CN203855337U - Safety protection device for operation of tower crane suspension arm - Google Patents
Safety protection device for operation of tower crane suspension arm Download PDFInfo
- Publication number
- CN203855337U CN203855337U CN201420303225.XU CN201420303225U CN203855337U CN 203855337 U CN203855337 U CN 203855337U CN 201420303225 U CN201420303225 U CN 201420303225U CN 203855337 U CN203855337 U CN 203855337U
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- CN
- China
- Prior art keywords
- steel plate
- wire rope
- steel wire
- suspension arm
- eye bolt
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- 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 - Lifetime
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- 239000000725 suspension Substances 0.000 title abstract 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 82
- 239000010959 steel Substances 0.000 claims abstract description 82
- 238000007689 inspection Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000037396 body weight Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model discloses a safety protection device for operation of tower crane suspension arm. The device comprises a steel wire rope arranged on the suspension arm in the longitudinal direction, and a steel wire rope supporting device fixed on the suspension arm for connecting the two ends of the steel wire rope, wherein the steel wire rope supporting device comprises supporting steel plates and ring-head bolts; a connecting hole is formed in each supporting steel plate; the ring-head bolts are fixed in the connecting holes; the end parts of the steel wire rope are fixed on the ring heads of the ring-head bolts. According to the device, when a worker inspects along the suspension arm, a fixing buckle of a safety belt which the worker wears is buckled with the steel wire rope, so that the safety belt can synchronously move along the steel wire rope when the worker climbs along the suspension arm, accordingly, inconvenience cannot be brought for the inspection of the worker, and the convenience of operation and the working efficiency are improved; besides, the steel wire rope and the safety belt are matched to protect the safety operation of the worker, so that falling accidents can be avoided.
Description
Technical field
The utility model relates to a kind of tower crane equipment, particularly a kind of tower machine arm job safety fender guard.
Background technology
Tower crane in operation and maintenance process, operating personnel must from the root of arm start along arm patrol and examine to arm foremost, could thoroughly find and process the potential safety hazard existing on tower type crane boom.Under normal circumstances, staff patrols and examines operation along arm has two kinds of modes to complete: the one, on the dolly of taking on tower type crane boom, install with hanging basket, and operating personnel stands in hanging basket and has moved and patrolled and examined with dolly; The 2nd, staff has creeped and has patrolled and examined operation along arm.
In real work, all there is potential safety hazard in these two kinds of methods, in first method, because dolly exists discontinuity equalization, dolly with hanging basket easily damage and come off, in actual job, also have the hanging basket case leading to a disaster that comes off; Second method is because operating personnel's safety strap cannot be fixed, if fixed safety strap, operating personnel is very inconvenient in the time of operation, therefore generally all do not use of seat belts in actual job, potential safety hazard is very large, also has the case under arm gets rid of in the time of operation.
Utility model content
In view of this; the purpose of this utility model is to provide a kind of tower machine arm job safety fender guard, to solve the existing problem that is moved and patrol and examine by creeping along arm the high and operation inconvenience of job safety hidden danger that operation exists by dolly hanging basket along arm.
The utility model tower machine arm job safety fender guard; the wire-rope supporting device being connected with steel rope two ends on comprising the steel rope longitudinally arranged along arm and being fixed on arm; described wire-rope supporting device comprises supporting steel plate and eye bolt; on described supporting steel plate, be provided with connecting bore; described eye bolt is fixed in connecting bore, and the end of described steel rope is fixed on the eye of eye bolt.
Further, the steel rope that described steel rope is tensile strength>=140mpa, the area of section>=21mm of described steel rope
2; Described eye bolt is the eye bolt of tensile strength>=170MPa, the area of section>=9mm of described eye bolt
2; Described supporting steel plate is the steel plate of tensile strength>=100mpa, and described supporting steel plate is at the cross-sectional area>=15cm of connecting bore portion
2.
Further, described supporting steel plate is welded on arm, and the width of described supporting steel plate is 100～120mm, and the thickness of described supporting steel plate is 4～6mm.
The beneficial effects of the utility model: the utility model tower machine arm job safety fender guard; in the time that staff patrols and examines along arm; the clip of safety strap that staff wears snaps onto on steel rope; staff's safety strap in the time creeping along arm can move along steel rope simultaneously; can not bring inconvenience to staff's the work of patrolling and examining; can improve operation comfort feature and work efficiency, steel rope and safety strap cooperation simultaneously can ensure staff's safe operation, avoids occurring falling accident.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model tower machine arm job safety fender guard.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in the figure, the present embodiment tower machine arm job safety fender guard, the wire-rope supporting device being connected with steel rope 2 two ends on comprising the steel rope 2 longitudinally arranged along arm 1 and being fixed on arm 1, described wire-rope supporting device comprises supporting steel plate 3 and eye bolt 4, on described supporting steel plate 3, be provided with connecting bore, described eye bolt 4 is fixed in connecting bore, and the end of described steel rope 2 is fixed on the eye of eye bolt 4; In concrete enforcement, steel rope 2 can be fixed on eye bolt 4 by steel cable clamp of the prior art.
The present embodiment tower machine arm job safety fender guard; in the time that staff patrols and examines along arm; the clip of safety strap that staff wears snaps onto on steel rope; staff's safety strap in the time creeping along arm can move along steel rope simultaneously; can not bring inconvenience to staff's the work of patrolling and examining; can improve operation comfort feature and work efficiency, steel rope and safety strap cooperation simultaneously can ensure staff's safe operation, avoids occurring falling accident.
In the present embodiment, described steel rope 2 is the steel rope of tensile strength 140mpa, and the tensile strength of steel rope 2 can be selected according to GB/T20118-2006, and the area of section of described steel rope 2 is 21mm
2; The eye bolt that described eye bolt 4 is 170MPa for tensile strength, the tensile strength of eye bolt 4 can according to " mechanical design handbook ", (China Machine Press publishes, the 5th edition the 1st volume, ISBN:9787111292258) to select, the area of section of described eye bolt 4 is 9mm
2; The steel plate that described supporting steel plate 3 tensile strengths are 100mpa, the tensile strength of supporting steel plate 3 can according to " mechanical design handbook ", (China Machine Press publishes, the 5th edition the 1st volume, ISBN:9787111292258) select, described supporting steel plate 3 is 15cm at the cross-sectional area of connecting bore portion
2.
Under normal circumstances, staff's body weight can not exceed 100kg, and the present embodiment tower machine arm job safety fender guard can meet the operation of patrolling and examining of the operating personnel safety of body weight in 100kg, and this conclusion can be verified by following principle of design:
Suppose staff's body weight m=100kg, the operating safety factor of tower machine arm job safety fender guard is taken as 1.5 simultaneously.
Static weight W=mg=100 × 9.8=980N that steel rope 2 bears, the quality that m is staff, g is acceleration due to gravity;
In the time that staff falls, live load W1=ma=100 × 9.8=980N that steel rope 2 bears, acceleration/accel when a is staff's free fall, a=g;
Staff is in the time of free falling so, the total pulling force P=W+W1=1960N that steel rope bears;
And the specified pulling force P1=Rm1*A1=140mpa*21mm that steel rope 2 in the present embodiment can bear
2=2940N (Rm1 is the tensile strength of steel rope 2, and A1 is the cross-sectional area of steel rope 2); P1=1.5*P, therefore the specified pulling force of steel rope 2 has reached 1.5 times of actual institute bearing tension, and therefore it can bear staff's free fall of 100kg and can not rupture.
In the time of staff's free falling, the pulling force P2=P/2=980N that eye bolt 4 bears, and the specified pulling force P3=Rm2*A2=170mpa*9mm that eye bolt 4 can bear
2=1530N (Rm2 is the tensile strength of eye bolt 4, and A2 is the cross-sectional area of eye bolt 4); P3 > 1.5*P2, therefore the specified pulling force of eye bolt 4 has exceeded 1.5 times of actual institute bearing tension, and therefore it can bear staff's free fall of 100kg and can not rupture.
In the time of staff's free falling, the pulling force P4=P/2=980N bearing described in supporting steel plate 3, and the pulling force P5=Rm3*A3=100mpa*15mm that supporting steel plate 3 can bear
2=1500N (Rm3 is the tensile strength of supporting steel plate 3, and A3 is the smallest cross-section area of supporting steel plate 3 in connecting bore portion); P5 > 1.5*P4, therefore the specified pulling force of supporting steel plate 3 has exceeded 1.5 times of actual institute bearing tension, and therefore it can bear staff's free fall of 100kg and can not rupture.
Known by above-mentioned the result; static weight and live load when steel rope 2, eye bolt 4 and supporting steel plate 3 all can sustain body weight and be the staff's free fall in 100kg, therefore the present embodiment tower machine arm job safety fender guard operational security is high.
As the improvement to this enforcement; the supporting steel plate 3 of this tower machine arm job safety fender guard is welded on arm 1; the width of described supporting steel plate 3 is 120mm; the thickness of described supporting steel plate is 4mm; certainly in concrete enforcement; the width of described supporting steel plate 3 also can be other value within the scope of 100～120mm, and the thickness of described supporting steel plate also can be other value within the scope of 4～6mm.Meeting A3=15mm
2situation under, the thickness of supporting steel plate 3 is chosen in the weldability energy that can ensure steel plate within the scope of 4～6mm, and the width of supporting steel plate 3 is within the scope of 100～120mm, can ensure that supporting steel plate has enough weld strengths.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (3)
1. a tower machine arm job safety fender guard; it is characterized in that: the wire-rope supporting device being connected with steel rope two ends on comprising the steel rope longitudinally arranged along arm and being fixed on arm; described wire-rope supporting device comprises supporting steel plate and eye bolt; on described supporting steel plate, be provided with connecting bore; described eye bolt is fixed in connecting bore, and the end of described steel rope is fixed on the eye of eye bolt.
2. tower machine arm job safety fender guard according to claim 1, is characterized in that: the steel rope that described steel rope is tensile strength>=140mpa, the area of section>=21mm of described steel rope
2; Described eye bolt is the eye bolt of tensile strength>=170MPa, the area of section>=9mm of described eye bolt
2; Described supporting steel plate is the steel plate of tensile strength>=100mpa, and described supporting steel plate is at the cross-sectional area>=15cm of connecting bore portion
2.
3. tower machine arm job safety fender guard according to claim 2, is characterized in that: described supporting steel plate is welded on arm, and the width of described supporting steel plate is 100～120mm, and the thickness of described supporting steel plate is 4～6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420303225.XU CN203855337U (en) | 2014-06-09 | 2014-06-09 | Safety protection device for operation of tower crane suspension arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420303225.XU CN203855337U (en) | 2014-06-09 | 2014-06-09 | Safety protection device for operation of tower crane suspension arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203855337U true CN203855337U (en) | 2014-10-01 |
Family
ID=51605205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420303225.XU Expired - Lifetime CN203855337U (en) | 2014-06-09 | 2014-06-09 | Safety protection device for operation of tower crane suspension arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203855337U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107096148A (en) * | 2017-04-06 | 2017-08-29 | 中国十七冶集团有限公司 | It is a kind of be used on crane arm the Combined anti-dropping of operation fall protection device |
-
2014
- 2014-06-09 CN CN201420303225.XU patent/CN203855337U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107096148A (en) * | 2017-04-06 | 2017-08-29 | 中国十七冶集团有限公司 | It is a kind of be used on crane arm the Combined anti-dropping of operation fall protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141001 |