Anti-freezing electromagnetic valve

Abstract

The utility model discloses an anti-freezing electromagnetic valve which comprises a valve body, an upper channel, a lower channel and a longitudinal channel are formed in the valve body, the upper channel and the lower channel extend transversely, the longitudinal channel extends in the longitudinal direction and is communicated with the upper channel and the lower channel, and an upper stopping face for stopping from top to bottom is formed on the longitudinal channel below the upper channel. An upper stop surface is formed on the longitudinal channel, an upper valve port is formed on the longitudinal channel corresponding to the inner side of the upper stop surface, a lower stop surface for stopping from bottom to top is formed on the longitudinal channel above the lower channel, a lower valve port is formed on the longitudinal channel corresponding to the inner side of the lower stop surface, the upper stop surface is located above the lower stop surface, and the electromagnetic valve further comprises a sliding pin, a valve bonnet, a valve rod, a valve plug, an armature, a filter casing and a reset spring. According to the electromagnetic valve, the longitudinal channel is matched with the sliding pin, the valve bonnet, the valve rod and the valve plug, so that the viscous condition caused by engine oil among the longitudinal channel, the sliding pin, the valve bonnet, the valve rod and the valve plug is reduced, the action of the electromagnetic valve is more sensitive, and the probability that the valve plug is frozen below a lower valve port in a cold environment, so that the electromagnetic valve is in a normally open state is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines, and particularly relates to an anti-freezing solenoid valve. Background Art

[0002] For the existing solenoid valve, when power is off and the engine stops, if there is no oil pressure, the solenoid valve is in a connected state. If the engine stops for a long time in a cold environment, the internal parts of the solenoid valve may freeze and stick, and the solenoid valve may be in an always-open state. In this case, at the initial stage of engine startup, the solenoid valve cannot work properly. Summary of the Invention

[0003] The purpose of the utility model is to provide an anti-freezing solenoid valve, which is more sensitive in action and reduces the probability that the valve plug freezes below the lower valve port in a cold environment, resulting in the solenoid valve being in an always-open state.

[0004] To achieve the above object, the technical solution adopted by the utility model is: an anti-freezing solenoid valve, which comprises a valve body. A horizontally extending upper channel and a lower channel are formed in the valve body, and a longitudinally extending longitudinal channel that communicates with both the upper channel and the lower channel. An upper stop surface that stops from top to bottom is formed on the longitudinal channel below the upper channel. The longitudinal channel corresponding to the inner side of the upper stop surface forms an upper valve port. A lower stop surface that stops from bottom to top is formed on the longitudinal channel above the lower channel. The longitudinal channel corresponding to the inner side of the lower stop surface forms a lower valve port. The upper stop surface is located above the lower stop surface. The solenoid valve further comprises a sliding pin penetrating through the upper part of the longitudinal channel, a valve cap fixed to the lower end of the sliding pin and placed on the upper stop surface and capable of covering the upper valve port, a valve rod connected to the lower end of the valve cap and located in the lower part of the longitudinal channel, a valve plug fixedly sleeved on the valve rod and below the lower stop surface, an armature installed on the valve body and used to drive the sliding pin to move upward, a filter cover fixedly covering the lower end of the longitudinal channel, and a return spring sleeved on the lower end of the valve rod and located between the filter cover and the valve cap. When the solenoid valve is energized, the armature drives the sliding pin to move upward with the assistance of the return spring. The sliding pin finally drives the valve plug to move upward below the lower stop surface and block the lower valve port through the valve cap and the valve rod. The lower valve port is closed, the valve cap leaves the upper stop surface, and the upper valve port is opened.

[0005] In another embodiment, the longitudinal channel includes a first channel section extending from the upper end face of the valve body to the upper channel, a second channel section and a third channel section below the upper channel, a fourth channel section below the upper valve port and above the lower channel, a fifth channel section above the lower channel and above the lower valve port, and a fifth channel section and a sixth channel section below the lower valve port. The first channel section, the second channel section, the third channel section, the fourth channel section, the fifth channel section, and the sixth channel section are connected in sequence from top to bottom. The upper valve port is formed on the splicing surface of the third channel section and the fourth channel section, and the lower valve port is formed on the splicing surface of the fourth channel section and the fifth channel section.

[0006] In another embodiment, the sliding pin can move within the first channel section and is sealingly connected to the inner wall of the first channel section.

[0007] In another embodiment, the diameter of the second channel section is smaller than that of the third channel section, and the upper end of the second channel section is connected to the upper channel.

[0008] In another embodiment, the valve cap is located within the third channel section, and the diameter of the valve cap is smaller than that of the third channel section.

[0009] In another embodiment, the valve plug is located within the fifth channel section, and its upper end is in the shape of a frustum of a cone. When it moves upward and blocks the lower valve port, at least a part of its upper end is located within the fourth channel section. The diameter of the valve plug is smaller than that of the fifth channel section.

[0010] In another embodiment, the return spring is located within the sixth channel section, and the diameter of the sixth channel section is larger than that of the fifth channel section.

[0011] In another embodiment, a convex platform for assisting in positioning the return spring is provided on the upper end face of the filter cover, and the lower end of the return spring is sleeved on the convex platform.

[0012] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art: Through the matching of the longitudinal channel with the sliding pin, valve cap, valve stem, and valve plug, the viscosity caused by engine oil between the longitudinal channel and the sliding pin, valve cap, valve stem, and valve plug is reduced, making the operation of the solenoid valve more sensitive, reducing the probability that the valve plug freezes below the lower valve port in a cold environment and causing the solenoid valve to be in an open state; Using the return spring to assist the valve plug to reset upward further reduces the probability that the solenoid valve is in an open state and ensures that the solenoid valve can work properly at any time; At the same time, a convex platform is provided on the solenoid valve filter screen cover to increase the positioning stability of the return spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the anti-freeze solenoid valve when the lower valve port is closed;

[0014] Figure 2 It is a schematic structural diagram of an anti-freezing solenoid valve when the lower valve port is open. Specific embodiments

[0015] The following further describes the present utility model in conjunction with the embodiments shown in the accompanying drawings.

[0016] As Figure 1-2 shown, the anti-freezing solenoid valve includes a valve body 1. A horizontally extending upper channel 11 and a lower channel 12 are formed in the valve body 1, and a longitudinal channel extending longitudinally and communicating with both the upper channel 11 and the lower channel 12. An upper stop surface A that stops from top to bottom is formed on the longitudinal channel below the upper channel 11. The longitudinal channel corresponding to the inner side of the upper stop surface A forms an upper valve port C. A lower stop surface B that stops from bottom to top is formed on the longitudinal channel above the lower channel 12. The longitudinal channel corresponding to the inner side of the lower stop surface B forms a lower valve port D. The upper stop surface A is located above the lower stop surface B;

[0017] The solenoid valve further includes a sliding pin 3 passing through the upper part of the longitudinal channel, a valve cap 4 fixed to the lower end of the sliding pin 3 and placed on the upper stop surface A and capable of covering the upper valve port C, a valve stem 5 connected to the lower end of the valve cap 4 and located in the lower part of the longitudinal channel, a valve plug 6 fixedly sleeved on the valve stem 5 and below the lower stop surface B, an armature 2 installed on the valve body 1 and used to drive the sliding pin to move upward, a filter cover fixedly covering the lower end of the longitudinal channel, and a return spring 7 sleeved on the lower end of the valve stem 5 and located between the filter cover and the valve cap 4.

[0018] The longitudinal channel includes a first channel section 81 extending from the upper end face of the valve body 1 to the upper channel 11, a second channel section 82 and a third channel section 83 below the upper channel 11, a fourth channel section 84 below the upper valve port C and above the lower channel 12, a fifth channel section 85 above the lower channel 12 and above the lower valve port D, a fifth channel section 85 below the lower valve port D and a sixth channel section 86. The first channel section 81, the second channel section 82, the third channel section 83, the fourth channel section 84, the fifth channel section 85, and the sixth channel section 86 are connected in sequence from top to bottom. The upper valve port C is formed on the splicing surface of the third channel section 83 and the fourth channel section 84, and the lower valve port D is formed on the splicing surface of the fourth channel section 84 and the fifth channel section 85. Specifically, the positional and dimensional relationships between each channel section and the valve stem 5, the valve cap 4, and the sliding pin 3 are as follows: The sliding pin can move within the first channel section 81 and is hermetically connected to the inner wall of the first channel section 81; the diameter of the second channel section 82 is smaller than that of the third channel section 83, and the upper end of the second channel section 82 is connected to the upper channel 11; the valve cap 4 is located within the third channel section 83, and the diameter of the valve cap 4 is smaller than that of the third channel section 83; the valve plug 6 is located within the fifth channel section 85, the upper end thereof is in a frustum shape, and when it moves upward and blocks the lower valve port D, at least part of its upper end portion is located within the fourth channel section 84, and the diameter of the valve plug 6 is smaller than that of the fifth channel section 85; the return spring 7 is located within the sixth channel section 86, and the diameter of the sixth channel section 86 is larger than that of the fifth channel section 85.

[0019] To increase the positioning stability of the return spring 7, a boss 80 for assisting in positioning the return spring 7 is provided on the upper end face of the filter cover 8, and the lower end portion of the return spring 7 is sleeved on the boss 80.

[0020] The principle of the present utility model is as follows: When the solenoid valve is powered off, the return spring 7 will push the valve plug 6, as well as the valve stem 5, the valve cap 4, the sliding pin 3, and the armature 2 upward; the upper end portion of the valve plug 6 contacts the lower stop surface B of the valve body 1, and the lower valve port D is in a closed state. Thus, when powered off, the solenoid valve is in a closed state. Even if the internal parts of the solenoid valve are frozen and adhered to the Figure 1 closed state shown, when the solenoid valve is powered on, the electromagnetic force acting on the armature is sufficient to push the armature 2, as well as the sliding pin 3, the valve cap 4, the valve stem 5, and the valve plug 6, to open the solenoid valve and reach the Figure 2 open state. After power-off, the return spring 7 will reset the solenoid valve to the closed state.

[0021] The above embodiments are only for illustrating the technical concept and features of the present utility model, and the purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. It should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. An anti-freeze solenoid valve, characterized in that: It includes a valve body, in which a horizontally extending upper channel and a lower channel, and a longitudinally extending longitudinal channel communicating with both the upper channel and the lower channel are formed. An upper stop surface that stops from top to bottom is formed on the longitudinal channel below the upper channel. An upper valve port is formed in the longitudinal channel corresponding to the inner side of the upper stop surface. A lower stop surface that stops from bottom to top is formed on the longitudinal channel above the lower channel. A lower valve port is formed in the longitudinal channel corresponding to the inner side of the lower stop surface. The upper stop surface is located above the lower stop surface. The solenoid valve further includes a sliding pin penetrating through the upper part of the longitudinal channel, a valve cap fixed to the lower end of the sliding pin and placed on the upper stop surface and capable of covering the upper valve port, a valve stem connected to the lower end of the valve cap and located in the lower part of the longitudinal channel, a valve plug fixedly sleeved on the valve stem and below the lower stop surface, an armature installed on the valve body and used to drive the sliding pin to move upward, a filter cover fixedly covering the lower end of the longitudinal channel, and a return spring sleeved on the lower end of the valve stem and located between the filter cover and the valve cap.

2. The anti-freezing solenoid valve according to claim 1, wherein: The longitudinal channel includes a first channel section extending from the upper end surface of the valve body to the upper channel, a second channel section, a third channel section below the upper channel, a fourth channel section below the upper valve port and above the lower channel, a fifth channel section above the lower channel and above the lower valve port, a fifth channel section below the lower valve port, and a sixth channel section. The first channel section, the second channel section, the third channel section, the fourth channel section, the fifth channel section, and the sixth channel section are connected in sequence from top to bottom. The upper valve port is formed on the splicing surface of the third channel section and the fourth channel section, and the lower valve port is formed on the splicing surface of the fourth channel section and the fifth channel section.

3. The antifreeze solenoid valve according to claim 2, wherein: The sliding pin can move in the first channel section and is hermetically connected to the inner wall of the first channel section.

4. The anti-freezing solenoid valve according to claim 2, wherein: The diameter of the second channel section is smaller than that of the third channel section, and the upper end of the second channel section is connected to the upper channel.

5. The antifreeze solenoid valve according to claim 2, characterized in that: The valve cap is located in the third channel section, and the diameter of the valve cap is smaller than that of the third channel section.

6. The anti-freezing solenoid valve according to claim 2, wherein: The valve plug is located in the fifth channel section, and its upper end is in a frustum shape. When it moves upward and blocks the lower valve port, at least part of its upper end is located in the fourth channel section. The diameter of the valve plug is smaller than that of the fifth channel section.

7. The anti-freezing solenoid valve according to claim 2, wherein: The return spring is located in the sixth channel section, and the diameter of the sixth channel section is larger than that of the fifth channel section.

8. The anti-freezing solenoid valve according to claim 1, wherein: A boss for assisting in positioning the return spring is provided on the upper end surface of the filter cover, and the lower end of the return spring is sleeved on the boss.

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