Self-propelled hydraulic work machine including an emergency stop valve, and method for controlling the self-propelled hydraulic work machine.

Abstract

A self-propelled hydraulic work machine (1) having an upper structure (4), a lower structure (2), and a boom assembly (7), wherein the boom assembly has an arm (10), the self-propelled hydraulic work machine further has an attachment (14) connected to the arm and a hydraulic system for moving the boom assembly and the attachment, the hydraulic system includes at least one hydraulic pump (17) and a valve block (15), the valve block is designed to be able to adjust the oil flow of at least one hydraulic line (18) connecting the hydraulic consumer (14) to the hydraulic pump in order to operate the hydraulic consumer, at least one hydraulic line is assigned at least one emergency stop valve (23, 24) designed to close the hydraulic line in an emergency, and at least one emergency stop valve is arranged in the region of the boom assembly and / or in the upper structure on the flow side of the valve block remote from the pump.

Description

Technical Field

[0001] The present invention relates to a self-propelled hydraulic working machine having the features of the preamble of claim 1, and a method for controlling a self-propelled hydraulic working machine having the features of the preamble of claim 10.

Background Art

[0002] Self-propelled hydraulic work machines, especially construction machines, are used in various ways on construction sites for demolition and demolition work. Such self-propelled machines are also used in civil engineering and forestry. Examples of self-propelled machines include cranes, excavators, and material handlers, forestry machinery, etc. In the demolition sector, so-called "long-front" excavators or demolition excavators are used. Long booms and arms make self-propelled hydraulic construction machines good tools for using hydraulic attachments for their respective purposes, even at heights of 20m or more. When operating self-propelled hydraulic construction machines, the hydraulic hoses that form the hydraulic system of the attachments are exposed to external influences such as aging processes or weather, which can cause damage to the hydraulic hoses. However, a much more common unexpected cause of damage is external mechanical influence on the hydraulic hoses caused by working in areas that cannot be fully seen. The operator of the excavator cannot see every part of the arm of the self-propelled hydraulic construction machine while operating it, which means that the hydraulic hoses may be damaged, for example, by getting caught on a sharp object at the construction site, or by being punctured, cut, or destroyed. Due to the unavoidable aging process on the one hand, and due to unforeseen external influences on the other, oil leaks may occur in the hydraulic hoses during the normal operation of the construction machine. In particular, disclosure document EP2547912 is known to interrupt the hydraulic system line of an attachment that is damaged by a pipe rupture so that the attachment does not make any uncontrolled movement, remains in a fixed position, and does not impose any safety risks at the construction site. However, the hydraulic system is only interrupted at the attachment side. That is problematic because the long boom and arm of the self-propelled hydraulic work machine require a long hydraulic line that must run from the end of the arm to the attachment, and therefore in the event of an oil leak, more than 400 liters of oil can leak and reach the ground at the construction site, often in less than 30 seconds. Oil loss not only incurs additional costs for replacing the lost oil, but also results in significant environmental pollution at the construction site.

[0003] The same applies to the use of logging mowers, some of which have a grapple on a long boom for gripping the main stem of a tree, and which also have a hydraulic motor for rotating the grapple, in addition to a hydraulic unit for the grapple itself. [Overview of the project]

[0004] The present invention is based on the problem of providing a cost-saving and environmentally friendly self-propelled hydraulic work machine, and a method for controlling such work machine.

[0005] This problem is solved by a self-propelled hydraulic work machine having the features of claim 1, and a method for controlling a self-propelled hydraulic work machine having the features of claim 10.

[0006] Accordingly, a self-propelled hydraulic work machine, particularly a construction machine, having a superstructure, a substructure, and a boom assembly, wherein the boom assembly preferably has a boom (the boom optionally further having an intermediate boom) and an arm, and the self-propelled hydraulic work machine has an attachment connected to the arm, and a hydraulic system for moving the boom assembly and the attachment. The hydraulic system has at least one pump and one valve block, the valve block being designed to regulate the oil flow of at least one, preferably two, hydraulic lines connecting a hydraulic consumer, particularly an attachment, to the pump for control of the hydraulic consumer, particularly the attachment. At least one emergency stop valve is assigned to the hydraulic line(s), which is designed to close the hydraulic line in an emergency, and at least one emergency stop valve is located in the boom assembly region of the hydraulic line and / or in the superstructure on the flow side of the valve block away from the pump.

[0007] At least one emergency stop valve allows the hydraulic line to be closed in case of a leak, thereby largely preventing the leakage of hydraulic oil. The emergency stop valve may also include a closing device such as a gate valve or a ball valve. It is particularly easy to incorporate the emergency stop valve in the superstructure area. The use of an emergency stop valve in the arm area is advantageous because it has a significant advantage if there is a leak in the area between the boom assembly and the attachment. If the hydraulic consumer is a single-acting hydraulic cylinder, it can be given only one hydraulic line with an emergency stop valve, for example. If the hydraulic consumer is a double-acting hydraulic cylinder, it can be given two hydraulic lines, which are connected to a valve block, each having at least one emergency stop valve. If the hydraulic consumer is an attachment, the valve block may be an additional valve block having a volume control valve that controls the volume flow to the attachment.

[0008] Preferably, at least one, and in particular at least two, hydraulic lines are located in a protective area above the arm, or in a protective area formed by channels, and each emergency stop valve is located in this protective area. The protective area means that the hydraulic lines are rigid tubes made of metal in particular, and that they are protected from external influences. These protective areas must be distinguished from areas of hydraulic lines that have flexible hoses that can be quickly torn or damaged.

[0009] Preferably, the hydraulic line is attached to a hydraulic consumer, particularly an attachment, at a first attachment point, and to the boom assembly, particularly the arm, at a second attachment point, forming a flexible hose vent between the two attachment points, and at least one emergency stop valve is preferably located outside the flexible hose vent in the area of ​​the boom assembly or arm. During normal operation of self-propelled hydraulic work machines, oil often leaks from the flexible hose vent because, by its nature, the flexible hose vent is easily punctured at multiple points, for example, on a construction site. However, the hose vent is essential for the use of work machines, especially construction machines, because without it, large movements of the boom assembly and attachments are impossible. Closing at least one emergency stop valve, and thus the hydraulic line and hydraulic system, prevents further leakage in the event of an oil leak.

[0010] Preferably, the emergency stop valve is an electronically controlled solenoid valve, which is particularly cost-effective. The emergency stop valve can be a two-way valve. The hydraulic system then includes at least one return line, the at least one return line connecting the emergency stop valve to the hydraulic oil tank, and the hydraulic system is supplied from the hydraulic oil tank by a pump. In this case, the emergency stop valve does not need to communicate with the valve block because the flow of hydraulic oil through the hydraulic lines in the area of ​​the valve block does not need to be interrupted.

[0011] In a more preferred embodiment, a self-propelled hydraulic work machine, particularly a construction machine, includes an emergency stop actuator, the emergency stop actuator being configured to communicate with at least one emergency stop valve and / or optionally additional valve block, and to close at least one emergency stop valve when activated.

[0012] Preferably, the emergency stop device is located in the operator's cab of the self-propelled hydraulic work machine. If the operator of the self-propelled hydraulic work machine detects a leak, he can activate the emergency stop device to prevent the hydraulic oil from continuing to leak at the point of leakage.

[0013] Preferably, at least one sensor is assigned to at least one hydraulic line, at least one sensor is configured to detect a leak in at least one hydraulic line, and at least one sensor communicates with an emergency stop valve and / or valve block. In this embodiment, the emergency stop valve can be automatically closed in the event of a leak and pressure drop in the hydraulic line.

[0014] In a preferred embodiment, the self-propelled hydraulic work machine is a construction machine, particularly a long boom excavator, which has a reachable height in the range of 15m to 90m and a weight class in particular of 25t to 400t.

[0015] Furthermore, a method is provided for controlling a self-propelled hydraulic work machine, particularly a construction machine, having a superstructure, a substructure, and a boom assembly, wherein the boom assembly has an arm, and the self-propelled hydraulic work machine further has an attachment connected to the arm, and a hydraulic system for moving the boom assembly and the attachment, wherein the hydraulic system includes at least one pump and valve block, particularly an additional valve block, and at least one, particularly at least two, hydraulic lines connecting the attachment to the pump, and the valve block is connected to the hydraulic lines. The method includes the following sequential steps: (a) A hydraulic consumer, in particular, a device that detects the occurrence of leaks in the hydraulic lines between attachments and valve blocks. (b) Switching on or activating and / or moving at least one emergency stop valve to close at least one hydraulic line, in particular at least two hydraulic lines, each of which at least one emergency stop valve is located in the area of ​​the boom assembly and / or in the flow-side superstructure of a valve block away from the pump of one of the hydraulic lines.

[0016] It is preferable to ensure that the closed position is maintained until the leak is repaired. After the leak is repaired, it is advantageous that the emergency stop valve is returned to its initial state or position before the leak.

[0017] In contrast to conventional valves or valve devices that close hydraulic lines, the method of the present invention allows a self-propelled machine to continue operating and moving, except for the control section associated with the leak line. The method of the present invention can be used to prevent a large amount of hydraulic oil from leaking from a leak. Since it is ensured or can be ensured that the closed position is maintained until the leak is repaired and the hydraulic line is restored, hydraulic oil leakage from the hydraulic line can be reliably prevented. It is preferable that the emergency stop valve be returned to the state before the line leak and closure, without tools and without the replacement or updating of any parts / components of the emergency stop valve. It is particularly preferable that the return to the initial state be brought about automatically, for example, after approval by an operator. Such approval may include input in the operating unit, activation of a switch (emergency close switch or emergency stop switch), etc.

[0018] Preferably, at least one emergency stop valve is a two-way valve, and the hydraulic system includes at least one return line, and step (b) of the method is given the following steps: - An emergency stop valve connects the hydraulic line to the return line, which is connected to the hydraulic oil tank, and the hydraulic system is supplied from the hydraulic oil tank by a pump.

[0019] Preferably, the method includes the following step between steps (a) and (b): - Actuate a valve block, particularly an additional valve block, to close at least one (two) hydraulic lines, provided that thereby step (b) is performed with a predetermined time delay.

[0020] Preferably, the method includes detection by visual inspection by an operator or by a sensor arranged in the hydraulic line.

[0021] Preferably, the self-propelled hydraulic working machine includes an emergency stop valve and / or an emergency stop actuator that communicates with an additional valve block, and the method according to step (a) includes the following steps: - Manually operate the emergency stop actuator by an operator.

[0022] The self-propelled hydraulic working machine can be designed as described above.

Brief Description of the Drawings

[0023] Two preferred embodiments of the present invention are described in more detail below with reference to the drawings. Identical or functionally identical components are given the same reference signs in the figures.

[0024] [Figure 1] FIG. 1 is a spatial view of a self-propelled hydraulic working machine. [Figure 2] FIG. 2 is a plan view of the self-propelled hydraulic working machine of FIG. 1. [Figure 3] FIG. 3 is a schematic view of an embodiment of the hydraulic system of the attachment of the self-propelled hydraulic working machine of FIG. 1. [Figure 4] FIG. 4 is a schematic view of a further embodiment of the hydraulic system of the attachment.

Mode for Carrying Out the Invention

[0025] Figure 1 shows a self-propelled hydraulic work machine 1 as a preferred embodiment of a long-arm boom excavator having a substructure 2, the substructure 2 being connected to a superstructure 4 via a rotating mechanism 3 that can rotate around a rotation axis S. The rotating mechanism 3 allows for controlled rotational motion between the superstructure 4 and the substructure 2 around the rotation axis S. Generally, a distinction can be made between motorized excavators and crawler excavators. In the case of a motorized excavator, the substructure 2 may have tires on a chassis. Motorized excavators are used only in the weight class up to 25 tons. Crawler excavators, on the other hand, may have tracks and are used in all weight classes. Motorized and crawler excavators should be distinguished as self-propelled land vehicles from other types of excavators such as floating excavators. In a preferred embodiment, the long-arm excavator 1 is realized as a crawler excavator, which is in the 25t to 400t weight class common for demolition work. The superstructure 4 has a cab 5 at its end in the direction of travel (forward direction) F and a counterweight 6 at the end opposite to the cab 5. Figures 1 and 2 show a boom assembly 7 consisting of three parts, which is attached to the superstructure 4 adjacent to or behind the cab 5. The boom assembly 7 has three interconnected links 8, 9, and 10. The first member 8 is called the boom, the second member 9 is called the intermediate boom, and the third member, furthest from the superstructure, is called the arm 10, and the two consecutive members are bolted together so as to be swivelable relative to each other. The boom assembly 7 further includes a boom cylinder 11 that can move the first link 8 of the boom assembly, and an intermediate boom cylinder 12 that can move the second link 9 of the boom assembly 7. Furthermore, an arm cylinder 22 is provided that can be driven to move the arm 10. An attachment 14 is attached to the free end of the arm 10, through which an arm head bolt 13 passes. This connection can preferably be made by a quick coupler. The attachment 14 and the quick coupler can also be rotated around a pivot axis defined by the arm head bolt 13.In this embodiment, attachment 14 is a gripping tool, but any hydraulic attachment such as a shearing machine can be used.

[0026] The self-propelled hydraulic work machine 1 includes a hydraulic system that drives the boom cylinder 11 and intermediate boom cylinder 12, as well as the arm cylinder 22, with hydraulic oil. The flow of hydraulic oil and associated movement are controlled and monitored by a main valve block (not shown) of the hydraulic system located in the superstructure 4. The main valve block includes a valve that adjusts the amount of hydraulic oil supplied to one of the hydraulic cylinders. Furthermore, the main valve block has the role of controlling the hydraulic rotation drive of the rotary mechanism 3 and the hydraulic travel drive for the tracks of the substructure 2. An additional valve block 15, a hydraulic oil tank 16, and a hydraulic pump 17 also belong to the hydraulic system and are located in the superstructure 4. The hydraulic pump 17 supplies hydraulic oil to the hydraulic system and is connected to the main valve block and the additional valve block 15 via hydraulic connections. If the performance of one pump is insufficient for the required application, or if the system is designed to be redundant, multiple pumps may be used in the hydraulic system. The additional valve block 15 controls and adjusts the flow of hydraulic oil to the attachment 14. The hydraulic line 18 leads from an additional valve block 15 to the attachment 14. Figure 1 shows only one hydraulic line 18, but depending on the type of attachment and work machine used, there may be multiple or at least two hydraulic lines 18. The type of attachment 14 and the movements it can perform determine the number of hydraulic lines 18 (used and connected). The hydraulic line 18 is formed by flexible hose lines, also called boom hose vents 20, positioned in vents between the superstructure 4 and the first link 8, between the first link 8 and the second link 9, and between the second link 9 and the arm 10, in the area of ​​the bolts 19 of the boom assembly 17. A flexible hose vent 21 is also formed between the first mounting point of the attachment 14 and the second mounting point of the arm 10. The flexible boom hose vents 20 and 21 allow the individual links of the boom assembly 7 to pivot around the longitudinal axis of the bolts 19 without interrupting or rupturing the hydraulic line 18. Hose vents 21 and boom hose vents 20 are formed for their respective additional hydraulic lines 18 (not shown here).The portion of the hydraulic line 18 that runs centrally along the links of the boom assembly 7, away from the pivot axis or bolt 19, is realized by rigid metal tubing. The ends of the metal tubing are each connected to flexible hose lines to form the hydraulic line 18. The metal tubing forms a protective area from which the hydraulic line 18 is protected from external damage. In the shown hydraulic line 18, there are two emergency stop valves 23, 24 between the additional valve block 15 and the attachment 14. At least two of the emergency stop valves 23, 24 of the hydraulic line 18 are divided into a first emergency stop valve 23 and a second emergency stop valve 24, schematically shown as rectangles in Figure 1. The first emergency stop valve 23 and the second emergency stop valve 24 can close the corresponding hydraulic line 18 at their respective positions. This ensures that the emergency stop valve 23, 24 located on the side near the additional valve block where the oil leak is occurring prevents the leakage of hydraulic oil located between this emergency stop valve 23, 24 and the hydraulic pump 17 or hydraulic oil tank 16 in the hydraulic line 18. The first emergency stop valve 23 is located in the flow-side superstructure 4 of an additional valve block 15, away from the pump. The second emergency stop valve 24 is located in the hydraulic line 18 in the area of ​​the arm 10 outside the hose vent 21. A location just upstream or downstream of the flexible hose line in the area of ​​the arm head bolt 13 in the flow direction is particularly preferred, as shown in Figure 1. Empirically, hose lines often leak in the area of ​​the arm head bolt 13. The above location of the second emergency stop valve 24 allows for the retention of the maximum possible amount of hydraulic oil in the hydraulic line 18 in the event of such leakage. If oil leakage occurs in the hose vent 21, closing the second emergency stop valve 24 will keep the oil in the hydraulic line 18 between the second emergency stop valve 24 and the additional valve block 15 in the hydraulic line 18, preventing it from leaking. For example, it is conceivable to use an additional emergency stop valve to protect the boom hose vent 20 of the second link 9 from leakage. At least one emergency stop valve 23,24 is required for each of the hydraulic lines 18.Even with only the first emergency stop valve 23, a large portion of the hydraulic oil will not leak if a leak occurs in the flexible hose line in the area of ​​the arm head bolt 13. The emergency stop valves 23,24 are distinctly different from the ordinary pipe burst safety valves that are standardly installed in self-propelled hydraulic work machines. The pipe burst safety valve (not shown) is installed on the attachment 14 and prevents uncontrolled movement of the attachment 14 in the event of a pipe burst to protect operators and construction site personnel. The pipe burst safety valve maintains the pressure of the hydraulic oil in the working chamber of the attachment 14 or the hydraulic cylinder installed on the attachment 14, allowing the attachment 14 to remain in a fixed position. On the other hand, the emergency stop valves 23,24 interrupt the hydraulic system at at least one point toward the additional valve block 15. Hydraulic oil will leak in the hydraulic line between the point of failure and the emergency stop valves 23,24. However, the emergency stop valves 23,24 prevent a large amount of hydraulic oil from leaking and contribute to environmental protection during demolition work. An emergency stop valve may also be provided to the hydraulic line to other hydraulic consumers. These hydraulic consumers may be, for example, boom cylinder 11, intermediate boom cylinder 12, and / or arm cylinders.

[0027] Figure 3 shows a portion of the hydraulic system, which is shown only schematically and is used in particular to control the movement of attachment 14. The hydraulic valves of an additional valve block 15 are electrically pilot-controlled to move attachment 14, and are not shown in the figure. A hydraulic pump 17 supplies the additional valve block 15 with the hydraulic pressure required to control attachment 14 or its hydraulic cylinder. The additional valve block 15 can regulate the volumetric flow of hydraulic oil through four hydraulic lines 18, shown as an example, and thus control the movement of attachment 14. There is one first emergency stop valve 23 and one second emergency stop valve 24 for each of the hydraulic lines 18. The first emergency stop valve 23 and the second emergency stop valve 24 are located in two different areas of the hydraulic line 18, respectively. A hose vent 20 closest to the additional valve block and a flexible hose vent 21 in the area of ​​the arm head bolt 13 are shown.

[0028] The first emergency stop valve 23 is located in the superstructure 4, that is, in the superstructure area of ​​each hydraulic line 18, specifically on the flow side of the additional valve block 15, farther from the pump. The second emergency stop valve 24 is located in the boom assembly area of ​​each hydraulic line 18, specifically, as already described above, in the area of ​​the arm 10 outside the superstructure 4 and outside the flexible hose vent 21. To allow hydraulic oil to flow unobstructed through the emergency stop valves 23, 24, the emergency stop valves 23, 24 are open during normal operation of the self-propelled hydraulic work machine 1. The emergency stop valves 23, 24 are controlled by an emergency stop actuator 25. When the emergency stop actuator 25 is activated, the hydraulic line 18 is closed by the emergency stop valves 23, 24, and the flow of hydraulic oil is stopped. The emergency stop actuator 25 communicates electronically with the additional valve block 15 to switch on the emergency stop valves 23, 24.

[0029] After a leak is detected in one of the hydraulic lines 18 between attachment 14 and additional valve block 15, emergency stop valves 23 and 24 are switched on, and the hydraulic line 18 is closed. Figure 3 shows the closed state of emergency stop valves 23 and 24, which is achieved by activating the emergency stop actuator 25.

[0030] In a preferred embodiment, the emergency stop valves 23 and 24 are electronically controlled solenoid valves.

[0031] In a preferred embodiment, leakage is detected by an operator, who then activates the emergency stop device 25, thereby switching on the emergency stop valves 23 and 24 and closing the hydraulic line 18. Detection can also be performed by a sensor assigned to the hydraulic line 18, and the emergency stop device 25 can then be activated automatically.

[0032] In a preferred embodiment, first an additional valve block 15 is activated by an emergency stop actuator 25, and the additional valve block 15 stops at least two hydraulic lines 18. Next, emergency stop valves 23, 24 are switched on, and the hydraulic lines 18 are closed with a predetermined time delay.

[0033] Figure 4 shows a further embodiment of a hydraulic system that is largely similar to that in Figure 3. In this case, the attachment 14 is hydraulically pilot-controlled by a low-pressure line. Boom hose vents 20 and 21 are not depicted. The differences between Figure 4 and Figure 3 are described below. In the embodiment shown in Figure 4, the first emergency stop valve 23 in the superstructure area of ​​the hydraulic line 18 is realized by a two-way valve 26, which can be connected to the hydraulic oil tank 16 of the hydraulic system via a return line 27. In normal operation, the second emergency stop valve 24 (which in one embodiment is an electronically controlled solenoid valve) is open in the boom assembly area, and the two-way valve 26 in the superstructure area is in the first switching position, which allows hydraulic oil to flow from an additional valve block 15 through the hydraulic line 18 to the attachment 14.

[0034] After an oil leak is detected by an operator or sensor, the second emergency stop valve 24 in the boom assembly area of ​​the hydraulic line 18 is switched on and closed by activating the emergency stop actuator 25, and the two-way valve 26 is switched to the indicated second switching position, where hydraulic oil flows from the additional valve block 15 to the hydraulic oil tank 16 via the return line 27.

[0035] It is conceivable to use two or more emergency stop valves 23, 24 per hydraulic line 18.

[0036] Thus, in both types of hydraulic systems, which are pilot-controlled either electrically or hydraulically, oil leak detection can be performed by an operator or a sensor. The emergency stop device 25 can be designed, for example, as an activation button in the operator's cab 5 or on the boom assembly 7, or it can be accessed via the control unit of the self-propelled hydraulic work machine 1, which has the necessary operating elements to control the self-propelled hydraulic work machine 1. By activating the emergency stop device 25, the emergency stop valves 23, 24 are switched on and the flow of hydraulic oil is stopped. By activating the emergency stop device 25 again, the emergency stop valves 23, 24 can be switched back and the hydraulic line 18 to the attachment 14 can be opened again. The emergency stop valves 23, 24 are switched back when the oil leak in the hydraulic line 18 is corrected. If a leak is detected by a sensor, an alarm may be sounded, which will allow the operator to activate the emergency stop device 25. However, emergency stop valves 23, 24 and / or additional valve blocks 15 can also be automatically activated by sensors that detect a pressure drop. In further embodiments, it is intended to use an emergency stop valve that automatically closes in the event of a pressure drop in the hydraulic line 18.

Claims

1. A self-propelled hydraulic work machine (1) having a superstructure (4), a substructure (2), and a boom assembly (7), wherein the boom assembly (7) has an arm (10), and the self-propelled hydraulic work machine (1) further has an attachment (14) connected to the arm (10), and a hydraulic system for moving the boom assembly (7) and the attachment (14), wherein the hydraulic system comprises a hydraulic consumer, and the hydraulic system further includes at least one hydraulic pump (17) and a valve block (15), wherein the valve block (15) is designed to regulate the oil flow of at least one hydraulic line (18) that connects the hydraulic consumer to the hydraulic pump (17) in order to actuate the hydraulic consumer, in the self-propelled hydraulic work machine (1), A self-propelled hydraulic work machine (1) is characterized in that it is assigned at least one emergency stop valve (23, 24) designed to close the hydraulic line (18) in an emergency, the at least one emergency stop valve (23, 24) is located in the area of ​​the boom assembly (7) and / or on the flow-side superstructure (4) of the valve block (15) away from the pump, and at least one emergency stop valve (23) is located between the hydraulic pump (17) or hydraulic oil tank (16) and the boom assembly (7) and near the valve block (15) to prevent leakage of hydraulic oil between the at least one emergency stop valve (23) and the hydraulic pump (17) or hydraulic oil tank (16) in the hydraulic line (18).

2. The self-propelled hydraulic work machine (1) according to claim 1, characterized in that at least one hydraulic line (18) is located above the arm (10) or in a protective area formed by a conduit, which protects the at least one hydraulic line (18) from external influences, and each emergency stop valve (24) is located in the protective area.

3. The self-propelled hydraulic work machine (1) according to claim 1 or 2, characterized in that at least one hydraulic line (18) is attached to a first attachment point to a hydraulic consumer and a second attachment point to a boom assembly (10), and a flexible hose vent (21) is formed between the two attachment points, and at least one emergency stop valve (24) is located in the area of ​​the boom assembly (10) outside the flexible hose vent (21).

4. The self-propelled hydraulic work machine (1) according to claim 1 or 2, characterized in that at least one emergency stop valve (23, 24) is an electronically controlled solenoid valve.

5. The self-propelled hydraulic work machine (1) according to claim 4, characterized in that at least one emergency stop valve (23, 24) is a two-way valve (26), the hydraulic system includes at least one return line (27), the return line (27) connects at least one emergency stop valve (26) to a hydraulic oil tank (16), and the hydraulic system is supplied from the hydraulic oil tank (16) by a hydraulic pump (17).

6. The self-propelled hydraulic work machine (1) according to claim 1 or 2, characterized in that the self-propelled hydraulic work machine (1) includes an emergency stop actuator (25), the emergency stop actuator (25) communicates with at least one emergency stop valve (23, 24, 26) and / or a valve block (15), and is configured to close when at least one emergency stop valve (23, 24, 26) is activated.

7. The self-propelled hydraulic work machine (1) according to claim 6, characterized in that the emergency stop device (25) is located in the operator's cab (5) of the self-propelled hydraulic work machine (1).

8. The self-propelled hydraulic work machine (1) according to claim 1 or 2, characterized in that at least one hydraulic line (18) is assigned at least one sensor configured to detect a leak in at least one hydraulic line (18), and at least one sensor communicates with at least one emergency stop valve (23, 24, 26) and / or valve block (15).

9. The self-propelled hydraulic work machine (1) according to claim 1 or 2, characterized in that the self-propelled hydraulic work machine (1) is a long boom excavator having a reach height in the range of 15 m to 40 m.

10. A method for controlling a self-propelled hydraulic work machine (1) having a superstructure (4), a substructure (2), and a boom assembly (7), wherein the boom assembly (7) has an arm (10), and the self-propelled hydraulic work machine (1) further has an attachment (14) connected to the arm (10), and a hydraulic system for moving the boom assembly (7) and the attachment (14), wherein the hydraulic system comprises a hydraulic consumer, and the hydraulic system further includes at least one hydraulic pump (17) and a valve block (15), and at least one hydraulic line (18) connecting the hydraulic consumer to the hydraulic pump (17), and the valve block (15) is connected to at least one hydraulic line (18), the method comprising the following sequential steps: (a) Detect a leak in the hydraulic line (18) between the hydraulic consumer and the valve block (15), (b) Switching on at least one emergency stop valve (23, 24) to close at least one hydraulic line (18), wherein each of the at least one emergency stop valve (23, 24) is located in the area of ​​the boom assembly (7) and / or on the flow-side superstructure (4) of a valve block (15) away from the pump in at least one hydraulic line (18), and at least one emergency stop valve (23) is located between the hydraulic pump (17) or hydraulic oil tank (16) and the boom assembly (7) and near the valve block (15) to prevent leakage of hydraulic oil between the at least one emergency stop valve (23) and the hydraulic pump (17) or hydraulic oil tank (16) in the hydraulic line (18).

11. The method according to 10, wherein at least one emergency stop valve is a two-way valve (26), the hydraulic system includes at least one return line (27), and in step (b), the emergency stop valve (26) connects the associated hydraulic line (18) to the return line (27), the return line (27) is connected to a hydraulic oil tank (16), and the hydraulic system is supplied from the hydraulic oil tank (16) by a hydraulic pump (17).

12. The method according to 10, characterized in that it includes the following method step between step (a) and step (b): - The valve block (15) is activated to close at least one hydraulic line (18), wherein step (b) is performed with a predetermined time delay.

13. The method according to any one of 10 to 12, characterized in that in step (a), detection is performed by visual inspection by an operator or by a sensor placed in the hydraulic line (18).

14. The method according to any one of 10 to 12, wherein the self-propelled hydraulic work machine (1) includes an emergency stop actuator (25) that communicates with at least one emergency stop valve (23, 24, 26) and / or a valve block (15), and the method comprises the following method step after step (a): - The operator manually operates the emergency stop device (25).

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