Anti-blocking plunger type electromagnetic pump easy to assemble

Abstract

The anti-blocking plunger type electromagnetic pump easy to assemble comprises a pump core seat and an iron core assembly, the iron core assembly comprises a hollow iron core, an iron core end socket and a spring, the pump core seat is provided with a liquid flow hole used for water outflow, a sealing bin is formed between the pump core seat and the iron core assembly, a non-return cover is arranged on the outer side of the liquid flow hole of the pump core seat, and the non-return cover is connected with the iron core assembly. The non-return cover comprises a fixed part used for being fixed to the whole and further comprises a movable part which covers the liquid flow hole of the pump core base and enables the liquid flow hole to be opened and closed under the pressure difference of the two sides. Opening and closing control over the overflow hole of the electromagnetic pump can be achieved through the pressure difference, extrusion contact with the pump core base caused by spring pressure does not exist in the power failure process, the adhesion problem of a check plug of the electromagnetic pump is solved, the assembly requirement for alignment of a plurality of accessories is avoided, and the assembly difficulty is lowered.

Description

Technical Field

[0001] An anti-blocking plunger type electromagnetic pump that is easy to assemble. Background Art

[0002] The micro electromagnetic pump applied to household appliances such as water dispensers, electric irons, coffee machines, and cleaning machines is a plunger pump driven by an electromagnetic force with a compact structure, high output pressure, and small output flow. When the electromagnetic coil is energized, the iron core moves away from the sealed chamber under the action of the electromagnetic field force, the volume of the sealed chamber increases, the pressure is less than the inlet air pressure, and the liquid flows into the sealed chamber. When the electromagnetic coil is de-energized, the iron core moves towards the sealed chamber under the action of the spring force. When the volume of the sealed chamber decreases and the pressure is greater than the outlet air pressure, the fluid flows out of the sealed chamber.

[0003] The outflow and closing of water in the existing electromagnetic pump need to be realized by the opening and closing of the check valve under the action of the spring with the water outlet of the pump core seat. Since the check valve requires a certain strength and elasticity and is easy to process, the electromagnetic pump check valve is basically made of silicone rubber. However, when the electromagnetic pump stops working, the silicone rubber check valve is pressed against the pump core seat by the spring pressure and is in a humid environment or soaked in water for a long time, and it is extremely easy to adhere to the pump core seat to form a blockage. The presence of a small amount of impurities in the water makes the adhesion more frequent. How to solve the adhesion between the check valve and the pump core seat is a problem that has been pending in the existing electromagnetic pump industry. Each manufacturer is trying to develop an anti-blocking solution.

[0004] Currently, the anti-blocking solutions in the prior art achieve a certain anti-adhesion effect through structural adjustment: for example, CN204419478U avoids the aging and adhesion problem of the rubber check valve in the hydrochloric acid liquid environment by setting a Teflon T-shaped plastic check valve; for example, CN20441980U improves the corrosion resistance and durability of the electromagnetic pump in the ethanol environment by setting a large plug and a small plug in cooperation; for example, CN204419481U solves the problem of the check valve sticking to individual liquids and causing water blockage by setting a rubber sheet. The applicant disclosed a technical solution in the patent application with the application number 201910916698.4 and the invention name of "an anti-blocking electromagnetic pump" that can solve the adhesion problem to a certain extent by forcibly pushing the connection between the check valve and the pump core seat through the movement of the first check body arranged inside the pump core.

[0005] However, the existing technical solutions all complicate the structure, increase the number of fine components that need to be matched, and increase the process difficulty. Therefore, further improvement is needed. Summary of the Invention

[0006] Aiming at the defects of the prior art, the utility model designs a check valve cover structure that is not affected by spring pressure, which not only realizes the quantitative water output of the electromagnetic pump, solves the problem of check valve adhesion, but also reduces the assembly components and assembly steps.

[0007] The specific technical solution is as follows:

[0008] An easy-to-assemble anti-blocking plunger electromagnetic pump includes a pump core seat and an iron core assembly. The iron core assembly includes a hollow iron core, an iron core head, and a spring. The pump core seat is provided with a liquid flow hole for discharging water. A sealed chamber is formed between the pump core seat and the iron core assembly. It is characterized in that a check valve cover is arranged outside the liquid flow port of the pump core seat. The check valve cover includes a fixing part for fixing with the whole, and also includes a movable part covering the liquid flow hole of the pump core seat and capable of opening and closing the liquid flow hole under the pressure difference on both sides. When the pressure in the sealed chamber is greater than the outlet pressure, the movable part leaves the liquid flow hole; when the pressure in the sealed chamber is less than the outlet pressure, the movable part presses against the liquid flow hole; when the pressure in the sealed chamber is equal to the outlet pressure, the movable part fits against the liquid flow hole but is not affected by other forces except gravity. This structure can use the pressure difference to control the opening and closing of the overflow hole of the electromagnetic pump. When powered off, there is no extrusion contact with the pump core seat due to the spring pressure, but it is in a force-free state (except gravity), reducing the problem of adhesion of the check valve plug of the electromagnetic pump, and also avoiding the assembly requirements of aligning multiple accessories, reducing the assembly difficulty.

[0009] Further, a notch is provided between the movable part and the fixing part of the check valve cover. This notch can enable water to flow out faster and more smoothly, maintain a certain flow rate, and also reduce adhesion.

[0010] Further, the check valve cover is made of a rubber material with moderate hardness. The selection criterion is to achieve no water leakage and no air leakage. Preferably, a rubber material with a Shore hardness A of 20 - 80 degrees is used.

[0011] Further, the above check valve cover can meet various structural designs.

[0012] In one embodiment, the fixing part is a cylindrical sleeve sleeved outside the pump core seat, with one end open and the other end having a hem. During assembly, it can be directly sleeved on the pump core seat, and an anti-misassembly design can be achieved.

[0013] In one embodiment, the movable part is in a "tongue" shape, and a notch can be provided between it and the fixing part; the "tongue" part can have the same thickness as the hem of the cylindrical sleeve and be in the same plane, that is, be planar relative to the overflow hole, or can be not in the same plane as the outer bottom surface of the cylindrical sleeve, such as being inclined 5° - 30° towards the plane where the overflow hole is located.

[0014] In another embodiment, the fixed part and the movable part are connected by a connecting part. The fixed part can be a cylindrical sleeve with a hem folded and sleeved outside the pump core seat, and the movable part is a disc. The cylindrical sleeve and the disc are connected by a connecting part formed by at least two rib strips. The above-mentioned connecting part and the movable part can be on the same plane as the hem of the fixed part, or the three can be not on the same plane by making the connecting part inclined or bent. For example, the movable part bulges towards the overflow hole side. This can be comprehensively selected according to space, reliability, and processability.

[0015] Furthermore, the check valve cover is integrally formed. The check valve cover is only one component, which can replace the original combination of a plug and a spring, and is simpler.

[0016] The utility model adopts a check valve cover structure including a fixed part and a movable part. The movable part can control the opening and closing of the overflow hole of the electromagnetic pump by using the pressure difference. When powered off, there is no extrusion contact with the pump core seat due to the spring pressure, but is in an unloaded state (except for gravity), reducing the problem of adhesion of the check valve plug of the electromagnetic pump, and also avoiding the assembly requirements for alignment of multiple accessories, reducing the assembly difficulty. Description of the Drawings

[0017] Figure 1 is a structural schematic diagram of Embodiment 1;

[0018] Figure 2 is an exploded assembly view of Embodiment 1;

[0019] Figure 3 is a schematic diagram of the check valve cover of Embodiment 1;

[0020] Figure 4 is a schematic diagram of the check valve cover of Embodiment 2;

[0021] Figure 5 is a schematic diagram of the check valve cover of Embodiment 3;

[0022] Figure 6 is a schematic diagram of the check valve cover of Embodiment 4;

[0023] Figure 7 is a schematic diagram of the check valve cover of Embodiment 5.

[0024] Among them, Figures 3 to 7 (a), (b), (c), (d), and (e) of respectively represent a three-dimensional schematic diagram, a top view, a bottom view, a right view, and a side sectional view.

[0025] Annotation description: 1. Water outlet cover; 2. Check valve cover; 201. Fixed part; 202. Movable part; 203. Connecting part; 204. Notch; 3. Sealing sleeve; 4. Pump core seat; 5. Pump core sleeve; 6. Iron core assembly; 601. Hollow iron core; 602. Iron core head; 603. Spring; 7. Copper tube; 8. Sealing ring. Detailed implementation mode

[0026] The following embodiments will specifically elaborate on the present utility model in conjunction with the attached drawings, and only the components related to the present utility model in the plunger type electromagnetic pump will be described, while other commonly used components will be omitted. For ease of understanding, in the following embodiments, the direction towards the sealing chamber is defined as inwards, and the direction opposite to the sealing chamber is defined as outwards. Embodiment 1

[0027] An easy-to-assemble anti-blocking plunger type electromagnetic pump, the schematic cross-sectional view thereof is as Figure 1 shown, and the assembly explosion diagram is as Figure 2 shown. The electromagnetic pump includes a pump core seat 4 and an iron core assembly 6. The iron core assembly 6 includes a hollow iron core 601, an iron core head 602, and a spring 603. The pump core seat 4 is provided with a liquid flow hole for discharging water, and the liquid flow hole is a circular through hole located at the center of the pump core seat. A sealing chamber is formed between the pump core seat 4 and the iron core assembly 6, and a liquid outlet chamber is formed between the pump core seat 4 and the water outlet cover 1. A check valve cover 2 is arranged outside the liquid flow port of the pump core seat 4. The check valve cover 2 includes a fixed part 201 for overall fixation, sleeved outside the pump core seat, formed by a cylindrical sleeve with a hem, and further includes a movable part 202 covering the liquid flow hole of the pump core seat, which can open and close the liquid flow hole under the pressure difference on both sides. The movable part is in the shape of a "tongue", and a notch 204 is formed between it and the fixed part 201. The structure of the check valve cover 2 is as Figure 3 shown. The "tongue" part can be on the same plane as the outer bottom surface (i.e., the hem) of the cylindrical sleeve and have the same thickness, that is, it is a plane relative to the overflow hole. The check valve cover 2 is an integrally formed rubber part, and a rubber material with moderate hardness is used, with the selection criterion of not leaking water and air. A rubber material with a Shore hardness of A 20 - 80 degrees is preferably used. The check valve cover 2 containing the notch 204 can make water flow out more easily, reduce the reaction time, and achieve instant opening.

[0028] During assembly, the check valve cover 2 is directly sleeved on the pump core seat 4, and the fixed part 201 is pressed and fixed between the pump core seat 4 and the water outlet cover 1. At this time, the movable part 202 also just covers the liquid flow hole. Compared with the structural design in the prior art that requires at least one check valve plug and one spring, there is only one component in this embodiment, and no operations such as alignment and adjustment are required, which can achieve foolproof assembly and reduce the assembly difficulty.

[0029] In this embodiment, when the electromagnetic pump is powered on, the iron core assembly 6 slides to the right, the volume of the sealed chamber increases and the pressure decreases, and the movable part 202 closely adheres to the liquid flow hole to block the liquid flow hole, realizing water pumping; when powered off, the iron core assembly 6 slides to the left, the volume of the sealed chamber decreases and the pressure increases, pushing the movable part 202 away from the liquid flow hole to open the liquid flow hole, realizing water discharge. When the electromagnetic pump stops working, the pressure in the sealed chamber is equal to the outlet pressure, which is a balanced state. There is no pressure difference between the inner and outer sides of the movable part 202. At this time, the movable part 202 fits against the liquid flow hole but is not subject to other forces except gravity, and is in a non-pressure contact state with the pump core seat 4. This makes it impossible for the check valve structure to adhere to the pump core seat. In the prior art, under the same conditions, the check valve plug is tightly pressed on the pump core seat by the spring action, which exacerbates the adhesion between the check valve structure and the pump core seat. Therefore, the present utility model can greatly reduce the problem of adhesion and blockage of the check valve plug of the electromagnetic pump. Embodiment 2

[0030] Except for the check valve cover 2, the rest of this embodiment is the same as that of Embodiment 1. Only the check valve cover 2 will be described below.

[0031] The check valve cover 2 includes a fixing part 201 for fixing with the whole, sleeved outside the pump core seat, and formed by a cylindrical sleeve with a hem, and further includes a movable part 202 covering the liquid flow hole of the pump core seat and capable of opening and closing the liquid flow hole under the pressure difference on both sides. The movable part 202 is circular, and the movable part 202 and the fixing part 201 are connected by a connecting part 203 to form a notch 204. The structure of the check valve cover 2 is as Figure 4 shown. The "tongue" part is not in the same plane as the outer bottom surface (i.e., the hem) of the cylindrical sleeve, and is inclined 5°-30° towards the plane where the overflow hole is located to achieve a better anti-leakage function.

[0032] The check valve cover 2 is an integrally formed rubber part, and a rubber material with moderate hardness is used. The selection criterion is to achieve no water leakage and no air leakage. A rubber material with a Shore hardness of A 20-80 degrees is preferably used. The check valve cover 2 including the notch 204 is more conducive to mold processing.

[0033] During assembly, the check valve cover 2 is directly sleeved on the pump core seat 4, and the fixing part 201 is pressed tightly between the pump core seat 4 and the water outlet cover 1 for fixation. At this time, the movable part 202 also just covers the liquid flow hole. Compared with the prior art structure design that requires at least one check valve plug and one spring, this embodiment has only one component, and there is no need for operations such as alignment and adjustment, which can achieve foolproof assembly and reduce the assembly difficulty.

[0034] In this embodiment, when the electromagnetic pump is powered on, the iron core assembly 6 slides to the right, the volume of the sealed chamber increases and the pressure decreases, and the movable part 202 closely adheres to the liquid flow hole to block the liquid flow hole, realizing water pumping; when powered off, the iron core assembly 6 slides to the left, the volume of the sealed chamber decreases and the pressure increases, pushing the movable part 202 away from the liquid flow hole to open the liquid flow hole, realizing water discharge. When the electromagnetic pump stops working, the pressure in the sealed chamber is equal to the outlet pressure, which is an equilibrium state. There is no pressure difference between the inner and outer sides of the movable part 202. At this time, the movable part 202 fits against the liquid flow hole but is not subject to other forces except gravity, and is in a non-pressure contact state with the pump core seat 4. This makes it impossible for the check valve structure to adhere to the pump core seat. In the prior art, under the same conditions, the check valve plug is tightly pressed on the pump core seat by the spring action, which exacerbates the adhesion between the check valve structure and the pump core seat. Therefore, the present utility model can greatly reduce the problem of adhesion and blockage of the check valve plug of the electromagnetic pump. Embodiment III

[0035] Except for the check valve cover 2, the rest of this embodiment is the same as that of Embodiment I. Only the check valve cover 2 will be described below.

[0036] The check valve cover 2 includes a fixing part 201 for fixing with the whole, sleeved outside the pump core seat, and formed by a cylindrical sleeve with a hem, and further includes a movable part 202 covering the liquid flow hole of the pump core seat and capable of opening and closing the liquid flow hole under the pressure difference on both sides. The fixing part 201 and the movable part 202 are connected by a connecting part 203. The structure of the check valve cover 2 is as Figure 5 shown. The movable part 202 is a circular plate, and the connecting part 203 is three rib strips connecting the fixing part 201 and the movable part 202. The rib strips bend inward, making the movable part convex toward the overflow hole side. This structure can strengthen the structural strength.

[0037] The check valve cover 2 is an integrally formed rubber part, and a rubber material with moderate hardness is used. Taking the realization of no water leakage and no air leakage as the selection standard, a rubber material with a Shore hardness of A 20 - 80 degrees is preferably used.

[0038] During assembly, the check valve cover 2 is directly sleeved on the pump core seat 4, and the fixing part 201 is pressed tightly between the pump core seat 4 and the water outlet cover 1 for fixation. At this time, the movable part 202 also just covers the liquid flow hole. Compared with the structural design in the prior art that requires at least one check valve plug and one spring, this embodiment has only one component and does not require operations such as alignment and adjustment, and can achieve foolproof assembly, reducing the assembly difficulty.

[0039] In this embodiment, when the electromagnetic pump is powered on, the core assembly 6 slides to the right, the volume of the sealed chamber increases and the pressure decreases, and the movable part 202 is close to the liquid flow hole to block the liquid flow hole, thereby achieving water pumping; when the power is off, the core assembly 6 slides to the left, the volume of the sealed chamber decreases and the pressure increases, pushing the movable part 202 away from the liquid flow hole to open the liquid flow hole, thereby achieving water discharge. When the electromagnetic pump stops working, the pressure in the sealed chamber is equal to the outlet pressure, which is in a balanced state. There is no pressure difference between the inner and outer sides of the movable part 202. At this time, the movable part 202 is close to the liquid flow hole but is not affected by other forces except gravity. It is in a pressure-free contact state with the pump core seat 4, which makes it impossible for the non-return structure to adhere to the pump core seat. In the prior art, under the same state, the non-return plug is tightly pressed on the pump core seat by the action of the spring, which aggravates the adhesion of the non-return structure to the pump core seat. Therefore, the utility model can greatly reduce the problem of adhesion and blockage of the non-return plug of the electromagnetic pump. Embodiment 4

[0040] Except for the check cover 2 , the rest of this embodiment is the same as the first embodiment, and only the check cover 2 is described below.

[0041] The check cover 2 includes a fixed portion 201 formed by a cylindrical sleeve with a folded edge and used for fixing with the whole, sleeved on the outside of the pump core seat, and also includes a movable portion 202 covering the liquid flow hole of the pump core seat and capable of opening and closing the liquid flow hole due to the pressure difference on both sides. The fixed portion 201 and the movable portion 202 are connected by a connecting portion 203. The structure of the check cover 2 is as follows Figure 6 The movable part 202 is a disc, the connecting part 203 is two ribs connecting the fixed part 201 and the movable part 202, and the outer bottom surfaces (i.e., folded edges) of the cylindrical sleeves of the connecting part 203, the movable part 202, and the fixed part 201 are flush.

[0042] The non-return cover 2 is an integrally formed rubber part, and is made of a rubber material of moderate hardness and softness, with water and air leakage being the selection criteria, and preferably a rubber material with a Shore A hardness of 20-80 degrees.

[0043] During assembly, the check cover 2 is directly placed on the pump core seat 4, and the fixing part 201 is pressed between the pump core seat 4 and the water outlet cover 1 to fix it. At this time, the movable part 202 also just covers the liquid flow hole. Compared with the structural design in the prior art that requires at least one check plug and one spring, this embodiment has only one component and does not require alignment, adjustment, etc., which can achieve foolproof assembly and reduce assembly difficulty.

[0044] In this embodiment, when the electromagnetic pump is powered on, the core assembly 6 slides to the right, the volume of the sealed chamber increases and the pressure decreases, and the movable part 202 is close to the liquid flow hole to block the liquid flow hole, thereby achieving water pumping; when the power is off, the core assembly 6 slides to the left, the volume of the sealed chamber decreases and the pressure increases, pushing the movable part 202 away from the liquid flow hole to open the liquid flow hole, thereby achieving water discharge. When the electromagnetic pump stops working, the pressure in the sealed chamber is equal to the outlet pressure, which is in a balanced state. There is no pressure difference between the inner and outer sides of the movable part 202. At this time, the movable part 202 is close to the liquid flow hole but is not affected by other forces except gravity. It is in a pressure-free contact state with the pump core seat 4, which makes it impossible for the non-return structure to adhere to the pump core seat. In the prior art, under the same state, the non-return plug is tightly pressed on the pump core seat by the action of the spring, which aggravates the adhesion of the non-return structure to the pump core seat. Therefore, the utility model can greatly reduce the problem of adhesion and blockage of the non-return plug of the electromagnetic pump. Embodiment 5

[0045] Except for the check cover 2 , the rest of this embodiment is the same as the first embodiment, and only the check cover 2 is described below.

[0046] The check cover 2 includes a fixed portion 201 formed by a cylindrical sleeve with a folded edge and used for fixing with the whole, sleeved on the outside of the pump core seat, and also includes a movable portion 202 covering the liquid flow hole of the pump core seat and capable of opening and closing the liquid flow hole due to the pressure difference on both sides. The fixed portion 201 and the movable portion 202 are connected by a connecting portion 203. The structure of the check cover 2 is as follows Figure 7 The movable part 202 is a disc, the connecting part 203 is two ribs connecting the fixed part 201 and the movable part 202, the outward surfaces of the cylindrical sleeve bottom surfaces of the connecting part 203, the movable part 202, and the fixed part 201 (i.e., the outer surfaces of the folded edges) are flush, but the movable part 202 is convex facing the overflow hole, and this design is conducive to sealing the water and realizing rapid opening and closing.

[0047] The non-return cover 2 is an integrally formed rubber part, and is made of a rubber material of moderate hardness and softness, with water and air leakage being the selection criteria, and preferably a rubber material with a Shore A hardness of 20-80 degrees.

[0048] During assembly, the check cover 2 is directly placed on the pump core seat 4, and the fixing part 201 is pressed between the pump core seat 4 and the water outlet cover 1 to fix it. At this time, the movable part 202 also just covers the liquid flow hole. Compared with the structural design in the prior art that requires at least one check plug and one spring, this embodiment has only one component and does not require alignment, adjustment, etc., which can achieve foolproof assembly and reduce assembly difficulty.

[0049] In this embodiment, when the electromagnetic pump is powered on, the iron core assembly 6 slides to the right, the volume of the sealed chamber increases and the pressure decreases, and the movable part 202 presses tightly against the liquid flow hole to block the liquid flow hole, realizing water pumping; when powered off, the iron core assembly 6 slides to the left, the volume of the sealed chamber decreases and the pressure increases, pushing the movable part 202 away from the liquid flow hole to open the liquid flow hole, realizing water discharge. When the electromagnetic pump stops working, the pressure in the sealed chamber is equal to the outlet pressure, which is an equilibrium state. There is no pressure difference between the inside and outside of the movable part 202. At this time, the movable part 202 fits against the liquid flow hole but is not subject to other forces except gravity, and is in a non-pressure contact state with the pump core seat 4. This makes it impossible for the check structure and the pump core seat to adhere to each other. In the prior art, under the same conditions, the check valve plug is tightly pressed against the pump core seat by the action of the spring, which exacerbates the adhesion between the check structure and the pump core seat. Therefore, the present utility model can greatly reduce the problem of adhesion and blockage of the check valve plug of the electromagnetic pump.

[0050] The above is only the preferred embodiment of the present utility model, which is illustrative rather than restrictive to the present utility model. For example, the check valve cover can have a simpler structure and can be formed by cutting a circular rubber sheet. It can be cut along the edge of the overflow hole or a cross can be drawn from the center. The part of the circular rubber sheet that is not deformed under the pressure difference on both sides forms the fixed part, and the part that can be opened and closed under the pressure difference on both sides forms the movable part. Those skilled in the art understand that many changes, modifications, and equivalents can be made within the spirit and scope defined by the claims of the present utility model, but all will fall within the protection scope of the present utility model.

Claims

1. An easy-to-assemble anti-blocking plunger electromagnetic pump, comprising a pump core seat and an iron core assembly, the iron core assembly comprising a hollow iron core, an iron core head, and a spring, the pump core seat is provided with a liquid flow hole for water discharge, and a sealed chamber is formed between the pump core seat and the iron core assembly, characterized in that: A check cover is arranged outside the liquid flow port of the pump core seat, and the check cover includes a fixing part for fixing with the whole, and also includes a movable part covering the liquid flow hole of the pump core seat and enabling the liquid flow hole to be opened and closed by the pressure difference on both sides.

2. The easy-to-assemble anti-blocking plunger electromagnetic pump according to claim 1, characterized in that: A gap is arranged between the movable part and the fixed part.

3. The easy-to-assemble anti-blocking plunger electromagnetic pump according to claim 1 or 2, characterized in that: The fixing part is a cylindrical sleeve which is sleeved on the outer side of the pump core seat, has an opening at one end and a folded edge at the other end.

4. The easy-to-assemble anti-blocking plunger electromagnetic pump according to claim 3, characterized in that: The movable portion is a "tongue" shaped portion.

5. The easy-to-assemble anti-blocking plunger electromagnetic pump according to claim 4, characterized in that: The "tongue"-shaped portion has the same thickness as the folded edge of the cylindrical sleeve and is on the same plane.

6. The easy-to-assemble anti-blocking plunger electromagnetic pump according to claim 4, characterized in that: The "tongue"-shaped portion is inclined 5°-30° toward the overflow hole.

7. The easy-to-assemble anti-blocking plunger electromagnetic pump according to claim 1 or 2, characterized in that: The non-return cover also includes a connecting portion connecting the fixed portion and the movable portion.

8. The easy-to-assemble anti-blocking plunger electromagnetic pump according to claim 7, characterized in that: The fixed part is a cylindrical sleeve with a folded edge and sleeved on the outside of the pump core seat, the movable part is a disc, and the connecting part is at least two ribs connecting the cylindrical sleeve and the disc.

9. The easy-to-assemble anti-blocking plunger electromagnetic pump according to claim 8, characterized in that: The movable portion, the connecting portion and the folded edge of the cylindrical sleeve are in the same plane.

10. The easy-to-assemble anti-blocking plunger electromagnetic pump according to claim 8, characterized in that: The connecting portion is inclined or bent toward the overflow hole so that the movable portion protrudes toward one side of the overflow hole.

11. The easy-to-assemble anti-blocking plunger electromagnetic pump according to claim 1, characterized in that: The non-return cover is integrally formed.

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