CN209196246U - A kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve - Google Patents

Abstract

The utility model discloses a kind of pneumatic piston actuating mechanisms with disengaging type man-operated mechanism for gate valve, including pneumatic actuator and disengaging type manual-operating mechanism, the pneumatic actuator includes cylinder body, upper end cover, lower cover, piston and piston rod, and the disengaging type manual-operating mechanism includes bracket, handwheel, screw nut driven structure and push rod；The bracket is fixed on the top of the upper end cover, the upper end of the piston rod passes through the piston, the lower end of the push rod passes through the upper end cover and connect with the upper end of the piston rod, and the lower end of the piston rod passes through the lower cover, and the piston rod is doubled as by the valve rod of valve.The utility model can effectively reduce the distance between pneumatic actuator and valve closing member, reduce the height of valve entirety, there is no the problem of concentricity between piston rod and valve rod, it reduces because component of rod category connection causes straightness to decline bring additional wear, improves the operation stability of valve and executing agency.

Description

A kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve

Technical field

The utility model relates to valve fields, relate in particular to a kind of gas with disengaging type man-operated mechanism for gate valve Piston executing agency.

Background technique

In large-scale oil refining apparatus, chemical plant installations and storage tank field, many switch gate valves are used, have been situated between for cutting off in pipeline The on-off of matter, because cost of human resources increases year by year, and one valve times of switch are longer, and labor intensity is larger, there is an urgent need to It is replaced using automation equipment artificial, improves working efficiency, and because such operating condition generally has a higher flame proof requirement, one As electric operator be unable to satisfy its requirement, and the electric operator for meeting its flame proof requirement is at high cost, so, pneumatically Executing agency becomes the first choice of driving device, and for force switch valve under special circumstances, pneumatically start executing agency Need band disengaging type manual-operating mechanism.

The scheme that traditional pneumatic actuator with disengaging type manual-operating mechanism uses is: disengaging type manual operation machine Structure is fixed on the lower end of pneumatic actuator, and the piston rod of pneumatic actuator passes through disengaging type manual-operating mechanism, disengaging type The push rod of manual-operating mechanism and the valve rod of gate valve connect, in use, disengaging type manual-operating mechanism is fixed on valve, pneumatically It is connected between the piston rod of executing agency and the valve rod of gate valve using screw thread and fixture block.

This structure is connected because using fixture block, and increasing whole height, (fixture block at least needs to act in non-sealed regions One stroke height), it is larger to requirements of installation space, while axial workpiece is in and is fixedly connected, concentricity is more demanding.

Utility model content

It is high for the existing pneumatic actuator whole height with disengaging type manual-operating mechanism, to requirements of installation space compared with Greatly, while axial workpiece is in and is fixedly connected, and the more demanding technical problem of concentricity, the utility model provides one kind can Height is reduced, the pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve that concentricity requires is reduced.

In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution: a kind of band clutch for gate valve The pneumatic piston actuating mechanism of formula man-operated mechanism, including pneumatic actuator and disengaging type manual-operating mechanism, it is described pneumatically to hold Row mechanism includes cylinder body, upper end cover, lower cover, piston and piston rod, and the disengaging type manual-operating mechanism includes bracket, hand Wheel, screw nut driven structure and push rod；The bracket is fixed on the top of the upper end cover, and the upper end of the piston rod is worn The piston is crossed, the lower end of the push rod passes through the upper end cover and connect with the upper end of the piston rod, under the piston rod Across the lower cover, the piston rod is doubled as by the valve rod of valve at end.

Further, the upper end of the push rod is provided with pin hole, and the upper end of the push rod passes through the pin shaft across the pin hole It is detachably connected with the lead screw of the screw nut driven structure.

Further, the bracket is equipped with valve stroke dial, and the upper end of the push rod, which is equipped with, is used for valve stroke The instruction structure of instruction, the instruction structure include that the first segmentation ring, the first pressure ring, the first circlip for shaft and stroke refer to Needle, the upper end of the push rod successively open the first circlip for shaft installing groove and the first segmentation ring mounting groove from top to bottom Slot, the first segmentation ring set is located in the first segmentation ring installing groove and is connected by screw and the push rod, described First pressure ring is set in the upper end of the push rod and is located at the upside of the first segmentation ring, the first circlip for shaft set It is located in the first circlip for shaft installing groove and is located at the upside of first pressure ring, the stroke pointer is fixed on On first pressure ring.

Further, plate-like, the stroke pointer are coaxially fixed on first pressure ring to the stroke pointer in a ring Upper surface.

Further, the first shaft hole passed through for the push rod, the hole wall of the first shaft hole are provided on the upper end cover On be sequentially installed with the first dustband, the first O-ring and the first oilless bearing from top to bottom, it is anti-that the push rod passes through described first Konisphere, first O-ring and first oilless bearing.

Further, the piston rod, which is used, is connect with flowering structure with the piston: second point is provided on the piston rod Ring installing groove and third segmentation ring installing groove are cut, is arranged with the second segmentation ring, institute in the second segmentation ring installing groove It states and is arranged with third segmentation ring in third segmentation ring installing groove, the second segmentation ring is located at the upside of the piston, the third Segmentation ring is located at the downside of the piston, and the upper end of the piston rod is also arranged with the second pressure ring, and second pressure ring is located at institute The upside of the second segmentation ring is stated, the upper end of the push rod is also provided with the second circlip for shaft installing groove, and second axis is used The second circlip for shaft is arranged in circlip installing groove, second circlip for shaft is located at second pressure ring Upside.

Further, the lower end of the push rod, which is used, is connect with flowering structure with the upper end of the piston rod: link block is provided, The first threaded hole is provided at the top of the link block, bottom is provided with the second threaded hole, the lower end of the push rod is formed with external screw thread, institute The lower thread for stating push rod is connected in first threaded hole and is locked by fastening screw nut, and the upper end of the piston rod is also made There is external screw thread, the upper end of the piston rod is threaded with locking nut and gland nut, and the gland nut from top to bottom Outer peripheral surface be formed with external screw thread, the locking nut and the gland nut protrude into second threaded hole, the gland spiral shell It is female to be threadedly engaged with second threaded hole.

Further, the second axis hole passed through for the piston rod, the hole of second axis hole are provided on the lower cover The second dustband, the second O-ring and the second oilless bearing are successively arranged on wall from bottom to up, the piston rod passes through described second Dustband, second O-ring and second oilless bearing.

The beneficial effects of the utility model are embodied in:

Disengaging type manual-operating mechanism is arranged in pneumatic actuator, in use, pneumatic actuator the utility model It is directly connect with valve, in this way, piston rod without disengaging type manual-operating mechanism is needed guiding through, directly doubles as piston with the valve rod of valve Bar, is also equivalent to valve rod and piston rod designs for integral type, is a whole bar, thus be omitted in traditional mechanism piston rod and Valve rod connects the screw thread and fixture block used, can effectively reduce the distance between pneumatic actuator and valve closing member, reduces The height of valve entirety, has reserved stuffing-box operating space, is also able to achieve valve and works online under state to leaking into outside stuffing-box Row pre-tightens and repair and replacement processing reduces moreover, not having the problem of concentricity between piston rod and valve rod because of component of rod category Connection causes straightness to decline bring additional wear, improves the operation stability of valve and executing agency, improves simultaneously The rigidity of thin and long shafts part guarantees the stability of transmitting thrust between valve rod, can improve the job stability of Pneumatic gate valve, saves Installation space is saved, has been obtained good using feedback.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of an embodiment of the present invention.

Fig. 2 is enlarged drawing at A.

Fig. 3 is the structural exploded view of Tu2Zhong indicating mechanism.

Fig. 4 is enlarged drawing at B.

Fig. 5 is the structural exploded view of Fig. 4.

The label of each component in attached drawing are as follows: 10 pneumatic actuators, 11 cylinder bodies, 12 upper end covers, 13 lower covers, 14 pistons, 15 piston rods, 151 second segmentation ring installing grooves, 152 thirds segmentation ring installing groove, the installation of 153 second circlip for shaft Groove, 20 disengaging type manual-operating mechanisms, 21 brackets, 22 handwheels, 23 push rods, 231 pin holes, 232 first circlip for shaft peace Fill groove, 233 first segmentation ring installing grooves, 30 valves, 41 valve stroke dials, 42 first segmentation rings, 43 first pressure rings, 44 first circlip for shaft, 45 stroke pointers, 51 second segmentation rings, 52 thirds segmentation ring, 53 second pressure rings, 54 second axis are used Circlip, 61 link blocks, 611 first threaded holes, 612 second threaded holes, 62 fastening screw nuts, 63 locking nuts, 64 gland spiral shells Mother, 71 first dustbands, 72 first O-rings, 73 first oilless bearings, 74 second dustbands, 75 second O-rings, 76 second nothings Oil bearing.

Specific embodiment

It is described in detail the utility model below with reference to the accompanying drawings.It should be noted that in the absence of conflict, this Shen Please in embodiment and embodiment in feature can be combined with each other.

Referring to Fig. 1.

A kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve of the utility model, including it is pneumatic Executing agency 10 and disengaging type manual-operating mechanism 20, the pneumatic actuator 10 include cylinder body 11, upper end cover 12, lower cover 13, piston 14 and piston rod 15, the disengaging type manual-operating mechanism 20 include bracket 21, handwheel 22, screw nut driven knot Structure and push rod 23；The bracket 21 is fixed on the top of the upper end cover 12, and the upper end of the piston rod 15 passes through the work Plug 14, the lower end of the push rod 23 pass through the upper end cover 12 and connect with the upper end of the piston rod 15, the piston rod 15 Lower end passes through the lower cover 13, and the piston rod 15 is doubled as by the valve rod of valve.

Disengaging type manual-operating mechanism is arranged in pneumatic actuator, in use, pneumatic actuator the utility model It is directly connect with valve, in this way, piston rod without disengaging type manual-operating mechanism is needed guiding through, directly doubles as piston with the valve rod of valve Bar, is also equivalent to valve rod and piston rod designs for integral type, is a whole bar, thus be omitted in traditional mechanism piston rod and Valve rod connects the screw thread and fixture block used, can effectively reduce the distance between pneumatic actuator and valve closing member, reduces The height of valve entirety, has reserved stuffing-box operating space, is also able to achieve valve and works online under state to leaking into outside stuffing-box Row pre-tightens and repair and replacement processing reduces moreover, not having the problem of concentricity between piston rod and valve rod because of component of rod category Connection causes straightness to decline bring additional wear, improves the operation stability of valve and executing agency, improves simultaneously The rigidity of thin and long shafts part guarantees the stability of transmitting thrust between valve rod, has obtained good using feedback.

This structure of the utility model can effectively reduce the height of valve, reduce installation space；Pneumatic execution machine can be reduced The distance between structure and valve opening and closing element have better rigidity so that making valve rod shorter；Valve rod closes two with cylinder push-rod One, piston is greatly reduced to the distance of opening and closing element, improves the stability of component of rod category；More compact structure reduces total height, subtracts Small installation space；Valve rod rigidity is improved, ensure that sealing performance, while improving valve whole service life；Suitably reduce Concentricity requirement between component, improves assembly qualified rate of product.

Feed screw nut rotational structure is the common movement mechanism of machinery field for converting rotary motion to linear motion, is For the sake of concise description, do not show in figure, for disengaging type manual-operating mechanism, in use, rotation handwheel, handwheel, that is, belt wheel lead screw spiral shell The nut of parent structure rotates, and is then converted into the linear motion of the lead screw of feed screw nut rotational structure, pushes away in the drive of then lead screw Bar moves along a straight line, can controlled valve.

When specific installation, lower cover 13 is fixed on valve 30, end cap 13 be fixed between valve 30 using column and Transition disc carries out conversion installation, can guarantee preferable concentricity.

In one embodiment, the upper end of the push rod 23 is provided with pin hole 231, and the upper end of the push rod 23 is described by passing through The pin shaft of pin hole 231 and the lead screw of the screw nut driven structure are detachably connected.The function of manual operation clutch is realized with this Energy.Design in this way, manual-operating mechanism can be completely disengaged when pneumatic actuator be under aerodynamic condition, reduce because of Handwheel bring transmission efficiency reduces and stable working performance influences, meanwhile, fully take into account valve and executing agency The compactedness of connection reduces the length that valve bears the component of rod category of thrust, increases the rigidity of valve rod.

Under auto state, pin shaft is pulled up, push rod is separated with screw rod, it can be achieved that Pneumatic automatic control, needs under the state of emergency When wanting manual, handwheel is shaken, after pin hole is aligned, pin shaft is reinserted, connect push rod with lead screw, manual behaviour can be realized Make.

In one embodiment, the bracket 21 is equipped with valve stroke dial 41, and the upper end of the push rod 23, which is equipped with, to be used In the instruction structure of 30 stroke of valve instruction, the instruction structure includes the first segmentation ring 42, the first pressure ring 43, first axle bullet Property retaining ring 44 and stroke pointer 45, the upper end of the push rod 23 successively open the first circlip for shaft mounting groove from top to bottom Slot 232 and the first segmentation ring installing groove 233, the first segmentation ring 42 are set in the first segmentation ring installing groove 233 Interior and be connected by screw and the push rod 23, first pressure ring 43 is set in the upper end of the push rod 23 and is located at described the The upside of one segmentation ring 42, first circlip for shaft 44 are set in the first circlip for shaft installing groove 232 Upside that is interior and being located at first pressure ring 43, the stroke pointer 45 are fixed on first pressure ring 43.

In connection, the first segmentation ring is first installed for limiting the position of stroke pointer then the first pressure ring is installed, the One pressure ring is detached from its installing groove by its inner wall limitation the first segmentation ring, and stroke pointer is mounted on the first pressure ring by screw On, secondly, the first circlip for shaft of installation, limits pressing ring axial freedom, finally, installing clamp screw on the first segmentation ring Nail, for reducing pointer because there are the shakings that gap leads to display.

In one embodiment, plate-like, the stroke pointer 45 are coaxially fixed on described to the stroke pointer 45 in a ring The upper surface of one pressure ring 43.It designs in this way, the installation of stroke pointer is more firm, is easy instruction.

In one embodiment, the first shaft hole passed through for the push rod 23, the first axle are provided on the upper end cover 12 The first dustband 71, the first O-ring 72 and the first oilless bearing 73, the push rod are sequentially installed on the hole wall in hole from top to bottom 23 pass through first dustband 71, first O-ring 72 and first oilless bearing 73.First dustband plays dust-proof Effect, the first O-ring plays the role of sealing, and the first oilless bearing, which plays, guarantees push rod rotation smoothly.

In one embodiment, the piston rod 15, which is used, is connect with flowering structure with the piston 14: on the piston rod 15 It is provided with the second segmentation ring installing groove 151 and third segmentation ring installing groove 152, described second divides in ring installing groove 151 It is arranged with the second segmentation ring 51, third segmentation ring 52, the second segmentation ring 51 are arranged in the third segmentation ring installing groove 152 Positioned at the upside of the piston 14, the third segmentation ring 52 is located at the downside of the piston 14, the upper end of the piston rod 15 It is also arranged with the second pressure ring 53, second pressure ring 53 is located at the upside of the second segmentation ring 51, the upper end of the push rod 23 It is also provided with the second circlip for shaft installing groove 153, is arranged with second in the second circlip for shaft installing groove 153 Circlip for shaft 54, second circlip for shaft 54 are located at the upside of second pressure ring 53.

The utility model abandons traditional threaded form, using double segmentation ring mounting structures, when installation, by Two, three segmentation rings are packed into corresponding installing groove, carry out axial limiting using segmentation ring and cylinder, limitation segmentation ring is detached from, real Existing position-limiting action, changes the limit method realized using conventional method, increases the bonding strength of junction, and the second pressure ring is used It being detached from limitation segmentation ring, circlip for shaft is for preventing pressure ring axial direction activity from causing the problem of dividing ring failure, and two points It cuts ring and thrust is provided, safety coefficient is higher, and deformation is smaller, solves the problems, such as thread connection anti-loose, while reducing installation space；

Using above-mentioned design, there is no limit the rotary motions of valve rod and piston, remain the freedom degree of rotation, can be more preferable Guarantee executing agency during the work time, piston region can suitably rotate in the case where discontinuity, adjust stress Situation.

Using above-mentioned design, installation space is significantly reduced, meanwhile, solve the technical problem of thread connection anti-loose, In installation, quick detachable installation can be realized, meanwhile, using segmentation ring structure, it can guarantee that valve deck/push rod connects The intensity for meeting place is not needed to be positioned using stepped construction, facilitates the processing and assembly of axial workpiece, using on piston Groove carries out radial positioning to segmentation ring, can effectively reduce the space that connection needs, and safe and reliable.

In one embodiment, the lower end of the push rod 23, which is used, is connect with flowering structure with the upper end of the piston rod 15: being mentioned For link block 61, the top of the link block 61 is provided with the first threaded hole 611, bottom is provided with the second threaded hole 612, the push rod 23 lower end is formed with external screw thread, and the lower thread of the push rod 23 is connected in first threaded hole 611 and passes through and tight spiral shell Mother 62 locks, and the upper end of the piston rod 15 is also formed with external screw thread, and the upper end of the piston rod 15 is threaded with from top to bottom Locking nut 63 and gland nut 64, and the outer peripheral surface of the gland nut 64 is formed with external screw thread, the locking nut 63 and institute It states gland nut 64 to protrude into second threaded hole 612, the gland nut 64 is matched with 612 screw thread of the second threaded hole It closes.

During installation, first gland nut is inserted on piston rod according to installation direction, then screws on locking nut, pre-tightened Spot welding is locking afterwards, and then connector is mounted on push rod, screws on fastening screw nut with simultaneously tight locking, finally, by piston rod upper end It protrudes into the second threaded hole, turn gland nut, realizes effectively connection, after connecting, spot welding is locking.

It is fixedly connected using traditional, usually because concentricity is bad, leads to valve rod or push rod side serious wear, lead Seal failure is caused, the service life of valve or executing agency is seriously affected.

And the utility model does above-mentioned design, then can reduce the requirement of concentricity between piston rod and push rod, piston rod There is adjustable space between push rod, be flexibly connected, accordingly even when the oilless bearing concentricity of end cap is bad up and down, it will not The problem of being formed and squeezed between piston rod and push rod, leading to seal failure, realizes detachable between push rod and piston rod It is actively coupled, reduces concentricity requirement of the entire mechanism to axis class, improve service performance, activity connects between push rod and piston rod It connects, lower to concentricity requirement, service life and performance are obviously improved.

It is clearance fit at following two in this structure:

(1) outer circle of gland nut and piston rod is clearance fit, not will form positioning in this way, can be to bad in concentricity In the case where adjustment appropriate.

(2) piston rod and the second threaded hole of connector bottom are clearance fits, are unlikely in this way when tightening gland nut, Because the locking nut of piston rod, which is withstood, to be tightened, while there are appropriate gaps, can be with compensating coaxial degree error.

In one embodiment, it is provided with the second axis hole passed through for the piston rod 15 on the lower cover 13, described second The second dustband 74, the second O-ring 75 and the second oilless bearing 76, the piston are successively arranged on the hole wall of axis hole from bottom to up Bar 15 passes through second dustband 74, second O-ring 75 and second oilless bearing 76.Its effect is same as above.

The utility model devises a set of top dress Ponds handwheel, is installed in cylinder head, being arranged so effectively to drop The distance between low cylinder and valve closing member improve the rigidity of thin and long shafts part, and transmitting thrust is steady between guarantee valve rod It is qualitative.

It should be understood that example as described herein and embodiment are not intended to limit the utility model only for explanation, this Field technical staff can make various modifications or variation according to it, within the spirit and principle of the utility model, made Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this utility model.

Claims (8)

1. a kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve, including pneumatic actuator and clutch Formula manual-operating mechanism, the pneumatic actuator include cylinder body, upper end cover, lower cover, piston and piston rod, the disengaging type Manual-operating mechanism includes bracket, handwheel, screw nut driven structure and push rod；It is characterized by: the bracket is fixed on The top of the upper end cover, the upper end of the piston rod pass through the piston, the lower end of the push rod pass through the upper end cover with The upper end of the piston rod connects, and the lower end of the piston rod passes through the lower cover, and the piston rod is simultaneous by the valve rod of valve Make.

2. a kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve according to claim 1, Be characterized in that: the upper end of the push rod is provided with pin hole, and the upper end of the push rod passes through the pin shaft and the silk across the pin hole The lead screw of thick stick nut drive mechanism is detachably connected.

3. a kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve according to claim 1 or 2, It is characterized by: the bracket is equipped with valve stroke dial, the upper end of the push rod is equipped with for valve stroke instruction Instruction structure, the instruction structure include the first segmentation ring, the first pressure ring, the first circlip for shaft and stroke pointer, institute The upper end for stating push rod successively opens the first circlip for shaft installing groove and the first segmentation ring installing groove from top to bottom, described First segmentation ring set is located in the first segmentation ring installing groove and is connected by screw and the push rod, first pressure ring It is set in the upper end of the push rod and is located at the upside of the first segmentation ring, first circlip for shaft is set in described Upside in first circlip for shaft installing groove and positioned at first pressure ring, the stroke pointer are fixed on described first On pressure ring.

4. a kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve according to claim 3, Be characterized in that: plate-like, the stroke pointer are coaxially fixed on the upper surface of first pressure ring to the stroke pointer in a ring.

5. a kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve according to claim 1 or 2, It is characterized by: the first shaft hole passed through for the push rod is provided on the upper end cover, from upper on the hole wall of the first shaft hole Be sequentially installed with the first dustband, the first O-ring and the first oilless bearing under, the push rod pass through first dustband, First O-ring and first oilless bearing.

6. a kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve according to claim 1 or 2, It is connect with flowering structure with the piston it is characterized by: the piston rod is used: being provided with the second segmentation ring peace on the piston rod It fills groove and third divides ring installing groove, be arranged with the second segmentation ring, the third in the second segmentation ring installing groove Third segmentation ring is arranged in segmentation ring installing groove, the second segmentation ring is located at the upside of the piston, and the third divides ring Positioned at the downside of the piston, the upper end of the piston rod is also arranged with the second pressure ring, and second pressure ring is located at described second Divide the upside of ring, the upper end of the push rod is also provided with the second circlip for shaft installing groove, second axis elasticity gear It is arranged with the second circlip for shaft in circle installing groove, second circlip for shaft is located at the upper of second pressure ring Side.

7. a kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve according to claim 1 or 2, It is connect with flowering structure with the upper end of the piston rod it is characterized by: the lower end of the push rod is used: link block, the company is provided Connect and be provided with the first threaded hole at the top of block, bottom is provided with the second threaded hole, the lower end of the push rod is formed with external screw thread, the push rod Lower thread be connected in first threaded hole and by fastening screw nut locking, the upper end of the piston rod is also formed with outer spiral shell Line, the upper end of the piston rod are threaded with locking nut and gland nut, and the periphery of the gland nut from top to bottom Wheat flour has external screw thread, and the locking nut and the gland nut protrude into second threaded hole, the gland nut and institute The second threaded hole is stated to be threadedly engaged.

8. a kind of pneumatic piston actuating mechanism with disengaging type man-operated mechanism for gate valve according to claim 1 or 2, It is characterized by: be provided with the second axis hole passed through for the piston rod on the lower cover, on the hole wall of second axis hole from Under it is supreme be successively arranged the second dustband, the second O-ring and the second oilless bearing, it is dust-proof that the piston rod passes through described second Circle, second O-ring and second oilless bearing.