An electric leakage-proof electromagnetic pump

Abstract

The utility model relates to the technical field of electromagnetic pump, especially a leakage -proof electromagnetic pump, including support casing and install in the support casing inside connecting frame, still include liquid inlet pipe, liquid outlet pipe and sealed connecting portion, and one end of liquid inlet pipe is equipped with first connecting end, and the other end is shaped with first connecting portion, and one end of liquid outlet pipe is equipped with second connecting end, and the other end is shaped with second connecting portion, sealed connecting portion includes the connecting inner shell of being simultaneously sleeved in the outside of first connecting portion and the outside of second connecting portion, still includes the connecting outer shell of being sleeved in the outside of connecting inner shell, and the outside of connecting inner shell is threadedly connected with the inside of connecting outer shell to the first connecting portion and second connecting portion are pressed tightly, the inside wall of connecting inner shell is equipped with a plurality of third sealing rings. After tightening connecting outer shell, relative force is applied to first connecting portion and second connecting portion to press them tightly, under the action that first connecting portion and second connecting portion are tightly sealed, liquid will not leak out from the gap between the two, and the leakage -proof effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic pump technology, and in particular to a leak-proof electromagnetic pump. Background Technology

[0002] An electromagnetic pump is a device that uses electromagnetic force to drive fluid transport. It is widely used in medical equipment, chemical industry, food processing, and other fields, especially in applications requiring precise control of liquid flow. Its basic principle is to generate a magnetic field through an energized coil, which drives the internal electromagnet assembly to move, thereby controlling the opening and closing of valves and achieving the intake and discharge of liquids.

[0003] In existing technologies, the inlet and outlet pipes of electromagnetic pumps are typically connected by bolts, snap-fit ​​connections, or simple sealing rings. For example, some electromagnetic pumps use a single O-ring seal placed at the connection and tightened, then secured with bolts to achieve a seal. While this structure can prevent liquid leakage to some extent, the seal is prone to wear, aging, or deformation under long-term use or high-pressure environments, leading to a decline in sealing performance. Furthermore, due to the lack of effective tightening and limiting mechanisms at the connection points, the connection is prone to loosening under vibration or temperature changes, further exacerbating the risk of leakage. Therefore, a leak-proof electromagnetic pump is provided to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a leak-proof electromagnetic pump to address the shortcomings of existing technologies, thereby solving the technical problem of poor sealing effect after the inlet and outlet pipes of existing electromagnetic pumps are connected.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A leak-proof electromagnetic pump includes a support housing and a connecting frame installed inside the support housing. The connecting frame has a through mounting hole. It also includes an inlet pipe, an outlet pipe, and a sealing connection. One end of the inlet pipe has a first connecting end, and the other end has a first connecting part. One end of the outlet pipe has a second connecting end, and the other end has a second connecting part. The sealing connection is used to seal the first connecting part and the second connecting part. The inlet pipe passes through the mounting hole and is installed on the connecting frame. The sealing connection includes a connecting inner shell that is simultaneously fitted onto the outer side of the first connection and the outer side of the second connection, and a connecting outer shell that is fitted onto the outer side of the connecting inner shell. The inner side of the connecting outer shell is threadedly connected to the outer side of the connecting inner shell to press the first connection and the second connection together. The inner wall of the connecting inner shell is provided with a plurality of third sealing rings, which are respectively filled between the outer wall of the first connection and the inner wall of the connecting inner shell, and between the second connection and the inner wall of the connecting inner shell.

[0006] Furthermore, a fourth sealing ring is provided on the side of the second connecting part away from the first connecting part, and a fifth sealing ring is provided on the inner wall of the connecting housing for contacting the second connecting part.

[0007] Furthermore, a limiting groove is formed on the side of the connecting inner shell near the supporting shell, and the supporting shell is provided with a limiting rod. When the liquid inlet pipe passes through the mounting hole and is installed on the connecting frame, the limiting rod is inserted into the limiting groove.

[0008] Furthermore, the end of the inlet pipe with the first connecting end is also provided with a convex ring. The radial dimension of the first connecting part is larger than the diameter of the mounting hole. The outer side of the support housing is provided with a spring piece for clamping the convex ring. The outer edge of the convex ring near the first connecting part is formed with a bevel. The spring piece is formed with an n-shaped groove for the convex ring to be inserted.

[0009] Furthermore, a valve tube is provided between the first connecting part and the second connecting part. A liquid guiding channel that connects the liquid inlet pipe and the liquid outlet pipe is formed inside the valve tube. A first liquid guiding chamber is formed inside the liquid inlet pipe. A valve assembly for controlling the opening and closing of the first liquid guiding chamber and the liquid guiding channel is installed inside the first liquid guiding chamber.

[0010] Furthermore, a second sealing ring is fitted on the outside of the valve tube, and the second sealing ring is placed between the first connecting part and the second connecting part to fill the gap between them.

[0011] Furthermore, a second liquid guiding chamber is formed inside the liquid outlet pipe and is connected to the liquid guiding channel. A one-way valve is movably installed in the second liquid guiding chamber to block the port of the liquid guiding channel that is close to the second liquid guiding chamber. The direction of movement of the one-way valve is consistent with the direction of liquid guiding of the liquid guiding channel. A first spring is also installed inside the second liquid guiding chamber to apply a force to the one-way valve in the direction of liquid guiding channel.

[0012] Furthermore, the valve assembly includes an electromagnet movably disposed within the first liquid guiding chamber, with a sealing plug on the side of the electromagnet near the liquid guiding channel for blocking it; it also includes a second spring disposed within the first liquid guiding chamber, one end of the second spring being connected to the inner wall of the first liquid guiding chamber, and the other end being connected to the side of the electromagnet away from the sealing plug, the second spring being used to apply a force to the electromagnet in the direction of the liquid guiding channel; the radial dimension of the electromagnet is smaller than the inner diameter of the first liquid guiding chamber.

[0013] Furthermore, a coil and a limiting sleeve for limiting the coil are wound around the outside of the inlet pipe; the connecting frame is equipped with several pins extending to the outside of the support housing, and the pins are electrically connected to the coil.

[0014] Furthermore, the inner wall of the liquid guiding channel is provided with a first sealing ring, which is used to fill the gap between the outer wall of the sealing plug and the inner wall of the liquid guiding channel.

[0015] The beneficial effects of this utility model are as follows: After the first connecting part on the inlet pipe comes into contact with the second connecting part on the outlet pipe, the inner connecting shell is simultaneously fitted onto the outside of the first connecting part and the outside of the second connecting part. After the outer connecting shell is fitted onto the outside of the inner connecting shell, the outer connecting shell is screwed to make the outer connecting shell and the inner connecting shell threaded together. After tightening, the outer connecting shell and the inner connecting shell apply relative forces to the first connecting part and the second connecting part respectively to press them together and seal the first connecting part and the second connecting part. After the seal is established, the inlet pipe and the outlet pipe are connected, and the liquid can be transported. Under the tight sealing effect of the first connecting part and the second connecting part, the liquid will not leak out from the gap between them, thus improving the leak-proof effect.

[0016] In addition, by setting several third sealing rings, the sealing performance after the first and second connecting parts are sealed together is increased, further improving the leak-proof effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0018] Figure 1 This is a three-dimensional structural diagram of a leak-proof electromagnetic pump provided by this utility model.

[0019] Figure 2 This is a three-dimensional structural diagram of an anti-leakage electromagnetic pump provided by this utility model from another perspective.

[0020] Figure 3 An exploded view of a leak-proof electromagnetic pump provided by this utility model.

[0021] Figure 4 This is an exploded view from another perspective of the leak-proof electromagnetic pump provided by this utility model.

[0022] Figure 5 This is a schematic diagram of the internal structure of the inlet pipe and outlet pipe of this utility model.

[0023] The reference numerals in the figures include: 1. Support housing; 2. Connecting bracket; 3. Mounting holes; 4. Pins; 5. Liquid inlet pipe; 51. First connecting end; 52. First connecting part; 53. First liquid guiding chamber; 54. Protruding ring; 6. Discharge pipe; 61. Second connecting end; 62. Second connecting part; 63. Second liquid guiding chamber; 64. One-way valve; 65. First spring; 7. Valve tube; 71. Liquid guide channel; 72. First sealing ring; 73. Second sealing ring; 8. Valve assembly; 81. Second spring; 82. Electromagnet; 83. Sealing plug; 84. Limit ring; 9. Limiting sleeve; 10. Coil; 11. Washer; 12. Spring clip; 121. Slot; 13. Connecting inner shell; 131. External thread; 132. Limiting groove; 133. Limiting rod; 134. Third sealing ring; 14. Connecting to the outer casing; 141. Internal thread; 15. Fourth sealing ring; 16. Fifth sealing ring. Detailed Implementation

[0024] The following is a detailed description of a leak-proof electromagnetic pump according to the present invention, with reference to the accompanying drawings.

[0025] like Figure 1-5 As shown, an embodiment of the leak-proof electromagnetic pump of this utility model includes a supporting housing 1 and a connecting frame 2 installed inside the supporting housing 1. The connecting frame 2 is formed with a through mounting hole 3. The electromagnetic pump also includes an inlet pipe 5, an outlet pipe 6 and a sealing connection part. One end of the inlet pipe 5 is provided with a first connecting end 51 and the other end is formed with a first connecting part 52. One end of the outlet pipe 6 is provided with a second connecting end 61 and the other end is formed with a second connecting part 62. The sealing connection part is used to seal the first connecting part 52 and the second connecting part 62. The inlet pipe 5 passes through the mounting hole 3 and is installed on the connecting frame 2.

[0026] After the first connecting part 52 on the inlet pipe 5 comes into contact with the second connecting part 62 on the outlet pipe 6, the first connecting part 52 and the second connecting part 62 are sealed together by the sealing connection. After the sealing connection, the inlet pipe 5 and the outlet pipe 6 are connected, and the liquid can be transported. Under the action of the sealing connection, the liquid will not leak out from the gap between the first connecting part 52 and the second connecting part 62, thus improving the leak-proof effect. The specific sealing connection method is described in detail below.

[0027] After the inlet pipe 5 and the outlet pipe 6 are sealed and connected, the inlet pipe 5 is inserted into the mounting hole 3 and fixedly installed on the connecting bracket 2. However, in order to install the inlet pipe 5, the end of the inlet pipe 5 with the first connecting end 51 is also provided with a protruding ring 54. The radial dimension of the first connecting part 52 is larger than the diameter of the mounting hole 3. The outer side of the support housing 1 is provided with a spring piece 12 for clamping the protruding ring 54. The outer edge of the protruding ring 54 near the first connecting part 52 is formed with a bevel. The spring piece 12 is formed with an n-shaped groove 121 for the protruding ring 54 to be inserted. After inserting the inlet pipe 5 into the mounting hole 3, the first connecting end 51 and the convex ring 54 are placed on one side of the connecting frame 2, and the first connecting part 52 is placed on the other side of the connecting frame 2. At this time, align the slot 121 on the spring piece 12 with the inclined edge on the convex ring 54, and bring the spring piece 12 close to the convex ring 54. The inner side of the slot 121 slides on the inclined edge of the convex ring 54, thus applying a force away from the first connecting part 52 to the convex ring 54, making the first connecting part 52 stick to the connecting frame 2. When the convex ring 54 is fully inserted into the slot 121, the spring piece 12 deforms slightly and sticks to the connecting frame 2. Continue to apply a force away from the first connecting part 52 to the convex ring 54 to achieve stable installation of the inlet pipe 5 on the connecting frame 2. After installation, connect the first connecting end 51 and the second connecting end 61 to different pipelines.

[0028] In this embodiment, a valve pipe 7 is provided between the first connecting part 52 and the second connecting part 62. A liquid guiding channel 71, simultaneously connecting the inlet pipe 5 and the outlet pipe 6, is formed within the valve pipe 7. A first liquid guiding chamber 53 is formed inside the inlet pipe 5, and a valve assembly 8 is installed within the first liquid guiding chamber 53 to control the connection and disconnection between the first liquid guiding chamber 53 and the liquid guiding channel 71. The valve assembly 8 is connected to an external power source and initially blocks the liquid guiding channel 71. When the electromagnetic pump needs to be turned on, the valve assembly 8 is controlled to operate, connecting the first liquid guiding chamber 53 to the liquid guiding channel 71, thus connecting the inlet pipe 5 and the outlet pipe 6, allowing liquid to be transported. When the electromagnetic pump needs to be turned off, the valve assembly 8 is controlled to reset, re-blocking the liquid guiding channel 71, thus disconnecting the first liquid guiding chamber 53 from the liquid guiding channel 71, preventing liquid transport. The specific structure of the valve assembly 8 will be described in detail below.

[0029] In addition, a second sealing ring 73 is provided on the outside of the valve pipe 7. The second sealing ring 73 is placed between the first connecting part 52 and the second connecting part 62 to fill the gap between them. The second sealing ring 73 is provided to improve the sealing performance after the first connecting part 52 and the second connecting part 62 are connected.

[0030] Inside the outlet pipe 6, a second liquid guiding chamber 63 is formed, which communicates with the liquid guiding channel 71. A one-way valve 64 is movably installed within the second liquid guiding chamber 63 to block the port of the liquid guiding channel 71 near the second liquid guiding chamber 63. The direction of movement of the one-way valve 64 is consistent with the liquid guiding direction of the liquid guiding channel 71. A first spring 65 is also installed inside the second liquid guiding chamber 63 to apply a force to the one-way valve 64 in the direction of the liquid guiding channel 71. The first spring 65 applies force to the one-way valve 64 to block the port of the liquid guiding channel 71 near the second liquid guiding chamber 63. However, after the valve assembly 8 connects the first liquid guiding chamber 53 with the liquid guiding channel 71, under hydraulic pressure, the one-way valve 64 is pushed open, and the first spring 65 is compressed, so that the liquid guiding channel 71 communicates with the second liquid guiding chamber 63. The liquid delivery path is sequentially the first liquid guiding chamber 53, the liquid guiding channel 71, and the second liquid guiding chamber 63. After the first liquid guiding chamber 53 is disconnected from the liquid guiding channel 71, the one-way valve 64 is pushed by the compression of the first spring 65 to block the port of the liquid guiding channel 71 near the second liquid guiding chamber 63 again, preventing liquid backflow from pushing the valve assembly 8 open.

[0031] In this embodiment, the valve assembly 8 includes an electromagnet 82 (i.e., valve core) movably disposed within the first liquid guiding chamber 53. The electromagnet 82 has a sealing plug 83 on the side near the liquid guiding channel 71 for blocking it. It also includes a second spring 81 disposed within the first liquid guiding chamber 53. One end of the second spring 81 is connected to the inner wall of the first liquid guiding chamber 53, and the other end is connected to the side of the electromagnet 82 away from the sealing plug 83. The second spring 81 is used to apply a force to the electromagnet 82 in the direction of the liquid guiding channel 71. The radial dimension of the electromagnet 82 is smaller than the inner diameter of the first liquid guiding chamber 53. When the second spring 81 is in its initial state, the sealing plug 83 is placed inside the liquid guiding channel 71 and blocks it. After applying a force to the electromagnet 82 away from the liquid guiding channel 71, the electromagnet 82 moves the sealing plug 83 away from the liquid guiding channel 71, compressing the second spring 81. After the sealing plug 83 disengages from the liquid guiding channel 71, the first liquid guiding chamber 53 is connected to the liquid guiding channel 71, allowing liquid to flow. After the force applied to the electromagnet 82 is stopped, the compression of the second spring 81 pushes the electromagnet 82 and the sealing plug 83 back to their original positions. The sealing plug 83 is then placed back inside the liquid guiding channel 71 and blocks it, disconnecting the first liquid guiding chamber 53 from the liquid guiding channel 71, thus achieving on / off control. Furthermore, after the sealing plug 83 disengages from the liquid guiding channel 71, under the supporting force of the second spring 81, the sealing plug 83 remains aligned with the liquid guiding channel 71, allowing it to smoothly reset.

[0032] A coil 10 and a limiting sleeve 9 for limiting the position of the coil 10 are wound around the outside of the inlet pipe 5. The limiting sleeve 9 is used to limit the position of the coil 10 and prevent the position of the coil 10 from shifting. The connecting frame 2 is equipped with a number of pins 4 extending to the outside of the support housing 1. The pins 4 are electrically connected to the coil 10 and are used to connect the positive and negative terminals of the power supply, thereby energizing the coil 10.

[0033] When current passes through the coil 10 wound around the outside of the liquid inlet pipe 5, according to the principle of "electromagnetism", the coil 10 generates a strong and concentrated magnetic field. The magnetic field lines will be conducted along the magnetic circuit, and the magnetic field will pass through the pipe wall of the liquid inlet pipe 5 and concentrate in the cavity inside it. The electromagnet 82 is strongly magnetized and instantly becomes a magnet. According to the principle of "opposite poles attract", the magnetized electromagnet 82 will be subjected to an electromagnetic attraction towards the center of the magnetic field (i.e., the center of the coil 10). This attraction is greater than the elastic force of the second spring 81, thereby controlling the movement of the electromagnet 82 in the first liquid guiding chamber 53.

[0034] A gasket 11 is provided at one end of the valve tube 7 near the first liquid guiding chamber 53, and a limiting ring 84 is sleeved on the outside of the sealing plug 83 for abutting against the gasket 11; when the electromagnet 82 and the sealing plug 83 are reset to the initial state, the limiting ring 84 presses against the gasket 11 to limit the electromagnet 82 and the sealing plug 83, so that the electromagnet 82 and the sealing plug 83 can move within a specified range.

[0035] A first sealing ring 72 is provided on the inner wall of the liquid guiding channel 71. The first sealing ring 72 is used to fill the gap between the outer wall of the sealing plug 83 and the inner wall of the liquid guiding channel 71, thereby improving the blocking effect of the sealing plug 83.

[0036] The sealing connection includes a connecting inner shell 13 that is simultaneously sleeved on the outside of the first connecting part 52 and the outside of the second connecting part 62, and a connecting outer shell 14 that is sleeved on the outside of the connecting inner shell 13. After applying a force to the connecting outer shell 14 in the direction of the second connecting end 61, the connecting outer shell 14 can be removed. Subsequently, after applying a force to the connecting inner shell 13 in the direction of the first connecting end 51, the connecting inner shell 13 can be removed. The inner shell 13 has an external thread 131 formed on its outer side wall, and the outer shell 14 has an internal thread 141 formed on its inner side wall for threaded connection with the external thread 131. After the first connecting part 52 and the second connecting part 62 come into contact, the inner shell 13 is fitted onto the outside of the first connecting part 52 and the second connecting part 62, and the outer shell 14 is fitted onto the outside of the inner shell 13. Then, the outer shell 14 is screwed to make the outer shell 14 and the inner shell 13 threadedly connected. After tightening, the outer shell 14 and the inner shell 13 apply relative forces to the first connecting part 52 and the second connecting part 62 respectively to press them together and achieve a sealed connection.

[0037] A plurality of third sealing rings 134 are provided on the inner sidewall of the connecting inner shell 13. The plurality of third sealing rings 134 fill the space between the outer sidewall of the first connecting part 52 and the inner sidewall of the connecting inner shell 13, and between the second connecting part 62 and the inner sidewall of the connecting inner shell 13, thereby further improving the sealing connection effect of the first connecting part 52 and the second connecting part 62.

[0038] A fourth sealing ring 15 is provided on the side of the second connecting portion 62 away from the first connecting portion 52, and a fifth sealing ring 16 is provided on the inner wall of the connecting housing 14 that contacts the second connecting portion 62. After the connecting housing 14 is tightened onto the outside of the connecting inner housing 13, both the fourth sealing ring 15 and the fifth sealing ring 16 fill the space between the second connecting portion 62 and the fifth sealing ring 16, improving the sealing performance between the second connecting portion 62 and the fifth sealing ring 16.

[0039] A limiting groove 132 is formed on the side of the connecting inner shell 13 near the supporting shell 1. The supporting shell 1 is provided with a limiting rod 133. When the liquid inlet pipe 5 passes through the mounting hole 3 and is installed on the connecting frame 2, the limiting rod 133 is inserted into the limiting groove 132. After the liquid inlet pipe 5 is fixedly installed on the connecting frame 2, the connecting inner shell 13 can be limited by the limiting rod 133 and the limiting groove 132, preventing the connecting inner shell 13 (and the liquid inlet pipe 5) from automatically rotating and deviating during the use of this electromagnetic pump.

[0040] In summary, this utility model possesses the aforementioned excellent characteristics, enabling it to achieve unprecedented efficiency in use and thus become a highly practical product.

[0041] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A leak-proof electromagnetic pump, characterized in that: The device includes a support housing (1) and a connecting frame (2) installed inside the support housing (1). The connecting frame (2) is formed with a through mounting hole (3). It also includes an inlet pipe (5), an outlet pipe (6) and a sealing connection. One end of the inlet pipe (5) is provided with a first connecting end (51) and the other end is formed with a first connecting part (52). One end of the outlet pipe (6) is provided with a second connecting end (61) and the other end is formed with a second connecting part (62). The sealing connection is used to seal the first connecting part (52) and the second connecting part (62). The inlet pipe (5) passes through the mounting hole (3) and is installed on the connecting frame (2). The sealing connection includes a connecting inner shell (13) that is simultaneously fitted on the outside of the first connecting part (52) and the outside of the second connecting part (62), and a connecting outer shell (14) fitted on the outside of the connecting inner shell (13). The inner side of the connecting outer shell (14) is threadedly connected to the outer side of the connecting inner shell (13) to press the first connecting part (52) and the second connecting part (62) together. The inner wall of the connecting inner shell (13) is provided with a plurality of third sealing rings (134). The plurality of third sealing rings (134) are respectively filled between the outer wall of the first connecting part (52) and the inner wall of the connecting inner shell (13), and between the second connecting part (62) and the inner wall of the connecting inner shell (13).

2. The anti-leakage electromagnetic pump according to claim 1, characterized in that: The second connecting part (62) is provided with a fourth sealing ring (15) on the side away from the first connecting part (52), and the inner wall of the connecting housing (14) for contacting the second connecting part (62) is provided with a fifth sealing ring (16).

3. The leak-proof electromagnetic pump according to claim 1, characterized in that: A limiting groove (132) is formed on the side of the inner shell (1) close to the supporting shell (1). The supporting shell (1) is provided with a limiting rod (133). When the liquid inlet pipe (5) passes through the mounting hole (3) and is installed on the connecting frame (2), the limiting rod (133) is inserted into the limiting groove (132).

4. The leak-proof electromagnetic pump according to claim 1, characterized in that: The inlet pipe (5) is provided with a first connecting end (51) and a protruding ring (54) is provided at the end. The radial dimension of the first connecting part (52) is larger than the diameter of the mounting hole (3). The outer side of the support housing (1) is provided with a spring piece (12) for clamping the protruding ring (54). The outer edge of the protruding ring (54) near the first connecting part (52) is formed with a bevel. The spring piece (12) is formed with an n-shaped groove (121) for the protruding ring (54) to be inserted.

5. The anti-leakage electromagnetic pump according to claim 1, characterized in that: A valve tube (7) is provided between the first connecting part (52) and the second connecting part (62). A liquid guiding channel (71) is formed inside the valve tube (7) that simultaneously connects the liquid inlet pipe (5) and the liquid outlet pipe (6). A first liquid guiding chamber (53) is formed inside the liquid inlet pipe (5). A valve assembly (8) for controlling the opening and closing of the first liquid guiding chamber (53) and the liquid guiding channel (71) is installed inside the first liquid guiding chamber (53).

6. The leak-proof electromagnetic pump according to claim 5, characterized in that: A second sealing ring (73) is fitted on the outside of the valve tube (7). The second sealing ring (73) is placed between the first connecting part (52) and the second connecting part (62) to fill the gap between them.

7. A leak-proof electromagnetic pump according to claim 5, characterized in that: The outlet pipe (6) has a second liquid guiding chamber (63) formed inside, which is connected to the liquid guiding channel (71). A one-way valve (64) is movably installed in the second liquid guiding chamber (63) to block the port of the liquid guiding channel (71) near the second liquid guiding chamber (63). The direction of movement of the one-way valve (64) is consistent with the direction of liquid guiding of the liquid guiding channel (71). A first spring (65) is also installed inside the second liquid guiding chamber (63) to apply a force to the one-way valve (64) in the direction of liquid guiding channel (71).

8. A leak-proof electromagnetic pump according to claim 5, characterized in that: The valve assembly (8) includes an electromagnet (82) movably disposed in the first liquid guiding chamber (53), and a sealing plug (83) for blocking the side of the electromagnet (82) near the liquid guiding channel (71); it also includes a second spring (81) disposed in the first liquid guiding chamber (53), one end of the second spring (81) being connected to the inner wall of the first liquid guiding chamber (53), and the other end being connected to the side of the electromagnet (82) away from the sealing plug (83), and the second spring (81) being used to apply a force to the electromagnet (82) in the direction close to the liquid guiding channel (71); the radial dimension of the electromagnet (82) is smaller than the inner diameter of the first liquid guiding chamber (53).

9. A leakage-proof electromagnetic pump according to claim 8, characterized in that: A coil (10) and a limiting sleeve (9) for limiting the coil (10) are wound around the outside of the liquid inlet pipe (5); the connecting frame (2) is equipped with a number of pins (4) extending to the outside of the support housing (1), and the pins (4) are electrically connected to the coil (10).

10. A leak-proof electromagnetic pump according to claim 8, characterized in that: The inner wall of the liquid guiding channel (71) is provided with a first sealing ring (72), which is used to fill the gap between the outer wall of the sealing plug (83) and the inner wall of the liquid guiding channel (71).

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