CN214662254U

CN214662254U - Novel double-electric-control electromagnetic valve

Info

Publication number: CN214662254U
Application number: CN202023306020.1U
Authority: CN
Inventors: 刘勇; 吴厚荣; 倪志升; 倪浩
Original assignee: Zhejiang EMc Pneumatic Technology Co ltd
Current assignee: Zhejiang EMc Pneumatic Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-11-09
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a novel dual-electric control electromagnetic valve, which comprises a valve body, a valve rod and a rear cover, wherein the valve body is provided with a valve cavity and an air inlet, a working port and an air outlet which are communicated with the valve cavity; the two pilot assemblies comprise pilot seats, a pilot cavity and a second piston cavity are arranged in the pilot seats, valve ports communicated with the pilot cavity are arranged in the pilot seats, and coil assemblies for opening and closing the valve ports are arranged on the pilot seats; wherein a second piston cavity is arranged corresponding to the valve rod; a pilot channel and a connecting channel are arranged in the valve body, one end of the pilot channel is communicated with the air inlet, and the other end of the pilot channel is provided with two branches which are correspondingly communicated with the two valve ports one by one; one end of the connecting channel is communicated with the first piston cavity, and the other end of the connecting channel is communicated with the other second piston cavity. The utility model discloses possess simple structure, rationally distributed and easy to assemble's advantage.

Description

Novel double-electric-control electromagnetic valve

Technical Field

The utility model relates to a solenoid valve technical field, in particular to novel dual electric control solenoid valve.

Background

The solenoid valve is an automatic basic element for controlling fluid, belongs to a control element, and is not limited to hydraulic pressure and pneumatic pressure. The electromagnetic valve is widely applied to an industrial automatic control system, and is matched with a circuit to control the direction, flow, speed and other parameters of a medium; the valve rod in the valve body is controlled to move mainly through the pilot assembly, so that the valve rod is reversed. The dual-electric control solenoid valve is a common solenoid valve, for example, "a dual-control solenoid valve" is disclosed in chinese patent application No. CN201921470746.3, two sides of the valve body are respectively provided with a pilot assembly, although the valve rod can be quickly and accurately reversed, the whole solenoid valve is longer in length and occupies a larger space; the wiring is required to be carried out on two sides, integrated wiring cannot be realized, and the installation is relatively troublesome. Therefore, a solenoid valve with two pilot assemblies arranged on the same side is developed, for example, "a dual-electric-control solenoid valve" disclosed in chinese patent application No. CN201910113614.3, although integrated wiring is realized and wiring is more convenient, the structure is more complex and installation is still quite troublesome, and the two pilot assemblies are arranged in parallel along the extension direction of the valve body, so that the problems of long length and large occupied space of the solenoid valve still exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a novel two electric control solenoid valve, possess simple structure, rationally distributed and easy to assemble's advantage.

The above technical purpose of the present invention can be achieved by the following technical solutions: a novel double-electric-control electromagnetic valve comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve rod is arranged in the valve cavity in a sliding mode, an air inlet, a working port and an air outlet which are communicated with the valve cavity are formed in the valve body, a rear cover is arranged on one side of the valve body, a first piston cavity corresponding to the valve rod is arranged in the rear cover, a first piston is arranged in the first piston cavity in a sliding mode, the first piston is abutted against the valve rod, two pilot assemblies are arranged on the other side of the valve body, and the two pilot assemblies are arranged in parallel in the extending direction perpendicular to the valve body;

the two pilot assemblies respectively comprise a pilot seat fixed on the valve body, a pilot cavity and a second piston cavity which are mutually communicated are arranged in the pilot seat, a valve port communicated with the pilot cavity is arranged in the pilot seat, and a coil assembly for opening and closing the valve port is arranged on the pilot seat; one second piston cavity is arranged corresponding to the valve rod, and a second piston abutting against the valve rod is arranged in the second piston cavity;

a pilot channel and a connecting channel are arranged in the valve body, one end of the pilot channel is communicated with the air inlet, and the other end of the pilot channel is provided with two branches which are correspondingly communicated with the two valve ports one by one; one end of the connecting channel is communicated with the first piston cavity, and the other end of the connecting channel is communicated with the other second piston cavity.

Furthermore, a plurality of annular grooves are formed in the valve rod, and flat rings are sleeved between adjacent annular grooves; the sealing performance of the valve rod relative to the valve cavity is improved, and the valve rod is quickly reversed.

Further, the first piston and the second piston are respectively sleeved with a Y-shaped sealing ring, and notches of the Y-shaped sealing rings are back to the valve rod; the relative sealing performance of the first piston cavity and the second piston cavity is improved.

Furthermore, a first balance hole is arranged in the rear cover, one end of the first balance hole is communicated with the first piston cavity, and the other end of the first balance hole at least penetrates through two outer side surfaces of the rear cover; a second balance hole is formed in the guide seat, one end of the second balance hole is communicated with the second piston cavity, and the other end of the second balance hole at least penetrates through two outer side surfaces of the guide seat; the air pressure balance in the first piston cavity and the second piston cavity is ensured, so that the first piston and the second piston move stably and quickly; after the first balance hole or the second balance hole is blocked during installation, other perforated surfaces can still normally suck air and then exhaust air.

Furthermore, the first balance hole and the second balance hole are respectively internally provided with a breathing filter element; the device has the function of reducing noise for discharged gas and also has the function of preventing dust.

Furthermore, a sealing plug is accommodated in the second piston cavity communicated with the connecting channel, an O-ring is arranged between the sealing plug and the side wall of the second piston cavity, an air vent is arranged on the sealing plug in a penetrating manner, one end of the air vent is communicated with the connecting channel, and the other end of the air vent is communicated with the pilot cavity corresponding to the second piston cavity; the tightness of the connecting channel is ensured.

Further, the coil assemblies all comprise sleeves, the bottom ends of the sleeves are fixed on the guide seats through pressing plates, static iron cores are fixed at the top ends of the sleeves, the coil bodies are sleeved on the outer sides of the sleeves, inner cavities of the sleeves are communicated with the guide cavities, movable iron cores are arranged in the sleeves in a sliding mode, first springs are arranged between the movable iron cores and the sleeves in a supporting mode, and the first springs always enable the movable iron cores to tend to close the valve ports.

Furthermore, the coil body is electrically connected with the plug pins, so that the electromagnetic valve is convenient to plug and control and install.

Furthermore, the bottom end of the movable iron core is provided with a convex edge for abutting against one end of the first spring, and the bottom end of the sleeve is provided with a step for abutting against the other end of the first spring.

Further, all be equipped with manual button on the guide seat, manual button with guide seat sliding fit, manual button with it corresponds the setting to move the iron core, manual button with it is equipped with the second spring to support between the guide seat, the second spring orders about manual button keeps away from move the trend of iron core, be equipped with in the guide seat and be used for restricting the separation blade of manual button roll-off.

The utility model has the advantages that: the rear cover is arranged on one side of the valve body, the two pilot assemblies are arranged on the other side of the valve body and arranged in parallel along the extending direction vertical to the valve body, and through reasonable layout, the problem that the solenoid valve is too long in the prior art is effectively solved, so that the solenoid valve is shorter, shorter and more compact, and the installation space is greatly reduced; the two pilot assemblies comprise pilot seats fixed on the valve body, a pilot cavity and a second piston cavity which are communicated with each other are arranged in the pilot seats, valve ports communicated with the pilot cavities are arranged in the pilot seats, and coil assemblies for opening and closing the valve ports are arranged on the pilot seats; a second piston cavity is arranged corresponding to the valve rod, and a second piston abutting against the valve rod is arranged in the second piston cavity; a pilot channel and a connecting channel are arranged in the valve body, one end of the pilot channel is communicated with the air inlet, and the other end of the pilot channel is provided with two branches which are correspondingly communicated with the two valve ports one by one; one end of the connecting channel is communicated with the first piston cavity, and the other end of the connecting channel is communicated with the other second piston cavity; by reasonably planning the gas direction, the corresponding coil assembly is electrified during reversing, so that the corresponding valve port is opened, the valve rod is finally pushed to slide for reversing, the reversing function of the electromagnetic valve is realized, the size of the electromagnetic valve is further effectively reduced, and the electromagnetic valve is more convenient to install; generally, the utility model discloses possess simple structure, rationally distributed and easy to assemble's advantage.

Drawings

Fig. 1 is an overall schematic view of a first embodiment of the present invention.

Fig. 2 is an overall schematic view in another direction of the first embodiment of the present invention.

Fig. 3 is an overall sectional schematic view of the first embodiment of the present invention.

Fig. 4 is a schematic sectional view of a-a in fig. 3.

Fig. 5 is a schematic sectional view of B-B in fig. 3.

Fig. 6 is a schematic structural diagram of a rear cover in the first embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a guide seat according to a first embodiment of the present invention.

Fig. 8 is an overall sectional schematic view of the second embodiment of the present invention.

Shown in the figure: 1-a valve body; 1.1-valve cavity; 1.2-gas inlet; 1.3-working port; 1.4-exhaust port; 1.5-a pilot channel; 1.6-connecting the channels; 2-a valve stem; 2.1-ring groove; 3-rear cover; 3.1 — a first piston chamber; 3.2-first balancing holes; 4-a first piston; 5-a pilot assembly; 51-a pilot seat; 51.1-pilot chamber; 51.2 — a second piston chamber; 51.3-valve port; 51.4-second balance hole; 52-a coil assembly; 521-a sleeve; 521.1-step; 522-a press plate; 523-static iron core; 524-a coil body; 525-movable iron core; 525.1-convex edge; 526-a first spring; 527-pin; 528-screw cap; 53-a second piston; 54-manual button; 55-a second spring; 56-baffle plate; 6-flat ring; 7-Y type seal ring; 8-a breathing filter element; 9-a sealing plug; 9.1-gas-guide holes; 10-O-shaped ring; 11-spring seats; 12-a spring housing; 13-third spring.

Detailed Description

For a more intuitive and complete understanding of the technical solution of the present invention, the following non-limiting characteristic description is now performed by combining the drawings of the present invention:

example one

As shown in fig. 1 to 7, a novel dual-electric-control electromagnetic valve includes a valve body 1, a valve cavity 1.1 is arranged in the valve body 1, a valve rod 2 is slidably arranged in the valve cavity 1.1, the valve body 1 is provided with an air inlet 1.2, a working port 1.3 and an air outlet 1.4 which are communicated with the valve cavity 1.1, one side of the valve body 1 is provided with a rear cover 3, a first piston cavity 3.1 corresponding to the valve rod 2 is arranged in the rear cover 3, a first piston 4 is slidably arranged in the first piston cavity 3.1, the first piston 4 is abutted against the valve rod 2, the other side of the valve body 1 is provided with two pilot assemblies 5, and the two pilot assemblies 5 are arranged side by side in the direction perpendicular to the extending direction of the valve body 1;

the two pilot assemblies 5 respectively comprise a pilot seat 51 fixed on the valve body 1, a pilot cavity 51.1 and a second piston cavity 51.2 which are communicated with each other are arranged in the pilot seat 51, a valve port 51.3 communicated with the pilot cavity 51.1 is arranged in the pilot seat 51, and a coil assembly 52 for opening and closing the valve port 51.3 is arranged on the pilot seat 51; a second piston cavity 51.2 is arranged corresponding to the valve rod 2, and a second piston 53 abutting against the valve rod 2 is arranged in the second piston cavity 51.2;

a pilot channel 1.5 and a connecting channel 1.6 are arranged in the valve body 1, one end of the pilot channel 1.5 is communicated with the air inlet 1.2, and the other end of the pilot channel 1.5 is provided with two branches which are communicated with the two valve ports 51.3 in a one-to-one correspondence manner; one end of the connecting channel 1.6 communicates with the first piston chamber 3.1 and the other end of the connecting channel 1.6 communicates with the other second piston chamber 51.2.

A plurality of annular grooves 2.1 are formed in the valve rod 2, and flat rings 6 are sleeved between the adjacent annular grooves 2.1; specifically, two working ports 1.3 are arranged, two exhaust ports 1.4 are also arranged, and the annular groove 2.1 is arranged corresponding to each air port to ensure normal air intake and exhaust.

The first piston 4 and the second piston 53 are respectively sleeved with a Y-shaped sealing ring 7, and the notches of the Y-shaped sealing rings 7 are back to the valve rod 2.

A first balance hole 3.2 is arranged in the rear cover 3, one end of the first balance hole 3.2 is communicated with the first piston cavity 3.1, and the other end of the first balance hole 3.2 at least penetrates through two outer side surfaces of the rear cover 3, so that the other surfaces can normally suck and exhaust air even if the first balance hole 3.2 at one surface is blocked after installation; a second balance hole 51.4 is arranged in the pilot base 51, one end of the second balance hole 51.4 is communicated with the second piston cavity 51.2, and the other end of the second balance hole 51.4 at least penetrates through two outer side surfaces of the pilot base 51, so that even if the second balance hole 51.4 is blocked after installation, other surfaces can normally suck and exhaust air; the first balancing hole 3.2 and the second balancing hole 51.4 house a breathing cartridge 8, respectively (see in particular fig. 6 and 7).

When the first piston 4 slides downwards or downwards relative to the rear cover 3, the first balance hole 3.2 exhausts internal gas or sucks external gas; when the second piston 53 slides downwards or downwards relative to the guide seat 53, the second balance hole 5.4 exhausts internal gas or sucks external gas, so that the corresponding piston moves stably and reliably.

A sealing plug 9 is arranged in a second piston cavity 51.2 communicated with the connecting channel 1.6, an O-shaped ring 10 is arranged between the sealing plug 9 and the side wall of the second piston cavity 51.2, an air guide hole 9.1 penetrates through the sealing plug 9, one end of the air guide hole 9.1 is communicated with the connecting channel 1.6, and the other end of the air guide hole 9.1 is communicated with a pilot cavity 51.1 corresponding to the second piston cavity 51.2; specifically, an O-shaped ring 10 is also arranged at the position, corresponding to the connecting channel 1.6, of the valve body 1, so that the sealing performance of the connecting channel 1.6 is ensured.

It should be noted that the two pilot assemblies 5 have the same structure, and the two pilot bases 51 are also manufactured by the same mold, which is different in that the second piston 53 corresponding to the valve rod 2 is arranged in the left pilot base 51, and the right pilot base 51 is filled with the sealing plug 9, so that the air passage is ensured to normally pass through, and the mold opening for the right pilot base 51 is not required again, that is, the cost is saved, and the installation is convenient (refer to fig. 4 specifically).

The coil assemblies 52 all comprise sleeves 521, the bottom ends of the sleeves 521 are fixed on the guide seat 51 through pressing plates 522, the top ends of the sleeves 521 are fixed with static iron cores 523, the outer sides of the sleeves 521 are sleeved with coil bodies 524, pins 527 are electrically connected to the coil bodies 524, the inner cavities of the sleeves 521 are communicated with the guide cavity 51.1, movable iron cores 525 are arranged in the sleeves 521 in a sliding mode, first springs 526 are arranged between the movable iron cores 525 and the sleeves 521 in a supporting mode, and the first springs 526 always tend to enable the movable iron cores 525 to close the valve ports 51.3; specifically, the outer end of the stationary core 523 is further provided with a nut 528.

Under normal conditions, the movable iron core 525 is under the elastic force of the first spring 526, and the corresponding valve port 51.3 is tightly closed, when one of the coil bodies 524 is energized and generates electromagnetic force, the corresponding stationary iron core 523 attracts the lower movable iron core 525, overcoming the elastic force of the first spring 526, and the corresponding valve port 51.3 is opened.

The bottom end of the movable iron core 525 is provided with a convex edge 525.1 for abutting against one end of the first spring 526, and the bottom end of the sleeve 521 is provided with a step 521.1 for abutting against the other end of the first spring 526.

The pilot bases 51 are respectively provided with a manual button 54, the manual buttons 54 are in sliding fit with the pilot bases 51, the manual buttons 54 are arranged corresponding to the movable iron core 525, a second spring 55 is arranged between the manual buttons 54 and the pilot bases 51 in a supporting manner, the second spring 55 drives the manual buttons 54 to move away from the movable iron core 525, and a blocking piece 56 used for limiting the manual buttons 54 to slide out is arranged in the pilot bases 51; preferably, the inner end of the manual button 54 is tapered.

When the valve port 51.3 is opened and closed manually, the manual button 54 can be pressed manually to overcome the elastic force of the second spring 55, and the inner end of the manual button 54 pushes the movable iron core 525, so that the movable iron core 525 overcomes the elastic force of the first spring 526, and the corresponding valve port 51.3 is opened.

The utility model discloses a concrete theory of operation as follows: as specifically illustrated in fig. 3 to 5, normally, two working ports 1.3 are connected to corresponding actuators, an air inlet 1.2 is connected to an air source, two air outlets 1.4 are usually connected to a silencer, a left valve port 51.3 is not opened, a right pilot assembly 5 is powered, the corresponding static iron core 523 attracts the movable iron core 525 to open the right valve port 51.3, the gas enters the valve cavity 1.1 through the gas inlet 1.2, a part of the gas is shunted to the two valve ports 51.3 through the pilot channel 1.5, the left pilot gas cannot flow into the left pilot cavity 51.1 because the corresponding movable iron core 525 closes the valve port 51.3, the pilot gas on the right side sequentially passes through the valve port 51.3, the pilot cavity 51.1, the gas guide hole 9.1 and the connecting channel 1.6, finally flows into the first piston cavity 3.1 to push the first piston 4, so that the valve stem 2 moves upwards with respect to the valve body 1, while the valve stem 2 also pushes the second piston 53 and keeps the valve stem 2 above; the other part of the gas flows to the lower working port 1.3 through the valve cavity 1.1, meanwhile, the lower exhaust port 1.4 is in a closed state, and the gas in the actuating element is exhausted to the atmosphere through the upper working port 1.3 and the valve cavity 1.1 and finally through the upper exhaust port 1.4;

when reversing is needed, the left pilot assembly 5 is electrified, the right pilot assembly 5 is not electrified, so that the left valve port 51.3 is opened, the right valve port 51.3 is closed, the left pilot gas sequentially flows into the corresponding second piston cavity 51.2 through the corresponding valve port 51.3 and the pilot cavity 51.1 to push the second piston 53, so that the valve rod 2 moves downwards relative to the valve body 1, and meanwhile, the valve rod 2 pushes the first piston 4 to move downwards, so that reversing is completed, at the moment, the upper exhaust port 1.4 is closed, the lower exhaust port 1.4 is opened, the other part of gas in the gas inlet 1.2 flows to the upper working port 1.3 through the valve cavity 1.1, and the gas in the actuating element flows through the lower working port 1.3 and the valve cavity 1.1 and is finally exhausted from the lower exhaust port 1.4.

Example two

As shown in fig. 8, the structure principle of the second embodiment is basically the same as that of the first embodiment, except that the first embodiment is a two-position five-way valve, the present embodiment is different in that the annular grooves 2.1 on the valve rod 2 are different from those of the first embodiment in number and distribution, a spring seat 11 is pressed between the valve body 1 and the rear cover 3, the spring seat 11 is in a sleeve shape, the end part of the valve rod 2 penetrates through the spring seat 11 and extends into the first piston cavity 3.1, two spring sleeves 12 are sleeved in the spring seat 11, the two spring sleeves 12 are distributed at two ends of the spring seat 11 and are in sliding fit with the valve rod 2, a stepped shaft matched with the stop of the spring sleeve 12 at one side is arranged on the valve rod 2, a shaft snap spring matched with the stop of the spring sleeve 12 at the other side is also arranged on the valve rod 2, a third spring 13 is arranged between the two spring sleeves 12 in a propping manner, and the third spring 13 always tends to keep the valve rod 2 at a middle position;

the working principle is basically the same as that of the first embodiment, and only when the valve rod 2 is reversed, the elastic force of the third spring 13 needs to be overcome and the valve rod is kept at the reversed position, and the specific working principle is not described in detail here.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. The utility model provides a novel two electric control solenoid valve, includes valve body (1), be equipped with valve pocket (1.1) in valve body (1), it is equipped with valve rod (2) to slide in valve pocket (1.1), seted up the intercommunication on valve body (1) air inlet (1.2), work opening (1.3) and gas vent (1.4) of valve pocket (1.1), one side of valve body (1) is equipped with back lid (3), be equipped with in back lid (3) with first piston chamber (3.1) that valve rod (2) correspond, it is equipped with first piston (4) to slide in first piston chamber (3.1), first piston (4) with valve rod (2) offset and set up its characterized in that: two pilot assemblies (5) are arranged on the other side of the valve body (1), and the two pilot assemblies (5) are arranged in parallel along the extending direction vertical to the valve body (1);

the two pilot assemblies (5) respectively comprise a pilot seat (51) fixed on the valve body (1), a pilot cavity (51.1) and a second piston cavity (51.2) which are communicated with each other are arranged in the pilot seat (51), a valve port (51.3) communicated with the pilot cavity (51.1) is arranged in the pilot seat (51), and a coil assembly (52) for opening and closing the valve port (51.3) is arranged on the pilot seat (51); one second piston cavity (51.2) is arranged corresponding to the valve rod (2), and a second piston (53) which is abutted against the valve rod (2) is arranged in the second piston cavity (51.2);

a pilot channel (1.5) and a connecting channel (1.6) are arranged in the valve body (1), one end of the pilot channel (1.5) is communicated with the air inlet (1.2), and the other end of the pilot channel (1.5) is provided with two branches which are correspondingly communicated with the two valve ports (51.3) one by one; one end of the connecting channel (1.6) is communicated with the first piston cavity (3.1), and the other end of the connecting channel (1.6) is communicated with the other second piston cavity (51.2).

2. A novel dual electric control electromagnetic valve according to claim 1, characterized in that: a plurality of annular grooves (2.1) are formed in the valve rod (2), and flat rings (6) are sleeved between the adjacent annular grooves (2.1).

3. A novel dual electric control electromagnetic valve according to claim 1, characterized in that: first piston (4) with it is equipped with Y type sealing washer (7) to overlap respectively on second piston (53), the notch of Y type sealing washer (7) all dorsad valve rod (2).

4. A novel dual electric control electromagnetic valve according to claim 1, characterized in that: a first balance hole (3.2) is formed in the rear cover (3), one end of the first balance hole (3.2) is communicated with the first piston cavity (3.1), and the other end of the first balance hole (3.2) at least penetrates through two outer side faces of the rear cover (3); a second balance hole (51.4) is arranged in the guide seat (51), one end of the second balance hole (51.4) is communicated with the second piston cavity (51.2), and the other end of the second balance hole (51.4) at least penetrates through two outer side faces of the guide seat (51).

5. The novel dual-electric-control solenoid valve as claimed in claim 4, wherein: the first balance hole (3.2) and the second balance hole (51.4) are respectively provided with a breathing filter element (8).

6. The novel dual-electric-control solenoid valve as claimed in claim 4, wherein: a sealing plug (9) is arranged in the second piston cavity (51.2) communicated with the connecting channel (1.6), an O-shaped ring (10) is arranged between the sealing plug (9) and the side wall of the second piston cavity (51.2), an air guide hole (9.1) penetrates through the sealing plug (9), one end of the air guide hole (9.1) is communicated with the connecting channel (1.6), and the other end of the air guide hole (9.1) is communicated with the pilot cavity (51.1) corresponding to the second piston cavity (51.2).

7. A novel dual electric control solenoid valve as claimed in any one of claims 1 to 6, wherein: the coil assembly (52) comprises sleeves (521), the bottom ends of the sleeves (521) are fixed on the guide seat (51) through pressing plates (522), static iron cores (523) are fixed at the top ends of the sleeves (521), coil bodies (524) are sleeved on the outer sides of the sleeves (521), inner cavities of the sleeves (521) are communicated with the guide cavity (51.1), movable iron cores (525) are arranged in the sleeves (521) in a sliding mode, first springs (526) are arranged between the movable iron cores (525) and the sleeves (521) in a supporting mode, and the first springs (526) always enable the movable iron cores (525) to close the valve ports (51.3).

8. The novel dual-electric-control solenoid valve as claimed in claim 7, wherein: the coil body (524) is electrically connected with pins (527).

9. A novel dual-electric-control electromagnetic valve according to claim 8, characterized in that: the bottom end of the movable iron core (525) is provided with a convex edge (525.1) for abutting against one end of the first spring (526), and the bottom end of the sleeve (521) is provided with a step (521.1) for abutting against the other end of the first spring (526).

10. A novel dual-electric-control electromagnetic valve according to claim 9, characterized in that: all be equipped with manual button (54) on leading seat (51), manual button (54) with leading seat (51) sliding fit, manual button (54) with move iron core (525) and correspond the setting, manual button (54) with support between leading seat (51) and be equipped with second spring (55), second spring (55) orders about manual button (54) are kept away from move the trend of iron core (525), be equipped with in leading seat (51) and be used for the restriction separation blade (56) of manual button (54) roll-off.