阅读说明：本技术 一种可降低阀门操作力矩的驱动装置 (Driving device capable of reducing valve operation torque ) 是由 郑建军 郑宇钦 刘子杰 郑坤明 张阳秀 卢剑波 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种可降低阀门操作力矩的驱动装置,包括阀体、阀杆、连接块、伸缩弹簧、传动轴、下传动块、上传动块、传动螺套、阀芯、调节区、蜗轮、蜗杆、调节螺钉等。该驱动装置采用撞击式偏心的上传动块、下传动块、传动螺套,能快速的实现了传动轴直线与旋转运动的转换,利用伸缩弹簧缓冲挤压力解决了阀门自密封设计带来的操作力矩急剧增大导致开启失效的问题；利用伸缩弹簧装置拉伸力恢复了阀门自密封所需要的移动空间,成而即实现降低阀门操作力矩又不影响阀门自密封功能的设计构想。本发明可降低机械结构的受力,延长驱动装置的寿命。(The invention discloses a driving device capable of reducing valve operation torque, which comprises a valve body, a valve rod, a connecting block, a telescopic spring, a transmission shaft, a lower transmission block, an upper transmission block, a transmission threaded sleeve, a valve core, an adjusting area, a worm wheel, a worm, an adjusting screw and the like. The driving device adopts an impact type eccentric upper transmission block, a lower transmission block and a transmission threaded sleeve, can quickly realize the conversion of linear and rotary motion of a transmission shaft, and utilizes a telescopic spring to buffer extrusion force to solve the problem of opening failure caused by sharp increase of operation torque caused by self-sealing design of a valve; utilize expanding spring device tensile force to resume the required removal space of valve self sealss to realize reducing valve operating torque promptly and do not influence the design of valve self sealss function again and think. The invention can reduce the stress of the mechanical structure and prolong the service life of the driving device.)

1. A drive device capable of reducing valve operating torque is characterized in that: the method comprises the following steps: the valve rod (2), the box body (5), the worm wheel (8) and the worm (9), wherein the upper end of the valve rod (2) is fixedly connected with an expansion spring (21), the upper end of the expansion spring (21) is fixedly connected with a transmission shaft (7), one end of the transmission shaft (7) is sleeved on the upper part of the valve rod (2) so that the expansion spring (21) is positioned inside the transmission shaft (7), and the other end of the transmission shaft (7) penetrates through the box body (5) to be matched with the worm wheel (8); an upper groove (81) and a lower groove (82) are respectively formed in the upper end face and the lower end face of the worm wheel (8), a transmission threaded sleeve (83) penetrates through the middle of the worm wheel (8), the upper groove (81) and the lower groove (82) can be communicated through the transmission threaded sleeve (83), the upper groove (81), the lower groove (82) and the transmission threaded sleeve (83) are coaxially arranged, and the inner diameters of the upper groove (81) and the lower groove (82) are larger than the inner diameter of the transmission threaded sleeve (83);

the upper portion of transmission shaft (7) passes worm wheel (8) and with transmission swivel nut (83) threaded connection, one side fixedly connected with of transmission shaft (7) is eccentric settings's last transmission block 71 and lower transmission block (72), go up transmission block (71) and go up and down in last recess (81) internal rotation, lower transmission block (72) go up and down in lower recess (82) internal rotation, the lateral surface and the worm (9) transmission of worm wheel (8) are connected.

2. The driving device capable of reducing the valve operating torque according to claim 1, wherein: the valve body is characterized by further comprising a valve body (1), a connecting block (3) and a valve core (4), wherein a square groove (31) is formed in the middle of the connecting block (3), cross sections of two ends of the valve rod (2) are square, the lower end of the valve rod (2) is abutted to the square groove (31), a square boss (32) is fixed in the middle of the lower end face of the connecting block (3), the square boss (32) is abutted to a groove (41) formed in the upper end face of the valve core (4), the valve core (4) is in a frustum shape with a small upper end face and a large lower end face, a through hole (42) is horizontally formed in the middle of the valve core (4), an adjusting screw (43) is connected to the lower end face of the valve core (4) in a threaded manner, the valve rod (2), the connecting block (3), the valve core (4) and the adjusting screw (43) are arranged in the valve body (, and sealing grease is filled in the adjusting area (6).

3. The driving device capable of reducing the valve operating torque according to claim 1, wherein: bosses (84) fixedly connected with the worm wheel (8) are arranged on the bottom surface of an upper groove (81) and the top surface of a lower groove (82) of the worm wheel (8), the bosses (84) positioned in the upper groove (81) can be matched with the upper transmission block (71), and the bosses (84) positioned in the lower groove (82) can be matched with the lower transmission block (72).

4. A drive device capable of reducing valve operating torque according to claim 2, wherein: threaded hole (321) is opened to the bottom of square boss (32), threaded hole (321) embeds there is matched with buffer spring (322), and the lower terminal surface butt joint of buffer spring (322) has ball (10), and ball (10) are located recess (41), still set up in recess (41) and be less than semicircular and ball (10) matched with arc wall (44), and ball (10) are located arc wall (44), and vertically intercommunicating pore (45) have been seted up to the centre of case (4), intercommunicating pore (45) and horizontally perforating hole (42) and ball (10) intercommunication, ball (10) can seal intercommunicating pore (45).

5. A drive device capable of reducing valve operating torque according to claim 2, wherein: the upper portion of transmission shaft (7), go up transmission block (71), lower transmission block (72), transmission swivel nut (83), worm wheel (8), worm (9) all are located box (5), are provided with case lid (51) on box (5), be provided with bolt (52) on case lid (51), bolt (52) are for fixed connection box (5) and case lid (51).

Technical Field

The present invention relates to a driving device, and more particularly, to a driving device capable of reducing an operating torque of a valve.

Background

The drive device is a device for transmitting an operating torque to an industrial valve, such as a control valve or a shut-off valve, to adjust a regulator spool to a desired control position or a safety position to control the magnitude of the flow of a fluid. The device is generally applied to fluid operation conditions, such as pneumatic devices or hydraulic driving devices.

In the existing driving device for adjusting the opening and closing of fluid, a valve rod is forced to rotate through large torque so as to control a valve core to close and open the fluid, so that the possibility of fluid leakage caused by serious mechanical abrasion, short service life and even untight closing of the driving device can occur in the application process. In other driving devices, because there is no relative movement between the valve core and the valve rod, when the temperature and pressure changes in the inner cavity of the driving device are large, there is no buffer space for relative movement between the valve core and the valve rod, so that the valve core and the valve rod are directly stressed to generate a forced acting force, which finally affects the transmission accuracy, the fireproof sealing performance and the fluid tightness of the whole driving device, and thus needs to be improved.

Disclosure of Invention

The invention aims to provide a driving device capable of reducing the operating torque of a valve, which is used for pressure balance type oil seal cock valves and has the characteristics of small operating torque and self-adaptive compensation, so that the defects in the prior art are overcome, the service life of the device is prolonged, and the reliability of the device in the using process is improved.

The technical purpose of the invention is realized by the following technical scheme:

a drive assembly for reducing valve operating torque, comprising: the valve rod, the box body, the worm wheel and the worm, wherein the upper end of the valve rod is fixedly connected with an expansion spring, the upper end of the expansion spring is fixedly connected with a transmission shaft, one end of the transmission shaft is sleeved on the upper part of the valve rod, so that the expansion spring is positioned inside the transmission shaft, and the other end of the transmission shaft penetrates through the box body and is matched with the worm wheel; the upper end surface and the lower end surface of the worm wheel are respectively provided with an upper groove and a lower groove, a transmission threaded sleeve penetrates through the middle of the worm wheel, the upper groove and the lower groove can be communicated through the transmission threaded sleeve, the upper groove, the lower groove and the transmission threaded sleeve are coaxially arranged, and the inner diameter of the upper groove and the lower groove is larger than that of the transmission threaded sleeve;

the upper portion of transmission shaft passes the worm wheel and with transmission swivel nut threaded connection, one side fixedly connected with of transmission shaft is eccentric settings's last transmission block and lower transmission block, go up the transmission block at last recess internal rotation lift, lower transmission block goes up and down at the lower groove internal rotation, the lateral surface and the worm transmission of worm wheel are connected.

Furthermore, the device still includes valve body, connecting block, case, be provided with square groove in the middle of the connecting block, the both ends cross-section of valve rod is square, and the lower extreme butt of valve rod is in square inslot, is fixed with square boss in the middle of the lower terminal surface of connecting block, square boss butt is in the recess that the case up end was seted up, the case is the frustum form that the up end is little the terminal surface is big down, and the perforating hole has been seted up to the level in the middle of the case, and terminal surface threaded connection has adjusting screw under the case, valve rod, connecting block, case, adjusting screw are in the valve body, there is the regulation district between case, connecting block, valve body, the valve rod, the intussusepti.

Furthermore, bosses fixedly connected with the worm wheel are respectively arranged on the bottom surface of the upper groove and the top surface of the lower groove of the worm wheel, the bosses positioned in the upper groove can be matched with the upper transmission block, and the bosses positioned in the lower groove can be matched with the lower transmission block.

Further, threaded hole is opened to the bottom of square boss, threaded hole embeds has matched with buffer spring, and buffer spring's lower terminal surface has supported and has connect the ball, and the ball is located the recess, still set up less than semicircle and ball matched with arc wall in the recess, the ball is located the arc recess, and the vertically intercommunicating pore has been seted up to the centre of case, intercommunicating pore and horizontally perforating hole and ball intercommunication, the intercommunicating pore can be sealed to the ball.

Further, the upper portion of transmission shaft, go up transmission block, lower transmission block, transmission swivel nut, worm wheel, worm all are located the box, are provided with the case lid on the box, be provided with the bolt on the case lid, the bolt is used for fixed connection box and case lid.

The driving device capable of reducing the valve operation torque provided by the invention has the following beneficial effects: the impact type eccentric transmission block and the transmission threaded sleeve are adopted, the conversion between linear motion and rotary motion of the transmission shaft can be quickly realized, when the valve is fully closed and the valve is opened anticlockwise, the transmission shaft firstly moves downwards to compress the spring, pushes the valve core to be separated from the sealing surface of the valve body, and then the operation is carried out by rotating 90 degrees, so that the operation torque is reduced; when the valve is closed in a fully-opened clockwise mode, the expansion spring resets and pulls the valve rod to move upwards when the valve is close to the fully-closed position of the valve, and then the valve rod is rotated by 90 degrees to ensure that a space for the valve core to move upwards freely due to pressure balance so as to realize the function of automatic compensation of sealing specific pressure under high pressure. The invention can reduce the stress of the mechanical structure and prolong the service life of the driving device.

Drawings

FIG. 1 is a cross-sectional view of a drive assembly for reducing the operating torque of a valve;

FIG. 2 is a sectional view of a portion of the interior of the case of FIG. 1;

FIG. 3 is a cross-sectional view of a portion of the structure within the valve body of FIG. 1;

fig. 4 is a schematic view of a valve closing state of an actuator for reducing the valve operating torque.

Reference numerals: 1. a valve body; 2. a valve stem; 21. a tension spring; 3. connecting blocks; 31. a square groove; 32. a square boss; 321. a threaded hole; 322. a buffer spring; 4. a valve core; 41. a groove; 42. a through hole; 43. an adjusting screw; 44. an arc-shaped slot; 45. a communicating hole; 5. a box body; 51. a box cover; 52. a bolt; 6. a regulatory region; 7. a drive shaft; 71. uploading a transmission block; 72. a lower transmission block; 8. a worm gear; 81. an upper groove; 82. a lower groove; 83. a transmission threaded sleeve; 84. a boss; 9. a worm; 10. a round ball.

Detailed Description

The driving device for reducing the valve operating torque according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, a driving apparatus for reducing an operation torque of a valve includes: the valve rod 2, the box body 5, the worm wheel 8 and the worm 9, wherein the upper end of the valve rod 2 is fixedly connected with an expansion spring 21, the upper end of the expansion spring 21 is fixedly connected with a transmission shaft 7, one end of the transmission shaft 7 is sleeved on the upper part of the valve rod 2, so that the expansion spring 21 is positioned inside the transmission shaft 7, and the other end of the transmission shaft 7 penetrates through the box body 5 to be matched with the worm wheel 8; the upper end surface and the lower end surface of the worm wheel 8 are respectively provided with an upper groove 81 and a lower groove 82, a transmission threaded sleeve 83 penetrates through the middle of the worm wheel 8, the upper groove 81 and the lower groove 82 can be communicated through the transmission threaded sleeve 83, the upper groove 81, the lower groove 82 and the transmission threaded sleeve 83 are coaxially arranged, and the inner diameters of the upper groove 81 and the lower groove 82 are larger than the inner diameter of the transmission threaded sleeve 83;

the upper portion of transmission shaft 7 passes worm wheel 8 and with transmission swivel nut 83 threaded connection, one side fixedly connected with of transmission shaft 7 is eccentric settings's last transmission block 71 and lower transmission block 72, go up transmission block 71 and go up and down in last recess 81 internal rotation, lower transmission block 72 goes up and down in lower groove 82 internal rotation, the lateral surface and the worm 9 transmission of worm wheel 8 are connected.

The telescopic spring 21 fixedly connected with the valve rod 2 has the instant acting force to the valve rod 2 in the downward moving process of the buffer transmission shaft 7, the service life of the valve rod 2 is prolonged, the valve rod 2 can be connected to drive the valve rod 2 to rotate and move upwards together, and the spring 21 has the elasticity so as to drive the valve rod 2 to move upwards with a small amplitude.

The box 5 can protect the parts inside. The worm wheel 8 can transmit the power provided by the worm 9 to the transmission shaft 7 through the transmission threaded sleeve 83, and the transmission shaft 7 can transmit the power to the extension spring 21 and the valve rod 2 which are positioned inside the transmission shaft 7. The upper and lower grooves 81 and 82 limit the rotational elevation range of the upper and lower drive blocks 71 and 72.

The device still includes valve body 1, connecting block 3, case 4, be provided with square groove 31 in the middle of the connecting block 3, the both ends cross-section of valve rod 2 is square, and the lower extreme butt of valve rod 2 is in square groove 31, is fixed with square boss 32 in the middle of the lower terminal surface of connecting block 3, square boss 32 butt is in the recess 41 that the up end was seted up of case 4, case 4 is the frustum form that the up end is little the terminal surface big, and the perforating hole 42 has been seted up to the level in the middle of the case 4, and terminal surface threaded connection has adjusting screw 43 under the case 4, valve rod 2, connecting block 3, case 4, adjusting screw 43 are in valve body 1, there is regulating region 6 between case 4, connecting block 3, valve body 1, the valve rod 2, the intussuseption of regulating region 6 is.

Both ends are square valve rod 2 and can transmit rotary power for valve rod 2 by transmission shaft 7, and then transmit for the connecting block 3 that has square groove 31, and connecting block 3 transmits rotary power and decurrent effort for case 4 that has recess 41 through the square boss 32 of its bottom is fixed to drive case 4 rotatory and move down. The stability of the valve core 4 can be improved by the small upper end surface and the large lower end surface of the valve core 4, and the valve core 4 can move downwards conveniently. The horizontal through-holes 42 are channels through which fluid flows. Since the valve core 4 is worn due to long-term use, the sealing effect between the valve core 4 and the connecting block 3 is kept unchanged by adjusting the height of the valve core 4 by the adjusting screw 43. The valve body 1 comprises the valve rod 2, the connecting block 3 and the valve core 4 to form a closed space, so that an adjusting area 6 is formed, and the adjusting area 6 can provide a pressure automatic compensation space for the valve core 4 in a working state. The sealing grease in the regulating zone 6 has a lubricating and sealing effect.

Bosses 84 fixedly connected with the worm wheel 8 are arranged on the bottom surface of the upper groove 81 and the top surface of the lower groove 82 of the worm wheel 8, the bosses 84 in the upper groove 81 can be matched with the upper transmission block 71, and the bosses 84 in the lower groove 82 can be matched with the lower transmission block 72.

The boss 84 can limit the upper transmission block 71 and the lower transmission block 72 to prevent the transmission shaft 7 from rotating relative to the worm wheel 8, and also prevent the transmission shaft 7 from directly rubbing against the worm 8.

It is worth noting that when the fluid in the valve core 4 is used for the tightness of the combustion test detection valve, the temperature in the valve body 1 rises after combustion, and the pressure in the valve body 1 is increased by the gas generated after combustion, the valve core moves upwards, and the volume of the adjusting area 6 between the connecting block 3 and the valve core 4 is reduced, so that the sealing specific pressure automatic compensation is realized, the sealing effect of the valve core is ensured, the moment for opening the valve is increased at the moment, and even the valve opening failure is caused.

In the embodiment, when the valve is switched from a closed state to an open state, the worm 9 is rotated counterclockwise to drive the worm wheel 8 to rotate forward, the worm wheel 8 enables the transmission shaft 7 to move downward through the transmission threaded sleeve 83, the expansion spring 21 is compressed, the valve rod 2 moves downward until the connecting block 3 abuts against the valve core 4 and pushes the valve core 4 to move downward, so that the valve core 4 is separated from the sealing surface of the valve body 1, at this time, the upper transmission block 71 abuts against the boss 84, then the worm 9 is continuously rotated to enable the valve rod 2, the connecting block 3 and the valve core 4 to rotate for 90 degrees and then the valve is opened, the valve core 4 is damaged in a 'wedge-dead' state with the sealing surface of the valve body 1 due to an upward acting force given by high-pressure fluid, and the problem that the valve. The drive shaft 7 and the valve stem 2 undergo two stages of descent and rotation during the opening of the valve.

Threaded hole 321 is opened to the bottom of square boss 32, threaded hole 321 embeds there is matched with buffer spring 322, and buffer spring 322's lower terminal surface has been met and has been had ball 10, and ball 10 is located recess 41, still set up the arc wall 44 less than semicircular and ball 10 matched with in the recess 41, ball 10 is located arc recess 44, and vertically intercommunicating pore 45 has been seted up to the centre of case 4, intercommunicating pore 45 communicates with horizontally perforating hole 42 and ball 10, ball 10 can seal intercommunicating pore 45.

Screw hole 321 can be better agrees with buffer spring 322, prevents that buffer spring 322 from dropping, and ball 10 can play the effect of shutoff intercommunicating pore 45, and arc recess 44 makes the position of ball more stable, and sealed effect is also better, and intercommunicating pore 45 and perforating hole 42 regard as the fluid circulation passageway. When the valve core 4 is subjected to a large pressure transmitted by the upper connecting block 3, the buffer spring 322 can play a role in buffering the pressure, when the fluid pressure passing through the through hole 42 in the valve core 4 is large, the ball 10 can be pushed upwards, the buffer spring 322 can buffer the ascending pressure at the moment to stabilize the sealing specific pressure, and the sealing insecurity is avoided.

When the valve is switched to a state of closing the valve from an opening state, the worm gear 9 is rotated clockwise to drive the worm gear 8 to rotate reversely, the worm gear 8 enables the transmission shaft 7 to move upwards through the transmission threaded sleeve 83, the extension spring 21 is stretched, the extension spring 21 is fixedly connected with the valve rod 2, so that the valve rod 2 is driven to move upwards, pressure on the connecting block 3 disappears due to the fact that the valve rod 2 moves upwards, the volume of the adjusting area 6 between the connecting block 3 and the valve rod 2 is increased, the pressure automatic compensation space of the valve core 4 is increased, fire disasters caused by rapid rise of pressure in the valve body 1 can be avoided, and the valve core 4 cannot be sealed due to loss of the. In the process of closing the valve, the transmission shaft 7 and the valve rod 2 undergo two stages of ascending and descending and rotation, the transmission shaft 7 moves upwards, the lower transmission block 72 impacts on the boss 84, the transmission shaft 7 stops moving upwards, the worm 9 is continuously rotated, the transmission shaft 7 is converted into rotary motion, and at the moment, the valve rod 2, the connecting block 3 and the valve core 4 rotate by 90 degrees and then the valve is closed.

The upper portion of the transmission shaft 7, the upper transmission block 71, the lower transmission block 72, the transmission threaded sleeve 83, the worm wheel 8 and the worm 9 are all located in the box body 5, a box cover 51 is arranged on the box body 5, a bolt 52 is arranged on the box cover 51, and the bolt 52 is used for fixedly connecting the box body 5 and the box cover 51.

The box body 5 and the box cover 51 can form a relatively isolated space, protect the internal parts thereof from intrusion of sundries, and also protect the safety of operators. The bolts 52 may fasten the connection between the case 5 and the case cover 51.

The extension spring 21 may be a hydraulic device or a pneumatic device.

The specific embodiments are only for explaining the present invention, and the present invention is not limited thereto, and those skilled in the art can make modifications without inventive contribution to the present embodiments as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.