A multi-stage pump casing with high reliability

Abstract

This utility model relates to the technical field of multistage pumps, and particularly to a highly reliable multistage pump casing, including an inner casing. The inner casing is characterized by: a riser on its outer surface; a sprue on its lower surface; a horizontal runner fixedly connected to the lower surface of the sprue; an inner runner fixedly connected to the outer surface of the horizontal runner; and a multistage filtration mechanism on the outer surface of the inner runner. This highly reliable multistage pump casing features a semi-circular frame that can be installed on the outside of the inner runner, providing a support frame for the multistage filtration mechanism. A baffle plate is used to assemble the semi-circular frame, preventing it from detaching and ensuring that liquid can pass through the filter screen in an orderly manner. A storage slot is cleverly designed on the outside of the mounting frame, allowing for easy installation and removal of the filter screen, facilitating later maintenance and replacement. The mounting frame, as a carrier of the filter screen, provides support for it.

Description

Technical Field

[0001] This utility model relates to the technical field of multistage pumps, and in particular to a multistage pump casing with high reliability. Background Technology

[0002] A multistage pump is a centrifugal pump whose inlet, outlet, and intermediate sections are connected by a tie rod. It can output high water pressure and relies on the rotation of the impeller to generate centrifugal force, thereby drawing out materials. Once the gas density reaches the operating range of a mechanical vacuum pump, it is extracted, gradually achieving a high vacuum. Multistage pumps achieve intake, compression, and exhaust through changes in the pump chamber volume; therefore, they are variable-volume centrifugal pumps. In the operation of multistage pumps, a highly reliable multistage pump casing is required.

[0003] However, existing inner shells are prone to internal shrinkage and cracking defects. Multistage pumps have complex shell structures with many intersections of thin and thick walls, which easily lead to internal shrinkage and cracking defects at the junctions. The thickness of the inner shell differs greatly from the thickness of the flow channel wall, resulting in a serious tendency for solidification heat cracking. The inner shell is a high-pressure pump, which is prone to leakage during use. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage pump casing with high reliability to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage pump casing with high reliability, comprising an inner casing, characterized in that: a riser is provided on the outer surface of the inner casing, a sprue is provided on the lower surface of the inner casing, a transverse sprue is fixedly connected to the lower surface of the sprue, an inlet sprue is fixedly connected to the outer surface of the transverse sprue, and a multi-stage filtration mechanism is provided on the outer surface of the inlet sprue.

[0006] Preferably, the multi-stage filtration mechanism includes a semi-circular frame, a baffle, a storage groove, a mounting frame, a filter screen, and a sealing assembly. The outer surface of the inner gating channel is fitted with a semi-circular frame, the outer surface of the semi-circular frame is fitted with a baffle, the inner surface of the baffle is provided with a storage groove, the inner surface of the storage groove is fitted with a frame, the inner surface of the mounting frame is fitted with a filter screen, and the outer surface of the semi-circular frame is provided with a sealing assembly.

[0007] Preferably, the sealing assembly includes a groove, a sealing ring, a mounting groove, and a sealing gasket. The outer surface of the semi-circular frame has a groove, the inner surface of the groove is fitted with a sealing ring, the lower surface of the groove has a mounting groove, and the inner surface of the mounting groove is fitted with a sealing gasket.

[0008] Preferably, the riser is symmetrically arranged with respect to the central axis of the inner shell, and the ingate is symmetrically arranged with respect to the central axis of the inner shell.

[0009] Preferably, the baffle is installed symmetrically about the length centerline of the semicircular frame, and the storage slots are equally spaced on the inner surface of the semicircular frame.

[0010] Preferably, the outer surface dimensions of the mounting frame match the inner surface dimensions of the storage slot, and the mounting frame is installed at equal intervals on the inner surface of the semi-circular frame.

[0011] Preferably, the grooves are equally spaced on the outer surface of the semi-circular frame, and the outer surface dimensions of the sealing ring match the inner surface dimensions of the grooves.

[0012] Preferably, the mounting grooves are respectively formed at both ends of the semi-circular frame, and the outer surface dimensions of the sealing gasket match the inner surface dimensions of the mounting groove.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: This multi-stage pump housing uses high reliability. Through the arrangement of a semi-circular frame, baffle, storage groove, mounting frame, filter screen, and sealing components, the semi-circular frame can be installed on the outside of the inner runner, providing a supporting frame for the multi-stage filtration mechanism. The baffle can merge the semi-circular frame, preventing the mounting frame from falling off and ensuring that the liquid can pass through the filter screen in an orderly manner for filtration. The storage groove is cleverly designed on the outside of the mounting frame, making it easy to install and remove the filter screen, facilitating later maintenance and replacement. The mounting frame, as the carrier of the filter screen, provides support for it. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall appearance and structure of the present utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the semi-circular frame and the baffle used in conjunction with this utility model;

[0016] Figure 3 This is a schematic diagram of the multi-stage filtration mechanism of this utility model;

[0017] Figure 4 This is a schematic diagram of the sealing component structure of this utility model.

[0018] In the diagram: 1. Inner shell; 2. Riser; 3. Sprue; 4. Runner; 5. Ingate; 6. Multi-stage filtration mechanism; 61. Semi-circular frame; 62. Baffle; 63. Storage groove; 64. Mounting frame; 65. Filter screen; 66. Sealing assembly; 661. Groove; 662. Sealing ring; 663. Mounting groove; 664. Sealing gasket. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a multi-stage pump casing with high reliability, including an inner casing 1, characterized in that: a riser 2 is provided on the outer surface of the inner casing 1, a straight sprue 3 is provided on the lower surface of the inner casing 1, a horizontal sprue 4 is fixedly connected to the lower surface of the straight sprue 3, an inner sprue 5 is fixedly connected to the outer surface of the horizontal sprue 4, and a multi-stage filtration mechanism 6 is provided on the outer surface of the inner sprue 5. Through the arrangement of the inner casing 1, riser 2, straight sprue 3, horizontal sprue 4 and inner sprue 5, during the process of transporting liquid, the liquid is poured in from the straight sprue 3, then connected to the horizontal sprue 4 and enters the inner sprue 5, and then flows into the inner casing 1 and the hidden riser 2.

[0021] Furthermore, the multi-stage filtration mechanism 6 includes a semi-circular frame 61, a baffle 62, a receiving groove 63, a mounting frame 64, a filter screen 65, and a sealing assembly 66. The semi-circular frame 61 is installed on the outer surface of the inlet sprue 5, the baffle 62 is installed on the outer surface of the semi-circular frame 61, the receiving groove 63 is formed on the inner surface of the baffle 62, the frame 64 is installed on the inner surface of the receiving groove 63, the filter screen 65 is installed on the inner surface of the mounting frame 64, and the sealing assembly 66 is provided on the outer surface of the semi-circular frame 61. Through the arrangement of the semi-circular frame 61, the baffle 62, the receiving groove 63, the mounting frame 64, the filter screen 65, and the sealing assembly 66, the semi-circular frame 61 can be installed on the outer side of the inlet sprue 5, providing a support frame for the multi-stage filtration mechanism 6. The baffle 62 can merge the semi-circular frame 61, prevent the mounting frame 64 from falling off, and ensure that the liquid can pass through the filter screen 65 in an orderly manner for filtration. The storage slot 63 is cleverly designed on the outside of the mounting frame 64, which makes it easy to install and remove the filter 65, and facilitates later maintenance and replacement. The mounting frame 64 serves as the carrier for the filter 65, thus providing support for the filter 65.

[0022] Furthermore, the sealing assembly 66 includes a groove 661, a sealing ring 662, a mounting groove 663, and a sealing gasket 664. The outer surface of the semicircular frame 61 has a groove 661, the inner surface of the groove 661 is fitted with a sealing ring 662, the lower surface of the groove 661 has a mounting groove 663, and the inner surface of the mounting groove 663 is fitted with a sealing gasket 664. With the arrangement of the groove 661, sealing ring 662, mounting groove 663, and sealing gasket 664, when the semicircular frame 61 is in use, the sealing gasket 664 is installed in the mounting groove 663, so that when the semicircular frame 61 is connected to the outer side of the ingate 5, the sealing gasket 664 can be squeezed to seal the connection. At the same time, the sealing ring 662 is installed in the groove 661, thereby fixing the semicircular frame 61.

[0023] Furthermore, the riser 2 is symmetrically positioned along the central axis of the inner shell 1, and the ingate 5 is symmetrically positioned along the central axis of the inner shell 1.

[0024] Furthermore, the baffle 62 is installed symmetrically about the length of the semicircular frame 61, and the storage groove 63 is opened at equal intervals on the inner surface of the semicircular frame 61. The semicircular frame 61 is designed to fix the mounting frame 64.

[0025] Furthermore, the outer surface dimensions of the mounting frame 64 match the inner surface dimensions of the storage groove 63. The mounting frame 64 is installed at equal intervals on the inner surface of the semi-circular frame 61. The mounting frame 64 enables the filter screen 65 to be installed and facilitates the installation and removal of the filter screen 65.

[0026] Furthermore, the grooves 661 are equally spaced on the outer surface of the semicircular frame 61, and the outer surface dimensions of the sealing ring 662 match the inner surface dimensions of the grooves 661. The sealing ring 662 is used to fix the semicircular frame 61 and prevent them from falling off.

[0027] Furthermore, mounting grooves 663 are respectively opened at both ends of the semi-circular frame 61, and the outer surface dimensions of the sealing gasket 664 match the inner surface dimensions of the mounting groove 663. The sealing gasket 664 increases the sealing performance between the gasket and the inner gating 5.

[0028] Working principle: The semi-circular frame 61 can be installed on the outside of the ingate 5, providing a support frame for the multi-stage filtration mechanism 6. The baffle 62 can be set to merge the semi-circular frame 61, preventing the mounting frame 64 from falling off and ensuring that the liquid can pass through the filter screen 65 in an orderly manner for filtration. The storage groove 63 is cleverly designed on the outside of the mounting frame 64, making it easy to install and remove the filter screen 65, facilitating later maintenance and replacement. The mounting frame 64 serves as the carrier of the filter screen 65, providing support for it. When the semi-circular frame 61 is in use, the sealing gasket 664 is installed in the mounting groove 663, so that when the semi-circular frame 61 is connected to the outside of the ingate 5, it can compress the sealing gasket 664, thereby sealing the connection. At the same time, the sealing ring 662 is installed in the groove 661, thereby fixing the semi-circular frame 61.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage pump casing with high reliability, characterized by: The device includes an inner shell (1), characterized in that: a riser (2) is provided on the outer surface of the inner shell (1), a sprue (3) is provided on the lower surface of the inner shell (1), a sprue (4) is fixedly connected to the lower surface of the sprue (3), an ingate (5) is fixedly connected to the outer surface of the sprue (4), and a multi-stage filtration mechanism (6) is provided on the outer surface of the ingate (5).

2. The multi-stage pump housing with high reliability of use according to claim 1, characterized in that: The multi-stage filtration mechanism (6) includes a semi-circular frame (61), a baffle (62), a storage groove (63), a mounting frame (64), a filter screen (65), and a sealing assembly (66). The outer surface of the inner gating channel (5) is fitted with a semi-circular frame (61), the outer surface of the semi-circular frame (61) is fitted with a baffle (62), the inner surface of the baffle (62) is provided with a storage groove (63), the inner surface of the storage groove (63) is fitted with a frame (64), the inner surface of the mounting frame (64) is fitted with a filter screen (65), and the outer surface of the semi-circular frame (61) is provided with a sealing assembly (66).

3. The multi-stage pump housing with high reliability of use according to claim 2, characterized in that: The sealing assembly (66) includes a groove (661), a sealing ring (662), a mounting groove (663), and a sealing gasket (664). The outer surface of the semi-circular frame (61) is provided with a groove (661), the inner surface of the groove (661) is provided with a sealing ring (662), the lower surface of the groove (661) is provided with a mounting groove (663), and the inner surface of the mounting groove (663) is provided with a sealing gasket (664).

4. The multi-stage pump housing with high reliability of use according to claim 1, characterized in that: The riser (2) is symmetrically opened with respect to the central axis of the inner shell (1), and the ingate (5) is symmetrically opened with respect to the central axis of the inner shell (1).

5. The multi-stage pump housing with high reliability of use according to claim 2, characterized in that: The baffle (62) is installed symmetrically about the length centerline of the semicircular frame (61), and the storage slot (63) is opened at equal intervals on the inner surface of the semicircular frame (61).

6. The multi-stage pump housing with high reliability of use according to claim 2, characterized in that: The outer surface dimensions of the mounting frame (64) match the inner surface dimensions of the storage slot (63), and the mounting frame (64) is installed at equal intervals on the inner surface of the semi-circular frame (61).

7. The multi-stage pump housing with high reliability of use according to claim 3, characterized in that: The grooves (661) are equally spaced on the outer surface of the semicircular frame (61), and the outer surface dimensions of the sealing ring (662) match the inner surface dimensions of the grooves (661).

8. The multi-stage pump housing with high reliability of use according to claim 3, characterized in that: The mounting grooves (663) are respectively opened at both ends of the semi-circular frame (61), and the outer surface dimensions of the sealing gasket (664) match the inner surface dimensions of the mounting grooves (663).

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