CN212203169U

CN212203169U - High-pressure normally-closed emergency cut-off electromagnetic valve

Info

Publication number: CN212203169U
Application number: CN202020847393.0U
Authority: CN
Inventors: 杨顺江; 谢勇; 张伟; 杨俊�
Original assignee: Chongqing Kaibairui Valve Co ltd
Current assignee: Chongqing Kaibairui Valve Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-12-22
Anticipated expiration: 2030-05-19

Abstract

The utility model discloses a high pressure normal close promptly cuts off solenoid valve, include valve body, piston, end cap seat, pull rod mechanism, do not have the magnet tube, move iron core and coil. Be equipped with air nozzle and valve pocket in the valve body, the piston is installed in the valve pocket and is located air nozzle department, and the piston includes main part, piston rod, piston frame and coupling nut, and one side of piston frame is run through and is seted up the orifice, and the pilot hole has been seted up to the main part. The plug seat is movably arranged on the connecting nut and positioned above the pilot hole, the lower end of the non-magnetic pipe is fixedly connected with the valve body, the movable iron core is movably arranged in the non-magnetic pipe and connected with the plug seat, and the coil is arranged on the non-magnetic pipe. The pull rod mechanism is movably arranged on the non-magnetic tube, and the lower end of the pull rod mechanism is connected with the plug seat through the movable iron core spring. The utility model adopts the principle of direct action step by step, and the electromagnetic valve can be easily pulled open in the high-pressure pipeline; when the electromagnetic valve is closed, the handle rod does not move, the locking force of the handle rod seal by medium pressure under high pressure does not influence the closing function of the electromagnetic valve, and the closing is reliable and stable.

Description

High-pressure normally-closed emergency cut-off electromagnetic valve

Technical Field

The utility model relates to an automatic control pipeline is with promptly cutting off the solenoid valve, concretely relates to promptly cut off solenoid valve that is arranged in pipeline high pressure heavy-calibre.

Background

The existing emergency cut-off solenoid valve is generally of a direct-acting type, a handle and a pull rod are connected with a piston, the outer seal is sealed on the pull rod, when the valve is opened, the pull rod is directly pulled to move upwards, then a movable iron core is clamped to stop, and the valve is opened. However, when the pipeline medium pressure exceeds 0.6MPa, the caliber of the valve is larger than DN25, the valve is difficult to be pulled open by human power. Secondly, after the electromagnetic valve is opened, when the electromagnetic valve needs to be closed, the piston is pressed by spring force to connect the handle rod to move to close, but when the electromagnetic valve is under high pressure, the pressure in the valve generates an external impact force on the sealing of the handle rod, the higher the pressure is, the tighter the sealing ring locks the handle rod, the spring force cannot overcome the locking force of the sealing ring on the handle rod, and the phenomenon that the electromagnetic valve cannot be closed is easily caused when the pressure is high.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings, the present invention provides a high-pressure normally closed emergency cut-off solenoid valve, which adopts the principle of direct action step by step, and a large-diameter emergency cut-off solenoid valve used in a high-pressure pipeline can easily open the solenoid valve; when the electromagnetic valve is closed, the handle rod does not move, the locking force of the handle rod seal by medium pressure under high pressure does not influence the closing function of the electromagnetic valve, and the closing is reliable and stable.

In order to achieve the above purpose, the utility model provides a technical scheme is:

a high-pressure normally-closed emergency cut-off electromagnetic valve comprises a valve body, a piston, a plug seat, a pull rod mechanism, a non-magnetic pipe, a movable iron core and a coil;

the valve body is internally provided with an air nozzle, a valve cavity communicated with the air nozzle, an inlet and an outlet;

the piston is arranged in the valve cavity and positioned at the air nozzle, the piston comprises a main body, a piston rod, a piston frame and a connecting nut, the piston rod is fixed below the main body, the piston frame is fixed in the middle of the main body, a throttling hole is formed in one side of the piston frame in a penetrating mode, a pilot hole is formed in the main body in a penetrating mode from top to bottom and from left, and the connecting nut is fixed at the upper end of the main body;

the plug seat is movably arranged on the connecting nut and is positioned above the pilot hole;

the lower end of the non-magnetic pipe is fixedly connected with the valve body, the movable iron core is movably arranged in the non-magnetic pipe, the lower end of the movable iron core is fixedly connected with the upper end of the plug head seat, and the coil is fixedly arranged on the non-magnetic pipe;

the pull rod mechanism is movably arranged on the non-magnetic pipe, and the lower end of the pull rod mechanism is connected with the plug seat through a movable iron core spring.

Preferably, the upper end of the valve body is fixedly provided with a middle cover through a bolt, the middle part of the middle cover penetrates through the middle cover and is provided with a mounting part protruding upwards, and the mounting part is fixedly connected with the lower end of the non-magnetic pipe.

Preferably, the joints of the middle cover and the valve body, the joints of the mounting part and the non-magnetic pipe are provided with sealing rings.

Preferably, the bottom in the valve body is provided with a limiting sleeve, the piston rod can be movably arranged in the limiting sleeve up and down, and the limiting effect can be achieved when the piston moves up and down, so that the piston rod is prevented from swinging.

Preferably, the outer side edge of the piston frame of the piston is provided with an installation platform, an installation groove is formed in the installation platform, a piston ring is installed in the installation groove, and the outer side of the piston ring abuts against the inner wall of the valve cavity.

Preferably, the lower end of the connecting nut is connected to the upper end of the main body through threads, the upper end of the connecting nut is provided with a through hole in a penetrating mode, one side of the connecting nut is provided with a pressure relief hole in a penetrating mode, the lower end of the plug seat penetrates through the through hole in a movable connection mode, the bottom end of the plug seat is provided with a clamping portion in an outwards protruding mode, and the plug seat can be clamped on the inner wall of the connecting nut after moving upwards for a certain distance.

Preferably, a plug is embedded in the end part of the lower end of the plug seat, is made of a soft rubber material and protrudes out of the lower surface of the plug, and can effectively plug the pilot hole.

Preferably, the pull rod mechanism comprises a handle rod, a handle rod spring and a handle, the handle is arranged at the upper end of the handle rod, the handle rod penetrates through the non-magnetic pipe and the movable iron core and is fixedly connected with the upper end of the movable iron core spring, the handle rod spring sleeve is arranged at the lower end and the upper end of the handle rod and is abutted to the non-magnetic pipe, and the lower end is abutted to the boss arranged at the lower end of the handle rod.

Preferably, the lower end of the non-magnetic pipe is provided with a first movable cavity, and the upper end of the non-magnetic pipe is sequentially provided with a first through hole, a second through hole and a third through hole which are different in aperture in a penetrating manner. The movable iron core is movably arranged in the first movable cavity, a second movable cavity is formed in the movable iron core in a penetrating mode, the upper end of the plug seat is fixedly arranged at the lower end of the second movable cavity, the handle rod penetrates through the third through hole, the second through hole, the first through hole and the second movable cavity, and the handle rod is clamped at the upper end of the second movable cavity through a boss at the lower end of the handle rod. The movable iron core spring is arranged in the second movable cavity, the upper end and the lower end of the movable iron core spring are fixedly connected with the upper ends of the handle rod and the plug seat respectively, the lower end of the handle rod spring abuts against a boss at the lower end of the handle rod, the upper end of the handle rod spring abuts against the top wall of the first through hole, and the second through hole and the third through hole are provided with a sealing ring and a sealing ring nut respectively.

Preferably, a limiting block is arranged between the handle and the seal ring nut.

The utility model has the advantages that:

1. the utility model adopts the stepped direct-acting principle of the plug seat of the electromagnetic valve and the pull rod mechanism, the piston is provided with the throttling hole and the pilot hole which are communicated with the valve cavity, the inlet and the outlet, the pilot hole is opened firstly when the piston is opened, the medium-assisted piston is opened by the pressure relief of the pressure in the valve cavity and the upper and lower pressure difference principle, so the valve can be opened easily when the pressure is high, and the phenomenon that the existing electromagnetic valve can not be pulled open by manpower when the pressure is high is avoided; and simultaneously, the utility model discloses when the valve is closed in the coil outage, handle and handle bar are unmovable, only inside movable core leans on movable core spring to promote the plug seat and close the pilot hole earlier after, the medium increases through the orifice inflow back pressure in the valve pocket, the piston closes the shutoff gas with the help of medium pressure and movable core spring elastic force and chews, handle bar is motionless when the solenoid valve is closed, so the locking force of sealing washer to the handle bar does not influence the action of closing of solenoid valve when the medium is high pressure, it is more reliable when the solenoid valve is closed, it is more stable.

2. The utility model discloses close the circular telegram of current emergency cut-off solenoid valve and change into outage closed structure, coil power is little, and long-time circular telegram keeps the open mode, closes after the outage. The power supply can be turned off under the condition that no power supply or people cannot enter the emergency.

The present invention will be further explained with reference to the drawings and the embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a high-pressure normally closed emergency cut-off solenoid valve of the present invention;

FIG. 2 is an enlarged view of the piston of FIG. 1;

fig. 3 is a schematic view of the structure of fig. 1 without the magnet tube.

The reference numerals in the drawings are explained below.

The valve comprises a valve body 1, an air nozzle 1a, a valve cavity 1b, an inlet 1c, an outlet 1d, a middle cover 1e, an installation part 1f, a limiting sleeve 1g, a piston 2, a main body 2a, a piston rod 2b, a piston frame 2c, an installation table 21c, an installation groove 22c, a piston ring 23c, a connecting nut 2d, a through hole 21d, a pressure relief hole 22d, an orifice 2e, a pilot hole 2f, a plug seat 3, a clamping part 3a, a plug 3b, a pull rod mechanism 4, a handle rod 4a, a handle rod spring 4b, a handle 4c, a boss 4d, a non-magnetic pipe 5, a first movable cavity 5a, a first through hole 5b, a second through hole 5c, a third through hole 5d, a movable iron core 6, a movable iron core spring 6a, a second movable cavity 6b, a coil 7, a sealing ring 8, a sealing ring nut.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1, 2 and 3, a high-pressure normally-closed emergency cut-off solenoid valve includes a valve body 1, a piston 2, a plug seat 3, a pull rod mechanism 4, a non-magnetic pipe 5, a movable iron core 6 and a coil 7. An air nozzle 1a, a valve cavity 1b communicated with the air nozzle 1a, an inlet 1c and an outlet 1d are arranged in the valve body 1. The piston 2 is arranged in the valve cavity 1b and is positioned at the air nozzle 1 a. The piston 2 comprises a main body 2a, a piston rod 2b, a piston frame 2c and a connecting nut 2d, wherein the piston rod 2b is fixed below the main body 2a, and the piston frame 2c is fixed in the middle of the main body 2 a. An orifice 2e is formed through one side of the piston frame 2c, a pilot hole 2f is formed through the main body 2a from top to bottom and to the left, and the connecting nut 2d is fixed to the upper end of the main body 2 a. The plug seat 3 is movably arranged on the connecting nut 2d and is positioned above the pilot hole 2f, and is used for plugging the pilot hole 2f to adjust and control the pressure in the valve cavity 1b, so that the pressure difference between the upper end and the lower end of the valve cavity 1b is realized, and the up-and-down movement adjustment of the piston 2 is facilitated.

The lower end of the non-magnetic pipe 5 is fixedly connected with the valve body 1, the movable iron core 6 is movably arranged inside the non-magnetic pipe 5, the lower end of the movable iron core 6 is fixedly connected with the upper end of the plug head seat 3, and the coil 7 is fixedly arranged on the non-magnetic pipe 5. The pull rod mechanism 4 is movably arranged on the non-magnetic pipe 5, and the lower end of the pull rod mechanism is connected with the plug head seat 3 through a movable iron core spring 6 a.

The upper end of the valve body 1 is fixedly provided with a middle cover 1e through a bolt, the middle part of the middle cover 1e penetrates through and is provided with a mounting part 1f in an upward protruding mode, and the mounting part 1f is fixedly connected with the lower end of the non-magnetic pipe 5. Well lid 1e with the junction of valve body 1, installation department 1f with the junction of no magnet pipe 5 all is provided with sealing washer 8, can prevent effectively that outside impurity from entering into the inside influence medium quality of valve body 1.

In this embodiment, the bottom in the valve body 1 is equipped with stop collar 1g, but piston rod 2b from top to bottom activity install in stop collar 1g, reciprocate the in-process when piston 2 can play spacing effect, prevent that piston rod 2b from swinging.

Furthermore, the outer edge of the piston frame 2c of the piston 2 is provided with an installation platform 21c, and the installation platform 21c is internally provided with an installation groove 22c, the installation groove 22c is internally provided with a piston ring 23c, and the outer side of the piston ring 23c is abutted against the inner wall of the valve cavity 1 b.

Further, the lower end of the connecting nut 2d is connected to the upper end of the main body 2a through threads, the upper end of the connecting nut 2d is provided with a through hole 21d in a penetrating mode, one side of the connecting nut 2d is provided with a pressure relief hole 22d in a penetrating mode, the lower end of the plug seat 3 penetrates through the through hole 21d and is movably connected with the lower end of the plug seat 3, a clamping portion 3a is arranged at the bottom end of the plug seat 3 in an outwards protruding mode, and the plug seat 3 can be clamped on the inner wall of the connecting nut 2d after a certain distance when moving upwards.

In this embodiment, a plug 3b is embedded in the lower end of the plug seat 3, and the plug 3b is made of a soft rubber material and protrudes out of the lower surface of the plug 3b, so as to effectively plug the pilot hole 2 f.

Specifically, the pull rod mechanism 4 comprises a handle rod 4a, a handle rod spring 4b and a handle 4c, the handle 4c is arranged at the upper end of the handle rod 4a, the handle rod 4a penetrates through the non-magnetic tube 5 and the movable iron core 6 and is fixedly connected with the upper end of the movable iron core spring 6a, the handle rod spring 4b is sleeved at the lower end and the upper end of the handle rod 4a and abuts against the non-magnetic tube 5, and the lower end abuts against a boss 4d arranged at the lower end of the handle rod 4 a.

Further, the lower end of the non-magnetic pipe 5 is provided with a first movable cavity 5a, and the upper end of the non-magnetic pipe is sequentially provided with a first through hole 5b, a second through hole 5c and a third through hole 5d which have different apertures. The movable iron core 6 is movably arranged in the first movable cavity 5a, the movable iron core 6 is internally provided with a second movable cavity 6b in a penetrating way, and the upper end of the plug seat 3 is fixedly arranged at the lower end of the second movable cavity 6 b. The handle rod 4a passes through the third through hole 5d, the second through hole 5c, the first through hole 5b and the second movable cavity 6b, and is clamped at the upper end of the second movable cavity 6b through a boss 4d at the lower end of the handle rod 4 a. The movable iron core spring 6a is arranged in the second movable cavity 6b, and the upper end and the lower end of the movable iron core spring are fixedly connected with the upper ends of the handle rod 4a and the plug seat 3 respectively. The lower end of the handle rod spring 4b abuts against the boss 4d at the lower end of the handle rod 4a, the upper end of the handle rod spring abuts against the top wall of the first through hole 5b, and the second through hole 5c and the third through hole 5d are respectively provided with a sealing ring 8 and a sealing ring nut 9.

In this embodiment, a limiting block 10 is arranged between the handle 4c and the seal ring nut 9, and plays a limiting role after the handle 4c is pulled and then is reset through the elastic force of the handle rod spring 4 b.

The utility model discloses a theory of operation:

if the electromagnetic valve is opened in the initial state, when the electromagnetic valve needs to be closed in an emergency, the coil 7 is powered off, the magnetic force between the movable iron core 6 and the non-magnetic pipe 5 is disconnected, the movable iron core 6 pushes the plug seat 3 to move downwards by the elastic force of the movable iron core spring 6a until the pilot hole 2f is closed, the medium flows through the orifice 2e into the valve cavity 1b, the valve cavity 1b is pressurized, and the piston 2 moves downwards to close the air nozzle 1a by the elastic force of the movable iron core spring 6a and the gradually increased pressure of the medium until the electromagnetic valve is completely closed. The set of action handle 4c and handle lever 4a do not act and do not need to overcome the high pressure medium by manpower to complete the closing.

When the electromagnetic valve needs to be opened, the coil 7 is electrified, the handle 4c is pulled upwards to drive the handle rod 4a to compress the handle rod spring 4b to move upwards, the movable iron core 6 and the plug seat 3 are driven to move upwards, the movable iron core spring 6a is stretched, the plug seat 3 leaves the pilot hole 2f, the pilot hole 2f is opened, a medium in the valve cavity 1b flows out through the pressure relief hole 22d and the pilot hole 2f to complete pressure relief in the valve cavity 1b, and the pressure in the valve cavity 1b is gradually reduced. The handle 4c is continuously pulled until the piston 2 moves upwards to the highest position, the movable iron core 6 and the non-magnetic pipe 5 are mutually attracted and kept by the magnetic force generated by electrifying the coil 7 at the moment, the handle 4c is loosened at the moment, the handle 4c and the handle rod 4a return to the position of the limiting block 10 by the elastic force of the handle rod spring 4b, and the electromagnetic valve finishes the opening action.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. In addition, although specific terms are used herein, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being defined by the following claims and their equivalents.

Claims

1. A high-pressure normally closed emergency cut-off solenoid valve is characterized in that: the valve comprises a valve body (1), a piston (2), a plug seat (3), a pull rod mechanism (4), a non-magnetic pipe (5), a movable iron core (6) and a coil (7);

an air nozzle (1a), a valve cavity (1b) communicated with the air nozzle (1a), an inlet (1c) and an outlet (1d) are arranged in the valve body (1);

the piston (2) is arranged in the valve cavity (1b) and is positioned at the air nozzle (1a), the piston (2) comprises a main body (2a), a piston rod (2b), a piston frame (2c) and a connecting nut (2d), the piston rod (2b) is fixed below the main body (2a), the piston frame (2c) is fixed in the middle of the main body (2a), a throttling hole (2e) is formed in one side of the piston frame (2c) in a penetrating mode, a pilot hole (2f) is formed in the main body (2a) in a penetrating mode from top to bottom to left, and the connecting nut (2d) is fixed at the upper end of the main body (2 a);

the plug seat (3) is movably arranged on the connecting nut (2d) and is positioned above the pilot hole (2 f);

the lower end of the non-magnetic pipe (5) is fixedly connected with the valve body (1), the movable iron core (6) is movably arranged in the non-magnetic pipe (5), the lower end of the movable iron core (6) is fixedly connected with the upper end of the plug seat (3), and the coil (7) is fixedly arranged on the non-magnetic pipe (5);

the pull rod mechanism (4) is movably arranged on the non-magnetic pipe (5), and the lower end of the pull rod mechanism is connected with the plug head seat (3) through a movable iron core spring (6 a).

2. A high pressure normally closed emergency shut off solenoid valve as claimed in claim 1 wherein: the upper end of the valve body (1) is fixedly provided with a middle cover (1e) through a bolt, the middle of the middle cover (1e) penetrates through and is provided with a mounting part (1f) in an upward protruding mode, and the mounting part (1f) is fixedly connected with the lower end of the non-magnetic pipe (5).

3. A high pressure normally closed emergency shut off solenoid valve as claimed in claim 2 wherein: the middle cover (1e) is connected with the valve body (1), the mounting part (1f) is connected with the non-magnetic pipe (5) and is provided with a sealing ring (8).

4. A high pressure normally closed emergency shut off solenoid valve as claimed in claim 1 wherein: the bottom in the valve body (1) is equipped with stop collar (1g), piston rod (2b) can move about from top to bottom install in stop collar (1g), reciprocate the in-process when piston (2) and can play spacing effect, prevent that piston rod (2b) from swinging.

5. A high pressure normally closed emergency shut off solenoid valve as claimed in claim 1 wherein: the outer side edge of a piston frame (2c) of the piston (2) is provided with an installation platform (21c), an installation groove (22c) is formed in the installation platform (21c), a piston ring (23c) is installed in the installation groove (22c), and the outer side of the piston ring (23c) abuts against the inner wall of the valve cavity (1 b).

6. A high pressure normally closed emergency shut off solenoid valve as claimed in claim 1 wherein: the lower extreme of coupling nut (2d) passes through threaded connection in the upper end of main part (2a), and the upper end of coupling nut (2d) runs through and has seted up through-hole (21d), and one side of coupling nut (2d) runs through inside and has seted up pressure release hole (22d), the lower extreme of plug head seat (3) passes through-hole (21d) swing joint, and the bottom of plug head seat (3) is equipped with card portion of holding (3a) to the evagination, can hold after certain distance when plug head seat (3) upward movement in on the inner wall of coupling nut (2 d).

7. A high pressure normally closed emergency shut off solenoid valve as claimed in claim 6 wherein: the lower end part of the plug seat (3) is embedded with a plug (3b), and the plug (3b) is made of soft rubber materials and protrudes out of the lower surface of the plug (3b), so that the plugging of the pilot hole (2f) can be effectively completed.

8. A high pressure normally closed emergency shut off solenoid valve as claimed in claim 1 wherein: pull rod mechanism (4) include handle bar (4a), handle bar spring (4b) and handle (4c), install in handle bar (4a) upper end handle bar (4c), handle bar (4a) pass no magnet tube (5) with move iron core (6) with move iron core spring (6a) upper end fixed connection, handle bar spring (4b) cover is located the lower extreme and the upper end of handle bar (4a) support and push up in no magnet tube (5), the lower extreme support and push up in on boss (4d) that handle bar (4a) lower extreme set up.

9. A high pressure normally closed slam shut solenoid valve as defined in claim 8 wherein: the lower end of the non-magnetic pipe (5) is provided with a first movable cavity (5a), the upper end of the non-magnetic pipe (5) is sequentially provided with a first through hole (5b), a second through hole (5c) and a third through hole (5d) in a penetrating manner, the movable iron core (6) is movably arranged in the first movable cavity (5a), the movable iron core (6) is internally provided with a second movable cavity (6b) in a penetrating manner, the upper end of the plugging seat (3) is arranged at the lower end of the second movable cavity (6b) and fixed, the handle rod (4a) penetrates through the third through hole (5d), the second through hole (5c), the first through hole (5b) and the second movable cavity (6b) and is clamped at the upper end of the second movable cavity (6b) through a boss (4d) at the lower end of the handle rod (4a), the movable iron core spring (6a) is arranged in the second movable cavity (6b), and the upper end and the lower end of the movable iron core spring are respectively and fixedly connected with the upper end, the lower end of the handle rod spring (4b) abuts against a boss (4d) at the lower end of the handle rod (4a), the upper end of the handle rod spring abuts against the top wall of the first through hole (5b), and the second through hole (5c) and the third through hole (5d) are respectively provided with a sealing ring (8) and a sealing ring nut (9).

10. A high pressure normally closed slam shut solenoid valve as defined in claim 9 wherein: and a limiting block (10) is arranged between the handle (4c) and the sealing ring nut (9).