Mute electromagnetic valve

Abstract

The utility model relates to the field of electromagnetic valves, and discloses a mute electromagnetic valve. The mute electromagnetic valve comprises a framework provided with a cavity, a coil is arranged on the peripheral wall of the framework, a movable iron core and a static iron core are coaxially arranged in the cavity, a mute pad is arranged at the end, facing the movable iron core, of the static iron core in a sleeved mode, a protruding ring is arranged at the end, facing the movable iron core, of the mute pad, and when the movable iron core and the static iron core attract each other, the movable iron core and the static iron core attract each other. Through the design that the annular end face of the convex ring abuts against the end face of the movable iron core, the impact contact area generated when the movable iron core and the static iron core are attracted is reduced, and the impact noise generated when the movable iron core and the static iron core are attracted can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic valves, in particular to a silent electromagnetic valve. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics and are basic automation components used to control fluid media. The main working principle is to use the magnetization of the coil after it is energized to make the moving iron core and the static iron core close together, thereby achieving regulation and control of the direction, flow rate, speed, etc. of the medium. However, since the moving iron core and the static iron core close together at a high speed and with a large impact force, a large noise will be generated due to the impact during the closing, causing noise pollution. Utility Model Content

[0003] The utility model aims to provide a silent solenoid valve, which makes the silent solenoid valve stable and reliable and can effectively reduce the noise when the moving iron core and the static iron core are attracted.

[0004] In order to solve the above technical problems, the implementation method of the utility model provides a technical solution as follows:

[0005] A silent solenoid valve comprises a skeleton provided with a cavity, a coil is provided on the outer peripheral wall of the skeleton, a moving iron core and a static iron core are coaxially provided in the cavity, a silent pad is sleeved on one end of the static iron core facing the moving iron core, and the silent pad is provided with a convex ring facing the moving iron core, and when the moving iron core and the static iron core are attracted, the convex ring abuts and seals against the end face of the moving iron core.

[0006] Furthermore, the noise-reducing pad includes an annular side wall connected to the static iron core, a limiting portion is provided on the inner side of the annular side wall, and limiting grooves are provided on the static iron core corresponding to the limiting portion, and the limiting portion is clamped and fixed to the limiting groove.

[0007] Furthermore, an air blocking ring is provided on the outer side of the annular side wall, and the air blocking ring abuts and seals against the inner wall of the cavity.

[0008] Furthermore, a guide hole is provided at one end of the static iron core facing the moving iron core, an elastic component is provided in the guide hole, one end of the elastic component abuts against the bottom of the guide hole, and the other end abuts against the end surface of the moving iron core.

[0009] Furthermore, the guide hole is coaxially arranged with the sound-absorbing pad, and the diameter of the guide hole is smaller than the diameter of the convex ring. The static iron core is coaxially provided with a second valve port with the guide hole, and the second valve port is connected with the guide hole.

[0010] Furthermore, one end of the cavity close to the moving iron core is radially contracted to form a first valve port, and one end of the moving iron core facing the first valve port is provided with a sealing gasket.

[0011] Furthermore, the sealing gasket includes a top wall and a connecting wall extending vertically along an edge of the top wall, and the connecting wall is sleeved on the end of the moving iron core.

[0012] Furthermore, a stopping portion is provided on the inner side of the connecting wall, and a stopping groove is provided on the moving iron core corresponding to the stopping portion, and the stopping portion is clamped and fixed to the stopping groove.

[0013] Furthermore, the first valve port is provided with a sealing portion toward the sealing gasket, the cross-sectional dimension of the sealing portion gradually decreases along the axial direction of the first valve port, and the end of the sealing portion with a smaller cross-sectional dimension faces the sealing gasket.

[0014] Furthermore, the size of the cross section of the convex ring gradually decreases along the axial direction of the convex ring, and the end of the convex ring with a smaller cross section faces the moving iron core.

[0015] Compared with the prior art, the silent battery valve provided by the utility model reduces the impact contact area of ​​the moving iron core and the static iron core during adsorption through the design of the annular end face of the convex ring of the silent pad abutting against the end face of the moving iron core, and can effectively reduce the impact noise generated by the adsorption of the moving iron core and the static iron core. Through the direct contact between the elastic component and the hard fitting surface of the moving iron core, the moving iron core and the static iron core react more quickly during the magnetic adsorption process, and are beneficial to increasing the durability and stability of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 This is a schematic diagram of the appearance structure of the silent solenoid valve in the embodiment of the utility model;

[0018] Figure 2 This is a cross-sectional view of a silent solenoid valve in an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the skeleton structure of the silent solenoid valve in the embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the iron frame structure of the silent solenoid valve in the embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the static iron core in the embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the moving iron core in the embodiment of the utility model;

[0023] Figure 7 This is a schematic diagram of the sealing gasket structure in an embodiment of the utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the sound-proof pad in the embodiment of the utility model;

[0025] Fig. 9 It is a schematic diagram of the axial cross-section structure of the convex ring of the silent pad in the embodiment of the utility model.

[0026] Explanation of the reference numerals: 1. Skeleton; 11. First valve port; 12. Cavity; 13. Third valve port; 14. Sealing portion; 2. Iron frame; 21. First leg; 211. First clamping portion; 22. Second leg; 221. Second clamping portion; 23. Top plate; 3. Coil; 4. Static iron core; 41. Guide hole; 42. Second valve port; 43. Suction end; 431. Limiting groove; 44. Clamping groove; 5. Moving iron core; 51. Connecting head; 511. Stopping groove; 52. Suction surface; 6. Elastic component; 7. Sealing pad; 71. Top wall; 72. Connecting wall; 73. Stopping portion; 8. Silent pad; 81. Side wall; 82. Air blocking ring; 83. Convex ring; 84. Center hole; 85. Limiting portion; 86. End face. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] like Figure 1-9 In one embodiment of the utility model, a silent solenoid valve includes a skeleton 1, wherein the skeleton 1 is provided with a cavity 12 which penetrates along the axial direction, wherein a static iron core 4 and a moving iron core 5 are provided in the cavity 12, wherein a coil 3 is wound around the outer peripheral wall corresponding to the skeleton 1 and the cavity 12, and an iron frame 2 is also fixedly provided on the skeleton 1, and by energizing the coil 3, the iron frame 2, the moving iron core 5, and the static iron core 4 are magnetized to form a magnetic circuit structure, thereby generating a magnetic force, and under the action of the magnetic force, the moving iron core 5 and the static iron core 4 are attracted to move to open or close the valve port.

[0030] like Figure 2 , 3 As shown, the skeleton 1 is provided with a through cavity 12 along the axial direction, and the cavity 12 is radially contracted at one end near the moving iron core 5 to form a first valve port 11. The skeleton 1 is provided with a third valve port 13 perpendicular to the first valve port 11, and the third valve port 13 is connected to the cavity 12.

[0031] like Figure 4 As shown, it also includes an iron frame 2, which includes a top plate 23, and a first leg 21 and a second leg 22 extending vertically along two opposite sides of the top plate 23, the first leg 21 is provided with a first clamping portion 211, the first clamping portion 211 is a U-shaped notch, the open end of the first clamping portion 211 faces the static iron core 4, and is clamped and fixed to the static iron core 4, the second leg 22 is provided with a second clamping portion 221, the second clamping portion 221 is a U-shaped notch, the open end of the second clamping portion 221 faces the skeleton 1, and is clamped and fixed to the skeleton 1.

[0032] like Figure 2 , 5 As shown in Figure 6, in one embodiment of the utility model, a connector 51 is provided at one end of the moving iron core 5 facing the first valve port 11, and a suction surface 52 is provided at one end of the moving iron core 5 facing the static iron core 4, and the diameter of the suction surface 52 is slightly smaller than the diameter of the moving iron core 5; the static iron core 4 is provided with a countersunk hole along the central axis, and the countersunk hole is a guide hole 41 at one end of the moving iron core 5, and the other end is the second valve port 42, and the inner diameter of the guide hole 41 is larger than the inner diameter of the second valve port 42, and an elastic component 6 is provided in the guide hole 41, one end of the elastic component 6 abuts against the bottom of the guide hole 41, and the other end abuts against the suction surface 52 of the moving iron core 5, and the elastic component 6 is in a compressed state. In the absence of external force, the moving iron core 5 causes the connector 51 to tightly seal the first valve port 11 under the rebound force of the elastic component 6. Preferably, the elastic component 6 is a compression spring, and the two ends of the elastic component 6 are in direct contact with the moving iron core 5 and the static iron core 4 respectively, so that the two ends of the elastic component 6 are in hard contact. Compared with the design of the abutment between the elastic component 6 and the elastic material in the prior art, the elastic component 6 provides more direct and quick feedback of the force between the moving iron core 5 and the static iron core 4. At the same time, the hard contact between the elastic component 6 and the suction surface 52 is beneficial to maintaining the stroke stability of the moving iron core 5, and is beneficial to increasing the stability and durability of the solenoid valve.

[0033] In one embodiment, the end of the static iron core 4 away from the moving iron core 5 is provided with a slot 44 corresponding to the first clamping portion 211, and the iron frame 2 and the static iron core 4 are clamped and fixed with the first clamping portion 211 and the slot 44, and the end of the static iron core 4 facing the moving iron core 5 is an attraction end 43, and a soundproof pad 8 is provided between the attraction end 43 and the attraction surface 52, and the soundproof pad 8 includes an annular side wall 81, and an end face 86 extending vertically toward the central axis along one end of the side wall 81, and the end The surface 86 is provided with a center hole 84 for accommodating the elastic component 6 to pass through, the center hole 84 is coaxially arranged with the guide hole 41, and the diameter of the center hole 84 is larger than the diameter of the guide hole 41, and a convex ring 83 is axially protruded along the end of the center hole 84 on the end surface 86, the convex ring 83 is coaxially arranged with the guide hole 41, and the diameter of the guide hole 41 is smaller than the diameter of the convex ring 83, when the moving iron core 5 and the static iron core 4 are attracted, the convex ring 83 abuts and seals with the attraction surface 52. The convex ring 83 is arranged to abut with the attraction surface 52 through an annular cross section, which effectively reduces the contact area between the attraction surface 52 and the mute pad 8 when the moving iron core 5 and the static iron core 4 are attracted and collided, compared with the arrangement of using a circular plane sealing pad to abut with the attraction surface 52, thereby reducing the noise caused by the attraction and collision between the moving iron core 5 and the mute pad 8.

[0034] like Figure 8 , 9 As shown, preferably, the soundproof pad 8 is made of elastic material, such as rubber, silicone, etc., and the size of the cross section of the convex ring 83 gradually decreases along the axial direction of the convex ring, and the end of the convex ring 83 with a smaller cross section faces the moving iron core 5. When the moving iron core 5 moves toward the static iron core 4 under the action of magnetic adsorption, it first contacts the end with a smaller cross section, so that the convex ring 83 is compressed and deformed to produce a side tilt, and the gap between the sealed center hole 84 and the suction surface 52 is sealed under the action of magnetic force. The design that the size of the cross section of the convex ring 83 gradually decreases along the axial direction of the convex ring can not only further reduce the contact area between the suction surface 52 and the soundproof pad 8 at the beginning of the adsorption collision between the moving iron core 5 and the static iron core 4, and effectively reduce the noise caused by the adsorption collision between the moving iron core 5 and the soundproof pad 8, but also can increase the sealing area between the soundproof pad 8 and the suction surface 52 under the action of the adsorption force, thereby increasing the sealing effect.

[0035] In one embodiment, a limiting portion 85 is provided on the inner side of one end of the side wall 81 of the silent pad 8 away from the convex ring 83, and a limiting groove 431 is provided at the suction end 43 corresponding to the limiting portion 85. The silent pad 8 is sleeved on the suction end 43, and the limiting portion 85 is fixedly arranged in the limiting groove 431, so that the connection between the silent pad 8 and the suction end 43 is more stable and not easy to fall off; an annular air blocking ring 82 is provided on the outer periphery of the side wall 81 of the silent pad 8, and the air blocking ring 82 abuts against the inner wall of the cavity 12, so as to seal the gap between the suction end 43 and the cavity 12 to prevent gas leakage.

[0036] like Figure 2 , 7 As shown, in one embodiment, a sealing gasket 7 is provided between the connecting head 51 and the second valve port 42, and the sealing gasket 7 is sleeved on the connecting head 51. The connecting head 51 is provided with a stopping groove 511, and the stopping groove 511 is a radial contraction groove. The sealing gasket 7 includes a top wall 71, and a connecting wall 72 extending vertically along the periphery of the top wall 71. A stopping portion 73 is provided on the inner side of one end of the connecting wall 72 away from the top wall 71, and the stopping portion 73 is arranged corresponding to the stopping groove 511. When the sealing gasket 7 is connected to the connecting head 51, the stopping portion 73 is accommodated in the stopping groove 511 to form a clamped and fixed connection relationship, so that the connection between the sealing gasket 7 and the connecting head 51 is more stable and not easy to fall off.

[0037] Preferably, the sealing gasket 7 is made of an elastic material, such as rubber, silicone, etc., and a sealing portion 14 is provided at one end of the first valve port 11 facing the sealing gasket 7. The cross-sectional dimension of the sealing portion 14 gradually decreases along the axial direction of the first valve port, and the end of the sealing portion 14 with a smaller cross-sectional dimension faces the sealing gasket 7, so that when the moving iron core 5 drives the sealing gasket 7 to press against the sealing portion 14, the end of the sealing portion 14 with a smaller cross-sectional dimension can be partially sunken into the sealing gasket 7 to form a V-shaped sealing structure, thereby increasing the sealing area between the sealing gasket 7 and the sealing portion 14, which is beneficial to increasing the sealing effect of the first valve port 11 and preventing leakage.

[0038] During use, when the coil 3 is not energized, the moving iron core 5, under the action of the elastic component 6, presses against the sealed first valve port 11, wherein a sealing gasket 7 is provided between the moving iron core 5 and the first valve port 11, for improving the sealing effect between the moving iron core 5 and the first valve port 11, at this time, the fluid can enter the cavity 12 along the guide hole 41 through the second valve port 42, and flow out from the third valve port 13; when the coil 3 is energized, the moving iron core 5 compresses the elastic component 6 under the action of magnetic force and moves toward the static iron core 4, the seal between the moving iron core 5 and the first valve port 11 is released, the first valve port 11 is opened, the convex ring 83 of the silent pad 8 is tightly sealed against the end face of the moving iron core 5, thereby closing the connecting channel between the second valve port 42 and the cavity 12, at this time, the fluid can enter the cavity 12 through the first valve port 11, and flow out from the third valve port 13.

[0039] Compared with the prior art, the silent battery valve provided by the utility model reduces the impact contact area of ​​the moving iron core and the static iron core during adsorption through the design of the annular end face of the convex ring of the silent pad abutting against the end face of the moving iron core, and can effectively reduce the impact noise generated by the adsorption of the moving iron core and the static iron core. Through the direct contact between the elastic component and the hard fitting surface of the moving iron core, the moving iron core and the static iron core react more quickly during the magnetic adsorption process, and are beneficial to increasing the durability and stability of the solenoid valve.

[0040] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A silent solenoid valve, characterized in that: The invention comprises a frame (1) provided with a cavity (12), a coil (3) being provided on the outer peripheral wall of the frame (1), a moving iron core (5) and a stationary iron core (4) being coaxially provided in the cavity (12), a sound-proof pad (8) being provided on one end of the stationary iron core (4) facing the moving iron core (5), and a convex ring (83) being provided on the sound-proof pad (8) facing the moving iron core (5); when the moving iron core (5) and the stationary iron core (4) are attracted, the convex ring (83) abuts against the end surface of the moving iron core (5) for sealing.

2. The silent solenoid valve according to claim 1, characterized in that: The noise-absorbing pad (8) comprises an annular side wall (81) connected to the static iron core (4); a limiting portion (85) is provided on the inner side of the annular side wall (81); a limiting groove (431) is provided on the static iron core (4) corresponding to the limiting portion (85); and the limiting portion (85) is fixedly engaged with the limiting groove (431).

3. The silent solenoid valve according to claim 2, characterized in that: An air blocking ring (82) is provided on the outer side of the annular side wall (81), and the air blocking ring (82) is in sealing contact with the inner wall of the cavity (12).

4. The silent solenoid valve according to claim 1, characterized in that: A guide hole (41) is provided at one end of the static iron core (4) facing the movable iron core (5), and an elastic component (6) is provided in the guide hole (41). One end of the elastic component (6) abuts against the bottom of the guide hole (41), and the other end abuts against the end surface of the movable iron core (5).

5. The silent solenoid valve according to claim 4, characterized in that: The guide hole (41) is coaxially arranged with the noise-absorbing pad (8), and the diameter of the guide hole (41) is smaller than the diameter of the convex ring (83). The static iron core (4) and the guide hole (41) are coaxially provided with a second valve port (42), and the second valve port (42) is connected with the guide hole (41).

6. The silent solenoid valve according to claim 1, characterized in that: The cavity (12) is radially contracted at one end close to the moving iron core (5) to form a first valve port (11), and the moving iron core (5) is provided with a sealing gasket (7) at one end facing the first valve port (11).

7. The silent solenoid valve according to claim 6, characterized in that: The sealing gasket (7) comprises a top wall (71) and a connecting wall (72) extending vertically along the edge of the top wall (71), and the connecting wall (72) is sleeved on the end of the moving iron core (5).

8. The silent solenoid valve according to claim 7, characterized in that: A stop portion (73) is provided on the inner side of the connecting wall (72), a stop groove (511) is provided on the moving iron core (5) corresponding to the stop portion (73), and the stop portion (73) is fixedly connected to the stop groove (511).

9. The silent solenoid valve according to claim 6, characterized in that: The first valve port (11) is provided with a sealing portion (14) facing the sealing gasket (7); the cross-sectional dimension of the sealing portion (14) gradually decreases along the axial direction of the first valve port (11); and the end of the sealing portion (14) with the smaller cross-sectional dimension faces the sealing gasket (7).

10. The silent solenoid valve according to claim 1, characterized in that: The size of the cross section of the convex ring (83) gradually decreases along the axial direction of the convex ring (83), and the end of the convex ring (83) with a smaller cross section faces the moving iron core (5).

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