Two-way electromagnetic valve with guiding function

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to a two-way electromagnetic valve with a guiding function, which comprises a valve body, a static iron core, a movable iron core, a valve needle component, a second spring and an electromagnetic coil, a through sliding hole is formed in the movable iron core along the central position; the valve needle assembly comprises a valve needle and a piston head, the end of the valve needle is embedded into the sliding hole, and a first spring is arranged in the sliding hole. The second spring is arranged between the movable iron core group and the static iron core group; the opposite faces of the static iron core and the movable iron core are provided with a conical groove and a conical protrusion which are matched with each other, the conical protrusion of the movable iron core is provided with a plurality of installation holes, the installation holes are communicated with the sliding hole, telescopic rods are arranged in the installation holes, and when the conical protrusion makes contact with the conical groove, the ends of the telescopic rods abut against the valve needle to correct the center of the moving movable iron core. And meanwhile, centering of the valve needle is achieved, and the closing reliability of the electromagnetic valve is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a two-way solenoid valve with a guiding function. Background Art

[0002] The solenoid valve is an industrial device controlled by electromagnetics. It is a basic automation component used to control fluids and is an actuator. Its main principle is to open and close through the coordination of electromagnetic force and elastic force.

[0003] The existing solenoid valve mainly includes a valve body, a moving iron core, a stationary iron core, a valve needle and an electromagnetic coil. When the electromagnetic coil is energized, the magnetic field generated by the stationary iron core will attract the moving iron core, causing the moving iron core to move. The movement of the moving iron core will drive the valve needle connected to it to move. The movement of the valve needle will change the channel inside the valve body, thereby controlling the flow of fluid (such as gas or liquid).

[0004] However, due to the gap between the moving iron core and the side wall of the magnetic isolation tube, the moving iron core may be displaced when the fluid pressure changes, causing the valve needle and the valve port to be misaligned, seriously affecting the closing reliability of the solenoid valve. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a two-way solenoid valve with a guiding function, which effectively solves the problems in the background technology.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a two-way solenoid valve with a guiding function, comprising:

[0007] a valve body having a valve port;

[0008] a static iron core, arranged at a position of the valve body located at the valve port;

[0009] The moving iron core is coaxially arranged with the static iron core and has a penetrating sliding hole along the center;

[0010] A valve needle assembly includes a valve needle disposed in the movable iron core and a piston head disposed in the stationary iron core, wherein an end of the valve needle is embedded in the sliding hole, and a first spring is disposed in the sliding hole for abutting against the end of the valve needle;

[0011] a second spring, disposed between the movable iron core group and the static iron core group;

[0012] An electromagnetic coil is used to drive the movable iron core to move, so as to drive the valve needle to pass through the piston head to close the valve port;

[0013] In which, the opposing surfaces of the static iron core and the moving iron core are provided with matching conical grooves and conical protrusions, and a plurality of mounting holes are provided through the conical protrusions of the moving iron core, the mounting holes are connected with the sliding holes, and a telescopic rod is provided in the mounting holes. When the conical protrusion contacts the conical groove, the end of the telescopic rod abuts against the valve needle.

[0014] Furthermore, the mounting hole is arranged along a direction perpendicular to the axis of the conical protrusion.

[0015] Furthermore, the mounting hole is arranged in a direction perpendicular to the conical surface where the conical protrusion is located.

[0016] Furthermore, the telescopic rod includes a sliding shaft section and ejector pins located at both ends of the sliding shaft section, and the diameter of the sliding shaft section is larger than the diameter of the ejector pins;

[0017] A first through hole for the sliding shaft segment to slide into, and a second through hole for the ejector pin to slide into are provided in the mounting hole, and a third spring is provided on the ejector pin on the side of the telescopic rod located at the valve needle, one end of the third spring abuts against the step surface of the sliding shaft segment, and the other end abuts against the step surface of the first through hole.

[0018] Furthermore, a spring plunger is provided at the end of the ejector pin.

[0019] Furthermore, a sealing cover is provided at one end of the first through hole close to the tapered groove.

[0020] Furthermore, the end of the ejector pin is in a spherical structure.

[0021] Furthermore, a limit block is provided at one end of the sliding hole away from the valve needle, and the limit block is screwed into the sliding hole. One end of the first spring abuts against the valve needle, and the other end abuts against the limit block.

[0022] Furthermore, the movable iron core is provided with a cylindrical hole located at the center of the tapered groove for embedding the second spring.

[0023] The beneficial effects of the present invention are as follows: the present invention can perform center correction on the moving moving iron core through the setting of the conical groove and the conical protrusion, and during the movement of the moving iron core, the valve needle is centered through the synchronous action of the telescopic rod, thereby reducing the shaking and tilting of the valve needle caused by unstable fluid pressure, thereby reducing the risk of valve needle bending or damage, and effectively ensuring the reliability of the solenoid valve closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a structural diagram of a two-way solenoid valve with a guide function in an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the installation of the static iron core and the moving iron core in the embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the first installation method of the telescopic rod on the moving iron core in an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of a second installation method of the telescopic rod on the moving iron core in an embodiment of the present utility model;

[0029] Figure 5 for Figure 4 A local enlarged view of point A;

[0030] Figure 6 Schematic diagram of the structure of the telescopic rod in the embodiment of the present utility model.

[0031] Figure numerals: 1. valve body; 2. static iron core; 2a. conical groove; 3. moving iron core; 31. sliding hole; 3a. conical protrusion; 32. mounting hole; 321. first through hole; 322. second through hole; 33. limit block; 4. valve needle assembly; 41. valve needle; 42. piston head; 43. first spring; 5. second spring; 6. electromagnetic coil; 7. telescopic rod; 71. sliding shaft section; 72. ejector pin; 73. third spring; 74. sealing cover. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] like Figures 1 to 6 The two-way solenoid valve with a guiding function shown in the figure comprises: a valve body 1, a static iron core 2, a movable iron core 3, a valve needle 41 assembly 4, a second spring 5 and an electromagnetic coil 6. The valve body 1 has a valve port; the static iron core 2 is arranged at the position of the valve body 1 at the valve port; the movable iron core 3 is coaxially arranged with the static iron core 2, and a sliding hole 31 is provided through it along the center position; the valve needle 41 assembly 4 comprises a valve needle 41 arranged in the movable iron core 3, and a piston head 42 arranged in the static iron core 2, the end of the valve needle 41 is embedded in the sliding hole 31, and a first spring 43 for abutting the end of the valve needle 41 is provided in the sliding hole 31; the second spring 5 is arranged between the movable iron core 3 group and the static iron core 2 group; the electromagnetic coil 6 is used to drive the movable iron core 3 to move, so as to drive the valve needle 41 to close the valve port through the piston head 42;

[0036] Among them, the opposing surfaces of the static iron core 2 and the moving iron core 3 are provided with matching conical grooves 2a and conical protrusions 3a, and a plurality of mounting holes 32 are provided through the conical protrusions 3a of the moving iron core 3. The mounting holes 32 are connected to the sliding holes 31, and a telescopic rod 7 is provided in the mounting holes 32. When the conical protrusion 3a contacts the conical groove 2a, the end of the telescopic rod 7 abuts against the valve needle 41.

[0037] In the present invention, when the valve mouth of the valve body 1 is in the open state, the telescopic rod 7 tilted downward is in contact with the conical groove 2a. When the moving iron core 3 is affected by the magnetic force and moves toward the static iron core 2, the conical protrusion 3a is gradually embedded in the conical groove. As the gap decreases, the conical groove 2a pushes the telescopic rod 7 to slide in the mounting hole 32. When the conical protrusion 3a is completely embedded in the conical groove 2a, the other end of the telescopic rod 7 extends into the sliding hole 31 and abuts against the outer cylindrical surface of the valve needle 41 to center the valve needle 41.

[0038] By setting the conical groove 2a and the conical protrusion 3a, the center of the moving moving iron core 3 can be corrected. During the movement of the moving iron core 3, the valve needle 41 is centered through the synchronous action of the telescopic rod 7, thereby reducing the shaking and tilting of the valve needle 41 caused by unstable fluid pressure, thereby reducing the risk of bending or damage of the valve needle 41, and effectively ensuring the reliability of the solenoid valve closing.

[0039] In the present invention, the mounting hole 32 is arranged perpendicular to the conical surface of the conical protrusion 3a. The telescopic rod 7 can provide lateral support when the movable iron core 3 is engaged with the static iron core 2, thereby enhancing the stability of the movable iron core 3 and reducing the shaking and tilting of the movable iron core 3 caused by changes in fluid pressure. In another preferred structure, the mounting hole 32 is arranged perpendicular to the axis of the conical protrusion 3a.

[0040] In a preferred embodiment of the present invention, the telescopic rod 7 includes a sliding shaft section 71 and ejector pins 72 located at both ends of the sliding shaft section 71. The diameter of the sliding shaft section 71 is larger than the diameter of the ejector pin 72, so that the telescopic rod 7 can slide stably in the mounting hole 32, and at the same time, the centering effect of the ejector pin 72 on the valve needle 41 is more precise, ensuring that the valve needle 41 maintains the correct position and alignment in the sliding hole 31, and a first through hole 321 for the sliding shaft section 71 to slide into, and a second through hole 322 for the ejector pin 72 to slide into are provided in the mounting hole 32, and a third spring 73 is provided on the ejector pin 72 of the telescopic rod 7 located on the side of the valve needle 41, and one end of the third spring 73 abuts on the step surface of the sliding shaft section 71, and the other end abuts on the step surface of the first through hole 321.

[0041] The setting of the third spring 73 provides additional elastic support. When the telescopic rod 7 is subjected to external force, the spring can absorb the impact force, reduce the direct impact on the valve needle 41 and the sliding shaft segment 71, and reduce the wear on the valve needle 41 and the sliding hole 31, which helps to extend the service life of the valve needle 41 and the entire solenoid valve.

[0042] As a preferred embodiment of the above embodiment, a spring plunger is provided at the end of the ejector pin 72. When the telescopic rod 7 changes length due to external pressure, the spring plunger can absorb this pressure, reducing the direct impact on the ejector pin 72. The spring plunger can also be dynamically adjusted according to the actual length change of the telescopic rod 7, ensuring that the ejector pin 72 always maintains appropriate contact pressure with the valve needle 41, which helps to improve the centering accuracy of the valve needle 41.

[0043] On the basis of the above scheme, a cover 74 is provided at one end of the first through hole 321 close to the conical groove 2a. The cover 74 has an interference fit with the first through hole 321 and a clearance fit with the ejector pin 72, so that the ejector pin can slide in the inner hole of the cover 74. The cover 74 limits the movement range of the telescopic rod 7, reducing the friction and wear between the telescopic rod 7 and the conical groove 2a of the static iron core 2, thereby extending the service life of the solenoid valve.

[0044] In the preferred embodiment of the present invention, the end of the ejector pin 72 is spherical in structure. The contact points between the spherical end and the conical surface or cylindrical surface are concentrated, which can make the force more concentrated and the spherical end can be more accurately positioned at the vertex of the conical surface or the center of the cylindrical surface.

[0045] In the present invention, a stopper 33 is provided at the end of the sliding hole 31 away from the valve needle 41. The stopper 33 is threaded into the sliding hole 31. One end of a first spring 43 abuts the valve needle 41, while the other end abuts the stopper 33. The stopper 33 ensures the precise positioning of the valve needle 41 as it moves within the sliding hole 31, preventing the valve needle 41 from moving beyond the predetermined position due to external force or improper operation. By replacing the stopper 33 with different lengths, the driving force of the first spring 43 can be adjusted, effectively ensuring the sealing reliability of the valve needle 41 against the valve port.

[0046] In the present invention, a cylindrical hole for embedding the second spring 5 is provided at the center of the tapered groove 2 a of the movable iron core 3 , thereby ensuring the position accuracy of the second spring 5 .

[0047] Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and the specification are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-way solenoid valve with a guide function, characterized in that: include: A valve body (1) having a valve port; A static iron core (2) is arranged at a position of the valve body (1) at the valve port; The moving iron core (3) is coaxially arranged with the static iron core (2) and has a penetrating sliding hole (31) along the center; A valve needle (41) assembly (4) includes a valve needle (41) disposed in the movable iron core (3) and a piston head (42) disposed in the stationary iron core (2), wherein the end of the valve needle (41) is embedded in the sliding hole (31), and a first spring (43) is disposed in the sliding hole (31) for abutting the end of the valve needle (41); A second spring (5) is provided between the movable iron core (3) group and the static iron core (2) group; An electromagnetic coil (6) is used to drive the movable iron core (3) to move, thereby driving the valve needle (41) to close the valve port through the piston head (42); The opposite surfaces of the static iron core (2) and the movable iron core (3) are provided with matching conical grooves (2a) and conical protrusions (3a), and a plurality of mounting holes (32) are provided through the conical protrusions (3a) of the movable iron core (3), the mounting holes (32) are connected with the sliding holes (31), and a telescopic rod (7) is provided in the mounting holes (32), and when the conical protrusions (3a) are in contact with the conical grooves (2a), the end of the telescopic rod (7) abuts against the valve needle (41).

2. The two-way solenoid valve with a guide function according to claim 1, characterized in that: The mounting hole (32) is arranged along a direction perpendicular to the axis of the conical protrusion (3a).

3. The two-way solenoid valve with a guide function according to claim 1, characterized in that: The mounting hole (32) is arranged in a direction perpendicular to the conical surface where the conical protrusion (3a) is located.

4. The two-way solenoid valve with a guide function according to claim 1, characterized in that: The telescopic rod (7) comprises a sliding shaft section (71) and ejector pins (72) located at both ends of the sliding shaft section (71); the diameter of the sliding shaft section (71) is larger than the diameter of the ejector pins (72); A first through hole (321) for the sliding shaft section (71) to slide into, and a second through hole (322) for the ejector pin (72) to slide into are provided in the mounting hole (32), and a third spring (73) is provided on the ejector pin (72) on the side of the telescopic rod (7) located at the valve needle (41), and one end of the third spring (73) abuts against the step surface of the sliding shaft section (71), and the other end abuts against the step surface of the first through hole (321).

5. The two-way solenoid valve with a guide function according to claim 4, characterized in that: A spring plunger is provided at the end of the ejector pin (72).

6. The two-way solenoid valve with a guide function according to claim 4, characterized in that: A sealing cover (74) is provided at one end of the first through hole (321) close to the tapered groove (2a).

7. The two-way solenoid valve with a guide function according to claim 4, characterized in that: The end of the ejector pin (72) is in a spherical structure.

8. The two-way solenoid valve with a guide function according to claim 1, characterized in that: A limit block (33) is provided at one end of the sliding hole (31) away from the valve needle (41), and the limit block (33) is screwed into the sliding hole (31). One end of the first spring (43) abuts against the valve needle (41), and the other end abuts against the limit block (33).

9. The two-way solenoid valve with a guide function according to claim 1, characterized in that: The movable iron core (3) is provided with a cylindrical hole at the center of the tapered groove (2a) for embedding the second spring (5).

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