Gravel filtering structure of centrifugal pump

Abstract

The utility model provides a gravel filtering structure of a centrifugal pump and relates to the technical field of centrifugal pumps, the gravel filtering structure comprises a filtering assembly, a collecting frame and a centrifugal pump body, a movable notch is formed in the bottom of a water inlet, a release frame is connected to the outer portion of the water inlet in a sleeving mode, an annular groove is formed in the inner wall of the release frame, and a discharge opening is formed in the outer wall of the release frame; the interior of the discharge hole is communicated with the interior of the annular groove; the filter assembly comprises a guide filter screen which is in a circular truncated cone shape, and a collection filter frame is integrally formed at the narrow end of the guide filter screen; the releasing frame comprises a second retaining ring, and the top of the second retaining ring is connected with a first retaining ring. According to the technical scheme, when the collecting frame is blocked by means of the annular groove in the inner wall of the releasing frame, the discharging opening can rotate from the top to the bottom in the mode that the releasing frame is controlled to rotate outside the water inlet, so that the bottom of the collecting frame is supported to retreat from the interior of the discharging opening, and gravel concentrated in the collecting frame is convenient to clean and discharge.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, specifically a sand and gravel filtration structure for a centrifugal pump. Background Technology

[0002] Centrifugal pumps work by using the rotation of an impeller to cause water to move in a centrifugal motion. Before starting the pump, the pump casing and suction pipe must be filled with water. Then, the motor is started, and the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown towards the outer edge of the impeller, flowing into the pump's discharge pipe through the flow channel of the volute casing.

[0003] A centrifugal pump has eight basic components: impeller, pump body, pump cover, baffle ring, pump shaft, bearing, sealing ring, stuffing box, and axial force balancing device. Centrifugal pumps are widely used in industries such as power, metallurgy, coal, and building materials to transport slurries containing solid particles.

[0004] The patent document CN220365781U discloses a filtration structure for an end-suction centrifugal pump. This structure involves connecting an external pipeline to the outlet pipe and a first inlet pipe, then sealing the second inlet pipe with a sealing assembly. During operation, a motor drives an impeller to rotate. Water enters through the first inlet pipe and flows out through the outlet pipe under the impeller's action. As the water passes through the first inlet pipe, the filtration assembly filters it, reducing the amount of sand and gravel mixed in. This also reduces damage to the impeller caused by sand and gravel, thereby improving the centrifugal pump's efficiency.

[0005] However, in the process of implementing the above technical solution, the following technical problems were found:

[0006] The filter structure of this end-suction centrifugal pump reduces the amount of sand flowing through the impeller by filtering sand at the inlet. However, in actual applications, the amount of sand inside the filter structure increases over time. When cleaning is required, it is not easy to remove the filter structure from the centrifugal pump for cleaning, which can easily affect the flow rate of water through the filter structure when the centrifugal pump is working. Utility Model Content

[0007] To overcome the problem that existing end-suction centrifugal pump filtration structures accumulate sand and gravel over time during practical applications, making it difficult to remove the filtration structure for cleaning and potentially affecting the water flow velocity during subsequent pump operation, this application proposes a filtration assembly consisting of a collection filter frame and a guide filter screen installed inside the inlet. The collection frame passes through the movable slot on the inlet and is located inside the collection filter frame. A release frame is used to seal the bottom of the collection frame, allowing water to flow through the inside of the guide filter screen. This facilitates the retention of sand and gravel inside the guide filter screen and collection filter frame, and their concentration inside the collection frame.

[0008] Meanwhile, by using the annular groove on the inner wall of the release frame to seal the collection frame, the discharge port can be rotated from the top to the bottom by controlling the release frame to rotate outside the water inlet, thereby supporting the bottom of the collection frame to exit from the inside of the discharge port, making it easier to clean and discharge the sand and gravel concentrated inside the collection frame.

[0009] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0010] A sand and gravel filtration structure for a centrifugal pump includes a filter assembly, a collection frame, and a centrifugal pump body, wherein the collection frame is disposed inside one end of the filter assembly.

[0011] The centrifugal pump body has an integrally formed water inlet on one side, and a water outlet is formed tangentially at the edge of the centrifugal pump body. The bottom of the water inlet has a movable slot, and a release frame is connected to the outside of the water inlet in a sleeve-type manner. The inner wall of the release frame has an annular groove, and the outer wall of the release frame has a discharge port.

[0012] The filtration assembly includes a guide filter screen, which is frustum shaped and has a collection filter frame integrally formed at its narrow end.

[0013] The interior of the discharge port is connected to the interior of the annular groove. The collection frame is slidably connected to the interior of the collection filter frame. One end of the collection frame extends from the interior of the movable slot and is adapted to the inner wall of the annular groove. The release frame rotates outside the water inlet, so that the discharge port is switched from the top to the bottom, and the collection frame is movably connected to the interior of the discharge port.

[0014] In one possible implementation, a retaining ring is integrally formed at the wide end of the guide filter screen, the retaining ring being housed inside the end of the inlet away from the centrifugal pump body, and the surface of the retaining ring away from the guide filter screen is flush with the end face of the inlet.

[0015] In one possible implementation, the end of the collection filter frame away from the end connected to the guide filter screen is integrally formed with a support prism, the support prism being arc-shaped and its outer side fitting against the inner wall of the inlet.

[0016] In one possible implementation, the side of the collection frame and the collection filter rack away from the narrow end of the guide filter is processed into a filter screen, and the mesh size of the filter screen on the collection frame is larger than that on the guide filter screen, and the mesh size of the filter screen on the guide filter screen is the same as that on the guide filter screen.

[0017] In one possible implementation, water flows through the inside of the guide filter and exits through the inside of the guide filter and the collection frame, leaving sand and gravel inside the guide filter and the collection frame, where they are collected inside the collection frame with the continuously flowing water.

[0018] In one possible implementation, the release mechanism includes a second buckle with a first buckle mounted on top of the second buckle; the first and second buckles form a ring, and the discharge port is located at the center of the first buckle.

[0019] In one possible implementation, ribs are provided on the outer sides of both ends of the second buckle, and the inner surface of the ribs is in contact with the outer surface of the first buckle. The first buckle moves along the axial direction of the water inlet and is installed between the two ribs.

[0020] The beneficial effects of this application are as follows:

[0021] Firstly, in this solution, a filter assembly consisting of a collection filter frame and a guide filter screen is installed inside the water inlet. The collection frame passes through the movable slot on the water inlet and is located inside the collection filter frame. The release frame is used to seal the bottom of the collection frame, allowing water to flow through the inside of the guide filter screen. This facilitates the retention of sand and gravel inside the guide filter screen and the collection filter frame, and their concentration inside the collection frame.

[0022] Secondly, in this solution, when the collection frame is sealed by the annular groove on the inner wall of the release frame, the discharge port can be rotated from the top to the bottom by controlling the release frame to rotate outside the water inlet, thereby supporting the bottom of the collection frame to exit from the inside of the discharge port, which is convenient for cleaning and discharging the sand and gravel concentrated inside the collection frame.

[0023] Thirdly, in this solution, by using a release frame consisting of a first buckle, a second buckle, and ribs, when the first buckle moves along the axis of the inlet and is installed between the two ribs, the two ribs restrict the first buckle and the second buckle from moving away from each other, so that one end of the collection frame is located inside the ring groove, making it convenient to assemble and fix the first buckle and the second buckle and then fit them onto the outside of the inlet. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a cross-sectional view of the present invention;

[0026] Figure 3 This utility model Figure 2 Enlarged diagram of section A in the middle;

[0027] Figure 4 This is a schematic diagram of the diagonal brace structure of this utility model.

[0028] Reference numerals in the attached drawings: 1. Centrifugal pump body; 2. Outlet; 3. Inlet; 4. Filter assembly; 401. Guide filter screen; 402. Baffle ring; 403. Collection filter frame; 404. Support ribs; 5. Release frame; 501. First retaining ring; 502. Second retaining ring; 503. Rib; 6. Drainage port; 7. Collection frame; 8. Movable slot; 9. Ring groove. Detailed Implementation

[0029] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0030] Example 1:

[0031] This embodiment describes the specific structure of a sand and gravel filtration structure for a centrifugal pump, as detailed in the following reference. Figures 1-4 As shown, it includes a filter assembly 4, a collection frame 7 disposed inside one end of the filter assembly 4, and a centrifugal pump body 1. An inlet 3 is integrally formed on one side of the centrifugal pump body 1, and an outlet 2 is tangentially formed at the edge of the centrifugal pump body 1. A movable slot 8 is provided at the bottom of the inlet 3. A release frame 5 is sleeved to the outside of the inlet 3. An annular groove 9 is provided on the inner wall of the release frame 5, and a discharge port 6 is provided on the outer wall of the release frame 5.

[0032] The filter assembly 4 includes a guide filter 401, which is frustum shaped and has a collection filter frame 403 integrally formed at its narrow end.

[0033] The interior of the discharge port 6 is connected to the interior of the annular groove 9. By extending one end of the collection frame 7 from the interior of the movable slot 8 and fitting and connecting it to the inner wall of the annular groove 9, the bottom of the collection frame 7 can be sealed by the annular groove 9 on the release frame 5, thereby preventing a large amount of water leakage during the pumping process.

[0034] Secondly, by controlling the release frame 5 to rotate outside the inlet 3, the discharge port 6 is switched from the top to the bottom. With the collection frame 7 slidably connected to the inside of the collection filter frame 403, the collection frame 7 can be movably connected to the inside of the discharge port 6, thereby removing the collection frame 7 from the inside of the inlet 3 to clean the sand and gravel accumulated inside the collection frame 7.

[0035] Meanwhile, by processing the side of the collection frame 7 and the collection filter frame 403 away from the narrow end of the guide filter 401 into a filter screen, and the mesh size of the filter screen on the collection frame 7 is larger than that on the guide filter 401, and the mesh size of the filter screen on the guide filter 401 is the same as that on the guide filter 401, when water flows through the inside of the guide filter 401 and passes through the inside of the guide filter 401 and the collection filter frame 403, sand and gravel are left inside the guide filter 401 and the collection filter frame 403, and are concentrated inside the collection frame 7 with the continuously flowing water;

[0036] Furthermore, to facilitate the installation of the filter assembly 4 inside the water inlet 3, such as... Figure 2 As shown, a retaining ring 402 is integrally formed at the wide end of the guide filter 401. By storing the retaining ring 402 inside the end of the water inlet 3 away from the centrifugal pump body 1, and the surface of the retaining ring 402 away from the guide filter 401 is flush with the end face of the water inlet 3, it does not affect the assembly and fixation of the water inlet 3 and the pipeline.

[0037] Meanwhile, when the collection frame 7 is inserted into the inside of the collection filter frame 403 through the movable slot 8, the movement of the filter assembly 4 along the axis of the inlet 3 on the inside of the inlet 3 can be restricted, making it easier for the filter assembly 4 to be installed inside the inlet 3.

[0038] Furthermore, in order to improve the structural strength of the end of the collection filter 403 away from the guide filter 401, such as... Figure 2 and Figure 3 As shown, the end of the collecting filter frame 403 away from the end connected to the guide filter screen 401 is integrally formed with a support prism 404. By making the support prism 404 arc-shaped and its outer side fits against the inner wall of the inlet 3, the resistance strength between the collecting filter frame 403 and the inner wall area of ​​the inlet 3 can be improved during the process of guiding and collecting sand and gravel in the water flow using the guide filter screen 401 and the collecting filter frame 403.

[0039] The above design uses a filter assembly 4 consisting of a collection filter frame 403 and a guide filter screen 401 installed inside the inlet 3. The collection frame 7 passes through the movable slot 8 on the inlet 3 and is located inside the collection filter frame 403. The release frame 5 is used to seal the bottom of the collection frame 7. When water flows through the inside of the guide filter screen 401 and passes through the inside of the guide filter screen 401 and the collection filter frame 403, sand and gravel can be left inside the guide filter screen 401 and the collection filter frame 403 and collected inside the collection frame 7 with the continuously flowing water. It is simple and convenient.

[0040] Meanwhile, when the collection frame 7 is blocked by the annular groove 9 on the inner wall of the release frame 5, the discharge port 6 can be rotated from the top to the bottom by controlling the release frame 5 to rotate outside the water inlet 3, so that the bottom of the collection frame 7 can be removed from the inside of the discharge port 6, making it easier to clean and discharge the sand and gravel concentrated inside the collection frame 7.

[0041] Example 2:

[0042] Based on Example 1, this example describes the specific structure of the support rod assembly, such as... Figure 2 and Figure 4 As shown, the release rack 5 includes a second buckle 502, and the top of the second buckle 502 is assembled with a first buckle 501;

[0043] In this way, by forming a ring with the first buckle 501 and the second buckle 502, it is convenient to place one end of the collection frame 7 inside the ring groove 9 after the first buckle 501 and the second buckle 502 are assembled and fixed, and to seal one end of the collection frame 7 with the help of the annular inner wall of the ring groove 9.

[0044] Meanwhile, the discharge port 6 is located at the center of the first buckle 501. When the release frame 5 is rotated to switch the discharge port 6 to the bottom, the discharge port 6 can release the collection frame 7 and the sand and gravel in the collection frame 7 to the bottom, so as to achieve the effect of quickly cleaning up the sand and gravel.

[0045] Secondly, to facilitate control of the rotation of the release frame 5 outside the water inlet 3, such as Figure 4 As shown, the outer sides of both ends of the second buckle 502 are provided with ribs 503. By making the inner surface of the ribs 503 fit against the outer surface of the first buckle 501, when the first buckle 501 moves along the axial direction of the water inlet 3 and is installed between the two ribs 503, the two ribs 503 can be used to restrict the first buckle 501 and the second buckle 502 from moving away from each other.

[0046] The above design utilizes a release frame 5 composed of a first buckle 501, a second buckle 502, and ribs 503. When the first buckle 501 moves along the axial direction of the inlet 3 and is installed between the two ribs 503, the two ribs 503 restrict the first buckle 501 and the second buckle 502 from moving away from each other, so that one end of the collection frame 7 is located inside the annular groove 9. After the first buckle 501 and the second buckle 502 are assembled and fixed, the release frame 5 is restricted from moving outside the inlet 3 along its axial direction, maintaining only the function of rotation.

[0047] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A sand and gravel filtration structure for a centrifugal pump, characterized in that, include: Filtering component (4); A collection box (7) is located inside one end of the filter assembly (4); Centrifugal pump body (1); The centrifugal pump body (1) has an integrally formed inlet (3) on one side, and an outlet (2) is formed tangentially at the edge of the centrifugal pump body (1). The bottom of the inlet (3) is provided with a movable slot (8). The inlet (3) is connected to a release frame (5) in a sleeve-type manner. The inner wall of the release frame (5) is provided with an annular groove (9), and the outer wall of the release frame (5) is provided with a discharge port (6). The filter assembly (4) includes a guide filter (401), which is frustum shaped and has a collection filter frame (403) integrally formed at its narrow end; The interior of the drain port (6) is connected to the interior of the annular groove (9). The collection frame (7) is slidably connected to the interior of the collection filter frame (403). One end of the collection frame (7) extends out from the interior of the movable slot (8) and is adapted to the inner wall of the annular groove (9). The release frame (5) rotates outside the water inlet (3) to switch the drain port (6) from the top to the bottom, so that the collection frame (7) is movably connected to the interior of the drain port (6).

2. The sand and gravel filtration structure for a centrifugal pump as described in claim 1, characterized in that: The guide filter (401) has an integrally formed retaining ring (402) at the wide end. The retaining ring (402) is housed inside the end of the water inlet (3) away from the centrifugal pump body (1), and the surface of the retaining ring (402) away from the guide filter (401) is flush with the end face of the water inlet (3).

3. The sand and gravel filtration structure for a centrifugal pump as described in claim 1, characterized in that: The end of the collection filter frame (403) away from the end connected to the guide filter (401) is integrally formed with a support prism (404), which is arc-shaped and whose outer side is attached to the inner wall of the water inlet (3).

4. The sand and gravel filtration structure for a centrifugal pump as described in claim 1, characterized in that: The side of the collection frame (7) and the collection filter frame (403) away from the narrow end of the guide filter (401) is processed into a filter screen, and the mesh size of the filter screen on the collection frame (7) is larger than that on the guide filter (401). The mesh size of the filter screen on the guide filter (401) is the same as that on the guide filter (401).

5. The sand and gravel filtration structure for a centrifugal pump as described in claim 1, characterized in that: Water flows through the inside of the guide filter (401) and passes through the inside of the guide filter (401) and the collection filter frame (403), leaving sand and gravel inside the guide filter (401) and the collection filter frame (403), and collecting them inside the collection frame (7) with the continuously flowing water.

6. The sand and gravel filtration structure for a centrifugal pump as described in claim 1, characterized in that: The release frame (5) includes a second buckle (502), and the top of the second buckle (502) is assembled with a first buckle (501); The first buckle (501) and the second buckle (502) form a ring, and the discharge port (6) is located at the center of the first buckle (501).

7. The sand and gravel filtration structure for a centrifugal pump as described in claim 6, characterized in that: The outer sides of both ends of the second buckle (502) are provided with ribs (503). The inner surface of the ribs (503) is in contact with the outer surface of the first buckle (501). The first buckle (501) moves along the axial direction of the water inlet (3) and is installed between the two ribs (503).

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