Flow-adjustable two-position three-way electromagnetic valve

Abstract

The flow-adjustable two-position three-way electromagnetic valve comprises a valve body and a coil assembly, the coil assembly comprises a shell, a static iron core, a movable iron core and a driving spring, the shell is installed on the valve body, the static iron core is inserted into the shell, the movable iron core slides in the shell, and the driving spring is arranged on the shell. The driving spring drives the movable iron core to be away from the static iron core, a nut is arranged in the upper end of the shell, a screw rod is arranged at the upper end of the static iron core, the screw rod is arranged in the nut in a threaded fit mode, a limiting piece is arranged on the peripheral side wall of the nut, and the nut can be rotationally connected into the upper end of the shell through the limiting piece. The application has the effect of improving the adaptability of the two-position three-way electromagnetic valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic valves, in particular to a two-position three-way electromagnetic valve with adjustable flow. BACKGROUND

[0002] The two-position three-way electromagnetic valve comprises a valve body and a coil assembly, the coil assembly is installed on the valve body, the coil assembly comprises an outer shell, a static iron core, a dynamic iron core, a coil, a driving spring and a sealing element, the coil is fixed in the outer shell, the static iron core is installed in the coil, the dynamic iron core slides in the lower end of the outer shell, the driving spring drives the dynamic iron core to move downward, so that the dynamic iron core and the static iron core are away from each other, and the sealing element is fixed to the lower end of the dynamic iron core; since the static iron core is fixed and the moving distance of the dynamic iron core remains unchanged, the flow amount of the valve port in the valve body remains unchanged, so that the application range of the two-position three-way electromagnetic valve is small. CONTENT

[0003] The present application relates to the technical field of electromagnetic valves, in particular to a two-position three-way electromagnetic valve with adjustable flow.

[0004] To achieve the above object, the present application adopts the following technical scheme:

[0005] The two-position three-way electromagnetic valve comprises a valve body and a coil assembly, the coil assembly comprises an outer shell, a static iron core, a dynamic iron core and a driving spring, the outer shell is installed on the valve body, the static iron core is inserted into the outer shell, the dynamic iron core slides in the outer shell, the driving spring drives the dynamic iron core to move away from the static iron core, a screw cap is arranged in the upper end of the outer shell, a screw rod is arranged at the upper end of the static iron core, the screw rod is threadedly connected to the screw cap, a limiting element is arranged on the circumferential wall of the screw cap, and the limiting element allows the screw cap to be rotatably connected to the upper end of the outer shell.

[0006] Preferably, the limiting element comprises a plug rod and a limiting ball, the upper end of the outer shell is provided with a placing groove, the lower end of the screw cap is located in the placing groove, the upper end of the screw cap is provided with an insertion groove, a limiting groove is formed in the side wall of the insertion groove, the limiting ball is located in the limiting groove, one side of the limiting ball protrudes outward from the screw cap, the plug rod is inserted into the insertion groove, the plug rod limits the limiting ball in the limiting groove, and the inner circumferential wall of the placing groove is circumferentially provided with a ring groove for sliding of the limiting ball.

[0007] Preferably, one side of the lower end of the plug rod is provided with a guide arc.

[0008] Preferably, the limiting groove is inclined upward from inside to outside.

[0009] Preferably, a sealing ring is arranged on the circumferential wall of the static iron core.

[0010] Preferably, the nut is sleeved with a sheath.

[0011] Preferably, the lower end of the sheath is circumferentially uniformly provided with a plurality of fixing rods, and the upper end of the shell is provided with fixing holes for inserting and fixing the fixing rods.

[0012] To sum up, the application has at least one of the following beneficial technical effects:

[0013] 1. When the flow rate of the two-position three-way electromagnetic valve needs to be adjusted, the nut can be rotated, and the screw rod can be moved outward or inward under the cooperation of the threads of the nut and the screw rod, thereby driving the static core to move, so that the distance between the static core and the dynamic core changes, and then the electromagnetic valve is powered on, and then the static core attracts the dynamic core, so that the lower end of the dynamic core is away from the valve port of the valve body, and the distance between the dynamic core and the valve port of the valve body changes, thereby changing the flow rate of the valve port in the valve body and improving the adaptability of the two-position three-way electromagnetic valve.

[0014] 2. When the nut is installed, the lower end of the nut is inserted into the placement groove, then the limiting ball is slid into the insertion slot until the limiting ball slides to the bottom of the insertion slot, then one end of the insertion rod is inserted into the insertion slot, and then under the action of the guide circular arc, the limiting ball can be pushed into the limiting groove, then the insertion rod is rotated, so that the vertical surface of the insertion rod abuts against the limiting ball, thereby clamping the limiting ball into the ring groove, and then the nut can rotate in the placement groove, thereby improving the convenience of installing the nut. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a sectional view of the two-position three-way electromagnetic valve of the utility model;

[0016] Figure 2 is Figure 1 an enlarged view of A in figure.

[0017] In the figure: 1, valve body; 2, coil assembly; 3, shell; 4, static core; 5, dynamic core; 6, driving spring; 7, sealing head; 8, mounting hole; 9, air inlet; 10, working port; 11, air outlet; 12, valve port; 13, placement groove; 14, nut; 15, limiting piece; 16, insertion rod; 17, limiting ball; 18, insertion slot; 19, limiting groove; 20, ring groove; 21, guide circular arc; 22, sealing ring; 23, sheath; 24, fixing rod; 25, fixing hole; 26, screw rod. DETAILED DESCRIPTION

[0018] The utility model will be further described below in combination with the drawings.

[0019] The embodiment of the application discloses a two-position three-way electromagnetic valve with adjustable flow rate.

[0020] Referring to Figure 1 and Figure 2 , including the valve body 1 and coil assembly 2, coil assembly 2 including the shell 3, static core 4, dynamic core 5, drive spring 6 and sealing head 7, shell 3 is fixed by bolt on the upper end surface of valve body 1, shell 3 has mounting hole 8, mounting hole 8 is inverted ladder, static core 4 is inserted in the upper part of mounting hole 8, dynamic core 5 is inserted in the lower part of mounting hole 8, static core 4 has air inlet 9, both ends of valve body 1 has working port 10 and exhaust port 11 respectively, valve body 1 has valve port 12, sealing head 7 is fixed on the lower end of dynamic core 5, sealing head 7 and valve port 12 corresponding to each other, drive spring 6 is sleeved on the lower end of dynamic core 5, one end of drive spring 6 is abutted on the side wall of the lower end of dynamic core 5, the other end of drive spring 6 is abutted on the inner side wall of valve body 1.

[0021] The upper end of shell 3 is provided with a placing groove 13, a nut 14 is inserted in the placing groove 13, the nut 14 is circular column, the upper end of static core 4 is integrally provided with a screw rod 26, the circumferential side of screw rod 26 is threadedly connected to the inner circumferential side of nut 14, the circumferential side of nut 14 is uniformly provided with four limiting members 15, the limiting member 15 includes a plug rod 16 and a limiting ball 17, the upper end of nut 14 is uniformly provided with four insertion grooves 18, the side wall of insertion groove 18 is provided with a limiting groove 19, the limiting groove 19 is communicated with the outer circumferential side of nut 14 and insertion groove 18, the limiting groove 19 is inclined upward from inside to outside, the inner circumferential side of placing groove 13 is circumferentially provided with a ring groove 20, part of limiting ball 17 is located in ring groove 20, the other part is located in limiting groove 19, plug rod 16 is inserted in insertion groove 18, the side wall of limiting ball 17 is abutted on the side wall of plug rod 16. Drive nut 14 to rotate, under the cooperation of nut 14 and screw rod 26, the screw rod 26 can be moved outward or inward, thereby driving static core 4 to move, so that the distance between static core 4 and dynamic core 5 changes, then the electromagnetic valve is powered on, then static core 4 will attract dynamic core 5, so that the lower end of dynamic core 5 is away from valve port 12 of valve body 1, because the distance between static core 4 and dynamic core 5 changes, the distance between dynamic core 5 and valve port 12 of valve body 1 changes, thereby the flow amount of valve port 12 in valve body 1 can be changed.

[0022] The lower end of plug rod 16 is provided with a guide arc 21 on one side, the other side of the lower end of plug rod 16 is a vertical side wall, the limiting ball 17 is slid from the insertion groove 18 until the limiting ball 17 slides to the bottom of insertion groove 18, then one end of plug rod 16 is inserted into insertion groove 18, then under the action of guide arc 21, the limiting ball 17 can be pushed into limiting groove 19, then plug rod 16 is rotated, so that the vertical surface of plug rod 16 is abutted on limiting ball 17, thereby the limiting ball 17 is clamped into ring groove 20, then nut 14 can rotate in placing groove 13.

[0023] The static iron core 4 is sleeved with a sealing ring 22, and the outer periphery of the sealing ring 22 abuts against the periphery of the mounting hole 8, so that the sealing ring 22 can increase the sealing between the static iron core 4 and the mounting hole 8.

[0024] The upper end of the shell 3 is covered with a sheath 23, the sheath 23 covers the screw cap 14, the lower end of the sheath 23 is circumferentially and uniformly provided with four fixing rods 24, and the upper end surface of the shell 3 is provided with fixing holes 25 for inserting and fixing the fixing rods 24. The sheath 23 seals and covers the screw cap 14, thereby protecting the screw cap 14.

[0025] The above is only a preferred embodiment of the present application, so equivalent changes or modifications made according to the structure, features and principles described in the patent application range of the present application are included in the patent application range of the present application.

Claims

1. A flow-adjustable two-position three-way electromagnetic valve, comprising a valve body (1) and a coil assembly (2), the coil assembly (2) comprising a housing (3), a static core (4), a dynamic core (5) and a driving spring (6), the housing (3) being mounted on the valve body (1), the static core (4) being inserted into the housing (3), the dynamic core (5) sliding in the housing (3), the driving spring (6) driving the dynamic core (5) away from the static core (4), characterized in that: The upper end of the shell (3) is provided with a screw cap (14), the upper end of the static iron core (4) is provided with a screw rod (26), the screw rod (26) is screwed into the screw cap (14), the circumferential wall of the screw cap (14) is provided with a limiting piece (15), the limiting piece (15) allows the screw cap (14) to be rotatably connected in the upper end of the shell (3).

2. The flow-adjustable two-position three-way electromagnetic valve according to claim 1, wherein The limiting piece (15) comprises a plug rod (16) and a limiting ball (17), the upper end of the shell (3) is provided with a placing groove (13), the lower end of the screw cap (14) is located in the placing groove (13), the upper end of the screw cap (14) is provided with a plug groove (18), the side wall of the lower end of the plug groove (18) is provided with a limiting groove (19), the limiting ball (17) is located in the limiting groove (19), one side of the limiting ball (17) protrudes from the outer side of the screw cap (14), the plug rod (16) is plugged into the plug groove (18), the plug rod (16) limits the limiting ball (17) in the limiting groove (19), the inner circumferential side of the placing groove (13) is circumferentially provided with an annular groove (20) for the sliding of the limiting ball (17).

3. The flow-adjustable two-position three-way electromagnetic valve according to claim 2, wherein The lower end of the plug rod (16) is provided with a guide arc (21) on one side.

4. The flow-adjustable two-position three-way electromagnetic valve according to claim 2, wherein The limiting groove (19) is inclined upward from inside to outside.

5. The flow-adjustable two-position three-way electromagnetic valve according to claim 1, wherein The circumferential side of the static iron core (4) is provided with a sealing ring (22).

6. The flow-adjustable two-position three-way electromagnetic valve according to claim 1, wherein The screw cap (14) is provided with a protective sleeve (23).

7. The flow-adjustable two-position three-way electromagnetic valve according to claim 6, characterized in that The lower end of the protective sleeve (23) is circumferentially and uniformly provided with a plurality of fixing rods (24), and the upper end of the shell (3) is provided with fixing holes (25) for the plug-in fixing of the fixing rods (24).

Images