Pumping apparatus and fracturing equipment

Abstract

This application relates to the field of fracturing equipment technology, and discloses a pumping device and fracturing equipment. The device includes a first drive system, a second drive system, and a hydraulic system. The first drive system includes a first drive component and a first pump body connected by a drive; the second drive system includes a second drive component and a second pump body connected by a drive, wherein the maximum output power of the first drive component is greater than or equal to the maximum output power of the second drive component, and the output power of the second drive component can be continuously adjusted. The hydraulic system connects the first pump body and the second pump body respectively. The device can provide a large displacement output by operating the first drive system independently, provide a small displacement precise output by operating the second drive system independently, or operate the two systems in combination. By adjusting the output of the second drive component, the displacement of the device can be steplessly compensated, thereby achieving continuous and precise adjustment of the total output displacement, effectively solving the problem of discontinuous displacement adjustment in traditional single-power-source pumping devices.

Description

Technical Field

[0001] This invention relates to the field of fracturing equipment technology, specifically to a pumping device and fracturing equipment. Background Technology

[0002] In oil and gas field fracturing operations, the pumping unit is the core equipment, and the continuity and accuracy of its displacement output directly affect the fracturing effect. Currently, miniaturized and modular dual-machine dual-pump fracturing equipment is usually driven by a single power source (such as a fuel engine), and the output displacement is controlled by adjusting the engine speed and switching gearbox gears.

[0003] However, this traditional single-power drive method suffers from low displacement control precision: First, its displacement adjustment relies on a limited engine speed range and discrete gearbox gears, resulting in a stepped change in displacement output, making continuous stepless adjustment impossible and limiting the displacement coverage. Second, when faced with complex operating conditions requiring extremely low displacement or high-precision fine-tuning of displacement, the control precision of existing equipment is insufficient. Summary of the Invention

[0004] In view of this, the present invention provides a pumping device and fracturing equipment to solve the problem of "low displacement control accuracy of the pumping device when meeting high power requirements".

[0005] In a second aspect, the present invention provides a pumping device, including a first drive system, a second drive system, and a liquid circuit system; the first drive system includes a first drive component and a first pump body connected by a drive; the second drive system includes a second drive component and a second pump body connected by a drive, wherein the maximum output power of the first drive component is greater than or equal to the maximum output power of the second drive component, and the output power of the second drive component can be continuously adjusted; the liquid circuit system connects the first pump body and the second pump body.

[0006] Beneficial effects: By integrating first and second drive components with different rated power into the same device, and utilizing the steplessly adjustable second drive component, the output power can be continuously and smoothly adjusted between zero and maximum value, enabling the device to simultaneously possess both high-power basic output and low-power precise control capabilities. Furthermore, by achieving fluid supply and channel interconnection between the first and second pump bodies through the same hydraulic system, the device structure is simplified, system integration is improved, and the collaborative operation capability of the two pumps is enhanced. Through coordinated control of the drive components and hydraulic valves, the device can flexibly achieve independent operation of a single pump or combined pumping of both pumps, significantly broadening the displacement coverage range and achieving stepless precise control of displacement, thus better adapting to the demands of complex operating conditions for wide-range and high-precision displacement adjustment.

[0007] In one alternative implementation, the first drive member has multiple gears, and the difference in output power between adjacent gears of the first drive member is less than or equal to the maximum output power of the second drive member.

[0008] Beneficial effects: The gear settings of the first drive unit are designed to match the maximum power or displacement range of the second drive unit. Understandably, in commonly used operating gears, the displacement difference between adjacent gears of the first drive unit should fall entirely within the continuously adjustable displacement range of the second drive unit, thus ensuring a seamless and continuous transition of total displacement in combined mode and avoiding adjustment dead zones.

[0009] In one optional embodiment, the liquid circuit system includes a piping assembly and a valve assembly. The piping assembly includes a first branch, a second branch, and a third branch. The first branch is connected to a first pump body, the second branch is connected to a second pump body, and the first and second branches intersect at the third branch. The valve assembly includes a first valve body, a second valve body, and a third valve body. The first valve body is located in the first branch, the second valve body is located in the second branch, and the third valve body is located in the third branch. The outlet of the third valve body constitutes the first liquid outlet of the liquid circuit system.

[0010] Beneficial effects: In this embodiment, by operating the first valve body and the second valve body, it is possible to independently control whether the high-pressure fluid flowing out from the first pump body or the second pump body is allowed to enter the third branch; while operating the third valve body can control whether the fluid after the convergence is finally output to the working pipeline. Thus, the output state of the entire liquid circuit system can be controlled by the coordinated opening and closing of the three valve bodies.

[0011] In one optional implementation, under a first operating condition, the first drive system, the first valve body, and the third valve body are activated, while the second drive system and the second valve body are closed; under a second operating condition, the second drive system, the second valve body, and the third valve body are activated, while the first drive system and the first valve body are closed; under a third operating condition, the first drive system, the second drive system, and the valve assembly are all activated.

[0012] Beneficial Effects: In this embodiment, by activating the first drive unit and cooperating with the corresponding valve body to open during the first operating condition of large-displacement operation, the basic output requirement of large flow rate is met. During the second operating condition of precise small-displacement operation, the continuous adjustment function of the second drive unit is used to drive the second pump body independently, achieving fine control of the displacement. In the third operating condition requiring wide-range stepless adjustment, the first and second drive units are activated simultaneously while keeping the valve body assembly fully open, allowing the fluids from both pumps to merge and output together. By adjusting the output power of the second drive unit, continuous, precise compensation and stepless adjustment of the total displacement are achieved above the basic displacement provided by the first drive unit. Through flexible switching and coordinated control of multiple operating conditions, the displacement coverage range is significantly broadened, achieving seamless connection and precise control from large-flow basic output to small-flow fine-tuning.

[0013] In one alternative embodiment, the first drive system further includes a transmission component that drives the first drive component and the first pump body, and the transmission component can adjust the output displacement of the first pump body by gear.

[0014] Beneficial effects: The transmission component is specifically a gearbox with multiple gears, which changes the transmission ratio by switching internal gear sets. When the operator switches gears, the output power of the first pump body is changed. Therefore, by adjusting the input speed of the first pump body in stages through the transmission component, the key parameter of the first pump body's output displacement can be adjusted in stages, providing a wide range of multi-stage basic displacement output capabilities for the entire pumping device.

[0015] In one alternative embodiment, the second drive system further includes an adjustment element connected to the second drive element, which can continuously adjust the output power of the second drive element.

[0016] Beneficial effects: The second driving component is usually a motor, and the regulating component is a frequency converter. The frequency converter can steplessly adjust the output power of the second driving component by changing parameters such as the power frequency or voltage input to the motor, thereby achieving stepless control of the output displacement of the second pump body.

[0017] In one optional embodiment, the piping assembly further includes a fourth branch and a fifth branch, the fourth branch being connected to the first branch and the fifth branch being connected to the second branch; the valve assembly further includes a fourth valve body and a fifth valve body, the fourth valve body being disposed in the fourth branch and the fifth valve body being disposed in the fifth branch; wherein, the fourth valve body constitutes the second liquid outlet of the liquid circuit system and the fifth valve body constitutes the third liquid outlet of the liquid circuit system.

[0018] Beneficial effects: In this embodiment, the piping assembly is also provided with two additional liquid outlets, allowing for multiple fluid output methods, including but not limited to direct external output via independent fluid paths. This provides additional configuration flexibility for parallel output, independent testing, or backup output for field piping connections. It increases the pumping unit's adaptability to complex operational processes and field piping requirements.

[0019] In one optional embodiment, the first pump body is provided with a first liquid inlet, the second pump body is provided with a second liquid inlet, and the first liquid inlet and the second liquid inlet are connected to an external fluid supply device.

[0020] Beneficial effects: In this embodiment, through this structural design, the two drive systems achieve parallel liquid supply from the same supply system at the liquid inlet source, while maintaining the independence and controllability of the liquid inlet path. This ensures that the suction conditions of each pump are stable and do not interfere with each other when operating a single pump, operating two pumps in parallel, or switching operating modes, thus guaranteeing the continuity and reliability of pumping operations under all working conditions from the fluid supply perspective.

[0021] In one alternative implementation, the first drive system and the second drive system are arranged side by side or stacked.

[0022] Beneficial effects: In this embodiment, the integrated design makes the pumping device structure more compact and stable, improving the space utilization efficiency of the device.

[0023] In a second aspect, the present invention provides a fracturing device, including the pumping device described in the first aspect.

[0024] The technical solution proposed in this application has at least the following technical effects:

[0025] The pumping device of this application integrates a first drive system with a large maximum output power but limited adjustment methods with a second drive system with a smaller maximum output power but continuously adjustable output power. The two systems converge and output to the work position via a hydraulic system. This technical solution firstly achieves a wide range and high-precision continuous adjustment of the displacement output. The first drive system provides the basic large displacement output, while the second drive system, with its continuously adjustable output power, can perform fine, stepless compensation and fine-tuning of the total displacement. Working together, the two systems not only broaden the overall displacement coverage of the device but also fundamentally overcome the shortcomings of traditional single-drive devices, which exhibit stepped displacement adjustments and lack continuous control. This meets the stringent process requirements for precise and smooth displacement control in operations such as fracturing.

[0026] Furthermore, the two drive systems can operate independently or in combination, enabling the device to flexibly cope with diverse operating scenarios: it is suitable for long-duration, high-displacement main operations, as well as small-displacement, high-precision fine operations. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Fig. 1 This is a schematic diagram of the drive system structure of a pumping device according to an embodiment of the present invention; Fig. 2 This is a schematic diagram of the liquid circuit system of a pumping device according to an embodiment of the present invention; Fig. 3 This is a schematic diagram of another structure of the liquid circuit system of a pumping device according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures: 1. First drive system; 101. First drive component; 102. First pump body; 1021. First liquid inlet; 103. Transmission component; 2. Second drive system; 201. Second drive component; 202. Second pump body; 2021. Second liquid inlet; 203. Adjustment component; 3. Piping assembly; 301. First branch; 302. Second branch; 303. Third branch; 304. Fourth branch; 305. Fifth branch; 4. Valve assembly; 401. First valve body; 402. Second valve body; 403. Third valve body; 404. Fourth valve body; 405. Fifth valve body; 5. Power supply; 6. First check valve; 7. Second check valve. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to impose strict limitations on the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "the" to modify a feature does not preclude the possibility that the feature may be plural in other embodiments.

[0032] It should be understood that the terms "comprising," "including," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of other features in the embodiment. Similarly, the use of terms such as "first," "second," etc., to describe multiple features only indicates the distinction between one feature and another, and such terms do not imply order or sequence unless explicitly stated in the context.

[0033] It should be understood that, unless the context clearly indicates otherwise, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.

[0034] In addition, for ease of description, the text will use terms of spatial relative relationship to describe the position of one feature relative to another feature, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.

[0035] The background technology will be further explained below.

[0036] In oil and gas field fracturing operations, the pumping unit is the core equipment, and the continuity and accuracy of its displacement output directly affect the fracturing effect. Currently, miniaturized and modular dual-machine dual-pump fracturing equipment is usually driven by a single power source (such as a fuel engine), and the output displacement is controlled by adjusting the engine speed and switching gearbox gears.

[0037] However, this traditional single-power drive method suffers from low displacement control precision: First, its displacement adjustment relies on a limited engine speed range and discrete gearbox gears, resulting in a stepped change in displacement output, making continuous stepless adjustment impossible and limiting the displacement coverage. Second, when faced with complex operating conditions requiring extremely low displacement or high-precision fine-tuning of displacement, the control precision of existing equipment is insufficient.

[0038] It should be noted that a pumping device refers to a complete set of equipment that converts the mechanical energy of a prime mover into the pressure and kinetic energy of a fluid, and controls its parameters such as displacement and pressure. Its core function is to achieve continuous and controllable fluid transport. A complete pumping device typically consists of a power source (such as an engine or electric motor), a transmission mechanism, one or more pump bodies (such as a plunger pump or centrifugal pump), and connecting pipelines, valves, and control elements. Its performance is primarily reflected in the range of output displacement, the continuity and accuracy of adjustment, and the system's operating pressure rating.

[0039] Furthermore, in the technical field of fracturing equipment involved in this application, the pumping device specifically refers to the most critical high-pressure fluid generation unit in the equipment. It is responsible for pressurizing the fracturing fluid from the sand mixing system to the high pressure required for formation fracturing and injecting it into the wellbore at a precisely controllable discharge rate. Fracturing equipment is large-scale construction equipment used in oil and gas field production enhancement operations; its core function is to inject fracturing fluid under high pressure into the formation to form fractures. Traditional fracturing equipment typically consists of a power system, transmission system, pumping system, sand mixing system, manifold system, etc. The pumping device involved in this application is precisely the core pumping unit in such fracturing equipment. Compared to traditional fracturing equipment that uses only a single, stepped power source for its pumping unit, fracturing equipment integrating the pumping device of this application significantly improves the performance of traditional fracturing equipment's pumping device in terms of continuous displacement adjustment and operating condition adaptability by integrating power sources with different characteristics and an optimized hydraulic system. It can achieve more precise displacement control, a wider range of operating conditions, and higher operational efficiency, thereby meeting the growing demand of modern fracturing technology for precise control of construction parameters.

[0040] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.

[0041] The following is combined Figs. 1 to 3 The following describes embodiments of the present invention.

[0042] According to an embodiment of the present invention, in a first aspect, the present invention provides a pumping device, including a first drive system 1, a second drive system 2, and a liquid circuit system; the first drive system 1 includes a first drive member 101 and a first pump body 102 driven together; the second drive system 2 includes a second drive member 201 and a second pump body 202 driven together, wherein the maximum output power of the first drive member 101 is greater than or equal to the maximum output power of the second drive member 201, and the output power of the second drive member 201 can be continuously adjusted; the liquid circuit system connects the first pump body 102 and the second pump body 202.

[0043] In this embodiment, the first drive component 101 in the first drive system 1 is driven to the first pump body 102 via a first transmission assembly. The second drive component 201 in the second drive system 2 is driven to the second pump body 202 via a second transmission assembly. The rated maximum output power of the first drive component 101 is greater than or equal to the rated maximum output power of the second drive component 201. To achieve continuous adjustment of the output power of the second drive component 201, a speed regulating mechanism is connected to the second drive component 201. This speed regulating mechanism can receive control signals and correspondingly change the operating parameters of the second drive component 201, thereby achieving continuous and smooth adjustment of its output power between zero and its maximum value.

[0044] Furthermore, the fluid system includes a suction line, a discharge line, and connecting lines. The suction line is configured to supply working fluid to the first pump body 102 and the second pump body 202. The discharge line is used to transport the pressurized fluid. The connecting lines enable the fluid channels of the first pump body 102 and the second pump body 202 to be interconnected, thereby enabling the merging or splitting of fluids. In this embodiment, by coordinating and controlling the first drive unit 101, the second drive unit 201, and related valves in the fluid system, the first pump body 102 and the second pump body 202 can participate in pumping operations individually or jointly.

[0045] It should be noted that in this embodiment, the same set of liquid circuit system is used to supply fluid to the first pump body 102 and the second pump body 202 at the same time, so that the two are coupled in action. Compared with arranging liquid circuit systems for the two separately, this embodiment ensures that the equipment is more streamlined and can improve the coordination between the first pump body 102 and the second pump body 202.

[0046] In this embodiment, the pumping device specifically includes: a first drive system 1, which is composed of a first drive component 101 with a higher maximum output power and a first pump body 102 driven and connected; a second drive system 2, which is composed of a second drive component 201 with continuously adjustable output power and a second pump body 202 driven and connected, and the second drive component 201 is equipped with a stepless speed regulation device; a hydraulic system is connected to the inlet and outlet of the two pumps through pipelines equipped with multiple valves, the hydraulic system including a suction pipeline, a discharge pipeline and a connecting pipeline, the suction pipeline is configured to supply working fluid (such as fracturing fluid mixed with sand and gravel) to the first pump body 102 and the second pump body 202, the discharge pipeline is used to transport the pressurized fluid, and the connecting pipeline enables the fluid channels of the first pump body 102 and the second pump body 202 to be interconnected, thereby enabling the fluid to merge or split. By coordinating and controlling the first drive component 101, the second drive component 201 and the relevant valves in the hydraulic system, the first pump body 102 and the second pump body 202 can participate in pumping operations individually or together. The rated maximum output power of the first drive unit 101 is greater than or equal to the rated maximum output power of the second drive unit 201.

[0047] Understandably, the first pump body 102 and the second pump body 202 can have the same displacement range to achieve complete redundancy in the pumping device's displacement, or they can be of different specifications to achieve higher precision displacement coverage. For example, the first pump body 102 can be a large-displacement pump, and the second pump body 202 can be a small-displacement pump. Both can be equipped with separate lubrication systems and plunger flushing systems to improve the lifespan of core components.

[0048] Furthermore, the device can achieve three operating modes by controlling the opening and closing of the valve group: driving the first pump body 102 for high-displacement operations; driving the second pump body 202 for low-displacement precision operations; and a combined mode, where the two drive systems operate in coordination. The maximum output power of the second drive component 201 is designed to cover the displacement difference between adjacent gears of the first drive component 101. By adjusting the output power of the second drive component 201, the basic displacement of the first drive component 101 is continuously compensated, enabling a single unit to achieve stepless and precise control of the output displacement while meeting certain power requirements, significantly improving the adaptability and adjustment accuracy of fracturing operations.

[0049] In this embodiment, the first driving component 101 is a diesel generator, and the second driving component 201 is an electric motor.

[0050] Furthermore, the first drive unit 101 is not limited to a diesel engine, a natural gas engine, a gas turbine, or other forms of internal combustion engine; the second drive unit 201 is not limited to a three-phase AC motor, a permanent magnet synchronous motor, or other forms of rotating motor. Specifically, the first drive unit 101 needs to have the basic power output capability to achieve stepped or wide-range adjustment through mechanical transmission, while the second drive unit 201 needs to have the auxiliary power output capability to achieve high-precision, continuously stepless adjustment through electric regulation.

[0051] It should be noted that the second drive unit 201 may also be an internal combustion engine component that can be continuously adjusted.

[0052] Furthermore, the second drive system 2, represented by electric drive, typically has higher energy efficiency and response speed under partial load. Through precise adjustment, the first drive system 1 (such as an internal combustion engine) can be prevented from operating in the inefficient range, thereby helping to reduce overall energy consumption and operating costs, and achieving synergistic optimization of operational performance and economic benefits.

[0053] It should be noted that the pumping device in this embodiment has a non-fixed displacement output range, which can be flexibly matched and selected according to the actual working conditions and site requirements. Specifically, by selecting different specifications of the first pump body 102 and the second pump body 202, adjusting the transmission ratio configuration of the first drive system 1 and the motor power level of the second drive system 2, different basic displacement levels and continuous adjustment ranges can be achieved. For example, in scenarios requiring small-displacement precision operations, a smaller displacement pump body combination can be selected to maintain high-precision adjustment capability within the small displacement range; in scenarios requiring large-displacement main operations, a large displacement pump body can be selected in conjunction with a high-power first drive component 101 to cover the large displacement requirements in the main output range of the device, while the output is finely compensated by the second drive system 2 to achieve continuous stepless adjustment. In addition, for different formation characteristics and fracturing process requirements, operators can further optimize the displacement output characteristics and pressure matching of the device by replacing or adjusting the valve body diameter in the valve assembly 4 and selecting manifold components of different pressure levels. The pumping device of the present invention is designed with full consideration of the diversity of practical applications. Its displacement range can be customized according to specific application scenarios, thereby ensuring optimal operating performance and economy under different geological conditions and process requirements.

[0054] In one embodiment, the first drive unit 101 has multiple gears, and the difference in output power between adjacent gears of the first drive unit is less than or equal to the maximum output power of the second drive unit 201.

[0055] In this embodiment, the gear setting of the first drive unit 101 is designed to match the maximum power or displacement range of the second drive unit 201. Understandably, in commonly used operating gears, the displacement difference between adjacent gears of the first drive unit 101 should fall entirely within the continuously adjustable displacement range of the second drive unit 201, thereby ensuring a seamless and continuous transition of total displacement in combined mode and avoiding adjustment dead zones.

[0056] In one embodiment, the liquid circuit system includes a pipeline assembly 3 and a valve assembly 4. The pipeline assembly 3 includes a first branch 301, a second branch 302, and a third branch 303. The first branch 301 is connected to the first pump body 102, the second branch 302 is connected to the second pump body 202, and the first branch 301 and the second branch 302 intersect at the third branch 303. The valve assembly 4 includes a first valve body 401, a second valve body 402, and a third valve body 403. The first valve body 401 is located in the first branch 301, the second valve body 402 is located in the second branch 302, and the third valve body 403 is located in the third branch 303. The outlet of the third valve body 403 constitutes the first liquid outlet of the liquid circuit system.

[0057] In this embodiment, the piping assembly 3 includes a first branch 301, a second branch 302, and a third branch 303, and the valve assembly 4 includes a first valve body 401, a second valve body 402, and a third valve body 403. The first valve body 401 is fixedly installed on the first branch 301 via a flange connection, with its inlet connected to the pump outlet and its outlet connected to the third branch 303. The second valve body 402 is installed on the first branch 301 in the same manner, with its outlet connected to the third branch 303. The first branch 301 and the second branch 302 intersect at the third branch 303, forming a manifold. The third valve body 403 is installed on the third branch 303, and its valve body outlet is connected to an external working pipeline, thereby constituting the fluid output end of the hydraulic system. By operating the first valve body 401 and the second valve body 402, it is possible to independently control whether the high-pressure fluid flowing out from the first pump body 102 or the second pump body 202 is allowed to enter the third branch 303; while operating the third valve body 403 can control whether the fluid after the convergence is finally output to the working pipeline. Thus, the output status of the entire liquid circuit system can be controlled by the coordinated opening and closing of the three valve bodies.

[0058] Furthermore, a one-way valve is provided on the pipeline between the outlet of the first pump body 102 and the first valve body 401, and on the pipeline between the outlet of the second pump body 202 and the second valve body 402.

[0059] Specifically, the first check valve 6 is installed between the outlet flange of the first pump body 102 and the inlet flange of the first valve body 401, allowing fluid to flow from the pump body to the valve body and automatically preventing reverse flow; the second check valve 7 is installed in the same manner between the second pump body 202 and the second valve body 402. The third valve body 403, as before, is located at the end of the third branch 303 downstream of the first valve body 401 and the second valve body 402 as an outlet. This structure ensures that when any pump body stops working or its outlet valve body is closed, the outlet pipeline of that pump body can be automatically isolated by the corresponding check valve, effectively preventing backflow of high-pressure fluid from the manifold or another working pump, thereby protecting the pump body and ensuring system pressure stability, while not affecting the normal output function of each pump in independent or combined modes.

[0060] Specifically, the first valve body 401, the second valve body 402, and the third valve body 403 are plug valves.

[0061] Furthermore, the first valve body 401, the second valve body 402, and the third valve body 403 can all or partially adopt shut-off valves. Specifically, the positional relationship and opening / closing logic of each valve body in the pipeline must meet the requirements of the three basic operating modes and the independent output mode, and be able to withstand the high pressure generated by the pumping system. It should be noted that valve assembly 4 is the key to realizing multiple operating modes. In addition to the plug valves and shut-off valves already mentioned, under high pressure and high flow conditions, the valve body can also be selected as a hydraulically controlled flat gate valve or a forced-seal ball valve to ensure reliable sealing and long service life. The addition of a check valve is a key safety and isolation design. Its installation position is not limited to between the pump outlet and the branch valve body, but can also be considered for addition in the manifold or other key nodes to further prevent fluid backflow or pressure shock. In addition, the control method of valve assembly 4 can be manual, hydraulic, pneumatic, or electric, and can be configured with valve position status sensors (such as limit switches) to provide feedback signals to the monitoring system, providing a basis for realizing remote monitoring and automated control. The fourth valve body 404 and the fifth valve body 405 are independent output ports, and their design needs to be adapted to the quick connection interface of the external high-pressure manifold to adapt to the connection methods commonly used in fracturing sites.

[0062] In one optional implementation, in a first operating condition, the first drive system 1, the first valve body 401, and the third valve body 403 are activated, while the second drive system 2 and the second valve body 402 are closed; in a second operating condition, the second drive system 2, the second valve body 402, and the third valve body 403 are activated, while the first drive system 1 and the first valve body 401 are closed; in a third operating condition, the first drive system 1, the second drive system 2, and the valve assembly 4 are all activated.

[0063] In this embodiment, under the first operating condition of high-displacement operation, the first drive unit 101 is activated, causing the first pump body 102 to operate, while keeping the first valve body 401 and the third valve body 403 open. The second drive unit 201 and the second valve body 402 can be opened or closed depending on the displacement requirements. At this time, the fluid is mainly discharged from the first pump body 102 and output through the opened third valve body 403. Under the second operating condition of low-displacement precision operation, the second drive unit 201 is activated, driving the second pump body 202 through its continuous adjustment function, while keeping the second valve body 402 and the third valve body 403 open, and ensuring that the first drive unit 101 is stopped and the first valve body 401 is closed. At this time, the fluid is mainly discharged from the second pump body 102 and output through the opened third valve body 403. The fluid discharged from pump body 202 is output through the opened second valve body 402 and third valve body 403. In the third operating condition requiring stepless adjustment, the first drive unit 101 and the second drive unit 201 are simultaneously activated, and the first valve body 401, the second valve body 402, and the third valve body 403 are all kept open. At this time, the first pump body 102 and the second pump body 202 operate synchronously. The discharged fluids from both are combined through the first valve body 401 and the second valve body 402, and then jointly output through the third valve body 403. By independently adjusting the output power of the second drive unit 201, continuous, precise compensation and stepless adjustment of the total output displacement can be achieved on top of the basic displacement provided by the first drive unit 101. A one-way valve is also installed between each pump outlet and the corresponding valve body. The one-way valve can effectively prevent undesirable crossflow or backflow of fluid between the pump outlet pipelines under any operating condition.

[0064] In one embodiment, the first drive system 1 further includes a transmission component 103, which is connected to the first drive component 101 and the first pump body 102. The transmission component 103 can adjust the output displacement of the first pump body 102.

[0065] In this embodiment, a transmission member 103 is provided between the first drive member 101 and the first pump body 102. The transmission member 103 is connected to both the output end of the first drive member 101 and the input end of the first pump body 102. Specifically, the transmission member 103 is a gearbox with multiple gears, which changes the transmission ratio by switching internal gear sets. When the operator switches gears, the rotational speed of the output shaft relative to the input shaft changes, thereby directly adjusting the input rotational speed of the first pump body 102. Since the output displacement of the plunger pump is proportional to the input rotational speed, by adjusting the input rotational speed of the first pump body 102 in stages through the transmission member 103, the key parameter of the output displacement of the first pump body 102 can be adjusted in stages, providing a wide range and multiple gears of basic displacement output capability for the entire pumping device.

[0066] Furthermore, the transmission component 103 is not limited to a mechanical gearbox, but can also be a combination of a hydraulic torque converter and a gearbox. Its core function is to receive power from the first drive component 101 and to adjust the displacement of the first pump body 102 by changing the output speed.

[0067] In one embodiment, the second drive system 2 further includes an adjustment member 203, which is connected to the second drive member 201 and can adjust the output power of the second drive member 201.

[0068] In this embodiment, the regulating member 203, electrically connected to the second drive member 201, is specifically a frequency converter installed in the power supply circuit of the second drive member 201. The input terminal of the frequency converter is connected to the power supply 5 (such as an external power grid or battery pack), and its output terminal is connected to the power supply 5 input terminal of the second drive member 201 (i.e., the motor). The frequency converter can receive externally given speed or frequency command signals and adjust the frequency and voltage of its output AC power in real time and continuously according to the signals. By changing the frequency of the power supply 5 input to the motor, the regulating member 203 can smoothly and steplessly adjust the operating speed of the second drive member 201, thereby directly and continuously changing its output torque and power parameters. This continuous adjustment capability is transmitted to the second pump body 202, ultimately realizing precise and stepless control of the output displacement of the second pump body 202.

[0069] Furthermore, the regulating component 203 is not limited to frequency converters that achieve stepless speed regulation; it can also be a servo drive, a DC speed controller, or any power electronic device capable of precisely and continuously controlling the speed and torque of the motor. The regulating component 203 is designed to receive external commands and accordingly adjust the electrical input parameters of the second drive component 201 in real time and smoothly, thereby achieving continuous and linear control of the motor's output mechanical power. This continuously adjustable characteristic is the technical basis for the present invention to achieve fine displacement compensation and stepless regulation.

[0070] Alternatively, the power source 5 for the electric motor can be an independent battery pack, a built-in power generation unit (such as a generator driven by the first drive unit 101), or an external industrial power grid, which provides a variety of solutions for the applicability of the equipment under different energy conditions.

[0071] In one optional embodiment, the piping assembly 3 further includes a fourth branch 304 and a fifth branch 305, the fourth branch 304 being connected to the first branch 301 and the fifth branch 305 being connected to the second branch 302; the valve assembly 4 further includes a fourth valve body 404 and a fifth valve body 405, the fourth valve body 404 being disposed in the fourth branch 304 and the fifth valve body 405 being disposed in the fifth branch 305; wherein, the fourth valve body 404 constitutes the second liquid outlet of the liquid circuit system and the fifth valve body 405 constitutes the third liquid outlet of the liquid circuit system.

[0072] In this embodiment, the fourth branch 304 is connected to the first branch 301, and the fifth branch 305 is connected to the second branch 302. The fourth branch 304 is provided with a fourth valve body 404, through which the fluids of the first branch 301 and the second branch 302 can flow into the fourth branch 304 and then be discharged from the second outlet after passing through the fourth valve body 404. The fifth branch 305 is provided with a fifth valve body 405, through which the fluids of the first branch 301 and the second branch 302 can flow into the fifth branch 305 and then be discharged from the third outlet after passing through the fifth valve body 405.

[0073] Furthermore, the hydraulic system not only enables unified output after the confluence of two pumps via the third valve body 403, but also allows fluid from the first pump body 102 and / or the second pump body 202 to be directly output via independent fluid paths by selectively opening and closing the fourth valve body 404 and the fifth valve body 405. This provides additional configuration flexibility for parallel output, independent testing, or backup output for field pipeline connections. It increases the pumping device's adaptability to complex operating procedures and field piping requirements.

[0074] In one embodiment, the first pump body 102 is provided with a first liquid inlet 1021, and the second pump body 202 is provided with a second liquid inlet 2021. The first liquid inlet 1021 and the second liquid inlet 2021 are connected to an external supply device.

[0075] In this embodiment, the first pump body 102 is provided with a first liquid inlet 1021, and the second pump body 202 is provided with an independent second liquid inlet 2021. The first liquid inlet 1021 is connected to the supply pipeline of the liquid circuit system, and the second liquid inlet 2021 is connected to another supply pipeline of the liquid circuit system. Through this structural design, the two drive systems achieve parallel liquid supply from the same supply system at the liquid source, while maintaining the independence and controllability of the liquid inlet path. This ensures that the suction conditions of each pump are stable and do not interfere with each other when operating a single pump, operating two pumps in parallel, or switching operating modes, thus ensuring the continuity and reliability of pumping operations under all working conditions from the fluid supply level.

[0076] In one embodiment, the first drive system 1 and the second drive system 2 are arranged side by side or stacked.

[0077] In this embodiment, the first drive system 1 and the second drive system 2 are integrated as two independent power modules in the same pumping device. The first drive system 1, a unit consisting of an internal combustion engine, a gearbox, and a first pump body 102, and the second drive system 2, a unit consisting of an electric motor, a frequency converter, and a second pump body 202, can be arranged in one of two basic ways: one is to arrange them side by side in the horizontal direction, leaving space for maintenance and heat dissipation between them; the other is to stack them in the vertical direction, usually placing the relatively larger and heavier first drive system 1 on the lower layer and the second drive system 2 on the upper layer to optimize the overall space. The pumping device is usually equipped with a base, which has mounting holes, positioning pins, and fasteners that are compatible with the base frame of each system, and integrates a shared fuel tank, hydraulic oil tank, and a centralized wiring channel for cables and pipelines. This integrated design not only provides a solid installation foundation for the two drive systems and associated hydraulic valve groups, ensuring the overall rigidity and stability of the equipment during transportation and operation, but also significantly improves the space utilization efficiency of the device through the integrated layout, facilitating overall hoisting, transportation and rapid on-site placement.

[0078] According to an embodiment of the present invention, in a second aspect, a fracturing apparatus is provided, including the pumping device of the first aspect.

[0079] In this embodiment, since the fracturing equipment proposed in the second aspect includes the pumping device of the first aspect, the fracturing equipment has the same effect as the pumping device, and the specific technical effects of the pumping device will not be described in detail here.

[0080] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A pumping device, characterized in that, include: The first drive system (1) includes a first drive component (101) and a first pump body (102) connected by a drive. The second drive system (2) includes a second drive component (201) and a second pump body (202) connected by a drive. The maximum output power of the first drive component (101) is greater than or equal to the maximum output power of the second drive component (201). The output power of the second drive component (201) can be continuously adjusted. The liquid circuit system connects the first pump body (102) and the second pump body (202).

2. The pumping device according to claim 1, characterized in that, The first drive unit (101) has multiple gears, and the difference in output power between adjacent gears of the first drive unit (101) is less than or equal to the maximum output power of the second drive unit (201).

3. The pumping device according to claim 1 or 2, characterized in that, The hydraulic system includes a pipeline assembly (3) and a valve assembly (4). The pipeline assembly (3) includes a first branch (301), a second branch (302) and a third branch (303). The first branch (301) is connected to the first pump body (102), the second branch (302) is connected to the second pump body (202), and the first branch (301) and the second branch (302) intersect at the third branch (303). The valve assembly (4) includes a first valve body (401), a second valve body (402) and a third valve body (403). The first valve body (401) is located in the first branch (301), the second valve body (402) is located in the second branch (302), and the third valve body (403) is located in the third branch (303). The outlet of the third valve body (403) constitutes the first liquid outlet of the liquid circuit system.

4. The pumping device according to claim 3, characterized in that, In the first operating condition, the first drive system (1), the first valve body (401), and the third valve body (403) are activated; In the second operating condition, the second drive system (2), the second valve body (402), and the third valve body (403) are activated, while the first drive system (1) and the first valve body (401) are deactivated. In the third operating condition, the first drive system (1), the second drive system (2), and the valve assembly (4) are all activated.

5. The pumping device according to claim 1, characterized in that, The first drive system (1) further includes a transmission component (103), which is connected to the first drive component (101) and the first pump body (102). The transmission component (103) can adjust the output displacement of the first pump body (102) by gear.

6. The pumping device according to claim 1, characterized in that, The second drive system (2) further includes an adjustment element (203), which is connected to the second drive element (201) and can continuously adjust the output power of the second drive element (201).

7. The pumping device according to claim 3, characterized in that, The pipeline assembly (3) further includes a fourth branch (304) and a fifth branch (305), wherein the fourth branch (304) is connected to the first branch (301) and the fifth branch (305) is connected to the second branch (302); The valve assembly (4) further includes a fourth valve body (404) and a fifth valve body (405), the fourth valve body (404) being disposed in the fourth branch (304) and the fifth valve body (405) being disposed in the fifth branch (305). The fourth valve body (404) constitutes the second liquid outlet of the liquid circuit system, and the fifth valve body (405) constitutes the third liquid outlet of the liquid circuit system.

8. The pumping device according to claim 1, characterized in that, The first pump body (102) is provided with a first liquid inlet (1021), and the second pump body (202) is provided with a second liquid inlet (2021). The first liquid inlet (1021) and the second liquid inlet (2021) are connected to an external fluid supply device.

9. The pumping device according to claim 1, characterized in that, The first drive system (1) and the second drive system (2) are arranged side by side or stacked.

10. A fracturing device, characterized in that, The pumping device includes any one of claims 1 to 9.

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