Stop valve limiting device

Abstract

The utility model relates to the technical field of stop valves, in particular to a stop valve limiting device which comprises a stop valve body. The valve rod is rotationally mounted at the top of the stop valve body; the fixed disc is fixedly mounted at the top of the valve rod, and a hand wheel disc is fixedly mounted on the outer side of the fixed disc; the limiting assembly is used for limiting rotation of the valve rod, the fixing disc and the hand wheel disc. The stop valve does not need to be controlled, the rotating disc is rotated to enable the screw to spirally move downwards, the movable disc is pushed to move downwards, the guide rod, the connecting plate and the limiting rod synchronously move downwards till the limiting rod is inserted into the corresponding limiting holes in the limiting disc, then the hand wheel disc can be limited, and the hand wheel disc and the valve rod cannot rotate; the stop valve body is limited, so that the situation that the stop valve body is automatically opened or closed due to manual accidental touch is prevented, and normal use of the stop valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a stop valve limiting device. Background Art

[0002] As a frequently used valve, the stop valve is widely loved by everyone because of its simple structure and easy use. The stop valve usually achieves the effect of fluid circulation and cutoff by turning the handle to drive the valve stem up and down.

[0003] However, most of the current stop valves do not have a limit device, that is, when not in use, the handle is usually in a static state. If it is subjected to external force or accidentally touched, it is easy for the valve stem to rotate on its own, causing the stop valve to be automatically opened or closed without control, affecting the use of the stop valve. Utility Model Content

[0004] The purpose of the utility model is to solve the problems in the background technology and to propose a stop valve limiting device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The cam is fixedly mounted on the top of the valve stem, and a handwheel disc is fixedly mounted on the outer side of the fixed disc; a limit assembly is used to limit the rotation of the valve stem, the fixed disc and the handwheel disc, the limit assembly includes a screw threadedly connected to the top of the fixed disc, the top of the screw is fixedly mounted with a rotating disc, the bottom of the rotating disc contacts the movable disc, and the movable disc is movably sleeved on the surface of the screw, and two guide rods are symmetrically fixedly mounted on the bottom of the movable disc, and the guide rods movably pass through the top of the fixed disc, a spring is commonly connected between the movable disc and the fixed disc, and the bottoms of the two guide rods are commonly fixedly mounted with a connecting plate, and two limiting rods are symmetrically fixedly mounted on the bottom of the connecting plate, and the limiting disc is fixedly mounted on the top of the shut-off valve body, and a plurality of limiting holes are opened on the top of the limiting disc.

[0007] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: a plurality of protrusions are fixedly mounted on the outer side of the turntable, and the plurality of protrusions are distributed in a circular array.

[0008] In order to better achieve the above purpose, the present invention adopts a further technical solution: the top of the movable disk and the connecting plate are both provided with through holes, and the two through holes are slidingly connected to the screw and the valve stem respectively, and the diameters of the two through holes are both larger than the diameters of the screw and the valve stem.

[0009] In order to better achieve the above-mentioned purpose, the present invention adopts a further technical solution: the plurality of limiting holes are distributed in a circumferential arrangement and are connected to or separated from the limiting rod.

[0010] In order to better achieve the above purpose, the present invention adopts a further technical solution: the spring is movably sleeved on the outer surface of the screw.

[0011] In order to better achieve the above purpose, the present invention adopts a further technical solution: the valve stem is made of stainless steel.

[0012] The advantage of the utility model is that when the stop valve does not need to be controlled, the screw is moved downward by rotating the turntable, pushing the movable plate downward, so that the guide rod and the connecting plate are moved downward synchronously with the limit rod until the limit rod is inserted into the corresponding limit hole on the limit plate, so that the hand wheel plate can be restricted so that the hand wheel plate and the valve stem cannot rotate, thereby limiting the stop valve body, preventing the stop valve body from opening or closing by itself due to accidental human contact, and ensuring the normal use of the stop valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram from a first perspective of a stop valve limit device proposed by the present utility model;

[0014] Figure 2 This is a structural schematic diagram of a limit assembly in a stop valve limit device proposed by the present invention;

[0015] Figure 3 The present invention provides a schematic structural diagram of a connecting plate in a stop valve limiting device.

[0016] In the figure: 1 stop valve body, 2 valve stem, 3 fixed disk, 4 handwheel disk, 5 screw, 6 movable disk, 7 rotating disk, 8 spring, 9 guide rod, 10 connecting plate, 11 limit rod, 12 limit disk, 13 limit hole, 14 protrusion, 15 through hole. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] Reference Figures 1 to 3A stop valve limit device comprises: a stop valve body 1; a valve stem 2, rotatably mounted on the top of the stop valve body 1, the valve stem 2 is made of stainless steel and has good corrosion resistance and good mechanical properties, a fixed disk 3, fixedly mounted on the top of the valve stem 2, and a handwheel disk 4 is fixedly mounted on the outside of the fixed disk 3; a limit assembly for limiting the rotation of the valve stem 2, the fixed disk 3 and the handwheel disk 4, the limit assembly comprises a screw 5 threadedly connected to the top of the fixed disk 3, a turntable 7 is fixedly mounted on the top of the screw 5, a plurality of protrusions 14 are fixedly mounted on the outside of the turntable 7, and the plurality of protrusions 14 are distributed in a circular array, which facilitates the rotation of the turntable 7 by the staff.

[0019] The bottom of the rotating disk 7 contacts with a movable disk 6, and the movable disk 6 is movably sleeved on the surface of the screw 5. Two guide rods 9 are symmetrically fixedly installed on the bottom of the movable disk 6, and the guide rod 9 movably runs through the top of the fixed disk 3. A spring 8 is commonly connected between the movable disk 6 and the fixed disk 3, and the spring 8 is movably sleeved on the outer surface of the screw 5. The bottom of the two guide rods 9 is commonly fixedly installed with a connecting plate 10, and two limit rods 11 are symmetrically fixedly installed on the bottom of the connecting plate 10. A limit disk 12 is fixedly installed on the top of the stop valve body 1. A plurality of limit holes 13 are provided on the top of the limit disk 12. The plurality of limit holes 13 are distributed in a circular array and are plugged into or separated from the limit rod 11. When the hand wheel disk 4 is restricted, the limit rod 11 is inserted into the corresponding limit hole 13 to restrict the hand wheel disk 4, so that the hand wheel disk 4 and the valve stem 2 cannot rotate, thereby realizing the limitation of the stop valve body 1.

[0020] A through hole 15 is provided on the top of the movable disk 6 and the connecting plate 10, and the two through holes 15 are slidingly connected to the screw 5 and the valve stem 2 respectively. The diameters of the two through holes 15 are larger than the diameters of the screw 5 and the valve stem 2, so that the movable disk 6 and the connecting plate 10 will not be affected by the threads on their surfaces when they move on the screw 5 and the valve stem 2 respectively.

[0021] When the hand wheel disc 4 is not needed, the screw 5 is rotated downward, and the movable disc 6 is pushed downward by the turntable 7, and the guide rod 9, the connecting plate 10 and the limiting rod 11 are synchronously moved downward until the limiting rod 11 is inserted into the corresponding limiting hole 13 on the limiting disc 12, thereby limiting the hand wheel disc 4 and making the hand wheel disc 4 and the valve stem 2 unable to rotate.

Claims

1. A stop valve limit device, characterized in that: include: A stop valve body (1); a valve stem (2) rotatably mounted on the top of the stop valve body (1); a fixed disk (3) fixedly mounted on the top of the valve stem (2), and a hand wheel disk (4) fixedly mounted on the outer side of the fixed disk (3); a limit assembly for limiting the rotation of the valve stem (2), the fixed disk (3) and the hand wheel disk (4), the limit assembly comprising a screw (5) threadedly connected to the top of the fixed disk (3), a rotating disk (7) fixedly mounted on the top of the screw (5), a movable disk (6) in contact with the bottom of the rotating disk (7), and a movable sleeve of the movable disk (6) On the surface of the screw (5), two guide rods (9) are symmetrically fixedly installed at the bottom of the movable disk (6), and the guide rods (9) are movable and penetrate the top of the fixed disk (3). A spring (8) is commonly connected between the movable disk (6) and the fixed disk (3). A connecting plate (10) is commonly fixedly installed at the bottom of the two guide rods (9). Two limiting rods (11) are symmetrically fixedly installed at the bottom of the connecting plate (10). A limiting disk (12) is fixedly installed at the top of the stop valve body (1), and a plurality of limiting holes (13) are opened on the top of the limiting disk (12).

2. A stop valve limiting device according to claim 1, characterized in that: A plurality of protrusions (14) are fixedly mounted on the outer side of the turntable (7), and the plurality of protrusions (14) are distributed in a circular array.

3. A stop valve limiting device according to claim 2, characterized in that: The tops of the movable disk (6) and the connecting plate (10) are both provided with through holes (15), and the two through holes (15) are respectively slidably connected to the screw (5) and the valve stem (2), and the diameters of the two through holes (15) are both larger than the diameters of the screw (5) and the valve stem (2).

4. A stop valve limiting device according to claim 3, characterized in that: The plurality of limiting holes (13) are distributed in a circumferential manner and are plugged into or separated from the limiting rod (11).

5. A stop valve limiting device according to claim 4, characterized in that: The spring (8) is movably sleeved on the outer surface of the screw (5).

6. A stop valve limiting device according to claim 1, characterized in that: The valve stem (2) is made of stainless steel.

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