Electromagnetic valve with multiple stages of guidance

Abstract

The application provides a multi-section guiding electromagnetic valve, belonging to the technical field of electromagnetic valves, which comprises a valve body, a valve core seat fixedly connected to the top of the valve body, a valve core assembly arranged in the valve core seat, a sealing element, an elastic buffer gasket embedded in the bottom of the sealing element, and a guiding and limiting assembly comprising a plurality of guiding sleeves. During the lifting of the valve core rod, a plurality of interval guiding support points are formed, effectively limiting the lateral freedom of the valve core rod. The lateral support rod extends downward from the bottom of the connecting ring, and the receiving rod fixedly connects the guiding sleeves and the lateral support rod. The lateral support rod and the receiving rod provide stable support force to the guiding sleeves from the side, further enhancing the overall rigidity of the guiding sleeve assembly, avoiding displacement or deformation of the guiding sleeves during long-term reciprocating motion of the valve core rod, effectively suppressing the lateral deflection of the valve core rod, and improving the guiding accuracy and long-term operation reliability of the electromagnetic valve.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve technology, and more specifically to a solenoid valve with multi-stage guidance. Background Technology

[0002] Micro-irrigation technologies such as drip irrigation and micro-sprinkler irrigation can significantly improve irrigation water efficiency and effectively reduce evaporation and deep seepage losses. They are currently recognized as one of the most efficient irrigation methods. Micro-irrigation systems are being rapidly promoted in facility agriculture, fruit tree and cash crop cultivation. The requirements for pressure stability, control accuracy and long-term reliability of system operation are constantly increasing. As a key control component of micro-irrigation systems, the performance of solenoid valves directly affects irrigation accuracy and system stability.

[0003] In related technologies, during the engagement and disengagement process of a solenoid valve, due to the machining and assembly gaps between the valve core and the guide sleeve, the valve core is prone to lateral wobble during axial movement, leading to uneven wear of the guide surface and uneven wear of the sealing pair. After long-term operation, the sealing performance deteriorates, resulting in internal leakage. At the same time, the transient impact of fluid during high-speed closing generates water hammer noise, which is more serious under high-pressure and large-diameter conditions, affecting the service life of the solenoid valve and the reliability of system operation.

[0004] However, although existing technologies guide the valve core by setting up structures such as guide sleeves and guide rings, they are mostly single-segment or integral guides, which do not adequately restrict the lateral freedom of the valve core, and the wobble problem still exists. For the problems of closing impact and noise, they usually rely on electromagnet slow-release circuits or external noise reduction devices to deal with them, which increases the system cost and structural complexity. Therefore, it is necessary to improve the above-mentioned problems. Summary of the Invention

[0005] In view of this, the present invention provides a solenoid valve with multi-stage guidance to solve the technical problems of existing solenoid valves, such as lateral swaying during valve core movement leading to uneven wear of the guide surface and sealing pair, as well as water hammer noise generated by transient fluid impact during high-speed closure.

[0006] To solve the above problems, the solenoid valve with multi-stage guidance provided by the present invention adopts the following technical solution: Includes: a valve body, wherein a valve core seat is fixedly connected to the top of the valve body; A valve core assembly is disposed inside a valve core seat. The valve core assembly includes a seal, an elastic buffer gasket is embedded at the bottom of the seal, a piston is fixedly connected to the top of the seal, a valve core rod is fixedly connected to the top of the piston, a valve core cover is connected to the top flange of the valve core seat, and the valve core rod passes through the inside of the valve core cover and extends upward. A guide limiting assembly includes multiple guide sleeves, which are fitted onto the outer surface of the valve core rod with a precise clearance fit. The multiple guide sleeves are spaced vertically and fixedly connected by a connecting rod. A second connecting rod is fixedly connected to the top of the top guide sleeve, and a connecting ring is fixedly connected to the top of the second connecting rod. The top of the connecting ring is fixedly connected to the valve core cover. A guide rod is fixedly connected to the top edge of the piston, and a guide cylinder is slidably connected to the top of the guide rod. The top of the guide cylinder is fixedly connected to the valve core cover. A valve core spring is sleeved outside the valve core rod and located between the guide sleeve and the guide slide, and is used to provide a restoring force for the valve core assembly.

[0007] Furthermore, a lateral support rod is fixedly connected to the bottom of the connecting ring, and multiple guide sleeves are fixedly connected to the lateral support rod via a receiving rod.

[0008] Furthermore, there are four lateral support rods, which are equidistant from each other in the circumference. There are also several connecting rods and several second connecting rods, which are equidistant from each other in the circumference.

[0009] Furthermore, the inner wall of the guide cylinder is fixedly connected with an arc-shaped protrusion, and the outer surface of the guide rod is provided with a groove that matches the arc-shaped protrusion along the height direction.

[0010] Furthermore, the bottom of the elastic buffer pad is provided with an annular groove, and an elastic sealing layer is fixedly connected to the inner wall of the annular groove.

[0011] Furthermore, the inner wall of the valve body is provided with a valve seat sealing surface, and a sealing convex ring is fixedly connected to the top of the valve seat sealing surface. The sealing convex ring is adapted to the annular groove. A convex pad is fixedly connected to the bottom of the sealing element, and a sealing ring is fixedly connected to the outer circumference of the convex pad. The convex pad can be inserted into the top inner wall edge of the valve seat sealing surface.

[0012] Furthermore, the outer surface of the guide sleeve is coated with a waterproof coating, the outer surface of the waterproof coating is coated with an anti-rust coating, and the sliding surface between the guide sleeve and the valve core rod is coated with a smooth and wear-resistant coating.

[0013] Furthermore, a magnet housing is fixedly connected to the top of the valve core cover, an electromagnet is provided inside the magnet housing, a movable push rod is provided at the top center of the electromagnet, an iron core spring is fixedly connected to the bottom of the movable push rod, a movable iron core is sleeved on the outer surface of the iron core spring, and the movable iron core is sleeved on the top of the valve core rod.

[0014] Furthermore, an inlet and an outlet are respectively provided on both sides of the valve body, and a connecting flange is fixedly connected to the outer surface of both the inlet and the outlet.

[0015] Furthermore, a sealing flange is fixedly connected to the connection between the valve core seat and the valve core cover, and the two sealing flanges are connected by sealing bolts.

[0016] The beneficial effects are: 1. This invention features multiple guide sleeves fitted onto the outer surface of the valve core rod with precise clearance fit. These guide sleeves are spaced vertically and fixedly connected by connecting rods. A connecting ring is fixed to the valve core cover, ensuring the guide sleeves are fixed beneath the valve core cover. This creates multiple spaced guide support points during the valve core rod's lifting and lowering process, effectively limiting the lateral freedom of the valve core rod. Lateral support rods extending downwards from the bottom of the connecting ring, along with receiving rods, fix each guide sleeve to the lateral support rods. The lateral support rods and receiving rods provide stable lateral support to the guide sleeves, further enhancing the overall rigidity of the guide sleeve assembly. This prevents displacement or deformation of the guide sleeves during long-term reciprocating motion of the valve core rod, effectively suppressing lateral sway of the valve core rod, avoiding uneven wear of the guide surface and sealing surfaces, and improving the guiding accuracy and long-term operational reliability of the solenoid valve.

[0017] 2. This invention features a guide rod fixedly connected to the top edge of the piston, with a guide cylinder slidably connected to the top of the guide rod. The guide cylinder is fixed to the valve core cover, and the arc-shaped protrusion on the inner wall of the guide cylinder slides in conjunction with the groove on the outer surface of the guide rod, further guiding and preventing the piston from rotating, thus improving the alignment accuracy between the seal and the valve seat sealing surface. Furthermore, by embedding an elastic buffer pad at the bottom of the seal, when the valve is closed, the elastic buffer pad contacts the valve seat sealing surface and undergoes elastic deformation, absorbing the closing impact energy and effectively reducing water hammer noise.

[0018] 3. This invention achieves a multi-stage sealing structure by matching a sealing convex ring with an annular groove. When the valve is closed, the sealing convex ring inserts into the annular groove and abuts against the elastic sealing layer to form a seal, thereby increasing the stability of the seal and making it more stable when impacted by water flow. The convex pad is inserted into the inner edge of the top of the valve seat sealing surface, and the sealing ring forms an auxiliary seal, ensuring the reliability of the seal when the valve is closed. By setting a waterproof and anti-rust coating on the outer surface of the guide sleeve, moisture is effectively prevented from entering the guide sleeve and causing corrosion. By setting a smooth and wear-resistant coating on the sliding surface, sliding resistance and sliding wear are reduced, extending the service life of the guide sleeve and valve core rod. Attached Figure Description

[0019] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 This is a schematic diagram of the exploded structure of the present invention; Figure 2 This is a schematic diagram of the guide sleeve structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the elastic buffer pad structure of the present invention; Figure 6 This is a schematic diagram of the guide rod structure of the present invention; Figure 7 This is a schematic diagram of the smooth and wear-resistant coating structure of the present invention.

[0020] Explanation of reference numerals in the attached figures: 100. Valve body; 101. Valve core seat; 200. Seal; 201. Piston; 202. Valve core rod; 203. Valve core cover; 300. Guide sleeve; 301. Connecting rod; 302. Second connecting rod; 303. Connecting ring; 304. Lateral support rod; 305. Receiving rod; 306. Guide rod; 307. Guide slide; 308. Arc-shaped protrusion; 309. Slide groove; 400. Valve core spring; 500. Elastic buffer pad; 501. Annular groove; 502, Elastic sealing layer; 503, Valve seat sealing surface; 504, Sealing convex ring; 505, Convex pad layer; 506, Sealing ring; 600, Waterproof coating; 601, Rust-proof coating; 602, Smooth wear-resistant coating; 700, Magnet housing; 701, Electromagnet; 702, Movable push rod; 703, Iron core spring; 704, Movable iron core; 800, Inlet; 801, Outlet; 802, Connecting flange; 900, Sealing flange; 901, Sealing bolt. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] The specific working principle of this invention is as follows: When the present invention is in operation, the electromagnet 701 generates a magnetic force to attract the movable iron core 704 after being energized. The movable iron core 704 is sleeved on the top of the valve core rod 202 and drives the valve core rod 202 to move upward. The valve core rod 202 drives the piston 201 and the sealing element 200 to rise synchronously. The elastic buffer pad 500 and the convex pad layer 505 at the bottom of the sealing element 200 leave the valve seat sealing surface 503. At this time, the valve port opens, and water flows into the valve body 100 through the inlet 800 and flows out from the outlet 801. After the power is turned off, the magnetic force of the electromagnet 701 disappears, and the valve core spring 400 pushes the valve core rod 202. 2. When the valve is reset downwards, the seal 200 descends, the elastic buffer pad 500 abuts against the valve seat sealing surface 503, the sealing convex ring 504 is inserted into the annular groove 501 and abuts against the elastic sealing layer 502 to form a seal, increasing the stability of the seal and making it more stable when impacted by water flow. The convex pad layer 505 is inserted into the top inner wall edge of the valve seat sealing surface 503, and the sealing ring 506 forms an auxiliary seal to achieve reliable closure of the valve port. The elastic buffer pad 500 undergoes elastic deformation when the seal 200 contacts the valve seat sealing surface 503, absorbing the closing impact energy and reducing water hammer noise.

[0023] During the lifting and lowering of the valve core rod 202, multiple guide sleeves 300 slide along the outer surface of the valve core rod 202. Precise clearance fit restricts the lateral freedom of the valve core rod 202. The multiple guide sleeves 300 are distributed vertically at intervals to form multiple guide segments, effectively suppressing lateral sway of the valve core rod 202 and preventing uneven wear of the guide surface and sealing pair. Connecting rod 301 fixes each guide sleeve 300 together. Second connecting rod 302 connects the top guide sleeve 300 to the connecting ring 303. The top of the connecting ring 303 is fixed to the valve core cover 203. Lateral support rod 304 and receiving rod 305 provide stable support to the guide sleeves 300 from the side, ensuring the guide sleeves 300... The positional accuracy of the valve core rod 202 during its lifting and lowering process is improved; at the same time, the guide rod 306 at the top edge of the piston 201 slides along the guide slide 307, and the arc-shaped protrusion 308 slides along the slide groove 309, which further guides and prevents rotation of the piston 201 during its lifting and lowering process, thereby further improving the alignment accuracy between the seal 200 and the valve seat sealing surface 503; the waterproof coating 600 prevents moisture from entering the interior of the guide sleeve 300 and causing rust, the anti-rust coating 601 further enhances the anti-corrosion performance, and the smooth and wear-resistant coating 602 reduces the sliding resistance and sliding wear of the sliding surfaces of the guide sleeve 300 and the valve core rod 202, thereby improving the service life of the guide sleeve 300 and the valve core rod 202.

[0024] The movable iron core 704 is sleeved on the top of the valve core rod 202. When the electromagnet 701 is energized, the movable iron core 704 is attracted upward, driving the valve core rod 202 to open the valve port. After the power is cut off, the movable iron core 704 is reset under the action of the iron core spring 703. The movable push rod 702 guides the lifting and lowering of the movable iron core 704. The magnet housing 700 is fixed on the top of the valve core cover 203 to accommodate the electromagnet 701. The sealing flange 900 and the sealing bolt 901 lock the valve core seat 101 and the valve core cover 203 to ensure the sealing of the connection. The connecting flange 802 connects the valve body 100 to the external pipeline.

[0025] After introducing the basic principles of the present invention, various non-limiting embodiments of the present invention are described in detail below. Any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0026] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0027] An embodiment of the multi-stage guided solenoid valve provided by the present invention: like Figures 1 to 7 As shown, the valve includes a valve body 100, a valve core seat 101 fixedly connected to the top of the valve body 100, and an inlet 800 and an outlet 801 respectively provided on both sides of the valve body 100. A connecting flange 802 is fixedly connected to the outer surface of both the inlet 800 and the outlet 801 for connection to external pipelines.

[0028] The valve core assembly is located inside the valve core seat 101. The valve core assembly includes a seal 200, with an elastic buffer gasket 500 embedded at the bottom of the seal 200. A piston 201 is fixedly connected to the top of the seal 200, and a valve core rod 202 is fixedly connected to the top of the piston 201. A valve core cover 203 is connected to the top flange of the valve core seat 101. Sealing flanges 900 are fixedly connected at the connection between the valve core seat 101 and the valve core cover 203. The two sealing flanges 900 are connected and locked together by sealing bolts 901 to ensure the sealing at the connection between the valve core seat 101 and the valve core cover 203. The valve core rod 202 passes through the inside of the valve core cover 203 and extends upward.

[0029] A magnet housing 700 is fixedly connected to the top of the valve core cover 203. An electromagnet 701 is installed inside the magnet housing 700. A movable push rod 702 is installed at the top center of the electromagnet 701. An iron core spring 703 is fixedly connected to the bottom of the movable push rod 702. A movable iron core 704 is sleeved on the outer surface of the iron core spring 703. The movable iron core 704 is sleeved on the top of the valve core rod 202. When the electromagnet 701 is energized, it attracts the movable iron core 704, which drives the valve core rod 202 to rise and open the valve port. When the power is turned off, the movable iron core 704 is reset under the action of the iron core spring 703.

[0030] The guide limiting assembly includes multiple guide sleeves 300, which are fitted onto the outer surface of the valve core rod 202 with a precise clearance fit to limit the lateral freedom of the valve core rod 202. The multiple guide sleeves 300 are distributed vertically at intervals and are fixedly connected by connecting rods 301 to form a multi-segment guide structure. The top of the top guide sleeve 300 is fixedly connected to a second connecting rod 302, and the top of the second connecting rod 302 is fixedly connected to a connecting ring 303. The top of the connecting ring 303 is fixedly connected to the valve core cover 203, so that the guide sleeve 300 is fixedly fixed below the valve core cover 203.

[0031] The bottom of the connecting ring 303 is fixedly connected to four lateral support rods 304, which are equidistantly distributed circumferentially. Several connecting rods 301 and 302 are also equidistantly distributed circumferentially to provide stable support. Multiple guide sleeves 300 are fixedly connected to the lateral support rods 304 via receiving rods 305. The outer surface of the guide sleeves 300 is coated with a waterproof coating 600 to prevent moisture from penetrating the guide sleeve and causing corrosion. The outer surface of the waterproof coating 600 is coated with an anti-rust coating 601 to further enhance corrosion resistance. The sliding surfaces of the guide sleeves 300 and the valve core rod 202 are coated with a smooth, wear-resistant coating 602 to reduce sliding resistance and wear, thereby improving the service life of the guide sleeves 300 and the valve core rod 202.

[0032] A guide rod 306 is fixedly connected to the top edge of the piston 201. A guide cylinder 307 is slidably connected to the top of the guide rod 306. The top of the guide cylinder 307 is fixedly connected to the valve core cover 203. An arc-shaped protrusion 308 is fixedly connected to the inner wall of the guide cylinder 307. A groove 309 that matches the arc-shaped protrusion 308 is opened on the outer surface of the guide rod 306 along the height direction. When the guide rod 306 rises and falls, the arc-shaped protrusion 308 slides along the groove 309, which guides and prevents the piston 201 from rising and falling, and further improves the alignment accuracy between the seal 200 and the valve seat sealing surface 503.

[0033] The valve core spring 400 is sleeved on the outside of the valve core rod 202 and located between the guide sleeve 300 and the guide slide 307. It is used to provide a reset force for the valve core assembly. After the electromagnet 701 is de-energized, the valve core spring 400 pushes the valve core rod 202 down to close the valve port.

[0034] The bottom of the elastic buffer pad 500 is provided with an annular groove 501. An elastic sealing layer 502 is fixedly connected to the inner wall of the annular groove 501. The inner wall of the valve body 100 is provided with a valve seat sealing surface 503. A sealing convex ring 504 is fixedly connected to the top of the valve seat sealing surface 503. The sealing convex ring 504 is adapted to the annular groove 501. When the valve is closed, the sealing convex ring 504 is inserted into the annular groove 501 and abuts against the elastic sealing layer 502 to form a seal. The bottom of the sealing element 200 is fixedly connected with a convex pad 505. A sealing ring 506 is fixedly connected to the outer circumference of the convex pad 505. The convex pad 505 can be inserted into the top inner wall edge of the valve seat sealing surface 503 to form an auxiliary seal and ensure the sealing reliability when the valve is closed.

[0035] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0036] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A solenoid valve with multi-stage guidance, characterized in that, include: A valve body (100) has a valve core seat (101) fixedly connected to its top. A valve core assembly is disposed inside a valve core seat (101). The valve core assembly includes a seal (200), an elastic buffer gasket (500) is embedded at the bottom of the seal (200), a piston (201) is fixedly connected to the top of the seal (200), a valve core rod (202) is fixedly connected to the top of the piston (201), a valve core cover (203) is connected to the top flange of the valve core seat (101), and the valve core rod (202) passes through the inside of the valve core cover (203) and extends upward. A guide limiting assembly includes multiple guide sleeves (300), which are fitted onto the outer surface of the valve core rod (202) with a precise clearance fit. The multiple guide sleeves (300) are distributed vertically at intervals and are fixedly connected by connecting rods (301). The top of the top guide sleeve (300) is fixedly connected to a second connecting rod (302), and the top of the second connecting rod (302) is fixedly connected to a connecting ring (303). The top of the connecting ring (303) is fixedly connected to the valve core cover (203). The piston (201) has a guide rod (306) fixedly connected to its top edge, and a guide cylinder (307) is slidably connected to the top of the guide rod (306). The top of the guide cylinder (307) is fixedly connected to the valve core cover (203). A valve core spring (400) is sleeved on the outside of the valve core rod (202) and located between the guide sleeve (300) and the guide slide (307) to provide a restoring force to the valve core assembly.

2. The solenoid valve with multi-stage guidance according to claim 1, characterized in that, The bottom of the connecting ring (303) is fixedly connected to a lateral support rod (304), and multiple guide sleeves (300) are fixedly connected to the lateral support rod (304) through a receiving rod (305).

3. The solenoid valve with multi-stage guidance according to claim 2, characterized in that, The number of the lateral support rods (304) is four, and the four lateral support rods (304) are equidistantly distributed around the circumference. The number of the connecting rods (301) and the second connecting rods (302) is also several, and the several connecting rods (301) and the second connecting rods (302) are equidistantly distributed around the circumference.

4. The solenoid valve with multi-stage guidance according to claim 1, characterized in that, The inner wall of the guide slide (307) is fixedly connected with an arc-shaped protrusion (308), and the outer surface of the guide rod (306) is provided with a groove (309) that matches the arc-shaped protrusion (308) along the height direction.

5. The solenoid valve with multi-stage guidance according to claim 1, characterized in that, The bottom of the elastic buffer pad (500) is provided with an annular groove (501), and an elastic sealing layer (502) is fixedly connected to the inner wall of the annular groove (501).

6. The solenoid valve with multi-stage guidance according to claim 5, characterized in that, The valve body (100) has a valve seat sealing surface (503) on its inner wall. A sealing ring (504) is fixedly connected to the top of the valve seat sealing surface (503). The sealing ring (504) is adapted to the annular groove (501). A convex pad (505) is fixedly connected to the bottom of the sealing element (200). A sealing ring (506) is fixedly connected to the outer circumference of the convex pad (505). The convex pad (505) can be inserted into the top inner wall edge of the valve seat sealing surface (503).

7. The solenoid valve with multi-stage guidance according to claim 1, characterized in that, The outer surface of the guide sleeve (300) is coated with a waterproof coating (600), the outer surface of the waterproof coating (600) is coated with an anti-rust coating (601), and the sliding surface of the guide sleeve (300) and the valve core rod (202) is coated with a smooth and wear-resistant coating (602).

8. The solenoid valve with multi-stage guidance according to claim 1, characterized in that, A magnet housing (700) is fixedly connected to the top of the valve core cover (203). An electromagnet (701) is provided inside the magnet housing (700). A movable push rod (702) is provided at the top center of the electromagnet (701). An iron core spring (703) is fixedly connected to the bottom of the movable push rod (702). A movable iron core (704) is sleeved on the outer surface of the iron core spring (703). The movable iron core (704) is sleeved on the top of the valve core rod (202).

9. The solenoid valve with multi-stage guidance according to claim 1, characterized in that, The valve body (100) is provided with an inlet (800) and an outlet (801) on both sides, and a connecting flange (802) is fixedly connected to the outer surface of the inlet (800) and the outlet (801).

10. The solenoid valve with multi-stage guidance according to any one of claims 1 to 9, characterized in that, The valve core seat (101) and the valve core cover (203) are both fixedly connected with sealing flanges (900), and the two sealing flanges (900) are connected by sealing bolts (901).

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