Direct-acting solenoid valve eccentric ball manual switch structure

Abstract

The utility model relates to the technical field of valves, in particular to a direct-acting electromagnetic valve eccentric ball manual switch structure which comprises a base, an eccentric manual rod, a rolling piece and an elastic element. The axis of the eccentric section deviates from the axis of the positioning section, the rolling piece makes contact with the eccentric section and ascends and descends in the rotating process of the eccentric section, and the elastic element is arranged between the rolling piece and the valve rod. According to the utility model, the eccentric rotating force of the eccentric manual rod is used for replacing manual pushing force, and the rolling matching between the rolling piece and the eccentric section is utilized, so that the acting force required by the manual switch of the electromagnetic valve is greatly reduced; meanwhile, the eccentric section swinging to the high position is collinear with the center line of the rolling piece, so that the electromagnetic valve can be kept in a manual opening position for a long time when manual force is withdrawn.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a manual switch structure for a direct-acting solenoid valve with an eccentric ball bearing. Background Technology

[0002] A direct-acting solenoid valve is an industrial device that uses electromagnetic force to directly drive the valve core, thereby controlling the opening and closing of the valve. Its working principle is as follows: when the coil is energized, the solenoid valve coil generates electromagnetic force that lifts the valve core from the valve seat, opening the valve; when the power is off, the electromagnetic force disappears, and the return spring presses the valve core back onto the valve seat, closing the valve. Generally, a manual switch is installed in solenoid valves to handle power outages or maintenance. In a typical direct-acting solenoid valve, the manual switch involves the hand directly acting on the valve stem, pushing the stem to overcome the return spring force and lift the valve core from the valve seat, thus opening the solenoid valve. However, this operation requires considerable force and cannot be automatically maintained; when the hand force is removed, the solenoid valve returns to the closed position under the action of the return spring.

[0003] In summary, the problems that need to be solved are how to reduce the force required to manually open and close the solenoid valve, and how to keep the solenoid valve in the manually open position. Utility Model Content

[0004] The technical problem to be solved by this utility model is: In order to solve the problem that in the existing direct-acting solenoid valve manual structure, the hand directly acts on the solenoid valve stem to push the valve stem to overcome the spring force of the return spring and lift the valve core from the valve seat, so that the solenoid valve opens, but this operation requires a lot of force from the hand and cannot be automatically maintained. When the force of the hand is withdrawn, the solenoid valve returns to the closed position under the action of the return spring. Now, an eccentric ball manual switch structure for direct-acting solenoid valve is provided.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a direct-acting solenoid valve eccentric ball manual switch structure, which is installed at the bottom of the valve body to drive the valve stem to rise and fall to realize the opening or closing of the valve, comprising:

[0006] The base has an internal cavity.

[0007] An eccentric manual lever is rotatably mounted in a receiving cavity and has an operating part for driving its rotation. The eccentric manual lever includes a positioning section and an eccentric section, and the axis of the eccentric section is offset from the axis of the positioning section.

[0008] A rolling element that rolls in conjunction with the eccentric section and moves up and down during the rotation of the eccentric section;

[0009] And an elastic element, which is disposed between the rolling element and the valve stem.

[0010] Furthermore, a limiting rod is installed inside the base, and the outer peripheral wall of the eccentric manual rod is recessed to form a limiting groove for the limiting rod to be engaged to limit the rotation amplitude of the eccentric manual rod.

[0011] Furthermore, the elastic element includes a disc spring and two push pads located on both sides of the disc spring, with the two ends of the disc spring respectively abutting against the two push pads.

[0012] Furthermore, the receiving cavity has an open end at one end along its axial direction to form an open end, and a closed end at the other end to form a closed end that limits the axial movement of the eccentric manual lever.

[0013] Furthermore, the operating part is located at one end of the eccentric manual lever facing the opening end, and it can be an operating groove formed by a recess or an operating protrusion formed by a protrusion.

[0014] Furthermore, the number of positioning segments is two, and the eccentric segment is located between the two positioning segments.

[0015] Furthermore, the rolling element is a ball bearing.

[0016] The beneficial effects of this utility model are as follows: This utility model uses the eccentric rotational force of the eccentric manual lever to replace the manual pushing force, and utilizes the rolling cooperation between the rolling element and the eccentric section to greatly reduce the force required for manual opening and closing of the solenoid valve. At the same time, since the eccentric section swinging to the high position is collinear with the center line of the rolling element, the solenoid valve can remain in the manual open position for a long time when the manual force is withdrawn, thus freeing up both hands and saving more effort. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model in conjunction with the valve body;

[0020] Figure 3 This is a schematic diagram of the eccentric manual lever in this utility model;

[0021] Figure 4 This is the front view of the eccentric manual lever in this utility model;

[0022] Figure 5 yes Figure 4 A cross-sectional view along the AA direction;

[0023] Figure 6 yes Figure 4 Cross-sectional view along the BB direction;

[0024] In the picture:

[0025] 1. Base; 101. Receiving cavity; 1011. Open end; 1012. Closed end;

[0026] 2. Eccentric manual lever; 201. Positioning section; 202. Eccentric section; 203. Limiting groove; 204. Operating part;

[0027] 3. Rolling parts;

[0028] 4. Disc spring;

[0029] 5. Limit rod;

[0030] 6. Push the gasket;

[0031] 7. Valve stem;

[0032] 8. Valve body;

[0033] 9. Return spring. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0035] like Figures 1-6 As shown, a direct-acting solenoid valve eccentric ball manual switch structure is installed at the bottom of the valve body 8 to drive the valve stem 7 to rise and fall to open or close the valve, comprising:

[0036] The base 1 has an internal cavity 101.

[0037] An eccentric manual lever 2 is rotatably disposed within a receiving cavity 101 and has an operating part 204 for driving its rotation. The eccentric manual lever 2 includes a positioning section 201 and an eccentric section 202 distributed along the axial direction. The axis of the eccentric section 202 is offset from the axis of the positioning section 201. During the rotation of the eccentric manual lever 2, the eccentric section 202 will swing up or down.

[0038] The rolling element 3 contacts the eccentric section 202 and moves up and down during the rotation of the eccentric section 202. When the eccentric section 202 swings upward, it pushes the rolling element 3 upward. When the eccentric section 202 swings downward, it drives the rolling element 3 downward. The rolling cooperation between the rolling element 3 and the eccentric section 202 makes the eccentric manual lever 2 rotate smoothly without jamming.

[0039] The elastic element is disposed between the rolling element 3 and the valve stem 7. The elastic force generated by the deformation of the elastic element is used to push the valve stem 7 of the direct-acting solenoid valve to move. Since the switching strokes of solenoid valves are different, the setting of the elastic element allows the manual switch to be adapted to solenoid valves with different strokes.

[0040] When the solenoid valve needs to be opened, rotate the eccentric manual lever 2, causing the eccentric section 202 to swing upward, pushing the rolling element 3 upward. When the rolling element 3 moves upward, it compresses the elastic element. When the elastic force of the elastic element is greater than the elastic force of the return spring 9 of the solenoid valve stem 7, it pushes the valve stem 7 upward to the solenoid valve open position. When the solenoid valve needs to be closed, rotate the eccentric manual lever 2, causing the eccentric section 202 to swing downward. The rolling element 3 moves downward under the action of gravity, and the solenoid valve stem 7 moves downward to the solenoid valve closed position under the action of the return spring 9. This application uses the eccentric rotational force of the eccentric manual lever 2 to replace the manual pushing force, and utilizes the rolling cooperation between the rolling element 3 and the eccentric section 202 to greatly reduce the force required for manually opening and closing the solenoid valve. At the same time, since the center line of the eccentric section 202 and the rolling element 3 are collinear when the manual force is withdrawn, the solenoid valve can remain in the manually open position for a long time, thus freeing up the hands and saving more effort.

[0041] In some examples, a limiting rod 5 is installed in the base 1. The limiting rod 5 may be, but is not limited to, a set screw. The outer peripheral wall of the eccentric manual lever 2 is recessed to form a limiting groove 203 for the limiting rod 5 to be inserted to limit the rotation range of the eccentric manual lever 2. The limiting groove 203 is an arc-shaped groove with a central angle of 90° to limit the maximum rotation angle of the eccentric manual lever 2 to 90°. The base 1 has an installation groove for the limiting rod 5 to be installed. The limiting rod 5 can extend from the installation groove and enter the limiting groove 203.

[0042] In some examples, the elastic element includes a disc spring 4 and two push pads 6 located on both sides of the disc spring 4. The number of disc springs 4 can be, but is not limited to, one, two, or three, etc., and several disc springs 4 are stacked. Different numbers of disc springs 4 can be adapted to use direct-acting solenoid valves with different stroke clearances. The two ends of the disc spring 4 respectively abut against the two push pads 6, that is, one push pad 6 is located between the rolling element 3 and the disc spring 4, and the other push pad 6 is located between the disc spring 4 and the valve stem 7. The base 1 has an installation cavity for the installation of the three, which is located between the valve cavity and the receiving cavity 101 and communicates with both.

[0043] In some examples, the receiving cavity 101 is open at one end along its axial direction to form an open end 1011, and the other end is sealed to form a closed end 1012 that limits the axial movement of the eccentric manual lever 2. The eccentric manual lever 2 enters the receiving cavity 101 from the open end 1011, and the head of the eccentric manual lever 2 has a tapered structure to facilitate entry. It is axially limited by the closed end 1012. The outer peripheral wall of the positioning section 201 fits against the cavity wall of the receiving cavity 101 to radially position the eccentric manual lever 2, thereby improving the rotational accuracy of the eccentric manual lever 2.

[0044] In some examples, the operating part 204 is located at one end of the eccentric manual lever 2 facing the opening end 1011. It can be a recessed operating groove or a protruding operating protrusion. The operating groove can be, but is not limited to, a cross groove, a slot, etc., and the operating protrusion can be, but is not limited to, a hexagonal or other cross-sectional shape. The operating tool can cooperate with the operating groove or the operating protrusion to drive the eccentric manual lever 2 to rotate.

[0045] In some examples, there are two positioning segments 201, and the eccentric segment 202 is located between the two positioning segments 201 to form a recess. The two positioning segments 201 at both ends are kept in contact with the cavity wall of the receiving cavity 101 to ensure the swing trajectory of the eccentric segment 202.

[0046] In some examples, the rolling element 3 is a ball bearing.

[0047] Working principle:

[0048] When the solenoid valve needs to be opened, rotate the eccentric manual lever 2 to make the eccentric section 202 swing upward, pushing the rolling element 3 to move upward. When the rolling element 3 moves upward, it compresses the disc spring 4. When the spring force of the disc spring 4 is greater than the spring force of the return spring 9 of the solenoid valve stem 7, it pushes the valve stem 7 to move upward to the solenoid valve open position. When the solenoid valve needs to be closed, rotate the eccentric manual lever 2 to make the eccentric section 202 swing downward. The rolling element 3 moves downward under the action of gravity, and the solenoid valve stem 7 moves downward to the solenoid valve closed position under the action of the return spring 9.

[0049] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A direct-acting electromagnetic valve eccentric ball manual switch structure, which is installed at the bottom of a valve body (8) for driving a valve rod (7) to lift to realize valve opening or closing, characterized in that: include: The base (1) has an internal cavity (101); An eccentric manual lever (2) is rotatably disposed within a receiving cavity (101) and has an operating part (204) for driving its rotation. The eccentric manual lever (2) includes a positioning section (201) and an eccentric section (202), the axis of which is offset from the axis of the positioning section (201). The rolling element (3) rolls in cooperation with the eccentric section (202) and moves up and down during the oscillation of the eccentric section (202); And an elastic element, which is disposed between the rolling element (3) and the valve stem (7).

2. The eccentric ball manual switch structure of a direct-acting electromagnetic valve according to claim 1, characterized in that: A limiting rod (5) is installed inside the base (1), and the outer peripheral wall of the eccentric manual rod (2) is recessed to form a limiting groove (203) for the limiting rod (5) to be inserted to limit the rotation amplitude of the eccentric manual rod (2).

3. The eccentric ball manual switch structure of a direct-acting electromagnetic valve according to claim 1, characterized in that: The elastic element includes a disc spring (4) and two push pads (6) located on both sides of the disc spring (4), with the two ends of the disc spring (4) respectively abutting against the two push pads (6).

4. The eccentric ball manual switch structure of a direct-acting electromagnetic valve according to claim 1, characterized in that: The receiving cavity (101) is open at one end along its axial direction to form an open end (1011), and the other end is sealed to form a closed end (1012) that limits the axial movement of the eccentric manual lever (2).

5. The eccentric ball manual switch structure of a direct-acting electromagnetic valve according to claim 4, characterized in that: The operating part (204) is located at one end of the eccentric manual lever (2) facing the opening end (1011), and it can be an operating groove formed by a recess or an operating protrusion formed by a protrusion.

6. The eccentric ball manual switch structure of a direct-acting electromagnetic valve according to claim 1, characterized in that: The number of positioning segments (201) is two, and the eccentric segment (202) is located between the two positioning segments (201).

7. The eccentric ball manual switch structure of a direct-acting electromagnetic valve according to claim 1, characterized in that: The rolling element (3) is a ball bearing.

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