CN211619871U - Emergency descending structure of aerial work platform - Google Patents
Emergency descending structure of aerial work platform Download PDFInfo
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- CN211619871U CN211619871U CN201922001627.XU CN201922001627U CN211619871U CN 211619871 U CN211619871 U CN 211619871U CN 201922001627 U CN201922001627 U CN 201922001627U CN 211619871 U CN211619871 U CN 211619871U
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Abstract
The utility model relates to the technical field of aerial work platforms, and discloses an aerial work platform emergency descending structure, which comprises an upper lifting valve for controlling the lifting of an upper lifting oil cylinder, a lower lifting valve for controlling the lifting of a lower lifting oil cylinder, and an emergency zipper for controlling the oil return of the upper lifting oil cylinder and the oil return of the lower lifting oil cylinder during power failure; the lifting valve comprises a first one-way valve, a second one-way valve and a first damper; the lower lifting valve comprises an electromagnetic directional valve, a second damper and a fourth one-way valve; the electromagnetic directional valve is in a normally closed state under the condition of no electricity, and is in a one-way flow state in the direction of leading to the oil inlet pipeline when electrified; the emergency zipper is connected with the electromagnetic directional valve, and the electromagnetic directional valve in a normally closed state is switched to a one-way circulation state by pulling the emergency zipper. In this way, the utility model discloses can cause when work platform can't descend in electric power system breaks down, work platform after will playing to rise slowly steadily falls through the mode of the emergent zip of pulling.
Description
Technical Field
The utility model relates to an aerial working platform technical field especially relates to an emergent decline structure of aerial working platform.
Background
The scissor-fork type aerial work platform is special equipment for aerial work with wide application, and is particularly widely applied in the building and decoration industries.
The scissor fork type aerial work platform comprises a running chassis, a scissor fork assembly, a lifting oil cylinder and a working platform, wherein the scissor fork assembly is fixedly connected with the running chassis and the working platform, the lifting oil cylinder is arranged on the scissor fork assembly, and the lifting oil cylinder is used for driving the scissor fork assembly to move up and down so as to control the lifting height of the working platform. The traveling chassis can facilitate the movement of the whole scissor-type aerial work platform and has higher bearing capacity; the scissor assembly structure of the scissor type aerial work platform can ensure that the lifting of the work platform has higher stability; the wide working platform can make the high-altitude operation range larger and is suitable for simultaneous operation of a plurality of people.
However, the lifting operation of the lifting oil cylinder in the scissor-type aerial work platform is controlled by the electric power system, namely, the switching of a liquid path is realized by switching on and off the electromagnetic valve by the electric power system, so that the aim of lifting or descending the lifting oil cylinder is fulfilled. The electric elements in the power system are used more and the circuit is complex, so the failure rate is high. When a worker is on the working platform and the working platform is in a lifting state, if a power system fails, the lifted working platform cannot descend, so that the worker on the working platform is dangerous to operate at high altitude.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides an emergent decline structure of aerial working platform can break down when causing work platform can't descend in electric power system, and the work platform after will rising to rise slowly steadily falls through the mode of the emergent zip of pulling.
In order to solve the technical problem, the utility model discloses a technical scheme be: the emergency descending structure of the aerial work platform is applied to a scissor-type aerial work platform, an upper lifting oil cylinder and a lower lifting oil cylinder for controlling the working platform to ascend and descend are arranged on the scissor-type aerial work platform, and the upper lifting oil cylinder and the lower lifting oil cylinder are arranged on a scissor assembly of the scissor-type aerial work platform; emergent decline structure of aerial working platform includes: the emergency pull lock is used for controlling the oil return of the upper lifting oil cylinder and the lower lifting oil cylinder when the power is off; the lifting valve comprises a first one-way valve, a second one-way valve and a first damper; two working oil ways of the first one-way valve are respectively connected with an oil inlet pipeline and the lower lifting oil cylinder, and oil in the oil inlet pipeline can flow to the lower lifting oil cylinder through the first one-way valve; the working oil path of the first one-way valve connected with the upper lifting oil cylinder is provided with the first damper, the working oil path of the first one-way valve connected with the upper lifting oil cylinder is also provided with a second one-way valve connected with the first damper in parallel, and the flow direction of the second one-way valve is the same as that of the first one-way valve; the lower lifting valve comprises an electromagnetic directional valve, a second damper and a fourth one-way valve; two working oil paths of the electromagnetic directional valve are respectively connected with the oil inlet pipeline and the lower lifting oil cylinder, and the second damper is arranged on the working oil path of the electromagnetic directional valve connected with the lower lifting oil cylinder; an oil inlet of the fourth one-way valve is connected with a working oil path between the first damper and the first one-way valve, and an oil outlet of the fourth one-way valve is connected with a working oil path between the second damper and the lower lifting oil cylinder; the electromagnetic reversing valve is in a normally closed state when no electricity is available, and is in a one-way flow state in the direction of leading to the oil inlet pipeline when the electromagnetic reversing valve is powered on; the emergency zipper is connected with the electromagnetic directional valve, and pulls the emergency zipper and controls the electromagnetic directional valve in a normally closed state to be switched to a one-way circulation state.
Preferably, the lower lift valve further comprises an overflow valve; an oil inlet of the overflow valve is connected with a working oil path between the second damper and the lower lifting oil cylinder, and an oil outlet of the overflow valve is connected with a working oil path between the electromagnetic directional valve and the oil inlet pipeline; the overflow valve can ensure the pressure of the whole hydraulic system and avoid the overhigh pressure of the hydraulic system.
Preferably, the lower lift valve further comprises a pressure switch; the pressure switch is arranged on a working oil path between the electromagnetic directional valve and the second damper; when the working platform of the scissor-type aerial work platform is overloaded, the pressure switch can control the oil inlet pipeline to stop feeding oil through the controller, and simultaneously control the alarm to give an alarm through the controller.
Preferably, a third one-way valve connected with the second damper in parallel is further arranged on a working oil path connecting the electromagnetic directional valve and the lower lifting oil cylinder; an oil inlet of the third one-way valve is connected with a working oil path between the electromagnetic directional valve and the second damper, and an oil outlet of the third one-way valve is connected with a working oil path between the second damper and the lower lifting oil cylinder; the electromagnetic reversing valve is a two-way reversing valve, the electromagnetic reversing valve is also in a one-way flow state under the condition of no electricity, the one-way flow state of the electromagnetic reversing valve under the condition of no electricity is opposite to the one-way flow state under the condition of electrification, namely the electromagnetic reversing valve is in the one-way flow state in the direction of leading to the second damper under the condition of no electricity; the oil inlet pipeline can have two oil inlet routes to the lower lifting oil cylinder, and the oil inlet efficiency is guaranteed.
Preferably, the emergency zipper is fixedly arranged on a running chassis of the scissor-fork type aerial work platform, and the mounting position is easy to operate and convenient for emergency descending; secondly, when the emergency zipper is positioned at the mounting position, the connection between a pull wire of the emergency zipper and the lower lifting control valve is firm; after the working platform of the scissor type aerial work platform is lifted, the emergency zipper is pulled, and the scissor assembly slowly descends to the end.
The utility model has the advantages that: the utility model can slowly and stably descend the lifted working platform by pulling the emergency zipper when the working platform can not descend due to the failure of the power system, thereby preventing the danger of the working personnel on the working platform; the structure is simple, the operation and the use are convenient, and the safety is high.
Drawings
Fig. 1 is a schematic structural view of an emergency descending structure of an aerial work platform applied to a scissor-type aerial work platform;
fig. 2 is a schematic connection diagram of an embodiment 1 of an emergency descending structure of an aerial work platform of the present invention;
fig. 3 is a schematic connection diagram of embodiment 2 of an emergency descending structure of an aerial work platform of the present invention.
The parts in the drawings are numbered as follows: 1. a scissor-fork aerial work platform; 2. a running chassis; 3. a scissor assembly; 4. a working platform; 51. lifting the oil cylinder; 52. a lower lifting oil cylinder; 6. an oil inlet pipeline; 7. a lift valve; 71. a first check valve; 72. a second one-way valve; 73. a first damper; 8. a lower lift valve; 81. An electromagnetic directional valve; 82. a second damper; 83. a third check valve; 84. a fourth check valve; 85. an overflow valve; 86. a pressure switch; 9. an emergency zipper.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Referring to fig. 1 to 3, an embodiment of the present invention includes:
example 1
An emergency descending structure of an aerial work platform is applied to a scissor-fork type aerial work platform 1; the scissor type aerial work platform 1 is provided with an upper lifting oil cylinder 51 and a lower lifting oil cylinder 52 which are used for controlling the working platform 4 to lift up and down, and the upper lifting oil cylinder 51 and the lower lifting oil cylinder 52 are arranged on a scissor assembly 3 of the scissor type aerial work platform 1. This emergency descending structure of aerial work platform includes: the emergency zipper device comprises an upper lifting valve 7 for controlling the upper lifting oil cylinder 51 to lift, a lower lifting valve 8 for controlling the lower lifting oil cylinder 52 to lift, and an emergency zipper 9 for controlling oil return of the upper lifting oil cylinder 51 and the lower lifting oil cylinder 52 when power is off.
The lift valve 7 includes a first check valve 71, a second check valve 72, and a first damper 73. Two working oil paths of the first check valve 71 are respectively connected with an oil inlet pipeline 6 and the lower lifting cylinder 52, and oil in the oil inlet pipeline 6 can flow to the lower lifting cylinder 52 through the first check valve 71; specifically, an oil inlet of the first check valve 71 is connected to the oil inlet pipeline 6, and an oil outlet of the first check valve 71 is connected to the lower lift cylinder 52. The first damper 73 is arranged on a working oil path connecting the first check valve 71 and the upper lifting oil cylinder 51, and the second check valve 72 connected with the first damper 73 in parallel is also arranged on a working oil path connecting the first check valve 71 and the upper lifting oil cylinder 51; the flow direction of the second one-way valve 72 is the same as that of the first one-way valve 71, that is, the oil inlet of the second one-way valve 72 is connected with the oil outlet of the first one-way valve 71. The liquid path design can facilitate the oil inlet pipeline 6 to feed oil to the lifting oil cylinder 51, and can effectively prevent the lifting oil cylinder 51 from returning oil along the oil feeding route.
The lower lift valve 8 includes a solenoid directional valve 81, a second damper 82, a fourth check valve 84, an overflow valve 85, and a pressure switch 86. Two working oil paths of the electromagnetic directional valve 81 are respectively connected with the oil inlet pipeline 6 and the lower lifting oil cylinder 52, and the second damper 82 is arranged on the working oil path of the electromagnetic directional valve 81 connected with the lower lifting oil cylinder 52; an oil inlet of the fourth check valve 84 is connected with a working oil path between the first damper 73 and the first check valve 71, and an oil outlet of the fourth check valve 84 is connected with a working oil path between the second damper 82 and the lower lift cylinder 52. The electromagnetic directional valve 81 is in a normally closed state without electricity and does not flow, the electromagnetic directional valve 81 flows in a single direction when being electrified, and the single direction flow direction can enable oil to flow into the oil inlet pipeline 6. The liquid path design can facilitate the oil inlet pipeline 6 to feed oil into the lower lifting oil cylinder 52, and can effectively prevent the lower lifting oil cylinder 52 from returning oil along an oil feeding route. An oil inlet of the overflow valve 85 is connected with a working oil path between the second damper 82 and the lower lifting oil cylinder 52, and an oil outlet of the overflow valve 85 is connected with a working oil path between the electromagnetic directional valve 81 and the oil inlet pipeline 6; the overflow valve 85 can ensure the pressure of the whole hydraulic system and avoid the overhigh pressure of the hydraulic system. The pressure switch 86 is provided in the working oil path between the electromagnetic directional valve 81 and the second damper 82; when the working platform 4 of the scissor-type aerial work platform 1 is overloaded, the pressure switch 86 controls the oil inlet pipeline 6 to stop feeding oil through the controller, and controls the alarm to give an alarm through the controller.
The emergency zipper 9 is connected with the electromagnetic directional valve 81, and the emergency zipper 9 can enable the electromagnetic directional valve 81 in a normally closed state to be switched to a one-way circulation state, so that the oil return of the upper lifting oil cylinder 51 and the oil return of the lower lifting oil cylinder 52 are facilitated. Under the condition that the working platform 4 is in a lifting state, if a power system fails or is in a power-free state, the emergency zipper 9 is pulled, the electromagnetic directional valve 81 in a normally closed state is switched to a one-way circulation state, at the moment, due to the action of gravity, oil in the upper lifting oil cylinder 51 flows to the oil inlet pipeline 6 along the oil passages of the second damper 82 and the electromagnetic directional valve 81, oil in the lower lifting oil cylinder 52 flows to the oil inlet pipeline 6 along the oil passages of the first damper 73, the fourth one-way valve 84, the second damper 82 and the electromagnetic directional valve 81, and oil flowing to the oil inlet pipeline 6 flows back to the main oil cylinder, so that the purpose of slowly and stably descending the working platform 4 is achieved.
The emergency zipper 9 is fixedly arranged on the running chassis 2 of the scissor-fork type aerial work platform 1, and the mounting position is easy to operate and convenient for emergency descent; secondly, when the emergency zipper is positioned at the installation position, the connection between the pull wire of the emergency zipper 9 and the lower lifting control valve is firm; after the working platform 4 of the scissor-fork type aerial work platform 1 is lifted, the emergency zipper 9 is pulled, the scissor-fork assembly 3 slowly descends and descends to the bottom, and the working platform 4 is further caused to synchronously descend; after the upper lifting oil cylinder 51 and the lower lifting oil cylinder 52 are lowered to the proper positions, the emergency zipper 9 and the electromagnetic directional valve 81 are automatically reset.
Example 2
An emergency descending structure of an aerial work platform is applied to a scissor-fork type aerial work platform 1; the scissor type aerial work platform 1 is provided with an upper lifting oil cylinder 51 and a lower lifting oil cylinder 52 which are used for controlling the scissor assembly 3 to move up and down. This emergency descending structure of aerial work platform includes: the emergency zipper device comprises an upper lifting valve 7 for controlling the upper lifting oil cylinder 51 to lift, a lower lifting valve 8 for controlling the lower lifting oil cylinder 52 to lift, and an emergency zipper 9 for controlling oil return of the upper lifting oil cylinder 51 and the lower lifting oil cylinder 52 when power is off.
The lift valve 7 includes a first check valve 71, a second check valve 72, and a first damper 73. Two working oil paths of the first check valve 71 are respectively connected with an oil inlet pipeline 6 and the lower lifting cylinder 52, and oil in the oil inlet pipeline 6 can flow to the lower lifting cylinder 52 through the first check valve 71; specifically, an oil inlet of the first check valve 71 is connected to the oil inlet pipeline 6, and an oil outlet of the first check valve 71 is connected to the lower lift cylinder 52. The first damper 73 is arranged on a working oil path connecting the first check valve 71 and the upper lifting oil cylinder 51, and the second check valve 72 connected with the first damper 73 in parallel is also arranged on a working oil path connecting the first check valve 71 and the upper lifting oil cylinder 51; the flow direction of the second one-way valve 72 is the same as that of the first one-way valve 71, that is, the oil inlet of the second one-way valve 72 is connected with the oil outlet of the first one-way valve 71. The liquid path design can facilitate the oil inlet pipeline 6 to feed oil to the lifting oil cylinder 51, and can effectively prevent the lifting oil cylinder 51 from returning oil along the oil feeding route.
The lower lift valve 8 includes a solenoid directional valve 81, a second damper 82, a third check valve 83, a fourth check valve 84, an overflow valve 85, and a pressure switch 86. Two working oil paths of the electromagnetic directional valve 81 are respectively connected with the oil inlet pipeline 6 and the lower lifting oil cylinder 52, the second damper 82 is arranged on the working oil path of the electromagnetic directional valve 81 connected with the lower lifting oil cylinder 52, and a third one-way valve 83 connected with the second damper 82 in parallel is also arranged on the working oil path of the electromagnetic directional valve 81 connected with the lower lifting oil cylinder 52; an oil inlet of the third check valve 83 is connected with a working oil path between the electromagnetic directional valve 81 and the second damper 82, and an oil outlet of the third check valve 83 is connected with a working oil path between the second damper 82 and the lower lifting oil cylinder 52; an oil inlet of the fourth check valve 84 is connected with a working oil path between the first damper 73 and the first check valve 71, and an oil outlet of the fourth check valve 84 is connected with a working oil path between the second damper 82 and the lower lift cylinder 52. The electromagnetic directional valve 81 is a two-way directional valve, the electromagnetic directional valve 81 is in a one-way flow state both in a non-power condition and in a power-on condition, the one-way flow state of the electromagnetic directional valve 81 in the non-power condition is opposite to the one-way flow state in the power-on condition, that is, the electromagnetic directional valve 81 is in the one-way flow state in the direction leading to the second damper 82 in the non-power condition, and the electromagnetic directional valve 81 is in the one-way flow state in the direction leading to the oil inlet pipeline 6 in the power-on condition. The liquid path design can facilitate the oil inlet pipeline 6 to feed oil into the lower lifting oil cylinder 52, and can effectively prevent the lower lifting oil cylinder 52 from returning oil along an oil feeding route. An oil inlet of the overflow valve 85 is connected with a working oil path between the second damper 82 and the lower lifting oil cylinder 52, and an oil outlet of the overflow valve 85 is connected with a working oil path between the electromagnetic directional valve 81 and the oil inlet pipeline 6; the overflow valve 85 can ensure the pressure of the whole hydraulic system and avoid the overhigh pressure of the hydraulic system. The pressure switch 86 is provided in the working oil path between the electromagnetic directional valve 81 and the second damper 82; when the working platform 4 of the scissor-type aerial work platform 1 is overloaded, the pressure switch 86 controls the oil inlet pipeline 6 to stop feeding oil through the controller, and controls the alarm to give an alarm through the controller.
The emergency zipper 9 is connected with the electromagnetic directional valve 81, and the emergency zipper 9 can enable the electromagnetic directional valve 81 in a normally closed state to be switched to a one-way circulation state, so that the oil return of the upper lifting oil cylinder 51 and the oil return of the lower lifting oil cylinder 52 are facilitated. Under the condition that the working platform 4 is in a lifting state, if a power system fails or is in a power-free state, the emergency zipper 9 is pulled, the electromagnetic directional valve 81 in a normally closed state is switched to a one-way circulation state, at the moment, due to the action of gravity, oil in the upper lifting oil cylinder 51 flows to the oil inlet pipeline 6 along the oil passages of the second damper 82 and the electromagnetic directional valve 81, oil in the lower lifting oil cylinder 52 flows to the oil inlet pipeline 6 along the oil passages of the first damper 73, the fourth one-way valve 84, the second damper 82 and the electromagnetic directional valve 81, and oil flowing to the oil inlet pipeline 6 flows back to the main oil cylinder, so that the purpose of slowly and stably descending the working platform 4 is achieved.
The emergency zipper 9 is fixedly arranged on the running chassis 2 of the scissor-fork type aerial work platform 1, and the mounting position is easy to operate and convenient for emergency descent; secondly, when the emergency zipper is positioned at the installation position, the connection between the pull wire of the emergency zipper 9 and the lower lifting control valve is firm; after the working platform 4 of the scissor-fork type aerial work platform 1 is lifted, the emergency zipper 9 is pulled, the scissor-fork assembly 3 slowly descends and descends to the bottom, and the working platform 4 is further caused to synchronously descend; after the upper lifting oil cylinder 51 and the lower lifting oil cylinder 52 are lowered to the proper positions, the emergency zipper 9 and the electromagnetic directional valve 81 are automatically reset.
The utility model can slowly and stably descend the lifted working platform 4 by pulling the emergency zipper 9 when the working platform 4 can not descend due to the failure of the power system, thereby preventing the danger of the working personnel on the working platform 4; the structure is simple, the operation and the use are convenient, and the safety is high.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (5)
1. An emergency descending structure of an aerial work platform is applied to a scissor-type aerial work platform, wherein an upper lifting oil cylinder and a lower lifting oil cylinder which are used for controlling the work platform to ascend and descend are arranged on the scissor-type aerial work platform, and the upper lifting oil cylinder and the lower lifting oil cylinder are arranged on a scissor assembly of the scissor-type aerial work platform; the emergency descending structure of the aerial work platform is characterized by comprising: the emergency pull lock is used for controlling the oil return of the upper lifting oil cylinder and the lower lifting oil cylinder when the power is off;
the lifting valve comprises a first one-way valve, a second one-way valve and a first damper; two working oil ways of the first one-way valve are respectively connected with an oil inlet pipeline and the lower lifting oil cylinder, and oil in the oil inlet pipeline can flow to the lower lifting oil cylinder through the first one-way valve; the working oil path of the first one-way valve connected with the upper lifting oil cylinder is provided with the first damper, the working oil path of the first one-way valve connected with the upper lifting oil cylinder is also provided with a second one-way valve connected with the first damper in parallel, and the flow direction of the second one-way valve is the same as that of the first one-way valve;
the lower lifting valve comprises an electromagnetic directional valve, a second damper and a fourth one-way valve; two working oil paths of the electromagnetic directional valve are respectively connected with the oil inlet pipeline and the lower lifting oil cylinder, and the second damper is arranged on the working oil path of the electromagnetic directional valve connected with the lower lifting oil cylinder; an oil inlet of the fourth one-way valve is connected with a working oil path between the first damper and the first one-way valve, and an oil outlet of the fourth one-way valve is connected with a working oil path between the second damper and the lower lifting oil cylinder; the electromagnetic reversing valve is a two-way reversing valve, is in a normally closed state under the condition of no electricity, and is in a one-way flow state in the direction leading to the oil inlet pipeline when electrified;
the emergency zipper is connected with the electromagnetic directional valve, and pulls the emergency zipper and controls the electromagnetic directional valve in a normally closed state to be switched to a one-way circulation state.
2. The emergency descending structure of the aerial work platform according to claim 1, wherein: the lower lifting valve also comprises an overflow valve; and the oil inlet of the overflow valve is connected with a working oil path between the second damper and the lower lifting oil cylinder, and the oil outlet of the overflow valve is connected with a working oil path between the electromagnetic directional valve and the oil inlet pipeline.
3. An emergency lowering structure for an aerial work platform according to claim 1 or 2, wherein: the lower lifting valve further comprises a pressure switch; the pressure switch is arranged on a working oil path between the electromagnetic directional valve and the second damper.
4. The emergency descending structure of the aerial work platform according to claim 1, wherein: a working oil path of the electromagnetic directional valve connected with the lower lifting oil cylinder is also provided with a third one-way valve connected with the second damper in parallel; an oil inlet of the third one-way valve is connected with a working oil path between the electromagnetic directional valve and the second damper, and an oil outlet of the third one-way valve is connected with a working oil path between the second damper and the lower lifting oil cylinder; the electromagnetic directional valve is a two-way directional valve, the electromagnetic directional valve is also in a one-way flow state under the condition of no electricity, the one-way flow state of the electromagnetic directional valve under the condition of no electricity is opposite to the one-way flow state of the electromagnetic directional valve under the condition of electrification, namely the electromagnetic directional valve is in the one-way flow state in the direction of leading to the second damper under the condition of no electricity.
5. The emergency descending structure of the aerial work platform according to claim 1, wherein: the emergency zipper is fixedly arranged on a running chassis of the scissor-fork type aerial work platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922001627.XU CN211619871U (en) | 2019-11-19 | 2019-11-19 | Emergency descending structure of aerial work platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922001627.XU CN211619871U (en) | 2019-11-19 | 2019-11-19 | Emergency descending structure of aerial work platform |
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| Publication Number | Publication Date |
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| CN211619871U true CN211619871U (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922001627.XU Active CN211619871U (en) | 2019-11-19 | 2019-11-19 | Emergency descending structure of aerial work platform |
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| CN (1) | CN211619871U (en) |
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