CN210318742U

CN210318742U - Zero-pressure-difference normally open electromagnetic valve

Info

Publication number: CN210318742U
Application number: CN201921259699.8U
Authority: CN
Inventors: 李瑞荣; 温章; 温美聪; 林伟明
Original assignee: Zhejiang Yongjiu Scientific & Technological Industrial Co ltd
Current assignee: Zhejiang Yongjiu Scientific & Technological Industrial Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-04-14
Anticipated expiration: 2029-08-06

Abstract

The utility model provides a zero pressure difference normally open solenoid valve, which comprises a valve body, the spiral cover, the core stopper, the valve plug, valve rod and electromagnetic drive subassembly, the valve plug wholly becomes half confined barrel-shaped, adopt between spiral cover internal surface and the valve plug surface closely to cooperate and can restrict the valve plug and remove in certain extent and can not take place liquid or gas leakage when making relative movement between spiral cover and the valve plug, the core stopper is fixed and can reciprocate relatively the valve plug on the valve rod and directly or indirectly be equipped with closely the fitting piece between core stopper or valve rod and the valve plug and make core stopper or valve rod can not take place liquid or gas leakage when reciprocating relatively the valve plug, liquid or gas can get into in proper order water conservancy diversion hole and flow out from the valve other end from valve one end when the valve plug bottom is equipped with water conservancy diversion hole with core stopper contact segment's central zone bottom of valve plug and valve plug side, the core stopper is fixed on the valve rod and the valve rod can be.

Description

Zero-pressure-difference normally open electromagnetic valve

Technical Field

The utility model belongs to the valve field, concretely relates to zero-pressure differential normally open solenoid valve.

Background

The valve is a control part in a fluid conveying system and has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like. The valve is used for a fluid control system and has wide application. Many existing valves, such as the shut-off type valves used in water supply pipelines, have difficulty in opening due to the pressure difference between the two sides of the valve in the closed state and the large resistance when the valve is opened. Especially, the electromagnetic valve is generally designed to have larger opening force, a large-power electromagnet needs to be designed, the production cost is greatly increased, the common normally-open electromagnetic valve can be opened only by certain pressure difference, the installation direction, the position and the angle are limited to a certain extent, the sealing performance is poor, and the maintenance is difficult.

Disclosure of Invention

To the above-mentioned prior art, the utility model aims at providing a resistance is little when valve is opened solenoid valve.

The technical scheme of the utility model is realized like this: the utility model provides a zero pressure difference normally open solenoid valve, which comprises a valve body, the spiral cover, the core stopper, the valve plug, valve rod and electromagnetic drive subassembly, the valve plug wholly becomes half confined barrel-shaped, adopt between spiral cover internal surface and the valve plug surface closely to cooperate and can restrict the valve plug and remove in certain extent and can not take place liquid or gas leakage when making relative movement between spiral cover and the valve plug, the core stopper is fixed and can reciprocate relatively the valve plug on the valve rod and directly or indirectly be equipped with closely the fitting piece between core stopper or valve rod and the valve plug and make core stopper or valve rod can not take place liquid or gas leakage when reciprocating relatively the valve plug, liquid or gas can get into in proper order water conservancy diversion hole and flow out from the valve other end from valve one end when the valve plug bottom is equipped with water conservancy diversion hole with core stopper contact segment's central zone bottom of valve plug and valve plug side, the core stopper is fixed on the valve rod and the valve rod can be.

The valve has the advantages that the valve opening force can be reduced, the valve can be conveniently opened, the pilot valve hole is additionally arranged on the valve plug, the valve plug components are ingeniously connected together, the coaxiality is guaranteed, the sealing performance is better, and the valve can be installed at any angle in all directions.

Further, the valve main body is of a stop valve structure, and the structure is convenient for opening the valve.

Furthermore, the sealing ring is arranged below the valve plug, so that the valve plug can be ensured not to directly leak liquid or gas when moving downwards to the position contacting with the valve body, and the sealing performance of the electromagnetic valve can be improved.

Furthermore, a sealing element is arranged between the rotary cover and the valve body, so that the rotary cover and the valve body are directly prevented from liquid or gas leakage, and the assembled valve body is ensured to have better reliability and is convenient to assemble.

Furthermore, a blocking cover is arranged between the valve plug and the core plug so as to ensure that gas or liquid does not leak when the valve plug moves relative to the core plug, and therefore, the valve plug is convenient to assemble and can ensure the sealing property.

Furthermore, the core plug and the valve plug are directly provided with the reset spring, so that the core plug can be separated from the bottom of the valve plug by the spring when no external force acts, and the valve can be ensured to be in an opening state during power failure, so that electric energy can be saved

Further, the bottom of the core plug is provided with a sealing gasket, so that the core plug and the valve plug are better sealed, liquid or gas leakage between the core plug and the valve plug is avoided, and the sealing gasket is fixed by a cylindrical pin, so that the processing cost is low and the reliability is good.

Further, the spiral cover lower extreme can be fixed to the valve body on, the spiral cover upper end is equipped with the pipe, is equipped with in the pipe and moves iron core and quiet iron core, is equipped with the through-hole in the quiet iron core and makes the valve rod can pass the through-hole and move the iron core contact, moves the iron core and receives the electromagnetic force control and can reciprocate in the pipe, and the pipe end is equipped with the end cover and can restricts and move the iron core position and make and move the iron core and can not break away from the pipe, and the installation that can be.

Further, the electromagnetic coil is arranged outside the conduit, so that the movable iron core can move up and down under the control of the electromagnetic coil, and the coil can be purchased independently or assembled after production, so that the overall manufacturing cost is reduced.

The invention has the advantages of simple and compact structure and easy processing; the volume is small, and the assembly is convenient; the coaxiality is high, the guidance quality is good, the sealing performance is good, and the service life is long; the large valve and the small valve are connected together to form a component; when the valve is closed by electrifying, the electromagnetic force can directly act on the valve plug component through the valve rod, the action is reliable, and zero leakage of the valve can be achieved.

Drawings

Fig. 1 is a schematic overall sectional view of a zero-pressure-difference normally open solenoid valve of the present invention;

fig. 2 is a schematic view of a valve core structure of a zero-pressure-difference normally open solenoid valve of the present invention;

fig. 3 is the schematic view of the cover screwing assembly of the zero-pressure-difference normally open solenoid valve of the present invention.

Detailed Description

As required, detailed embodiments of the present invention are disclosed herein, but it is to be understood that the disclosed embodiments are merely exemplary of the invention that may be embodied in various and alternative forms. The figures are not necessarily to scale and certain features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, 2 and 3, a zero pressure difference normally open solenoid valve comprises a valve body 1, a screw cap 2, a core plug 9, a valve plug 10, a valve rod 5 and an electromagnetic driving assembly, wherein the valve plug 10 is integrally formed into a semi-closed barrel shape, a tight fit is adopted between the inner surface of the screw cap 2 and the outer surface of the valve plug 10 and can limit the movement of the valve plug 10 in a certain range, so that no liquid or gas leakage occurs when the screw cap 2 and the valve plug 10 move relatively, the core plug 9 is fixed on the valve rod 5 and can move up and down relative to the valve plug 10, a tight fit piece is directly or indirectly arranged between the core plug 9 or the valve rod 5 and the valve plug 10, so that no liquid or gas leakage occurs when the core plug 9 or the valve rod 5 moves up and down relative to the valve plug 10, a guide hole 7 is arranged in the central region of the contact part between the bottom of the valve plug 10 and the core plug 9, and a guide hole 15 is arranged on the side surface And the core plug 9 is fixed on the valve rod 5, and the valve rod 5 can move upwards or downwards when being electrified or deenergized under the control of an electromagnetic driving component. The valve main body is of a stop valve structure. The sealing ring is arranged below the valve plug 10, so that when the valve plug 10 moves downwards to a position contacting with the valve body 1, the valve plug 10 and the valve body 1 can be ensured not to directly generate liquid or gas leakage. A sealing member 3 is arranged between the screw cap 2 and the valve body 1, so that the screw cap 2 and the valve body 1 are directly prevented from liquid or gas leakage. A stop cap is provided between the valve plug 10 and the plug 9 to ensure that no gas or liquid leaks occur when the valve plug 10 is moved relative to the plug 9. The core plug 9 and the valve plug 10 are directly provided with a return spring 11, so that the core plug 9 can be separated from the bottom of the valve plug 10 by the spring when no external force acts. The bottom of the core plug 9 is provided with a sealing gasket, so that the core plug 9 and the valve plug 10 are better sealed to ensure that no liquid or gas leakage occurs between the core plug 9 and the valve plug 10, and the sealing gasket is fixed by a cylindrical pin. The lower end of the spiral cover 2 can be fixed on the valve body 1, the upper end of the spiral cover 2 is provided with a guide pipe 12, a movable iron core 13 and a static iron core 14 are arranged in the guide pipe 12, a through hole is formed in the static iron core 14, the valve rod 5 can pass through the through hole to be in contact with the movable iron core 13, the movable iron core 13 can move up and down in the guide pipe 12 under the control of electromagnetic force, and the end of the guide pipe 12 is provided with an end cover 8 which can limit the position of the movable iron. The outside of the guide tube 12 is provided with a solenoid coil 6 so that the movable iron core 13 can move up and down under the control of the solenoid coil, and the solenoid coil 6 is fixed on the screw cap 2 by the coil shell 4.

Claims

1. The utility model provides a zero-pressure differential normally open solenoid valve which characterized in that: including valve body (1), spiral cover (2), core stopper (9), valve plug (10), valve rod (5) and electromagnetic drive subassembly, valve plug (10) wholly become semi-closed barrel-shaped, adopt between spiral cover (2) internal surface and valve plug (10) surface closely to cooperate and can restrict valve plug (10) and can not take place liquid or gas leakage when moving relatively between making spiral cover (2) and valve plug (10) in certain extent, core stopper (9) are fixed on valve rod (5) and can reciprocate and core stopper (9) or valve rod (5) and valve plug (10) between direct or indirect be equipped with closely the fitting piece and make core stopper (9) or valve rod (5) can not take place liquid or gas leakage when reciprocating relatively valve plug (10), valve plug (10) bottom and core stopper (9) contact segment's central zone are equipped with valve hole (7) and valve plug (10) side is equipped with water conservancy diversion hole (15) and make core stopper (9) break away from valve plug (10) and do not take place liquid or gas leakage when valve plug ) When the valve is in the central area of the bottom, liquid or gas can sequentially enter the flow guide hole and the flow guide hole from one end of the valve and flow out from the other end of the valve, the core plug (9) is fixed on the valve rod (5), and the valve rod (5) can move upwards or downwards when being controlled by the electromagnetic driving component when being powered on or powered off.

2. The zero-pressure-difference normally open solenoid valve according to claim 1, characterized in that: the valve main body is of a stop valve structure.

3. The zero-pressure-difference normally open solenoid valve according to claim 1, characterized in that: the sealing ring is arranged below the valve plug (10) so that the valve plug (10) can move downwards to a position contacting with the valve body (1) and the valve plug (10) and the valve body (1) can be prevented from directly leaking liquid or gas.

4. The zero-pressure-difference normally open solenoid valve according to claim 1, characterized in that: and a sealing element (3) is arranged between the screw cap (2) and the valve body (1) so that the screw cap (2) and the valve body (1) are directly free from liquid or gas leakage.

5. The zero-pressure-difference normally open solenoid valve according to claim 1, characterized in that: a blocking cover (16) is arranged between the valve plug (10) and the core plug (9) to ensure that gas or liquid does not leak when the valve plug (10) moves relative to the core plug (9).

6. The zero-pressure-difference normally open solenoid valve according to claim 1, characterized in that: the core plug (9) and the valve plug (10) are directly provided with a return spring (11) so that the core plug (9) can be separated from the bottom of the valve plug (10) by the spring when no external force acts.

7. The zero-pressure-difference normally open solenoid valve according to claim 1, characterized in that: the bottom of the core plug (9) is provided with a sealing gasket, so that the core plug (9) and the valve plug (10) are better sealed to ensure that no liquid or gas leakage occurs between the core plug (9) and the valve plug (10), and the sealing gasket is fixed by a cylindrical pin.

8. The zero-pressure-difference normally open solenoid valve according to claim 1, characterized in that: spiral cover (2) lower extreme can be fixed to on valve body (1), spiral cover (2) upper end is equipped with pipe (12), be equipped with in pipe (12) and move iron core (13) and quiet iron core (14), be equipped with the through-hole in quiet iron core (14) and make valve rod (5) can pass the through-hole and move iron core (13) contact, it can reciprocate in pipe (12) to move iron core (13) electromagnetic force control, pipe (12) end is equipped with end cover (8) and can restricts and move iron core (13) position and make and move iron core (13) and can not break away from pipe (12).

9. The zero-pressure-difference normally open solenoid valve according to claim 8, characterized in that: an electromagnetic coil (6) is arranged outside the guide pipe (12) so that the movable iron core (13) can move up and down under the control of the electromagnetic coil, and the electromagnetic coil (6) is fixed on the spiral cover (2) through a coil shell (4).