Screw pump

Abstract

A screw pump, comprising a pump body and a base for mounting the pump body. A water inlet and a water outlet are separately formed on the pump body; a driving mechanism is provided on the screw pump at the water outlet end; a transmission shaft connected to the driving mechanism is provided in the pump body; a screw rod is provided in the pump body; a universal joint is provided between the transmission shaft and the screw rod; a water inlet cavity is formed in the pump body, and the water inlet is communicated with the water inlet cavity; and a filter assembly capable of filtering impurities is provided at the water inlet, and the filter assembly consists of a filter screen for filtering non-metallic impurities in a water flow, a magnetic frame for filtering metallic impurities in the water flow, and a connecting frame for fixing the filter screen and the magnetic frame.

Description

A screw pump Technical Field

[0001] This invention belongs to the field of pumps and relates to a screw pump. Background Technology

[0002] Screw pumps are a type of rotary positive displacement pump. They transport liquids by relying on the meshing of a screw and a bushing to create volume changes in the suction and discharge chambers. When pumping water, the pump is placed at an angle in the water, so that the angle of the pump shaft is less than the angle of the helical blades. The lower end of the helical blades contacts the water. When the prime mover drives the pump shaft to rotate through a speed-changing device, water enters the blades, rises along the helical flow path, and flows out. The greatest advantages of screw pumps are their strong adaptability to media, stable flow rate, low pressure pulsation, and high self-priming capability—features that cannot be replaced by any other type of pump. Therefore, they are often used in field irrigation.

[0003] Because existing screw pumps used for irrigation have simple structures and do not have filtration structures, while impurities in the water flow can be divided into metallic impurities and non-metallic impurities, under long-term operation, metallic impurities will adhere to the inside of the screw pump and cause damage to some parts, while non-metallic impurities are easy to accumulate inside, resulting in low irrigation efficiency and short service life of the screw pump. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by providing a screw pump with improved filtration performance.

[0005] The objective of this invention can be achieved through the following technical solution: a screw pump, characterized in that the screw pump includes a pump body and a base for mounting the pump body, the pump head is respectively provided with an inlet and an outlet for water flow, a drive mechanism for driving the screw pump is provided on the screw pump at one end of the outlet, the pump body has a transmission shaft connected to the drive mechanism, the pump body is provided with a screw for water flow transportation, a universal joint is provided between the transmission shaft and the screw with both ends connected to one end of the screw and the transmission shaft respectively, the pump body has an inlet chamber for water flow to enter and store, the inlet is connected to the inlet chamber, a filter assembly for filtering impurities is provided at the inlet, and the filter assembly consists of a filter screen for filtering non-metallic impurities in the water flow, a magnetic frame for filtering metallic impurities in the water flow, and a connecting frame for the filter screen and the magnetic frame.

[0006] In the aforementioned screw pump, the magnetic skeleton is designed with a grid-like cylindrical structure, and a magnetic mesh for adsorbing and precipitating metal impurities is provided within the grid of the magnetic skeleton. The magnetic skeleton and the magnetic mesh are integrally formed.

[0007] In the aforementioned screw pump, the outer peripheral wall of one end of the connecting frame has an outwardly protruding convex ring portion for limiting the position. The connecting frame is connected to the inner wall of the pump body inlet by a thread, and a hand pull ring for easy disassembly is provided on one end face of the convex ring portion. A limiting ring groove for limiting the installation of the convex ring portion is provided on the outer peripheral wall at the pump body inlet.

[0008] In the aforementioned screw pump, a rubber sealing ring is provided between the bottom of the limiting ring groove and the bottom of the convex ring to enhance the sealing effect at the water inlet.

[0009] In the aforementioned screw pump, a mechanical oil seal is provided at one end of the water inlet chamber to prevent water from seeping into the drive mechanism.

[0010] Compared with existing technologies, this screw pump has the following advantages:

[0011] 1. This screw pump is equipped with a filter assembly at the pump body inlet. The filter assembly consists of a filter screen, a magnetic frame, and a connecting frame. This structure can effectively filter non-metallic and metallic impurities in the water flow inside the screw pump to purify the water flow and has a good filtration effect.

[0012] 2. The connecting frame in this screw pump is connected to the pump body by threads, and a hand pull ring is provided on the convex ring on the connecting frame, which facilitates the periodic cleaning of sediment and impurities in the filter assembly and makes disassembly and cleaning easy. Attached Figure Description

[0013] Figure 1 is a three-dimensional structural diagram of this screw pump.

[0014] Figure 2 is a schematic diagram of the half-section structure of this screw pump.

[0015] Figure 3 is a schematic diagram of the three-dimensional structure of the magnetic skeleton of this screw pump.

[0016] Figure 4 is a magnified schematic diagram of the structure at point A in Figure 2.

[0017] In the diagram, 1. Pump body; 2. Base; 3. Drive shaft; 4. Screw; 5. Universal joint; 6. Inlet; 7. Outlet; 8. Inlet chamber; 9. Filter screen; 10. Magnetic frame; 11. Connecting frame; 12. Magnetic mesh; 13. Raised ring; 14. Hand pull ring; 15. Limiting ring groove; 16. Rubber sealing ring; 17. Mechanical oil seal. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] As shown in Figures 1, 2, 3, and 4, this screw pump includes a pump body 1 and a base 2 for mounting the pump body 1. The pump head has an inlet 6 and an outlet 7 for water flow. A drive mechanism for driving the screw pump is located at one end of the screw pump at the outlet 7. The pump body 1 contains a transmission shaft 3 connected to the drive mechanism. A screw 4 for water transport is located inside the pump body 1. A universal joint 5 is located between the transmission shaft 3 and the screw 4, with both ends connected to one end of the screw 4 and the transmission shaft 3, respectively. The pump body 1 has an inlet chamber 8 for water flow entry and storage. The inlet 6 is connected to the inlet chamber 8. A filter for filtering impurities is located at the inlet 6. The filter assembly consists of a filter screen 9 for filtering non-metallic impurities in the water flow, a magnetic frame 10 for filtering metallic impurities in the water flow, and a connecting frame 11 for the filter screen 9 and the magnetic frame 10. Water flows into the pump body 1 through the inlet 6. The magnetic frame 10 and the magnetic screen 12 can effectively adsorb metallic impurities in the water flow onto the magnetic screen 12 and the magnetic frame 10, effectively filtering metallic impurities in the water flow, greatly reducing metallic impurities in the water flow, and preventing the problem of damage to parts caused by metallic impurities settling in the pump body 1. At the same time, the filter screen 9 is used to filter non-metallic impurities in the water flow, effectively achieving the filtration of both metallic and non-metallic impurities.

[0020] To elaborate further, the magnetic skeleton 10 has a grid-like cylindrical structure design, and a magnetic mesh 12 for adsorbing and precipitating metal impurities is set inside the grid of the magnetic skeleton 10. The magnetic skeleton 10 and the magnetic mesh 12 are integrally molded structures.

[0021] To elaborate further, the outer peripheral wall of one end of the connecting frame 11 has an outwardly protruding ring portion 13 for limiting the position. The connecting frame 11 is connected to the inner wall of the pump body 1 inlet 6 by threads. A hand pull ring 14 for easy disassembly is provided on one end face of the ring portion 13. A limiting ring groove 15 for limiting the installation of the ring portion 13 is provided on the outer peripheral wall of the pump body 1 inlet 6. The hand pull ring 14 can effectively facilitate manual installation and disassembly, and facilitate regular cleaning of impurities in the filter assembly, thereby improving the service life and filtration effect of the filter assembly.

[0022] To elaborate further, a rubber sealing ring 16 is provided between the bottom of the limiting ring groove 15 and the bottom of the convex ring part 13 to enhance the sealing effect of the water inlet 6.

[0023] To elaborate further, a mechanical oil seal 17 is provided at one end of the water inlet chamber 8 to prevent water from seeping into the drive mechanism.

[0024] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A screw pump, characterized in that, The screw pump includes a pump body (1) and a base (2) for mounting the pump body (1). The pump head is provided with an inlet (6) and an outlet (7) for water flow. A drive mechanism for driving the screw pump is provided on one end of the screw pump at the outlet (7). The pump body (1) has a transmission shaft (3) connected to the drive mechanism. The pump body (1) is provided with a screw (4) for water flow transportation. A shaft with two ends connected to the screw is provided between the transmission shaft (3) and the screw (4). (4) A universal joint (5) is connected to one end of the drive shaft (3). The pump body (1) has an inlet chamber (8) for water to enter and store. The inlet (6) is connected to the inlet chamber (8). A filter assembly for filtering impurities is provided at the inlet (6). The filter assembly consists of a filter screen (9) for filtering non-metallic impurities in the water flow, a magnetic frame (10) for filtering metallic impurities in the water flow, and a connecting frame (11) for the filter screen (9) and the magnetic frame (10).

2. A screw pump according to claim 1, characterized in that, The magnetic skeleton (10) is designed with a grid-like cylindrical structure. A magnetic mesh (12) for adsorbing and precipitating metal impurities is provided inside the grid of the magnetic skeleton (10). The magnetic skeleton (10) and the magnetic mesh (12) are designed as an integral structure.

3. A screw pump according to claim 1, characterized in that, The connecting frame (11) has an outwardly protruding ring (13) on one end of its outer peripheral wall for limiting the position. The connecting frame (11) is connected to the inner wall of the pump body (1) inlet (6) by threads. A hand pull ring (14) for easy disassembly is provided on one end face of the ring (13). A limiting ring groove (15) for limiting the installation of the ring (13) is provided on the outer peripheral wall of the pump body (1) inlet (6).

4. A screw pump according to claim 3, characterized in that, A rubber sealing ring (16) is provided between the bottom of the limiting ring groove (15) and the bottom of the convex ring (13) to enhance the sealing effect at the water inlet (6).

5. A screw pump according to claim 1, characterized in that, A mechanical oil seal (17) is provided at one end of the water inlet cavity (8) to prevent water from seeping into the drive mechanism.

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