WO2024021300A1

WO2024021300A1 - Cantilever support and work machine

Info

Publication number: WO2024021300A1
Application number: PCT/CN2022/122506
Authority: WO
Inventors: 胡磊; 房燕涛; 谢世聪; 曾斌
Original assignee: 三一汽车制造有限公司
Priority date: 2022-07-28
Filing date: 2022-09-29
Publication date: 2024-02-01
Also published as: CN115321389A

Abstract

A cantilever support and a work machine. The cantilever support comprises a telescopic cantilever (100), a first valve set (102) and an emergency pipeline (201), wherein the telescopic cantilever (100) comprises an inner cavity (101); the first valve set (102) is configured to be connected to an executing element of a spreading cantilever section set (130); the emergency pipeline (201) is arranged in the inner cavity (101), and one end of the emergency pipeline (201) is connected to the first valve set (102), and the other end of the emergency pipeline (201) is suspended. In order to overcome the defect that in the prior art, under the extreme condition of no electricity, the cantilever support cannot be withdrawn, according to the cantilever support, an emergency pipeline (201) is connected to a first valve set (102), the emergency pipeline (201) is arranged in an inner cavity (101) of a telescopic cantilever (100), and under the extreme state of no electricity, etc., the emergency pipeline (201) is connected to an emergency hydraulic system, so that a spreading cantilever section set is withdrawn, and the reliability of emergency withdrawing of a cantilever support is improved.

Description

Booms and operating machinery

Cross-references to related applications

This application claims priority to the Chinese patent application with application number 2022109017892 and the invention title "Boom and Working Machinery" submitted on July 28, 2022, which is fully incorporated herein by reference.

Technical field

This application relates to the technical field of emergency operations, and in particular to a boom and operating machinery.

Background technique

At present, in operating machinery with a boom, such as fire trucks, aerial vehicles, etc., when the operating machinery fails, for example, the power system cannot achieve power output, in order to avoid the danger of accidental falling of the boom, etc., emergency response equipment is required. The power unit performs emergency retraction of the boom.

The existing emergency power device is to add another set of auxiliary hydraulic power systems to the main hydraulic power system to cope with the failure of the main hydraulic power system. However, this kind of emergency power device still has the disadvantage that it cannot be started when there is no power. Especially for the arm joints in the boom that are far away from the ground, the retraction action cannot be completed in the extreme power-free state.

Contents of the invention

This application provides a boom and operating machinery to solve the problem in the prior art that the boom cannot be recovered under extreme conditions without electricity. By setting a first valve group, it is used to control the recovery of the extension arm section group. An emergency pipeline connected to the first valve group is provided in the inner cavity of the telescopic arm to realize emergency control of the first valve group in extreme situations such as no power, thereby controlling the recovery of the extension arm section group.

This application provides an arm, including:

A telescopic arm, one end of the telescopic arm is used to connect to the turntable, and the other end of the telescopic arm is used to connect to the extension arm segment group, the telescopic arm includes an inner cavity;

A first valve group, the first valve group is used to connect with the actuator of the extension arm section group;

Emergency pipe, the emergency pipe is placed in the inner cavity, one end of the emergency pipe is connected to the first valve group, and the other end of the emergency pipe is suspended.

According to the boom provided by this application, the first valve group is installed in the inner cavity, and the emergency pipe is connected to the pilot port of the first valve group.

According to the boom provided by this application, a suspended end of the emergency pipe is provided with a quick-plug joint, and the quick-plug joint is used to connect to the emergency hydraulic system.

According to the boom provided by the present application, it further includes a one-way valve, the oil inlet of the one-way valve is connected to the emergency pipeline, and the oil outlet of the one-way valve is connected to the first valve group.

According to the boom provided by the present application, the telescopic arm includes an inner tube and an extension tube, and the extension tube is sleeved outside the inner tube and telescopes relative to the inner tube;

Wherein, the inner cylinder is formed with an inner cavity, and the emergency pipe is connected to the side wall of the inner cylinder.

According to the boom provided by the present application, one suspended end of the emergency pipe extends to an end of the inner cylinder away from the first valve group.

The boom provided according to the present application also includes the turntable and the extension arm section group. One end of the telescopic arm is rotatably connected to the turntable, and the other end of the telescopic arm is rotatably connected to the extension arm section group. Turn the connection.

According to the boom provided by the present application, the extension arm section group includes a plurality of arm sections that are rotatably connected in sequence, and the plurality of arm sections are provided with a plurality of actuators, and the plurality of actuators are connected to the third One valve group connection.

The boom provided by the present application further includes a second valve group for connecting with the actuator of the telescopic arm. The second valve group is installed on the telescopic arm close to the turntable. One side or the second valve group is installed on the turntable.

This application also provides a working machine, including the above-mentioned boom.

The boom provided by this application is provided with a first valve group in the inner cavity of one end of the telescopic arm close to the extension arm section group. The first valve group is used to control the expansion and contraction of the extension arm section group; an emergency response is connected to the first valve group The emergency pipeline is placed in the inner cavity of the telescopic arm. In extreme conditions such as no power, the emergency pipeline is connected to the emergency hydraulic system to realize the recovery of the extension arm section group and improve the reliability of the emergency recovery boom.

Furthermore, since the working machine provided in the present application is provided with the boom as mentioned above, it also has various advantages as mentioned above.

Description of drawings

In order to explain the technical solutions in this application or the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are of the present invention. For some embodiments of the application, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of the boom in the retracted state of the telescopic arm provided by this application;

Figure 2 is a schematic structural diagram of the boom in the extended state of the telescopic arm provided by this application;

Figure 3 is a schematic diagram of the emergency hydraulic system provided by this application.

Reference signs:

100: telescopic arm; 101: inner cavity; 102: first valve group;

103: Second valve group; 201: Emergency pipeline; 110: Turntable;

111: The first oil cylinder; 112: Extension cylinder; 113: Inner cylinder;

120: Original hydraulic system; 130: Extension arm section group; 131: Second oil cylinder;

132: The first arm section; 133: The second arm section; 134: The third oil cylinder;

200: Emergency pump; 202: First reversing valve; 203: Emergency one-way valve;

204: Pilot port; 205: First oil inlet; 206: First oil outlet;

207: Second reversing valve; 208: Fuel tank.

Detailed ways

In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application. , not all examples. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top" ", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying The devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as limiting the embodiments of the present application. Furthermore, the terms “first”, “second” and “third” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Or integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood in specific situations.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the embodiments of this application. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

Embodiments of the present application will be described below with reference to FIGS. 1 to 3 . It should be understood that the following descriptions are only illustrative embodiments of the present application and do not limit the present application.

As shown in Figure 1, the present application provides a boom, including: a telescopic arm 100, a first valve group 102 and an emergency pipe 201 placed in the telescopic arm 100, wherein one end of the telescopic arm 100 is used to communicate with the turntable 110 The other end of the telescopic arm 100 is used to connect with the extension arm section group 130. The telescopic arm 100 includes an inner cavity 101; that is, the telescopic arm 100 is placed at the end of the boom, closer to the ground. The first valve group 102 is installed in the inner cavity 101. The first valve group 102 is used to connect with the actuator of the extension arm section group 130; that is to say, the first valve group 102 is used to control the extension state of the extension arm section group 130. . The emergency pipe 201 is placed in the inner cavity 101, one end of the emergency pipe 201 is connected to the first valve group 102, and the other end of the emergency pipe 201 is suspended. In other words, the emergency pipeline 201 connects the first valve group 102 with the emergency hydraulic system in an emergency state, so as to realize emergency retraction of the extension arm section group by controlling the first valve group 102 .

Specifically, in the working machine, the telescopic arm 100 of the boom close to the ground can complete the fall by its own weight. In an emergency, the arm retracting action is mainly performed on the arm sections of the boom far away from the ground. When the working machine is powered off, manually connecting the emergency hydraulic system is a more reliable operation method. Therefore, an emergency pipe 201 is reserved in the inner cavity 101 of the telescopic arm 100. After the telescopic arm 100 completes retraction by its own weight, The emergency pipe 201 is placed at the end of the telescopic arm 100. By manually connecting the emergency pipe 201 with the emergency hydraulic system, the recovery action of the extension arm section group 130 in the boom that is far away from the ground is realized. The structure is simple and reliable, and the boom can be completed in extreme situations. of recycling.

Among them, for the first valve group 102 of the present application, the control valve group of the existing boom is entirely disposed at the end of the telescopic arm 100 or on the turntable 110 of the boom. However, due to the boom extension action of the multi-arm section Complex, there are many pipelines, and the pipelines need to pass through the telescopic arm 100 to reach other arm sections, resulting in many pipelines on the telescopic arm 100, heavy weight, and limited internal space of the telescopic arm 100. Due to the weight and structural space of the pipeline transportation structure, the The number of pipelines increases and multiplies, making the installation and maintenance of pipelines and pipeline transportation structures more difficult. For related technologies that use electrical emergency methods, they cannot meet the emergency recovery function under the most extreme working conditions, reducing the reliability of the use of operating machinery.

Therefore, the first valve group 102 of the extension arm section group 130 of the boom is provided separately from the second valve group 103 of the telescopic arm 100 , and the first valve group 102 is placed at one end of the telescopic arm 100 close to the extension arm section group 130 That is, the head end of the telescopic arm 100 reduces the number of pipelines and pipeline transportation structures in the telescopic arm 100, thereby reducing the weight of the telescopic arm 100 and facilitating the installation and maintenance of the pipelines and pipeline transportation structures.

Further, in some embodiments of the present application, the boom also includes a second valve group 103. The second valve group 103 is used to connect with the actuator of the telescopic arm 100, for example, through a pipeline connection. The second valve group 103 is installed on The side of the telescopic arm 100 close to the turntable 110 or the second valve group 103 is installed on the turntable 110 .

Specifically, an actuator for telescopic arm 100 is provided inside the telescopic arm 100 , and an actuator for varying the amplitude of the telescopic arm 100 is provided outside the telescopic arm 100 . The second valve group 103 is used to control the action of the telescopic actuator. Used to control the actuator action of the amplitude. The installation position of the second valve group 103 is close to the ground. When the working machine is in an emergency state, the operator can easily manually operate the second valve group 103 and perform emergency arm retraction processing.

As shown in Figure 2, in one embodiment of the present application, for the telescopic arm 100, the telescopic arm 100 includes an inner cylinder 113 and an extension tube 112. The extension tube 112 is sleeved outside the inner tube 113 and relative to the inner tube. 113 telescopic; wherein, the inner cylinder 113 is formed with an inner cavity 101, and the emergency pipe 201 is connected to the side wall of the inner cylinder 113. For example, the telescopic arm 100 adopts a box-shaped structure, and the interior of the telescopic arm 100 is hollow. Therefore, the emergency pipe 201 can be arranged along the inner barrel 113 of the telescopic arm 100, or the emergency pipe 201 can be arranged on the internal cylinder tube and extend to the telescopic arm 100. The bottom end of arm 100.

That is to say, the telescopic arm 100 includes a plurality of telescopic sections, and the plurality of telescopic sections are telescoped through actuators. For example, the telescopic arm 100 includes an extension tube 112 and an inner tube 113. One end of the extension tube 112 is connected to the turntable 110, and the extension tube 112 The other end is connected to one end of the inner cylinder 113 through the actuator. The inner cylinder 113 is provided with a first valve group 102. The first valve group 102 is connected to the emergency pipeline 201. The emergency pipeline 201 passes through the clamping piece along the length direction of the emergency pipeline 201. Connected to the side wall of the inner cylinder 113. When the extension tube 112 and the inner tube 113 of the telescopic arm 100 are relatively extended and contracted, there is no relative movement between the emergency pipe 201 and the telescopic arm 100 .

In addition, in some embodiments of the present application, the emergency pipeline 201 can be arranged along the cylinder barrel of the oil cylinder, which is the actuator inside the telescopic arm 100 for telescopic extension tube 112 and the inner cylinder 113. The emergency pipeline 201 and the oil cylinder cylinder There is no relative movement of the cylinder, and the emergency pipe 201 extends along the cylinder barrel to the end of the telescopic arm 100. And the end of the telescopic arm 100 can reach a place close to the bottom, so emergency operation can be performed manually, and the emergency pipeline 201 is connected to the pilot oil line of the first valve group 102, which can be used to open the valve of the first valve group 102.

Of course, the telescopic arm 100 may include multiple telescopic tubes, and the multiple telescopic tubes are sleeved with each other and connected through actuators to achieve telescopicity, thereby achieving the elongation of the telescopic arm 100 . Multiple actuators are connected to the second valve group 103 through pipelines, and the actuators may be hydraulic cylinders. Among them, after the working machine fails, the second valve group 103 is controlled manually or by an external power source to change direction, so that the actuator of the telescopic arm 100 is unloaded, so that the extension tube 112 and the inner tube 113 of the telescopic arm 100 can be passed through under their own weight. Take back. At this time, the emergency pipe 201 is placed at the end of the telescopic arm 100 to facilitate connection with the emergency hydraulic system and to control the retraction of actuators of other extension arm segments 130 such as hydraulic cylinders.

As shown in Figures 2 and 3, in another embodiment of the present application, the emergency pipeline 201 is connected to the pilot port 204 of the first valve group 102. For example, the first valve group 102 is a hydraulically controlled pilot valve group, and the pilot port 204 of the hydraulically controlled pilot valve group can be connected to the original hydraulic system 120 and the emergency hydraulic system simultaneously through a three-way valve. When the original hydraulic system 120 of the working machine fails, the pilot port 204 of the first valve group 102 is connected to the emergency hydraulic system to realize the direction change of the first valve group 102 and thereby control the actuators of the extension arm section group 130 , to realize the retraction of the extension arm section group 130.

Among them, the first oil inlet 205 and the first oil outlet 206 of the first valve group 102 are also connected to the emergency hydraulic system at the same time. The pipes of the first oil inlet 205 and the first oil outlet 206 of the first valve group 102 The pipeline does not need to be connected in the inner cavity 101 of the telescopic arm 100 through a three-way valve alone. The oil inlet and oil outlet of the first valve group 102 and the second valve group 103 are respectively connected. Therefore, the oil inlet and oil outlet of the second valve group 103 can be connected to the emergency hydraulic system to realize the oil inlet and oil return of the first valve group 102.

Further, as shown in Figure 3, the emergency hydraulic system includes an emergency pump 200, a first reversing valve 202, a second reversing valve and an emergency check valve 203. The emergency pump 200 outputs hydraulic oil to the first reversing valve 202, The first reversing valve 202 is connected to the emergency one-way valve 203. The output port of the emergency one-way valve 203 is connected to the emergency pipeline 201 and the second reversing valve respectively. The second reversing valve is connected to the first inlet of the first valve group 102. The oil port 205 is connected to the first oil outlet 206.

The emergency pump 200 provides hydraulic power, and supplies hydraulic oil to the pilot port 204 of the first valve group 102 through the first reversing valve 202. The first oil inlet 205 or the first oil outlet 206 of a valve group 102 supplies oil, and the switching of the working position of the second reversing valve causes the first oil inlet 205 and the first oil outlet of the first valve group 102 to One of the first oil inlet 206 and the first oil outlet 206 is connected to the emergency pump 200, and the other of the first oil inlet 205 and the first oil outlet 206 is connected to the oil tank 208, so that the arm sections of the extension arm section group 130 are recovered.

The first valve group 102 has a plurality of pilot valves, and the plurality of pilot ports 204 of the plurality of pilot valves are respectively connected to the plurality of emergency pipelines 201 in a one-to-one correspondence. According to the retraction needs or the retraction sequence of the arm sections in the extension arm section group 130, multiple emergency pipes 201 can be selectively connected to the first reversing valve 202 to realize the sequential recovery of multiple arm sections.

Specifically, in other embodiments of the present application, one suspended end of the emergency pipe 201 is provided with a quick-plug joint, and the quick-plug joint is used to connect to the emergency hydraulic system. The quick-connect connector can be connected to the emergency hydraulic system manually, electrically, hydraulically or by other means. The quick-connect connector is automatically closed when not in use, which can effectively seal the oil circuit and improve safety and reliability. That is to say, to prevent the problem of hydraulic oil flowing out when the emergency pipe 201 is not in use, a quick-plug joint is provided at the end of the emergency pipe 201. On the one hand, the hydraulic oil in the emergency pipe 201 can be sealed, and on the other hand, it is convenient to The emergency pipeline 201 is quickly connected to the oil inlet of the emergency one-way valve 203 of the emergency hydraulic system. That is to say, a female head matching the quick connector is also provided at the end where the emergency one-way valve 203 of the emergency hydraulic system is connected to the emergency pipe 201 to facilitate quick plug connection.

In addition, in other embodiments of the present application, the boom also includes a one-way valve, the oil inlet of the one-way valve is connected to the emergency pipeline 201 , and the oil outlet of the one-way valve is connected to the first valve group 102 . In other words, a one-way valve is provided between the first valve group 102 and the emergency pipeline 201. The one-way valve is used to cut off the flow of hydraulic oil from the first valve group 102 to the emergency hydraulic system to prevent the failure of the emergency pipeline 201 from causing the first valve to fail. Failure of group 102.

Among them, the first valve group 102 includes a one-way valve provided at the pilot port 204, the first oil inlet 205 and the first oil outlet 206. The one-way valve is used to cut off the pilot port 204 and the first oil outlet 206 of the first valve group 102. The first oil inlet 205 and the first oil outlet 206 flow to the hydraulic oil of the emergency hydraulic system to prevent the pipeline failure of the pilot port 204, the first oil inlet 205 and the first oil outlet 206 of the first valve group 102, causing the first valve group 102 to fail.

Regarding the emergency pipe 201 of the present application, in one embodiment of the present application, a suspended end of the emergency pipe 201 extends to an end of the inner cylinder 113 away from the first valve group 102 . In other words, when the telescopic arm 100 is fully retracted, one end of the quick-connect connector of the emergency pipe 201 should be placed at the end of the telescopic arm 100 so that the emergency pipe 201 can be quickly connected to the emergency hydraulic system in an emergency state.

For example, the first valve group 102 is installed on the top of the inner cylinder 113 , and the length of the emergency pipe 201 can be greater than the length of the inner cylinder 113 and extend out of the bottom of the inner cylinder 113 . For another example, the first valve group 102 is installed in the middle and upper part of the inner cylinder 113. The length of the emergency pipe 201 can be shorter than the length of the inner cylinder 113, but the quick-connect connector end of the emergency pipe 201 is the suspended end and still extends to the inner cylinder. The bottom of the barrel 113.

As shown in Figures 1 and 2, in one embodiment of the present application, the boom also includes a turntable 110 and an extension arm section group 130. One end of the telescopic arm 100 is rotatably connected to the turntable 110, and the other end of the telescopic arm 100 is connected to the turntable 110. The extension arm section group 130 is rotatably connected.

Among them, the turntable 110 is rotatably connected to the frame of the working machine to drive the boom to rotate. A first oil cylinder 111 is provided between the turntable 110 and the telescopic arm 100. The first oil cylinder 111 is controlled by the second valve group 103 to control the relative angle between the turntable 110 and the telescopic arm 100. A second oil cylinder 131 is provided between the telescopic arm 100 and the extension arm section group 130. The second oil cylinder 131 is used to control the relative angle between the telescopic arm 100 and the extension arm section group 130. The second oil cylinder 131 is controlled by the first valve group 102. .

More specifically, the turntable 110 is hingedly connected to the telescopic tube of the telescopic arm 100, and the inner tube 113 of the telescopic arm 100 is hingedly connected to the arm sections of the extending arm section group.

1, regarding the extension arm section group 130 of the present application, in a specific embodiment of the present application, the extension arm section group 130 includes a plurality of arm sections that are rotatably connected in sequence. The plurality of arm sections Multiple actuators are provided, and the multiple actuators are connected to the first valve group 102, for example, through pipelines.

For example, the extension arm section group 130 includes a first arm section 132, a second arm section 133, and a third arm section. One end of the first arm section 132 is rotatably connected to the telescopic arm 100, and one end of the second arm section 133 is connected to the first arm section. The other end of the section 132 is rotatably connected, and one end of the third arm section is rotatably connected to the other end of the second arm section 133 . A second oil cylinder 131 is provided between the first arm section 132 and the telescopic arm 100. A third oil cylinder 134 is provided between the second arm section 133 and the first arm section 132. There is a third oil cylinder 134 between the third arm section and the second arm section 133. A fourth oil cylinder is provided.

Among them, the second oil cylinder 131, the third oil cylinder 134 and the fourth oil cylinder are all connected with the first valve group 102 through pipelines. The first valve group 102 controls the extension and extension of the second oil cylinder 131, the third oil cylinder 134 and the fourth oil cylinder respectively. retract. Of course, the number of arm sections and oil cylinders in the extension arm section group 130 is not limited to the above examples, and may be more than three or less than three.

The present application provides a working machine, including the boom in the above embodiment. The working machinery may be engineering machinery such as a crane, excavator, pile driver, etc., or engineering vehicles such as an aerial vehicle, a fire truck, a mixer truck, etc.

The boom provided by this application is provided with a first valve group 102 in the inner cavity 101 of one end of the telescopic arm 100 close to the extension arm section group 130. The first valve group 102 is used to control the telescopic extension of the extension arm section group 130; in the first A valve group 102 is connected to an emergency pipeline 201. The emergency pipeline 201 is placed in the inner cavity 101 of the telescopic arm 100. In extreme conditions such as no power, the emergency pipeline 201 is connected to the emergency hydraulic system to realize the recovery of the extension arm section group 130. Improve the reliability of the emergency recovery boom; at the same time, placing the first valve group 102 on the top of the telescopic arm 100 effectively avoids excessive pipelines from being routed through the inner cavity 101 of the telescopic arm 100, reducing the weight of the telescopic arm 100. At the same time, It also facilitates the installation, wiring and maintenance of the first valve group 102 and reduces the failure rate.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims

A boom including:

Telescopic arm (100), one end of the telescopic arm (100) is used to connect to the turntable (110), and the other end of the telescopic arm (100) is used to connect to the extension arm section group (130). The telescopic arm (100) (100) includes inner cavity (101);

A first valve group (102), the first valve group (102) is used to connect with the actuator of the extension arm section group (130);

Emergency pipe (201), the emergency pipe (201) is placed in the inner cavity (101), one end of the emergency pipe (201) is connected to the first valve group (102), the emergency pipe (201) 201) is suspended at the other end.
The boom according to claim 1, wherein the first valve group (102) is installed in the inner cavity (101), and the connection between the emergency pipeline (201) and the first valve group (102) The pilot port (204) is connected.
The boom according to claim 1, wherein one suspended end of the emergency pipe (201) is provided with a quick-plug joint, and the quick-plug joint is used to connect with the emergency hydraulic system.
The boom according to claim 1, further comprising a one-way valve, an oil inlet of the one-way valve is connected to the emergency pipeline (201), and an oil outlet of the one-way valve is connected to the first valve. Group(102) connection.
The boom according to any one of claims 1 to 4, wherein the telescopic arm (100) includes an inner tube (113) and an extension tube (112), and the extension tube (112) is sleeved on the Outside the inner cylinder (113), and telescopic with respect to the inner cylinder (113);

Wherein, the inner cylinder (113) is formed with an inner cavity (101), and the emergency pipe (201) is connected to the side wall of the inner cylinder (113).
The boom according to claim 5, wherein a suspended end of the emergency pipe (201) extends to an end of the inner barrel (113) away from the first valve group (102).
The boom according to any one of claims 1 to 4, further comprising the turntable (110) and the extension arm section group (130), one end of the telescopic arm (100) and the turntable (110) ) is rotatably connected, and the other end of the telescopic arm (100) is rotatably connected to the extension arm section group (130).
The boom according to claim 7, wherein the extension arm section group (130) includes a plurality of arm sections that are rotatably connected in sequence, a plurality of the arm sections are provided with a plurality of actuators, and a plurality of the arm sections are provided with a plurality of actuators. The actuators are all connected to the first valve group (102).
The boom according to claim 7, further comprising a second valve group (103), the second valve group (103) being used to connect with the actuator of the telescopic arm (100), the second valve group (103) is installed on the side of the telescopic arm (100) close to the turntable (110) or the second valve group (103) is installed on the turntable (110).
A working machine includes the boom according to any one of claims 1 to 9.