Hydraulic system and well cementing truck with same

Abstract

The utility model provides a hydraulic system and a well cementation truck with the same, which comprises a first hydraulic pump and a second hydraulic pump, the first hydraulic pump is an electric drive pump, the second hydraulic pump is an oil drive pump, and the first hydraulic pump and the second hydraulic pump can selectively drive on-board operation parts to operate; wherein the first hydraulic pump has a power-on state and a power-off state; when the first hydraulic pump is in a power-on state, the first hydraulic pump drives an on-board operation part to operate, and the second hydraulic pump is in a standby state; and when the first hydraulic pump is in a power-off state, the second hydraulic pump drives the working part on the table to work. By means of the technical scheme, the technical problem that when a power source of well cementation equipment in the prior art fails, cement paste is difficult to discharge, and the equipment is prone to being damaged can be solved.

Description

Technical Field

[0001] This utility model relates to the field of cementing equipment technology, and more specifically, to a hydraulic system and a cementing vehicle having the same. Background Technology

[0002] Currently, the main functions of cementing equipment are mixing and pumping cement slurry. During the operation of cementing equipment, the mixing system, manifold system and pumping system are all filled with cement slurry.

[0003] However, when the power source of the cementing equipment fails and it cannot work properly, the cement slurry in the equipment is difficult to discharge quickly, and may even solidify in the mixing system, manifold system and pumping system, making it difficult to clean later, and in severe cases, it may cause damage to the equipment. Utility Model Content

[0004] The main objective of this invention is to provide a hydraulic system and a cementing truck having the same, in order to solve the technical problem in the prior art that cement slurry is difficult to discharge when the power source of cementing equipment fails, which can easily lead to equipment damage.

[0005] To achieve the above objectives, according to one aspect of the present invention, a hydraulic system is provided, comprising:

[0006] The first hydraulic pump is an electric pump and the second hydraulic pump is an oil pump. The first hydraulic pump and the second hydraulic pump can selectively drive the working parts on the platform to perform operations.

[0007] The first hydraulic pump has an on-state and an off-state. When the first hydraulic pump is on-state, it drives the working parts on the platform to perform operations, while the second hydraulic pump is in standby state. When the first hydraulic pump is off-state, it drives the working parts on the platform to perform operations.

[0008] Furthermore, the hydraulic system also includes:

[0009] The first directional valve is installed on the pipeline connecting the first hydraulic pump and the second hydraulic pump. The oil pressure outlet of the first directional valve is connected to the drive oil circuit for driving the working parts on the platform. The first directional valve has a first reversing position and a second reversing position.

[0010] Specifically, when the first directional valve is in the first directional position, the oil pressure of the first hydraulic pump flows into the drive oil circuit through the first directional valve; when the first directional valve is in the second directional position, the oil pressure of the second hydraulic pump flows into the drive oil circuit through the first directional valve.

[0011] Furthermore, when the first directional valve is in the first directional position, the oil outlet of the second hydraulic pump is connected to the oil tank, so that the oil of the second hydraulic pump flows back to the oil tank through the oil outlet.

[0012] Furthermore, the first directional valve is an electrically controlled directional valve; or,

[0013] The first directional valve is a hydraulically controlled directional valve. The hydraulic system also includes a priority flow valve, which is located between the first hydraulic pump and the first directional valve. The priority port of the priority flow valve is connected to the first directional valve.

[0014] Furthermore, the hydraulic system also includes:

[0015] Control oil circuit and control valve, with the control valve located on the control oil circuit;

[0016] The platform overflow valve has its inlet connected to the flow path between the first hydraulic pump and the first directional valve, and its outlet connected to the oil tank.

[0017] The under-stage relief valve has its inlet connected to the flow path between the second hydraulic pump and the first directional valve, and its outlet connected to the oil tank.

[0018] The control oil circuit can be selectively connected to the on-board relief valve and the off-board relief valve to control the on-board relief valve or the off-board relief valve through the control valve.

[0019] Furthermore, the first directional valve is a hydraulically controlled directional valve, and the hydraulic system also includes a priority flow valve, which is located between the first hydraulic pump and the first directional valve, with its priority port connected to the drive port of the first directional valve; the hydraulic system also includes:

[0020] The second directional valve has a drive port connected to the priority port of the priority flow valve. The second directional valve has a third reversing position and a fourth reversing position. When the second directional valve is in the third reversing position, the control oil circuit is connected to the overflow valve on the platform. When the second directional valve is in the fourth reversing position, the control oil circuit is connected to the overflow valve under the platform.

[0021] Furthermore, the platform-mounted operating components include a circulating centrifugal pump, a jet centrifugal pump, and a manifold assembly, with both the circulating and jet centrifugal pumps connected to the manifold assembly. When the first hydraulic pump is de-energized, the second hydraulic pump drives the circulating and jet centrifugal pumps to clean the manifold; and / or,

[0022] The platform operating components also include a ash lowering valve; when the first hydraulic pump is de-energized, the second hydraulic pump drives the ash lowering valve to close; and / or,

[0023] The platform also includes a stirring motor; when the first hydraulic pump is de-energized, the second hydraulic pump drives the stirring motor.

[0024] Furthermore, the platform operating components include:

[0025] The mixing component is used to mix water and ash to be mixed into a slurry; and / or,

[0026] The ash feeding component is used to feed the ash to be mixed into the mixing component; and / or,

[0027] Plunger pumps are used for pumping mud; and / or,

[0028] Manifold components are used to transport mud or clean water.

[0029] Furthermore, the hydraulic system also includes detection components;

[0030] The detection component is connected to the first hydraulic pump and is used to detect the energization status of the first hydraulic pump; or,

[0031] The first directional valve is a hydraulically controlled directional valve. The hydraulic system also includes a priority flow valve, which is located between the first hydraulic pump and the first directional valve. The priority port of the priority flow valve is connected to the first directional valve. The detection element is used to detect the pressure at the priority port of the priority flow valve, so as to detect the energization status of the first hydraulic pump based on the pressure at the priority port.

[0032] According to another aspect of the present invention, a cementing truck is provided, comprising:

[0033] Vehicle;

[0034] The hydraulic system described above is mounted on the vehicle.

[0035] Furthermore, the cementing truck also includes a roller, which is mounted on the carrier and positioned above the carrier;

[0036] The roller is wound with electrical wires and cables, which are electrically connected to the first hydraulic pump of the hydraulic system; and / or,

[0037] The first hydraulic pump of the hydraulic system is connected to the drum drive.

[0038] By applying the technical solution of this utility model, the second hydraulic pump ensures that when the power supply to the first hydraulic pump fails or the first hydraulic pump itself malfunctions, the second hydraulic pump drives the platform working component for emergency operation. This prevents the platform working component from stopping work directly due to lack of a driving source, thus preventing cement slurry from solidifying in the platform working component and being difficult to discharge, thereby reducing the equipment failure rate and extending the service life of the platform working component. Therefore, the hydraulic system and cementing truck provided in this embodiment can solve the technical problem in the prior art where the cementing equipment is difficult to discharge when the power source fails, which easily leads to equipment damage. Attached Figure Description

[0039] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0040] Figure 1 A schematic diagram of the overall structure of the cementing truck provided according to Embodiment 2 of this utility model is shown;

[0041] Figure 2 A control principle diagram of a hydraulic system provided according to Embodiment 1 of the present invention is shown.

[0042] The above figures include the following reference numerals:

[0043] 1. First hydraulic pump; 2. Second hydraulic pump;

[0044] 3. Platform operating components; 31. Mixing components; 32. Ash feeding components; 33. Plunger pump; 34. Manifold components;

[0045] 4. First directional valve;

[0046] 5. Priority flow valve; 51. Priority port;

[0047] 6. Carrier; 7. Roller; 8. Control oil circuit; 9. Control valve; 10. Platform overflow valve; 11. Under-platform overflow valve; 12. Second directional valve; 13. Pressure detection element; 14. Oil tank; 15. Suction oil filter; 16. Return oil filter; 17. Thermostat; 18. Radiator; 19. Hydraulic motor. Detailed Implementation

[0048] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] like Figures 1 to 2 As shown, Embodiment 1 of this utility model provides a hydraulic system, which includes a first hydraulic pump 1 and a second hydraulic pump 2. The first hydraulic pump 1 is an electrically driven pump, and the second hydraulic pump 2 is an oil-driven pump. The first hydraulic pump 1 and the second hydraulic pump 2 can selectively drive the working component 3 on the platform to perform operations. The first hydraulic pump 1 has an energized state and an de-energized state. When the first hydraulic pump 1 is energized, it drives the working component 3 on the platform to perform operations, and the second hydraulic pump 2 is in a standby state. When the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 drives the working component 3 on the platform to perform operations.

[0050] The hydraulic system provided in Embodiment 1 of this utility model, through the configuration of the second hydraulic pump 2, ensures that when the power supply to the first hydraulic pump 1 fails or the first hydraulic pump 1 itself malfunctions, the second hydraulic pump 2 drives the platform working component 3 to perform emergency operations. This prevents the platform working component 3 from directly stopping work due to lack of a driving source, thereby preventing cement slurry from solidifying in the platform working component 3 and being difficult to discharge, thus reducing the equipment failure rate and extending the service life of the platform working component 3. Therefore, the hydraulic system provided in this embodiment can solve the technical problem in the prior art where the cement slurry is difficult to discharge when the power source of the cementing equipment fails, which can easily lead to equipment damage.

[0051] It should be noted that the first hydraulic pump 1 can be a platform hydraulic pump located above the vehicle, while the second hydraulic pump 2 can be a chassis hydraulic pump located below the vehicle. Specifically, the second hydraulic pump 2 is mounted on the chassis and is primarily used for chassis drive operations.

[0052] Specifically, when the second hydraulic pump 2 is in standby mode, the oil flowing out of the second hydraulic pump 2 will flow back into the oil tank 14. In this way, the equipment response time can be reduced, and when the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 can quickly enter the working state and drive the working parts 3 on the platform to perform operations.

[0053] Specifically, the hydraulic system also includes a first directional valve 4, which is installed on the pipeline connecting the first hydraulic pump 1 and the second hydraulic pump 2. The oil pressure outlet of the first directional valve 4 is connected to the drive oil circuit for driving the working component 3 on the platform. The first directional valve 4 has a first reversing position and a second reversing position. When the first directional valve 4 is in the first reversing position, the oil pressure of the first hydraulic pump 1 flows into the drive oil circuit through the first directional valve 4. When the first directional valve 4 is in the second reversing position, the oil pressure of the second hydraulic pump 2 flows into the drive oil circuit through the first directional valve 4. With this structure, the switching between the first hydraulic pump 1 and the second hydraulic pump 2 can be achieved by reversing the first directional valve 4. When the first hydraulic pump 1 fails to work normally, the first directional valve 4 can switch from the first reversing position to the second reversing position, so that the oil pressure of the second hydraulic pump 2 flows into the drive oil circuit through the first directional valve 4, thereby enabling the second hydraulic pump 2 to drive the working component 3 on the platform to perform operations. This structure is simple, easy to control, and helps to quickly realize emergency handling on site.

[0054] Specifically, when the first directional valve 4 is in the first reversing position, the oil outlet of the second hydraulic pump 2 is connected to the oil tank 14, so that the oil of the second hydraulic pump 2 flows back to the oil tank 14 through the oil outlet. With this structural arrangement, the pressure of the second hydraulic pump 2 can be relieved through the first directional valve 4, ensuring that the second hydraulic pump 2 is in standby mode, thereby reducing the equipment response time. When the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 can quickly enter the working state and drive the working parts 3 on the platform to perform operations.

[0055] Specifically, in one embodiment, the first reversing valve 4 is an electrically controlled reversing valve, which simplifies the overall reversing operation and facilitates reversing control.

[0056] Specifically, in another embodiment, the first directional valve 4 is a hydraulically controlled directional valve, and the hydraulic system also includes a priority flow valve 5, which is located between the first hydraulic pump 1 and the first directional valve. The priority port 51 of the priority flow valve 5 is connected to the first directional valve 4. With this structure, the first directional valve 4 can be switched between a first directional valve position and a second directional valve position via the priority flow valve 5. When the first hydraulic pump 1 is running, the priority port 51 of the priority flow valve 5 has oil pressure, which drives the first directional valve 4 to switch, placing it in the first directional valve position. When power is off, the first hydraulic pump 1 has no power output, and the priority port of the priority flow valve 5 has no oil pressure, making it impossible to control the first directional valve 4 to switch. At this time, the first directional valve 4, under the action of an internal spring, pushes the valve core, placing it in the second directional valve position. This structure is simple and allows for rapid switching, facilitating quick on-site emergency response.

[0057] Specifically, the hydraulic system in this embodiment also includes a control oil circuit 8, a control valve 9, a platform relief valve 10, and a sub-platform relief valve 11. The control valve 9 is mounted on the control oil circuit 8. The inlet of the platform relief valve 10 is connected to the flow path between the first hydraulic pump 1 and the first directional valve 4, and the outlet of the platform relief valve 10 is connected to the oil tank 14. The inlet of the sub-platform relief valve 11 is connected to the flow path between the second hydraulic pump 2 and the first directional valve 4, and the outlet of the sub-platform relief valve 11 is connected to the oil tank 14. The control oil circuit 8 can be selectively connected to the platform relief valve 10 and the sub-platform relief valve 11 to control either the platform relief valve 10 or the sub-platform relief valve 11 via the control valve 9. This structural arrangement facilitates the control of either the platform relief valve 10 or the sub-platform relief valve 11 according to actual needs, enabling real-time adjustment of the oil circuit pressure and simplifying control.

[0058] The hydraulic system in this embodiment also includes a pressure detection element 13, which is disposed on the control oil circuit 8. Specifically, the pressure detection element 13 can be a pressure gauge.

[0059] Specifically, the first directional valve 4 is a hydraulically controlled directional valve. The hydraulic system also includes a priority flow valve 5, which is located between the first hydraulic pump 1 and the first directional valve 4. The priority port 51 of the priority flow valve 5 is connected to the drive port of the first directional valve 4. The hydraulic system also includes a second directional valve 12, whose drive port is connected to the priority port 51 of the priority flow valve 5. The second directional valve 12 has a third reversing position and a fourth reversing position. When the second directional valve 12 is in the third reversing position, the control oil circuit 8 is connected to the platform relief valve 10. When the second directional valve 12 is in the fourth reversing position, the control oil circuit 8 is connected to the under-platform relief valve 11. With this structural arrangement, the second directional valve 12 is also a hydraulically controlled valve. The first directional valve 4 and the second directional valve 12 can be synchronously reversed by only controlling the oil pressure at the priority port 51 of the priority flow valve 5, thereby facilitating better control of the platform relief valve 10 or the under-platform relief valve 11.

[0060] Specifically, the platform working component 3 includes a circulating centrifugal pump, a jet centrifugal pump, and a manifold component 34. Both the circulating centrifugal pump and the jet centrifugal pump are connected to the manifold component 34. When the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 drives the circulating centrifugal pump and the jet centrifugal pump to clean the manifold. This avoids mud blockage in the manifold component 34 when the first hydraulic pump 1 is de-energized, and even prevents mud from hardening directly on the manifold component 34 and other parts of the platform working component 3, thus effectively protecting the platform working component 3.

[0061] Specifically, the platform working component 3 also includes a stirring motor; when the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 drives the stirring motor. This configuration prevents the liquid in the mixing tank from hardening due to stagnation, thus facilitating better drainage of the slurry from the mixing tank and reducing the risk of blockage in the platform working component 3.

[0062] Specifically, the platform working component 3 includes a mixing component 31, which is used to mix water and ash to be mixed into slurry. In this way, when the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 can drive the mixing component 31 to perform the operation, preventing the slurry from solidifying in the mixing tank.

[0063] Specifically, the platform working component 3 also includes an ash feeding component 32, which is used to feed the ash to be mixed into the mixing component 31. In this way, when the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 can drive the ash feeding component 32 to operate, stop the continued feeding of dry ash, and prevent dry ash from entering the platform working component 3 and causing blockage.

[0064] Specifically, the platform working component 3 also includes a plunger pump 33, which is used to pump the mud. In this way, when the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 can drive the plunger pump 33 to operate, so that the plunger pump 33 can discharge the mixed cement slurry.

[0065] Specifically, the platform working component 3 also includes a manifold component 34, which is used to transport mud or water. Thus, when the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 can drive the manifold component 34 to operate, discharge the existing mud or water in the manifold component 34, and stop the continued feeding of mud or water.

[0066] Specifically, the platform operating component 3 includes at least one of a ash-lowering valve, a circulation motor, a jetting motor, and a mixing motor. This configuration allows the second hydraulic pump 2 to drive at least one of the ash-lowering valve, circulation motor, jetting motor, and mixing motor to operate when the first hydraulic pump 1 is powered off, thereby reducing the difficulty of subsequent mud cleaning, lowering equipment failure rates, and ensuring emergency operations during power outages.

[0067] Specifically, the hydraulic system also includes a chassis power take-off (PTO), which is connected to the second hydraulic pump 2. This allows the chassis PTO to drive the second hydraulic pump 2, forming a multi-power source configuration with the electrically driven first hydraulic pump 1. This avoids the entire equipment failing if one power source fails, thus reducing the equipment failure rate and ensuring work efficiency.

[0068] Specifically, the chassis power take-off is connected to the drive shaft and then to the hydraulic system via bolts, outputting torque to drive the second hydraulic pump 2.

[0069] Specifically, when the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 drives the lower ash valve to close, and the second hydraulic pump 2 also drives the circulation motor, the injection motor, and the agitator motor to operate. In this way, when the first hydraulic pump 1 is de-energized, the second hydraulic pump 2 can drive the lower ash valve, the circulation motor, the injection motor, and the agitator motor for emergency operation, thereby reducing the difficulty of subsequent mud cleaning and lowering the equipment failure rate.

[0070] Specifically, the hydraulic system also includes detection components.

[0071] In one embodiment, the detection element is a structure such as a current or voltage detector used to directly detect the energization state. The detection element is connected to the first hydraulic pump 1 and is used to detect the energization state of the first hydraulic pump 1. This structural arrangement allows for accurate identification of the energization state of the first hydraulic pump 1 through the detection element. Based on the detection results, the system can quickly control and select either the first hydraulic pump 1 or the second hydraulic pump 2 to drive the platform working component 3, thus improving the timeliness of emergency operations in the hydraulic system.

[0072] In another embodiment, the detection element is used to detect the pressure at the priority port of the priority flow valve 5, so as to detect the energization status of the first hydraulic pump 1 based on the pressure at the priority port. This structural arrangement allows for easy determination that the first hydraulic pump 1 is working normally when there is pressure at the priority port, thus eliminating the need for switching; conversely, when there is no pressure at the priority port, it is determined that the first hydraulic pump 1 is not working normally, i.e., the hydraulic motor is de-energized and not running, at which point the hydraulic system is switched to chassis drive.

[0073] Specifically, the hydraulic system in this embodiment also includes a suction filter 15, a return filter 16, a thermostat 17, a radiator 18, and a hydraulic motor 19. The suction filter 15 filters the oil entering the oil circuit from the oil tank 14, and the return filter 16 filters the oil entering the oil tank 14. The thermostat 17 and the radiator 18 are located on the return branch to facilitate temperature control and heat dissipation of the oil returning to the oil tank 14. The hydraulic motor 19 can be part of the platform working component 3.

[0074] Specifically, using all the aforementioned hydraulic systems (in this embodiment, the hydraulic system is primarily a platform-based hydraulic system), during an emergency switchover, due to a power failure on the platform, both the main motor and the hydraulic motor stop operating. The platform-based hydraulic system and the piston pump are also unable to operate due to the power outage. At this time, all valves in the hydraulic system remain in their original positions. After detecting a power failure in the motor driving the platform-based hydraulic system, the hydraulic system switches to be driven by the chassis power take-off.

[0075] The switchable oil circuit is divided into a main oil circuit and a control oil circuit 8. Specifically, the first directional valve 4 is a hydraulically controlled directional valve. For the switching of the main oil circuit: the hydraulic oil output from the priority port 51 of the priority flow valve 5 serves as the control oil, controlling the control port of the first directional valve 4 to push the first directional valve 4 to switch. After switching, the drive oil circuit of the hydraulic motor switches to the hydraulic pump on the platform, which drives the hydraulic oil output from the hydraulic pump on the platform, and the hydraulic oil output from the hydraulic pump on the platform flows to the oil tank 14 through the first directional valve 4. When a malfunction occurs on the platform and causes a shutdown, the priority port of the priority flow valve 5 does not output control oil due to the shutdown, and cannot push the first directional valve 4 to switch. Under the action of the spring on the other end, the first directional valve 4 returns to its initial position, realizing the switching of the main oil circuit on the platform and on the platform.

[0076] Regarding the switching of control oil circuit 8: the hydraulic oil output from the priority port of the priority flow valve 5 serves as control oil, connected to the control port of the hydraulically controlled first directional valve 4, pushing the hydraulically controlled second directional valve 12 to switch. After switching, the control oil circuit 8 of the platform relief valve 10 is switched to the pressure gauge and control valve 9 circuit, realizing the control valve's control over the platform relief valve 10; the control oil output from the platform relief valve 11 returns to the oil tank 14 through the hydraulically controlled second directional valve 12. When the first hydraulic pump 1 malfunctions and stops, the platform stops, resulting in no control oil output from the priority port of the priority flow valve, preventing the second directional valve 12 from switching. Under the action of the spring at the other end, the hydraulically controlled second directional valve 12 returns to its initial position, switching the control oil circuit of the platform relief valve 11 to the pressure gauge and control valve 9 circuit, realizing the control valve 9's control over the platform relief valve 11. This is how the switching of the platform and platform control oil circuits is achieved.

[0077] After the above switching is completed, in emergency operation, the chassis hydraulic system drives the circulating centrifugal pump and the jet centrifugal pump. The circulating centrifugal pump discharges the slurry from the manifold; the jet centrifugal pump injects clean water into the manifold to clean it, and then discharges the wastewater. The clean water pumped out by the jet centrifugal pump can also be pumped into the mixing tank to clean it. During the cleaning process, the agitator can also be operated for more thorough cleaning.

[0078] Embodiment 2 of this utility model provides a cementing truck, which includes a carrier 6 and the hydraulic system provided in Embodiment 1 above. The hydraulic system is mounted on the carrier. This structural arrangement, through the installation of the first hydraulic pump 1 and the second hydraulic pump 2, ensures that the cementing truck can perform emergency operations in the event of a power outage, thereby reducing the failure rate of the cementing truck and extending its service life.

[0079] Specifically, vehicle 6 can be a vehicle body.

[0080] Specifically, the cementing truck also includes a roller 7, which is mounted on the carrier 6 and positioned above the carrier 6. Electrical cables are wound around the roller 7 and are electrically connected to the first hydraulic pump 1 of the hydraulic system. This allows the cementing truck to be electrically driven, enabling connection to the well site power supply via the cables wound on the roller 7, eliminating the need for a separate vehicle to transport the cables or cable rollers. Furthermore, controlling the rotation and stopping of the roller facilitates cable laying before operation and cable retrieval after completion, helping to reduce the labor intensity for the user.

[0081] Specifically, the working principle of this utility model is as follows: If an external power failure occurs during operation and the main motor and hydraulic system auxiliary motor on the platform cannot work, the control system can automatically start the chassis after detecting the power cut-off. The chassis is equipped with an emergency hydraulic system (equivalent to a second hydraulic pump 2), which can drive the circulating centrifugal pump, the jet centrifugal pump, the mixing tank stirring motor and the ash discharge valve, so that the equipment can close the ash discharge valve and stop the dry ash feeding. At the same time, the cement slurry in the mixing tank can be discharged by the centrifugal pump to avoid the cement slurry solidifying and causing losses.

[0082] The chassis full-power power take-off (PTO) drives the circulating hydraulic pump, the jetting hydraulic pump, and the agitation hydraulic pump as a backup. The power of the first hydraulic pump 1 is switched via the first directional valve 4. The control oil of the first directional valve 4 is connected to the priority port 51 of the priority flow valve 5. When the first hydraulic pump 1 is running, there is oil pressure at the priority port 51 of the priority flow valve 5. This oil pressure drives the first directional valve 4 to switch, connecting the power of the first hydraulic pump 1 to the circulating motor, the jetting motor, and the agitation motor. Simultaneously, the second hydraulic pump 2 is depressurized, and its output hydraulic oil flows directly to the oil tank 14 through the first directional valve 4. In this way, under normal power supply conditions, the electric-driven cementing can normally use the first hydraulic pump. Hydraulic pump 1 is in operation, while the second hydraulic pump 2 is in standby mode. When power is off, the first hydraulic pump 1 has no power output, and the priority port 51 of the priority flow valve 5 has no oil pressure, making it impossible to control the first directional valve 4 to switch. At this time, the first directional valve 4, under the action of its internal spring, pushes the valve core, causing the first directional valve 4 to work in another position (equivalent to the second switching position), connecting the power of the second hydraulic pump 2 to the circulation motor, the injection motor, and the stirring motor respectively. At the same time, the output pipeline of the first hydraulic pump 1 is connected to the oil tank 14 through the first directional valve 4. This realizes the switching of power from the platform to the chassis for the circulation, injection, and stirring motors. The entire process requires no operation and can quickly achieve on-site emergency handling.

[0083] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: in the event of a power outage, the chassis vehicle can be activated to drive the backup hydraulic system, ensuring the emergency operation of the mixing system, manifold system, and pumping system, and effectively protecting the equipment in an emergency.

[0084] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0085] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0086] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0087] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0088] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0089] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hydraulic system, characterized in that, include: The first hydraulic pump (1) and the second hydraulic pump (2) are electrically driven and oil-driven respectively. The first hydraulic pump (1) and the second hydraulic pump (2) can selectively drive the working parts (3) on the platform to perform operations. The first hydraulic pump (1) has an energized state and an de-energized state; when the first hydraulic pump (1) is in the energized state, the first hydraulic pump (1) drives the platform working component (3) to perform operations, and the second hydraulic pump (2) is in a standby state; when the first hydraulic pump (1) is in the de-energized state, the second hydraulic pump (2) drives the platform working component (3) to perform operations.

2. The hydraulic system according to claim 1, characterized in that, The hydraulic system also includes: The first reversing valve (4) is installed on the pipeline connecting the first hydraulic pump (1) and the second hydraulic pump (2). The oil pressure outlet of the first reversing valve (4) is connected to the driving oil circuit for driving the platform working component (3). The first reversing valve (4) has a first reversing position and a second reversing position. When the first reversing valve (4) is in the first reversing position, the oil pressure of the first hydraulic pump (1) flows into the drive oil circuit through the first reversing valve (4); when the first reversing valve (4) is in the second reversing position, the oil pressure of the second hydraulic pump (2) flows into the drive oil circuit through the first reversing valve (4).

3. The hydraulic system according to claim 2, characterized in that, When the first reversing valve (4) is in the first reversing position, the oil outlet of the second hydraulic pump (2) is connected to the oil tank (14) so ​​that the oil of the second hydraulic pump (2) flows back to the oil tank (14) through the oil outlet.

4. The hydraulic system according to claim 2, characterized in that, The first directional valve (4) is an electrically controlled directional valve; or, The first directional valve (4) is a hydraulically controlled directional valve. The hydraulic system also includes a priority flow valve (5). The priority flow valve (5) is located between the first hydraulic pump (1) and the first directional valve (4). The priority port (51) of the priority flow valve (5) is connected to the first directional valve (4).

5. The hydraulic system according to claim 2, characterized in that, The hydraulic system also includes: Control oil circuit (8) and control valve (9), wherein the control valve (9) is disposed on the control oil circuit (8); The platform overflow valve (10) has an oil inlet that is connected to the flow path between the first hydraulic pump (1) and the first directional valve (4), and an oil outlet that is connected to the oil tank (14). The under-stage overflow valve (11) has its inlet connected to the flow path between the second hydraulic pump (2) and the first directional valve (4), and its outlet connected to the oil tank (14). The control oil circuit (8) can be selectively connected to the platform overflow valve (10) and the under-platform overflow valve (11) to control the platform overflow valve (10) or the under-platform overflow valve (11) through the control valve (9).

6. The hydraulic system according to claim 5, characterized in that, The first directional valve (4) is a hydraulically controlled directional valve. The hydraulic system also includes a priority flow valve (5), which is located between the first hydraulic pump (1) and the first directional valve (4). The priority port (51) of the priority flow valve (5) is connected to the drive port of the first directional valve (4). The hydraulic system also includes: The second directional valve (12) has a drive port connected to the priority port (51) of the priority flow valve (5). The second directional valve (12) has a third directional position and a fourth directional position. When the second directional valve (12) is in the third directional position, the control oil circuit (8) is connected to the platform overflow valve (10). When the second directional valve (12) is in the fourth directional position, the control oil circuit (8) is connected to the platform overflow valve (11).

7. The hydraulic system according to claim 1, characterized in that, The platform working component (3) includes a circulating centrifugal pump, a jet centrifugal pump, and a manifold assembly (34), both of which are connected to the manifold assembly (34). When the first hydraulic pump (1) is in the de-energized state, the second hydraulic pump (2) drives the circulating centrifugal pump and the jet centrifugal pump to clean the manifold; and / or, The platform working component (3) also includes a ash discharge valve; when the first hydraulic pump (1) is in the de-energized state, the second hydraulic pump (2) drives the ash discharge valve to close; and / or, The platform working component (3) also includes a stirring motor; when the first hydraulic pump (1) is in the power-off state, the second hydraulic pump (2) drives the stirring motor to run.

8. The hydraulic system according to claim 1, characterized in that, The platform working component (3) includes: Mixing component (31), said mixing component (31) is used to mix water and ash to be mixed into a slurry; and / or, Ash feeding component (32), said ash feeding component (32) is used to feed the ash to be mixed into the mixing component (31); and / or, A plunger pump (33) for pumping mud; and / or, Manifold (34) for conveying mud or water.

9. The hydraulic system according to claim 2, characterized in that, The hydraulic system also includes a detection component; The detection element is connected to the first hydraulic pump (1), and the detection element is used to detect the energization status of the first hydraulic pump (1); or, The first directional valve (4) is a hydraulically controlled directional valve. The hydraulic system also includes a priority flow valve (5). The priority flow valve (5) is located between the first hydraulic pump (1) and the first directional valve (4). The priority port (51) of the priority flow valve (5) is connected to the first directional valve (4). The detection element is used to detect the pressure of the priority port (51) of the priority flow valve (5) so as to detect the energization status of the first hydraulic pump (1) according to the pressure of the priority port.

10. A cementing truck, characterized in that, include: Vehicle (6); The hydraulic system according to any one of claims 1 to 9, wherein the hydraulic system is disposed on the vehicle.

11. The cementing truck according to claim 10, characterized in that, The cementing vehicle also includes a roller (7), which is mounted on the carrier (6) and positioned above the carrier (6); The roller (7) is wound with electrical wires and cables, which are electrically connected to the first hydraulic pump (1) of the hydraulic system; and / or, The first hydraulic pump (1) of the hydraulic system is driven to be connected to the roller (7).

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