Adjustable filtering structure at water inlet end of axial flow pump

Abstract

The utility model discloses an adjustable filtering structure at a water inlet end of an axial flow pump, which relates to the technical field of axial flow pumps and comprises a water pump body, a water inlet is fixedly mounted on the water pump body, a water pump shaft is rotatably mounted in the water pump body, an impeller is fixedly mounted on the water pump shaft, a positioning component is connected onto the water inlet, and a water outlet is connected onto the positioning component. The positioning assembly comprises a mounting base fixedly mounted on the water inlet, mounting cavities are formed in the upper end and the lower end of the mounting base, a water passing hole is formed in the middle of the mounting base, a cleaning scraper is arranged in the water passing hole, a filtering mechanism is mounted in the mounting base, and a sealing ring is arranged in the water passing hole. According to the adjustable filtering structure for the water inlet end of the axial flow pump, through cooperative use of the positioning assembly and the filtering mechanism, the filtering position of the strip-shaped filtering net can be adjusted, so that the unblocked strip-shaped filtering net part is moved to the water passing hole for filtering, the surface of the filtering net does not need to be cleaned after shutdown, and the water pumping efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of axial flow pump, concretely is adjustable filter structure of axial flow pump water inlet end. BACKGROUND

[0002] Axial flow pump is a kind of pump that relies on rotating impeller to generate force to liquid, and makes it along the axial direction transport.Axial flow pump's impeller is equipped with 2 to 7 blades, rotates in the circular tube pump shell, usually single-stage type is more, a few are made into double-stage type.Its flow range is large, and lift is generally below 20 meters, is suitable for low-lift, large-flow occasions, such as irrigation, drainage, dock drainage, water level regulation of canal ship lock, or used as large circulating water pump of power plant.

[0003] In order to ensure that axial flow pump can work normally and efficiently, avoid any possible damage, usually a filter screen is installed at its water inlet end.The main role of this filter screen is to intercept and filter out impurities in water to prevent these substances from entering the pump interior.However, with the passage of time, various impurities such as silt, leaves, plastic sheets and the like will gradually accumulate on the surface of the filter screen, and the accumulation of these impurities will significantly reduce the passing area of water flow, leading to increased water flow resistance, and further affecting the water pumping efficiency of the axial flow pump.

[0004] Therefore, in order to maintain the performance of the axial flow pump and prolong its service life, the user needs to clean and maintain the filter screen regularly.When cleaning work is carried out, the operation of the water pump must be stopped to ensure safety and the smooth progress of the cleaning work.However, this process inevitably interrupts the normal water pumping operation, thereby affecting the efficiency and continuity of the operation. SUMMARY

[0005] The utility model aims at providing adjustable filter structure of axial flow pump water inlet end to solve the problem that impurities will block the filter screen in the prior art.

[0006] To achieve the above object, the utility model provides the following technical scheme: adjustable filter structure of axial flow pump water inlet end, including water pump body, the water pump body is fixedly installed with water inlet, water pump shaft body is rotatably installed in the water pump body, the water pump shaft body is fixedly installed with impeller, the water inlet is connected with positioning assembly, the positioning assembly includes installation base fixedly installed on the water inlet, installation cavity is formed in the upper and lower ends of the installation base, a water passing hole is formed in the middle position of the installation base, a cleaning scraper is arranged in the water passing hole, and a filter mechanism is installed in the installation base.

[0007] Preferably, a sealing ring is arranged in the water passing hole, a filter screen sliding groove is formed in the installation base, and a butt joint pipe opening is arranged at the water passing hole of the installation base.

[0008] Preferably, a clamping groove is formed at the edge of the water passing hole, and the sealing ring is installed in the water passing hole through the clamping groove.

[0009] Preferably, the installation base is connected to the water inlet through the butt joint pipe, and the cleaning scraper is provided with positioning feet at both ends, and the cleaning scraper is installed in the water passing hole through the positioning feet.

[0010] Preferably, the filter mechanism comprises a first winding roller and a second winding roller which are rotatably installed in the installation chamber, a belt filter screen is arranged between the first winding roller and the second winding roller, movable shafts are fixedly installed on the first winding roller and the second winding roller, a protective cover is fixedly installed on one side of the installation base, a driving motor is fixedly installed at the upper end of the protective cover, a driving shaft is fixedly installed at the output end of the driving motor, bevel gears are fixedly installed on the driving shaft and the movable shafts, and the bevel gears are meshed together.

[0011] Preferably, bearings are arranged on the protective cover, the driving shaft is rotatably installed in the protective cover through the bearings, and a shaft coupling is arranged at the output end of the driving motor, and the driving shaft is fixedly installed at the output end of the driving motor through the shaft coupling.

[0012] Preferably, the first winding roller is rotatably installed in the installation chamber at the upper end of the installation base through the movable shaft, the second winding roller is rotatably installed in the installation chamber at the bottom of the installation base through the movable shaft, and the belt filter screen is slidably installed in the installation base through a filter screen sliding groove.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1. In the application, the driving action of the water pump shaft body makes the impeller rotate in the water pump body, thereby realizing water flow suction and passing through the water pump body. Before the water flow enters the water pump body, the belt filter screen arranged in the water passing hole can effectively filter the pumped water, so as to avoid impurities from invading the inside of the water pump body. Meanwhile, the end of the cleaning scraper can contact the surface of the belt filter screen during the movement of the belt filter screen, so as to remove the impurities on the surface of the belt filter screen.

[0015] 2. In the application, after the driving motor is started, it drives the driving shaft to rotate. Under the action of the bevel gears, the driving shaft further drives the movable shaft to rotate. The rotation of the movable shaft drives the first winding roller and the second winding roller to rotate. With the rotation of the first winding roller and the second winding roller, the belt filter screen is guided to move, thereby adjusting the filtering position of the belt filter screen. The unblocked part of the belt filter screen is moved to the water passing hole for filtering, so that the need for cleaning the surface of the filter screen during shutdown is avoided, and the water pumping efficiency is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the positioning component of this utility model;

[0019] Figure 4 This is a schematic diagram of the filtration mechanism of this utility model.

[0020] The following are the labeling elements in the diagram: 1. Pump body; 2. Inlet; 3. Pump shaft; 4. Impeller; 5. Positioning assembly; 501. Mounting base; 502. Mounting chamber; 503. Water passage hole; 504. Sealing ring; 505. Cleaning scraper; 506. Filter screen groove; 507. Connecting pipe; 6. Filtering mechanism; 601. First winding roller; 602. Strip filter screen; 603. Second winding roller; 604. Movable shaft; 605. Drive motor; 606. Protective cover; 607. Drive shaft; 608. Helical gear. Detailed Implementation

[0021] 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.

[0022] like Figure 1 and Figure 2 As shown, this utility model provides a technical solution for an adjustable filter structure at the inlet of an axial flow pump, including a pump body 1, an inlet 2 fixedly installed on the pump body 1, a pump shaft 3 rotatably installed inside the pump body 1, an impeller 4 fixedly installed on the pump shaft 3, a positioning component 5 connected to the inlet 2, and a filter mechanism 6 installed inside the mounting base 501. Through the cooperation of the positioning component 5 and the filter mechanism 6, the filter position of the strip filter 602 can be adjusted, so that the unblocked strip filter 602 part moves to the water passage hole 503 for filtration, without stopping the machine to clean the filter surface, thus improving the pumping efficiency.

[0023] like Figure 2 and Figure 3As shown, the positioning component 5 includes a mounting base 501 fixedly installed on the water inlet 2. The mounting base 501 has mounting chambers 502 at both the upper and lower ends. A water passage hole 503 is opened in the middle of the mounting base 501. A cleaning scraper 505 is provided in the water passage hole 503. A sealing ring 504 is provided in the water passage hole 503. A filter screen groove 506 is opened in the mounting base 501. A connecting pipe port 507 is provided at the water passage hole 503 on the mounting base 501. A slot is opened at the edge of the water passage hole 503. The sealing ring 504 is installed in the water passage hole 503 through the slot.

[0024] Specifically, when the pump shaft 3 begins to rotate, it effectively drives the impeller 4 to rotate inside the pump body 1. This rotational motion allows the pump to draw in water and pump it through the pump body 1. Before entering the pump body 1, the water flows through a water passage 503, which contains a strip filter 602. The strip filter 602 meticulously filters the pumped water, ensuring that no possible impurities enter the pump body 1. Furthermore, during the movement of the strip filter 602, the end of the cleaning scraper 505 comes into close contact with the surface of the strip filter 602. This contact helps to scrape away any impurities that may accumulate on the surface of the strip filter 602, thus keeping the strip filter 602 clean.

[0025] like Figure 2 and Figure 4 As shown, the filter mechanism 6 includes a first take-up roller 601 and a second take-up roller 603 rotatably mounted in the mounting chamber 502. A strip filter screen 602 is provided between the first take-up roller 601 and the second take-up roller 603. A movable shaft 604 is fixedly mounted on both the first take-up roller 601 and the second take-up roller 603. A protective cover 606 is fixedly mounted on one side of the mounting base 501. A drive motor 605 is fixedly mounted on the upper end of the protective cover 606. A drive shaft 607 is fixedly mounted on the output end of the drive motor 605. Helical gears 608 are fixedly mounted on both the drive shaft 607 and the movable shaft 604, and the helical gears 608 mesh together in pairs. A bearing is provided on the protective cover 606. The drive shaft 607 is rotatably mounted in the protective cover 606 through the bearing. A coupling is provided on the output end of the drive motor 605. The drive shaft 607 is fixedly mounted to the output end of the drive motor 605 through the coupling.

[0026] Specifically, when the drive motor 605 is started, it will drive the drive shaft 607 to rotate. As the drive shaft 607 rotates, the movable shaft 604 will also rotate under the synergistic effect of the helical gear 608. During the rotation of the movable shaft 604, it will further drive the first take-up roller 601 and the second take-up roller 603 to rotate together. With the rotation of the first take-up roller 601 and the second take-up roller 603, they will pull the strip filter screen 602 to move accordingly. Through this movement, the filtration position of the strip filter screen 602 can be effectively adjusted, allowing the unclogged portion of the strip filter screen 602 to move to the water passage 503 for filtration, eliminating the need to stop the machine to clean the filter screen surface and improving pumping efficiency.

[0027] Working principle: During use, the mounting base 501 can be installed on the inlet 2 of the water pump body 1 through the connecting pipe 507. The water pump shaft 3 drives the impeller 4 to rotate inside the water pump body 1, thereby attracting water flow through the water pump body 1. Before passing through the water pump body 1, the water flow passes through the strip filter 602 in the water passage hole 503, thereby filtering the pumped water and preventing impurities from entering the water pump body 1. When large impurities accumulate on the strip filter 602, the drive motor 605 can be started. After starting the drive motor 605, it will drive the drive shaft 607 to rotate. Under the action of the helical gear 608, the drive shaft 607... 07 will drive the movable shaft 604 to rotate. When the movable shaft 604 rotates, it will drive the first take-up roller 601 and the second take-up roller 603 to rotate. When the first take-up roller 601 and the second take-up roller 603 rotate, they will drive the strip filter screen 602 to move, thereby adjusting the filtration position of the strip filter screen 602. This allows the unblocked part of the strip filter screen 602 to move to the water passage hole 503 for filtration, eliminating the need to stop the machine to clean the filter screen surface and improving the water pumping efficiency. During the movement of the strip filter screen 602, the end of the cleaning scraper 505 will abut against the surface of the strip filter screen 602, thereby cleaning the impurities on the surface of the strip filter screen 602.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An adjustable filter structure for the inlet of an axial flow pump, comprising a pump body (1), an inlet (2) fixedly mounted on the pump body (1), a pump shaft (3) rotatably mounted inside the pump body (1), and an impeller (4) fixedly mounted on the pump shaft (3), characterized in that: The inlet (2) is connected to a positioning component (5). The positioning component (5) includes a mounting base (501) fixedly installed on the inlet (2). The mounting base (501) has mounting chambers (502) at both the upper and lower ends. A water passage hole (503) is opened in the middle of the mounting base (501). A cleaning scraper (505) is provided in the water passage hole (503). A filter mechanism (6) is installed in the mounting base (501).

2. The adjustable filter structure at the inlet of the axial flow pump according to claim 1, characterized in that: A sealing ring (504) is provided inside the water passage hole (503), a filter screen groove (506) is provided inside the mounting base (501), and a connecting pipe (507) is provided at the water passage hole (503) on the mounting base (501).

3. The adjustable filter structure at the inlet of the axial flow pump according to claim 2, characterized in that: A slot is provided at the edge of the water passage hole (503), and the sealing ring (504) is installed in the water passage hole (503) through the slot.

4. The adjustable filter structure at the inlet of the axial flow pump according to claim 3, characterized in that: The mounting base (501) is connected to the water inlet (2) through the connecting pipe (507). The cleaning scraper (505) is provided with positioning feet at both ends. The cleaning scraper (505) is installed in the water passage hole (503) through the positioning feet.

5. The adjustable filter structure at the inlet of the axial flow pump according to claim 4, characterized in that: The filtration mechanism (6) includes a first take-up roller (601) and a second take-up roller (603) rotatably mounted in the mounting chamber (502). A strip filter screen (602) is provided between the first take-up roller (601) and the second take-up roller (603). A movable shaft (604) is fixedly mounted on both the first take-up roller (601) and the second take-up roller (603). A protective cover (606) is fixedly mounted on one side of the mounting base (501). A drive motor (605) is fixedly mounted on the upper end of the protective cover (606). A drive shaft (607) is fixedly mounted on the output end of the drive motor (605). Helical gears (608) are fixedly mounted on both the drive shaft (607) and the movable shaft (604), and the helical gears (608) mesh together in pairs.

6. The adjustable filter structure at the inlet of the axial flow pump according to claim 5, characterized in that: The protective cover (606) is provided with a bearing, and the drive shaft (607) is rotatably installed inside the protective cover (606) through the bearing. The output end of the drive motor (605) is provided with a coupling, and the drive shaft (607) is fixedly installed at the output end of the drive motor (605) through the coupling.

7. The adjustable filter structure at the inlet of the axial flow pump according to claim 6, characterized in that: The first take-up roller (601) is rotatably mounted in the mounting chamber (502) at the upper end of the mounting base (501) via a movable shaft (604), the second take-up roller (603) is rotatably mounted in the mounting chamber (502) at the bottom of the mounting base (501) via a movable shaft (604), and the strip filter screen (602) is slidably mounted in the mounting base (501) via a filter screen groove (506).

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