An intelligent circulation system for underground frozen hole drilling mud

Abstract

The present invention discloses an intelligent circulation system for underground frozen hole drilling mud, which belongs to the technical field of mud recycling. It includes a pulping system, and the bottom of the pulping system is fixedly connected to a base frame. The present application integrates pulping, pumping and filtering and recycling into one system through modular design. The pulping is completed by quantitative batching, automatic stirring and real-time monitoring of the slurry ratio through the pulping system. After the grouting circulation through the pumping system, the slurry with drilling debris is recovered to the filtering and recycling system, filtered in the filtering and recycling system, and the discharged slag is collected in a metering bucket and compared with the drilling footage volume to judge whether the mud pressure is balanced with the formation pressure, and a pressurization or decompression signal is given. After the slurry is collected, it is injected into the pulping system again to complete the circulation. The mud pressure and efficient filtration and recovery cycle can be controlled by adjusting the mud performance in real time. In addition, an intelligent monitoring system is provided to monitor each module in real time to achieve the construction goals of intelligent, efficient, green and safe.

Description

Technical Field

[0001] The present invention relates to the technical field of mud recycling, and more particularly to an intelligent mud circulation system for drilling underground freezing holes. Background Art

[0002] With the accelerated development of urban underground space, the geotechnical environment faced by projects like subway tunnels and deep foundation pits is becoming increasingly complex, significantly increasing the construction risks associated with water-rich, soft, and unstable strata. Artificial freezing, due to its strong adaptability, excellent water-repellent properties, high frozen soil strength, and environmental friendliness, has become widely used to address engineering challenges in water-rich, soft strata.

[0003] In actual production operations, freeze hole drilling is a key step in the freeze method. The drilling mud circulation system carries cuttings and debris, balances ground pressure, cools and lubricates the drill bit and drill rod, and improves drilling efficiency. Currently, freeze hole drilling mud circulation for urban tunnels or underground projects in China is primarily manual, requiring the installation of a slurry storage tank, grouting pumps, and a mud deslagging sedimentation tank on the construction workbench. The construction process has the following problems: 1. The working environment of the construction platform is crowded and messy, the ground mud is seriously contaminated, the labor intensity is high, and there are safety hazards; 2. The decentralized mud circulation system, slurry making, and slag removal require many operators, and the quality is difficult to guarantee; 3. The existing construction method only uses orifice valves to control the mud pressure, and the pressure is controlled according to construction experience, which will inevitably cause the mud pressure maintenance parameters in the hole to be unscientific and cannot effectively balance the formation pressure; 4. At the same time, the mud is less efficient during the filtration process, which will increase the working processing time of the overall equipment and reduce the processing efficiency; 5. When the mud is placed in the slurry storage barrel and stirred and then output, a lot of mud will accumulate on the inner wall of the slurry storage barrel. Long-term accumulation will reduce the storage space in the slurry storage barrel, requiring operators to repeatedly clean it, increasing the workload of operators. Summary of the Invention

[0004] In response to the problems in the prior art of crowded and messy working environment of construction platforms, scattered mud circulation systems, large number of operators required for slurry making and slag removal, and inability to effectively balance formation pressure, the purpose of the present invention is to propose an intelligent circulation system for underground freezing hole drilling mud. Through modular design, this system integrates slurry making, pumping and filtration and recovery into one system, realizing real-time adjustment of mud performance, controllable mud pressure, and efficient filtration and recovery. In addition, an intelligent monitoring system is set up to monitor each module in real time, achieving the goal of intelligent, efficient, green and safe construction.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] An intelligent circulation system for underground frozen hole drilling mud includes a slurry making system, the bottom of which is fixedly connected to a base frame, the slurry making system including a mixing slurry storage barrel, a water adding assembly, a batching assembly, and a longitudinal mixer, the longitudinal mixer being partially disposed in the mixing slurry storage barrel to stir the mud, the water adding assembly and the batching assembly being disposed on the top of the mixing slurry storage barrel, the water adding assembly and the batching assembly cooperating to adjust the mud mixing ratio, and the mixing slurry storage barrel being further provided with a slurry storage monitoring assembly to monitor the mud volume, weight, and viscosity in real time;

[0007] A pumping system, wherein the pumping system is connected to the mixing and slurry storage barrel through a slurry discharge pipe;

[0008] A filtration and recovery system, the filtration and recovery system comprising a slurry collecting barrel, a slurry vibrating screen being transversely arranged in the slurry collecting barrel and dividing the slurry collecting barrel into an upper cavity and a lower cavity, a slurry return pipe being arranged on one side of the slurry collecting barrel, the slurry return pipe being in communication with the upper cavity, a slag discharge port being arranged on one side of the upper cavity, the lower cavity being in communication with the agitating slurry storage barrel through a slurry feeding pipe so that qualified slurry filtered by the slurry vibrating screen can flow back to the agitating slurry storage barrel, a slurry collection monitoring component being arranged in the slurry collecting barrel to monitor the slurry volume, weight and viscosity in real time;

[0009] An intelligent monitoring system is connected to the pulping system, pumping system, and filtration recovery system respectively. The intelligent monitoring system is a PLC intelligent control cabinet. The intelligent monitoring system monitors mud circulation information in real time and intelligently controls the working status of the mud circulation system.

[0010] Optionally, the water adding component includes a water adding pipe and a first electromagnetic flow valve arranged on the water adding pipe, the material mixing component includes multiple material mixing funnels, and a weighing valve is arranged at the bottom of each material mixing funnel to weigh the material weight. The intelligent monitoring system is connected to the first electromagnetic flow valve and the weighing valve to obtain the amount of water added, the amount of material added and to adjust the mud mixing ratio.

[0011] Optionally, the slurry storage monitoring component includes an online slurry storage viscometer, a slurry storage level meter, and a slurry storage weighing module. The online slurry storage viscometer and the slurry storage level meter are arranged in the inner cavity of the stirring slurry storage barrel, and the slurry storage weighing module is arranged at the outer bottom of the stirring slurry storage barrel. A slurry outlet is fixedly connected to one side of the stirring slurry storage barrel. The intelligent monitoring system is connected to the slurry storage monitoring component to monitor the slurry volume, weight and viscosity in the slurry making system in real time.

[0012] Optionally, both sides of the longitudinal mixer are fixedly connected with side fixing frames, the bottom of the side fixing frames is fixedly connected to the top of the mixing slurry storage barrel, the output shaft of the longitudinal mixer is fixedly connected with a bottom transmission rod, the surface of the bottom transmission rod is fixedly connected with a side stirring rod, both sides of the bottom transmission rod are fixedly connected with an inner transmission frame, both sides of the inner transmission frame are fixedly connected with an inner scraper, the inner side of the side fixing frame is fixedly connected with an L fixing frame, one side of the L fixing frame is fixedly connected with a side limit frame, the surface of the side limit frame is provided with an inner limit hole, and the inner side of the inner limit hole is movably connected with an inner bearing slide rod.

[0013] Optionally, the pumping system includes a grouting pump and a drilling rig, the inlet of the grouting pump is connected to the slurry outlet pipe, the mixing slurry storage barrel is connected through the slurry outlet pipe, the outlet of the grouting pump is connected to the slurry delivery pipe, one side of the drilling rig is connected to the slurry delivery pipe, and the slurry collecting barrel is connected through the slurry return pipe.

[0014] Optionally, a slurry delivery pressure gauge and a slurry delivery flow meter are provided on the slurry delivery pipe, and the intelligent monitoring system is connected to the slurry delivery pressure gauge and the slurry delivery flow meter to regulate the slurry pressure of grouting and slurry return in real time.

[0015] Optionally, the surface of the bottom transmission rod is fixedly connected with a bottom transmission bevel gear, one side of the bottom transmission bevel gear is meshedly connected with a side transmission bevel gear, one side of the side transmission bevel gear is fixedly connected with a side transmission rod, the surface of the side transmission rod is movably sleeved with a top limit frame, the bottom of the top limit frame is fixedly connected with a bottom support rod, both sides of the bottom support rod are fixedly connected with a bottom support plate, one end of the side transmission rod is fixedly connected with a side connection bevel gear, and the bottom of the side connection bevel gear is meshedly connected with the bottom connection bevel gear.

[0016] Optionally, the slurry collection monitoring component includes a slurry collection level meter, a slurry collection online viscometer, and a slurry collection weighing module arranged at the bottom outside the slurry collection barrel. The intelligent monitoring system is connected to the slurry collection monitoring component to monitor the slurry volume, weight and viscosity in the filtration recovery system in real time.

[0017] Optionally, the grouting pipe is powered by a grouting pump, a second electromagnetic flow valve is provided on the grouting pipe, and both the grouting pump and the second electromagnetic flow valve are connected to the intelligent monitoring system to regulate the grouting flow in real time.

[0018] Optionally, the mud vibrating screen is an electric filter screen, which includes a motor and a multi-layer screen, and is driven by a motor to achieve vibration of the multi-layer screen, the bottom of the bottom connecting bevel teeth is fixedly connected to a bottom movable gear disc, the bottom of the bottom movable gear disc is movably connected to a bottom bearing disc, the bottom of the bottom bearing disc is movably connected to a support column, one side of the bottom movable gear disc is meshedly connected to a side movable gear disc, the bottom of the side movable gear disc is fixedly connected to an arc-shaped connecting plate, the bottom of the arc-shaped connecting plate is fixedly connected to a bottom connecting ring, both sides of the bottom connecting ring are fixedly connected to bottom stirring rods, and the bottom of the bottom stirring rod is movably connected to a bottom dividing rod.

[0019] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0020] In the above scheme, slurrying, pumping and filtration recovery are integrated into one system through modular design. Slurrying is completed by quantitative proportioning, automatic stirring and real-time monitoring of slurry ratio through the slurrying system. After the grouting circulation through the pumping system, the slurry with drilling cuttings is recovered to the filtration recovery system, filtered in the filtration recovery system, and the discharged slag is collected in the metering bucket and compared with the drilling footage volume to judge whether the mud pressure and formation pressure are balanced, and a pressurization or decompression signal is given. After the slurry is collected, it is injected into the slurrying system again to complete the cycle. This system realizes real-time adjustment of mud performance, controllable mud pressure, and efficient filtration recovery cycle, and also sets an intelligent monitoring system to monitor each module in real time, so as to achieve the construction goals of intelligent, efficient, green and safe.

[0021] After adding water into the mixing and slurry storage barrel through the water adding assembly, the slurry is mixed evenly by stirring with the side stirring rod, and in the process of the side stirring rod rotating and mixing, the rotation of the bottom transmission rod will synchronously drive the rotation of the inner transmission frame, and the rotation of the inner transmission frame will simultaneously drive the inner scraper to rotate synchronously. The inner scraper moves along the inner wall of the mixing and slurry storage barrel, and the slurry adhering to the inner wall of the mixing and slurry storage barrel can be scraped off, thereby improving the discharging effect of the mixing and slurry storage barrel, reducing the accumulation of slurry on the inner wall of the mixing and slurry storage barrel, and reducing the cleaning workload of the operator.

[0022] The rotating side transmission rod will drive the side connecting bevel gear to rotate synchronously. The rotation direction can be changed through the engagement of the side connecting bevel gear and the bottom connecting bevel gear, and the bottom stirring rod can be driven to rotate through the side connecting bevel gear. The force is transmitted through a portable device, and the side stirring rod can be rotated to stir the mud while the bottom stirring rod can be driven to rotate to separate the mud. No additional driving force is required, which improves energy utilization.

[0023] The mud containing sand and gravel circulates from the return slurry pipe to the slurry collecting barrel. After the vibration of the electric filter screen, the sand and gravel are retained in the upper cavity and discharged through the slag discharge port. The qualified slurry after filtration is collected in the lower cavity and returned to the mixing and slurry storage barrel through the slurry feeding pipe. At the same time, the bottom movable gear disc is driven to rotate by the rotation of the bottom connecting bevel teeth. The engagement of the bottom movable gear disc with the side movable gear disc can synchronously drive the side movable gear disc to rotate when the bottom movable gear disc rotates. The rotating side movable gear disc will drive the arc-shaped connecting plate to rotate, and the two arc-shaped connecting plates will move along the outside of the slurry feeding pipe and drive the bottom connecting ring to rotate. When the bottom connecting ring rotates, it will drive the bottom stirring rod to rotate. The rotating bottom stirring rod will drive multiple bottom dividing rods to move along the screen surface of the electric filter screen, which can increase the screening speed of the mud material on the surface of the electric filter screen and improve the working efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0025] Figure 1 The overall appearance front view provided by the present invention;

[0026] Figure 2 A top view of the overall appearance provided by the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the stirring slurry storage barrel of the present invention;

[0028] Figure 4 This is a schematic diagram of the slurry collecting barrel structure of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the inner transmission frame of the present invention;

[0030] Figure 6 This is a schematic diagram of the side limit frame structure of the present invention;

[0031] Figure 7 It is a schematic diagram of the side transmission rod structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the arc-shaped connecting plate of the present invention;

[0033] Figure 9 It is a schematic diagram of the structure of the arc-shaped connecting plate of the present invention.

[0034] [Reference Signs]

[0035] 100, pulping system; 110, mixing and storage barrel; 111, pulp outlet; 120, water adding assembly; 121, first electromagnetic flow valve; 130, batching assembly; 140, vertical mixer; 150, online viscosity meter for storage; 160, level gauge for storage; 170, weighing module for storage; 200, pumping system; 210, grouting pump; 220, drilling rig; 230, pulp outlet pipe; 240, pulp delivery pipe; 241, pulp delivery pressure gauge; 242, pulp delivery flow meter; 250, return pulp pipe; 251, return pulp flow meter; 252, return pulp pressure regulating valve; 300, filtration and recovery system; 310, pulp collecting barrel; 311, slurry vibrating screen; 312, slag discharge port; 320, pulp collection level gauge; 330, online viscosity meter for collection; 340, pulp collection weighing module; 350, Grouting pipe; 351, second electromagnetic flow valve; 400, intelligent monitoring system; 500, base frame; 601, side fixing frame; 602, bottom transmission rod; 603, side stirring rod; 604, inner transmission frame; 605, inner scraper; 606, side limit frame; 607, L fixing frame; 608, inner limit hole; 609, inner bearing slide; 701, bottom transmission bevel gear; 702, side transmission bevel gear; 703, side transmission rod; 704, side connecting bevel gear; 705, bottom connecting bevel gear; 706, top limit frame; 707, bottom support rod; 708, bottom support plate; 801, bottom movable gear disc; 802, bottom bearing disc; 803, support column; 804, side movable gear disc; 805, arc-shaped connecting plate; 806, bottom connecting ring; 807, bottom stirring rod; 808, bottom dividing rod.

[0036] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0037] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative methods for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0038] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0039] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0040] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0041] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0042] like Figures 1 to 9As shown, an embodiment of the present invention provides an intelligent circulation system for underground freezing hole drilling mud, including a slurry making system 100, the bottom of the slurry making system 100 is fixedly connected to a base frame 500, the slurry making system 100 includes a mixing slurry storage barrel 110, a water adding component 120, a batching component 130 and a longitudinal mixer 140, the longitudinal mixer 140 is partially arranged in the mixing slurry storage barrel 110 to stir the mud, the water adding component 120 and the batching component 130 are arranged on the top of the mixing slurry storage barrel 110, the water adding component 120 and the batching component 130 cooperate to adjust the mud mixing ratio, and the mixing slurry storage barrel 110 is also provided with a slurry storage monitoring component to monitor the mud volume, weight and viscosity in real time;

[0043] The pumping system 200, the slurry delivery pipe 240 is connected to the slurry discharge pipe 230 through the grouting pump 210, one end of the slurry discharge pipe 230 is connected to one side of the mixing slurry storage barrel 110, and the slurry return pipe 250 is connected to the filtration recovery system 300;

[0044] The filtering and recovery system 300 includes a slurry collecting barrel 310, a slurry vibrating screen 311 is transversely arranged in the slurry collecting barrel 310, and the slurry collecting barrel 310 is divided into an upper cavity and a lower cavity. A slurry return pipe 250 is provided on one side of the slurry collecting barrel 310, and the slurry return pipe 250 is connected to the upper cavity. A slag discharge port 312 is provided on one side of the upper cavity. The lower cavity is connected to the mixing and slurry storage barrel 110 through a slurry feeding pipe 350 so that the qualified slurry filtered by the slurry vibrating screen 311 can flow back to the mixing and slurry storage barrel 110. A slurry collection monitoring component is provided in the slurry collecting barrel 310 to monitor the slurry volume, weight and viscosity in real time.

[0045] The intelligent monitoring system 400 is connected to the pulping system 100, the pumping system 200, and the filtration recovery system 300 respectively. The intelligent monitoring system 400 is a PLC intelligent control cabinet. The intelligent monitoring system 400 monitors the mud circulation information in real time and intelligently controls the working status of the mud circulation system.

[0046] In this embodiment: the pulping system 100, the pumping system 200 and the filtration recovery system 300 are all directly fixed on the base frame 500, and the intelligent monitoring system 400 is connected to the longitudinal mixer 140 to control the start and stop of the longitudinal mixer 140. At the same time, the surface of the return slurry pipe 250 is provided with a return slurry flowmeter 251 and a return slurry pressure regulating valve 252. The intelligent monitoring system 400 is used to compare the data of the return slurry pressure regulating valve 252 with the return slurry flowmeter 251 in real time, and timely feedback the amount of mud loss in the formation to monitor whether the mud circulation is running smoothly.

[0047] like Figure 1 and Figure 2 As shown, the water adding component 120 includes a water adding pipe and a first electromagnetic flow valve 121 arranged on the water adding pipe, and the material mixing component 130 includes multiple material mixing funnels. A weighing valve is set at the bottom of each material mixing funnel to weigh the material weight. The intelligent monitoring system 400 is connected to the first electromagnetic flow valve 121 and the weighing valve to obtain the amount of water added, the amount of material added and to adjust the mud mixing ratio.

[0048] In this embodiment: the water adding component 120 includes a water adding pipe and a first electromagnetic flow valve 121 arranged on the water adding pipe, the ingredient component 130 includes multiple ingredient funnels, specifically including a clay ingredient funnel, an additive 1 ingredient funnel, and an additive 2 ingredient funnel. There is an ingredient weighing valve under each funnel. The function of the weighing valve is to control the amount of material added. The intelligent monitoring system 400 is connected to the first electromagnetic flow valve 121 and the weighing valve. The intelligent monitoring system 400 controls the opening of the first electromagnetic flow valve 121 to adjust the amount of water added, and adjusts the clay ingredient amount based on the display of the ingredient weighing valve.

[0049] like Figure 1 and Figure 2 As shown, the slurry storage monitoring component includes an online slurry storage viscometer 150, a slurry storage level meter 160, and a slurry storage weighing module 170. The online slurry storage viscometer 150 and the slurry storage level meter 160 are arranged in the inner cavity of the stirring slurry storage barrel 110, and the slurry storage weighing module 170 is arranged at the outer bottom of the stirring slurry storage barrel 110. A slurry outlet 111 is fixedly connected to one side of the stirring slurry storage barrel 110. The intelligent monitoring system 400 is connected to the slurry storage monitoring component to monitor the slurry volume, weight and viscosity in the pulping system 100 in real time.

[0050] In this embodiment: the material in the stirring slurry storage barrel 110 will be output through the slurry outlet 111, and the viscosity will be monitored in real time by the slurry storage online viscometer 150, the mud volume will be monitored in real time by the liquid level meter, and the slurry storage weighing block will monitor the slurry storage weight, which can be combined with the liquid level meter to calculate the mud specific gravity, thereby realizing real-time monitoring of the mud volume, weight and viscosity in the slurry making system 100, and all data are uploaded to the intelligent monitoring system 400 in real time.

[0051] like Figure 3 - Figure 6As shown, the two sides of the longitudinal mixer 140 are fixedly connected with side fixing frames 601, the bottom of the side fixing frames 601 is fixedly connected to the top of the mixing and slurry storage barrel 110, the output shaft of the longitudinal mixer 140 is fixedly connected with a bottom transmission rod 602, the surface of the bottom transmission rod 602 is fixedly connected with a side stirring rod 603, the two sides of the bottom transmission rod 602 are fixedly connected with an inner transmission frame 604, the two sides of the inner transmission frame 604 are fixedly connected with an inner scraper 605, the inner side of the side fixing frame 601 is fixedly connected with an L fixing frame 607, one side of the L fixing frame 607 is fixedly connected with a side limit frame 606, the surface of the side limit frame 606 is provided with an inner limit hole 608, and the inner side of the inner limit hole 608 is movably connected with an inner bearing slide rod 609.

[0052] In this embodiment: the longitudinal mixer 140 is firmly fixedly connected to the top of the mixing and slurry storage barrel 110 through two side fixing frames 601, and the intelligent monitoring system 400 is connected to the longitudinal mixer 140 to control the start and stop of the longitudinal mixer 140. At this time, the bottom transmission rod 602 is driven to rotate by the longitudinal mixer 140. During the rotation of the bottom transmission rod 602, it will pass through the inner limiting hole 608 opened on the surface of the side limiting frame 606. The inner bearing slide bar 609 in the inner limiting hole 608 slides with the surface of the bottom transmission rod 602, and the bottom transmission rod 602 can be limited when it rotates. At the same time, the side limiting frame 606 is fixed by the L fixing frame 607, which can improve the stability of the side limiting frame 606, and can drive multiple side stirring rods 603 on the surface of the bottom transmission rod 602 to move along As the inner side of the mixing and slurry storage barrel 110 rotates and stirs, when the clay ingredient enters the mixing and slurry storage barrel 110 from the ingredient assembly 130, water is added to the mixing and slurry storage barrel 110 through the water adding assembly 120, and the slurry is mixed evenly by stirring through the side stirring rod 603. In the process of rotation and mixing of the side stirring rod 603, the rotation of the bottom transmission rod 602 will synchronously drive the inner transmission frame 604 to rotate, and the rotation of the inner transmission frame 604 will simultaneously drive the inner scraper 605 to rotate synchronously. The inner scraper 605 moves along the inner wall of the mixing and slurry storage barrel 110, and the slurry adhering to the inner wall of the mixing and slurry storage barrel 110 can be scraped off, thereby improving the discharging effect of the mixing and slurry storage barrel 110, reducing the accumulation of slurry on the inner wall of the mixing and slurry storage barrel 110, and reducing the cleaning workload of the operator.

[0053] like Figure 1 and Figure 2As shown, the pumping system 200 includes a grouting pump 210 and a drilling rig 220. The inlet of the grouting pump 210 is connected to the mixing and slurry storage barrel 110 through a slurry outlet pipe 230, the outlet of the grouting pump 210 is connected to one end of the slurry delivery pipe 240, and one end of the slurry delivery pipe 240 is connected to the drilling rig 220. The slurry collection barrel 310 is connected through a slurry return pipe 250. While the drilling rig 220 rotates, mud is injected to push the rotating drill bit, so that the drilling fluid can smoothly enter the borehole.

[0054] In this embodiment: driven by the grouting pump 210, the mud flows into the slurry outlet pipe 230 through the slurry outlet 111 at the bottom of the mixing and slurry storage barrel 110, and is supplied to the drilling rig 220 through the slurry delivery pipe 240. The grouting pump 210 can be a BW-250 grouting pump 210, which can be installed under the step of the base frame 500.

[0055] like Figure 1 and Figure 2 As shown, the slurry delivery pipe 240 is provided with a slurry delivery pressure gauge 241 and a slurry delivery flow meter 242, and the return slurry flow meter 251 and a return slurry pressure regulating valve 252 are provided on the return slurry pipe 250. The intelligent monitoring system 400 is connected to the slurry delivery pressure gauge 241, the slurry delivery flow meter 242, the return slurry flow meter 251 and the return slurry pressure regulating valve 252 on the surface of the slurry delivery pipe 240 to regulate the slurry pressure of grouting and return slurry in real time.

[0056] During the above-mentioned circulation process, multiple flow meters and pressure gauges are set on multiple pipelines. The function of the slurry flow meter 242 is to monitor whether the flow rate in the slurry delivery pipe 240 meets the drilling cycle requirements; the function of the return slurry flow meter 251 is to monitor the flow rate in the return slurry pipe 250. The intelligent monitoring system 400 is used to compare the data of the return slurry flow meter 251 with the slurry flow meter 242 in real time, and to promptly feedback the amount of mud loss in the formation to monitor whether the mud circulation is running smoothly.

[0057] like Figure 7 and Figure 8 As shown, the surface of the bottom transmission rod 602 is fixedly connected with the bottom transmission bevel gear 701, one side of the bottom transmission bevel gear 701 is meshedly connected with the side transmission bevel gear 702, one side of the side transmission bevel gear 702 is fixedly connected with the side transmission rod 703, the surface of the side transmission rod 703 is movably sleeved with the top limit frame 706, the bottom of the top limit frame 706 is fixedly connected with the bottom support rod 707, both sides of the bottom support rod 707 are fixedly connected with the bottom support plate 708, one end of the side transmission rod 703 is fixedly connected with the side connection bevel gear 704, and the bottom of the side connection bevel gear 704 is meshedly connected with the bottom connection bevel gear 705.

[0058] In this embodiment, during the rotation of the bottom transmission rod 602, the bottom transmission bevel gear 701 is synchronously driven to rotate. Through the engagement of the bottom transmission bevel gear 701 and the side transmission bevel gear 702, the side transmission bevel gear 702 can be synchronously driven to rotate. During the rotation of the side transmission bevel gear 702, the side transmission rod 703 is driven to rotate synchronously. When the side transmission rod 703 rotates, it is sleeved through the top limit frame 706. The inner side of the top limit frame 706 is provided with an inner bearing slide rod 609 that slides with the surface of the side transmission rod 703 without affecting the free rotation of the side transmission rod 703. The support of the top limit frame 706 by the bottom support rod 707 can improve the support of the top limit frame 703. 6. The stability of the support, at the same time, the bottom support rod 707 can be stably fixed by the bottom supporting plate 708, and the side transmission rod 703 can be supported to keep the side transmission rod 703 rotating freely and stably. The rotated side transmission rod 703 will drive the side connecting bevel gear 704 to rotate synchronously, and the engagement of the side connecting bevel gear 704 with the bottom connecting bevel gear 705 can change the rotation direction, and the side connecting bevel gear 704 can be used to drive the bottom stirring rod 807 to rotate. By transmitting the force through the portable pair, the side stirring rod 603 can be rotated to stir the mud while the bottom stirring rod 807 can be driven to rotate to divide the mud. No additional driving force is required, which improves the energy utilization rate.

[0059] like Figure 1 and Figure 2 As shown, the slurry collection monitoring component includes a slurry collection level meter 320 arranged in the slurry collection barrel 310, a slurry collection online viscometer 330 and a slurry collection weighing module 340 arranged at the bottom outside the slurry collection barrel 310. The intelligent monitoring system 400 is connected to the slurry collection monitoring component to monitor the mud volume, weight and viscosity in the filtration recovery system 300 in real time.

[0060] In this embodiment: the slurry volume, weight, viscosity and specific gravity are monitored. The volume is monitored by a slurry storage level meter 160, the weight is monitored by a slurry storage weighing block, the viscosity is monitored by an online viscometer, and the specific gravity is calculated by converting volume to weight. The monitoring results are displayed on the control screen.

[0061] like Figure 1 and Figure 2 As shown, a grouting pump is provided on one side of the grouting pipe 350, and the grouting pipe 350 is powered by the grouting pump. A second electromagnetic flow valve 351 is provided on the grouting pipe 350, and the grouting pump and the second electromagnetic flow valve 351 are both connected to the intelligent monitoring system 400 to regulate the grouting flow in real time.

[0062] In this embodiment, the slurry storage volume, weight, viscosity, and specific gravity are monitored. The volume is measured by a slurry storage level gauge 160, the weight by a slurry storage weighing module 170, the viscosity by an online viscometer, and the specific gravity by converting volume to weight. Monitoring results are displayed on the control screen of the PLC intelligent control cabinet. If the slurry performance indicators and volume do not meet usage requirements, feedback is provided to the water addition, material addition, stirring, and slurry replenishment control functions.

[0063] like Figure 7 and Figure 9 As shown, the mud vibration screen 311 is an electric filter screen, which includes a motor and a multi-layer screen, and is driven by a motor to achieve vibration of the multi-layer screen. The bottom of the bottom connecting bevel teeth 705 is fixedly connected to a bottom movable toothed disc 801, and the bottom of the bottom movable toothed disc 801 is movably connected to a bottom bearing disc 802. The bottom of the bottom bearing disc 802 is movably connected to a support column 803. One side of the bottom movable toothed disc 801 is meshedly connected to a side movable toothed disc 804. The bottom of the side movable toothed disc 804 is fixedly connected to an arc-shaped connecting plate 805, and the bottom of the arc-shaped connecting plate 805 is fixedly connected to a bottom connecting ring 806. The two sides of the bottom connecting ring 806 are fixedly connected to bottom stirring rods 807, and the bottom of the bottom stirring rod 807 is movably connected to a bottom dividing rod 808.

[0064] In this embodiment: a multi-layer screen can be arranged in the slurry vibrating screen 311, and the electric filter screen uses an upright motor as an excitation source. Eccentric weights are installed at the upper and lower ends of the motor to make the motor rotate and drive the filter screen to vibrate in multiple directions. When the mud with sand and gravel circulates from the return slurry pipe 250 to the slurry collecting barrel 310, the sand and gravel are retained in the upper cavity through the vibration of the electric filter screen and discharged through the slag discharge port 312. The qualified slurry after filtration is collected in the lower cavity and flows back to the mixing slurry storage barrel 110 through the slurry feeding pipe 350. At the same time, after the bottom movable toothed disc 801 is driven to rotate by the rotation of the bottom connecting bevel gear 705, the bottom movable toothed disc 801 is engaged with the side movable toothed disc 804, which can be used to move the bottom movable toothed disc 801 to rotate. When the toothed disc 801 rotates, it synchronously drives the side movable toothed disc 804 to rotate. The rotating side movable toothed disc 804 drives the arc-shaped connecting plate 805 to rotate. The two arc-shaped connecting plates 805 move along the outer side of the return slurry pipe 250 and drive the bottom connecting ring 806 to rotate. The return slurry pipe 250 is arranged on the inner side of the two arc-shaped connecting plates 805, and the two arc-shaped connecting plates 805 do not contact the surface of the return slurry pipe 250 when rotating. When the bottom connecting ring 806 rotates, it drives the bottom stirring rod 807 to rotate. The rotating bottom stirring rod 807 drives multiple bottom dividing rods 808 to move along the screen surface of the electric filter screen, which can increase the screening speed of the mud material on the surface of the electric filter screen and improve the working efficiency of the equipment.

[0065] The intelligent monitoring system 400 is a PLC intelligent control cabinet that connects all mechanical switches and sensor networks, allowing a single operator to complete the entire process.

[0066] The functions of the intelligent monitoring system 400 include:

[0067] Water addition and batching monitoring and control, the PLC intelligent control cabinet quantitatively allocates mud according to the mud formula, using electromagnetic flowmeter and batching weighing valve as sensor control.

[0068] The vertical mixer 140 is frequency-controlled, and the PLC intelligent control cabinet can frequency-control the vertical mixer 140, initially with high frequency for rapid mixing, and later with low frequency to maintain mud performance.

[0069] The slurry storage volume, weight, viscosity, and specific gravity are monitored. Volume is measured via a slurry storage level gauge 160, weight via a slurry storage weighing module 170, viscosity via an online viscometer, and specific gravity is calculated by converting volume to weight. Monitoring results are displayed on the control screen of the PLC intelligent control cabinet. If slurry performance indicators and volume do not meet usage requirements, feedback is provided to the water addition, material addition, mixing, and slurry replenishment control functions.

[0070] The switch of the grouting pump 210, the monitoring and control of the grouting pressure and flow rate are controlled. The pressure of the grouting pump 210 is controlled according to the geological and hydrological conditions and the depth of the formation. The slurry flow meter 242 monitors and counts the slurry consumption.

[0071] Mud pressure maintenance and return slurry volume monitoring and statistics. A return slurry pressure regulating valve 252 and a return slurry flowmeter 251 are installed on the surface of the return slurry pipe 250. The return slurry pressure regulating valve 252 can be controlled at a set value. The pressure can be increased or decreased according to the comparison data between the slag discharge volume and the drilling footage volume to maintain pressure drilling. The return slurry flowmeter 251 is used to monitor and count the return slurry situation and deal with any abnormalities as soon as possible.

[0072] The slurry volume, weight, viscosity and specific gravity are monitored. The volume is measured by a slurry storage level meter 160, the weight is measured by a slurry storage weighing block, the viscosity is measured by an online viscometer, and the specific gravity is calculated by converting volume to weight. The monitoring results are displayed on the control screen.

[0073] The slurry replenishment control, slurry replenishment flow volume and switch are controlled by the slurry replenishment electromagnetic flow valve, and the instructions are fed back by the sensors of the slurry storage module and the slurry collection module. When the slurry storage is insufficient, slurry replenishment is carried out in time.

[0074] The operation process of the intelligent circulation system for drilling mud for underground freezing holes provided by the embodiment of the present invention can be as follows:

[0075] During operation, mud material is added to the mixing and slurry storage barrel 110 through the feed inlet assembly, and the mud material is stirred by the longitudinal mixer 140 to prepare mud. The intelligent monitoring system 400 is connected to the longitudinal mixer 140 to control the start and stop of the longitudinal mixer 140. At this time, the longitudinal mixer 140 drives the bottom transmission rod 602 to rotate, driving the multiple side stirring rods 603 on the surface of the bottom transmission rod 602 to rotate and stir along the inner side of the mixing and slurry storage barrel 110. When the clay ingredient enters the mixing and slurry storage barrel 110 from the ingredient assembly 130, the water is added to the mixing and slurry storage barrel 110 through the water adding assembly 120. 0, the slurry is mixed evenly by stirring with the side stirring rod 603, and in the process of the side stirring rod 603 rotating and mixing, the rotation of the bottom transmission rod 602 will synchronously drive the inner transmission frame 604 to rotate, and the rotation of the inner transmission frame 604 will simultaneously drive the inner scraper 605 to rotate synchronously, and the inner scraper 605 moves along the inner wall of the mixing and slurry storage barrel 110 to scrape off the slurry adhering to the inner wall of the mixing and slurry storage barrel 110, thereby improving the discharging effect of the mixing and slurry storage barrel 110, reducing the accumulation of slurry on the inner wall of the mixing and slurry storage barrel 110, and reducing the cleaning workload of the operator;

[0076] Driven by the power of the grouting pump 210, the mud flows into the slurry outlet 111 at the bottom of the mixing and slurry storage barrel 110 to the slurry outlet pipe 230, and is sent to the grouting pump 210 through the slurry outlet pipe 230, and is transported to the slurry delivery pipe 240 by the grouting pump 210, and is supplied to the drilling rig 220 through the slurry delivery pipe 240; the residual slurry enters the upper cavity of the slurry collecting barrel 310 through the slurry return pipe 250, and the residual slurry is filtered by the mud vibrating screen 311 and enters the lower cavity, and the unfiltered filter residue is discharged through the slag discharge port 312. The qualified mud filtered in the lower cavity can be driven by the power of the slurry feeding pump and enter the mixing and slurry storage barrel 110 through the slurry feeding pipe 350 to recover the mud and replenish the mud in the mixing and slurry storage barrel 110 in time;

[0077] The two arc-shaped connecting plates 805 will move along the outside of the return slurry pipe 250 and drive the bottom connecting ring 806 to rotate. When the bottom connecting ring 806 rotates, it will drive the bottom stirring rod 807 to rotate. The rotating bottom stirring rod 807 will drive multiple bottom dividing rods 808 to move along the screen surface of the electric filter screen, which can increase the screening speed of the mud material on the surface of the electric filter screen and improve the working efficiency of the equipment.

[0078] It can be seen that the intelligent circulation system for underground freezing hole drilling mud provided by the embodiment of the present invention integrates slurry making, pressure-maintaining pumping and residual slurry filtration and recovery into an integrated design, is easy to use, can reduce manual labor and save raw material costs.

[0079] In an exemplary embodiment of the present invention, the chassis 500 carries various systems, and its dimensions may be as follows: about 2.2 m in length, about 0.8 m in width, and about 0.6 m in height, and the chassis 500 is stepped in the longitudinal direction.

[0080] In an exemplary embodiment of the present invention, the grouting pump 210 may be a BW-250 grouting pump 210 , which may be installed below the step of the base frame 500 .

[0081] During the above-mentioned circulation process, multiple flow meters and pressure gauges are set on multiple pipelines. The function of the slurry flow meter 242 is to monitor whether the flow rate in the slurry delivery pipe 240 meets the drilling cycle requirements; the function of the return slurry flow meter 251 is to monitor the flow rate in the return slurry pipe 250. The intelligent monitoring system 400 is used to compare the data of the return slurry flow meter 251 with the slurry flow meter 242 in real time, and to promptly feedback the amount of mud loss in the formation to monitor whether the mud circulation is running smoothly.

[0082] In addition, the intelligent monitoring system 400 is further configured to display the currently monitored weight monitoring data in real time based on the weight monitoring signal fed back by the weighing module, and to control the operating status of the longitudinal mixer 140, the pulping system 100, and the filtration recovery system 300. In some preferred embodiments, the intelligent monitoring system 400 is further configured to generate an alarm when the real-time weight data of the pulp exceeds a predetermined weight threshold.

[0083] The intelligent monitoring system 400 may include a control display panel on which various functional switches are integrated for controlling the operating status of the grouting pump 210, the slurry replenishment pump, and the longitudinal mixer 140, and can display the grouting flow and the return slurry flow, the mud weight in the mixing and storage barrel 110, and the mud weight in the slurry collection barrel 310 in real time, and issue an alarm when the operation is abnormal.

[0084] The intelligent circulation system for underground freezing hole drilling mud provided by the present invention integrates slurrying, grouting and filtration and recovery into one system through modular design. Slurrying is completed by quantitative batching, automatic stirring and real-time monitoring of the slurry ratio through the slurrying system 100. After the grouting circulation through the pumping system 200, the slurry with sand and gravel is recovered to the filtration and recovery system 300, filtered in the filtration and recovery system 300, and the slag is discharged. After the slurry is collected, it is injected into the slurrying system 100 again to complete the circulation. This system realizes real-time adjustment of mud performance, controllable mud pressure, and efficient filtration and recovery circulation, and also provides an intelligent monitoring system 400 to monitor each module in real time, thereby achieving the construction goals of intelligence, efficiency, greenness and safety.

[0085] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. While specific details are described in detail in the preferred embodiments to provide a thorough understanding of the present invention, those skilled in the art will be able to fully understand the present invention without these details. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0086] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An intelligent circulation system for underground frozen hole drilling mud, including a slurry making system, characterized by: The bottom of the slurry making system is fixedly connected to a base frame, and the slurry making system includes a mixing slurry storage barrel, a water adding assembly, a batching assembly and a longitudinal mixer. The longitudinal mixer is partially arranged in the mixing slurry storage barrel to stir the slurry. The water adding assembly and the batching assembly are arranged on the top of the mixing slurry storage barrel. The water adding assembly and the batching assembly cooperate to adjust the mud mixing ratio. The mixing slurry storage barrel is also provided with a slurry storage monitoring assembly to monitor the mud volume, weight and viscosity in real time. A pumping system, wherein the pumping system is connected to the mixing and slurry storage barrel through a slurry discharge pipe; A filtration and recovery system, the filtration and recovery system comprising a slurry collecting barrel, a slurry vibrating screen being transversely arranged in the slurry collecting barrel and dividing the slurry collecting barrel into an upper cavity and a lower cavity, a slurry return pipe being arranged on one side of the slurry collecting barrel, the slurry return pipe being in communication with the upper cavity, a slag discharge port being arranged on one side of the upper cavity, the lower cavity being in communication with the agitating slurry storage barrel through a slurry feeding pipe so that qualified slurry filtered by the slurry vibrating screen can flow back to the agitating slurry storage barrel, a slurry collection monitoring component being arranged in the slurry collecting barrel to monitor the slurry volume, weight and viscosity in real time; An intelligent monitoring system, which is connected to the pulping system, pumping system, and filtration recovery system respectively. The intelligent monitoring system is a PLC intelligent control cabinet. The intelligent monitoring system monitors the mud circulation information in real time and intelligently controls the working status of the mud circulation system; Both sides of the longitudinal mixer are fixedly connected with side fixing frames, the bottom of the side fixing frames is fixedly connected to the top of the mixing and slurry storage barrel, the output shaft of the longitudinal mixer is fixedly connected with a bottom transmission rod, the surface of the bottom transmission rod is fixedly connected with a side stirring rod, both sides of the bottom transmission rod are fixedly connected with an inner transmission frame, both sides of the inner transmission frame are fixedly connected with an inner scraper, the inner side of the side fixing frame is fixedly connected with an L fixing frame, one side of the L fixing frame is fixedly connected with a side limiting frame, the surface of the side limiting frame is provided with an inner limiting hole, and the inner side of the inner limiting hole is movably connected with an inner bearing sliding rod; The surface of the bottom transmission rod is fixedly connected with the bottom transmission bevel gear, one side of the bottom transmission bevel gear is meshed with the side transmission bevel gear, one side of the side transmission bevel gear is fixedly connected with the side transmission rod, the surface of the side transmission rod is movably sleeved with the top limit frame, the bottom of the top limit frame is fixedly connected with the bottom support rod, the two sides of the bottom support rod are fixedly connected with the bottom supporting plate, one end of the side transmission rod is fixedly connected with the side connecting bevel gear, and the bottom of the side connecting bevel gear is meshed with the bottom connecting bevel gear.

2. The intelligent circulation system for underground freezing hole drilling mud according to claim 1 is characterized in that: The water adding component includes a water adding pipe and a first electromagnetic flow valve arranged on the water adding pipe. The batching component includes multiple batching funnels. A weighing valve is provided at the bottom of each batching funnel to weigh the weight of the ingredients. The intelligent monitoring system is connected to the first electromagnetic flow valve and the weighing valve to obtain the amount of water added, the amount of material added and to adjust the mud mixing ratio.

3. The intelligent circulation system for underground freezing hole drilling mud according to claim 2 is characterized in that: The slurry storage monitoring component includes an online slurry storage viscometer, a slurry storage level meter, and a slurry storage weighing module. The online slurry storage viscometer and the slurry storage level meter are arranged in the inner cavity of the stirring slurry storage barrel, and the slurry storage weighing module is arranged at the outer bottom of the stirring slurry storage barrel. A slurry outlet is fixedly connected to one side of the stirring slurry storage barrel. The intelligent monitoring system is connected to the slurry storage monitoring component to monitor the slurry volume, weight and viscosity in the slurry making system in real time.

4. The intelligent circulation system for underground freezing hole drilling mud according to claim 3 is characterized in that: The pumping system includes a grouting pump and a drilling rig. The inlet of the grouting pump is connected to the slurry outlet pipe, the mixing slurry storage barrel is connected through the slurry outlet pipe, the outlet of the grouting pump is connected to the slurry delivery pipe, one side of the drilling rig is connected to the slurry delivery pipe, and the slurry collecting barrel is connected through the slurry return pipe.

5. The intelligent circulation system for underground freezing hole drilling mud according to claim 4 is characterized in that: The slurry delivery pipe is provided with a slurry delivery pressure gauge and a slurry delivery flow meter, and the intelligent monitoring system is connected to the slurry delivery pressure gauge and the slurry delivery flow meter to regulate the slurry pressure of grouting and slurry return in real time.

6. The intelligent circulation system for underground freezing hole drilling mud according to claim 5, characterized in that: The slurry collection monitoring component includes a slurry collection level meter, a slurry collection online viscometer, and a slurry collection weighing module arranged at the bottom outside the slurry collection barrel. The intelligent monitoring system is connected to the slurry collection monitoring component to monitor the mud volume, weight and viscosity in the filtration recovery system in real time.

7. The intelligent circulation system for underground freezing hole drilling mud according to claim 6 is characterized in that: The grouting pipe is powered by a grouting pump, and a second electromagnetic flow valve is provided on the grouting pipe. The grouting pump and the second electromagnetic flow valve are both connected to the intelligent monitoring system to regulate the grouting flow in real time.

8. The intelligent circulation system for underground freezing hole drilling mud according to claim 7 is characterized in that: The mud vibrating screen is an electric filter screen, which includes a motor and a multi-layer screen, and is driven by a motor to achieve vibration of the multi-layer screen. The bottom of the bottom connecting bevel teeth is fixedly connected to a bottom movable gear disc, the bottom of the bottom movable gear disc is movably connected to a bottom bearing disc, the bottom of the bottom bearing disc is movably connected to a support column, one side of the bottom movable gear disc is meshedly connected to a side movable gear disc, the bottom of the side movable gear disc is fixedly connected to an arc-shaped connecting plate, the bottom of the arc-shaped connecting plate is fixedly connected to a bottom connecting ring, both sides of the bottom connecting ring are fixedly connected to bottom stirring rods, and the bottom of the bottom stirring rod is movably connected to a bottom dividing rod.

Images