Miniature electromagnetic pump with high efficiency sealing structure

Abstract

The utility model relates to the technical field of micro electromagnetic pump, specifically disclose a kind of micro electromagnetic pump with high efficiency sealing structure, including shell and pump body main part, and pump body main part is by framework, inlet pipe, outlet pipe and electromagnetic assembly composition, shell is cavity structure, respectively set up and pass through the first through-hole and the second through-hole for inlet pipe, outlet pipe, first connecting end extending towards shell is equipped in first through-hole, and the outer wall of first connecting end is equipped with first sealing groove, second connecting end extending towards shell is equipped in second through-hole, and the outer wall of second connecting end is equipped with second sealing groove, the opening of first sealing groove and second sealing groove is all set towards shell inner wall, and first sealing groove and second sealing groove are all nested with the composite sealing ring of cross section as H shape, and the inner wall of inlet pipe and outlet pipe is respectively equipped with first annular protrusion and second annular protrusion.The utility model is reliable in sealing, and pumping efficiency is high, and structure is stable, applicable to micro precision fluid control scene.

Description

Technical Field

[0001] This utility model relates to the field of micro electromagnetic pump technology, specifically to a micro electromagnetic pump with a highly efficient sealing structure. Background Technology

[0002] A miniature electromagnetic pump is a device that uses electromagnetic force to drive the flow of liquid. It has a unique working principle, structural features, and a wide range of applications. A miniature electromagnetic pump consists of a casing and a pump body. The pump body comprises an inlet pipe, an outlet pipe, and an electromagnetic drive assembly. Liquid enters through the inlet pipe, is pressurized by the electromagnetic drive assembly, and is then transported to the designated location through the outlet pipe.

[0003] In existing technologies, the inlet and outlet pipes of micro electromagnetic pumps and the through holes of the outer casing mostly use a single O-ring or clearance fit. With long-term use, the seals are prone to failure due to vibration and wear, resulting in a high risk of leakage. At the same time, traditional valve cores are mostly solid structures with external springs, which are easily affected by fluid impact and electromagnetic force, causing them to wobble. This leads to a decrease in the fit accuracy between the sealing head and the flow channel, resulting in insufficient pumping reliability. In addition, the guide structure lacks a dedicated flow guiding design, which easily forms turbulence in the pump body, increasing flow resistance and thus reducing pumping efficiency, failing to meet the usage requirements. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this utility model provides a miniature electromagnetic pump with an efficient sealing structure that is easy to assemble, has reliable sealing, high pumping efficiency, and stable structure, making it suitable for micro-precision fluid control scenarios.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A miniature electromagnetic pump with a highly efficient sealing structure includes a housing and a pump body disposed within the housing. The pump body consists of a frame, an inlet pipe, an outlet pipe, and an electromagnetic assembly. The housing has a cavity structure with a first through hole and a second through hole for the inlet and outlet pipes to pass through. The electromagnetic assembly is mounted on the frame and cooperates with the flow channels of the inlet and outlet pipes to achieve fluid pumping. A first connecting end extending into the housing is provided at the first through hole, and a first sealing groove is provided on the outer wall of the first connecting end. A second connecting end extending into the housing is provided at the second through hole, and a second sealing groove is provided on the outer wall of the second connecting end. The openings of both the first and second sealing grooves face... The inner wall of the outer casing is provided with composite sealing rings with an I-shaped cross-section nested in both the first and second sealing grooves. The inner walls of the inlet pipe and the outlet pipe are respectively provided with a first annular protrusion and a second annular protrusion. The first annular protrusion and the second annular protrusion form an interference fit with the composite sealing rings in the first and second sealing grooves, respectively. The electromagnetic component includes a coil, a valve core and a spring. The valve core has a hollow stepped shaft structure. The spring is nested in the hollow cavity of the valve core. One end of the valve core is provided with a conical sealing head, which forms a line seal with the flow channel outlet of the inlet pipe. The inner wall of the second connecting end is provided with a spiral guide groove. The other end of the valve core is set towards the guide groove.

[0006] Preferably, the composite sealing ring consists of an inner rubber layer and an outer metal frame. The inner rubber layer contacts the outer wall of the inlet and outlet pipes, and the outer metal frame fits against the wall of the sealing groove.

[0007] Preferably, the guide channel extends axially, and the inlet of the guide channel corresponds to the outlet of the inlet pipe, and the outlet of the guide channel corresponds to the inlet of the outlet pipe.

[0008] Preferably, the outlet pipe is L-shaped, with a one-way valve at the inlet and a hexagonal connector for external pipeline at the outlet.

[0009] Preferably, the outer side of the housing is provided with a mounting plate with mounting holes, and the mounting plate is integrally formed with the housing.

[0010] The beneficial effects of this utility model are as follows: the combination of the sealing groove and the I-shaped composite sealing ring, along with the interference fit of the annular protrusions on the inner walls of the inlet and outlet water pipes, increases the sealing contact area, reduces the leakage rate, and significantly improves sealing reliability, which is superior to traditional sealing structures; the design of the hollow stepped shaft with a built-in spring in the valve core avoids the spring from being impacted by fluid and electromagnetic interference, reducing the valve core deflection, and the line sealing design of the conical sealing head and the flow channel further optimizes the valve core movement stability and closing sealing performance; relying on the spiral guide groove on the inner wall of the second connection end, the fluid is guided to form an orderly swirling flow, reducing flow resistance, increasing pumping flow rate, and improving pumping efficiency. Attached Figure Description

[0011] Figure 1 : This is a structural schematic diagram of an embodiment of the present utility model; Figure 2 : This is a cross-sectional structural schematic diagram of an embodiment of the present utility model; Explanation of reference numerals in the attached diagram: 10-Outer shell, 11-Mounting plate, 111-Mounting hole, 12-First through hole, 13-Second through hole, 14-First connecting end, 15-First sealing groove, 16-Composite sealing ring, 161-Rubber layer, 162-Metal frame, 17-Second connecting end, 18-Second sealing groove. 21-Skeleton, 22-Inlet pipe, 221-First annular protrusion, 23-Outlet pipe, 231-Second annular protrusion, 232-Hexagonal connector, 24-Valve core, 25-Spring, 26-Conical sealing head, 27-One-way valve. Detailed Implementation

[0012] To more clearly illustrate the structural features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments: This embodiment: as follows Figure 1-2 As shown, a miniature electromagnetic pump with a high-efficiency sealing structure includes a housing 10 and a pump body body disposed inside the housing 10. The outer side of the housing 10 is provided with a mounting plate 11 with mounting holes 111. The mounting plate 11 is integrally formed with the housing 10. The pump body body is composed of a frame 21, an inlet pipe 22, an outlet pipe 23 and an electromagnetic component. The housing 10 has a cavity structure and is provided with a first through hole 12 and a second through hole 13 for the inlet pipe 22 and the outlet pipe 23 to pass through. The electromagnetic component is mounted on the frame 21 and cooperates with the flow channels of the inlet pipe 22 and the outlet pipe 23 to realize fluid pumping. A first connecting end 14 extending into the outer shell 10 is provided at the first through hole 12. A first sealing groove 15 is provided on the outer wall of the first connecting end 14. A second connecting end 17 extending into the outer shell 10 is provided at the second through hole 13. A second sealing groove 18 is provided on the outer wall of the second connecting end 17. The openings of the first sealing groove 15 and the second sealing groove 18 are both oriented towards the inner wall of the outer shell 10. A composite sealing ring 16 with an I-shaped cross-section is nested in both the first sealing groove 15 and the second sealing groove 18. The composite sealing ring 16 is composed of an inner rubber layer 161 and an outer metal frame 162. The rubber layer 161 contacts the outer wall of the inlet pipe 22 and the outlet pipe 23. The outer metal frame 162 fits against the wall of the sealing groove. The inner walls of the inlet pipe 22 and the outlet pipe 23 are respectively provided with a first annular protrusion 221 and a second annular protrusion 231. The first annular protrusion 221 and the second annular protrusion 231 respectively form an interference fit with the composite sealing ring 16 in the first sealing groove 15 and the second sealing groove 18, so that the first through hole 12, the first connecting end 14, the inlet pipe 22, the second through hole 13, the second connecting end 17 and the outlet pipe 23 are connected to form a complete flow channel. The electromagnetic component includes a coil, a valve core 24, and a spring 25. The valve core 24 has a hollow stepped shaft structure, and the spring 25 is nested inside the hollow cavity of the valve core 24. One end of the valve core 24 is provided with a conical sealing head 26, which forms a line seal with the outlet of the inlet pipe 22. The inner wall of the second connecting end 17 is provided with a spiral guide groove, and the other end of the valve core 24 is set towards the guide groove. The guide groove of the second connecting end 17 extends axially, and the inlet of the guide groove corresponds to the outlet of the inlet pipe 22. The outlet of the guide groove corresponds to the inlet of the outlet pipe 23. The outlet pipe 23 is L-shaped, and a one-way valve 27 is provided at its inlet. A hexagonal connector 232 for external pipeline is provided outside its outlet.

[0013] This product, through the cooperation of the sealing groove and the I-shaped composite sealing ring 16, combined with the interference fit of the annular protrusion on the inner wall of the inlet and outlet water pipes 23, increases the sealing contact area, reduces the leakage rate, and significantly improves the sealing reliability, which is superior to traditional sealing structures. With the design of the hollow stepped shaft of the valve core 24 and the built-in spring 25, the spring 25 is avoided from being affected by fluid impact and electromagnetic interference, reducing the deflection of the valve core 24. Combined with the line sealing design of the conical sealing head 26 and the flow channel, the movement stability and closing sealing performance of the valve core 24 are further optimized. Relying on the spiral guide groove on the inner wall of the second connection end 17, the fluid is guided to form an orderly swirling flow, reducing flow resistance, increasing pumping flow rate, and improving pumping efficiency.

[0014] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A miniature electromagnetic pump with a high-efficiency sealing structure, comprising a housing and a pump body disposed within the housing, the pump body comprising a frame, an inlet pipe, an outlet pipe, and an electromagnetic assembly; the housing having a cavity structure, with a first through hole and a second through hole for the inlet pipe and outlet pipe to pass through, respectively; the electromagnetic assembly being mounted on the frame and cooperating with the flow channels of the inlet and outlet pipes to achieve fluid pumping, characterized in that: The first through hole has a first connecting end extending into the outer shell, and the outer wall of the first connecting end has a first sealing groove. The second through hole has a second connecting end extending into the outer shell, and the outer wall of the second connecting end has a second sealing groove. The openings of the first sealing groove and the second sealing groove are both set towards the inner wall of the outer shell, and a composite sealing ring with an I-shaped cross section is nested in both the first sealing groove and the second sealing groove. The inner walls of the water inlet pipe and the water outlet pipe are respectively provided with a first annular protrusion and a second annular protrusion. The first annular protrusion and the second annular protrusion form an interference fit with the composite sealing ring in the first sealing groove and the second sealing groove, respectively. The electromagnetic component includes a coil, a valve core and a spring. The valve core has a hollow stepped shaft structure, and the spring is nested in the hollow cavity of the valve core. One end of the valve core is provided with a conical sealing head, which forms a line seal with the flow channel outlet of the water inlet pipe. The inner wall of the second connecting end is provided with a spiral guide groove, and the other end of the valve core is set towards the guide groove.

2. The miniature electromagnetic pump with a high-efficiency sealing structure according to claim 1, characterized in that: The composite sealing ring consists of an inner rubber layer and an outer metal frame. The inner rubber layer contacts the outer wall of the inlet and outlet pipes, while the outer metal frame fits against the wall of the sealing groove.

3. The miniature electromagnetic pump with a high-efficiency sealing structure according to claim 1, characterized in that: The guide channel extends axially, and the inlet of the guide channel corresponds to the outlet of the inlet pipe, while the outlet of the guide channel corresponds to the inlet of the outlet pipe.

4. The miniature electromagnetic pump with a high-efficiency sealing structure according to claim 1, characterized in that: The outlet pipe is L-shaped, with a one-way valve at the inlet and a hexagonal connector for external pipelines at the outlet.

5. The miniature electromagnetic pump with a high-efficiency sealing structure according to claim 1, characterized in that: The outer side of the casing is provided with a mounting plate with mounting holes, and the mounting plate is integrally formed with the casing.

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