CN216895911U

CN216895911U - Internal exhaust type electromagnetic valve

Info

Publication number: CN216895911U
Application number: CN202122811215.XU
Authority: CN
Inventors: 毛秉; 张优波; 单位银; 竺吉珍; 徐刚行
Original assignee: Ningbo Sono Manufacturing Co ltd
Current assignee: Ningbo Sono Manufacturing Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-07-05
Anticipated expiration: 2031-11-17

Abstract

The utility model discloses an internal exhaust type electromagnetic valve, which comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve rod is arranged in the valve body, air holes penetrating through the outer wall of the valve rod are respectively arranged at the two side ends of the valve rod, an air guide channel extending along the axial direction of the valve rod is arranged in the valve rod, the air holes at the two sides are communicated through the air guide channel, through the research and development of an internal loop of the valve rod, the exhaust mode of the traditional pilot valve is changed, dust is uniformly exhausted through an exhaust channel of the pilot valve, the dust is prevented from entering the valve cavity from a gap between the valve body and a left end cover or between the valve body and a right end cover, and a rotary type double-internal-tooth elbow of the pilot valve is arranged at the position corresponding to the exhaust channel of a pilot valve assembly, so that the reversing noise of the pilot valve is reduced.

Description

Internal exhaust type electromagnetic valve

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to an internal exhaust type electromagnetic valve.

Background

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

The traditional electromagnetic valve adopts the valve seat to open the hole for exhausting and reversing, dust is easily sucked into the exhaust hole, so that the valve has the phenomena of air leakage and inflexible reversing, and meanwhile, the existing electromagnetic valve has the defects of insensitive reversing of a pilot valve, air leakage, easy fatigue of spring resetting and the like in a dust environment, so that the special requirements of the automobile industry cannot be met.

Disclosure of Invention

The utility model aims to provide an internal-discharge type electromagnetic valve, which changes the exhaust mode of the traditional pilot valve through the research and development of an internal loop of a valve rod, uniformly discharges through an exhaust passage of the pilot valve and avoids dust from entering a valve cavity from a gap between a valve body and a left end cover or a gap between the valve body and a right end cover.

The technical purpose of the utility model is realized by the following technical scheme: the inner-discharging type electromagnetic valve comprises a valve body, wherein a left end cover and a right end cover are fixedly connected to two ends of the valve body respectively, a valve cavity is arranged in the valve body, a left cavity communicated with the valve cavity is arranged at the position, corresponding to the valve cavity, of the left end cover, a right cavity communicated with the valve cavity is arranged at the position, corresponding to the valve cavity, of the right end cover, a first piston in sliding fit with the cavity wall of the left cavity is fixedly connected to the left end of a valve rod arranged in the valve cavity, a second piston in sliding fit with the cavity wall of the right cavity is fixedly connected to the right end of the valve rod, an air inlet P communicated with the valve cavity is arranged in the valve body, a first air passage communicated with the left cavity and the air inlet P is arranged in the valve body, a second air passage communicated with the right cavity and the air inlet P is arranged in the valve body, a pilot valve assembly is fixedly installed at one end, corresponding to the right cavity, and used for conducting or cutting off the second air passage, the valve body is internally provided with a valve rod, the end parts of the two sides of the valve rod are respectively provided with an air hole penetrating through the outer wall of the valve rod, an air guide channel extending along the axial direction of the valve rod is arranged in the valve rod, and the air holes on the two sides are communicated through the air guide channel.

Further, the first piston is a small piston, the second piston is a large piston, and a pilot valve assembly is arranged at one end, corresponding to the large piston, of the valve body.

Furthermore, the pilot valve component comprises an exhaust passage communicated with the right chamber, when the pilot valve component is electrified, the second air passage is communicated, the exhaust passage is isolated, and when the pilot valve component is powered off, the second air passage is isolated, and the exhaust passage is communicated.

Furthermore, a rotary double-inner-tooth elbow is installed at the position, corresponding to the exhaust passage, of the pilot valve assembly.

Further, the valve body is also provided with a gas outlet A and a gas outlet R, and the gas outlet A and the gas outlet R are respectively communicated with the valve cavity.

Further, the valve body is further provided with a gas outlet A, a gas outlet B, a gas outlet R and a gas outlet S, and the gas outlet A, the gas outlet B, the gas outlet R and the gas outlet S are respectively communicated with the valve cavity.

In conclusion, the utility model has the following beneficial effects:

through the research and development of the internal loop of the valve rod, the exhaust mode of the traditional pilot valve is changed, the dust is prevented from entering the valve cavity from the gap between the valve body and the left end cover or the gap between the valve body and the right end cover through the exhaust passage of the pilot valve, and the rotary double-inner-tooth elbow is installed at the position of the pilot valve component corresponding to the exhaust passage so as to reduce the reversing noise of the pilot valve.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1. a valve body; 11. a valve cavity; 12. a valve stem; 121. a first air hole; 122. a second air hole; 123. an air guide channel; 13. a first air passage; 14. a second air passage; 2. a left end cap; 21. a left chamber; 22. a first piston; 3. a right end cap; 31. a right chamber; 32. a second piston; 4. a pilot valve assembly; 41. an exhaust passage; 5. a rotary double-inner-tooth elbow.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

As shown in fig. 1, the internal-displacement electromagnetic valve includes a valve body 1, a valve cavity 11 is arranged in the valve body 1, two ends of the valve body 1 are respectively and fixedly connected with a left end cover 2 and a right end cover 3, a left chamber 21 communicated with the valve cavity 11 is arranged at a position of the left end cover 2 corresponding to the valve cavity 11, a right chamber 31 communicated with the valve cavity 11 is arranged at a position of the right end cover 3 corresponding to the valve cavity 11, a first piston 22 slidably matched with a chamber wall of the left chamber 21 is fixedly connected to a left end of a valve rod 12 arranged in the valve cavity 11, a second piston 32 slidably matched with the chamber wall of the right chamber 31 is fixedly connected to a right end of the valve rod 12, specifically, a left limit step is formed between one end of the valve body 1 corresponding to the left end cover 2 and the left end cover 2, the left limit step is used for limiting the first piston 22, and a right limit step is formed between one end of the valve body 1 corresponding to the right end cover 3 and the right end cover 3, the right limit step is used for limiting the second piston 32, wherein the diameter of the first piston 22 is smaller than that of the second piston 32, that is, the first piston 22 is a small piston, the second piston 32 is a large piston, a pilot valve assembly 4 is arranged at one end of the valve body 1 corresponding to the large piston, and when compressed gas is introduced into the left chamber 21 and the right chamber 31, the pressure receiving area of the second piston 32 is larger than that of the first piston 22, and the second piston 32 can push the valve rod 12 to move leftwards under the action of pressure difference.

The valve body 1 is internally provided with a valve rod 12, the two side ends of the valve rod 12 are respectively provided with air holes penetrating through the outer wall of the valve rod 12, specifically, a first air hole 121 arranged on the left side of the valve rod 12 and a second air hole 122 arranged on the right side of the valve rod 12, an air guide channel 123 extending along the axial direction of the valve rod 12 is arranged in the valve rod 12, the first air hole 121 is communicated with the second air hole 122 through the air guide channel 123, and through the design, in the process of moving the piston to the right, air inside a left chamber 21 (the left chamber 21 corresponds to the inner side of a first piston 22) sequentially enters the first air hole 121, the air guide channel 123 and the second air hole 122 under the action of the first piston 22, and finally enters a right chamber 31; similarly, in the process of moving the piston to the left, the air inside the right chamber 31 (the right chamber 31 corresponds to the inside of the second piston 32) sequentially enters the second air hole 122, the air guide channel 123 and the first air hole 121 under the action of the second piston 32, and finally enters the left chamber 21, and for the structural design of the valve rod 12, internal air discharge inside the valve cavity 11 is realized, compared with the conventional solenoid valve which adopts a valve seat opening for exhaust reversing, the structure prevents dust from entering the valve cavity 11 from a gap between the valve body 1 and the left end cover 2 or between the valve body 1 and the right end cover 3.

The valve body 1 is equipped with the air inlet P with valve pocket 11 intercommunication, the valve body 1 is equipped with the first air flue 13 of intercommunication left cavity 21 and air inlet P with the cooperation of left end lid 2, the valve body 1 is equipped with the second air flue 14 of intercommunication right cavity 31 and air inlet P with the cooperation of right end lid 3, the one end fixed mounting that the valve body 1 corresponds right cavity 31 has pilot valve subassembly 4, pilot valve subassembly 4 is used for switching on or cuts off second air flue 14.

The pilot valve assembly 4 comprises an exhaust passage 41 communicated with the right chamber 31, when the pilot valve assembly 4 is electrified, the second air passage 14 is communicated, the exhaust passage 41 is isolated, and when the pilot valve assembly 4 is electrified, the second air passage 14 is isolated, and the exhaust passage 41 is communicated.

In a first structure, the valve body 1 of the electromagnetic valve is also provided with a gas outlet A and a gas outlet R, wherein the gas outlet A and the gas outlet R are respectively communicated with the valve cavity 11, namely, the electromagnetic valve can be designed into a two-position three-way electromagnetic valve.

In a second structure, the valve body 1 is further provided with a gas outlet A, a gas outlet B, a gas outlet R and a gas outlet S, wherein the gas outlet A, the gas outlet B, the gas outlet R and the gas outlet S are respectively communicated with the valve cavity 11, namely the electromagnetic valve can be designed into a two-position five-way electromagnetic valve.

The rotary double-inner-tooth elbow 5 is arranged at the position, corresponding to the exhaust passage 41, of the pilot valve component 4, and the reversing noise of the pilot valve can be reduced by arranging the rotary double-inner-tooth elbow 5.

The basic working principle of the utility model (taking a two-position three-way electromagnetic valve as an example) is as follows:

in an initial state, the pilot valve assembly 4 is not energized, at this time, compressed gas is introduced into the gas inlet P, the compressed gas in the gas inlet P flows into the valve cavity 11 and flows into the left chamber 21 through the first gas passage 13, so that the pressure of the left chamber 21 is increased, the first piston 22 is pressed and drives the valve rod 12 to move rightward, at this time, the gas outlet a is communicated with the gas outlet R, and in the process of moving rightward of the piston, air inside the left chamber 21 sequentially enters the first gas hole 121, the gas guide passage 123 and the second gas hole 122 under the action of the first piston 22, and finally enters the right chamber 31; when the pilot valve assembly 4 is powered on, the movable iron core of the pilot valve assembly 4 is attracted by the static iron core, so that the second air passage 14 is communicated with the right chamber 31, the air entering from the air inlet P flows into the right chamber 31 through the second air passage 14, the pressure of the right chamber 31 is increased, because the pressure area of the second piston 32 is larger than that of the first piston 22, the second piston 32 can push the valve rod 12 to move leftwards under the action of pressure difference, the air inlet P is communicated with the air outlet B at the moment, the air outlet B is isolated from the air outlet R, and in the process of moving leftwards, the air inside the right chamber 31 sequentially enters the second air hole 122, the air guide channel 123 and the first air hole 121 under the action of the second piston 32 and finally enters the left chamber 21; the arrangement of the first air hole 121, the second air hole 122 and the air guide channel 123 realizes the internal discharge of the main valve gas, and dust is prevented from entering the valve cavity 11 from a gap between the valve body 1 and the left end cover 2 or between the valve body 1 and the right end cover 3.

The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.

Claims

1. An inner-discharging type electromagnetic valve comprises a valve body (1), wherein the two ends of the valve body (1) are fixedly connected with a left end cover (2) and a right end cover (3) respectively, a valve cavity (11) is arranged in the valve body (1), a left cavity (21) communicated with the valve cavity (11) is arranged at the position, corresponding to the valve cavity (11), of the left end cover (2), a right cavity (31) communicated with the valve cavity (11) is arranged at the position, corresponding to the valve cavity (11), of the right end cover (3), a first piston (22) in sliding fit with the cavity wall of the left cavity (21) is fixedly connected with the left end of a valve rod (12) arranged in the valve cavity (11), a second piston (32) in sliding fit with the cavity wall of the right cavity (31) is fixedly connected with the right end of the valve rod (12), an air inlet P communicated with the valve cavity (11) is arranged in the valve body (1), a first air passage (13) communicated with the left cavity (21) and the air inlet P is arranged in the valve body (1) in a matched with the left end cover (2), valve body (1) and right-hand member lid (3) cooperation are equipped with second air flue (14) of intercommunication right cavity (31) and air inlet P, the one end fixed mounting that valve body (1) corresponds right cavity (31) has pilot valve subassembly (4), pilot valve subassembly (4) are used for switching on or cut off second air flue (14), its characterized in that: the valve comprises a valve body (1), a valve rod (12) is arranged in the valve body (1), air holes penetrating through the outer wall of the valve rod (12) are formed in the end portions of the two sides of the valve rod respectively, an air guide channel (123) extending along the axial direction of the valve rod is arranged in the valve rod (12), and the air holes in the two sides are communicated through the air guide channel (123).

2. The internal displacement solenoid valve as set forth in claim 1, wherein: the first piston (22) is a small piston, the second piston (32) is a large piston, and a pilot valve assembly (4) is arranged at one end, corresponding to the large piston, of the valve body (1).

3. The internal displacement solenoid valve as set forth in claim 1, wherein: the pilot valve assembly (4) comprises an exhaust passage (41) communicated with the right chamber (31), when the pilot valve assembly (4) is electrified, the second air passage (14) is communicated, the exhaust passage (41) is isolated, and when the pilot valve assembly (4) is electrified, the second air passage (14) is isolated, and the exhaust passage (41) is communicated.

4. The internal displacement solenoid valve as set forth in claim 3 wherein: and a rotary double-inner-tooth elbow (5) is arranged at the position of the pilot valve component (4) corresponding to the exhaust passage (41).

5. The internal exhaust type solenoid valve as set forth in any one of claims 1-4 wherein: the valve body (1) is further provided with a gas outlet A and a gas outlet R, and the gas outlet A and the gas outlet R are respectively communicated with the valve cavity (11).

6. The internal exhaust type solenoid valve as set forth in any one of claims 1-4 wherein: the valve body (1) is further provided with a gas outlet A, a gas outlet B, a gas outlet R and a gas outlet S, wherein the gas outlet A, the gas outlet B, the gas outlet R and the gas outlet S are respectively communicated with the valve cavity (11).