Electromagnetic pump with double-end-face sealing

Abstract

The electromagnetic pump comprises a pump body, a valve element and a sealing ring, the pump body is a pipe body with an inner cavity in the middle, the valve element is installed in the inner cavity in a sliding mode, the valve element is of a big-end-down two-section type structure and comprises a sliding part and a pumping part, the sliding part is installed in a water outlet channel in a sliding mode, and the pumping part is installed in the water outlet channel in a sliding mode. The pump pressure part is installed in the inner cavity in a sliding mode, the sealing ring is arranged on the lower portion of the water outlet channel, and the inner wall of the sealing ring abuts against the outer wall of the sliding part. The sealing ring is integrally formed, a first groove and a second groove are formed in the inner wall and the outer wall of the middle of the sealing ring respectively, the first groove divides the inner wall of the sealing ring into a first sealing part and a second sealing part, and the second groove is used for storing lubricating liquid. By means of the sealing ring structure with the first groove and the second groove integrally formed, the abrasion resistance and the sealing reliability of the sealing ring are improved; and the injection molding joint line of the sealing ring is arranged in the two grooves, so that poor sealing caused by extension of the joint line is avoided.

Description

Technical Field

[0001] The utility model relates to the field of solenoid valves, and particularly relates to an electromagnetic pump with double-end face sealing. Background Art

[0002] A solenoid valve is an industrial device controlled by electromagnetism. It is a basic automation component for controlling fluids and belongs to an actuator, not limited to hydraulic and pneumatic applications.

[0003] In a liquid solenoid valve, a magnetic induction coil drives a piston towards the water inlet, sucks in liquid by compressing a main spring. When the coil is powered off, the main spring releases and pushes the piston towards the water outlet direction. By this way, it makes reciprocating movements continuously. When the pressure is greater than the sealing pressure of the internal check valve and the rubber plug of the outlet check valve, the liquid flows out from the water outlet.

[0004] Background: This type of electromagnetic pump mainly relies on the reciprocating movement of the piston and the sealing ring to achieve the function of pumping water. Since the piston of this type of electromagnetic pump moves at a very high frequency, about 50 - 60 times per second, a dynamic sealing form with high wear resistance is required. The sealing ring used in the existing pump body is of O-shaped structure. This sealing structure is simple, but it also has the following deficiencies: 1. It is difficult to clean the burrs at the mold joint line position of the sealing ring (when forming the sealing ring, it is generally composed of an upper mold and a lower mold, so burrs will be generated on both the inner and outer sides of the horizontal center line position of the sealing ring, which affects the sealing performance), resulting in poor sealing; 2. The wear resistance of the sealing ring is insufficient. For the O-shaped sealing ring, its deformation is mainly the extrusion deformation at the outer end, so the deformation degree is mainly the overall deformation, and its service life is mainly determined by the material fatigue characteristics of the sealing ring. Content of the Utility Model

[0005] The main purpose of the utility model is to propose an electromagnetic pump with double-end face sealing, aiming to improve the structure of the sealing ring, ensure the sealing performance and wear resistance while ensuring the piston sealing performance, and further improve the use stability of the pump body.

[0006] To achieve the above purpose, the utility model proposes an electromagnetic pump with double-end face sealing, including:

[0007] A pump body, the pump body is a pipe body with an inner cavity in the middle. The two ends of the pipe body are installed with a water outlet part and a water inlet part. The water outlet part and the water inlet part are respectively provided with a water outlet channel and a water inlet channel. The inner diameters of the water outlet channel and the water inlet channel are smaller than the inner diameter of the inner cavity;

[0008] A valve core, the valve core is slidably installed in the inner cavity. The valve core has a two-stage structure with a smaller upper part and a larger lower part, including a sliding part and a pump pressure part. The sliding part is slidably installed in the water outlet channel, and the pump pressure part is slidably installed in the inner cavity;

[0009] A sealing ring is provided at the lower part of the water outlet channel, and the inner wall of the sealing ring abuts against the outer wall of the sliding part;

[0010] The sealing ring is integrally formed. The inner wall and the outer wall of the middle part of the sealing ring are respectively provided with a first groove and a second groove. The first groove divides the inner wall of the sealing ring into a first sealing part and a second sealing part.

[0011] The second groove is used for storing lubricating fluid.

[0012] In actual design, through the cooperation of the sliding part and the pump pressure part, the liquid flows from the water inlet channel to the water outlet channel. Therefore, there is relative guidance and sealing (to form negative pressure or internal pressure) between the sliding part and the water outlet channel. Through the integrally formed sealing ring structure with the first groove and the second groove, the wear resistance and sealing reliability of the sealing ring are increased; and the injection molding mold joint line of the sealing ring is in the two grooves, avoiding poor sealing caused by the mold joint line protruding; grease can be stored in the grooves, enabling long-term lubrication of the valve core plug and the sealing ring during movement, increasing the wear resistance of the sealing ring and extending the service life of the water pump. Description of the Drawings

[0013] Figure 1 It is a half-sectional view of the present utility model;

[0014] Figure 2 It is a half-sectional view of the sealing ring;

[0015] Figure 3 It is a sectional view of the present utility model;

[0016] Figure 4 It is a three-dimensional schematic diagram of the present utility model.

[0017] In the figure,

[0018] 1 is the pump body, 10 is the inner cavity, 11 is the water outlet part, 111 is the water outlet channel, 12 is the water inlet part, 121 is the water inlet channel,

[0019] 2 is the valve core, 20 is the inner channel, 21 is the sliding part, 22 is the pump pressure part,

[0020] 3 is the sealing ring, 31 is the first groove, 32 is the second groove, 33 is the first sealing part, 34 is the second sealing part, 35 is the injection molding mold joint line,

[0021] 4 is the main spring,

[0022] 5 is the magnetic induction coil, 51 is the internal one-way valve, 52 is the outlet one-way valve, 53 is the sealing cavity,

[0023] 6 is the buffer spring. Detailed Embodiment

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0025] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present utility model, then the directional indications are only used to explain the relative position relationship, movement conditions, etc. between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0026] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present utility model, then the descriptions of "first" or "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0027] As Figures 1 to 4 shown, an electromagnetic pump with double-end face seals includes:

[0028] A pump body 1, the pump body 1 is a pipe body with an inner cavity 10 in the middle. The two ends of the pipe body are provided with a water outlet part 11 and a water inlet part 12. The water outlet part 11 and the water inlet part 12 are respectively provided with a water outlet channel 111 and a water inlet channel 121. The inner diameters of the water outlet channel 111 and the water inlet channel 121 are smaller than the inner diameter of the inner cavity 10.

[0029] A valve core 2, the valve core 2 is slidably installed in the inner cavity 10. The valve core 2 has a two-stage structure with a smaller upper part and a larger lower part, including a sliding part 21 and a pump pressure part 22. The sliding part 21 is slidably installed in the water outlet channel 111, and the pump pressure part 22 is slidably installed in the inner cavity 10.

[0030] A sealing ring 3, the sealing ring 3 is arranged at the lower position of the water outlet channel 111. The inner wall of the sealing ring 3 abuts against the outer wall of the sliding part 21.

[0031] The sealing ring 3 is integrally formed. The inner wall and the outer wall of the middle part of the sealing ring 3 are respectively provided with a first groove 31 and a second groove 32. The first groove 31 divides the inner wall of the sealing ring 3 into a first sealing part 33 and a second sealing part 34.

[0032] The second groove 32 is used for storing lubricating fluid.

[0033] In the actual design, through the cooperation of the sliding part 21 and the pump pressure part 22, the liquid flows from the water inlet channel 121 towards the water outlet channel 111. Therefore, there is relative guiding and sealing between the sliding part 21 and the water outlet channel 111 (to form negative pressure or internal pressure). The structure of the sealing ring 3 with the first groove 31 and the second groove 32 integrally formed increases the wear resistance and sealing reliability of the sealing ring 3; and the injection molding joint line 35 of the sealing ring 3 is within the two grooves, avoiding poor sealing caused by the joint line protruding; grease can be stored in the grooves, enabling long-term lubrication during the movement of the valve core 2 and the sealing ring 3, increasing the wear resistance of the sealing ring 3 and prolonging the service life of the water pump.

[0034] Specifically, the first groove 31 and the second groove 32 are respectively provided with an injection molding joint line 35. This avoids poor sealing caused by the joint line protruding. At the same time, the second groove 32 also serves as a deformation interval, and the deformation can be transferred to the first groove 31 and the second groove 32, avoiding the internal stress problem caused by the existing solid O-ring.

[0035] In the embodiment of the present utility model, the lubricating substance is lubricating grease.

[0036] Specifically, a main spring 4 is provided between the inner cavity 10 and the pump pressure part 22. The main spring 4 can apply a pressure to the valve core 2 to slide towards the water outlet direction.

[0037] In the embodiment of the present utility model, a magnetic induction coil 5 is provided on the outer peripheral wall of the pump body 1 located in the inner cavity 10, and the valve core 2 is provided with a permanent magnet that cooperates with the magnetic induction coil 5. During actual operation, a magnetic field is generated by the magnetic induction coil 5 and rectified by a diode.

[0038] When powered on and in the positive half cycle, the valve core 2 moves towards the water inlet channel 121, compressing the main spring 4 and causing the valve core 2 to suck in the liquid.

[0039] In the negative half cycle, the coil is powered off, and the main spring 4 releases and pushes the valve core 2 towards the water outlet channel 111.

[0040] Through the continuous reciprocating movement of the valve core 2, when the pressure is greater than the sealing pressure between the internal check valve 51 and the outlet check valve 52, the liquid flows out from the water outlet channel 111.

[0041] Specifically, an internal one-way valve 51 and an outlet one-way valve 52 are arranged at intervals from bottom to top in the upper part of the water outlet channel 111, and a sealing cavity 53 is arranged between the internal one-way valve 51 and the outlet one-way valve 52.

[0042] In the embodiment of the present invention, a buffer spring 6 is sleeved on the sliding part 21. The buffer spring 6 is arranged between the upper wall of the pump pressure part 22 and the lower wall of the water outlet part 11, and is used to play a buffering role, avoid rigid collision, and at the same time reduce the wear of the sealing ring 3.

[0043] Specifically, an inner channel 20 penetrating in the length direction is arranged in the middle of the valve core 2.

[0044] In the embodiment of the present invention, the first groove 31 and the second groove 32 are in an arc transition, thereby reducing the generation of burrs, having better durability, that is, better integrity and more uniform deformation distribution.

[0045] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An electromagnetic pump with double end seals, characterized in that: include: A pump body, wherein the pump body is a tube body with an inner cavity in the middle, a water outlet and a water inlet are installed at both ends of the tube body, the water outlet and the water inlet are respectively provided with a water outlet channel and a water inlet channel, and the inner diameter of the water outlet channel and the inner diameter of the water inlet channel are smaller than the inner diameter of the inner cavity; A valve core, the valve core is slidably mounted in the inner cavity, the valve core is a two-stage structure with a small upper portion and a large lower portion, comprising a sliding portion and a pumping portion, the sliding portion is slidably mounted in the water outlet channel, and the pumping portion is slidably mounted in the inner cavity; A sealing ring, the sealing ring is arranged at the lower position of the water outlet channel, and the inner wall of the sealing ring abuts against the outer wall of the sliding part; The sealing ring is integrally formed, and the inner wall and the outer wall of the middle part of the sealing ring are respectively provided with a first groove and a second groove, and the first groove divides the inner wall of the sealing ring into a first sealing part and a second sealing part. The second groove is used for storing lubricating fluid.

2. The electromagnetic pump with double end seals according to claim 1, characterized in that: The first groove and the second groove are respectively provided with an injection mold line.

3. The electromagnetic pump with double end seals according to claim 1, characterized in that: A main spring is arranged between the inner cavity and the pump pressure part, and the main spring can exert pressure on the valve core to slide toward the water outlet.

4. The electromagnetic pump with double end seals as claimed in claim 3, characterized in that: The outer peripheral wall of the pump body located in the inner cavity is provided with a magnetic induction coil, and the valve core is provided with a permanent magnet matched with the magnetic induction coil.

5. The electromagnetic pump with double end seals according to claim 1, characterized in that: An internal one-way valve and an outlet one-way valve are arranged at intervals from bottom to top on the upper part of the water outlet channel, and a sealing cavity is arranged between the internal one-way valve and the outlet one-way valve.

6. The electromagnetic pump with double end seals according to claim 1, characterized in that: The sliding part is sleeved with a buffer spring, and the buffer spring is arranged between the upper wall of the pump pressure part and the lower wall of the water outlet part.

7. The electromagnetic pump with double end seals according to claim 1, characterized in that: The middle part of the valve core is provided with an inner channel which runs through the length direction of the valve core.

8. The electromagnetic pump with double end seals according to claim 1, characterized in that: The first groove and the second groove transition in an arc shape.

Images