CN106321755B - Installation equipment of pumping unit belt - Google Patents
Installation equipment of pumping unit belt Download PDFInfo
- Publication number
- CN106321755B CN106321755B CN201510385843.2A CN201510385843A CN106321755B CN 106321755 B CN106321755 B CN 106321755B CN 201510385843 A CN201510385843 A CN 201510385843A CN 106321755 B CN106321755 B CN 106321755B
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- gear
- installation equipment
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- cylinder
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- 238000005086 pumping Methods 0.000 title claims abstract description 63
- 238000009434 installation Methods 0.000 title claims abstract description 44
- 239000002184 metal Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/24—Equipment for mounting belts, ropes, or chains
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses an installation device for a belt of an oil pumping unit, and belongs to the field of chemical machinery. The equipment comprises a sleeve, a rotating shaft, a bearing, a gear, a bracket, a gear retainer and a pin. Through holes are arranged above the two side arms of the bracket; the supporting column is a cylinder with adjustable length; the rotating shaft penetrates through the through hole and is in contact with the bearing, two ends of the rotating shaft are fixedly connected with the sleeve and the gear, the rotating shaft and the sleeve can rotate coaxially and in the same direction. The sleeve comprises a connecting body connected with the rotating shaft and a hollow cylinder body used for being sleeved with a locking nut of the motor belt pulley, and the inner cavity of the hollow cylinder body is of an equilateral hexagonal structure. The gear backstop is positioned below the gear and meshed with the gear. The gear backstop device is provided with a shaft hole in the center, a pin penetrates through the shaft hole and is fixedly connected with the side arm, and the gear backstop device can rotate around the pin. The belt of the oil pumping unit is installed by using the installation equipment provided by the invention, the operation is simple, the time and the labor are saved, and the installation efficiency of the belt of the oil pumping unit is effectively improved.
Description
Technical field
The present invention relates to chemical machinery field, more particularly to the installation equipment of a kind of belt of oil pumping machine.
Background technology
Pumping unit is a kind of oil exploration equipment, so that oil is gone out well by the method for pressurization, has heavy load, Chang Chong
Journey, low jig frequency, it is energy-efficient the advantages that.Pumping unit generally includes power-transmission system, exchange system, balance system, suspension system
System, brake system etc., and power-transmission system includes motor, motor pulley, belt wheel for oil pumping machine and connection motor belt
The belt of wheel and belt wheel for oil pumping machine.However, in the operational process of pumping unit, exposed generated outside since belt is long-term
Abrasion etc. during aging, belt use be easy to cause that belt tension is inconsistent, four points one lines are unqualified or disconnected de- etc. existing
As.It is therefore desirable to aperiodically replaced to belt of oil pumping machine, and by new pumping unit be mounted on motor pulley and
On belt wheel for oil pumping machine.
The following method of prior art generally use installs belt wheel for oil pumping machine：Pumping unit is parked in top dead-centre, tenses dead brake,
The front and back jackscrew for unclamping motor first, then unclamps the fixed screw of motor, and motor is moved forward with crowbar, and removing old belt will
New belt is put into the race of belt of oil pumping machine and the race of motor belt, and moving backward motor with crowbar again makes its reset.
Front and back jackscrew is finally utilized, after so that motor pulley and belt wheel for oil pumping machine is reached four points one lines, then tightens the fixation spiral shell of motor
Silk, you can complete the installation of belt of oil pumping machine.
The inventor finds that the existing technology has at least the following problems：
The prior art needs the front and back jackscrew for unclamping and tightening motor and fixed spiral shell during replacing belt of oil pumping machine
Silk, it is complicated for operation, time-consuming and laborious.
Invention content
Technical problem to be solved of the embodiment of the present invention is, provides a kind of pumping easy to operate and time saving and energy saving
The installation equipment of oil machine belt.Specific technical solution is as follows：
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
The installation equipment of belt of oil pumping machine provided in an embodiment of the present invention is tensed by the way that pumping unit is being parked in top dead-centre
After dead brake, one end of new belt of oil pumping machine is sleeved in the race of motor pulley, and the other end is partially placed at oil pumping
In the race of machine belt pulley.Then by adjusting the length of the installation equipment supported, so that sleeve is socketed in motor belt
On the lock nut of wheel.Then, by gear rotate, drive shaft and sleeve rotation, and then drive motor pulley rotation,
Under the power effect of the rotation, the belt being partially placed in the race of belt wheel for oil pumping machine is quickly sleeved on the pumping completely
In the race of oil machine belt pulley.Simultaneously as being provided with meshed gear backstopping device below gear, can prevent
Gear reversely rotates under the drive of motor pulley, and then the above-mentioned belt being sleeved in the race of belt wheel for oil pumping machine is avoided to slide
Go out the race of the belt wheel for oil pumping machine.As it can be seen that carrying out the peace of belt of oil pumping machine using installation equipment provided in an embodiment of the present invention
Dress avoids the front and back jackscrew and fixed screw for unclamping and tightening motor, easy to operate and time saving and energy saving, effectively increases oil pumping
The installation effectiveness of machine belt.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structural schematic diagram of the installation equipment of belt of oil pumping machine provided in an embodiment of the present invention；
Fig. 2 is the left view of the installation equipment middle sleeve for the belt of oil pumping machine that further embodiment of this invention provides；
Fig. 3 is the structural schematic diagram of the installation equipment middle gear for the belt of oil pumping machine that further embodiment of this invention provides.
Reference numeral indicates respectively：
1 sleeve,
101 connectors,
102 hollow cylinders,
2 shafts,
3 bearings,
31 upper bearing (metal)s,
32 lower bearings,
4 gears,
41 teeth,
42 gear card slots,
43 gear shaft holes,
5 holders,
51 transverse bases,
52 support columns,
521 first cylinders,
522 second cylinders,
53 side arms,
54 through-holes,
6 gear backstopping devices,
7 pins,
8 fixed links,
Jackscrew on 9,
10 times jackscrews,
11 locking members,
12 return springs.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
As shown in Fig. 1, an embodiment of the present invention provides a kind of installation equipment of belt of oil pumping machine, the installation equipment packets
It includes：Sleeve 1, shaft 2, bearing 3, gear 4, holder 5, gear backstopping device 6, pin 7.
Wherein, the holder 5 be u-bracket, including transverse base 51, be arranged below transverse base 51 support column 52,
Two side arms 53 being separately positioned on above two ends of transverse base 51, the top of the two side arms 53 is both provided with through-hole
54.The support column 52 is length-adjustable cylinder.
The bearing 3 is arranged in through-hole 54, and shaft 2 passes through through-hole 54 and contacted with bearing 3 in the through-hole 54, and shaft
2 both ends are fixedly connected with sleeve 1 and gear 4 respectively.Gear 4, shaft 2 and sleeve 1 can coaxially be rotate in same direction.
The sleeve 1 includes connector 101 for connecting shaft 2 and for being socketed in the lock nut of motor pulley
Empty cylinder 102.The connector 101 is fixedly connected with hollow cylinder 102, and the inner cavity of the hollow cylinder 102 is in equilateral hexagon
Structure, referring to Fig. 2.
The gear backstopping device 6 is located at the lower section of gear 4, and is meshed with gear 4；The gear backstopping device 6 it is centrally disposed
There is axis hole, pin 7 passes through the axis hole of the gear backstopping device 6, and is fixedly connected with the side arm 53 close to gear 4 in holder 5, the tooth
Wheel backstopping device 6 can be rotated around pin 7.
It is understood that the gear 4 described in the embodiment of the present invention is the state of the art, it as shown in Fig. 3, should
Gear 4 includes gear card slot 42, the Yi Jishe formed between the multiple teeth 41 being arranged in outer perimeter side walls, adjacent tooth 41
Set the gear shaft holes 43 at 4 center of gear.
The installation equipment of belt of oil pumping machine provided in an embodiment of the present invention is tensed by the way that pumping unit is being parked in top dead-centre
After dead brake, one end of new belt of oil pumping machine is sleeved in the race of motor pulley, and the other end is partially placed at oil pumping
In the race of machine belt pulley.Then by adjusting the length of the installation equipment supported, so that sleeve 1 is socketed in motor belt
On the lock nut of wheel.Then, by gear 4 rotate, drive shaft 2 and sleeve 1 to rotate, and then drive motor belt rotation
It is dynamic, under the power effect of the rotation, quickly the belt being partially placed in the race of belt wheel for oil pumping machine is sleeved on completely
In the race of the belt wheel for oil pumping machine.Simultaneously as being provided with meshed gear backstopping device 6, energy in the lower section of gear 4
It enough prevents gear 4 from being reversely rotated under the drive of motor pulley, and then avoids above-mentioned be sleeved in the race of belt wheel for oil pumping machine
Belt skid off the race of the belt wheel for oil pumping machine.As it can be seen that carrying out pumping unit using installation equipment provided in an embodiment of the present invention
The installation of belt avoids the front and back jackscrew and fixed screw for unclamping and tightening motor, easy to operate and time saving and energy saving, effectively carries
The high installation effectiveness of belt of oil pumping machine.
Specifically, which is cylinder, and mounting hole is provided in the middle part of the cylinder, the Kong Zhi of mounting hole
Diameter is less than cornerwise length between two opposite vertex of 102 inner cavity of hollow cylinder.Further, as shown in Fig. 1,
The installation equipment further includes fixed link 8, upper jackscrew 9 and lower jackscrew 10.Wherein, upper jackscrew 9 and lower jackscrew 10 are separately fixed at peace
It fills on hole opposite upper side wall and lower wall.One end of fixed link 8 is fixedly connected with one end of shaft 2, and fixed link 8 is extend into
In mounting hole, in mounting hole, the upper lateral part and following side opposite with fixed link 8 closely connects respectively for upper jackscrew 9 and lower jackscrew 10
It touches.The embodiment of the present invention by be as above arranged by sleeve 1 and shaft 2 fixation be integrally formed, to enable sleeve 1 with turn
The rotation of axis 2 and rotate.In order to ensure the stability of connection, upper jackscrew 9 and lower jackscrew 10 can be fixed on by welding
On the upper side wall and lower wall of mounting hole.
Preferably, the installation equipment that the embodiment of the present invention is supplied to further includes locking member 11, by the locking member 11, make
Gear 4 is fixed on one end of shaft 2, so that shaft 2 can be driven to rotate together when gear 4 rotates.
Specifically, which is dumbbell shaped locking member, including check lock lever and the locking at the check lock lever both ends is arranged
Head, and check lock lever passes through the gear shaft holes 43 of gear 4, gear 4 to be fixedly connected with shaft 2 by two locking heads.
Gear 4 can be clamped tightly against two lockings by the embodiment of the present invention by the way that locking member 11 to be as above arranged
Head is intermediate, it is made to fix, and one of locking head with shaft 2 then by being fixedly connected, you can realizes gear 4 and shaft 2
It is fixedly connected.Wherein, used locking head can be in square, discoid or other irregular gengon shapes.In order to just
In rotate gear 4, the hexahedron nut structure shape that the locking head outside gear 4 is preferably, so by using spanner
Rotate the locking head, you can band moving gear 4, shaft 2 and sleeve 1 are carried out while being rotate in same direction.
Specifically, in the embodiment of the present invention, support column 52 is length-adjustable cylinder, and the length of the support column 52 is adjustable can
It realizes in several ways, such as passes through screwed connection, threaded connection etc..For example, which includes the first column
Body 521 and the second cylinder 522, the first cylinder 521 are fixedly connected with transverse base 51, and the outside of the first cylinder 521 is provided with
External screw thread；Second cylinder 522 is hollow cylinder, and the interior intracavitary of the hollow cylinder is provided with the external screw thread with the first cylinder 521
Matched internal thread.Realize that the length of the support column 52 can by being threadedly coupled for the first cylinder 521 and the second cylinder 522
It adjusts.
Specifically, the bearing 3 include be arranged 54 upper end of through-hole upper bearing (metal) 3 and the lower bearing in 54 lower end of through-hole is set
3.The opposite side of shaft 2 in through-hole 54 is contacted with upper bearing (metal) 3 and the lower bearing 3 respectively.
The embodiment of the present invention makes position by being oppositely arranged upper bearing (metal) 31 and lower bearing 32 in upper and lower directions in through-hole 54
In the shaft 2 in through-hole 54 specific part be arranged between upper bearing (metal) 31 and lower bearing 32, and with upper bearing (metal) 31 and lower bearing
32 are in close contact, to the power for supporting shaft 2 and offer that shaft 2 is made to rotate by bearing 3.Wherein, upper bearing (metal) 31 is under
The number of bearing 32 can be one or more, for example, upper bearing (metal) 31 in through-hole 54 can be 1,2,3,4,5 or
More, and the lower bearing 32 in the through-hole 54 equally can be 1,2,3,4,5 or more.
Specifically, the gear backstopping device 6 used in the embodiment of the present invention is disk body.And the disk body be provided centrally with it is above-mentioned
The axis hole of gear backstopping device 6, and multiple cards being meshed with the teeth 41 of gear 4 are provided on the excircle side wall of the disk body
Slot.
The embodiment of the present invention by the way that gear backstopping device 6 is as above arranged, so as to when gear 4 rotate to special angle when, the tooth
The teeth 41 of wheel 4 can be fallen into the card slot of gear backstopping device 6, it is understood that be fallen into just for the teeth of gear backstopping device 6
In the gear card slot 42 of gear 4, to avoid gear 4 from reversely rotating in the case where the inertia force of motor pulley drives, cause to pump
Machine belt is slipped from belt wheel for oil pumping machine.
Further, the installation equipment described in the embodiment of the present invention further includes return spring 12, which includes
Spring body and interconnecting piece positioned at spring body both ends, spring body are sleeved on pin 7 and are located at gear backstopping device 6 and close to should
On the body of rod between the side arm 53 of gear backstopping device 6, interconnecting piece is respectively with the right side wall of gear backstopping device 6 and close to gear retaining
The side arm 53 of device 6 is fixedly connected.The embodiment of the present invention is by being as above arranged return spring 12, in order to make 6 He of gear backstopping device
Gear 4 is meshed, and makes 6 timely return of gear backstopping device, to avoid gear 4 reversed in the case where the inertia force of motor pulley drives
Rotation, causes belt of oil pumping machine to be slipped from belt wheel for oil pumping machine.
It can be seen from the above, can by the following method utilize belt of oil pumping machine provided in an embodiment of the present invention install equipment into
The installation of row belt of oil pumping machine, including：Pumping unit is being parked in top dead-centre, after tensing dead stop, by the one of new belt of oil pumping machine
Then the other end of the new belt of oil pumping machine is partially placed at belt of oil pumping machine by end cap in the race of motor pulley
In the race of wheel.The sleeve for installing equipment is socketed on the lock nut of motor pulley, spanner rotation lock is then utilized
Locking head in part to be rotated with moving gear, shaft and sleeve, and then drives motor pulley rotation.In motor pulley
Rotation inertia force under, by belt of oil pumping machine will drive belt wheel for oil pumping machine rotation, to by new belt of oil pumping machine it is complete
It is sleeved in the race of belt wheel for oil pumping machine.As it can be seen that carrying out belt of oil pumping machine using installation equipment provided in an embodiment of the present invention
Installation, operation have many advantages, such as simpler, safe and reliable, stable operation, highly practical and provided in an embodiment of the present invention
Installation equipment is more convenient for manufacturing, and thoroughly overcomes the prior art and replaces the complex for operation step of belt of oil pumping machine, what time-consuming shows
Shape improves the replacement speed of belt of oil pumping machine, avoids back and forth elastic motor jackscrew, base screw and adjusts four points one repeatedly
The operating process of line, especially seriously dismantles difficult screw in outdoor corrosion for a long time, and when operation is time-consuming and laborious, what inconvenience was replaced
Problem.The installation for carrying out belt of oil pumping machine using installation equipment provided in an embodiment of the present invention only needs five minutes, greatly improves
Installation effectiveness, alleviates the labor intensity of labourer, shortens and stop the well time.
The foregoing is merely presently preferred embodiments of the present invention, the protection domain being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (9)
1. a kind of installation equipment of belt of oil pumping machine, including：Sleeve, shaft, bearing, gear, holder, gear backstopping device, pin；
The holder be u-bracket, including transverse base, be arranged below the transverse base support column, be separately positioned on
Two side arms above two ends of the transverse base, two side arms tops are both provided with through-hole；The support column
For length-adjustable cylinder；
The bearing is arranged in the through-hole, and the shaft passes through the through-hole and connect with the bearing in the through-hole
It touches, and the both ends of the shaft are fixedly connected with the sleeve and the gear respectively, the gear, the shaft and the set
Cylinder can coaxially be rotate in same direction；
The sleeve include connector for connecting the shaft and for be socketed motor pulley lock nut it is hollow
Cylinder, the connector are fixedly connected with the hollow cylinder, and the inner cavity of the hollow cylinder is in equilateral hexagon structure；
The gear backstopping device is located at the lower section of the gear, and is meshed with the gear；Gear backstopping device center is set
It is equipped with axis hole, the pin passes through the axis hole of the gear backstopping device, and is fixedly connected with the side arm close to the gear,
The gear backstopping device can be around the pin rotation.
2. installation equipment according to claim 1, which is characterized in that the connector is cylinder, and the cylinder
Middle part be provided with mounting hole, the bore dia of the mounting hole is less than between two opposite vertex of the hollow cylinder inner cavity
Cornerwise length.
3. installation equipment according to claim 2, which is characterized in that the installation equipment further includes fixed link, upper jackscrew
With lower jackscrew, the upper jackscrew and the lower jackscrew are separately fixed on the mounting hole opposite upper side wall and lower wall；
One end of the fixed link is fixedly connected with one end of the shaft, and the fixed link is extend into the mounting hole,
In the mounting hole, opposite with the fixed link upper lateral part and following side are close respectively for the upper jackscrew and the lower jackscrew
Contact.
4. installation equipment according to claim 1, which is characterized in that the installation equipment further includes locking member, passes through institute
Locking member is stated, the gear is fixedly connected with one end of the shaft.
5. installation equipment according to claim 4, which is characterized in that the locking member be dumbbell shaped, including check lock lever and
Two locking heads at the check lock lever both ends are set；
The check lock lever passes through the axis hole of the gear, and the gear is fixed by two locking heads and the shaft to be connected
It connects.
6. installation equipment according to claim 1, which is characterized in that the support column includes the first cylinder and the second column
Body, first cylinder are fixedly connected with the transverse base, and the outside of first cylinder is provided with external screw thread, and described
Two cylinders are hollow cylinder, and the interior intracavitary of the hollow cylinder is provided with the internal thread coordinated with the external screw thread, by described
First cylinder realizes that the length of the support column is adjustable with being threadedly coupled for second cylinder.
7. installation equipment according to claim 1, which is characterized in that the bearing includes being arranged in the through-hole upper end
Upper bearing (metal) and the lower bearing in the through-hole lower end is set, be located at the opposite side of the shaft in the through-hole respectively with
The upper bearing (metal) and lower bearing contact.
8. installation equipment according to claim 1, which is characterized in that the gear backstopping device is disk body, the disk body
It is provided centrally with the axis hole of the gear backstopping device, multiple and gear teeth are set on the excircle side wall of the disk body
The card slot being meshed.
9. installation equipment according to claim 1, which is characterized in that the installation equipment further includes return spring, including
Spring body and interconnecting piece positioned at the spring body both ends, the spring body are sleeved on the pin and are located at the gear
Backstopping device and close to the gear backstopping device the side arm between the body of rod on, the interconnecting piece respectively with the gear retaining
The right side wall of device is fixedly connected with the side arm close to the gear backstopping device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510385843.2A CN106321755B (en) | 2015-06-30 | 2015-06-30 | Installation equipment of pumping unit belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510385843.2A CN106321755B (en) | 2015-06-30 | 2015-06-30 | Installation equipment of pumping unit belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106321755A CN106321755A (en) | 2017-01-11 |
| CN106321755B true CN106321755B (en) | 2018-10-16 |
Family
ID=57727150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510385843.2A Active CN106321755B (en) | 2015-06-30 | 2015-06-30 | Installation equipment of pumping unit belt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106321755B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001323977A (en) * | 2000-05-12 | 2001-11-22 | Yamaha Motor Co Ltd | Belt engaging tool |
| CN102434642A (en) * | 2010-09-24 | 2012-05-02 | 三菱化学工程株式会社 | Mechanism and method for detaching metallic endless belt |
| CN202266647U (en) * | 2011-09-09 | 2012-06-06 | 山东唐口煤业有限公司 | Quick replacement device for small-sized belt |
| CN203363032U (en) * | 2013-07-04 | 2013-12-25 | 大庆恒源利通石油机械设备制造有限公司 | Pumping unit belt safety device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2392711B (en) * | 2002-09-03 | 2004-08-18 | Auto Service Tools Ltd | Holding device |
-
2015
- 2015-06-30 CN CN201510385843.2A patent/CN106321755B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001323977A (en) * | 2000-05-12 | 2001-11-22 | Yamaha Motor Co Ltd | Belt engaging tool |
| CN102434642A (en) * | 2010-09-24 | 2012-05-02 | 三菱化学工程株式会社 | Mechanism and method for detaching metallic endless belt |
| CN202266647U (en) * | 2011-09-09 | 2012-06-06 | 山东唐口煤业有限公司 | Quick replacement device for small-sized belt |
| CN203363032U (en) * | 2013-07-04 | 2013-12-25 | 大庆恒源利通石油机械设备制造有限公司 | Pumping unit belt safety device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106321755A (en) | 2017-01-11 |
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