A detachable electromagnetic drain valve

Abstract

The utility model relates to a detachable electromagnetic drain valve convenient to maintain, which comprises a valve body, a main valve core, an auxiliary valve core and a coil. The main valve core comprises a valve core body and a valve core rod. The valve body has a main valve core chamber and an auxiliary valve core chamber. The main valve core is located in the main valve core chamber, and the auxiliary valve core is located in the auxiliary valve core chamber. The valve body has a water passage hole connecting the main valve core chamber and the auxiliary valve core chamber. The valve core rod is located in the water passage hole. The valve body is provided with a detachable limiting ring. The limiting ring is located above the valve core body. A spring is arranged between the valve core body and the limiting ring. The limiting ring has a fracture. The valve body is provided with a first annular groove. The limiting ring is clamped in the first annular groove. The detachable electromagnetic drain valve is convenient to maintain, and can significantly reduce the cost of users and after-sales service.

Description

Technical Field

[0001] This utility model relates to a drain valve, specifically an electromagnetic drain valve for use on heavy-duty vehicles for discharging waste liquid from wet tanks and gas storage cylinders. Background Technology

[0002] An electromagnetic drain valve is a type of valve that drains water through electromagnetic control, suitable for draining wet tanks or air cylinders in automobiles. A utility model patent (publication number: CN204477319U) entitled "An Electromagnetic Drain Valve for a Heavy-Duty Automobile Air Cylinder" discloses a drain valve (also called a drain valve). The electromagnetic drain valve claimed in this patent includes a valve body, main and auxiliary valve cores, and an electromagnetic coil. The valve body has a valve core seat with a water outlet channel. The lower end of the main valve core has a top post that passes through the water outlet channel. A positioning plate is located above the main valve core, and an elastic element is located between the positioning plate and the upper end of the main valve core. When the electromagnetic coil is energized, it drives the auxiliary valve core upwards against the top post, compressing the elastic element. Because a drain groove is carved on the outer surface of the auxiliary valve core or on the valve wall of the valve cavity where the auxiliary valve core is located, wastewater and particulate impurities enter through the water outlet channel and are discharged through the drain groove and drain hole. The drain groove not only solves the problem of easy clogging and air leakage of the valve core but also greatly increases the drainage capacity of the valve body. However, the drain valve has the following problems: the valve core chamber where the main valve core is located and the water outlet channel in the valve body are easily blocked or leaked by particulate impurities. Since the existing drain valves are not removable after installation, they cannot be repaired after blockage, and the entire drain valve must be replaced, which undoubtedly increases the user's maintenance costs. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, this utility model innovatively provides a detachable electromagnetic drain valve that is easy to maintain.

[0004] This detachable electromagnetic drain valve includes a valve body, a main valve core, a secondary valve core, and a coil. The main valve core includes a valve core body and a valve core rod. The valve body has a main valve core chamber and a secondary valve core chamber. The main valve core is located in the main valve core chamber, and the secondary valve core is located in the secondary valve core chamber. The valve body has a water passage hole connecting the main valve core chamber and the secondary valve core chamber. The valve core rod is located in the water passage hole. The valve body is characterized by having a detachable limiting ring located above the valve core body. A spring is provided between the valve core body and the limiting ring. The limiting ring has a break. The valve body has a first annular groove, and the limiting ring is engaged in the first annular groove.

[0005] The limiting ring has mounting holes at both ends of its break.

[0006] The valve body is provided with a detachable filter cover, which is located above the limiting ring. The lower end of the filter cover has a snap-fit ​​protrusion, and the valve body has a second annular groove. The snap-fit ​​protrusion of the filter cover can be snapped into the second annular groove.

[0007] The lower end of the filter cover has an upwardly extending constricted notch.

[0008] A filter screen is provided between the limiting ring and the spring.

[0009] The spring is a tower spring, and the valve core is provided with a positioning part. The small end of the tower spring is fitted onto the positioning part, and the large end of the tower spring is positioned below the limiting ring.

[0010] The valve body is provided with a coil frame, and the coil is wound on the coil frame. The bottom of the valve body is fitted with a lower fixing plate, which fixes the coil frame in the valve body. The bottom of the lower fixing plate is provided with a base plate, which is connected to the lower fixing plate by bolts. The base plate has a drainage hole.

[0011] The first sealing ring between the coil frame and the base plate.

[0012] The second sealing ring is located between the coil frame and the lower fixing plate.

[0013] The detachable electromagnetic drain valve provided by this utility model is convenient for maintenance and significantly reduces user costs and after-sales costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model (the filter cover and the limiting ring are hidden). Figure 3 This is the front view of the limit ring; Figure 4 This is the front view of the filter cover; Figure 5 This is a partial schematic diagram of the present invention (with a filter cover and a limiting ring installed). Detailed Implementation

[0015] like Figure 1As shown, this detachable electromagnetic drain valve includes a valve body 1, a main valve core 3, a secondary valve core 2, and a coil 18. The main valve core 3 includes a valve core body 31 and a valve core rod 32. The valve body 1 has a main valve core chamber 16 and a secondary valve core chamber 17. The main valve core 3 is located in the main valve core chamber 16, and the secondary valve core 2 is located in the secondary valve core chamber 17. The valve body 1 has a water passage hole 15 connecting the main valve core chamber 16 and the secondary valve core chamber 17. The valve core rod 32 is located in the water passage hole 15. A detachable limiting ring 5 is provided inside the valve body 1. The limiting ring 5 is located above the valve core body 31. A spring 6 is provided between the valve core body 31 and the limiting ring 5 (the limiting ring 5 serves to support the spring 6 and also supports the filter screen 4). Figure 3 As shown, the limiting ring 5 has a break 50, as Figure 2 As shown, the valve body 1 has a first annular groove 10, and the limiting ring 5 can be locked in the first annular groove 10. Because the limiting ring 5 has a break 50, it can retract when squeezed, thus easily locking it in the first annular groove 10 and facilitating its removal. When the main valve core chamber 16 or the water passage 15 becomes blocked, the limiting ring 5 can be removed, allowing the main valve core 3 and spring 6 to be removed from the inlet. The main valve core chamber 16 and water passage 15 can then be cleaned to remove the blockage. After this, the main valve core 3, spring 6, and limiting ring 5 can be reinstalled to allow the drain valve to function normally.

[0016] like Figure 3 As shown, both ends of the break 50 of the limiting ring 5 have mounting holes 51. To install the limiting ring 5, simply insert the two clamps of the caliper into the two mounting holes 51 of the limiting ring 5, then pull the caliper to retract the limiting ring 5, thus placing it into the first annular groove 10. Release the caliper to allow the limiting ring 5 to return to its original position, and it will be securely locked into the first annular groove 10. Installation is very convenient. Disassembling the limiting ring 5 is also easy using the caliper, facilitating cleaning of the inside of the cleaning valve body 1.

[0017] To minimize the entry of impurities from the wastewater into the valve body, a filter cover 7 is installed at the inlet of the valve body 1. Figure 5 As shown, the filter cover 7 can also be detachably mounted on the valve body 1. The filter cover 7 is located above the limiting ring 5, as shown. Figure 4 As shown, the lower end of the filter cover 7 has a snap-fit ​​protrusion 71, and the valve body 1 has a second annular groove 11. The snap-fit ​​protrusion 71 of the filter cover 7 can be snapped into the second annular groove 11.

[0018] To facilitate the snap-fitting of the filter cover 7, such as Figure 4As shown, the lower end of the filter cover 7 has an upwardly extending contraction notch 70. Due to the presence of the contraction notch 70, the snap-fit ​​end of the filter cover 7 can be contracted, which is the same principle as the break 50 of the limiting ring 5. This facilitates the snap-fit ​​protrusion 71 of the filter cover 7 to be snapped into the second annular groove 11, and also facilitates the disassembly of the filter cover 7.

[0019] To further prevent impurity particles from entering valve body 1, such as Figure 5 As shown, a filter screen 4 is provided between the limiting ring 5 and the spring 6. Specifically, the upper end of the spring 6 acts on the filter screen 4, and the filter screen 4 rests against the lower part of the limiting ring 5. The filter screen 4 effectively prevents impurities from entering the valve body 1, making the drain valve more durable.

[0020] like Figure 1 As shown, the spring 6 is a tower spring (smaller at one end and larger at the other). The valve core 31 has a positioning part 30. The small end of the tower spring is fitted onto the positioning part 30, and the large end of the tower spring rests on the bottom of the limiting ring 5. The advantage of this structure is that there is no groove structure for placing the spring 6. In cold regions, water in the groove will not freeze and affect the performance of the spring 6, ensuring that the drain valve can work normally under cold conditions.

[0021] like Figure 1 As shown, a coil frame 19 is provided inside the valve body 1, and a coil 18 is wound on the coil frame 19. A lower fixing plate 9 is fixed to the bottom of the valve body 1, securing the coil frame 19 inside the valve body 1. A base plate 8 is provided at the bottom of the lower fixing plate 9, and the base plate 8 is connected to the lower fixing plate 9 by bolts 14. The base plate 8 has a drain hole 80. When the coil 18 is energized, the auxiliary valve core 2 can move upward. The auxiliary valve core 2 acts upward on the valve core rod 32 of the main valve core 3, causing the main valve core 3 to move upward. In this way, the valve core body 31 of the main valve core 3 will not block the water passage hole 15, and water will enter the auxiliary valve core chamber 17 through the water passage hole 15. Since the side wall of the auxiliary valve core 2 has a drain groove, the water will be discharged from the drain hole 80 through the drain groove. Since the base plate 8 is detachable, the lower fixing plate 9 can be removed, thus allowing the auxiliary valve core 2 and the coil frame 19 to be removed for easy cleaning of the auxiliary valve core chamber 17 and the auxiliary valve core 2.

[0022] To form a seal, a first sealing ring 12 is provided between the coil frame 19 and the base plate 8. This first sealing ring 12 enables a seal between the coil frame 19 and the base plate 8, preventing liquid in the secondary valve core chamber 17 from flowing out between the coil frame 19 and the base plate 8.

[0023] Similarly, to form a seal, a second sealing ring 13 is provided between the coil frame 19 and the lower fixing plate 9. This second sealing ring 13 can form a seal between the coil frame 19 and the lower fixing plate 9, preventing liquid from entering the space where the coil 18 is located.

Claims

1. A detachable electromagnetic drain valve, comprising a valve body (1), a main valve core (3), a secondary valve core (2), and a coil (18), wherein the main valve core (3) comprises a valve core body (31) and a valve core rod (32), the valve body (1) having a main valve core chamber (16) and a secondary valve core chamber (17), the main valve core (3) being located within the main valve core chamber (16), the secondary valve core (2) being located within the secondary valve core chamber (17), the valve body (1) having a water passage hole (15) connecting the main valve core chamber (16) and the secondary valve core chamber (17), and the valve core rod (32) being located within the water passage hole (15), characterized in that: The valve body (1) is provided with a detachable limiting ring (5), the limiting ring (5) is located above the valve core (31), a spring (6) is provided between the valve core (31) and the limiting ring (5), the limiting ring (5) has a break (50), the valve body (1) has a first annular groove (10), and the limiting ring (5) is engaged in the first annular groove (10).

2. The detachable electromagnetic drain valve according to claim 1, characterized in that: The limiting ring (5) has mounting holes (51) at both ends of the break (50).

3. A detachable electromagnetic drain valve according to claim 1, characterized in that: The valve body (1) is provided with a detachable filter cover (7), which is located above the limiting ring (5). The lower end of the filter cover (7) has a snap-fit ​​protrusion (71), and the valve body (1) has a second annular groove (11). The snap-fit ​​protrusion (71) of the filter cover (7) is snapped into the second annular groove (11).

4. A detachable electromagnetic drain valve according to claim 3, characterized in that: The lower end of the filter cover (7) has an upwardly extending constriction notch (70).

5. A detachable electromagnetic drain valve according to claim 1 or 2, characterized in that: A filter screen (4) is provided between the limiting ring (5) and the spring (6).

6. A detachable electromagnetic drain valve according to claim 1, characterized in that: The spring (6) is a tower spring. The valve core (31) is provided with a positioning part (30). The small end of the tower spring is fitted onto the positioning part (30), and the large end of the tower spring is positioned below the limiting ring (5).

7. A detachable electromagnetic drain valve according to claim 1, characterized in that: The valve body (1) is provided with a coil frame (19), and the coil (18) is wound on the coil frame (19). The bottom of the valve body (1) is provided with a lower fixing plate (9), which fixes the coil frame (19) inside the valve body (1). The bottom of the lower fixing plate (9) is provided with a base plate (8), which is connected to the lower fixing plate (9) by bolts (14). The base plate (8) has a drain hole (80).

8. A detachable electromagnetic drain valve according to claim 7, characterized in that: The first sealing ring (12) is between the coil frame (19) and the base plate (8).

9. A detachable electromagnetic drain valve according to claim 7, characterized in that: The second sealing ring (13) is between the coil frame (19) and the lower fixing plate (9).

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