阅读说明：本技术 单缸插销控制系统、伸缩臂及起重机 (Single-cylinder bolt control system, telescopic boom and crane ) 是由 黎晓强 王圣磊 安术军 于 2019-10-11 设计创作，主要内容包括：一种单缸插销控制系统、伸缩臂及起重机,涉及起重机械技术领域。该单缸插销控制系统包括伸缩油缸、缸销油缸和臂销油缸,还包括缸臂销切换阀、具有缸销应急阀和臂销应急阀的应急阀组。缸销应急阀与缸销油缸连通,用于控制缸销油缸驱动缸销做伸缩运动,臂销应急阀与臂销油缸连通,用于控制臂销油缸驱动臂销做伸缩运动,缸臂销切换阀包括第一油口、第二油口和第三油口,第一油口与伸缩油缸连通,第二油口与第三油口分别与缸销应急阀和臂销应急阀连通,缸臂销切换阀可与臂销应急阀连通或与缸销应急阀连通。该伸缩臂采用了上述的单缸插销控制系统。该起重机采用了上述的伸缩臂。(A single-cylinder bolt control system, a telescopic boom and a crane relate to the technical field of hoisting machinery. The single-cylinder bolt control system comprises a telescopic oil cylinder, a cylinder pin oil cylinder, an arm pin oil cylinder, a cylinder arm pin switching valve and an emergency valve group with a cylinder pin emergency valve and an arm pin emergency valve. The cylinder pin emergency valve is communicated with the cylinder pin oil cylinder and used for controlling the cylinder pin oil cylinder to drive the cylinder pin to do telescopic motion, the arm pin emergency valve is communicated with the arm pin oil cylinder and used for controlling the arm pin oil cylinder driving arm pin to do telescopic motion, the cylinder arm pin switching valve comprises a first oil port, a second oil port and a third oil port, the first oil port is communicated with the telescopic oil cylinder, the second oil port and the third oil port are respectively communicated with the cylinder pin emergency valve and the arm pin emergency valve, and the cylinder arm pin switching valve can be communicated with the arm pin emergency valve or communicated with the cylinder pin emergency valve. The telescopic arm adopts the single-cylinder bolt control system. The crane adopts the telescopic arm.)

1. A single cylinder bolt control system (100) comprising a telescopic cylinder (10), a cylinder pin cylinder (20) and an arm pin cylinder (30), characterized by further comprising:

emergency valve group, including jar round pin emergency valve (41) and arm round pin emergency valve (42), jar round pin emergency valve (41) with jar round pin hydro-cylinder (20) intercommunication, be used for control jar round pin hydro-cylinder (20) actuating cylinder round pin is for telescopic cylinder (10) is concertina movement, arm round pin emergency valve (42) with arm round pin hydro-cylinder (30) intercommunication, be used for control arm round pin hydro-cylinder (30) actuating arm round pin is for telescopic cylinder (10) is telescopic movement, and

the cylinder arm pin switching valve (50) comprises a first oil port (51), a second oil port (52) and a third oil port (53), the first oil port (51) is communicated with the telescopic oil cylinder (10), the second oil port (52) and the third oil port (53) are respectively communicated with the cylinder pin emergency valve (41) and the arm pin emergency valve (42),

the cylinder arm pin switching valve (50) may be in communication with the arm pin emergency valve (42) or in communication with the cylinder pin emergency valve (41).

2. The single cylinder deadbolt control system (100) of claim 1, wherein the cylinder-arm-pin switching valve (50) is an electromagnetic switching valve and the cylinder-pin contingency valve (41) and the arm-pin contingency valve (42) are hydraulic switching valves.

3. The single cylinder latch control system (100) of claim 1, further comprising an emergency state switching valve (60), the emergency state switching valve (60) being in communication with the arm pin emergency valve (42) and the cylinder pin emergency valve (41), respectively, for controlling the opening or closing of the emergency valve bank.

4. The single cylinder latch control system (100) of claim 3, further comprising a cylinder arm pin emergency switching valve (70), wherein the cylinder arm pin emergency switching valve (70) is respectively communicated with the arm pin emergency valve (42) and the cylinder pin emergency valve (41) for communicating with the arm pin emergency valve (42) to control the arm pin cylinder (30) to drive the arm pin to move telescopically, or for communicating with the cylinder pin emergency valve (41) to control the cylinder pin cylinder (20) to drive the cylinder pin to move telescopically.

5. The single cylinder latch control system (100) of claim 4, wherein the emergency state switching valve (60) and the cylinder arm pin emergency switching valve (70) are both solenoid switching valves.

6. The single cylinder latch control system (100) of claim 4, further comprising a conduit retraction device (80) connected to the control circuit (90) for receiving hydraulic hoses on the control circuit (90).

7. The single cylinder deadbolt control system (100) of claim 6, wherein said conduit retraction device (80) is a hose reel disposed on a control oil path (90) between said emergency valve bank and said emergency state switching valve (60) and said cylinder arm pin switching valve (50).

8. A telescopic arm, characterized in that it comprises a single cylinder latch control system (100) according to any one of claims 1 to 7.

9. A crane comprising a telescopic arm as claimed in claim 8.

10. The crane according to claim 9, further comprising an emergency state switching valve (60) in communication with the arm pin emergency valve (42) and the cylinder pin emergency valve (41), respectively, and a cylinder arm pin emergency switching valve (70) in communication with the arm pin emergency valve (42) and the cylinder pin emergency valve (41), respectively;

the emergency state switching valve (60) and the cylinder arm pin emergency switching valve (70) are both electromagnetic switching valves, the cylinder arm pin switching valve (50), the arm pin emergency valve (42) and the cylinder pin emergency valve (41) are all arranged on a telescopic arm of the crane, and the emergency state switching valve (60) and the cylinder arm pin emergency switching valve (70) are all arranged on a rotary table of the crane.

Technical Field

The invention relates to the technical field of hoisting machinery, in particular to a single-cylinder bolt control system, a telescopic boom and a crane.

Background

The multi-arm crane mostly adopts a single-cylinder bolt type telescopic mechanism, and the telescopic function of the telescopic arm is realized through the cooperation of a telescopic oil cylinder, a cylinder pin, an arm pin and a cylinder arm pin driving mechanism with the cylinder pin oil cylinder and the arm pin oil cylinder. The cylinder pin oil cylinder drives the cylinder pin to be inserted and pulled out so as to control the telescopic part of the telescopic oil cylinder to be locked or separated with the arm sections of the telescopic arm, and the arm pin oil cylinder drives the arm pin to be inserted and pulled out so as to control the adjacent two arm sections to be locked or separated. When a certain arm section needs to be extended, a cylinder pin oil cylinder drives a cylinder pin to act, a telescopic oil cylinder and the arm section are locked, then the arm pin oil cylinder drives the arm pin to act, the locking between the arm section and the arm section of the previous section is released, and the arm section is extended to a target position along with the telescopic oil cylinder; and then the arm pin moves under the driving of the arm pin oil cylinder to lock the arm section and the previous arm section to a target position, then the cylinder pin oil cylinder drives the cylinder pin to move, the locking between the telescopic oil cylinder and the arm section is released, and the like so as to realize the telescopic function.

As shown in fig. 1, in the prior art, the normal insertion and extraction of the cylinder pin or the arm pin of the truck crane is usually realized by using a cylinder arm pin switching valve 50' and controlling the cylinder arm pin switching valve to lose power through a program. However, once the cylinder arm pin switching valve 50' is not reset or is not reversed due to factors such as clamping stagnation, interruption of electric control signals, damage of coils, damage of a core tube of the telescopic cylinder 10', and the like, the cylinder arm pin and the arm pin of the telescopic cylinder 10' cannot work normally, and the telescopic arm cannot be retracted or extended normally, thereby seriously affecting the operation safety of the crane.

Disclosure of Invention

The invention aims to provide a single-cylinder bolt control system, a telescopic boom and a crane, wherein the single-cylinder bolt control system can still enable a cylinder pin or a boom pin to be normally inserted and pulled out when a cylinder boom pin switching valve loses functions due to sudden failures, so that the operation reliability of the telescopic boom is improved.

The embodiment of the invention is realized by the following steps:

in one aspect of the invention, a single-cylinder bolt control system is provided, and the single-cylinder bolt control system comprises a telescopic oil cylinder, a cylinder pin oil cylinder, an arm pin oil cylinder, an emergency valve bank and a cylinder arm pin switching valve. Emergent valves include the emergent valve of jar round pin and the emergent valve of arm round pin, jar round pin emergent valve with jar round pin hydro-cylinder intercommunication is used for control jar round pin hydro-cylinder drive cylinder round pin for telescopic cylinder is the concertina movement, arm round pin emergent valve with arm round pin hydro-cylinder intercommunication is used for control arm round pin is for telescopic cylinder is the concertina movement, and jar arm round pin diverter valve includes first hydraulic fluid port, second hydraulic fluid port and third hydraulic fluid port, first hydraulic fluid port with telescopic cylinder intercommunication, the second hydraulic fluid port with the third hydraulic fluid port respectively with jar round pin emergent valve with arm round pin emergent valve intercommunication, jar arm round pin diverter valve can with arm round pin emergent valve intercommunication or with jar round pin emergent valve intercommunication. The single-cylinder bolt control system can still enable the cylinder pin or the arm pin to be normally plugged and unplugged when the cylinder arm pin switching valve loses functions due to sudden failures, and therefore the operation reliability of the telescopic arm is improved.

Optionally, the cylinder-arm-pin switching valve is an electromagnetic switching valve, and the cylinder-pin emergency valve and the arm-pin emergency valve are hydraulic switching valves.

Optionally, the single-cylinder bolt control system further comprises an emergency state switching valve, and the emergency state switching valve is communicated with the arm pin emergency valve and the cylinder pin emergency valve respectively and is used for controlling the opening or closing of the emergency valve bank.

Optionally, the single-cylinder bolt control system further comprises a cylinder arm pin emergency switching valve, and the cylinder arm pin emergency switching valve is respectively communicated with the arm pin emergency valve and the cylinder pin emergency valve, and is used for communicating with the arm pin emergency valve to control the arm pin oil cylinder to drive the arm pin to perform telescopic motion, or is used for communicating with the cylinder pin emergency valve to control the cylinder pin oil cylinder to drive the cylinder pin to perform telescopic motion.

Optionally, the emergency state switching valve and the cylinder arm pin emergency switching valve are both electromagnetic switching valves.

Optionally, the single-cylinder bolt control system further comprises a pipeline retracting device connected to the control oil path and used for accommodating each hydraulic rubber pipe on the control oil path.

Optionally, the pipeline winding and unwinding device is a hose reel, and the hose reel is arranged on a control oil path between the emergency valve bank and the emergency state switching valve and between the emergency state switching valve and the cylinder arm pin switching valve.

In another aspect of the invention, a telescopic boom is provided, which adopts the single-cylinder bolt control system. The single-cylinder bolt control system of the telescopic boom can still enable the cylinder pin or the boom pin to be normally plugged and unplugged when the cylinder boom pin switching valve loses functions due to sudden failures, and therefore the operation reliability of the telescopic boom is improved.

In another aspect of the invention, a crane is provided, which employs the telescopic boom. According to the telescopic boom of the crane, when the cylinder boom pin switching valve loses functions due to sudden failures, the cylinder boom pin or the boom pin can still be normally plugged and pulled out, so that the operation reliability of the telescopic boom is improved.

Optionally, the crane further comprises an emergency state switching valve respectively communicated with the arm pin emergency valve and the cylinder pin emergency valve, and a cylinder arm pin emergency switching valve respectively communicated with the arm pin emergency valve and the cylinder pin emergency valve; the emergency switching valve and the cylinder arm pin emergency switching valve are both electromagnetic switching valves, the cylinder arm pin switching valve, the arm pin emergency valve and the cylinder pin emergency valve are all arranged on a telescopic arm of the crane, and the emergency switching valve and the cylinder arm pin emergency switching valve are all arranged on a rotary table of the crane.

The beneficial effects of the invention include:

this application is owing to set up emergent valves, when jar arm round pin diverter valve breaks down and not commutate, this application can get into emergent operating condition (only through jar round pin emergency valve or arm round pin emergency valve with control jar round pin hydro-cylinder or arm round pin hydro-cylinder promptly) by normal operating condition (communicate jar round pin emergency valve or arm round pin emergency valve with control jar round pin hydro-cylinder or arm round pin hydro-cylinder promptly through jar arm round pin diverter valve promptly), through jar round pin emergency valve or arm round pin emergency valve with respectively driving jar round pin hydro-cylinder or arm round pin hydro-cylinder and stretch out and draw back the action, thereby guarantee the normal plug action of jar round pin or arm round pin. Therefore, this application can realize when single cylinder bolt control system can be because of the sudden failure when the function is lost to jar arm round pin diverter valve, still can make jar round pin or arm round pin realize normal plug to guarantee the normal flexible of flexible arm, compare in prior art this application and improved the operation reliability of flexible arm.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a single cylinder deadbolt control system provided by the prior art;

FIG. 2 is a schematic diagram of a single cylinder deadbolt control system provided by an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating an emergency valve set entering an emergency operating state according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of an emergency extraction of an arm pin provided by an embodiment of the present invention;

fig. 5 is a schematic diagram of emergency extraction of a cylinder pin according to an embodiment of the present invention.

Icon: 100-single cylinder plug pin control system; 10-a telescopic oil cylinder; 20-cylinder pin oil cylinder; 30-arm pin cylinder; 41-cylinder pin emergency valve; 42-arm pin emergency valve; 50-cylinder arm pin switching valve; 51-a first oil port; 52-a second oil port; 53-third oil port; 60-emergency state switching valve; 70-cylinder arm pin emergency switching valve; 80-a pipeline retracting device; 90-control oil circuit; p-oil inlet oil way; t-oil return path.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 2, the embodiment provides a single-cylinder pin control system 100, which includes a telescopic cylinder 10, a cylinder pin cylinder 20, a boom pin cylinder 30, and an emergency valve set, which includes a cylinder pin emergency valve 41 and a boom pin emergency valve 42, wherein the cylinder pin emergency valve 41 is communicated with the cylinder pin cylinder 20, for controlling the cylinder pin cylinder 20 to drive the cylinder pin to do telescopic motion relative to the telescopic cylinder 10, the jib pin emergency valve 42 is communicated with the jib pin cylinder 30, the arm pin switching valve 50 comprises a first oil port 51, a second oil port 52 and a third oil port 53, the first oil port 51 is communicated with the telescopic oil cylinder 10, the second oil port 52 and the third oil port 53 are respectively communicated with the cylinder pin emergency valve 41 and the arm pin emergency valve 42, and the arm pin switching valve 50 can be communicated with the arm pin emergency valve 42 or the cylinder pin emergency valve 41.

When the single-cylinder pin control system 100 of the present application is in a normal operating state, the cylinder pin emergency valve 41 or the arm pin emergency valve 42 is communicated through the cylinder arm pin switching valve 50 to control the cylinder pin cylinder 20 or the arm pin cylinder 30, so that the cylinder pin is driven to perform a plugging and unplugging action relative to the cylinder pin hole under the driving of the cylinder pin cylinder 20, or the driving arm pin is driven to perform a plugging and unplugging action relative to the cylinder pin hole under the driving of the arm pin cylinder 30. It should be understood that in the present embodiment, the arm pin switching valve 50 is a two-position three-way valve, as oriented in fig. 2, and the arm pin cylinder 30 is communicated when the pressure oil source is turned on; when the pressure oil source is connected to the lower position, the cylinder pin cylinder 20 is connected.

When the cylinder arm pin switching valve 50 cannot be switched due to a fault, the single-cylinder pin control system 100 is required to enter an emergency working state, at the moment, the cylinder pin emergency valve 41 can be selectively pushed to be switched according to actual needs so that the cylinder pin emergency valve 41 enters the emergency state, and then a pressure oil source is connected to the cylinder pin emergency valve 41, so that the cylinder pin oil cylinder 20 is pushed to do telescopic motion, and the cylinder pin is driven to do inserting and pulling actions relative to a cylinder pin hole under the driving of the cylinder pin oil cylinder 20; or the arm pin emergency valve 42 is pushed to change the direction so that the arm pin emergency valve 42 enters an emergency state, and then a pressure oil source is connected to the arm pin emergency valve 42, so that the arm pin oil cylinder 30 is pushed to do telescopic motion, and the driving arm pin is driven by the arm pin oil cylinder 30 to do inserting and pulling motion relative to the arm pin hole.

It should be noted that, firstly, the single-cylinder pin type crane is a crane which realizes the telescopic function of the telescopic boom through the combined action of the boom pin, the cylinder pin and the telescopic cylinder 10. The telescopic principle is as follows: the extension mode of the single-cylinder bolt type telescopic arm is as follows: the telescopic oil cylinder 10 can be firstly locked with the penultimate knuckle arm, then the penultimate knuckle arm and the penultimate knuckle arm are released, and at the moment, the telescopic oil cylinder 10 can take the penultimate knuckle arm out; the penultimate knuckle arm is locked with the penultimate knuckle arm again after reaching the preset position, the telescopic oil cylinder 10 is retracted and locked with the penultimate knuckle arm, then the penultimate knuckle arm is unlocked with the penultimate knuckle arm, at the moment, the telescopic oil cylinder 10 can take out the penultimate knuckle arm, and the penultimate knuckle arm is locked with the penultimate knuckle arm again after reaching the preset position. And so on, all the telescopic arms can be extended out in sequence. Of course, at any time, any one telescopic boom is locked with other telescopic booms by either a boom pin or a cylinder pin and the telescopic cylinder 10. It should be understood that in the present embodiment, the structures of the telescopic cylinder 10, the cylinder pin cylinder 20, and the boom pin cylinder 30 and the arrangement positions on the telescopic boom can be selected by those skilled in the art according to the prior art, and the detailed description of the present application is omitted.

Secondly, in this embodiment, the cylinder-arm pin switching valve 50 is a two-position three-way electromagnetic switching valve, and the cylinder-arm pin switching valve 50 can be selectively communicated with the cylinder pin emergency valve 41 or the arm pin emergency valve 42, so as to be respectively communicated with the cylinder pin cylinder 20 or the arm pin cylinder 30 through the cylinder pin emergency valve 41 or the arm pin emergency valve 42, so as to supply oil to the cylinder pin cylinder 20, thereby driving the cylinder pin of the cylinder pin cylinder 20 to perform inserting and pulling actions relative to the cylinder pin hole of a certain section of arm; or the oil is supplied to the arm pin cylinder 30 to drive the arm pin of the arm pin cylinder 30 to perform the insertion and extraction motion relative to the arm pin hole of a certain section of arm.

Thirdly, the emergency valve bank that this application set up is in order to prevent when the cylinder arm round pin switch valve 50 leads to the condition of loss of function because of the trouble to guarantee that telescopic boom can normally stretch out and draw back or retrieve. For example, in the present embodiment, the cylinder arm pin switching valve 50 may initiate the emergency operation state when the following fault occurs, for example: the non-reversing or non-resetting caused by the clamping of the cylinder arm pin switching valve 50, the non-reversing caused by the interruption of an electric control signal of the cylinder arm pin switching valve 50, the non-reversing caused by the damage and the breakage of a coil of the cylinder arm pin switching valve 50, the non-reversing caused by the damage and the pressure relief of a core tube of the telescopic oil cylinder 10 and the like.

Fourthly, the emergency valve group comprises a cylinder pin emergency valve 41 and an arm pin emergency valve 42, wherein the cylinder pin emergency valve 41 is communicated between the cylinder arm pin switching valve 50 and the cylinder pin oil cylinder 20, and the arm pin emergency valve 42 is communicated between the cylinder arm pin switching valve 50 and the arm pin oil cylinder 30. Thus, when the cylinder and arm pin switching valve 50 loses function, the present application can automatically control the oil supply of the cylinder pin cylinder 20 or the arm pin cylinder 30 through the cylinder pin emergency valve 41 or the arm pin emergency valve 42, so as to ensure the normal telescopic movement of the cylinder pin or the arm pin. It should be understood that in the present embodiment, the cylinder pin emergency valve 41 and the arm pin emergency valve 42 can be connected to a pressure oil source for oil supply, and the oil supply manner of the cylinder pin emergency valve 41 and the arm pin emergency valve 42 can be implemented by those skilled in the art by using the prior art, and the detailed description of the present embodiment is omitted.

In summary, due to the emergency valve set including the cylinder pin emergency valve 41 and the arm pin emergency valve 42, in a normal working state (i.e. when the cylinder arm pin switching valve 50 of the present application can work normally), the cylinder arm pin switching valve 50 is selectively communicated with the cylinder pin emergency valve 41, at this time, the arm pin emergency valve 42 is closed, and the cylinder arm pin switching valve 50 supplies oil to the cylinder pin oil cylinder 20 through the cylinder pin emergency valve 41, so as to drive the cylinder pin oil cylinder 20 to perform telescopic motion, so that the cylinder pin is inserted into and pulled out from the cylinder pin hole of a certain section of arm; alternatively, the cylinder/arm pin switching valve 50 selectively communicates with the arm pin emergency valve 42, the cylinder/arm pin emergency valve 41 is closed, and the cylinder/arm pin switching valve 50 supplies oil to the arm pin cylinder 30 through the arm pin emergency valve 42, thereby driving the arm pin cylinder 30 to perform a telescopic motion so as to insert and remove the arm pin from and from the arm pin hole of a certain arm. In an emergency working state (i.e. when the cylinder arm pin switching valve 50 of the present application is out of function for some reason and is not reversed), the cylinder arm pin switching valve 50 is not communicated with the arm pin emergency valve 42 or the cylinder pin emergency valve 41 (i.e. the cylinder arm pin switching valve 50 is stopped from the normal working state of the emergency valve bank), at this time, the cylinder pin emergency valve 41 or the arm pin emergency valve 42 of the emergency valve bank can automatically supply oil as required, so that the cylinder pin oil cylinder 20 or the arm pin oil cylinder 30 is ensured to normally extend and retract to respectively drive the cylinder pin or the arm pin to perform plugging and unplugging actions. Owing to set up emergent valves, when cylinder arm round pin diverter valve 50 breaks down and not commutate, this application can get into emergent operating condition, through jar round pin emergency valve 41 or arm round pin emergency valve 42 with respectively driving cylinder round pin hydro-cylinder 20 or arm round pin hydro-cylinder 30 and carry out the action of stretching out and drawing back to guarantee the normal plug action of jar round pin or arm round pin. Therefore, this application can realize when single cylinder bolt control system 100 can be because of the sudden failure when losing function at jar arm round pin diverter valve 50, still can make jar round pin or arm round pin realize normal plug to guarantee the normal flexible of flexible arm, compare in prior art this application and improved the operation reliability of flexible arm.

In the present embodiment, the cylinder arm pin switching valve 50 is an electromagnetic switching valve. In order to prevent the cylinder arm pin switching valve 50 from being out of order due to internal circuit and electric signal interference, etc., when the cylinder arm pin switching valve 50 fails and does not change direction, the cylinder pin emergency valve 41 and the arm pin emergency valve 42 of the emergency valve bank also cause interference, which causes the emergency valve bank to also have a direction change failure, in this embodiment, the cylinder pin emergency valve 41 and the arm pin emergency valve 42 of the emergency valve bank are hydraulic switching valves.

The single-cylinder latch control system 100 provided by the embodiment further includes an emergency state switching valve 60, and the emergency state switching valve 60 is respectively communicated with the arm pin emergency valve 42 and the cylinder pin emergency valve 41 and used for controlling the opening or closing of the emergency valve group. This application is owing to set up emergency state switch valve 60, when single cylinder bolt control system 100 need get into emergency operation state, only need control emergency state switch valve 60 alright with corresponding control cylinder round pin emergency valve 41 or arm round pin emergency valve 42 in order to get into emergency operation state, compare in the independent control operation of cylinder round pin emergency valve 41 and arm round pin emergency valve 42, this embodiment can reduce the operating procedure, and only need connect a pressure oil source control emergency state switch valve 60 can, need not connect the pressure oil source for cylinder round pin emergency valve 41 and arm round pin emergency valve 42 alone and supply oil so that cylinder round pin hydro-cylinder 20 or arm round pin hydro-cylinder 30 switch to emergency state from normal operating condition, to a certain extent, single cylinder bolt control system 100's compact structure has also been improved.

In order to facilitate the oil supply of the emergency cylinder pin valve and the emergency arm pin valve, so that the emergency cylinder pin valve is communicated with the cylinder pin cylinder 20, or the emergency arm pin valve is communicated with the arm pin, in this embodiment, the single cylinder pin control system 100 further includes a cylinder arm pin emergency switching valve 70, and the cylinder arm pin emergency switching valve 70 is respectively communicated with the arm pin emergency valve 42 and the cylinder pin emergency valve 41, and is used for communicating the arm pin emergency valve 42 to control the arm pin cylinder 30 to drive the arm pin to perform the telescopic motion, or is used for communicating the cylinder pin emergency valve 41 to control the cylinder pin cylinder 20 to drive the cylinder pin to perform the telescopic motion. Thus, when the single-cylinder latch control system 100 is in the emergency operation state, the embodiment can selectively control the communication of the cylinder pin emergency valve 41 or the communication of the boom pin emergency valve 42 only by controlling the cylinder and boom pin emergency switching valve 70, so as to implement the telescopic motion of the cylinder pin cylinder 20 or the telescopic motion of the boom pin cylinder 30. Compared with the prior art, the emergency switching valve 70 of the arm pin of the control cylinder of the single-cylinder bolt only needs to be connected, and the cylinder pin emergency valve 41 and the arm pin emergency valve 42 do not need to be separately connected with the pressure oil source for oil supply so as to enable the cylinder pin oil cylinder 20 to be communicated or the arm pin oil cylinder 30 to be communicated, so that the structural compactness of the single-cylinder bolt control system 100 is improved to a certain extent.

In the present embodiment, the emergency state switching valve 60 and the cylinder arm pin emergency switching valve 70 are both electromagnetic switching valves. Thus, compared to a hydraulic valve, a portion of the oil line may be eliminated, and the cleanliness of the single cylinder pin control system 100 may be improved to some extent. Of course, it should be noted that the electromagnetic switching valve is only one embodiment of the present application, and a manual hydraulic valve may be selected in other embodiments, and a person skilled in the art may select the valve according to actual situations.

In order to enable the hydraulic hoses on the control oil path 90 to be orderly discharged, so as to improve the cleanliness of the hydraulic hoses and reduce the working strength of the pipeline discharge of workers to a certain extent, in the embodiment, the single-cylinder plug pin control system 100 further includes a pipeline retracting device 80 connected to the control oil path 90, and the pipeline retracting device 80 is used for retracting the hydraulic hoses on the control oil path 90.

For example, the pipe reeling and unreeling device 80 may be a hose reel that may be provided on the control oil passage 90 between the emergency valve bank and the emergency state switching valve 60 and the cylinder arm pin switching valve 50. See also fig. 2 for a combination.

The working principle of the single-cylinder bolt control system 100 provided by the embodiment is as follows:

referring to fig. 2 again, when the single-cylinder pin control system 100 provided in this embodiment is in a normal operating state, at this time, the arm pin switching valve 50 is selectively communicated with the second oil port 52 or the third oil port 53, when the arm pin switching valve 50 is communicated with the second oil port 52, the arm pin switching valve 50 is communicated with the cylinder pin emergency valve 41, the arm pin switching valve 50 supplies oil to the cylinder pin emergency valve 41, and the cylinder pin emergency valve 41 supplies oil to the cylinder pin cylinder 20, so as to drive the cylinder pin cylinder 20 to perform a telescopic motion, thereby driving the cylinder pin to perform an inserting and pulling motion with respect to a cylinder pin hole of a certain joint arm, so as to lock or release the cylinder pin with respect to the cylinder pin hole; when the arm pin switching valve 50 is communicated with the third oil port 53, the arm pin switching valve 50 is communicated with the arm pin emergency valve 42, the arm pin switching valve 50 supplies oil to the arm pin emergency valve 42, and the arm pin emergency valve 42 supplies oil to the arm pin oil cylinder 30, so that the arm pin oil cylinder 30 is driven to perform telescopic motion, the arm pin is driven to perform plugging and unplugging actions relative to an arm pin hole of a certain section of arm, and the arm pin is locked or released relative to the arm pin hole.

Referring to fig. 3, when the single-cylinder latch control system 100 provided in this embodiment enters the emergency operating state, the pressure oil source supplies oil to the emergency state switching valve 60 through the oil inlet path P, and the emergency state switching valve 60 selectively communicates with the cylinder pin emergency valve 41 or the arm pin emergency valve 42, so as to push the cylinder pin emergency valve 41 or the arm pin emergency valve 42 to change directions, so as to enter the cylinder pin emergency state or the arm pin emergency state.

Referring to fig. 4, when the single-cylinder pin control system 100 provided in this embodiment enters an emergency operating state and the arm pin needs to be inserted and pulled emergently, the pressure oil source supplies oil to the cylinder-arm pin emergency switching valve 70 through the oil inlet passage P, then supplies oil to the arm pin emergency valve 42, and supplies oil to the arm pin oil cylinder 30 through the arm pin emergency valve 42, so as to drive the arm pin oil cylinder 30 to perform telescopic motion, and drive the arm pin to be inserted and pulled with respect to the arm pin hole of a certain section of arm, so that the arm pin is locked or released with respect to the arm pin hole.

Referring to fig. 5, when the single-cylinder pin control system 100 provided in this embodiment enters an emergency operating state and the cylinder pin needs to be inserted and pulled emergently, the pressure oil source supplies oil to the arm pin emergency switching valve 70 through the oil inlet passage P, then supplies oil to the cylinder pin emergency valve 41, and supplies oil to the cylinder pin cylinder 20 through the cylinder pin emergency valve 41, so as to drive the cylinder pin cylinder 20 to perform telescopic motion, and drive the cylinder pin to be inserted and pulled with respect to the cylinder pin hole of a certain arm, so as to lock or release the cylinder pin with respect to the cylinder pin hole.

It should be noted that, firstly, the operation principle of the present embodiment is described in the case that the emergency state switching valve 60 and the cylinder arm pin emergency switching valve 70 are electromagnetic switching valves, and the cylinder pin emergency valve 41 and the arm pin emergency valve 42 are hydraulic valves, when the valves are selected from other types, those skilled in the art can deduce the valves according to the characteristics of the different valves, and details are not repeated.

Secondly, each oil inlet is connected to a pressure oil source (such as an oil pump) through an oil inlet path P, and an oil return port is connected to an oil tank through an oil return path T.

The present embodiment also provides a telescoping arm that utilizes the single cylinder latch control system 100 described above. Since the detailed connection structure of the single cylinder latch control system 100 and the advantages thereof have been explained in detail in the foregoing, they are not described in detail herein.

This embodiment provides a hoist again, and this hoist has adopted foretell telescopic boom. The telescopic boom further includes an emergency state switching valve 60 communicating with the boom pin emergency valve 42 and the cylinder pin emergency valve 41, respectively, and a cylinder boom pin emergency switching valve 70 communicating with the boom pin emergency valve 42 and the cylinder pin emergency valve 41, respectively. The emergency switching valve 60 and the cylinder arm pin emergency switching valve 70 are both electromagnetic switching valves, the cylinder arm pin switching valve 50, the arm pin emergency valve 42, and the cylinder pin emergency valve 41 are all provided on the telescopic arm of the crane, and the emergency switching valve 60 and the cylinder arm pin emergency switching valve 70 are all provided on the rotary table of the crane.

It should be noted that, compared to the hydraulic valve, the electromagnetic switching valve can omit part of the oil line, and can improve the cleanliness of the single-cylinder plug pin control system 100 to a certain extent. Meanwhile, the emergency state switching valve 60 and the cylinder arm pin switching valve 50 are arranged on the rotary table, so that the single-cylinder bolt control system 100 of the crane is prevented from being failed in an emergency when a cable line in the telescopic arm fails. The emergency state switching valve 60 and the cylinder arm pin switching valve 50 are provided on the turntable, which can improve the reliability of the emergency system of the present embodiment to some extent.

The above description is only an alternative embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.