A two-way direct acting valve

Abstract

The utility model relates to solenoid valve field, concretely relates to a two -way direct valve, including valve body subassembly, coil subassembly, static core, moving core, elastic sealing plug, moving core bottom is equipped with limit slot, and elastic sealing plug is fixed in limit slot, and moving core outer periphery is equipped with the first fluid channel that communicates moving core upper end chamber and inflow channel, and moving core is equipped with the second flow channel that communicates limit slot and its one end end part near static core, when moving core and static core are separated, first fluid channel and second flow channel are connected. The utility model sets up first fluid channel and second flow channel, when solenoid valve is closed, and elastic sealing plug is blocked in valve port, and elastic sealing plug top is connected through first fluid channel and second flow channel with inflow channel, and hydraulic pressure acts on elastic sealing plug and makes elastic sealing plug seal more stable, and the effect of static pressure resistance is better under the closed state, so can be used for higher pressure pipeline, is applicable to 2.0MPa's pipeline.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valves, specifically to a two-way direct-acting valve. Background Technology

[0002] The applicant's prior patent CN202123111481.8 discloses a small low-water-pressure solenoid valve, including a valve body, a coil assembly, and a valve core assembly. The valve body has a valve cavity, an inflow channel, and an outflow channel. The coil assembly includes a coil frame, a coil, a frame, and a stationary iron core. The valve core assembly includes a moving iron core partially located within the valve core mounting cavity and a sealing head located at the sealing end of the moving iron core away from the valve core mounting cavity. A spring is provided between the moving iron core and the stationary iron core. Under the electromagnetic driving force of the spring and the coil, the valve core assembly slides linearly relative to the valve body, causing the sealing head to block or open the sealing port. The above-mentioned prior art has a simple, compact structure and is easy to install, which can reduce the overall size. However, the above-mentioned prior art is applicable to low-water-pressure pipelines with a water pressure of less than 0.8 MPa. When the water pressure in the pipeline is slightly higher, the solenoid valve cannot open and close normally. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a two-way direct-acting valve.

[0004] The technical solution adopted by this utility model is as follows: a two-way direct-acting valve, including a valve body assembly, a coil assembly, a stationary iron core, a moving iron core, and an elastic sealing plug;

[0005] The valve body assembly is provided with an inflow channel and an outflow channel, and the valve body is provided with a valve port that connects the inflow channel and the outflow channel;

[0006] The coil assembly is provided with a hollow channel;

[0007] The stationary iron core is fixed inside the hollow channel of the coil assembly;

[0008] The moving iron core is disposed between the stationary iron core and the valve port, and an elastic sealing plug is fixed at one end of the moving iron core near the valve port. A spring acts on the moving iron core to generate a force that drives it toward the valve port.

[0009] The bottom of the moving iron core is provided with a limiting groove, and the elastic sealing plug is fixed in the limiting groove. The outer periphery of the moving iron core is provided with a first fluid channel connecting the upper chamber of the moving iron core and the inflow channel. The moving iron core is provided with a second flow channel connecting the limiting groove and one end of the moving iron core near the stationary iron core. When the moving iron core is separated from the stationary iron core, the first fluid channel and the second flow channel are connected.

[0010] The stationary iron core is fixedly connected to a magnetic shielding sleeve at one end near the valve port. The magnetic shielding sleeve extends into the inner cavity of the valve body assembly. The moving iron core is located inside the magnetic shielding sleeve and forms a first fluid channel with the magnetic shielding sleeve.

[0011] The magnetic shielding sleeve has a cylindrical movable cavity inside. The circumferential surface of the moving iron core includes a cylindrical curved surface and a flat surface. The cylindrical curved surface of the moving iron core is adapted to fit the inner wall of the cylindrical movable cavity so that the magnetic shielding sleeve limits the moving iron core. A first fluid channel is formed between the flat surface of the moving iron core and the inner wall of the cylindrical movable cavity.

[0012] The valve body assembly includes a valve body and a valve cover, which are fixedly connected and the magnetic sleeve is located between the valve body and the valve cover; the end of the stationary iron core away from the valve body assembly is provided with a limiting structure that limits the coil assembly.

[0013] The magnetic shielding sleeve has a horizontal convex ring at one end of the valve body assembly, the valve cover has an upper pressure ring, and the valve body has a lower support ring. The upper end face of the horizontal convex ring is attached to the upper pressure ring and the lower end face is attached to the lower support ring.

[0014] The valve body has a sealing groove in the lower support ring, and an O-ring is embedded in the sealing groove. The horizontal convex ring is sealed with the O-ring. The valve body and valve cover are connected and fixed by a threaded fastening structure.

[0015] The moving iron core has a spring abutment protrusion at one end near the valve port. The spring is a tower-shaped spring with one end abutting the spring abutment protrusion and the other end abutting the horizontal protrusion.

[0016] The end of the stationary iron core furthest from the valve body assembly is fitted with a limiting washer, and a fastening nut is threaded to the outer end of the limiting washer. The coil assembly is limited between the limiting washer and the valve body assembly.

[0017] The elastic sealing plug includes a limiting body and an upper protrusion and a lower protrusion respectively protruding from the upper and lower ends of the limiting body. The moving iron core has a tapered opening and a through-hole respectively at the upper and lower ends of the limiting groove. The tapered opening connects to the limiting groove and the second flow channel, and the end connected to the second flow channel is the smaller diameter end. The limiting body is tightly fitted with the limiting groove. The upper protrusion is located in the tapered opening and a deformation gap is formed between it and the tapered opening. The width of the upper protrusion is greater than the width of the smaller diameter end of the tapered opening. The lower protrusion is located in the through-hole and its width is less than the width of the through-hole.

[0018] The end face of the upper protrusion and the circumferential surface are rounded.

[0019] The beneficial effects of this utility model are as follows: This utility model is provided with a first fluid channel and a second flow channel. When the solenoid valve is closed, the elastic sealing plug blocks the valve port. The upper part of the elastic sealing plug is connected to the inflow channel through the first fluid channel and the second flow channel. The hydraulic pressure acts on the elastic sealing plug to make the elastic sealing plug seal more stable. The static pressure resistance is better in the closed state. Therefore, it can be used in pipelines with higher pressure and is suitable for pipelines with a pressure of 2.0MPa. Attached Figure Description

[0020] 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 some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0021] Figure 1 This is an exploded view of one embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of one embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the moving iron core assembly cooperating with the stationary iron core and the magnetic shielding sleeve in one embodiment of the present invention;

[0024] Figure 4 for Figure 3 Enlarged schematic diagram of part I;

[0025] Figure 5 This is a schematic diagram of the moving iron core in one embodiment of the present invention;

[0026] Figure 6 This is a cross-sectional view of the moving iron core in one embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the static iron core assembly in one embodiment of the present invention;

[0028] Figure 8 for Figure 2 Enlarged schematic diagram of part I;

[0029] In the diagram, valve body assembly - A, coil assembly - B, stationary iron core assembly - C, and moving iron core assembly - D;

[0030] Valve body-110, inflow channel-111, outflow channel-112, valve port-113, lower support ring-114, sealing groove-115, valve cover-120, upper pressure ring-121, O-ring seal-130, spring-200, stationary iron core-300, limiting washer-310, fastening nut-320, moving iron core-400, limiting groove-410, first fluid channel-420, second flow channel-430, conical opening-440, through-hole-450, cylindrical curved surface-461, flat surface-462, spring abutment convex ring-470, elastic sealing plug-500, limiting body-510, upper protrusion-520, lower protrusion-530, magnetic shielding sleeve-600, horizontal convex ring-610. Detailed Implementation

[0031] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0032] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0033] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0034] A type of two-way direct-acting valve, such as Figure 1 As shown, it includes valve body assembly A, coil assembly B, stationary iron core assembly C, moving iron core assembly D, and spring 200.

[0035] like Figure 2As shown, the valve body assembly A includes a valve body 110 and a valve cover 120, which are connected to form a valve cavity. The valve body 110 has an inflow channel 111 and an outflow channel 112, and the valve body 110 has a valve port 113 communicating with the inflow channel 111 and the outflow channel 112. The coil assembly B is connected to the upper end of the valve cover 120 and has a hollow channel. The stationary iron core assembly C includes a stationary iron core 300 fixed in the hollow channel of the coil assembly B. The moving iron core assembly D includes a moving iron core 400 and an elastic sealing plug 500, with the moving iron core 400 disposed between the stationary iron core 300 and the valve port 113. An elastic sealing plug 500 is fixed at one end near the valve port 113. A spring 200 acts on the moving iron core 400 to exert a force on it in the direction of the valve port 113. When the coil assembly B is not energized, the spring 200 acts on the moving iron core 400 to block the valve port 113 with the elastic sealing plug 500. The inflow channel 111 and the outflow channel 112 are not connected. When the coil assembly B is energized, an electromagnetic field is formed, and a magnetic attraction force is formed between the stationary iron core 300 and the moving iron core 400, which drives the moving iron core 400 to move upward. The elastic sealing plug 500 leaves the valve port 113, and the inflow channel 111 and the outflow channel 112 are connected.

[0036] Specifically, such as Figure 3 , Figure 4 As shown, the moving iron core 400 has a longitudinally penetrating through hole, and a limiting groove 410 is provided at the bottom of the through hole. The elastic sealing plug 500 is fixed in the limiting groove 410, and a second flow channel 430 is provided above the limiting groove 410. Figure 5 As shown, a magnetic shielding sleeve 600 is fixedly connected to one end of the stationary iron core 300 near the valve port 113. The magnetic shielding sleeve 600 extends into the inner cavity of the valve body assembly 100. The moving iron core 400 is located inside the magnetic shielding sleeve 600 and forms a longitudinally penetrating first fluid channel 420 between the moving iron core 400 and the magnetic shielding sleeve 600. When the moving iron core 400 is separated from the stationary iron core 300, the first fluid channel 420 is connected to the second flow channel 430. This makes the medium pressure in the upper chamber of the elastic sealing plug 500 comparable to that in the inflow channel 111, so that the solenoid valve of this embodiment can be used in pipelines with higher pressure, and is suitable for pipelines with a pressure of 2.0 MPa.

[0037] Furthermore, such as Figure 4As shown, the elastic sealing plug 500 includes a limiting body 510 and an upper protrusion 520 and a lower protrusion 530 respectively protruding from the upper and lower ends of the limiting body 510. The moving iron core 400 has a tapered opening 440 and a through-hole 450 respectively at the upper and lower ends of the limiting groove 410. The tapered opening 440 connects to the limiting groove 410 and the second flow channel 430, and the end connected to the second flow channel 430 is the smaller diameter end. The limiting body 510 is tightly fitted with the limiting groove 410. The upper protrusion 520 is located in the tapered opening 440 and a deformation gap is formed between it and the tapered opening 440. The width of the upper protrusion 520 is greater than the width of the smaller diameter end of the tapered opening 440. The lower protrusion 530 is located in the through-hole 450 and its width is less than the width of the through-hole 450. The deformation gap between the upper protrusion 520 and the tapered through-hole 440, and the gap between the lower protrusion 530 and the through-hole 450, provide sealing deformation space for the elastic sealing plug 500, resulting in a better sealing effect. Furthermore, the end face of the upper protrusion 520 has a rounded transition with the circumferential surface.

[0038] like Figure 7 As shown, a magnetic shielding sleeve 600 is fixedly connected to one end of the stationary iron core 300 near the valve port 113. The magnetic shielding sleeve 600 extends into the inner cavity of the valve body assembly 100. The moving iron core 400 is located inside the magnetic shielding sleeve 600 and forms a first fluid channel 420 with the magnetic shielding sleeve 600. The magnetic shielding sleeve 600 is made of a material that can block or weaken the propagation of magnetic fields, thereby reducing the influence of the electromagnetic field generated by the coil assembly on the moving iron core 400. This makes the longitudinal magnetic attraction between the stationary iron core 300 and the moving iron core 400 more controllable. High magnetic permeability materials, such as iron-nickel alloys or iron-silicon-aluminum composite materials, can be used.

[0039] Furthermore, the magnetic shielding sleeve 600 is provided with a cylindrical movable cavity, such as... Figure 5 As shown, the circumferential surface of the moving iron core 400 includes a cylindrical curved surface 461 and a flat surface 462. The cylindrical curved surface 461 of the moving iron core 400 fits and conforms to the inner wall of the cylindrical movable cavity, so that the magnetic shielding sleeve 600 limits the moving iron core 400. A first fluid channel 420 is formed between the flat surface 462 of the moving iron core 400 and the inner wall of the cylindrical movable cavity. Specifically, there are two flat surfaces 462 arranged parallel to each other, and two cylindrical curved surfaces 461 connected between the two flat surfaces 462. This facilitates low-cost processing.

[0040] Furthermore, the magnetic shielding sleeve 600 is positioned between the valve body 110 and the valve cover 120; the end of the stationary iron core 300 away from the valve body assembly 100 is provided with a limiting structure that limits the coil assembly B. Specifically, the magnetic shielding sleeve 600 has a horizontal convex ring 610 at one end of the valve body assembly 100, an upper pressure ring 121 is provided inside the valve cover 120, and a lower support ring 114 is provided on the valve body 110. The upper end face of the horizontal convex ring 610 is attached to the upper pressure ring 121, and the lower end face is attached to the lower support ring 114. The valve body 110 has a sealing groove 115 within the lower support ring 114, and an O-ring 130 is embedded in the sealing groove 115. The horizontal convex ring 610 and the O-ring 130 are sealed together to ensure reliable sealing of the valve cavity. At the same time, the upper and lower ends of the horizontal convex ring 610 are stably fixed by the upper pressure ring 121 and the lower support ring 114, so that the stationary iron core assembly C is stably fixed by the valve body 110 and the valve cover 120. The valve body 110 and the valve cover 120 are connected and fixed by a threaded fastening structure. Specifically, the outer wall of the valve body 110 has external threads, and the outer wall of the valve cover 120 has internal threads. They are directly screwed together for easy assembly. The end of the stationary iron core 300 away from the valve body assembly 100 is fitted with a limiting washer 310, and a fastening nut 320 is threadedly connected to the outer end of the limiting washer 310. The coil assembly B is located between the limiting washer 310 and the valve body assembly 100.

[0041] The moving iron core 400 has a spring abutment protrusion 470 at one end near the valve port 113 on its outer periphery. The spring 200 is a tower-shaped spring with one end abutting the spring abutment protrusion 470 and the other end abutting the horizontal protrusion 610.

[0042] This embodiment is easy to assemble. Specifically, the assembly process includes the following: the spring 200 is sleeved on the outside of the moving iron core assembly D, and the stationary iron core 300 and the magnetic shielding sleeve 600 are sleeved on the outside of the moving iron core assembly D. Then, they are connected to the valve body 110 and the valve cover 120. After that, the coil assembly B is sleeved on the outside of the stationary iron core 300, and the limiting washer 310 and the fastening nut 320 are connected to complete the fixation.

[0043] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A two-way direct-acting valve, comprising a valve body assembly (A), a coil assembly (B), a stationary iron core (300), a moving iron core (400), and an elastic sealing plug (500); The valve body assembly (A) is provided with an inflow channel (111) and an outflow channel (112), and the valve body assembly (A) is provided with a valve port (113) that connects the inflow channel (111) and the outflow channel (112); The coil assembly (B) is provided with a hollow channel; The stationary iron core (300) is fixed in the hollow channel of the coil assembly (B); The moving iron core (400) is disposed between the stationary iron core (300) and the valve port (113), and an elastic sealing plug (500) is fixed at one end of the moving iron core (400) near the valve port (113). A spring (200) is provided to act on the moving iron core (400) to generate a force that drives it toward the valve port (113). characterized in that The bottom of the moving iron core (400) is provided with a limiting groove (410), and the elastic sealing plug (500) is fixed in the limiting groove (410). The outer periphery of the moving iron core (400) is provided with a first fluid channel (420) connecting the upper chamber of the moving iron core (400) and the inflow channel (111). The moving iron core (400) is provided with a second flow channel (430) connecting the limiting groove (410) and its end near the stationary iron core (300). When the moving iron core (400) is separated from the stationary iron core (300), the first fluid channel (420) and the second flow channel (430) are connected.

2. The two-way direct valve according to claim 1, characterized by: The stationary iron core (300) is fixedly connected to a magnetic shielding sleeve (600) at one end near the valve port (113). The magnetic shielding sleeve (600) extends into the inner cavity of the valve body assembly (A). The moving iron core (400) is located inside the magnetic shielding sleeve (600) and forms a first fluid channel (420) with the magnetic shielding sleeve (600).

3. The two-way direct valve according to claim 2, characterized by: The magnetic shielding sleeve (600) has a cylindrical movable cavity inside. The circumferential surface of the moving iron core (400) includes a cylindrical curved surface (461) and a flat surface (462). The cylindrical curved surface (461) of the moving iron core (400) fits and conforms to the inner wall of the cylindrical movable cavity so that the magnetic shielding sleeve (600) limits the moving iron core (400). A first fluid channel (420) is formed between the flat surface (462) of the moving iron core (400) and the inner wall of the cylindrical movable cavity.

4. The two-way direct valve according to claim 2, characterized by: The valve body assembly (A) includes a valve body (110) and a valve cover (120), the valve body (110) and the valve cover (120) are fixedly connected and the magnetic shielding sleeve (600) is located between the valve body (110) and the valve cover (120); the stationary iron core (300) is provided with a limiting structure at one end away from the valve body assembly (A) to limit the coil assembly (B).

5. The two-way direct valve according to claim 4, characterized by: The magnetic shielding sleeve (600) is provided with a horizontal convex ring (610) at one end of the valve body assembly (A), the valve cover (120) is provided with an upper pressure ring (121), the valve body (110) is provided with a lower support ring (114), the upper end face of the horizontal convex ring (610) is attached to the upper pressure ring (121) and the lower end face is attached to the lower support ring (114).

6. The two-way direct valve according to claim 5, characterized by: The valve body (110) has a sealing groove (115) in the lower support ring (114), and an O-ring (130) is embedded in the sealing groove (115). The horizontal convex ring (610) and the O-ring (130) are sealed together. The valve body (110) and the valve cover (120) are connected and fixed by a threaded fastening structure.

7. The two-way direct valve according to claim 5, characterized by: The moving iron core (400) has a spring abutment protrusion ring (470) at one end near the valve port (113) on its outer periphery. The spring (200) is a tower-shaped spring with one end abutting the spring abutment protrusion ring (470) and the other end abutting the horizontal protrusion ring (610).

8. The two-way direct valve according to claim 4, characterized by: The stationary iron core (300) is fitted with a limiting washer (310) at one end away from the valve body assembly (A), and a fastening nut (320) is threaded to the outer end of the limiting washer (310). The coil assembly (B) is located between the limiting washer (310) and the valve body assembly (A).

9. The two-way direct valve according to any one of claims 1 to 8, characterized in that: The elastic sealing plug (500) includes a limiting body (510) and an upper protrusion (520) and a lower protrusion (530) respectively protruding from the upper and lower ends of the limiting body (510). The moving iron core (400) has a tapered through-hole (440) and a through-hole (450) respectively at the upper and lower ends of the limiting groove (410). The tapered through-hole (440) connects the limiting groove (410) and the second flow channel (430) and is connected to the second flow channel. (430) The end connected is the end with a smaller diameter. The limiting body (510) and the limiting groove (410) are tightly fitted. The upper protrusion (520) is located inside the conical opening (440) and a deformation gap is formed between it and the conical opening (440). The width of the upper protrusion (520) is greater than the width of the end with a smaller diameter of the conical opening (440). The lower protrusion (530) is located in the through opening (450) and its width is less than the width of the through opening (450).

10. The two-way direct valve according to claim 9, characterized by: The end face of the upper protrusion (520) and the circumferential surface are rounded.

Images