Valve position indicating structure for lifting valve rod

Abstract

The utility model relates to the technical field of mechanical valves, in particular to a valve position indicating structure for a lifting valve rod, which comprises a valve rod, a transparent sleeve arranged on the valve rod, a supporting assembly used for stably covering the transparent sleeve above the valve rod, and a driving structure used for driving the valve rod to lift, the transparent sleeve is provided with a plurality of position indicating lines which are convenient for workers to visually observe the position of the valve rod, and the transparent sleeve plays a dustproof role on the valve rod, so that the situation that the valve cannot be normally opened and closed due to the fact that the valve rod is blocked by dust is prevented; meanwhile, by means of the arrangement of the position indicating lines on the transparent sleeve, workers can conveniently and visually observe the position of the valve rod, so that the opening and closing states of the valve are rapidly judged, the problem that in the prior art, the opening and closing positions of the valve are difficult to visually indicate under the dustproof condition is solved, and the accuracy and intuition of valve position indication are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of mechanical valves, in particular to a valve position indicating structure for a lift valve rod. BACKGROUND

[0002] At present, gate valves and stop valves belong to multi-rotation valves, and common driving modes thereof include manual driving, electric driving, pneumatic driving, hydraulic driving and electro-hydraulic driving, wherein manual driving is the most common mode, for a manual gate valve and a manual stop valve, clockwise rotation of a hand wheel can close the valve, and counterclockwise rotation of the hand wheel can open the valve, and the opening and closing state of the valve can be determined by observing the position of a valve rod or an indicating rod.

[0003] When the opening and closing position of the valve needs to be protected from dust, a dust cover is usually arranged on the valve rod, and the length of the indicating rod arranged on the top of the valve rod extending out of the dust cover is used to determine the opening and closing position of the valve core, when the accuracy requirement of the opening and closing position of the valve is high and dust protection is needed, the indicating structure is difficult to meet the requirement of intuitive indication, and there is room for improvement. CONTENT OF THE UTILITY MODEL

[0004] In order to intuitively observe the valve position state of the valve rod, the application provides a valve position indicating structure for a lift valve rod.

[0005] The application provides a valve position indicating structure for a lift valve rod, which adopts the following technical scheme:

[0006] The valve position indicating structure for the lift valve rod comprises a valve rod, a transparent sleeve arranged on the valve rod, a support assembly for stably arranging the transparent sleeve above the valve rod and a driving structure for driving the valve rod to lift and lower, and a plurality of position indicating lines arranged on the transparent sleeve and used for intuitively observing the position of the valve rod by workers.

[0007] By adopting the above technical scheme, the transparent sleeve is arranged to prevent the valve rod from being blocked by dust and unable to normally open and close the valve, and the position indicating lines arranged on the transparent sleeve are used to facilitate workers to intuitively observe the position of the valve rod, so that the opening and closing state of the valve can be quickly determined, the problem that the opening and closing position of the valve cannot be intuitively indicated under the condition of dust protection in the prior art is solved, and the accuracy and intuitiveness of valve position indication are improved.

[0008] Preferably, the support assembly comprises an upper circular ring, a lower circular ring and a screw rod for connecting the upper circular ring and the lower circular ring, the screw rod is arranged through the upper circular ring and is threadedly connected with the lower circular ring, the upper side of the transparent sleeve is connected with the upper circular ring, and the lower side of the transparent sleeve is connected with the lower circular ring.

[0009] By adopting the technical scheme, the upper circular ring, the lower circular ring and the screw rod are arranged to stably cover the transparent sleeve above the valve rod, so that the installation firmness and stability of the transparent sleeve are ensured; and the screw rod is threadedly connected with the upper and lower circular rings, so that the transparent sleeve is convenient to disassemble, assemble or replace in the later period.

[0010] Preferably, the upper circular ring is provided with an upper anti-vibration pad, the lower circular ring is provided with a lower anti-vibration pad, the upper end of the transparent sleeve is clamped with the upper anti-vibration pad, and the lower end of the transparent sleeve is clamped with the lower anti-vibration pad.

[0011] By adopting the technical scheme, the upper anti-vibration pad and the lower anti-vibration pad are arranged to play a role in buffering and shock absorption, and the upper anti-vibration pad and the lower anti-vibration pad can better clamp and tighten the transparent sleeve, so that the stability and sealing performance of the installation of the transparent sleeve are further improved, and dust is prevented from entering the valve rod part through the gap.

[0012] Preferably, the valve rod is threadedly connected with a valve rod nut, the driving structure is a hand wheel, the hand wheel is fixedly connected to the valve rod nut, and the lower circular ring is threadedly connected to the valve rod nut.

[0013] By adopting the technical scheme, the valve rod is threadedly connected with a valve rod nut, the lower circular ring is threadedly connected to the valve rod nut, and the driving structure is a hand wheel, the hand wheel is fixedly connected to the valve rod nut.

[0014] Preferably, the driving structure is two bevel gears meshing with each other, and one of the bevel gears is coaxially fixed with the valve rod.

[0015] By adopting the technical scheme, the bevel gear is used as the driving structure to realize the transmission of power and the change of direction, and the rotation of the bevel gear is effectively transmitted to the valve rod by coaxially fixing one of the bevel gears with the valve rod, so that the lifting of the valve rod is realized, and the opening and closing of the valve are controlled.

[0016] Preferably, four position indication lines are arranged, the positions corresponding to the position indication lines on the transparent sleeve are provided with scale marks of 0%, 25%, 50% and 100%, and any of the scale marks is located below the corresponding position indication line.

[0017] By adopting the technical scheme, the four position indication lines and the corresponding scale marks are arranged to more accurately indicate the opening and closing state of the valve, the opening degree of the valve can be accurately judged by the worker according to the relative position between the top of the valve rod and the position indication line, the accuracy and precision of the valve position indication are improved, and the scale marks of 0%, 25%, 50% and 100% are arranged to improve the accuracy and facilitate the understanding and operation of the worker.

[0018] Preferably, the top of the valve rod is provided with a yellow fluorescent mark, the transparent sleeve is provided with a red fluorescent mark and a green fluorescent mark, the red fluorescent mark is coated on the scale character showing 0% and the corresponding position indicating line, and the green fluorescent mark is coated on the scale character showing 100% and the corresponding position indicating line.

[0019] By adopting the technical scheme, the top of the valve rod is coated with a yellow fluorescent mark, the scale character showing 0% on the transparent sleeve is coated with a yellow fluorescent mark, and the scale character showing 100% is coated with a green fluorescent mark, so that the workers can quickly and accurately judge the opening and closing state of the valve by observing the positional relationship of the fluorescent marks of different colors in the dark or dim environment.

[0020] Preferably, the material of the transparent sleeve is glass.

[0021] By adopting the technical scheme, the transparent sleeve made of glass has good transparency, so that the workers can clearly observe the position of the valve rod, and the accuracy of the valve position indication is ensured.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. By arranging the transparent sleeve, the transparent sleeve plays a dustproof role on the valve rod, preventing the valve rod from being blocked by dust and unable to normally open and close the valve; meanwhile, by arranging the position indicating lines on the transparent sleeve, the workers can intuitively observe the position of the valve rod, so as to quickly judge the opening and closing state of the valve, thereby solving the problem that it is difficult to intuitively indicate the opening and closing position of the valve in the dustproof case in the prior art, and improving the accuracy and intuitiveness of the valve position indication;

[0024] 2. By arranging the upper ring, the lower ring and the screw rod, the transparent sleeve is stably covered above the valve rod, so as to ensure the installation firmness and stability of the transparent sleeve; and by the threaded connection of the screw rod with the upper and lower rings, the transparent sleeve can be easily disassembled, replaced or assembled later;

[0025] 3. By arranging the four position indicating lines and the corresponding scale characters, the opening and closing state of the valve can be more accurately indicated, the workers can accurately judge the opening degree of the valve according to the relative position of the top of the valve rod and the position indicating lines, and the accuracy and precision of the valve position indication are improved. Meanwhile, by arranging the scale characters of 0%, 25%, 50% and 100%, the accuracy is improved, and the workers can also understand and operate conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the isometric view mainly embodying the overall structure in the first embodiment of the present application;

[0027] Figure 2 is Figure 1 is a partial enlarged view mainly embodying the cooperation relationship between the upper circular ring and the upper vibration-proof pad in the

[0028] Figure 3 is Figure 1 is a partial enlarged view mainly embodying the cooperation relationship between the lower circular ring and the lower vibration-proof pad in the

[0029] Figure 4 is an axonometric schematic view mainly embodying the overall structure in the embodiment one of the present application;

[0030] Reference signs: 1, valve stem; 11, valve stem nut; 2, transparent sleeve; 21, position indicating line; 22, scale character; 3, support assembly; 31, upper circular ring; 311, first mounting groove; 312, upper vibration-proof pad; 3121, first clamping groove; 313, adaptive hole; 32, lower circular ring; 321, second mounting groove; 322, lower vibration-proof pad; 3221, second clamping groove; 323, lower threaded hole; 33, screw rod; 4, driving structure; 41, hand wheel; 42, bevel gear. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying Figure 1 - the accompanying Figure 4 The present application will be further described in detail.

[0032] The embodiment of the present application discloses a valve position indicating structure for a lift valve stem.

[0033] Embodiment one:

[0034] Referring to Figure 1 A valve position indicating structure for a lift valve stem, comprising a valve stem 1, the valve stem 1 is provided with a transparent sleeve 2, a support assembly 3 and a driving structure 4, the support assembly 3 is used for stably arranging the transparent sleeve 2 on the valve stem 1, and the driving mechanism is used for driving the valve stem 1 to lift.

[0035] Referring to Figure 1 The transparent sleeve 2 is in a hollow cylindrical shape, and the transparent sleeve 2 is made of a transparent material, preferably glass in the embodiment, the transparent sleeve 2 plays a dustproof role on the valve stem 1, avoids dust in the air from entering the valve stem 1 part, and prevents the valve stem 1 from being blocked due to dust and unable to normally open and close the valve.

[0036] Referring to Figure 1The outer wall of the transparent sleeve 2 is provided with a position indicating line 21, the position indicating line 21 is provided with a plurality of lines, in the embodiment, the position indicating line 21 is provided with four equidistant lines, and the outer wall of the transparent sleeve 2 is provided with scale marks 22 of 0%, 25%, 50% and 100% at positions corresponding to the position indicating line 21, the scale mark 22 of 0% indicates that the valve position is in a fully closed state, the scale mark 22 of 100% indicates that the valve position is in a fully open state, and any scale mark 22 is formed below the corresponding position indicating line 21 by a laser etching process, so that the staff can intuitively observe the position of the valve rod 1, thereby quickly judging the opening and closing state of the valve.

[0037] With reference to Figure 1 The valve rod 1 is threadedly connected with a valve rod nut 11, the supporting assembly 3 comprises an upper ring 31, a lower ring 32 and a screw rod 33, the transparent sleeve 2 is arranged between the upper ring 31 and the lower ring 32, and the lower ring 32 is threadedly connected with the outer wall of the valve rod nut 11 through an internal thread.

[0038] With reference to Figure 2 and Figure 3 The upper ring 31 is provided with a first installation slot 311 with a downward opening, the lower ring 32 is provided with a second installation slot 321 with an upward opening, the first installation slot 311 of the upper ring 31 is clamped with an upper anti-vibration pad 312, the upper anti-vibration pad 312 is provided with a first clamping slot 3121 with a downward opening, the second installation slot 321 of the lower ring 32 is clamped with a lower anti-vibration pad 322, the lower anti-vibration pad 322 is provided with a second clamping slot 3221 with an upward opening, the upper end of the transparent sleeve 2 is clamped with the first clamping slot 3121 of the upper anti-vibration pad 312, and the lower end of the transparent sleeve 2 is clamped with the second clamping slot 3221 of the lower anti-vibration pad 322, and the upper anti-vibration pad 312 and the lower anti-vibration pad 322 are made of a soft material, which is preferably a silica gel material in the embodiment.

[0039] With reference to Figure 2 and Figure 3 The screw rod 33 is provided with a plurality of screw rods, which are three in the embodiment, the upper ring 31 is provided with adaptive holes 313 arranged in a circumferential array corresponding to the number of the screw rods 33, the lower ring 32 is provided with lower threaded holes 323 arranged in a circumferential array corresponding to the number of the screw rods 33, and any screw rod 33 is threadedly connected with the lower ring 32 from top to bottom through the upper ring 31, so that the upper ring 31 and the lower ring 32 are both threadedly connected with the screw rod 33, and any screw rod 33 is prevented from loosening through a nut and a gasket, which not only ensures the stability of the installation of the transparent sleeve 2, but also facilitates the staff to disassemble the transparent sleeve 2 in the later period, that is, the transparent sleeve 2 can be disassembled only by loosening the nut and the gasket on the screw rod 33, thereby facilitating maintenance and repair.

[0040] With reference to Figure 1, the upper anti-vibration pad 312 and the lower anti-vibration pad 322 are arranged to provide buffering and damping effects for the transparent sleeve 2, reduce the influence of vibration on the transparent sleeve 2 during operation of the valve, prolong the service life of the transparent sleeve 2, and the upper anti-vibration pad 312 and the lower anti-vibration pad 322 jointly realize axial clamping and fixing of the transparent sleeve 2, further improve the stability and sealing performance of the installation of the transparent sleeve 2, and prevent dust from entering the valve stem 1 part through the gap.

[0041] With reference to Figure 1 The design of the support structure can adapt to different driving structures 4. In the present embodiment, the driving structure 4 is provided as a hand wheel 41, which is arranged below the lower circular ring 32 and is fixed on the outer wall of the valve stem nut 11 through a regular hexagonal connection, so that the valve stem nut 11 is driven to rotate by rotating the hand wheel 41, thereby driving the valve stem 1 to ascend and descend.

[0042] With reference to Figure 1 The top of the valve stem 1 is coated with a yellow fluorescent mark, and the transparent sleeve 2 is provided with a red fluorescent mark and a green fluorescent mark. The red fluorescent mark is coated on the scale character 22 indicating 0% and the corresponding position indicating line 21, and the green fluorescent mark is coated on the scale character 22 indicating 100% and the corresponding position indicating line 21. In the night or in a relatively dark environment, the worker can quickly and accurately judge the opening and closing state of the valve by observing the positional relationship of the fluorescent marks of different colors, thereby improving the visibility and practicability of the valve position indication in special environments and ensuring the safety and reliability of the valve operation.

[0043] With reference to Figure 1 When the worker rotates the hand wheel 41 clockwise at night, the hand wheel 41 drives the valve stem nut 11 to drive the valve stem 1 to descend, and the yellow fluorescent mark at the top of the valve stem 1 gradually aligns with the position indicating lines 21. When the yellow fluorescent mark of the valve stem 1 is aligned with the red fluorescent mark of the position indicating line 21, the valve is in a fully closed state. When the worker rotates the hand wheel 41 counterclockwise, the hand wheel 41 drives the valve stem nut 11 to drive the valve stem 1 to ascend, and when the yellow fluorescent mark of the valve stem 1 is aligned with the green fluorescent mark of the position indicating line 21, the valve is in a fully open state.

[0044] The implementation principle of the embodiment of the application is that the worker rotates the hand wheel 41 clockwise to drive the valve rod nut 11 to rotate, thereby driving the valve rod 1 to descend, when the position indicating line 21 corresponding to the 0% scale character 22 on the top of the valve rod 1 is flush, the valve is in a fully closed state; the worker rotates the hand wheel 41 counterclockwise to drive the valve rod nut 11 to rotate, thereby driving the valve rod 1 to ascend, when the position indicating line 21 corresponding to the 100% scale character 22 on the top of the valve rod 1 is flush, the valve is in a fully open state, thereby the worker can directly observe the position of the valve rod 1, and quickly judge the opening and closing state of the valve.

[0045] Embodiment two:

[0046] The difference between embodiment two and embodiment one is that:

[0047] With reference to Figure 4 , the driving structure 4 adopts two mutually matched bevel gears 42, one of which is connected to the input shaft through a flat key, and the other is coaxially fixed with the valve rod 1, the lower ring 32 is threadedly connected to the outer wall of the valve rod 1 through internal threads, and the two bevel gears 42 are arranged below the lower ring 32.

[0048] With reference to Figure 4 , in actual operation, the worker drives the bevel gear 42 connected to the input shaft to rotate, thereby driving the other bevel gear 42 and the valve rod 1 to move up and down.

[0049] The above are all preferred embodiments of the application, and do not limit the protection scope of the application, so: all equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A valve position indicating structure for a lift valve stem, characterized by: The valve rod (1) is provided with a transparent sleeve (2), a support assembly (3) for stably covering the transparent sleeve (2) above the valve rod (1), and a driving structure (4) for driving the valve rod (1) to lift.

2. A valve position indicator structure for a lift valve stem (1) according to claim 1, characterized in that: The support assembly (3) comprises an upper circular ring (31), a lower circular ring (32), and a screw rod (33) for connecting the upper circular ring (31) and the lower circular ring (32), the screw rod (33) penetrates the upper circular ring (31) and is threadedly connected with the lower circular ring (32), the upper end of the transparent sleeve (2) is connected with the upper circular ring (31), and the lower end of the transparent sleeve (2) is connected with the lower circular ring (32).

3. A valve position indicator structure for a lift valve stem (1) according to claim 2, characterized in that: The upper circular ring (31) is provided with an upper anti-vibration pad (312), the lower circular ring (32) is provided with a lower anti-vibration pad (322), the upper end of the transparent sleeve (2) is clamped with the upper anti-vibration pad (312), and the lower end of the transparent sleeve (2) is clamped with the lower anti-vibration pad (322).

4. A valve position indicator structure for a lift valve stem (1) according to claim 2, characterized in that: The valve rod (1) is threadedly connected with a valve rod nut (11), the lower circular ring (32) is threadedly connected with the valve rod nut (11), and the driving structure (4) is a hand wheel (41) fixedly connected with the valve rod nut (11).

5. A valve position indicator structure for a lift valve stem (1) according to claim 1, characterized in that: The driving structure (4) comprises two intermeshing bevel gears (42), and one of the bevel gears (42) is coaxially fixed with the valve rod (1).

6. A valve position indicator structure for a lift valve stem (1) according to claim 1, characterized in that: The position indicating lines (21) are provided with four position indicating lines (21), the transparent sleeve (2) is provided with 0%, 25%, 50%, and 100% scale marks (22) corresponding to the position indicating lines (21), and any scale mark (22) is located below the corresponding position indicating line (21).

7. A valve position indicator structure for a lift valve stem (1) according to claim 6, characterized in that: The top of the valve rod (1) is provided with a yellow fluorescent mark, the transparent sleeve (2) is provided with a red fluorescent mark and a green fluorescent mark, the red fluorescent mark is coated on the scale mark (22) showing 0% and the corresponding position indicating line (21), and the green fluorescent mark is coated on the scale mark (22) showing 100% and the corresponding position indicating line (21).

8. A valve position indicator structure for a lift valve stem (1) according to claim 1, characterized in that: The material of the transparent sleeve (2) is glass.

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