CN202492341U - Descend arm protection system of arm support - Google Patents
Descend arm protection system of arm support Download PDFInfo
- Publication number
- CN202492341U CN202492341U CN 201220057245 CN201220057245U CN202492341U CN 202492341 U CN202492341 U CN 202492341U CN 201220057245 CN201220057245 CN 201220057245 CN 201220057245 U CN201220057245 U CN 201220057245U CN 202492341 U CN202492341 U CN 202492341U
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- CN
- China
- Prior art keywords
- arm
- valve
- underarm
- upper arm
- protection system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Jib Cranes (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The utility model discloses a descend arm protection system of an arm support. A mixing arm type or folding arm type overhead vehicle is provided with an arm support, an approach switch or a traveling switch is arranged under the arm support, a lower arm lifting operation reversing valve and a bidirectional balanced valve are communicated with a lower arm oil cylinder to form a lower arm driving and controlling oil way, and an upper arm lifting operation reversing valve and the bidirectional balanced valve are communicated with an upper arm oil cylinder to form an upper driving and controlling oil way. The descend arm protection system is characterized in that protection systems are provided in the upper and lower arm driving and controlling oil ways, wherein the protection systems has the structures as follows: the lower arm driving and controlling oil way is also provided with a lower arm low pressure relief valve and a two-position two-way electromagnetic reversing valve, and the upper arm driving and controlling oil way is also provided with an upper arm low pressure relief valve. According to the descend arm protection system disclosed by the utility model, the overhead vehicle is safe and reliable when in arm descending, the intuitive judgment of an operator is not depended, an effectively safety protection measure can be supplied for the arm support and a working arm, and the descend arm protection system is particularly suitable for the arm support descend arm protection of an insulation type overhead vehicle.
Description
Technical field
The jib that the utility model the relates to aerial platform arm protection system that falls, the particularly high empty wagons jib of the insulation arm arm control protection that falls belongs to aloft work control field.
Background technology
Along with developing rapidly of market economy, aerial platform has obtained extensive utilization in many fields of China, and the safe handling of aerial platform simultaneously also more and more comes into one's own.Most at present mixing last underarm whereabouts system arm-type or the high empty wagons of folding-jib does not take the actv. safety method; Lean on operator's intuitive judgment whether to fall the position; May occur: 1) the practicable whereabouts that just stops between upper arm and arm support or underarm and the arm support, jib is unstable when causing driving; 2) implement continued retraction oil cylinder between upper arm and arm support or underarm and the arm support; The stressed increasing of upper arm or underarm is torn weld seam, damaged upper arm or underarm, and is especially more unfavorable for the insulation arm of insulation car; In case the impaired meeting of insulation arm directly influences the insulating power of arm, brings potential safety hazard.
It is bright to send out content
The purpose of the utility model provides a kind of jib arm-type or the high empty wagons of folding-jib arm protection system that falls of mixing; Safe and reliable when making high empty wagons fall arm; Do not rely on operator's intuitive judgment; Can the actv. safety precautions be provided to jib, the jib that is particularly useful for the high empty wagons of the insulation arm protection that falls.
The technical scheme of the utility model is following: mix arm-type or the high empty wagons of folding-jib on be provided with arm support, have near switch or travel switch at arm support; Underarm descending operation change-over valve, bidirectional balanced valve are communicated with the underarm oil cylinder, constitute underarm and drive and control oil channel; Upper arm descending operation change-over valve, bidirectional balanced valve are communicated with the upper arm oil cylinder; Constituting upper arm drives and control oil channel; It is characterized in that; In described upper and lower arm driving and control oil channel, be provided with protection system, the structure of this protection system is following: in described underarm driving and control oil channel, also be provided with underarm low pressure relief valve and 2/2-way solenoid directional control valve; In described upper arm driving and control oil channel, also be provided with the upper arm low pressure relief valve.
Concrete connection structure is: upper arm oil cylinder, underarm oil cylinder are respectively by upper arm descending operation change-over valve, the control of underarm descending operation change-over valve; Upper and lower arm and its are cooresponding all to be provided with bidirectional balanced valve between reversing valve operated; The side outlet that underarm descending operation change-over valve links to each other with underarm oil cylinder loculus is parallelly connected two oil circuits simultaneously: the one tunnel is connected to a 2/2-way solenoid directional control valve 3; Another road is connected to a underarm low pressure relief valve 2, and described 2/2-way solenoid directional control valve 3 all communicates with return opening with the outlet of low pressure relief valve 2.
The side outlet that described upper arm descending operation change-over valve links to each other with upper arm oil cylinder loculus is upper arm low pressure relief valve 7 of parallel connection simultaneously, and the outlet of low pressure relief valve 7 communicates with return opening.
The electric signal of after upper arm or underarm are fallen arm support, exporting near switch or travel switch under the arm support is connected with the switch of described 2/2-way solenoid directional control valve coil circuit.
As shown in Figure 1; A kind of jib arm protection system that falls comprises: underarm descending operation change-over valve 1, low pressure relief valve 2,2/2-way solenoid directional control valve 3, bidirectional balanced valve 4, underarm oil cylinder 5, upper arm descending operation change-over valve 6, low pressure relief valve 7, bidirectional balanced valve 8, upper arm oil cylinder 9 etc.Upper arm oil cylinder 9, underarm oil cylinder 5 are respectively by upper arm descending operation change-over valve 6,1 control of underarm descending operation change-over valve; Upper and lower arm and its are cooresponding all to be respectively equipped with bidirectional balanced valve 8 and bidirectional balanced valve 4 between reversing valve operated; It is characterized in that; The side outlet that underarm descending operation change-over valve 1 links to each other with underarm oil cylinder 5 loculuses is parallelly connected two oil circuits simultaneously: the one tunnel is connected to a 2/2-way solenoid directional control valve 3; Another road is connected to a low pressure relief valve 2, and described 2/2-way solenoid directional control valve 3 all communicates with return opening with the outlet of low pressure relief valve 2; The side outlet that upper arm descending operation change-over valve 6 links to each other with upper arm oil cylinder 9 loculuses is low pressure relief valve 7 of parallel connection simultaneously, and the outlet of low pressure relief valve 7 communicates with return opening.
The principle of work of the utility model is: after upper arm is fallen arm support, open with the low pressure relief valve 2 that reversing valve operated 1 outlet of upper arm links to each other, pressure oil is through low pressure relief valve 2 direct oil sump tanks; Simultaneously under the upper arm trigger arm support near (or stroke) switch; The 2/2-way solenoid directional control valve 3 that links to each other with reversing valve operated 1 outlet of underarm gets electric switching-over; If continue to fall arm; Then pressure oil is through the 3 direct off-loads of 2/2-way electromagnetic valve, to the jib arm that falls a kind of actv. safety precautions is provided.
Described low pressure relief valve 2 and low pressure relief valve 7 had both been made safety valve and had been used, again can actv. control upper arm, the arm speed that falls of underarm, and make the arm action more steadily reliable.
A kind of jib that the utility model provides arm protection system that falls; Compare with conventional art, safe and reliable when making high empty wagons fall arm, do not rely on operator's intuitive judgment; Can the actv. safety precautions be provided to jib, the jib that is particularly useful for the high empty wagons of the insulation arm protection that falls.
Description of drawings
Fig. 1 is the jib of the utility model arm protection system hydraulic schematic diagram that falls.
The specific embodiment
Embodiment 1, a kind of jib arm protection system that falls.
As shown in Figure 1; A kind of jib arm protection system that falls; Upper arm oil cylinder 9, underarm oil cylinder 5 are respectively by upper arm descending operation change-over valve 6,1 control of underarm descending operation change-over valve; Upper and lower arm and its are cooresponding all to be respectively equipped with bidirectional balanced valve 8 and bidirectional balanced valve 4 between reversing valve operated; The side outlet that underarm descending operation change-over valve 1 links to each other with underarm oil cylinder 5 loculuses is parallelly connected two oil circuits simultaneously: the one tunnel is connected to the solenoid directional control valve 3 of a 2/2-way, and another road is connected to a low pressure relief valve 2, and described 2/2-way solenoid directional control valve 3 all communicates with return opening with the outlet of low pressure relief valve 2.
The side outlet that described upper arm descending operation change-over valve 6 links to each other with upper arm oil cylinder 9 loculuses is low pressure relief valve 7 of parallel connection simultaneously, and low pressure relief valve 7 outlets communicate with return opening.When upper arm is fallen on the arm support, to open with the low pressure relief valve 7 that reversing valve operated 6 outlets of upper arm link to each other, pressure oil is through low pressure relief valve 7 direct oil sump tanks; Simultaneously upper arm fall behind the arm support under the trigger arm support near (or stroke) switch; The 2/2-way electromagnetic valve 3 of reversing valve operated 1 outlet of underarm gets electric switching-over; If continue to fall arm; Then pressure oil is through solenoid directional control valve 3 direct off-loads, to the jib arm that falls a kind of actv. safety guard-safeguard is provided; Low pressure relief valve 2 that underarm, the reversing valve operated outlet of upper arm are joined and low pressure relief valve 7 pressure controls had both been made safety valve usefulness to desired value, and the may command jib arm speed that falls guarantees the steadily reliable of arm again.
Claims (3)
1. jib arm protection system that falls is provided with arm support mixing on arm-type or the high empty wagons of folding-jib, has near switch or travel switch at arm support; Underarm descending operation change-over valve, bidirectional balanced valve are communicated with the underarm oil cylinder, constitute underarm and drive and control oil channel; Upper arm descending operation change-over valve, bidirectional balanced valve are communicated with the upper arm oil cylinder; Constituting upper arm drives and control oil channel; It is characterized in that; In described upper and lower arm driving and control oil channel, be provided with protection system, the structure of this protection system is following: in described underarm driving and control oil channel, also be provided with underarm low pressure relief valve and 2/2-way solenoid directional control valve; In described upper arm driving and control oil channel, also be provided with the upper arm low pressure relief valve.
2. the jib according to claim 1 arm protection system that falls; It is characterized in that; The connection structure of said protection system is: upper arm oil cylinder, underarm oil cylinder are respectively by upper arm descending operation change-over valve, the control of underarm descending operation change-over valve; Upper and lower arm and its are cooresponding all to be provided with bidirectional balanced valve between reversing valve operated; The side outlet that underarm descending operation change-over valve links to each other with underarm oil cylinder loculus is parallelly connected two oil circuits simultaneously: the one tunnel is connected to a 2/2-way solenoid directional control valve, and another road is connected to a underarm low pressure relief valve, and described 2/2-way solenoid directional control valve all communicates with return opening with the outlet of underarm low pressure relief valve; The side outlet that described upper arm descending operation change-over valve links to each other with upper arm oil cylinder loculus is upper arm low pressure relief valve of parallel connection simultaneously, and the outlet of upper arm low pressure relief valve communicates with return opening.
3. the jib according to claim 1 and 2 arm protection system that falls; It is characterized in that; The electric signal of after upper arm or underarm are fallen arm support, exporting near switch or travel switch under the said arm support is connected with the switch of described 2/2-way solenoid directional control valve coil circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220057245 CN202492341U (en) | 2012-02-21 | 2012-02-21 | Descend arm protection system of arm support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220057245 CN202492341U (en) | 2012-02-21 | 2012-02-21 | Descend arm protection system of arm support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202492341U true CN202492341U (en) | 2012-10-17 |
Family
ID=46998577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220057245 Expired - Fee Related CN202492341U (en) | 2012-02-21 | 2012-02-21 | Descend arm protection system of arm support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202492341U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122894A (en) * | 2012-10-26 | 2013-05-29 | 中联重科股份有限公司 | Hydraulic system for controlling rotation of arm support, control method thereof and concrete pumping equipment |
| CN103591064A (en) * | 2013-11-18 | 2014-02-19 | 长沙中联消防机械有限公司 | Landing leg control hydraulic system and engineering vehicle |
-
2012
- 2012-02-21 CN CN 201220057245 patent/CN202492341U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122894A (en) * | 2012-10-26 | 2013-05-29 | 中联重科股份有限公司 | Hydraulic system for controlling rotation of arm support, control method thereof and concrete pumping equipment |
| CN103122894B (en) * | 2012-10-26 | 2015-04-15 | 中联重科股份有限公司 | Hydraulic system for controlling rotation of arm support, control method thereof and concrete pumping equipment |
| CN103591064A (en) * | 2013-11-18 | 2014-02-19 | 长沙中联消防机械有限公司 | Landing leg control hydraulic system and engineering vehicle |
| CN103591064B (en) * | 2013-11-18 | 2016-04-06 | 长沙中联消防机械有限公司 | Landing leg control hydraulic system and engineering vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20200221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |