CN211951626U - Pilot-operated electromagnetic valve - Google Patents
Pilot-operated electromagnetic valve Download PDFInfo
- Publication number
- CN211951626U CN211951626U CN202020356766.4U CN202020356766U CN211951626U CN 211951626 U CN211951626 U CN 211951626U CN 202020356766 U CN202020356766 U CN 202020356766U CN 211951626 U CN211951626 U CN 211951626U
- Authority
- CN
- China
- Prior art keywords
- valve
- operating rod
- diaphragm assembly
- pilot
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fluid-Driven Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The utility model relates to the technical field of electromagnetic valves, in particular to a pilot-operated electromagnetic valve; the pilot-operated electromagnetic valve comprises a valve body, a valve cover, a diaphragm assembly and an operating rod; the valve cover is connected with the valve body in a sealing mode and encloses a valve cavity, and a first cavity, a second cavity and a main valve hole used for communicating the first cavity and the second cavity are formed in the valve cavity. The diaphragm assembly is located in the valve cavity, the edge of the diaphragm assembly is pressed between the valve cover and the valve body, and the diaphragm assembly can seal and block the main valve hole. One end of the operating rod is movably connected with the valve body, and the other end of the operating rod is positioned in the valve body and extends towards the direction of the diaphragm assembly; the operating rod can reciprocate along the length direction of the operating rod in the valve body so as to be close to or far away from the diaphragm assembly. When the operating rod moves a certain distance in the direction close to the diaphragm assembly, one end of the operating rod facing the diaphragm assembly is attached to the diaphragm assembly and pushes the diaphragm assembly to be far away from the main valve hole, so that the main valve hole is opened to open the pilot type electromagnetic valve, and the smoothness of a flow path is ensured.
Description
Technical Field
The utility model belongs to the technical field of the solenoid valve technique and specifically relates to a guide's formula solenoid valve is related to.
Background
The existing pilot-operated solenoid valves are all operated by lifting a valve rod by means of electromagnetic force to open a pilot valve hole, and then lifting a diaphragm by means of the acting force of medium pressure difference to open a main valve hole so as to communicate a feed port and a discharge port of the valve; however, when the electromagnetic head of the electromagnetic valve fails or is powered off and cannot work normally, the electromagnetic valve cannot be opened normally.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a guide's formula solenoid valve to still can normally open the solenoid valve when the unable normal during operation of electromagnetism head, guarantee the unobstructed of flow path.
The utility model provides a pilot-operated solenoid valve, which comprises a valve body, a valve cover, a diaphragm assembly and an operating rod; the valve cover is connected with the valve body and encloses the valve cavity, the diaphragm assembly is positioned in the valve cavity, and the edge of the diaphragm assembly is pressed between the valve cover and the valve body; the valve cavity forms a first chamber, a second chamber and a main valve bore for communicating the first chamber and the second chamber; the diaphragm can seal and block the main valve hole; one end of the operating rod is movably connected with the valve body, and the other end of the operating rod extends towards the diaphragm assembly; the operating rod is movable along its length such that the operating rod urges the diaphragm assembly away from the main valve bore toward one end of the diaphragm assembly.
Further, the valve body is formed with a mounting portion; the mounting part is provided with an internal thread connecting hole, and the outer wall of the operating rod is provided with an external thread matched with the internal thread connecting hole; the operating rod can extend into the valve body through the internal thread connecting hole, and one end, far away from the diaphragm assembly, of the operating rod is in threaded connection with the mounting part; rotating the operating rod can make the operating rod move along the length direction of the operating rod.
Further, one end, facing the internal thread connecting hole, of the operating rod is provided with a screwing part so as to rotate the operating rod.
Further, the sealing device also comprises a sealing nut; an external thread matched with the sealing nut is formed on the outer wall of the mounting part, so that the sealing nut is in threaded connection with the mounting part; and a first sealing gasket is arranged between the sealing nut and the end part of the mounting part.
Further, the diaphragm assembly comprises a diaphragm, a pressure plate and a fixing part; the edge part of the diaphragm is in compression joint with the valve body and the valve cover, and the diaphragm can seal and block the main valve hole; the pressing plate is connected with the diaphragm through the fixing part, and one side plate surface of the pressing plate is attached to the diaphragm.
Further, a first elastic piece is arranged between the diaphragm assembly and the valve cover; one end of the first elastic piece abuts against the valve cover, and the other end of the first elastic piece abuts against the diaphragm assembly; the fixing part is provided with a limiting hole, and one end of the first elastic piece facing the diaphragm assembly is positioned in the limiting hole; the valve cover is provided with a guide part extending towards the diaphragm assembly, and one end of the first elastic piece facing the valve cover is sleeved on the guide part.
The electromagnetic head further comprises an electromagnetic head, a static iron core and a movable iron core, wherein the static iron core and the movable iron core are positioned in the electromagnetic head; the static iron core comprises a static iron core body, a non-magnetic pipe and a magnetic conduction plate; one end of the non-magnetic pipe is sleeved outside the static iron core body, and the other end of the non-magnetic pipe is connected with the magnetic conduction plate; the static iron core is connected with the valve cover through the magnetic conduction plate, and a third chamber is formed between the static iron core and the valve cover; the valve cover is provided with a liquid inlet flow guide channel and a liquid outlet flow guide channel; one end of the liquid inlet diversion channel is communicated with the first chamber, and the other end of the liquid inlet diversion channel is communicated with the third chamber; a pilot hole is formed in the valve cover, one end of the liquid outlet guide channel is communicated with the third chamber through the pilot hole, and the other end of the liquid outlet guide channel is communicated with the second chamber; the movable iron core is positioned in the nonmagnetic tube and can seal and block the pilot hole.
Further, the movable iron core comprises a movable iron core body, a second elastic piece, a connecting column and a sealing assembly; the sealing assembly is connected with one end of the iron core body facing the third chamber and is used for sealing and plugging the pilot hole; the iron core body forms a hollow part, one end of the connecting column is inserted into the hollow part, and the other end of the connecting column is abutted against the static iron core body; the second elastic piece is located in the hollow portion, one end of the second elastic piece abuts against the connecting column, and the other end of the second elastic piece abuts against the sealing assembly.
Further, the sealing assembly comprises a second sealing gasket, a retainer ring and a fixed hood; one end of the iron core body facing the pilot hole forms a sealing part, and an installation space communicated with the hollow part is formed in the sealing part; the check ring and the second sealing gasket are sequentially embedded into the installation space, and the second elastic piece is abutted against the check ring; the fixed hood cap is clamped with the sealing part, and the end cover of the fixed hood cap tightly presses the second sealing gasket and the check ring in the mounting space; the end cover of the fixed hood is provided with a through hole so as to expose the second sealing gasket.
Furthermore, a filter screen and a throttle nozzle are arranged in the liquid inlet flow guide channel.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a pilot-operated solenoid valve, which comprises a valve body, a valve cover, a diaphragm assembly and an operating rod; the valve cover is connected with the valve body in a sealing mode, the valve cover and the valve body are enclosed to form a valve cavity, a first cavity, a second cavity and a main valve hole are formed in the valve cavity, and the first cavity is communicated with the second cavity through the main valve hole. The diaphragm assembly is positioned in the valve cavity, and the edge of the diaphragm assembly is pressed between the valve cover and the valve body; the diaphragm assembly is capable of sealing off the main valve bore, thereby shutting off communication between the first chamber and the second chamber while the pilot operated solenoid valve is in a closed state.
One end of the operating rod is movably connected with the valve body, and the other end of the operating rod is positioned in the valve body and extends towards the direction of the diaphragm assembly; the operating rod can reciprocate along the length direction of the operating rod in the valve body so as to be close to or far away from the diaphragm assembly. When the operating rod moves a certain distance in the direction close to the diaphragm assembly, one end of the operating rod facing the diaphragm assembly is attached to the diaphragm assembly and pushes the diaphragm assembly to be far away from the main valve hole, so that the main valve hole is opened, the first chamber is communicated with the second chamber, and the pilot type electromagnetic valve is opened. Therefore, by arranging the operating rod, the pilot type electromagnetic valve can be opened when the electromagnetic head of the pilot type electromagnetic valve cannot work, and the smoothness of a flow path is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a pilot-operated solenoid valve provided in an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
fig. 3 is a schematic structural diagram of a movable iron core provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a valve cover according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a diaphragm assembly according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a stationary core according to an embodiment of the present invention.
Reference numerals:
1-valve body, 11-first chamber, 12-second chamber, 13-main valve hole, 14-mounting part, 2-valve cover, 21-guiding part, 22-third chamber, 23-liquid inlet guide channel, 24-liquid outlet guide channel, 25-pilot hole, 26-filter screen, 27-throttling nozzle, 3-diaphragm component, 31-diaphragm, 32-pressing plate, 33-fixing part, 34-first elastic part, 35-limiting hole, 4-operating rod, 41-screwing part, 5-electromagnetic head, 51-static iron core body, 52-movable iron core body, 53-second elastic part, 54-connecting column, 55-second sealing gasket, 56-retaining ring, 57-fixing cover cap, 58-non-magnetic tube, 59-magnetic conducting plate, 6-sealing nut, 61-first sealing gasket.
Detailed Description
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.
The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A pilot-operated solenoid valve according to some embodiments of the present application is described below with reference to fig. 1 to 6.
The application provides a pilot-operated solenoid valve, as shown in fig. 1 to 6, comprising a valve body 1, a valve cover 2 and a diaphragm assembly 3; the valve cover 2 is connected with the valve body 1 in a sealing mode, the valve cover 2 and the valve body 1 are enclosed to form a valve cavity, a first cavity 11, a second cavity 12 and a main valve hole 13 are formed in the valve cavity, and the first cavity 11 is communicated with the second cavity 12 through the main valve hole 13. A fluid inlet and a fluid outlet are arranged on the valve body 1, wherein the fluid inlet is communicated with the first chamber 11, and the fluid outlet is communicated with the second chamber 12; the external fluid flows into the first chamber 11 through the fluid inlet, then flows into the second chamber 12 through the main valve hole 13, and finally flows out of the valve body 1 through the fluid outlet communicated with the second chamber 12.
The diaphragm assembly 3 is positioned in the valve cavity, and the edge of the diaphragm assembly 3 is pressed between the valve cover 2 and the valve body 1; the diaphragm assembly 3 is able to seal off the main valve bore 13 and thereby cut off communication between the first chamber 11 and the second chamber 12 when the pilot operated solenoid valve is in a closed state. Preferably, a first elastic part 34 is arranged between the diaphragm assembly 3 and the valve cover 2, one end of the first elastic part 34 abuts against the valve cover 2, and the other end of the first elastic part 34 abuts against the diaphragm assembly 3; the elastic force of the first elastic member 34 can provide a force to the diaphragm assembly 3 so that the diaphragm assembly 3 seals and seals the main valve hole 13.
The pilot-operated electromagnetic valve further comprises an electromagnetic head 5, a static iron core and a movable iron core, wherein the electromagnetic head 5 is used for being connected with an external power supply so as to control the pilot-operated electromagnetic valve to be opened and closed. Preferably, as shown in fig. 6, the stationary core includes a stationary core body 51, a non-magnetic tube 58 and a magnetic conductive plate 59, one end of the non-magnetic tube 58 is sleeved outside the stationary core body 51, and the other end of the non-magnetic tube 58 is connected to the magnetic conductive plate 59; the static iron core is connected with the valve cover 2 through a magnetic conduction plate 59, and a third chamber is formed between the static iron core and the valve cover 2; as shown in fig. 1 and 4, the valve cover 2 is formed with an inlet guide channel 23 and an outlet guide channel 24; one end of the liquid inlet diversion channel 23 is communicated with the first chamber 11, and the other end of the liquid inlet diversion channel 23 is provided with two ports, wherein one port is communicated with the third chamber 22, and the other port is communicated with a chamber formed between the diaphragm assembly 3 and the valve cover 2. The valve cap 2 is formed with a pilot hole 25 communicating with the third chamber 22, one end of the liquid outlet guide passage 24 communicates with the pilot hole 25 and further communicates with the third chamber 22, and the other end of the liquid outlet guide passage 24 communicates with the second chamber 12.
As shown in fig. 1, the movable iron core body 52 is located in the non-magnetic tube 58, and the movable iron core body 52 and the static iron core body 51 are oppositely arranged at intervals along the length direction of the non-magnetic tube 58; the end of the movable iron core body 52 far away from the static iron core body 51 can seal and block the pilot hole 25. Specifically, when the electromagnetic head 5 is powered off, the movable iron core body 52 moves towards the direction close to the valve cover 2 under the action of gravity and the elastic force of the second elastic piece 53, so as to seal and close the pilot hole 25 on the valve cover 2; the diaphragm assembly 3 seals and seals the main valve hole 13 under the driving of the first elastic piece 34; the fluid in the valve body 1 is positioned in the first chamber 11 and flows into the communicated third chamber 22 and the chamber between the upper part of the diaphragm assembly 3 and the valve cover 2 through the liquid inlet guide channel 23.
When the electromagnetic head is electrified, the static iron core body 51 generates electromagnetic force, the movable iron core body 52 is attracted to move in the direction away from the valve cover 2, and the pilot hole 25 is opened; the fluid above the diaphragm assembly 3 is rapidly discharged through the liquid outlet guide passage 24, so that the pressure in the chamber above the diaphragm assembly 3 is rapidly reduced, the pressure in the lower part of the diaphragm assembly 3 is reduced to be higher than the pressure in the upper part, the diaphragm assembly 3 is floated upwards under the action of the fluid medium pressure difference, the main valve hole 13 is opened, the first chamber 11 is communicated with the second chamber 12, and the pilot-operated solenoid valve is opened.
As shown in fig. 1, the pilot-operated solenoid valve further includes an operating rod 4, one end of the operating rod 4 is movably connected with the valve body 1, and the other end of the operating rod 4 is located in the valve body 1 and extends toward the diaphragm assembly 3; the operating rod 4 can reciprocate in the valve body 1 along its length direction to approach or separate from the diaphragm assembly 3.
Preferably, as shown in fig. 1 and 2, the lower end of the valve body 1 away from the bonnet 2 forms a mounting portion 14; an internal thread connecting hole is formed in the mounting part 14, and an external thread matched with the internal thread connecting hole is formed on the outer wall of the operating rod 4, so that the operating rod 4 can extend into the valve body 1 through the internal thread connecting hole and is in threaded connection with the valve body 1; thus, turning the operation lever 4 clockwise or counterclockwise can move the operation lever 4 toward or away from the diaphragm assembly 3; when the operating rod 4 is rotated to move a certain distance in a direction close to the diaphragm assembly 3, one end of the operating rod 4 facing the diaphragm assembly 3 will be attached to the diaphragm assembly 3 and push the diaphragm assembly 3 away from the main valve hole 13, so that the main valve hole 13 is opened, the first chamber 11 is communicated with the second chamber 12, and the pilot-operated solenoid valve is opened.
When the electromagnetic head 5 can normally work to control the opening or closing of the pilot type electromagnetic valve in specific use, the operating rod 4 is rotated to be away from the diaphragm component 3, so that the diaphragm component 3 can normally close or open the main valve hole 13; when the electromagnetic head 5 cannot work normally, such as when the electromagnetic head 5 fails or is powered off, the electromagnetic valve cannot be opened normally, the operating rod 4 is rotated to move towards the direction close to the diaphragm assembly 3, so that the operating rod 4 jacks up the diaphragm assembly 3, the main valve hole 13 is opened, and the pilot-operated electromagnetic valve is opened; therefore, by arranging the operating rod 4, the pilot type electromagnetic valve can be smoothly opened when the electromagnetic head 5 cannot work, and the smoothness of a flow path is ensured.
In one embodiment of the present application, it is preferable that, as shown in fig. 2, the end of the operating rod 4 at the end inside the female screw hole is provided with a screw part 41, and an operator can insert a tool into the female screw hole and clamp the screw part 41, so as to easily and quickly rotate the operating rod 4 and control the movement of the operating rod 4.
In one embodiment of the present application, preferably, as shown in fig. 1 and 2, a seal nut 6 is mounted on the mounting portion 14; an external thread matched with the sealing nut 6 is formed on the outer wall of the mounting part 14, so that the sealing nut 6 can be screwed on the mounting part 14; meanwhile, a first sealing gasket 61 is arranged between the sealing nut 6 and the mounting part 14, the sealing nut 6 is screwed on the mounting part 14, and the first sealing gasket 61 between the sealing nut 6 and the mounting part 14 is clamped, so that the internal thread connecting hole is sealed and blocked through the sealing nut 6, and the sealing performance of the valve body 1 is improved to a certain extent.
In one embodiment of the present application, preferably, as shown in fig. 5, the diaphragm assembly 3 includes a diaphragm 31, a pressing plate 32, and a fixing portion 33; wherein the edge of the diaphragm 31 is press-fitted between the valve body 1 and the bonnet 2, and the diaphragm 31 has a certain elasticity so that the diaphragm 31 can float up and down, thereby opening or closing the main valve hole 13. A pressure plate 32 is arranged on one side of the diaphragm 31 far away from the main valve hole 13, the pressure plate 32 is uniformly attached to the diaphragm 31, and the pressure plate 32 and the diaphragm 31 are fixedly connected together through a fixing part 33; therefore, when the solenoid valve is closed, the diaphragm 31 can be more uniformly pressed against the main valve hole 13, and the sealing performance of the pilot type solenoid valve can be improved.
Specifically, as shown in fig. 5, the fixing portion 33 is T-shaped, and includes a first fixing portion 33 and a second fixing portion 33 that are vertically connected; mounting holes are formed in the diaphragm 31 and the pressing plate 32, so that the diaphragm 31 and the pressing plate 32 can be sleeved on the first fixing part 33; a limiting groove is formed in one side, facing the diaphragm 31, of the second fixing part 33, and an inserting protrusion is formed on the diaphragm 31 and can be inserted into the limiting groove, so that the diaphragm 31 and the fixing part 33 are fixedly connected; the outer wall of the first fixing portion 33 at the end far from the second fixing portion 33 is formed with a tapered expanding section, by which the pressing plate 32 can be tightly pressed on the diaphragm 31, and the diaphragm 31 and the pressing plate 32 cannot be displaced in the length direction of the first fixing portion 33.
In one embodiment of the present application, preferably, as shown in fig. 1 and 5, a first elastic member 34 is located between the diaphragm assembly 3 and the bonnet 2 for driving the diaphragm assembly 3 to return to seal the main valve hole 13; two ends of the first elastic piece 34 respectively abut against the valve cover 2 and the diaphragm assembly 3, wherein the valve cover 2 is provided with a guide part 21 extending towards the direction of the diaphragm assembly 3, and one end of the first elastic piece 34 abutting against the valve cover 2 can be sleeved on the guide part 21; spacing hole 35 has been seted up on the fixed part 33 of diaphragm subassembly 3, the one end that first elastic component 34 and diaphragm subassembly 3 counterbalance leaned on stretches into spacing hole 35 in to through guide part 21 and spacing hole 35, make first elastic component 34 set up steadily between valve gap 2 and diaphragm subassembly 3, and guarantee that first elastic component 34 does not take place the skew, can provide stable, uniformly decurrent effort to diaphragm subassembly 3 all the time, make diaphragm subassembly 3 can seal main valve hole 13.
In one embodiment of the present application, preferably, as shown in fig. 1 and 3, the plunger includes a plunger body 52, a second elastic member 53, a connection post 54, and a sealing member; one end of the movable iron core body 52 is arranged opposite to the static iron core body 51 at an interval, and the other end of the movable iron core body 52 faces the valve cover 2 and can seal and seal the pilot hole 25 on the valve cover 2; the movable iron core body 52 is hollow to form a hollow part, one end of the connecting post 54 can be abutted against the static iron core body 51, and the other end of the connecting post 54 can be inserted into the hollow part; the sealing assembly is arranged at one end of the movable iron core body 52 facing the pilot hole 25, and can seal and block the pilot hole 25; the second elastic member 53 is located in the hollow portion, one end of the second elastic member 53 abuts against the connection column 54, and the other end of the second elastic member 53 abuts against the sealing component.
When the electromagnetic head 5 is in a power-off state, the movable iron core body 52 is in a position for sealing and plugging the pilot hole 25, the static iron core body 51 and the movable iron core body 52 are separated by a certain distance, and one end of the connecting column 54 extends out of the hollow part and is abutted against the static iron core body 51; when the electromagnetic head 5 is electrified, the electromagnetic force generated by the static iron core body 51 attracts the movable iron core body 52 and the sealing component to move upwards, and the sealing component is far away from the pilot hole 25, so that the pilot hole 25 is opened; the connecting column 54 is kept still, and the second elastic piece 53 is compressed along with the upward movement of the movable iron core body 52 and the sealing assembly; when the pilot-operated solenoid valve needs to be closed, the electromagnetic head 5 is powered off, no electromagnetic force is attracted, the movable iron core body 52 and the sealing assembly move downwards under the action of gravity and the elastic force of the second elastic piece 53, and the pilot hole 25 is sealed and plugged again; the pilot hole 25 is blocked and the pressure in the chamber above the diaphragm 31 rises rapidly, and the diaphragm 31 moves downward by the medium pressure difference and the elastic force of the first elastic member 34 and seals the main valve hole 13, thereby closing the pilot type solenoid valve. Preferably, the connection post 54 forms a guide boss towards one end of the second elastic member 53, and the second elastic member 53 can be sleeved on the guide boss, so as to ensure that the second elastic member 53 is stably lowered to be in a vertical state, and to provide a downward pushing force to the plunger body 52.
In this embodiment, preferably, as shown in fig. 3, the seal assembly includes a second seal gasket 55, a retainer ring 56, and a retainer cap 57; a sealing part is formed at one end of the movable iron core body 52 facing the pilot hole 25, the sealing part is provided with an installation space communicated with the hollow part, a retainer ring 56 and a second sealing gasket 55 are sequentially embedded into the installation space, and the retainer ring 56 is positioned at one end close to the second elastic piece 53, so that the second elastic piece 53 can be abutted against the retainer ring 56; in order to prevent the retainer ring 56 and the second seal gasket 55 from falling out of the installation space, a fixing cap 57 is provided on the installation portion 14, the fixing cap 57 can be engaged with the seal portion, and the end cap of the fixing cap 57 can be pressed against the second seal gasket 55, thereby pressing the second seal gasket 55 and the retainer ring 56 into the installation space. The end cap of the fixed cap 57 is provided with a through hole through which the second gasket 55 can be exposed, so that when the sealing assembly is pressed on the pilot hole 25, the pilot hole 25 can be sealed and blocked by the second gasket 55.
In an embodiment of the present application, as shown in fig. 1 and 4, preferably, a filter screen 26 and a throttle 27 are further disposed in the liquid inlet diversion channel 23, and after entering the liquid inlet diversion channel 23, the liquid in the first chamber 11 is filtered by the filter screen 26, and after being throttled by the throttle 27, enters the third chamber 22 and above the diaphragm assembly 3; the fluid can be filtered by arranging the filter screen 26, so that the liquid inlet guide channel 23 and the pilot hole 25 are prevented from being blocked; the medium flow in the liquid inlet guide channel 23 can be controlled by arranging the throttling nozzle 27, so that the pressure difference above and below the membrane component 3 is controlled to a certain extent.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A pilot-operated electromagnetic valve is characterized by comprising a valve body, a valve cover, a diaphragm assembly and an operating rod;
the valve cover is connected with the valve body and encloses the valve cavity, the diaphragm assembly is positioned in the valve cavity, and the edge of the diaphragm assembly is pressed between the valve cover and the valve body;
the valve cavity is formed with a first chamber, a second chamber and a main valve hole for communicating the first chamber and the second chamber; the diaphragm assembly can seal and block the main valve hole;
one end of the operating rod is movably connected with the valve body, and the other end of the operating rod extends towards the diaphragm assembly;
the operating rod is movable along its length such that the operating rod urges the diaphragm assembly away from the main valve bore toward one end of the diaphragm assembly.
2. The pilot type electromagnetic valve according to claim 1, wherein the valve body is formed with a mounting portion;
the mounting part is provided with an internal thread connecting hole, and the outer wall of the operating rod is provided with an external thread matched with the internal thread connecting hole;
the operating rod can extend into the valve body through the internal thread connecting hole, and one end, far away from the diaphragm assembly, of the operating rod is in threaded connection with the mounting part;
rotating the operating rod can make the operating rod move along the length direction of the operating rod.
3. The pilot-operated solenoid valve according to claim 2, wherein an end of the operating rod facing the female screw coupling hole is provided with a screw portion to screw the operating rod.
4. The pilot operated solenoid valve as recited in claim 2 further comprising a seal nut;
an external thread matched with the sealing nut is formed on the outer wall of the mounting part, so that the sealing nut is in threaded connection with the mounting part;
and a first sealing gasket is arranged between the sealing nut and the end part of the mounting part.
5. The pilot operated solenoid valve of claim 1, wherein the diaphragm assembly comprises a diaphragm, a pressure plate, and a fixing portion;
the edge part of the diaphragm is in pressure joint between the valve body and the valve cover, and the diaphragm can seal and block the main valve hole;
the pressing plate is connected with the diaphragm through the fixing part, and one side plate surface of the pressing plate is attached to the diaphragm.
6. The pilot operated solenoid valve according to claim 5, wherein a first elastic member is provided between the diaphragm assembly and the valve cover;
one end of the first elastic piece abuts against the valve cover, and the other end of the first elastic piece abuts against the diaphragm assembly;
the fixing part is provided with a limiting hole, and one end of the first elastic piece facing the diaphragm assembly is positioned in the limiting hole;
the valve cover is provided with a guide part extending towards the diaphragm assembly, and one end of the first elastic piece facing the valve cover is sleeved on the guide part.
7. The pilot-operated solenoid valve according to claim 1, further comprising an electromagnetic head, a stationary core, and a movable core;
the static iron core and the movable iron core are both arranged in the electromagnetic head, and the static iron core comprises a static iron core body, a non-magnetic pipe and a magnetic conduction plate; one end of the non-magnetic pipe is sleeved outside the static iron core body, and the other end of the non-magnetic pipe is connected with the magnetic conduction plate; the static iron core is connected with the valve cover through the magnetic conduction plate, and a third chamber is formed between the static iron core and the valve cover;
the valve cover is provided with a liquid inlet flow guide channel and a liquid outlet flow guide channel;
one end of the liquid inlet diversion channel is communicated with the first chamber, and the other end of the liquid inlet diversion channel is communicated with the third chamber;
a pilot hole is formed in the valve cover, one end of the liquid outlet guide channel is communicated with the third chamber through the pilot hole, and the other end of the liquid outlet guide channel is communicated with the second chamber;
the movable iron core is positioned in the nonmagnetic tube and can seal and block the pilot hole.
8. The pilot operated solenoid valve according to claim 7, wherein the plunger comprises a plunger body, a second resilient member, a connecting post, and a seal assembly;
the sealing assembly is connected with one end, facing the third chamber, of the iron core body and is used for sealing and plugging the pilot hole;
the iron core body is provided with a hollow part, one end of the connecting column is inserted into the hollow part, and the other end of the connecting column is abutted against the static iron core body;
the second elastic piece is located in the hollow portion, one end of the second elastic piece abuts against the connecting column, and the other end of the second elastic piece abuts against the sealing assembly.
9. The pilot operated solenoid valve of claim 8, wherein the seal assembly comprises a second gasket, a retainer ring, and a retaining cap;
one end of the iron core body facing the pilot hole forms a sealing part, and an installation space communicated with the hollow part is formed in the sealing part;
the check ring and the second sealing gasket are sequentially embedded into the installation space, and the second elastic piece is abutted against the check ring;
the fixed hood cap is clamped with the sealing part, and the end cover of the fixed hood cap tightly presses the second sealing gasket and the check ring in the mounting space; the end cover of the fixed hood is provided with a through hole so as to expose the second sealing gasket.
10. The pilot-operated electromagnetic valve according to claim 7, wherein a filter screen and a throttle nozzle are arranged in the liquid inlet guide passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020356766.4U CN211951626U (en) | 2020-03-19 | 2020-03-19 | Pilot-operated electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020356766.4U CN211951626U (en) | 2020-03-19 | 2020-03-19 | Pilot-operated electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211951626U true CN211951626U (en) | 2020-11-17 |
Family
ID=73178854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020356766.4U Active CN211951626U (en) | 2020-03-19 | 2020-03-19 | Pilot-operated electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211951626U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087398A (en) * | 2021-12-17 | 2022-02-25 | 鞍山电磁阀有限责任公司 | Double-diaphragm electromagnetic valve |
-
2020
- 2020-03-19 CN CN202020356766.4U patent/CN211951626U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087398A (en) * | 2021-12-17 | 2022-02-25 | 鞍山电磁阀有限责任公司 | Double-diaphragm electromagnetic valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106704618B (en) | High-performance gate valve | |
| KR101401086B1 (en) | Prefabricated high-pressure flow control valve | |
| CN211951626U (en) | Pilot-operated electromagnetic valve | |
| CN111237533A (en) | Pilot-operated electromagnetic valve | |
| WO2023179628A1 (en) | Electromagnetic valve | |
| CN210003819U (en) | sampling stop valve | |
| CN214743686U (en) | Fire control high pressure solenoid valve | |
| CN215980998U (en) | Pilot-operated type hydraulic control one-way valve | |
| CN221120918U (en) | Electromagnetic valve | |
| CN219549647U (en) | Gate valve | |
| CN218236158U (en) | Electromagnetic valve structure based on Bernoulli principle | |
| CN215487747U (en) | High-reliability zero-leakage disconnecting link type electromagnetic valve | |
| CN220910615U (en) | Normally open and normally closed pulse control water-discharging electromagnetic valve | |
| CN220706441U (en) | Electromagnetic communication valve | |
| CN221237180U (en) | Right-angle regulating valve with tetrafluoro corrugated pipe regulating cone | |
| CN214946395U (en) | Differential pressure fluid controller | |
| CN215371229U (en) | Pilot-operated type electromagnetic valve | |
| CN217713740U (en) | Electromagnetic valve | |
| CN218625559U (en) | High-pressure regulating valve | |
| CN218152538U (en) | Pressure reducing valve with filtering function | |
| CN206708380U (en) | A kind of laterally opened magnetic valve | |
| CN214063802U (en) | Pilot-operated type electromagnetic valve | |
| CN219242795U (en) | High pressure differential medium flow regulating valve | |
| CN214662041U (en) | High-end exquisite type solenoid valve with zero leakage | |
| CN2784678Y (en) | Steam valve shut-off device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |