Manual operation structure for rotation locking

Abstract

The utility model relates to a rotary locking manual operation structure which comprises a valve rod and a valve rod nut, a bearing is connected to the outer wall of the bottom end of the valve rod nut in a pressing mode, a gland is arranged on the bearing in a covering mode, the bottom end of the valve rod nut abuts against a valve cover, the valve cover is fixedly connected with the gland through threads, and the valve rod nut is fixedly connected with the valve rod. The top end of the gland is fixedly connected with a lower locking plate, the outer wall of the valve rod nut is connected with an upper locking plate in a pressing mode through a hand wheel, the upper locking plate and the lower locking plate are adjustably locked through a padlock, the top end of the valve rod is fixedly connected with an indicating rod, and the joint of the valve rod and the indicating rod is covered with a dust cover. The manual operation structure for rotation locking has the advantages of being convenient to adjust, improving safety, being convenient to maintain and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of lift rod type valve operation, in particular to a manual operation structure of rotary locking. Background Art

[0002] Currently, lift-stem valves include gate valves, globe valves, and orbital ball valves. Their common feature is that they use a lift-stem to lift the gate or rotate the valve core to open and close the valve. These valves typically require multiple turns, and manual operation typically uses a handwheel or gearbox. This eliminates the need for a padlock when locking the valve during opening and closing, allowing for further manual rotation of the valve, reducing safety.

[0003] For this reason, we have developed a manual operation structure of rotary locking to solve the above problems. Summary of the Invention

[0004] The utility model aims to overcome the deficiencies of the prior art and to provide a manual operation structure for rotary locking, which has the advantages of easy adjustment, improved safety, and easy maintenance.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a manual operation structure of rotary locking, comprising a valve stem and a valve stem nut pressed onto the outer wall of the valve stem, a bearing pressed onto the outer wall of the bottom end of the valve stem nut, a pressure cover is provided on the bearing cover, the bottom end of the valve stem nut abuts against a valve cover, the valve cover and the pressure cover are fixedly connected by threads, the top end of the pressure cover is fixedly connected to a lower locking plate, the outer wall of the valve stem nut is pressed onto an upper locking plate via a handwheel, the upper locking plate and the lower locking plate can be adjusted and locked by a padlock, the top end of the valve stem is fixedly connected to an indicator rod, and a dust cover is provided at the connection between the valve stem and the indicator rod.

[0006] Preferably, a socket is provided at one end of the upper locking plate, and a lock hole is provided at the other end, the socket is plugged into the valve stem nut, and the lock hole is locked with the lower locking plate.

[0007] Preferably, the lower locking plate is provided with first through holes evenly distributed around the circumference, and the first through holes and the locking holes can be adjusted and locked.

[0008] Preferably, the lower locking plate is provided with a plurality of countersunk holes, and the top end of the pressure cover is provided with first screw holes evenly distributed around the circumference, and the countersunk holes are fixedly connected to the first screw holes by screws.

[0009] Preferably, a boss is provided at the bottom of the valve stem nut, and the upper and lower sides of the boss are respectively fixedly connected to a bearing.

[0010] Preferably, an annular cavity is provided on the inner wall of the gland, and the boss and the bearing are arranged in the cavity.

[0011] Preferably, the outer wall of the cavity is provided with a second screw hole, and the second screw hole is sealed and connected to a screw plug.

[0012] Preferably, a third screw hole is provided on the lower side of the second screw hole, and the third screw hole is fixedly connected to the valve cover by a set screw.

[0013] Preferably, a convex ring is provided on the inner wall of the top end of the dust cover, and a washer is pressed between the bottom end and the hand wheel, and the convex ring is pressed with a dust cap.

[0014] Preferably, an indicating surface is provided at the top of the indicating rod, and a screw is provided at the bottom end, and the screw is fixedly connected to the top end of the valve stem.

[0015] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0016] The manual operation structure of the rotary lock described in the utility model is, in actual use, locked by the first through hole and the lock hole at the required flow position, which is convenient for flow adjustment; the valve can be locked by a padlock in the open and closed positions to prevent further operation of the valve, thereby improving safety; a screw plug is provided at the bearing position to facilitate bearing maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the manual operation structure of the rotary lock described in the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 In the figure, a manual operation structure of rotary locking includes a valve stem 11 and a valve stem nut 4 crimped on the outer wall of the valve stem 11, a bearing 9 is crimped on the outer wall of the bottom end of the valve stem nut 4, and a pressure cover 10 is provided on the bearing 9. The bottom end of the valve stem nut 4 abuts against a valve cover 12, and the valve cover 12 and the pressure cover 10 are fixedly connected by threads. The top of the pressure cover 10 is fixedly connected to a lower locking plate 7, and the outer wall of the valve stem nut 4 is crimped with an upper locking plate 6 through a handwheel 5. The upper locking plate 6 and the lower locking plate 7 can be adjusted and locked by a padlock. The top of the valve stem 11 is fixedly connected to an indicator rod 1, and a dust cover 2 is provided at the connection between the valve stem 11 and the indicator rod 1.

[0020] In order to facilitate operation indication, an indicating surface 112 is provided at the top of the indicating rod 1, and a screw 111 is provided at the bottom end, and the screw 111 is fixedly connected to the top end of the valve stem 11. The indicating rod 1 indicates the open and closed state of the valve intuitively.

[0021] In order to improve the dustproof performance, a convex ring 21 is provided on the inner wall of the top of the dust cover 2, and a washer 3 is pressed between the bottom end and the hand wheel 5, and the convex ring 21 is pressed with a dust cap 29. The convex ring 21 facilitates the installation of the dust cap, improves the dustproof effect, and reduces the maintenance time of the valve stem.

[0022] In order to facilitate the rolling operation of the valve stem, a boss 42 is provided at the bottom of the valve stem nut 4, and a bearing 9 is fixedly connected to the upper and lower sides of the boss 42. A shaft shoulder 41 is provided on the middle outer wall of the valve stem nut 4, and a washer 3 is pressed between the handwheel 5 and the shaft shoulder 41.

[0023] In order to facilitate the locking of the upper and lower lock plates, a socket 62 is provided at one end of the upper lock plate 6, and a lock hole 61 is provided at the other end. The socket 62 is plugged into the valve stem nut 4, and the lock hole 61 is locked with the lower lock plate 7. The first through hole 71 is locked with the lock hole 61, while preventing misoperation under human control. The lower lock plate 7 is provided with first through holes 71 evenly distributed around the circumference, and the lower lock plate 7 is provided with multiple countersunk holes 72. The first through holes 71 and the lock hole 61 can be adjusted and locked. The top of the pressure cover 10 is provided with first screw holes 109 evenly distributed around the circumference, and the countersunk holes 72 are fixedly connected to the first screw holes 109 by screws. The lower lock plate 7, the pressure cover 10 and the valve cover 12 are fixedly connected in sequence.

[0024] The inner wall of the gland 10 defines an annular cavity 108, within which the boss 42 and bearing 9 are positioned. A second threaded hole 101 is defined on the outer wall of the cavity 108. A third threaded hole 102 is located beneath the second threaded hole 101. The second threaded hole 101 is sealed with a screw plug 103. The third threaded hole 102 is securely connected to the valve cover 12 via a set screw 105.

[0025] The valve stem nut 4 is installed between the bearings 9 and is fixed to the top of the valve cover 12 by the pressure cover 10. The top transmission thread of the valve stem 11 extends from the valve cover 12 and is driven by the valve stem nut 4. The outer ring of the lower lock plate 7 has a plurality of first through holes 71 evenly distributed in an annular shape and is fixed to the top of the pressure cover 10 by screws 8. The outer ring of the upper lock plate 6 has a lock hole 61. The lock hole 61, the handwheel 5 and the valve stem nut 4 are matched through a flat polygon. When the valve stem nut 4 rotates, the upper lock plate 6 and the handwheel 5 rotate synchronously. The first through hole 71 and the lock hole 61 are on the same center circle. A washer 3 and a dust cover 2 are installed above the handwheel 5. The indicator rod 1 is installed on the top of the valve stem 11 and extends out of the dust cover 2.

[0026] During operation, the valve is closed clockwise and opened counterclockwise by the handwheel 5. After the operation is in place, the lock hole of the upper lock plate 6 is aligned with the first through hole of the lower lock plate 7. When the valve needs to be locked in this position, a padlock can be set in the aligned lock hole and locked.

[0027] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.

Claims

1. A manual operation structure for rotary locking, characterized by: The utility model comprises a valve stem (11) and a valve stem nut (4) pressed onto the outer wall of the valve stem (11), a bearing (9) is pressed onto the outer wall of the bottom end of the valve stem nut (4), a pressure cover (10) is provided on the bearing (9), the bottom end of the valve stem nut (4) abuts against the valve cover (12), the valve cover (12) and the pressure cover (10) are fixedly connected by threads, the top end of the pressure cover (10) is fixedly connected to the lower locking plate (7), the outer wall of the valve stem nut (4) is pressed onto the upper locking plate (6) via a hand wheel (5), the upper locking plate (6) and the lower locking plate (7) are adjustable and locked by a padlock, the top end of the valve stem (11) is fixedly connected to the indicator rod (1), and a dust cover (2) is provided at the connection between the valve stem (11) and the indicator rod (1).

2. The manual operation structure of the rotary lock according to claim 1, characterized in that: One end of the upper locking plate (6) is provided with a socket (62), and the other end is provided with a lock hole (61), the socket (62) is plugged into the valve stem nut (4), and the lock hole (61) is locked with the lower locking plate (7).

3. The manual operation structure of the rotary lock according to claim 2, characterized in that: The lower locking plate (7) is provided with first through holes (71) uniformly distributed around the circumference, and the first through holes (71) and the locking hole (61) can be adjusted and locked.

4. The manual operation structure of the rotary lock according to claim 2, characterized in that: The lower locking plate (7) is provided with a plurality of countersunk holes (72), and the top end of the pressure cover (10) is provided with first screw holes (109) evenly distributed around the circumference, and the countersunk holes (72) and the first screw holes (109) are fixedly connected by screws.

5. The manual operation structure of the rotary lock according to claim 2, characterized in that: A boss (42) is provided at the bottom of the valve stem nut (4), and the upper and lower sides of the boss (42) are respectively fixedly connected to a bearing (9).

6. The manual operation structure of the rotary lock according to claim 5, characterized in that: An annular cavity (108) is provided on the inner wall of the pressure cover (10), and the boss (42) and the bearing (9) are arranged in the cavity (108).

7. The manual operation structure of the rotary lock according to claim 6, characterized in that: A second screw hole (101) is provided on the outer wall of the cavity (108), and the second screw hole (101) is sealed and connected to a screw plug (103).

8. The manual operation structure of the rotary lock according to claim 7, characterized in that: A third screw hole (102) is provided on the lower side of the second screw hole (101), and the third screw hole (102) is fixedly connected to the valve cover (12) via a set screw (105).

9. The manual operation structure of the rotary lock according to claim 1, characterized in that: A convex ring (21) is provided on the inner wall of the top end of the dust cover (2), and a washer (3) is pressed between the bottom end and the hand wheel (5), and the convex ring (21) is pressed with a dust cap (29).

10. The manual operation structure of the rotary lock according to claim 1, characterized in that: The top of the indicating rod (1) is provided with an indicating surface (112), and the bottom end is provided with a screw rod (111), and the screw rod (111) is fixedly connected to the top end of the valve stem (11).

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