Falling protection device for high-place operation of beam-pumping unit

Abstract

The utility model relates to the technical field of high-place operation protection devices, in particular to a falling protection device for high-place operation of a beam-pumping unit. The beam-pumping unit high-place operation falling protection device comprises a falling protection device and two stand columns, the two stand columns are symmetrically arranged at the upper end of a pumping unit walking beam, the falling protection device comprises a connecting steel cable, an energy buffer, a tensioner assembly and two four-claw steel cable clamping heads, and the connecting steel cable is arranged between the four-claw steel cable clamping heads. A speed difference safety belt is arranged on the connecting steel cable, and the energy buffer is arranged at the left end and the tensioner is arranged at the right end. The device is installed on the pumping unit walking beam through the two stand columns, the safety belt tying height is increased, the safety guarantee of workers is greatly improved, part of impact energy can be absorbed when falling occurs through the energy buffer and the speed difference safety belt, the impact force on the human body is reduced, and the safety of the workers is improved. The tensioning degree of the connecting steel cable can be conveniently adjusted through the tensioner assembly, and the purpose of improving the safety of workers during high-place operation of the oil pumping unit is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high place operation protection device technical field especially relates to a beam -pumping unit high place operation falling protection device. BACKGROUND

[0002] The beam -pumping unit is a common petroleum exploitation equipment, and its height is generally between 3-6 meters, so that the maintenance and overhaul of the beam -pumping unit often involve high place operation, which brings potential safety risk to the operator. In order to ensure the personal safety of the operator, the oil field must take effective safety protection measures when carrying out the high place operation of the beam -pumping unit.

[0003] In order to protect the personal safety of the operator, the oil field requires that effective safety protection measures must be taken when carrying out the high place operation. At present, the commonly used anti-falling protection measures include:

[0004] 1. Lifting truck: the operator is lifted to the operation height by using the lifting truck, so that the safety protection of the personnel during operation can be realized. However, the use of the lifting truck is limited by resource allocation and ground conditions of the operation site. In the case of narrow ground, collapse or resource shortage, the lifting truck cannot be used.

[0005] 2. Safety belt: the operator hangs the safety belt, and connects one end of the safety belt to the lifting ring or simple hanging device of the beam -pumping unit. Although this method is simple, there are certain safety hazards. First, the hanging device of the safety belt is usually welded at the fixed position on the beam, and the height is about 120mm, which does not meet the safety requirement of "high hanging and low use". Secondly, the fixed and welded hanging device limits the moving range of the operator, and cannot meet the demand of moving at any position on the beam, and when engaging in the related operation of the horse head, the operator cannot hang the safety belt, which increases the falling risk. SUMMARY

[0006] (I) Technical problem to be solved

[0007] The utility model provides a beam -pumping unit high place operation falling protection device to overcome the problem that there is no special anti-falling device when carrying out the high place operation of the beam -pumping unit in the prior art.

[0008] (II) Technical scheme

[0009] In order to achieve the above-mentioned purpose, the utility model provides a beam -pumping unit high place operation falling protection device, which comprises: a falling protection device and two columns;

[0010] The two columns are symmetrically arranged on the upper end of the beam -pumping unit, and the two columns comprise: a first column and a second column, and the first column is arranged on the left end of the second column.

[0011] The first upright column top end is provided with a connecting arm to the right side outer edge, the second upright column top end is provided with a connecting arm to the left side outer edge, and a falling protection device is arranged between the two upright columns;

[0012] The falling protection device comprises a connecting cable, an energy buffer, a tensioner assembly, and two four-jaw cable clamps, the falling protection device right end is provided with a connecting fork, the connecting fork connects the second upright column, the falling protection device left end is provided with an energy buffer, and the energy buffer is sleeved on the connecting arm of the outer edge;

[0013] The two four-jaw cable clamps comprise a first four-jaw cable clamp and a second four-jaw cable clamp, the energy buffer right end is provided with a cable viewer and the first four-jaw cable clamp, the cable viewer is arranged at the left end of the first four-jaw cable clamp, the first four-jaw cable clamp is symmetrically provided with the second four-jaw cable clamp, the second four-jaw cable clamp right end is provided with a tightening observer, and the connecting cable is arranged between the first four-jaw cable clamp and the second four-jaw cable clamp, and a speed difference safety belt is sleeved on the connecting cable;

[0014] The tightening observer is sleeved on the left side outer wall of the tensioner assembly, the right side of the tightening observer is provided with a tightening nut, the tightening nut is provided with an observation hole, and the right end of the tensioner assembly is fixedly connected with the connecting fork.

[0015] Preferably, two adjusting screws are further included, and the two adjusting screws are respectively arranged transversely on the two upright columns.

[0016] Preferably, the upright column is composed of two parts, and the upright column comprises a fixed column and an adjusting column, the adjusting column is arranged in the fixed column, the fixed column and the adjusting column are fixedly connected through the adjusting screw, the bottom end of the fixed column is provided with a rectangular fixed base, the rectangular fixed base is connected with the pumping unit beam through a plurality of bolts, and the top end of the bolt is provided with an upright column positioning nut.

[0017] Preferably, the connecting fork is sleeved on the connecting arm of the second upright column to the left side outer edge, and a loosening pad is arranged between the connecting fork and the connecting arm of the second upright column.

[0018] Preferably, a connecting fork pin is further included, and the connecting fork pin penetrates the connecting arm of the connecting fork and the second upright column.

[0019] Preferably, a connecting pin is further included, and the connecting pin penetrates the two side outer walls of the energy buffer and the connecting arm of the first upright column, and the energy buffer and the first upright column are fixedly connected.

[0020] Preferably, the tensioner assembly comprises a tensioner housing, which is a hollow cylindrical structure, two symmetrical observation windows are arranged on the outer wall of the tensioner housing, a tensioner right side tensioning screw rod and a tensioner left side tensioning screw rod are respectively arranged in the tensioner housing, the tensioner right side tensioning screw rod and the tensioner left side tensioning screw rod are in threaded connection with the tensioner housing, and a limiting pin is arranged on the tensioner right side tensioning screw rod and the tensioner left side tensioning screw rod respectively.

[0021] A left-hand tightening limiting nut is sleeved on the outer wall of the tensioner left side tensioning screw rod, and a right-hand tightening limiting nut is sleeved on the outer wall of the tensioner right side tensioning screw rod.

[0022] The right end of the tensioner right side tensioning screw rod is embedded in a connecting fork, two connecting fork limiting nuts are sleeved on the outer wall of the tensioner right side tensioning screw rod, and the two connecting fork limiting nuts are fixedly connected with the connecting fork and the right side tensioning screw rod.

[0023] Preferably, a gasket is arranged between the two connecting fork limiting nuts and the connecting fork.

[0024] Preferably, the energy buffer comprises a buffer housing, which is a hollow cylindrical structure, a buffer mandrel penetrating through the buffer housing is arranged at the center of the buffer housing, a buffer spring is arranged on the outer wall of the buffer mandrel, and limiting gaskets are arranged on both sides of the buffer spring.

[0025] A buffer limiting nut is arranged at the right end of the buffer housing, the buffer limiting nut is sleeved on the buffer mandrel, a connecting arm extending to the right side is arranged at the left end of the buffer mandrel, the buffer mandrel and the connecting arm are fixedly connected through an anti-coming-off pin, spring limiting nuts and friction plates are respectively arranged on the left side of the buffer mandrel, and the friction plates are arranged at the right end of the spring limiting nuts.

[0026] Preferably, a steel cable observer is arranged on the outer wall of the buffer mandrel, and the steel cable observer and the first four-jaw steel cable clamp are integrated.

[0027] (Three) beneficial effects

[0028] The utility model provides a beam -pumping unit high -altitude operation falling protection device, the traditional safety belt system hangs the device usually fixed in the lower position, cannot satisfy " high hang low use " safety requirement, this beam -pumping unit high -altitude operation falling protection device installs the device on the beam -pumping unit through two stand, and the safety belt system hangs height can improve to 500 to 1000mm satisfies " high hang low use " requirement to greatly improve the worker's security guarantee, through using energy buffer, energy buffer can absorb part impact energy and reduce the impact on the human body and improve safety when falling, through using the speed difference safety belt can reduce the falling speed and falling distance and reduce the harm to the human body when the worker falls, through the tensioner subassembly can conveniently adjust the tension of steel cable, ensure the applicability and flexibility of the device under different working conditions, through using four jaw steel cable clamp firmly holds the steel cable, prevents the steel cable from sliding or falling off and ensures the reliability of connection, the beam -pumping unit high -altitude operation falling protection device adopts the whole mechanical structure form, and the reliability is high without electronic element power supply and application stability influence, ensures the stable operation of the device under various severe environments, reduces the security risk caused by electronic element failure, thereby reaches the purpose that improves the safety of worker when operating in high place. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The utility model discloses a beam -pumping unit high -altitude operation falling protection device structure schematic diagram shows,

[0030] Figure 2 The utility model discloses a beam -pumping unit high -altitude operation falling protection device structure schematic diagram shows, Figure 1 The utility model discloses a beam -pumping unit high -altitude operation falling protection device structure schematic diagram shows,

[0031] Wherein: 1: beam -pumping unit beam ; 2: adjusting screw ; 3: stand ; 4: connecting fork pin ; 5: lock washer ; 6: connecting fork ; 7: connecting fork limiting nut ; 8: gasket ; 9: tensioner right side tensioning lead screw ; 10: right screw limiting nut ; 11: tensioner shell ; 12: limiting pin ; 13: tensioner left side tensioning lead screw ; 14: left screw limiting nut ; 15: observation hole ; 16: screw nut ; 17: screw observer ; 18: four jaw steel cable clamp ; 19: connecting steel cable ; 20: speed difference safety belt ; 21: steel cable observer ; 22: buffer limiting nut ; 23: limiting washer ; 24: buffer shell ; 25: buffer spring ; 26: friction plate ; 27: spring limiting nut ; 28: buffer mandrel ; 29: anti -drop pin ; 30: connecting pin ; 31: stand positioning nut. DETAILED DESCRIPTION

[0032] The utility model will be specifically explained as follows in combination with the drawings and examples.

[0033] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by "upper", "lower", "left", "right", "inner", "outer", "top", "bottom" and the like are all based on the orientation or positional relationship shown in the drawings, and the target is only to facilitate the description of the utility model and simplify the description, and is not intended to indicate or imply that the indicated components must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0034] As shown in Figures 1-2 The utility model provides a beam -pumping unit high -altitude operation falling protection device, include: falling protection device with two stand 3,

[0035] The two stands 3 are symmetrically arranged on the upper end of the beam -pumping unit beam 1, and the two stands 3 include a first stand and a second stand, the first stand is arranged at the left end of the second stand, an adjusting screw 2 is arranged transversely on the stand 3 to enable the stand to be adjusted in height, the stand 3 is composed of two parts, and the stand 3 includes a fixed column and an adjusting column, the adjusting column is embedded in the fixed column and is fixedly connected by adjusting screws, by rotating the adjusting screw 2, the overall height of the stand can be changed to adapt to the requirements of different working heights, and the bottom end of the fixed column is provided with a rectangular fixed base, the rectangular fixed base is connected with the beam -pumping unit beam 1 by a plurality of bolts, and the top end of the bolt is provided with a stand positioning nut 31, further enhancing the stability of the stand 3.

[0036] The top end of the first stand is provided with a connecting arm extending to the right side, and the top end of the second stand is provided with a connecting arm extending to the left side, and the two stands 3 are provided with a falling protection device therebetween, and the falling protection device includes a connecting steel cable 19, an energy buffer, a tensioner assembly and two four-jaw steel cable clamps 18.

[0037] The right end of the falling protection device is provided with a connecting fork 6 connected with the second stand, the connecting fork 6 is sleeved on the connecting arm extending to the left side of the second stand, to ensure the stability and firmness of the device, in order to further enhance the reliability of the connection, the connecting fork 6 and the connecting arm of the second stand are provided with an anti-loosening washer 5 therebetween, the anti-loosening washer 5 enables the connecting fork 6 not to loosen even under long-time use or vibration environment, and the connecting fork 6 and the connecting arm of the second stand are connected by a connecting fork pin 4, to ensure that the whole device will not fall off or shift when subjected to external force.

[0038] The left end of the falling protection device is provided with an energy buffer, the energy buffer is sleeved on the connecting arm of the outer edge, the energy buffer is connected with the connecting arm of the first column through a connecting pin 30, the connecting pin 30 penetrates through the two side outer walls of the energy buffer and the connecting arm of the first column, and the energy buffer is firmly fixed on the first column, so that the energy buffer cannot be separated when being impacted, and the impact force generated during falling can be effectively absorbed and relieved, thereby protecting the safety of the operator.

[0039] The energy buffer is an important part of the falling protection device, and mainly plays a role in reducing the falling speed and impact force when the operator falls by accident, so as to prevent the operator from being seriously injured. The energy buffer comprises a buffer shell 24, which is a hollow cylindrical structure, and a buffer mandrel 28 penetrating through the buffer shell 24 is arranged at the center of the buffer shell 24. An elastic buffer spring 25 is arranged on the outer wall of the buffer mandrel 28, and limit washers 23 are arranged on both sides of the elastic buffer spring 25 to prevent the elastic buffer spring 25 from being displaced or separated during operation.

[0040] The right end of the buffer shell 24 is provided with a buffer limiting nut 22, which is sleeved on the buffer mandrel 28 and plays a role in fixing and limiting the buffer shell 24. The left end of the buffer mandrel 28 is connected with the connecting arm of the first column, and the buffer mandrel 28 is fixedly connected with the connecting arm through an anti-separation pin 29 to prevent the buffer mandrel 28 from being separated when being impacted. The left side of the buffer mandrel 28 is respectively provided with a spring limiting nut 27 and a friction plate 26, and the friction plate 26 is arranged at the right end of the spring limiting nut 27. The tensile resistance of the friction plate 26 is 12KN. When the operator falls by accident, the friction plate 26 is bent and deformed under the tension of 12KN and moves in the direction of the force to realize the first-stage buffering by friction with the inner wall of the buffer shell 24. The limit washers 23 arranged on the left side of the elastic buffer spring 25 are compressed under the pressure to realize the second-stage buffering. The energy buffer can slow down the falling speed and reduce the impact force by the deformation of the elastic buffer spring and the friction of the friction plate, thereby protecting the operator from being seriously injured.

[0041] The left end of the connecting fork 6 is provided with a tensioner assembly for adjusting and maintaining the proper tension of the connecting steel cable to ensure the stability and reliability of the whole device. The tensioner assembly comprises a tensioner shell 11, which is a hollow cylindrical structure, and two symmetrical observation windows are arranged on the outer wall of the tensioner shell 11. A tensioner right-side tensioning lead screw 9 and a tensioner left-side tensioning lead screw 13 are respectively arranged in the tensioner shell 11 and are threadedly connected with the tensioner shell 11. Limit pins 12 are respectively arranged on the tensioner right-side tensioning lead screw 9 and the tensioner left-side tensioning lead screw 13.

[0042] The left side of the tensioner is provided with a left screw limiting nut 14, and the right side of the tensioner is provided with a right screw limiting nut 10. The left screw limiting nut 14 and the right screw limiting nut 10 are used to control the axial displacement of the left side tensioning screw 13 and the right side tensioning screw 9, so as to realize the fine adjustment of the tension of the connecting cable 19. The right end of the right side tensioning screw 9 is embedded in the connecting fork 6. The outer wall of the right side tensioning screw 9 is provided with two connecting fork limiting nuts 7. The two limiting nuts 7 are used to fix the connecting fork 6 and the right side tensioning screw 9, so as to ensure that they will not be loose or fall off during use. The two connecting fork limiting nuts 7 and the connecting fork 6 are provided with a gasket 8.

[0043] The two four-jaw cable clamps 18 include a first four-jaw cable clamp and a second four-jaw cable clamp. The two four-jaw cable clamps 18 are symmetrically arranged. The four-jaw cable clamp 18 provides a larger contact area and a stronger gripping force, so it is very suitable for use in high-load and dynamic environments. The right end of the energy buffer is provided with a cable observer 21 and a first four-jaw cable clamp. The cable observer 21 is arranged at the left end of the first four-jaw cable clamp. The cable observer 21 is provided with an outer wall of a buffer mandrel 28. The cable observer 21 is threadedly connected with the first four-jaw cable clamp. The cable observer 21 is threadedly connected with the buffer mandrel 28. The cable observer 21 is used to lock the first four-jaw cable clamp and transmit the force of the connecting cable 19 to the buffer mandrel 28. The outer wall of the cable observer 21 is provided with a through hole, through which the position of the connecting cable 19 in the cable observer 21 can be observed.

[0044] The first four-jaw cable clamp is symmetrically provided with a second four-jaw cable clamp. The right end of the second four-jaw cable clamp is provided with a tightening observer 17. The connecting cable 19 is arranged between the first four-jaw cable clamp and the second four-jaw cable clamp. The connecting cable 19 is provided with a speed difference safety belt 20. The tightening observer 17 is arranged on the outer wall of the left side tensioning screw 13. The second four-jaw cable clamp can be locked through the tightening observer 17. The right side of the tightening observer 17 is provided with a tightening nut 16. The tightening observer 17 is connected with the left side tensioning screw 13 through the tightening nut 16. The tightening nut 16 is provided with an observation hole 15.

[0045] The actual working scene of the overhead operation falling protection device of the beam-type pumping unit will be described in detail below.

[0046] The falling protection device for high-altitude operation of the beam-pumping unit can be installed on the beam 1 of the beam-pumping unit by selecting a connecting steel cable 19 of different specifications and lengths according to different types of the beam-pumping unit before on-site operation, and the length of the connecting steel cable 19 can be adjusted by rotating the tensioner housing 11, when the connecting steel cable 19 is elongated and relaxed due to long-time stress, the right-hand threaded limiting nut 10 and the left-hand threaded limiting nut 14 are loosened, the tensioner housing 11 is rotated, the right-side tensioning screw rod 9 and the left-side tensioning screw rod 13 of the tensioner are axially moved, and the connecting steel cable 19 is tensioned;

[0047] When a person suddenly falls, the connecting steel cable 19 is pulled, the force is transmitted to the buffer mandrel 28 through the steel cable observer 21, when the pressure reaches 12KN, the friction plate 26 is bent and deformed to move in the stress direction and rub against the inner wall of the buffer housing 24 to realize first-stage buffering, and the limiting gasket 23 is compressed to compress the buffer spring 27 to realize second-stage buffering.

[0048] It can be understood that the above-mentioned various embodiments of the utility model can be combined with each other to form combined embodiments without violating the principle logic, and the utility model will not be described in detail due to the limited length.

[0049] Those skilled in the art can understand that the writing order of the steps in the above-mentioned method of the specific embodiment does not mean a strict execution order and does not constitute any limitation on the implementation process, and the specific execution order of the steps should be determined according to its function and possible internal logic.

[0050] The falling protection device for high-altitude operation of the beam-pumping unit provided by the utility model is installed on the beam of the beam-pumping unit through two columns 3, the height of the safety belt can be increased to 500-1000mm to meet the requirement of "high hanging and low use", thereby greatly improving the safety guarantee of workers, the energy buffer can absorb part of impact energy to reduce the impact force on the human body and improve safety when falling occurs, the speed difference safety belt 20 can slow down the falling speed of workers and reduce the harm to the human body when workers fall, the tensioner assembly can conveniently adjust the tension of the steel cable to ensure the applicability and flexibility of the device under different working conditions, the four-jaw steel cable clamp 18 firmly holds the steel cable to prevent the steel cable from sliding or falling off and ensure the reliability of the connection, the falling protection device for high-altitude operation of the beam-pumping unit adopts a full mechanical structure form, has no electronic elements for power supply and application stability, is high in reliability, ensures stable operation of the device under various harsh environments, reduces the safety hazards caused by faults of electronic elements, and thereby achieves the purpose of improving the safety of workers during high-altitude operation.

[0051] The above has described various embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements in the technology in the market, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A fall protection device for overhead work on a beam-type pumping unit, characterized in that, Include: Fall protection device and two columns (3); The two columns (3) are symmetrically arranged on the upper end of the pumping unit walking beam (1), and the two columns (3) comprise: a first column and a second column, the first column is arranged on the left end of the second column; The top end of the first column is provided with a connecting arm outward to the right side, the top end of the second column is provided with a connecting arm outward to the left side, and a fall protection device is arranged between the two columns (3); The fall protection device comprises: a connecting cable (19), an energy buffer, a tensioner assembly and two four-jaw cable clamps (18), the right end of the fall protection device is provided with a connecting fork (6), the connecting fork (6) is connected with the second column, the left end of the fall protection device is provided with an energy buffer, and the energy buffer is sleeved on the connecting arm outward; The two four-jaw cable clamps (18) comprise: a first four-jaw cable clamp and a second four-jaw cable clamp, the right end of the energy buffer is provided with a cable observer (21) and the first four-jaw cable clamp, the cable observer (21) is arranged on the left end of the first four-jaw cable clamp, the first four-jaw cable clamp is symmetrically provided with the second four-jaw cable clamp, the right end of the second four-jaw cable clamp is provided with a tightening observer (17), and the connecting cable (19) is arranged between the first four-jaw cable clamp and the second four-jaw cable clamp, and the connecting cable (19) is sleeved with a speed difference safety belt (20); The tightening observer (17) is sleeved on the left side outer wall of the tensioner assembly, the right side of the tightening observer (17) is provided with a tightening nut (16), the tightening nut (16) is provided with an observation hole (15), and the right end of the tensioner assembly is fixedly connected with the connecting fork (6).

2. The beam-pumping unit fall-protection device according to claim 1, characterised in that It also includes two adjusting screws (2), which are arranged transversely on the two columns (3) respectively.

3. The beam-pumping unit overhead work platform fall protection apparatus according to claim 2, characterised in that, The column (3) is composed of two parts, and the column (3) comprises: a fixed column and an adjusting column, the adjusting column is arranged in the fixed column, and the fixed column and the adjusting column are fixedly connected through the adjusting screw (2), the bottom end of the fixed column is provided with a rectangular fixed base, the rectangular fixed base is connected with the pumping unit walking beam (1) through a plurality of bolts, and the top end of the bolt is provided with a column positioning nut (31).

4. The beam-pumping unit overhead work platform fall protection apparatus as claimed in claim 1, characterised in that, The connecting fork (6) is sleeved on the connecting arm outward to the left side of the second column, and the connecting fork (6) and the connecting arm of the second column are provided with an anti-loosening washer (5).

5. The beam-pumping unit overhead work platform fall protection apparatus according to claim 4, characterized in that, It also includes a connecting fork pin (4), which penetrates the connecting arm of the second column and the connecting fork (6).

6. The beam-pumping unit overhead work platform fall protection apparatus according to claim 4, characterized in that, It also includes a connecting pin (30), which passes through the outer walls on both sides of the energy buffer and the connecting arm of the first column, and fixedly connects the energy buffer and the first column.

7. The beam-pumping unit overhead work platform fall-protection device according to claim 1, characterised in that, The tensioner assembly comprises a tensioner housing (11), which is a hollow cylindrical structure, two symmetrical observation windows are arranged on the outer wall of the tensioner housing (11), a tensioner right side tensioning screw rod (9) and a tensioner left side tensioning screw rod (13) are respectively arranged in the tensioner housing (11), the tensioner right side tensioning screw rod (9) and the tensioner left side tensioning screw rod (13) are in threaded connection with the tensioner housing (11), and a limiting pin (12) is arranged on each of the tensioner right side tensioning screw rod (9) and the tensioner left side tensioning screw rod (13); A left screw limiting nut (14) is sleeved on the outer wall of the tensioner left side tensioning screw rod (13), and a right screw limiting nut (10) is sleeved on the outer wall of the tensioner right side tensioning screw rod (9); The tensioner right side tensioning screw rod (9) is embedded into a connecting fork (6) at the right end, two connecting fork limiting nuts (7) are sleeved on the outer wall of the tensioner right side tensioning screw rod (9), and the two connecting fork limiting nuts (7) are fixedly connected with the connecting fork (6) and the right side tensioning screw rod (9).

8. The beam-pumping unit overhead work platform fall protection apparatus according to claim 7, characterized in that, A gasket (8) is arranged between the two connecting fork limiting nuts (7) and the connecting fork (6).

9. The beam-pumping unit overhead work platform fall-protection device according to claim 1, characterised in that, The energy buffer comprises a buffer housing (24), which is a hollow cylindrical structure, a buffer arbor (28) penetrating through the buffer housing (24) is arranged at the center of the buffer housing (24), a buffer spring (25) is arranged on the outer wall of the buffer arbor (28), and limiting gaskets (23) are arranged on both sides of the buffer spring (25); A buffer limiting nut (22) is arranged at the right end of the buffer housing (24), the buffer limiting nut (22) is sleeved on the buffer arbor (28), a connecting arm extending to the right side is arranged at the left end of the buffer arbor (28), the buffer arbor (28) and the connecting arm are fixedly connected through an anti-coming-off pin (29), spring limiting nuts (27) and friction plates (26) are respectively arranged on the left side of the buffer arbor (28), and the friction plates (26) are arranged at the right end of the spring limiting nuts (27).

10. The beam-pumping unit overhead work platform fall protection apparatus according to claim 9, characterized in that, A steel cable observer (21) is arranged on the outer wall of the buffer arbor (28), and the steel cable observer (21) is integrated with the first four-jaw steel cable clamp.

Images