CN209943645U

CN209943645U - Electromagnetic valve

Info

Publication number: CN209943645U
Application number: CN201920489314.0U
Authority: CN
Inventors: 柳锦; 吴鑫
Original assignee: SHENZHEN KEYTO FLUID CONTROL CO Ltd
Current assignee: Shenzhen Kentuo Fluid Technology Co ltd
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2020-01-14
Anticipated expiration: 2029-04-11

Abstract

The utility model relates to a fluid control technical field discloses a solenoid valve. The solenoid valve includes valve body and response subassembly, is equipped with sprue, side runner in the valve body and with the detection runner of sprue UNICOM, the other end that detects the runner is equipped with the response subassembly, when the pressure that the response subassembly detected was greater than the setting value, sprue and side runner UNICOM, the fluid flows the valve body through the side runner to realize the self-protection of solenoid valve. The electromagnetic valve does not need to be provided with a pressure relief channel in the valve body independently, so that the processing difficulty of the valve body is reduced; meanwhile, the sensing element is not provided with a spring, so that the sensing element cannot lose efficacy even being used for a long time, and the monitoring precision can be ensured for a long time.

Description

Electromagnetic valve

Technical Field

The utility model belongs to the technical field of fluid control technique and specifically relates to a solenoid valve is related to.

Background

Solenoid valves are electromagnetically controlled industrial devices, are basic elements of automation for controlling fluids, and are not limited to hydraulic or pneumatic. Solenoid valves are used in industrial control systems to regulate the direction, flow, velocity and other parameters of a fluid, with different solenoid valves acting at different locations in the control system.

In the use process of the solenoid valve, if the fluid pressure in the solenoid valve is too high, the solenoid valve may be damaged, but at present, the solenoid valve with a safety protection function is still very rare in the market.

Some solenoid valve products have adopted mechanical pressure relief structure to realize safety protection, and this kind of solenoid valve includes pressure release passageway and mechanical pressure relief subassembly. This mechanical pressure release subassembly relies on the sealing member shutoff pressure release runner that is supported by the spring, and the spring can lead to fatigue because of frequent deformation in the use, influences the precision, and this solenoid valve still need set up a pressure release passageway in addition on the valve body to the preparation degree of difficulty of solenoid valve has been increased.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a solenoid valve to solve the technical problem that the precision becomes increasingly after the solenoid valve uses for a long time.

The utility model provides a technical scheme that its technical problem adopted is:

a solenoid valve comprises a valve body and an induction assembly, wherein a main flow channel, a side flow channel and a detection flow channel are arranged in the valve body, one end of the detection flow channel is communicated with the main flow channel, and the induction assembly is arranged at the other end of the detection flow channel; when the pressure detected by the sensing assembly is greater than a set value, the main flow channel is communicated with the side flow channel.

As a further improvement of the technical scheme, the sensing assembly comprises a membrane and a pressure sensor, the membrane is fixed relative to the valve body and seals the detection flow channel, and the membrane transmits pressure to the pressure sensor through deformation.

As a further improvement of the technical scheme, the sensing assembly further comprises a framework, one end of the framework is fixedly connected with the diaphragm, and the other end of the framework is abutted against the pressure sensor.

As a further improvement of the technical scheme, the sensing assembly further comprises a limiting column fixedly connected with the valve body, the limiting column is provided with a fixing groove facing the detection flow channel, and one end of the pressure sensor, which is far away from the detection flow channel, is abutted against the bottom of the fixing groove.

As a further improvement of the technical scheme, the limiting column further comprises a gasket, and the gasket is embedded between the diaphragm and the end face of the limiting column.

As a further improvement of the technical scheme, the limiting column is in threaded connection with the valve body.

As a further improvement of the technical scheme, the electromagnetic valve is a direct-acting electromagnetic valve.

The beneficial effects of this technical scheme are:

this solenoid valve includes valve body and response subassembly, is equipped with sprue, side runner in the valve body and with the detection runner of sprue UNICOM, the one end that the sprue was kept away from to the detection runner is equipped with this response subassembly, this response subassembly can be with detecting fluidic pressure. When the detection value is larger than the set value, the main flow channel is communicated with the side flow channel, and the fluid flows out of the electromagnetic valve from the side flow channel.

Because the electromagnetic valve does not need to be provided with a pressure relief channel in the valve body, the processing difficulty of the valve body is reduced; meanwhile, because no spring is arranged in the induction assembly, the induction assembly cannot lose efficacy even being used for a long time, and the monitoring precision can be ensured for a long time.

Drawings

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

FIG. 1 is a perspective view of one direction of one embodiment of a solenoid valve.

FIG. 2 is a perspective view of another orientation of an embodiment of a solenoid valve.

FIG. 3 is a schematic view of a cross-section through a primary flow passage of one embodiment of a solenoid valve.

FIG. 4 is a cross-sectional view through a side flow passage of one embodiment of a solenoid valve.

Fig. 5 is a partially enlarged schematic view of a in fig. 3.

Detailed Description

The conception, specific structure and technical effects of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, so as to fully understand the objects, aspects and effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the description of the upper, lower, left, right, front, rear, etc. used in the present invention is only relative to the mutual position relationship of the components of the present invention in the drawings.

Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.

Referring to fig. 1 and 2, there are shown schematic perspective views of two directions of a solenoid valve 100 with an electric control protection function. As shown, the solenoid valve 100 includes a valve body 110, a solenoid assembly 120, and an induction assembly 130.

Referring to fig. 3 to 5, there are shown a sectional view of the solenoid valve through the main flow passage in a front view direction, a sectional view of the solenoid valve through the side flow passage in a front view direction, and a partially enlarged view at a. The valve body 110 has a rectangular parallelepiped shape as a whole, and a main flow passage 111, a side flow passage 112, and a detection flow passage 113 are provided therein.

Specifically, the main flow passage 111 integrally penetrates the valve body 110, and the solenoid assembly 120 is disposed at the top of the valve body 110 and seals the top of the main flow passage 111. The side channel 112 extends from the left side of the valve body 112 to the top of the valve body 110, and the solenoid assembly 120 also seals the top of the side channel 112. The detection flow passage 113 communicates with the main flow passage 111 and extends to a right side portion of the valve body 110. It should be understood that the ends of the main flow channel 111, the side flow channels 112 and the detection flow channel 113 far away from the electromagnetic assembly 120 are not necessarily disposed at different sides of the valve body 110, and the ends of two of the flow channels far away from the electromagnetic assembly may be disposed at the same side, or the ends of all the flow channels far away from the electromagnetic assembly may be disposed at the same side.

The electromagnetic assembly 120 includes a coil 121, a plunger 122, a seal 123, a stopper 124, and a housing 125. The housing 125 is fixed to the top of the valve body 110, and a stopper 124 extending toward one side of the valve body 110 is disposed on an inner top wall of the housing 125.

The sealing member 123 seals the end of the main flow channel 111 and the end of the side flow channel 112, and the plunger 122 is fixedly connected to the sealing member 123 and disposed below the stopper 124. A spring is provided between the plunger 122 and the stopper 124, and preferably, the spring is compressed to press the sealing member 123 against the valve body 110 and seal the ends of the main flow passage 111 and the side flow passage 112.

The valve of the solenoid valve 100 is normally closed, when the coil 121 is energized, a magnetic field is generated, the plunger 122 moves upward under the action of the magnetic field, the sealing member 123 is disengaged from the valve body 110, i.e., the valve is opened, and the fluid in the main flow passage 111 can flow into the side flow passage 112. When the coil 121 is de-energized, the movable iron core 122 is reset under the action of gravity and the spring, the valve is closed, and the main flow passage 111 and the side flow passages 112 are sealed.

The right side of the valve body 110 is provided with a groove communicated with the detection flow channel 113, and the sensing assembly 130 is fixedly arranged in the groove. Specifically, the sensing assembly 130 includes a diaphragm 131, a frame 132, a pressure sensor 133, a restraining post 134, and a gasket 135.

The limiting column 134 is connected with the valve body 110 through threads, a fixing groove coaxial with the detection flow channel 113 is formed in one end, facing the detection flow channel 113, of the limiting column 134, the framework 132 and the pressure sensor 133 are arranged on the fixing groove, and one end, far away from the detection flow channel 113, of the pressure sensor 133 is abutted against the fixing groove.

The diaphragm 131 seals the detection flow channel 113, and one end of the frame 132 is fixedly connected to the diaphragm 131, and the other end abuts against the pressure sensor 133. In order to seal the detection flow channel 113 with the membrane 131 without being damaged by the fluid pressure, the membrane 131 should have sufficient strength; meanwhile, the diaphragm is required to transmit the deformation to the framework 132, and the diaphragm should have proper elasticity; in summary, the material of the membrane 131 is preferably rubber or plastic.

The gasket 135 is inserted between the gap between the diaphragm 131 and the stopper 134 so that the diaphragm 131 is tightly pressed against the groove of the valve body, thereby sealing the detection flow path 113.

When fluid exists in the main flow passage and the detection flow passage, the diaphragm 131 deforms under the pressure of the fluid, and the deformation of the diaphragm 131 is transmitted to the pressure sensor 133 through the framework 132, so that the sensor outputs a pressure signal.

The utility model discloses can be applied to the automatically controlled protection system of a solenoid valve. The electronic control protection system of the electromagnetic valve comprises a control unit and the electromagnetic valve. The control unit is simultaneously electrically connected with the electromagnetic assembly and the induction assembly.

The electric control protection method of the electromagnetic valve is briefly described as follows:

when fluid flows in the main flow channel and the detection flow channel, the pressure sensor transmits the detected pressure data to the control unit, when the detected data is larger than a set value of the control unit, the control unit controls the electromagnetic valve (actually, an electromagnetic assembly) to open the valve, the main flow channel is communicated with the side flow channel, and then the fluid in the main flow channel flows into the side flow channel firstly and then flows out of the valve body, so that the pressure relief process is realized.

In one example, the pressure setting value is 10Kg, when the pressure in the main flow channel exceeds 10Kg, the sensing assembly transmits the detected pressure value to the control unit, the control unit sends out an instruction to electrify the coil, the valve is opened, and then the fluid in the main flow channel is discharged to the outside of the electromagnetic valve, so that the pressure relief process is realized. When the pressure in the main flow passage is lower than a set value, the control unit sends out an instruction for powering off the coil, and the valve is closed.

The electromagnetic valve electric control protection system can monitor the pressure of a flow passage in the valve body, and open the electromagnetic valve to release pressure when the flow passage is over-pressurized, so that the safety protection function of the electromagnetic valve is realized.

Because the electromagnetic valve protection system realizes the overvoltage protection of the electromagnetic valve by monitoring the pressure in the electromagnetic valve and controlling the opening and closing of the electromagnetic valve according to the monitoring value, a pressure relief channel does not need to be independently processed in the valve body, and the processing difficulty of the valve body is reduced; meanwhile, because no spring is arranged in the induction assembly, the induction assembly cannot lose efficacy even being used for a long time, and the monitoring precision can be ensured for a long time.

It should be appreciated that the solenoid valve may be any type of solenoid valve, such as a direct acting solenoid valve, a step direct acting solenoid valve, or a pilot operated solenoid valve.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A solenoid valve is characterized by comprising a valve body and a sensing assembly, wherein a main flow channel, a side flow channel and a detection flow channel are arranged in the valve body, one end of the detection flow channel is communicated with the main flow channel, and the sensing assembly is arranged at the other end of the detection flow channel; when the pressure detected by the sensing assembly is greater than a set value, the main flow channel is communicated with the side flow channel.

2. The solenoid valve of claim 1, wherein the sensing assembly comprises a diaphragm and a pressure sensor, the diaphragm is disposed at an end of the detection flow channel away from the main flow channel, and the diaphragm transmits the pressure to the pressure sensor through deformation.

3. The electromagnetic valve according to claim 2, wherein the sensing assembly further comprises a frame, one end of the frame is fixedly connected with the diaphragm, and the other end of the frame abuts against the pressure sensor.

4. The electromagnetic valve according to claim 2 or 3, wherein the sensing assembly further comprises a limiting post fixedly connected with the valve body, the limiting post is provided with a fixing groove facing the detection flow channel, and one end of the pressure sensor, which is far away from the detection flow channel, abuts against the bottom of the fixing groove.

5. The solenoid valve of claim 4, further comprising a spacer interposed between the diaphragm and the end surface of the retaining post.

6. The solenoid valve of claim 4, wherein the retaining post is threadably connected to the valve body.

7. The solenoid valve of claim 1 wherein said solenoid valve is a direct acting solenoid valve.