CN211852967U - Piston type electromagnetic valve - Google Patents

Abstract

The utility model provides a piston type electromagnetic valve with simple structure, stable work, low production cost, wide application range and high pressure-resistant grade; the electromagnetic valve comprises a valve body, a valve cover, a piston assembly, a sleeve, a fixed iron core, a movable iron core and a coil, wherein the bottom end of the sleeve is fixedly connected with the valve cover, the fixed iron core and the movable iron core are fixedly arranged in the sleeve, the movable iron core is movably arranged between the movable iron core and the fixed iron core, the coil is fixedly arranged outside the sleeve, a first valve cavity is formed between the sleeve, the fixed iron core and the valve cover, a pilot port for communicating a liquid outlet cavity with the first valve cavity is arranged in the valve body and in cooperation with the valve cover, the bottom end of the movable iron core is in sealing fit with the pilot port, the piston assembly is arranged between the valve body and the valve cover and is formed with a second valve cavity with the valve cover, the pilot port is communicated with the second valve cavity, the piston assembly comprises a piston, the piston is provided with a throttling channel for communicating.

Description

Piston type electromagnetic valve

Technical Field

The utility model relates to a solenoid valve technical field indicates a piston solenoid valve especially.

Background

The electromagnetic valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, and is not limited to hydraulic pressure and pneumatic pressure. Used in industrial control systems to regulate the direction, flow, velocity and other parameters of a medium. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. There are many types of solenoid valves, with different solenoid valves functioning at different locations in the control system, the most common being one-way valves, safety valves, directional control valves, speed control valves, etc.

The high-pressure electromagnetic valve in the prior art does not consider the impact of fluid on a main body part and the water jet cutting of a fluid passing part under the high-pressure condition of the valve body and the magnetism isolating pipe component. Often the solenoid valve can be used the effect in the early stage, and the sealing port is slowly cut and causes the leakage after using for a period of time. Secondly, the solenoid valve can not play the sealing effect under high pressure ordinary sealing member, whether popped out or cut, stability is not good, often the life-span can not guarantee. In addition, at the moment of opening and closing the electromagnetic valve, vortex flow can be generated by medium flow, so that the opening and closing of the electromagnetic valve are blocked.

Disclosure of Invention

In order to solve the above problems, the utility model provides a piston solenoid valve with simple structure, stable operation, low production cost, wide application range and high pressure-resistant grade.

In order to achieve the above object, the utility model adopts the following technical scheme: a piston type electromagnetic valve comprises a valve body, a valve cover, a piston assembly and a pilot assembly, wherein a liquid inlet cavity and a liquid outlet cavity are respectively arranged on the side wall of the valve body, the pilot assembly is arranged on the valve cover and comprises a sleeve, a fixed iron core, a movable iron core and a coil, the bottom end of the sleeve is fixedly connected with the valve cover, the sleeve is internally and fixedly provided with the fixed iron core and the movable iron core movably, a spring is arranged between the movable iron core and the fixed iron core in a propping manner, the coil is fixedly arranged outside the sleeve, a first valve cavity is formed between the sleeve, the fixed iron core and the valve cover, a pilot port for communicating the liquid outlet cavity with the first valve cavity is arranged in the matching manner of the valve body and the valve cover, the bottom end of the movable iron core is in sealing fit with the pilot port, the piston assembly is arranged between the valve body and the valve cover and is formed with the, the piston assembly comprises a piston, the piston is provided with a throttling channel for communicating the liquid inlet cavity with the second valve cavity, and a wear-resisting ring in sealing fit with the valve cover is embedded in the outer wall of the piston.

Specifically, the bottom of moving the iron core is provided with the mounting groove along the axial, the mounting groove internalization is provided with the sealing plug with the sealed complex of guide's mouth, support between the tank bottom of sealing plug and mounting groove and be equipped with the sealing plug spring.

Specifically, the piston assembly is disposed in the valve body in such a manner as to slide integrally with respect to the valve body.

Specifically, the outer wall of the piston is embedded with a sealing ring which is in sealing fit with the valve cover.

Specifically, the bottom fixedly connected with of sheathed tube connects the body, the sleeve pipe is connected with the valve gap through connecting the body, connect the body with the junction of valve gap inlays and is equipped with and connects the sealing washer.

Specifically, the sleeve is a magnetic insulating tube.

The beneficial effects of the utility model reside in that: the utility model discloses an opening and closing of leading mouthful is controlled to the piston assembly who adopts to constitute by cooperation such as piston, wear ring, simple structure not only, convenient assembling, and manufacturing cost is lower, has improved the high temperature resistance of valve body for working property is more stable, reliable, and the during operation pressure that can bear is also higher moreover, can effectively be applicable to high pressure, large-traffic application scenario.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention.

The reference numbers illustrate: 1. a valve body; 11. a liquid inlet cavity; 12. a liquid outlet cavity; 13. a pilot port; 14. a first valve chamber; 15. a second valve cavity; 2. a valve cover; 3. a piston assembly; a sleeve; 32. fixing an iron core; 33. a movable iron core; 331. mounting grooves; a pilot assembly; 41. a sleeve; 42. fixing an iron core; 43. a movable iron core; 44. and a coil.

Detailed Description

Referring to fig. 1, the present invention relates to a piston type electromagnetic valve, the electromagnetic valve includes a valve body 1, a valve cover 2, a piston assembly 3, and a pilot assembly 4, a liquid inlet chamber 11 and a liquid outlet chamber 12 are respectively disposed on a side wall of the valve body 1, the valve cover 2 is provided with the pilot assembly 4, the pilot assembly 4 includes a sleeve 41, a fixed iron core 42, a movable iron core 43, and a coil 44, a bottom end of the sleeve 41 is fixedly connected to the valve cover 2, the fixed iron core 42 and the movable iron core 43 are fixedly disposed in the sleeve 41, a spring is disposed between the movable iron core 43 and the fixed iron core 42, the coil 44 is fixedly disposed outside the sleeve 41, a first valve chamber 14 is formed between the sleeve 41, the fixed iron core 42, and the valve cover 2, the valve body 1 and the valve cover 2 are cooperatively disposed with a pilot port 13 for communicating the liquid outlet chamber 12 and the first valve chamber 14, a bottom end of the movable iron core 43 is hermetically, the piston assembly 3 is arranged between the valve body 1 and the valve cover 2 and is formed with a second valve cavity 15 together with the valve cover 2, the pilot port 13 is communicated with the second valve cavity 15, the piston assembly 3 comprises a piston, the piston is provided with a throttling channel for communicating the liquid inlet cavity 11 with the second valve cavity 15, and a wear-resistant ring hermetically matched with the valve cover 2 is embedded in the outer wall of the piston.

Compared with the prior art, the opening and closing of the pilot port 13 are controlled by the piston assembly formed by matching the piston, the wear-resisting ring and the like in the embodiment, the valve body 1 is simple and reasonable in structure, convenient to assemble and low in manufacturing cost, the high-temperature resistance is improved, the working performance is more stable and reliable, the pressure born during working is higher, and the valve body can be effectively applied to high-pressure and large-flow application occasions. Additionally, the utility model discloses set up wear ring at the outer wall of piston, the movement resistance when can effectively reducing piston axial displacement for action sensitivity is higher.

Specifically, a mounting groove 331 is axially disposed at the bottom of the movable iron core 33, a sealing plug hermetically fitted with the pilot port 13 is movably disposed in the mounting groove 331, and a sealing plug spring is disposed between the sealing plug and the groove bottom of the mounting groove 331 in a propping manner.

By adopting the above scheme, in this embodiment, in order to improve the blocking effect on the pilot port 13, the bottom of the movable iron core 33 is provided with the mounting groove 331 along the axial direction, a sealing plug hermetically matched with the pilot port 13 is movably arranged in the mounting groove 331, and a sealing plug spring is arranged between the sealing plug and the bottom of the mounting groove 331 in a supporting manner. Through setting up the sealing plug spring, both improved the sealing effect of sealing plug to guide's mouth 13, also effectively avoided the sealing plug to appear damaging the phenomenon simultaneously, prolonged life.

Specifically, the piston assembly 3 is provided in the valve body 1 so as to slide integrally with respect to the valve body 1.

By adopting the scheme, the piston assembly 3 can move in the valve body 1 more conveniently.

Specifically, the outer wall of the piston is embedded with a sealing ring which is in sealing fit with the valve cover 2.

By adopting the scheme, the sealing ring which is in sealing fit with the valve cover 2 is embedded in the outer wall of the piston in the embodiment, so that the sealing property between the piston and the valve cover 2 is further improved

Specifically, the bottom of the sleeve 41 is fixedly connected with a connector body, the sleeve 41 is connected with the valve cover 2 through the connector body, and a connector sealing ring is embedded at the joint of the connector body and the valve cover 2.

By adopting the above scheme, in this embodiment, in order to make the connection between the sleeve 41 and the valve cap 2 more convenient and tight, the bottom of the sleeve 41 is fixedly connected with the joint body, the sleeve 41 is connected with the valve cap 2 through the joint body, and the joint sealing ring is embedded at the joint of the joint body and the valve cap 2.

The above embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by the technical solution of the present invention by those skilled in the art are all within the scope of the present invention as defined by the claims.

Claims (6)

1. A piston solenoid valve characterized by: the electromagnetic valve comprises a valve body, a valve cover, a piston assembly and a pilot assembly, wherein a liquid inlet cavity and a liquid outlet cavity are respectively arranged on the side wall of the valve body, the pilot assembly is arranged on the valve cover and comprises a sleeve, a fixed iron core, a movable iron core and a coil, the bottom end of the sleeve is fixedly connected with the valve cover, the fixed iron core and the movable iron core are fixedly arranged in the sleeve, a spring is arranged between the movable iron core and the fixed iron core in a propping manner, the coil is fixedly arranged outside the sleeve, a first valve cavity is formed between the sleeve, the fixed iron core and the valve cover, a pilot port for communicating the liquid outlet cavity with the first valve cavity is arranged in the matching manner between the valve body and the valve cover, the bottom end of the movable iron core is in sealing fit with the pilot port, the piston assembly is arranged between the valve body and the valve cover and is formed with the valve cover to form a second, the piston is provided with a throttling channel for communicating the liquid inlet cavity with the second valve cavity, and a wear-resisting ring in sealing fit with the valve cover is embedded in the outer wall of the piston.

2. A piston-type electromagnetic valve as set forth in claim 1, wherein: the bottom of moving the iron core is provided with the mounting groove along the axial, the mounting groove internalization is provided with the sealing plug with the sealed complex of guide's mouth, support between the tank bottom of sealing plug and mounting groove and be equipped with the sealing plug spring.

3. A piston-type electromagnetic valve as set forth in claim 1, wherein: the piston assembly is arranged in the valve body in a mode that the piston assembly integrally slides relative to the valve body.

4. A piston-type electromagnetic valve as set forth in claim 1, wherein: and a sealing ring which is in sealing fit with the valve cover is embedded in the outer wall of the piston.

5. A piston-type electromagnetic valve as set forth in claim 1, wherein: the bottom of the sleeve is fixedly connected with a connector body, the sleeve is connected with the valve cover through the connector body, and a connector sealing ring is embedded in the joint of the connector body and the valve cover.

6. A piston-type electromagnetic valve according to any one of claims 1-5, characterized in that: the sleeve is a magnetic insulation pipe.

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