Pump body structure of centrifugal pump

Abstract

The utility model discloses a centrifugal pump body structure which comprises a motor and a pump head, the pump head is formed by splicing a first pump body shell and a second pump body shell, a water inlet is formed in the front face of the second pump body shell, a water outlet is formed in the side wall of the second pump body shell, a transmission shaft penetrates through the first pump body shell, one end of the transmission shaft is connected with the motor, and the other end of the transmission shaft is connected with the pump head. A filter screen is installed in the second pump body shell, and the filter screen is located between the impeller and the water inlet. The side, close to the water inlet, of the filter screen is rotationally connected with a rotating rod, the rotating rod extends into the water inlet, and a scraping piece is fixed to the rotating rod and tightly attached to the side, close to the water inlet, of the filter screen. The rotary rod is arranged to drive the scraper to rotate, impurities attached to the surface of the filter screen can be scraped, a user can control the rotary rod to rotate through the water inlet, when the filter screen is cleaned, the pump head does not need to be opened, the filter screen does not need to be detached, and cleaning is more convenient and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a pump body structure of a centrifugal pump. Background Technique

[0002] A centrifugal water pump, abbreviated as a centrifugal pump, is a machine that uses the centrifugal motion of water for pumping water. Its working principle is: when the impeller rotates rapidly, the blades cause the water to rotate quickly. The rotating water flies out of the impeller under the action of centrifugal force and is discharged from the water outlet to achieve continuous water pumping.

[0003] However, at present, when the existing centrifugal pump transports water flow containing impurities, a filter element is arranged in the pump head to prevent the impurities from damaging the impeller. However, after long-term use, the impurities adhere to the surface of the filter element, affecting the water flow velocity. At this time, it is necessary to open the pump head and then disassemble the filter element to clean the impurities adhering to its surface, and the cleaning operation is rather troublesome.

[0004] Therefore, we propose a pump body structure of a centrifugal pump to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a pump body structure of a centrifugal pump to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A pump body structure of a centrifugal pump includes a motor and a pump head. The pump head is spliced by a first pump body shell and a second pump body shell. An inlet is arranged on the front surface of the second pump body shell, and a water outlet is arranged on the side wall of the second pump body shell. A transmission shaft penetrates through the first pump body shell. One end of the transmission shaft is connected to the motor, and the other end is provided with an impeller. A filter screen is installed inside the second pump body shell, and the filter screen is located between the impeller and the inlet.

[0008] One side of the filter screen close to the inlet is rotatably connected with a rotating rod, and the rotating rod extends into the inlet. A scraping blade is fixed on the rotating rod, and the scraping blade is closely attached to the side of the filter screen close to the inlet. The rotating rod drives the scraping blade to rotate to scrape the impurities on the surface of the filter screen. A sewage outlet is arranged under the side wall of the second pump body shell.

[0009] In a further embodiment, the axis lines of the rotating rod, the filter screen and the inlet coincide with each other, and the length of the scraping blade is greater than the diameter of the filtering area of the filter screen.

[0010] In a further embodiment, a conical operating head is arranged at one end of the rotating rod extending into the inlet.

[0011] In a further embodiment, the outer shape of one end of the operating head close to the rotating rod adopts a hexagonal structure.

[0012] In a further embodiment, a ring groove is provided on the connecting edge of the pump body shell 1, and a convex ring is provided on the connecting edge of the pump body shell 2 at a position corresponding to the ring groove, and a sealing ring is sandwiched between the convex ring and the ring groove.

[0013] In a further embodiment, the lower end of the sewage outlet is buckled with a sealing cover, and the end of the sealing cover extending into the sewage outlet is provided with a trapezoidal boss, the outer wall of the boss is inlaid with a sealing gasket, and the sealing gasket is tightly fitted to the inner wall of the lower end of the sewage outlet.

[0014] In a further embodiment, the sealing cover is connected to the lower edge of the sewage outlet by bolts, and the bolts are distributed on two symmetrical horizontal sides of the sealing cover.

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

[0016] The utility model can scrape off impurities attached to the surface of the filter screen by arranging a rotating rod to drive the scraper to rotate, and the user can operate the rotating rod to rotate through the water inlet, so that when cleaning the filter screen, there is no need to open the pump head and disassemble the filter screen, and the cleaning is more convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the rear side structure of the pump head of the utility model after being cut open;

[0019] Figure 3 This is a schematic diagram of the front side structure of the pump head of the utility model after being cut open;

[0020] Figure 4 For this utility model Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0021] Figure 5 It is a schematic diagram of the structure of the connection between the sewage outlet and the sealing cover after cutting.

[0022] In the figure: 1, motor; 2, pump casing 1; 21, ring groove; 3, pump casing 2; 31, convex ring; 4, water inlet; 5, water outlet; 6, transmission shaft; 7, impeller; 8, filter screen; 81, rotating rod; 82, scraper; 83, operating head; 9, sewage outlet; 10, sealing cover; 101, boss; 11, sealing ring; 12, sealing gasket. DETAILED DESCRIPTION

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "plural" is two or more than two.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-3, a centrifugal pump housing structure, comprising a motor 1 and a pump head. The pump head is formed by splicing a pump housing shell one 2 and a pump housing shell two 3. The outer edges of the pump housing shell one 2 and the pump housing shell two 3 are connected and fixed by several groups of bolts and nuts. A water inlet 4 is provided at the center of the front surface of the pump housing shell two 3, and a water outlet 5 is provided on the side wall of the pump housing shell two 3. A transmission shaft 6 passes through the pump housing shell one 2, and the transmission shaft 6 is rotationally connected to the pump housing shell one 2. One end of the transmission shaft 6 is connected to the output shaft of the motor 1, and the other end is installed with an impeller 7, thereby driving the impeller 7 to rotate. A filter screen 8 is installed inside the pump housing shell two 3. The middle of the filter screen 8 is a mesh structure for filtering water. The edge of the filter screen 8 is annular for abutting against the convexity on the inner wall of the pump housing shell two 3. The filter screen 8 is locked to the pump housing shell two 3 by bolts and can be disassembled and replaced later. The filter screen 8 is located between the impeller 7 and the water inlet 4, thereby preventing impurities from damaging the impeller 7. A rotating rod 81 is rotationally connected to one side of the filter screen 8 close to the water inlet 4, and the rotating rod 81 extends into the water inlet 4. A scraping blade 82 is fixed on the rotating rod 81, and the scraping blade 82 is closely attached to one side of the filter screen 8 close to the water inlet 4. The rotating rod 81 drives the scraping blade 82 to rotate to scrape off the impurities on the surface of the filter screen 8. A sewage outlet 9 is provided under the side wall of the pump housing shell two 3, and the cleaned impurities fall to the sewage outlet 9 for easy discharge from the pump head.

[0027] Please refer to Figure 3 , to ensure the sufficiency of the cleaning by the scraping blade 82, the axis lines of the rotating rod 81, the filter screen 8 and the water inlet 4 are set to coincide with each other, and the length of the scraping blade 82 is greater than the diameter of the filtering area of the filter screen 8.

[0028] Please refer to Figure 3 , one end of the rotating rod 81 extending into the water inlet 4 is provided with a conical operating head 83, thereby reducing the resistance to water flow. At the same time, the outer shape of the operating head 83 close to the rotating rod 81 adopts a hexagonal structure, which is convenient for connecting an external hexagonal socket for rotation operation and makes its rotation more convenient.

[0029] Please refer to Figure 4 , a ring groove 21 is provided on the connecting edge of the pump housing shell one 2, and a convex ring 31 corresponding to the position of the ring groove 21 is provided on the connecting edge of the pump housing shell two 3. When the pump housing shell one 2 and the pump housing shell two 3 are butted and locked, the convex ring 31 is buckled in the ring groove 21, and a sealing ring 11 is clamped between the convex ring 31 and the ring groove 21, thereby improving the connection tightness.

[0030] Please refer to Figure 5, a sealing cover 10 is buckled to the lower port of the sewage outlet 9, and a trapezoidal boss 101 is provided at one end of the sealing cover 10 extending into the sewage outlet 9. A sealing gasket 12 is embedded on the outer side wall of the boss 101, and the sealing gasket 12 is in close fit with the inner wall of the lower port of the sewage outlet 9, improving the sealing performance of the connection between the sealing cover 10 and the sewage outlet 9. At the same time, the sealing cover 10 and the lower edge of the sewage outlet 9 are connected by bolts, and the bolts are distributed on two symmetric horizontal sides of the sealing cover 10. The horizontally locked bolts make the sealing cover 10 less likely to loosen.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0032] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A centrifugal pump housing structure, comprising a motor (1) and a pump head, characterized in that: The pump head is formed by splicing a pump body shell one (2) and a pump body shell two (3). The front of the pump body shell two (3) is provided with a water inlet (4), and the side wall of the pump body shell two (3) is provided with a water outlet (5). A transmission shaft (6) passes through the pump body shell one (2). One end of the transmission shaft (6) is connected to the motor (1), and the other end is installed with an impeller (7). A filter screen (8) is installed inside the pump body shell two (3), and the filter screen (8) is located between the impeller (7) and the water inlet (4). A rotating rod (81) is rotatably connected to one side of the filter screen (8) close to the water inlet (4), and the rotating rod (81) extends into the water inlet (4). A scraping blade (82) is fixed on the rotating rod (81), and the scraping blade (82) is closely attached to one side of the filter screen (8) close to the water inlet (4). The rotating rod (81) drives the scraping blade (82) to rotate to scrape off impurities on the surface of the filter screen (8). A sewage outlet (9) is provided under the side wall of the pump body shell two (3).

2. The centrifugal pump casing structure according to claim 1, wherein: The axis lines of the rotating rod (81), the filter screen (8), and the water inlet (4) coincide with each other, and the length of the scraping blade (82) is greater than the diameter of the filtering area of the filter screen (8).

3. The centrifugal pump casing structure according to claim 1, characterized in that: One end of the rotating rod (81) extending into the water inlet (4) is provided with a conical operating head (83).

4. A centrifugal pump casing structure according to claim 3, characterized in that: The outer shape of one end of the operating head (83) close to the rotating rod (81) is a hexagonal structure.

5. A centrifugal pump body structure according to claim 1, characterized in that: A ring groove (21) is formed on the connecting edge of the pump body shell one (2), and a convex ring (31) is provided at the position corresponding to the ring groove (21) on the connecting edge of the pump body shell two (3). A sealing ring (11) is clamped between the convex ring (31) and the ring groove (21).

6. A centrifugal pump casing structure according to claim 1, characterized in that: A sealing cover (10) is provided at the lower port of the sewage outlet (9). One end of the sealing cover (10) extending into the sewage outlet (9) is provided with a trapezoidal boss (101). A sealing gasket (12) is embedded on the outer side wall of the boss (101), and the sealing gasket (12) is closely attached to the inner wall of the lower port of the sewage outlet (9).

7. A centrifugal pump casing structure according to claim 6, characterized in that: The sealing cover (10) and the lower edge of the sewage outlet (9) are connected by bolts, and the bolts are distributed on the two symmetric horizontal sides of the sealing cover (10).

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