CN205578556U - Beam -pumping unit arresting gear - Google Patents
Beam -pumping unit arresting gear Download PDFInfo
- Publication number
- CN205578556U CN205578556U CN201620315670.7U CN201620315670U CN205578556U CN 205578556 U CN205578556 U CN 205578556U CN 201620315670 U CN201620315670 U CN 201620315670U CN 205578556 U CN205578556 U CN 205578556U
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- fixed
- brake
- watt
- oil pumper
- clamping handle
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Abstract
The utility model relates to a beam -pumping unit arresting gear, it is including the brake wheel, the tile of stopping outward, go up brake handle, heavy burden mechanism, the velometer, a controller and an actuating mechanism, suit made of baked clay stop outward in the brake wheel outside, the right -hand member of going up brake handle is fixed with cam and articulated with the sliding shaft left end of the tile upper end of stopping outward, it even has heavy burden mechanism to go up brake handle left part below, go up on brake handle left end overlap joint brake handle 's on releasing the actuating mechanism, the signal output part who carries out the measuring velometer to the wheel speed that stops is connected with the signal input part electricity of controller, the instruction output and the actuating mechanism electricity of controller are connected. The utility model has the advantages of reasonable and compact structure, convenient to use, it is gathered the signal and drives mechanical device work through electrical system monitoring beam -pumping unit operational aspect, and mechanical device carries out reliable braking operation through a series of mechanical transmission mechanism and do not with brake wheel cooperation uses the braking effect that realize manual braking and automatically controlled braking each other do not influence through the interior tile of stopping with the watt -minute of stopping outward.
Description
Technical field
This utility model relates to oil pumper technical field of auxiliary equipment, is a kind of oil pumper brake unit.
Background technology
Oil pumper is in use at present, often can be because the reasons such as down-hole holddown, corrosion cause polished rod or sucker rod to break
De-, thus occur suspension point to lose load accident, cause the pumping unit even damage of wellhead equipment, affect manufacturing schedule adversely；And suspension point
After losing the generation of load accident, reductor still high speed rotating, the personal safety to well site staff also results in the biggest safety danger
Evil.Therefore to effectively prevention causes damage and personnel's injury of equipment because suspension point loses load accident, it is necessary to increase a set of automatically controlled
Protection device, to realize safety in production.
Summary of the invention
This utility model provides a kind of oil pumper brake unit, overcomes the deficiency of above-mentioned prior art, and it can be effective
Solve easy generation suspension point mistake load accident present in the use of existing oil pumper, damage oil production equipment, affect manufacturing schedule and danger adversely
The problem that property is high.
The technical solution of the utility model is realized by following measures: a kind of oil pumper brake unit, including stopping
Wheel, fixing seat, stop watt outward, sliding axle, fixed mount, the first back-moving spring, upper clamping handle, heavy burden mechanism, velometer, controller
And actuator, brake wheel is bonded with reductor power input shaft, and fixing seat is fixedly mounted on the reductor on the right side of brake wheel
On cabinet, fixing seat lower end is hinged with watt lower end of stopping outward, and stopping outward watt is sleeved on outside brake wheel, and there is spacing a watt upper end of stopping outward and sets
Having contour horizontal through hole, watt upper end of stopping outward is connected by horizontal through hole and sliding axle, and fixed mount left end is sleeved on sliding axle,
The right-hand member of fixed mount is fixed with fixing seat top, and on the sliding axle of the corresponding fixed mount left end left and right sides, symmetry is set with first again
Position spring, the right-hand member of upper clamping handle is fixed with cam hinged with the left end of sliding axle, and sliding axle right-hand member is provided with external screw thread and leads to
Crossing nut to fix, be connected with heavy burden mechanism below upper clamping handle left part, upper clamping handle left end is overlapped on and can discharge holding of clamping handle
In row mechanism, it is installed with, on the left of fixing seat, the velometer that brake wheel rotating speed can be measured, the signal output of velometer
End electrically connects with the signal input part of controller, and the instruction output end of controller electrically connects with actuator.
Further optimization and/or improvements to above-mentioned utility model technical scheme are presented herein below:
Above-mentioned actuator can include that latch hook, waling stripe, armature and electric magnet, upper clamping handle left end are connected with heavy burden mechanism
And be overlapped on latch hook lower end, hinged with Framework of Pumping Unit in the middle part of latch hook, latch hook upper end is hinged with waling stripe left end, and level is even
Bar right-hand member is hinged with armature, and armature right-hand member is fixed with electric magnet, and electric magnet outer cover is fixed on equipped with bucker, bucker right-hand member
On Framework of Pumping Unit, the signal output part of velometer electrically connects with electric magnet.
Above-mentioned sliding axle right-hand member can be provided with external screw thread and be fixed with nut.
Above-mentioned oil pumper brake unit may also include link and the second back-moving spring, cuts with scissors with link left end in the middle part of latch hook
Connecing, link right-hand member is fixed with Framework of Pumping Unit, and the second back-moving spring left end is fixed with link, the second back-moving spring right-hand member with
Armature is fixed.
Above-mentioned heavy burden mechanism can include the first fixed pulley, the second fixed pulley, suspension rod and counterweight, and the first fixed pulley passes through bearing
Being fixed on the beam pumping unit support below latch hook, it is upper left that the second fixed pulley is fixed on the first fixed pulley by bearing
On beam pumping unit support, downrod lower end is fixed with counterweight, and suspension rod upper end is connected with steel wire rope, and steel wire rope upper end walks around successively
Two fixed pulleys and the first fixed pulley are fixed with upper clamping handle left end.
Above-mentioned outer stop watt and brake rubber block can be set with between brake wheel.
Above-mentioned oil pumper brake unit may also include reductor shaft cover plate and connecting bolt, and fixing seat is solid by connecting bolt
Between reductor shaft cover plate and case of reducer.
Above-mentioned brake wheel periphery can be provided with groove, and velometer is towards groove.
Above-mentioned oil pumper brake unit is stopped in may also include watt, fixed installation in lower clamping handle and parking brake pull bar, brake wheel
When having a spreading can with brake wheel inside push against in stop watt, watt lower end of inside stopping is provided with the cam that can pivot, cam and lower system
Dynamic handle right-hand member is hinged, and lower clamping handle left end is hinged with parking brake pull bar.
Stop in above-mentioned watt and brake rubber block can be set with between brake wheel.
This utility model reasonable and compact in structure, easy to use, it monitors oil pumper ruuning situation by electric-control system, adopts
Collection signal drive mechanism work, machinery carries out reliable brake operating by a series of mechanical transmission mechanisms, comes
Reach satisfactory braking effect.The working order of oil pumper can be monitored in real time, brake in time, it is ensured that the safety of oil pumper
Operating, production efficiency and the personal safety of operator.By interior watt-minute of stopping watt and stop outward, not and brake wheel is with the use of realization
The braking effect that hand brake and electric control braking are independent of each other, both can meet braking needs during normal work, and also meet and send out
Raw suspension point loses electric control braking protective effect during load accident, has feature safe, laborsaving, easy, reliable.
Accompanying drawing explanation
Accompanying drawing 1 is the broken section structural representation of this utility model most preferred embodiment.
Accompanying drawing 2 is the plan structure schematic diagram of actuator in accompanying drawing 1.
Accompanying drawing 3 is structural representation during this utility model electric control braking.
Accompanying drawing 4 is structural representation during this utility model hand brake.
Accompanying drawing 5 is the circuit theory diagrams of the automatically controlled part of this utility model.
Coding in accompanying drawing is respectively as follows: 1 for brake wheel, and 2 is fixing seat, and 3 for stopping outward watt, and 4 is sliding axle, and 5 is fixed mount,
6 is the first back-moving spring, and 7 is upper clamping handle, and 8 is velometer, and 9 is cam, and 10 is latch hook, and 11 is waling stripe, and 12 is armature,
13 is electric magnet, and 14 is bucker, and 15 is link, and 16 is the second back-moving spring, and 17 is the first fixed pulley, and 18 is the second fixed cunning
Wheel, 19 is steel wire rope, and 20 is suspension rod, and 21 is counterweight, and 22 is reductor shaft cover plate, and 23 is connecting bolt, 24 be in stop watt, 25 are
Lower clamping handle, 26 is parking brake pull bar, and 27 is brake rubber block.
Detailed description of the invention
This utility model is not limited by following embodiment, can come with practical situation according to the technical solution of the utility model
Determine specific embodiment.
In this utility model, for the ease of describing, the description of the relative position relation of each parts is all according to description
The Butut mode of accompanying drawing 1 is described, such as: the position relationship of forward and backward, upper and lower, left and right etc. is based on Figure of description 1
Butut direction determine.
Below in conjunction with embodiment and accompanying drawing, this utility model is further described:
As shown in accompanying drawing 1,2, this oil pumper brake unit include brake wheel 1, fixing seat 2, stop watts 3 outward, sliding axle 4, solid
Determine frame the 5, first back-moving spring 6, upper clamping handle 7, heavy burden mechanism, velometer 8, controller and actuator, brake wheel 1 and deceleration
Mechanomotive force power shaft is bonded, and fixing seat 2 is fixedly mounted on the case of reducer on the right side of brake wheel 1, and fixing seat 2 lower end is with outer
Watt 3 lower ends of stopping are hinged, and stopping outward watts 3 is sleeved on outside brake wheel 1, and there is spacing watt 3 upper ends of stopping outward and is provided with contour horizontal through hole,
Watt 3 upper ends of stopping outward are connected by horizontal through hole and sliding axle 4, and fixed mount 5 left end is sleeved on sliding axle 4, the right-hand member of fixed mount 5
Fixing with fixing seat 2 top, on the sliding axle 4 of the corresponding fixed mount 5 left end left and right sides, symmetry is set with the first back-moving spring 6,
The right-hand member of upper clamping handle 7 is fixed with cam 9 hinged with the left end of sliding axle 4, is connected with heavy burden machine below upper clamping handle 7 left part
Structure, upper clamping handle 7 left end is overlapped in the actuator that can discharge clamping handle 7, and being installed with on the left of fixing seat 2 can be to stopping
The velometer 8 that wheel 1 rotating speed measures, the signal output part of velometer 8 electrically connects with the signal input part of controller, controls
The instruction output end of device electrically connects with actuator.As shown in Figure 1, the oil-pump braking device in routine techniques includes brake
Wheel 1, lower clamping handle 25 and parking brake pull bar 26, when being in an emergency when, well site staff manually pulls parking brake pull bar
26, parking brake pull bar 26 drives lower clamping handle 25, lower clamping handle 25 driving brake wheel 1, thus realizes the braking of oil pumper.This dress
Although putting simple in construction, but the requirement to well site staff is higher, needs well site staff to possess rich experience,
Simultaneously need to well site staff is round-the-clock on duty, careless omission easily occurs, there is potential safety hazard.The technology that this utility model provides
Scheme includes electric-control system and machinery two parts, and velometer 8 and controller constitute electric-control system, can directly apply existing
Have technology Counter and the integrated induction apparatus that tests the speed of control module as electric-control system, brake wheel 1, fixing seat 2, stop watts 3 outward,
Sliding axle 4, fixed mount the 5, first back-moving spring 6, upper clamping handle 7, heavy burden mechanism and actuator composition machinery, by electricity
Ore-controlling Role monitoring oil pumper ruuning situation, gathers signal drive mechanism work, and machinery is passed by a series of machineries
Motivation structure carries out reliable brake operating, reaches satisfactory braking effect.The operating feelings of oil pumper can be monitored in real time
Condition, brake in time, it is ensured that the personal safety of the safe handling of oil pumper, production efficiency and operator.
According to actual needs above-mentioned oil pumper brake unit can be made further optimization and/or improvements:
As shown in accompanying drawing 1,2, actuator includes latch hook 10, waling stripe 11, armature 12 and electric magnet 13, upper clamping handle
7 left ends are connected with heavy burden mechanism and are overlapped on latch hook 10 lower end, hinged with Framework of Pumping Unit in the middle part of latch hook 10, latch hook 10 upper end with
Waling stripe 11 left end is hinged, and waling stripe 11 right-hand member is hinged with armature 12, and armature 12 right-hand member is fixed with electric magnet 13, electric magnet
13 outer cover are fixed on Framework of Pumping Unit equipped with bucker 14, bucker 14 right-hand member, the signal output part of velometer 8 and electromagnetism
Ferrum 13 electrically connects.Electric magnet 13 receives adhesive after the close command of controller, and armature 12 drives under the attraction of electric magnet 13
Waling stripe 11 moves right, and waling stripe 11 band moveable lock hook 10 rotates counterclockwise, makes latch hook 10 disengage with upper clamping handle 7, even
Heavy burden mechanism below upper clamping handle 7 left part drives upper clamping handle 7 clockwise oscillation by action of gravity.
As shown in Figure 1, sliding axle 4 right-hand member is provided with external screw thread and is fixed with nut.Can be by regulation sliding axle 4 right-hand member
Stop outside nut position adjustments a watt upper end spacing.
As shown in Figure 2, this oil pumper brake unit also includes link 15 and the second back-moving spring 16, in the middle part of latch hook 10
Hinged with link 15 left end, link 15 right-hand member is fixed with Framework of Pumping Unit, the second back-moving spring 16 left end and link 15
Fixing, the second back-moving spring 16 right-hand member is fixed with armature 12.The setting of the second back-moving spring 16, can be in this utility model success
After braking, traction actuator resets, it is simple to use.
As shown in Figure 1, heavy burden mechanism includes first fixed pulley the 17, second fixed pulley 18, suspension rod 20 and counterweight 21, first
Fixed pulley 17 is fixed on the beam pumping unit support below latch hook 10 by bearing, and the second fixed pulley 18 is fixed by bearing
On the first fixed pulley 17 upper left beam pumping unit support, suspension rod 20 lower end is fixed with counterweight 21, and suspension rod 20 upper end is even
There are steel wire rope 19, steel wire rope 19 upper end to walk around the second fixed pulley 18 successively and the first fixed pulley 17 is fixed with upper clamping handle 7 left end.
As shown in Figure 3, stop outward and watt between 3 and brake wheel 1, be set with brake rubber block 27.Brake rubber block 27 can use the public affairs such as rubber
Know material, play increasing friction force, strengthen the effect of braking effect, and brake wheel 1 can be avoided and watt directly contact with stopping, subtract
Less wear degree, increase the service life.
As shown in Figure 1, this oil pumper brake unit also includes reductor shaft cover plate 22 and connecting bolt 23, fixing seat 2
It is fixed between reductor shaft cover plate 22 and case of reducer by connecting bolt 23.Utilize original reductor shaft cover plate 22 and add
This utility model and case of reducer are fixed by long connecting bolt 23, make this utility model simple in construction, cost-effective and
It is easy to produce and use.
As shown in Figure 1, brake wheel 1 periphery is provided with groove, and velometer 8 is towards groove.Brake wheel 1 neighboring is magnetic
Material or permeability magnetic material, velometer fixing on fixing seat 2 by mistor as sensing element, sensing element and brake wheel
Composition gear velocity sensor, when brake wheel 1 rotates, velometer 8 will export the pulse signal relevant to speed, reach
To the purpose tested the speed.
As shown in Figure 1, this oil pumper brake unit is stopped in also including watts 24, lower clamping handle 25 and parking brake pull bar 26, stops
When being installed with spreading in wheel 1 can with brake wheel 1 inside push against in stop watts 24, watt 24 lower ends of inside stopping are provided with can revolve around axle
The cam 9 turned, cam 9 is hinged with lower clamping handle 25 right-hand member, and lower clamping handle 25 left end is hinged with parking brake pull bar 26.This utility model
It is applicable to reequip in the brake of existing internal expansion type, outside can installing additional on all kinds oil pumper containing lower clamping handle 25 is braked
Brake unit.Arranging of manual internal expansion type brake gear can allow this utility model have the hands mutually independent with electrodynamic braking
Move mode of braking, both can meet braking needs during normal work, also meet electric control braking when there is suspension point mistake load accident
Protective effect, makes work of the present utility model more flexible and convenient.
As shown in Figure 4, inside stop and watt between 24 and brake wheel 1, be set with brake rubber block 27.Above technical characteristic constitutes this
The most preferred embodiment of utility model, it has stronger adaptability and optimal implementation result, can increase and decrease according to actual needs non-must
The technical characteristic wanted, meets the demand of different situations.
The use process of this utility model most preferred embodiment:
Hand brake: as shown in Figure 4, the direction of pulling force F is downward, pulls downward on lower clamping handle 25 by parking brake pull bar 26
Mode brake, parking brake pull bar 26 the most then releases braking.
Electric control braking: as shown in Figure 5, controller is existing known enumerator, and enumerator can the most commercially
Buy and obtain, first the rated speed value of brake wheel 1 is set on enumerator, the pulse signal input that velometer 8 will collect
In enumerator, pulse signal is carried out process and draws real-time tachometer value, then real-time tachometer value and rated speed value by enumerator
Contrast, when real-time tachometer value exceedes rated speed value, after enumerator will close node HJ, node HJ Guan Bi automatically, joint
Point JC obtains electric, and node JC1 and JC2 also closes, and electric magnet 13 obtains electric；The most as shown in Figure 3, armature 12 is at electric magnet 13
Attracting lower drive waling stripe 11 to move right, waling stripe 11 band moveable lock hook 10 rotates counterclockwise and makes latch hook 10 and upper clamping handle
7 disengage, and counterweight 21 drives upper clamping handle 7 clockwise oscillation because of action of gravity by assembly pulley, make outer stopping watts 3 hold brake rubber block 27 tightly
With brake wheel 1, it is achieved braking；Armature 12 is under the effect of the second back-moving spring 16, and band moveable lock hook 10 automatically resets, electric magnet 13
Random disengagement, then manually will carry in counterweight 21, and upper clamping handle 7 can rotate counterclockwise and also automatically be linked in latch hook 10, this practicality
New restoring is to the brake reset state of Fig. 1.
Claims (10)
1. an oil pumper brake unit, it is characterised in that include brake wheel, fixing seat, stop watt outward, sliding axle, fixed mount, the
One back-moving spring, upper clamping handle, heavy burden mechanism, velometer, controller and actuator, brake wheel and reductor power input shaft
Bonded, fixing seat is fixedly mounted on the case of reducer on the right side of brake wheel, and fixing seat lower end is hinged, outward with watt lower end of stopping outward
Stopping and watt be sleeved on outside brake wheel, there is spacing watt upper end of stopping outward and is provided with contour horizontal through hole, and level is passed through in a watt upper end of stopping outward
Through hole and sliding axle connect, and fixed mount left end is sleeved on sliding axle, and the right-hand member of fixed mount is fixed with fixing seat top, corresponding solid
Determine symmetry on the sliding axle of the frame left end left and right sides and be set with the first back-moving spring, the right-hand member of upper clamping handle be fixed with cam and with
The left end of sliding axle is hinged, and sliding axle right-hand member is provided with external screw thread and is fixed by nut, is connected with heavy burden below upper clamping handle left part
Mechanism, upper clamping handle left part is overlapped in the actuator that can discharge clamping handle, and being installed with on the left of fixing seat can be to stopping
The velometer that vehicle wheel rotational speed measures, the signal output part of velometer electrically connects with the signal input part of controller, controller
Instruction output end electrically connect with actuator.
Oil pumper brake unit the most according to claim 1, it is characterised in that actuator include latch hook, waling stripe,
Armature and electric magnet, upper clamping handle left end is connected with heavy burden mechanism and is overlapped on latch hook lower end, in the middle part of latch hook and Framework of Pumping Unit
Hinged, latch hook upper end is hinged with waling stripe left end, and waling stripe right-hand member is hinged with armature, and armature right-hand member is fixed with electric magnet,
Electric magnet outer cover is fixed on Framework of Pumping Unit equipped with bucker, bucker right-hand member, the signal output part of velometer and electromagnetism
Ferroelectricity connects；Or/and, sliding axle right-hand member is provided with external screw thread and is fixed with nut.
Oil pumper brake unit the most according to claim 1 and 2, it is characterised in that oil pumper brake unit also includes connecting
Frame and the second back-moving spring, hinged with link left end in the middle part of latch hook, link right-hand member is fixed with Framework of Pumping Unit, and second resets
Spring left end is fixed with link, and the second back-moving spring right-hand member is fixed with armature.
Oil pumper brake unit the most according to claim 1 and 2, it is characterised in that heavy burden mechanism include the first fixed pulley,
Second fixed pulley, suspension rod and counterweight, the first fixed pulley is fixed on the beam pumping unit support below latch hook by bearing, the
Two fixed pulleys are fixed on the first fixed pulley upper left beam pumping unit support by bearing, and downrod lower end is solid with counterweight
Fixed, suspension rod upper end is connected with steel wire rope, and steel wire rope upper end walks around the second fixed pulley and the first fixed pulley and upper clamping handle left end successively
Fixing；Or/and, stop outward watt and be set with brake rubber block between brake wheel.
Oil pumper brake unit the most according to claim 3, it is characterised in that heavy burden mechanism include the first fixed pulley, second
Fixed pulley, suspension rod and counterweight, the first fixed pulley is fixed on the beam pumping unit support below latch hook by bearing, and second is fixed
Pulley is fixed on the first fixed pulley upper left beam pumping unit support by bearing, and downrod lower end is fixed with counterweight, hangs
Bar upper end is connected with steel wire rope, and steel wire rope upper end is walked around the second fixed pulley and the first fixed pulley successively and fixed with upper clamping handle left end；
Or/and, stop outward watt and be set with brake rubber block between brake wheel.
6. according to the oil pumper brake unit described in claim 1 or 2 or 5, it is characterised in that oil pumper brake unit also includes
Reductor shaft cover plate and connecting bolt, fixing seat is fixed between reductor shaft cover plate and case of reducer by connecting bolt；
Or/and, brake wheel periphery is provided with groove, and velometer is towards groove.
Oil pumper brake unit the most according to claim 3, it is characterised in that oil pumper brake unit also includes reductor
Shaft-cup plate and connecting bolt, fixing seat is fixed between reductor shaft cover plate and case of reducer by connecting bolt；Or/and,
Brake wheel periphery is provided with groove, and velometer is towards groove.
Oil pumper brake unit the most according to claim 4, it is characterised in that oil pumper brake unit also includes reductor
Shaft-cup plate and connecting bolt, fixing seat is fixed between reductor shaft cover plate and case of reducer by connecting bolt；Or/and,
Brake wheel periphery is provided with groove, and velometer is towards groove.
9. according to the oil pumper brake unit described in claim 1 or 2 or 5 or 7 or 8, it is characterised in that oil pumper brake unit
Stop in also including watt, lower clamping handle and parking brake pull bar, can push against inside brake wheel when being installed with spreading in brake wheel
Inside stopping watt, watt lower end of inside stopping is provided with the cam that can pivot, and cam is hinged with lower clamping handle right-hand member, lower clamping handle left end and hands
Pull bar of stopping is hinged；Or/and, inside stop watt and be set with brake rubber block between brake wheel.
Oil pumper brake unit the most according to claim 6, it is characterised in that oil pumper brake unit is stopped in also including
Watt, lower clamping handle and parking brake pull bar, when being installed with spreading in brake wheel can with brake wheel inside push against in stop watt, inside stop
Watt lower end is provided with the cam that can pivot, and cam is hinged with lower clamping handle right-hand member, and lower clamping handle left end is hinged with parking brake pull bar；
Or/and, inside stop watt and be set with brake rubber block between brake wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620315670.7U CN205578556U (en) | 2016-04-15 | 2016-04-15 | Beam -pumping unit arresting gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620315670.7U CN205578556U (en) | 2016-04-15 | 2016-04-15 | Beam -pumping unit arresting gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205578556U true CN205578556U (en) | 2016-09-14 |
Family
ID=56862859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620315670.7U Active CN205578556U (en) | 2016-04-15 | 2016-04-15 | Beam -pumping unit arresting gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205578556U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167354A (en) * | 2017-12-27 | 2018-06-15 | 大庆市天德忠石油科技有限公司 | Brake gear assembly on beam pumping unit |
-
2016
- 2016-04-15 CN CN201620315670.7U patent/CN205578556U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167354A (en) * | 2017-12-27 | 2018-06-15 | 大庆市天德忠石油科技有限公司 | Brake gear assembly on beam pumping unit |
| CN108167354B (en) * | 2017-12-27 | 2018-10-23 | 大庆市天德忠石油科技有限公司 | Brake gear assembly on beam pumping unit |
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