CN214035998U

CN214035998U - Electromagnetic water pump

Info

Publication number: CN214035998U
Application number: CN202021818321.XU
Authority: CN
Inventors: 童承勋
Original assignee: Yuyao Hongbiao Electromechanical Equipment Co ltd
Current assignee: Yuyao Hongbiao Electromechanical Equipment Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-08-24
Anticipated expiration: 2030-08-26

Abstract

The utility model provides an electromagnetic water pump, which comprises an electromagnetic device and a conveying device, wherein the conveying device comprises a plunger pipe and a conveying shell, the plunger pipe is provided with a water inlet, and the conveying shell is provided with a water outlet; the plunger assembly is arranged inside the plunger tube, and the electromagnetic device drives the plunger assembly to slide relative to the plunger tube so as to change the volume and pressure values of the first pressure chamber and the second pressure chamber; the conveying shell is provided with a first one-way valve, the conveying shell is located at the water outlet and is provided with a second one-way valve, the second cavity is located between the first one-way valve and the second one-way valve to form an isolation cavity, the conveying shell is provided with a side water drainage pipe communicated with the isolation cavity, and a pressure control device is arranged in the side water drainage pipe. The utility model provides an electromagnetic water pump, which increases the application range of the electromagnetic water pump and is beneficial to prolonging the service life of the electromagnetic water pump; prevent that the electromagnetism water pump from receiving leading to inside continuous pressure boost even inefficacy under outside extreme pressure strikes, effectively promote the operating efficiency.

Description

Electromagnetic water pump

Technical Field

The utility model belongs to the technical field of the water pump, more specifically say, relate to an electromagnetic water pump.

Background

The electromagnetic water pump is a device which utilizes the interaction between a magnetic field and current in conductive fluid to make the fluid generate pressure gradient under the action of electromagnetic force, so that the current in the magnetic field flows in a certain direction under the action of the electromagnetic force. The existing electromagnetic water pump is composed of two stages of sealing one-way valves and a single pressure cavity formed between the two sealing one-way valves, an external application product is connected with a water outlet of the electromagnetic water pump externally, the operating environment requirement of the electromagnetic water pump is to ensure that a preceding stage operates under the working condition of no pressure or low pressure (far less than the working pressure of the product), when the pressure of the preceding stage is greater than the lowest pressure for starting a pump body, the two one-way valves in the water pump cannot be normally opened, so that the electromagnetic water pump cannot normally operate and is in a failure state; meanwhile, the internal structure of the electromagnetic water pump is composed of two sealing one-way valves and a single pressure cavity formed between the two sealing one-way valves, and according to the working principle of the electromagnetic water pump, when any one sealing one-way valve has a problem, the electromagnetic water pump is in a failure state. Because the external application product is of a great variety, the external environment required to be dealt with at the water outlet of the electromagnetic water pump cannot be estimated, when the water outlet of the electromagnetic water pump is connected with an external product, the one-way valve at the water outlet can bear the pressure impact from different external environments under extreme conditions, when the external pressure is too large, the one-way valve at the water outlet is easy to break down and cannot be opened, the internal pressure of the electromagnetic water pump is further increased continuously, the risk of failure of the electromagnetic water pump exists, and the operation efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electromagnetic water pump to solve the electromagnetic water pump that exists among the prior art under extreme pressure strikes, the one-way valve that very easily appears electromagnetic water pump delivery port department can't normally be opened, leads to the inside technical problem who constantly pressurizes or even became invalid of electromagnetic water pump.

In order to achieve the above object, the utility model adopts the following technical scheme: the electromagnetic water pump comprises an electromagnetic device and a conveying device arranged in the electromagnetic device, wherein the conveying device comprises a plunger pipe with a first cavity and a conveying shell fixedly connected with the plunger pipe and provided with a second cavity, a water inlet communicated with the first cavity is formed in one end, far away from the conveying shell, of the plunger pipe, and a water outlet communicated with the second cavity is formed in one side, far away from the plunger pipe, of the conveying shell; a plunger assembly which divides the first cavity into a first pressure cavity and a second pressure cavity is arranged in the plunger tube, and the electromagnetic device drives the plunger assembly to slide relative to the plunger tube so as to change the volume and the pressure value of the first pressure cavity and the second pressure cavity; the conveying shell is internally provided with a first one-way valve used for controlling the communication or isolation of the first cavity and the second cavity, the conveying shell is located at the water outlet and is provided with a second one-way valve, the second cavity is located between the first one-way valve and the second one-way valve to form an isolation cavity, the conveying shell is provided with a side water drainage pipe communicated with the isolation cavity, and a pressure control device used for adjusting the pressure value of the isolation cavity is arranged in the side water drainage pipe.

In one embodiment, the side drain pipe comprises a first flow guide channel and a second flow guide channel which are arranged side by side and communicated with the isolation cavity, and the pressure control device comprises a pressure limiting one-way valve arranged in the first flow guide channel and a pressure relief one-way valve arranged in the second flow guide channel.

In one embodiment, the pressure-limiting one-way valve comprises a pressure-limiting sealing element which is arranged at one end of the first flow guide channel and is communicated with the isolation cavity, a pressure-limiting limit buckle which is arranged at the other end of the first flow guide channel, and a pressure-limiting reset element which is arranged between the pressure-limiting sealing element and the pressure-limiting limit buckle; the pressure relief check valve comprises a pressure relief sealing element, a pressure relief limiting buckle and a pressure relief reset element, wherein the pressure relief sealing element is arranged at one end of the second diversion channel and communicated with the isolation cavity, the pressure relief limiting buckle is arranged at the other end of the second diversion channel, and the pressure relief reset element is arranged between the pressure relief sealing element and the pressure relief limiting buckle.

In one embodiment, the first check valve comprises a first sealing rubber head and a first tower spring, the first sealing rubber head is arranged at a port of the plunger pipe in a covering mode, one end of the first tower spring is connected with the first sealing rubber head, and the other end of the first tower spring abuts against the inner wall of the conveying shell.

In one embodiment, the second check valve includes a second packing rubber head and a second tower spring, one end of the second tower spring is connected to the second packing rubber head, and the other end of the second tower spring abuts against the inner wall of the conveying shell.

In one embodiment, a third one-way valve is arranged at the water inlet of the plunger pipe, the third one-way valve comprises a third sealing rubber head and a third tower spring, one end of the third tower spring is connected with the third sealing rubber head, and the other end of the third tower spring abuts against the inner wall of the plunger pipe.

In one embodiment, the plunger assembly comprises a hollow iron core communicating the first pressure chamber and the second pressure chamber, and a fourth one-way valve is arranged at the end of the iron core located in the first pressure chamber.

In one embodiment, the plunger assembly further comprises a return spring disposed in the second pressure chamber, one end of the return spring abuts against the end of the iron core, and the other end of the return spring abuts against the inner wall of the plunger tube.

In one embodiment, the electromagnetic device includes a magnetically conductive frame and a coil disposed within the magnetically conductive frame, the coil being wound around a circumferential outer wall of the plunger tube.

In one embodiment, the electromagnetic device further comprises a magnetic yoke ring arranged between the coil and the plunger tube, and the magnetic yoke ring is sleeved on the circumferential outer surface of the plunger tube.

The utility model provides an electromagnetic water pump's beneficial effect lies in: compared with the prior art, the utility model discloses electromagnetic water pump is through being provided with conveyor in electromagnetic device's inside, conveyor comprises the plunger pipe that has first cavity and the transport casing that just has the second cavity with plunger pipe fixed connection, be provided with the water inlet that communicates with first cavity in the one end of keeping away from transport casing of plunger pipe, be provided with the delivery port that communicates with the second cavity in the one side of keeping away from the plunger pipe of transport casing, be provided with the plunger subassembly that divides the first cavity into first pressure chamber and second pressure chamber in the inside of plunger pipe, after the fluid got into the second pressure chamber by the water inlet, drive plunger subassembly through electromagnetic device and slide in order to change the volume and the pressure value of first pressure chamber and second pressure chamber relative to the plunger pipe, carry the fluid in the second pressure chamber to the first pressure chamber; a first one-way valve used for controlling the communication or isolation of the first cavity and the second cavity is arranged in the conveying shell, a second one-way valve is arranged at the water outlet of the conveying shell, an isolation cavity is formed between the first one-way valve and the second one-way valve in the second cavity and is positioned between the first pressure cavity and the water outlet, and the isolation cavity is positioned between the first pressure cavity and the water outlet and can isolate the internal environment and the external environment of the electromagnetic water pump when the water outlet of the electromagnetic water pump is connected with an external product; a side drain pipe communicated with the isolation cavity is formed in the side face of the conveying shell in an extending mode, a pressure control device used for adjusting the pressure value of the isolation cavity is arranged in the side drain pipe, air in the electromagnetic water pump is discharged through the pressure control device in the side drain pipe, the lowest pressure value in the isolation cavity is kept in a normal atmospheric pressure state, when the electromagnetic water pump is started to be in a normal operation state, the pressure control device discharges low-pressure air or fluid with extremely low flow in the electromagnetic water pump, the fluid in the first pressure cavity can be conveyed into the isolation cavity, and the application range of the electromagnetic water pump is enlarged; when the pressure of the external connecting part is higher, the fluid in the isolation cavity can be discharged through the pressure control device, so that the self-protection effect is achieved, and the service life of the electromagnetic water pump is prolonged; when the fluid in the isolation cavity reaches a certain amount, the pressure control device stops working, the pressure value in the isolation cavity is increased, the fluid in the isolation cavity flows through the second one-way valve and flows out of the water outlet, the phenomenon that the electromagnetic water pump is continuously pressurized and even fails under the impact of external extreme pressure is prevented, and the working efficiency is effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic sectional view of an electromagnetic water pump according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a cross-sectional structure of an electromagnetic water pump according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1-an electromagnetic device; 11-a magnetically conductive frame; 12-a coil; 13-a yoke ring; 2-a conveying device; 21-plunger tube; 211-a water inlet; 212-a plunger assembly; 2121-iron core; 2122-a fourth one-way valve; 2123-a return spring; 213-a first pressure chamber; 214-a second pressure chamber; 215-a third one-way valve; 2151-third sealant head; 2152-third tower spring; 22-a transport housing; 221-a water outlet; 222-a first one-way valve; 2221-first sealant head; 2222-first tower spring; 223-a second one-way valve; 2231-a second sealant head; 2232-a second tower spring; 224-an isolated cavity; 225-side drain; 2251-a first flow-directing channel; 2252-a second flow-directing passage; 226-a pressure limiting one-way valve; 2261-pressure limiting seal; 2262-pressure limiting and position limiting buckle; 2263-pressure limiting reset; 227-pressure relief check valve; 2271-pressure relief seal; 2272-pressure relief stop button; 2273-pressure relief reset.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to fig. 2, the electromagnetic water pump provided in this embodiment includes an electromagnetic device 1 and a conveying device 2 disposed inside the electromagnetic device 1, where specific structures of the electromagnetic device 1 and the conveying device 2 are not limited; the conveying device 2 comprises a plunger tube 21 with a first cavity and a conveying shell 22 fixedly connected with the plunger tube 21 and provided with a second cavity, a water inlet 211 communicated with the first cavity is formed in one end, far away from the conveying shell 22, of the plunger tube 21, and a water outlet 221 communicated with the second cavity is formed in one side, far away from the plunger tube 21, of the conveying shell 22; the plunger tube 21 is internally provided with a plunger assembly 212 which divides the first cavity into a first pressure chamber 213 and a second pressure chamber 214, and the electromagnetic device 1 drives the plunger assembly 212 to slide relative to the plunger tube 21 so as to change the volume and pressure values of the first pressure chamber 213 and the second pressure chamber 214; the conveying shell 22 is internally provided with a first one-way valve 222 for controlling the communication or isolation of the first cavity and the second cavity, the conveying shell 22 is positioned at the water outlet 221 and is provided with a second one-way valve 223, the second cavity is positioned between the first one-way valve 222 and the second one-way valve 223 to form an isolation cavity 224, the side surface of the conveying shell 22 extends to form a side water drainage pipe 225 communicated with the isolation cavity 224, and a pressure control device for adjusting the pressure value of the isolation cavity 224 is arranged in the side water drainage pipe 225. Specifically, after the fluid enters the second pressure chamber 214 from the water inlet 211, the plunger assembly 212 is driven by the electromagnetic device 1 to slide relative to the plunger tube 21 so as to change the volume and pressure values of the first pressure chamber 213 and the second pressure chamber 214, and the fluid in the second pressure chamber 214 is conveyed into the first pressure chamber 213; the air inside the electromagnetic water pump is discharged through the pressure control device in the side drain pipe 225, and the internal pressure value of the isolation chamber 224 is maintained in the atmospheric pressure state. Specifically, when the electromagnetic water pump is started to a normal operation state, air or fluid with a very small flow rate inside the electromagnetic water pump is discharged through the pressure control device, and the pressure value in the isolation cavity 224 is smaller than that of the first pressure cavity 213, so that the fluid in the first pressure cavity 213 can be conveyed into the isolation cavity 224; when the fluid in the isolation cavity 224 reaches a certain amount, the certain amount of fluid pushes the pressure limiting check valve 226 in the side drain pipe 225 to close the pressure limiting check valve, and at the same time, the pressure value in the isolation cavity 224 is increased, so that the fluid in the isolation cavity 224 flows through the second check valve 223 and flows out of the water outlet 221, thereby preventing the electromagnetic water pump from being continuously pressurized or even failing due to external extreme pressure impact, and effectively improving the operation efficiency.

In the electromagnetic water pump, the conveying device 2 is arranged in the electromagnetic device 1, the conveying device 2 is composed of the plunger pipe 21 with the first cavity and the conveying shell 22 fixedly connected with the plunger pipe 21 and provided with the second cavity, the connection mode between the plunger pipe 21 and the conveying shell 22 is not limited, and optionally, the plunger pipe 21 and the conveying shell 22 are fixedly connected in a threaded connection mode, so that the assembly and the disassembly are convenient; preferably, a sealing ring is arranged at the joint between the plunger pipe 21 and the conveying shell 22, so that the sealing performance of the electromagnetic water pump is guaranteed; a water inlet 211 communicated with the first cavity is arranged at one end of the plunger tube 21 far away from the conveying shell 22, a water outlet 221 communicated with the second cavity is arranged at one side of the conveying shell 22 far away from the plunger tube 21, a plunger assembly 212 for dividing the first cavity into a first pressure cavity 213 and a second pressure cavity 214 is arranged in the plunger tube 21, and after fluid enters the second pressure cavity 214 from the water inlet 211, the plunger assembly 212 is driven by the electromagnetic device 1 to slide relative to the plunger tube 21 so as to change the volume and pressure values of the first pressure cavity 213 and the second pressure cavity 214 and convey the fluid in the second pressure cavity 214 into the first pressure cavity 213; a first one-way valve 222 used for controlling the communication or isolation of the first cavity and the second cavity is arranged in the conveying shell 22, a second one-way valve 223 is arranged at the water outlet 221 of the conveying shell 22, an isolation cavity 224 is formed between the first one-way valve 222 and the second one-way valve 223 in the second cavity, the isolation cavity 224 is arranged between the first pressure cavity 213 and the water outlet 221, and when the water outlet 221 of the electromagnetic water pump is connected with an external product, the isolation cavity 224 can isolate the internal environment and the external environment of the electromagnetic water pump; the conveying shell 22 is provided with a side water drainage pipe 225 communicated with the isolation cavity 224, a pressure control device used for adjusting the pressure value of the isolation cavity 224 is arranged in the side water drainage pipe 225, air in the electromagnetic water pump is discharged through the pressure control device in the side water drainage pipe 225, the internal pressure value of the isolation cavity 224 is kept in a normal atmospheric pressure state, so that when the electromagnetic water pump is started to be in a normal operation state, air or fluid with extremely small flow rate in the electromagnetic water pump is discharged through the pressure control device, the pressure value in the isolation cavity 224 is smaller than the pressure value of the first pressure cavity 213, the fluid in the first pressure cavity 213 can be conveyed into the isolation cavity 224, and the application range of the electromagnetic water pump is enlarged; when the external environment pressure is high, the fluid in the isolation cavity 224 can be discharged through the pressure control device, so that the self-protection effect is achieved, and the service life of the electromagnetic water pump is prolonged; when the fluid in the isolation cavity 224 reaches a certain amount, the certain amount of fluid pushes the pressure limiting one-way valve 226 in the side drain pipe 225 to close the pressure limiting one-way valve, and at the moment, the pressure value in the isolation cavity 224 is increased, so that the fluid in the isolation cavity 224 flows through the second one-way valve 223 and flows out from the water outlet 221, thereby preventing the electromagnetic water pump from being continuously pressurized or even failing due to external extreme pressure impact, and effectively improving the operation efficiency.

Referring to fig. 1, as a specific implementation manner of the electromagnetic water pump provided in this embodiment, the electromagnetic device 1 includes a magnetic conductive frame 11 and a coil 12 disposed in the magnetic conductive frame 11, the coil 12 is wound on a circumferential outer wall of the plunger tube 21, a portion of the coil 12 penetrating through the magnetic conductive frame 11 is electrically connected to an external ac power source, and a voltage of the ac power source is changed into a half-cycle voltage through a rectification function of a rectifier diode inside the coil 12 or externally connected to the coil 12, that is, in one cycle of the ac power source, the half-cycle is a positive current or a negative current, and no current flows in the half-cycle; the iron core 2121 of the plunger assembly 212 can be driven to slide relative to the plunger tube 21 by the electromagnetic force generated after the coil 12 is electrified so as to change the volume and the pressure value of the first pressure chamber 213 and the second pressure chamber 214, and the water suction and discharge functions of the electromagnetic water pump are realized.

Optionally, the electromagnetic device 1 further includes a yoke ring 1313 disposed between the coil 12 and the plunger tube 21, the yoke ring 1313 is sleeved on the circumferential outer surface of the plunger tube 21, and the yoke ring 1313 is disposed between the coil 12 and the plunger tube 21, so that leakage flux of the coil 12 is effectively restrained from diffusing outwards, and the sensing efficiency is improved.

Referring further to fig. 1, in the present embodiment, the plunger tube 21 of the electromagnetic water pump is provided with a third check valve 215 at the water inlet 211, when the internal pressure of the second pressure chamber 214 decreases, the fluid is injected into the second pressure chamber 214 through the water inlet 211 against the resistance of the third check valve 215, and the fluid in the second pressure chamber 214 cannot flow back to the outside; the specific structure of the third check valve 215 is not limited herein, the third check valve 215 includes a third sealing rubber head 2151 and a third tower spring 2152, one end of the third tower spring 2152 is connected to the third sealing rubber head 2151, the other end of the third tower spring 2152 abuts against the inner wall of the plunger tube 21, and the third tower spring 2152 applies pressure to the third sealing rubber head 2151 to seal the second pressure chamber 214, so as to isolate the internal environment and the external environment of the electromagnetic water pump, thereby effectively increasing the working efficiency of the plunger assembly 212, and facilitating to ensure the performance and the flow stability of the electromagnetic water pump.

Referring to fig. 1 to 2, in the present embodiment, the plunger assembly 212 includes a hollow core 2121 communicating the first pressure chamber 213 and the second pressure chamber 214, a fourth check valve 2122 is disposed at an end of the core 2121 located at the first pressure chamber 213, when the internal pressure of the second pressure chamber 214 increases, the fluid inside the second pressure chamber 214 is delivered from the second pressure chamber 214 to the first pressure chamber 213 through the hollow core 2121 against the resistance of the fourth check valve 2122, and the fluid inside the first pressure chamber 213 cannot flow back into the second pressure chamber 214 through the hollow core 2121, and the specific structure of the fourth check valve 2122 is not limited herein. The plunger assembly 212 further includes a return spring 2123 disposed in the second pressure chamber 214, and one end of the return spring 2123 abuts against an end of the iron core 2121 and the other end abuts against an inner wall of the plunger tube 21. When in a power-on half period, the iron core 2121 of the plunger assembly 212 moves downwards under the action of the magnetic force of the coil 12 to compress the return spring 2123, the volume of the second pressure chamber 214 decreases, the internal pressure thereof increases, the volume of the first pressure chamber 213 increases, the internal pressure thereof decreases, and the fluid in the second pressure chamber 214 overcomes the resistance of the fourth check valve 2122 under the combined action of the pressure of the second pressure chamber 214 and the suction force of the first pressure chamber 213, is injected into the first pressure chamber 213 through the hollow iron core 2121, and fills the first pressure chamber 213; when the half period is in which no current flows, the magnetic force of the coil 12 disappears, and the iron core 2121 moves upward under the elastic force of the return spring 2123, the internal volume of the second pressure chamber 214 increases, the pressure thereof decreases, and the external fluid overcomes the resistance of the third check valve 215 under the action of the atmospheric pressure and is injected into the second pressure chamber 214 through the water inlet 211, thereby completing the process of water absorption of the second pressure chamber 214 through the water inlet 211; at this time, the iron core 2121 moves upward, the internal volume of the first pressure chamber 213 decreases, the internal pressure thereof increases, and the fluid in the first pressure chamber 213 is injected into the isolation chamber 224 against the resistance of the first check valve 222 by the pressure inside the first pressure chamber 213, thereby completing the process of delivering the fluid to the isolation chamber 224. The specific structure of the first check valve 222 is not limited herein, and optionally, the first check valve 222 includes a first sealant 2221 and a first tower spring 2222 covering the port of the plunger tube 21, one end of the first tower spring 2222 is connected to the first sealant 2221, the other end of the first tower spring 2222 abuts against the inner wall of the delivery casing 22, and the first sealant 2221 is pressurized by the first tower spring 2222 to seal the first pressure chamber 213, and at the same time, the first chamber and the second chamber can be controlled to be communicated or separated.

Referring to fig. 2, in the present embodiment, a first check valve 222 for controlling the communication or isolation between the first cavity and the second cavity is disposed inside the conveying shell 22, a second check valve 223 is disposed at the water outlet 221 of the conveying shell 22, an isolation cavity 224 is formed between the first check valve 222 and the second check valve 223 in the second cavity, and when the electromagnetic water pump is connected to an external product, the internal environment and the external environment of the electromagnetic water pump are isolated; the specific structure of the second check valve 223 is not limited, and optionally, the second check valve 223 includes a second sealing rubber head 2231 and a second tower spring 2232, one end of the second tower spring 2232 is connected to the second sealing rubber head 2231, and the other end of the second tower spring 2232 abuts against the inner wall of the delivery casing 22, and the second sealing rubber head 2231 is pressurized by the second tower spring 2232, and cooperates with the first check valve 222 to seal the isolation cavity 224.

Further, the side drain pipe 225 includes a first flow guide channel 2251 and a second flow guide channel 2252 which are arranged side by side and both communicate with the isolation cavity 224, and the pressure control device includes a pressure limiting check valve 226 arranged in the first flow guide channel 2251 and a pressure relief check valve 227 arranged in the second flow guide channel 2252; the side drain pipe 225 can be externally connected to the atmosphere or in a return water tank, the pressure limiting check valve 226 is arranged in the first flow guide channel 2251, the fluid flow of the pressure limiting check valve 226 is limited within a minimum preset range, when the fluid flow is increased and exceeds the maximum value of the preset range of the releasable fluid flow which can be supported by the pressure limiting check valve 226, the pressure limiting check valve 226 is closed, when the fluid flow is reduced to the preset range of the pressure limiting check valve 226, the pressure limiting check valve 226 is opened, so that the electromagnetic water pump is in a non-pressure state when being started to a normal operation state, the fluid in the first pressure cavity 213 can be conveyed to the isolation cavity 224, the application range of the electromagnetic water pump is enlarged, when the external environment is higher, the self-protection effect can be achieved, and the service life of the electromagnetic water pump can be prolonged; the specific structure of the pressure limiting check valve 226 is not limited herein, and optionally, the pressure limiting check valve 226 includes a pressure limiting sealing member 2261 disposed at one end of the first flow guiding passage 2251 and communicated with the isolation chamber 224, a pressure limiting stopper 2262 disposed at the other end of the first flow guiding passage 2251, and a pressure limiting reset member 2263 disposed between the pressure limiting sealing member 2261 and the pressure limiting stopper 2262, when the fluid flow exceeds the maximum value of the preset range of the releasable fluid flow that the pressure limiting check valve 226 can support, the pressure limiting sealing member 2261 compresses the pressure limiting reset member 2263 and abuts against the pressure limiting stopper 2262, the pressure limiting check valve 226 is closed, at which time the pressure value in the isolation chamber 224 is increased, so that the fluid in the isolation chamber 224 flows out from the water outlet 221 against the resistance of the second check valve 223, when the fluid flow decreases to the preset range of the pressure limiting check valve 226, the pressure limiting reset member 2263 resets and pushes the pressure limiting sealing member 2261 to move away from the pressure limiting stopper 2262, opening the pressure limiting check valve 226; preferably, the pressure limiting return 2263 is a spring.

Further, by arranging the pressure relief check valve 227 on the second flow guide channel 2252, when the electromagnetic water pump is connected to an external product and the pressure of the external environment is higher than the maximum pressure that can be generated by the electromagnetic water pump, the pressure relief check valve 227 is opened and releases a part of the pressure, so that the internal pressure value of the isolation cavity 224 is lower than the maximum pressure that can be generated by the electromagnetic water pump, and the fluid inside the first pressure cavity 213 can flow into the isolation cavity 224 by overcoming the resistance of the first check valve 222, thereby preventing the electromagnetic water pump from being damaged, playing a role of self-protection, and being beneficial to prolonging the service life of the electromagnetic water pump; the specific structure of the pressure relief check valve 227 is not limited herein, and optionally, the pressure relief check valve 227 includes a pressure relief sealing member 2271 disposed at one end of the second guide passage 2252 and communicating with the isolation chamber 224, a pressure relief stopper 2272 disposed at the other end of the second guide passage 2252, and a pressure relief returning member 2273 disposed between the pressure relief sealing member 2271 and the pressure relief stopper 2272; when the pressure value in the isolation cavity 224 is greater than a preset value, the preset value is smaller than or equal to the maximum pressure which can be generated by the electromagnetic water pump, the pressure relief sealing element 2271 compresses the pressure relief resetting element 2273, the pressure relief check valve 227 is opened and partial pressure is released, the electromagnetic water pump is prevented from being damaged, and a self-protection effect is achieved; preferably, the pressure relief reset 2273 is a spring.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an electromagnetic water pump, includes electromagnetic means and sets up the conveyor in electromagnetic means's inside which characterized in that: the conveying device comprises a plunger pipe with a first cavity and a conveying shell fixedly connected with the plunger pipe and provided with a second cavity, a water inlet communicated with the first cavity is formed in one end, far away from the conveying shell, of the plunger pipe, and a water outlet communicated with the second cavity is formed in one side, far away from the plunger pipe, of the conveying shell; a plunger assembly which divides the first cavity into a first pressure cavity and a second pressure cavity is arranged in the plunger tube, and the electromagnetic device drives the plunger assembly to slide relative to the plunger tube so as to change the volume and the pressure value of the first pressure cavity and the second pressure cavity; the conveying shell is internally provided with a first one-way valve used for controlling the communication or isolation of the first cavity and the second cavity, the conveying shell is located at the water outlet and is provided with a second one-way valve, the second cavity is located between the first one-way valve and the second one-way valve to form an isolation cavity, the conveying shell is provided with a side water drainage pipe communicated with the isolation cavity, and a pressure control device used for adjusting the pressure value of the isolation cavity is arranged in the side water drainage pipe.

2. The electromagnetic water pump of claim 1, wherein: the side drain pipe comprises a first flow guide channel and a second flow guide channel which are arranged side by side and communicated with the isolation cavity, and the pressure control device comprises a pressure limiting one-way valve arranged on the first flow guide channel and a pressure relief one-way valve arranged on the second flow guide channel.

3. The electromagnetic water pump of claim 2, wherein: the pressure limiting one-way valve comprises a pressure limiting sealing element which is arranged at one end of the first flow guide channel and is communicated with the isolation cavity, a pressure limiting limit buckle which is arranged at the other end of the first flow guide channel, and a pressure limiting reset element which is arranged between the pressure limiting sealing element and the pressure limiting limit buckle; the pressure relief check valve comprises a pressure relief sealing element, a pressure relief limiting buckle and a pressure relief reset element, wherein the pressure relief sealing element is arranged at one end of the second diversion channel and communicated with the isolation cavity, the pressure relief limiting buckle is arranged at the other end of the second diversion channel, and the pressure relief reset element is arranged between the pressure relief sealing element and the pressure relief limiting buckle.

4. The electromagnetic water pump of claim 1, wherein: the first check valve comprises a first sealing rubber head and a first tower spring, the first sealing rubber head is arranged at the end opening of the plunger pipe in a covering mode, one end of the first tower spring is connected with the first sealing rubber head, and the other end of the first tower spring is abutted to the inner wall of the conveying shell.

5. The electromagnetic water pump of claim 1, wherein: the second check valve comprises a second sealing rubber head and a second tower spring, one end of the second tower spring is connected with the second sealing rubber head, and the other end of the second tower spring is abutted against the inner wall of the conveying shell.

6. The electromagnetic water pump of claim 1, wherein: the plunger pipe is located the water inlet is provided with the third check valve, the third check valve includes third sealing rubber head and third tower spring, the one end of third tower spring with the third sealing rubber head is connected, the other end of third tower spring with the inner wall butt of plunger pipe.

7. The electromagnetic water pump of claim 1, wherein: the plunger assembly comprises a hollow iron core communicated with the first pressure cavity and the second pressure cavity, and a fourth one-way valve is arranged at the end part of the iron core, located at the first pressure cavity.

8. The electromagnetic water pump of claim 7, wherein: the plunger assembly further comprises a return spring arranged in the second pressure cavity, one end of the return spring is abutted to the end portion of the iron core, and the other end of the return spring is abutted to the inner wall of the plunger tube.

9. The electromagnetic water pump according to any one of claims 1-8, wherein: the electromagnetic device comprises a magnetic conduction frame and a coil arranged in the magnetic conduction frame, and the coil is wound on the circumferential outer wall of the plunger tube.

10. The electromagnetic water pump of claim 9, wherein: the electromagnetic device further comprises a magnetic yoke ring arranged between the coil and the plunger tube, and the magnetic yoke ring is sleeved on the circumferential outer surface of the plunger tube.