CN204691739U - A kind of pylon oil pumper - Google Patents

A kind of pylon oil pumper Download PDF

Info

Publication number
CN204691739U
CN204691739U CN201520380594.3U CN201520380594U CN204691739U CN 204691739 U CN204691739 U CN 204691739U CN 201520380594 U CN201520380594 U CN 201520380594U CN 204691739 U CN204691739 U CN 204691739U
Authority
CN
China
Prior art keywords
counterweight
pylon
brake
propeller shaft
front propeller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520380594.3U
Other languages
Chinese (zh)
Inventor
牛泽浩
王琴彦
梅云
杨楠
梅振红
殷刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HENAN NANYANG OILFIELD MACHINE MANUFACTURE CO Ltd
Original Assignee
HENAN NANYANG OILFIELD MACHINE MANUFACTURE CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HENAN NANYANG OILFIELD MACHINE MANUFACTURE CO Ltd filed Critical HENAN NANYANG OILFIELD MACHINE MANUFACTURE CO Ltd
Priority to CN201520380594.3U priority Critical patent/CN204691739U/en
Application granted granted Critical
Publication of CN204691739U publication Critical patent/CN204691739U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model provides a kind of pylon oil pumper, comprise pylon, on pylon, guiding movement is equipped with counterweight along the vertical direction, the upper end of pylon is provided with the reel be in transmission connection with driving mechanism, reel is taken the flexible drive parts being wound with one end and being connected with counterweight, counterweight is provided with for coordinating with the brake gear braked counterweight with pylon, and pylon is provided with the brake touch device starting brake gear when the movement velocity of counterweight exceedes setting movement velocity.Oil pumper of the present utility model connects polished rod eye and counterweight by driving-belt, the gravity of counterweight directly acts on polished rod eye completely, the balanced action that can play is maximum, by the load regulating the weight of counterweight farthest can reduce driving mechanism, counterweight is provided with brake gear, brake touch device, detecting that the movement velocity of counterweight starts brake gear when exceeding setting movement velocity, so also can ensure that counterweight can not be fallen and cause the accident, ensure that the safety of work.

Description

A kind of pylon oil pumper
Technical field
the utility model relates to oil-pumping equipment in oil field, especially a kind of pylon oil pumper.
Background technology
Along with the progressively development of oil-gas mining engineering, oil-pumping equipment in oil field obtains to be applied more and more widely, is constantly carrying out structure improvement and performance boost simultaneously.Existing belt pylon oil pumper, due to its compact conformation, takes up room little, and functional performance is good and be widely used.
Authorization Notice No. is that the Chinese invention patent of CN100975045A discloses a kind of two belt roller formula oil pumper, the pedestal of this oil pumper is provided with the pylon of setting, the top of pylon is provided with drive motors and reel, drive motors and reel are in transmission connection, reel is taken and is wound with suspending weight belt, the two ends of suspending weight belt are suspended in the both sides of reel respectively, and the one end being positioned at pylon is connected with counterweight, the one end be positioned at outside pylon connects polished rod eye, during drive motors driving spool turns, suspending weight belt drives polished rod eye to move up and down by the frictional force between reel, counterweight moves up and down under the pulling of suspending weight belt, in order to the sucker rod preventing mechanical breakdown or connect on polished rod eye takes off bar, setting movement velocity when fracture etc. causes well head to lose to carry counterweight free falling to cause the movement velocity of counterweight to be greater than normal work, fall to smashing equipment or staff, balance belt is also connected with between counterweight and reel, balance belt is positioned at the inner side of suspending weight belt, the side of reel is also provided with the brake for brake drum, when the movement velocity of counterweight is greater than setting movement velocity, carrying out braking by brake to reel can make counterweight brake, and then avoid counterweight to fall causing the accident, this oil pumper by connecting balance belt and braking counterweight to reel braking between counterweight and reel, although avoid the problem that counterweight is fallen, but in use because counterweight is not connected with polished rod eye by means of only suspending weight belt, also be connected with reel by balance belt, the moiety by weight of counterweight is for balancing the sucker rod that polished rod eye connects, all the other weight of counterweight are then born by the drive motors of reel and driving spool turns, because the moiety by weight of counterweight is shared by reel, like this in order to realize the complete equipilibrium to sucker rod, that just counterweight must be done is very large, weight ratio is heavier, in addition because drive motors also will bear the moiety by weight of counterweight, cause the power demand of drive motors larger, while increasing drive motors acquisition cost, also the Energy in use of product can be increased.
Utility model content
The purpose of this utility model is to provide a kind of pylon oil pumper, causes balance weight large and the problem that product energy consumption is high to solve in prior art because the moiety by weight of counterweight is born by reel.
Pylon oil pumper of the present utility model adopts following technical scheme: a kind of pylon oil pumper, comprise pylon, on pylon, guiding movement is equipped with counterweight along the vertical direction, the upper end of described pylon is provided with the reel be in transmission connection with driving mechanism, described reel is taken the flexible drive parts being wound with one end and being connected with counterweight, described counterweight is provided with for coordinating with the brake gear braked counterweight with pylon, and described pylon is provided with the brake touch device starting brake gear when the movement velocity of counterweight exceedes setting movement velocity.
Described brake gear comprises the front propeller shaft that pivot center extends in left-right direction, front propeller shaft is connected with front brake assembly, front propeller shaft has and rotates forward the front propeller shaft braking counterweight to make described front brake assembly coordinate with pylon and rotate forward working position and to reverse working position with the front propeller shaft making front brake assembly and pylon depart from reversing, brake gear also comprises and is in elastic component before reversion working position for applying elastic acting force to described front propeller shaft to make front propeller shaft, before described brake touch device and described front propeller shaft drive front propeller shaft to overcome when being in transmission connection to exceed set movement velocity in the movement velocity of counterweight elastic component elastic acting force and turn to rotating forward working position by the working position that reverses.
Described brake gear also comprises the inter-axle shaft be arranged in parallel with front propeller shaft, inter-axle shaft is connected with rear braking assembly, inter-axle shaft has reversion to brake counterweight inter-axle shaft to make described rear braking assembly coordinate with the pylon working position that reverses and rotates forward working position with rotating forward with the inter-axle shaft making rear braking assembly and pylon depart from, front propeller shaft is provided with front propeller shaft connecting lever, inter-axle shaft is provided with inter-axle shaft connecting lever, between forward and backward power transmission shaft connecting lever, is connected with kinematic link.
Described pylon comprises pylon body, pylon body has the guide rail for coordinating with counterweight guiding movement, counterweight is provided with for described guide rail pass along the vertical direction wear groove, front brake assembly comprises the fork that is fixedly arranged on front propeller shaft and is arranged at guide rail and wears the brake voussoir between groove respective side cell wall, and fork is in transmission connection to drive the voussoir that brakes to move up and guide rail described in wedging when front propeller shaft rotates forward with brake voussoir.
Described guide rail is flexible guide rail.
Front propeller shaft is installed with the linking arm extended along front propeller shaft radial direction, brake touch device comprises moving member moving up and down, linking arm is connected with moving member and drives moving member synchronizing moving, the moving member arrestment mechanism for braking moving member when the movement velocity that brake touch device is also included in moving member is greater than setting movement velocity.
Described moving member string is located at and is positioned on the annular wire rope of perpendicular, the upper end of annular wire rope is around on upper block, the lower end of annular wire rope is around on lower tumbler, and described moving member arrestment mechanism is made up of the centrifugal brake be arranged in upper block and/or lower tumbler.
Pylon oil pumper of the present utility model connects polished rod eye and counterweight by driving-belt, the gravity of counterweight can directly act on polished rod eye completely, the balanced action that can play is maximum, by the load regulating the weight of counterweight farthest can reduce driving mechanism, simultaneously, counterweight is provided with the brake gear coordinating with pylon and brake it, brake touch device is startup brake gear when detecting that the movement velocity of counterweight exceedes setting movement velocity, so also can ensure that counterweight can not be fallen to cause the accident, ensure that the safety of work.
Further, the front propeller shaft of brake gear is connected with front brake assembly, front elastic component provides elastic acting force to be in front propeller shaft reversion working position to make front propeller shaft to front propeller shaft, now counterweight can move up and down with flexible drive parts, before when the movement velocity of counterweight exceedes setting movement velocity, brake touch device drives front propeller shaft to overcome, the elastic acting force of elastic component rotates forward and brakes counterweight, thisly transfer by front propeller shaft positive and negative the braking realizing brake gear and the mode loosened is directly effective, during use, security reliability is higher.
Further, brake gear also comprises inter-axle shaft, inter-axle shaft is connected with rear braking assembly, is braked by the both sides, front and back of forward and backward brake assemblies to counterweight, ensures the stationarity of brake process, improves skidding effect.
Further, the front propeller shaft of front brake assembly is fixed with fork, fork is connected with the voussoir be folded between guide rail and counterweight, front propeller shaft rotates forward and can upwards pull voussoir to make counterweight and guide rail wedging, because the wedging direction of voussoir is just contrary with the direction of motion of counterweight, therefore counterweight more moves down relative to voussoir, and the frictional force that voussoir is supplied to counterweight is larger, and braking effect is very good.
Further, adopt flexible guide rail to reduce the noise of counterweight in the process of moving up and down, the structure that flexible guide rail is also is simple, compact, reduces manufacturing cost.
Further, brake touch device is included in the moving member be synchronized with the movement with counterweight under the drive of the linking arm on front propeller shaft, brake touch device is braked moving member by moving member arrestment mechanism when the movement velocity of moving member is greater than setting movement velocity, moving member is slack will drive front propeller shaft to rotate forward by linking arm, thus shake-up brake gear brakes, moving member like this by being synchronized with the movement with counterweight controls to brake, in counterweight once generation velocity jump, moving member will be braked and touch brake under the braking of moving member arrestment mechanism, be swift in response, fast, and there are not malfunctioning other Problem of Failure such as grade.
Further, moving member is the annular wire rope be located in perpendicular, wire rope is respectively around on upper and lower guide wheel, one in upper and lower guide wheel is provided with centrifugal brake, centrifugal brake can carry out locking when guide wheel velocity of rotation is greater than setting movement velocity to wire rope, thus realizes the braking to moving member, does not need to arrange speed measuring device separately, easy to use, to the precise control of speed.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of pylon oil pumper embodiment of the present utility model;
Fig. 2 is the lateral view at pylon oil pumping unit brake touch device place in Fig. 1;
Fig. 3 is the schematic perspective view of the syndeton of left side brake connecting rod in Fig. 2;
Fig. 4 is the structural representation of pylon oil pumper front brake assembly in Fig. 1.
Detailed description of the invention
The embodiment of a kind of pylon oil pumper of the present utility model: as Figure 1-3, comprise pedestal 1, pedestal 1 is provided with the pylon 2 of setting, be provided with reel 3 and drive motors 4 before and after the top of pylon 2 side by side, reel and drive motors are in transmission connection by transmission mechanism, reel are wound with flexible drive parts 5, in the present embodiment, flexible drive parts is driving belt, and in other embodiments, flexible drive parts can be wire rope etc.One end that flexible drive parts 5 extends perpendicularly to pylon inside is connected with counterweight 6, the one end dropped on outside pylon is connected with the polished rod eye 50 for connecting with pumping rod, counterweight and polished rod eye are held the two ends of driving-belt respectively and are pressed on reel by driving-belt, substantially increase the frictional force between reel and driving-belt, drive motors 4 forward or reverse is also with movable reel to rotate, reel rotates and pulls counterweight and polished rod eye to move up and down respectively by the frictional force between driving-belt, wherein the motion of counterweight and polished rod eye is contrary, when polished rod eye rises, counterweight declines, when polished rod eye declines, counterweight rises, counterweight is provided with the brake gear coordinating with pylon and brake counterweight, wherein brake gear is controlled by the touch device that brakes, when the movement velocity of counterweight exceedes setting movement velocity, the startup of brake touch device shake-up brake gear is braked to counterweight, fall to avoid counterweight and injure equipment by a crashing object or staff causes operating irregularity.
Pylon comprises pylon body, and pylon body interior is provided with left and right relative spacing and is provided with guide rail 8, and in the present embodiment, guide rail 8 is flexible guide rail, is wire rope guide rail, certainly, in other embodiments, also can be guide peg, or the rigid guideway of other rectangles.The left and right sides corresponding directive wheel 7 be provided with for coordinating with guide rail 8 respectively of counterweight, counterweight be provided with for guide rail 8 pass at above-below direction wear groove, counterweight moves up and down under the guide effect of guide rail, pylon is also provided with the brake gear for braking counterweight, brake gear comprises the front propeller shaft 94 that pivot center extends in left-right direction and the front brake assembly 9 be connected on front propeller shaft, front propeller shaft has and rotates forward the front propeller shaft braking counterweight to make front brake assembly coordinate with guide rail and rotate forward working position and to reverse working position with the front propeller shaft making front brake assembly and pylon depart from reversing, front brake assembly 9 comprises the fork 941 that is fixed on front propeller shaft and is located at the brake voussoir worn between groove and guide rail 8, brake voussoir comprises movable wedge 900 and the fixing voussoir 901 that is fixed on shoe sole and fixed friction block 902, shoe sole is fixedly connected with counterweight, fork 941 is connected with bracket arm 9410 through the resigning hole 9000 on shoe sole and is in transmission connection by bracket arm 9410 and movable wedge, front propeller shaft 94 is also provided with for applying elastic acting force to front propeller shaft 94 with elastic component 944 before making front propeller shaft 94 in normal operation arbitrarily can not rotate, the existence of front elastic component 944 ensure that front propeller shaft can not easily just then fork 941 is rotated and pulls movable wedge wedging counterweight and guide rail, affect moving up and down of counterweight, brake gear also comprises the inter-axle shaft be arranged in parallel with front propeller shaft, the inter-axle shaft rearward position of being located at counterweight corresponding with front propeller shaft, inter-axle shaft is connected with rear braking assembly accordingly, the structure of rear braking assembly is identical with the structure of front brake assembly, position is symmetrical, accordingly, inter-axle shaft has reversion to brake counterweight inter-axle shaft to make rear braking assembly coordinate with the guide rail working position that reverses and rotates forward working position with rotating forward with the inter-axle shaft making rear braking assembly and guide rail depart from, be not described in detail as its concrete structure herein, wherein, before, inter-axle shaft is respectively equipped with driving front connecting lever and rear transmission crank arm, before, be in transmission connection by kinematic link 942 between rear transmission crank arm, be in transmission connection when front propeller shaft rotates forward 942 drive inter-axle shaft reversions, contrary, when front propeller shaft reverses, kinematic link 942 drives inter-axle shaft to rotate forward, that is, when front brake assembly carries out skidding to counterweight, rear braking assembly carries out skidding to counterweight simultaneously, brake touch device comprises the upper block 93 and lower tumbler 90 of being located at the upper and lower two ends of pylon body respectively, upper block 93 and lower tumbler 90 are wound with annular wire rope 91, annular wire rope is fixedly connected with upper block and energy synchronous axial system, annular wire rope 91 is provided with moving member 92, moving member 92 is fixedly connected on front propeller shaft 94 by linking arm 940, brake touch device also comprises the moving member arrestment mechanism for braking moving member 92, in the present embodiment, moving member arrestment mechanism is be located at the centrifugal brake on upper block 93, centrifugal brake comprises the brake block together rotated with speed limited wheel and the lock groove being located at speed limited wheel wheel week, when the rotary speed of speed limited wheel is greater than setting speed, brake block can be centrifuged whipping and be subjected to displacement in radial direction and enter lock groove thus by speed limited wheel locking, this limiter of speed is prior art, no longer its concrete structure is described in detail herein.
Pylon oil pumper of the present utility model to the braking principle of counterweight is: in normal operation, counterweight moves up and down, brake gear on it also together moves with it, front propeller shaft 94 pulls annular wire rope 91 to be together synchronized with the movement up and down with it by linking arm 940, elastic acting force due to front elastic component is greater than the frictional force that annular wire rope motion needs overcome, therefore, front propeller shaft can not rotate and be in reversion working position, when the sucker rod that polished rod eye connects takes off bar or fracture and causes well head to lose to carry, counterweight free falling, speed becomes rapidly large within the extremely short time, now, front propeller shaft drives annular wire rope also to move down fast by linking arm 940, the speed of annular wire rope also increases fast, upper block 93 is also with annular wire rope quick rotation, increase to exceed setting movement velocity time, centrifugal brake on upper block 93 plays braking action and carries out locking braking to upper block, around the annular wire rope on upper block also stop motion thereupon, relative displacement is there is between moving member on such annular wire rope and counterweight, the Action of Gravity Field of counterweight makes front propeller shaft rotate forward with the elastic acting force of elastic component before making the linking arm 940 that moving member connects overcome easily on moving member, front propeller shaft occurs to rotate forward and the fork on front propeller shaft is rotated together and drives the movable wedge of front brake assembly to move up wedging guide rail and counterweight, frictional force between guide rail and counterweight plays braking action to counterweight, same, the rotation of front propeller shaft also can drive inter-axle shaft to rotate by kinematic link 942, before, rear transmission component can be braked counterweight simultaneously, braking effect is better.
Guide wheel 90 in the present embodiment rotates and is assemblied on dwang, one end of dwang is hinged on pylon, the other end hangs with balancing weight, the gravity of balancing weight ensure that can fluctuate with the flexible of rope in one end of dwang, when the rope be wrapped on guide wheel 90 can be made like this to expand with heat and contract with cold changing with ambient temperature, moment is in tensioned state, is also convenient to when adjusting rope lengths, is convenient to install.
The embodiment two of pylon oil pumper of the present utility model: be with the difference of embodiment one, brake gear in counterweight can be the expansion link of both sides stretching, extension to the left and right, the outer end of expansion link is used for rubbing with the sidewall of pylon, or the friction plate that can arrange on sidewall thereof specially for expansion link outer end friction fit, thus the braking realized counterweight, brake touch device can be automatically controlled speed measuring device, detect that the speed of counterweight sends the signal of telecommunication to brake gear when exceeding setting movement velocity at automatically controlled speed measuring device, the expansion link of driving brake device is protruding.
The embodiment three of pylon oil pumper of the present utility model: be with the difference of embodiment one, the brake gear in counterweight only can only include front propeller shaft and front brake assembly, does not arrange inter-axle shaft and rear braking assembly at the rear side of counterweight.
The embodiment four of pylon oil pumper of the present utility model: be with the difference of embodiment one, front brake assembly can for being directly arranged in the brake block of fork front end, corresponding pylon body is provided with brake block to the breaker slot coordinated, when front propeller shaft rotates forward, brake block on fork can move away from counterweight and stretch in the breaker slot on pylon body, thus realize the braking of counterweight with pylon body block, now just do not need front brake assembly to coordinate with guide rail yet.
The embodiment five of pylon oil pumper of the present utility model: be with the difference of embodiment one, moving member brake structure can be located on lower tumbler, or upper and lower guide wheel is all arranged, better to the braking effect of moving member like this, or moving member arrestment mechanism can for being located at the brake for the wheel Zhou Jinhang friction catch to guide wheel of upper block and/or lower tumbler side.
The embodiment six of pylon oil pumper of the present utility model: be with the difference of embodiment one, brake touch device can adopt electric control gear, electric control gear is by electricly connecting with the front propeller shaft of brake gear, detect that the movement velocity of counterweight is rotated forward by the front propeller shaft of signal of telecommunication control brake gear thus braked counterweight after being greater than setting movement velocity by detection system, or brake touch device adopts velometer, velometer and the moving member arrestment mechanism control connection that can detect upper block or lower tumbler rotating speed.
Pylon oil pumper of the present utility model is by the change of counterweight and moving member motion state and direct mechanical transmission pulls brake gear, braking rapidly precisely, effectively can realize the braking of counterweight, the gravity of counterweight by driving-belt completely, directly act on polished rod eye, the weight of accurate control counterweight farthest can reduce the load of driving mechanism, reduce energy consumption, improve the application life of whole oil pumper.

Claims (7)

1. a pylon oil pumper, comprise pylon, on pylon, guiding movement is equipped with counterweight along the vertical direction, the upper end of described pylon is provided with the reel be in transmission connection with driving mechanism, described reel is taken the flexible drive parts being wound with one end and being connected with counterweight, it is characterized in that, described counterweight is provided with for coordinating with the brake gear braked counterweight with pylon, and described pylon is provided with the brake touch device starting brake gear when the movement velocity of counterweight exceedes setting movement velocity.
2. pylon oil pumper according to claim 1, it is characterized in that, described brake gear comprises the front propeller shaft that pivot center extends in left-right direction, front propeller shaft is connected with front brake assembly, front propeller shaft has and rotates forward the front propeller shaft braking counterweight to make described front brake assembly coordinate with pylon and rotate forward working position and to reverse working position with the front propeller shaft making front brake assembly and pylon depart from reversing, brake gear also comprises and is in elastic component before reversion working position for applying elastic acting force to described front propeller shaft to make front propeller shaft, before described brake touch device and described front propeller shaft drive front propeller shaft to overcome when being in transmission connection to exceed set movement velocity in the movement velocity of counterweight elastic component elastic acting force and turn to rotating forward working position by the working position that reverses.
3. pylon oil pumper according to claim 2, it is characterized in that, described brake gear also comprises the inter-axle shaft be arranged in parallel with front propeller shaft, inter-axle shaft is connected with rear braking assembly, inter-axle shaft has reversion to brake counterweight inter-axle shaft to make described rear braking assembly coordinate with the pylon working position that reverses and rotates forward working position with rotating forward with the inter-axle shaft making rear braking assembly and pylon depart from, front propeller shaft is provided with front propeller shaft connecting lever, inter-axle shaft is provided with inter-axle shaft connecting lever, between forward and backward power transmission shaft connecting lever, is connected with kinematic link.
4. pylon oil pumper according to claim 2, it is characterized in that, described pylon comprises pylon body, pylon body has the guide rail for coordinating with counterweight guiding movement, counterweight is provided with for described guide rail pass along the vertical direction wear groove, front brake assembly comprises the fork that is fixedly arranged on front propeller shaft and is arranged at guide rail and wears the brake voussoir between groove respective side cell wall, and fork is in transmission connection to drive the voussoir that brakes to move up and guide rail described in wedging when front propeller shaft rotates forward with brake voussoir.
5. pylon oil pumper according to claim 4, is characterized in that, described guide rail is flexible guide rail.
6. the pylon oil pumper according to claim 2-5 any one, it is characterized in that, front propeller shaft is installed with the linking arm extended along front propeller shaft radial direction, brake touch device comprises moving member moving up and down, linking arm is connected with moving member and drives moving member synchronizing moving, the moving member arrestment mechanism for braking moving member when the movement velocity that brake touch device is also included in moving member is greater than setting movement velocity.
7. pylon oil pumper according to claim 6, it is characterized in that: described moving member string is located at and is positioned on the annular wire rope of perpendicular, the upper end of annular wire rope is around on upper block, the lower end of annular wire rope is around on lower tumbler, and described moving member arrestment mechanism is made up of the centrifugal brake be arranged in upper block and/or lower tumbler.
CN201520380594.3U 2015-06-05 2015-06-05 A kind of pylon oil pumper Expired - Fee Related CN204691739U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520380594.3U CN204691739U (en) 2015-06-05 2015-06-05 A kind of pylon oil pumper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520380594.3U CN204691739U (en) 2015-06-05 2015-06-05 A kind of pylon oil pumper

Publications (1)

Publication Number Publication Date
CN204691739U true CN204691739U (en) 2015-10-07

Family

ID=54232042

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520380594.3U Expired - Fee Related CN204691739U (en) 2015-06-05 2015-06-05 A kind of pylon oil pumper

Country Status (1)

Country Link
CN (1) CN204691739U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114178855A (en) * 2021-11-29 2022-03-15 济南二机床集团有限公司 Anti-falling brake mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114178855A (en) * 2021-11-29 2022-03-15 济南二机床集团有限公司 Anti-falling brake mechanism

Similar Documents

Publication Publication Date Title
CN104682309A (en) Suspended high-voltage line deicing device
CN204691739U (en) A kind of pylon oil pumper
CN100581971C (en) Wireless speed limiting system of elevator
CN110155895A (en) A kind of rescue winch that can be translated certainly with the self-shield of card cabin
CN103663205B (en) Arm tower crane
CN102182776B (en) Full-automatic reverse rotation preventing brake device for screw
CN105752790B (en) A kind of elevator governor
CN202146528U (en) Fire hazard and earthquake escape curtain box
CN101871338A (en) Direct drive pumping unit
CN102418501B (en) Indirectly driven traction type pumping unit
CN204941468U (en) A kind of efficient direct-drive oil extractor
CN105435381A (en) Automatic-control constant-speed descending device
CN108853765A (en) A kind of novel escape descending lifeline
CN101810914A (en) Automatic velocity feedback type high-rise escaping device
CN105019866B (en) A kind of efficient direct-drive oil extractor with single action pulley and single fixed pulley
CN201159157Y (en) Loop chain type double-weight counterbalance oil pumping machine
CN204873325U (en) Speed limiter
CN201696006U (en) Directly driven beam pumping unit
CN201738886U (en) Long-stroke dual-well tower type oil sucking machine
CN202300128U (en) Synchronous connecting shaft
CN102102438B (en) Anti-tipping device for construction lifting platform
CN202673256U (en) One-machine double-extraction lifting device for cluster well
CN204941470U (en) A kind of efficient direct-drive oil extractor with single action pulley and single fixed pulley
CN204941469U (en) A kind of belt deceleration and the high-efficiency pumping unit with single movable pulley
CN201738889U (en) Long-stroke belt tower type oil pumping unit

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151007

Termination date: 20170605

CF01 Termination of patent right due to non-payment of annual fee