Horizontal split multi-stage centrifugal pump

Abstract

The invention relates to the technical field of centrifugal pumps, and particularly discloses a horizontal split multi-stage centrifugal pump which comprises a pump body, a water inlet is fixedly connected to the front end of the pump body, a filter frame with an annular structure is arranged at the water inlet of the pump body, and a filter screen and a filter plate in the filter frame rotate under the impact of water flow. The water inlet with the limited caliber is provided with a filter screen with a larger area to filter passing water flow, the service life of the filter screen can be prolonged, meanwhile, the maintenance frequency is reduced, the filter frame can be quickly mounted and dismounted by arranging the connecting assembly, and the service life of the filter screen is prolonged. The water inlet of the body is provided with the filter frame with an annular structure design, and the filter screen and the filter plate in the filter frame rotate under the impact of water flow, so that the water flow passing through the water inlet with a limited caliber is filtered by the filter screen with a larger area, and the maintenance frequency can be reduced; the filter frame can be quickly mounted and dismounted by arranging the connecting assembly, so that the filter screen can be conveniently replaced.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pumps, in particular to a horizontal split-center multi-stage centrifugal pump. Background Art

[0002] Horizontal multistage centrifugal pumps have the characteristics of high efficiency, wide performance range, safe and stable operation, low noise, long life, easy installation and maintenance, etc. They are used to transport clean water or other liquids with physical and chemical properties similar to water. They are mainly suitable for water supply and drainage of urban high-rise buildings, water for fire fighting, water supply and drainage of factories and mines, long-distance water delivery, water in production process circulation, HVAC circulation, domestic water, etc.

[0003] Existing multi-stage centrifugal pumps will install a filter at the water inlet when in use to prevent larger impurities from entering the centrifugal pump. Although it can achieve a filtering effect, the area of ​​this type of filter is limited and it is often quickly covered by impurities. The filter needs to be disassembled in a short period of time, and maintenance is quite frequent.

[0004] To this end, we propose a horizontal split multi-stage centrifugal pump. Summary of the invention

[0005] The object of the present invention is to provide a horizontal split multi-stage centrifugal pump to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a horizontal split multi-stage centrifugal pump, comprising a pump body, the front end of which is fixedly connected to a water inlet,

[0007] A filter assembly is arranged at the water inlet of the pump body, and includes a filter frame designed as a ring, and the filter frame is inserted in the middle of the water inlet. The filter plate and filter screen arranged inside the filter frame filter the liquid passing through the filter frame. The filter frame and the filter screen are larger than the area of ​​the water inlet, thereby increasing the service life of a single filter screen and reducing the replacement frequency;

[0008] The connecting component includes a sliding ring sliding inside the filter frame, the sliding ring is docked with the water inlet, and the repulsive force generated between the sliding ring and the water inlet resists the filter frame at the water inlet, thereby increasing the stability of the filter frame.

[0009] The filter plate has a cavity for placing the filter plate inside. The filter plate is circular in design, and a rotating ring is fixedly connected to its annular outer surface. The rotating ring rotates inside the cavity through a bearing. One side outer surface of the filter frame is rotatably connected to a cover plate through a hinge.

[0010] Among them, a plug interface docking with the water inlet is opened on the surface of the cover plate, and a sealing rubber sleeve is provided at the connection position between the plug interface surface and the plug interface, and the plug interface is arranged in the annular area of ​​the cover plate.

[0011] Among them, a connecting rod is fixedly connected to the position of the inner surface of the cavity corresponding to the plug interface, the outer surface of the lower end of the connecting rod is provided with a fan blade that can be driven by water flow, the end of the fan blade is fixedly connected to a rotating wheel, the rotating wheel and the connecting rod are rotatably connected through a bearing, the inner surface of the cavity is rotatably connected to a gear that contacts the inner side of a rotating ring, the inner side of the rotating ring is provided with a tooth groove that meshes with the gear at a position corresponding to the gear, and a belt is sleeved between the gear and the rotating wheel.

[0012] Wherein, the diameter of the fan blade is consistent with the plug-in port.

[0013] Wherein, the diameter of the rotating wheel is greater than the diameter of the gear.

[0014] Wherein, the surface of the filter plate is provided with guide vanes, and the guide vanes are in several groups and face the direction of the pump body.

[0015] Among them, the connecting assembly includes a docking port, the docking port and the plug port are on the same axis, the sliding ring is located inside the docking port and slides, the annular outer surface of the sliding ring is fixedly connected with a slider that provides guidance for the sliding ring, sliding grooves are provided at corresponding positions of the docking port and the slider, and a sealing rubber pad is provided at the position where the sliding ring contacts the water inlet.

[0016] Among them, a stopper is fixedly connected to the annular outer surface of the sliding ring near the upper end, and a pushing block is provided at the corresponding position of the filter frame and the stopper. The part where the pushing block contacts the stopper is of inclined structural design, and the pushing block is of L-shaped structural design as a whole. A threaded rod passes through the surface of the pushing block, and the threaded rod is rotatably connected to the filter frame and threadedly connected to the pushing block.

[0017] The present invention has at least the following beneficial effects:

[0018] By providing a filter frame with an annular structure design at the water inlet of the main body, the filter screen and filter plate inside the filter frame rotate under the impact of the water flow, so that the water inlet with a limited diameter has a larger filter screen to filter the passing water flow, which can increase the service life of the filter screen and reduce the maintenance frequency. By setting a connecting component, the filter frame can be quickly installed and disassembled, thereby facilitating the replacement of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the water inlet and the filter assembly of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the filter frame of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the filter screen and the fan blades of the present invention;

[0023] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0024] Figure 6 It is a structural schematic diagram of the sliding ring and the docking port of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the belt and the rotating wheel of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the guide vane of the present invention.

[0027] In the figure: 1. pump body; 2. filter assembly; 20. filter frame; 21. cover plate; 22. plug interface; 23. cavity; 24. rotating ring; 25. filter plate; 26. guide vane; 27. connecting rod; 28. fan blade; 29. ​​impeller; 40. gear; 41. tooth groove; 42. belt; 3. connecting assembly; 30. push block; 31. threaded rod; 32. stopper; 33. sliding ring; 34. slider; 35. slide groove; 36. docking interface. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] See also Figure 1-8 The present invention provides a technical solution: a horizontal split multi-stage centrifugal pump, comprising a pump body 1, the front end of which is fixedly connected to a water inlet.

[0031] A filter assembly 2 is provided at the water inlet of the pump body 1. The filter assembly 2 includes a filter frame 20 designed as a circular ring. The filter frame 20 is inserted in the middle of the water inlet and is convenient for use and disassembly. The water inlet is divided into two parts by the filter frame 20. The liquid passing through the filter frame 20 is filtered by the filter plate 25 and the filter screen arranged inside. The filter screen covers the surface of the filter plate 25. The filter frame 20 and the filter screen are both larger than the area of ​​the water inlet, thereby increasing the service life of a single filter screen and reducing the replacement frequency.

[0032] The connecting component 3 includes a sliding ring 33 sliding inside the filter frame 20, and the sliding ring 33 is docked with the water inlet. The repulsive force generated between the sliding ring 33 and the water inlet resists the filter frame 20 at the water inlet, thereby increasing the stability of the filter frame 20.

[0033] A cavity 23 for placing the filter plate 25 is provided inside the filter plate 25. The filter plate 25 is circular in design, and a rotating ring 24 is fixedly connected to its annular outer surface. The rotating ring 24 rotates inside the cavity 23 through a bearing. One side outer surface of the filter frame 20 is rotatably connected to a cover plate 21 through a hinge. When water flows into the pump body 1 through the water inlet, the water flow drives the filter plate 25 to rotate. A filter screen or filter cotton is attached to the surface of the filter plate 25 for further filtration. Since the filter plate 25 rotates when the liquid flows, the liquid will contact the filter screen with a larger area. When the filter screen is replaced once, the filter screen has a longer working time, thereby avoiding frequent replacement of the filter screen.

[0034] The surface of the cover plate 21 is provided with an insertion port 22 which is docked with the water inlet, and a sealing rubber sleeve is provided at the surface of the insertion port 22 and the connection position of the insertion port 22. The insertion port 22 is arranged in the annular area of ​​the cover plate 21. The design of the cover plate 21 can open the cavity 23 inside the filter frame 20 when the filter frame 20 is taken out of the water inlet, and the filter attached to the surface of the filter plate 25 can be replaced.

[0035] A connecting rod 27 is fixedly connected to the position of the inner surface of the cavity 23 corresponding to the plug-in port 22, and a fan blade 28 driven by water flow is provided on the outer surface of the lower end of the connecting rod 27, and a rotating wheel 29 is fixedly connected to the end of the fan blade 28. The rotating wheel 29 and the connecting rod 27 are rotatably connected via a bearing, and the inner surface of the cavity 23 is rotatably connected to a gear 40 in contact with the inner side of the rotating ring 24 by rotation, and a tooth groove 41 meshing with the gear 40 is provided on the inner side of the rotating ring 24 at a position corresponding to the gear 40, and a belt 42 is sleeved between the gear 40 and the rotating wheel 29. The fan blade 28 is impacted by water flow, and the filter plate 25 is driven to rotate by the rotation of the fan blade 28. The fan blade 28 is arranged on a side close to the pump body 1, and relatively clean liquid can prevent dirt from being contaminated on the surface of the fan blade 28.

[0036] The diameter of the fan blade 28 is consistent with the plug port 22, so as to fully utilize the impact of the water flow.

[0037] The diameter of the rotating wheel 29 is greater than the diameter of the gear 40 , so the rotation speed of the filter plate 25 can be appropriately increased.

[0038] Embodiment 2

[0039] The surface of the filter plate 25 is provided with guide vanes 26 . The guide vanes 26 are provided in several groups and face the pump body 1 . The filter plate 25 is driven to rotate by a single guide vane 26 .

[0040] The connecting assembly 3 includes a docking port 36, and the docking port 36 and the plug port 22 are on the same axis. The sliding ring 33 slides inside the docking port 36, and a slider 34 is fixedly connected to the annular outer surface of the sliding ring 33 to provide guidance for the sliding ring 33. A sliding groove 35 is provided at the corresponding position of the docking port 36 and the slider 34. A sealing rubber pad is provided at the position where the sliding ring 33 contacts the water inlet. When installing the filter frame 20, the water inlet is inserted into the plug port 22 on the surface of the cover plate 21, and the position of the filter frame 20 is calibrated. Then, the sliding ring 33 is aligned with another opening of the water inlet, and the blocking block 32 is squeezed by the pushing block 30, so that the sliding ring 33 is docked with the water inlet. The above method can be used for rapid installation and disassembly.

[0041] A stopper 32 is fixedly connected to the annular outer surface of the sliding ring 33 near the upper end, and a pushing block 30 is provided at a position corresponding to the filter frame 20 and the stopper 32. The portion where the pushing block 30 contacts the stopper 32 is designed as an inclined structure, and the sliding ring and the water inlet are pushed to squeeze each other and maintain the seal through the downward movement of the pushing block 30. The pushing block 30 is designed as an L-shaped structure as a whole, and a threaded rod 31 passes through the surface of the pushing block 30. The threaded rod 31 is rotatably connected to the filter frame 20 and is threadedly connected to the pushing block 30. The threaded rod 31 can be controlled by a wrench, and a guide block for limiting its movement direction is provided on the surface of the pushing block 30, and the filter frame 20 is provided with a guide groove at its corresponding position to increase the stability of the movement.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal split multi-stage centrifugal pump, comprising a pump body (1), wherein the front end of the pump body (1) is fixedly connected with a water inlet, characterized in that: A filter assembly (2), the filter assembly (2) being arranged at the water inlet of the pump body (1), the filter assembly (2) comprising a filter frame (20) designed as a ring, the filter frame (20) being inserted in the middle of the water inlet, the filter plate (25) and the filter screen arranged inside filtering the liquid passing through the filter frame (20), the filter frame (20) and the filter screen being larger than the area of ​​the water inlet, thereby increasing the service life of a single filter screen and reducing the replacement frequency; A connection assembly (3), the connection assembly (3) comprising a sliding ring (33) sliding inside the filter frame (20), the sliding ring (33) docking with the water inlet, and a repulsive force generated between the sliding ring (33) and the water inlet to resist the filter frame (20) at the water inlet, thereby increasing the stability of the filter frame (20).

2. The horizontal split multistage centrifugal pump according to claim 1, characterized in that: The filter plate (25) has a cavity (23) for placing the filter plate (25) therein. The filter plate (25) is circular in design, and a rotating ring (24) is fixedly connected to its annular outer surface. The rotating ring (24) rotates inside the cavity (23) via a bearing. The outer surface of one side of the filter frame (20) is rotatably connected to a cover plate (21) via a hinge.

3. The horizontal split multistage centrifugal pump according to claim 2, characterized in that: The surface of the cover plate (21) is provided with an insertion port (22) that is docked with the water inlet, and a sealing rubber sleeve is provided at the connection position between the surface of the insertion port (22) and the insertion port (22), and the insertion port (22) is arranged in an annular area of ​​the cover plate (21).

4. The horizontal split multistage centrifugal pump according to claim 1, characterized in that: A connecting rod (27) is fixedly connected to a position of the inner surface of the cavity (23) corresponding to the plug interface (22); a fan blade (28) driven by water flow is provided on the outer surface of the lower end of the connecting rod (27); a rotating wheel (29) is fixedly connected to the end of the fan blade (28); the rotating wheel (29) and the connecting rod (27) are rotatably connected via a bearing; the inner surface of the cavity (23) is rotatably connected to a gear (40) in contact with the inner side of the rotating ring (24); a tooth groove (41) meshing with the gear (40) is provided on the inner side of the rotating ring (24) at a position corresponding to the gear (40); a belt (42) is sleeved between the gear (40) and the rotating wheel (29).

5. The horizontal split multistage centrifugal pump according to claim 4, characterized in that: The diameter of the fan blade (28) is consistent with the plug-in port (22).

6. The horizontal split multistage centrifugal pump according to claim 4, characterized in that: The diameter of the rotating wheel (29) is greater than the diameter of the gear (40).

7. The horizontal split multistage centrifugal pump according to claim 3, characterized in that: The surface of the filter plate (25) is provided with guide vanes (26), and the guide vanes (26) are provided in a plurality of groups and face the direction of the pump body (1).

8. The horizontal split multistage centrifugal pump according to claim 3, characterized in that: The connection assembly (3) comprises a docking port (36), the docking port (36) and the plug port (22) are on the same axis, the sliding ring (33) is located inside the docking port (36) and slides, the annular outer surface of the sliding ring (33) is fixedly connected with a slider (34) that provides guidance for the sliding ring (33), the docking port (36) and the slider (34) are provided with a sliding groove (35) at corresponding positions, and a sealing rubber pad is provided at the position where the sliding ring (33) contacts the water inlet.

9. The horizontal split multistage centrifugal pump according to claim 8, characterized in that: A stopper (32) is fixedly connected to a position near the upper end of the annular outer surface of the sliding ring (33); a pushing block (30) is provided at a position corresponding to the filter frame (20) and the stopper (32); the portion where the pushing block (30) contacts the stopper (32) is of an inclined structure; the pushing block (30) is of an L-shaped structure as a whole; a threaded rod (31) passes through the surface of the pushing block (30); the threaded rod (31) is rotatably connected to the filter frame (20) and is threadedly connected to the pushing block (30).

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