Sealing structure of three-head electromagnetic valve channel

Abstract

The utility model belongs to the technical field of electromagnetic valves, and particularly relates to a sealing structure of a three-head electromagnetic valve channel, which comprises a three-head valve body, three fluid pipelines are arranged in the three-head valve body, expansion mechanisms are arranged in the fluid pipelines, and each expansion mechanism comprises a rubber sealing ring. And the rubber sealing ring expands in the fluid pipeline and is in contact with the inner wall of the fluid pipeline for sealing. According to the sealing structure of the three-head electromagnetic valve channel, after a threaded shaft is driven to rotate and an expansion disc conducts displacement change in the vertical direction, a pushing plate can drive a contact arc plate to push outwards along the inner wall of a limiting sliding groove, and therefore circular ring expansion of a rubber sealing ring is achieved; therefore, the gap between the inner wall of the fluid pipeline and the outer surface of the rubber sealing ring can be adjusted, then the fluid flow is adjusted, and the sealing effect can be achieved after the outer surface of the rubber sealing ring is completely in contact with the inner wall of the fluid pipeline.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and in particular to a sealing structure for a three-head solenoid valve channel. Background Technology

[0002] A three-pole solenoid valve is a type of solenoid valve typically used in systems that require control of three different channels. A key feature of a three-pole solenoid valve is that it can independently control three different fluid channels within the same valve body. It is suitable for systems that require multiple fluid channels to work in coordination and is commonly used in the inlet valve of a drum washing machine.

[0003] Chinese patent CN222702632U discloses a highly airtight two-position three-way solenoid valve. Over-compression of the A sealing gasket causes it to deform and fill the A sealing groove, preventing fluid in the exhaust channel from entering the solenoid assembly through gaps. A B sealing gasket is provided between the second step of the limiting member and the B sealing groove. During installation, compression of the B sealing gasket causes it to deform and fill the B sealing groove, preventing fluid in the exhaust channel from entering the exhaust channel through gaps, thus achieving a sealing effect.

[0004] However, the above technical solution only uses gasket A and gasket B for sealing, resulting in a limited adjustment range, relatively simple sealing and flow control capabilities, that is, it cannot control the size of the fluid flow rate, and has low mechanical strength. This is because the sealing gasket is expanded by squeezing the valve body up and down to achieve sealing, but the sealing gasket lacks internal support after lateral expansion. Therefore, the present invention solves the shortcomings of the above technical problems. Utility Model Content

[0005] Based on the aforementioned technical problems, this utility model proposes a sealing structure for a three-head solenoid valve channel.

[0006] This utility model proposes a sealing structure for a three-headed solenoid valve channel, including a three-headed valve body. The three-headed valve body has three fluid pipes inside, and an expansion mechanism is provided inside the fluid pipes. The expansion mechanism includes a rubber sealing ring, which expands inside the fluid pipes and seals them after contacting their inner walls.

[0007] Preferably, the expansion mechanism further includes a drive threaded shaft rotatably connected to the upper surface of the fluid pipe via a bearing. The drive threaded shaft extends to the outer surface inside the fluid pipe and is mounted with two support circular plates via bearings. The support shaft is fixedly connected to the opposite side surfaces of the two support circular plates in a ring array. The inner surface of the rubber sealing ring is fixedly sleeved with the outer surface of the support circular plates.

[0008] In order to achieve the sealing of the fluid pipeline and isolate the fluid through the above technical solution, the support shaft limits the position of the two support circular plates. The support circular plates support the rubber sealing ring inside the fluid pipeline. As the rubber sealing ring expands, the gap between the inner wall of the fluid pipeline and the outer surface of the rubber sealing ring can be adjusted, thereby adjusting the fluid flow rate. When the outer surface of the rubber sealing ring is in complete contact with the inner wall of the fluid pipeline, the sealing effect can be achieved.

[0009] Preferably, the expansion mechanism further includes three expansion discs with diameters increasing sequentially from bottom to top, which are threaded onto the outer surface of the drive threaded shaft, and connecting rods are fixedly connected to the opposite side surfaces of each pair of expansion discs.

[0010] In order to expand the rubber sealing ring, the above technical solution involves setting up three expansion discs of different diameters, which are connected by a connecting rod and move synchronously. As the drive threaded shaft rotates, the expansion discs change their vertical displacement, which in turn pushes the rubber sealing ring to expand.

[0011] Preferably, the expansion mechanism further includes limiting grooves arranged in a ring array on the opposite side surfaces of the two supporting circular plates, wherein a push plate in the shape of a right trapezoid is slidably engaged with the inner wall of the limiting groove, and the inclined surface of the push plate is slidably engaged with the inner wall of the groove on the surface of the expansion plate.

[0012] With the above technical solution, in order to expand the rubber sealing ring after the expansion plate moves, as the large-diameter expansion plate moves downward, the push plate can be pushed outward along the inner wall of the limiting groove, and then the push plate can push and expand the rubber sealing ring.

[0013] Preferably, a contact arc plate is fixedly connected to the vertical side surface of the push plate.

[0014] In order to achieve close contact between the push plate and the inner surface of the rubber sealing ring through the above technical solution, the rubber sealing ring is expanded by pushing the contact arc plate, thereby improving the sealing performance of the three-head solenoid valve channel. In addition, the contact arc plate is made of stainless steel, thereby increasing the mechanical strength of the expansion mechanism.

[0015] Preferably, gearboxes are fixedly connected to the upper surface of the three-head valve body at intervals, and a drive motor for driving the drive threaded shaft to rotate is installed on one side of the gearboxes.

[0016] In order to achieve the expansion and sealing performance of the rubber sealing ring by driving the threaded shaft to rotate, the drive motor drives the threaded shaft to rotate through the gear set in the gearbox, thereby realizing the displacement adjustment of the expansion plate. As the expansion plate moves, the gap between the rubber sealing ring and the fluid pipeline can be adjusted, that is, the flow rate of the fluid can be adjusted.

[0017] The beneficial effects of this utility model are as follows:

[0018] By setting an expansion mechanism, the rubber sealing ring can expand within the fluid pipeline, adjusting the gap between it and the inner wall to regulate the fluid flow rate. During adjustment, the expansion plate is displaced vertically by rotating the drive threaded shaft, causing the push plate to push outward along the inner wall of the limiting groove, thus expanding the rubber sealing ring. As the rubber sealing ring expands, the gap between the inner wall of the fluid pipeline and the outer surface of the rubber sealing ring can be adjusted, thereby regulating the fluid flow rate. When the outer surface of the rubber sealing ring is fully in contact with the inner wall of the fluid pipeline, a seal is achieved. Furthermore, the drive threaded shaft and expansion plate inside the rubber sealing ring provide support, thereby improving the mechanical strength of the sealing structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the sealing structure of a three-head solenoid valve channel proposed in this utility model;

[0020] Figure 2 A three-dimensional view of the rubber sealing ring structure of the sealing structure of a three-head solenoid valve channel proposed in this utility model;

[0021] Figure 3 A perspective view of the supporting circular plate structure of the sealing structure of a three-head solenoid valve channel proposed in this utility model;

[0022] Figure 4 This is a perspective view of the expansion disc structure of the sealing structure of a three-head solenoid valve channel proposed in this utility model.

[0023] In the diagram: 1. Three-head valve body; 2. Fluid pipeline; 3. Rubber sealing ring; 4. Drive threaded shaft; 5. Support circular plate; 6. Support shaft; 7. Expansion plate; 8. Connecting rod; 9. Limiting groove; 10. Push plate; 11. Contact arc plate; 12. Gearbox; 13. Drive motor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figures 1-4 A sealing structure for a three-head solenoid valve channel includes a three-head valve body 1. The three-head valve body 1 has three fluid pipes 2 inside. The fluid pipes 2 have an expansion mechanism inside. The expansion mechanism includes a rubber sealing ring 3. The rubber sealing ring 3 expands inside the fluid pipe 2 and seals after contacting its inner wall.

[0026] To achieve a seal inside the fluid pipe 2 and isolate the fluid, the expansion mechanism also includes a drive threaded shaft 4 rotatably connected to the upper surface of the fluid pipe 2 via bearings. The drive threaded shaft 4 extends to the outer surface inside the fluid pipe 2 and is mounted with two support circular plates 5 via bearings. Support shafts 6 are fixedly connected to the opposite side surfaces of the two support circular plates 5 in a ring array. The inner surface of the rubber sealing ring 3 is fixedly sleeved with the outer surface of the support circular plates 5. The support shafts 6 limit the position of the two support circular plates 5. The support circular plates 5 support the rubber sealing ring 3 inside the fluid pipe 2. As the rubber sealing ring 3 expands, the gap between the inner wall of the fluid pipe 2 and the outer surface of the rubber sealing ring 3 can be adjusted, thereby adjusting the fluid flow rate. When the outer surface of the rubber sealing ring 3 is in complete contact with the inner wall of the fluid pipe 2, a seal is achieved.

[0027] To achieve the expansion of the rubber sealing ring 3, the expansion mechanism also includes three expansion discs 7 with diameters increasing sequentially from bottom to top, which are threaded onto the outer surface of the drive threaded shaft 4. Connecting rods 8 are fixedly connected to the opposite side surfaces of each pair of expansion discs 7. The three expansion discs 7 with different diameters are connected by the connecting rods 8 and move synchronously. As the drive threaded shaft 4 rotates, the expansion discs 7 change their vertical displacement, which can push the rubber sealing ring 3 to expand.

[0028] In order to expand the rubber sealing ring 3 after the expansion plate 7 moves, the expansion mechanism also includes limiting grooves 9 arranged in a ring array on the opposite side surfaces of the two supporting circular plates 5. The inner wall of the limiting groove 9 is slidably engaged with a push plate 10 in the shape of a right trapezoid. The inclined surface of the push plate 10 is slidably engaged with the inner wall of the groove on the surface of the expansion plate 7. As the large-diameter expansion plate 7 moves downward, the push plate 10 can be pushed outward along the inner wall of the limiting groove 9, thereby expanding the rubber sealing ring 3.

[0029] In order to achieve tight contact between the push plate 10 and the inner surface of the rubber sealing ring 3, a contact arc plate 11 is fixedly connected to the vertical side surface of the push plate 10. The contact arc plate 11 pushes the rubber sealing ring 3 to expand the ring, thereby improving the sealing performance of the three-head solenoid valve channel. The contact arc plate 11 is made of stainless steel, thereby increasing the mechanical strength of the expansion mechanism.

[0030] In order to achieve the expansion and sealing performance of the rubber sealing ring 3 by rotating the drive threaded shaft 4, a gearbox 12 is fixedly connected to the upper surface of the three-head valve body 1 at intervals. A drive motor 13 is installed on one side of the gearbox 12 to drive the drive threaded shaft 4 to rotate. The drive motor 13 drives the rotation of the drive threaded shaft 4 through the gear set in the gearbox 12, thereby realizing the displacement adjustment of the expansion plate 7. As the expansion plate 7 moves, the gap between the rubber sealing ring 3 and the fluid pipeline 2 can be adjusted, that is, the flow rate of the fluid can be adjusted.

[0031] By setting an expansion mechanism, the rubber sealing ring 3 can expand within the fluid pipe 2, and the gap between it and the inner wall can be adjusted to regulate the fluid flow rate. During the adjustment process, the expansion plate 7 is displaced vertically by driving the threaded shaft 4 to rotate. This causes the push plate 10 to push the contact arc plate 11 outward along the inner wall of the limiting groove 9, thereby expanding the rubber sealing ring 3. As the rubber sealing ring 3 expands, the gap between the inner wall of the fluid pipe 2 and the outer surface of the rubber sealing ring 3 can be adjusted, thus regulating the fluid flow rate. When the outer surface of the rubber sealing ring 3 is in complete contact with the inner wall of the fluid pipe 2, a sealing effect can be achieved. Furthermore, the drive threaded shaft 4 and the expansion plate 7 inside the rubber sealing ring 3 provide support, thereby improving the mechanical strength of the sealing structure.

[0032] Working principle: In a specific embodiment of this invention, when fluid is input into different fluid pipes 2, in order to control the flow rate, the drive motor 13 drives the threaded shaft 4 to rotate through the gear set in the gearbox 12. As the drive threaded shaft 4 rotates, the expansion plate 7 changes displacement in the vertical direction, which allows the push plate 10 to push the contact arc plate 11 outward along the inner wall of the limiting groove 9, thereby realizing the annular expansion of the rubber sealing ring 3. As the rubber sealing ring 3 expands, the gap between the inner wall of the fluid pipe 2 and the outer surface of the rubber sealing ring 3 can be adjusted, thereby adjusting the flow rate. When the outer surface of the rubber sealing ring 3 is completely in contact with the inner wall of the fluid pipe 2, a sealing effect can be achieved.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sealing structure of a three-way electromagnetic valve passage, comprising a three-way valve body (1), characterized in that: The three-head valve body (1) has three fluid pipes (2) inside. The fluid pipes (2) are equipped with an expansion mechanism. The expansion mechanism includes a rubber sealing ring (3). The rubber sealing ring (3) expands inside the fluid pipes (2) and contacts its inner wall to seal.

2. The sealing structure of a three-head solenoid valve channel according to claim 1, characterized in that: The expansion mechanism also includes a drive threaded shaft (4) rotatably connected to the upper surface of the fluid pipe (2) via a bearing. The drive threaded shaft (4) extends to the outer surface inside the fluid pipe (2) and is mounted with two support circular plates (5) via bearings. The two support circular plates (5) are fixedly connected to the support shaft (6) in a ring array on opposite sides. The inner surface of the rubber sealing ring (3) is fixedly sleeved with the outer surface of the support circular plate (5).

3. The sealing structure of a three-head solenoid valve channel according to claim 2, characterized in that: The expansion mechanism also includes three expansion discs (7) with diameters increasing sequentially from bottom to top, which are threaded onto the outer surface of the drive threaded shaft (4). A connecting rod (8) is fixedly connected to the opposite side surface of each pair of expansion discs (7).

4. The sealing structure of a three-head solenoid valve channel according to claim 3, characterized in that: The expansion mechanism also includes limiting grooves (9) arranged in a ring array on the opposite side surfaces of the two supporting circular plates (5). The inner wall of the limiting groove (9) is slidably engaged with a push plate (10) in the shape of a right trapezoid. The inclined surface of the push plate (10) is slidably engaged with the inner wall of the groove on the surface of the expansion plate (7).

5. The sealing structure of a three-head solenoid valve channel according to claim 4, characterized in that: The vertical side surface of the push plate (10) is fixedly connected to a contact arc plate (11).

6. The sealing structure of a three-head solenoid valve channel according to claim 5, characterized in that: The upper surface of the three-head valve body (1) is fixedly connected with gearboxes (12) at intervals, and a drive motor (13) for driving the drive threaded shaft (4) to rotate is installed on one side of the gearboxes (12).

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