Boom and operating machinery

Abstract

The present invention relates to the field of emergency operations, and provides a boom and operating machinery, wherein the boom comprises: a telescopic arm, a first valve group, and an emergency pipeline, the telescopic arm comprising an inner cavity; the first valve group being used to connect to an actuator of an extension arm segment group; the emergency pipeline being placed in the inner cavity, one end of the emergency pipeline being connected to the first valve group, and the other end of the emergency pipeline being suspended. In order to solve the defect in the prior art that the boom cannot be recovered in extreme conditions of no electricity, the boom provided by the present invention connects an emergency pipeline to the first valve group, and the emergency pipeline is placed in the inner cavity of the telescopic arm. In extreme conditions such as no electricity, the emergency pipeline is connected to the emergency hydraulic system through the emergency pipeline to achieve recovery of the extension arm segment group, thereby improving the reliability of the emergency recovery boom.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency operations, and in particular to an arm and an operating machine. Background Art

[0002] At present, in operating machinery with booms, such as fire trucks and aerial platforms, when the operating machinery fails, for example, the power system cannot output power, in order to avoid the boom from accidentally falling while suspended in the air, an emergency power device is required to urgently retract the boom.

[0003] Existing emergency power systems add an auxiliary hydraulic power system to the main hydraulic power system to handle failures. However, this type of emergency power system still has the disadvantage of being unable to activate in a power-off state. This is especially true for boom sections that are far from the ground, which cannot be retracted in an extreme power-off state. Summary of the Invention

[0004] The present invention provides a boom and an operating machine to solve the defect in the prior art that the boom cannot be recovered in extreme situations such as no electricity. A first valve group is provided to control the recovery of the extended boom section group, and an emergency pipeline connected to the first valve group is provided in the inner cavity of the telescopic arm to achieve emergency control of the first valve group in extreme situations such as no electricity, thereby controlling the recovery of the extended boom section group.

[0005] The present invention provides a boom, comprising:

[0006] A telescopic arm, one end of the telescopic arm being connected to the turntable, the other end of the telescopic arm being connected to the extension arm segment assembly, and the telescopic arm comprising an inner cavity;

[0007] a first valve group, the first valve group being connected to an actuator of the extension arm section group;

[0008] An emergency pipeline is placed in the inner cavity, one end of the emergency pipeline is connected to the first valve group, and the other end of the emergency pipeline is suspended.

[0009] According to the arm support provided by the present invention, the first valve group is installed in the inner cavity, and the emergency pipeline is connected to the pilot port of the first valve group.

[0010] According to the boom provided by the present invention, a quick-connect connector is provided at one suspended end of the emergency pipeline, and the quick-connect connector is used to be connected to the emergency hydraulic system.

[0011] The boom provided according to the present invention further includes a one-way valve, an oil inlet of the one-way valve is connected to the emergency pipeline, and an oil outlet of the one-way valve is connected to the first valve group.

[0012] According to the arm support provided by the present invention, the telescopic arm comprises an inner cylinder and an extension cylinder, wherein the extension cylinder is sleeved outside the inner cylinder and is telescopic relative to the inner cylinder;

[0013] The inner cylinder is formed with an inner cavity, and the emergency pipe is connected to the side wall of the inner cylinder.

[0014] According to the arm provided by the present invention, the suspended end of the emergency pipeline extends to the end of the inner tube away from the first valve group.

[0015] The boom provided according to the present invention further includes the turntable and the extension arm segment 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 segment group.

[0016] According to the arm support provided by the present invention, the extension arm segment group includes a plurality of arm segments rotatably connected in sequence, the plurality of arm segments are provided with a plurality of actuators, and the plurality of actuators are all connected to the first valve group.

[0017] The arm provided according to the present invention further includes a second valve group, which is used to connect with the actuator of the telescopic arm. The second valve group is installed on the side of the telescopic arm close to the turntable or the second valve group is installed on the turntable.

[0018] The present invention also provides an operating machine, comprising the above-mentioned boom.

[0019] The boom provided by the present invention is configured by arranging a first valve group in the inner cavity of the telescopic arm near one end of the extension arm section group, and the first valve group is used to control the extension and retraction of the extension arm section group; an emergency pipeline is connected to the first valve group, and the emergency pipeline is placed in the inner cavity of the telescopic arm. Under extreme conditions such as no power, the emergency pipeline is connected to the emergency hydraulic system through the emergency pipeline to realize the recovery of the extension arm section group, thereby improving the reliability of the emergency recovery boom.

[0020] Furthermore, the working machine provided by the present invention has the boom as described above, and thus also has the various advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the boom structure in the retracted state of the telescopic arm provided by the present invention;

[0023] Figure 2 This is a schematic diagram of the boom structure of the telescopic arm provided by the present invention in an extended state;

[0024] Figure 3 It is a schematic diagram of the emergency hydraulic system provided by the present invention.

[0025] Reference numerals:

[0026] 100: telescopic arm; 101: inner cavity; 102: first valve group; 103: second valve group; 201: emergency pipeline; 110: turntable; 111: first oil cylinder; 112: extension cylinder; 113: inner cylinder; 120: original hydraulic system; 130: extension arm section group; 131: second oil cylinder; 132: first arm section; 133: second arm section; 134: 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: oil tank. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0029] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0030] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0031] The following combination Figures 1 to 3 It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute a limitation on the present invention.

[0032] like Figure 1 As shown, the present invention provides a boom, comprising: a telescopic boom 100, a first valve assembly 102 disposed within the boom 100, and an emergency conduit 201. The telescopic boom 100 has one end connected to a turntable 110, and the other end connected to an extension boom section assembly 130. The telescopic boom 100 includes an inner cavity 101; that is, the telescopic boom 100 is located at the end of the boom, closer to the ground. The first valve assembly 102 is mounted within the inner cavity 101 and is connected to the actuator of the extension boom section assembly 130; that is, the first valve assembly 102 is used to control the extension state of the extension boom section assembly 130. The emergency conduit 201 is disposed within the inner cavity 101, with one end connected to the first valve assembly 102 and the other end suspended. In other words, in an emergency, the emergency conduit 201 connects the first valve assembly 102 to the emergency hydraulic system, enabling emergency retraction of the extension boom section assembly by controlling the first valve assembly 102.

[0033] Specifically, in the operating machine, the telescopic arm 100 close to the ground can be lowered by its own weight. In an emergency, the arm section in the arm that is far from the ground is mainly retracted. When the operating machine is out of power, 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 is retracted 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 to the emergency hydraulic system, the extended arm section group 130 in the arm that is far from the ground can be recovered. The structure is simple and reliable, and the arm can be recovered in extreme situations.

[0034] Regarding the first valve assembly 102 of the present invention, the existing boom control valve assembly is integrally mounted at the end of the telescopic boom 100 or on the boom's turntable 110. However, due to the complex extension of the multi-section boom, numerous pipelines are required, and all pipelines must pass through the telescopic boom 100 to reach other boom sections. This results in numerous and heavy pipelines on the telescopic boom 100, and limited internal space within the telescopic boom 100. Since the weight and structural space of the pipeline conveying structure increase exponentially with the number of pipelines, the installation and maintenance of the pipelines and the pipeline conveying structure are relatively difficult. The related art uses electrical emergency methods, but they cannot meet the emergency recovery function under the most extreme working conditions, reducing the reliability of the operating machinery.

[0035] Therefore, the first valve group 102 of the extension arm section group 130 of the boom and the second valve group 103 of the telescopic arm 100 are set separately, and the first valve group 102 is placed at the end of the telescopic arm 100 close to the extension arm section group 130, that is, the head end of the telescopic arm 100, so as to reduce the pipelines and pipeline conveying 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 conveying structures.

[0036] Furthermore, in some embodiments of the present invention, the boom also includes a second valve group 103, which is used to connect to the actuator of the telescopic arm 100, for example, through a pipeline connection, and 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.

[0037] Specifically, the telescopic boom 100 is equipped with an actuator for extension and retraction inside the boom and an actuator for luffing the boom 100 outside the boom. The second valve assembly 103 is used to control the movement of the actuators for extension and retraction. The second valve assembly 103 is installed close to the ground, allowing the operator to manually operate the second valve assembly 103 to retract the boom in an emergency.

[0038] like Figure 2 As shown, in one embodiment of the present invention, the telescopic arm 100 includes an inner cylinder 113 and an extension cylinder 112. The extension cylinder 112 is sleeved outside the inner cylinder 113 and extends relative to the inner cylinder 113. The inner cylinder 113 defines an inner cavity 101, and the emergency conduit 201 is connected to the sidewall of the inner cylinder 113. For example, the telescopic arm 100 adopts a box-shaped structure with a hollow interior. Therefore, the emergency conduit 201 can be arranged along the inner cylinder 113 of the telescopic arm 100, or the emergency conduit 201 can be arranged on the internal cylinder barrel and extend to the bottom end of the telescopic arm 100.

[0039] In other words, the telescopic arm 100 includes multiple telescopic sections, which are extended and retracted by 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 other end of the extension tube 112 is connected to one end of the inner tube 113 via an actuator. The inner tube 113 is provided with a first valve group 102, which is connected to the emergency pipe 201. The emergency pipe 201 is connected to the side wall of the inner tube 113 along its length via a clamp. When the extension tube 112 and the inner tube 113 of the telescopic arm 100 are relatively extended and retracted, the emergency pipe 201 and the telescopic arm 100 do not move relative to each other.

[0040] Furthermore, in some embodiments of the present invention, the emergency conduit 201 can be arranged along the barrel of a hydraulic cylinder, which is the actuator within the telescopic arm 100 for extending and retracting the extension cylinder 112 and inner cylinder 113. The emergency conduit 201 and the barrel of the hydraulic cylinder do not move relative to each other, and the emergency conduit 201 extends along the barrel of the hydraulic cylinder to the end of the telescopic arm 100. Furthermore, the end of the telescopic arm 100 can be close to the lower equipment, allowing for manual emergency operation. Furthermore, the emergency conduit 201 is connected to the pilot oil circuit of the first valve group 102, which can be used to open the valves of the first valve group 102.

[0041] Of course, the telescopic arm 100 may include a plurality of telescopic cylinders, which are nested with each other and connected by actuators to achieve telescopic extension, thereby achieving the extension of the telescopic arm 100. The plurality of actuators are all connected to the second valve group 103 through pipelines, and the actuators may be hydraulic cylinders. In particular, after a failure of the operating machine occurs, the second valve group 103 is controlled manually or by an external power source to be reversed, so that the actuators of the telescopic arm 100 are unloaded, thereby achieving the retraction of the extension cylinder 112 and the inner cylinder 113 of the telescopic arm 100 by their own weight. At this time, the emergency pipeline 201 is placed at the end of the telescopic arm 100 to facilitate connection with the emergency hydraulic system, and to control the actuators of other extension arm segment groups 130, such as hydraulic cylinders, to retract them.

[0042] like Figure 2 and Figure 3 As shown, in another embodiment of the present invention, the emergency conduit 201 is connected to the pilot port 204 of the first valve assembly 102. For example, the first valve assembly 102 is a hydraulically controlled pilot valve assembly, and its pilot port 204 can be connected to both the primary hydraulic system 120 and the emergency hydraulic system via a three-way valve. In the event of a failure in the primary hydraulic system 120 of the working machine, the pilot port 204 of the first valve assembly 102 is connected to the emergency hydraulic system, reversing the direction of the first valve assembly 102 and, in turn, controlling the actuators of the extension boom assembly 130, thereby retracting the extension boom assembly 130.

[0043] The first oil inlet 205 and first oil outlet 206 of the first valve group 102 are also connected to the emergency hydraulic system. The pipelines for the first oil inlet 205 and first oil outlet 206 of the first valve group 102 do not need to be connected to the inner cavity 101 of the telescopic arm 100 via separate three-way valves. The oil inlets and outlets of the first valve group 102 and the second valve group 103 are separately connected. Therefore, the oil inlet and outlet of the second valve group 103 can be connected to the emergency hydraulic system to achieve oil supply and return to the first valve group 102.

[0044] Furthermore, if Figure 3 As shown, the emergency hydraulic system includes an emergency pump 200, a first reversing valve 202, a second reversing valve and an emergency one-way 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 respectively connected to the emergency pipeline 201 and the second reversing valve. The second reversing valve is connected to the first oil inlet 205 and the first oil outlet 206 of the first valve group 102.

[0045] 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, which serves as pilot oil to reverse the first valve group 102, and supplies oil to the first oil inlet 205 or the first oil outlet 206 of the first valve group 102 through the second reversing valve. The switching of the working position of the second reversing valve enables one of the first oil inlet 205 and the first oil outlet 206 of the first valve group 102 to be 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, thereby allowing the arm section of the extended arm section group 130 to be recovered.

[0046] The first valve assembly 102 includes multiple pilot valves, each of which has multiple pilot ports 204 connected to a plurality of emergency pipes 201. Depending on the need or order of retraction of the boom sections in the boom section assembly 130, the multiple emergency pipes 201 can be selectively connected to the first reversing valve 202 to enable sequential retraction of multiple boom sections.

[0047] Specifically, in other embodiments of the present invention, a quick-connect connector is provided at one end of the suspension of the emergency pipe 201, and the quick-connect connector 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. When not in use, the quick-connect connector is in an automatically closed state, which can effectively seal the oil circuit, improve safety and reliability, etc. In other words, to prevent the problem of hydraulic oil outflow when the emergency pipe 201 is not in use, a quick-connect connector 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 can facilitate the quick connection of the emergency pipe 201 to the oil inlet of the emergency one-way valve 203 of the emergency hydraulic system. In other words, a female connector that matches the quick-connect 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, facilitating a quick connection.

[0048] Furthermore, in some other embodiments of the present invention, the boom further includes a one-way valve, the oil inlet of which is connected to the emergency pipeline 201, and the oil outlet of which 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, thereby preventing the failure of the first valve group 102 if the emergency pipeline 201 fails.

[0049] Among them, the first valve group 102 includes a one-way valve arranged 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 flow of hydraulic oil from the pilot port 204, the first oil inlet 205 and the first oil outlet 206 of the first valve group 102 to 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, which would cause the failure of the first valve group 102.

[0050] Regarding the emergency conduit 201 of the present invention, in one embodiment, one suspended end of the emergency conduit 201 extends to the end of the inner barrel 113 away from the first valve assembly 102. In other words, when the telescopic arm 100 is fully retracted, one end of the quick-connect connector of the emergency conduit 201 should be placed at the end of the telescopic arm 100 to quickly connect the emergency conduit 201 to the emergency hydraulic system in an emergency.

[0051] For example, if the first valve assembly 102 is installed at the top of the inner cylinder 113, the length of the emergency conduit 201 can be greater than that of the inner cylinder 113, extending beyond the bottom of the inner cylinder 113. For another example, if the first valve assembly 102 is installed in the upper middle portion of the inner cylinder 113, the length of the emergency conduit 201 can be less than that of the inner cylinder 113, but the quick-connector end of the emergency conduit 201 is the suspended end and still extends to the bottom of the inner cylinder 113.

[0052] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the boom further includes a turntable 110 and an extension arm segment assembly 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 rotatably connected to the extension arm segment assembly 130 .

[0053] The turntable 110 is rotatably connected to the working machine's frame, driving the boom's rotation. A first cylinder 111 is located between the turntable 110 and the telescopic boom 100. This cylinder, controlled by the second valve block 103, controls the relative angle between the turntable 110 and the telescopic boom 100. A second cylinder 131 is located between the telescopic boom 100 and the extension boom section 130. This second cylinder 131 is controlled by the first valve block 102 and is used to control the relative angle between the telescopic boom 100 and the extension boom section 130.

[0054] More specifically, the turntable 110 is hinged to the telescopic cylinder of the telescopic arm 100 , and the inner cylinder 113 of the telescopic arm 100 is hinged to the arm section of the extension arm section group.

[0055] Among them, continue to refer to Figure 1 With respect to the extension arm section group 130 of the present invention, in a specific embodiment of the present invention, the extension arm section group 130 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 all connected to the first valve group 102, for example, through a pipeline.

[0056] For example, the extension arm section assembly 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, one end of the second arm section 133 is rotatably connected to the other end of the first arm section 132, 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, and a fourth oil cylinder is provided between the third arm section and the second arm section 133.

[0057] The second, third, and fourth cylinders 131, 134, and 135 are all connected to the first valve assembly 102 via pipelines. The first valve assembly 102 controls the extension and retraction of the second, third, and fourth cylinders 131, 134, and 135, respectively. Of course, the number of boom sections and cylinders in the extension boom section assembly 130 is not limited to the example above and can be more or less than three.

[0058] The present invention provides an operating machine including the boom of the above embodiment, wherein the operating machine may be an engineering machine such as a crane, an excavator, a pile driver, or an engineering vehicle such as a aerial platform, a fire truck, or a mixer truck.

[0059] The boom provided by the present invention is configured to have a first valve group 102 set in the inner cavity 101 at one end of the telescopic arm 100 close to the extension arm section group 130, and the first valve group 102 is used to control the extension and retraction of the extension arm section group 130; an emergency pipe 201 is connected to the first valve group 102, and the emergency pipe 201 is placed in the inner cavity 101 of the telescopic arm 100. Under extreme conditions such as no electricity, the emergency pipe 201 is connected to the emergency hydraulic system to realize the recovery of the extension arm section group 130, thereby improving 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 routing too many pipelines through the inner cavity 101 of the telescopic arm 100, thereby reducing the weight of the telescopic arm 100, and at the same time, it also facilitates the installation, routing and maintenance of the first valve group 102, thereby reducing the failure rate.

[0060] Furthermore, the working machine provided by the present invention has the boom as described above, and thus also has the various advantages as described above.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A boom, characterized in that: include: A telescopic arm (100), one end of the telescopic arm (100) is used to connect to a turntable (110), the other end of the telescopic arm (100) is used to connect to an extension arm segment assembly (130), and the telescopic arm (100) includes an inner cavity (101); a first valve group (102), the first valve group (102) being installed in the inner cavity (101), the first valve group (102) being used to connect with an actuator of the extension arm section group (130); An 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 pilot port (204) of the first valve group (102), the other end of the emergency pipe (201) is suspended, and a quick-connect connector is provided at the suspended end of the emergency pipe (201), and the quick-connect connector is used to connect to the emergency hydraulic system; a one-way valve, wherein 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); An emergency hydraulic system comprises an emergency pump (200), a first reversing valve (202), a second reversing valve and an emergency one-way 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 respectively connected to the emergency pipeline (201) and the second reversing valve; the second reversing valve is connected to the first valve group (102).

2. The boom according to claim 1, characterized in that: The telescopic arm (100) comprises an inner cylinder (113) and an extension cylinder (112), wherein the extension cylinder (112) is sleeved outside the inner cylinder (113) and is telescopic relative to the inner cylinder (113); 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).

3. The boom according to claim 2, characterized in that: One suspended end of the emergency pipe (201) extends to an end of the inner cylinder (113) away from the first valve group (102).

4. The boom according to claim 1, characterized in that: It also includes the turntable (110) and the extension arm segment 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 rotatably connected to the extension arm segment group (130).

5. The boom according to claim 4, characterized in that: The extension arm segment group (130) comprises a plurality of arm segments that are rotatably connected in sequence, and the plurality of arm segments are provided with a plurality of actuators, and the plurality of actuators are all connected to the first valve group (102).

6. The boom according to claim 4, characterized in that: The invention also includes a second valve group (103), wherein the second valve group (103) is used to be connected to the actuator of the telescopic arm (100), and the second valve group (103) is installed on a side of the telescopic arm (100) close to the turntable (110) or the second valve group (103) is installed on the turntable (110).

7. A working machine, characterized in that: The invention comprises the boom according to any one of claims 1 to 6.

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