High-pollution-resistance two-position five-way electromagnetic valve

Abstract

The utility model provides a highly anti-fouling two-position five-way solenoid valve which comprises a valve body, a valve rod, two guide sleeves, a left valve sleeve assembly and a right valve sleeve assembly, the valve rod is installed in a valve hole of the valve body in a sliding mode, and the valve rod can be switched between a first position and a second position; the two guide sleeves are symmetrically installed at the two ends of the valve hole, and convex rings opposite to the guide sleeves are symmetrically arranged in the valve hole. The left valve sleeve assembly and the right valve sleeve assembly are symmetrically installed on the two sides of the valve rod. The two valve sleeve assemblies each comprise a first valve sleeve capable of abutting against the convex ring, a second valve sleeve capable of abutting against the guide sleeve and an elastic piece abutting against the position between the two valve sleeves. A first end face sealing piece used for pushing the first valve sleeve is installed in the middle of the valve rod, and second end face sealing pieces used for pushing the second valve sleeve are symmetrically installed on the two sides of the valve rod. The high-pollution-resistance two-position five-way electromagnetic valve overcomes the defects that an existing two-position five-way electromagnetic valve is high in part manufacturing precision requirement and poor in pollution resistance.

Description

Technical Field

[0001] The utility model relates to the field of two-position five-way solenoid valves, in particular to a high anti-pollution two-position five-way solenoid valve. Background Art

[0002] In the field of industrial automation control, solenoid valves, as important control components, are widely used in various fluid control systems; two-position five-way solenoid valves are one of the common types. With the continuous improvement of industrial automation, higher requirements are put forward for the performance, reliability, adaptability and intelligent control of two-position five-way solenoid valves.

[0003] Refer to Figure 1 , the existing two-position five-way solenoid valve includes a valve body. A through valve hole is arranged at the central position of the valve body, and interfaces communicating with the valve hole are arranged on the upper and lower sides of the valve body; a valve stem adapted to the valve hole is slidably installed in the valve body, and a plurality of radial seals are installed at intervals along the axial direction on the valve stem. When the interface is switched, sealing is performed by the outer wall of the radial seal abutting against the inner wall of the valve hole; in the above structure, due to its radial sealing method, it has high requirements for the manufacturing precision of product parts, large manufacturing difficulty and high manufacturing cost; in addition, when there is a little impurity in the medium, it is easy to cause the valve stem to be stuck, resulting in the failure of the solenoid valve, and the anti-pollution ability is too poor. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] The problem to be solved by the utility model is to provide a high anti-pollution two-position five-way solenoid valve to overcome the defects of high manufacturing precision requirements for parts of the existing two-position five-way solenoid valve and poor anti-pollution ability.

[0006] (II) Technical Solutions

[0007] To solve the above technical problems, the utility model provides a high anti-pollution two-position five-way solenoid valve, including:

[0008] A valve body, with an A port and a B port arranged on the upper side, and a P port located between the A port and the B port arranged on the lower side;

[0009] A valve stem, slidably installed in the valve hole of the valve body; the valve stem has a first position and a second position and can be switched between the two positions;

[0010] Guide sleeves, symmetrically installed at both ends of the valve hole, and convex rings opposite to the guide sleeves are symmetrically and spaced in the middle of the valve hole;

[0011] The left valve sleeve assembly and the right valve sleeve assembly are symmetrically installed on both sides of the valve stem and are abutted between the guide sleeve and the convex ring; both valve sleeve assemblies include a first valve sleeve that can abut on the convex ring, a second valve sleeve that can abut on the guide sleeve, and an elastic member that abuts between the two valve sleeves; a first end face seal for pushing the first valve sleeve is installed in the middle of the valve stem, and second end face seals for pushing the second valve sleeve are symmetrically installed on both sides thereof;

[0012] When the valve stem is in the first position, the second end face seal abuts on the side end of the second valve sleeve of the right valve sleeve assembly and pushes it away from the guide sleeve to form a first compensation gap, and the first end face seal abuts on the side end of the first valve sleeve of the left valve sleeve assembly and pushes it away from the convex ring to form a second compensation gap. At this time, the P port is communicated with the B port; when the valve stem is in the second position, the second end face seal abuts on the side end of the second valve sleeve of the left valve sleeve assembly and pushes it away from the guide sleeve to form a third compensation gap, and the first end face seal abuts on the side end of the first valve sleeve of the right valve sleeve assembly and pushes it away from the convex ring to form a fourth compensation gap. At this time, the P port is communicated with the A port.

[0013] In some embodiments, the first compensation gap and the second compensation gap are equal, and the third compensation gap and the fourth compensation gap are equal.

[0014] In some embodiments, the elastic member is a spring, and limit grooves for limiting the spring are provided at the side ends of the first valve sleeve and the second valve sleeve; the spring always makes the first valve sleeve tend to move towards the convex ring and always makes the second valve sleeve tend to move towards the guide sleeve; valve sleeve sealing rings are sleeved on the outer circumferential walls of the first valve sleeve and the second valve sleeve, and a guide sleeve sealing ring is sleeved on the outer wall of the guide sleeve.

[0015] In some embodiments, a right end cover is fixed to the right end of the valve body, and a right piston chamber is formed inside the right end cover; the right piston chamber is communicated with the P port and is used to push the valve stem to move towards the left to the first position.

[0016] In some embodiments, a pilot seat is fixed to the left end of the valve body. A left piston chamber is formed in the pilot seat. The force-bearing area of the valve stem in the left piston chamber is larger than that in the right piston chamber. When the left piston chamber is communicated with the P port, under the action of the thrust difference, the valve stem moves towards the right to the second position. An electromagnetic valve is installed on one side of the pilot seat. The electromagnetic valve is used to control the communication or interruption between the left piston chamber and the P port. When the electromagnetic valve is powered on, the left piston chamber is communicated with the P port, and the valve stem switches to the second position. When the electromagnetic valve is powered off, the communication between the left piston chamber and the P port is interrupted, and the valve stem switches to the first position.

[0017] In some embodiments, a manual rod is installed on the pilot seat. The manual rod is used to manually vent the left piston chamber. An anti-blocking gasket is installed in the channel where the P port leads to the left piston chamber.

[0018] In some embodiments, the valve stem includes a left valve stem and a right valve stem that can be inserted into each other. A first Y-shaped ring is sleeved at the end of the left valve stem, and a second Y-shaped ring is sleeved at the end of the right valve stem.

[0019] In some embodiments, the right end cover is hermetically connected to the valve body through an end cover O-ring and an end cover gasket. The pilot seat is hermetically connected to the valve body through a pilot seat O-ring and a pilot seat gasket.

[0020] In some embodiments, an R1 port and an R2 port are provided on the lower side of the valve body. The A port is located between the R1 port and the P port, and the B port is located between the R2 port and the P port. When the valve stem is in the first position, the A port communicates with the R1 port. When the valve stem is in the second position, the B port communicates with the R2 port.

[0021] (III) Beneficial effects

[0022] A two-position five-way solenoid valve with high anti-pollution provided by the present utility model has the following advantages compared with the prior art:

[0023] 1) Through the cooperation of three end face seals and two valve sleeve components, end face seals are used between the first valve sleeve and the convex ring, between the second valve sleeve and the guide sleeve, and between the end face seal and the valve sleeve. The end face seal method replaces the traditional radial seal method, which not only improves the reliability of the seal, has strong anti-pollution ability, but also can reduce the manufacturing precision requirements of product parts, reduce the manufacturing difficulty and manufacturing cost;

[0024] 2) The valve sleeve assembly is composed of a first valve sleeve, an elastic member and a second valve sleeve. When the valve stem switches positions, the end face seal can push the corresponding valve sleeve to generate a compensation gap. On the one hand, the reliability of the seal is improved; on the other hand, the precision requirements of the parts and the production cost are further reduced. In addition, buffer sealing can be achieved during end face sealing, and the spring can also play a role in shock absorption, extending the service life.

[0025] 3) The valve stem adopts a split structure, which is convenient for manufacturing, assembly, and is practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 is a schematic structural diagram of an existing two-position five-way solenoid valve;

[0028] Figure 2 is a schematic structural diagram of a high anti-pollution two-position five-way solenoid valve of the present invention;

[0029] Figure 3 is an exploded view of a high anti-pollution two-position five-way solenoid valve of the present invention;

[0030] Figure 4 is a schematic structural diagram of a high anti-pollution two-position five-way solenoid valve of the present invention when the valve stem switches to the first position;

[0031] Figure 5 is Figure 4 an enlarged view of part A of;

[0032] Figure 6 is Figure 4 an enlarged view of part B of;

[0033] Figure 7 is a schematic structural diagram of a high anti-pollution two-position five-way solenoid valve of the present invention when the valve stem switches to the second position;

[0034] Figure 8 is Figure 7 an enlarged view of part C of;

[0035] Figure 9 is Figure 7 an enlarged view of part D of;

[0036] The component names corresponding to the respective reference numerals in the figures are as follows: 1, valve body; 101, valve hole; 102, convex ring; 2, valve stem; 21, first end face seal; 22, second end face seal; 23, left valve stem; 24, right valve stem; 25, first Y-ring; 26, second Y-ring; 3, guide sleeve; 31, guide sleeve seal ring; 4, left valve sleeve assembly; 41, first valve sleeve; 42, second valve sleeve; 43, elastic member; 44, valve sleeve seal ring; 5, right valve sleeve assembly; 6, right end cover; 61, end cover O-ring; 62, end cover gasket; 601, right piston chamber; 7, pilot seat; 71, manual lever; 72, pilot seat O-ring; 73, pilot seat gasket; 701, left piston chamber; 8, solenoid valve; 9, anti-blocking gasket. Detailed implementation mode

[0037] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] The following illustrates the implementation modes of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of them. The present application can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0039] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. Additionally, this device can be implemented and this method can be practiced using other structures and / or functionality in addition to one or more of the aspects described herein.

[0040] It should also be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present application. The illustrations only show the components related to the present application and are not drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and ratios of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0041] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the examples can be practiced without these specific details.

[0042] The following describes the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.

[0043] Refer to Figures 2 to 9 , the present utility model provides a highly anti-pollution two-position five-way solenoid valve, which includes a valve body 1, a valve stem 2, two guide sleeves 3, a left valve sleeve assembly 4, and a right valve sleeve assembly 5.

[0044] Refer to Figure 2 and Figure 3 , a through valve hole 101 is provided at the center of the interior of the valve body 1. An A port and a B port are provided on the upper side of the valve body 1, and an R1 port, a P port, and an R2 port are provided on the lower side of the valve body 1. The P port is located between the A port and the B port, the A port is located between the R1 port and the P port, and the B port is located between the R2 port and the P port. The valve stem 2 is slidably installed in the valve hole 101 of the valve body 1. The valve stem 2 has a first position and a second position, and the valve stem 2 can be switched between the first position and the second position, so that the P port is communicated with the A port or the B port. The two guide sleeves 3 are symmetrically installed at both ends of the valve hole 101. The guide sleeves 3 are sleeved on the valve stem 2, and the two guide sleeves 3 are respectively located outside the A port and the B port. Two convex rings 102 opposite to the ends of the guide sleeves 3 are symmetrically and spaced in the middle of the valve hole 101. The two convex rings 102 are correspondingly arranged on both sides of the P port, and the convex rings 102 and the valve body 1 are of an integral structure.

[0045] Refer to Figure 2 and Figure 3 , the left valve sleeve assembly 4 and the right valve sleeve assembly 5 are symmetrically installed on both sides of the valve stem 2 and are abutted between the guide sleeve 3 and the convex ring 102. Among them, both valve sleeve assemblies are sleeved on the valve stem 2. The left valve sleeve assembly 4 corresponds to the A port, and the right valve sleeve assembly 5 corresponds to the B port. The left valve sleeve assembly 4 and the right valve sleeve assembly 5 have the same structure, and both include a first valve sleeve 41 that can be abutted against the side end of the convex ring 102, a second valve sleeve 42 that can be abutted against the side end of the guide sleeve 3, and an elastic member 43 abutted between the two valve sleeves. A first end face seal 21 for pushing the first valve sleeve 41 is installed in the middle of the valve stem 2, and second end face seals 22 for pushing the second valve sleeve 42 are symmetrically installed on both sides thereof.

[0046] In this solution, three end face seals and two valve sleeve assemblies are coordinated. End face seals are adopted between the first valve sleeve and the convex ring, between the second valve sleeve and the guide sleeve, and between the end face seal and the valve sleeve. The end face seal replaces the traditional radial seal, which not only improves the sealing reliability and anti-fouling ability, but also reduces the manufacturing precision requirements of product parts, and reduces the manufacturing difficulty and manufacturing cost.

[0047] See also Figures 4 to 6 When the valve stem 2 switches to the first position, the second end face seal 22 on the right side abuts against the side end of the second valve sleeve 42 of the right valve sleeve assembly 5 and pushes it away from the guide sleeve 3 to form a first compensation gap, and the first end face seal 21 abuts against the side end of the first valve sleeve 41 of the left valve sleeve assembly 4 and pushes it away from the convex ring 102 to form a second compensation gap; at this time, the P port is connected to the B port, and the A port is connected to the R1 port, and the gas source of the P port directly enters the external actuator through the B port; the gas at the other end of the actuator enters the A port and is then discharged from the R1 port.

[0048] See also Figures 7 to 9 When the valve stem 2 switches to the second position, the second end face seal 22 on the left side abuts against the side end of the second valve sleeve 42 of the left valve sleeve assembly 4 and pushes it away from the guide sleeve 3 to form a third compensation gap, and the first end face seal 21 abuts against the side end of the first valve sleeve 41 of the right valve sleeve assembly 5 and pushes it away from the convex ring 102 to form a fourth compensation gap. At this time, the P port is connected to the A port, and the B port is connected to the R2 port. The gas source of the P port directly enters the external actuator through the A port; the gas at the other end of the actuator enters the B port and is then discharged from the R2 port.

[0049] In this solution, the valve sleeve assembly is coordinated through the first valve sleeve, the elastic member and the second valve sleeve. When the valve stem switches positions, the end face seal can push the corresponding valve sleeve to produce a compensating gap, which on the one hand improves the reliability of the seal and on the other hand further reduces the precision requirements of the parts and the production cost. In addition, a buffer seal can be achieved when the end face is sealed, and the spring can also play a shock-absorbing role, thereby extending the service life.

[0050] In some embodiments, Figure 5 , Figure 6 , Figure 8 and Figure 9 As shown, the first compensation gap and the second compensation gap are equal, and the third compensation gap and the fourth compensation gap are equal; it is also possible to adopt a method in which the four compensation gaps are equal.

[0051] In some embodiments, Figure 2 and Figure 3As shown, the elastic member 43 is a spring. Limiting grooves for limiting the spring are provided at the side ends of the first valve sleeve 41 and the second valve sleeve 42, which can prevent the spring from shifting, and the use effect is good. The spring always makes the first valve sleeve 41 tend to move towards the convex ring 102, and always makes the second valve sleeve 42 tend to move towards the guide sleeve 3. Valve sleeve sealing rings 44 are sleeved on the outer circumferential walls of the first valve sleeve 41 and the second valve sleeve 42, and a guide sleeve sealing ring 31 is sleeved on the outer wall of the guide sleeve 3. This structure is beneficial to ensuring the sealing performance.

[0052] In some embodiments, as Figures 2 to 4 shown, a right end cover 6 is fixed to the right end of the valve body 1, and a right piston chamber 601 is formed inside the right end cover 6; the right piston chamber 601 is communicated with the P port through a small hole inside the valve body, and the right piston chamber 601 is used to push the valve stem 2 to move towards the left to the first position, where the first position is the left limit of the valve stem 2.

[0053] In some embodiments, as Figure 2 、 Figure 3 and Figure 7 shown, a pilot seat 7 is fixed to the left end of the valve body 1, a left piston chamber 701 is formed inside the pilot seat 7, the force-bearing area of the valve stem 2 placed inside the left piston chamber 701 is larger than the force-bearing area of the valve stem 2 placed inside the right piston chamber 601. When the pressures in the left piston chamber 701 and the right piston chamber 601 are the same, the force on the left end of the valve stem 2 is larger. When both the left piston chamber 701 and the right piston chamber 601 are communicated with the P port, under the action of the thrust difference, the valve stem 2 moves towards the right to the second position, where the second position is the right limit of the valve stem 2.

[0054] In some embodiments, as Figures 2 to 4 and Figure 7 shown, a micro solenoid valve 8 is installed on one side of the pilot seat 7, and the solenoid valve 8 is used to control the communication or interruption between the left piston chamber 701 and the P port. Under normal conditions, the right piston chamber 601 is communicated with the P port; when the solenoid valve 8 is energized, the left piston chamber 701 is communicated with the P port, and the valve stem 2 switches to the second position; when the solenoid valve 8 is de-energized, the communication between the left piston chamber 701 and the P port is interrupted, and the valve stem 2 switches to the first position.

[0055] In some embodiments, as Figure 2 and Figure 3 shown, a manual rod 71 is installed on the pilot seat 7, and the manual rod 71 is used to manually vent the left piston chamber 701. An anti-blocking gasket 9 is installed in the passage from the P port to the left piston chamber 701 to prevent dust from entering the interior of the micro solenoid valve, improve the anti-pollution property, and extend the service life.

[0056] In some embodiments, as Figures 2 to 4As shown, the valve stem 2 includes a left valve stem 23 and a right valve stem 24 that can be inserted into each other. A first Y-ring 25 is sleeved at the end of the left valve stem 23, and a second Y-ring 26 is sleeved at the end of the right valve stem 24. Among them, the first Y-ring 25 is located inside the left piston chamber to ensure the sealing performance of the left piston chamber, and the second Y-ring 26 is located inside the right piston chamber to ensure the sealing performance of the right piston chamber. With this structure, the valve stem 2 adopts a split structure, which is convenient for manufacturing and assembly.

[0057] In some embodiments, such as Figure 4 and Figure 7 As shown, the right end cover 6 is hermetically connected to the valve body 1 through an end cover O-ring 61 and an end cover gasket 62, and the pilot seat 7 is hermetically connected to the valve body 1 through a pilot seat O-ring 72 and a pilot seat gasket 73 to ensure the overall sealing performance.

[0058] For the same or similar parts among the various embodiments in this specification, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0059] As mentioned above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A two-position five-way solenoid valve with high anti-pollution, characterized in that Comprising: A valve body (1) having an A port and a B port provided on its upper side, and a P port provided on its lower side between the A port and the B port; A valve stem (2) slidably installed in a valve hole (101) of the valve body (1); the valve stem (2) has a first position and a second position and can be switched between the two positions; Guide sleeves (3) symmetrically installed at both ends of the valve hole (101), and convex rings (102) opposite to the guide sleeves (3) are symmetrically and spaced in the middle of the valve hole (101); A left valve sleeve assembly (4) and a right valve sleeve assembly (5) symmetrically installed on both sides of the valve stem (2) and abutted between the guide sleeve (3) and the convex ring (102); both valve sleeve assemblies include a first valve sleeve (41) that can abut on the convex ring (102), a second valve sleeve (42) that can abut on the guide sleeve (3), and an elastic member (43) abutted between the two valve sleeves; a first end face seal (21) for pushing the first valve sleeve (41) is installed in the middle of the valve stem (2), and second end face seals (22) for pushing the second valve sleeve (42) are symmetrically installed on both sides thereof; When the valve stem (2) is in the first position, the second end face seal (22) abuts on the side end of the second valve sleeve (42) of the right valve sleeve assembly (5) and pushes it away from the guide sleeve (3) to form a first compensation gap, and the first end face seal (21) abuts on the side end of the first valve sleeve (41) of the left valve sleeve assembly (4) and pushes it away from the convex ring (102) to form a second compensation gap. At this time, the P port is communicated with the B port; when the valve stem (2) is in the second position, the second end face seal (22) abuts on the side end of the second valve sleeve (42) of the left valve sleeve assembly (4) and pushes it away from the guide sleeve (3) to form a third compensation gap, and the first end face seal (21) abuts on the side end of the first valve sleeve (41) of the right valve sleeve assembly (5) and pushes it away from the convex ring (102) to form a fourth compensation gap. At this time, the P port is communicated with the A port.

2. The two-position five-way solenoid valve with high anti-pollution according to claim 1, characterized in that: The first compensation gap and the second compensation gap are equal, and the third compensation gap and the fourth compensation gap are equal.

3. The two-position five-way solenoid valve with high anti-pollution as described in claim 1, characterized in that: The elastic member (43) is a spring, and limit grooves for limiting the spring are provided at the side ends of the first valve sleeve (41) and the second valve sleeve (42); the spring always makes the first valve sleeve (41) tend to move towards the convex ring (102), and always makes the second valve sleeve (42) tend to move towards the guide sleeve (3); valve sleeve sealing rings (44) are sleeved on the outer circumferential walls of the first valve sleeve (41) and the second valve sleeve (42), and a guide sleeve sealing ring (31) is sleeved on the outer wall of the guide sleeve (3).

4. The two-position five-way solenoid valve with high anti-pollution as described in claim 1, characterized in that: A right end cover (6) is fixed to the right end of the valve body (1), and a right piston chamber (601) is formed in the right end cover (6); the right piston chamber (601) is communicated with the P port and is used to push the valve stem (2) to move towards the left to the first position.

5. The two-position five-way solenoid valve with high anti-fouling property according to claim 4, characterized in that: A pilot seat (7) is fixed to the left end of the valve body (1). A left piston chamber (701) is formed in the pilot seat (7). The force-bearing area of the valve stem (2) in the left piston chamber (701) is larger than that in the right piston chamber (601). When the left piston chamber (701) is communicated with the P port, under the action of the thrust difference, the valve stem (2) moves towards the right to the second position.

6. The two-position five-way solenoid valve with high anti-fouling property according to claim 5, characterized in that: An electromagnetic valve (8) is installed on one side of the pilot seat (7). The electromagnetic valve (8) is used to control the communication or interruption between the left piston chamber (701) and the P port. When the electromagnetic valve (8) is energized, the left piston chamber (701) is communicated with the P port, and the valve stem (2) switches to the second position. When the electromagnetic valve (8) is de-energized, the communication between the left piston chamber (701) and the P port is interrupted, and the valve stem (2) switches to the first position.

7. The two-position five-way solenoid valve with high anti-fouling property according to claim 5, characterized in that: A manual lever (71) is installed on the pilot seat (7). The manual lever (71) is used to manually vent the left piston chamber (701). An anti-blocking gasket (9) is installed in the channel through which the P port leads to the left piston chamber (701).

8. The two-position five-way solenoid valve with high anti-pollution as claimed in claim 1, characterized in that: The valve stem (2) includes a left valve stem (23) and a right valve stem (24) that can be inserted into each other. A first Y-shaped ring (25) is sleeved on the end of the left valve stem (23), and a second Y-shaped ring (26) is sleeved on the end of the right valve stem (24).

9. The two-position five-way solenoid valve with high anti-fouling property according to claim 5, characterized in that: The right end cover (6) is hermetically connected to the valve body (1) through an end cover O-ring (61) and an end cover gasket (62). The pilot seat (7) is hermetically connected to the valve body (1) through a pilot seat O-ring (72) and a pilot seat gasket (73).

10. The two-position five-way solenoid valve with high anti-pollution as described in claim 1, characterized in that: An R1 port and an R2 port are arranged on the lower side of the valve body (1). The A port is located between the R1 port and the P port, and the B port is located between the R2 port and the P port. When the valve stem (2) is in the first position, the A port communicates with the R1 port. When the valve stem (2) is in the second position, the B port communicates with the R2 port.

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