CN216923379U

CN216923379U - Normally open type two-position three-way electromagnetic valve

Info

Publication number: CN216923379U
Application number: CN202220099719.5U
Authority: CN
Inventors: 尹宏柏; 夏家永
Original assignee: NINGBO LIDA PNEUMATIC COMPLETE SETS CO Ltd
Current assignee: NINGBO LIDA PNEUMATIC COMPLETE SETS CO Ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-07-08
Anticipated expiration: 2032-01-12

Abstract

The utility model discloses a normally-open two-position three-way electromagnetic valve which comprises a coil assembly and a valve seat, wherein the coil assembly comprises an outer plastic-coated body, an air inlet channel and a working channel are formed in the valve seat, sleeves are arranged in an inner cavity of the outer plastic-coated body and an inner cavity of the valve seat, a movable iron core and a static iron core are arranged in the inner cavity of each sleeve, a coil acts on the static iron core, an exhaust hole communicated with the inner cavity of each sleeve is formed in the outer plastic-coated body, the static iron core is blocked at an air outlet end of the air inlet channel and is positioned between the movable iron core and the air inlet channel, an installation channel is formed in the movable iron core, and an air flow channel communicated with the working channel is formed between the outer wall of the static iron core and the outer wall of the movable iron core and the inner cavity of each sleeve. The electromagnetic valve provided by the utility model can be conveniently electrified to control and change the internal channel of the electromagnetic valve, and can ensure the stability of the continuous use of the electromagnetic valve.

Description

Normally open type two-position three-way electromagnetic valve

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to a normally-open two-position three-way electromagnetic valve.

Background

The electromagnetic valve is an industrial equipment controlled by electromagnetism, is an automatic basic element for changing the direction or on-off of fluid, and belongs to a pneumatic control element. Used in industrial control systems to regulate the direction, flow, velocity and other parameters of a medium. The electromagnetic valve can be matched with different circuits to realize expected control, and the precision and flexibility of the control can be ensured. There are many types of solenoid valves, with different solenoid valves functioning at different locations in the control system. The three-way in the two-position three-way electromagnetic valve means that a finger valve has three air ports which are generally marked as an air inlet, a working hole and an exhaust hole; two-position means that the valve has two working positions, namely an unpowered state and a powered state; the non-energized state is the initial state, and the energized state is the second operating state.

Through the retrieval, patent application No. 201120008814.1's utility model discloses a solenoid valve, it utilizes coil pack to open and close, and current solenoid valve is comparatively troublesome when realizing the function of normally opening, and lacks stability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a normally-open two-position three-way electromagnetic valve which is designed for solving the defects of the prior art.

The utility model discloses a normally-open two-position three-way electromagnetic valve which comprises a coil assembly and a valve seat, wherein the coil assembly comprises an outer plastic-coated body, an air inlet channel and a working channel are formed in the valve seat, sleeves are arranged in an inner cavity of the outer plastic-coated body and an inner cavity of the valve seat, a movable iron core and a static iron core are arranged in the inner cavity of each sleeve, a coil acts on the static iron core, an exhaust hole communicated with the inner cavity of each sleeve is formed in the outer plastic-coated body, the static iron core is blocked at an air outlet end of the air inlet channel and is positioned between the movable iron core and the air inlet channel, an installation channel is formed in the movable iron core, an air flow channel communicated with the working channel is formed between the outer wall of the static iron core and the movable iron core and the inner cavity of the sleeves, two sealing plugs are respectively arranged at two ends of the movable iron core and are respectively matched with the upper end and the lower end of the installation channel.

Further, the sheathed tube top is equipped with the exhaust post, the sheathed tube inner chamber is as gas passage, it sets gradually in the inboard top of sleeve pipe and bottom to move iron core and quiet iron core, the exhaust hole sets up in the exhaust post and with move the iron core cooperation, wherein quiet iron core supports fixedly by sheathed tube bottom, and quiet iron core is opened there is the gas outlet to correspond with inlet channel and sheathed tube inner chamber respectively, the external diameter that moves iron core and quiet iron core all sets up the mill limit and communicates working channel and exhaust hole respectively, inlet channel and working channel, it is equipped with the stabilizing component to move iron core and quiet iron core department of meeting, the stabilizing component includes guide and atmospheric pressure stabilizing element.

Furthermore, a screw cap is arranged between the exhaust column and the outer plastic-coated body for installation.

Further, the guide piece comprises an outer spring arranged between the movable iron core and the static iron core.

Furthermore, step surfaces are formed at the bottom of the movable iron core and the top of the static iron core and used as mounting grooves for mounting external springs.

Furthermore, the air pressure stabilizing piece comprises an exhaust plug and an air inlet plug which are respectively arranged at the upper end and the lower end of the movable iron core internal installation channel, and an inner spring is arranged between the exhaust plug and the air inlet plug.

Further, the air pressure stabilizing part further comprises an air pressure balancing hole arranged in the middle of the movable iron core, the air pressure balancing hole is communicated between the air exhaust plug and the air inlet plug, the air exhaust plug is movably arranged at the top of the inner side of the movable iron core, and the air inlet plug is fixedly embedded at the bottom of the inner side of the movable iron core.

Furthermore, a protective pressing plate is arranged between the outer plastic-coated body and the valve seat, and a countersunk head screw is arranged between the protective pressing plate and the valve seat for installation.

Furthermore, sealing elements are arranged at the joint of the exhaust column and the sleeve, the joint of the sleeve and the valve seat and the joint of the static iron core and the valve seat.

Further, the sealing member includes a first O-ring, a second O-ring and a third O-ring respectively disposed on the exhaust column, the sleeve and the stationary core.

According to the normally-open two-position three-way electromagnetic valve designed by the utility model, the movable iron core and the static iron core are arranged, the channels of the air inlet channel and the working channel can be opened through air pressure when the electromagnetic valve is not electrified, an outer spring of the movable iron core can be additionally arranged to assist in opening the channels of the air inlet channel and the working channel by utilizing elasticity, the movable iron core is close to the static iron core under the action of magnetic force to seal the air outlet, the top of the movable iron core opens the exhaust hole, and at the moment, the channels from the working channel to the inner cavity of the sleeve and then to the exhaust hole are communicated, so that the channel state of the electromagnetic valve is changed through electrification control; by arranging the stabilizing assembly, the guide assembly can ensure that the self position of the movable iron core is not inclined when the electromagnetic valve is controlled to change, so that stable use is ensured; the function of the air pressure stabilizing piece in the stabilizing assembly is to ensure that when the interior of the electromagnetic valve is ventilated, the interior of the electromagnetic valve has a certain buffering function, so that the internal pressure resistance of the electromagnetic valve during operation is improved;

the normally-open two-position three-way electromagnetic valve designed by the utility model has the advantages that the stability of the electromagnetic valve in use is improved under the action of the arranged protective pressing plate, the electromagnetic valve can be conveniently disassembled and assembled due to the arrangement of the protective pressing plate, the arranged countersunk head screw ensures that no redundant space is occupied after the protective pressing plate is installed, and the compact structure of the electromagnetic valve is ensured.

Drawings

FIG. 1 is a schematic sectional view showing the structure of example 1;

FIG. 2 is a schematic view of the entire structure of embodiment 1;

FIG. 3 is a schematic view of the structure cut away from the protective platen;

FIG. 4 is a schematic sectional view of the exhaust column of example 1;

fig. 5 is a schematic sectional structure view of the movable core of embodiment 1;

fig. 6 is a schematic sectional view of the stationary core and the valve seat of embodiment 1.

In the figure: the air-vent structure comprises an air-vent column 1, an air vent hole 101, a sleeve 2, a screw cap 3, a first O-shaped ring 4, a movable iron core 5, an air-vent plug 6, a coil assembly 7, an outer spring 8, an inner spring 9, an air inlet plug 10, a static iron core 11, an air outlet 1101, a protective pressure plate 12, a second O-shaped ring 13, a working channel 14, a third O-shaped ring 15, a countersunk screw 16, a valve seat 17, an outer plastic body 18, an air pressure balance hole 19, an air inlet channel 20, an installation channel 21 and an air flow channel 22.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

Example 1:

as shown in fig. 1 to 6, the normally open two-position three-way electromagnetic valve described in this embodiment includes a coil assembly 7 and a valve seat 17, the coil assembly 7 includes an outer plastic body 18, an air inlet channel 20 and a working channel 14 are opened on the valve seat 17, a sleeve 2 is disposed in an inner cavity of the outer plastic body 18 and an inner cavity of the valve seat 17, a movable iron core 5 and a static iron core 11 are disposed in an inner cavity of the sleeve 2, and when in use, a magnetic force generated by the coil assembly 7 in the inner cavity of the sleeve 2 controls the movable iron core 5 to further control the valve to open and close;

specifically, the coil assembly 7 is provided with a coil acting on a static iron core 11, an exhaust hole 101 communicated with the inner cavity of the sleeve 2 is arranged on an outer plastic body 18, the static iron core 11 is blocked at the air outlet end of an air inlet channel 20, the static iron core 11 is positioned between a movable iron core 5 and the air inlet channel 20, an installation channel 21 is arranged on the movable iron core 5, an air flow channel 22 communicated with the working channel 14 is formed between the outer wall of the static iron core 11 and the inner cavity of the sleeve 2, two ends of the movable iron core 5 are respectively provided with a sealing plug, the two sealing plugs are respectively matched with the upper end and the lower end of the installation channel 21, when the static iron core 11 is not electrified, the coil assembly 7 at one side of the static iron core 11 does not change and does not generate magnetic force, namely, the movable iron core 5 cannot be adsorbed by the movable iron core 5, at the moment, the channel from the air inlet channel 20 to the working channel 14 can be communicated, namely, the air pressure at the air inlet channel 20 pushes against the self gravity of the movable iron core 5 to open the channel and open the channel 14, the movable iron core 5 can be lifted only by air pressure, at the moment, under the continuous action of the air pressure, the top of the movable iron core 5 blocks the exhaust hole 101, namely, the circulation from the air inlet channel 20 to the air flow channel 22 to the working channel 14 is realized, and the movable iron core 5 is jacked by the air pressure to ensure that the air electromagnetic valve is in a normally open state when the air electromagnetic valve is not electrified; when the power is on, magnetic force is generated on one side of the static iron core 11 due to the coil assembly 7, the movable iron core 5 is close to the static iron core 11 to seal the air outlet 1101 under the action of the magnetic force, the top of the movable iron core 5 opens the exhaust hole 101, and at the moment, the channel from the working channel 14 to the exhaust hole 101 is communicated, namely, the channel from the working channel 14 to the air flow channel 22 to the exhaust hole 101 is communicated. The different air flow directions before and after the electrification realize the electrification control to change the channel state of the electromagnetic valve.

According to the utility model, the top of a sleeve 2 is provided with an exhaust column 1, the exhaust column 1 assists in gas delivery, the inner cavity of the sleeve 2 serves as a gas channel, as shown in fig. 1, a movable iron core 5 and a static iron core 11 are sequentially arranged at the top and the bottom of the inner side of the sleeve 2, an exhaust hole 101 is arranged in the exhaust column 1 and matched with the movable iron core 5, wherein the static iron core 11 is supported and fixed by the bottom of the sleeve 2, an air outlet 1101 is formed in the static iron core 11 and corresponds to an air inlet channel 20 and the inner cavity of the sleeve 2 respectively, the outer diameters of the movable iron core 5 and the static iron core 11 are provided with milled edges which are respectively communicated with a working channel 14 and the exhaust hole 101, the air inlet channel 20 and the working channel 14, a stabilizing assembly is arranged at the joint of the movable iron core 5 and the static iron core 11, and comprises a guide member and a gas pressure stabilizing member; the sleeve 2 is easy to replace and convenient to maintain; by arranging the stabilizing assembly, the guide assembly can ensure that the self position of the movable iron core 5 is not inclined when the electromagnetic valve is controlled to change, and the resistance and the abrasion of the movable iron core 5 during movement are reduced, so that the stable use is ensured; and the effect of stabilizing the air pressure stabilizing part in the subassembly is then when guaranteeing to ventilate in the solenoid valve, and its inside has certain cushioning effect, increases the inside compressive capacity when this solenoid valve operation.

In the utility model, the nut 3 is arranged between the exhaust column 1 and the outer plastic-coated body 18 for installation, the stability of air outlet of the top exhaust hole 101 is improved after the nut 3 is installed, meanwhile, a tool is additionally arranged at one end of the exhaust column 1 for the electromagnetic valve to use conveniently, the bottom of the nut 3 can also be provided with an anti-slip groove, the top of the coil component 7 is provided with a corresponding convex block, and the anti-slip groove is buckled with the convex block to prevent the nut 3 from loosening when the nut 3 is locked.

In the utility model, the guide piece comprises an outer spring 8 arranged between the movable iron core 5 and the static iron core 11, step surfaces are arranged at the bottom of the movable iron core 5 and the top of the static iron core 11 and used as mounting grooves for mounting the outer spring 8, certainly, corresponding step surfaces can be arranged at the position, corresponding to the outer spring 8, of the static iron core 11 to position the outer spring 8, and meanwhile, the outer spring 8 is prevented from being skewed, simultaneously, the milling edges on the movable iron core 5 and the static iron core 11 can effectively enable corresponding channels to smoothly circulate, the movable iron core 5 is not easy to be skewed when moving up and down under the action of the outer spring 8, and when the outer spring 8 is not electrified, the outer spring 8 can automatically jack the movable iron core 5 (the outer spring 8 can properly reduce the elasticity to be matched with air pressure to jack the movable iron core 5), so that the use is convenient; when the power is on, the magnetic force generated by the coil assembly 7 at one side of the static iron core 11 overcomes the elastic action of the outer spring 8 to close the channel between the movable iron core 5 and the static iron core 11; the air pressure stabilizing part comprises an exhaust plug 6 and an air inlet plug 10 which are respectively arranged at the upper end and the lower end of an installation channel 21 in the movable iron core 5, an inner spring 9 is arranged between the exhaust plug 6 and the air inlet plug 10, the spring 9 supports the exhaust plug 6 and the air inlet plug 10 to ensure that the exhaust plug 6 and the air inlet plug 10 are stable in position in the movable iron core 5, and the exhaust plug 6 and the air inlet plug 10 can also increase air tightness when in normal use; the atmospheric pressure stabilizing part is still including setting up in the atmospheric pressure balancing hole 19 at moving iron core 5 middle part, atmospheric pressure balancing hole 19 communicates between air cock 6 and air inlet plug 10, wherein air cock 6 movable mounting is in moving iron core 5's inboard top, air inlet plug 10 is fixed to be inlayed in moving iron core 5 inboard bottom, and when working channel 14 got into gas, because air inlet plug 10 is fixed and air cock 6 can be mobile in moving iron core 5, the atmospheric pressure effect moves iron core 5 internal spring 9 of downward compression this moment, carry out cushioning effect through here, thereby balanced partial atmospheric pressure, prevent the breathing out, in order to prevent the action not smooth, guarantee the inside compressive capacity of this solenoid valve.

In the utility model, a protective pressure plate 12 is arranged between an outer plastic body 18 and a valve seat 17, and a sleeve 2 passes through the protective pressure plate 12; the protection clamp plate 12 and the valve seat 17 are provided with the countersunk screws 16 for installation, the stability of the electromagnetic valve during use is improved under the action of the protection clamp plate 12, the protection clamp plate 12 can be conveniently disassembled and assembled, the countersunk screws 16 enable the protection clamp plate 12 to be installed, no redundant space is occupied, and the electromagnetic valve is guaranteed to be compact in structure.

In the utility model, sealing elements are arranged at the joints of the exhaust column 1 and the sleeve 2, the joints of the sleeve 2 and the valve seat 17 and the joints of the static iron core 11 and the valve seat 17, the sealing elements comprise a first O-shaped ring 4, a second O-shaped ring 13 and a third O-shaped ring 15 which are respectively arranged on the exhaust column 1, the sleeve 2 and the static iron core 11, and the sealing elements are arranged to increase the air tightness among all channels.

In the implementation of the embodiment, the static iron core 11 in the inner cavity of the sleeve 2 generates magnetic force to control the movable iron core 5 and further control the opening and closing of the valve under the action of the coil assembly 7; when the power is not supplied, the coil component 7 at one side of the static iron core 11 does not change, does not generate magnetic force, namely, does not adsorb the movable iron core 5, and realizes the circulation of the airflow channel 22 and the working channel 14; when the power is on, magnetic force is generated on one side of the static iron core 11 due to the coil assembly 7, and the movable iron core 5 is close to the static iron core 11 under the action of the magnetic force to seal the air outlet 1101, so that the air flow channel 22 is communicated with the air exhaust hole 101; by arranging the stabilizing assembly, the guide assembly can ensure that the self position of the movable iron core 5 is not inclined when the electromagnetic valve is controlled to change, so that stable use is ensured; the function of the air pressure stabilizing piece in the stabilizing assembly is to ensure that when the interior of the electromagnetic valve is ventilated, the interior of the electromagnetic valve has a certain buffering function, so that the internal pressure resistance of the electromagnetic valve during operation is improved; under the action of the arranged outer spring 8, the movable iron core 5 is not easy to skew when moving up and down, and when the power is not switched on, the outer spring 8 can automatically jack up the movable iron core 5, so that the use is convenient; when the power is on, the magnetic force generated by the coil assembly 7 at one side of the static iron core 11 overcomes the elastic action of the outer spring 8 to close the channel between the movable iron core 5 and the static iron core 11; when gas enters the working channel 14, the air inlet plug 10 is fixed, the air outlet plug 6 can be movably arranged in the movable iron core 5, at the moment, the movable iron core 5 compresses the inner spring 9 downwards under the action of air pressure, and the air pressure is buffered through the position, so that partial air pressure is balanced, and the internal pressure resistance of the electromagnetic valve is ensured; through the effect of protection clamp plate 12, stability when increasing this solenoid valve and using, set up simultaneously protection clamp plate 12 and can conveniently carry out the dismouting of solenoid valve, the countersunk screw 16 that sets up does not occupy unnecessary space behind the installation protection clamp plate 12, guarantees the compact structure of solenoid valve, sets up first O type circle 4, second O type circle 13 and third O type circle 15 and increases the gas tightness between each passageway.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.

Claims

1. The normally-open two-position three-way electromagnetic valve comprises a coil assembly (7) and a valve seat (17), wherein the coil assembly (7) comprises an outer plastic body (18), an air inlet channel (20) and a working channel (14) are arranged on the valve seat (17), a sleeve (2) is arranged in an inner cavity of the outer plastic body (18) and an inner cavity of the valve seat (17), a movable iron core (5) and a static iron core (11) are arranged in an inner cavity of the sleeve (2), the normally-open two-position three-way electromagnetic valve is characterized in that the coil assembly (7) is provided with a coil acting on the static iron core (11), an exhaust hole (101) communicated with the inner cavity of the sleeve (2) is arranged on the outer plastic body (18), the static iron core (11) is plugged at the air outlet end of the air inlet channel (20), the static iron core (11) is positioned between the movable iron core (5) and the air inlet channel (20), an installation channel (21) is arranged on the movable iron core (5), and an air flow through communicated with the working channel (14) is formed between the outer wall of the movable iron core (5) and the inner cavity of the sleeve (2) And sealing plugs are respectively arranged at two ends of the movable iron core (5) of the channel (22), and the sealing plugs at the two ends are respectively matched with the upper end and the lower end of the installation channel (21).

2. The normally open two-position three-way electromagnetic valve according to claim 1, characterized in that an exhaust column (1) is arranged at the top of the sleeve (2), an inner cavity of the sleeve (2) is used as a gas passage, the movable iron core (5) and the static iron core (11) are sequentially arranged at the top and the bottom of the inner side of the sleeve (2), the exhaust holes (101) are arranged in the exhaust column (1) and are matched with the movable iron core (5), wherein the static iron core (11) is supported and fixed by the bottom of the sleeve (2), the static iron core (11) is provided with gas outlets (1101) respectively corresponding to the gas inlet passage (20) and the inner cavity of the sleeve (2), the outer diameters of the movable iron core (5) and the static iron core (11) are respectively provided with milling edges which are respectively communicated with the working passage (14) and the exhaust holes (101), the gas inlet passage (20) and the working passage (14), and a stabilizing component is arranged at the joint of the movable iron core (5) and the static iron core (11), the stabilizing assembly includes a guide and a pneumatic stabilizer.

3. A normally open two-position three-way solenoid valve according to claim 2, wherein a nut (3) is provided between the exhaust column (1) and the outer casing (18) for installation.

4. A normally open two-position three-way solenoid valve according to claim 2, characterized in that said guide comprises an external spring (8) arranged between the movable core (5) and the stationary core (11).

5. The normally open two-position three-way electromagnetic valve according to claim 4, wherein the bottom of the movable iron core (5) and the top of the static iron core (11) are provided with stepped surfaces as mounting grooves for mounting the outer spring (8).

6. The normally open two-position three-way electromagnetic valve according to claim 2, wherein the air pressure stabilizing member comprises an exhaust plug (6) and an air inlet plug (10) which are respectively arranged at the upper end and the lower end of the installation channel (21) in the movable iron core (5), and an inner spring (9) is arranged between the exhaust plug (6) and the air inlet plug (10).

7. The normally open two-position three-way electromagnetic valve according to claim 6, wherein the air pressure stabilizing member further comprises an air pressure balancing hole (19) disposed in the middle of the movable iron core (5), the air pressure balancing hole (19) is communicated between the vent plug (6) and the air inlet plug (10), wherein the vent plug (6) is movably mounted on the top of the inner side of the movable iron core (5), and the air inlet plug (10) is fixedly embedded in the bottom of the inner side of the movable iron core (5).

8. A normally open two-position three-way electromagnetic valve according to any one of claims 1 to 7, characterized in that a protective pressure plate (12) is arranged between the outer plastic body (18) and the valve seat (17), and a countersunk screw (16) is arranged between the protective pressure plate (12) and the valve seat (17) for installation.

9. The normally open two-position three-way electromagnetic valve according to claim 2, wherein sealing elements are arranged at the joint of the exhaust column (1) and the sleeve (2), the joint of the sleeve (2) and the valve seat (17), and the joint of the static iron core (11) and the valve seat (17).

10. A normally open two-position three-way electromagnetic valve according to claim 9, wherein the sealing means comprise a first O-ring (4), a second O-ring (13) and a third O-ring (15) respectively arranged on the exhaust column (1), the sleeve (2) and the static iron core (11).