Valve hand wheel self-locking structure

Abstract

The utility model discloses a valve hand wheel self-locking structure, and relates to the technical field of valve hand wheels. The valve comprises a valve rod and a box body, the valve rod is rotationally inserted into the box body, switchable self-locking mechanisms are fixedly installed in the box body and on the surface of the valve rod, a hand wheel assembly is fixedly installed at the top end of the valve rod, and a telescopic lengthening rod is arranged in the hand wheel assembly to assist in rotating the hand wheel assembly and the valve rod. The rotary direction of the valve rod is switched through the switchable self-locking mechanism, when the valve rod is rotated through the hand wheel assembly through the switchable self-locking mechanism, the valve rod can be self-locked when rotating, and the movable part of the telescopic extension rod on the surface of the hand wheel assembly extends out of the interior of the hand wheel assembly, so that the valve rod can be self-locked. And therefore, the hand wheel assembly and the valve rod can be rotated through the movable part of the telescopic lengthening rod, and more labor is saved when the hand wheel assembly is rotated.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve hand wheel technical field, concretely relates to a valve hand wheel self locking structure. BACKGROUND

[0002] Valve hand wheel refers to the rotating part for manually operating valve opening and closing. By manually rotating the valve hand wheel, the opening degree of the valve can be controlled, and the flow of fluid can be adjusted.

[0003] The Chinese patent with publication number CN221762759U discloses a valve hand wheel self locking structure, which comprises a main body unit, a first self locking unit and a second self locking unit arranged in the main body unit, and a rotating unit arranged above the main body unit.

[0004] For the above-mentioned disclosed technology, in the existing valve operation, in order to reduce the torque requirement when rotating the valve hand wheel, people may install an extension rod on the threads of the valve hand wheel to achieve labor-saving operation. However, this method increases the burden of carrying additional tools for the operator during use in actual application. In addition, the extension rod usually needs to be stored and managed additionally, which is particularly troublesome for the operator in the case of frequent movement.

[0005] Therefore, a valve hand wheel self locking structure is proposed. CONTENT OF THE UTILITY MODEL

[0006] The utility model discloses the purpose is: for solving the problem proposed in the above background art, the utility model provides a valve hand wheel self locking structure.

[0007] The utility model discloses the purpose in order to realize the above-mentioned specific adoption following technical scheme:

[0008] A valve hand wheel self locking structure, comprising a valve stem and a box body, and the valve stem is rotatably inserted into the box body, a switchable self locking mechanism is fixedly installed on the inside of the box body and the surface of the valve stem, a hand wheel assembly is fixedly installed on the top end of the valve stem, and a telescopic extension rod is arranged in the hand wheel assembly to assist in rotating the hand wheel assembly and the valve stem, the switchable self locking mechanism comprises a ratchet wheel fixedly sleeved on the surface of the valve stem, a rotating shaft is rotatably inserted into the upper and lower side walls of the box body, a switch handle is fixedly sleeved on the top end of the rotating shaft, and the switch handle is located outside the box body, a pawl is fixedly sleeved on the surface of the rotating shaft, a spring is fixedly installed on the inside wall of one side of the box body, a protrusion is fixedly installed on the end of the spring, and the protrusion and the inside bottom of the box body are slidingly installed.

[0009] Further, a threaded hole is formed in the bottom end of the valve stem, and a connecting flange is fixedly installed on the bottom end of the valve stem through bolts.

[0010] Further, the hand wheel assembly comprises a hand wheel body fixedly installed at the top end of the valve rod, and a convex shaft is fixedly installed on the top surface of the hand wheel body, a surface of the convex shaft is rotatably sleeved with a gripping sleeve ring, and a plurality of groups of receiving cavities are formed in the surface of the hand wheel body.

[0011] Further, the telescopic lengthening rod comprises a threaded rod fixedly installed on one side wall of the receiving cavity, a groove is formed in the surface of the threaded rod, a limiting ring is movably sleeved on the surface of the threaded rod and the groove, an internally-threaded sleeve rod is rotatably installed on the end surface of the limiting ring, the internally-threaded sleeve rod is threadedly sleeved with the surface of the threaded rod, and a knob is fixedly installed on the end portion of the internally-threaded sleeve rod.

[0012] Further, the surface of the pawl is provided with two symmetrically arranged arc grooves, and when the position of the switching shaft is switched, the convex block is in plug-in abutting connection with the arc grooves on the surface of the pawl.

[0013] The beneficial effects of the utility model are as follows:

[0014] The rotation direction of the switching valve rod is switched through the switchable self-locking mechanism, the valve rod is rotated through the hand wheel assembly, the valve rod is self-locked during rotation, the movable part of the telescopic lengthening rod on the surface of the hand wheel assembly is extended from the inside of the hand wheel assembly, the hand wheel assembly and the valve rod can be rotated through the movable part of the telescopic lengthening rod, and the hand wheel assembly is more labor-saving during rotation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 is the rear view of the utility model;

[0017] Figure 3 is the local downward sectional view of the utility model;

[0018] Figure 4 is the schematic diagram of the valve rod of the utility model;

[0019] Figure 5 is the sectional view of the hand wheel assembly of the utility model;

[0020] Figure 6 is the explosion view of the telescopic lengthening rod of the utility model;

[0021] Label: 1, valve stem; 2, box; 3, switchable self-locking mechanism; 301, ratchet wheel; 302, rotating shaft; 303, switching handle; 304, pawl; 305, spring; 306, protruding block; 4, connecting flange; 5, hand wheel assembly; 501, hand wheel body; 502, protruding shaft; 503, gripping collar; 504, accommodating cavity; 6, telescopic extension rod; 601, threaded rod; 602, groove; 603, limiting ring; 604, internally threaded sleeve rod; 605, knob. DETAILED DESCRIPTION

[0022] To make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be a clear and complete description of the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0024] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present application, it should be noted that the directions or position relationships indicated by the terms "inner", "outer", "upper", etc. are based on the directions or position relationships shown in the drawings, or the directions or position relationships of the present application product when it is usually placed, which are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular direction, be constructed and operated in a particular direction, therefore, cannot be understood as a limitation on the present application.

[0026] As Figures 1 to 6As shown, a valve hand wheel self-locking structure, including a valve stem 1 and a box body 2, and the valve stem 1 is rotatably inserted on the box body 2, the inside of the box body 2 and the surface of the valve stem 1 are fixedly installed with a switchable self-locking mechanism 3, the top end of the valve stem 1 is fixedly installed with a hand wheel assembly 5, and the inside of the hand wheel assembly 5 is provided with a telescopic extension rod 6 to assist in rotating the hand wheel assembly 5 and the valve stem 1. More specifically, by the switchable self-locking mechanism 3, the rotating direction of the valve stem 1 is switched, and by the switchable self-locking mechanism 3, when the valve stem 1 is rotated by the hand wheel assembly 5, the valve stem 1 can be self-locked when rotating. The movable part of the telescopic extension rod 6 on the surface of the hand wheel assembly 5 extends out of the inside of the hand wheel assembly 5, so that the hand wheel assembly 5 and the valve stem 1 can be rotated by the movable part of the telescopic extension rod 6, and more labor-saving when rotating the hand wheel assembly 5.

[0027] The bottom end of the valve stem 1 is provided with a threaded hole, and the bottom end of the valve stem 1 is fixedly installed with a connecting flange 4 by bolts. More specifically, the connecting flange 4 is installed on the end of the valve stem 1 by bolts, and the connecting flange 4 fixedly installed on the end of the valve stem 1 can be connected with the stem of the valve core.

[0028] The switchable self-locking mechanism 3 includes a ratchet wheel 301 fixedly sleeved on the surface of the valve stem 1, a rotating shaft 302 rotatably inserted on the upper and lower side walls of the box body 2, and the top end of the rotating shaft 302 is fixedly sleeved with a switch handle 303, the switch handle 303 is located outside the box body 2, the surface of the rotating shaft 302 is fixedly sleeved with a pawl 304, one side of the inner wall of the box body 2 is fixedly installed with a spring 305, and the end of the spring 305 is fixedly installed with a protrusion 306, the protrusion 306 and the inside bottom of the box body 2 are slidably installed. More specifically, the pawl 304 is rotated by the switch handle 303, so that the end of the pawl 304 is clamped with the teeth of the ratchet wheel 301, so that the hand wheel assembly 5 can only rotate in one direction when rotating the valve stem 1, and the rotating shaft 302 and the pawl 304 are rotated by the switch handle 303, so that the position of the pawl 304 can be switched, and the direction of the hand wheel assembly 5 rotating the valve stem 1 can be switched.

[0029] The hand wheel assembly 5 includes a hand wheel body 501 fixedly installed on the top end of the valve stem 1, and the top surface of the hand wheel body 501 is fixedly installed with a convex shaft 502, the surface of the convex shaft 502 is rotatably sleeved with a gripping sleeve ring 503, and the surface of the hand wheel body 501 is provided with a plurality of groups of receiving cavities 504. More specifically, the gripping sleeve ring 503 is rotatably installed on the top surface of the hand wheel body 501 by the convex shaft 502, so that the hand wheel body 501 and the valve stem 1 can be rotated.

[0030] The telescopic lengthening rod 6 comprises a threaded rod 601 fixedly installed on one side wall of the accommodating cavity 504, and a groove 602 is formed on the surface of the threaded rod 601, a limiting ring 603 is movably sleeved on the surface of the threaded rod 601 and the groove 602, an internally-threaded sleeve rod 604 is rotatably installed on the end surface of the limiting ring 603, the internally-threaded sleeve rod 604 is in threaded sleeve connection with the surface of the threaded rod 601, and a knob 605 is fixedly installed on the end portion of the internally-threaded sleeve rod 604.

[0031] The surface of the pawl 304 is provided with two symmetrical arc grooves, and the protrusion 306 of the switching shaft 302 is in plug-in abutting connection with the surface arc groove of the pawl 304 when the position of the switching shaft 302 is switched.

[0032] In summary, the rotation direction of the switching valve rod 1 is switched through the switchable self-locking mechanism 3, the valve rod 1 is self-locked during rotation through the switchable self-locking mechanism 3 when the valve rod 1 is rotated through the hand wheel assembly 5, the movable part of the telescopic lengthening rod 6 on the surface of the hand wheel assembly 5 is extended out of the interior of the hand wheel assembly 5, and thus the hand wheel assembly 5 and the valve rod 1 can be rotated through the movable part of the telescopic lengthening rod 6, and the hand wheel assembly 5 is more labor-saving during rotation.

[0033] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only the principles of the utility model. The utility model can have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope required by the utility model is defined by the appended claims and their equivalents.

Claims

1. A self-locking structure for a valve handwheel, characterized in that, The device includes a valve stem (1) and a housing (2), with the valve stem (1) rotatably inserted into the housing (2). A switchable self-locking mechanism (3) is fixedly installed inside the housing (2) and on the surface of the valve stem (1). A handwheel assembly (5) is fixedly installed at the top of the valve stem (1), and a telescopic extension rod (6) is provided inside the handwheel assembly (5) to assist in rotating the handwheel assembly (5) and the valve stem (1). The switchable self-locking mechanism (3) includes a ratchet (301) fixedly sleeved on the surface of the valve stem (1). The upper and lower side walls of the housing (2) are rotatably connected to a rotating shaft (302), and a switching handle (303) is fixedly sleeved on the top of the rotating shaft (302). The switching handle (303) is located outside the housing (2). A pawl (304) is fixedly sleeved on the surface of the rotating shaft (302). A spring (305) is fixedly installed on one side of the inner wall of the housing (2), and a protrusion (306) is fixedly installed at the end of the spring (305). The protrusion (306) and the inner bottom of the housing (2) are slidably installed.

2. The valve handwheel self-locking structure according to claim 1, characterized in that, The bottom end of the valve stem (1) is provided with a threaded hole, and the bottom end of the valve stem (1) is fixedly installed with a connecting flange (4) by bolts.

3. The valve handwheel self-locking structure according to claim 1, characterized in that, The handwheel assembly (5) includes a handwheel body (501) fixedly installed on the top of the valve stem (1), and a convex shaft (502) is fixedly installed on the top surface of the handwheel body (501). A gripping collar (503) is rotatably sleeved on the surface of the convex shaft (502), and a number of storage cavities (504) are opened on the surface of the handwheel body (501).

4. The valve handwheel self-locking structure according to claim 3, characterized in that, The telescopic extension rod (6) includes a threaded rod (601) fixedly installed on one side wall of the storage cavity (504), and a groove (602) is provided on the surface of the threaded rod (601). A limiting ring (603) is movably sleeved on the surface of the threaded rod (601) and the groove (602), and an internal threaded sleeve rod (604) is rotatably installed on the end face of the limiting ring (603). The internal threaded sleeve rod (604) is threadedly sleeved on the surface of the threaded rod (601), and a knob (605) is fixedly installed at the end of the internal threaded sleeve rod (604).

5. The valve handwheel self-locking structure according to claim 1, characterized in that, The surface of the pawl (304) has two symmetrically arranged arc grooves, and when the position of the rotating shaft (302) is switched, its protrusion (306) is inserted into and fits the arc groove on the surface of the pawl (304).

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