Multi-rotation valve hand wheel belt lock structure

Abstract

The utility model relates to the technical field of valves, in particular to a multi-rotation valve hand wheel belt lock structure which comprises a support, a valve rod and a valve rod nut arranged on the valve rod, the valve rod and the valve rod nut are both rotationally arranged in the support, a lower locking wafer is clamped to the support, an upper locking wafer is clamped to the valve rod nut, and the valve rod nut is connected with the lower locking wafer. Round holes are formed in the upper locking wafer in a circumferential array mode, kidney-shaped holes are symmetrically formed in the lower locking wafer, T-shaped pin shafts and fixing locks are arranged on the lower locking wafer, the T-shaped pin shafts penetrate through the round holes and the kidney-shaped holes from top to bottom, and first fixing holes facilitating locking of the fixing locks are formed in the T-shaped pin shafts. The upper locking wafer and the lower locking wafer are provided with the kidney-shaped holes, so that at least one circular hole in the upper locking wafer can be aligned with the kidney-shaped holes in the lower locking wafer, the T-shaped pin shaft can penetrate through the circular holes and the kidney-shaped holes, then a fixing lock penetrates through the first fixing holes of the T-shaped pin shaft for locking, and locking between the upper locking wafer and the lower locking wafer is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of valves, in particular to a multi-rotation valve hand wheel with a locking structure. BACKGROUND

[0002] The multi-rotation valve mainly comprises a hand-operated gate valve and a stop valve, and is widely applied to cutting off medium on a pipeline. The existing hand-operated gate valve and stop valve usually realize opening or closing of the valve by rotating a hand wheel. For some important working occasions, the valve opening and closing position usually needs to be locked to prevent economic loss or safety accidents caused by misoperation.

[0003] The locking method of the hand wheel of the existing hand-operated gate valve and stop valve is that a steel plate with holes is welded on the top of a support, and a steel wire is used to lock the steel plate with holes and the hand wheel. However, this locking method needs special design of the valve. When the diameter of the hand wheel is small, the staff is easy to touch the steel plate with holes and be hurt, and there is room for improvement. CONTENT OF THE UTILITY MODEL

[0004] In order to avoid deformation of the support caused by welding of the locking device, the application provides a multi-rotation valve hand wheel with a locking structure.

[0005] The application provides a multi-rotation valve hand wheel with a locking structure, which adopts the following technical scheme:

[0006] The multi-rotation valve hand wheel with a locking structure comprises a support, a valve rod and a valve rod nut arranged on the valve rod. The valve rod and the valve rod nut are both rotationally arranged in the support. A lower locking disc is clamped on the support. An upper locking disc is clamped on the valve rod nut. Circular holes are arranged in the circumferential direction on the upper locking disc. Waist-shaped holes are symmetrically arranged on the lower locking disc. A T-shaped pin shaft and a fixed lock for fixing the upper locking disc and the lower locking disc are arranged on the lower locking disc. The T-shaped pin shaft penetrates the circular holes and the waist-shaped holes from top to bottom. A first fixing hole for locking the fixed lock is arranged on the T-shaped pin shaft.

[0007] By adopting the above technical scheme, the upper locking disc and the lower locking disc are both circular, so that the possibility of injury of the staff during operation of the upper locking disc and the lower locking disc is effectively avoided. The circular holes are arranged in an array, and the waist-shaped holes are symmetrically arranged, so that at least one circular hole on the upper locking disc can be aligned with the waist-shaped hole on the lower locking disc, so that the T-shaped pin shaft can penetrate the circular hole and the waist-shaped hole to preliminarily lock the upper locking disc and the lower locking disc. Then, the fixed lock penetrates the first fixing hole of the T-shaped pin shaft to be locked, so that the valve rod nut is locked, that is, the valve opening and closing position can be locked without welding of another locking device.

[0008] Preferably, the upper locking disc is provided with a first limiting hole in the shape of a regular hexagon, and the valve rod nut is in clamping connection with the first limiting hole of the upper locking disc.

[0009] By adopting the above technical scheme, the first limiting hole is in the shape of a regular hexagon, which effectively prevents relative rotation between the upper locking disc and the valve rod nut, thereby ensuring stability and reliability of the upper locking disc during locking.

[0010] Preferably, the lower locking disc is provided with a second limiting hole in the shape of a waist, and the bracket is in clamping connection with the second limiting hole of the upper locking disc.

[0011] By adopting the above technical scheme, the second limiting hole is in the shape of a waist, which effectively prevents relative rotation between the lower locking disc and the bracket, thereby ensuring stability and reliability of the lower locking disc during locking.

[0012] Preferably, a first bearing is sleeved on the valve rod, the first bearing is in abutting connection with the inner wall of the bracket, and the upper surface of the first bearing is in abutting connection with the lower surface of the valve rod nut.

[0013] By adopting the above technical scheme, the first bearing is provided, which effectively reduces friction between the valve rod nut and the bracket during rotation, thereby improving durability of the valve rod nut and the bracket.

[0014] Preferably, the valve rod nut comprises a connecting portion and a supporting portion, the connecting portion and the supporting portion are connected, a second bearing is sleeved on the connecting portion, the outer ring of the second bearing is in abutting connection with the inner wall of the bracket, and the lower surface of the second bearing is in abutting connection with the upper surface of the supporting portion.

[0015] By adopting the above technical scheme, the second bearing is provided, which effectively reduces friction between the valve rod nut and the bracket during rotation, thereby improving smoothness of the valve rod nut during rotation, and improving durability of the valve rod nut and the bracket.

[0016] Preferably, a gland for pressing the second bearing and the supporting portion is sleeved on the connecting portion of the valve rod nut, the gland is in threaded connection with the lower locking disc by means of a bolt, and the lower surface of the gland is in abutting connection with the second bearing.

[0017] By adopting the above technical scheme, the gland is provided, which can press the second bearing and the supporting portion, thereby improving compactness and stability of the overall structure.

[0018] Preferably, the lower locking disc is symmetrically provided with a fixing wire for connecting a T-shaped pin shaft, and the T-shaped pin shaft is provided with a second fixing hole for connecting the fixing wire.

[0019] By adopting the technical scheme, the fixed wire enables the T-shaped pin shaft to be firmly fixed on the lower locking disc, avoiding the situation that the T-shaped pin shaft is lost after being removed by the staff.

[0020] Preferably, a hand wheel is rotationally connected to the valve rod nut, and the lower surface of the hand wheel is in abutting cooperation with the upper locking disc.

[0021] By adopting the technical scheme, the hand wheel is arranged to facilitate the staff to rotate the valve rod nut and the valve rod.

[0022] To sum up, the present application has at least one of the following beneficial technical effects:

[0023] 1. The upper locking disc and the lower locking disc are circular, which effectively avoids the possibility of injury of the staff during the operation of the upper locking disc and the lower locking disc; the array of circular holes and the symmetrical arrangement of the waist-shaped holes ensure that at least one circular hole on the upper locking disc can be aligned with the waist-shaped hole on the lower locking disc, so that the T-shaped pin shaft can pass through the circular hole and the waist-shaped hole to preliminarily lock the upper locking disc and the lower locking disc, and then the fixed lock passes through the first fixed hole of the T-shaped pin shaft to be locked, thereby realizing the locking of the valve rod nut, i.e. without welding additional locking devices, the opening and closing positions of the valve can be locked;

[0024] 2. The first limiting hole is hexagonal, which effectively prevents the relative rotation between the upper locking disc and the valve rod nut, thereby ensuring the stability and reliability of the upper locking disc during locking; the second limiting hole is waist-shaped, which effectively prevents the relative rotation between the lower locking disc and the bracket, thereby ensuring the stability and reliability of the lower locking disc during locking;

[0025] 3. The first bearing and the second bearing are arranged to effectively reduce the friction between the valve rod nut and the bracket during rotation, improve the smoothness of the valve rod nut during rotation, and improve the durability of the valve rod nut and the bracket. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a half-sectional view of the valve hand wheel with a lock structure in the embodiment of the present application;

[0027] Figure 2 is a top view of the upper locking disc structure in the embodiment of the present application;

[0028] Figure 3 is a top view of the lower locking disc structure in the embodiment of the present application;

[0029] Figure 4 is Figure 1The figure mainly shows the partial enlarged view of the matching relationship between the T-pin shaft and the upper locking disc and the lower locking disc;

[0030] Figure 5 This is a half-section view of the embodiment of the present application, which mainly reflects the cooperation relationship between the fixed lock, the upper locking disc, and the lower locking disc;

[0031] Figure 6 yes Figure 1 The figure mainly shows a partial enlarged view of the matching relationship between the bracket and the first bearing.

[0032] Figure markings: 1. bracket; 11. lower locking disc; 111. second limiting hole; 112. waist-shaped hole; 113. T-shaped pin; 1131. upper part; 11311. second fixing hole; 1132. lower part; 11321. first fixing hole; 114. fixing lock; 115. connecting hole; 1151. fixing wire; 12. stepped surface; 2. valve stem; 21. first bearing; 22. second bearing; 3. valve stem nut; 31. upper locking disc; 311. first limiting hole; 312. circular hole; 32. connecting part; 321. pressure cover; 3211. abutting part; 3212. holding part; 322. handwheel; 323. locking nut; 3231. adapter hole; 324. anti-rotation pin; 33. supporting part. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1 -Attached Figure 6 This application is described in further detail.

[0034] The embodiment of the present application discloses a multi-rotation valve handwheel with a locking structure.

[0035] Reference Figure 1 A multi-turn valve handwheel with a lock structure includes a bracket 1, a valve stem 2 and a valve stem nut 3 threadedly connected to the valve stem 2. The valve stem 2 and the valve stem nut 3 are both rotatably arranged inside the bracket 1.

[0036] Reference Figure 1 and Figure 2 A locking disc 31 is provided on the valve stem nut 3, and a first limiting hole 311 in the shape of a regular hexagon is opened on the locking disc 31 along its thickness direction. The valve stem nut 3 and the first limiting hole 311 of the locking disc 31 form a snap fit, thereby effectively preventing relative rotation between the locking disc 31 and the valve stem nut 3, thereby ensuring the stability and reliability of the locking disc 31 when locked, and then when the valve stem nut 3 rotates, it will drive the locking disc 31 to rotate.

[0037] Reference Figure 1 and Figure 3The lower locking disc 11 is provided on the bracket 1, and a second limiting hole 111 in the shape of a waist is formed in the thickness direction of the lower locking disc 11. The bracket 1 and the second limiting hole 111 of the upper locking disc 31 form a clamping fit, thereby effectively preventing relative rotation between the lower locking disc 11 and the bracket 1, thereby ensuring the stability and reliability of the lower locking disc 11 during locking. Since the bracket 1 is fixed, the lower locking disc 11 is fixed on the bracket 1 and does not rotate.

[0038] With reference to Figure 2 and Figure 3 The upper locking disc 31 and the lower locking disc 11 are both circular, which effectively avoids the possibility of injury to the staff during operation of the upper locking disc 31 and the lower locking disc 11.

[0039] With reference to Figure 2 and Figure 3 The upper locking disc 31 is circumferentially arranged with a plurality of circular holes 312, and the lower locking disc 11 is symmetrically arranged with a plurality of waist-shaped holes 112. In this embodiment, the circular holes 312 are twenty-four in number, and the waist-shaped holes 112 are two in number. There are always two circular holes 312 on the upper locking disc 31 that are aligned with the waist-shaped holes 112.

[0040] With reference to Figure 1 and Figure 4 The lower locking disc 11 is provided with a T-shaped pin shaft 113 and a fixed lock 114 for fixing the upper locking disc 31 and the lower locking disc 11. The T-shaped pin shaft 113 and the fixed lock 114 are both provided with two corresponding to the number and position of the circular holes 312. Since the structure and connection mode of the two T-shaped pin shafts 113 are the same, one of the T-shaped pin shafts 113 will be described as an example.

[0041] With reference to Figure 4 and Figure 5 The T-shaped pin shaft 113 includes an upper portion 1131 and a lower portion 1132, which are integrally formed. The lower portion 1132 of the T-shaped pin shaft 113 is arranged from top to bottom through the circular hole 312 and the waist-shaped hole 112, and the upper surface of the upper portion 1131 of the T-shaped pin shaft 113 abuts against the upper surface of the upper locking disc 31. The lower portion 1132 of the T-shaped pin shaft 113 is provided with a first fixing hole 11321 through which the fixed lock 114 passes. The fixed lock 114 is locked when in use, and the fixed lock 114 can also directly pass through the circular hole 312 and the waist-shaped hole 112 to lock the upper locking disc 31 and the lower locking disc 11.

[0042] With reference to Figure 3 and Figure 4The lower locking disc 11 is symmetrically provided with a connecting hole 115, and a fixing wire 1151 for connecting the T-shaped pin shaft 113 is connected in any connecting hole 115 of the lower locking disc 11. The upper portion 1131 of the T-shaped pin shaft 113 is provided with a second fixing hole 11311 for connecting the fixing wire 1151, so that the fixing wire 1151 can firmly fix the T-shaped pin shaft 113 on the lower locking disc 11, avoiding the loss of the T-shaped pin shaft 113 after the staff removes the T-shaped pin shaft 113.

[0043] With reference to Figure 1 and Figure 6 , the valve stem nut 3 comprises a connecting portion 32 and a supporting portion 33, which are integrally formed. The first bearing 21 is sleeved on the valve stem 2, the stepped surface 12 is arranged on the inner wall of the bracket 1, the first bearing 21 is in abutting cooperation with the stepped surface 12 of the bracket 1, the first bearing 21 is arranged below the valve stem nut 3, and the upper surface of the first bearing 21 is in abutting cooperation with the lower surface of the supporting portion 33 of the valve stem nut 3. By arranging the first bearing 21, the friction between the valve stem nut 3 and the bracket 1 during rotation is effectively reduced, and the durability of the valve stem nut 3 and the bracket 1 is improved.

[0044] With reference to Figure 1 , the second bearing 22 is sleeved on the connecting portion 32 of the valve stem nut 3, the outer ring of the second bearing 22 is in abutting cooperation with the inner wall of the bracket 1, and the lower surface of the second bearing 22 is in abutting cooperation with the upper surface of the supporting portion 33. By arranging the second bearing 22, the friction between the valve stem nut 3 and the bracket 1 during rotation is effectively reduced, the smoothness of the valve stem nut 3 during rotation is improved, and the durability of the valve stem nut 3 and the bracket 1 is improved.

[0045] With reference to Figure 1 , the gland 321 with a T-shaped cross section is sleeved on the connecting portion 32 of the valve stem nut 3, the gland 321 is threadedly connected with the lower locking disc 11 through bolts, the gland 321 comprises an abutting portion 3211 and a pressing portion 3212, which are integrally formed, the lower surface of the abutting portion 3211 is in abutting cooperation with the upper surface of the lower locking disc 11, and the lower surface of the pressing portion 3212 of the gland 321 is in abutting cooperation with the upper surface of the second bearing 22.

[0046] With reference to Figure 1 , by arranging the gland 321, the first bearing 21, the second bearing 22, the supporting portion 33 of the valve stem nut 3 and the lower locking disc 11 can be pressed tightly, and the compactness and stability of the overall structure are improved.

[0047] With reference to Figure 1The connecting portion 32 of the valve stem nut 3 is rotationally connected with a hand wheel 322, the lower surface of the hand wheel 322 is in abutting cooperation with the upper surface of the upper locking disc 31, the hand wheel 322 is convenient for an operator to operate to drive the valve stem nut 3 and the valve stem 2 to rotate, so that the valve stem nut 3 drives the upper locking disc 31 to rotate.

[0048] With reference to Figure 1 The connecting portion 32 of the valve stem nut 3 is threadedly connected with a locking nut 323, the locking nut 323 is arranged above the hand wheel 322, the lower surface of the locking nut 323 is in abutting cooperation with the upper surface of the hand wheel 322, the locking nut 323 is radially provided with an adapting hole 3231 and an anti-rotation pin 324 for preventing the locking nut 323 from rotating, the anti-rotation pin 324 is in plug-in cooperation with the adapting hole 3231.

[0049] With reference to Figure 1 By arranging the locking nut 323 and the anti-rotation pin 324, the possibility of the hand wheel 322 loosening and falling during rotation is reduced, so that the stability and reliability of the hand wheel 322 during rotation are improved.

[0050] The implementation principle of the embodiment is that: when locking the valve, for a large-diameter valve, an operator can first adopt the T-shaped pin shaft 113 to pass through the circular hole 312 and the waist-shaped hole 112 to lock the position, and then use the fixing lock 114 to pass through the first fixing hole 11321 on the T-shaped pin shaft 113 to lock; for a small-diameter valve, the operator can also not adopt the T-shaped pin shaft 113, but directly adopt the fixing lock 114 to pass through the circular hole 312 and the waist-shaped hole 112 to lock the position.

[0051] When starting or closing the valve, the fixing lock 114 and the T-shaped pin shaft 113 are first removed, and then the hand wheel 322 is rotated to open or close the valve.

[0052] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any 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 multi-turn valve handwheel with a locking structure, characterized by: The invention comprises a bracket (1), a valve stem (2) and a valve stem nut (3) arranged on the valve stem (2); the valve stem (2) and the valve stem nut (3) are both rotatably arranged inside the bracket (1); a lower locking disc (11) is clamped on the bracket (1); an upper locking disc (31) is clamped on the valve stem nut (3); circular holes (312) are arranged in a circumferential array on the upper locking disc (31); waist-shaped holes (112) are symmetrically arranged on the lower locking disc (11); a T-shaped pin shaft (113) and a fixing lock (114) for fixing the upper locking disc (31) and the lower locking disc (11) are arranged on the lower locking disc (11); the circular hole (312) and the waist-shaped hole (112) are penetrated from top to bottom by the T-shaped pin shaft (113); and a first fixing hole (11321) is provided on the T-shaped pin shaft (113) for facilitating the locking of the fixing lock (114).

2. The multi-turn valve handwheel lock structure according to claim 1, characterized in that: The locking disc (31) is provided with a first limiting hole (311) in the form of a regular hexagon, and the valve stem nut (3) forms a snap fit with the first limiting hole (311) of the locking disc (31).

3. The multi-turn valve handwheel lock structure according to claim 1, characterized in that: A waist-shaped second limiting hole (111) is provided on the lower locking disc (11), and the bracket (1) and the second limiting hole (111) of the upper locking disc (31) form a snap fit.

4. The multi-turn valve handwheel lock structure according to claim 1, characterized in that: The valve stem (2) is sleeved with a first bearing (21), the first bearing (21) forms an abutment fit with the inner wall of the bracket (1), and the upper surface of the first bearing (21) forms an abutment fit with the lower surface of the valve stem nut (3).

5. The multi-turn valve handwheel lock structure according to claim 1, characterized in that: The valve stem nut (3) includes a connecting portion (32) and a supporting portion (33), wherein the connecting portion (32) and the supporting portion (33) are connected to each other, and a second bearing (22) is sleeved on the connecting portion (32), wherein the outer ring of the second bearing (22) forms an abutment fit with the inner wall of the bracket (1), and the lower surface of the second bearing (22) forms an abutment fit with the upper surface of the supporting portion (33).

6. The multi-turn valve hand wheel lock structure according to claim 5, characterized in that: A pressure cover (321) for pressing the second bearing (22) and the support portion (33) is sleeved on the connecting portion (32) of the valve stem nut (3); the pressure cover (321) is threadedly connected to the lower locking disc (11) via bolts; and the lower surface of the pressure cover (321) forms an abutment fit with the second bearing (22).

7. The multi-turn valve handwheel lock structure according to claim 1, characterized in that: A fixing wire (1151) for connecting to a T-shaped pin shaft (113) is symmetrically provided on the lower locking disc (11), and a second fixing hole (11311) for connecting to the fixing wire (1151) is provided on the T-shaped pin shaft (113).

8. The multi-turn valve handwheel lock structure according to claim 1, characterized in that: The valve stem nut (3) is rotatably connected to a hand wheel (322), and the lower surface of the hand wheel (322) is in abutment with the locking disc (31).

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