Solenoid valve capable of preventing water from entering foreign matters

Abstract

The invention discloses a foreign matter water inflow prevention electromagnetic valve and relates to the technical field of valves.The valve comprises a valve body, a valve deck, a first valve seat, a valve element, a valve plate and a driving structure, a valve cavity is formed between the valve body and the valve deck, the valve element is used for communicating a water inlet end with a water outlet end, the valve element comprises a contact part, and the contact part is sleeved with a first sealing ring; when the valve plate makes contact with the contact part, the water sealing ring makes contact with the first sealing ring, the driving structure is arranged on the valve deck, the driving rod is used for controlling the valve plate to move, and when the water sealing ring moves up and down along with the valve plate, the water sealing ring slides relative to the first sealing ring. And the first sealing ring has a rubbing effect on the side wall of the water sealing ring, so that foreign matters attached to the side wall of the water sealing ring are scraped, the foreign matters are prevented from entering the space between the first sealing ring and the side wall of the water sealing ring, and the service life of equipment used by the valve is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and more specifically, to a foreign object prevention water inlet solenoid valve. Background Art

[0002] When a water purifier is in use, it is very easy for some carbon particles to fall due to the impact of the flow on the carbon rod, resulting in a direct-through phenomenon of the water inlet solenoid valve. For traditional structure valve seals, the higher the pressure of foreign objects, the deeper the foreign objects will be trapped in the seal ring. In the long term, it will cause permanent loss of the solenoid valve. Small foreign objects stuck or piled up on the sealing surface are likely to cause water leakage. And when foreign objects fall, the surface of the seal ring cannot return to normal, resulting in the failure of water flow switch control devices such as pipeline machines, causing water to overflow, and in severe cases, causing problems such as equipment being soaked in water.

[0003] In summary, how to prevent foreign objects from being stuck in the valve seal ring is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a foreign object prevention water inlet solenoid valve, which can effectively avoid foreign objects from being stuck under the seal ring, and improve the service life and sealing performance of the valve.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A foreign object prevention water inlet solenoid valve, comprising:

[0007] A valve body and a valve cover, a valve cavity is formed between the valve body and the valve cover, the valve body is provided with a water inlet end and a water outlet end communicating with the valve cavity, and a first valve seat is also provided.

[0008] A valve core, the valve core is used to conduct the water inlet end and the water outlet end, and is installed on the first valve seat. The valve core includes a contact part, and a first seal ring is sleeved on the contact part.

[0009] A valve plate, the valve plate is used to close the valve core, the valve plate is provided with a water sealing ring, the projection of the water sealing ring on the valve plate is larger than the projection of the contact part on the valve plate. When the valve plate contacts the contact part, the water sealing ring contacts the first seal ring.

[0010] A driving structure, the driving structure is arranged on the valve cover, and the driving structure includes a driving rod, and the driving rod is used to control the movement of the valve plate.

[0011] Further, the valve body of the present invention further includes a second valve seat installed in the valve cavity. The valve plate includes a sealing plate that cooperates with the second valve seat. When the valve plate contacts the contact portion, the sealing plate cooperates with the second valve seat to divide the valve cavity into an upper cavity and a lower cavity. The valve plate further includes a pressure boosting hole and a pressure relief hole, and the aperture of the pressure relief hole is larger than that of the pressure boosting hole. The pressure boosting hole is used to communicate the upper cavity and the lower cavity. When one end of the driving rod contacts the valve plate, the driving rod blocks the pressure relief hole, and when the driving rod does not contact the valve plate, the pressure relief hole communicates with the water outlet end.

[0012] Further, the spool of the present invention further includes:

[0013] An installation part that is inserted into the first valve seat and fixedly connected to the first valve seat;

[0014] A sealing part that is in sealing cooperation with the first valve seat, and a second sealing ring is provided between the sealing part and the first valve seat.

[0015] Further, the contact portion is provided with a ring groove for installing the first sealing ring.

[0016] Further, the sealing plate is an annular plate connected to the valve plate, and the cross-section of the sealing plate is an arc-shaped structure facing the second valve seat.

[0017] Further, the present invention further includes:

[0018] A third sealing ring installed on the valve plate. When the valve plate contacts the spool, the third sealing ring is located between the sealing plate and the second valve seat.

[0019] Further, the valve plate is provided with a plurality of fixing columns for fixing the third sealing ring. The fixing columns are evenly distributed on the valve plate, and the pressure boosting hole penetrates through one of the plurality of pressure boosting holes.

[0020] Further, a top head made of a soft material is installed at the end of the driving rod.

[0021] Further, a protrusion is provided on the side of the valve plate facing away from the spool. The pressure relief hole penetrates through the protrusion, and the protrusion is provided with a chamfer.

[0022] Further, the driving structure further includes:

[0023] A top spring installed on the valve cover and used to push the driving rod to move towards the spool;

[0024] Electromagnetic coil, the electromagnetic coil is arranged inside the valve cover and wound around the outside of the drive rod, and the drive rod is made of iron.

[0025] For the valve provided by the present invention, during use, the valve body and the valve cover are assembled and installed, a valve cavity is formed between the valve body and the valve cover, the valve body is provided with a water inlet end and a water outlet end communicating with the valve cavity, and the valve core is installed on the first valve seat, wherein the valve core is used to conduct the water inlet end and the water outlet end, and the valve core includes a contact part, a first sealing ring is sleeved on the contact part, and a water sealing ring with a projection area larger than that of the contact part is arranged on the valve plate. When the valve plate contacts the contact part, the water sealing ring contacts the first sealing ring, and at this time, the valve is closed. However, when the valve plate leaves the valve core, the valve is in an open state. The driving structure includes a drive rod, and the drive rod can control the position of the valve plate. Therefore, when the water sealing ring moves up and down following the valve plate, relative sliding will occur between the water sealing ring and the first sealing ring, and then the first sealing ring will have a scraping effect on the side wall of the water sealing ring, so as to scrape off the foreign matters adhering to the side wall of the water sealing ring, avoid foreign matters from entering between the side walls of the first sealing ring and the water sealing ring, ensure the sealing effect of the first sealing ring, greatly improve the sealing performance of the valve, and prevent the sealing failure caused by the first sealing ring getting stuck with foreign matters, significantly improve the service life of the valve, and is beneficial to improving the service life of the equipment using the valve. Brief Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0027] Figure 1 It is a schematic axonometric view of the assembled valve provided by the present invention;

[0028] Figure 2 It is a schematic sectional view of the assembled valve provided by the present invention;

[0029] Figure 3 It is a schematic disassembled view of the valve provided by the present invention;

[0030] Figure 4 It is a schematic view of the valve core provided by the present invention;

[0031] Figure 5 It is a schematic view of the valve plate and the third sealing ring provided by the present invention;

[0032] Figure 6 It is a schematic axonometric view of the bottom of the valve plate provided by the present invention;

[0033] Figure 7This is a schematic diagram of the internal structure of the valve body provided by the present invention.

[0034] Figures 1-7 Among them, the reference numerals include:

[0035] 1. Valve body; 101. Water outlet end; 102. Water inlet end; 103. First valve seat; 104. Second valve seat; 2. Valve cavity; 3. Valve cover; 4. Valve core; 401. Contact part; 402. Ring groove; 403. Sealing part; 404. Installation part; 5. First sealing ring; 6. Valve plate; 601. Sealing plate; 602. Protrusion; 603. Pressure relief hole; 604. Water sealing ring; 605. Fixed column; 606. Pressure boosting hole; 7. Driving structure; 701. Driving rod; 702. Top spring; 703. Electromagnetic coil; 8. Upper cavity; 9. Lower cavity; 10. Third sealing ring; 11. Top head. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] The core of the present invention is to provide a foreign object prevention water inlet solenoid valve, which can effectively prevent foreign objects from getting stuck under the sealing ring, and improve the service life and sealing performance of the valve.

[0038] Please refer to Figure 2, A foreign object prevention water inlet solenoid valve, comprising a valve body 1 and a valve cover 3. A valve cavity 2 is formed between the valve body 1 and the valve cover 3. The valve body 1 is provided with a water inlet end 102 and a water outlet end 101 that communicate with the valve cavity 2. Specifically, the water inlet end 102 and the water outlet end 101 can be located on the same axis or have a certain angle. The valve body is further provided with a first valve seat 103. A valve core 4 is installed in the first valve seat 103. The valve core 4 is used to conduct the water inlet end 102 and the water outlet end 101. The valve core 4 includes a contact part 401. A first sealing ring 5 is sleeved on the contact part 401. That is to say, the valve core 4 is installed inside the valve cavity 2 through the first valve seat 103. The first valve seat 103 is cylindrical, and its axis is not collinear with the axes of the water inlet end 102 and the water outlet end 101. The valve core 4 also adopts a cylindrical structure that matches the first valve seat 103. The bottom of the first valve seat 103 communicates with the water outlet end 101, and the bottom of the valve core 4 also communicates with the water outlet end 101. In this way, the fluid enters the valve cavity 2 through the water inlet end 102 and flows out to the water outlet end 101 through the valve core 4. It further includes a valve plate 6. The valve plate 6 is provided with a water sealing ring. The projection of the water sealing ring 604 on the valve plate 6 is larger than the projection of the valve core 4 on the valve plate 6. When the valve plate 6 contacts the contact part 401, the water sealing ring 604 contacts the first sealing ring 5. Specifically, the water sealing ring 604 is a hollow cylinder that matches the contact part 401 of the valve core 4. The valve plate 6 will move up and down in the valve cavity 2. When the valve needs to be closed, at this time, the valve plate 6 will move downward and contact the valve core 4 to block the valve core 4. At this time, the water sealing ring 604 will be sleeved outside the contact part 401 of the valve core 4. Through the contact between the valve plate 6 and the top of the valve core 4, a first layer of sealing effect is achieved. Through the sliding contact between the water sealing ring 604 and the contact part 401 of the valve core 4, a second layer of sealing effect is achieved. Through the contact between the first sealing ring 5 and the water sealing ring 604, a third layer of sealing effect is achieved. Furthermore, under the action of the three-layer sealing effect, the complete closure of the valve is realized, greatly improving the sealing performance of the valve when it is closed. At the same time, through the contact between the water sealing ring 604 and the first sealing ring 5, when the water sealing ring 604 moves up and down with the valve plate 6, relative sliding will occur between the water sealing ring 604 and the first sealing ring 5. As a result, the first sealing ring 5 has a scraping effect on the side wall of the water sealing ring 604, so as to scrape off the foreign objects adhering to the side wall of the water sealing ring 604, preventing foreign objects from entering between the side walls of the first sealing ring 5 and the water sealing ring 604, ensuring the sealing effect of the first sealing ring 5, greatly improving the sealing performance of the valve, and preventing the sealing failure caused by the first sealing ring 5 getting stuck with foreign objects, improving the service life of the valve. And it further includes a driving structure 7. The driving structure 7 is arranged on the valve cover 3. The driving structure 7 includes a driving rod 701. The driving rod 701 is used to control the movement of the valve plate 6. That is to say, by controlling the movement of the driving rod 701 through the driving structure 7, the movement of the valve plate 6 is controlled, and the opening and closing of the valve are achieved by the movement of the valve plate 6.

[0039] It should be noted that in the embodiments of the present invention, the valve cover 3 and the valve body 1 are fixedly connected by bolts. At the same time, a sliding channel is provided inside the valve cover 3, and a sealing layer for closing is provided outside the sliding channel. The driving rod 701 is slidably disposed in the sliding channel.

[0040] Optionally, in some embodiments, the water inlet end 102 and the water outlet end 101 are arranged coaxially, and the valve seat is arranged perpendicular to the axis of the water inlet end 102, that is to say, the whole valve is in a T-shaped structure.

[0041] Optionally, in some embodiments, the valve cavity 2 is integrally of a cylindrical structure, and the valve plate 6 is of a disc-shaped structure matching the valve cavity 2.

[0042] During use, the valve body 1 and the valve cover 3 are assembled and installed. A valve cavity 2 is formed between the valve body 1 and the valve cover 3. The valve body 1 is provided with a water inlet end 102 and a water outlet end 101 communicating with the valve cavity 2. The valve core 4 is installed on the first valve seat, wherein the valve core 4 is used to conduct the water inlet end 102 and the water outlet end 101, and the valve core 4 includes a contact portion 401. A first sealing ring 5 is sleeved on the contact portion 401. A water sealing ring 604 with a projection area larger than that of the contact portion 401 is provided on the valve plate 6. When the valve plate 6 contacts the contact portion 401, the water sealing ring 604 contacts the first sealing ring 5, and at this time the valve is closed. When the valve plate 6 leaves the valve core 4, the valve is in an open state. The driving structure 7 includes a driving rod 701. The driving rod 701 can control the position of the valve plate 6. Therefore, when the water sealing ring 604 moves up and down following the valve plate 6, relative sliding will occur between the water sealing ring 604 and the first sealing ring 5, so that the first sealing ring 5 has a scraping effect on the side wall of the water sealing ring 604, thereby scraping off the foreign matters adhering to the side wall of the water sealing ring 604, preventing foreign matters from entering between the side walls of the first sealing ring 5 and the water sealing ring 604, ensuring the sealing effect of the first sealing ring 5, greatly improving the sealing performance of the valve, and preventing the first sealing ring 5 from being stuck by foreign matters resulting in sealing failure, significantly improving the service life of the valve, which is beneficial to improving the service life of the equipment using the valve.

[0043] Please refer to Figure 5, in some embodiments, it further includes a second valve seat 104. The second valve seat 104 is installed in the valve cavity 2. The valve plate 6 includes a sealing plate 601 that cooperates with the second valve seat 104. That is to say, the valve plate 6 cooperates with the first valve seat 103. When the valve plate 6 contacts the contact part 401, the sealing plate 601 cooperates with the second valve seat 104 to divide the valve cavity 2 into an upper cavity 8 and a lower cavity 9. Therefore, when the valve plate 6 is closed, the valve cavity 2 is divided into the upper cavity 8 and the lower cavity 9. A pressure boosting hole 606 and a pressure relief hole 603 are provided on the valve plate 6. The aperture of the pressure relief hole 603 is larger than that of the pressure boosting hole 606. That is to say, the flow rate of the pressure relief hole 603 is greater than that of the pressure boosting hole 606. And when one end of the driving rod 701 contacts the valve plate 6, the driving rod 701 blocks the pressure relief hole 603. At this time, the valve plate 6 is pushed downward by the driving rod 701, and the fluid will enter the upper cavity 8 above the valve plate 6 through the pressure boosting hole 606. When the valve plate 6 is pushed by the driving rod 701 to contact the valve core 4, the sealing between the sealing plate 601 and the second valve seat 104 is also completed. At this time, the upper cavity 8 and the lower cavity 9 are only connected through the pressure boosting hole 606, ensuring the pressure balance between the upper cavity 8 and the lower cavity 9, reducing the thrust required for the valve plate 6, and further improving the sealing performance when the valve is closed. When the driving rod 701 does not contact the valve plate 6, the pressure relief hole 603 is communicated with the water outlet end 101. That is to say, the driving rod 701 and the valve plate 6 are not fixedly connected. The valve plate 6 only slides up and down in the valve cavity 2, and the driving rod 701 can only drive the valve plate 6 to move upward. Therefore, when the driving rod 701 moves upward, the pressure relief hole 603 is exposed to be communicated with the water outlet end 101. At this time, the water in the upper cavity 8 will flow to the valve core 4 through the pressure relief hole 603. And because the aperture of the pressure relief hole 603 is larger than that of the pressure boosting hole 606, the flow rate of the pressure relief hole 603 is greater than that of the pressure boosting hole 606. Therefore, the pressure in the lower cavity 9 will be greater than that in the upper cavity 8, and then the fluid will push the valve plate 6 upward to lift the valve plate 6, thereby completing the opening of the valve. And in the open state, because the flow rate of the pressure relief hole 603 is greater than that of the pressure boosting hole 606, the pressure in the upper cavity 8 is always less than the pressure in the lower cavity 9. Therefore, it can ensure that the valve plate 6 is always located at the top position, improving the stability when the valve is opened.

[0044] In the above embodiment, the aperture ratio of the pressure relief hole 603 to the pressure boosting hole 606 is 1:0.8 - 1:0.5. At this time, the aperture ratio can make the pressure reduction speed in the upper cavity 8 meet the valve opening speed, that is, the valve opening speed is less than 1 second.

[0045] Optionally, in some embodiments, the pressure relief hole 603 is located at the axis position of the valve plate 6, is coaxial with the valve core 4, and is also coaxial with the driving rod 701. Therefore, when the driving rod 701 pushes the valve plate 6 downward, the end of the driving rod 701 will completely block the pressure relief hole 603.

[0046] Please refer to Figure 4, in some embodiments, the valve core 4 further includes a mounting portion 404. The mounting portion 404 is inserted into the valve seat and fixedly connected to the valve seat. That is to say, the mounting portion 404 is used to fix the valve core 4 within the valve seat. Specifically, the mounting portion 404 is a plurality of support column structures with an arc-shaped cross-section and is evenly distributed along the axis of the valve core 4. Therefore, the bottom of the valve core 4 realizes the fluid circulation through the gaps between the plurality of support columns. The bottom of the support column is provided with a block protrusion 602, and the bottom of the valve seat is provided with a block groove that cooperates with the block protrusion 602. So when the valve core 4 is completely located within the valve seat, the block protrusion 602 is snapped into the block grooves to fix the valve core 4 to the valve seat. At the same time, in order to improve the sealing performance when the valve core 4 is installed, it further includes a sealing portion 403. The sealing portion 403 is in sealing cooperation with the valve seat, and a second sealing ring is provided between the sealing portion 403 and the valve seat. Specifically, the sealing portion 403 is a stepped annular structure provided outside the valve core 4, and the valve seat is provided with a sealing groove that cooperates with the sealing portion 403. The second sealing ring is located between the sealing portion 403 and the mating portion of the sealing groove. So when the valve core 4 is completely installed in the valve seat, the sealing portion 403 and the sealing groove squeeze the second sealing ring to ensure the sealing cooperation between the valve core 4 and the valve seat and ensure the sealing performance when the valve is closed.

[0047] In the above embodiment, the bottom of the valve seat is provided with an annular cavity. The annular cavity is formed by the shape of the mounting portion 404 and the side wall of the valve seat, and the annular cavity is coaxially arranged with the valve core 4. Therefore, the valve core 4 does not need to be directionally installed during installation to meet the rapid passage of fluid, reducing the difficulty of valve assembly.

[0048] Please refer to Figure 4 , in some embodiments, the contact portion 401 is provided with a ring groove 402 for installing the first sealing ring 5. That is to say, the ring groove 402 is provided on the contact portion 401, and the first sealing ring 5 is arranged in the ring groove 402 to realize the fixation of the first sealing ring 5 and effectively prevent the first sealing ring 5 from being displaced.

[0049] In the above embodiment, the diameter of the first sealing ring 5 is smaller than the inner wall diameter of the ring groove 402. Therefore, it can be ensured that the first sealing ring 5 is firmly sleeved in the ring groove 402. And when the first sealing ring 5 is not subjected to external force, the outermost diameter of it is larger than the diameter of the contact portion 401 of the valve core 4. So when the water sealing ring 604 moves towards the valve core 4 and sleeves the contact portion 401 inside, the inner walls of the first sealing ring 5 and the water sealing ring 604 will produce a scraping effect, thereby ensuring that foreign objects will not be stuck on the contact surface between the inner wall of the first sealing ring 5 and the water sealing ring 604, preventing abnormal deformation of the first sealing ring 5, ensuring the service life of the first sealing ring 5, and increasing the service life of the entire valve.

[0050] Optionally, in some embodiments, the inner wall of the water sealing ring 604 is provided with a chamfer at one end facing the valve core 4. The chamfer is beneficial for the water sealing ring 604 to more smoothly extrude the first sealing ring 5 when contacting the first sealing ring 5. At the same time, the top of the contact part 401 is also provided with a chamfer, which is beneficial for the precise fit between it and the water sealing ring 604.

[0051] Optionally, in some embodiments, the top of the contact part 401 and the position where the valve plate 6 contacts the contact part 401 are both smooth surfaces.

[0052] Please refer to Figure 5 , in some embodiments, the sealing plate 601 is an annular plate connected to the valve plate 6. The cross-section of the sealing plate 601 is an arc-shaped structure facing the second valve seat 104. Specifically, the second valve seat 104 is an annular valve seat protruding from the side wall of the valve cavity 2. Therefore, the sealing plate 601 is an annular plate, fixedly connected to the valve plate 6. The cross-section of the sealing plate 601 is an arc-shaped structure facing the second valve seat 104. The arc-shaped structure enables the sealing plate 601 to have a certain amount of deformation when moving downward to contact the second valve seat 104, so the sealing performance between the sealing plate 601 and the second valve seat 104 can be increased.

[0053] In the above embodiment, the sealing plate 601 and the valve plate 6 are integrally formed.

[0054] Optionally, in some embodiments, the contact position between the second valve seat 104 and the sealing plate 601 is provided with an inclined surface similar to its shape, and the sealing performance between the sealing plate 601 and the second valve seat 104 is increased through the inclined surface.

[0055] Please refer to Figure 5 , in some embodiments, a third sealing ring 10 is further included. The third sealing ring 10 is installed on the valve plate 6. When the valve plate 6 contacts the valve core 4, the third sealing ring 10 is located between the sealing plate 601 and the second valve seat 104. That is to say, the sealing performance between the sealing plate 601 and the second valve seat 104 is increased through the third sealing ring 10. When the sealing plate 601 moves towards the second valve seat 104, the third sealing ring 10 is extruded, greatly improving the sealing effect, and further ensuring the sealing of the upper cavity 8 and the lower cavity 9. When the valve plate 6 is opened, the lower cavity 9 can provide a more effective thrust.

[0056] Optionally, in some embodiments, the cross-section of the third sealing ring 10 is a capital "J" - shaped structure, and the opening of the first sealing ring 5 faces the second valve seat 104. Therefore, when the sealing plate 601 extrudes the third sealing ring 10, the sealing effect of the third sealing ring 10 can be further improved.

[0057] Please refer to Figure 1, in some embodiments, a plurality of fixing posts 605 for fixing the third sealing ring 10 are provided on the valve plate 6. The fixing posts 605 are evenly distributed on the valve plate 6. The pressure boosting hole 606 penetrates through one of the plurality of pressure boosting holes 606. That is to say, by providing the fixing posts 605 on the valve plate 6 and providing a plurality of mounting holes corresponding to the positions of the fixing posts 605 on the third sealing ring 10, and sleeving the mounting holes on the fixing posts 605, the third sealing ring 10 is fixed to the valve plate 6, so that the third sealing ring 10 can move up and down with the valve plate 6, further ensuring the effective sealing performance of the third sealing ring 10.

[0058] Optionally, in some embodiments, a limiting block is provided at the end of the fixing post 605. The projected area of the limiting block along the axis of the fixing post 605 is larger than the projected area of the fixing post 605. Therefore, the third sealing ring 10 is installed and fixed by the elastic deformation of the mounting hole.

[0059] In the above embodiments, multiple sealing rings are all made of rubber material.

[0060] Optionally, in some embodiments, in order to further improve the sealing performance of the upper cavity 8, a fixed connection is provided between the side of the third sealing ring 10 away from the valve plate 6 and the side wall of the valve cavity 2. Specifically, a clamping groove is provided on the side wall of the valve cavity 2, and an annular clamping block is provided on the side of the third sealing ring 10 away from the valve plate 6. During use, the clamping block is inserted into the clamping groove to realize the fixed connection between the third sealing ring 10 and the side wall of the valve cavity 2, greatly improving its sealing performance.

[0061] Optionally, in some embodiments, a top head 11 made of a soft material is installed at the end of the driving rod 701. The top head 11 is fixedly installed at the top of the driving rod 701. Specifically, the top head 11 can be made of rubber material. Therefore, after the driving rod 701 moves downward, the top head 11 can more effectively block the pressure relief hole 603, increasing the closing effect on the pressure relief hole 603.

[0062] Optionally, in some embodiments, in order to further improve the closing effect on the pressure relief hole 603, a conical or frustum-shaped plugging protrusion 602 is provided at the center position of the top head 11. When the top head 11 moves downward, the plugging protrusion 602 first enters the pressure relief hole 603 to realize the primary plugging of the pressure relief hole 603. And when the top head 11 is completely in contact with the valve plate 6, secondary plugging can be carried out. Therefore, in the case of two pluggings, the sealing performance of the pressure relief hole 603 is greatly improved, ensuring the overall sealing effect of the valve.

[0063] Please refer to Figure 5, in some embodiments, a protrusion 602 is provided on the side of the valve plate 6 facing away from the valve core 4, and the pressure relief hole 603 penetrates through the protrusion 602. That is to say, the pressure relief hole 603 is provided in the protrusion 602. The protrusion 602 can increase the pressure of the top head 11 on the protrusion 602 by reducing the contact area with the top head 11, thereby improving its further sealing effect. The protrusion 602 is provided with a chamfer, and the chamfer can further increase the pressure of the top head 11 on the protrusion 602.

[0064] In the above embodiment, by providing the protrusion 602 and arranging the pressure relief hole 603 in the protrusion 602, the supportability of the valve plate 6 can be increased, which is beneficial to improving the service life of the valve.

[0065] Please refer to Figure 2 , in some embodiments, the driving structure 7 further includes a top spring 702 and an electromagnetic coil 703. The top spring 702 is installed on the valve cover 3 and is used to push the driving rod 701 in the direction of the valve core 4. The electromagnetic coil 703 is arranged inside the valve cover 3 and wound around the outside of the driving rod 701. The driving rod 701 is made of iron. That is to say, the driving structure 7 adopts electromagnetic drive. When the electromagnetic coil 703 is energized, the driving rod 701 is driven to move upward to open the valve, and the top spring 702 is used to control the downward movement of the driving rod 701 to close the valve.

[0066] In other embodiments, the driving structure 7 also adopts other transmission structures, such as screw drive. A thread is provided on the driving rod 701, and a nut is rotatably installed on the valve cover 3. The movement of the driving rod 701 can be controlled by rotating the nut.

[0067] That is to say, the key point of the present invention is: a first sealing ring 5 is sleeved on the contact part 401. The valve plate 6 is located in the valve cavity 2 and can slide in the valve cavity 2 along a preset direction. A water sealing ring 604 with a projected area larger than that of the contact part 401 is provided on the valve plate 6. When the valve plate 6 contacts the contact part 401, the water sealing ring 604 contacts the first sealing ring 5, and at this time the valve is closed. When the valve plate 6 leaves the valve core 4, the valve is in an open state. The driving structure 7 includes a driving rod 701, and the driving rod 701 can control the position of the valve plate 6. Therefore, when the water sealing ring 604 moves up and down following the valve plate 6, relative sliding will occur between the water sealing ring 604 and the first sealing ring 5, thereby causing the first sealing ring 5 to have a scraping effect on the side wall of the water sealing ring 604, so as to scrape off the foreign matters adhering to the side wall of the water sealing ring 604, prevent foreign matters from entering between the side walls of the first sealing ring 5 and the water sealing ring 604, ensure the sealing effect of the first sealing ring 5, greatly improve the sealing performance of the valve, and prevent the sealing failure caused by the first sealing ring 5 getting stuck with foreign matters, significantly improve the service life of the valve, and is beneficial to improving the service life of the equipment using the valve.

[0068] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the embodiments can be referred to each other.

[0069] The above has introduced in detail a foreign object prevention and water inlet solenoid valve provided by the present invention. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A foreign object prevention water inlet solenoid valve, characterized in that, include: A valve body (1) and a valve cover (3), wherein a valve cavity (2) is formed between the valve body (1) and the valve cover (3), and the valve body (1) is provided with a water inlet end (102) and a water outlet end (101) communicating with the valve cavity (2), and is also provided with a first valve seat (103). A valve core (4), the valve core (4) is used to connect the water inlet end (102) and the water outlet end (101), and is installed on the first valve seat (103), the valve core (4) includes a contact portion (401), and the contact portion (401) is sleeved with a first sealing ring (5); A valve plate (6), the valve plate (6) is used to close the valve core (4), the valve plate (6) is provided with a water sealing ring (604), the projection of the water sealing ring (604) onto the valve plate (6) is larger than the projection of the contact portion (401) onto the valve plate (6), and when the valve plate (6) contacts the contact portion (401), the water sealing ring (604) contacts the first sealing ring (5); A driving structure (7), wherein the driving structure (7) is provided on the valve cover (3), and the driving structure (7) comprises a driving rod (701), and the driving rod (701) is used to control the movement of the valve plate (6).

2. The foreign object prevention water inlet solenoid valve according to claim 1, characterized in that The valve body (1) is further provided with a second valve seat (104), which is mounted on the valve cavity (2). The valve plate (6) includes a sealing plate (601) that cooperates with the second valve seat (104). When the valve plate (6) contacts the contact portion (401), the sealing plate (601) cooperates with the second valve seat (104) to separate the valve cavity (2) into an upper cavity (8) and a lower cavity (9). The valve plate (6) further includes a pressure-boosting hole (606) and a pressure-boosting hole (607). A pressure relief hole (603) having a diameter greater than that of the pressure boost hole (606) is provided. The pressure boost hole (606) is used to connect the upper chamber (8) and the lower chamber (9). When one end of the driving rod (701) contacts the valve plate (6), the driving rod (701) blocks the pressure relief hole (603). When the driving rod (701) is not in contact with the valve plate (6), the pressure relief hole (603) is connected to the water outlet (101).

3. The anti-foreign object water inlet solenoid valve according to claim 2, characterized in that, The valve core (4) further comprises: a mounting portion (404), the mounting portion (404) being inserted into the first valve seat (103) and fixedly connected to the first valve seat (103); A sealing portion (403) is provided, wherein the sealing portion (403) is in sealing cooperation with the first valve seat (103), and a second sealing ring is provided between the sealing portion (403) and the first valve seat (103).

4. The anti-foreign-object water-inlet solenoid valve according to claim 3, wherein The contact portion (401) is provided with an annular groove (402) for mounting the first sealing ring (5).

5. The anti-foreign object water inlet solenoid valve according to claim 2, wherein The sealing plate (601) is an annular plate connected to the valve plate (6), and the cross section of the sealing plate (601) is an arc-shaped structure facing the second valve seat (104).

6. The anti-foreign object water inlet solenoid valve according to claim 5, characterized in that, Also includes: The third sealing ring (10), the third sealing ring (10) is installed on the valve plate (6), and when the valve plate (6) contacts the valve core (4), the third sealing ring (10) is located between the sealing plate (601) and the second valve seat (104).

7. The anti-foreign object water inlet solenoid valve according to claim 6, characterized in that, A plurality of fixing columns (605) for fixing the third sealing ring (10) are provided on the valve plate (6), the fixing columns (605) are uniformly distributed on the valve plate (6), and the pressure boosting hole (606) penetrates through one of the plurality of pressure boosting holes (606).

8. The anti-foreign object water inlet solenoid valve according to any one of claims 1-7, characterized in that A soft material made of a top head (11) is installed at the end of the driving rod (701).

9. The anti-foreign-object water-inlet solenoid valve according to any one of claims 2-7, characterized in that, A protrusion (602) is provided on the side of the valve plate (6) facing away from the valve core (4), the pressure relief hole (603) penetrates through the protrusion (602), and the protrusion (602) is provided with a chamfer.

10. The anti-foreign object water inlet solenoid valve according to any one of claims 1-7, characterized in that, The driving structure (7) further includes: A top spring (702), the top spring (702) is installed on the valve cover (3) and is used to push the driving rod (701) to move in the direction of the valve core (4); An electromagnetic coil (703), the electromagnetic coil (703) is arranged in the valve cover (3) and is wound around the outside of the driving rod (701), and the driving rod (701) is made of iron.

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