Emulsion proportioning system

Abstract

The invention relates to the technical field of mining, and provides an emulsion proportioning system. The emulsion proportioning system comprises an oil tank, a water tank, a metering pump, a variable pump, a converging device and a driving device. An inlet of the metering pump is connected with the water tank to quantitatively output proportioning water, an inlet of the variable pump is connected with the oil tank to output emulsified oil by presetting the set displacement, and the converging device is connected with outlets of the double pumps to converge mixed oil and water. The driving device is provided with a first output shaft and a second output shaft which are in transmission connection with the metering pump and the variable pump respectively to achieve synchronous operation of the double pumps. Through the structural arrangement, the constant displacement pump and the variable displacement pump continuously and synchronously work, the problem of oil output interruption is solved from the source, and a stable oil-water ratio is formed; and the variable pump and the constant displacement pump are continuously and synchronously matched, so that the proportioning deviation caused by concentration detection delay and start-stop response lag is avoided. While the structure is simplified and the failure rate is reduced, the matching precision is locked from the power source level, so that the strict requirements of coal mine hydraulic supports and the like on the quality of emulsion are met.

Description

Technical Field

[0001] This invention relates to the field of mining technology, and more particularly to an emulsion proportioning system. Background Technology

[0002] As a core transmission and protection medium for hydraulic supports in coal mines and machining equipment, the accuracy of the oil-water ratio in emulsions directly affects the lubrication effect, rust prevention capability, and service life of the equipment. Too low a concentration can easily lead to wear and corrosion, while too high a concentration increases operating costs and reduces cooling performance. Therefore, precise control of the oil-water ratio is crucial for the application of emulsions.

[0003] In existing emulsion mixing systems, water pumps and oil pumps are generally driven by independent power sources, resulting in an inherent flaw in their mixing logic: to ensure continuous liquid supply, water pumps typically operate continuously, while oil pumps rely on concentration detection results for intermittent start-stop adjustments. For example, oil replenishment is initiated when the concentration is detected to be too low, and stops once the target concentration is reached. This method cannot achieve synchronous and continuous oil-water mixing: on the one hand, there are interruptions in oil output during pump start-stop operations, making it difficult to establish a stable ratio with the continuously flowing water, leading to significant fluctuations in the mixing concentration; on the other hand, intermittent oil replenishment is a reactive measure, easily causing concentration oscillations due to delayed concentration detection and lag in pump start-stop response, making it difficult to accurately pinpoint the target range. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides an emulsion proportioning system.

[0005] This invention provides an emulsion proportioning system, comprising: an oil tank for holding emulsified oil; a water tank for holding proportioning water; a metering pump, the inlet of which is connected to the water tank for metering the proportioning water; a variable pump, the inlet of which is connected to the oil tank for discharging emulsified oil at a preset set displacement; a confluence device connected to the outlet of the metering pump and the outlet of the variable pump; and a drive device having a first output shaft and a second output shaft, the first output shaft being connected to the metering pump and the second output shaft being connected to the variable pump.

[0006] According to an emulsion mixing system provided by the present invention, the mixing device includes: a static mixer, the inlet of which is connected to the outlet of the metering pump and the outlet of the variable pump; and an emulsion tank, which is connected to the outlet of the static mixer.

[0007] According to an emulsion mixing system provided by the present invention, the static mixer includes: a housing; and helical blades, wherein the helical blades are disposed inside the housing and together with the inner wall of the housing form a helical flow channel.

[0008] According to an emulsion proportioning system provided by the present invention, the emulsion proportioning system further includes: a concentration detection device, which is disposed downstream of the static mixer and is used to detect the concentration of the emulsion.

[0009] According to an emulsion mixing system provided by the present invention, the emulsion mixing system further includes: a control device, the control device being connected to the concentration detection device and the variable pump, and being used to control the discharge rate of the variable pump based on the detection result of the concentration detection device.

[0010] According to an emulsion mixing system provided by the present invention, the emulsion mixing system further includes: a first check valve disposed between the metering pump and the static mixer; and a second check valve disposed between the variable pump and the static mixer.

[0011] According to an emulsion mixing system provided by the present invention, the water tank is connected to a water supply source.

[0012] The emulsion mixing system further includes: a first liquid level sensor, which is installed in the water tank and used to detect the liquid level in the water tank; and a first control valve, which is installed between the water tank and the water supply source.

[0013] The control device is connected to the first liquid level sensor and the first control valve, and is used to control the working state of the first control valve based on the detection result of the first liquid level sensor.

[0014] According to an emulsion mixing system provided by the present invention, the emulsion mixing system further includes: an oil replenishment tank connected to the oil tank; and an oil replenishment pump connected between the oil replenishment tank and the oil tank.

[0015] According to an emulsion mixing system provided by the present invention, the emulsion mixing system further includes: a second liquid level sensor, the second liquid level sensor being disposed in the oil tank and used to detect the liquid level in the oil tank.

[0016] The control device is connected to the second liquid level sensor and the oil replenishment pump, and is used to control the working state of the oil replenishment pump based on the detection result of the second liquid level sensor.

[0017] According to an emulsion mixing system provided by the present invention, the emulsion mixing system further includes: a third liquid level sensor, the third liquid level sensor being disposed in the emulsion tank and used to detect the liquid level in the emulsion tank; and a second control valve, the second control valve being disposed between the static mixer and the emulsion tank.

[0018] The control device is connected to the third liquid level sensor and the second control valve, and is used to control the working state of the second control valve based on the detection result of the third liquid level sensor.

[0019] The emulsion proportioning system provided by this invention includes an oil tank for holding emulsified oil, a water tank for holding proportioning water, a metering pump for metering the proportioning water, a variable pump for outputting emulsified oil at a preset set discharge rate, a mixing device for combining the water output from the metering pump and the emulsified oil output from the variable pump, and a drive device for synchronously driving the metering pump and the variable pump. The inlet of the metering pump is connected to the water tank, and the inlet of the variable pump is connected to the oil tank. The mixing device is connected to the outlet of the metering pump and the outlet of the variable pump, respectively. The drive device is equipped with a first output shaft and a second output shaft, wherein the first output shaft is drivenly connected to the metering pump, and the second output shaft is drivenly connected to the variable pump. The dual output shafts of the drive device synchronously drive the metering pump and the variable pump, thereby achieving synchronous and continuous output of water and emulsified oil.

[0020] This structural design achieves several advantages. First, the drive unit synchronously drives the fixed-displacement pump and the variable-displacement pump via dual output shafts, ensuring they operate in sync and eliminating any gaps in oil output. This guarantees a continuous and stable output ratio between water and emulsified oil. Second, the variable-displacement pump continuously outputs emulsified oil at a preset displacement, complementing the fixed-displacement pump's metered water output. This avoids mixing deviations caused by delayed concentration detection and lag in pump start-stop response. Furthermore, the synchronous drive structure ensures the water-to-emulsified oil output ratio always matches the preset value, eliminating the need for complex correction components. This simplifies the system structure while locking in mixing accuracy at the power source level, meeting the stringent requirements for stable emulsion concentration in applications such as coal mine hydraulic supports and machining equipment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the system structure of the emulsion proportioning system provided by the present invention.

[0023] Reference numerals: 100, oil tank; 200, water tank; 310, metering pump; 320, variable pump; 330, drive unit; 410, static mixer; 420, emulsion tank; 500, concentration detection device; 600, control device; 710, first check valve; 720, second check valve; 810, first level sensor; 820, second level sensor; 830, third level sensor; 910, first control valve; 920, replenishment tank; 930, replenishment pump. Detailed Implementation

[0024] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0027] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate different embodiments or examples and features of different embodiments or examples described in this specification 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.

[0029] The following is combined with Figure 1 An emulsion proportioning system provided in an embodiment of the present invention will be described. It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute any particular limitation on the present invention.

[0030] Embodiments of the present invention provide an emulsion proportioning system, such as... Figure 1 As shown, it includes: an oil tank 100 for holding emulsified oil; a water tank 200 for holding proportioning water; a metering pump 310, the inlet of which is connected to the water tank 200 for metering the proportioning water; a variable pump 320, the inlet of which is connected to the oil tank 100 for outputting emulsified oil at a preset set displacement; a confluence device connected to the outlet of the metering pump 310 and the outlet of the variable pump 320; and a drive device 330 having a first output shaft and a second output shaft, the first output shaft being connected to the metering pump 310 and the second output shaft being connected to the variable pump 320.

[0031] In other words, the emulsion proportioning system provided by this invention includes an oil tank 100 for holding emulsified oil, a water tank 200 for holding proportioning water, a metering pump 310 for metering the proportioning water, a variable pump 320 for outputting emulsified oil at a preset set discharge rate, a mixing device for collecting and mixing the water output from the metering pump 310 and the emulsified oil output from the variable pump 320, and a drive device 330 for synchronously driving the metering pump 310 and the variable pump 320. The inlet of the metering pump 310 is connected to the water tank 200, and the inlet of the variable pump 320 is connected to the oil tank 100. The mixing device is connected to the outlet of the metering pump 310 and the outlet of the variable pump 320, respectively. The drive unit 330 is equipped with a first output shaft and a second output shaft. For example, the drive unit 330 is a dual-shaft motor, wherein the first output shaft is driven to the fixed displacement pump 310 and the second output shaft is driven to the variable displacement pump 320. The dual output shafts of the drive unit 330 synchronously drive the fixed displacement pump 310 and the variable displacement pump 320 to operate, thereby realizing the synchronous and continuous output of water and emulsified oil.

[0032] With this structural design, firstly, the drive unit 330 synchronously drives the fixed-displacement pump 310 and the variable-displacement pump 320 via dual output shafts, ensuring that the fixed-displacement pump 310 and the variable-displacement pump 320 always operate synchronously. This eliminates the problem of intermittent oil output from the source, allowing water and emulsified oil to form a continuous and stable output ratio. Secondly, the variable-displacement pump 320 continuously outputs emulsified oil at a preset displacement, which, combined with the metered water output from the fixed-displacement pump 310, avoids ratio deviations caused by concentration detection delays and pump start-stop response lags. Furthermore, the synchronous drive structure ensures that the output ratio of water and emulsified oil always matches the preset value, eliminating the need for additional complex correction components. While simplifying the system structure, it locks in the ratio accuracy at the power source level, meeting the stringent requirements for stable emulsion concentration in applications such as coal mine hydraulic supports and machining equipment.

[0033] In one embodiment of the present invention, the merging device includes: a static mixer 410, the inlet of which is connected to the outlet of a metering pump 310 and the outlet of a variable pump 320; and an emulsion tank 420, which is connected to the outlet of the static mixer 410.

[0034] The core function of the mixing unit is to receive the proportioning water continuously output by the metering pump 310 and the emulsified oil synchronously output by the variable pump 320. Through a non-powered mixing design, the oil and water are fully mixed, and the qualified emulsion is then stably stored for use by subsequent equipment. The static mixer 410 and emulsion tank 420 are detachably connected via a high-pressure sealed pipeline. The connection is sealed with fluororubber sealing rings to prevent leakage under complex downhole conditions, while also facilitating later maintenance and component replacement.

[0035] The static mixer 410, as a core component for non-powered mixing, is "static" specifically because it does not require additional active power devices such as motors or agitators. It relies entirely on the kinetic energy of the fluid itself, generated synchronously by the dual pumps, and achieves mixing through the flow channel structure that guides fluid collision, division, and rotation. For example, the shell of the static mixer 410 is integrally formed from 304 stainless steel, with a length 8-12 times its inner diameter. Flange interfaces are located at both ends, which are bolted to the outlet pipes of the metering pump 310 and the variable pump 320, and the inlet pipe of the emulsion tank 420, respectively. The inner wall of the shell is precision polished to reduce fluid flow resistance and prevent impurities from causing a decrease in mixing efficiency, making it suitable for the harsh working conditions of coal mines containing dust and small amounts of particulate matter. Multiple sets of staggered helical blades are fixedly arranged along the axial direction within the shell cavity. Each set of helical blades includes two symmetrically arranged left-handed and right-handed blades. The blades are made of the same material as the shell and are fixed to the inner wall of the shell by laser welding, ensuring they do not detach under long-term high-pressure fluid impact. The pitch of the helical blades is 1.5-2 times the inner diameter of the casing, and the lead is designed to be 100-200 mm according to the fluid velocity. The installation angles of adjacent sets of helical blades differ by 180°, so that the blades and the inner wall of the casing together form a continuous and interconnected helical flow channel. The blade thickness is -5 mm, and the edges are rounded to ensure structural strength and guide the fluid to a smooth direction, avoiding mixing dead zones caused by local eddies.

[0036] Water from the fixed displacement pump 310 and emulsified oil from the variable displacement pump 320 enter the inlet of the static mixer 410 at a stable flow rate under the synchronous drive of a dual-shaft motor. They are first separated into two streams by the first set of spiral blades and propel along the spiral channel. During propulsion, the two streams generate centrifugal force due to changes in the channel curvature, colliding and shearing with each other to initially form an oil-water mixture. The mixture then enters the next set of staggered spiral blades, where it is again separated and redirected, creating numerous tiny vortices within the fluid, further breaking down the emulsified oil droplets into even smaller particles. Through the continuous action of multiple sets of spiral blades, the oil and water phases achieve thorough homogeneous mixing without additional power, forming a stable oil-in-water emulsion, which finally flows out from the outlet of the static mixer 410.

[0037] The emulsion tank 420 can be welded from Q235B steel plate, with an epoxy resin anti-corrosion coating on the inner wall. The coating thickness is ≥0.5mm to prevent rust caused by long-term storage of emulsion and extend its service life. The capacity of the emulsion tank 420 is designed to be 1-5m³ / h depending on the system's mixing flow rate. 3The top of the tank is equipped with a flange interface that matches the outlet pipeline of the static mixer 410, and the bottom is equipped with an inclined drain port with an inclination angle of ≥15° to facilitate the periodic discharge of impurities deposited at the bottom of the tank. The side of the tank is equipped with a transparent observation window and liquid level scale lines, which can be used to visually observe the amount of emulsion stored. The top of the tank is also equipped with a breather valve to balance the air pressure inside and outside the tank and prevent the tank from deforming due to the inflow and outflow of emulsion.

[0038] The connecting pipeline between the emulsion tank 420 and the static mixer 410 uses a high-pressure rubber hose with a working pressure ≥20MPa. It features an inner steel wire reinforcement layer and an outer wear-resistant and oil-resistant protective layer, making it suitable for downhole applications involving frequent movement and friction. Both ends of the pipeline are connected to flange interfaces via quick-connect couplings for easy and rapid disassembly and replacement.

[0039] This structural design, through a spiral flow channel, guides the fluid to achieve multiple divisions, collisions, and rotations. This breaks down emulsified oil droplets into tiny sizes without the need for an additional power unit, significantly improving mixing uniformity and effectively avoiding inaccurate concentration detection caused by oil-water stratification. This provides a stable foundation for subsequent concentration fine-tuning. Furthermore, the static mixer 410 relies on the fluid's own kinetic energy for mixing, perfectly matching the synchronous output characteristics of the dual-pump driven by a dual-shaft motor. The stable flow rate of the dual pumps provides continuous and uniform kinetic energy for mixing, and the mixing efficiency increases synchronously with the flow rate, avoiding mixing fluctuations caused by mismatch between the power unit and the fluid flow rate. Simultaneously, the absence of additional power components reduces the number of vulnerable parts such as motors and agitators, greatly lowering the failure rate. The shell and spiral blades are made of high-strength materials and feature a sealing design, making them resistant to high pressure, wear, and corrosion, suitable for the harsh working conditions of humid, dusty, and high-pressure environments in coal mines, extending their service life. In addition, the modular design facilitates on-site assembly and disassembly, and the spiral blades are welded for fixation, eliminating the need for frequent maintenance. The observation window and drain port of the emulsion tank 420 reduce daily maintenance workload and minimize downtime.

[0040] In one embodiment of the present invention, the emulsion mixing system further includes a concentration detection device 500, which is disposed downstream of the static mixer 410 and is used to detect the concentration of the emulsion.

[0041] Furthermore, in one embodiment of the present invention, the emulsion mixing system further includes a control device 600, which is connected to the concentration detection device 500 and the variable pump 320, and is used to control the discharge rate of the variable pump 320 based on the detection result of the concentration detection device 500.

[0042] In other words, the concentration detection device 500 and the control device 600 form a closed-loop feedback system: relying on the synchronous drive characteristics of the dual output shafts of the drive device 330, the metering pump 310 and the variable pump 320 have completed the initial displacement setting according to the preset ratio. The concentration detection device 500 monitors the concentration of the emulsion after mixing in real time, and the control device 600 only makes precise fine adjustments for small concentration deviations without changing the general direction of the initial ratio, thus ensuring a balance between ratio stability and response speed.

[0043] For example, the concentration detection device 500 uses an online capacitive concentration sensor that can withstand the harsh working conditions of a coal mine, including humidity, dust, and vibration. The concentration sensor is installed on the pipeline between the outlet of the static mixer 410 and the inlet of the emulsion tank 420. The concentration sensor is fixed to the pipeline via a flange connection, and its probe extends into the pipeline to a depth of half the inner diameter of the pipeline, perpendicular to the fluid flow direction, ensuring full contact between the probe and the fluid, and making the detection data representative. The surface of the concentration sensor probe is coated with a wear-resistant polytetrafluoroethylene coating to reduce wear on the probe from tiny particles in the emulsion; the concentration sensor and the control device 600 are connected by a shielded cable, with the cable sheathed in a stainless steel protective tube to avoid signal distortion caused by electromagnetic interference.

[0044] The control device 600 uses a mining-grade explosion-proof PLC controller. The controller housing is welded from Q235 steel plate, with an anti-static and anti-corrosion coating, and an internal cooling fan to ensure stable continuous operation. The controller also integrates a touch screen display, which can display parameters such as target concentration, current concentration, and real-time discharge of the variable pump 320 in real time, and supports manual correction of the target concentration.

[0045] After system startup, the drive unit 330 synchronously drives the fixed displacement pump 310 and the variable displacement pump 320 to operate at the initially set displacement. Oil and water are mixed by the static mixer 410 and then flow to the emulsion tank 420. The concentration sensor collects emulsion concentration data in real time and transmits it to the control unit 600 for processing. The control unit 600 compares the detected concentration with the target concentration to determine if fine-tuning is needed: if the deviation is within the allowable range, the status quo is maintained, and the data is displayed in real time on the touch screen; if there is a slight deviation, PID fine-tuning is initiated, and a control signal is output to adjust the displacement of the variable displacement pump 320; if the deviation is too large, an alarm is triggered, prompting manual troubleshooting. After receiving the control signal, the variable displacement pump 320 adjusts the plunger stroke through its internal electro-hydraulic proportional valve to achieve a slight displacement correction. The corrected oil mixes synchronously with the water output by the fixed displacement pump 310, and the concentration quickly returns to the target range.

[0046] Therefore, relying on the core logic of "initial ratio locking in the general direction + precise correction of minor deviations", the system ensures that the emulsion concentration always stays within the target range, completely solving the concentration oscillation problem caused by the "large-scale post-correction" of existing technologies, and fully meeting the stringent requirements of hydraulic equipment for the stability of emulsion concentration; fine-tuning is only performed on small deviations, which greatly reduces the mechanical wear caused by frequent and large changes in the displacement of the variable pump 320, and extends the service life of the pump body.

[0047] In one embodiment of the present invention, the emulsion mixing system further includes: a first check valve 710, which is disposed between the metering pump 310 and the static mixer 410; and a second check valve 720, which is disposed between the variable pump 320 and the static mixer 410.

[0048] By setting the first check valve 710 and the second check valve 720, the water output from the fixed displacement pump 310 and the emulsified oil output from the variable displacement pump 320 can be effectively prevented from flowing back into the pipeline. This avoids the backflow from disrupting the oil-water ratio output by the two pumps synchronously, ensuring that the ratio locked at the power source level is stable and without deviation. At the same time, it prevents the mixed fluid from flowing back into the pump body or unmixed pipeline, avoiding fluid turbulence from affecting the mixing effect of the static mixer 410 and ensuring the uniformity of emulsion mixing. It can also reduce the impact and wear of backflow on the internal components of the pump body, reduce the risk of pump failure, and extend the service life of the equipment. Moreover, the check valve has a simple structure and high reliability, and can be adapted to harsh downhole working conditions without additional maintenance. It works synergistically with the core structures such as dual pump synchronous drive and static mixing, further enhancing the operational stability and ratio accuracy of the entire ratio system.

[0049] In one embodiment of the present invention, the water tank 200 is connected to a water supply source.

[0050] The emulsion mixing system also includes: a first liquid level sensor 810, which is installed in the water tank 200 and used to detect the liquid level in the water tank 200; and a first control valve 910, which is installed between the water tank 200 and the water supply source.

[0051] The control device 600 is connected to the first liquid level sensor 810 and the first control valve 910, and is used to control the working state of the first control valve 910 based on the detection result of the first liquid level sensor 810.

[0052] Furthermore, in one embodiment of the present invention, the emulsion mixing system further includes: an oil replenishment tank 920 connected to an oil tank 100; and an oil replenishment pump 930 connected between the oil replenishment tank 920 and the oil tank 100.

[0053] In one embodiment of the present invention, the emulsion mixing system further includes a second liquid level sensor 820, which is disposed in the oil tank 100 and used to detect the liquid level in the oil tank 100.

[0054] The control device 600 is connected to the second liquid level sensor 820 and the replenishment pump 930, and is used to control the working state of the replenishment pump 930 based on the detection result of the second liquid level sensor 820.

[0055] In another embodiment of the present invention, the emulsion mixing system further includes: a third liquid level sensor 830, which is disposed in the emulsion tank 420 and used to detect the liquid level in the emulsion tank 420; and a second control valve, which is disposed between the static mixer 410 and the emulsion tank 420.

[0056] The control device 600 is connected to the third liquid level sensor 830 and the second control valve, and is used to control the working state of the second control valve based on the detection result of the third liquid level sensor 830.

[0057] Specifically, a first liquid level sensor 810 is installed inside the water tank 200. The sensor adopts a non-contact design and is installed on the upper inner side of the water tank 200 to avoid corrosion or contamination caused by direct contact with the water. At the same time, it ensures that the detection range covers the low liquid level warning value and the high liquid level upper limit value of the water tank 200. The water tank 200 is connected to an external water supply source through a sealed pipeline. A first control valve 910 is connected in series in the pipeline. This valve is a high-pressure resistant and corrosion-resistant electric shut-off valve. Its opening and closing action is precisely controlled by the control device 600. The connection between the valve body and the pipeline adopts a double sealing structure to prevent leakage under high pressure conditions. When the liquid level drops to the preset low liquid level warning value, the control device 600 determines that the water tank 200 is short of water and immediately sends an opening command to the first control valve 910, so that the water supply source replenishes water to the water tank 200 through the pipeline; when the liquid level rises to the preset high liquid level upper limit value, the sensor feedback signal triggers the control device 600, which commands the first control valve 910 to close and stop water replenishment, thereby maintaining the liquid level of the water tank 200 in a stable range that is compatible with the continuous pumping of the metering pump 310, avoiding damage to the metering pump 310 due to water shortage, or waste and safety hazards caused by water overflow.

[0058] To ensure a continuous and stable supply of emulsified oil to the variable pump 320, the system is equipped with an oil replenishment tank 920 and an oil replenishment pump 930, forming an automatic oil replenishment link for the oil tank 100. The oil replenishment tank 920 features a sealed structure with a dust cover and filler port on top. The inner wall of the tank is coated with an oil-resistant and corrosion-resistant coating to prevent oxidation and deterioration of the emulsified oil or external contamination. The oil replenishment pump 930 is a self-priming oil-resistant pump, adapted to the viscosity characteristics of emulsified oil, and can quickly establish oil supply pressure. Its inlet is connected to the bottom of the oil replenishment tank 920 via a sealed pipeline, and its outlet is connected to the top of the oil tank 100 via a high-pressure oil-resistant pipeline. The pipeline is wrapped with a wear-resistant protective layer. A second liquid level sensor 820 is installed inside the oil tank 100, with its installation position corresponding to the low liquid level replenishment threshold and normal liquid level threshold of the oil tank 100. The sensor adopts an oil-proof encapsulation design to ensure detection accuracy and service life under long-term immersion in emulsified oil. When the oil level in tank 100 falls below the low-level replenishment threshold, the sensor sends a replenishment signal to the control device 600. The control device 600 immediately starts the replenishment pump 930, which meterly delivers the emulsified oil from the replenishment tank 920 to tank 100. When the oil level in tank 100 rises to the normal level threshold, the sensor sends a feedback signal, and the control device 600 instructs the replenishment pump 930 to stop working, completing the automatic replenishment process.

[0059] A third liquid level sensor 830 is installed inside the emulsion tank 420, corresponding to the high liquid level stop threshold, normal operation threshold, and low liquid level start threshold, respectively. The third liquid level sensor 830 is installed on the inner side of the tank and fixed by a bracket. A second control valve is connected in series in the connecting pipeline between the static mixer 410 and the emulsion tank 420. This valve adopts an electrically adjustable structure and features high pressure resistance, leak prevention, and rapid switching response. It can adjust the on / off state in real time according to the liquid level signal. The third liquid level sensor 830 and the second control valve are both connected to the control device 600. When the liquid level in the emulsion tank 420 rises to the high liquid level stop threshold, the control device 600 determines that the storage is saturated, immediately instructs the second control valve to close, and simultaneously sends a pause signal to the dual-pump synchronous drive system to avoid waste and safety risks caused by the overflow of finished emulsion. When the liquid level drops to the low liquid level start threshold, the control device 600 instructs the second control valve to open and triggers the core proportioning system to run preferentially, accelerating the replenishment of finished emulsion. When the liquid level is within the normal operating threshold range, the second control valve remains open, and the core proportioning system operates at the normal rhythm to ensure continuous liquid supply to the hydraulic equipment.

[0060] Through the closed-loop linkage of the liquid level detection and control valves of water tank 200, oil tank 100, emulsion tank 420, and oil replenishment pump 930, automatic replenishment of water and emulsion oil and dynamic storage protection of finished emulsion are realized. This completely avoids the problems of pump idling damage and proportioning stagnation caused by raw material shortage. At the same time, it effectively prevents waste and safety hazards caused by fluid overflow, and ensures the continuous and stable operation of the proportioning system under complex downhole conditions.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An emulsion proportioning system, characterized in that, include: An oil tank (100) for holding emulsified oil; Water tank (200), the water tank (200) is used to hold water for proportioning; A metering pump (310) is provided, the inlet of which is connected to the water tank (200) for metering out proportioned water. A variable pump (320), the inlet of which is connected to the oil tank (100), is used to output emulsified oil at a preset set displacement. A confluence device is connected to the outlet of the metering pump (310) and the outlet of the variable pump (320); The drive device (330) has a first output shaft and a second output shaft, the first output shaft being connected to the metering pump (310) and the second output shaft being connected to the variable pump (320).

2. The emulsion proportioning system according to claim 1, characterized in that, The merging device includes: A static mixer (410) is provided, the inlet of which is connected to the outlet of the metering pump (310) and the outlet of the variable pump (320). An emulsion tank (420) is connected to the outlet of the static mixer (410).

3. The emulsion proportioning system according to claim 2, characterized in that, The static mixer (410) includes: case; The spiral blades are disposed inside the housing and together with the inner wall of the housing, form a spiral flow channel.

4. The emulsion proportioning system according to claim 2, characterized in that, The emulsion mixing system also includes: A concentration detection device (500) is provided downstream of the static mixer (410) and is used to detect the concentration of the emulsion.

5. The emulsion proportioning system according to claim 4, characterized in that, The emulsion proportioning system also includes: A control device (600) is connected to the concentration detection device (500) and the variable pump (320) and is used to control the discharge rate of the variable pump (320) based on the detection result of the concentration detection device (500).

6. The emulsion proportioning system according to claim 2, characterized in that, The emulsion mixing system also includes: A first check valve (710) is disposed between the metering pump (310) and the static mixer (410); A second check valve (720) is disposed between the variable pump (320) and the static mixer (410).

7. The emulsion proportioning system according to claim 5, characterized in that, The water tank (200) is connected to the water supply source; The emulsion proportioning system also includes: A first liquid level sensor (810) is disposed in the water tank (200) and is used to detect the liquid level in the water tank (200); A first control valve (910) is disposed between the water tank (200) and the water supply source; The control device (600) is connected to the first liquid level sensor (810) and the first control valve (910), and is used to control the working state of the first control valve (910) based on the detection result of the first liquid level sensor (810).

8. The emulsion proportioning system according to claim 7, characterized in that, The emulsion proportioning system also includes: A refueling tank (920) is connected to the fuel tank (100); A replenishing pump (930) is connected between the replenishing tank (920) and the oil tank (100).

9. The emulsion proportioning system according to claim 8, characterized in that, The emulsion proportioning system also includes: A second liquid level sensor (820) is disposed in the oil tank (100) and is used to detect the liquid level in the oil tank (100); The control device (600) is connected to the second liquid level sensor (820) and the oil replenishment pump (930), and is used to control the working state of the oil replenishment pump (930) based on the detection result of the second liquid level sensor (820).

10. The emulsion proportioning system according to any one of claims 2 to 9, characterized in that, The emulsion proportioning system also includes: A third liquid level sensor (830) is disposed in the emulsion tank (420) and is used to detect the liquid level in the emulsion tank (420); A second control valve is disposed between the static mixer (410) and the emulsion tank (420); The control device (600) is connected to the third liquid level sensor (830) and the second control valve, and is used to control the working state of the second control valve based on the detection result of the third liquid level sensor (830).

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