Pump truck hydraulic control system and vehicle

Abstract

The present invention provides a pump truck hydraulic control system and a vehicle. When the coil failure of the control valve causes the reversing function to fail, the pump truck hydraulic control system provided by the present invention can further control the switching of the reversing valve oil circuit through an emergency valve group to complete emergency measures and avoid passive shutdown. Furthermore, the emergency valve group can also be used to eliminate the fault type of the control system, that is, to eliminate the coil failure or the valve plate of the reversing valve being stuck. Specifically, since the present application can control the switching of the reversing valve oil circuit through the emergency valve group and the control valve at the same time, when the reversing function fails, the switching of the reversing valve oil circuit can be adjusted through the emergency valve group. If the reversing is successful, it means that the reversing function fails due to the coil failure. If the reversing is unsuccessful, it means that the reversing function fails due to the valve plate of the reversing valve being stuck.

Description

Technical Field

[0001] The present application belongs to the field of engineering machinery, and specifically, relates to a pump truck hydraulic control system and a vehicle. Background Art

[0002] For the hydraulic control system of a pump truck, its reversing function is usually completed by the cooperation of a reversing valve and a control valve. That is, during the working process, the control valve is first adjusted to change the position of the valve core of the reversing valve, and then the reversing function is completed. However, during the working process, the valve core is usually stuck or the control valve coil fails, resulting in the failure of the reversing function. This results in emergency braking of the pump truck due to the lack of emergency measures, and on the other hand, the cause of the failure cannot be analyzed.

[0003] Therefore, in order to solve the problem of control valve coil failure, inventing a hydraulic control system that can still complete switching through emergency operation when the solenoid valve coil fails and the switching function fails has become an urgent problem to be solved. Summary of the invention

[0004] The present invention aims to solve or improve at least one of the above-mentioned technical problems.

[0005] A first aspect of the present invention is to provide a hydraulic control system for a pump truck.

[0006] A second aspect of the present invention is to provide a vehicle.

[0007] The technical solution of the first aspect of the present invention provides a hydraulic control system for a pump truck, comprising: at least one emergency valve group and at least one working valve group, the working valve group and the emergency valve group are arranged one by one, and each working valve group comprises: an oil inlet channel; a reversing valve connected to the oil inlet channel, a first channel and a second channel are arranged in the reversing valve; a control valve connected to the oil inlet channel, and used to control the first channel to be connected to the oil inlet channel or the second channel to be connected to the oil inlet channel to achieve reversal. The emergency valve group is connected to the reversing valve in the corresponding working valve group, and can act on the corresponding reversing valve to control the reversing of the reversing valve.

[0008] The hydraulic control system of a pump truck provided by the present invention comprises at least one emergency valve group and at least one working valve group, the working valve group and the emergency valve group are arranged in one-to-one correspondence, each working valve group comprises an oil inlet channel, a reversing valve, a control valve and an oil return channel; the reversing valve is connected to the oil inlet channel, a first channel and a second channel which can be selectively connected are arranged in the reversing valve, the first channel and the second channel are respectively used to connect different hydraulic actuators, the control valve is connected to the oil inlet channel, and is used to control the reversing valve to switch so that the first channel is connected to the oil inlet channel or the second channel is connected to the oil inlet channel; further, the control valve comprises a first interface connected to the inlet of the first channel and a second interface connected to the inlet of the second channel. The second interface, when the first interface is connected to the oil inlet channel, the first channel is connected under the action of the oil pressure at the first interface, and when the second interface is connected to the oil inlet channel, the second channel is connected under the action of the oil pressure at the second interface, so that two different hydraulic actuators can work alternately through the control of the reversing valve; the emergency valve group is connected to the reversing valve in the corresponding working valve group, and the emergency valve group can act on the reversing valve and connect the first channel with the oil inlet channel or connect the second channel with the oil inlet channel, so that when the coil of the control valve fails and the reversing function fails, the emergency valve group can be further used to control the switching of the reversing valve oil circuit to complete the emergency measures and avoid passive shutdown. Furthermore, the emergency valve group can also be used to eliminate the fault type of the control system, that is, to eliminate the failure of the coil or the stuck valve plate of the reversing valve. Specifically, since the present application can control the switching of the reversing valve oil circuit through the emergency valve group and the control valve at the same time, when the reversing function fails, the emergency valve group can be used to adjust the switching of the reversing valve oil circuit. If the reversing is successful, it means that the failure of the reversing function is caused by the failure of the coil. If the reversing is unsuccessful, it means that the failure of the reversing function may be caused by the stuck valve plate of the reversing valve.

[0009] In the above technical solution, the pump truck hydraulic control system also includes: a control device, which is connected to at least one emergency valve group and at least one control valve, and can control the emergency valve group to act on the corresponding reversing valve to control the operation of the corresponding reversing valve when any control valve fails.

[0010] In this technical solution, the pump truck hydraulic control system also includes a control device, which is connected to at least one emergency valve group and at least one control valve. Furthermore, a corresponding emergency valve group is arranged between each emergency valve group and the corresponding control valve, so that when any control valve fails, the control device can control the corresponding emergency valve group to act on the corresponding reversing valve to control the reversing of the reversing valve and complete the emergency operation.

[0011] In the above technical solution, the hydraulic control system of the pump truck also includes an accumulator for providing hydraulic oil. The emergency valve group includes: an emergency reversing valve connected to the accumulator and the corresponding reversing valve. The emergency reversing valve is provided with a first emergency channel and a second emergency channel that can be selectively connected. When oil flows through the first emergency channel, the first channel of the reversing valve corresponding to the emergency reversing valve can be connected to the oil inlet channel. When oil flows through the second emergency channel, the second channel of the reversing valve corresponding to the emergency reversing valve can be connected to the oil inlet channel.

[0012] In this technical solution, the hydraulic control system of the pump truck also includes an accumulator, which is used to provide hydraulic oil in an emergency; the emergency valve group includes an emergency reversing valve, which is respectively connected to the accumulator and the corresponding reversing valve, and the emergency reversing valve is provided with a first emergency channel and a second emergency channel that can be selectively connected. When oil flows through the first emergency channel, the first channel can be connected to the oil inlet channel, and when oil flows through the second emergency channel, the second channel can be connected to the oil inlet channel. In this way, when the reversing function of the control valve fails, the staff can selectively switch the position of the corresponding emergency reversing valve core to connect the first emergency channel to the accumulator or the second emergency channel to the accumulator, thereby completing the reversing of the reversing valve. More specifically, the emergency reversing valve can connect the first emergency channel to the accumulator or the second emergency channel to the accumulator by switching the valve core. When the first emergency channel is connected to the accumulator, the hydraulic oil can act on the valve core of the reversing valve to the first position, at which time the first channel can be connected to the oil inlet channel, and the first working element starts to work. When the second emergency channel is connected to the accumulator, the hydraulic oil can act on the valve core of the reversing valve to the second position, at which time the second channel can be connected to the oil inlet channel, and the second working element starts to work.

[0013] In the above technical solution, the emergency valve group is provided with an oil inlet for oil intake and an oil return port for oil return.

[0014] In this technical solution, the emergency valve group is provided with an oil inlet for oil intake and an oil return port for oil return; the oil inlet is connected to the accumulator, hydraulic oil is provided to the emergency valve group through the accumulator, and the oil return port is connected to the oil tank.

[0015] In the above technical solution, the emergency reversing valve is a manual reversing valve or an automatic reversing valve.

[0016] In this technical solution, the emergency reversing valve is a manual reversing valve or an automatic reversing valve.

[0017] In the above technical solution, each working valve group includes: a first emergency interface for connecting the emergency valve group; a ball valve, one end of the ball valve is connected to the first emergency interface, and the other end of the ball valve is connected to the oil return port.

[0018] In this technical solution, each working valve group includes: a first emergency interface for connecting the emergency valve group; in this way, when the reversing function of any working valve group fails, the hydraulic oil in the emergency valve group can flow into the failed working valve group from the first emergency interface, and act on the corresponding reversing valve to complete the emergency reversing. Further, there are two first emergency interfaces, and after the two first emergency interfaces are oiled, they can act on both sides of the reversing valve core respectively, so that the reversing valve core is in different positions, realizing the emergency reversing function of the working valve group. Each working valve group also includes a ball valve, one end of the ball valve is connected to the first emergency interface, and the other end of the ball valve is connected to the return oil port. Under normal conditions, the ball valve is in a normally open state, so that even if the staff opens the emergency operation valve by mistake, then because the ball valve is in a normally open state, the hydraulic oil flowing through the first emergency interface will flow back to the oil tank through the ball valve. At this time, the hydraulic oil flowing through the first emergency interface will not change the action of the reversing valve core, ensuring the normal operation of the system and avoiding the staff from opening the emergency operation valve by mistake, resulting in a sudden reversal of the system and causing an accident. Furthermore, when the ball valve is closed in an emergency situation, the hydraulic oil flowing through the first emergency interface will only flow through the reversing valve, thereby changing the action of the reversing valve core to complete the reversing. Furthermore, the ball valve is an integrated ball valve.

[0019] In the above technical solution, the working valve group includes a main valve group and / or a swing valve group, and the emergency valve group includes a first emergency valve group corresponding to the main valve group and / or a second emergency valve group corresponding to the swing valve group.

[0020] In this technical solution, the working valve group includes a main valve group and / or a swing valve group, and the emergency valve group includes a first emergency valve group corresponding to the main valve group and / or a second emergency valve group corresponding to the swing valve group, so that the emergency operation of the main valve group can be achieved through the first emergency valve group, and the emergency operation of the swing valve group can be achieved through the second emergency valve group. Of course, the working valve group can also include other valve groups, and each valve group is correspondingly provided with a corresponding emergency valve group, so that emergency reversing of valve groups such as the main valve group and / or the swing valve group can be achieved respectively.

[0021] In the above technical solution, the working valve group includes a main valve group and a swing valve group, the first emergency valve group and the second emergency valve group are integrated into an emergency valve group module, or the first emergency valve group and the second emergency valve group are independently arranged.

[0022] In this technical solution, the working valve group includes a main valve group and a swing valve group. The main valve group and the swing valve group can be arranged on the same valve body or on different valve bodies. The first emergency valve group and the second emergency valve group are integrated into an emergency valve group module, that is, the first emergency valve group and the second emergency valve group are on one emergency valve body and are respectively connected to the oil inlet of the emergency valve group. In this way, multiple emergency valve groups are integrated into one, saving space. Of course, the first emergency valve group and the second emergency valve group can also be arranged independently of each other as needed, so that any emergency valve group can be easily disassembled and replaced.

[0023] In the above technical solution, the swing valve group also includes: a second emergency interface, used to connect to the second emergency valve group; a first one-way valve, connected to the second emergency interface, used to make the second emergency interface unidirectional, so that the second emergency interface can take in oil but cannot return oil; a pressure relief valve, connected to the second emergency interface to control the pressure at the second emergency interface; the main valve group also includes: a shuttle valve, arranged between the oil inlet channel of the main valve group and the control valve, and the shuttle valve is also connected to the external oil port.

[0024] In this technical solution, the swing valve group also includes a second emergency interface for connecting to the second emergency valve group; in this way, when the reversing function of the swing valve group fails, the emergency valve group can connect to the hydraulic oil and act on the swing valve group through the second emergency interface to complete the emergency reversing of the swing valve group. Furthermore, there are two second emergency interfaces, and the two second emergency interfaces can act on both sides of the reversing valve core of the swing valve group, so that the reversing valve core of the swing valve group is in different positions, realizing the emergency reversing function of the swing valve group.

[0025] The swing valve group also includes a first one-way valve, which is connected to the second emergency interface and is used to make the second emergency interface unidirectional so that the second emergency interface can take in oil but cannot return oil; in this way, the hydraulic oil can only flow from the emergency valve group into the swing valve group, avoiding the backflow of hydraulic oil and ensuring the normal reversing of the system.

[0026] Of course, the accumulator is connected to the oil inlet channel, and a first one-way valve can also be provided between the accumulator and the oil inlet channel. The first one-way valve can allow the hydraulic oil to flow from the oil inlet channel to the accumulator, so that the hydraulic oil in the oil inlet channel can always flow into the accumulator and store energy in the accumulator without the need to frequently replace the accumulator. At the same time, due to the presence of the one-way valve, the oil pressure of the hydraulic oil in the accumulator can be prevented from being too high and flowing back to the oil inlet channel, thereby ensuring the normal operation of the system.

[0027] In the above technical solution, the swing valve group also includes a pressure relief valve connected to the second emergency interface to control the pressure at the second emergency interface.

[0028] In this technical solution, the swing valve group also includes: a pressure relief valve, which is connected to the second emergency interface. When the oil pressure of the hydraulic oil provided by the accumulator is too high, the pressure can be relieved through the pressure relief valve to control the pressure at the second emergency interface and ensure the safety of the hydraulic system.

[0029] In the above technical solution, the main valve group further includes: a shuttle valve, which is arranged between the oil inlet channel of the main valve group and the control valve, and the shuttle valve is also connected to the external oil port.

[0030] In this technical solution, the main valve group also includes a shuttle valve, which is arranged between the oil inlet channel of the main valve group and the control valve. The shuttle valve is also connected to the external oil port, and the external oil port is connected to the external hydraulic oil. In this way, the oil pressure of the hydraulic oil flowing into the control valve can be guaranteed to avoid the inability to switch due to too low oil pressure, and to avoid damage to components due to excessive oil pressure.

[0031] In the above technical solution, the working valve group is integrated on a valve body.

[0032] In this technical solution, the working valve group is integrated on a valve body, that is, the main valve group, the swing valve group and other working valve groups are integrated on a valve body, which facilitates the arrangement of the valve groups and saves space.

[0033] In the above technical solution, the emergency valve group is integrated on a valve body.

[0034] In this technical solution, the emergency valve group is integrated on one valve body, that is, the emergency valve group corresponding to each valve group is integrated on one emergency valve body, which facilitates the arrangement of multiple emergency valve groups and saves space.

[0035] In the above technical solution, the pump truck hydraulic control system further includes: at least one switch valve, which is connected to the oil inlet of the emergency valve group and is used to control the on-off of the oil inlet of the emergency valve group.

[0036] In this technical solution, in the above technical solution, the hydraulic control system of the pump truck also includes: at least one switch valve, which is connected to the oil inlet of the emergency valve group and is used to control the on-off of the oil inlet of the emergency valve group. Furthermore, a switch valve is provided before the oil inlet of each emergency valve group, so that the on-off of the oil circuit of the emergency valve group is controlled by the switch valve to ensure the stable operation of the emergency system. Under normal working conditions, the switch valve is in a closed state. When the control valve coil burns out and causes the reversing failure, when the switch valve is opened, the emergency reversing valve can be adjusted to complete the emergency measures.

[0037] Furthermore, the emergency valve group also includes an emergency oil inlet, which is connected to the emergency reversing valve. In this way, when the oil pressure in the accumulator is insufficient, external hydraulic oil can be connected through the emergency oil inlet to ensure the smooth completion of emergency measures.

[0038] Furthermore, the main valve group and / or the swing valve group also include an overflow valve, which is respectively connected to the oil inlet channel and the oil return channel, so as to ensure the pressure in the oil circuit of the main valve group and / or the swing valve group and ensure the safety of the system.

[0039] Furthermore, the swing valve group also includes an on-off valve, which is connected to the oil inlet channel and the oil return channel respectively, so that the on-off of the oil circuit of the swing valve group can be controlled.

[0040] Furthermore, the swing valve group also includes an oil return valve, which is respectively connected to the oil inlet channel and the oil return channel, so that the pressure section of the swing valve group can be controlled by the oil return valve, that is, when the oil return valve is closed, the working elements on the swing valve group and the working elements on the main valve group work at the same time, and when the oil return valve is opened, the hydraulic oil on the oil inlet channel directly flows back to the oil return channel from the return oil, and the working elements on the swing valve group are in a non-working state. At this time, only the working elements on the main valve group are in a working state.

[0041] The technical solution of the second aspect of the present invention provides a vehicle, including: a pump truck hydraulic control system as described in any one of the first aspects of the present application.

[0042] The vehicle provided by the present application includes the pump truck hydraulic control system of any one of the first aspects of the present application. Since the vehicle provided by the present application includes the pump truck hydraulic control system of any one of the first aspects of the present application, the vehicle provided by the present application has all the beneficial effects of the pump truck hydraulic control system provided by any technical solution of the first aspect of the present application, which will not be repeated here.

[0043] Additional aspects and advantages of the present invention will become apparent in the following description or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the embodiments of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0045] Figure 1 It shows a structural schematic diagram of a main valve body of a pump truck hydraulic control system provided by an embodiment of the present invention;

[0046] Figure 2 A schematic structural diagram of a swing valve body of a pump truck hydraulic control system provided by an embodiment of the present invention is shown;

[0047] Figure 3 A schematic structural diagram of an emergency valve body of a pump truck hydraulic control system provided by an embodiment of the present invention is shown.

[0048] in, Figures 1 to 3 The corresponding relationship between the component names and numbers in is as follows:

[0049] 1 main valve body, 10 main valve group reversing valve, 11 main valve group oil inlet, 12 main valve group oil return port, 13 main valve group oil drain port, 14 main valve group relief valve, 15 main valve group integrated ball valve, 16 main valve group control valve, 17 shuttle valve, 18 main valve group working oil port;

[0050] 2 swing valve body, 200 swing valve group reversing valve, 201 swing valve group oil inlet, 202 swing valve group oil return port, 203 swing valve group oil drain port, 204 swing valve group overflow valve, 205 swing valve group integrated ball valve, 206 swing valve group control valve, 207 check valve, 208 swing valve group working oil port, 209 return oil valve, 210 accumulator, 211 pressure relief valve, 212 damping hole, 213 accumulator load discharge port;

[0051] 3 emergency valve body, 31 manual reversing valve, 32 emergency working valve oil inlet, 33 emergency working valve oil return port, 34 switch valve. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above aspects, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments according to the present invention. However, the embodiments according to the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the embodiments according to the present invention is not limited to the specific embodiments disclosed below.

[0054] Embodiment 1

[0055] The technical solution of the first aspect of the present invention provides a hydraulic control system for a pump truck, comprising: at least one emergency valve group and at least one working valve group, the working valve group and the emergency valve group are arranged one by one, and each working valve group comprises: an oil inlet channel; a reversing valve connected to the oil inlet channel, a first channel and a second channel are arranged in the reversing valve; a control valve connected to the oil inlet channel, used to control the reversing valve to switch, so that the first channel is connected to the oil inlet channel or the second channel is connected to the oil inlet channel. The emergency valve group is connected to the corresponding reversing valve and can act on the corresponding reversing valve to control the reversing of the reversing valve.

[0056] According to the pump truck hydraulic control system provided by the present embodiment, it includes at least one emergency valve group and at least one working valve group, the working valve group and the emergency valve group are arranged in a one-to-one correspondence, each working valve group includes an oil inlet channel, a reversing valve, a control valve and an oil return channel, the reversing valve is connected to the oil inlet channel, a first channel and a second channel that can be selectively connected are arranged in the reversing valve, the first channel and the second channel are respectively used to connect different hydraulic actuators, the control valve is connected to the oil inlet channel, and is used to control the reversing valve to switch so that the first channel is connected to the oil inlet channel or the second channel is connected to the oil inlet channel; further, the control valve includes a first interface connected to the inlet of the first channel and a first interface connected to the inlet of the second channel The second interface connected to the first interface is connected to the oil inlet channel, when the first interface is connected to the oil inlet channel, the first channel is connected under the action of the oil pressure at the first interface, and when the second interface is connected to the oil inlet channel, the second channel is connected under the action of the oil pressure at the second interface, so that two different hydraulic actuators can work alternately through the control of the reversing valve; the emergency valve group is connected to the corresponding reversing valve, the emergency valve group can act on the reversing valve, and connect the first channel with the oil inlet channel or connect the second channel with the oil inlet channel, so that when the coil of the control valve fails and the reversing function fails, the emergency valve group can be further used to control the switching of the reversing valve oil circuit to complete the emergency measures and avoid passive shutdown. Furthermore, the emergency valve group can also be used to eliminate the fault type of the control system, that is, to eliminate the failure of the coil or the stuck valve plate of the reversing valve. Specifically, since the present application can control the switching of the reversing valve oil circuit through the emergency valve group and the control valve at the same time, when the reversing function fails, the emergency valve group can be used to adjust the switching of the reversing valve oil circuit. If the reversing is successful, it means that the failure of the reversing function is caused by the failure of the coil. If the reversing is unsuccessful, it means that the failure of the reversing function may be caused by the stuck valve plate of the reversing valve.

[0057] In the above embodiment, the pump truck hydraulic control system also includes: a control device, which is connected to at least one emergency valve group and at least one control valve, and can control the emergency valve group to act on the corresponding reversing valve to control the operation of the corresponding reversing valve when any control valve fails.

[0058] In this embodiment, the pump truck hydraulic control system also includes a control device, which is connected to at least one emergency valve group and at least one control valve. Furthermore, a corresponding emergency valve group is arranged between each emergency valve group and the corresponding control valve, so that when any control valve fails, the control device can control the corresponding emergency valve group to act on the corresponding reversing valve to control the reversing of the reversing valve and complete the emergency operation.

[0059] In the above embodiment, the hydraulic control system of the pump truck also includes an accumulator for providing hydraulic oil. The emergency valve group includes: an emergency reversing valve connected to the accumulator and the corresponding reversing valve. The emergency reversing valve is provided with a first emergency channel and a second emergency channel that can be selectively connected. When oil flows through the first emergency channel, the first channel of the reversing valve corresponding to the emergency reversing valve can be connected to the oil inlet channel. When oil flows through the second emergency channel, the second channel of the reversing valve corresponding to the emergency reversing valve can be connected to the oil inlet channel.

[0060] In this embodiment, the hydraulic control system of the pump truck also includes an accumulator, which is used to provide hydraulic oil in an emergency; the emergency valve group includes an emergency reversing valve, which is respectively connected to the accumulator and the corresponding reversing valve, and the emergency reversing valve is provided with a first emergency channel and a second emergency channel that can be selectively connected. When oil flows through the first emergency channel, the first channel can be connected to the oil inlet channel, and when oil flows through the second emergency channel, the second channel can be connected to the oil inlet channel. In this way, when the reversing function of the control valve fails, the staff can selectively switch the position of the corresponding emergency reversing valve core to connect the first emergency channel to the accumulator or the second emergency channel to the accumulator, thereby completing the reversing of the reversing valve. More specifically, the emergency reversing valve can connect the first emergency channel to the accumulator or the second emergency channel to the accumulator by switching the valve core. When the first emergency channel is connected to the accumulator, the hydraulic oil can act on the valve core of the reversing valve to the first position, at which time the first channel can be connected to the oil inlet channel, and the first working element starts to work. When the second emergency channel is connected to the accumulator, the hydraulic oil can act on the valve core of the reversing valve to the second position, at which time the second channel can be connected to the oil inlet channel, and the second working element starts to work.

[0061] In the above embodiment, the emergency valve group is provided with an oil inlet for oil intake and an oil return port for oil return.

[0062] In this embodiment, the emergency valve group is provided with an oil inlet for oil intake and an oil return port for oil return; the oil inlet is connected to the accumulator, and hydraulic oil is provided to the emergency valve group through the accumulator, and the oil return port is connected to the oil tank.

[0063] In the above embodiments, the emergency reversing valve is a manual reversing valve or an automatic reversing valve.

[0064] In this embodiment, the emergency reversing valve is a manual reversing valve, and may also be an automatic reversing valve.

[0065] In the above embodiment, each working valve group includes: a first emergency interface for connecting the emergency valve group; an integrated ball valve, one end of the integrated ball valve is connected to the first emergency interface, and the other end of the integrated ball valve is connected to the oil return port.

[0066] In this embodiment, each working valve group includes: a first emergency interface for connecting the emergency valve group; in this way, when the reversing function of any working valve group fails, the hydraulic oil in the emergency valve group can flow into the failed working valve group from the first emergency interface and act on the corresponding reversing valve to complete the emergency reversing. Further, there are two first emergency interfaces, and after the two first emergency interfaces are oiled, they can act on both sides of the reversing valve core respectively, so that the reversing valve core is in different positions, realizing the emergency reversing function of the working valve group. Each working valve group also includes an integrated ball valve, one end of the integrated ball valve is connected to the first emergency interface, and the other end of the integrated ball valve is connected to the return oil port. Under normal conditions, the integrated ball valve is in a normally open state, so that even if the staff opens the emergency operation valve by mistake, then because the integrated ball valve is in a normally open state, the hydraulic oil flowing through the first emergency interface will flow back to the oil tank through the integrated ball valve. At this time, the hydraulic oil flowing through the first emergency interface will not change the action of the reversing valve core, ensuring the normal operation of the system and avoiding the staff from opening the emergency operation valve by mistake, resulting in a sudden reversal of the system and causing an accident. Furthermore, when in an emergency situation, the integrated ball valve is closed, and the hydraulic oil flowing through the first emergency interface will only flow through the reversing valve, thereby changing the action of the reversing valve core and completing the reversing.

[0067] In the above embodiments, the working valve group includes a main valve group and / or a swing valve group, and the emergency valve group includes a first emergency valve group corresponding to the main valve group and / or a second emergency valve group corresponding to the swing valve group.

[0068] In this embodiment, the working valve group includes a main valve group and / or a swing valve group, and the emergency valve group includes a first emergency valve group corresponding to the main valve group and / or a second emergency valve group corresponding to the swing valve group, so that the emergency operation of the main valve group can be achieved through the first emergency valve group, and the emergency operation of the swing valve group can be achieved through the second emergency valve group. Of course, the working valve group can also include other valve groups, and each valve group is correspondingly provided with a corresponding emergency valve group, so that emergency reversing of valve groups such as the main valve group and / or the swing valve group can be achieved respectively.

[0069] In the above embodiments, the working valve group includes a main valve group and a swing valve group, the first emergency valve group and the second emergency valve group are integrated into an emergency valve group module, or the first emergency valve group and the second emergency valve group are independently arranged.

[0070] In this embodiment, the working valve group includes a main valve group and a swing valve group. The main valve group and the swing valve group can be arranged on the same valve body or on different valve bodies. The first emergency valve group and the second emergency valve group are integrated into an emergency valve group module, that is, the first emergency valve group and the second emergency valve group are on one emergency valve body and are respectively connected to the oil inlet of the emergency valve group. In this way, multiple emergency valve groups are integrated into one, saving space. Of course, the first emergency valve group and the second emergency valve group can also be arranged independently of each other as needed, so that any emergency valve group can be easily disassembled and replaced.

[0071] In the above embodiment, the swing valve group also includes: a second emergency interface, used to connect to the second emergency valve group; a first one-way valve, connected to the second emergency interface, used to make the second emergency interface unidirectional, so that the second emergency interface can take in oil but cannot return oil; a pressure relief valve, connected to the second emergency interface to control the pressure at the second emergency interface; the main valve group also includes: a shuttle valve, arranged between the oil inlet channel of the main valve group and the control valve, and the shuttle valve is also connected to the external oil port.

[0072] In this embodiment, the swing valve group also includes a second emergency interface for connecting to the second emergency valve group; in this way, when the reversing function of the swing valve group fails, the emergency valve group can connect to the hydraulic oil and act on the swing valve group through the second emergency interface to complete the emergency reversing of the swing valve group. Further, there are two second emergency interfaces, and the two second emergency interfaces can act on both sides of the reversing valve core of the swing valve group, so that the reversing valve core of the swing valve group is in different positions, thereby realizing the emergency reversing function of the swing valve group.

[0073] The swing valve group also includes a first one-way valve, which is connected to the second emergency interface and is used to make the second emergency interface unidirectional so that the second emergency interface can take in oil but cannot return oil; in this way, the hydraulic oil can only flow from the emergency valve group into the swing valve group, avoiding the backflow of hydraulic oil and ensuring the normal reversing of the system.

[0074] Of course, the accumulator is connected to the oil inlet channel, and a first one-way valve can also be provided between the accumulator and the oil inlet channel. The first one-way valve can allow the hydraulic oil to flow from the oil inlet channel to the accumulator, so that the hydraulic oil in the oil inlet channel can always flow into the accumulator and store energy in the accumulator without the need to frequently replace the accumulator. At the same time, due to the presence of the one-way valve, the oil pressure of the hydraulic oil in the accumulator can be prevented from being too high and flowing back to the oil inlet channel, thereby ensuring the normal operation of the system.

[0075] In the above embodiment, the swing valve group further includes a pressure relief valve connected to the second emergency interface to control the pressure at the second emergency interface.

[0076] In this embodiment, the swing valve group also includes: a pressure relief valve, which is connected to the second emergency interface. When the oil pressure of the hydraulic oil provided by the accumulator is too high, the pressure can be relieved through the pressure relief valve to control the pressure at the second emergency interface and ensure the safety of the hydraulic system.

[0077] In the above embodiment, the main valve group further includes: a shuttle valve, which is arranged between the oil inlet channel of the main valve group and the control valve, and the shuttle valve is also connected to the external oil port.

[0078] In this embodiment, the main valve group also includes a shuttle valve, which is arranged between the oil inlet channel of the main valve group and the control valve. The shuttle valve is also connected to the external oil port, and the external oil port is connected to the external hydraulic oil. In this way, the oil pressure of the hydraulic oil flowing into the control valve can be guaranteed to avoid the inability to switch due to too low oil pressure, and the damage to the components due to excessive oil pressure can be avoided.

[0079] In the above embodiments, the working valve group is integrated on a valve body.

[0080] In this embodiment, the working valve group is integrated on a valve body, that is, the main valve group, the swing valve group and other working valve groups are integrated on a valve body, which facilitates the arrangement of the valve groups and saves space.

[0081] In the above embodiments, the emergency valve group is integrated on a valve body.

[0082] In this embodiment, the emergency valve group is integrated on one valve body, that is, the emergency valve group corresponding to each valve group is integrated on one emergency valve body, which facilitates the arrangement of multiple emergency valve groups and saves space.

[0083] In the above embodiment, the pump truck hydraulic control system further includes: at least one switch valve, which is connected to the oil inlet of the emergency valve group and is used to control the on-off of the oil inlet of the emergency valve group.

[0084] In this embodiment, in the above embodiment, the hydraulic control system of the pump truck further includes: at least one switch valve, which is connected to the oil inlet of the emergency valve group and is used to control the on-off of the oil inlet of the emergency valve group. Further, a switch valve is provided before the oil inlet of each emergency valve group, so that the on-off of the oil circuit of the emergency valve group is controlled by the switch valve to ensure the stable operation of the emergency system. Under normal working conditions, the switch valve is in a closed state. When the control valve coil burns out and causes the reversing failure, when the switch valve is opened, the emergency reversing valve can be adjusted to complete the emergency measures.

[0085] Furthermore, the emergency valve group also includes an emergency oil inlet, which is connected to the emergency reversing valve. In this way, when the oil pressure in the accumulator is insufficient, external hydraulic oil can be connected through the emergency oil inlet to ensure the smooth completion of emergency measures.

[0086] Furthermore, the main valve group and / or the swing valve group also include an overflow valve, which is respectively connected to the oil inlet channel and the oil return channel, so as to ensure the pressure in the oil circuit of the main valve group and / or the swing valve group and ensure the safety of the system.

[0087] Furthermore, the swing valve group also includes an on-off valve, which is connected to the oil inlet channel and the oil return channel respectively, so that the on-off of the oil circuit of the swing valve group can be controlled.

[0088] Furthermore, the swing valve group also includes an oil return valve, which is respectively connected to the oil inlet channel and the oil return channel, so that the pressure section of the swing valve group can be controlled by the oil return valve, that is, when the oil return valve is closed, the working elements on the swing valve group and the working elements on the main valve group work at the same time, and when the oil return valve is opened, the hydraulic oil on the oil inlet channel directly flows back to the oil return channel from the return oil, and the working elements on the swing valve group are in a non-working state. At this time, only the working elements on the main valve group are in a working state.

[0089] An embodiment of the second aspect of the present invention provides a vehicle, including: a pump truck hydraulic control system according to any technical solution of the embodiment of the first aspect of the present application.

[0090] The vehicle provided in this embodiment includes the pump truck hydraulic control system of the first embodiment of the present application. Since the vehicle provided in this application includes the pump truck hydraulic control system of the first embodiment of the present application, the vehicle provided in this application has all the beneficial effects of the pump truck hydraulic control system provided in the first embodiment of the present application.

[0091] Furthermore, in order to have a clearer understanding of the present invention, taking the working valve group including the main valve body 1 and the swing valve body 2 as an example, the hydraulic control system of the present invention is further described in detail.

[0092] like Figures 1 to 3 As shown, the hydraulic system of this scheme includes: Figure 1 The main valve group shown in Figure 2 The swing valve group shown and Figure 3The emergency valve group shown in the figure, the main valve group oil inlet 11 and the swing valve group oil inlet 201 are connected to the oil pump, the main valve group oil return port 12 and the swing valve group oil return port 202 are connected to the oil tank; the main valve group is arranged on the main valve body 1, and the swing valve group is arranged on the swing valve body 2. The main valve group control valve 16 is used to control the action of the valve core of the main valve group reversing valve 10 to control the two main valve group working oil ports 18 to select one to be connected to the main valve group oil inlet 11, the two working oil ports C1 and C2 of the main valve group are respectively connected to the left and right main oil cylinders of the pump truck, the swing valve group control valve 206 is used to control the action of the valve core of the swing valve group reversing valve 200 to control the two swing valve group working oil ports 208 to select one to be connected to the swing valve group oil inlet 201, and the two working oil ports S1 and S2 of the swing valve group are respectively used to connect the left and right swing valve oil cylinders of the pump truck; the emergency valve group is arranged on the emergency valve body 3, and the emergency working valve oil inlet 32 ​​is connected to the switch valve 34. The switch valve 34 is connected to the external oil port Gp of the swing valve group through a pipeline, and the external oil port Gp of the main valve group and the external oil port Gp of the swing valve group are connected through a pipeline, so that the accumulator 210 provides working oil for the emergency valve group and also provides control pressure oil for the main valve group and the swing valve group; the two manual valves 31 on the emergency valve group are respectively connected to the main valve body 1 and the swing valve body 2 through pipelines, and further, the working oil ports A1 and A2 of the emergency working valve are connected to the external oil ports A1 and A2 on the main valve group through pipelines; the working oil ports B1 and B2 of the emergency working valve are connected to the external oil ports B1 and B2 on the swing valve group through pipelines; in this way, when the main valve group control valve 16 or the swing valve group control valve 206 is damaged, the corresponding manual valve 31 can be adjusted to change the action of the valve core of the main valve group reversing valve 10 or the swing valve group reversing valve 200, complete the reversing of the main valve group reversing valve 10 or the swing valve group reversing valve 200, and realize emergency processing. The shuttle valve 17 of the main valve group is used to control the pressure of the hydraulic oil; the two ends of the main valve group overflow valve 14 are connected to the main valve group oil inlet 11 and the main valve group oil drain port 13 for overload protection of the main valve group system, and the two ends of the swing valve group overflow valve 204 are connected to the swing valve group oil inlet 201 and the swing valve group oil return port 202 for overload protection of the swing valve group system; the pressure relief valve 211 is used to relieve the pressure of the accumulator 210, so that the hydraulic oil flows through the pressure relief valve 211 and the damping hole 212 to the accumulator load relief port 213, and the two ends of the swing valve group oil return valve 209 are connected to the swing valve group oil inlet 201 and the swing valve group oil return port 202, which is used to control the pressure on and off of the swing valve system, so that when only the main valve group system needs to work, the swing valve group oil return valve 209 can be opened, and the hydraulic oil returns to the oil return port 202 through the swing valve group oil return valve 209; the emergency working valve oil return port 33 is connected to the oil tank.

[0093] The specific working status of the hydraulic system is as follows:

[0094] (1) Normal working mode

[0095] In the normal working mode, the switch valve 34 arranged at the front end of the emergency working valve oil inlet 32 ​​is in the closed state, and the two groups of manual reversing valves 31 of the emergency working valve group are in the middle state. At this time, the emergency operating system is cut off, and the main valve group integrated ball valve 15 and the swing valve group integrated ball valve 205 are in the open state to prevent workers from accidentally opening the switch valve 34 and suddenly reversing. In the normal working mode, the reversal of the main valve group and the swing valve group is achieved through their respective control valves.

[0096] (2) Emergency work mode

[0097] When the main valve group or the swing valve group loses its switching function due to damage to the control valve coil, power failure of the electrical control system, or failure of the electrical control system, open the switch valve 34, close the main valve group integrated ball valve 15 and the swing valve group integrated ball valve 205, and manually switch the two groups of manual valves 31 of the emergency working valve in sequence, so that the two groups of working oil of the emergency working valve can act on the two ends of the valve core of the main valve group reversing valve 10 and the swing valve group reversing valve 200 respectively, to ensure that the reversing function is restored and the pump truck pumping operation can continue.

[0098] (3) Maintenance mode

[0099] When replacing the swing valve cylinder or the pumping distribution component, the swing valve group integrated ball valve 205 can be closed. At the same time, by operating the manual reversing valve 31 in the emergency working system to control the opening of the swing valve group reversing valve 200, the swing valve cylinder can be accurately kept in the required position, eliminating the complicated operation of manually adjusting the swing position of the swing valve cylinder. The operation is convenient, reliable, safe, and time-saving and labor-saving.

[0100] (4) Troubleshooting mode

[0101] When a failure occurs in the main valve hydraulic system or the swing valve hydraulic system, the integrated ball valves in the main valve group and the swing valve group are closed, and the switch valve 34 at the front end of the emergency working valve is opened to put the emergency working system into working state. At the same time, the manual reversing valve 31 of the emergency working valve is operated separately to determine whether the failure is caused by valve core sticking or control valve coil failure. This not only reduces the workload of troubleshooting, but also realizes rapid fault location and improves troubleshooting efficiency.

[0102] In the embodiments according to the present invention, the terms "first", "second", and "third" are only used for description and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" 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; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments according to the present invention can be understood according to specific circumstances.

[0103] In addition, although each operation is described in a specific order, this should be understood as requiring such operation to be performed in the specific order shown or in a sequential order, or requiring that all illustrated operations should be performed to obtain desired results. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present invention. Some features described in the context of a separate embodiment can also be implemented in a single implementation in combination. On the contrary, the various features described in the context of a single implementation can also be implemented in multiple implementations individually or in any suitable sub-combination mode.

[0104] Although the subject matter has been described in the language of specific structural features and / or method logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0105] The above are only preferred embodiments according to the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various modifications and changes may be made according to the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention shall be included in the protection scope of the embodiments of the present invention.

Claims

1. A hydraulic control system for a pump truck, characterized in that: include: At least one emergency valve group and at least one working valve group, the working valve group and the emergency valve group are arranged in one-to-one correspondence, Each of the working valve groups comprises: Oil inlet channel; A reversing valve connected to the oil inlet passage, wherein a first passage and a second passage are provided in the reversing valve; a control valve, connected to the oil inlet passage, for controlling the first passage to be connected to the oil inlet passage or the second passage to be connected to the oil inlet passage to achieve switching; The emergency valve group is connected to the reversing valve in the corresponding working valve group and can act on the corresponding reversing valve to control the reversing of the reversing valve; Each of the working valve groups comprises: A first emergency interface, used to connect the emergency valve group; A ball valve, one end of which is connected to the first emergency interface, and the other end of which is connected to the oil return port.

2. The hydraulic control system of a pump truck according to claim 1, characterized in that: Also includes: The control device is connected to at least one of the emergency valve groups and at least one of the control valves, and can control the emergency valve group to act on the corresponding reversing valve to control the operation of the corresponding reversing valve when any of the control valves fails.

3. The hydraulic control system of a pump truck according to claim 1, characterized in that: It also includes an accumulator for providing hydraulic oil, and the emergency valve group includes: An emergency reversing valve is connected to the accumulator and the corresponding reversing valve. The emergency reversing valve is provided with a first emergency channel and a second emergency channel that can be selectively connected. When oil flows through the first emergency channel, the first channel of the reversing valve corresponding to the emergency reversing valve can be connected to the oil inlet channel. When oil flows through the second emergency channel, the second channel of the reversing valve corresponding to the emergency reversing valve can be connected to the oil inlet channel.

4. The pump truck hydraulic control system according to claim 3, characterized in that: The emergency valve group is provided with an oil inlet for oil inlet and an oil return port for oil return; and / or The emergency reversing valve is a manual reversing valve or an automatic reversing valve.

5. The pump truck hydraulic control system according to claim 1, characterized in that: The working valve group includes a main valve group and / or a swing valve group, and the emergency valve group includes a first emergency valve group corresponding to the main valve group and / or a second emergency valve group corresponding to the swing valve group.

6. The hydraulic control system for a pump truck according to claim 5, characterized in that: The working valve group includes a main valve group and a swing valve group, the first emergency valve group and the second emergency valve group are integrated into an emergency valve group module, or the first emergency valve group and the second emergency valve group are independently arranged.

7. The pump truck hydraulic control system according to claim 5, characterized in that: The swing valve group also includes: A second emergency interface, used to connect to the second emergency valve group; a first one-way valve, connected to the second emergency interface, and used to make the second emergency interface unidirectional, so that the second emergency interface can take in oil but cannot return oil; a pressure relief valve, connected to the second emergency interface, to control the pressure at the second emergency interface; The main valve group also includes: The shuttle valve is arranged between the oil inlet passage of the main valve group and the control valve, and the shuttle valve is also connected to the external oil port.

8. The hydraulic control system for a pump truck according to any one of claims 1 to 7, characterized in that: The working valve group is integrated on a valve body, and / or the emergency valve group is integrated on a valve body; and / or The pump truck hydraulic control system also includes: at least one switch valve, which is connected to the oil inlet of the emergency valve group and is used to control the on-off of the oil inlet of the emergency valve group.

9. A vehicle, characterized in that include: A pump truck hydraulic control system as claimed in any one of claims 1 to 8.

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