Large-flow rotary shell self-priming pump without mechanical seal

Abstract

The utility model discloses a mechanical-seal-free large-flow rotating shell self-priming pump which comprises a power element, a rotating shell and a sealing element. The rotating shell assembly is connected with the output end of the power element, and the power element drives the rotating shell assembly to suck external water; a part of the liquid collecting pipe is arranged in the rotary shell assembly, and the liquid collecting pipe is used for discharging water in the rotary shell assembly; the filtering assembly is connected with the rotary shell assembly, and the filtering assembly is used for filtering impurities in external water. According to the large-flow rotating shell self-priming pump without the mechanical seal, a mechanical seal structure is not needed, the structure is simpler, and the large-flow water suction function can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of volute self-priming pumps, in particular to a volute self-priming pump with large flow rate and without mechanical seal. Background Art

[0002] The volute pump is a small flow and ultra-high head centrifugal pump. Since the volute pump has no disc loss, it has the highest efficiency among small flow and high head centrifugal pumps. The main structure of the volute pump consists of a volute, a ratio tube, a mechanical seal, a motor, etc. The water inlet of the volute pump is equipped with a mechanical seal.

[0003] The existing volute pump cannot be made into a large-diameter and large-flow volute pump due to the limitation of the diameter of the mechanical seal at the water inlet, because the outer side of the volute of the volute pump must be in the air and cannot run in the water. If the outer side of the volute of the volute pump runs in the water, it will cause a large disc hydraulic loss. The water inlet of the volute pump is on the center side of the volute. The water inlet cannot rotate and the volute is a rotating component, so a set of mechanical seal structures must be added to the water inlet of the volute pump to isolate the water at the water inlet and the air outside the volute. When the diameter of the mechanical seal is small, high-speed operation is no problem, but the friction pair of the static and dynamic rings of the mechanical seal will increase with the increase of the diameter of the mechanical seal, and the relative linear speed of the friction pair will also increase. When the diameter of the mechanical seal increases to a certain extent, the friction pair will wear quickly or generate high temperature, causing the mechanical seal to fail. Therefore, the volute pump cannot be made into a large-flow volute pump due to the limitation of the mechanical seal. Summary of the invention

[0004] According to an embodiment of the utility model, a large flow rate volute self-priming pump without mechanical seal is provided, comprising:

[0005] Power components;

[0006] The swirl shell assembly is connected to the output end of the power element, and the power element drives the swirl shell assembly to absorb external water;

[0007] A liquid collecting pipe, part of which is built into the swirl assembly, and the liquid collecting pipe discharges the water inside the swirl assembly;

[0008] The filter assembly is connected with the rotating shell assembly, and the filter assembly is used to filter impurities in external water.

[0009] Furthermore, the rotary shell assembly includes: a rotary shell and an impeller; a cavity is provided in the rotary shell; the impeller is provided in the cavity, and the impeller sleeve is provided on the output shaft of the power element.

[0010] Furthermore, one end of the liquid collecting pipe is communicated with the cavity, and the other end of the liquid collecting pipe is arranged outside the rotary shell.

[0011] Furthermore, the rotary shell includes a water suction pipe, which is connected to the cavity, and external water enters the cavity through the water suction pipe.

[0012] Furthermore, the filter assembly comprises: a filter screen, which is cylindrically sleeved on the water suction pipe and is used to filter the water flowing into the water suction pipe.

[0013] Furthermore, it also includes:

[0014] Axial flow blades are coaxially arranged with the impeller, and are located inside the water suction pipe. The axial flow blades are used to absorb external water.

[0015] Furthermore, it also includes: a connecting plate, which is arranged between the rotating shell and the power element, and is used to connect the rotating shell and the power element.

[0016] The large-flow volute self-priming pump without mechanical seal according to the embodiment of the utility model does not need to use a mechanical seal structure, has a simpler structure, and can achieve a large-flow water absorption function.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic structural diagram of a large flow volute self-priming pump without mechanical seal according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0020] First, combine Figure 1 A large flow volute self-priming pump without mechanical seal according to an embodiment of the utility model is described, and its application scenario is very wide.

[0021] like Figure 1 As shown, the mechanical seal-free large flow volute self-priming pump of the embodiment of the utility model comprises a power element 1, a volute assembly 2, a liquid collecting pipe 3 and a filter assembly 4.

[0022] Specifically, Figure 1 As shown, the swirl assembly 2 is connected to the output end of the power element 1, and the power element 1 drives the swirl assembly 2 to absorb external water; the liquid collecting pipe 3 is partially built into the swirl assembly 2, and the liquid collecting pipe 3 discharges the water inside the swirl assembly 2; the filter assembly 4 is connected to the swirl assembly 2, and the filter assembly 4 is used to filter impurities in the external water. The power element 1 in this embodiment is a motor.

[0023] The water inlet component of the traditional self-priming pump is inside the pump body, which requires that the water inlet must use a mechanical seal. Compared with the traditional self-priming pump, the present embodiment connects the water suction pipe 212 to the swirl shell 21, and the water sucked up by the water suction pipe 212 will enter the swirl shell 21, and then the water suction pipe 212 extends into the pool, which is equivalent to placing the traditional water inlet externally, so that the water suction pipe 212 can directly absorb water from the pool, and the diameter of the water suction pipe 212 can be made very large, so it can absorb more water, solving the problem that the traditional self-priming pump cannot be made into a large-caliber and large-flow due to the limitation of the diameter of the mechanical seal of the water inlet. At the same time, compared with the traditional self-priming pump, the structure of the large-flow swirl shell self-priming pump without mechanical seal in the present embodiment is simpler.

[0024] Further, if Figure 1 As shown, the swirl shell assembly 2 includes: a swirl shell 21 and an impeller 22 ; a cavity 211 is provided in the swirl shell 21 ; the impeller 22 is provided in the cavity 211 , and the impeller 22 is sleeved on the output shaft of the power element 1 .

[0025] Furthermore, one end of the collecting pipe 3 is connected to the cavity 211 , and the other end of the collecting pipe 3 is arranged outside the swirl shell 21 . The water sucked into the cavity 211 flows in from one end of the collecting pipe 3 and flows out from the other end of the collecting pipe 3 .

[0026] Further, if Figure 1 As shown, the rotary housing 21 includes a water suction pipe 212 , which is connected to the cavity 211 , and external water enters the cavity 211 through the water suction pipe 212 .

[0027] Further, if Figure 1 As shown, the filter assembly 4 includes: a filter screen 41, which is cylindrically sleeved on the water suction pipe 212 and is used to filter water flowing to the water suction pipe 212 to prevent debris from clogging the water suction pipe 212.

[0028] Further, if Figure 1 As shown, it also includes: an axial flow blade 5, which is coaxially arranged with the impeller 22, and is located inside the water suction pipe 212, and the axial flow blade 5 is used to absorb external water.

[0029] Further, if Figure 1 As shown, it also includes: a connecting plate 6, which is arranged between the rotating shell 21 and the power element 1, and is used to connect the rotating shell 21 and the power element 1.

[0030] When in use, the filter screen 41 is fixed in the pool, and the water suction pipe 212 extends into the filter screen 41. The motor is started, and the motor drives the impeller 22 to rotate, and at the same time drives the axial flow blades 5 to rotate, so that the water suction pipe 212 sucks the water filtered by the filter screen 41 into the cavity 211 in the swirl shell 21, and the water in the cavity 211 flows out from the liquid collecting pipe 3.

[0031] Above, refer to Figure 1 The invention describes a large flow rate volute self-priming pump without mechanical seal according to an embodiment of the utility model, which does not need to use a mechanical seal structure, has a simpler structure, and can achieve a large flow rate water absorption function.

[0032] It should be noted that, in this specification, the terms "include", "comprises" or any other variations 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. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A large flow volute self-priming pump without mechanical seal, characterized in that: Include: Power components; A swivel shell assembly, wherein the swivel shell assembly is connected to an output end of the power element, and the power element drives the swivel shell assembly to absorb external water; A liquid collecting pipe, part of which is built into the swirl shell assembly, and the liquid collecting pipe discharges water from the swirl shell assembly; A filter assembly is connected to the rotary shell assembly, and the filter assembly is used to filter impurities in external water.

2. The large flow volute self-priming pump without mechanical seal as claimed in claim 1, characterized in that: The rotary shell assembly comprises: a rotary shell and an impeller; a cavity is arranged in the rotary shell; the impeller is arranged in the cavity, and the impeller is sleeved on the output shaft of the power element.

3. The large flow volute self-priming pump without mechanical seal as claimed in claim 2, characterized in that: One end of the liquid collecting pipe is communicated with the cavity, and the other end of the liquid collecting pipe is arranged outside the rotary shell.

4. The large flow volute self-priming pump without mechanical seal as claimed in claim 2, characterized in that: The swirl shell comprises a water suction pipe, which is communicated with the cavity, and external water enters the cavity through the water suction pipe.

5. The large flow volute self-priming pump without mechanical seal as claimed in claim 4, characterized in that: The filter assembly comprises a filter screen, which is sleeved on the water suction pipe in a cylindrical shape and is used for filtering water flowing into the water suction pipe.

6. The large flow volute self-priming pump without mechanical seal as claimed in claim 4, characterized in that: It also includes: an axial flow blade, which is coaxially arranged with the impeller, the axial flow blade is located inside the water suction pipe, and the axial flow blade is used to absorb external water.

7. The large flow volute self-priming pump without mechanical seal as claimed in claim 2, characterized in that: It also includes: a connecting plate, which is arranged between the rotating shell and the power element, and is used to connect the rotating shell and the power element.

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