Manual stepless limit regulator of valve

Abstract

The utility model relates to a manual stepless limit regulator for a valve, which can limit the closing position of the manual valve and continuously adjust the opening position of the manual valve, is convenient to operate, and comprises a valve cover connected with a valve body, and a hand wheel is mounted at the top end, positioned outside the valve cover, of a valve rod; the base is positioned outside the valve rod and is in threaded connection with the valve cover; the indicating ring is sleeved outside the valve rod, the indicating ring is fixed on the base, and the top limiting piece is in threaded connection with the lower end of the hand wheel; the lower end of the transparent adjustable limiting piece is in threaded connection with the base, and the position of the adjustable limiting piece corresponds to that of the indicating ring; and the anti-falling ring is annularly installed outside the upper end of the base, and the anti-falling ring is located below the adjustable limiting piece and limits the moving position of the adjustable limiting piece, so that the adjustable limiting piece does not move upwards after reaching the highest position.

Description

Technical Field

[0001] The present application belongs to the technical field of diaphragm valves, and in particular relates to a manual stepless limit regulator for valves. Background Art

[0002] The traditional switch can only control the opening and closing of the diaphragm valve, but cannot accurately adjust the valve opening, and cannot accurately limit the closing position and the maximum opening position of the diaphragm valve. The diaphragm valve seal is made of polytetrafluoroethylene / ethylene propylene diene monomer, which is relatively soft. When it reaches the closed position, it should not be pressed down any further. If the external force continues to press down, the diaphragm seal will be compressed and cannot be restored, thereby affecting the sealing performance. Conversely, when the diaphragm valve is in the open position, it cannot exceed the maximum stretching position of the diaphragm, otherwise the diaphragm will be stretched and extended, making it irreversible, and then lose its sealing performance. Therefore, the traditional switch is not perfectly suitable for diaphragm valves. Utility Model Content

[0003] The utility model provides a manual stepless limit regulator for a valve, which can realize the limit of the closing position of the manual valve and the continuous adjustment of the opening position, and is convenient to operate.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A manual stepless limit regulator for a valve comprises a valve cover connected to a valve body, and further comprises:

[0006] A valve stem, one end of which is threadedly connected to the valve cover, and one end of which is located in the valve cover is connected to the valve plate of the diaphragm valve;

[0007] A hand wheel, the hand wheel being mounted on the top end of the valve stem outside the valve cover;

[0008] A base, the base is located outside the valve stem and is threadedly connected to the valve cover;

[0009] Indicator ring, the indicator ring is sleeved on the outside of the valve stem, the indicator ring is fixed on the base, the outer surface of the indicator ring is red, and the red color can be seen from the outside, indicating that the valve is open, and the red color cannot be seen from the outside, indicating that the valve is closed;

[0010] A top stopper, wherein the top stopper is threadedly connected to the lower end of the hand wheel;

[0011] A transparent adjustable stopper, the lower end of which is threadedly connected to the base, and the adjustable stopper corresponds to the position of the indicator ring;

[0012] The anti-slip ring is located outside the base and is threadedly connected to the lower side of the adjustable limiter to limit the uppermost moving position of the adjustable limiter so that the adjustable limiter will no longer move upward after reaching the uppermost position.

[0013] Furthermore, it also includes a closing limit tooth piece, which is engaged with the hand wheel through a toothed profile and connected to the valve stem through a thread on the valve stem to ensure that the relative position with the valve stem remains unchanged.

[0014] Furthermore, a protrusion facing the base is provided at the lower end of the anti-slip ring, and the protrusion is located below the adjustable limiter.

[0015] Furthermore, the handwheel is connected to the valve stem via an internal square opening, and the valve stem is connected to the handwheel via screws to ensure that the relative position of the handwheel and the valve stem remains unchanged.

[0016] Furthermore, a connecting ring is provided below the hand wheel and around the valve stem, an external thread is provided on the outside of the connecting ring, and an internal thread which is threadedly connected to the external thread of the connecting ring is provided on the inner surface of the top limiter.

[0017] Furthermore, a scale line indicating the valve position is provided on the outside of the base, and the scale line is set lower than the anti-slip ring, indicating the maximum opening position of the valve.

[0018] The beneficial effects of the utility model are:

[0019] Holding the handwheel drives the valve stem to move downward, and the closing limit piece moves downward with the valve stem. When it reaches the closed position, the bottom of the closing limit tooth piece is in hard contact with the base. At this time, the handwheel cannot be turned downward. When the valve opens upward, it reaches the maximum opening position of the valve set by the adjustable limit piece. The bottom of the top limit piece is in hard contact with the inner wall of the adjustable limit piece. At this time, the handwheel cannot be turned upward. The indicator ring is used to observe the opening and closing status of the valve. They are used in conjunction with each other to achieve continuous adjustment of the valve opening limit and external operation. There is no need to disassemble the handwheel or valve accessories, which greatly facilitates customer operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the main structure of an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of a top view of the structure of an embodiment of the present application;

[0023] Figure 3 This is an embodiment of the present application Figure 2 Schematic diagram of the AA section structure;

[0024] The reference numerals in the figure are:

[0025] 1. Handwheel, 2. Closing limit gear, 3. Top limit, 4. Indicator ring, 5. Adjustable limit, 6. Anti-slip ring, 7. Base, 8. Valve cover, 9. Valve stem, 10. Screw, 11. Scale line, 12. Protrusion, 13. Connecting ring, 14. External thread, 15. Internal thread. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the present utility model, unless otherwise specified, "multiple" means two or more.

[0028] 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 by specific circumstances.

[0029] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] Example

[0031] This embodiment provides a manual stepless limit regulator for a valve, including a valve cover 8 connected to a valve body, and also including:

[0032] A valve stem 9, one end of which is threadedly connected to the valve cover 8, and one end of which is located in the valve cover 8 is connected to the valve plate of the diaphragm valve;

[0033] Handwheel 1, handwheel 1 is installed at the top of valve stem 9 outside valve cover 8, handwheel 1 and valve stem 9 are connected through internal square opening, and there is a quadrilateral installation opening for valve stem installation inside the handwheel, preferably a square to avoid mutual displacement, and valve stem 9 is connected to handwheel 1 through screw 10 to achieve the unchanged relative position of handwheel 1 and valve stem 9;

[0034] The base 7 is fixed on the valve cover 8, and then sleeved on the valve stem 1, and is threadedly connected with the upper end of the valve cover 8, indicating the maximum opening position of the valve;

[0035] Indicator ring 4, which is sleeved on the outside of valve stem 9 and fixed on base 7. The outer surface of indicator ring 4 is red. If the red color can be seen from the outside, it means the valve is open. If the red color is not visible from the outside, it means the valve is closed.

[0036] A top stopper 3, the top stopper 3 is threadedly connected to the lower end of the hand wheel 1;

[0037] A transparent adjustable stopper 5, the lower end of which is threadedly connected to the base 7, the adjustable stopper 5 corresponds to the position of the indicator ring 4, and the adjustable stopper 5 is not connected to the top stopper 3;

[0038] The anti-slip ring 6 is located outside the upper end of the base 7 and is threadedly connected below the adjustable limiter 5 to limit the moving position of the adjustable limiter 5 so that the adjustable limiter 5 will no longer move upward after reaching the highest position.

[0039] The outside of the base 7 is provided with a scale line 11 indicating the valve position. The scale line 11 is set lower than the anti-drop ring 6 and does not block the scale line 11, which is easy for people to read. The scale line 11 indicates the maximum opening position of the valve.

[0040] As an embodiment of the utility model, in addition to the above structure, it also includes a closing limit gear 2, which engages with the hand wheel 1 through a toothed profile and is connected to the valve stem 9 through a thread on the valve stem 9 to ensure that the relative position with the valve stem 9 remains unchanged.

[0041] As an embodiment of the utility model, in addition to the above structure, a protrusion 12 facing the base 7 is provided at the lower end of the anti-slip ring 6 , and the protrusion 12 is located below the adjustable limiter 5 .

[0042] As an embodiment of the present utility model, in addition to the above structure, a connecting ring 13 is provided under the hand wheel 1 and around the valve stem 9, an external thread 14 is provided on the outside of the connecting ring 13, and an internal thread 15 is provided on the inner surface of the top limit member 3 for threaded connection with the external thread of the connecting ring 13. All threaded connections in the present utility model are similar to this type and will not be described again.

[0043] When the utility model is implemented:

[0044] When the valve is closed downward, the closing limit tooth piece 2 moves downward with the valve stem 9. When it reaches the closed position, the bottom of the closing limit tooth piece 2 is in hard contact with the base 7, and the hand wheel can no longer be turned downward; when the valve is opened upward, it reaches the maximum valve opening position set by the adjustable limit piece 5, and the bottom of the top limit piece 3 is in hard contact with the inner wall of the adjustable limit piece 5, and the hand wheel can no longer be turned upward.

[0045] Based on the above ideal embodiments of this application, the relevant staff can make various changes and modifications without departing from the technical concept of this application through the above description. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A manual stepless limit regulator for a valve, comprising a valve cover connected to a valve body, characterized in that: Also includes, A valve stem, one end of which is threadedly connected in the valve cover; A hand wheel, the hand wheel being mounted on the top end of the valve stem outside the valve cover; A base, the base is located outside the valve stem and is threadedly connected to the valve cover; An indicator ring, which is sleeved on the outside of the valve stem and fixed on the base to play an indicating role; A top stopper, wherein the top stopper is threadedly connected to the lower end of the hand wheel; A transparent adjustable stopper, the lower end of which is threadedly connected to the base, and the adjustable stopper corresponds to the position of the indicator ring; The anti-slip ring is located outside the upper end of the base and is threadedly connected to the lower side of the adjustable limiter to limit the moving position of the adjustable limiter.

2. A manual stepless limit regulator for a valve according to claim 1, characterized in that: It also includes a closing limit tooth piece, which is engaged with the hand wheel through a toothed profile and connected to the valve stem through a thread on the valve stem to ensure that the relative position with the valve stem remains unchanged.

3. A manual stepless limit regulator for a valve according to claim 2, characterized in that: A protrusion facing the base is provided at the lower end of the anti-slip ring, and the protrusion is located below the adjustable limiter.

4. A manual stepless limit regulator for a valve according to claim 1, characterized in that: The hand wheel is connected to the valve stem through an internal square opening, and the valve stem is connected to the hand wheel through screws.

5. The manual stepless limit regulator for a valve according to claim 1, characterized in that: A connecting ring is provided below the hand wheel and around the valve stem. An external thread is provided on the outside of the connecting ring. An internal thread matching with the external thread of the connecting ring is provided on the inner surface of the top stopper.

6. A manual stepless limit regulator for a valve according to claim 1, characterized in that: The base is provided with a scale line indicating the valve position on the outside, and the scale line is set lower than the anti-slip ring.

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