CN220037459U

CN220037459U - Anti-blocking electromagnetic valve

Info

Publication number: CN220037459U
Application number: CN202321594436.9U
Authority: CN
Inventors: 罗纲
Original assignee: Eger Fluid Technology Zhejiang Co ltd
Current assignee: Eger Fluid Technology Zhejiang Co ltd
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2023-11-17
Anticipated expiration: 2033-06-20

Abstract

The utility model provides an anti-blocking electromagnetic valve, which comprises a valve body with a flow path and an interface, wherein a valve cover with a pressure relief pipe is covered on the interface, an electromagnetic suction mechanism is arranged on the upper part of the valve cover, the periphery of the pressure relief pipe is in sealing sleeve connection with a piston, a spring I is arranged between the piston and the valve cover in a pressing way, a back pressure hole is formed in the piston, the back pressure hole is communicated with the flow path and the pressure relief pipe to form a pressure relief path, and a filter element is blocked between the flow path and the back pressure hole by the piston. According to the utility model, the filter structure is additionally arranged aiming at the small aperture of the back pressure hole at the piston part in the existing high-pressure electromagnetic valve, when the medium is not clean, large-particle impurities are intercepted in advance, so that cleaner liquid flow enters the pilot path, the phenomenon of blocking of the electromagnetic valve can be effectively avoided, the effective circulation after the valve body is opened is ensured, and the service life of the valve body is prolonged. The valve body and the valve cover adopt threaded connection to replace traditional bolted connection, so that the overall dimension of the valve can be obviously reduced, the cost is reduced, and meanwhile, the valve body and the valve cover are beneficial to rapid and convenient disassembly and assembly, and the efficiency is improved.

Description

Anti-blocking electromagnetic valve

Technical Field

The utility model belongs to the technical field of machinery, and relates to a valve body structure, in particular to an anti-blocking electromagnetic valve.

Background

Solenoid valves (electro magnetic valves) are industrial equipment controlled by electromagnetic, are automatic basic elements for controlling fluids, and belong to actuators, not limited to hydraulic and pneumatic. The method is used for adjusting on-off, flow, speed and other parameters of a medium in an industrial control system. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. The solenoid valves are various, and different solenoid valves function at different positions of the control system, and the most common are pilot solenoid valves, direct-acting solenoid valves, step-by-step direct-acting solenoid valves, and the like. The pressure may be classified into a low pressure solenoid valve, a high pressure solenoid valve, etc. according to the working pressure.

High-pressure solenoid valves for water or gas, although they have been practically used for a long time, often present some problems:

1. the sealing property is unstable:

2. the external dimension is huge:

3. when the medium is not clean, the solenoid valve is easy to be blocked.

Disclosure of Invention

The utility model aims at solving the problems in the prior art, and provides an anti-blocking electromagnetic valve which is used for blocking large-particle impurities by filtering before a medium enters a pilot path so as to avoid blocking.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides an anti-blocking type solenoid valve, includes the valve body that has flow path and interface, the valve gap that has the pressure release pipe is established to the interface upper cover of valve body, electromagnetic actuation mechanism is connected on valve gap upper portion, the pressure release pipe periphery is sealed the cup joint piston, the piston with press between the valve gap and establish spring one, open back pressure hole on the piston, back pressure hole intercommunication flow path with the pressure release pipe forms the pressure release path, the piston in flow path with back pressure hole's interval keeps off the filter.

In the anti-blocking electromagnetic valve, the piston comprises a cylinder shell, a piston head is convexly arranged at the bottom of the cylinder shell, an annular filter groove is concavely arranged between the cylinder shell and the piston head, a back pressure cavity is formed between the cylinder shell and the pressure relief pipe inlet, the cylinder shell is provided with the back pressure hole through the bottom wall, the back pressure hole is communicated with the annular filter groove and the back pressure cavity, and the periphery of the annular filter groove is sleeved with the filter piece.

In the anti-blocking electromagnetic valve, the filter element is an annular sleeve body, and a filter screen is arranged on the peripheral wall of the annular sleeve body.

In the anti-blocking electromagnetic valve, a valve port is arranged in the middle of the flow path inside the valve body, a shutoff O-shaped ring is embedded in the bottom surface of the piston head, and the piston is pressed by the first spring, so that the valve port is blocked by the piston head through the shutoff O-shaped ring.

In the anti-blocking electromagnetic valve, the outer peripheral wall of the interface of the valve body is provided with the external thread, the inner peripheral wall of the valve cover is provided with the internal thread, and the valve cover is buckled with the outer periphery of the interface of the valve body to form thread meshing connection.

In the anti-blocking electromagnetic valve, a rubber O-shaped ring I is pressed between the valve cover and the interface of the valve body; and a rubber O-shaped ring II is sleeved between the pressure relief pipe and the piston.

In the anti-blocking electromagnetic valve, the electromagnetic suction mechanism comprises a fixed core component and a movable core component which are in plug-in fit, a second spring is clamped between the fixed core component and the movable core component, and the second spring presses the movable core component, so that the bottom end of the movable core component is blocked at the inlet of the pressure relief pipe.

In the anti-blocking electromagnetic valve, the core fixing assembly comprises a core fixing shaft, an electromagnetic coil is fixedly sleeved on the periphery of the core fixing shaft, and the bottom end of the core fixing shaft is provided with an installation cavity.

In the anti-blocking electromagnetic valve, the movable core assembly comprises a movable core shaft, a mounting hole is formed in the top end of the movable core shaft, the second spring penetrates into the mounting hole and enables the upper end of the second spring to be exposed, the movable core shaft is arranged in a mounting cavity of the fixed core shaft, and the exposed upper end of the second spring is pressed against the top wall of the mounting cavity.

In the anti-blocking electromagnetic valve, a step hole is formed in the bottom end of the movable mandrel, a pilot valve clack is embedded in the step hole, a conical table is convexly arranged at the inlet of the top end of the pressure relief pipe to form a pilot valve seat, and the pilot valve clack is pressed on the pilot valve seat to form a sealing plug.

Compared with the prior art, the anti-blocking electromagnetic valve has the following beneficial effects:

1. the back pressure hole of piston position is less to the aperture in current high pressure solenoid valve, adds filtration, when the medium is not too clean, intercepts large granule impurity in advance, makes comparatively clean liquid stream get into the guide path, can effectively avoid the stifled dead phenomenon of solenoid valve, ensures effective circulation behind the valve body opening, extension valve body life.

2. The valve body and the valve cover adopt threaded connection to replace traditional bolted connection, so that the overall dimension of the valve can be obviously reduced, the cost is reduced, and meanwhile, the valve body and the valve cover are beneficial to rapid and convenient disassembly and assembly, and the assembly efficiency is improved.

3. The sealing reliability is improved by adopting the rubber O-shaped ring with good sealing effect to replace the traditional PTFE sealing gasket, the closure effect of the valve body is ensured, and the service life of the valve body is further prolonged.

Drawings

Fig. 1 is an exploded view of the present anti-blocking solenoid valve.

Fig. 2 is a closing structure diagram of the present anti-blocking solenoid valve.

Fig. 3 is a diagram showing the opening structure of the present anti-blocking solenoid valve.

In the figure, 1, a valve body; 1a, a flow path inlet; 1b, a flow path outlet; 1c, valve port; 2. a valve cover; 2a, a pressure relief pipe; 3. a piston; 3a, back pressure holes; 3b, an annular filter tank; 4. a shutoff O-ring; 5. a first spring; 6. a filter; 7. rubber O-shaped ring I; 8. rubber O-shaped ring II; 9. a mandrel is fixed; 10. an electromagnetic coil; 11. a second spring; 12. a movable mandrel; 13. and a pilot valve clack.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1 to 3, the anti-blocking electromagnetic valve comprises a valve body 1 with a flow path and an interface, a valve cover 2 with a pressure relief pipe 2a is covered on the interface, an electromagnetic suction mechanism is mounted on the upper part of the valve cover 2, the periphery of the pressure relief pipe 2a is in sealing sleeve connection with a piston 3, a spring 5 is pressed between the piston 3 and the valve cover 2, a back pressure hole 3a is opened on the piston 3, the back pressure hole 3a is communicated with the flow path and the pressure relief pipe 2a to form a pressure relief path, and a filter element 6 is arranged between the flow path and the back pressure hole 3a in a spacing manner by the piston 3.

The piston 3 comprises a cylinder shell, the bottom of the cylinder shell is convexly provided with a piston head, an annular filter tank 3b is concavely arranged between the cylinder shell and the piston head, a back pressure cavity is formed between the cylinder shell and the inlet of the pressure relief pipe 2a, the cylinder shell is provided with a back pressure hole 3a through the bottom wall, the back pressure hole 3a is communicated with the annular filter tank 3b and the back pressure cavity, and the periphery of the annular filter tank 3b is sleeved with a filter piece 6.

After the piston 3 is opened, the medium intercepts impurities through the filter element 6 from the flow path inlet 1a, then enters the annular filter tank 3b, flows to the back pressure cavity through the back pressure hole 3a, and finally flows to the flow path outlet 1b from the pressure relief pipe 2 a. Through the blocking and filtering effect of the filtering piece 6, large-particle impurities are intercepted, so that the pressure release path is prevented from being blocked.

The filter element 6 is an annular sleeve body, and a filter screen is arranged on the peripheral wall of the annular sleeve body. The annular sleeve body is sleeved on the periphery of the annular filter tank 3b of the piston 3, and the notch of the annular filter tank 3b is blocked by the filter screen. The mesh size of the filter screen can be set according to the requirements so as to intercept particle impurities with different diameters.

The valve port 1c is arranged in the middle of a flow path in the valve body 1, the shutoff O-shaped ring 4 is embedded in the bottom surface of the piston head, and the first spring 5 presses the piston 3, so that the piston head seals the valve port 1c through the shutoff O-shaped ring 4. When the electromagnetic attraction mechanism is not operated, the piston 3 maintains the shut-off state of the flow path under the holding force of the first spring 5. The sealing reliability is improved by adopting the rubber O-shaped ring with good sealing effect to replace the traditional PTFE sealing gasket, and meanwhile, the sealing service life is prolonged and the sealing effect is improved.

The outer peripheral wall of the interface of the valve body 1 is provided with external threads, the inner peripheral wall of the valve cover 2 is provided with internal threads, and the valve cover 2 is buckled on the outer periphery of the interface to form threaded engagement connection. The valve body 1 and the valve cover 2 are connected by threads instead of bolts, so that the overall dimension of the valve can be obviously reduced, and the valve is convenient to disassemble and assemble quickly, so that maintenance and replacement are facilitated.

A rubber O-shaped ring I7 is pressed between the valve cover 2 and the interface of the valve body 1; a rubber O-shaped ring II 8 is sleeved between the pressure relief pipe 2a and the piston 3.

The electromagnetic attraction mechanism comprises a fixed core component and a movable core component which are in plug-in fit, a second spring 11 is clamped between the fixed core component and the movable core component, and the movable core component is pressed by the second spring 11, so that the bottom end of the movable core component is used for blocking the inlet of the pressure relief pipe 2 a. When the electromagnetic attraction mechanism does not act, the movable core assembly seals the inlet of the pressure relief pipe 2a under the pressure holding force of the second spring 11, so that the pressure relief path is kept in a cut-off state.

The core fixing assembly comprises a core fixing shaft 9, an electromagnetic coil 10 is fixedly sleeved on the periphery of the core fixing shaft 9, and an installation cavity is formed in the bottom end of the core fixing shaft 9.

The movable core assembly comprises a movable core shaft 12, a mounting hole is formed in the top end of the movable core shaft 12, the second spring 11 penetrates into the mounting hole and enables the upper end of the second spring to be exposed, the movable core shaft 12 is arranged in a mounting cavity of the fixed core shaft 9, and the exposed upper end of the second spring 11 is pressed against the top wall of the mounting cavity. The elastic force of the second spring 11 and the elastic expansion and contraction of the spring are used for matching with electromagnetic force generated when the electromagnetic coil 10 is electrified, so that the movable mandrel 12 moves up and down in the installation cavity, and switching of opening and closing is realized.

A step hole is formed in the bottom end of the movable mandrel 12, a pilot valve clack 13 is embedded in the step hole, a conical table is convexly arranged at the inlet of the top end of the pressure relief pipe 2a to form a pilot valve seat, and the pilot valve clack 13 is pressed on the pilot valve seat to form a close-fitting blocking. The pilot valve clack 13 and the pilot valve seat form flexible fit, so that the sealing performance of the plugging is improved, and leakage is avoided.

The anti-blocking electromagnetic valve has the following action principle:

1. as shown in fig. 2, the solenoid valve is closed when not energized:

when the electromagnetic coil 10 is not electrified, no electromagnetic force exists between the movable core shaft 12 and the fixed core shaft 9, the second spring 11 downwards presses the movable core shaft 12, the movable core shaft 12 downwards presses the pilot valve clack 13 on the pilot valve seat, and the pilot path is in a closed and shut-off state. The first spring 5 presses the piston 3 downwards, so that the shutoff O-shaped ring 4 on the piston head seals the valve port 1c, and the shutoff state of the flow path is maintained.

2. As shown in fig. 3, the solenoid valve is opened when energized:

after the electromagnetic coil 10 is electrified, an electromagnetic force which attracts each other is generated between the movable mandrel 12 and the fixed mandrel 9, and the movable mandrel 12 compresses the second spring 11 upwards and is attracted to the bottom of the fixed mandrel 9. The pilot valve clack 13 at the lower end of the movable mandrel 12 moves upwards synchronously, so that the pilot valve clack 13 is separated from the pilot valve seat to generate a gap. The liquid or gas medium in the high pressure state flows into the flow path from the inlet, firstly intercepts impurities through the filter element 6, then enters the annular filter tank 3b, flows to the back pressure cavity through the back pressure hole 3a, flows through the pressure relief pipe 2a as the pilot path is opened, and finally flows to the outlet 1b of the flow path from the pressure relief pipe 2 a. The medium in the outlet 1b of the flow path is in a low pressure state, the aperture of the back pressure hole 3a is far smaller than the aperture of the pressure relief pipe 2a, so that the pressure of the medium in the back pressure cavity can be reduced to be close to the low pressure of the medium in the outlet 1b of the flow path, the lower part of the piston 3 is impacted by the high pressure medium from the inlet 1a of the flow path, the piston 3 can overcome the pressure rising of the first spring 5, the valve port 1c is opened by the piston head, and the medium can directly flow from the inlet 1a of the flow path to the outlet 1b of the flow path through the valve port 1c, so that the main valve opening function is realized.

1. the back pressure hole of piston position is less to the aperture in current high pressure solenoid valve, adds filtration, when the medium is not too clean, intercepts large granule impurity in advance, makes comparatively clean medium get into the guide path, can effectively avoid the stifled dead phenomenon of solenoid valve, ensures effective circulation after the valve body is opened, extension valve body life.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although the valve body 1 is used more herein; a flow path inlet 1a; a flow path outlet 1b; valve port 1c; a valve cover 2; a pressure relief tube 2a; a piston 3; a back pressure hole 3a; an annular filter tank 3b; a shutoff O-ring 4; a first spring 5; a filter member 6; rubber O-shaped ring I7; rubber O-shaped ring II 8; a mandrel 9; an electromagnetic coil 10; a second spring 11; a movable mandrel 12; the term pilot flap 13 etc. does not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Claims

1. The utility model provides an anti-blocking type solenoid valve, includes the valve body that has circulation route and interface, its characterized in that, the valve gap that has the pressure release pipe is established to the interface upper cover, electromagnetic actuation mechanism is connected on valve gap upper portion, the pressure release pipe periphery is sealed the cup joint piston, the piston with press between the valve gap and establish spring one, open the back pressure hole on the piston, back pressure hole intercommunication the circulation route with the pressure release pipe forms the pressure release route, the piston in the circulation route with the interval in back pressure hole keeps off the filter.

2. The anti-blocking solenoid valve of claim 1, wherein the piston comprises a cylinder housing, a piston head is convexly arranged at the bottom of the cylinder housing, an annular filter groove is concavely arranged between the cylinder housing and the piston head, a back pressure cavity is formed between the cylinder housing and the pressure relief pipe inlet, the cylinder housing is provided with a back pressure hole through a bottom wall, the back pressure hole is communicated with the annular filter groove and the back pressure cavity, and the periphery of the annular filter groove is sleeved with the filter piece.

3. The anti-blocking solenoid valve of claim 2, wherein the filter element is an annular sleeve with a screen disposed on a peripheral wall thereof.

4. The anti-blocking solenoid valve of claim 2, wherein a valve port is provided in a middle portion of the flow path inside the valve body, a cutoff O-ring is embedded in a bottom surface of the piston head, and the spring holds the piston to cause the piston head to block the valve port through the cutoff O-ring.

5. The anti-blocking solenoid valve of claim 1, wherein an external thread is tapped from an outer peripheral wall of the port of the valve body, an internal thread is tapped from an inner peripheral wall of the valve cover, and the valve cover is fastened to an outer periphery of the port to form a threaded engagement connection.

6. The anti-blocking electromagnetic valve according to claim 1, wherein a rubber O-shaped ring I is pressed between the valve cover and the valve body; and a rubber O-shaped ring II is sleeved between the pressure relief pipe and the piston.

7. The anti-blocking electromagnetic valve according to claim 1, wherein the electromagnetic attraction mechanism comprises a fixed core assembly and a movable core assembly which are in plug-in fit, a second spring is clamped between the fixed core assembly and the movable core assembly, and the second spring is used for pressing the movable core assembly, so that the bottom end of the movable core assembly seals the inlet of the pressure relief pipe.

8. The anti-blocking solenoid valve of claim 7, wherein the centering assembly comprises a centering shaft, an electromagnetic coil is fixedly sleeved on the periphery of the centering shaft, and a mounting cavity is formed in the bottom end of the centering shaft.

9. The anti-blocking solenoid valve of claim 8, wherein the moving core assembly comprises a moving core shaft, a mounting hole is formed in the top end of the moving core shaft, the second spring penetrates into the mounting hole and exposes the upper end of the second spring, and the moving core shaft is installed in a mounting cavity of the fixed core shaft and enables the exposed upper end of the second spring to press against the top wall of the mounting cavity.

10. The anti-blocking electromagnetic valve according to claim 9, wherein a step hole is formed in the bottom end of the movable mandrel, a pilot valve clack is embedded in the step hole, a conical table is convexly arranged at the inlet of the top end of the pressure relief pipe to form a pilot valve seat, and the pilot valve clack is pressed on the pilot valve seat to form a close-fitting plug.