CN218178001U - Two-position five-way pilot type explosion-proof electromagnetic valve - Google Patents

Abstract

The utility model provides a two-position five-way pilot-operated type explosion-proof electromagnetic valve, which comprises a valve body, wherein one end of the valve body is hermetically connected with a valve cover, the other end of the valve body is hermetically connected with a pilot seat, the valve body and the interior of the valve cover form a main valve cavity, and a valve core assembly which moves in a reciprocating manner is arranged in the main valve cavity; the pilot exhaust seat is vertically connected to the pilot seat, and an exhaust channel communicated with the interior is arranged on the side wall of the pilot exhaust seat; the explosion-proof shell is rotatably sleeved on the pilot exhaust seat and is locked or unlocked through the locking structure; the movable iron core is arranged in the explosion-proof shell in a reciprocating manner along the axial direction of the movable iron core, and a pilot gas switch piece is arranged at the front end of the movable iron core; and the static iron core is arranged on the pilot exhaust seat, extends into the explosion-proof shell, is coaxially arranged with the movable iron core and is positioned above the movable iron core. The utility model discloses can realize that explosion-proof casing is around self axial rotation, reduce explosion-proof face number and gas circuit connection part, reduce explosion-proof casing size, reduce the machining precision requirement of part.

Description

Two-position five-way pilot type explosion-proof electromagnetic valve

Technical Field

The utility model belongs to the technical field of the solenoid valve, especially, relate to an explosion-proof solenoid valve of two five-way pilot-operated types.

Background

The solenoid valve, as one of the executing elements of the fluid control automation system, has become the first choice product of fluid control automation due to its superior characteristics of low price, simplicity, fast action, easy installation, easy maintenance, etc. The method is widely applied to automatic control equipment in the industries of manufacturing industrial equipment, energy, railway transportation, petroleum, chemical engineering, industrial automation, coal, nuclear power, military industry, ocean, aerospace and the like. Most of the application places are dangerous place areas, and certain explosion-proof level requirements are provided for the dangerous place areas. Most of the explosion-proof electromagnetic valves used in China are basically monopolized by foreign countries, and the current domestic explosion-proof electromagnetic valves have the defects of large volume of explosion-proof shells, incapability of rotating in any direction during installation, low cyclic utilization rate of integral parts, short service life and the like; therefore, the significance of developing a high-quality electromagnetic valve with explosion-proof property for developing the domestic electromagnetic valve market is great.

In terms of the rotation problem of the explosion-proof shell of the electromagnetic valve, two methods are mainly used in China: firstly, the explosion-proof shell and the valve body are connected through a certain number of bolts and nuts, and the method can only rotate at a fixed angle and cannot realize rotation at any angle; and secondly, the hole is axially positioned by the elastic check ring and then locked by the locking screw, the method realizes 360-degree arbitrary rotation, but the method can be realized only by increasing the size of the explosion-proof shell, and the cost is higher. In the prior gas-guiding exhaust problem, the domestic part exhausts by a method of opening a hole at the upper part of a static iron core, the method needs to open a hole on an explosion-proof shell cover, so that the explosion-proof surface is increased under the condition of meeting the explosion-proof requirement, and meanwhile, the connection relation with the static iron core needs to be considered, so that the machining precision requirement is higher. On the problem of minimum working pressure, internal pilot ventilation (shared by a pilot gas source and a working gas source) is adopted for domestic electromagnetic valves, and the electromagnetic valves can be switched normally only when the minimum working pressure (0.2 MPa which is common in China) is reached.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcoming of the prior art, the utility model aims to provide an explosion-proof solenoid valve of two five-way pilot-operated type for solve among the prior art explosion-proof solenoid valve and have explosion-proof casing can not the arbitrary direction rotatory and the problem that the gas of leading discharges and lead to explosion-proof face to increase.

In order to realize above-mentioned purpose and other relevant purpose, the utility model provides an explosion-proof solenoid valve of two five-way guide's formula, include:

the valve comprises a valve body, a valve cover and a pilot seat, wherein one end of the valve body is connected with the valve cover in a sealing manner, the other end of the valve body is connected with the pilot seat in a sealing manner, the pilot seat, the valve body and the valve cover form a main valve cavity, and a valve core assembly which moves in a reciprocating manner is arranged in the main valve cavity;

the guide exhaust seat is vertically connected to the guide seat, and an exhaust channel communicated with the interior of the guide exhaust seat is arranged on the side wall of the guide exhaust seat;

the explosion-proof shell is rotatably sleeved on the pilot exhaust seat and is locked or unlocked through a locking structure;

the movable iron core is arranged in the explosion-proof shell in a reciprocating motion way along the axial direction of the movable iron core, and a pilot gas switch piece is arranged at the front end of the movable iron core; and

and the static iron core is arranged on the pilot exhaust seat, extends into the explosion-proof shell, is coaxially arranged with the movable iron core and is positioned above the movable iron core.

Optionally, the locking structure includes a first locking portion disposed on the pilot exhaust seat and a second locking portion disposed on the explosion-proof housing, and the second locking portion cooperates with the first locking portion to lock or unlock the explosion-proof housing and the pilot exhaust seat.

Optionally, the first locking portion is a circle of annular grooves formed in the circumferential side wall of the pilot exhaust seat, the second locking portion is a plurality of locking holes formed in the circumferential side wall of the explosion-proof housing, and locking screws penetrate through the locking holes and abut against the annular grooves or are separated from the annular grooves to lock or unlock the explosion-proof housing and the pilot exhaust seat.

Optionally, an accommodating cavity is arranged between the pilot exhaust seat and the pilot seat, an exhaust end of the exhaust channel is located on the annular groove, an exhaust cap used for preventing external impurities from blocking the exhaust end is arranged on the exhaust end, and an air inlet end of the exhaust channel is communicated with the accommodating cavity.

Optionally, the pilot gas switch component is in the containing cavity moves, and the pilot gas switch component forms a plane seal with the pilot exhaust seat and the pilot seat respectively when the movable iron core reciprocates, and a first elastic component is sleeved on the pilot gas switch component and supported between the pilot gas switch component and the pilot seat.

Optionally, an outer pilot air inlet is formed in the side wall of the pilot base, and the outer pilot air inlet is respectively communicated with the accommodating cavity and the main valve cavity; an air inlet and two air outlets are formed in the side wall of the valve body, and the air inlet and the air outlets are communicated with the main valve cavity.

Optionally, the device further comprises a manual switch piece, the manual switch piece is arranged in an installation cavity inside the pilot base, and is in sealing connection and sliding fit with the installation cavity, the outer pilot air inlet is communicated with the installation cavity, and the installation cavity is respectively communicated with the accommodating cavity and the main valve cavity; the first end cover of manual switch spare is equipped with the second elastic component, the second elastic component supports between manual switch spare and guide seat, the second end of manual switch spare is close to the lateral wall of guide seat.

Optionally, the front end of the static iron core is connected to the pilot exhaust seat, the rear end of the static iron core is sleeved with a coil piece, the coil piece is located in the explosion-proof housing and connected with the explosion-proof housing through a mounting plate, so that the coil part rotates along with the explosion-proof shell synchronously, the front end of the movable iron core is sleeved with a third elastic part, the third elastic part is supported between the front ends of the movable iron core and the static iron core, and a fourth elastic part is connected between the rear end of the movable iron core and the static iron core in a butting mode.

Optionally, the valve core assembly includes a piston, a valve core and a valve core support, the valve core support is in sliding fit with the main valve cavity and forms a plurality of sealing cavities, the valve core is connected to the valve core support, a first end of the valve core is connected to the piston, and a fifth elastic element is abutted between a second end of the valve core and the valve cover.

Optionally, still include explosion-proof cap, explosion-proof cap seal set up in on the explosion-proof casing, just the anticreep screw has been seted up on the explosion-proof cap, wear to establish through the anticreep screw in order to connect explosion-proof cap and explosion-proof casing in the anticreep screw.

As described above, the utility model discloses following beneficial effect has:

1. the explosion-proof shell is connected and locked with the pilot exhaust seat through the locking structure, so that the explosion-proof shell can play a role in connection and fixation and is convenient to install, and the explosion-proof shell can rotate in any direction of 360 degrees around the self-axial direction;

2. the pilot exhaust seat integrates rotation, locking and a pilot exhaust channel, the exhaust channel is arranged on the side wall of the pilot exhaust seat, the number of explosion-proof surfaces and the design of gas path connecting parts are reduced, and in addition, compared with an exhaust scheme with an upper hole, the size of an explosion-proof shell can be reduced, and the processing precision requirement of part of parts can be reduced;

3. further, through adopting the structure of explosion-proof shell cover cooperation anticreep screw in order to be connected with explosion-proof shell, can reduce the possibility that drops of set screw is lost in use and maintenance process.

4. Furthermore, an outer pilot air inlet and a special air path structure (a pilot air source is independent of a working air source) are arranged, and a sealing gasket is matched, so that the minimum working pressure of the valve body is 0MPa.

Drawings

Fig. 1 is a cross-sectional view of the overall structure of an embodiment of the present invention;

fig. 2 is a view from direction a of fig. 1 according to an embodiment of the present invention;

FIG. 3 is a view from the direction A of FIG. 1 (with the explosion-proof case cover removed) in accordance with an embodiment of the present invention;

FIG. 4 is a view from the direction B of FIG. 1 according to an embodiment of the present invention;

fig. 5 is a first cross-sectional view (i.e., power-off state) of fig. 1 according to an embodiment of the present invention;

fig. 6 is a second cross-sectional view (power-on state) of fig. 1 in an embodiment of the present invention.

Description of reference numerals

10-a valve body; 11-main valve chamber; 12-an air inlet; 13-a first exhaust port; 14-a second exhaust port;

20-valve cover;

30-a guide seat; 31-outer pilot inlet; 32-a mounting cavity;

40-a valve core assembly; 41-a piston; 42-a valve core; 43-a spool support;

50-a pilot exhaust seat; 51-an exhaust channel; 511-a venting cap; 52-an annular groove; 53-an accommodating cavity;

60-an explosion-proof shell; 61-locking holes; 62-locking screws;

70-a movable iron core; 71-pilot gas switching element;

80-a stationary core;

90-a manual switch member;

100-a coil member;

110-a mounting plate;

120-a retaining member;

130-explosion proof shell cover; 131-anti-drop screw;

210-a first resilient member; 220-a second elastic member; 230-a third elastic member; 240-a fourth elastic member; 250-a fifth elastic member; 310-sealing gasket.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description only, and are not used to limit the scope of the present invention, and the relative relationship between the terms may be changed or adjusted without substantial technical changes.

In order to describe the present invention in detail, the two-position five-way pilot-operated explosion-proof solenoid valve of the present invention is specifically described as follows:

referring to fig. 1 to 6, the present invention provides a two-position five-way pilot type explosion-proof solenoid valve, which includes a valve body 10, a pilot seat 30, a pilot exhaust seat 50, an explosion-proof housing 60, a movable iron core 70 and a stationary iron core 80, wherein one end of the valve body 10 is hermetically connected to a valve cover 20; the pilot seat 30 is connected with the other end of the valve body 10 in a sealing manner, and forms a main valve cavity 11 with the valve body 10 and the interior of the valve cover 20, and a valve core assembly 40 which moves back and forth is arranged in the main valve cavity 11; the pilot exhaust seat 50 is vertically connected to the pilot seat 30, and an exhaust passage 51 communicated with the interior of the pilot exhaust seat 50 is formed in the side wall of the pilot exhaust seat 50; the explosion-proof housing 60 is rotatably sleeved on the pilot exhaust seat 50 and is locked or unlocked through a locking structure; the movable iron core 70 is arranged in the explosion-proof shell 60 in a reciprocating manner along the axial direction of the movable iron core 70, and a pilot gas switch 71 is arranged at the front end of the movable iron core 70; the static iron core 80 is installed on the pilot exhaust seat 50 and extends into the explosion-proof housing 60, and is coaxially arranged with the movable iron core 70 and located above the movable iron core 70.

The explosion-proof housing 60 and the pilot exhaust seat 50 adopt a locking connection mode matched with a locking structure, so that the installation is convenient, the axial connection and fixation effects can be achieved, and the rotation of the explosion-proof housing 60 in 360-degree arbitrary directions around the self axial direction can be realized. In addition, the side wall of the pilot exhaust seat 50 is provided with the exhaust channel 51 communicated with the interior of the pilot exhaust seat, the rotary fixing and the exhaust gas path are integrated, the number of explosion-proof surfaces and the design of gas path connecting parts are reduced, and compared with an upper opening exhaust scheme, the size of the explosion-proof shell 60 can be reduced, and the machining precision requirements of part of parts can be reduced.

Specifically, the valve cover 20, the valve body 10 and the pilot seat 30 are connected through screws, one end of the valve body 10 is connected with the valve cover 20 through a sealing ring in a sealing manner, the other end of the valve body 10 is connected with the pilot seat 30 through a sealing ring in a sealing manner, the main valve cavity 11 is formed inside the pilot seat 30, the valve body 10 and the valve cover 20, and the valve core assembly 40 reciprocates in the main valve cavity 11.

The locking structure comprises a first locking part arranged on the pilot exhaust seat 50 and a second locking part arranged on the explosion-proof housing 60, and the second locking part is matched with the first locking part to lock or unlock the explosion-proof housing 60 and the pilot exhaust seat 50. Thus, the first locking part and the second locking part are arranged, so that the explosion-proof housing 60 and the pilot exhaust seat 50 can be matched with each other during assembly, and the explosion-proof housing 60 can freely rotate around the axial direction of the explosion-proof housing 60 by 360 degrees when the explosion-proof housing needs to rotate; at the end of the rotation, the explosion-proof housing 60 and the pilot exhaust seat 50 may be engaged with each other through the first locking portion and the second locking portion to lock the explosion-proof housing 60 and the pilot exhaust seat 50.

In some embodiments, the first locking portion is a ring of annular grooves 52 formed in the circumferential side wall of the pilot vent seat 50, and the second locking portion is a plurality of locking holes 61 formed in the circumferential side wall of the explosion-proof housing 60, and the locking screws 62 are inserted into the locking holes 61 and abut against the annular grooves 52 or are disengaged from the annular grooves 52, so as to lock or unlock the explosion-proof housing 60 and the pilot vent seat 50. Specifically, in this embodiment, the guide exhaust seat 50 includes a middle section and a first exhaust seat section and a second exhaust seat section connected to both ends of the middle section, the first exhaust seat section is connected to the top of the middle section and connected to the explosion-proof housing 60, the second exhaust seat section is connected to the bottom of the middle section and connected to the guide seat 30, and the diameters of the second exhaust seat section, the first exhaust seat section and the middle section are gradually increased. The explosion-proof housing 60 includes a first housing section and a second housing section connected to each other, the first housing section is connected to the bottom of the second housing section, and the diameter of the first housing section is smaller than that of the second housing section. The annular groove 52 is located on the first exhaust seat section side wall of the pilot exhaust seat 50, and is circumferentially arranged one turn around the first exhaust seat section. The locking holes 61 are located on the first shell section of the explosion-proof shell 60 and are uniformly distributed along the circumference. In this embodiment, 3 locking holes 61 are evenly distributed. The first casing section of the explosion-proof casing 60 is sleeved on the first exhaust seat section of the pilot exhaust seat 50, and is inserted into the locking hole 61 through the flat-end locking screw 62 and tightly abutted against the bottom of the annular groove 52 for locking and fixing, so that the explosion-proof casing 60 can freely rotate around the pilot exhaust seat 50, and can be locked and fixed when rotating to a specified angle. And, a sealing ring for sealing is provided between the explosion-proof housing 60 and the pilot exhaust to ensure the sealing property of the connection between the two.

In some embodiments, a receiving cavity 53 is provided between the pilot exhaust seat 50 and the pilot seat 30, an exhaust end of the exhaust channel 51 is located on the annular groove 52, an exhaust cap 511 for preventing external impurities from blocking the exhaust end is provided on the exhaust end, and an air inlet end of the exhaust channel 51 is communicated with the receiving cavity 53. Specifically, the second exhaust seat section of the pilot exhaust seat 50 is detachably connected to the pilot seat 30, and may be in a threaded connection and sealed by a sealing ring. The exhaust end of the exhaust channel 51 is opened on the bottom wall of the annular groove 52, and an exhaust cap 511 is arranged to play a role of blocking. Through the exhaust channel 51, exhaust channeling for the pilot gas is provided. The exhaust channel 51 of the pilot exhaust seat 50 is arranged on the circular groove, so that the number of explosion-proof surfaces and the design of air path connecting parts are reduced, and compared with an exhaust scheme with an upper opening, the size of the explosion-proof shell 60 can be reduced, and the processing precision requirement of part of parts is lower.

In the above embodiment, the pilot air switch 71 moves in the accommodating cavity 53, the pilot air switch 71 forms a plane seal with the pilot exhaust seat 50 and the pilot seat 30 when the plunger 70 reciprocates, and the pilot air switch 71 is sleeved with the first elastic member 210, and the first elastic member 210 is supported between the pilot air switch 71 and the pilot seat 30. Specifically, the pilot gas switch part 71 is arranged on the movable iron core 70 and can move up and down along with the reciprocating of the movable iron core 70, and the top end and the bottom end of the pilot gas switch part 71 respectively form plane sealing with the pilot exhaust seat 50 and the pilot seat 30 under different working states, so that the switching action of the pilot gas is realized, and in this way, on the premise of effectively ensuring the sealing property, the service life of the pilot gas switch part 71 can be prolonged, the service life of the pilot gas switch part is longer, and the cyclic utilization rate of the non-wearing parts can be improved. The first elastic member 210 employs a return spring.

As can be understood, an outer pilot air inlet 31 is formed in the side wall of the pilot seat 30, and the outer pilot air inlet 31 is respectively communicated with the accommodating cavity 53 and the main valve cavity 11; an air inlet 12 and two exhaust ports (herein defined as a first exhaust port 13 and a second exhaust port 14) are opened on the side wall of the valve body 10, and the air inlet 12 and the exhaust ports are both communicated with the main valve chamber 11. Specifically, in this embodiment, the intake port 12 and the first exhaust port 13 are located on one side of the valve body 10, the second exhaust port 14 is located on the opposite side of the intake port 12, and the distances between the second exhaust port 14, the intake port 12, and the first exhaust port 13 and the pilot seat 30 gradually increase. The pilot gas switch 71 follows up and down movement of the iron core 70 in a reciprocating manner, so that the pilot gas switch 71 respectively blocks the outer pilot gas inlet 31 and the exhaust channel 51 under different movement states, and switching of gas paths is realized.

In the above embodiment, the manual switch element 90 is further included, the manual switch element 90 is disposed in the installation cavity 32 inside the pilot seat 30, and is in sealing connection and sliding fit with the installation cavity 32, the outer pilot air inlet 31 is communicated with the installation cavity 32, and the installation cavity 32 is communicated with the accommodating cavity 53 and the main valve cavity 11 respectively; the first end of the manual switch element 90 is sleeved with a second elastic element 220, the second elastic element 220 is supported between the manual switch element 90 and the pilot base 30, and the second end of the manual switch element 90 is close to the outer side wall of the pilot base 30. Specifically, the manual switch element 90 is located in the installation cavity 32, sealed with the installation cavity 32 by a sealing member, and positioned by positioning pins radially penetrating the guide seat 30 and the manual switch element 90. In an emergency state, the electromagnetic valve can be opened through the manual switch member 90, so that the switching of the air passage is realized. The second elastic member 220 is a return spring.

In some embodiments, the front end of the stationary core 80 is connected to the pilot exhaust seat 50, the rear end of the stationary core 80 is sleeved with the coil element 100, the coil element 100 is located in the explosion-proof housing 60 and is connected to the explosion-proof housing 60 through the mounting plate 110, so that the coil element 100 rotates synchronously with the explosion-proof housing 60, the front end of the movable core 70 is sleeved with the third elastic element 230, the third elastic element 230 is supported between the front ends of the movable core 70 and the stationary core 80, and the rear end of the movable core 70 and the stationary core 80 are abutted to the fourth elastic element 240. Specifically, the front end of quiet iron core 80 and the rear end welded connection of quiet iron core 80 are an overall structure, and the front end of quiet iron core 80 is located in the first exhaust seat section of guide's exhaust seat 50 to through threaded connection between with the first exhaust seat section, and be provided with the sealing washer between the front end of quiet iron core 80 and the first exhaust seat section, in order to play sealed effect, provide the condition for moving reciprocating of iron core 70. The coil element 100 is sleeved outside the stationary core 80, and the mounting plate 110 is pressed against the coil element 100 by the locking member 120 (nut and elastic washer) sleeved on the stationary core 80, so as to axially limit the coil element 100. And, coil member 100 is connected with explosion-proof housing 60 through mounting panel 110, coil member 100 links firmly on mounting panel 110, the inside joint of both ends and explosion-proof housing 60 of mounting panel 110, so for relatively static between coil member 100 and the explosion-proof housing 60, make coil member 100 and explosion-proof housing 60 rotate together to avoid producing the interference to coil member 100's wiring in rotatory process. In addition, the third elastic member 230 is sleeved on the front end of the movable iron core 70 to support the movable iron core 70 between the front ends of the static iron cores 80; the rear end of the movable iron core 70 is provided with a mounting groove, and the fourth elastic member 240 is disposed in the mounting groove and supported between the rear end of the movable iron core 70 and the stationary iron core 80. The third elastic member 230 and the fourth elastic member 240 both use a return spring.

In some embodiments, the valve core assembly 40 includes a piston 41, a valve core 42 and a valve core support 43, the valve core support 43 is slidably fitted to the main valve cavity 11 and forms a plurality of sealing cavities, the valve core 42 is connected to the valve core support 43, a first end of the valve core 42 is connected to the piston 41, and a fifth elastic member 250 abuts between a second end of the valve core 42 and the valve cover 20. Specifically, the valve core 42 is located in the middle of the valve core holder 43, and a plurality of seal cavities are formed between the valve core 42, the valve core holder 43 and the valve body 10.

In some embodiments, the explosion-proof housing cover 130 is further included, the explosion-proof housing cover 130 is hermetically disposed on the explosion-proof housing 60, and an anti-drop screw hole is formed in the explosion-proof housing cover 130, and an anti-drop screw 131 is inserted into the anti-drop screw hole to connect the explosion-proof housing cover 130 and the explosion-proof housing 60. Specifically, explosion-proof shell cover 130 is last to be opened there are 4 anticreep screw holes to be located the four corners of explosion-proof shell cover 130, when explosion-proof shell cover 130 and explosion-proof shell 60 cooperation installation, wear to establish through 4 anticreep screws 131 and fix in the explosion-proof screw hole, and still be provided with the sealing washer between explosion-proof shell cover 130 and the explosion-proof shell 60 for guarantee the leakproofness that the two are connected. Thus, the possibility of falling off and losing of the anti-falling screw 131 can be reduced in the using and maintaining processes.

In addition, when an inner pilot is used, pilot gas enters from the gas inlet 12, a communication gas path is formed between the valve body 10 and the pilot seat 30 through the sealing gasket 310, the outer pilot gas inlet 31 and the gas inlet 12 are communicated with each other, a working gas source enters the pilot seat 30 along the gas path, and in a power-on state, only when the pressure reaches a certain value, the piston 41 can be pushed to drive the valve core 42 to move, so that the gas path switching is realized, and the pressure is the minimum working pressure, namely the minimum working pressure exists; when the external pilot is used, firstly, air is introduced from the external pilot air inlet 12, the air path is cut off only by rotating the sealing gasket 310 by 180 degrees between the valve body 10 and the pilot seat 30, at the moment, the external pilot air inlet 31 and the air inlet 12 are respectively two independent air sources, in a power-on state, the air path switching can be realized only by the external pilot air reaching the minimum working pressure, the working air source of the air inlet 12 is not limited, and the minimum working pressure can be 0MPa.

The working process of the two-position five-way pilot-operated explosion-proof electromagnetic valve is as follows:

when the coil element 100 is in a power-off state, the bottom end of the pilot air switch element 71 forms a seal with the pilot seat 30 under the combined action of the first elastic element 210, the third elastic element 230 and the fourth elastic element 240, the outer pilot air inlet 31 is closed, the pilot air outlet (the air outlet end of the air outlet channel 51) is opened, and the piston 41 and the valve core 42 move to the position in the direction close to the pilot seat 30 under the action of the fifth elastic element 250 to form an initial air path; under the action of electromagnetic force between the static iron core 80 and the movable iron core 70, the movable iron core 70 overcomes the acting force of the third elastic member 230 and the fourth elastic member 240 of the spring under the energized state of the coil element 100, the movable iron core 70 moves upwards, the pilot gas switch element 71 also moves upwards to form a seal with the pilot exhaust seat 50 under the action of the first elastic member 210, the outer pilot gas inlet 31 is opened, the pilot exhaust port (the exhaust end of the exhaust channel 51) is closed, and the pilot gas pushes the piston 41 and the valve core 42 to move in place in the direction away from the pilot seat 30 under the action of the fifth elastic member 250, so that the switching of the gas path is realized.

In summary, in the two-position five-way pilot-operated type explosion-proof electromagnetic valve described in the above embodiment, the explosion-proof housing 60 and the pilot exhaust seat 50 are connected and locked by the locking structure, which not only can play a role of connection and fixation and facilitate installation, but also can realize that the explosion-proof housing 60 rotates in any direction of 360 degrees around its own axis; the pilot exhaust seat 50 integrates rotation, locking and a pilot exhaust channel 51, the exhaust channel 51 is arranged on the side wall of the pilot exhaust seat 50, the number of explosion-proof surfaces and the design of air path connecting parts are reduced, and in addition, compared with an exhaust scheme with an upper opening, the size of an explosion-proof shell 60 can be reduced, and the processing precision requirement of part of parts can be reduced; further, by adopting the structure that the explosion-proof shell cover 130 is matched with the anti-drop screw 131 to be connected with the explosion-proof shell 60, the possibility of dropping and losing the fixing screw in the using and maintaining processes can be reduced; further, by arranging the outer pilot air inlet 31 and a special air path structure (the pilot air source and the working air source are independent) and matching with the sealing gasket 310, the minimum working pressure of the valve body can be 0MPa.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. The utility model provides an explosion-proof solenoid valve of two five-way pilot-operated, its characterized in that: comprises that

The valve comprises a valve body, a valve cover and a pilot seat, wherein one end of the valve body is connected with the valve cover in a sealing mode, the other end of the valve body is connected with the pilot seat in a sealing mode, the pilot seat, the valve body and the valve cover form a main valve cavity, and a valve core assembly moving in a reciprocating mode is arranged in the main valve cavity;

the guide exhaust seat is vertically connected to the guide seat, and an exhaust channel communicated with the guide exhaust seat is arranged on the side wall of the guide exhaust seat;

the explosion-proof shell is rotatably sleeved on the pilot exhaust seat and is locked or unlocked through a locking structure;

the movable iron core is arranged in the explosion-proof shell in a reciprocating motion way along the axial direction of the movable iron core, and a pilot gas switch piece is arranged at the front end of the movable iron core; and

and the static iron core is arranged on the pilot exhaust seat, extends into the explosion-proof shell, is coaxially arranged with the movable iron core and is positioned above the movable iron core.

2. The two-position five-way pilot-operated explosion-proof electromagnetic valve according to claim 1, characterized in that: the locking structure comprises a first locking part arranged on the pilot exhaust seat and a second locking part arranged on the explosion-proof shell, and the second locking part is matched with the first locking part to lock or unlock the explosion-proof shell and the pilot exhaust seat.

3. The two-position five-way pilot-operated explosion-proof electromagnetic valve according to claim 2, characterized in that: the first locking portion is a circle of annular grooves formed in the circumferential side wall of the pilot exhaust seat, the second locking portion is a plurality of locking holes formed in the circumferential side wall of the explosion-proof shell, the locking holes are formed in the locking holes in a penetrating mode and are abutted against the annular grooves or are separated from the annular grooves through locking screws, and the explosion-proof shell and the pilot exhaust seat are locked or unlocked.

4. The two-position five-way pilot-operated explosion-proof electromagnetic valve according to claim 3, characterized in that: be provided with the holding chamber between guide's exhaust seat and the guide's seat, exhaust passage's exhaust end is located on the ring channel, just be provided with the air discharge cap that is used for preventing that outside debris from blockking up the exhaust end on the exhaust end, exhaust passage's inlet end with holding chamber intercommunication.

5. The two-position five-way pilot-operated explosion-proof electromagnetic valve according to claim 4, characterized in that: the guide's gas switch spare is in the holding intracavity motion, just guide's gas switch spare respectively with guide's exhaust seat and guide's seat form plane seal when moving iron core reciprocating motion, just the cover is equipped with first elastic component on the guide's gas switch spare, first elastic component support in between guide's gas switch spare and the guide's seat.

6. The two-position five-way pilot-operated explosion-proof electromagnetic valve according to claim 4, characterized in that: an outer pilot air inlet is formed in the side wall of the pilot seat and is respectively communicated with the accommodating cavity and the main valve cavity; an air inlet and two exhaust ports are formed in the side wall of the valve body, and the air inlet and the exhaust ports are communicated with the main valve cavity.

7. The two-position five-way pilot-operated explosion-proof electromagnetic valve according to claim 6, characterized in that: the manual switch piece is arranged in an installation cavity in the pilot base, is connected with the installation cavity in a sealing mode and is in sliding fit with the installation cavity, the outer pilot air inlet is communicated with the installation cavity, and the installation cavity is communicated with the containing cavity and the main valve cavity respectively; the first end cover of manual switch spare is equipped with the second elastic component, the second elastic component supports between manual switch spare and guide seat, the second end of manual switch spare is close to the lateral wall of guide seat.

8. The two-position five-way pilot-operated explosion-proof electromagnetic valve according to claim 1, characterized in that: the front end of quiet iron core connect in on the guide's exhaust seat, the rear end cover of quiet iron core is equipped with coil spare, coil spare is located in the explosion-proof housing to through the mounting panel with explosion-proof housing connects, so that coil spare is along with explosion-proof housing synchronous revolution, the front end cover of moving the iron core is equipped with the third elastic component, just the third elastic component support in move between the front end of iron core and quiet iron core, it has the fourth elastic component to connect to move between the rear end of iron core and the quiet iron core.

9. The two-position five-way pilot-operated explosion-proof electromagnetic valve according to claim 1, characterized in that: the valve core assembly comprises a piston, a valve core and a valve core support, the valve core support is in sliding fit with the main valve cavity and is provided with a plurality of sealing cavities, the valve core is connected to the valve core support, the first end of the valve core is connected with the piston, and a fifth elastic piece is connected between the second end of the valve core and the valve cover in a butting mode.

10. The two-position five-way pilot-operated explosion-proof electromagnetic valve according to claim 1, characterized in that: the explosion-proof shell cover is hermetically arranged on the explosion-proof shell body, an anti-drop screw hole is formed in the explosion-proof shell cover, and the anti-drop screw hole is penetrated through by an anti-drop screw to connect the explosion-proof shell cover and the explosion-proof shell body.

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