Water inlet filtering structure of axial flow water pump

Abstract

The utility model provides a water inlet filtering structure of an axial flow water pump, and belongs to the technical field of water pumps. The problem that a filter screen of an existing pump is inconvenient to disassemble and assemble is solved. The axial flow water pump comprises a tubular pump shell, a water inlet is formed in the front end of the pump shell, a filtering structure comprises a round sleeve body connected to the front end of the pump shell in a sleeved mode, a filtering net used for covering a front end opening of the round sleeve body is fixed to the front end of the round sleeve body, a positioning sleeve is further arranged and fixed to the front end of the pump shell in a sleeved mode, and the axial section of the positioning sleeve is in an L shape. An annular groove matched with the circular sleeve body is formed between the inner wall of the positioning sleeve and the outer wall of the pump shell, and the rear end of the circular sleeve body is clamped in the annular groove; two abdicating notches radially penetrate through the side wall of the front end of the positioning sleeve and are symmetrically arranged, connecting rods are arranged in the two abdicating notches and extend in the radial direction of the positioning sleeve, one end of each connecting rod is fixedly connected with the circular sleeve body, and the other end of each connecting rod penetrates through the corresponding abdicating notch. The filter screen is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to an axial flow water pump, in particular to an axial flow water pump water inlet filtering structure. Background Art

[0002] An axial flow water pump is a centrifugal pump that guides the fluid to flow within the impeller and the closed sliding tube through axial flow, and outputs the impeller rotational power to the fluid.

[0003] An existing axial flow water pump, such as an anti-clogging axial flow pump disclosed in the China Patent Library (application number: 2017111317038), includes a first pump casing and a second pump casing connected to the first pump casing, the second pump casing is arranged above the first pump casing, the bottom of the first pump casing is provided with a water inlet bell mouth, the upper part is provided with a water outlet elbow, the water inlet bell mouth is provided with a filter screen, a power device is arranged inside the second pump casing, the power device is connected to the drive shaft, the drive shaft passes through the first pump casing and extends downward along the axial center of the first pump casing, the lower part of the drive shaft is provided with a guide vane and an impeller, the bottom lower end of the drive shaft is connected with a connecting rod, the connecting rod passes through the filter screen to connect a brush, the brush is against the bottom surface of the filter screen, and the length of the brush is equal to the radius of the filter screen.

[0004] The above-mentioned axial flow pump cleans the filter by means of a brush arranged on the outside of the filter, but in actual use, the brush cannot deeply clean the mesh of the filter, so the filter still needs to be removed for cleaning. However, currently the filter is generally fixed by welding or multiple screws, which makes it inconvenient to disassemble and assemble the filter. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes an axial flow water pump water inlet filtering structure which is convenient for disassembly and assembly of the filter screen.

[0006] The purpose of the utility model can be achieved through the following technical solutions: an axial flow water pump water inlet filtering structure, the axial flow water pump includes a tubular pump casing, and the front end of the pump casing is a water inlet, the filtering structure includes a circular sleeve body sleeved on the front end of the pump casing, and a filter screen for covering the front port of the circular sleeve body is fixed at the front end of the circular sleeve body, characterized in that a positioning sleeve is also sleeved and fixed at the front end of the pump casing, the axial cross-section of the positioning sleeve is L-shaped, a circular annular groove matching the circular sleeve body is formed between the inner wall of the positioning sleeve and the outer wall of the pump casing, and the rear end of the circular sleeve body is clamped in the circular annular groove; a radial clearance notch is penetrated on the front end side wall of the positioning sleeve, there are two clearance notches and they are symmetrically arranged, connecting rods are arranged in the two clearance notches, and the length of the connecting rod extends radially along the positioning sleeve, one end of the connecting rod is fixedly connected to the above-mentioned circular sleeve body, and the other end of the connecting rod passes through the corresponding clearance notch.

[0007] With the cooperation of the circular sleeve, the positioning sleeve and the connecting rod, the filter installation and positioning can be completed by simply pressing the circular sleeve into the circular groove, and the filter can be removed by holding the connecting rod and pulling the circular sleeve outward. In actual use, the filter disassembly and assembly can be completed by only pressing the circular sleeve or pulling the connecting rod outward. The whole process has very few steps, which effectively and conveniently disassembles and assembles the filter.

[0008] In the above-mentioned axial flow water pump water inlet filter structure, the axial cross-section of the above-mentioned circular sleeve body is L-shaped, and the inner side of the front end surface of the circular sleeve body is pressed against the edge of the water inlet to limit the installation position of the circular sleeve body so that the circular sleeve body can be installed in place at one time. This not only facilitates the installation of the circular sleeve body, but also reduces the requirements for the installation position accuracy of the positioning sleeve, and facilitates processing and assembly.

[0009] In the above-mentioned axial flow water pump water inlet filter structure, the positioning sleeve is welded and fixedly connected to the front end of the pump casing.

[0010] In the above-mentioned axial flow water pump water inlet filter structure, a limiting structure for limiting the backward movement distance of the positioning sleeve is provided between the positioning sleeve and the pump housing, so that the positioning sleeve can be moved into place at one time, which is convenient for assembly.

[0011] In the above-mentioned axial flow water pump water inlet filter structure, the limiting structure includes an annular step arranged on the outer wall of the front end of the pump housing, and the annular step is composed of an annular side wall and an annular bottom wall, the rear end surface of the positioning sleeve is pressed on the annular bottom wall, and the above-mentioned annular groove is formed between the inner wall of the positioning sleeve and the annular side wall. The above-mentioned design has the advantages of simple structure and convenient processing.

[0012] In the above-mentioned axial flow water pump water inlet filter structure, the annular bottom wall is in a tapered shape with a diameter gradually increasing from front to back, and an annular welding groove is formed between the annular bottom wall and the rear end surface of the positioning sleeve. When in use, the welding liquid is evenly filled in the welding groove to enhance the positioning strength of the positioning sleeve, thereby improving the stability of the filtering structure.

[0013] In the above-mentioned axial flow water pump water inlet filtration structure, a socket matching the connecting rod is radially opened on the outer wall of the circular sleeve, and the adjacent ends of the two connecting rods are respectively clamped in the two sockets to realize a detachable connection between the connecting rod and the circular sleeve. While making it convenient to pull out the circular sleeve, the connecting rod and the circular sleeve can be separated to adapt to different working conditions.

[0014] In the above-mentioned axial flow water pump water inlet filter structure, the filter screen is in the shape of a circular plate coaxial with the circular sleeve body, and the filter screen is attached to and fixed on the front end surface of the circular sleeve body, so as to facilitate the cleaning of the filter screen.

[0015] In the above-mentioned axial flow water pump water inlet filter structure, the diameter of the connecting rod is slightly smaller than the width of the clearance gap, so that the connecting rod and the clearance gap cooperate to limit the circumferential rotation of the positioning sleeve, further enhancing the stability of the filtering structure.

[0016] Compared with the prior art, the axial flow water pump water inlet filtration structure has the following advantages:

[0017] With the cooperation of the circular sleeve, the positioning sleeve and the connecting rod, the filter installation and positioning can be completed by simply pressing the circular sleeve into the circular groove, and the filter can be removed by holding the connecting rod and pulling the circular sleeve outward. In actual use, the filter disassembly and assembly can be completed by only pressing the circular sleeve or pulling the connecting rod outward. The whole process has very few steps, which effectively and conveniently disassembles and assembles the filter.

[0018] 2. The pull rod is positioned by inserting the end into the socket on the outer wall of the round sleeve body, so that the connecting rod and the round sleeve body can be detachably connected. On the premise of conveniently pulling out the round sleeve body, the connecting rod and the round sleeve body can be separated to adapt to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of an axial flow water pump.

[0020] Figure 2 It is a three-dimensional schematic diagram of the water inlet filtration structure.

[0021] Figure 3 It is a cross-sectional schematic diagram of the water inlet filtration structure.

[0022] Figure 4 yes Figure 3 A magnified schematic diagram of center A.

[0023] In the figure, 1, pump casing; 2, circular sleeve body; 3, filter screen; 4, positioning sleeve; 4a, clearance gap; 5, circular ring groove; 6, connecting rod; 7, welding groove. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 As shown, the axial flow water pump comprises a tubular pump casing 1, the front end of the pump casing 1 is in the shape of a circular tube, and the front end of the pump casing 1 is the water inlet of the water pump.

[0026] like Figure 2 and Figure 3As shown in the figure, the inlet filtration structure of this axial flow pump includes a circular sleeve body 2 sleeved on the front end of the pump casing 1, and the circular sleeve body 2 and the front end of the pump casing 1 are in contact and cooperate through the circumferential surface. A filter screen 3 for covering the front port of the circular sleeve body 2 is fixed at the front end of the circular sleeve body 2. A positioning sleeve 4 is also sleeved and fixed on the front end of the pump casing 1. The axial section of the positioning sleeve 4 is L-shaped. A circular ring groove 5 matching the circular sleeve body 2 is formed between the inner wall of the positioning sleeve 4 and the outer wall of the pump casing 1. The axial section of the circular ring groove 5 is U-shaped, and the rear end of the circular sleeve body 2 is clamped in the circular ring groove 5. A让位缺口 4a is radially penetrated on the front side wall of the positioning sleeve 4. There are two让位缺口 4a and they are symmetrically arranged. That is, at this time, the two让位缺口 4a are evenly distributed along the circumferential direction of the positioning sleeve 4. Connecting rods 6 are arranged in both让位缺口 4a, and the length of the connecting rods 6 extends along the radial direction of the positioning sleeve 4. One end of the connecting rod 6 is fixedly connected to the above-mentioned circular sleeve body 2, and the other end of the connecting rod 6 passes through the corresponding让位缺口 4a.

[0027] With the cooperation of the circular sleeve body 2, the positioning sleeve 4 and the connecting rod 6, only by pressing the circular sleeve body 2 into the circular ring groove 5 with force can the installation and positioning of the filter screen 3 be completed. And by holding the connecting rod 6 and pulling the circular sleeve body 2 outward with force, the filter screen 3 can be removed. So in actual use, only by pressing the circular sleeve body 2 or pulling the connecting rod 6 outward can the disassembly and assembly of the filter screen 3 be completed. The whole process has very few steps, effectively facilitating the disassembly and assembly of the filter screen 3.

[0028] Furthermore, the axial section of the circular sleeve body 2 is L-shaped, and the inner side of the front end face of the circular sleeve body 2 is pressed against the edge of the water inlet to limit the installation position of the circular sleeve body 2, so that the circular sleeve body 2 can be installed in place at one time. This not only facilitates the installation of the circular sleeve body 2, but also reduces the requirement for the installation position accuracy of the positioning sleeve 4, facilitating processing and assembly.

[0029] In this embodiment,

[0030] Such as Figure 3 and Figure 4 As shown in the figure, the positioning sleeve 4 is fixedly connected to the front end of the pump casing 1 by welding, and a limiting structure for limiting the rearward movement distance of the positioning sleeve 4 is provided between the positioning sleeve 4 and the pump casing 1, so that the positioning sleeve 4 can be moved in place at one time, which is beneficial to assembly. Specifically, the limiting structure includes an annular step provided on the outer wall of the front end of the pump casing 1, and the annular step is coaxially arranged with the front end of the pump casing 1. The annular step is composed of an annular side wall and an annular bottom wall. The rear end face of the positioning sleeve 4 is pressed against the annular bottom wall, and the above-mentioned circular ring groove 5 is formed between the inner wall of the positioning sleeve 4 and the annular side wall. Furthermore, the annular bottom wall is conical with a diameter gradually increasing from front to back, and a welding groove 7 in the shape of a ring is formed between the annular bottom wall and the rear end face of the positioning sleeve 4. During use, the welding liquid is evenly filled in the welding groove 7 to strengthen the positioning strength of the positioning sleeve 4, thereby improving the stability of this filtration structure.

[0031] The connection method of the connecting rod 6 and the positioning sleeve 4 is as follows: a socket matching the connecting rod 6 is radially opened on the outer side wall of the circular sleeve body 2, and the adjacent ends of the two connecting rods 6 are respectively clamped in the two sockets, so that the connecting rod 6 and the circular sleeve body 2 can be detachably connected. On the premise of conveniently pulling out the circular sleeve body 2, the connecting rod 6 and the circular sleeve body 2 can be separated to adapt to different working conditions.

[0032] The connection between the filter screen 3 and the circular sleeve body 2 is as follows: the filter screen 3 is in the shape of a circular plate coaxial with the circular sleeve body 2, and the filter screen 3 is attached to and fixed on the front end surface of the circular sleeve body 2, which is convenient for cleaning the filter screen 3. Preferably, the filter screen 3 is fixedly connected to the circular sleeve body 2 by welding.

[0033] In actual products, the diameter of the connecting rod 6 is slightly smaller than the width of the clearance notch 4a, so that the connecting rod 6 and the clearance notch 4a cooperate to limit the circumferential rotation of the positioning sleeve 4, further enhancing the stability of the filtering structure.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An axial flow water pump water inlet filter structure, the axial flow water pump comprising a tubular pump housing (1), wherein the front end of the pump housing (1) is a water inlet, the filter structure comprising a circular sleeve (2) sleeved on the front end of the pump housing (1), a filter screen (3) for covering the front end of the circular sleeve (2) being fixed on the front end of the circular sleeve (2), characterized in that: A positioning sleeve (4) is also sleeved and fixed on the front end of the pump housing (1). The axial cross-section of the positioning sleeve (4) is L-shaped. A circular groove (5) matching the circular sleeve body (2) is formed between the inner wall of the positioning sleeve (4) and the outer wall of the pump housing (1), and the rear end of the circular sleeve body (2) is clamped in the circular groove (5). A radial clearance notch (4a) is penetrated through the front end side wall of the positioning sleeve (4). There are two clearance notches (4a) and they are symmetrically arranged. Connecting rods (6) are arranged in the two clearance notches (4a). The length of the connecting rods (6) extends radially along the positioning sleeve (4). One end of the connecting rod (6) is fixedly connected to the circular sleeve body (2), and the other end of the connecting rod (6) passes through the corresponding clearance notch (4a).

2. The axial flow water pump water inlet filter structure according to claim 1, characterized in that: The axial cross section of the circular sleeve body (2) is L-shaped, and the inner side of the front end surface of the circular sleeve body (2) is pressed against the edge of the water inlet.

3. The axial flow water pump water inlet filter structure according to claim 1 or 2, characterized in that: The positioning sleeve (4) is welded and fixedly connected to the front end of the pump casing (1).

4. The axial flow water pump water inlet filter structure according to claim 3, characterized in that: A limiting structure for limiting the backward movement distance of the positioning sleeve (4) is provided between the positioning sleeve (4) and the pump housing (1).

5. The axial flow water pump water inlet filter structure according to claim 4, characterized in that: The limiting structure comprises an annular step arranged on the front end outer wall of the pump housing (1), and the annular step is composed of an annular side wall and an annular bottom wall. The rear end surface of the positioning sleeve (4) is pressed on the annular bottom wall, and the above-mentioned annular groove (5) is formed between the inner wall of the positioning sleeve (4) and the annular side wall.

6. The axial flow water pump water inlet filter structure according to claim 5, characterized in that: The annular bottom wall is in a tapered shape with a diameter that gradually increases from front to back, and an annular welding groove (7) is formed between the annular bottom wall and the rear end surface of the positioning sleeve (4).

7. The axial flow water pump water inlet filter structure according to claim 1, characterized in that: An insertion hole matching the connecting rod (6) is radially opened on the outer side wall of the circular sleeve body (2), and adjacent ends of the two connecting rods (6) are respectively clamped in the two insertion holes.

8. The axial flow water pump water inlet filter structure according to claim 2, characterized in that: The filter screen (3) is in the shape of a circular plate coaxial with the circular sleeve body (2), and the filter screen (3) is abutted against and fixed on the front end surface of the circular sleeve body (2).

9. The axial flow water pump water inlet filter structure according to claim 1, characterized in that: The diameter of the connecting rod (6) is slightly smaller than the width of the clearance gap (4a).

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