Electromagnetic diaphragm pump

Abstract

The utility model discloses an electromagnetic diaphragm pump which comprises a pump body upper cover, a pump body lower cover, a liquid inlet one-way valve plate, a liquid outlet one-way valve plate, a one-way valve plate sealing ring and an outer ring sealing ring. The pump body upper cover and the pump body lower cover are clamped to form a sealing structure, the liquid inlet one-way valve plate, the liquid outlet one-way valve plate, the one-way valve plate sealing ring and the outer ring sealing ring are all installed in the pump body lower cover, and the one-way valve plate sealing ring comprises two annular structures. The liquid inlet one-way valve plate and the liquid outlet one-way valve plate are located in the two annular structures respectively, the one-way valve plate sealing ring is located in the outer ring sealing ring, the one-way valve structure of the diaphragm pump body is of a diaphragm type, a one-way valve structure with a spring is not used, and compared with a spring type one-way valve structure, the diaphragm type one-way valve structure has the advantages that the number of parts is small, and cost is low. Installation is easy, occupied space in the height direction is small, and arrangement and installation of the pump body are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the diaphragm pump field, more specifically, the utility model relates to an electromagnetic diaphragm pump. BACKGROUND

[0002] With people's environmental protection consciousness gradually strengthens, the national exhaust emission standard requirement of automobile is more and more strict. In order to meet the strict standard of national requirement, each automobile and engine manufacturer needs to increase a set of engine exhaust aftertreatment system in the automobile system. The main working principle of the system is that before the exhaust enters the catalytic converter, the urea aqueous solution is injected into the exhaust as reducing agent, realizes the reduction to NOx, to achieve the effect of reducing NOx emission, thereby achieving the purpose of environmental protection.

[0003] In the whole exhaust aftertreatment system, the urea pump is a key component. At present, the main parts of the liquid suction in the urea pump on the market are in the form of gear pump and diaphragm pump, but the pump body of the electromagnetic diaphragm pump generally adopts a one-way valve structure with a spring, which is complex to install, occupies a large space in the height direction, and is not conducive to the arrangement of the pump body and the later installation. SUMMARY

[0004] In order to achieve these purposes and other advantages according to the utility model, a preferred embodiment of the utility model provides an electromagnetic diaphragm pump, comprising a pump body upper cover, a pump body lower cover, a liquid inlet one-way valve piece, a liquid outlet one-way valve piece, a one-way valve piece sealing ring and an outer ring sealing ring.

[0005] The pump body upper cover and the pump body lower cover are clamped to form a sealed structure, the liquid inlet one-way valve piece, the liquid outlet one-way valve piece, the one-way valve piece sealing ring and the outer ring sealing ring are all installed in the pump body lower cover, the one-way valve piece sealing ring contains two annular structures, the liquid inlet one-way valve piece and the liquid outlet one-way valve piece are respectively located in the two annular structures, and the one-way valve piece sealing ring is located in the outer ring sealing ring.

[0006] According to a preferred embodiment of the utility model, one side of the pump body upper cover close to the pump body lower cover is provided with a plurality of installation protrusions, and the installation protrusions can abut against the upper surface of the pump body lower cover.

[0007] According to a preferred embodiment of the utility model, the liquid inlet one-way valve piece and the liquid outlet one-way valve piece are both installed in the pump body lower cover through a positioning clamping mechanism.

[0008] According to a preferred embodiment of the utility model, the inner side of the pump body upper cover is provided with a plurality of bosses, the inner side of the pump body lower cover is provided with a plurality of recesses, and the bosses and the recesses correspond one by one.

[0009] According to a preferred embodiment of the utility model, the inner side of the upper cover of the pump body is provided with a plurality of convex planes.

[0010] According to a preferred embodiment of the utility model, the liquid inlet one-way valve piece and the liquid outlet one-way valve piece are both abutted against the inner side wall of the one-way valve piece sealing ring.

[0011] The utility model has at least the following beneficial effects:

[0012] (1) In the utility model, the one-way valve structure of the diaphragm pump body is of the diaphragm type, and a one-way valve structure with a spring is not used, the one-way valve structure of the diaphragm type has less number of parts, is simple to install, occupies small space in the height direction, and is conducive to the arrangement and installation of the pump body.

[0013] (2) The utility model is provided with an outer ring sealing ring in addition to the one-way valve piece sealing ring to ensure the sealing performance of the pump body.

[0014] (3) The sealing ring and the one-way valve piece have different requirements for rubber parts, and the utility model is specially designed to have the one-way valve piece and the sealing ring in a split type, and the one-way diaphragm is additionally provided with a positioning and pressing structure to prevent the one-way valve piece from moving.

[0015] (4) The utility model adopts a small plane contact structure design, which can reduce the requirement for the flatness of the upper cover of the pump body, and can reduce the failure points in the debugging and production of the mold of the pump cover and the assembly of the pump body.

[0016] Other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by those skilled in the art through research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure schematic view of the electromagnetic diaphragm pump in the utility model;

[0018] Figure 2 It is a sectional view of the electromagnetic diaphragm pump in the utility model;

[0019] Figure 3 It is a plan view of the electromagnetic diaphragm pump in the utility model;

[0020] Figure 4 It is a structure schematic view of the upper cover of the pump body in the utility model. DETAILED DESCRIPTION

[0021] The utility model makes further detailed description in combination with the drawings, so that the person skilled in the art can implement according to the description.

[0022] The following description is used to disclose the utility model so that the person skilled in the art can implement the utility model. The preferred embodiments in the following description are only as examples, and other obvious modifications can be thought of by the person skilled in the art. The basic principles of the utility model defined in the following description can be applied to other implementation schemes, modification schemes, improvement schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.

[0023] The person skilled in the art should understand that in the disclosure of the utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the utility model.

[0024] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0025] As Figures 1-4 The utility model provides a kind of electromagnetic diaphragm pump for a preferred embodiment of the utility model, it is characterized by, including pump body upper cover 1, pump body lower cover 6, liquid outlet check valve piece 2, liquid inlet check valve piece 3, check valve piece sealing ring 4 and outer ring sealing ring 5;

[0026] The pump body upper cover 1 and the pump body lower cover 6 are clamped to form a sealed structure, the liquid outlet check valve piece 2, the liquid inlet check valve piece 3, the check valve piece sealing ring 4 and the outer ring sealing ring 5 are all installed in the pump body lower cover 6, and the check valve piece sealing ring 4 contains two annular structures, the liquid outlet check valve piece 2 and the liquid inlet check valve piece 3 are located in the two annular structures respectively, and the check valve piece sealing ring 4 is located in the outer ring sealing ring 5.

[0027] In the technical solution, the main function of the diaphragm pump body is to cooperate with the diaphragm action to make the fluid flow in one direction according to the designed flow channel. Specifically, the fluid enters the liquid outlet one-way valve piece 2 through the opening of the pump body upper cover 1, then flows out from the liquid outlet one-way valve piece 2, and finally flows out through the hole on the pump body lower cover 6, realizing the one-way flow of the fluid. When the diaphragm is not in action, the liquid inlet one-way valve piece is attached to the liquid inlet of the pump body upper cover, and the liquid outlet one-way valve piece is attached to the liquid outlet of the pump body lower cover. When the diaphragm is in action and away from the outer surface of the pump body lower cover, negative pressure is formed between the diaphragm and the outer surface of the lower cover. At this time, the liquid outlet one-way valve piece is closed, and the liquid inlet one-way valve piece is opened by the fluid, and the cavity is filled with fluid. When the diaphragm contacts the outer surface of the pump body lower cover, pressure is formed between the diaphragm and the outer surface of the lower cover. At this time, the liquid inlet one-way valve piece is closed, and the liquid outlet one-way valve piece is opened by the fluid to discharge the fluid. Such a cycle of reciprocating circulation will realize the one-way flow of the fluid.

[0028] The urea pump has very high sealing performance requirements. In order to ensure the sealing performance, a one-way valve piece sealing ring 4 and an outer ring sealing ring 5 are designed between the pump bodies. The one-way valve piece sealing ring 4 directly contacts the urea solution and is the first and most important sealing structure. When the one-way valve piece sealing ring has slight leakage, the outer ring sealing ring 5 can play a secondary sealing role to prevent the urea solution from overflowing between the upper and lower covers of the pump body.

[0029] For the urea solution between the one-way valve piece sealing ring and the outer ring sealing ring, the liquid leaked from the one-way valve piece sealing ring 4 can be combined with the liquid outlet liquid through the communication hole on the pump body upper cover.

[0030] Since the one-way valve piece 3 and the one-way valve piece sealing ring 4 are installed close to each other, in general, the two parts are designed as a whole. However, since the sealing ring and the one-way valve have different requirements for the performance of rubber, and when designed as a whole structure, the sealing ring is compressed, the position of the one-way valve piece will be displaced, and the one-way performance of the one-way valve piece may be affected. Therefore, the structure is designed as a split type. This design can not only ensure the sealing performance of the sealing ring, but also ensure that the performance of the one-way valve piece is not affected.

[0031] Another technical solution is that the one surface of the pump body upper cover close to the pump body lower cover is provided with a plurality of mounting protrusions, and the mounting protrusions can abut against the upper surface of the pump body lower cover.

[0032] Another technical solution is that the liquid outlet one-way valve piece 2 and the liquid inlet one-way valve piece 3 are installed in the pump body lower cover 6 through a positioning clamping mechanism. The pump body lower cover is provided with a groove corresponding to the positioning clamping mechanism on the corners of the liquid outlet one-way valve piece 2 and the liquid inlet one-way valve piece 3, which can play a role in positioning the one-way valve piece.

[0033] Another technical solution, the inner side of the upper cover 1 of the pump body is provided with a plurality of bosses, the inner side of the lower cover 6 of the pump body is provided with a plurality of recesses, the bosses and the recesses correspond one by one. When the two holes and the bosses cooperate with each other, and the two pump body covers are pressed tightly, the positions of the rubber parts between the pump bodies are fixed, and the inlet and outlet flow channels are naturally formed. At this time, the basic function of the pump body can be guaranteed. In this way, it can be ensured that each component can normally play its function, and the position of each component cannot be deviated. The positions of the upper cover and the lower cover are relatively fixed, so that the positions of the rubber parts between the upper cover and the lower cover cannot be deviated.

[0034] Another technical solution, the inner side of the upper cover 1 of the pump body is provided with a plurality of bosses, the inner side of the lower cover 6 of the pump body is provided with a plurality of recesses, the bosses and the recesses correspond one by one. When the two holes and the bosses cooperate with each other, and the two pump body covers are pressed tightly, the positions of the rubber parts between the pump bodies are fixed, and the inlet and outlet flow channels are naturally formed. At this time, the basic function of the pump body can be guaranteed. In this way, it can be ensured that each component can normally play its function, and the position of each component cannot be deviated. The positions of the upper cover and the lower cover are relatively fixed, so that the positions of the rubber parts between the upper cover and the lower cover cannot be deviated.

[0035] Another technical solution, the outlet one-way valve plate 2 and the inlet one-way valve plate 3 are in abutment with the inner side wall of the one-way valve plate sealing ring 4, and play a certain limiting role on the outlet one-way valve plate 2 and the inlet one-way valve plate 3.

[0036] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. An electromagnetic diaphragm pump, characterized by The pump body upper cover, the pump body lower cover, the liquid inlet one-way valve sheet, the liquid outlet one-way valve sheet, the one-way valve sheet sealing ring and the outer ring sealing ring are included. The pump body upper cover and the pump body lower cover are clamped to form a sealed structure, the liquid inlet one-way valve sheet, the liquid outlet one-way valve sheet, the one-way valve sheet sealing ring and the outer ring sealing ring are all installed in the pump body lower cover, the one-way valve sheet sealing ring contains two annular structures, the liquid inlet one-way valve sheet and the liquid outlet one-way valve sheet are respectively located in the two annular structures, and the one-way valve sheet sealing ring is located in the outer ring sealing ring.

2. The electromagnetic diaphragm pump according to claim 1, characterized in that The one side of the pump body upper cover close to the pump body lower cover is provided with a plurality of installation protrusions, and the installation protrusions can abut against the upper surface of the pump body lower cover.

3. The electromagnetic diaphragm pump of claim 1, wherein, The liquid inlet one-way valve sheet and the liquid outlet one-way valve sheet are both installed in the pump body lower cover through a positioning clamping mechanism.

4. The electromagnetic diaphragm pump of claim 1, wherein, The inner side of the pump body upper cover is provided with a plurality of bosses, and the inner side of the pump body lower cover is provided with a plurality of recesses, and the bosses and the recesses correspond to each other.

5. The electromagnetic diaphragm pump of claim 1, wherein, The inner side of the pump body upper cover is provided with a plurality of protruding planes.

6. The electromagnetic diaphragm pump of claim 1, wherein, The liquid inlet one-way valve sheet and the liquid outlet one-way valve sheet both abut against the inner side wall of the one-way valve sheet sealing ring.

Images