastic centrifugal pump

Abstract

The utility model discloses a kind of for engineering plastic centrifugal pump's suit type import and export pipe, including outlet pipe shell and inner lining, inner lining is set as "G" shape, and the inside of inner lining is provided with through-hole;Outlet pipe shell is provided with inner lining groove, inner lining is installed in inner lining groove correspondingly, and inner lining outer wall and the groove wall between inner lining groove are additionally equipped with top ring between them.This device adopts the structure form that outlet pipe shell of cast iron material and inner lining of ultrahigh molecular weight polyethylene material are separated and well processed last assembled together to constitute integral structure, specifically can adopt the method of outlet pipe lining and split type metal top ring directly inserted into outlet pipe shell and left and right split type outlet pipe shell to realize, outlet pipe shell uses cast iron material, after processing, it can be directly sand, paint and then put into warehouse for standby;Outlet pipe lining uses ultrahigh molecular weight polyethylene special plastic technology mass production, simplifies processing procedure, effectively improves production capacity, adapts to mass production.

Description

Technical Field

[0001] This utility model relates to the field of engineering plastic centrifugal pump technology, specifically a set of inlet and outlet pipes for engineering plastic centrifugal pumps. Background Technology

[0002] In the prior art, the structure of an engineering plastic centrifugal pump typically includes an internal main shaft, bearings, bearing housing, bearing end cover, seal, pump casing, impeller, and inlet / outlet pipes. For example, the "corrosion-resistant engineering plastic centrifugal pump" disclosed in the technical solution CN212643088U includes a pump chamber, a chamber shell, a coil, and a main shaft; the "engineering plastic centrifugal pump for conveying corrosive liquids" disclosed in the technical solution CN2293666Y includes an engineering plastic corrosion-resistant centrifugal pump composed of a pump casing, blades, a disc surface, a support, an impeller shaft, a stationary ring, a dynamic ring, and a motor; and the "centrifugal pump" disclosed in CN216407174U includes a pump body front cover, a pump body rear cover, an inlet connector, an outlet connector, a pump body connector, and an impeller.

[0003] All of the aforementioned technical structures require inlet and outlet pipes on the pump body. In existing technologies, these inlet and outlet pipes are crucial components connecting engineering plastic centrifugal pumps to other equipment. The flow-through components of existing engineering plastic centrifugal pumps primarily use ultra-high molecular weight polyethylene (UHMWPE), and the inlet and outlet pipes are also made of UHMWPE through hot molding. While this hot molding process is effective, it is cumbersome and inefficient, producing only one or two units per person per shift. Further machining, sanding, and painting are required before use, severely hindering production and becoming a bottleneck. While alternative designs could increase output, the hot molding structure is integrally formed, necessitating structural modifications. Therefore, there is an urgent need to develop a structure suitable for mass production, simplifying processing without compromising quality, to meet the demands of large-scale production.

[0004] Therefore, in order to solve the above problems, it is necessary to develop a set of inlet and outlet pipes for engineering plastic centrifugal pumps that has a reasonable structure, is suitable for mass production, simplifies the processing procedure, and does not reduce the quality of the finished product. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a packaged inlet and outlet pipe for engineering plastic centrifugal pumps; the technical solution is as follows:

[0006] A set of inlet and outlet pipes for an engineering plastic centrifugal pump includes an outlet pipe shell and an inner liner installed inside the outlet pipe shell. The inner liner is configured in an "I" shape and has a through hole inside. An inner liner groove is provided inside the outlet pipe shell, and the inner liner is installed in the inner liner groove. A top ring is also installed between the outer wall of the inner liner and the groove wall of the inner liner groove.

[0007] Furthermore, the outlet pipe shell is made of cast iron, and the inner lining is made of ultra-high molecular weight polyethylene.

[0008] Furthermore, two top rings are provided, both of which are semi-cylindrical structures; the top rings are made of metal, and placing the top rings on both sides can make the structure compact and ensure sealing, etc.

[0009] Furthermore, the upper end of the inner lining groove inside the outlet pipe shell is provided with an outwardly expanding annular groove; and the upper end of the "I"-shaped inner lining is correspondingly embedded in the expanding groove, while the lower end is smaller than the upper end and is correspondingly embedded in the inner lining groove.

[0010] Furthermore, the outer diameter of the lower end of the liner is the same as the inner diameter of the liner groove. The liner is correspondingly embedded in the liner groove, so that an installation space is formed between the groove wall of the liner groove and the outer wall of the liner. The top ring is correspondingly set in the installation space.

[0011] Furthermore, the height of the top ring is the same as the distance between the upper and lower ends of the inner lining, so that the top ring is fitted between the upper and lower ends of the outer wall of the inner lining.

[0012] Furthermore, the outlet pipe shell has a split structure, which is divided into two symmetrical shell structures in the middle, and the inner liner is correspondingly wrapped inside the two shell structures.

[0013] Furthermore, corresponding positioning pins are provided at the mating end faces of the two shell structures, and the two shell structures are positioned accordingly by the positioning pins during installation.

[0014] Furthermore, locking bolts are also installed on the two shell structures respectively, and the two shell structures are installed into one unit by the locking bolts to form an integral outlet pipe shell.

[0015] Beneficial Effects: This utility model has the following beneficial effects: This device adopts a new split structure to assemble a set of inlet and outlet pipes. Specifically, the outlet pipe shell made of cast iron and the inner liner made of ultra-high molecular weight polyethylene are processed separately and then assembled together to form an overall structure. Specifically, this can be achieved by directly inserting the outlet pipe liner and the split metal top ring into the outlet pipe shell, or by sandwiching the ultra-high molecular weight polyethylene inner liner between the left and right split outlet pipe shells. The outlet pipe shell is made of cast iron, and after processing, it can be directly cleaned of sand, painted, and stored for later use. The outlet pipe liner is made of ultra-high molecular weight polyethylene and is mass-produced using a special plasticizing process, which simplifies the processing steps, effectively improves production capacity, and is suitable for mass production. Attached Figure Description

[0016] Figure 1 This is an assembly drawing of the present utility model;

[0017] Figure 2 This is an internal sectional view of the present invention;

[0018] Figure 3 This is an exploded view of the interior of this utility model;

[0019] Figure 4 This is an assembly structure diagram of the present invention;

[0020] The components include: outlet pipe shell 1, shell structure 101, positioning pin 102, inner liner 2, locking bolt 103, upper end 201, lower end 202, through hole 3, top ring 4, outer expansion groove 5, and inner liner groove 6. Detailed Implementation

[0021] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented under the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0022] like Figure 1 As shown, a set of inlet and outlet pipes for an engineering plastic centrifugal pump includes an outlet pipe shell 1 and an inner liner 2 installed inside the outlet pipe shell 1. The inner liner 2 is configured in an "I" shape and has a through hole 3 inside. An inner liner groove 6 is provided inside the outlet pipe shell 1, and the inner liner 2 is installed in the inner liner groove 6. A top ring 4 is also installed between the outer wall of the inner liner 2 and the groove wall of the inner liner groove 6.

[0023] The outlet pipe shell 1 is made of cast iron, and the inner lining 2 is made of ultra-high molecular weight polyethylene; there are two top rings 4, and both top rings 4 are made of semi-cylindrical structure.

[0024] like Figure 2As shown, the upper end of the inner lining groove 6 inside the outlet pipe shell 1 is provided with an outwardly expanding annular groove 5; while the upper end 201 of the "I"-shaped inner lining 2 is correspondingly embedded in the outwardly expanding groove 5, and the lower end 202 is smaller than the upper end 201, and the lower end 202 is correspondingly embedded in the inner lining groove 6.

[0025] The outer diameter of the lower end 202 of the inner liner 2 is the same as the inner diameter of the inner liner groove 6. The inner liner 2 is correspondingly embedded in the inner liner groove 6, so that an installation space is formed between the groove wall of the inner liner groove 6 and the outer wall of the inner liner 2. The top ring 4 is correspondingly set in the installation space.

[0026] The height of the top ring 4 is the same as the distance between the upper end 201 and the lower end 202 of the inner lining 2, so that the top ring 4 is fitted between the upper end 201 and the lower end 202 of the outer wall of the inner lining 2.

[0027] like Figure 3 As shown, the outlet shell 1 has a split structure, and the outlet shell 1 is divided into two symmetrical shell structures 101 from the middle. The inner liner 2 is correspondingly wrapped inside the two shell structures 101.

[0028] The two shell structures 101 are also provided with corresponding positioning pins 102 at their mating end faces. When the two shell structures 101 are installed, they are positioned accordingly by the positioning pins 102.

[0029] like Figure 4 As shown, locking bolts 103 are also installed on the two shell structures 101 respectively. The two shell structures 101 are installed into one piece by the locking bolts 103 to form an integral outlet pipe shell 1.

[0030] like Figure 1 As shown, the technical solution of this device divides the thermoformed inlet and outlet pipe structure into two important parts for corresponding installation. Specifically, it includes the outlet pipe shell 1 and the inner liner 2. First, the material of the inlet and outlet pipe shell 1 is set as cast iron. The inlet pipe shell can be manufactured by machining. The inner liner 2 is set as ultra-high molecular weight polyethylene, which is conventional in the prior art. It can be manufactured by thermoforming technology. While waiting for the inner liner 2 to cool down, the outlet pipe shell 1 can be manufactured by machining or other means. Then, the two are installed as one, which effectively improves work efficiency.

[0031] The device also requires specific structural configurations for the inner liner 2 and the outlet pipe shell 1. The inner liner 2 is shaped like an "I," with an upper end 201 and a lower end 202. An internal through-hole 3 serves as the outlet pipe. The outlet pipe shell 1, in accordance with the shape of the inner liner 2, has an inner liner groove 2 and a corresponding outer expansion groove 5 at its upper end. When the inner liner 2 is installed, the upper end 201 can be embedded in the outer expansion groove 5, while the lower end 202 is directly installed in the inner liner groove 2. This creates an installation space between the inner liner 2 and the inner liner groove 2, allowing the two top rings 4 to be placed within this space. The overall structure becomes more compact and rational, exhibiting the same performance as the outlet pipe shell 1 formed directly by hot molding in existing technologies. The structure is reasonable and compact, easy to install and disassemble, and does not reduce product quality.

[0032] Furthermore, to facilitate the installation and disassembly of the overall structure, the outlet pipe shell 1 is designed as a split structure, forming two symmetrical structures. Specifically, it can be constructed by installing two shell structures 101. Positioning pins 102 are provided at the mating end faces of the two shell structures 101, which can be used to fix the position. Then, it is locked by locking bolts 103 provided on the outside. The inner liner 2 is correspondingly wrapped and fixed by the two shell structures 101, making disassembly and installation very convenient.

[0033] This device adopts a new split structure to assemble a set of inlet and outlet pipes. Specifically, the outlet pipe shell 1, made of cast iron, and the inner liner 2, made of ultra-high molecular weight polyethylene, are processed separately and then assembled together to form the overall structure. Specifically, the outlet pipe inner liner 2 and the split metal top ring 4 can be directly inserted into the outlet pipe shell 1, or the left and right split outlet pipe shell 1 can be used to sandwich the ultra-high molecular weight polyethylene inner liner 2. The outlet pipe shell 1 is made of cast iron, and after processing, it can be directly cleaned of sand and painted and stored for later use. The outlet pipe inner liner 2 is made of ultra-high molecular weight polyethylene and is mass-produced using a special plasticizing process, which simplifies the processing steps, effectively improves the production capacity, and is suitable for mass production.

[0034] The above-described specific embodiments are merely preferred embodiments of this utility model and are not intended to limit the implementation of this utility model or the scope of the claims. All equivalent changes and modifications made in accordance with the scope of protection of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A packaged inlet and outlet pipe for an engineering plastic centrifugal pump, characterized in that: It includes an outlet pipe shell (1) and an inner liner (2) installed inside the outlet pipe shell (1). The inner liner (2) is configured in the shape of an "I". The inner liner (2) has a through hole (3) inside. The outlet pipe shell (1) has an inner liner groove (6). The inner liner (2) is installed in the inner liner groove (6). A top ring (4) is also installed between the outer wall of the inner liner (2) and the groove wall of the inner liner groove (6).

2. The packaged inlet and outlet pipe for an engineering plastic centrifugal pump according to claim 1, characterized in that: The outlet pipe shell (1) is made of cast iron, and the inner lining (2) is made of ultra-high molecular weight polyethylene.

3. The packaged inlet and outlet pipe for an engineering plastic centrifugal pump according to claim 1, characterized in that: There are two top rings (4), and both top rings (4) are set as semi-cylindrical structures.

4. The packaged inlet and outlet pipe for an engineering plastic centrifugal pump according to claim 2, characterized in that: The upper end of the inner lining groove (6) inside the outlet pipe shell (1) is provided with an outwardly expanding annular groove (5); the upper end (201) of the "I"-shaped inner lining (2) is correspondingly embedded in the outer expansion groove (5), and the lower end (202) is smaller than the upper end (201), and the lower end (202) is correspondingly embedded in the inner lining groove (6).

5. A packaged inlet and outlet pipe for an engineering plastic centrifugal pump according to claim 4, characterized in that: The outer diameter of the lower end (202) of the liner (2) is the same as the inner diameter of the liner groove (6). The liner (2) is fitted into the liner groove (6) so that an installation space is formed between the groove wall of the liner groove (6) and the outer wall of the liner (2). The top ring (4) is set in the installation space.

6. A packaged inlet and outlet pipe for an engineering plastic centrifugal pump according to claim 5, characterized in that: The height of the top ring (4) is the same as the distance between the upper end (201) and the lower end (202) of the inner lining (2), so that the top ring (4) is fitted between the upper end (201) and the lower end (202) of the outer wall of the inner lining (2).

7. A packaged inlet and outlet pipe for an engineering plastic centrifugal pump according to claim 1, characterized in that: The outlet shell (1) is a split structure, which is divided into two symmetrical shell structures (101) in the middle. The inner liner (2) is wrapped inside by the two shell structures (101).

8. A packaged inlet and outlet pipe for an engineering plastic centrifugal pump according to claim 7, characterized in that: The two shell structures (101) are also provided with corresponding positioning pins (102) at their mating end faces. When the two shell structures (101) are installed, they are positioned accordingly by the positioning pins (102).

9. A packaged inlet and outlet pipe for an engineering plastic centrifugal pump according to claim 8, characterized in that: Locking bolts (103) are also installed on the two shell structures (101) respectively, and the two shell structures (101) are installed into one unit by the locking bolts (103) to form an integral outlet pipe shell (1).

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