Leakage-proof electromagnetic valve

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to a leakage-proof electromagnetic valve which comprises a vertically-arranged cylindrical vertical core barrel, a valve element capable of rotating relative to the vertical core barrel is coaxially arranged in the vertical core barrel, and a flow guide hole penetrating through the valve element in the horizontal direction is formed in the valve element. Two connecting holes capable of communicating with the two ends of the flow guide hole respectively are symmetrically formed in the side walls of the left side and the right side of the vertical core cylinder, and the valve element is connected with an ejector rod capable of moving up and down and rotates along with up-down movement of the ejector rod. The electromagnetic valve can be opened when the valve element rotates to enable the flow guide hole and the connecting hole to be communicated, the fluid channel can be effectively blocked to close the electromagnetic valve when the valve element rotates to enable the flow guide hole and the connecting hole to be staggered and not communicated, liquid leakage of the electromagnetic valve is effectively prevented, the structural design is simple, and on-off of the electromagnetic valve can be stably and effectively controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to an anti-leakage electromagnetic valve. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic automation components used to control fluids. They are actuators and are not limited to hydraulic or pneumatic. They are used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed. There are many types of solenoid valves, and different solenoid valves play a role in different positions in the control system. The most commonly used ones are check valves, safety valves, directional control valves, speed regulating valves, etc.

[0003] In short, the working principle of a general solenoid valve is to use electromagnetic induction instead of human work to pull out the valve core. When the solenoid valve is powered off and closed, the valve core is in the middle of the valve body under the action of the spring to block the fluid transfer channel. When the solenoid valve is powered on and opened, the valve core moves downward under the influence of the electromagnetic induction of the coil, causing the spring to deform under force. The only valve core leaves the middle of the valve body, connecting the two ends of the valve body. There are certain defects in the solenoid valve of this structure. The elasticity of the spring connecting the valve core decreases after long-term use. At this time, the valve core can no longer effectively block the fluid channel inside the valve body, causing the solenoid valve to leak. Utility Model Content

[0004] The utility model aims to provide a leakage-proof solenoid valve with long service life and strong use stability in view of the above problems.

[0005] In order to achieve the above-mentioned purpose, the utility model discloses an anti-leakage electromagnetic valve, comprising a vertically arranged cylindrical vertical core tube, a valve core that can rotate relative to the vertical core tube is coaxially arranged inside the vertical core tube, a flow guide hole that passes through the valve core in the horizontal direction is arranged on the valve core, two connecting holes that can respectively connect the two ends of the flow guide hole are symmetrically opened on the side walls on the left and right sides of the vertical core tube, the valve core is connected to a push rod that can move up and down, and the valve core rotates with the push rod moving up and down. The on and off of the electromagnetic valve can be controlled by the rotation of the valve core, and the structural design is simple; the electromagnetic valve can be opened by rotating the valve core until the flow guide hole and the connecting hole are connected, and the fluid channel can be effectively blocked to close the electromagnetic valve by rotating the valve core until the flow guide hole and the connecting hole are misaligned and not connected, and the blocking effect is good.

[0006] The push rod is a cylindrical structure, and the upper surface of the valve core is provided with a matching hole coaxially arranged therewith and adapted to the push rod, and the matching hole is located above the diversion hole, and a slider is provided at the lower part of the side wall of the push rod, and a spiral slideway adapted to the slider is provided on the inner wall of the matching hole, and the slider slides in the slideway. Through the cooperation of the slideway and the slider, the valve core can rotate with the up and down movement of the push rod, or the push rod can move up and down with the rotation of the valve core, and the structural design is simple and ingenious.

[0007] Preferably, when the push rod moves downward to the lowermost end, the valve core rotates so that the two ends of the guide hole are respectively connected to the two connecting holes; when the push rod moves upward to the uppermost end, the valve core rotates so that the two ends of the guide hole are offset from the two connecting holes and are not connected.

[0008] Preferably, it further comprises a moving iron core vertically arranged in the vertical core tube and a coil sleeved outside the moving iron core, wherein the lower end of the moving iron core is connected to the upper end of the mandrel, and the moving iron core and the coil are used to control the up and down movement of the mandrel.

[0009] Preferably, the side wall of the valve core is provided with a revolving groove extending along its circumference, and an arc-shaped telescopic rod with its center located on the central axis of the valve core is arranged in the revolving groove, and one end of the telescopic rod is fixedly connected to the side wall of the revolving groove, and the other end is fixedly connected to the inner wall of the vertical core tube. The telescopic rod cooperates with the moving iron core to stably realize the forward and reverse rotation of the valve core and the up and down movement of the push rod. When the coil is energized, the moving iron core moves downward to drive the valve core to rotate, and then the telescopic rod is deformed by force. After the coil is de-energized, the valve core rotates back by relying on the deformation force of the telescopic rod, and then pushes the push rod to move upward to its original position. The structural design is ingenious and reasonable, which can ensure the stability of the solenoid valve.

[0010] Preferably, the telescopic rod comprises an arc-shaped outer rod and an arc-shaped curved tube with one end open, the curved tube is fixedly connected to the inner wall of the vertical core tube, a first spring is arranged along its length direction in the curved tube, one end of the first spring is fixedly connected to the inner wall of the curved tube, one end of the outer rod is slidably arranged in the curved tube and fixedly connected to the other end of the first spring, and the other end of the outer rod is fixedly connected to the side wall of the rotary groove. The arrangement of the first spring can effectively realize the extension and retraction of the telescopic rod, and the structural design is simple.

[0011] Preferably, when the push rod is located at the uppermost end, the first spring is minimally deformed or is not stressed, and when the push rod is located at the lowermost end, the first spring is maximally deformed.

[0012] Preferably, a second spring is provided in the vertical core tube and is located above the moving iron core. The lower end of the second spring is fixedly connected to the upper end of the moving iron core, and the upper end is fixedly connected to the upper end of the vertical core tube. The second spring can help the moving iron core move up to the original highest point after the coil is powered off, further ensuring the stability of the electromagnetic valve.

[0013] Preferably, a bearing located below the valve core is provided in the vertical core tube, the outer ring of the bearing is connected to the vertical core tube, the inner ring of the bearing is connected to the valve core, and the outer ring of the bearing does not contact the valve core.

[0014] Preferably, two tubular horizontal core tubes are respectively provided on the left and right sides of the vertical core tube, and the left and right connecting holes of the vertical core tube are respectively connected to the insides of the left and right horizontal core tubes.

[0015] In summary, the beneficial effects of the utility model are: the valve core is rotated to connect the guide hole and the connecting hole to open the internal fluid channel of the solenoid valve, and the valve core is rotated to dislocate the guide hole and the connecting hole to close the internal fluid channel of the solenoid valve, and the sealing performance is good. By providing a coil, a moving iron core and a telescopic rod matched therewith, the forward and reverse rotation of the valve core and the up and down movement of the push rod can be stably realized, thereby improving the stability of the use of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an anti-leakage solenoid valve of the utility model;

[0017] Figure 2 yes Figure 1 Right view of;

[0018] Figure 3 When the solenoid valve is in the closed state Figure 2 Sectional view of section AA;

[0019] Figure 4 When the solenoid valve is in the open state Figure 2 Sectional view of section AA;

[0020] Figure 5 yes Figure 3 Sectional view of the middle BB section;

[0021] Figure 6 yes Figure 4 Sectional view of the CC section;

[0022] In the figure: 1, vertical core cylinder, 10, fixed block, 11, connecting hole, 12, upper cover, 13, lower cover, 2, horizontal core cylinder, 3, valve core, 31, guide hole, 32, matching hole, 33, slide groove, 34, rotary groove, 4, push rod, 41, slider, 5, moving iron core, 6, coil, 7, telescopic rod, 71, outer rod, 72, bent pipe, 73, first spring, 8, bearing, 9, second spring. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0028] The utility model discloses an anti-leakage solenoid valve. Figure 1-Figure 6 As shown, it comprises a vertical cylindrical vertical core tube 1, and two tubular horizontal core tubes 2 are respectively arranged on the left and right sides of the vertical core tube 1, and the vertical core tube 1 and the horizontal core tube 2 are internally connected to each other. The upper end of the vertical core tube 1 is connected to an upper cover 12 by bolts, and the lower end of the vertical core tube 1 is connected to a lower cover 13 by bolts.

[0029] A valve core 3 capable of rotating relative to the vertical core tube 1 is coaxially arranged inside the vertical core tube 1. A flow guide hole 31 penetrating the valve core 3 in the horizontal direction is arranged on the valve core 3, and two connecting holes 11 capable of connecting the two ends of the flow guide hole 31 are symmetrically arranged on the side walls on the left and right sides of the vertical core tube 1. The left and right connecting holes 11 are respectively connected to the interiors of the left and right horizontal core tubes 2, that is, the interior of the vertical core tube 1 is respectively connected to the interiors of the two horizontal core tubes 2 through the two connecting holes 11. Furthermore, in order to ensure good flowability of the solenoid valve when it is in the open state, the diameter of the connecting hole 11 is set not less than the diameter of the flow guide hole 31. In this embodiment, Figure 2 As shown, the transverse core tube 2 is a circular tubular structure coaxially arranged with the connecting hole 11 . Similarly, in order to ensure good flowability of the solenoid valve when it is open, its inner diameter is not less than the diameter of the connecting hole 11 .

[0030] like Figure 3 and Figure 4 As shown, the valve core 3 is connected to a push rod 4 that can move up and down, and the valve core 3 rotates as the push rod 4 moves up and down. Specifically, the push rod 4 is a cylindrical structure, and the upper end of the push rod 4 is connected to a moving iron core 5 vertically arranged in the vertical core tube 1, and the moving iron core 5 is provided with a coil 6. Specifically, the coil 6 is sleeved outside the vertical core tube 1. The upper surface of the valve core 3 is provided with a matching hole 32 that is coaxially arranged with it and adapted to the push rod 4. The lower end of the push rod 4 is always located in the matching hole 32, and the matching hole 32 is located above the guide hole 31. A slider 41 is provided at the lower part of the side wall of the push rod 4, and a spiral slide groove 33 adapted to the slider 41 is provided on the inner wall of the matching hole 32. As the push rod 4 moves up and down, the slider 41 slides in the slide groove 33.

[0031] When the push rod 4 moves up and down, the valve core 3 rotates under the action of the slider 41 and the slide groove 33. When the push rod 4 moves downward to the lowest end, the valve core 3 rotates to make the two ends of the guide hole 31 connect to the two connecting holes 11 respectively; when the push rod 4 moves upward to the highest end, the valve core 3 rotates to make the two ends of the guide hole 31 misaligned and disconnected from the two connecting holes 11. In the present utility model, the gap between the valve core 3 and the inner wall of the vertical core tube 1 is matched. The specific matching gap is based on the fact that the valve core 3 can rotate in the vertical core tube 1 with the up and down movement of the push rod 4 and can close the left and right connecting holes 11 of the vertical core tube 1 when the guide hole 31 is misaligned and disconnected from the connecting hole 11. No specific limitation is made here.

[0032] Furthermore, in this embodiment, when the push rod 4 moves upward to the uppermost end, the central axes of the guide hole 31 and the connecting hole 11 are perpendicular to each other, that is, when the push rod 4 moves from the uppermost end to the lowermost end, the valve core 3 rotates 90°. Therefore, if the push rod 4 moves upward but has not yet reached the uppermost end, as long as the valve core 3 rotates to make the guide hole 31 and the connecting hole 11 misaligned and disconnected, the internal fluid channel of the solenoid valve can be effectively blocked to close the solenoid valve, effectively ensuring the good sealing performance of the solenoid valve.

[0033] Furthermore, the uppermost end of the slide groove 33 is located below the upper surface of the valve core 3, that is, the slider 41 cannot move upward out of the slide groove 33, effectively realizing that the lower end of the push rod 4 is always located in the matching hole 32, thereby ensuring the stability of the solenoid valve. Furthermore, two sliders 41 are provided, symmetrically arranged on both sides of the push rod 4, and the inner wall of the matching hole 32 is provided with two spiral slide grooves 33 corresponding to the two sliders 41, and the two slide grooves 33 are arranged in the same rotation direction.

[0034] like Figure 3-Figure 6 As shown, the side wall of the valve core 3 is provided with a revolving groove 34 extending along its circumference, and the revolving groove 34 is arranged above or below the guide hole 31. In this embodiment, the revolving groove 34 is arranged below the guide hole 31 for specific description. An arc-shaped telescopic rod 7 with its center on the central axis of the valve core 3 is arranged in the revolving groove 34, and one end of the telescopic rod 7 is fixedly connected to the side wall of the revolving groove 34, and the other end is fixedly connected to the inner wall of the vertical core tube 1. When the push rod 4 is at the uppermost end, the telescopic rod 7 is subjected to the least force and deformation or is not subjected to force. When the push rod 4 moves downward, the force and deformation (retraction or stretching) of the telescopic rod 7 gradually increases. When the push rod 4 is at the lowermost end, the telescopic rod 7 is subjected to the maximum force and deformation.

[0035] Specifically, the telescopic rod 7 includes an arc-shaped outer rod 71 and an arc-shaped curved tube 72 with an open end, the curved tube 72 is fixedly connected to the inner wall of the vertical core tube 1, a first spring 73 is arranged along its length direction in the curved tube 72, one end of the first spring 73 is fixedly connected to the inner wall of the curved tube 72, one end of the outer rod 71 is slidably arranged in the curved tube 72 and fixedly connected to the other end of the first spring 73, and the other end of the outer rod 71 is fixedly connected to the side wall of the rotary groove 34. Further, the rotary groove 34 is an annular groove along the circumference of the valve core 3, and the cross-section of the side wall of the rotary groove 34 is a horizontal U-shaped structure. In this embodiment, a fixed block 10 is arranged in the rotary groove 34, and the other end of the outer rod 71 is fixedly connected to the fixed block 10, that is, the other end of the outer rod 71 is connected to the side wall of the rotary groove 34 through the fixed block 10.

[0036] When the push rod 4 is at the uppermost end, the first spring 73 is deformed to the minimum or is not stressed, and when the push rod 4 is at the lowermost end, the first spring 73 is deformed to the maximum. Specifically, the first spring 73 is a compression spring. When the push rod 4 is at the uppermost end, the first spring 73 is not stressed or is compressed to the minimum length when stressed, and when the push rod 4 is at the lowermost end, the first spring 73 is compressed to the maximum length when stressed. Of course, the first spring 73 can also be a tension spring. When the push rod 4 is at the uppermost end, the first spring 73 is not stressed or is stretched to the minimum length when stressed, and when the push rod 4 is at the lowermost end, the first spring 73 is stretched to the maximum length when stressed. In this embodiment, the first spring 73 is specifically introduced by taking a compression spring as an example.

[0037] A second spring 9 is provided in the vertical core tube 1 above the moving iron core 5. The lower end of the second spring 9 is fixedly connected to the upper end of the moving iron core 5, and the upper end is fixedly connected to the upper cover 12. Specifically, the second spring 9 is a tension spring. When the moving iron core 5 is located at the uppermost end, the second spring 9 is in a normal contracted state or a slightly stretched state (due to the deadweight of the moving iron core 5 and the push rod 4, the first spring 73 and the second spring 9 may be slightly deformed. The specific deformation will vary depending on the structural performance of the selected springs, and no specific restrictions are made here). When the moving iron core 5 is located at the lowermost end, the second spring 9 is in a stretched state with the maximum deformation. When the first spring 73 rotates the valve core 3 back, the rotation of the valve core 3 drives the push rod 4 and the moving iron core 5 to move upward. The second spring 9 can assist the first spring 73 in moving the push rod 4 and the moving iron core 5 upward, further ensuring the stability of the electromagnetic valve.

[0038] A bearing 8 is provided in the vertical core tube 1 below the valve core 3 , the outer ring of the bearing 8 is connected to the inner wall of the vertical core tube 1 or the lower cover 13 , the inner ring of the bearing 8 is connected to the valve core 3 , and the outer ring of the bearing 8 does not contact the valve core 3 , and the inner ring of the bearing 8 does not contact the lower cover 13 .

[0039] When the coil 6 is not energized, Figure 3 As shown, the moving iron core 5 and the push rod 4 are located at the uppermost position under the action of the second spring 9 and the first spring 73. At this time, the central axis of the guide hole 31 and the connecting hole 11 are perpendicular to each other, and the first spring 73 is in an extended state ( Figure 5 ), whose unloaded or loaded compressed length is the smallest.

[0040] When the coil 6 is energized, the push rod 4 follows the moving iron core 5 to descend, the second spring 9 is deformed gradually due to the tension, the valve core 3 rotates under the action of the slider 41 and the slide groove 33, and the first spring 73 is compressed and deformed gradually. Figure 4 As shown, until the push rod 4 drops to the lowest position, the valve core 3 rotates until the guide hole 31 is connected to the connecting hole 11, that is, the two ends of the solenoid valve are connected. At this time, the first spring 73 is compressed to the shortest state ( Figure 6 ), the second spring 9 is stretched to its longest state ( Figure 4 ).

[0041] When the coil 6 is powered off, the valve core 3 rotates back under the elastic force recovery of the first spring 73, and the push rod 4 moves upward under the action of the slider 41 and the slide groove 33 and the elastic force recovery of the second spring 9. The valve core 3 rotates back until the guide hole 31 and the connecting hole 11 are interlaced and disconnected, which can effectively close the fluid channel to close the solenoid valve. Under the action of the first spring 73 and the second spring 9, the push rod 4 moves upward to the uppermost end, and the valve core 3 rotates back 90° until the central axes of the guide hole 31 and the connecting hole 11 are perpendicular to each other. Since the solenoid valve can be effectively closed by rotating the valve core 3 back until the guide hole 31 and the connecting hole 11 are interlaced and disconnected, if the elasticity of the first spring 73 or the second spring 9 is reduced, the push rod 4 can only move upward a certain distance, that is, the valve core 3 can only rotate back a certain angle (less than 90°), and the push rod 4 cannot rise to the highest position after the coil 6 is powered off, that is, the valve core 3 cannot be rotated back until the central axes of the guide hole 31 and the connecting hole 11 are perpendicular to each other, and the solenoid valve can still be effectively closed.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A leakage-proof solenoid valve, characterized in that: The invention comprises a vertically arranged cylindrical vertical core tube (1), wherein a valve core (3) capable of rotating relative to the vertical core tube (1) is coaxially arranged inside the vertical core tube (1), a flow guide hole (31) penetrating the valve core (3) in a horizontal direction is arranged on the valve core (3), and two connecting holes (11) capable of respectively connecting the two ends of the flow guide hole (31) are symmetrically opened on the side walls on the left and right sides of the vertical core tube (1), and the valve core (3) is connected to a push rod (4) capable of moving up and down, and the valve core (3) moves up and down with the push rod (4). The push rod (4) is a cylindrical structure. The upper surface of the valve core (3) is provided with a matching hole (32) which is coaxially arranged with the valve core (3) and matches the push rod (4). The matching hole (32) is located above the guide hole (31). A slider (41) is provided at the lower part of the side wall of the push rod (4). The inner wall of the matching hole (32) is provided with a spiral slide groove (33) which matches the slide groove (41). The slide groove (41) is slidably located in the slide groove (33).

2. The anti-leakage solenoid valve according to claim 1, characterized in that: When the push rod (4) moves downward to the lowest end, the valve core (3) rotates until the two ends of the guide hole (31) are respectively connected to the two connecting holes (11); when the push rod (4) moves upward to the highest end, the valve core (3) rotates until the two ends of the guide hole (31) are misaligned and not connected to the two connecting holes (11).

3. The anti-leakage solenoid valve according to claim 2, characterized in that: It also comprises a moving iron core (5) vertically arranged in the vertical core tube (1) and a coil (6) sleeved outside the moving iron core (5), wherein the lower end of the moving iron core (5) is connected to the upper end of the top rod (4).

4. The anti-leakage solenoid valve according to claim 3, characterized in that: The side wall of the valve core (3) is provided with a revolving groove (34) extending along its circumferential direction, and an arc-shaped telescopic rod (7) with its center located on the central axis of the valve core (3) is arranged in the revolving groove (34), and one end of the telescopic rod (7) is fixedly connected to the side wall of the revolving groove (34), and the other end is fixedly connected to the inner wall of the vertical core tube (1).

5. The anti-leakage solenoid valve according to claim 4, characterized in that: The telescopic rod (7) comprises an arc-shaped outer rod (71) and an arc-shaped curved tube (72) with an open end, the curved tube (72) being fixedly connected to the inner wall of the vertical core tube (1), a first spring (73) being arranged along the length direction thereof is arranged inside the curved tube (72), one end of the first spring (73) being fixedly connected to the inner wall of the curved tube (72), one end of the outer rod (71) being slidably arranged inside the curved tube (72) and fixedly connected to the other end of the first spring (73), and the other end of the outer rod (71) being fixedly connected to the side wall of the rotary groove (34).

6. The anti-leakage solenoid valve according to claim 5, characterized in that: When the push rod (4) is located at the uppermost end, the first spring (73) is minimally deformed or is not stressed, and when the push rod (4) is located at the lowermost end, the first spring (73) is maximally deformed.

7. The anti-leakage solenoid valve according to claim 3, characterized in that: A second spring (9) located above the moving iron core (5) is provided in the vertical core tube (1), wherein the lower end of the second spring (9) is fixedly connected to the upper end of the moving iron core (5), and the upper end of the second spring (9) is fixedly connected to the upper end of the vertical core tube (1).

8. The anti-leakage solenoid valve according to claim 1, characterized in that: A bearing (8) located below the valve core (3) is provided in the vertical core tube (1); an outer ring of the bearing (8) is connected to the vertical core tube (1); an inner ring of the bearing (8) is connected to the valve core (3); and the outer ring of the bearing (8) does not contact the valve core (3).

9. The anti-leakage solenoid valve according to claim 1, characterized in that: Two tubular transverse core tubes (2) are respectively provided on the left and right sides of the vertical core tube (1), and the left and right connecting holes (11) of the vertical core tube (1) are respectively connected to the insides of the left and right transverse core tubes (2).

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