CN213575832U

CN213575832U - Miniature electromagnetic valve

Info

Publication number: CN213575832U
Application number: CN202022111910.0U
Authority: CN
Inventors: 胡华
Original assignee: Tengzhuo Intelligent Technology Huzhou Co ltd
Current assignee: Tengzhuo Intelligent Technology Huzhou Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-06-29
Anticipated expiration: 2030-09-23

Abstract

The utility model discloses a micro electromagnetic valve, which comprises a valve body, wherein a coil body is arranged on one side of the valve body; two threaded holes are arranged on one side of the coil body and one side of the valve body in a penetrating mode, the two threaded holes are distributed on the diagonal line of the coil body along the threaded holes, each threaded hole is connected with a bolt in a threaded mode, one end of each bolt stretches into the threaded hole in the valve body to ensure that the valve body and the coil body are firmly connected, and a second O-shaped sealing ring is arranged between the valve body and the coil body. The utility model has the advantages of it is following and effect: the electromagnetic valve can improve the connection between the valve body and the coil body and the sealing performance between the valve body and the coil body, thereby ensuring the use of the product to be more reliable.

Description

Miniature electromagnetic valve

Technical Field

The utility model relates to a solenoid valve, in particular to miniature solenoid valve.

Background

The electromagnetic valve is an industrial device controlled by electromagnetism, is used for controlling an automatic basic element of gas, belongs to an actuator, and is not limited to hydraulic pressure and pneumatic pressure. Used in industrial control systems to regulate the direction, flow, velocity and other parameters of a medium. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. There are many types of solenoid valves, with different solenoid valves functioning at different locations in the control system, the most common being one-way valves, safety valves, directional control valves, and speed control valves.

The micro electromagnetic valve is one of electromagnetic valves, has a small volume, is a key execution element in an widely used automation control technology, and is used for controlling and adjusting the direction, flow rate, speed and other parameters of a medium. The micro electromagnetic valve generally comprises a valve body and a coil body, and how the valve body and the coil body are connected becomes a key. The valve body and the coil body of the solenoid valve in the existing market are connected through a buckle, for example, the chinese patent with publication number CN 207145734U. The buckle is a non-standard product and needs to be produced by a mold, and the buckle is not firmly connected, so that the sealing performance between the valve body and the coil body is influenced, and even the phenomenon of falling off can occur, so that the improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a miniature solenoid valve, this kind of solenoid valve can improve the hookup between valve body and the coil body, still can improve the sealing performance between the two to guarantee that the use of product is more reliable.

The above technical purpose of the present invention can be achieved by the following technical solutions: a micro electromagnetic valve comprises a valve body, wherein a coil body is arranged on one side of the valve body; two threaded holes are arranged on one side of the coil body and one side of the valve body in a penetrating mode, the two threaded holes are distributed on the diagonal line of the coil body along the threaded holes, each threaded hole is connected with a bolt in a threaded mode, one end of each bolt stretches into the threaded hole in the valve body to ensure that the valve body and the coil body are firmly connected, and a second O-shaped sealing ring is arranged between the valve body and the coil body.

The utility model discloses a further set up to: the valve body comprises a shell and a connecting rod positioned in the shell, wherein the shell is provided with an air inlet, an air outlet and an air guide port, an air guide gap is arranged between the connecting rod and the shell, the connecting rod is provided with a left channel and a right channel, the air inlet can be communicated with the air guide port sequentially through the right channel and the air guide gap to form an air inlet channel, and the air outlet can be communicated with the air guide port sequentially through the left channel and the air guide gap to form an air outlet channel;

the coil body can realize cutting off or conducting the air inlet channel, one side of the shell is provided with a rear cover sealing piece which can cut off or conduct the air outlet channel, and when the coil body cuts off the air inlet channel, the rear cover sealing piece can be controlled by one end of the coil body to conduct the air outlet channel.

The utility model discloses a further set up to: the rear cover sealing element comprises a back-off end cover positioned at one end of the shell and a piston sealing plug used for plugging the left channel, a sealing spring is arranged between the back-off end cover and the piston sealing plug, two ends of the sealing spring are respectively abutted against the back-off end cover and the piston sealing plug, the coil body can apply external force to the piston sealing plug so as to enable the piston sealing plug to move towards the direction far away from the left channel, and at the moment, the sealing spring is in a compressed state and the air outlet channel is communicated;

the one end that the back-off end cover kept away from the piston sealing plug is provided with the breach, the one end of shell is provided with can with this breach matched with stopper.

The utility model discloses a further set up to: a first O-shaped sealing ring is arranged between the inverted end cover and the shell.

The utility model discloses a further set up to: the coil body comprises a bobbin, a coil is sleeved outside the bobbin, a movable iron core and a static iron core are arranged inside the bobbin, a return spring is sleeved outside the movable iron core, a step against which the return spring can abut is arranged on one side of the bobbin, and one end, away from the step, of the return spring abuts against the movable iron core;

the end part of the movable iron core, which is close to the valve body, is provided with a counter bore, an interference fit ring gasket and a rubber plug are arranged in the counter bore, one end of the rubber plug is attached to the movable iron core, the other end face of the rubber plug is used for sealing a right channel, one side of the ring gasket is provided with a driving piece, and one end of the driving piece is abutted to the piston sealing plug;

when the coil is electrified, the movable iron core and the static iron core are attracted, the reset spring is compressed, the rubber plug moves towards the direction of the static iron core along with the movable iron core, the air inlet channel is conducted, and the air outlet channel is cut off;

when the coil is powered off, the movable iron core moves towards the right channel under the action of the return spring until the rubber plug blocks the right channel, at the moment, the driving piece acts on the piston sealing plug to enable the piston sealing plug to move towards the direction far away from the left channel, the sealing spring is in a compressed state, and the air outlet channel is communicated.

The utility model discloses a further set up to: and a power plug and a switch button are arranged above the coil body, and the power plug, the switch button and the coil form a complete control circuit.

The utility model discloses a further set up to: a protective shell is sleeved outside the coil.

The utility model discloses a further set up to: and a coil sealing ring is arranged between the static iron core and the winding drum.

To sum up, the utility model discloses following beneficial effect has: the application gives up the current buckle structure, and directly adopts the mode of bolt-up. In addition, the specific position of the fastening connection is defined as the diagonal line of the coil body, so that the valve body and the coil body are firmly connected. In conclusion, the electromagnetic valve can improve the connection between the valve body and the coil body and the sealing performance between the valve body and the coil body, so that the use of the product is more reliable.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is a schematic view of the structure of FIG. 1 in another orientation;

FIG. 3 is a schematic view of the structure of FIG. 2 in another orientation;

FIG. 4 is a cross-sectional view of the structure of FIG. 1;

fig. 5 is a partial structural sectional view in another direction of fig. 1.

Reference numerals: 1. an air inlet; 2. an exhaust port; 3. an air guide port; 4. a valve body; 5. a coil body; 6. a bolt; 7. a second O-ring seal; 8. a housing; 9. a connecting rod; 10. an air guiding gap; 11. a left channel; 12. a right channel; 13. a rear cover seal; 14. reversing the end cover; 15. a piston sealing plug; 16. a seal spring; 17. a notch; 18. a limiting block; 19. a first O-ring seal; 20. a bobbin; 21. a coil; 22. a movable iron core; 23. a stationary iron core; 24. a return spring; 25. a step; 26. a counter bore; 27. a ring pad; 28. a rubber plug; 29. a drive member; 30. a power supply plug; 31. a switch button; 32. a protective shell; 33. and a coil sealing ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, a micro solenoid valve includes a valve body 4 having an inlet port 1, an outlet port 2, and an inlet port 3, a coil body 5 being provided at one side of the valve body 4; two threaded holes (not marked in the drawing) are arranged on one sides of the coil body 5 and the valve body 4 in a penetrating mode, the two threaded holes are distributed along the diagonal line of the coil body 5, each threaded hole is connected with a bolt 6 in a threaded mode, one end of each bolt 6 extends into the threaded hole in the valve body 4 to ensure that the valve body 4 and the coil body 5 are firmly connected, and a second O-shaped sealing ring 7 is arranged between the valve body 4 and the coil body 5 to ensure the sealing effect of the interface of the valve body 4 and the coil body 5.

The application abandons the existing buckle structure, and directly adopts the mode of bolt 6 fastening. In addition, the present application also defines the specific location of the fastening connection as the diagonal line of the coil body 5, thereby ensuring the valve body 4 and the coil body 5 to be firmly connected. In conclusion, the electromagnetic valve can improve the connection between the valve body 4 and the coil body 5 and the sealing performance between the valve body and the coil body, thereby ensuring the use of the product to be more reliable.

Further, the valve body 4 comprises a housing 8 and a connecting rod 9 located in the housing 8, and the air inlet 1, the air outlet 2 and the air guide port 3 are all arranged on the housing 8. An air guide gap 10 is arranged between the connecting rod 9 and the shell 8, a left channel 11 and a right channel 12 are arranged on the connecting rod 9, the air inlet 1 can be communicated with the air guide port 3 through the right channel 12 and the air guide gap 10 in sequence to form an air inlet channel, and the air outlet 2 can be communicated with the air guide port 3 through the left channel 11 and the air guide gap 10 in sequence to form an air outlet channel.

The coil body 5 can realize the cutting off or the conduction of the air inlet channel, and one side of the shell 8 is provided with a rear cover sealing piece 13 which can cut off or conduct the air outlet channel. When the coil body 5 is cut off from the air inlet channel, one end of the coil body 5 can control the rear cover sealing piece 13 to be conducted to the air outlet channel.

The electromagnetic valve can realize the control of the flow and the flow speed of gas. When the air inlet channel is conducted and the air outlet channel is closed, external air can enter another device through the air inlet channel and the air guide port 3.

When the air inlet channel needs to be closed, the air inlet channel is cut off by the coil body 5, and the rear cover sealing piece 13 is controlled by the coil body 5 to be communicated with the air outlet channel, so that residual air in the equipment is discharged outwards from the air outlet channel (specifically discharged from the air guide port 3 to the air outlet 2), and the pressure relief operation of the equipment is completed. Specifically, the opening and closing of the air inlet channel or the air outlet channel can be realized through the coil body 5.

Further, the rear cover sealing element 13 includes a back-off end cover 14 located at one end of the housing 8 and a piston sealing plug 15 for blocking the left channel 11, a sealing spring 16 is disposed between the back-off end cover 14 and the piston sealing plug 15, and two ends of the sealing spring 16 are respectively abutted to the back-off end cover 14 and the piston sealing plug 15. The coil body 5 can apply an external force to the piston sealing plug 15 to move the piston sealing plug 15 away from the left channel 11, and the sealing spring 16 is in a compressed state and the air outlet channel is conducted.

A gap 17 is arranged at one end of the inverted end cover 14 far away from the piston sealing plug 15, and a limiting block 18 which can be matched with the gap 17 is arranged at one end of the shell 8. The position of the inverted end cap 14 can be limited by the stopper 18 to prevent it from being separated from the outside of the housing 8.

When the air outlet channel is used specifically, the position of the inverted end cover 14 is limited and fixed, so that the sealing spring 16 can always press against the piston sealing plug 15 and provide the piston sealing plug 15 with pre-tightening force for plugging the left channel 11, and the air outlet channel is cut off. When the coil body 5 can apply an external force to the piston sealing plug 15 to move the piston sealing plug 15 away from the left channel 11, the sealing spring 16 is in a compressed state and the air outlet channel is conducted.

Further, a first O-ring 19 is disposed between the inverted end cap 14 and the housing 8, and the first O-ring 19 can seal between the inverted end cap 14 and the housing 8.

Further, the coil body 5 includes a bobbin 20, and a coil 21 is sleeved outside the bobbin 20. The movable iron core 22 and the static iron core 23 are arranged inside the bobbin 20, the reset spring 24 is sleeved outside the movable iron core 22, a step 25 for the reset spring 24 to abut against is arranged on one side of the bobbin 20, and one end, far away from the step 25, of the reset spring 24 abuts against the movable iron core 22.

The end part of the movable iron core 22 close to the valve body 4 is provided with a counter bore 26, the counter bore 26 is internally provided with a ring gasket 27 and a rubber plug 28 which are in interference fit, one end of the rubber plug 28 is attached to the movable iron core 22, and the other end surface is a sealing surface which is used for sealing the right channel 12. One side of the ring 27 is provided with a driver 29, one end of which driver 29 abuts the piston sealing plug 15.

When the coil 21 is energized, the movable iron core 22 is attracted to the stationary iron core 23, and the return spring 24 is compressed. The rubber stopper 28 moves with the plunger 22 toward the stationary core 23, and the air inlet passage is opened and the air outlet passage is closed.

When the coil 21 is de-energized, the plunger 22 moves toward the right channel 12 under the action of the return spring 24 until the rubber stopper 28 blocks the right channel 12. At this time, the driving member 29 acts on the piston sealing plug 15 to move the piston sealing plug 15 away from the left channel 11, the sealing spring 16 is in a compressed state, and the air outlet channel is communicated.

Further, the driving member 29 is located between the link 9 and the housing 8.

Furthermore, a power plug 30 and a switch button 31 are arranged above the coil body 5, and the power plug 30, the switch button 31 and the coil 21 form a complete control circuit for controlling the suction action of the movable iron core 22 to achieve the purpose of controlling the on-off of one of the air inlet channel and the air outlet channel.

Further, a PLC circuit board (not shown) is included, and the PLC circuit board is electrically connected to the power plug 30 and the coil 21, respectively. This is the prior art and will not be described in detail herein.

Further, a protective case 32 is sleeved outside the coil 21 to protect the internal structure of the coil body 5.

Further, a coil packing 33 is provided between the stationary core 23 and the bobbin 20. The joint of the stationary core 23 and the bobbin 20 is sealed by the coil packing 33.

The specific embodiments are only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. A miniature solenoid valve which characterized in that: the valve comprises a valve body (4), wherein a coil body (5) is arranged on one side of the valve body (4); two screw holes are all worn to be equipped with, two in one side of coil body (5) and valve body (4) the diagonal distribution of coil body (5) along the screw hole, every the equal threaded connection of screw hole has bolt (6), the one end of bolt (6) stretches into the threaded hole that is located valve body (4) in order to ensure that valve body (4) and coil body (5) firmly connect, be provided with second O shape sealing washer (7) between valve body (4) and coil body (5).

2. A micro-solenoid valve according to claim 1, wherein: the valve body (4) comprises a shell (8) and a connecting rod (9) positioned in the shell (8), wherein the shell (8) is provided with an air inlet (1), an air outlet (2) and an air guide opening (3), an air guide gap (10) is arranged between the connecting rod (9) and the shell (8), the connecting rod (9) is provided with a left channel (11) and a right channel (12), the air inlet (1) can be communicated with the air guide opening (3) through the right channel (12) and the air guide gap (10) in sequence to form an air inlet channel, and the air outlet (2) can be communicated with the air guide opening (3) through the left channel (11) and the air guide gap (10) in sequence to form an air outlet channel;

the coil body (5) can realize cutting off or conducting the air inlet channel, one side of the shell (8) is provided with a rear cover sealing piece (13) capable of cutting off or conducting the air outlet channel, and when the coil body (5) cuts off the air inlet channel, one end of the coil body (5) can control the rear cover sealing piece (13) to conduct the air outlet channel.

3. A micro-solenoid valve according to claim 2, wherein: the rear cover sealing element (13) comprises a reverse buckle end cover (14) positioned at one end of the shell (8) and a piston sealing plug (15) used for plugging the left channel (11), a sealing spring (16) is arranged between the reverse buckle end cover (14) and the piston sealing plug (15), two ends of the sealing spring (16) are respectively abutted to the reverse buckle end cover (14) and the piston sealing plug (15), the coil body (5) can apply external force to the piston sealing plug (15) so that the piston sealing plug (15) moves towards the direction far away from the left channel (11), and at the moment, the sealing spring (16) is in a compressed state and the air outlet channel is communicated;

one end of the inverted end cover (14) far away from the piston sealing plug (15) is provided with a notch (17), and one end of the shell (8) is provided with a limiting block (18) which can be matched with the notch (17).

4. A micro-solenoid valve according to claim 3, wherein: a first O-shaped sealing ring (19) is arranged between the inverted end cover (14) and the shell (8).

5. The micro electromagnetic valve according to claim 4, wherein: the coil body (5) comprises a bobbin (20), a coil (21) is sleeved outside the bobbin (20), a movable iron core (22) and a static iron core (23) are arranged inside the bobbin (20), a return spring (24) is sleeved outside the movable iron core (22), a step (25) for the return spring (24) to abut against is arranged on one side of the bobbin (20), and one end, far away from the step (25), of the return spring (24) abuts against the movable iron core (22);

a counter bore (26) is formed in the end portion, close to the valve body (4), of the movable iron core (22), a ring gasket (27) and a rubber plug (28) which are in interference fit are arranged in the counter bore (26), one end of the rubber plug (28) is attached to the movable iron core (22), the other end face of the rubber plug is used for sealing the right channel (12), a driving piece (29) is arranged on one side of the ring gasket (27), and one end of the driving piece (29) is abutted to the piston sealing plug (15);

when the coil (21) is electrified, the movable iron core (22) and the static iron core (23) are attracted, the return spring (24) is compressed, the rubber plug (28) moves towards the direction of the static iron core (23) along with the movable iron core (22), the air inlet channel is conducted at the moment, and the air outlet channel is cut off;

when the coil (21) is powered off, the movable iron core (22) moves towards the right channel (12) under the action of the return spring (24) until the rubber plug (28) blocks the right channel (12), at the moment, the driving piece (29) acts on the piston sealing plug (15) to enable the piston sealing plug (15) to move towards the direction far away from the left channel (11), the sealing spring (16) is in a compressed state, and the air outlet channel is communicated.

6. A micro-solenoid valve according to claim 5, wherein: a power supply plug (30) and a switch button (31) are arranged above the coil body (5), and the power supply plug (30), the switch button (31) and the coil (21) form a complete control circuit.

7. The micro electromagnetic valve according to claim 6, wherein: a protective shell (32) is sleeved outside the coil (21).

8. A micro-solenoid valve according to claim 7, wherein: and a coil sealing ring (33) is arranged between the static iron core (23) and the bobbin (20).