CN220505942U

CN220505942U - Proportional control valve

Info

Publication number: CN220505942U
Application number: CN202321551381.3U
Authority: CN
Inventors: 大野创
Original assignee: Takasago Electric Suzhou Co Ltd
Current assignee: Takasago Electric Suzhou Co Ltd
Priority date: 2023-06-16
Filing date: 2023-06-16
Publication date: 2024-02-20
Anticipated expiration: 2033-06-16

Abstract

The utility model discloses a proportional control valve, which comprises a valve body and an electromagnetic driving piece, wherein the lower end of the valve body is provided with an inlet and an outlet, and an opening and closing assembly which is driven by the electromagnetic driving part to open and close the inlet and the outlet is arranged in the valve body. The opening and closing assembly comprises a movable iron core, a plugging assembly and a diaphragm assembly, wherein the movable iron core can be driven by an electromagnetic driving part to lift, the diaphragm assembly divides a valve body into an upper cavity and a lower cavity, the diaphragm assembly comprises at least two diaphragm bodies which are arranged at intervals from top to bottom, each diaphragm body is sealed and sleeved outside the corresponding plugging assembly, the outer edge of each diaphragm body is in sealing connection with the corresponding valve body, the plugging assembly is fixed at the lower end of the movable iron core and can lift synchronously with the movable iron core, and the part of the plugging assembly, which is positioned in the lower cavity, can be connected with an inlet and an outlet. The diaphragm assembly provides stable guide and support for lifting of the movable iron core, and improves the precision of the proportional control valve.

Description

Proportional control valve

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to a proportional control valve.

Background

The electromagnetic valve uses coil to generate electromagnetic force to drive the isolating diaphragm to move, to open or close the valve, to change the flow direction of fluid. The proportional control valve is a solenoid valve and has a plurality of kinds and wide application. Referring to fig. 1, the conventional proportional control valve comprises a movable iron core capable of moving up and down, wherein the end part of the movable iron core can block or conduct an inlet and an outlet of a valve body, a diaphragm body which is in sealing connection with the valve body is fixed on the movable iron core, and the diaphragm body can seal a cavity communicated with the inlet and the outlet. In the process of moving up and down, the movable iron core may incline to generate folding motion, which affects the precision of the proportional control valve. The friction coefficient of the movable iron core is generally reduced by electroplating, plating, ring mounting and the like on the movable iron core, but the plating and ring mounting modes are worn, so that the performance is reduced along with the increase of the action times, and the position accuracy of the movable iron core is influenced by friction resistance.

Disclosure of Invention

In order to overcome the defects, the utility model aims to provide the proportional control valve which can stably guide and support the lifting of the movable iron core and improve the precision of the proportional control valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the proportional control valve comprises a valve body and an electromagnetic driving part, wherein an inlet and an outlet are arranged at the lower end of the valve body, and an opening and closing assembly which is driven by the electromagnetic driving part to be opened and closed by the electromagnetic driving part is arranged in the valve body. The opening and closing assembly comprises a movable iron core, a plugging assembly and a diaphragm assembly, wherein the movable iron core can be driven by an electromagnetic driving part to lift, the diaphragm assembly divides a valve body into an upper cavity and a lower cavity, the diaphragm assembly comprises at least two diaphragm bodies which are arranged at intervals, each diaphragm body is sealed and sleeved outside the plugging assembly, the outer edge of the diaphragm body is in sealing connection with the valve body, the plugging assembly is fixed at the lower end of the movable iron core and is lifted synchronously with the movable iron core, and the part of the plugging assembly, which is positioned in the lower cavity, can be connected with an inlet and an outlet.

The utility model has the beneficial effects that: the diaphragm body is provided with at least two, and the movable iron core keeps the central position due to the limitation of the two diaphragm bodies, so that the deflection of the movable iron core in the lifting process is reduced, the movable iron core is prevented from being contacted with the valve body, the friction of the movable iron core can be restrained, and the folding motion of the movable iron core is eliminated.

Further, the plugging assembly comprises a connector and a sealing body, wherein the connector is located between the movable iron core and the sealing body, the connector is detachably connected with the movable iron core, and the sealing body is detachably connected with the connector. And a detachable connection mode is adopted, so that the assembly and the replacement are convenient.

Furthermore, two diaphragm bodies are arranged, one diaphragm body is clamped and sealed between the connector and the movable iron core at the center position, and the other diaphragm body is clamped and sealed between the connector and the sealing body at the center position. Therefore, when the connector, the sealing body and the movable iron core are connected, the diaphragm body can be directly clamped, and the processing is convenient.

Further, the inlet and the outlet are directly communicated with the lower cavity, the inlet is positioned at the side edge of the lower cavity, the outlet is positioned at the bottom of the lower cavity, and the electromagnetic driving part is positioned in the upper cavity. The lower end of the sealing body is positioned in the lower cavity, and when the sealing body moves up and down in the lower cavity, the inlet and the outlet are opened and closed, so that the on-off of the proportional control valve is realized.

Further, channels for conducting the upper cavity and the lower cavity are formed in the plugging assembly and the movable iron core. The sealing body bottom receives the ascending power of liquid, and liquid can flow to the diaphragm subassembly top from the passageway, can produce down force to the sealing body through the diaphragm subassembly, and the sealing body receives the power of upper and lower direction like this and offset, smears out the pressure of sealing body to realize efficient proportional control valve.

Further, the channel is arranged at the center of the plugging component and the movable iron core. The liquid in the channel is ensured to provide uniform pressure on the plugging component and the movable iron core in the radial direction.

Further, the connector is in threaded connection with the movable iron core, and the sealing body is in threaded connection with the connector. The lower extreme of movable iron core has offered the screw hole, and the upper end of connector can insert threaded hole and with screw hole threaded connection. The lower extreme of connector has offered the screw hole, and the upper end of seal body can insert threaded hole and with screw hole threaded connection.

Further, the sealing body comprises a sealing part which is lifted in the lower cavity, a sealing gasket made of rubber material is fixed at the lower end of the sealing part, and the sealing gasket can be sealed with the cavity bottom of the lower cavity to seal the outlet. The sealing gasket made of the rubber material has good sealing effect and improves the sealing performance.

Further, the electromagnetic driving part comprises a fixed iron core, a spring and a coil, wherein the fixed iron core is fixed in the upper cavity, the coil is wound outside the fixed iron core, and the spring is arranged between the fixed iron core and the movable iron core. When the coil is electrified, suction force is generated on the fixed iron core, the movable iron core is adsorbed to move upwards, the spring is compressed at the moment, and the inlet and the outlet are communicated. When the coil is de-energized, the spring pushes the moving core downward, at which time the inlet and outlet are disconnected.

Further, a sealing ring sleeved outside the fixed iron core is arranged in the upper cavity. The sealing ring has a sealing effect, seals the upper cavity and the external space, and avoids liquid leakage in the upper cavity.

Drawings

FIG. 1 is a semi-sectional view of a prior art proportional control valve;

FIG. 2 is a cross-sectional view of an embodiment of the present utility model;

fig. 3 is an enlarged view at a in fig. 2.

In the figure:

1. a valve body; 1a, an upper cavity; 1b, lower cavity; 11. an inlet; 12. an outlet; 2. a movable iron core; 3. a diaphragm body; 4. a connector; 5. a sealing body; 6. a channel; 71. fixing an iron core; 72. a spring; 73. a coil; 8. and (3) sealing rings.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

Referring to fig. 2, the proportional control valve of the utility model comprises a valve body 1 and an electromagnetic driving part, wherein an inlet 11 and an outlet 12 are arranged at the lower end of the valve body 1, and an opening and closing assembly which is driven by the electromagnetic driving part to open and close the inlet 11 and the outlet 12 is arranged in the valve body 1. Liquid enters from the inlet 11 and flows out from the outlet 12, and the electromagnetic driving part drives the opening and closing assembly to move so as to control the on-off of the proportional control valve.

Referring to fig. 2 and 3, the opening and closing assembly includes a movable iron core 2, a blocking assembly, and a diaphragm assembly, wherein the movable iron core 2 can be driven by an electromagnetic driving part to lift, and the diaphragm assembly divides the valve body 1 into an upper cavity 1a and a lower cavity 1b. The diaphragm assembly comprises at least two diaphragm bodies 3, the two diaphragm bodies 3 are arranged at intervals up and down, each diaphragm body 3 is in sealing sleeve connection with the outside of the sealing assembly, the outer edge of the diaphragm body 3 is in sealing connection with the valve body 1, the sealing assembly is fixed at the lower end of the movable iron core 2 and is lifted synchronously with the movable iron core 2, and the part of the sealing assembly, which is positioned in the lower cavity 1b, can be connected with the inlet 11 and the outlet 12 to realize the connection and disconnection of the proportional control valve.

In the present application, the diaphragm body 3 is provided with at least two, and the movable iron core 2 maintains a central position due to the limitation of the two diaphragm bodies 3, so that the deflection of the movable iron core 2 in the lifting process is reduced, the contact with the valve body 1 is avoided, the friction of the movable iron core 2 can be restrained, and the folding motion of the movable iron core 2 is eliminated.

In one embodiment, referring to fig. 2 and fig. 3, the plugging assembly includes a connector 4 and a sealing body 5, the connector 4 is located between the movable iron core 2 and the sealing body 5, the connector 4 is detachably connected with the movable iron core 2, and the sealing body 5 is detachably connected with the connector 4. The diaphragm body 3 is provided with two, one the central point of diaphragm body 3 presss from both sides tightly and seals between connector 4 and movable iron core 2, and another the central point of diaphragm body 3 presss from both sides tightly and seals between connector 4 and sealing body 5. Therefore, when the connector 4, the sealing body 5 and the movable iron core 2 are connected, the diaphragm body 3 can be directly clamped, and the processing is convenient.

In another embodiment, the plugging assembly only comprises a sealing body 5, one diaphragm body 3 can be clamped between the movable iron core 2 and the sealing body 5, other diaphragm bodies 3 can be directly sleeved outside the sealing body 5, and a groove body embedded by the hollow diaphragm body 3 is formed outside the sealing body 5.

The more the diaphragm body 3 is provided, the better the guiding of the movable iron core 2 is, and the deflection of the movable iron core 2 can be avoided, but the more the diaphragm body 3 is provided, the material can be wasted, and the inconvenience is brought to the processing. Thus, in this embodiment, two diaphragm bodies 3 are used to meet the production requirements.

In one embodiment, the connector 4 is in threaded connection with the movable iron core 2, and the sealing body 5 is in threaded connection with the connector 4. The lower extreme of movable iron core 2 has offered the screw hole, and the upper end of connector 4 can insert the screw hole and with screw hole threaded connection. The lower extreme of connector 4 has offered the screw hole, and the upper end of seal body 5 can insert the screw hole and with screw hole threaded connection.

Of course, in some embodiments, the connector, the movable iron core 2, the sealing body 5 and the connector 4 may also be inserted by interference, so long as a convenient installation mode is adopted.

Referring to fig. 2, the inlet 11 and the outlet 12 are directly connected with the lower chamber 1b, the inlet 11 is located at the side of the lower chamber 1b, the outlet 12 is located at the bottom of the lower chamber 1b, and the electromagnetic driving part is located in the upper chamber 1 a. The lower end of the sealing body 5 is positioned in the lower cavity 1b, and when the sealing body 5 moves up and down in the lower cavity 1b, the inlet 11 and the outlet 12 are opened and closed, so that the on-off of the proportional control valve is realized.

In one embodiment, the sealing body 5 comprises a sealing part which is lifted in the lower cavity 1b, and a sealing gasket made of rubber material is fixed at the lower end of the sealing part, and the sealing gasket can be sealed with the cavity bottom of the lower cavity 1b to seal the outlet 12. The sealing gasket made of the rubber material has good sealing effect and improves the sealing performance.

In one embodiment, the plugging assembly and the movable iron core 2 are provided with a channel 6 for communicating the upper cavity 1a and the lower cavity 1b. Namely, the sealing body 5, the connector 4 and the movable iron core 2 are provided with a channel 6. The liquid in the lower chamber 1b flows into the upper chamber 1a through the channel 6 and into the upper chamber 1a above the diaphragm assembly. At this time, the bottom of the sealing body 5 receives upward force of liquid, the liquid flows to the upper part of the diaphragm assembly from the channel 6, downward force is generated on the sealing body 5 through the diaphragm assembly, and thus the upward and downward force received by the sealing body 5 counteracts the pressure of the sealing body 5, so that the efficient proportional control valve is realized.

In one embodiment, the channel 6 is arranged in the central position of the plugging assembly and the movable core 2, i.e. the channel 6 and the plugging assembly, the movable core 2 are coaxially arranged.

Referring to fig. 2, the electromagnetic driving part includes a fixed iron core 71, a spring 72, and a coil 73, the fixed iron core 71 is fixed in the upper cavity 1a, the coil 73 is wound around the fixed iron core 71, and the spring 72 is disposed between the fixed iron core 71 and the movable iron core 2. When the coil 73 is energized, suction force is generated to the fixed iron core 71, the suction moving iron core moves upward, at this time, the spring 72 is compressed, and the inlet 11 and the outlet 12 are conducted. When the coil 73 is de-energized, the spring 72 pushes the moving core downward, at which point the inlet 11 and outlet 12 are disconnected.

Referring to fig. 2, a sealing ring 8 sleeved outside the fixed iron core 71 is arranged in the upper cavity 1 a. The sealing ring 8 has a sealing effect and seals the upper cavity 1a and the external space to avoid liquid leakage in the upper cavity 1 a.

The specific working procedure of this embodiment is as follows: when the liquid needs to flow out, the coil 73 is electrified, the fixed iron core 71 generates suction force, and the movable iron core 2 moves upwards because the fixed iron core 71 is fixed, and the movable iron core 2 can drive the plugging assembly fixedly connected with the movable iron core 2 to move upwards in the upward moving process, so that the inlet 11 and the outlet 12 are communicated. However, when the outflow rate is large, the current of the coil 73 is increased, and the amount of upward movement of the movable core 2 is increased. When the liquid does not need to flow out, the coil 73 is powered off, the fixed iron core 71 has no suction force, and the movable iron core 2 moves downwards to reset under the driving of the spring 72. In this process, owing to be provided with two diaphragm bodies 3, two diaphragm bodies 3 are spacing to the position of shutoff subassembly, and the position that just is spacing to movable iron core 2, avoid movable iron core 2 to produce radial rocking, reduce movable iron core 2 at the skew of lift in-process, avoid producing the contact with valve body 1, can restrain movable iron core 2's friction, eliminate movable iron core 2's slip. Meanwhile, as the sealing component is provided with the channel 6, the bottom of the sealing body 5 is subjected to upward force of liquid, the liquid flows to the upper part of the diaphragm component from the channel 6, downward force is generated on the sealing body 5 through the diaphragm component, and thus the upward and downward force received by the sealing body 5 counteracts the pressure of the sealing body 5, and the high-efficiency proportional control valve is realized.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. The utility model provides a proportional control valve, includes valve body and electromagnetic drive portion, the lower extreme of valve body is provided with import and export, be equipped with in the valve body receive electromagnetic drive portion drive break-make import and export's start-stop subassembly, its characterized in that: the opening and closing assembly comprises a movable iron core, a plugging assembly and a diaphragm assembly, wherein the movable iron core can be driven by an electromagnetic driving part to lift, the diaphragm assembly divides a valve body into an upper cavity and a lower cavity, the diaphragm assembly comprises at least two diaphragm bodies which are arranged at intervals, each diaphragm body is sealed and sleeved outside the plugging assembly, the outer edge of the diaphragm body is in sealing connection with the valve body, the plugging assembly is fixed at the lower end of the movable iron core and is lifted synchronously with the movable iron core, and the part of the plugging assembly, which is positioned in the lower cavity, can be connected with an inlet and an outlet.

2. The proportional control valve of claim 1, wherein: the plugging assembly comprises a connector and a sealing body, wherein the connector is positioned between the movable iron core and the sealing body, the connector is detachably connected with the movable iron core, and the sealing body and the connector are detachably connected.

3. The proportional control valve of claim 2, wherein: the diaphragm body is provided with two, one the central point of diaphragm body presss from both sides tightly and seals between connector and movable iron core, and another the central point of diaphragm body presss from both sides tightly and seals between connector and sealing body.

4. The proportional control valve of claim 1, wherein: the inlet and the outlet are directly communicated with the lower cavity, the inlet is positioned at the side edge of the lower cavity, the outlet is positioned at the bottom of the lower cavity, and the electromagnetic driving part is positioned in the upper cavity.

5. A proportional control valve as claimed in claim 3, wherein: and channels for conducting the upper cavity and the lower cavity are formed in the plugging assembly and the movable iron core.

6. The proportional control valve of claim 5, wherein: the channel is arranged at the center of the plugging component and the movable iron core.

7. The proportional control valve of claim 2, wherein: the connector is in threaded connection with the movable iron core, and the sealing body is in threaded connection with the connector.

8. The proportional control valve of claim 2, wherein: the sealing body comprises a sealing part which is lifted in the lower cavity, the lower end of the sealing part is fixedly provided with a sealing gasket made of rubber material, and the sealing gasket can be sealed with the cavity bottom of the lower cavity to seal the outlet.

9. The proportional control valve of any of claims 1-8, wherein: the electromagnetic driving part comprises a fixed iron core, a spring and a coil, wherein the fixed iron core is fixed in the upper cavity, the coil is wound outside the fixed iron core, and the spring is arranged between the fixed iron core and the movable iron core.

10. The proportional control valve of claim 9, wherein: the upper cavity is internally provided with a sealing ring sleeved outside the fixed iron core.