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CN-115992906-B - Torque limiting self-locking operation device

CN115992906BCN 115992906 BCN115992906 BCN 115992906BCN-115992906-B

Abstract

The invention relates to a torque-limiting self-locking operation device, which comprises a handle frame (100), an operation handle (200), a locking disc (300) and a locking piece (400), wherein the locking disc (300) is fixed on a rotary operation mechanism, the handle frame is provided with an operation shaft sleeve (110), the operation shaft sleeve (110) is sleeved on an operation shaft (20) and drives the operation shaft to rotate, the operation handle (200) is provided with a driving head (210), the driving head (210) drives the locking piece (400) to press the locking disc (300), the handle frame is provided with a jacking spring (130), the driving head is provided with a driving ball socket (211), and the jacking spring (130) jacks the driving ball socket (211) through a jacking ball (230). The invention adopts the jacking spring to jacking and drive the ball socket through the jacking ball, and adjusts the output torque of the operation shaft sleeve steplessly, and adopts the locking disc to lock the valve rod at the closing position of the valve, so that the valve can be reliably kept in the closing state, the operation handle rotates relative to the handle frame in the operation of driving the self-locking clamping opening to clamp the locking disc, obvious indication characteristics can be provided for the closing state of the valve, and the misjudgment of the closing state of the valve is avoided.

Inventors

  • LIU ZHIGANG
  • CHEN JIMENG

Assignees

  • 淄博沃泰斯石化设备有限公司

Dates

Publication Date
20260512
Application Date
20230221

Claims (10)

  1. 1. The utility model provides a limit moment of torsion auto-lock operating means for rotary operating mechanism, rotary operating mechanism is equipped with the operating shaft, its characterized in that, including handle frame (100), handle (200), locking dish (300) and retaining member (400), locking dish (300) are fixed rotary operating mechanism is last, the handle frame has operation axle sleeve (110), operation axle sleeve (110) cover is in on operating shaft (20) and drive operating shaft (20) rotate, handle (200) are equipped with actuating head (210), works as handle frame (100) and operating shaft (20) stop the rotation, actuating head (210) drive through spiral cooperation retaining member (400) compress tightly locking dish (300), the handle frame is equipped with top pressure spring (130), actuating head is equipped with drive ball socket (211), top pressure spring (130) are through top pressure ball (230) roof pressure actuating ball socket (211).
  2. 2. The torque-limiting self-locking operation device according to claim 1, wherein the driving head (210) is provided with a screw hole (212), the locking member (400) is provided with a stud (410), and the driving head (210) drives the locking member (400) through screw-fit when the operation handle rotates relative to the handle frame.
  3. 3. The torque limiting self-locking operation device according to claim 1, wherein the handle frame is provided with a self-locking clamp (120), the locking disc (300) is embedded into the self-locking clamp, the driving head (210) drives the locking piece (400) to press the self-locking clamp (120), and the self-locking clamp (120) clamps the locking disc (300).
  4. 4. A torque limiting self-locking operation device according to claim 3, wherein the locking member (400) is provided with a pressure plate (420), the pressure plate (420) is fixed on the outer side of the self-locking clamp, and the driving head (210) drives the pressure plate (420) to press the self-locking clamp (120).
  5. 5. The torque-limiting self-locking operation device according to claim 1, wherein the locking member (400) is provided with a pressure plate (420), the handle is provided with a locking guide hole (170), the pressure plate is provided with a locking guide pin (440), the locking guide pin (440) is in sliding fit with the locking guide hole (170), and the driving head (210) drives the pressure plate (420) to press the locking disc (300).
  6. 6. The torque-limiting self-locking operation device according to claim 1, wherein the driving ball socket (211) is a spherical groove corresponding to the pressing ball (230), the driving head is provided with a reset slope groove (213) and a locking slope groove (214), the reset slope groove (213) and the locking slope groove (214) are arc grooves corresponding to the pressing ball (230), the depth of the driving ball socket (211) is larger than that of the reset slope groove (213), when the operation handle rotates in the locking direction, the pressing ball (230) sequentially enters the reset slope groove (213) and the locking slope groove (214), the reset slope groove (213) is provided with a slope for enabling the pressing ball (230) to move in the direction of the driving ball socket (211), and the locking slope groove (214) is provided with a slope for enabling the pressing ball (230) to move in the direction away from the driving ball socket (211).
  7. 7. The torque limiting self-locking operating device according to claim 1, wherein the handle is provided with a spring sleeve (140), and the pressing spring (130) is arranged in the spring sleeve (140).
  8. 8. A torque limiting self-locking operating device according to claim 1, characterized in that the locking disc (300) is a butterfly-spring-shaped locking disc.
  9. 9. A torque limiting self-locking operating device according to claim 1, characterized in that the locking disc is fixed to the rotary operating mechanism by means of screws (310).
  10. 10. The torque-limiting self-locking operating device according to claim 1, wherein the torque-limiting self-locking operating device is an operating device mounted on a forced sealing ball valve, the rotating operating mechanism comprises a valve cover (1A), the operating shaft (20) is a valve rod, the locking disc is fixed on the valve cover (1A), the operating shaft sleeve (110) is sleeved on the valve rod (20) and drives the valve rod to rotate, in the process that the valve rod (20) drives the valve core (70) to rotate from an opening position to a closing position, the operating handle (200) rotates synchronously with the handle frame (100) and the valve rod (20) under the action of the pressing spring (130), and the operating handle continues to drive the handle frame and the valve rod to rotate towards the closing direction when the valve core is located at the closing position and drives the sealing valve clack (80) to press the valve seat (90), and then the handle frame and the valve rod stop rotating, and the locking piece (400) is driven to press the locking disc (300) against the acting force of the pressing spring.

Description

Torque limiting self-locking operation device Technical Field The invention belongs to a rotary operation device, and particularly relates to a torque-limiting self-locking operation device. Background In mechanical constructions, rotary drives are often provided with operating shafts, such as valve stems for valves and screw rods for bench clamps. Taking a valve as an example, an operating handle of the valve drives a valve rod to rotate, the operating handle is used for opening and closing operations of the valve, such as a ball valve and a butterfly valve, the operating handle rotates within a range of 90 degrees, and the position of the operating handle can indicate the opening and closing state of the valve. The handle should provide sufficient torque to ensure opening and closing of the valve and should also prevent torque overload from damaging the valve structure when the valve is closed. At the same time, the valve also requires locking the valve core and the operating handle in the closed position so that they reliably remain in the closed position. Therefore, an excellent handle structural design is important for the opening and closing operation and sealing performance of the valve. Furthermore, for the forced sealing ball valve, as disclosed in chinese patent application, a valve rod operating device of a forced sealing valve is disclosed (publication No. CN112361012 a), the valve rod drives the upper valve clack driving element and the lower valve clack driving element to rotate in the rotation stroke of opening and closing the valve, so as to realize opening and closing of the valve, the valve rod also rotates relative to the upper valve clack driving element and the lower valve clack driving element at the closing position of the valve, so as to drive the upper valve clack driving element and the lower valve clack driving element to move along the axis of the valve rod, and the upper valve clack driving element and the lower valve clack driving element drive the sealing valve clack to push against the valve seat, so as to realize forced sealing of the valve. The forced sealing valve is characterized in that the valve clack is pressed against the valve seat to realize forced sealing by the torque output by the operation device, the sealing can not be realized due to the too small torque, and valve parts can be damaged due to the too large torque. The operation handle after the forced sealing closing of the valve is completed does not stay at the normal valve closing position, and even is possibly overlapped at the opening position, so that difficulty is brought to the judgment of the opening and closing state of the valve by a valve operator, and misoperation is possibly generated. Disclosure of Invention The invention aims to provide a technical scheme of a torque-limiting self-locking operation device, which is applied to the field of valves, can steplessly output specific sealing torque, reliably lock the valve in a closed state and obviously display the closed state of the valve. In order to achieve the above purpose, the technical scheme of the invention is that the torque-limiting self-locking operation device is used for a rotary operation mechanism, the rotary operation mechanism is provided with an operation shaft and comprises a handle frame (100), an operation handle (200), a locking disc (300) and a locking piece (400), the locking disc (300) is fixed on the rotary operation mechanism, the handle frame is provided with an operation shaft sleeve (110), the operation shaft sleeve (110) is sleeved on the operation shaft (20) and drives the operation shaft (20) to rotate, the operation handle (200) is provided with a driving head (210), the driving head (210) drives the locking piece (400) to press the locking disc (300) through spiral matching, the handle frame is provided with a jacking spring (130), the driving head is provided with a driving ball socket (211), and the jacking spring (130) jacks the driving ball socket (211) through a jacking ball (230). Still further, in a preferred driving structure of the locking member, the driving head (210) is provided with a screw hole (212), the locking member (400) is provided with a stud (410), and when the operation handle rotates relative to the handle frame, the driving head (210) drives the locking member (400) through screw fit. Still further, one structure of the locking member pressing the locking disc is that the handle frame is provided with a self-locking clamping opening (120), the locking disc (300) is embedded into the self-locking clamping opening, the driving head (210) drives the locking member (400) to press the self-locking clamping opening (120), and the self-locking clamping opening (120) clamps the locking disc (300). Still further, in order to realize that the retaining member oppresses from the locking clamp, retaining member (400) is equipped with pressure disk (420), pressure disk (420) are fixed the outside of lo