Normally-open mute electromagnetic valve

Abstract

The utility model discloses a normally open mute electromagnetic valve, which belongs to the technical field of electromagnetic valves, and comprises a valve body, an end cover, an inlet, an outlet, a movable core component and an electromagnetic component, the inlet and the outlet are arranged on two side walls of the valve body, a fluid channel is arranged between the inlet and the outlet, the movable core component is arranged in the valve body, and the movable core component controls the on-off of the fluid channel. The electromagnetic assembly is arranged below the movable core assembly, the end cover is arranged at the top of the valve body, the movable core assembly comprises a movable rod, an elastic block and a buffer part, the elastic block is arranged on the inner side wall of the end cover, the movable rod is slidably connected into the valve body and controls the fluid channel to be opened and closed, and the buffer part is arranged on the movable rod in a sleeving mode. The elastic block and the buffering piece absorb impact force generated when the movable rod moves up and down to open and close the fluid channel, the service life of the electromagnetic valve is greatly prolonged, and fluid leakage of the electromagnetic valve in the using process is prevented.

Description

Technical Field

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

[0002] The solenoid valve is an actuator in the automatic control system, which is used to control the flow of fluid and change the direction of fluid movement. Under high pressure conditions, the valve body and magnetic isolation tube assembly of the existing solenoid valve repeatedly move the movable rod of the solenoid valve, and the fluid continuously impacts the movable core and the solenoid assembly. The fluid forms a high-pressure water jet cutting at the passing part. After repeated opening and closing, the solenoid valve will gradually wear out, causing leakage and damage to the solenoid valve, reducing the service life of the solenoid valve, and poor stability in long-term use. In addition, the reciprocating impact of the movable rod will also cause magnetic leakage of the solenoid assembly. Now a normally open silent solenoid valve with small impact is needed.

[0003] The existing patent application with publication number CN115031164A discloses a normally open solenoid valve, characterized in that it includes an outer sleeve A, a static iron core A, a moving iron core A, an electromagnetic coil A, a valve core and an upper fixed component; the outer sleeve A includes an outer sleeve A body and its upper end with an external threaded boss and a lower port with an outer peripheral edge, and the outer sleeve A body is made of a non-magnetic metal material; the static iron core A includes the static iron core A body and its central fine through hole, and the lower port of the central fine through hole of the static iron core A body is provided with a lower groove; the moving iron core A is placed on the upper side of the static iron core A body in the outer sleeve A body; the valve core includes a push rod, a sealing column and an external spring, wherein the sealing column is placed in the lower groove of the static iron core A body, and the push rod is placed in the central fine through hole of the static iron core A body; the upper fixed component is used to fix the electromagnetic coil A up and down outside the outer sleeve A body. The sealing performance of the solenoid valve is limited and the impact during the opening and closing process is large, which is not conducive to long-term and frequent use of the solenoid valve. Utility Model Content

[0004] The utility model aims to provide a normally open silent electromagnetic valve, which solves the problem that the existing electromagnetic valve is not resistant to impact and is prone to leakage after long-term use.

[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0006] A normally open silent solenoid valve comprises a valve body, an end cover, an inlet, an outlet, a moving core assembly and an electromagnetic assembly, wherein the inlet and the outlet are arranged on two side walls of the valve body, a fluid channel is arranged between the inlet and the outlet, the moving core assembly is arranged in the valve body, and the moving core assembly controls the on-off of the fluid channel, the electromagnetic assembly is arranged below the moving core assembly, the end cover is arranged on the top of the valve body, the moving core assembly comprises a moving rod, an elastic block and a buffer, the elastic block is arranged on the inner side wall of the end cover, the moving rod is slidably connected to the valve body, and the moving rod controls the on-off of the fluid channel, the buffer is sleeved on the moving rod, the elastic block and the buffer absorb the impact force generated by the up and down movement of the moving rod to open and close the fluid channel, thereby greatly extending the service life of the solenoid valve and preventing fluid leakage of the solenoid valve during use.

[0007] Furthermore, the movable rod includes a rod head, a rod shaft and a connecting portion which are connected in sequence, the diameter of the rod head is larger than that of the rod shaft, the buffer component is buckled on the end surface of the rod head facing the rod shaft, the connecting portion is detachably connected to the electromagnetic component, the flow state of the fluid channel is changed by the action of the movable rod, and the rod head can limit the stop position of the movable rod.

[0008] Furthermore, the buffer includes a concave portion, which is a pit formed by an inward depression of one end surface of the buffer, and the inner wall of the pit is retracted so that the opening spacing of the concave portion is smaller than the inner diameter of the pit, thereby improving the connection strength between the buffer and the moving rod.

[0009] Preferably, the elastic block can abut against the top of the movable rod to form an upper limit of the movable rod, and the buffer can abut against the top wall of the fluid channel to form a lower limit of the movable rod, thereby reducing the impact on the valve body.

[0010] More preferably, the elastic block is a silicone block with good sealing performance.

[0011] Preferably, the moving core assembly further comprises a reset member, one end of which abuts against the end cover, and the other end of which is connected to the moving rod, and the reset member acts on the moving rod to keep the fluid channel in a normally open state.

[0012] Preferably, the electromagnetic assembly includes a moving core, a fixed core and a wire frame, the wire frame is arranged on the valve body, a slideway is provided in the wire frame, the fixed core is arranged at the end of the slideway away from the moving core assembly, the moving core is slidably connected in the slideway, and the moving core is connected to the moving rod, so as to increase the power of the moving rod to move and change the connectivity state of the fluid channel.

[0013] Preferably, the electromagnetic assembly further comprises a magnetic conductive frame, and the magnetic conductive frame is sleeved on the outside of the wire frame to improve the stability of the magnetic force output.

[0014] More preferably, it further comprises a sealing member, wherein the sealing member is arranged between the valve body and the electromagnetic assembly, and the electromagnetic assembly is threadedly connected to the valve body to improve the sealing performance of the valve body.

[0015] More preferably, it further comprises a shell, wherein the shell is connected to the valve body, and the shell surrounds the electromagnetic component to prevent the electromagnetic component from being affected by the external environment.

[0016] The beneficial effects of the utility model are:

[0017] (1) The moving core assembly of the normally open silent solenoid valve is provided with an elastic block and a buffer. The elastic block can prevent the moving rod from directly colliding with the end cover and causing impact on the entire valve body when the moving rod moves upward. The buffer is sleeved on the moving rod to prevent the moving rod from directly hitting the valve body when the moving rod moves downward. The elastic block and the buffer respectively arranged above and on the moving rod can absorb the impact of the on-off action of the moving rod, and the opening and closing action of the fluid channel is realized by the up and down movement of the buffer, thereby preventing fluid leakage.

[0018] (2) The electromagnetic components on the normally open silent solenoid valve include a moving core, a fixed core and a wire frame. A magnetic conductive frame is provided on the outside of the wire frame to increase the magnetic force of the wire-added phase coil and prevent the magnetic force from decaying due to impact. The moving core is connected to the moving rod, and the moving core is slidably connected to the slideway of the wire frame, which can play a guiding role. The fluid channel opening and closing action is performed by the up and down movement of the buffer, thereby ensuring the stability of the movement of the moving core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An axonometric diagram of a normally open silent solenoid valve provided by the utility model;

[0020] Figure 2 A front view of a normally open silent solenoid valve provided by the utility model;

[0021] Figure 3 for Figure 2 Section view along line AA;

[0022] Figure 4 This is a partial structural cross-sectional view of the normally open silent solenoid valve provided by the utility model.

[0023] Reference numerals:

[0024] 1. Valve body; 11. Inner valve port; 2. End cover; 21. Sealing ring; 3. Inlet; 4. Moving core assembly; 41. Reset member; 42. Elastic block; 43. Moving rod; 431. Rod head; 432. Rod body; 433. Connecting part; 44. Buffer member; 441. Concave part; 5. Outlet; 6. Electromagnetic assembly; 61. Moving core; 62. Fixed core; 63. Slideway; 64. Magnetic frame; 65. Wire frame; 7. Shell; 71. Hanging ear; 8. Sealing member. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-Figure 4 As shown, this embodiment discloses a normally open silent solenoid valve, including a valve body 1, an end cover 2, an inlet 3, an outlet 5, a moving core assembly 4 and an electromagnetic assembly 6. The inlet 3 and the outlet 5 are arranged on the two side walls of the valve body 1. A fluid channel penetrating the valve body 1 is arranged between the inlet 3 and the outlet 5 for fluid to pass through. The moving core assembly 4 is arranged in the valve body 1, and the moving core assembly 4 controls the on-off of the fluid channel. The electromagnetic assembly 6 is arranged below the moving core assembly 4 to provide power for the moving core assembly 4 to move up and down. The end cover 2 is arranged on the top of the valve body 1. The moving core assembly 4 It includes a moving rod 43, an elastic block 42 and a buffer 44. The elastic block 42 is arranged on the inner wall of the end cover 2. When the moving rod 43 moves upward to the top, it contacts the elastic block 42 to play a role of buffering and limiting, and prevents the moving rod 43 from directly colliding with the valve body 1 to generate vibration. The moving rod 43 is slidably connected in the valve body 1, and the moving rod 43 controls the on-and-off of the fluid channel. The buffer 44 is sleeved on the moving rod 43, and is used for sealing and buffering the moving rod 43, controlling the on-and-off of the fluid channel and preventing fluid leakage, and can also absorb the direct impact of the moving rod 43 on the valve body 1 when it moves downward.

[0027] Preferably, the fluid channel is disposed in the valve body 1 , one side of which is connected to the inlet 3 , and the fluid channel extends upward from the middle of the valve body 1 , passes through the inner valve port 11 formed by the buffer member 44 and the inner valve wall, and then is connected to the outlet 5 .

[0028] A sealing ring 21 is provided between the end cover 2 and the valve body 1 to prevent leakage of gas and internal liquid.

[0029] Furthermore, the movable rod 43 includes a rod head 431, a rod body 432 and a connecting portion 433 which are connected in sequence. The diameter of the rod head 431 is larger than that of the rod body 432. The buffer 44 is buckled on the end face of the rod head 431 facing the rod body 432. The connecting portion 433 is detachably connected to the electromagnetic component 6. The rod body 432 plays a guiding role. The solenoid valve is in an open state. After the connecting portion 433 is connected to the electromagnetic component 6, the fluid channel can be closed. The electromagnetic component 6 outputs magnetic force to control the up and down movement of the movable rod 43. The buffer 44 rises and falls to complete the opening and closing of the fluid channel. The rod head 431 can close the inner valve port 11 on the fluid channel when descending.

[0030] Furthermore, the buffer 44 includes a concave portion 441, which is a pit formed by an inward depression on one end surface of the buffer 44. The inner wall of the pit is retracted so that the opening spacing of the concave portion 441 is smaller than the inner diameter of the pit. A boss is provided on the lower end surface of the rod head 431, and the boss cooperates with the concave portion 441 to form a snap connection to prevent the buffer 44 from falling off during long-term operation. The buffer 44 seals the gap between the rod head 431 and the inner valve port 11 on the side wall of the fluid channel to prevent leakage. The buffer 44 is made of silicone.

[0031] Preferably, the elastic block 42 can abut against the top of the movable rod 43 to form an upper limit of the movable rod 43, and the buffer 44 can abut against the top wall of the fluid channel to form a lower limit of the movable rod 43. The movable rod 43 is buffered in both the upper and lower directions to increase the life of the repeated movements of the movable rod 43 and prevent the components in the valve body 1 from loosening and failing.

[0032] The elastic block 42 is made of silicone.

[0033] Preferably, the moving core assembly 4 further includes a reset member 41, one end of which contacts the end cover 2, and the other end is connected to the moving rod 43. The reset member 41 is a spring for providing a downward reset force to the moving rod 43 to keep the fluid channel in a normally open state.

[0034] Preferably, the electromagnetic assembly 6 includes a moving core 61, a fixed core 62 and a wire frame 65. The wire frame 65 is arranged on the valve body 1. A slideway 63 is provided in the wire frame 65. The fixed core 62 is arranged at the end of the slideway 63 away from the moving core assembly 4. The moving core 61 is slidably connected in the slideway 63, and the moving core 61 is connected to the moving rod 43. An electromagnetic coil is wound on the wire frame 65. The up and down movement of the moving rod 43 is controlled by controlling the power supply of the electromagnetic coil. The fixed core 62 is fixed to the part of the slideway 63 away from the moving rod 43 to block the moving core 61.

[0035] More preferably, the electromagnetic assembly 6 also includes a magnetic frame 64, which is sleeved on the outside of the wire frame 65. The magnetic frame 64 is stamped from a metal sheet and serves to connect the magnetic lines of force of the electromagnetic coil to ensure that the magnetic force can be output stably and is not easily affected by the external environment.

[0036] Preferably, a sealing member 8 is further included. The sealing member 8 is disposed between the valve body 1 and the electromagnetic assembly 6. The electromagnetic assembly 6 is threadedly connected to the valve body 1. The sealing member 8 fills the gap between the moving rod 43 and the fluid channel to prevent leakage.

[0037] More preferably, it also includes a shell 7, which is connected to the valve body 1. The shell 7 surrounds the electromagnetic assembly 6. The magnetic frame 64 is attached to the inner wall of the shell 7 to improve the pressure resistance of the shell 7 and protect the electromagnetic assembly 6. The two side walls of the shell 7 are provided with hanging ears 71, which are used to install the solenoid valve.

[0038] The working process of the normally open silent solenoid valve is as follows:

[0039] The solenoid valve is in a normally open state when it is stationary. Under the action of the reset member 41, the rod body 432 of the movable rod 43 is partially in the fluid channel. The fluid enters along the inlet 3 and passes through the fluid channel and then flows out from the outlet 5. At this time, the buffer member 44 closes the inner valve port 11. When the fluid flow state needs to be changed, the electromagnetic component 6 is charged, and the movable core 61 moves upward under the action of the magnetic force, driving the movable rod 43 to move upward, and the buffer member 44 moves upward to open the inner valve port 11. The rod head 431 of the movable rod 43 hits the elastic block 42 to stop. At this time, the fluid channel is blocked and enters a closed state.

[0040] According to the disclosure and teaching of the above description, the technical personnel in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes of the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A normally open silent solenoid valve, comprising a valve body (1), an end cover (2), an inlet (3), an outlet (5), a moving core assembly (4) and an electromagnetic assembly (6), wherein the inlet (3) and the outlet (5) are arranged on two side walls of the valve body (1), a fluid channel is arranged between the inlet (3) and the outlet (5), the moving core assembly (4) is arranged in the valve body (1), and the moving core assembly (4) controls the on-off of the fluid channel, the electromagnetic assembly (6) is arranged below the moving core assembly (4), and the end cover (2) is arranged on the top of the valve body (1), characterized in that: The moving core assembly (4) comprises a moving rod (43), an elastic block (42) and a buffer component (44); the elastic block (42) is arranged on the inner wall of the end cover (2); the moving rod (43) is slidably connected in the valve body (1), and the moving rod (43) controls the on-off of the fluid channel; the buffer component (44) is sleeved on the moving rod (43).

2. The normally open silent solenoid valve according to claim 1, characterized in that: The movable rod (43) comprises a rod head (431), a rod shaft (432) and a connecting portion (433) which are connected in sequence; the diameter of the rod head (431) is larger than that of the rod shaft (432); the buffer member (44) is buckled on the end surface of the rod head (431) facing the rod shaft (432); and the connecting portion (433) is detachably connected to the electromagnetic assembly (6).

3. The normally open silent solenoid valve according to claim 2, characterized in that: The buffer (44) comprises a concave portion (441), wherein the concave portion (441) is a pit formed by an inward depression of one end surface of the buffer (44), and the inner wall of the pit is contracted so that the opening spacing of the concave portion (441) is smaller than the inner diameter of the pit.

4. The normally open silent solenoid valve according to claim 3, characterized in that: The elastic block (42) can abut against the top of the movable rod (43) to form an upper limit position of the movable rod (43), and the buffer component (44) can abut against the top wall of the fluid channel to form a lower limit position of the movable rod (43).

5. The normally open silent solenoid valve according to claim 4, characterized in that: The elastic block (42) is a silica gel block.

6. The normally open silent solenoid valve according to claim 4, characterized in that: The moving core assembly (4) further comprises a reset member (41), one end of which abuts against the end cover (2), and the other end of which is connected to the moving rod (43).

7. The normally open silent solenoid valve according to any one of claims 1 to 6, characterized in that: The electromagnetic assembly (6) comprises a moving core (61), a fixed core (62) and a wire frame (65); the wire frame (65) is arranged on the valve body (1); a slideway (63) is arranged in the wire frame (65); the fixed core (62) is arranged at the end of the slideway (63) away from the moving core assembly (4); the moving core (61) is slidably connected in the slideway (63), and the moving core (61) is connected to the moving rod (43).

8. The normally open silent solenoid valve according to claim 7, characterized in that: The electromagnetic assembly (6) further comprises a magnetic conductive frame (64), wherein the magnetic conductive frame (64) is sleeved on the outside of the wire frame (65).

9. The normally open silent solenoid valve according to claim 1, characterized in that: It also comprises a sealing member (8), wherein the sealing member (8) is arranged between the valve body (1) and the electromagnetic assembly (6), and the electromagnetic assembly (6) is threadedly connected to the valve body (1).

10. The normally open silent solenoid valve according to claim 1, characterized in that: It also comprises a shell (7), wherein the shell (7) is connected to the valve body (1), and the shell (7) surrounds the electromagnetic assembly (6).

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