Demolition machine hydraulic circuit and demolition machine

Abstract

The present application provides a dismantling machine hydraulic circuit and a dismantling machine, which relate to the technical field of dismantling machines, including a chassis circuit and a first actuator circuit, a first pressure source for supplying hydraulic medium to the two circuits; a first hydraulic medium containing mechanism for containing the hydraulic medium refluxed from the two circuits; a conversion assembly connected to the first pressure source, the first hydraulic medium containing mechanism, the first actuator circuit and the chassis circuit; in the first state of the conversion assembly, the first pressure source and the first hydraulic medium containing mechanism are both connected to the first actuator circuit to drive the first actuator; in the second state of the conversion assembly, the first pressure source and the first hydraulic medium containing mechanism are both connected to the chassis circuit to drive the chassis. Applying the dismantling machine hydraulic circuit to the dismantling machine solves, to a certain extent, the technical problem that the oil circuit layout occupies a large space due to the need to add multiple control valves for controlling the working device and the retractable lower chassis of the dismantling machine using a separate control oil circuit.

Description

Technical Field

[0001] The present application relates to the technical field of demolition machines, and in particular to a demolition machine hydraulic circuit and a demolition machine. Background Art

[0002] The demolition machine is a main machine based on a hydraulic excavator. It uses quick-change joints to install different working devices to achieve a variety of operations, such as breakers and hydraulic shears. Because different working devices perform different actions, there are relatively more oil circuits to control the front-end working devices, especially hydraulic shears. In order to cut objects in the shortest time, the shearing angle needs to have a 360-degree adjustment function to achieve the best construction angle. In addition, the larger the track span of the demolition machine, the better the contact ratio and stability can be obtained. In order to facilitate transportation, the demolition machine usually has a retractable undercarriage. When the demolition machine is in operation, the chassis is no longer retracted and adjusted. During transportation, the tracks are retracted inward for easy transportation.

[0003] However, in the prior art, the working device and the retractable lower chassis of the demolition machine are controlled by separate control oil circuits, which requires the addition of multiple control valves and occupies a large space for the oil circuit layout. Summary of the invention

[0004] In view of this, the present application provides a demolition machine hydraulic circuit and a demolition machine, aiming to solve, to a certain extent, the technical problem that in the prior art, the working device and the retractable lower chassis of the demolition machine are controlled by a separate control oil circuit, which requires the addition of multiple control valves and the oil circuit layout occupies a large space.

[0005] In a first aspect, the present application provides a demolition machine hydraulic circuit, including a chassis circuit and a first actuator circuit, the demolition machine hydraulic circuit further comprising:

[0006] a first pressure source, for supplying hydraulic medium to the chassis circuit and the first actuator circuit;

[0007] A first hydraulic medium accommodating mechanism, used for accommodating the hydraulic medium returned from the chassis circuit and the first actuator circuit;

[0008] a conversion assembly, in communication with the first pressure source, the first hydraulic medium containing mechanism, the first actuator circuit and the chassis circuit;

[0009] In the first state of the conversion assembly, the first pressure source and the first hydraulic medium containing mechanism are both connected to the first actuator circuit to drive the first actuator;

[0010] In the second state of the conversion assembly, the first pressure source and the first hydraulic medium containing mechanism are both in communication with the chassis circuit to drive the chassis.

[0011] Preferably, the third port of the conversion component is communicated with the first port of the first actuator circuit via a fifth path, and the fourth port of the conversion component is communicated with the second port of the first actuator circuit via a sixth path;

[0012] The fifth port of the conversion assembly is communicated with the first port of the chassis circuit via a seventh path, and the sixth port of the conversion assembly is communicated with the second port of the chassis circuit via an eighth path.

[0013] Preferably, the demolition machine hydraulic circuit further comprises a first reversing component, the liquid inlet end of the first reversing component is connected to the first pressure source via a first path, and the liquid return end of the first reversing component is connected to the first hydraulic medium accommodating mechanism via a second path;

[0014] The first port of the conversion component is communicated with the first port of the first switching component via a third path, and the second port of the conversion component is communicated with the second port of the first switching component via a fourth path;

[0015] In the first state of the first reversing assembly, the first pressure source is communicated with the first port of the conversion assembly, and the first hydraulic medium containing mechanism is communicated with the second port of the conversion assembly;

[0016] In the second state of the first reversing assembly, the first pressure source is communicated with the second port of the conversion assembly, and the first hydraulic medium containing mechanism is communicated with the first port of the conversion assembly.

[0017] Preferably, a first one-way throttling component is arranged on the fifth path, the first one-way throttling component comprises a first one-way member and a first throttling member connected in parallel with each other, the opening direction of the first one-way member is from the first actuator circuit to the conversion component, and the first throttling member is used to reduce the flow of the hydraulic medium flowing through itself;

[0018] A second one-way throttling assembly is arranged on the sixth path, and the second one-way throttling assembly includes a second one-way component and a second throttling component connected in parallel with each other, the opening direction of the second one-way component is the same as the opening direction of the first one-way component, and the second throttling component is used to reduce the flow rate of the hydraulic medium flowing through itself.

[0019] Preferably, the demolition machine hydraulic circuit also includes:

[0020] a second reversing assembly, wherein a liquid inlet end of the second reversing assembly is connected to the first pressure source via a ninth path, and a liquid return end of the second reversing assembly is connected to the first hydraulic medium containing mechanism via a tenth path;

[0021] a second actuator circuit, wherein the first port of the second switching component is communicated with the first port of the second actuator circuit via an eleventh path, and the second port of the second switching component is communicated with the second port of the second actuator circuit via a twelfth path;

[0022] In the first state of the second reversing assembly, the first pressure source is communicated with the first port of the second actuator circuit, and the first hydraulic medium containing mechanism is communicated with the second port of the second actuator circuit;

[0023] In the second state of the second reversing assembly, the first pressure source is communicated with the second port of the second actuator circuit, and the first hydraulic medium containing mechanism is communicated with the first port of the second actuator circuit.

[0024] Preferably, a third one-way throttling component is provided on the tenth path, the third one-way throttling component comprises a third one-way member and a third throttling member connected in parallel with each other, the opening direction of the third one-way member is from the second reversing member to the second actuator circuit, and the third throttling member is used to reduce the flow of the hydraulic medium flowing through itself;

[0025] The eleventh path is provided with a fourth one-way throttling assembly, the fourth one-way throttling assembly comprising a fourth one-way component and a fourth throttling component connected in parallel with each other, the opening direction of the fourth one-way component is the same as the opening direction of the third one-way component, and the fourth throttling component is used to reduce the flow rate of the hydraulic medium flowing through the fourth throttling component;

[0026] The second actuator circuit is a two-arm hydraulic cylinder circuit.

[0027] Preferably, the demolition machine hydraulic circuit also includes:

[0028] A third execution component loop;

[0029] a second pressure source, for supplying hydraulic medium to the third actuator circuit;

[0030] The second hydraulic medium receiving mechanism is used to receive the hydraulic medium returning from the third actuator circuit.

[0031] Preferably, the demolition machine hydraulic circuit further comprises a third reversing assembly, the liquid inlet end of the third reversing assembly is connected to the second pressure source via a thirteenth path, and the liquid return end of the third reversing assembly is connected to the second hydraulic medium accommodating mechanism via a fourteenth path;

[0032] The first port of the third actuator circuit is communicated with the first port of the third switching component via a fifteenth path, and the second port of the third actuator circuit is communicated with the second port of the third switching component via a sixteenth path;

[0033] In the first state of the third reversing assembly, the second pressure source is communicated with the first port of the third actuator circuit, and the second hydraulic medium containing mechanism is communicated with the second port of the third actuator circuit;

[0034] In the second state of the third reversing assembly, the second pressure source is communicated with the second port of the third actuator circuit, and the second hydraulic medium containing mechanism is communicated with the first port of the third actuator circuit.

[0035] Preferably, the chassis circuit is a crawler telescopic hydraulic cylinder circuit;

[0036] The first actuator circuit is a hydraulic motor circuit, and the third actuator circuit is a shearing blade hydraulic cylinder circuit; or

[0037] The first actuator circuit is a shear blade hydraulic cylinder circuit, and the third actuator circuit is a hydraulic motor circuit.

[0038] In a second aspect, the present application provides a demolition machine, comprising the demolition machine hydraulic circuit as described above.

[0039] The present application converts the conversion component between the first state and the second state, so that the first pressure source can respectively drive the chassis circuit and the first actuator component circuit, and applies the demolition machine hydraulic circuit to the demolition machine. This to a certain extent solves the technical problem in the prior art that the working device and the retractable undercarriage chassis of the demolition machine are controlled by a separate control oil circuit, which requires the addition of multiple control valves, resulting in a large space occupied by the oil circuit layout.

[0040] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the hydraulic circuit of the demolition machine of the present application is shown;

[0043] Figure 2 A schematic diagram showing a first switching component and a second switching component of the present application is shown;

[0044] Figure 3 A schematic diagram of the conversion assembly of the present application is shown;

[0045] Figure 4 A schematic diagram of a third switching assembly of the present application is shown.

[0046] Reference numerals:

[0047] 1-first path; 2-second path; 201-one-way valve; 202-oil filter; 3-third path; 4-fourth path; 5-fifth path; 501-first one-way throttle valve; 6-sixth path; 601-second one-way throttle valve; 7-seventh path; 8-eighth path; 9-ninth path; 10-tenth path; 11-eleventh path; 1101-third one-way throttle valve; 12-twelfth path; 1201-fourth one-way throttle valve; 13-thirteenth path; 14-fourteenth path; 15-fifteenth path; 1501-fifth one-way throttle valve; 16-sixteenth path; 1601-sixth one-way throttle valve; 17-seventeenth path;

[0048] 18-first pressure source; 19-oil tank; 20-first three-position four-way valve; 21-first one-way relief valve; 22-second one-way relief valve; 23-first two-position three-way ball valve; 24-second two-position three-way ball valve; 25-second three-position four-way valve; 26-third one-way relief valve; 27-fourth one-way relief valve; 28-second pressure source; 29-crawler telescopic hydraulic cylinder group; 30-hydraulic motor circuit; 31-two-arm telescopic hydraulic cylinder; 32-shear telescopic hydraulic cylinder group; 33-third three-position four-way valve;

[0049] Pi-total control pressure source; PA1-first control pressure source; PB1-second control pressure source; PA2-third control pressure source; PB2-fourth control pressure source; PA3-fifth control pressure source; PB3-sixth control pressure source. DETAILED DESCRIPTION

[0050] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0051] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0054] Figure 1 A schematic diagram of the hydraulic circuit of the demolition machine of the present application is shown; Figure 2 A schematic diagram showing a first switching component and a second switching component of the present application is shown; Figure 3 A schematic diagram of the conversion assembly of the present application is shown; Figure 4 FIG. 2 shows a schematic diagram of a third switching assembly of the present application. Figures 1 to 4 The hydraulic circuit of the demolition machine provided in this embodiment includes: a first pressure source, a first hydraulic medium accommodating mechanism, a second pressure source, a second hydraulic medium accommodating mechanism, a conversion component, a first reversing component, a second reversing component, a third reversing component, a chassis circuit, a first actuator circuit, a second actuator circuit, and a third directional component circuit. The connection relationship and working principle of the above components will be described in detail below. In addition, in the embodiment, the hydraulic medium is described by taking hydraulic oil as an example.

[0055] In the embodiment, since there are many components involved, for the convenience of description, they are described uniformly here. The first hydraulic medium containing mechanism and the second hydraulic medium containing mechanism can both be the oil tank 19 of the demolition machine described below, the first reversing assembly can include a first three-position four-way valve 20, the second reversing assembly can include a second three-position four-way valve 25, and the third reversing assembly can include a third three-position four-way valve 33. The conversion assembly can include a first two-position three-way ball valve 23 and a second two-position three-way ball valve 24. The chassis circuit can be a crawler telescopic hydraulic cylinder group 29, and the second actuator circuit can include a two-arm telescopic hydraulic cylinder 31.

[0056] In the first embodiment, the first actuator circuit may be a hydraulic motor circuit 30, and the third actuator circuit may be a shearing blade telescopic hydraulic cylinder group 32. This embodiment is equivalent to the hydraulic motor circuit 30 and the crawler telescopic hydraulic cylinder group 29 being driven by the first pressure source 18. In the second embodiment, the first actuator circuit may be a shearing blade telescopic hydraulic cylinder group 32, and the third actuator circuit may be a hydraulic motor circuit 30. This embodiment is equivalent to the shearing blade telescopic hydraulic cylinder group 32 and the crawler telescopic hydraulic cylinder group 29 being driven by the first pressure source 18. The first embodiment will be taken as an example to describe the hydraulic circuit of the demolition machine.

[0057] In the embodiment, according to the above-described features, in order to further facilitate the description, the following will be combined with Figures 1 to 4 The expression method of each port is explained uniformly.

[0058] As for the conversion assembly, the conversion assembly can be a conversion valve formed by integrating the two two-position three-way ball valves mentioned above:

[0059] The first port of the conversion assembly may be the P end of the first two-position three-way ball valve 23 , and the second port of the conversion assembly may be the P end of the second two-position three-way ball valve 24 ;

[0060] The third port of the conversion assembly may be the A end of the first two-position three-way ball valve 23, and the fourth port of the conversion assembly may be the A end of the second two-position three-way ball valve 24;

[0061] The fifth port of the conversion assembly may be the B end of the first two-position three-way ball valve 23 , and the sixth port of the conversion assembly may be the B end of the second two-position three-way ball valve 24 .

[0062] Regarding the first reversing assembly, the first reversing assembly includes, in addition to the first three-position four-way valve 20, a control oil circuit. The setting of the control oil circuit will be explained in the following description:

[0063] The liquid inlet end of the first reversing component may be the P end of the first three-position four-way valve 20, and the liquid return end of the first reversing component may be the T end of the first three-position four-way valve 20;

[0064] The first port of the first reversing component may be the A end of the first three-position four-way valve 20 , and the second port of the first reversing component may be the B end of the first three-position four-way valve 20 .

[0065] As for the second reversing assembly, the second reversing assembly includes not only the second three-position four-way valve 25, but also a control oil circuit. The setting of the control oil circuit will also be explained in the following description:

[0066] The liquid inlet end of the second reversing component may be the P end of the second three-position four-way valve 25, and the liquid return end of the second reversing component may be the T end of the second three-position four-way valve 25;

[0067] The first port of the second reversing component may be the A end of the second three-position four-way valve 25 , and the second port of the second reversing component may be the B end of the second three-position four-way valve 25 .

[0068] Regarding the third reversing assembly, the third reversing assembly includes not only the third three-position four-way valve 33, but also a control oil circuit. The setting of the control oil circuit will also be explained in the following description:

[0069] The liquid inlet end of the third reversing component may be the P end of the third three-position four-way valve 33, and the liquid return end of the third reversing component may be the T end of the third three-position four-way valve 33;

[0070] The first port of the third reversing component may be the A end of the third three-position four-way valve 33 , and the second port of the third reversing component may be the B end of the third three-position four-way valve 33 .

[0071] Based on the features described above, the communication relationship between the above components will be described in detail below.

[0072] The hydraulic motor circuit 30 includes a hydraulic motor. In an embodiment, the output end of the hydraulic motor can be connected to a hydraulic shear (not shown in the figure). When the hydraulic motor rotates, the hydraulic shear can rotate synchronously, which is conducive to finding the removal position. The hydraulic motor can include two ports. In an embodiment, the A end of the hydraulic motor can be the first port of the hydraulic motor circuit 30, and the B end of the hydraulic motor can be the second port of the hydraulic motor circuit 30. The A end of the hydraulic motor can be connected to the A end of the first two-position three-way ball valve 23 via the fifth path 5, and the B end of the hydraulic motor can be connected to the A end of the second two-position three-way ball valve 24 via the sixth path 6.

[0073] The above-mentioned crawler telescopic hydraulic cylinder group 29 may include two single-rod hydraulic cylinders, the rodless chambers of the two single-rod hydraulic cylinders may be combined via pipelines to form the A end of the crawler telescopic hydraulic cylinder group 29, and the rod chambers of the two single-rod hydraulic cylinders may be combined via pipelines to form the B end of the crawler telescopic hydraulic cylinder group 29. The first port of the crawler telescopic hydraulic cylinder group 29 may be the A end of the crawler telescopic hydraulic cylinder group 29, and the second port of the crawler telescopic hydraulic cylinder group 29 may be the B end of the crawler telescopic hydraulic cylinder group 29. The A end of the crawler telescopic hydraulic cylinder group 29 may be connected to the B end of the first two-position three-way ball valve 23 via the seventh path 7, and the B end of the crawler telescopic hydraulic cylinder group 29 may be connected to the B end of the second two-position three-way ball valve 24 via the eighth path 8.

[0074] In the embodiment, the switching of the valve core positions of the first two-position three-way ball valve 23 and the second two-position three-way ball valve 24 can be realized by manual operation of the operator, which is helpful for the operator to adjust the working process of the crawler telescopic hydraulic cylinder group 29 and the hydraulic motor circuit 30 according to the specific working conditions.

[0075] In the embodiment, the A end of the first three-position four-way valve 20 can be communicated with the P end of the first two-position three-way ball valve 23 via the third path 3, and the B end of the first three-position four-way valve 20 can be communicated with the P end of the second two-position three-way ball valve 24 via the fourth path 4. The P end of the first three-position four-way valve 20 can be communicated with the first pressure source 18 via the first path 1, and the T end of the first three-position four-way valve 20 can be communicated with the oil tank 19 via the second path 2.

[0076] In the embodiment, the movement of the valve core of the first three-position four-way valve 20 is realized by controlling the oil circuit. A first control pressure source PA1 is provided at the upper end of the valve core of the first three-position four-way valve 20 shown in the figure, and a second control pressure source PB1 is provided at the lower end of the valve core of the first three-position four-way valve 20. Thus, when the first control pressure source PA1 is turned on, the valve core of the first three-position four-way valve 20 will move downward, and vice versa, when the second control pressure source PB1 is turned on, the valve core of the first three-position four-way valve 20 will move upward.

[0077] In addition, considering that the flow rate of hydraulic oil required by the hydraulic motor circuit 30 is smaller than that of the crawler telescopic hydraulic cylinder group 29, when both are supplied by the first pressure source 18, a first one-way throttle valve 501 and a second one-way throttle valve 601 can be respectively provided on the fifth path 5 and the sixth path 6. In the embodiment, since the working principle and setting method of the two one-way throttle valves are the same, only the first one-way throttle valve 501 is used as an example for description, and the description of the second one-way throttle valve 601 is omitted. The first one-way throttle valve 501 includes a first one-way valve and a first throttle valve connected in parallel to each other. The opening direction of the first one-way valve can be directed along the hydraulic motor to the first two-position three-way ball valve 23. The first throttle valve is used to throttle the hydraulic oil flowing through itself.

[0078] Based on the features described above, the operation process of the hydraulic motor circuit 30 will be described below.

[0079] In the embodiment, the first three-position four-way valve 20 may have a Y-type middle position function, so that the external hydraulic actuator can be in a "floating state". Based on the positions of the components shown in the figure (the position conversion valve shown in the figure is in the first state), the first control pressure source PA1 is turned on, the valve core of the first three-position four-way valve 20 moves downward, and the first three-position four-way valve 20 enters the first state from the middle position. The pressure oil is supplied from the first pressure source 18, flows into the third path 3 through the first path 1, and then flows into the P end of the first two-position three-way ball valve 23 through the third path 3 and flows out from the A end of the first two-position three-way ball valve 23. Then, the pressure oil flows into the fifth path 5 and flows into the A end of the hydraulic motor after being throttled by the first one-way throttle valve 501 on the fifth path 5, driving the hydraulic motor to rotate along the first direction. The hydraulic oil after working flows into the A end of the second two-position three-way ball valve 24 via the sixth path 6, then flows out from the P end of the second two-position three-way ball valve 24, flows into the B end of the first three-position four-way valve 20 via the fourth path 4, and finally the hydraulic oil flows out from the T end of the first three-position four-way valve 20 and flows back to the oil tank 19 via the second path 2.

[0080] Based on the positions of the components shown in the figure, the second control pressure source PB1 is turned on, the valve core of the first three-position four-way valve 20 moves upward, and the first three-position four-way valve 20 enters the second state from the middle position. When the pressure oil is normally supplied from the first pressure source 18, the intermediate flow process of the pressure oil can refer to the above description. The pressure oil will flow into the sixth path 6 and flow into the hydraulic motor after being throttled by the second one-way throttle valve 601. The pressure oil after work flows into the fifth path 5 and finally flows back to the oil tank 19. In this way, the hydraulic motor is driven to rotate in the second direction, which is opposite to the first direction.

[0081] Based on the features described above, the working process of the crawler track extension and retraction hydraulic cylinder group 29 will be described below.

[0082] Based on the positions of the components shown in the figure, the first control pressure source PA1 is turned on, the valve core of the first three-position four-way valve 20 moves downward, and the first three-position four-way valve 20 enters the first state from the middle position. The valve core of the first two-position three-way ball valve 23 is manually adjusted to connect the P end and the B end of the first two-position three-way ball valve 23, and to connect the P end and the B end of the second two-position three-way ball valve 24, and the conversion valve enters the second state.

[0083] The pressure oil is supplied from the first pressure source 18, flows into the third path 3 via the first path 1, flows into the P end of the first two-position three-way ball valve 23 via the third path 3 and flows out from the B end of the first two-position three-way ball valve 23, then flows into the seventh path 7 and flows into the crawler telescopic hydraulic cylinder group 29 via the A end of the crawler telescopic hydraulic cylinder group 29, the hydraulic oil in the rod chamber of the crawler telescopic hydraulic cylinder group 29 flows out to the eighth path 8 via the B end of the crawler telescopic hydraulic cylinder group 29, the hydraulic oil flows into the B end of the second two-position three-way ball valve 24 via the eighth path 8, then flows out from the P end of the second two-position three-way ball valve 24 to the fourth path 4, flows into the B end of the first three-position four-way valve 20 via the fourth path 4, and finally the hydraulic oil flows out from the T end of the first three-position four-way valve 20 and flows back to the oil tank 19 via the second path 2. In this way, the crawlers on both sides of the chassis of the demolition machine described below are extended outward.

[0084] Based on the positions of the components shown in the figure, the first control pressure source PA1 is turned on, the valve core of the first three-position four-way valve 20 moves upward, and the first three-position four-way valve 20 enters the second state from the middle position. The conversion valve is still adjusted to the above-mentioned second state. When the pressure oil is normally supplied from the first pressure source 18, the intermediate flow process of the pressure oil can refer to the above description. The pressure oil will flow into the B end of the crawler telescopic hydraulic cylinder group 29 through the eighth path 8, and the hydraulic oil in the rodless chamber of the crawler telescopic hydraulic cylinder group 29 will be pressed into the seventh path 7 through the A end of the crawler telescopic hydraulic cylinder group 29, and finally flow back to the oil tank 19. In this way, the crawlers on both sides of the chassis of the demolition machine described below are retracted inward.

[0085] In an embodiment, the hydraulic circuit of the dismantling machine also includes a seventeenth path 17, a first one-way overflow valve 21 and a second one-way overflow valve 22. The seventeenth path 17 is also connected to the oil tank 19. The first one-way overflow valve 21 can be set between the third path 3 and the seventeenth path 17, and the second one-way overflow valve 22 can be set between the third path 3 and the seventeenth path 17. The first one-way overflow valve 21 and the second one-way overflow valve 22 overflow when a preset pressure is reached to protect the hydraulic circuit of the dismantling machine.

[0086] On the basis of the features described above, the communication relationship between the two-arm telescopic hydraulic cylinder 31 and the shear blade telescopic hydraulic cylinder group 32 will be described below.

[0087] In the embodiment, the port of the rodless chamber of the two-arm telescopic hydraulic oil cylinder 31 may be the A end, and the port of the rod chamber of the two-arm telescopic hydraulic oil cylinder 31 may be the B end, so that the first port of the two-arm telescopic hydraulic oil cylinder 31 may be the A end, and the second port of the two-arm telescopic hydraulic oil cylinder 31 may be the B end. The A end of the two-arm telescopic hydraulic oil cylinder 31 may be connected to the A end of the second three-position four-way valve 25 via the eleventh path 11, the B end of the two-arm telescopic hydraulic oil cylinder 31 may be connected to the B end of the second three-position four-way valve 25 via the twelfth path 12, the P end of the second three-position four-way valve 25 may be connected to the first pressure source 18 via the ninth path 9, and the T end of the second three-position four-way valve 25 may be connected to the oil tank 19 via the tenth path 10.

[0088] The shear blade telescopic hydraulic cylinder group 32 may include two single-rod hydraulic cylinders, the rodless chambers of the two single-rod hydraulic cylinders may be combined via pipelines to form the A end of the shear blade telescopic hydraulic cylinder group 32, and the rod chambers of the two single-rod hydraulic cylinders may be combined via pipelines to form the B end of the shear blade telescopic hydraulic cylinder group 32. The first port of the shear blade telescopic hydraulic cylinder group 32 may be the A end of the shear blade telescopic hydraulic cylinder group 32, and the second port of the shear blade telescopic hydraulic cylinder group 32 may be the B end of the shear blade telescopic hydraulic cylinder group 32. The A end of the shear blade telescopic hydraulic cylinder group 32 can be connected to the A end of the third three-position four-way valve 33 via the fifteenth path 15, the B end of the shear blade telescopic hydraulic cylinder group 32 can be connected to the B end of the third three-position four-way valve 33 via the sixteenth path 16, the P end of the third three-position four-way valve 33 can be connected to the second pressure source 28 via the thirteenth path 13, and the T end of the third three-position four-way valve 33 can be connected to the oil tank 19 via the fourteenth path 14.

[0089] In addition, a third one-way throttle valve 1101 is also provided on the eleventh path 11, a fourth one-way throttle valve 1201 is also provided on the twelfth path 12, a fifth one-way throttle valve 1501 is also provided on the fifteenth path 15, and a sixth one-way throttle valve 1601 is also provided on the sixteenth path 16. The above four one-way throttle valves are intended to adjust the flow of their respective circuits. Their working principles and structures are the same as those of the above-mentioned first one-way throttle valve 501 and the second one-way throttle valve 601 (that is, each one-way throttle valve includes a one-way valve and a throttle valve). They will not be described in detail here, and only the opening directions of their respective one-way valves will be explained. The opening directions of the third one-way valve and the fourth one-way valve can be directed to the two-arm telescopic hydraulic cylinder 31 along the second three-position four-way valve 25, and the opening directions of the fifth one-way valve and the sixth one-way valve can be directed to the shear blade telescopic hydraulic cylinder group 32 along the third three-position four-way valve 33.

[0090] In an embodiment, the hydraulic circuit of the demolition machine also includes a third one-way overflow valve 26 and a fourth one-way overflow valve 27. The third one-way overflow valve 26 can be set between the eleventh path 11 and the seventeenth path 17, and the fourth one-way overflow valve 27 can be set between the twelfth path 12 and the seventeenth path 17. The third one-way overflow valve 26 and the fourth one-way overflow valve 27 overflow when a preset pressure is reached to protect the hydraulic circuit of the demolition machine.

[0091] In the embodiment, similar to the first three-position four-way valve 20, the second three-position four-way valve 25 and the third three-position four-way valve 33 can also be controlled by the control oil circuit. The upper end and the lower end of the second three-position four-way valve 25 are respectively provided with the third control pressure source PA2 and the fourth control pressure source PB2, and the upper end and the lower end of the third three-position four-way valve 33 are respectively provided with the fifth control pressure source PA3 and the sixth control pressure source PB3. Therefore, the action mode of the valve cores of the second three-position four-way valve 25 and the third three-position four-way valve 33 can be the same as that of the first three-position four-way valve 20.

[0092] In the embodiment, taking the second three-position four-way valve 25 as an example, the third control pressure source PA2 and the fourth control pressure source PB2 can be connected to the total control pressure source Pi, and the total control pressure source Pi can be connected to the third control pressure source PA2 or the total control pressure source Pi can be connected to the fourth control pressure source PB2 by adjusting the switch. Although the connection method is not shown, in the embodiment, the connection method of the first control pressure source PA1 and the second control pressure source PB1 with the total control pressure source Pi, and the connection method of the fifth control pressure source PA3 and the sixth control pressure source PB3 with the total control pressure source Pi can all be the same as the setting method of the third control pressure source PA2 and the fourth control pressure source PB2.

[0093] Based on the features described above, the working process of the two-arm telescopic hydraulic cylinder 31 and the shear blade telescopic hydraulic cylinder group 32 will be described below.

[0094] The working process of the two-arm telescopic hydraulic cylinder 31 and the shearing blade telescopic hydraulic cylinder group 32 is similar to the working process of the above-mentioned crawler telescopic hydraulic cylinder group 29, except that the third three-position four-way valve 33 is driven by the second pressure source 28, and the second three-position four-way valve 25 and the third three-position four-way valve 33 can both have a locking function (the corresponding middle position function is "O type"), so that the hydraulic actuators of the corresponding circuit can be relatively still in the middle position state, that is, the two arms and shearing blades of the corresponding demolition machine are relatively still, ensuring a certain reliability during construction. In addition, the first three-position four-way valve 20 and the second three-position four-way valve 25 can be integrated into a reversing valve.

[0095] According to the features described above, in order to further ensure the reliability of the hydraulic circuit of the demolition machine, an oil filter 202 for filtering the return oil and a one-way valve 201 for preventing the hydraulic oil in the oil tank 19 from flowing back along the second path 2 are also provided on the second path 2. In addition, each of the above paths can be a hydraulic pipeline.

[0096] The hydraulic circuit of the demolition machine provided in this embodiment controls the hydraulic motor circuit 30, the crawler telescopic hydraulic cylinder group 29 and the two-arm telescopic hydraulic cylinder 31 of the demolition machine with a unified pressure source. Compared with the separate control method, the circuit is simplified, the number of control valves and the space occupied by the circuit are reduced, and the component cost and the dismantling and picking cost are greatly reduced.

[0097] This embodiment also provides a dismantling machine, including the above dismantling machine hydraulic circuit, and also including the above beneficial effects, which will not be repeated here. The above first pressure source 18 and the second pressure source 28 can both be provided by the dismantling machine hydraulic system, the adjustment switches of the above three three-position four-way valves can be integrated in the form of buttons on the handle of the cab of the dismantling machine, and the manual switches of the conversion valve corresponding to the two two-position three-way ball valves can also be set in the cab of the dismantling machine for easy operation.

[0098] The above description is only a preferred embodiment of the present application, and does not limit the protection scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the innovative concept of the present application, or direct / indirect application in other related technical fields are included in the protection scope of the present application.

Claims

1. A hydraulic circuit of a demolition machine, comprising a chassis circuit and a first actuator circuit, characterized in that: The demolition machine hydraulic circuit also includes: a first pressure source, for supplying hydraulic medium to the chassis circuit and the first actuator circuit; A first hydraulic medium accommodating mechanism, used for accommodating the hydraulic medium returned from the chassis circuit and the first actuator circuit; a conversion assembly, in communication with the first pressure source, the first hydraulic medium containing mechanism, the first actuator circuit and the chassis circuit; In the first state of the conversion assembly, the first pressure source and the first hydraulic medium containing mechanism are both connected to the first actuator circuit to drive the first actuator; In the second state of the conversion assembly, the first pressure source and the first hydraulic medium containing mechanism are both in communication with the chassis circuit to drive the chassis.

2. The hydraulic circuit of the demolition machine according to claim 1, characterized in that: The third port of the conversion component is communicated with the first port of the first actuator circuit via a fifth path, and the fourth port of the conversion component is communicated with the second port of the first actuator circuit via a sixth path; The fifth port of the conversion assembly is communicated with the first port of the chassis circuit via a seventh path, and the sixth port of the conversion assembly is communicated with the second port of the chassis circuit via an eighth path.

3. The hydraulic circuit of the demolition machine according to claim 2, characterized in that: The hydraulic circuit of the demolition machine further includes a first reversing component, a liquid inlet end of the first reversing component is connected to the first pressure source via a first path, and a liquid return end of the first reversing component is connected to the first hydraulic medium accommodating mechanism via a second path; The first port of the conversion component is communicated with the first port of the first switching component via a third path, and the second port of the conversion component is communicated with the second port of the first switching component via a fourth path; In the first state of the first reversing assembly, the first pressure source is communicated with the first port of the conversion assembly, and the first hydraulic medium containing mechanism is communicated with the second port of the conversion assembly; In the second state of the first reversing assembly, the first pressure source is communicated with the second port of the conversion assembly, and the first hydraulic medium containing mechanism is communicated with the first port of the conversion assembly.

4. The hydraulic circuit of the demolition machine according to claim 3, characterized in that: The fifth path is provided with a first one-way throttling assembly, the first one-way throttling assembly comprising a first one-way component and a first throttling component connected in parallel with each other, the opening direction of the first one-way component is from the first actuator circuit to the conversion component, and the first throttling component is used to reduce the flow of the hydraulic medium flowing through itself; A second one-way throttling assembly is arranged on the sixth path, and the second one-way throttling assembly includes a second one-way component and a second throttling component connected in parallel with each other, the opening direction of the second one-way component is the same as the opening direction of the first one-way component, and the second throttling component is used to reduce the flow rate of the hydraulic medium flowing through itself.

5. The hydraulic circuit of the demolition machine according to claim 3, characterized in that: The demolition machine hydraulic circuit also includes: a second reversing assembly, wherein a liquid inlet end of the second reversing assembly is connected to the first pressure source via a ninth path, and a liquid return end of the second reversing assembly is connected to the first hydraulic medium containing mechanism via a tenth path; a second actuator circuit, wherein the first port of the second switching component is communicated with the first port of the second actuator circuit via an eleventh path, and the second port of the second switching component is communicated with the second port of the second actuator circuit via a twelfth path; In the first state of the second reversing assembly, the first pressure source is communicated with the first port of the second actuator circuit, and the first hydraulic medium containing mechanism is communicated with the second port of the second actuator circuit; In the second state of the second reversing assembly, the first pressure source is communicated with the second port of the second actuator circuit, and the first hydraulic medium containing mechanism is communicated with the first port of the second actuator circuit.

6. The hydraulic circuit of the demolition machine according to claim 5, characterized in that: The tenth path is provided with a third one-way throttling assembly, the third one-way throttling assembly includes a third one-way component and a third throttling component connected in parallel with each other, the opening direction of the third one-way component is from the second reversing component to the second actuator component circuit, and the third throttling component is used to reduce the flow of the hydraulic medium flowing through itself; The eleventh path is provided with a fourth one-way throttling assembly, the fourth one-way throttling assembly comprising a fourth one-way component and a fourth throttling component connected in parallel with each other, the opening direction of the fourth one-way component is the same as the opening direction of the third one-way component, and the fourth throttling component is used to reduce the flow rate of the hydraulic medium flowing through the fourth throttling component; The second actuator circuit is a two-arm hydraulic cylinder circuit.

7. The hydraulic circuit of a demolition machine according to claim 1, characterized in that: The demolition machine hydraulic circuit also includes: A third execution component loop; a second pressure source, for supplying hydraulic medium to the third actuator circuit; The second hydraulic medium receiving mechanism is used to receive the hydraulic medium returning from the third actuator circuit.

8. The hydraulic circuit of the demolition machine according to claim 7, characterized in that: The demolition machine hydraulic circuit further includes a third reversing component, a liquid inlet end of the third reversing component is connected to the second pressure source via a thirteenth path, and a liquid return end of the third reversing component is connected to the second hydraulic medium accommodating mechanism via a fourteenth path; The first port of the third actuator circuit is communicated with the first port of the third switching component via a fifteenth path, and the second port of the third actuator circuit is communicated with the second port of the third switching component via a sixteenth path; In the first state of the third reversing assembly, the second pressure source is communicated with the first port of the third actuator circuit, and the second hydraulic medium containing mechanism is communicated with the second port of the third actuator circuit; In the second state of the third reversing assembly, the second pressure source is communicated with the second port of the third actuator circuit, and the second hydraulic medium containing mechanism is communicated with the first port of the third actuator circuit.

9. The hydraulic circuit of the demolition machine according to claim 8, characterized in that: The chassis circuit is a crawler telescopic hydraulic cylinder circuit; The first actuator circuit is a hydraulic motor circuit, and the third actuator circuit is a shearing blade hydraulic cylinder circuit; or The first actuator circuit is a shear blade hydraulic cylinder circuit, and the third actuator circuit is a hydraulic motor circuit.

10. A dismantling machine, characterized in that: The demolition machine comprises a hydraulic circuit as claimed in any one of claims 1 to 9.

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