A solenoid valve for preventing foreign objects from entering water

Abstract

This utility model discloses a solenoid valve for preventing foreign matter from entering the water, relating to the field of valve technology. The valve includes a valve body, a valve cover, a first valve seat, a valve core, a valve plate, and a drive structure. A valve cavity is formed between the valve body and the valve cover. The valve core is used to connect the inlet and outlet ends of the water. The valve core includes a contact part, on which a first sealing ring is fitted. The projected area of ​​the sealing ring along a plane perpendicular to the valve core axis is larger than that of the contact part. When the valve plate contacts the contact part, the sealing ring contacts the first sealing ring. The drive structure is located on the valve cover, and the drive rod is used to control the movement of the valve plate. When the sealing ring moves up and down with the valve plate, the sealing ring will slide relative to the first sealing ring, thereby causing the first sealing ring to have a scraping effect on the side wall of the sealing ring. This scrapes away foreign matter adhering to the side wall of the sealing ring, preventing foreign matter from entering between the side wall of the first sealing ring and the side wall of the sealing ring, which helps to extend the service life of the equipment using the valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a solenoid valve for preventing foreign objects from entering the water. Background Technology

[0002] When using a water purifier, carbon particles can easily fall off the carbon rod due to the impact of the water flow, causing the inlet solenoid valve to become blocked. In traditional valve structures, the higher the pressure, the deeper the foreign object will become trapped in the sealing ring, which can cause permanent damage to the solenoid valve in the long run. Small foreign objects stuck or accumulating on the sealing surface can easily lead to water leakage. Moreover, when foreign objects fall off, the surface of the sealing ring cannot return to normal, causing the water flow switch control device such as the water dispenser to malfunction, resulting in water overflow and even water damage to the equipment.

[0003] In summary, how to prevent foreign objects from getting stuck in valve seals is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a solenoid valve that prevents foreign objects from entering the water, effectively preventing foreign objects from getting stuck under the sealing ring, and improving the service life and sealing performance of the valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A solenoid valve for preventing foreign objects from entering water includes:

[0007] The valve body and valve cover form a valve cavity between them. The valve body has an inlet end and an outlet end communicating with the valve cavity, and also has a first valve seat.

[0008] A valve core, which is used to connect the inlet end and the outlet end, and is installed on the first valve seat. The valve core includes a contact portion, and a first sealing ring is sleeved on the contact portion.

[0009] A valve plate is provided to seal the valve core. The valve plate is provided with a water sealing ring. The projection of the water sealing ring onto the valve plate is greater than the projection of the contact portion of the valve plate. When the valve plate contacts the contact portion, the water sealing ring contacts the first sealing ring.

[0010] A drive structure is provided on the valve cover, and the drive structure includes a drive rod for controlling the movement of the valve plate.

[0011] Furthermore, the valve body is provided with a second valve seat, which is 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 separate the valve cavity into an upper cavity and a lower cavity. The valve plate also includes a pressure-boosting hole and a pressure-relief hole. The diameter of the pressure-relief hole is larger than the diameter of the pressure-boosting hole. The pressure-boosting hole is used to connect the upper cavity and the lower cavity. When one end of the drive rod contacts the valve plate, the drive rod blocks the pressure-relief hole. When the drive rod is not in contact with the valve plate, the pressure-relief hole is connected to the water outlet.

[0012] Furthermore, the valve core of this invention also includes:

[0013] The mounting part is inserted into the first valve seat and is fixedly connected to the first valve seat;

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

[0015] Furthermore, the contact portion is provided with an annular groove for installing the first sealing ring.

[0016] Furthermore, in this invention, 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 direction of the second valve seat.

[0017] Furthermore, this utility model also includes:

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

[0019] Furthermore, the valve plate is provided with a plurality of fixing posts for fixing the third sealing ring, the fixing posts being evenly distributed on the valve plate, and the pressure-boosting hole penetrating one of the plurality of pressure-boosting holes.

[0020] Furthermore, the end of the drive rod is fitted with a top made of a soft material.

[0021] Furthermore, in this invention, the valve plate has a protrusion on the side opposite to the valve core, the pressure relief hole passes through the protrusion, and the protrusion has a chamfer.

[0022] Furthermore, the driving structure further includes:

[0023] A top spring is mounted on the valve cover and is used to push the drive rod to move towards the valve core;

[0024] An electromagnetic coil is located inside the valve cover and wrapped around the outside of the drive rod, which is made of iron.

[0025] The valve provided by this utility model is used by assembling a valve body and a valve cover, forming a valve cavity between the valve body and the valve cover. The valve body has an inlet end and an outlet end communicating with the valve cavity. A valve core is then installed on a first valve seat. The valve core is used to connect the inlet end and the outlet end, and includes a contact portion with a first sealing ring fitted on it. A sealing ring with a projected area larger than the contact portion is provided on the valve plate. When the valve plate contacts the contact portion, the sealing ring contacts the first sealing ring, thus closing the valve. However, when the valve plate leaves the valve core, the valve is in the open state. The driving structure includes a driving rod, which drives... The rod controls the position of the valve plate. Therefore, when the sealing ring moves up and down with the valve plate, the sealing ring will slide relative to the first sealing ring, which will cause the first sealing ring to scrape against the side wall of the sealing ring. This scrapes away foreign objects adhering to the side wall of the sealing ring, preventing foreign objects from entering between the first sealing ring and the side wall of the sealing ring. This ensures the sealing effect of the first sealing ring, greatly improves the sealing performance of the valve, and prevents the first sealing ring from failing due to foreign objects getting stuck. This significantly extends the service life of the valve and is beneficial to extending the service life of the equipment used with the valve. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 A schematic diagram of the axial side structure of the valve after assembly according to this utility model;

[0028] Figure 2 A schematic diagram of the cross-section of the valve after assembly according to this utility model;

[0029] Figure 3 This is a structural diagram of the valve disassembly provided by this utility model;

[0030] Figure 4 This is a schematic diagram of the valve core provided by this utility model;

[0031] Figure 5 A schematic diagram of the structure of the valve plate and the third sealing ring provided by this utility model;

[0032] Figure 6 This is a schematic diagram of the valve plate provided by the present invention, viewed from a bottom axial side.

[0033] Figure 7 This is a schematic diagram of the internal structure of the valve body provided by this utility model.

[0034] Figures 1-7 In the accompanying drawings, the reference numerals include:

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

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] The core of this utility model is to provide a solenoid valve that prevents foreign objects from entering the water, effectively preventing foreign objects from getting stuck under the sealing ring, thereby improving the service life and sealing performance of the valve.

[0038] Please refer to Figure 2A solenoid valve for preventing foreign objects from entering water includes a valve body 1 and a valve cover 3, with a valve cavity 2 formed between the valve body 1 and the valve cover 3. The valve body 1 has an inlet end 102 and an outlet end 101 communicating with the valve cavity 2. Specifically, the inlet end 102 and the outlet end 101 can be located on the same axis or at a certain angle. The valve body also has a first valve seat 103, in which a valve core 4 is installed. The valve core 4 is used to connect the inlet end 102 and the outlet end 101. The valve core 4 includes a contact portion 401, on which a first sealing ring 5 is sleeved. That is, 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 aligned with the inlet end 102 and the outlet end 101. The axes are not collinear, and the valve core 4 also adopts a cylindrical structure that cooperates with the first valve seat 103. The bottom of the first valve seat 103 is connected to the water outlet 101, and the bottom of the valve core 4 is also connected to the water outlet 101. This allows fluid to enter the valve cavity 2 through the water inlet 102 and flow out to the water outlet 101 through the valve core 4. It also includes a valve plate 6, which is equipped with a water sealing ring. The projection of the water sealing ring 604 onto the valve plate 6 is greater than the projection of the valve core 4 onto 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 cooperates with the contact part 401 of the valve core 4. The valve plate 6 moves up and down within the valve cavity 2. When the valve needs to be closed, this… When the valve plate 6 moves downward, it contacts the valve core 4, thus sealing the valve core 4. At this time, the sealing ring 604 will be fitted over the outside of the contact portion 401 of the valve core 4. A first layer of sealing effect is achieved through the contact between the valve plate 6 and the top of the valve core 4. A second layer of sealing effect is achieved through the sliding contact between the sealing ring 604 and the contact portion 401 of the valve core 4. A third layer of sealing effect is achieved through the contact between the first sealing ring 5 and the sealing ring 604. Under the action of the three layers of sealing effect, the valve is completely closed, greatly improving the sealing performance when the valve is closed. At the same time, through the contact between the sealing ring 604 and the first sealing ring 5, when the sealing ring 604 moves up and down with the valve plate 6, the sealing ring 604 will slide relative to the first sealing ring 5, thus... The first sealing ring 5 has a scraping effect on the side wall of the water sealing ring 604, thereby scraping away foreign objects adhering to the side wall of the water sealing ring 604. This prevents foreign objects from entering between the first sealing ring 5 and the side wall of the water sealing ring 604, ensuring the sealing effect of the first sealing ring 5, greatly improving the valve's sealing performance, and preventing the first sealing ring 5 from failing due to foreign objects getting stuck. This extends the service life of the valve. The valve also includes a drive structure 7, which is located on the valve cover 3. The drive structure 7 includes a drive rod 701, which is used to control the movement of the valve plate 6. In other words, by controlling the movement of the drive rod 701 through the drive structure 7, the movement of the valve plate 6 is controlled, and the movement of the valve plate 6 completes the opening and closing of the valve.

[0039] It should be noted that in this embodiment of the present invention, the valve cover 3 and the valve body 1 are fixedly connected by bolts. The valve cover 3 has an internal sliding channel, and a sealing layer for sealing is provided on the outside of the sliding channel. The drive rod 701 is slidably disposed within the sliding channel.

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

[0041] Optionally, in some embodiments, the valve cavity 2 is an integral cylindrical structure, while the valve plate 6 is a disc-shaped structure that cooperates with the valve cavity 2.

[0042] In use, the valve body 1 and valve cover 3 are assembled, forming a valve cavity 2 between them. The valve body 1 has an inlet end 102 and an outlet end 101 communicating with the valve cavity 2. The valve core 4 is installed on the first valve seat, whereby the valve core 4 is used to connect the inlet end 102 and the outlet end 101. The valve core 4 includes a contact part 401, on which a first sealing ring 5 is fitted. The valve plate 6 has a sealing ring 604 with a projected area larger than that of the contact part 401. When the valve plate 6 contacts the contact part 401, the sealing ring 604 contacts the first sealing ring 5, thus closing the valve. However, when the valve plate 6 leaves the valve core 4, the valve is in the open state. The drive structure 7 includes a drive mechanism. Rod 701, the drive rod 701 can control the position of valve plate 6. Therefore, when the sealing ring 604 moves up and down with valve plate 6, the sealing ring 604 will slide relative to the first sealing ring 5, thereby causing the first sealing ring 5 to have a scraping effect on the side wall of the sealing ring 604. This scrapes away foreign objects adhering to the side wall of the sealing ring 604, preventing foreign objects from entering between the side wall of the first sealing ring 5 and the 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 foreign objects getting stuck in the first sealing ring 5. This significantly improves the service life of the valve and is beneficial to extending the service life of the equipment used in the valve.

[0043] Please refer to Figure 5In some embodiments, a second valve seat 104 is also included, which is installed in the valve cavity 2. The valve plate 6 includes a sealing plate 601 that mates with the second valve seat 104. That is, the valve plate 6 mates with the first valve seat 103. When the valve plate 6 contacts the contact portion 401, the sealing plate 601 mates with the second valve seat 104 to separate 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 an upper cavity 8 and a lower cavity 9. A pressure-boosting hole 606 and a pressure-relief hole 603 are provided on the valve plate 6. The hole of the pressure-relief hole 603 is... The diameter of the pressure relief hole 603 is larger than that of the pressure boosting hole 606. This means the flow velocity in the pressure relief hole 603 is greater than that in the pressure boosting hole 606. When one end of the drive rod 701 contacts the valve plate 6, the drive rod 701 blocks the pressure relief hole 603. At this time, the valve plate 6 is pushed downwards by the drive rod 701, and the fluid enters the upper chamber 8 above the valve plate 6 through the pressure boosting hole 606. When the valve plate 6 is pushed by the drive rod 701 to contact the valve core 4, the sealing plate 601 and the second valve seat 104 are also sealed. At this time, the upper chamber 8 and the lower chamber 9 are connected only through the pressure boosting hole 606. This ensures pressure balance between the upper chamber 8 and the lower chamber 9, reduces the thrust required by the valve plate 6, and further improves the sealing performance when the valve is closed. When the drive rod 701 is not in contact with the valve plate 6, the pressure relief hole 603 is connected to the water outlet 101. That is to say, the drive rod 701 is not fixedly connected to the valve plate 6; the valve plate 6 only slides up and down within the valve chamber 2, while the drive rod 701 can only drive the valve plate 6 to move upward. Therefore, when the drive rod 701 moves upward, the pressure relief hole 603 leaks out and becomes connected to the water outlet 101. At this time, the water in the upper chamber 8 will pass through the pressure relief hole 603. The pressure hole 603 flows to the valve core 4. Since the diameter of the pressure relief hole 603 is larger than that of the pressure boosting hole 606, the flow velocity in the pressure relief hole 603 is greater than that in the pressure boosting hole 606. Therefore, the pressure in the lower chamber 9 is greater than that in the upper chamber 8, which in turn pushes the valve plate 6 upward, thereby raising the valve plate 6 and opening the valve. In the open state, since the flow velocity in the pressure relief hole 603 is greater than that in the pressure boosting hole 606, the pressure in the upper chamber 8 is always less than that in the lower chamber 9. This ensures that the valve plate 6 is always in the top position, improving the stability of the valve when it is open.

[0044] In the above embodiment, the aperture ratio of the pressure relief hole 603 and the pressure boosting hole 606 is 1:0.8-1:0.5. At this aperture ratio, the pressure in the upper chamber 8 can be reduced at a rate that meets 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 on the axial position of the valve plate 6 and is coaxial with the valve core 4 and the drive rod 701. Therefore, when the drive rod 701 pushes the valve plate 6 downward, the end of the drive rod 701 will completely close the pressure relief hole 603.

[0046] Please refer to Figure 4In some embodiments, the valve core 4 further includes a mounting portion 404, which is inserted into the valve seat and fixedly connected to it. Specifically, the mounting portion 404 is used to fix the valve core 4 within the valve seat. The mounting portion 404 is a plurality of arc-shaped support columns evenly distributed along the axis of the valve core 4. Therefore, fluid flows through the gaps between the support columns at the bottom of the valve core 4. The bottom of each support column has a locking protrusion 602, and the bottom of the valve seat has a locking groove that mates with the locking protrusion 602. Therefore, when the valve core 4 is completely within the valve seat, the locking protrusion 602 engages with the locking groove. To fix the valve core 4 to the valve seat and improve the sealing performance of the valve core 4 during installation, a sealing part 403 is also included. The sealing part 403 and the valve seat are in a sealing fit, and a second sealing ring is provided between the sealing part 403 and the valve seat. Specifically, the sealing part 403 is a stepped annular structure located outside the valve core 4, and the valve seat is provided with a sealing groove that mates with the sealing part 403. The second sealing ring is located between the sealing part 403 and the sealing groove. Therefore, when the valve core 4 is fully installed on the valve seat, the sealing part 403 and the sealing groove compress the second sealing ring to ensure the sealing fit between the valve core 4 and the valve seat, and to 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 mounting part 404 and the side wall shape of the valve seat. The annular cavity is coaxially arranged with the valve core 4. Therefore, the valve core 4 does not need to be oriented during installation to meet the requirement of rapid fluid passage, reducing the difficulty of valve assembly.

[0048] Please refer to Figure 4 In some embodiments, the contact portion 401 is provided with an annular groove 402 for installing the first sealing ring 5. That is, the annular groove 402 is provided on the contact portion 401, and the first sealing ring 5 is placed in the annular groove 402 to fix 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 annular groove 402, thus ensuring that the first sealing ring 5 is firmly fitted inside the annular groove 402. Furthermore, when the first sealing ring 5 is not subjected to external force, its outermost diameter is larger than the diameter of the contact portion 401 of the valve core 4. Therefore, when the water sealing ring 604 moves toward the valve core 4 and fits the contact portion 401 inside, the inner wall of the first sealing ring 5 and the water sealing ring 604 will have a scraping effect, thereby ensuring that the contact surface of the first sealing ring 5 and the inner wall of the water sealing ring 604 will not trap foreign objects, 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 sealing ring 604 is chamfered at the end facing the valve core 4. The chamfer helps the sealing ring 604 to press the first sealing ring 5 more smoothly when it comes into contact with the first sealing ring 5. At the same time, the top of the contact part 401 is also chamfered, which helps to make precise fit between it and the sealing ring 604.

[0051] Optionally, in some embodiments, the top of the contact portion 401, the valve plate 6, and the contact portion 401 are all 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 and is 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 allows the sealing plate 601 to have a certain deformation when it moves downward and contacts the second valve seat 104, thus increasing the sealing performance between the sealing plate 601 and the second valve seat 104.

[0053] In the above embodiments, 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 in shape to that of the sealing plate 601, thereby increasing the sealing performance between the sealing plate 601 and the second valve seat 104.

[0055] Please refer to Figure 5 In some embodiments, a third sealing ring 10 is also 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, the sealing performance between the sealing plate 601 and the second valve seat 104 is increased by the third sealing ring 10. When the sealing plate 601 moves toward the second valve seat 104, it squeezes the third sealing ring 10, which greatly improves the sealing effect and ensures the sealing performance between 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 Z-shaped structure, and the opening of the first sealing ring 5 faces the second valve seat 104. Therefore, when the sealing plate 601 compresses the third sealing ring 10, the sealing effect of the third sealing ring 10 can be further improved.

[0057] Please refer to Figure 1In some embodiments, the valve plate 6 is provided with a plurality of fixing posts 605 for fixing the third sealing ring 10. The fixing posts 605 are evenly distributed on the valve plate 6, and the pressure-boosting hole 606 passes through one of the plurality of pressure-boosting holes 606. That is, by setting the fixing posts 605 on the valve plate 6 and setting a plurality of mounting holes on the third sealing ring 10 corresponding to the positions of the fixing posts 605, the third sealing ring 10 is fixed to the valve plate 6 by fitting it onto the fixing posts 605 through the mounting holes, so that the third sealing ring 10 can move up and down with the valve plate 6, thereby 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 greater 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, all sealing rings are made of rubber.

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

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

[0062] Optionally, in some embodiments, in order to further improve the sealing effect of the pressure relief hole 603, a conical or frustum-shaped sealing protrusion 602 is provided at the center of the top head 11. When the top head 11 moves downward, the sealing protrusion 602 first enters the pressure relief hole 603, thereby achieving a primary sealing of the pressure relief hole 603. When the top head 11 is fully in contact with the valve plate 6, a secondary sealing can be performed. Therefore, with two sealing operations, 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 5In some embodiments, the valve plate 6 has a protrusion 602 on the side opposite to the valve core 4, and a pressure relief hole 603 penetrates the protrusion 602. That is, the pressure relief hole 603 is located 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 sealing effect. The protrusion 602 has a chamfer, which can further increase the pressure of the top head 11 on the protrusion 602.

[0064] In the above embodiment, by setting the protrusion 602 and placing the pressure relief hole 603 in the protrusion 602, the support 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 drive 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 drive rod 701 to move towards the valve core 4. The electromagnetic coil 703 is located inside the valve cover 3 and is wrapped around the outside of the drive rod 701. The drive rod 701 is made of iron. That is to say, the drive structure 7 adopts electromagnetic drive. When the electromagnetic coil 703 is energized, the drive rod 701 is driven to move upward to realize the opening of the valve, while the top spring 702 is used to control the drive rod 701 to move downward to realize the closing of the valve.

[0066] In other embodiments, the drive structure 7 also adopts other transmission structures, such as a lead screw drive, with threads on the drive rod 701 and a nut rotatably mounted on the valve cover 3. The movement of the drive rod 701 can be controlled by rotating the nut.

[0067] In other words, the key point of this utility model is that: a first sealing ring 5 is fitted on the contact part 401, the valve plate 6 is located in the valve cavity 2 and can slide in the valve cavity 2 in a preset direction, and 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, thus closing the valve. However, when the valve plate 6 leaves the valve core 4, the valve is in the open state. The driving structure 7 includes a driving rod 701, which can control the position of the valve plate 6. Therefore, the water-sealing ring 604... As the valve plate 6 moves up and down, the sealing ring 604 slides relative to the first sealing ring 5, causing the first sealing ring 5 to scrape against the side wall of the sealing ring 604. This scrapes away foreign objects adhering to the side wall of the sealing ring 604, preventing foreign objects from entering between the first sealing ring 5 and the side wall of the sealing ring 604. This ensures the sealing effect of the first sealing ring 5, greatly improves the valve's sealing performance, and prevents the first sealing ring 5 from becoming stuck with foreign objects, thus significantly extending the service life of the valve and the equipment used with it.

[0068] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0069] The foregoing has provided a detailed description of the anti-foreign-object water inlet solenoid valve provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A foreign matter preventing water inlet electromagnetic valve characterized by comprising: include: The valve body (1) and valve cover (3) are provided, and a valve cavity (2) is formed between the valve body (1) and the valve cover (3). The valve body (1) is provided with an inlet end (102) and an outlet end (101) that communicate with the valve cavity (2), and is also provided with a first valve seat (103). 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 part (401), and the contact part (401) is fitted with a first sealing ring (5). Valve plate (6), the valve plate (6) is used to seal valve core (4), the valve plate (6) is provided with water sealing ring (604), the projection of the water sealing ring (604) onto the valve plate (6) is greater than the projection of the contact part (401) onto 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); A drive structure (7) is provided on the valve cover (3). The drive structure (7) includes a drive rod (701) for controlling the movement of the valve plate (6).

2. The foreign matter intrusion prevention solenoid valve according to claim 1, characterized by The valve body (1) is further provided with a second valve seat (104), which is installed in 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) also includes a pressure boosting hole (606) and a... The pressure relief hole (603) has a larger diameter than the pressure boosting hole (606). The pressure boosting hole (606) is used to connect the upper chamber (8) and the lower chamber (9). When one end of the drive rod (701) is in contact with the valve plate (6), the drive rod (701) blocks the pressure relief hole (603). When the drive 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 foreign matter intrusion prevention solenoid valve according to claim 2, characterized by The valve core (4) also includes: Mounting part (404) is inserted into the first valve seat (103) and fixedly connected to the first valve seat (103); A sealing part (403) is provided, which is in a sealing fit with the first valve seat (103), and a second sealing ring is provided between the sealing part (403) and the first valve seat (103).

4. The foreign matter intrusion prevention solenoid valve according to claim 3, characterized by The contact portion (401) is provided with an annular groove (402) for installing the first sealing ring (5).

5. The foreign matter intrusion prevention solenoid valve according to claim 2, characterized by 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 foreign matter intrusion prevention solenoid valve according to claim 5, characterized by Also includes: 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).

7. The foreign matter intrusion prevention solenoid valve according to claim 6, characterized by The valve plate (6) is provided with a plurality of fixing posts (605) for fixing the third sealing ring (10). The fixing posts (605) are evenly distributed on the valve plate (6), and the pressure boosting hole (606) passes 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, The end of the drive rod (701) is fitted with a head (11) made of soft material.

9. The foreign matter intrusion prevention electromagnetic valve according to any one of claims 2 to 7, characterized by The valve plate (6) has a protrusion (602) on the side opposite to the valve core (4), and the pressure relief hole (603) passes through the protrusion (602). The protrusion (602) has a chamfer.

10. The foreign matter intrusion prevention solenoid valve according to any one of claims 1 to 7, characterized by The drive structure (7) also includes: Top spring (702), the top spring (702) is mounted on the valve cover (3) and is used to push the drive rod (701) to move towards the valve core (4); Electromagnetic coil (703) is located inside the valve cover (3) and wrapped around the outside of the drive rod (701), which is made of iron.

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