Fluid pump and fluid conveying system

Abstract

The embodiment of the utility model relates to the technical field of fluid pumps, and particularly discloses a fluid pump and a fluid conveying system, the fluid pump comprises a pump body, an impeller and a driving piece, the pump body is provided with a containing cavity, a liquid inlet and a liquid outlet, the containing cavity is respectively communicated with the liquid inlet and the liquid outlet, and the impeller is arranged in the containing cavity. The side wall of the containing cavity is provided with a first arc section and a second arc section, the first arc section and the second arc section are connected in an end-to-end mode, and when the containing cavity is unfolded, the distance between the middle of the second arc section and the middle axial face of the containing cavity is larger than the distance between the two sides of the second arc section and the middle axial face of the containing cavity. The impeller is arranged in the containing cavity, the impeller abuts against the side wall, the driving piece is fixed to the pump body, the driving piece is fixed to the pump body, the driving piece is connected with the impeller, and the driving piece is used for rotation of the impeller. According to the embodiment of the utility model, the abrasion of the impeller can be reduced.

Description

Technical Field

[0001] Embodiments of the present utility model relate to the technical field of fluid pumps, and particularly to a fluid pump and a fluid delivery system. Background Art

[0002] A fluid pump is a positive displacement pump, and is commonly used in fields such as food, medicine, and chemical industry. The fluid pump includes a pump body, an impeller, and a driving member. The driving member drives the impeller to rotate in the pump body, so that the impeller bends and recovers to generate a volume change to suck, compress, and deliver a liquid.

[0003] However, in the process of implementing the embodiments of the present utility model, the inventor found that: currently, the pump body is provided with a receiving cavity, the side wall of the receiving cavity has a first arc section and a second arc section, the impeller is arranged in the receiving cavity, the impeller abuts against the side wall of the receiving cavity, when the impeller rotates, the impeller abuts against the first arc section and the second arc section in sequence, the impeller recovers at the first arc section, and the impeller bends at the second arc section, resulting in serious wear of the impeller during operation. Summary of the Utility Model

[0004] The main technical problem to be solved by the present utility model is to provide a fluid pump to solve the problem of serious wear of the impeller during operation.

[0005] To solve the above technical problem, a technical solution adopted by the present utility model is: to provide a fluid pump, including a pump body, an impeller, and a driving member, the pump body is provided with a receiving cavity, a liquid inlet, and a liquid outlet, the receiving cavity is respectively communicated with the liquid inlet and the liquid outlet, the side wall of the receiving cavity has a first arc section and a second arc section, the first arc section and the second arc section are connected end to end, when the receiving cavity is unfolded, the distance between the middle of the second arc section and the central plane of the receiving cavity is greater than the distance between the two sides of the second arc section and the central plane of the receiving cavity, the impeller is arranged in the receiving cavity, the impeller abuts against the side wall, the driving member is fixed to the pump body, the driving member is connected to the impeller, and the driving member is used for rotating the impeller.

[0006] Optionally, the impeller includes a hub and a plurality of blades, the hub is connected to the driving member, and the plurality of blades are spaced around and fixed to the hub, and the peripheral edge of the blade abuts against the side wall.

[0007] Optionally, the impeller is made of a flexible material.

[0008] Optionally, the pump body is provided with a through hole, and the through hole communicates with the receiving cavity;

[0009] The hub is provided with a shaft hole, and the output shaft of the driving member passes through the through hole and is inserted into the shaft hole.

[0010] Optionally, the fluid pump further includes a retaining ring disposed on the hub, and the retaining ring is sleeved on the output shaft of the driving member.

[0011] Optionally, the hub is provided with a receiving groove communicating with the shaft hole, and the receiving groove receives the retaining ring.

[0012] Optionally, the first wall of the accommodating cavity is a smooth surface, and the first wall abuts against one end of the impeller;

[0013] The fluid pump includes a gasket disposed in the accommodating cavity. The surface of the gasket facing the first wall of the accommodating cavity abuts against the other end of the impeller, and the surface of the gasket facing the first wall of the accommodating cavity is a smooth surface.

[0014] Optionally, the pump body includes a housing and a cover plate. The cover plate covers the housing, and the cover plate and the housing enclose the accommodating cavity.

[0015] Optionally, the fluid pump further includes a bracket connected to the pump body.

[0016] To solve the above technical problems, another technical solution adopted by the present utility model is: to provide a fluid delivery system including the above fluid pump.

[0017] In an embodiment of the present utility model, the fluid pump includes a pump body, an impeller and a driving member. The pump body is provided with an accommodating cavity, a liquid inlet and a liquid outlet. The accommodating cavity communicates with the liquid inlet and the liquid outlet respectively. The side wall of the accommodating cavity has a first arc section and a second arc section. The first arc section and the second arc section are connected end to end. When the accommodating cavity is unfolded, the distance between the middle of the second arc section and the central plane of the accommodating cavity is greater than the distance between the two sides of the second arc section and the central plane of the accommodating cavity. The impeller is disposed in the accommodating cavity, the impeller abuts against the side wall, the driving member is fixed to the pump body, the driving member is connected to the impeller, and the driving member is used for the impeller to rotate. Since the distance between the middle of the second arc section and the central plane of the accommodating cavity is greater than the distance between the two sides of the second arc section and the central plane of the accommodating cavity, the bending amount of the impeller when passing through the middle of the second arc section is smaller than the bending amount when passing through the two sides of the second arc section. Furthermore, stress release occurs when the impeller is at the middle of the second arc section, reducing the wear of the impeller. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of a fluid pump provided by an embodiment of the present utility model;

[0020] Figure 2 It is an exploded structural diagram of a fluid pump provided by an embodiment of the present utility model;

[0021] Figure 3 It is an exploded partial structural diagram of a fluid pump provided by an embodiment of the present utility model;

[0022] Figure 4 It is a left - view schematic diagram of a partial structure of a fluid pump provided by an embodiment of the present utility model;

[0023] Figure 5 It is a schematic structural diagram of an impeller of a fluid pump provided by an embodiment of the present utility model.

[0024] Explanation of reference numerals:

[0025] 100, fluid pump;

[0026] 1, pump body; 11, housing; 111, liquid inlet; 112, liquid outlet; 113, through - hole; 114, installation groove; 115, positioning block; 12, cover plate; 121, positioning port; 13, accommodating cavity; 131, first arc segment; 132, second arc segment; 1321, first pressing arc segment; 1322, second pressing arc segment; 1323, third pressing arc segment; 14, seal;

[0027] 2, impeller; 21, hub; 211, shaft hole; 212, receiving groove; 22, blade;

[0028] 3, driving member;

[0029] 4, washer;

[0030] 5, retaining ring;

[0031] 6, bracket. Detailed implementation manners

[0032] For the convenience of understanding the present utility model, the present utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "locked to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0033] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in this specification in the description of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0034] Please refer to Figures 1 - 3 , the fluid pump 100 includes a pump body 1, an impeller 2 and a driving member 3. The impeller 2 is disposed in the pump body 1 and can rotate relative to the pump body 1. The driving member 3 is fixed to the pump body 1, the driving member 3 is connected to the impeller 2, and the driving member 3 is used to drive the impeller 2 to rotate relative to the pump body 1 to suck and output fluid.

[0035] For the above pump body 1, please refer to Figure 3 and Figure 4 , the pump body 1 includes a housing 11 and a cover plate 12. The cover plate 12 covers the pump body 1, and the cover plate 12 and the housing 11 enclose a receiving cavity 13. The housing 11 is provided with a liquid inlet 111, a liquid outlet 112 and a through hole 113. Both the liquid inlet 111 and the liquid outlet 112 communicate with the receiving cavity 13. The through hole 113 is disposed at one end of the housing 11 away from the cover plate 12, and the through hole 113 communicates with the receiving cavity 13. The side wall of the receiving cavity 13 has a first arc segment 131 and a second arc segment 132. The first arc segment 131 and the second arc segment 132 are connected end to end. When the housing 11 is unfolded, the distance from the middle of the second arc segment 132 to the central plane of the receiving cavity 13 is greater than the distances from both sides of the second arc segment 132 to the central plane of the receiving cavity 13. Among them, the central plane of the receiving cavity 13 is parallel to the first arc segment 131 when the housing 11 is unfolded. The second arc segment 132 is used to cause the impeller 2 to bend. By making the distance from the middle of the second arc segment 132 to the central plane of the receiving cavity 13 greater than the distances from both sides of the second arc segment 132 to the central plane of the receiving cavity 13 when the receiving cavity 13 is unfolded, the bending amount of the impeller 2 when passing through the middle of the second arc segment 132 is less than the bending amount when passing through both sides of the second arc segment 132, thereby causing stress release of the impeller 2 when it is at the middle of the second arc segment 132, reducing the wear of the impeller 2 and reducing the frequency of impeller 2 replacement. The first wall of the receiving cavity 13, the side wall of the receiving cavity 13 and the second wall of the receiving cavity 13 are all smooth surfaces. The first wall of the receiving cavity 13 and the second wall of the receiving cavity 13 are oppositely arranged. The first wall of the receiving cavity 13 is connected to one end of the side wall of the receiving cavity 13, and the second wall of the receiving cavity 13 is connected to the other end of the side wall of the receiving cavity 13. The first wall of the receiving cavity 13 is the surface of the cover plate 12 facing the housing 11, that is, the surface of the cover plate 12 facing the housing 11 is a smooth surface.

[0036] The second arc segment 132 includes a first pressing arc segment 1321, a second pressing arc segment 1322, and a third pressing arc segment 1323. The first pressing arc segment 1321, the second pressing arc segment 1322, and the third pressing arc segment 1323 are connected in sequence. In other words, the first pressing arc segment 1321 is disposed on one side of the second arc segment 132, the second pressing arc segment 1322 is disposed in the middle of the second arc segment 132, and the third pressing arc segment 1323 is disposed on the other side of the second arc segment 132. When the housing 11 is unfolded, the distance between the second pressing arc segment 1322 and the central axis plane of the accommodating cavity 13 is greater than the distances between the first pressing arc segment 1321 and the third pressing arc segment 1323 and the central axis plane of the accommodating cavity 13 respectively. The second pressing arc segment 1322 is the section where the stress of the impeller 2 is released.

[0037] In some embodiments, referring to Figure 3 , to facilitate aligning the cover plate 12 with the housing 11 for installing the cover plate 12, the cover plate 12 is provided with a positioning opening 121, and the housing 11 is provided with a positioning block 115. The positioning block 115 is inserted into the positioning opening 121. The number of the positioning openings 121 and the number of the positioning blocks 115 are both two.

[0038] In some embodiments, referring to Figure 3 and Figure 4 , to seal the pump body 1, the pump body 1 further includes a seal 14. An installation groove 114 is provided on the surface of the housing 11 facing the cover plate 12. At least a part of the seal 14 is received in the installation groove 114, and the seal 14 abuts against the cover plate 12, thereby sealing the pump body 1.

[0039] For the above-mentioned impeller 2, referring to Figure 4 and Figure 5, the impeller 2 includes a hub 21 and a plurality of blades 22. One end of the hub 21 abuts against the first wall of the accommodation cavity 13, the other end of the hub 21 abuts against the second wall of the accommodation cavity 13, and the hub 21 is provided with a shaft hole 211. The plurality of blades 22 are fixedly arranged around the hub 21 at intervals, the peripheral edge of the blade 22 abuts against the side wall of the accommodation cavity 13, one end of the blade 22 abuts against the first wall of the accommodation cavity 13, and the other end of the blade 22 abuts against the second wall of the accommodation cavity 13, so that the impeller 2 divides the accommodation cavity 13 into a plurality of fluid cavities. When the impeller 2 rotates relative to the accommodation cavity 13, when the blade 22 passes through the second arc section 132, the blade 22 will bend, causing the volume of the fluid cavity to change. When the blade 22 flows through the first arc section 131, the blade 22 resumes, causing the volume of the fluid cavity to resume. Since when the housing 11 is unfolded, the distance between the second pressing arc section 1322 and the central axis plane of the accommodation cavity 13 is greater than the distances between the first pressing arc section 1321 and the third pressing arc section 1323 and the central axis plane of the accommodation cavity 13 respectively, when the blade 22 passes through the second pressing arc section 1322, stress release will occur on the blade 22. The first wall of the accommodation cavity 13, the side wall of the accommodation cavity 13, and the second wall of the accommodation cavity 13 are all smooth surfaces, which can reduce the friction force when the impeller 2 rotates, thereby reducing the wear of the impeller 2, providing the sealing performance of the fluid cavity, and reducing the flow resistance of the fluid in the accommodation cavity 13, so that the fluid can pass through the pump body 1 smoothly and continuously, avoiding turbulence or blockage.

[0040] In some embodiments, the impeller 2 is made of a flexible material, and the flexible material can be rubber, neoprene, silica gel, ethylene propylene rubber, nitrile rubber, etc.

[0041] In some embodiments, due to the difficulty in processing the smooth surface of the second wall of the accommodation cavity 13, the production cost is high. In order to reduce the production cost, the fluid pump 100 includes a gasket 4. The gasket 4 is arranged in the accommodation cavity 13, and the surface of the gasket 4 facing the first wall of the accommodation cavity 13 abuts against the other end of the hub 21 and the other end of the blade 22, so that the surface of the gasket 4 facing the first wall of the accommodation cavity 13 abuts against the other end of the impeller 2, and the periphery of the gasket 4 matches the side wall of the accommodation cavity 13.

[0042] For the above driving member 3, please refer to Figure 2 , the output shaft of the driving member 3 passes through the through hole 113 and is inserted into the shaft hole 211, so that the output shaft of the driving member 3 is connected to the hub 21, thereby driving the impeller 2 to rotate.

[0043] In some embodiments, please refer to Figure 2 , in order to prevent fluid from leaking between the through hole 113 and the output shaft of the driving member 3, the fluid pump 100 further includes a retaining ring 5. The hub 21 is provided with a receiving groove 212, and the receiving groove 212 communicates with the shaft hole 211. The retaining ring 5 is received in the receiving groove 212, and the retaining ring 5 is sleeved on the output shaft of the driving member 3.

[0044] In some embodiments, referring to Figure 1 and Figure 2 , for the convenience of fixing the fluid pump 100, the fluid pump 100 further includes a bracket 6, and the bracket 6 is connected to the pump body 1.

[0045] In the embodiment of the present utility model, the fluid pump 100 includes a pump body 1, an impeller 2 and a driving member 3. The pump body 1 is provided with a receiving cavity 13, a liquid inlet 111 and a liquid outlet 112. The receiving cavity 13 is respectively communicated with the liquid inlet 111 and the liquid outlet 112. The side wall of the receiving cavity 13 has a first arc segment 131 and a second arc segment 132. The first arc segment 131 and the second arc segment 132 are connected end to end. When the receiving cavity 13 is unfolded, the distance between the middle of the second arc segment 132 and the central plane of the receiving cavity 13 is greater than the distance between both sides of the second arc segment 132 and the central plane of the receiving cavity 13. The impeller 2 is arranged in the receiving cavity 13, the impeller 2 abuts against the side wall, the driving member 3 is fixed to the pump body 1, the driving member 3 is fixed to the pump body 1, the driving member 3 is connected to the impeller 2, and the driving member 3 is used for the impeller 2 to rotate. Since the distance between the middle of the second arc segment 132 and the central plane of the receiving cavity 13 is greater than the distance between both sides of the second arc segment 132 and the central plane of the receiving cavity 13, the bending amount of the impeller 2 when passing through the middle of the second arc segment 132 is less than the bending amount when passing through both sides of the second arc segment 132. Furthermore, stress release occurs when the impeller 2 is at the middle of the second arc segment 132, reducing the wear of the impeller 2.

[0046] The present utility model also provides an embodiment of a fluid delivery system. The fluid delivery system includes the above-mentioned fluid pump 100. For the structure and function of the fluid pump 100, reference can be made to the above embodiments, and details will not be repeated here.

[0047] It should be noted that the description and drawings of the present utility model give preferred embodiments of the present utility model. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not additional limitations to the content of the present utility model. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Moreover, the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the description of the present utility model; further, for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A fluid pump, characterized in that, Comprising: A pump body, provided with a receiving cavity, a liquid inlet and a liquid outlet, the receiving cavity is respectively communicated with the liquid inlet and the liquid outlet, the side wall of the receiving cavity has a first arc section and a second arc section, the first arc section and the second arc section are connected end to end, when the receiving cavity is unfolded, the distance between the middle of the second arc section and the central plane of the receiving cavity is greater than the distance between the two sides of the second arc section and the central plane of the receiving cavity; An impeller, arranged in the receiving cavity, the impeller abuts against the side wall; A driving member, fixed to the pump body, the driving member is fixed to the pump body, the driving member is connected to the impeller, and the driving member is used for the impeller to rotate.

2. The fluid pump according to claim 1, wherein The impeller includes a hub and a plurality of blades, the hub is connected to the driving member, and the plurality of blades are fixedly arranged around the hub at intervals, and the peripheral edge of the blade abuts against the side wall.

3. The fluid pump according to claim 2, wherein The impeller is made of a flexible material.

4. The fluid pump according to claim 2, wherein The pump body is provided with a through hole, and the through hole communicates with the receiving cavity; The hub is provided with a shaft hole, and the output shaft of the driving member passes through the through hole and is inserted into the shaft hole.

5. The fluid pump according to claim 4, wherein The fluid pump further includes a retaining ring, the retaining ring is arranged on the hub, and the retaining ring is sleeved on the output shaft of the driving member.

6. The fluid pump according to claim 5, wherein The hub is provided with a receiving groove, the receiving groove communicates with the shaft hole, and the receiving groove receives the retaining ring.

7. The fluid pump according to claim 6, wherein The first wall of the receiving cavity is a smooth surface, and the first wall abuts against one end of the impeller; The fluid pump includes a gasket, the gasket is arranged in the receiving cavity, the surface of the gasket facing the first wall of the receiving cavity abuts against the other end of the impeller, and the surface of the gasket facing the first wall of the receiving cavity is a smooth surface.

8. The fluid pump according to claim 1, wherein The pump body includes a housing and a cover plate, the cover plate covers the housing, and the cover plate and the housing enclose the receiving cavity.

9. The fluid pump according to any one of claims 1-8, wherein The fluid pump further includes a bracket, and the bracket is connected to the pump body.

10. A fluid delivery system, characterized in that, Including the fluid pump according to any one of claims 1-9.

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