Hydraulic mutual assistance system, hydraulic mutual assistance method and engineering trolley

Abstract

The embodiment of the invention provides a hydraulic mutual assistance system, a hydraulic mutual assistance method and an engineering trolley, and relates to the field of engineering trolleys. The hydraulic mutual-assistance system comprises a chassis working pump set, a priority valve, a steering brake valve, an auxiliary action valve set, a mutual-assistance reversing valve, a cantilever crane working pump set and a cantilever crane action valve set. Wherein the output end of the arm support working pump set is communicated with the input end of the arm support action valve set, the output end of the chassis working pump set is communicated with the input end of the priority valve, the priority output end of the priority valve is communicated with the steering brake valve, and the non-priority output end of the priority valve is simultaneously communicated with the auxiliary action valve set and one end of the mutual assistance reversing valve. And the other end of the mutual-assistance reversing valve is used for being communicated with the input end of the arm support action valve group in a mutual-assistance operation state.

Description

Technical Field

[0001] The present invention relates to the field of engineering trolleys, and in particular to a hydraulic mutual assistance system, a hydraulic mutual assistance method and an engineering trolley. Background Art

[0002] When the engineering trolley is operating, it is usually driven by the chassis working pump group, the first arm working pump group and the second arm working pump group to complete different actions.

[0003] However, when one of the pump groups is damaged, the corresponding operation of the pump group cannot be completed. In particular, when one of the arm pump groups is damaged, the operating range of the other arm pump group cannot be fully covered, which has a negative impact on the progress of tunnel construction. Summary of the invention

[0004] The present invention provides a hydraulic mutual assistance system, a hydraulic mutual assistance method and an engineering trolley, which can perform hydraulic mutual assistance between different working pump groups to avoid negative impact on the progress of tunnel construction due to damage to one of the working pump groups.

[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, an embodiment of the present invention provides a hydraulic mutual assistance system, comprising: Chassis working pump group, priority valve, steering brake valve, auxiliary action valve group, mutual assistance reversing valve, boom working pump group and boom action valve group; Among them, the output end of the boom working pump group is connected with the input end of the boom action valve group, the output end of the chassis working pump group is connected with the input end of the priority valve, the priority output end of the priority valve is connected with the steering brake valve, the non-priority output end of the priority valve is simultaneously connected with the auxiliary action valve group and one end of the mutual assistance reversing valve, and the other end of the mutual assistance reversing valve is used to communicate with the input end of the boom action valve group under the mutual assistance operation state.

[0006] Optionally, the boom working pump group includes a first arm working pump group and a second arm working pump group, and the boom actuation valve group includes a first arm actuation valve group and a second arm actuation valve group; Among them, the output end of the first arm working pump group is connected with the input end of the first arm action valve group, the output end of the second arm working pump group is connected with the input end of the second arm action valve group, and the mutual assistance reversing valve is used to selectively connect with the input end of the first arm action valve group and the input end of the second arm action valve group in the mutual assistance operation state.

[0007] Optionally, the auxiliary action valve group includes a first auxiliary valve group and a second auxiliary valve group arranged in parallel, the output end of the first auxiliary valve group is connected to the first rear leg lifting unit and the second rear leg lifting unit at the same time, and the output end of the second auxiliary valve group is connected to the sliding action unit.

[0008] Optionally, the hydraulic mutual assistance system includes a pressure building valve and an oil cylinder, the pressure building valve is arranged in the pipeline between the priority valve and the first auxiliary valve group, the pressure building valve is used to connect with the oil cylinder in a non-working state, and the pressure reducing valve is used to regulate the oil flow entering the first auxiliary valve group in a working state.

[0009] Optionally, the hydraulic mutual assistance system further comprises a variable pressure on-off valve, a first relief valve and a second relief valve, wherein the variable pressure on-off valve and the first relief valve are sequentially arranged in a pipeline between the priority valve and the first auxiliary valve group, and the second relief valve is arranged in a pipeline between the priority valve and the second auxiliary valve group; The first rear leg lifting unit and the second rear leg lifting unit are used to drive the variable pressure on-off valve to be turned on in a low-pressure working state, and drive the first overflow valve to work; or, the sliding action unit is used to drive the variable pressure on-off valve to be turned off in a high-pressure working state, and drive the second overflow valve to be paused.

[0010] Optionally, the hydraulic mutual assistance system further comprises a first variable pump, a first rock drilling control valve and a third relief valve, wherein the first variable pump is connected to the rock drilling valve and the first arm action valve group through a first load feedback oil circuit, and the third relief valve is arranged at the first load feedback second; And / or, the hydraulic mutual assistance system also includes a second variable pump, a second rock drilling control valve and a fourth overflow valve, the second variable pump is connected to the rock drilling control valve and the second arm action valve group at the same time through a second load feedback oil circuit, and the fourth overflow valve is arranged in the second load feedback oil circuit.

[0011] Optionally, the hydraulic mutual assistance system further comprises a first rock drilling unit and a first on-off valve, the first variable pump is connected between the first arm working pump group and the first rock drilling unit, and the first on-off valve is arranged in the first load feedback oil circuit; And / or, the hydraulic mutual assistance system further comprises a second rock drilling unit and a second on-off valve, the second variable pump is connected between the second arm working pump group and the second rock drilling unit, and the second on-off valve is arranged in the second load feedback oil circuit; And / or, a first mutual assistance branch is connected between the first variable pump and the second variable pump, and a first mutual assistance on-off valve is provided on the first mutual assistance branch; And / or, a second mutual assistance branch is connected between the first rock drilling control valve and the second rock drilling control valve, and a second mutual assistance on-off valve is arranged on the second mutual assistance branch.

[0012] Optionally, the hydraulic mutual assistance system further comprises a first arm drive unit, a first rock drilling drive motor and a first reversing valve, the first arm working pump group, the first arm drive unit, the first reversing valve and the first rock drilling drive motor are sequentially connected, and the first reversing valve can be selectively connected to the forward rotation end and the reverse rotation end of the first rock drilling drive motor; And / or, the hydraulic mutual assistance system also includes a second arm drive unit, a second rock drilling drive motor and a second reversing valve, the second arm working pump group, the second arm drive unit, the second reversing valve and the second rock drilling drive motor are connected in sequence, and the second reversing valve can be selectively connected to the forward rotation end and the reverse rotation end of the second rock drilling drive motor.

[0013] In a second aspect, an embodiment of the present invention further provides a hydraulic mutual assistance method, which is implemented by the hydraulic mutual assistance system, and the hydraulic mutual assistance method includes: Under normal working conditions, the chassis working pump group and the arm working pump group operate independently; In an abnormal working state, the chassis working pump group supplies oil to the arm action valve group through the mutual assistance reversing valve, or the arm working pump group supplies oil to the auxiliary action valve group through the mutual assistance reversing valve.

[0014] In a third aspect, an embodiment of the present invention further provides an engineering trolley, comprising the hydraulic mutual assistance system, and / or for implementing the hydraulic mutual assistance method.

[0015] The beneficial effects of the hydraulic mutual assistance system of the embodiment of the present invention include, for example: The hydraulic mutual assistance system includes: a chassis working pump group, a priority valve, a steering brake valve, an auxiliary action valve group, a mutual assistance reversing valve, a boom working pump group and a boom action valve group; wherein, the output end of the boom working pump group is connected to the input end of the boom action valve group, the output end of the chassis working pump group is connected to the input end of the priority valve, the priority output end of the priority valve is connected to the steering brake valve, the non-priority output end of the priority valve is simultaneously connected to the auxiliary action valve group and one end of the mutual assistance reversing valve, and the other end of the mutual assistance reversing valve is used to communicate with the input end of the boom action valve group under the mutual assistance operation state. Under normal working conditions, the mutual assistance reversing valve does not work, and the chassis working pump group and the boom working pump group respectively drive different valve groups to perform normal operations; when an abnormality occurs, that is, when one of the working pump groups is damaged, the mutual assistance reversing valve is connected to the boom action valve group, so that the boom action valve group can be connected to the auxiliary action valve group to achieve hydraulic mutual assistance, thereby avoiding the negative impact on the progress of tunnel construction due to the damage of one of the working pump groups.

[0016] The double-arm hydraulic trolley includes a hydraulic mutual assistance system and can implement a hydraulic mutual assistance method, thereby improving the efficiency of tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention 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.

[0018] Figure 1 It is a schematic diagram of the hydraulic circuit of the hydraulic mutual assistance system provided in an embodiment of the present invention.

[0019] Icons: 100-Hydraulic mutual assistance system; 110-Chassis working pump group; 111-Priority valve; 112-Steering brake valve; 113-Auxiliary action valve group; 1131-First auxiliary valve group; 1132-Second auxiliary valve group; 1135-Sliding action unit; 114-Mutual assistance reversing valve; 115-Pressure building valve; 116-Cylinder; 117-Variation pressure on-off valve; 118-First relief valve; 119-Second relief valve; 130-first arm working pump group; 131-first arm action valve group; 132-first rock drilling unit; 133-first rear leg lifting unit; 134-first variable pump; 135-first rock drilling control valve; 136-third overflow valve; 137-first load feedback oil circuit; 138-first on-off valve; 139-first arm drive unit; 140-first rock drilling drive motor; 141-first reversing valve; 142-fifth overflow valve; 150-second arm working pump group; 151-second arm action valve group; 152-second rock drilling unit; 153-second rear leg lifting unit; 154-second variable pump; 155-second rock drilling control valve; 156-fourth overflow valve; 157-second load feedback oil circuit; 158-second on-off valve; 159-second arm drive unit; 160-second rock drilling drive motor; 161-second reversing valve; 162-sixth overflow valve; 170 - first mutual aid branch; 171 - first mutual aid on-off valve; 180 - second mutual aid branch; 181 - second mutual aid on-off valve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0024] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0025] The terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0026] Unless otherwise clearly specified and limited, the terms "disposed", "connected" and the like should be understood in a broad sense. For example, "connected" 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 an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0028] Embodiment 1 Please refer to Figure 1 The embodiment of the present invention provides a hydraulic mutual assistance system 100, which includes: a chassis working pump group 110, a priority valve 111, a steering brake valve 112, an auxiliary action valve group 113, a mutual assistance reversing valve 114, a boom working pump group and a boom action valve group.

[0029] Among them, the output end of the boom working pump group is connected with the input end of the boom action valve group, the output end of the chassis working pump group 110 is connected with the input end of the priority valve 111, the priority output end of the priority valve 111 is connected with the steering brake valve 112, and the non-priority output end of the priority valve 111 is simultaneously connected with the auxiliary action valve group 113 and one end of the mutual assistance reversing valve 114. The other end of the mutual assistance reversing valve 114 is used to connect with the input end of the boom action valve group under the mutual assistance operation state.

[0030] Under normal working conditions, the mutual assistance reversing valve 114 does not work, and the chassis working pump group 110 and the arm working pump group respectively drive different valve groups to perform normal operations; when an abnormality occurs, that is, when one of the working pump groups is damaged, the mutual assistance reversing valve 114 is connected with the arm action valve group, so that the arm action valve group can be connected with the auxiliary action valve group 113 to achieve hydraulic mutual assistance, thereby avoiding negative impact on the progress of tunnel construction due to the damage of one of the working pump groups.

[0031] In this embodiment, the number of booms is two, that is, the boom working pump group includes a first arm working pump group 130 and a second arm working pump group 150, and the boom action valve group includes a first arm action valve group 131 and a second arm action valve group 151. Of course, in other embodiments of the present invention, the number of booms can also be one, three, five, etc., and the specific number is not limited.

[0032] It should be noted that when the mutual assist reversing valve 114 is not working, one end thereof can maintain connection with the chassis working pump group 110, and the other end is disconnected from the input end of the first arm action valve group 131 and the input end of the second arm action valve group 151 at the same time; when the mutual assist reversing valve 114 is working, the other end thereof is selectively connected with the input end of the first arm action valve group 131 and the input end of the second arm action valve group 151, thereby realizing the auxiliary action valve group 113 and the first arm action valve group 131 and the second arm action valve group 151 The fluid circuit is connected, thereby achieving a hydraulic mutual assist effect.

[0033] Moreover, during the hydraulic mutual assistance operation, the flow of the oil circuit is bidirectional, that is, when the chassis working pump group 110 is damaged, the auxiliary action valve group 113 can receive oil for operation; when the first arm working pump group 130 or the second arm working pump group 150 is damaged, the first arm working valve group and the second arm working valve group can receive oil for operation.

[0034] It is worth noting that the steering brake valve 112 can be a valve used to realize steering action and braking action. Because its action priority is higher, its oil supply priority is also higher than that of the auxiliary action valve group 113. In addition, the valve group mentioned in the embodiment of the present invention can be a combination of multiple valves, or a general term for a single valve and other components, and the specific composition is not limited.

[0035] Please refer to Figure 1 The auxiliary action valve group 113 includes a first auxiliary valve group 1131 and a second auxiliary valve group 1132 arranged in parallel. The output end of the first auxiliary valve group 1131 is connected to the first rear leg lifting unit 133 and the second rear leg lifting unit 153 at the same time, and the output end of the second auxiliary valve group 1132 is connected to the sliding action unit 1135.

[0036] In the working state, when the first arm action valve group 131 or the second arm action valve group 151 drives the corresponding execution unit to move, the first rear leg lifting unit 133 and the second rear leg lifting unit 153 will also perform corresponding actions; in addition, before the first arm and the second arm reach the working position, the sliding action unit 1135 will usually move to drive the two to the appropriate working position.

[0037] Please refer to Figure 1The hydraulic mutual assistance system 100 includes a pressure building valve 115 and an oil cylinder 116. The pressure building valve 115 is arranged in a pipeline between the priority valve 111 and the first auxiliary valve group 1131. The pressure building valve 115 is used to communicate with the oil cylinder 116 in a non-working state, and the pressure reducing valve is used to regulate the oil flow entering the first auxiliary valve group 1131 in a working state.

[0038] It should be noted that when the pressure building valve 115 is not working, it is only used to provide return oil to the cylinder 116 for the pipeline between the priority valve 111 and the first auxiliary valve group 1131, so as to avoid excessive oil pressure entering the first auxiliary valve group 1131 and increasing the subsequent pipeline load; when hydraulic mutual assistance operations are performed, the pressure building valve 115 starts to work to reduce pressure, thereby appropriately reducing the oil flow entering the first auxiliary valve group 1131, and facilitating the oil flow to flow toward other valve groups.

[0039] Please refer to Figure 1 The hydraulic mutual assistance system 100 further includes a variable pressure on-off valve 117, a first relief valve 118 and a second relief valve 119. The variable pressure on-off valve 117 and the first relief valve 118 are sequentially arranged in the pipeline between the priority valve 111 and the first auxiliary valve group 1131, and the second relief valve 119 is arranged in the pipeline between the priority valve 111 and the second auxiliary valve group 1132; The first rear leg lifting unit 133 and the second rear leg lifting unit 153 are used to drive the variable pressure on-off valve 117 to be turned on in the low-pressure working state, and drive the first overflow valve 118 to work; or, the sliding action unit 1135 is used to drive the variable pressure on-off valve 117 to be turned off in the high-pressure working state, and drive the second overflow valve 119 to be paused.

[0040] The hydraulic mutual assistance system 100 can also perform high- and low-pressure mutual assistance operations. When the first rear leg lifting unit 133 or the second rear leg lifting unit 133 or the second rear leg lifting unit 133 requires low-pressure operation, the working pressure can be limited to a low pressure through the first overflow valve 118; when the sliding action unit 1135 requires high-pressure operation, the overflow oil of the first overflow valve 118 can be cut off by disconnecting the variable pressure conduction valve, and more oil can be introduced into the second auxiliary valve group 1132.

[0041] Please refer to Figure 1 The hydraulic mutual assistance system 100 further includes a first variable pump 134, a first rock drilling control valve 135 and a third relief valve 136. The first variable pump 134 is connected to the first rock drilling control valve 135 and the first arm action valve group 131 through a first load feedback oil circuit 137. The third relief valve 136 is arranged in the first load feedback oil circuit 137. At the same time, the hydraulic mutual assistance system 100 can also include a second variable pump 154, a second rock drilling control valve 155 and a fourth overflow valve 156. The second variable pump 154 ​​is connected to the second rock drilling control valve 155 and the second arm action valve group 151 through the second load feedback oil circuit 157, and the fourth overflow valve 156 is arranged in the second load feedback oil circuit 157.

[0042] During the operation, the first variable pump 134 and the first load feedback oil circuit 137, the second variable pump 154 ​​and the second load feedback oil circuit 157 are provided to realize sensitive feedback regulation of the oil. When the first rock drilling control valve 135 and the first arm action valve group 131, the second arm action valve group 151 and the second rock drilling control valve 155 have excessive oil pressure, the first variable pump 134 or the second variable pump 154 ​​can be driven to perform output regulation to reduce the oil pressure of the subsequent pump group or valve group. In addition, during the feedback process, the third relief valve 136 and the fourth relief valve 156 can respectively relieve the first load feedback oil circuit 137 and the second load feedback oil circuit 157 to further improve the timeliness of the regulation.

[0043] In this embodiment, the third relief valve 136 and the fourth relief valve 156 are preferably proportional relief valves.

[0044] Please refer to Figure 1 , the hydraulic mutual assistance system 100 further includes a first rock drilling unit 132 and a first on-off valve 138 , the first variable pump 134 is connected between the first arm working pump group 130 and the first rock drilling unit 132 , and the first on-off valve 138 is disposed in the first load feedback oil circuit 137 ; At the same time, the hydraulic mutual assistance system 100 also includes a second rock drilling unit 152 and a second on-off valve 158 . The second variable pump 154 ​​is connected between the second arm working pump group 150 and the second rock drilling unit 152 . The second on-off valve 158 is arranged in the second load feedback oil circuit 157 .

[0045] It should be noted that the first variable pump 134 can simultaneously adjust the pressure of the first rock drilling unit 132 by opening the first on-off valve 138; similarly, the second variable pump 154 ​​can simultaneously adjust the pressure of the second rock drilling unit 152 by opening the second on-off valve 158.

[0046] Please refer to Figure 1 In order to further improve the convenience of hydraulic mutual assistance, the first boom and the second boom can also perform hydraulic mutual assistance, that is, a first mutual assistance branch 170 is connected between the first variable pump 134 and the second variable pump 154, and a first mutual assistance on-off valve 171 is provided on the first mutual assistance branch 170; Similarly, a second mutual assistance branch 180 may be connected between the first rock drilling control valve 135 and the second rock drilling control valve 155 , and a second mutual assistance on-off valve 181 may be provided on the second mutual assistance branch 180 .

[0047] When the first mutual assistance on-off valve 171 is opened, hydraulic mutual assistance can be achieved between the first variable pump 134 and the second variable pump 154 ​​; when the second mutual assistance on-off valve 181 is opened, hydraulic mutual assistance can be achieved between the first rock drilling control valve 135 and the second rock drilling control valve 155 .

[0048] Please refer to Figure 1 The hydraulic mutual assistance system 100 further includes a first arm driving unit 139, a first rock drilling driving motor 140 and a first reversing valve 141. The first arm working pump group 130, the first arm driving unit 139, the first reversing valve 141 and the first rock drilling driving motor 140 are sequentially connected, and the first reversing valve 141 can be selectively connected to the forward end and the reverse end of the first rock drilling driving motor 140; The hydraulic mutual aid system 100 also includes a second arm drive unit 159, a second rock drilling drive motor 160 and a second reversing valve 161. The second arm working pump group 150, the second arm drive unit 159, the second reversing valve 161 and the second rock drilling drive motor 160 are connected in sequence, and the second reversing valve 161 can be selectively connected to the forward rotation end and the reverse rotation end of the second rock drilling drive motor 160.

[0049] During operation, in order to further achieve precise control of the first rock drilling unit 132, a first reversing valve 141 can be set to perform a reversing operation to drive the first rock drilling drive motor 140 to rotate forward or reverse; similarly, a second reversing valve 161 can be set to perform a reversing operation to drive the second rock drilling drive motor 160 to rotate forward or reverse.

[0050] It is worth noting that in order to avoid excessive pipeline oil pressure, a fifth overflow valve 142 can be connected to the pipeline between the first arm drive unit 139 and the first reversing valve 141, and a sixth overflow valve 162 can be connected to the pipeline between the second arm drive unit 159 and the second reversing valve 161.

[0051] Embodiment 2 The embodiment of the present invention further provides a hydraulic mutual assistance method, which is implemented by the hydraulic mutual assistance system 100. The hydraulic mutual assistance method includes: Under normal working conditions, the chassis working pump group 110 and the arm working pump group (specifically, the first arm working pump group 130 and the second arm working pump group 150 ) operate independently; Under abnormal working conditions, the chassis working pump group 110 supplies oil to the arm working valve group (specifically, it can be the first arm action valve group 131 or the second arm action valve group 151) through the mutual assisting reversing valve 114, or the arm working pump group (specifically, it can be the first arm working pump group 130 or the second arm working pump group 150) supplies oil to the auxiliary action valve group 113 through the mutual assisting reversing valve 114.

[0052] Embodiment 3 The embodiment of the present invention further provides an engineering trolley, including a hydraulic mutual assistance system 100, and the engineering trolley can be used to implement a hydraulic mutual assistance method.

[0053] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A hydraulic mutual assistance system, characterized in that: include: A chassis working pump group (110), a priority valve (111), a steering brake valve (112), an auxiliary action valve group (113), a mutual assistance reversing valve (114), a boom working pump group, and a boom action valve group; The output end of the boom working pump group is connected to the input end of the boom action valve group, the output end of the chassis working pump group (110) is connected to the input end of the priority valve (111), the priority output end of the priority valve (111) is connected to the steering brake valve (112), the non-priority output end of the priority valve (111) is simultaneously connected to the auxiliary action valve group (113) and one end of the mutual assistance reversing valve (114), and the other end of the mutual assistance reversing valve (114) is used to communicate with the input end of the boom action valve group in a mutual assistance operation state.

2. The hydraulic mutual assistance system according to claim 1, characterized in that: The boom working pump group comprises a first arm working pump group (130) and a second arm working pump group (150); the boom actuation valve group comprises a first arm actuation valve group (131) and a second arm actuation valve group (151); The output end of the first arm working pump group (130) is connected to the input end of the first arm actuating valve group (131), the output end of the second arm working pump group (150) is connected to the input end of the second arm actuating valve group (151), and the mutual assistance reversing valve (114) is used to selectively connect to the input end of the first arm actuating valve group (131) and the input end of the second arm actuating valve group (151) in a mutual assistance operation state.

3. The hydraulic mutual assistance system according to claim 2, characterized in that: The auxiliary action valve group (113) comprises a first auxiliary valve group (1131) and a second auxiliary valve group (1132) arranged in parallel, the output end of the first auxiliary valve group (1131) being connected to both the first rear leg lifting unit (133) and the second rear leg lifting unit (153), and the output end of the second auxiliary valve group (1132) being connected to the sliding action unit (1135).

4. The hydraulic mutual assistance system according to claim 3, characterized in that: The hydraulic mutual assistance system comprises a pressure building valve (115) and an oil cylinder (116); the pressure building valve (115) is arranged in a pipeline between the priority valve (111) and the first auxiliary valve group (1131); the pressure building valve (115) is used to communicate with the oil cylinder (116) in a non-working state; and the pressure building valve (115) is used to regulate the oil flow entering the first auxiliary valve group (1131) in a working state.

5. The hydraulic mutual assistance system according to claim 3, characterized in that: The hydraulic mutual assistance system further comprises a variable pressure on-off valve (117), a first relief valve (118) and a second relief valve (119); the variable pressure on-off valve (117) and the first relief valve (118) are arranged in sequence in the pipeline between the priority valve (111) and the first auxiliary valve group (1131); and the second relief valve (119) is arranged in the pipeline between the priority valve (111) and the second auxiliary valve group (1132); The first rear leg lifting unit (133) and the second rear leg lifting unit (153) are used to drive the variable pressure on-off valve (117) to be turned on in a low-pressure working state, and drive the first overflow valve (118) to work; or, the sliding action unit (1135) is used to drive the variable pressure on-off valve (117) to be turned off in a high-pressure working state, and drive the second overflow valve (119) to be paused.

6. The hydraulic mutual assistance system according to claim 3, characterized in that: The hydraulic mutual assistance system further comprises a first variable displacement pump (134), a first rock drilling control valve (135) and a third relief valve (136); the first variable displacement pump (134) is connected to the first rock drilling control valve (135) and the first arm action valve group (131) via a first load feedback oil circuit (137); the third relief valve (136) is arranged in the first load feedback oil circuit (137); And / or, the hydraulic mutual assistance system further comprises a second variable pump (154), a second rock drilling control valve (155) and a fourth overflow valve (156), wherein the second variable pump (154) is connected to the second rock drilling control valve (155) and the second arm action valve group (151) via a second load feedback oil circuit (157), and the fourth overflow valve (156) is arranged in the second load feedback oil circuit (157).

7. The hydraulic mutual assistance system according to claim 6, characterized in that: The hydraulic mutual assistance system further comprises a first rock drilling unit (132) and a first on-off valve (138); the first variable pump (134) is connected between the first arm working pump group (130) and the first rock drilling unit (132); and the first on-off valve (138) is arranged in the first load feedback oil circuit (137); And / or, the hydraulic mutual assistance system further comprises a second rock drilling unit (152) and a second on-off valve (158), the second variable pump (154) is connected between the second arm working pump group (150) and the second rock drilling unit (152), and the second on-off valve (158) is arranged in the second load feedback oil circuit (157); and / or, a first mutual assistance branch (170) is connected between the first variable pump (134) and the second variable pump (154), and a first mutual assistance on-off valve (171) is provided on the first mutual assistance branch (170); And / or, a second mutual assistance branch (180) is connected between the first rock drilling control valve (135) and the second rock drilling control valve (155), and a second mutual assistance on-off valve (181) is provided on the second mutual assistance branch (180).

8. The hydraulic mutual assistance system according to any one of claims 2 to 7, characterized in that: The hydraulic mutual assistance system further comprises a first arm driving unit (139), a first rock drilling driving motor (140) and a first reversing valve (141); the first arm working pump group (130), the first arm driving unit (139), the first reversing valve (141) and the first rock drilling driving motor (140) are connected in sequence; the first reversing valve (141) can be selectively connected to the forward rotation end and the reverse rotation end of the first rock drilling driving motor (140); And / or, the hydraulic mutual assistance system further comprises a second arm driving unit (159), a second rock drilling driving motor (160) and a second reversing valve (161); the second arm working pump group (150), the second arm driving unit (159), the second reversing valve (161) and the second rock drilling driving motor (160) are connected in sequence; and the second reversing valve (161) can be selectively connected to the forward rotation end and the reverse rotation end of the second rock drilling driving motor (160).

9. A hydraulic mutual assistance method, characterized in that: The hydraulic mutual assistance system according to any one of claims 1 to 8 is implemented, and the hydraulic mutual assistance method comprises: In a normal working state, the chassis working pump group (110) and the arm working pump group operate independently; In an abnormal working state, the chassis working pump group (110) supplies oil to the boom action valve group through the mutual assistance reversing valve (114), or the boom working pump group supplies oil to the auxiliary action valve group (113) through the mutual assistance reversing valve (114).

10. An engineering trolley, characterized in that: It comprises the hydraulic mutual assistance system as described in any one of claims 1 to 8, and / or is used to implement the hydraulic mutual assistance method as described in claim 9.

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