Electromagnetic pump with improved pump body connecting structure

Abstract

An electromagnetic pump with an improved pump body connecting structure comprises a stator assembly, a waterproof sleeve, a pump body, a movable pump core, a spring and a non-return assembly and is characterized in that the waterproof sleeve is tubular, two through holes which are opposite in the radial direction and communicated with an inner cavity of the waterproof sleeve are formed in the side, close to the pump body, of the waterproof sleeve in the axial direction, and the pump body comprises a hollow columnar main body part; the radial surface, axially close to one side of the waterproof sleeve, of the main body portion is concave inwards to form an annular inner groove, and limiting pieces which stretch into the inner groove of the pump body and limit the pump body to axially disengage from the waterproof sleeve are arranged in the opening direction of the two through holes. According to the electromagnetic pump with the improved pump body connecting structure, a threaded hole does not need to be formed in the stator assembly, the pump body can be arranged at one axial end of the waterproof sleeve in an anti-falling mode by utilizing the limiting piece to penetrate through the through hole in the waterproof sleeve and stretch into the groove of the pump body, and the risk that external water vapor permeates into the stator assembly to cause short circuit is reduced; and the working stability of the electromagnetic pump is improved.

Description

Technical Field

[0001] This utility model relates to an electromagnetic pump with an improved pump body connection structure, and its IPC classification is F04B53 / 16. Background Technology

[0002] The existing electromagnetic pump structure, as shown in patent publication number CN205445937U, includes a magnetic shielding tube (i.e., a water-proof sleeve), a pump body, a pump core disposed within the magnetic shielding tube, a coil enameled wire disposed radially outside the magnetic shielding tube, and a magnetic conductor (i.e., a magnetic yoke) that sleeves the coil enameled wire inside the magnetic conductor. The magnetic conductor has screw holes, and the pump body is fitted onto the magnetic conductor and secured with screws. When the existing electromagnetic pump is used in a humid environment or in an area with splashing water, external moisture or water can seep into the coil enameled wire along the screws and the screw holes of the magnetic conductor, leading to a risk of leakage. Therefore, there is a need for improvement. Utility Model Content

[0003] To solve the above problems, this utility model provides the following technical solution:

[0004] An improved electromagnetic pump body connection structure includes a stator assembly, a water-proof sleeve fixed on the stator assembly, a pump body disposed on one axial side of the water-proof sleeve, a movable pump core installed in the working cavity enclosed by the water-proof sleeve and the pump body, a spring disposed on one axial side of the movable pump core, and a check valve assembly disposed on the other axial side of the movable pump core. The water-proof sleeve is tubular, with two radially opposite through holes on its axial side near the pump body that communicate with its inner cavity. The pump body includes a hollow cylindrical main body, with an annular groove formed by an inwardly recessed radial surface on the axial side near the water-proof sleeve. Both through holes have limiting members extending into the groove of the pump body and restricting the pump body from axially disengaging from the water-proof sleeve.

[0005] The improved pump body connection structure of this invention eliminates the need for threaded holes on the stator assembly. By using a limiting member that passes through the through hole on the water-proof sleeve and extends into the groove of the pump body, the pump body can be fixed to one axial end of the water-proof sleeve to prevent it from falling off. This reduces the risk of external water vapor seeping into the stator assembly and causing a short circuit, and improves the working stability of the electromagnetic pump.

[0006] Furthermore, the limiting member is a pair of interlocking inserts. In the axial projection of the electromagnetic pump, the outline of the insert projection at least partially coincides with the outline of the inner groove projection, and the outline of the through hole projection at least partially coincides with the outline of the insert projection.

[0007] Furthermore, the interlocking inserts have the same structure. Each insert includes a first insertion portion, a second insertion portion, and a connecting portion connecting the two on both sides. The first insertion portion and the second insertion portion protrude outward from the end face of the other insert they interlock with, respectively, forming a first cantilever and a second cantilever. The ends of the first cantilever and the second cantilever are respectively provided with a first buckle and a second buckle. In the axial projection of the electromagnetic pump, the outlines of the projections of the first cantilever and the second cantilever at least partially coincide with the outline of the projection of the inner groove.

[0008] Furthermore, in the axial projection of the electromagnetic pump, the profile of the impeller projection is located radially outside the profile of the projection of the radial surface of the inner groove.

[0009] Furthermore, the axial protrusions of the first and second undercuts are in opposite directions.

[0010] Furthermore, the first and second inserts have columnar first and second perimeters protruding outwards from their respective end faces toward the other insert piece they interlock with.

[0011] Furthermore, the axial end face of the connector has at least one pair of columnar bosses protruding.

[0012] Furthermore, an annular mounting boss is provided on the side of the water-proof sleeve axially close to the pump body. The mounting boss is located axially below the through hole, and an elastic first sealing ring is provided between the pump body and the mounting boss axially.

[0013] Furthermore, the outer surface of the pump body axially close to the water-proof sleeve is radially concave to form an annular first mounting platform, and the inner wall surface of the pump body axially close to the water-proof sleeve is radially concave to form an annular second mounting platform. The first mounting platform and the second mounting platform are respectively provided with a second elastic sealing ring and a third elastic sealing ring. In the assembled state, the first mounting platform and the second mounting platform are located axially below the through hole. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the electromagnetic pump with the improved pump body connection structure according to this utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the solenoid valve before the assembly limiting part of this utility model.

[0016] Figure 3 This is a cross-sectional view of the electromagnetic pump with the improved pump body connection structure of this utility model through the axial section S1;

[0017] Figure 4 This is a cross-sectional view of the electromagnetic pump with the improved pump body connection structure of this utility model through the axial section S2;

[0018] Figure 5This is a radial sectional view of the electromagnetic pump with the improved pump body connection structure of this utility model;

[0019] Figure 6 This is a three-dimensional structural diagram of the insert of this utility model;

[0020] Figure 7 This is a three-dimensional structural diagram of the pump body of this utility model;

[0021] Wherein: 10-working chamber, 100-stator assembly, 110-coil frame, 120-enameled wire, 130-first magnetic sleeve, 140-second magnetic sleeve, 150-magnetic yoke, 160-outer shell, 200-waterproof sleeve, 210-through hole, 220-mounting boss, 300-pump body, 310-main body, 311-inner groove, 312-radial surface of the inner groove; 320-first mounting platform, 330-second mounting platform, 400-live 500-Spring, 600-Check valve assembly, 700-Plate, 710-First insertion part, 711-First cantilever, 712-First buckle, 713-First perimeter part, 720-Second insertion part, 720-Second cantilever, 722-Second buckle, 723-Second perimeter part, 730-Connecting part, 731-Boss, 810-First elastic sealing ring, 820-Second elastic sealing ring, 830-Third elastic sealing ring Detailed Implementation

[0022] Figure 1 and Figure 2 These are a three-dimensional structural diagram of the electromagnetic pump of this utility model and a partially exploded structural diagram of the electromagnetic pump, respectively. Figure 3 This is a cross-sectional view of the electromagnetic pump of this utility model after being cut by section S1. Section S1 is a plane passing through the axis of the electromagnetic pump and perpendicular to the limiting member. Figure 4 This is a sectional view of the electromagnetic pump of this utility model after being cut by section S2. Section S2 is a plane parallel to section S1, and its axial projection contour lies within the axial projection contour of the inner groove. See Figures 1 to 4The electromagnetic pump of this utility model includes a stator assembly 100, a water-proof sleeve 200 fixed on the stator assembly 100, a pump body 300 disposed on one axial side of the water-proof sleeve 200, a movable pump core 400 installed in the working cavity 10 enclosed by the water-proof sleeve 200 and the pump body 300, a spring 500 disposed on one axial side of the movable pump core 400, a check valve assembly 600 disposed on the other axial side of the movable pump core 400, and a limiting member. The stator assembly 100 includes a coil frame 110 and an enameled wire 1 wound on the coil frame. 20. A first magnetic sleeve 130 and a second magnetic sleeve 140 are disposed on the coil frame 110; a magnetic yoke 150 is disposed on the outer periphery of the coil frame 110 and connected to the first magnetic sleeve 130 and the second magnetic sleeve 140; a housing 160; a water-proof sleeve 200 is tubular, and has two radially opposite through holes 210 on the axial side near the pump body 300 that communicate with its inner cavity; the pump body 300 includes a hollow cylindrical main body 310, and the radial surface of the main body 310 on the axial side near the water-proof sleeve is recessed to form an annular groove 311. The movable pump core 400 and the check valve assembly 600 of this utility model are the same as those in the prior art, and will not be described again here.

[0023] See Figure 2 and Figure 3 During assembly of the electromagnetic pump of this invention, the pump body 300 is first inserted into the hollow cavity of the water-proof sleeve 200. Then, a limiting member passes through the two through holes 210 of the water-proof sleeve and extends into the inner groove 311 of the pump body. After the above assembly, the limiting member restricts the axial portion of the pump body 300 within the hollow cavity of the water-proof sleeve 200, preventing the pump body 300 from axially detaching from the water-proof sleeve 200. This improved pump body connection structure of the electromagnetic pump eliminates the need for threaded holes on the stator assembly. By using a limiting member passing through the through holes on the water-proof sleeve and extending into the groove of the pump body, the pump body can be securely positioned at one axial end of the water-proof sleeve, reducing the risk of short circuits caused by external moisture seeping into the stator assembly and improving the operational stability of the electromagnetic pump.

[0024] Furthermore, see Figure 2 The limiting element is a pair of interlocking inserts 700. See Figure 5 In the axial projection of the electromagnetic pump, the outline of the projection of the insert 700 coincides with the outline of the projection of the inner groove 311 of the pump body, and the outline of the projection of the insert 700 coincides with the outline of the projection of the insert 700. The limiting component of this utility model has a simple structure, which is convenient for production, processing and assembly. Of course, as other embodiments, the limiting component can also be a pin, a retaining ring or other parts that can limit the axial movement of the pump body.

[0025] Furthermore, see Figures 4 to 6The limiting member of this utility model is a pair of identical inserts 700. Each insert 700 includes a first insertion portion 710, a second insertion portion 720, and a connecting portion 730 connecting the two. The first insertion portion 710 has a first cantilever 711 protruding outwards from the end face of the insert it interlocks with, and the end of the first cantilever 711 has a first buckle 712. The second insertion portion 720 has a second cantilever 721 protruding outwards from the end face of the insert it interlocks with, and the end of the second cantilever 721 has a second buckle 722. In the axial projection of the electromagnetic pump, the projections of the first cantilever 711 and the second cantilever 721 at least partially coincide with the outline of the projection of the inner groove 311. Furthermore, in the axial projection of the electromagnetic pump, the outline of the projection of the insert 700 is located radially outside the outline of the projection of the radial surface 312 of the inner groove 311 of the pump body. This electromagnetic pump design allows the pump body to rotate freely circumferentially for assembly with external equipment while restricting axial disengagement and keeping the stator assembly and water-proof sleeve stationary, thus improving the versatility of the electromagnetic pump. Furthermore, see... Figure 6 In this invention, the axial protrusions of the first inverted buckle 712 and the second inverted buckle 722 are in opposite directions. This design allows the insert to be inserted into the through hole regardless of its axial orientation to complete the connection, facilitating the automated installation of the electromagnetic pump.

[0026] Furthermore, see Figure 3 and Figure 6 In this invention, the first insertion portion 710 and the second insertion portion 720 of the insert 700 have columnar first and second perimeter portions 713 and 723 respectively protruding outwards from the end faces of the other insert that it interlocks with. This design prevents external dirt from accumulating in the inner groove through the through hole, thus avoiding bacterial growth and improving the safety of the electromagnetic pump.

[0027] Furthermore, see Figure 6 In this invention, the connecting portion 730 of the insert 700 has a pair of columnar bosses 731 protruding from its axial end face. The design of these bosses facilitates the clamping and limiting of the limiting portion during manufacturing, thereby improving the assembly efficiency of the electromagnetic pump.

[0028] See Figure 3 The electromagnetic pump of this invention also includes a first elastic sealing ring 810, and a water-separating sleeve 200 with an annular mounting boss 220 axially located near the pump body 300, the mounting boss 220 being located axially below the through hole 210. During assembly, the first sealing ring 810 is axially positioned between the pump body 300 and the mounting boss 220. This design effectively reduces liquid leakage from the connection between the pump casing and the water-separating sleeve, improving the stability of the electromagnetic pump operation.

[0029] See Figure 3 and Figure 7The electromagnetic pump of this invention also includes a second elastic sealing ring 820 and a third elastic sealing ring 830. Further, the pump body 300 has a radially concave outer surface on the side axially close to the water-separating sleeve 200 to form an annular first mounting platform 320, and the pump body 300 has a radially outward concave inner wall on the side axially close to the water-separating sleeve 200 to form an annular second mounting platform 330. During installation, the second elastic sealing ring 820 is fitted onto the first mounting platform 320, and the third elastic sealing ring 830 is fitted onto the second mounting platform 330. After assembly, both the first mounting platform 320 and the second mounting platform 330 are located axially below the through hole 210.

[0030] This utility model is not limited to the above-described embodiments. If any modifications or variations to this utility model do not depart from the spirit and scope of this utility model, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this utility model, then this utility model also intends to include such modifications and variations.

Claims

1. An electromagnetic pump with an improved pump body connection structure, comprising a stator assembly (100), a water-proof sleeve (200) fixed on the stator assembly, a pump body (300) disposed on one axial side of the water-proof sleeve, a movable pump core (400) installed in the working cavity (10) formed by the water-proof sleeve and the pump body, a spring (500) disposed on one axial side of the movable pump core, and a check assembly (600) disposed on the other axial side of the movable pump core, characterized in that: The water-proof sleeve (200) is tubular, and has two radially opposite through holes (210) that are connected to its inner cavity on the side axially close to the pump body. The pump body (300) includes a hollow cylindrical main body (310). The radial surface of the main body on the side axially close to the water-proof sleeve is recessed to form an annular groove (311). The opening direction of the two through holes (210) is provided with a limiting member that extends into the groove (311) of the pump body and restricts the pump body (300) from axially dislodging from the water-proof sleeve (200).

2. The electromagnetic pump with the improved pump body connection structure according to claim 1, characterized in that: The limiting member is a pair of interlocking inserts (700). In the axial projection of the electromagnetic pump, the outline of the projection of the insert (700) at least partially coincides with the outline of the projection of the inner groove (311), and the outline of the projection of the insert (700) at least partially coincides with the outline of the projection of the through hole (210).

3. The electromagnetic pump with the improved pump body connection structure according to claim 2, characterized in that: The interlocking inserts (700) have the same structure. Each insert (700) includes a first insertion part (710), a second insertion part (720), and a connecting part (730) connecting the two on both sides. The first insertion part (710) and the second insertion part (720) protrude outward from the end face of the other insert they interlock with, respectively, with a first cantilever (711) and a second cantilever (721). The ends of the first cantilever (711) and the second cantilever (721) are respectively provided with a first buckle (712) and a second buckle (722). In the axial projection of the electromagnetic pump, the outline of the projection of the first cantilever (711) and the second cantilever (721) at least partially coincides with the outline of the projection of the inner groove (311).

4. The electromagnetic pump with the improved pump body connection structure according to claim 3, characterized in that: In the axial projection of the electromagnetic pump, the outline of the projection of the insert (700) is located radially outside the outline of the projection of the radial surface (312) of the inner groove (311).

5. The electromagnetic pump with the improved pump body connection structure according to claim 3, characterized in that: The first buckle (712) and the second buckle (722) have opposite axial protrusion directions.

6. The electromagnetic pump with the improved pump body connection structure according to claim 3 or 4, characterized in that: The first plug-in portion (710) and the second plug-in portion (720) also have columnar first and second perimeter portions (713 and 723) protruding outward from the end face of the other plug piece that they interlock with.

7. The electromagnetic pump with the improved pump body connection structure according to claim 3, characterized in that: The axial end face of the connecting part (730) has at least a pair of columnar bosses (731).

8. The electromagnetic pump with the improved pump body connection structure according to claim 1, characterized in that: The water-proof sleeve (200) has an annular mounting boss (220) on the side axially close to the pump body (300). The mounting boss (220) is located axially below the through hole. An elastic first sealing ring (810) is provided between the pump body (300) and the mounting boss (220) in the axial direction.

9. The electromagnetic pump with the improved pump body connection structure according to claim 1 or 8, characterized in that: The outer surface of the pump body (300) axially close to the water-proof sleeve (200) is radially concave to form an annular first mounting platform (320), and the inner wall surface of the pump body (300) axially close to the water-proof sleeve (200) is radially concave to form an annular second mounting platform (330). The first mounting platform (320) and the second mounting platform (330) are respectively provided with a second elastic sealing ring (820) and a third elastic sealing ring (830). In the assembled state, the first mounting platform (320) and the second mounting platform (330) are located axially below the through hole (210).

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